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Sample records for gepner models revisited

  1. Free-field representations and geometry of some Gepner models

    SciTech Connect

    Parkhomenko, S. E.

    2010-09-15

    The geometry of the k{sup K} Gepner model, where k + 2 = 2K, is investigated by a free-field representation known as the 'bc{beta}{gamma}' system. Using this representation, we directly show that the internal sector of the model is given by Landau-Ginzburg C{sup K}/Z{sub 2K} orbifold. Then we consider the deformation of the orbifold by a marginal antichiral-chiral operator. Analyzing the chiral de Rham complex structure in the holomorphic sector, we show that it coincides with chiral de Rham complex of some toric manifold, where toric data are given by certain fermionic screening currents. This allows relating the Gepner model deformed by the marginal operator to a {sigma}-model on the CY manifold realized as a double cover of p{sup K-1} with ramification along a certain submanifold.

  2. N=4 characters in Gepner models, orbits and elliptic genera

    NASA Astrophysics Data System (ADS)

    Grünberg, Daniel B.

    2003-12-01

    We review the properties of characters of the N=4 superconformal algebra in the context of a nonlinear sigma model on K3, how they are used to span the orbits, and how the orbits produce topological invariants like the elliptic genus. We derive the same expression for the K3 elliptic genus using three different Gepner models (16, 24, and 43 theories), detailing the orbits and verifying that their coefficients Fi are given by elementary modular functions. We also reveal the orbits for the 1322, 144, and 1242 theories. We derive relations for cubes of theta functions and study the function (1/η)∑n∈Z(-1)n(6n+1)k q(6n+1)2/24 for k=1,2,3,4.

  3. Chiral supersymmetric Standard Model spectra from orientifolds of Gepner models [rapid communication

    NASA Astrophysics Data System (ADS)

    Dijkstra, T. P. T.; Huiszoon, L. R.; Schellekens, A. N.

    2005-03-01

    We construct d = 4, N = 1 orientifolds of Gepner models with just the chiral spectrum of the Standard Model. We consider all simple current modular invariants of c = 9 tensor products of N = 2 minimal models. For some very specific tensor combinations, and very specific modular invariants and orientifold projections, we find a large number of such spectra. We allow for Standard Model singlet (dark) matter and non-chiral exotics. The Chan-Paton gauge group is either U (3) × Sp (2) × U (1) × U (1) or U (3) × U (2) × U (1) × U (1). In many cases the Standard Model hypercharge U (1) has no coupling to RR 2-forms and hence remains massless; in some of those models the B-L gauge boson does acquire a mass.

  4. Bonabeau hierarchy models revisited

    NASA Astrophysics Data System (ADS)

    Lacasa, Lucas; Luque, Bartolo

    2006-07-01

    What basic processes generate hierarchy in a collective? The Bonabeau model provides us a simple mechanism based on randomness which develops self-organization through both winner/looser effects and relaxation process. A phase transition between egalitarian and hierarchic states has been found both analytically and numerically in previous works. In this paper we present a different approach: by means of a discrete scheme we develop a mean field approximation that not only reproduces the phase transition but also allows us to characterize the complexity of hierarchic phase. In the same philosophy, we study a new version of the Bonabeau model, developed by Stauffer et al. Several previous works described numerically the presence of a similar phase transition in this later version. We find surprising results in this model that can be interpreted properly as the non-existence of phase transition in this version of Bonabeau model, but a changing in fixed point structure.

  5. Semiholographic model revisited

    NASA Astrophysics Data System (ADS)

    Cárdenas, Víctor H.; Magaña, Juan; Villanueva, J. R.

    2014-03-01

    In a recent work, Zhang, Li and Noh proposed a model for dark energy assuming that this component strictly obeys the holographic principle. They performed a dynamical system analysis, finding a scaling solution which is helpful to solve the coincidence problem. However, they need explicitly a cosmological constant. In this paper, we derive an explicit analytical solution, without Λ, that shows agreement with the supernovae data. However, this solution is not physical because it violates all the energy conditions.

  6. Bayesian Constrained Local Models Revisited.

    PubMed

    Martins, Pedro; Henriques, Jo Ao F; Caseiro, Rui; Batista, Jorge

    2016-04-01

    This paper presents a novel Bayesian formulation for aligning faces in unseen images. Our approach revisits the Constrained Local Models (CLM) formulation where an ensemble of local feature detectors are constrained to lie within the subspace spanned by a Point Distribution Model (PDM). Fitting such a model to an image typically involves two main steps: a local search using a detector, obtaining response maps for each landmark (likelihood term) and a global optimization that finds the PDM parameters that jointly maximize all the detections at once. The so-called global optimization can be posed as a Bayesian inference problem, where the posterior distribution of the shape (and pose) parameters can be inferred in a maximum a posteriori (MAP) sense. This work introduces an extended Bayesian global optimization strategy that includes two novel additions: (1) to perform second order updates of the PDM parameters (accounting for their covariance) and (2) to model the underlying dynamics of the shape variations, encoded in the prior term, by using recursive Bayesian estimation. Extensive evaluations were performed against state-of-the-art methods on several standard datasets (IMM, BioID, XM2VTS, LFW and FGNET Talking Face). Results show that the proposed approach significantly increases the fitting performance. PMID:26959675

  7. Consistency of the triplet seesaw model revisited

    NASA Astrophysics Data System (ADS)

    Bonilla, Cesar; Fonseca, Renato M.; Valle, J. W. F.

    2015-10-01

    Adding a scalar triplet to the Standard Model is one of the simplest ways of giving mass to neutrinos, providing at the same time a mechanism to stabilize the theory's vacuum. In this paper, we revisit these aspects of the type-II seesaw model pointing out that the bounded-from-below conditions for the scalar potential in use in the literature are not correct. We discuss some scenarios where the correction can be significant and sketch the typical scalar boson profile expected by consistency.

  8. Revisiting the R νMDM models

    NASA Astrophysics Data System (ADS)

    Cai, Yi; Schmidt, Michael A.

    2016-05-01

    Combining neutrino mass generation and a dark matter candidate in a unified model has always been intriguing. We revisit the class of R νMDM models, which incorporate minimal dark matter in radiative neutrino mass models based on the one-loop ultraviolet completions of the Weinberg operator. The possibility of an exact accidental Z 2 is completely ruled out in this scenario. We study the phenomenology of one of the models with an approximate Z 2 symmetry. In addition to the Standard Model particles, it contains two real scalar quintuplets, one vector-like quadruplet fermion and a fermionic quintuplet. The neutral component of the fermionic quintuplet serves as a good dark matter candidate which can be tested by the future direct and indirect detection experiments. The constraints from flavor physics and electroweak-scale naturalness are also discussed.

  9. The sausage sigma model revisited

    NASA Astrophysics Data System (ADS)

    Suneeta, Vardarajan

    2015-06-01

    Fateev’s sausage sigma models in two and three dimensions are known to be integrable. We study their stability under renormalization group (RG) flow in the target space by using results from the mathematics of Ricci flow. We show that the three-dimensional sausage is unstable, whereas the two-dimensional sausage appears to be stable at least at leading order as it approaches the sphere. We speculate that the stability results obtained are linked to the classification of ancient solutions to Ricci flow (i.e., sigma models that are nonperturbative in the infrared regime) in two and three dimensions. We also describe a class of perturbations of the three-dimensional sausage (with the same continuous symmetries) which remarkably decouple. This indicates that there could be a new solution to RG flow, which is described at least perturbatively as a deformation of the sausage.

  10. Fusion by Diffusion Model Revisited

    NASA Astrophysics Data System (ADS)

    Cap, T.; Siwek-Wilczyńska, K.; Wilczyński, J.

    A complete set of 27 excitation functions for synthesis of superheavy nuclei produced in cold fusion reactions was analyzed in terms of the "Fusion by Diffusion Model" of Światecki et al., modified to account for the angular momentum dependence of the fusion hindrance factor. The data on cold fusion reactions originate from experiments carried out at GSI Darmstadt, RIKEN Tokyo and LBNL Berkeley in which 208Pb and 209Bi targets were bombarded with the variety of projectiles ranging from 48,50Ti to 70Zn.

  11. Lambert's multiple reflection model revisited

    NASA Astrophysics Data System (ADS)

    Hahlweg, Cornelius; Rothe, Hendrik

    2011-10-01

    In last years paper on the idea of Lambertian reflection we gave a partial translation of an almost lost chapter by Lambert on multiple reflection as a gimmick. The problem of multiple reflections is of special interest in scatterometric devices. The present paper is dedicated to a deeper discussion of the model proposed by J.H. Lambert or, better to say, a derivation using the matrix method of paraxial optics. Further some examples and special cases - especially the consequences for scatterometer design - are discussed. For easy handling it would be desirable to derive some simplified formulas describing the effective higher order refraction qualities of thick lenses, which might support the choice of lenses for certain applications.

  12. A Multi-Level Model of Moral Functioning Revisited

    ERIC Educational Resources Information Center

    Reed, Don Collins

    2009-01-01

    The model of moral functioning scaffolded in the 2008 "JME" Special Issue is here revisited in response to three papers criticising that volume. As guest editor of that Special Issue I have formulated the main body of this response, concerning the dynamic systems approach to moral development, the problem of moral relativism and the role of…

  13. Revisiting the minimal chaotic inflation model

    NASA Astrophysics Data System (ADS)

    Harigaya, Keisuke; Ibe, Masahiro; Kawasaki, Masahiro; Yanagida, Tsutomu T.

    2016-05-01

    We point out that the prediction of the minimal chaotic inflation model is altered if a scalar field takes a large field value close to the Planck scale during inflation due to a negative Hubble induced mass. In particular, we show that the inflaton potential is effectively flattened at a large inflaton field value in the presence of such a scalar field. The scalar field may be identified with the standard model Higgs field or super partners of standard model fermions. With such Hubble-induced flattening, we find that the minimal chaotic inflation model, especially the model with a quadratic potential, is consistent with recent observations of the cosmic microwave background fluctuation without modifying the inflation model itself.

  14. Revisited modeling of Titan’s middle atmosphere electrical conductivity

    NASA Astrophysics Data System (ADS)

    Mishra, Alabhya; Michael, Marykutty; Tripathi, Sachchida Nand; Béghin, Christian

    2014-08-01

    The atmospheric electrical conductivity measured by the Permittivity, Wave and Altimetry (PWA) subsystem on board the Huygens probe, during the landing mission on Titan, has been modeled in the present work. Previous modeling studies showed a Galactic Cosmic Ray (GCR) peak of conductivity at a higher altitude and a quantitative overestimation in the altitude range 0-100 km compared to that observed by the PWA instrument. Recently the PWA data was revisited and provided new constraints on the conductivity at altitudes 100-180 km. Because the aerosols in the atmosphere are known to alter the electron concentration, using a detailed distribution of the aerosols at all altitudes, the electron conductivity has been calculated in the altitude range 0-180 km. By using a variable range of photoemission threshold for the aerosols, the present model is able to reasonably predict the altitude at which the GCR peak of conductivity occurs and to meet the new constraints for the conductivity profile.

  15. Sverdlovsk revisited: modeling human inhalation anthrax.

    PubMed

    Wilkening, Dean A

    2006-05-16

    Several models have been proposed for the dose-response function and the incubation period distribution for human inhalation anthrax. These models give very different predictions for the severity of a hypothetical bioterror attack, when an attack might be detected from clinical cases, the efficacy of medical intervention and the requirements for decontamination. Using data from the 1979 accidental atmospheric release of anthrax in Sverdlovsk, Russia, and limited nonhuman primate data, this paper eliminates two of the contending models and derives parameters for the other two, thereby narrowing the range of models that accurately predict the effects of human inhalation anthrax. Dose-response functions that exhibit a threshold for infectivity are contraindicated by the Sverdlovsk data. Dose-dependent incubation period distributions explain the 10-day median incubation period observed at Sverdlovsk and the 1- to 5-day incubation period observed in nonhuman primate experiments. PMID:16679412

  16. Potts-model critical manifolds revisited

    NASA Astrophysics Data System (ADS)

    Scullard, Christian R.; Lykke Jacobsen, Jesper

    2016-03-01

    We compute critical polynomials for the q-state Potts model on the Archimedean lattices, using a parallel implementation of the algorithm of Jacobsen (2014 J. Phys. A: Math. Theor 47 135001) that gives us access to larger sizes than previously possible. The exact polynomials are computed for bases of size 6 × 6 unit cells, and the root in the temperature variable v={{{e}}}K-1 is determined numerically at q = 1 for bases of size 8 × 8. This leads to improved results for bond percolation thresholds, and for the Potts-model critical manifolds in the real (q, v) plane. In the two most favourable cases, we find now the kagome-lattice threshold to eleven digits and that of the (3,{12}2) lattice to thirteen. Our critical manifolds reveal many interesting features in the antiferromagnetic region of the Potts model, and determine accurately the extent of the Berker-Kadanoff phase for the lattices studied.

  17. The Bonn nuclear quark model revisited

    SciTech Connect

    Providencia, Constanca; Providencia, Joao da Cordeiro, Flavio; Yamamura, Masatoshi; Tsue, Yasuhiko; Nishiyama, Seiya

    2009-08-15

    We present the exact solutions to the equations of the lowest energy states of the colored and color-symmetric sectors of the Bonn quark model, which is SU(3) symmetric and is defined in terms of an effective pairing force with su(4) algebraic structure. We show that the groundstate of the model is not color symmetrical except for a narrow interval in the range of possible quark numbers. We also study the performance of the Glauber coherent state, as well as of superconducting states of the BCS type, with respect to the description, not only of the absolute (colored) groundstate, but also of the minimum energy state of the color-symmetrical sector, finding that it is remarkably good. We use the model to discuss, in a schematic context, some controversial aspects of the conventional treatment of color superconductivity.

  18. Complex trait architecture: the pleiotropic model revisited

    PubMed Central

    North, T.-L.; Beaumont, M. A.

    2015-01-01

    There is currently much debate about how much the genetic heritability of complex traits is due to very rare alleles. This issue is important because it determines sampling strategies for genetic association studies. Several recent theoretical papers based on a pleiotropic model for trait evolution suggest that it is possible that a large proportion of the genetic variance could be explained by rare alleles. This model assumes that mutations with a large effect on fitness also tend to have large positive or negative effects on phenotypic traits. We show that conclusions based on standard diffusion results are generally applicable to simulations of whole genomes with overlapping generations in a finite population, although the variance contribution of rare alleles is somewhat smaller than theoretical predictions. We show that under many scenarios the pleiotropic model predicts trait distributions that are unrealistically leptokurtic. We argue that this imposes a limit on the relationship between fitness and trait effects. PMID:25792462

  19. Kuwaiti oil fires—Modeling revisited

    NASA Astrophysics Data System (ADS)

    Husain, Tahir

    Just after the invasion of Kuwait, scientists began predictions on the environmental disaster due to threat by the Iraqi regime to blow out oil wells in the Kuwaiti oil fields. The findings with the speculations ranging from a nuclear winter to super-acid rain and global warming were presented in the World Climate Conference in Geneva in November 1990. Just before the war erupted in the middle of January 1991, a conference in London was called to discuss the potential risks to human life and ecological systems in case of blow out of oil fields. The scientists, using modeling techniques, raised the speculations about the global impact which, however, was discounted at a later stage. This paper presents an overview of the selected models used to assess the local, regional, and global impacts. The paper also highlights the model and data limitations and suggests future research directions to respond more effectively under emergency situations.

  20. Density waves in the Calogero model - revisited

    SciTech Connect

    Bardek, V. Feinberg, J. Meljanac, S.

    2010-03-15

    The Calogero model bears, in the continuum limit, collective excitations in the form of density waves and solitary modulations of the density of particles. This sector of the spectrum of the model was investigated, mostly within the framework of collective-field theory, by several authors, over the past 15 years or so. In this work we shall concentrate on periodic solutions of the collective BPS-equation (also known as 'finite amplitude density waves'), as well as on periodic solutions of the full static variational equations which vanish periodically (also known as 'large amplitude density waves'). While these solutions are not new, we feel that our analysis and presentation add to the existing literature, as we explain in the text. In addition, we show that these solutions also occur in a certain two-family generalization of the Calogero model, at special points in parameter space. A compendium of useful identities associated with Hilbert transforms, including our own proofs of these identities, appears in Appendix A. In Appendix B we also elucidate in the present paper some fine points having to do with manipulating Hilbert-transforms, which appear ubiquitously in the collective field formalism. Finally, in order to make this paper self-contained, we briefly summarize in Appendix C basic facts about the collective field formulation of the Calogero model.

  1. The Hopfield model revisited: covariance and quantization

    NASA Astrophysics Data System (ADS)

    Belgiorno, F.; Cacciatori, S. L.; Dalla Piazza, F.

    2016-01-01

    There are several possible applications of quantum electrodynamics in dielectric media which require a quantum description for the electromagnetic field interacting with matter fields. The associated quantum models can refer to macroscopic electromagnetic fields or, alternatively, to mesoscopic fields (polarization fields) describing an effective interaction between electromagnetic field and matter fields. We adopt the latter approach, and focus on the Hopfield model for the electromagnetic field in a dielectric dispersive medium in a framework in which space-time dependent mesoscopic parameters occur, like susceptibility, matter resonance frequency, and also coupling between electromagnetic field and polarization field. Our most direct goal is to describe in a phenomenological way a space-time varying dielectric perturbation induced by means of the Kerr effect in nonlinear dielectric media. This extension of the model is implemented by means of a Lorentz-invariant Lagrangian which, for constant microscopic parameters, and in the rest frame, coincides with the standard one. Moreover, we deduce a covariant scalar product and provide a canonical quantization scheme which takes into account the constraints implicit in the model. Examples of viable applications are indicated.

  2. Revisiting the vanishing refuge model of diversification

    PubMed Central

    Damasceno, Roberta; Strangas, Maria L.; Carnaval, Ana C.; Rodrigues, Miguel T.; Moritz, Craig

    2014-01-01

    Much of the debate around speciation and historical biogeography has focused on the role of stabilizing selection on the physiological (abiotic) niche, emphasizing how isolation and vicariance, when associated with niche conservatism, may drive tropical speciation. Yet, recent re-emphasis on the ecological dimensions of speciation points to a more prominent role of divergent selection in driving genetic, phenotypic, and niche divergence. The vanishing refuge model (VRM), first described by Vanzolini and Williams (1981), describes a process of diversification through climate-driven habitat fragmentation and exposure to new environments, integrating both vicariance and divergent selection. This model suggests that dynamic climates and peripheral isolates can lead to genetic and functional (i.e., ecological and phenotypic) diversity, resulting in sister taxa that occupy contrasting habitats with abutting distributions. Here, we provide predictions for populations undergoing divergence according to the VRM that encompass habitat dynamics, phylogeography, and phenotypic differentiation across populations. Such integrative analyses can, in principle, differentiate the operation of the VRM from other speciation models. We applied these principles to a lizard species, Coleodactylus meridionalis, which was used to illustrate the model in the original paper. We incorporate data on inferred historic habitat dynamics, phylogeography and thermal physiology to test for divergence between coastal and inland populations in the Atlantic Forest of Brazil. Environmental and genetic analyses are concordant with divergence through the VRM, yet physiological data are not. We emphasize the importance of multidisciplinary approaches to test this and alternative speciation models while seeking to explain the extraordinarily high genetic and phenotypic diversity of tropical biomes. PMID:25374581

  3. Revisiting the vanishing refuge model of diversification.

    PubMed

    Damasceno, Roberta; Strangas, Maria L; Carnaval, Ana C; Rodrigues, Miguel T; Moritz, Craig

    2014-01-01

    Much of the debate around speciation and historical biogeography has focused on the role of stabilizing selection on the physiological (abiotic) niche, emphasizing how isolation and vicariance, when associated with niche conservatism, may drive tropical speciation. Yet, recent re-emphasis on the ecological dimensions of speciation points to a more prominent role of divergent selection in driving genetic, phenotypic, and niche divergence. The vanishing refuge model (VRM), first described by Vanzolini and Williams (1981), describes a process of diversification through climate-driven habitat fragmentation and exposure to new environments, integrating both vicariance and divergent selection. This model suggests that dynamic climates and peripheral isolates can lead to genetic and functional (i.e., ecological and phenotypic) diversity, resulting in sister taxa that occupy contrasting habitats with abutting distributions. Here, we provide predictions for populations undergoing divergence according to the VRM that encompass habitat dynamics, phylogeography, and phenotypic differentiation across populations. Such integrative analyses can, in principle, differentiate the operation of the VRM from other speciation models. We applied these principles to a lizard species, Coleodactylus meridionalis, which was used to illustrate the model in the original paper. We incorporate data on inferred historic habitat dynamics, phylogeography and thermal physiology to test for divergence between coastal and inland populations in the Atlantic Forest of Brazil. Environmental and genetic analyses are concordant with divergence through the VRM, yet physiological data are not. We emphasize the importance of multidisciplinary approaches to test this and alternative speciation models while seeking to explain the extraordinarily high genetic and phenotypic diversity of tropical biomes. PMID:25374581

  4. Neural network modelling of CIMIS-ET0 (revisited)

    NASA Astrophysics Data System (ADS)

    Abrahart, R. J.; Ghani, N. Ab

    2009-04-01

    This paper will revisit the use of four independent hydrometeorological variables to predict 'reference crop evapotranspiration' in a neural network model - calculated as CIMIS-ET0 (Kisi, 2006; Aytek et al., 2008). The two earlier studies are coalesced and their published findings positioned in a broader environmental modelling context. Four models developed on similar datasets are compared and contrasted in the current exercise: a multiple linear regression model (MLIN: Pearson, 1896), a piecewise multiple linear regression model (M5 Model Tree; M5MT: Quinlan, 1992; Wang & Witten, 1997) and two neural network models developed on different optimisation algorithms - Conjugate Gradient (CGNN: Hestenes & Stiefel, 1952) and Levenberg-Marquet (LMNN: Levenberg, 1944; Marquardt, 1963). The results are presented using residual scatterplots so that the exact nature of the each individual modelling solution can be determined: permitting outputs to be interpreted in terms of structures, symmetries, orientations, local features and outliers. The reported inspection and interpretation of plots is matched against a selection of traditional numerical modelling statistics that were computed on HydroTest (http://www.hydrotest.org.uk; Dawson et al., 2007). The reported closeness of earlier neurocomputing outputs to predicted values estimated using a counterpart multiple linear regression model is explained in detail.

  5. The maternal deprivation animal model revisited.

    PubMed

    Marco, Eva M; Llorente, Ricardo; Lpez-Gallardo, Meritxell; Mela, Virginia; Llorente-Berzal, lvaro; Prada, Carmen; Viveros, Mara-Paz

    2015-04-01

    Early life stress, in the form of MD (24h at pnd 9), interferes with brain developmental trajectories modifying both behavioral and neurobiochemical parameters. MD has been reported to enhance neuroendocrine responses to stress, to affect emotional behavior and to impair cognitive function. More recently, changes in body weight gain, metabolic parameters and immunological responding have also been described. Present data give support to the fact that neuronal degeneration and/or astrocyte proliferation are present in specific brain regions, mainly hippocampus, prefrontal cortex and hypothalamus, which are particularly vulnerable to the effects of neonatal stress. The MD animal model arises as a valuable tool for the investigation of the brain processes occurring at the narrow time window comprised between pnd 9 and 10 that are critical for the establishment of brain circuitries critical for the regulation of behavior, metabolism and energy homeostasis. In the present review we will discuss three possible mechanisms that might be crucial for the effects of MD, namely, the rapid increase in glucocorticoids, the lack of the neonatal leptin surge, and the enhanced endocannabinoid signaling during the specific critical period of MD. A better understanding of the mechanisms underlying the detrimental consequences of MD is a concern for public health and may provide new insights into mental health prevention strategies and into novel therapeutic approaches in neuropsychiatry. PMID:25616179

  6. Revisited global drift fluid model for linear devices

    SciTech Connect

    Reiser, Dirk

    2012-07-15

    The problem of energy conserving global drift fluid simulations is revisited. It is found that for the case of cylindrical plasmas in a homogenous magnetic field, a straightforward reformulation is possible avoiding simplifications leading to energetic inconsistencies. The particular new feature is the rigorous treatment of the polarisation drift by a generalization of the vorticity equation. The resulting set of model equations contains previous formulations as limiting cases and is suitable for efficient numerical techniques. Examples of applications on studies of plasma blobs and its impact on plasma target interaction are presented. The numerical studies focus on the appearance of plasma blobs and intermittent transport and its consequences on the release of sputtered target materials in the plasma. Intermittent expulsion of particles in radial direction can be observed and it is found that although the neutrals released from the target show strong fluctuations in their propagation into the plasma column, the overall effect on time averaged profiles is negligible for the conditions considered. In addition, the numerical simulations are utilised to perform an a-posteriori assessment of the magnitude of energetic inconsistencies in previously used simplified models. It is found that certain popular approximations, in particular by the use of simplified vorticity equations, do not significantly affect energetics. However, popular model simplifications with respect to parallel advection are found to provide significant deterioration of the model consistency.

  7. How clonal are Neisseria species? The epidemic clonality model revisited

    PubMed Central

    Tibayrenc, Michel; Ayala, Francisco J.

    2015-01-01

    The three species Neisseria meningitidis, Neisseria gonorrheae, and Neisseria lactamica are often regarded as highly recombining bacteria. N. meningitidis has been considered a paradigmatic case of the “semiclonal model” or of “epidemic clonality,” demonstrating occasional bouts of clonal propagation in an otherwise recombining species. In this model, occasional clonality generates linkage disequilibrium in the short term. In the long run, however, the effects of clonality are countered by recombination. We show that many data are at odds with this proposal and that N. meningitidis fits the criteria that we have proposed for predominant clonal evolution (PCE). We point out that (i) the proposed way to distinguish epidemic clonality from PCE may be faulty and (ii) the evidence of deep phylogenies by microarrays and whole-genome sequencing is at odds with the predictions of the semiclonal model. Last, we revisit the species status of N. meningitidis, N. gonorrheae, and N. lactamica in the light of the PCE model. PMID:26195766

  8. Richards model revisited: validation by and application to infection dynamics.

    PubMed

    Wang, Xiang-Sheng; Wu, Jianhong; Yang, Yong

    2012-11-21

    Ever since Richards proposed his flexible growth function more than half a century ago, it has been a mystery that this empirical function has made many incredible coincidences with real ecological or epidemic data even though one of its parameters (i.e., the exponential term) does not seem to have clear biological meaning. It is therefore a natural challenge to mathematical biologists to provide an explanation of the interesting coincidences and a biological interpretation of the parameter. Here we start from a simple epidemic SIR model to revisit Richards model via an intrinsic relation between both models. Especially, we prove that the exponential term in the Richards model has a one-to-one nonlinear correspondence to the basic reproduction number of the SIR model. This one-to-one relation provides us an explicit formula in calculating the basic reproduction number. Another biological significance of our study is the observation that the peak time is approximately just a serial interval after the turning point. Moreover, we provide an explicit relation between final outbreak size, basic reproduction number and the peak epidemic size which means that we can predict the final outbreak size shortly after the peak time. Finally, we introduce a constraint in Richards model to address over fitting problem observed in the existing studies and then apply our method with constraint to conduct some validation analysis using the data of recent outbreaks of prototype infectious diseases such as Canada 2009 H1N1 outbreak, GTA 2003 SARS outbreak, Singapore 2005 dengue outbreak, and Taiwan 2003 SARS outbreak. Our new formula gives much more stable and precise estimate of model parameters and key epidemic characteristics such as the final outbreak size, the basic reproduction number, and the turning point, compared with earlier simulations without constraints. PMID:22889641

  9. Revisiting the use of hyperdiffusivities in numerical dynamo models

    NASA Astrophysics Data System (ADS)

    Fournier, A.; Aubert, J.

    2012-04-01

    The groundbreaking numerical dynamo models of Glatzmaier & Roberts (1995) and Kuang & Bloxham (1997) received some criticism due to their use of hyperdiffusivities, whereby small scale processes artificially experience much stronger dissipation than large scale processes. This stronger dissipation they chose was anisotropic, in that it was only effective in the horizontal direction, and parameterized in spectral space using the following generic formula for any diffusive parameter ν ν(l) = ν0 ifl ≤ l0, ν(l) = ν0[1 + a(l- l0)n] ifl > l0, in which l is the spherical harmonic degree, ν0 is a reference value, l0 is the degree above which hyperdiffusivities start operating, and a and n are real numbers. Following the same choice as the studies mentioned above (which had most notably l0 = 0), Grote & Busse (2000) showed in a fully nonlinear context that the usage of hyperdiffusivities could lead to substantially different dynamics and magnetic field generation mechanisms. Without questioning the physical relevance of this parameterization of subgrid scale processes, we wish here to revisit the use of hyperdiffusivities (as defined mathematically above), on the account of the observation that today's models are run with a truncation at much larger spherical harmonic degree than early models. Consequently, they do not require hyperdiffusivities to kick in at the largest scales (l0 can be set to several tens). An exploration of those regions of parameter space less accessible to numerical models could therefore benefit from their use, provided they do not alter noticeably the largest scales of the dynamo (which are the ones expressing themselves in the record of the geomagnetic secular variation). We compare the statistics of a direct numerical simulation with the statistics of several hyperdiffusive simulations. In the prospect of exploring the parameter space and constructing statistics for their subsequent use for geomagnetic data assimilation practice, we conclude that a sensible use of hyperdiffusivities can lead to a much wanted decrease in computational cost, while not altering the nature of the solution.

  10. Friction versus dilation revisited: insights from theoretical and numerical models

    NASA Astrophysics Data System (ADS)

    Makedonska, N.; Sparks, D. W.; Aharonov, E.; Goren, L.

    2009-12-01

    The intimate relation between apparent friction of shearing granular layers and their dilation was already discussed by Mead in 1925. Motivated by the importance of this connection to the frictional strength of geological faults and to earthquake generation, many laboratory and numerical experiments on sheared granular layers investigated the relation between the apparent friction, μa, and the dilation (under most situations equivalent to the change in porosity). Apparent friction is defined as the ratio of the externally-applied shear stress to the stress applied normal to the layer, measured during constant shear strain rate. Although the nature of the connection is not very well established, μa is often cited to be the sum of two contributions: 1. The surface friction coefficient, μs, of the grains and 2. The dilation rate. The contribution of the dilation rate to μa arises since dilation is required to allow grain rearrangement during shear, yet dilation requires input of work against the normal stress. We revisit the connection between apparent friction and dilation using theoretical treatment of two-dimensional sheared uniform granular layers and complementary Discrete Element simulations, both for gouge layers and for a rough surface without gouge. Our theoretical calculation shows that fluctuations in both μa and dilation rate that occur during a particular type grain-scale shear motion follow a relationship that is non-linear, although in practice appears close to linear. Results show that dilation (and hence μa) is connected to shear localization. In numerical simulations of mono-sized gouge layers (without grain breaking or chemical processes) shear localization occurs but does not persist; instead the systems fluctuate between a state of distributed shear and dilation and a localized motion on short-lived shear planes, with overall compaction. The transition between these two types of shear involves a large change in dilation rate, and leads to large deviations from the sublinear friction-dilation rate relationship. Models with non-uniform grains also show significant scatter about the linear relationship, and we attribute this to short-lived temporal and spatial variations in the extent of shear localization. We discuss the physical origin of these fluctuations.

  11. Revisiting the Mode-Beating Model of AC Helicity Injection

    NASA Astrophysics Data System (ADS)

    Sauppe, J. P.; Sovinec, C. R.

    2010-11-01

    Oscillating field current drive (OFCD), or AC helicity injection, is an important candidate for current sustainment in reversed-field pinch devices. Bellan examined AC helicity injection in a slab geometry and described it as a beating between two plasma modes that produces a mean current parallel to the equilibrium magnetic field [P. M. Bellan. Phys. Rev. Lett. 54, 1381 (1985)]. This mean current is confined to within a classical resistive skin depth of the plasma surface, and plasma relaxation is responsible for transporting this current to the core. We revisit this analytical work and examine how this wave-beating effect is represented in zero-beta MHD simulations, including consideration of the choice of boundary conditions. In addition to the expected parallel current, numerical simulations show a pinch effect from a cycle-averaged current that is perpendicular to the mean magnetic field, which is not described in Bellan's original work. Our results are discussed with respect to Boozer's general anti-dynamo theorem [A. H. Boozer. Phys. Fluids B Vol. 5, 2271 (1993)].

  12. The Gate Theory of Pain Revisited: Modeling Different Pain Conditions with a Parsimonious Neurocomputational Model

    PubMed Central

    Ropero Peláez, Francisco Javier; Taniguchi, Shirley

    2016-01-01

    The gate control theory of pain proposed by Melzack and Wall in 1965 is revisited through two mechanisms of neuronal regulation: NMDA synaptic plasticity and intrinsic plasticity. The Melzack and Wall circuit was slightly modified by using strictly excitatory nociceptive afferents (in the original arrangement, nociceptive afferents were considered excitatory when they project to central transmission neurons and inhibitory when projecting to substantia gelatinosa). The results of our neurocomputational model are consistent with biological ones in that nociceptive signals are blocked on their way to the brain every time a tactile stimulus is given at the same locus where the pain was produced. In the computational model, the whole set of parameters, independently of their initialization, always converge to the correct values to allow the correct computation of the circuit. To test the model, other painful conditions were analyzed: phantom limb pain, wind-up and wind-down pain, breakthrough pain, and demyelinating syndromes like Guillain-Barré and multiple sclerosis. PMID:27088014

  13. The Gate Theory of Pain Revisited: Modeling Different Pain Conditions with a Parsimonious Neurocomputational Model.

    PubMed

    Ropero Peláez, Francisco Javier; Taniguchi, Shirley

    2016-01-01

    The gate control theory of pain proposed by Melzack and Wall in 1965 is revisited through two mechanisms of neuronal regulation: NMDA synaptic plasticity and intrinsic plasticity. The Melzack and Wall circuit was slightly modified by using strictly excitatory nociceptive afferents (in the original arrangement, nociceptive afferents were considered excitatory when they project to central transmission neurons and inhibitory when projecting to substantia gelatinosa). The results of our neurocomputational model are consistent with biological ones in that nociceptive signals are blocked on their way to the brain every time a tactile stimulus is given at the same locus where the pain was produced. In the computational model, the whole set of parameters, independently of their initialization, always converge to the correct values to allow the correct computation of the circuit. To test the model, other painful conditions were analyzed: phantom limb pain, wind-up and wind-down pain, breakthrough pain, and demyelinating syndromes like Guillain-Barré and multiple sclerosis. PMID:27088014

  14. Revisiting the classical electron model in general relativity

    NASA Astrophysics Data System (ADS)

    Rahaman, Farook; Jamil, Mubasher; Chakraborty, Kaushik

    2011-01-01

    Motivated by earlier studies (Tiwari et al. in Astrophys. Space Sci. 182:105, 1984; Herrera and Varela in Phys. Lett. 189:11, 1994), we model electron as a spherically symmetric charged perfect fluid distribution of matter. The existing model is extended assuming a matter source that is characterized by quadratic equation of state in the context of general theory of relativity. For the suitable choices of the parameters, our charged fluid models almost satisfy the physical properties of electron.

  15. Revisiting "Discrepancy Analysis in Continuing Medical Education: A Conceptual Model"

    ERIC Educational Resources Information Center

    Fox, Robert D.

    2011-01-01

    Based upon a review and analysis of selected literature, the author presents a conceptual model of discrepancy analysis evaluation for planning, implementing, and assessing the impact of continuing medical education (CME). The model is described in terms of its value as a means of diagnosing errors in the development and implementation of CME. The…

  16. Terrestrial nitrogen cycling in Earth system models revisited

    USGS Publications Warehouse

    Stocker, Benjamin D; Prentice, I Colin; Cornell, Sarah; Davies-Barnard, T; Finzi, Adrien; Franklin, Oskar; Janssens, Ivan; Larmola, Tuula; Manzoni, Stefano; Näsholm, Torgny; Raven, John; Rebel, Karin; Reed, Sasha C.; Vicca, Sara; Wiltshire, Andy; Zaehle, Sönke

    2016-01-01

    Understanding the degree to which nitrogen (N) availability limits land carbon (C) uptake under global environmental change represents an unresolved challenge. First-generation ‘C-only’vegetation models, lacking explicit representations of N cycling,projected a substantial and increasing land C sink under rising atmospheric CO2 concentrations. This prediction was questioned for not taking into account the potentially limiting effect of N availability, which is necessary for plant growth (Hungate et al.,2003). More recent global models include coupled C and N cycles in land ecosystems (C–N models) and are widely assumed to be more realistic. However, inclusion of more processes has not consistently improved their performance in capturing observed responses of the global C cycle (e.g. Wenzel et al., 2014). With the advent of a new generation of global models, including coupled C, N, and phosphorus (P) cycling, model complexity is sure to increase; but model reliability may not, unless greater attention is paid to the correspondence of model process representations ande mpirical evidence. It was in this context that the ‘Nitrogen Cycle Workshop’ at Dartington Hall, Devon, UK was held on 1–5 February 2016. Organized by I. Colin Prentice and Benjamin D. Stocker (Imperial College London, UK), the workshop was funded by the European Research Council,project ‘Earth system Model Bias Reduction and assessing Abrupt Climate change’ (EMBRACE). We gathered empirical ecologists and ecosystem modellers to identify key uncertainties in terrestrial C–N cycling, and to discuss processes that are missing or poorly represented in current models.

  17. Revisiting the domain model for lithium intercalated graphite

    SciTech Connect

    Krishnan, Sridevi; Brenet, Gilles; Caliste, Damien; Genovese, Luigi; Deutsch, Thierry; Pochet, Pascal

    2013-12-16

    In this Letter, we study the stability of the domain model for lithium intercalated graphite in stages III and II by means of Density Functional Theory and Kinetic Lattice Monte Carlo simulations. We find that the domain model is either thermodynamically or kinetically stable when compared to the standard model in stages III and II. The existence of domains in the intercalation sequence is well supported by recent high resolution transmission electron microscope observations in lithiated graphite. Moreover, we predict that such domain staging sequences leads to a wide range of diffusivity as reported in experiments.

  18. Revisiting the domain model for lithium intercalated graphite

    NASA Astrophysics Data System (ADS)

    Krishnan, Sridevi; Brenet, Gilles; Machado-Charry, Eduardo; Caliste, Damien; Genovese, Luigi; Deutsch, Thierry; Pochet, Pascal

    2013-12-01

    In this Letter, we study the stability of the domain model for lithium intercalated graphite in stages III and II by means of Density Functional Theory and Kinetic Lattice Monte Carlo simulations. We find that the domain model is either thermodynamically or kinetically stable when compared to the standard model in stages III and II. The existence of domains in the intercalation sequence is well supported by recent high resolution transmission electron microscope observations in lithiated graphite. Moreover, we predict that such domain staging sequences leads to a wide range of diffusivity as reported in experiments.

  19. The conceptual model for nursing and health policy revisited.

    PubMed

    Russell, Gail E; Fawcett, Jacqueline

    2005-11-01

    A conceptual model of nursing and health policy was proposed by the authors in 2001. Revisions in the model have been made, and the model has been used to guide the evolution of a nursing doctoral program and doctoral dissertation research. The revised model provides a framework for analysis and evaluation of public, organizational, and professional policies influencing the quality, cost, and access to nursing and other health care services, as well as for nursing-discipline specific and health services research at any one of four interacting levels: Level 1--efficacy of nursing practice processes; Level 2--effectiveness of nursing practice processes and effectiveness and efficiency of health care delivery subsystems; Level 3--equity of access to effective and efficient nursing practice processes and efficient nursing practice delivery systems, and equity in distribution of costs and burdens of care delivery; Level 4--justice and the social changes and market interventions addressing equity. PMID:16443986

  20. Spinal shock revisited: a four-phase model.

    PubMed

    Ditunno, J F; Little, J W; Tessler, A; Burns, A S

    2004-07-01

    Spinal shock has been of interest to clinicians for over two centuries. Advances in our understanding of both the neurophysiology of the spinal cord and neuroplasticity following spinal cord injury have provided us with additional insight into the phenomena of spinal shock. In this review, we provide a historical background followed by a description of a novel four-phase model for understanding and describing spinal shock. Clinical implications of the model are discussed as well. PMID:15037862

  1. Electromagnetic braking revisited with a magnetic point dipole model

    NASA Astrophysics Data System (ADS)

    Land, Sara; McGuire, Patrick; Bumb, Nikhil; Mann, Brian P.; Yellen, Benjamin B.

    2016-04-01

    A theoretical model is developed to predict the trajectory of magnetized spheres falling through a copper pipe. The derive magnetic point dipole model agrees well with the experimental trajectories for NdFeB spherical magnets of varying diameter, which are embedded inside 3D printed shells with fixed outer dimensions. This demonstration of electrodynamic phenomena and Lenz's law serves as a good laboratory exercise for physics, electromagnetics, and dynamics classes at the undergraduate level.

  2. Revisiting "nutrient trapping" in global coupled biogeochemical ocean circulation models

    NASA Astrophysics Data System (ADS)

    Dietze, H.; Loeptien, U.

    2013-04-01

    We analyze an extensive set of global coupled biogeochemical ocean circulation models. The focus is on the equatorial Pacific. In all simulations, which are consistent with observed standing stocks of relevant biogeochemical species at the surface, we find spuriously enhanced (reduced) macronutrient (oxygen) concentrations in the deep eastern equatorial Pacific. This modeling problem, apparently endemic to global coupled biogeochemical ocean circulation models, was coined "nutrient trapping" by Najjar et al. (1992). In contrast to Aumont et al. (1999), we argue that "nutrient trapping" is still a persistent problem, even in eddy-permitting models and, further, that the scale of the problem retards model projections of nitrogen cycling. In line with previous work, our results indicate that a deficient circulation is at the core of the problem rather than an admittedly poor quantitative understanding of biogeochemical cycles. More specifically, we present indications that "nutrient trapping" in models is a result of a spuriously damped Equatorial Intermediate (zonal) Current System and Equatorial Deep Jets—phenomenon which await a comprehensive understanding and have, to date, not been successfully simulated.

  3. Steady-state Model of Solar Wind Electrons Revisited

    NASA Astrophysics Data System (ADS)

    Yoon, Peter H.; Kim, Sunjung; Choe, G. S.

    2015-10-01

    In a recent paper, Kim et al. put forth a steady-state model for the solar wind electrons. The model assumed local equilibrium between the halo electrons, characterized by an intermediate energy range, and the whistler-range fluctuations. The basic wave-particle interaction is assumed to be the cyclotron resonance. Similarly, it was assumed that a dynamical steady state is established between the highly energetic superhalo electrons and high-frequency Langmuir fluctuations. Comparisons with the measured solar wind electron velocity distribution function (VDF) during quiet times were also made, and reasonable agreements were obtained. In such a model, however, only the steady-state solution for the Fokker-Planck type of electron particle kinetic equation was considered. The present paper complements the previous analysis by considering both the steady-state particle and wave kinetic equations. It is shown that the model halo and superhalo electron VDFs, as well as the assumed wave intensity spectra for the whistler and Langmuir fluctuations, approximately satisfy the quasi-linear wave kinetic equations in an approximate sense, thus further validating the local equilibrium model constructed in the paper by Kim et al.

  4. Zwislocki's model of the middle ear re-visited

    NASA Astrophysics Data System (ADS)

    Withnell, Robert H.; Fields, Taylor N.

    2015-12-01

    Zwislocki's circuit model of the middle ear [11] has been used, in original or modified form, in subsequent studies modeling the ear [4, 6]. The model includes two eardrum modes of vibration, a shunt for flexible coupling between the incus and stapes, and a single tuned oscillator for ossicular vibration. The contribution of each of these mechanisms was examined by fitting a model of the ear to acoustic input impedance data from healthy human ears. The circuit elements for a non-ossicular eardrum vibration and a flexible coupling between the incus and stapes were found to be detrimental or non-essential for the model-fit-to-data. A single mode of eardrum vibration for sound transmission to the middle ear is consistent with the eardrum acting as an impedance-matching device, with pars-tensa eardrum vibration coupled to the ossicles [1]. A single-tuned oscillator was insufficient to account for the bandwidth of the ear. The frequency response of the ear suggests multiple resonant modes of ossicular vibration.

  5. The Dualistic Model of Ovarian Carcinogenesis: Revisited, Revised, and Expanded.

    PubMed

    Kurman, Robert J; Shih, Ie-Ming

    2016-04-01

    Since our proposal of a dualistic model of epithelial ovarian carcinogenesis more than a decade ago, a large number of molecular and histopathologic studies were published that have provided important insights into the origin and molecular pathogenesis of this disease. This has required that the original model be revised and expanded to incorporate these findings. The new model divides type I tumors into three groups: i) endometriosis-related tumors that include endometrioid, clear cell, and seromucinous carcinomas; ii) low-grade serous carcinomas; and iii) mucinous carcinomas and malignant Brenner tumors. As in the previous model, type II tumors are composed, for the most part, of high-grade serous carcinomas that can be further subdivided into morphologic and molecular subtypes. Type I tumors develop from benign extraovarian lesions that implant on the ovary and which can subsequently undergo malignant transformation, whereas many type II carcinomas develop from intraepithelial carcinomas in the fallopian tube and, as a result, disseminate as carcinomas that involve the ovary and extraovarian sites, which probably accounts for their clinically aggressive behavior. The new molecular genetic data, especially those derived from next-generation sequencing, further underline the heterogeneity of ovarian cancer and identify actionable mutations. The dualistic model highlights these differences between type I and type II tumors which, it can be argued, describe entirely different groups of diseases. PMID:27012190

  6. The hydrogeologic-geochemical model of Cerro Prieto revisited

    SciTech Connect

    Lippmann, M.J.; Halfman, S.E.; Truesdell, A.H.; Manon M., A.

    1989-01-01

    As the exploitation of the Cerro Prieto, Mexico, geothermal field continues, there is increasing evidence that the hydrogeologic model developed by Halfman et al. (1984, 1986) presents the basic features controlling the movement of geothermal fluids in the system. At the present time the total installed capacity at Cerro Prieto is 620 MWe requiring the production of more than 10,500 tonnes/hr of a brine-steam mixture. This significant rate of fluid production has resulted in changes in reservoir thermodynamic conditions and in the chemistry of the produced fluids. After reviewing the hydrogeologic-geochemical model of Cerro Prieto, some of the changes observed in the field due to its exploitation are discussed and interpreted on the basis of the model. 21 refs., 11 figs., 1 tab.

  7. The theoretical model for the annular jet instability - Revisited

    NASA Technical Reports Server (NTRS)

    Lee, C. P.; Wang, T. G.

    1989-01-01

    The theoretical model of Lee and Wang (1986) for the instability of an annular jet, in which the jet's liquid layer is treated as a thin liquid sheet, is examined. It is suggested that the model should be altered so that when the envelope is closing its bottleneck during collapse, the new envelope experiences a sharp pressure pulse from its gaseous core, reversing the normal velocity of the sheet enough to maintain continuous constant gas flow. Using this improved version of the model, it is shown that if the liquid velocity is high enough and the gas velocity is greater than the liquid velocity, the bubble-formation frequency varies linearly with the difference between the two velocities, but not with their individual values.

  8. Energy-economy interactions revisited within a comprehensive sectoral model

    SciTech Connect

    Hanson, D. A.; Laitner, J. A.

    2000-07-24

    This paper describes a computable general equilibrium (CGE) model with considerable sector and technology detail, the ``All Modular Industry Growth Assessment'' Model (AMIGA). It is argued that a detailed model is important to capture and understand the several rolls that energy plays within the economy. Fundamental consumer and industrial demands are for the services from energy; hence, energy demand is a derived demand based on the need for heating, cooling mechanical, electrical, and transportation services. Technologies that provide energy-services more efficiently (on a life cycle basis), when adopted, result in increased future output of the economy and higher paths of household consumption. The AMIGA model can examine the effects on energy use and economic output of increases in energy prices (e.g., a carbon charge) and other incentive-based policies or energy-efficiency programs. Energy sectors and sub-sector activities included in the model involve energy extraction conversion and transportation. There are business opportunities to produce energy-efficient goods (i.e., appliances, control systems, buildings, automobiles, clean electricity). These activities are represented in the model by characterizing their likely production processes (e.g., lighter weight motor vehicles). Also, multiple industrial processes can produce the same output but with different technologies and inputs. Secondary recovery, i.e., recycling processes, are examples of these multiple processes. Combined heat and power (CHP) is also represented for energy-intensive industries. Other modules represent residential and commercial building technologies to supply energy services. All sectors of the economy command real resources (capital services and labor).

  9. The Thirring-Wess model revisited: a functional integral approach

    SciTech Connect

    Belvedere, L.V. . E-mail: armflavio@if.uff.br

    2005-06-01

    We consider the Wess-Zumino-Witten theory to obtain the functional integral bosonization of the Thirring-Wess model with an arbitrary regularization parameter. Proceeding a systematic of decomposing the Bose field algebra into gauge-invariant- and gauge-non-invariant field subalgebras, we obtain the local decoupled quantum action. The generalized operator solutions for the equations of motion are reconstructed from the functional integral formalism. The isomorphism between the QED {sub 2} (QCD {sub 2}) with broken gauge symmetry by a regularization prescription and the Abelian (non-Abelian) Thirring-Wess model with a fixed bare mass for the meson field is established.

  10. Re-visiting the trans insertion model for complexin clamping.

    PubMed

    Krishnakumar, Shyam S; Li, Feng; Coleman, Jeff; Schauder, Curtis M; Kümmel, Daniel; Pincet, Frederic; Rothman, James E; Reinisch, Karin M

    2015-01-01

    We have previously proposed that complexin cross-links multiple pre-fusion SNARE complexes via a trans interaction to function as a clamp on SNARE-mediated neurotransmitter release. A recent NMR study was unable to detect the trans clamping interaction of complexin and therefore questioned the previous interpretation of the fluorescence resonance energy transfer and isothermal titration calorimetry data on which the trans clamping model was originally based. Here we present new biochemical data that underscore the validity of our previous interpretation and the continued relevancy of the trans insertion model for complexin clamping. PMID:25831964

  11. Simulating runoff under changing climatic conditions: Revisiting an apparent deficiency of conceptual rainfall-runoff models

    NASA Astrophysics Data System (ADS)

    Fowler, Keirnan J. A.; Peel, Murray C.; Western, Andrew W.; Zhang, Lu; Peterson, Tim J.

    2016-03-01

    Hydrologic models have potential to be useful tools in planning for future climate variability. However, recent literature suggests that the current generation of conceptual rainfall runoff models tend to underestimate the sensitivity of runoff to a given change in rainfall, leading to poor performance when evaluated over multiyear droughts. This research revisited this conclusion, investigating whether the observed poor performance could be due to insufficient model calibration and evaluation techniques. We applied an approach based on Pareto optimality to explore trade-offs between model performance in different climatic conditions. Five conceptual rainfall runoff model structures were tested in 86 catchments in Australia, for a total of 430 Pareto analyses. The Pareto results were then compared with results from a commonly used model calibration and evaluation method, the Differential Split Sample Test. We found that the latter often missed potentially promising parameter sets within a given model structure, giving a false negative impression of the capabilities of the model. This suggests that models may be more capable under changing climatic conditions than previously thought. Of the 282[347] cases of apparent model failure under the split sample test using the lower [higher] of two model performance criteria trialed, 155[120] were false negatives. We discuss potential causes of remaining model failures, including the role of data errors. Although the Pareto approach proved useful, our aim was not to suggest an alternative calibration strategy, but to critically assess existing methods of model calibration and evaluation. We recommend caution when interpreting split sample results.

  12. What drives health care expenditure?--Baumol's model of 'unbalanced growth' revisited.

    PubMed

    Hartwig, Jochen

    2008-05-01

    The share of health care expenditure in GDP rises rapidly in virtually all OECD countries, causing increasing concern among politicians and the general public. Yet, economists have to date failed to reach an agreement on what the main determinants of this development are. This paper revisits Baumol's [Baumol, W.J., 1967. Macroeconomics of unbalanced growth: the anatomy of urban crisis. American Economic Review 57 (3), 415-426] model of 'unbalanced growth', showing that the latter offers a ready explanation for the observed inexorable rise in health care expenditure. The main implication of Baumol's model in this context is that health care expenditure is driven by wage increases in excess of productivity growth. This hypothesis is tested empirically using data from a panel of 19 OECD countries. Our tests yield robust evidence in favor of Baumol's theory. PMID:18164773

  13. Revisiting competition in a classic model system using formal links between theory and data.

    PubMed

    Hart, Simon P; Burgin, Jacqueline R; Marshall, Dustin J

    2012-09-01

    Formal links between theory and data are a critical goal for ecology. However, while our current understanding of competition provides the foundation for solving many derived ecological problems, this understanding is fractured because competition theory and data are rarely unified. Conclusions from seminal studies in space-limited benthic marine systems, in particular, have been very influential for our general understanding of competition, but rely on traditional empirical methods with limited inferential power and compatibility with theory. Here we explicitly link mathematical theory with experimental field data to provide a more sophisticated understanding of competition in this classic model system. In contrast to predictions from conceptual models, our estimates of competition coefficients show that a dominant space competitor can be equally affected by interspecific competition with a poor competitor (traditionally defined) as it is by intraspecific competition. More generally, the often-invoked competitive hierarchies and intransitivities in this system might be usefully revisited using more sophisticated empirical and analytical approaches. PMID:23094373

  14. Return distributions in dog-flea model revisited

    NASA Astrophysics Data System (ADS)

    Bakar, Burhan; Tirnakli, Ugur

    2010-09-01

    A recent study of coherent noise model for the system size independent case provides an exact relation between the exponent τ of avalanche size distribution and the q value of the appropriate q-Gaussian that fits the return distribution of the model. This relation is applied to Ehrenfest’s historical dog-flea model by treating the fluctuations around the thermal equilibrium as avalanches. We provide a clear numerical evidence that the relation between the exponent τ of fluctuation length distribution and the q value of the appropriate q-Gaussian obeys this exact relation when the system size is large enough. This allows us to determine the value of the q-parameter a priori from one of the well known exponents of such dynamical systems. Furthermore, it is shown that the return distribution in dog-flea model gradually approaches q-Gaussian as the system size increases and this tendency can be analyzed by a well defined analytical expression.

  15. Laws of reflection and Snell's law revisited by video modeling

    NASA Astrophysics Data System (ADS)

    Rodrigues, M.; Simeão Carvalho, P.

    2014-07-01

    Video modelling is being used, nowadays, as a tool for teaching and learning several topics in Physics. Most of these topics are related to kinematics. In this work we show how video modelling can be used for demonstrations and experimental teaching in optics, namely the laws of reflection and the well-known Snell's Law of light. Videos were recorded with a photo camera at 30 frames/s, and analysed with the open source software Tracker. Data collected from several frames was treated with the Data Tool module, and graphs were built to obtain relations between incident, reflected and refraction angles, as well as to determine the refractive index of Perspex. These videos can be freely distributed in the web and explored with students within the classroom, or as a homework assignment to improve student's understanding on specific contents. They present a large didactic potential for teaching basic optics in high school with an interactive methodology.

  16. MRAC Revisited: Guaranteed Performance with Reference Model Modification

    NASA Technical Reports Server (NTRS)

    Stepanyan, Vahram; Krishnakumar, Kalmaje

    2010-01-01

    This paper presents modification of the conventional model reference adaptive control (MRAC) architecture in order to achieve guaranteed transient performance both in the output and input signals of an uncertain system. The proposed modification is based on the tracking error feedback to the reference model. It is shown that approach guarantees tracking of a given command and the ideal control signal (one that would be designed if the system were known) not only asymptotically but also in transient by a proper selection of the error feedback gain. The method prevents generation of high frequency oscillations that are unavoidable in conventional MRAC systems for large adaptation rates. The provided design guideline makes it possible to track a reference command of any magnitude form any initial position without re-tuning. The benefits of the method are demonstrated in simulations.

  17. Stochastic resonance in neuron models: Endogenous stimulation revisited

    NASA Astrophysics Data System (ADS)

    Plesser, Hans E.; Geisel, Theo

    2001-03-01

    The paradigm of stochastic resonance (SR)-the idea that signal detection and transmission may benefit from noise-has met with great interest in both physics and the neurosciences. We investigate here the consequences of reducing the dynamics of a periodically driven neuron to a renewal process (stimulation with reset or endogenous stimulation). This greatly simplifies the mathematical analysis, but we show that stochastic resonance as reported earlier occurs in this model only as a consequence of the reduced dynamics.

  18. The comfortable driving model revisited: traffic phases and phase transitions

    NASA Astrophysics Data System (ADS)

    Knorr, Florian; Schreckenberg, Michael

    2013-07-01

    We study the spatiotemporal patterns resulting from different boundary conditions for a microscopic traffic model and contrast them with empirical results. By evaluating the time series of local measurements, the local traffic states are assigned to the different traffic phases of Kerner’s three-phase traffic theory. For this classification we use the rule-based FOTO-method, which provides ‘hard’ rules for this assignment. Using this approach, our analysis shows that the model is indeed able to reproduce three qualitatively different traffic phases: free flow (F), synchronized traffic (S), and wide moving jams (J). In addition, we investigate the likelihood of transitions between the three traffic phases. We show that a transition from free flow to a wide moving jam often involves an intermediate transition: first from free flow to synchronized flow and then from synchronized flow to a wide moving jam. This is supported by the fact that the so-called F → S transition (from free flow to synchronized traffic) is much more likely than a direct F → J transition. The model under consideration has a functional relationship between traffic flow and traffic density. The fundamental hypothesis of the three-phase traffic theory, however, postulates that the steady states of synchronized flow occupy a two-dimensional region in the flow-density plane. Due to the obvious discrepancy between the model investigated here and the postulate of the three-phase traffic theory, the good agreement that we found could not be expected. For a more detailed analysis, we also studied vehicle dynamics at a microscopic level and provide a comparison of real detector data with simulated data of the identical highway segment.

  19. Critical rotation of general-relativistic polytropic models revisited

    NASA Astrophysics Data System (ADS)

    Geroyannis, V.; Karageorgopoulos, V.

    2013-09-01

    We develop a perturbation method for computing the critical rotational parameter as a function of the equatorial radius of a rigidly rotating polytropic model in the "post-Newtonia approximation" (PNA). We treat our models as "initial value problems" (IVP) of ordinary differential equations in the complex plane. The computations are carried out by the code dcrkf54.f95 (Geroyannis and Valvi 2012 [P1]; modified Runge-Kutta-Fehlberg code of fourth and fifth order for solving initial value problems in the complex plane). Such a complex-plane treatment removes the syndromes appearing in this particular family of IVPs (see e.g. P1, Sec. 3) and allows continuation of the numerical integrations beyond the surface of the star. Thus all the required values of the Lane-Emden function(s) in the post-Newtonian approximation are calculated by interpolation (so avoiding any extrapolation). An interesting point is that, in our computations, we take into account the complete correction due to the gravitational term, and this issue is a remarkable difference compared to the classical PNA. We solve the generalized density as a function of the equatorial radius and find the critical rotational parameter. Our computations are extended to certain other physical characteristics (like mass, angular momentum, rotational kinetic energy, etc). We find that our method yields results comparable with those of other reliable methods. REFERENCE: V.S. Geroyannis and F.N. Valvi 2012, International Journal of Modern Physics C, 23, No 5, 1250038:1-15.

  20. The Zipf Law revisited: An evolutionary model of emerging classification

    SciTech Connect

    Levitin, L.B.; Schapiro, B.; Perlovsky, L.

    1996-12-31

    Zipf`s Law is a remarkable rank-frequency relationship observed in linguistics (the frequencies of the use of words are approximately inversely proportional to their ranks in the decreasing frequency order) as well as in the behavior of many complex systems of surprisingly different nature. We suggest an evolutionary model of emerging classification of objects into classes corresponding to concepts and denoted by words. The evolution of the system is derived from two basic assumptions: first, the probability to recognize an object as belonging to a known class is proportional to the number of objects in this class already recognized, and, second, there exists a small probability to observe an object that requires creation of a new class ({open_quotes}mutation{close_quotes} that gives birth to a new {open_quotes}species{close_quotes}). It is shown that the populations of classes in such a system obey the Zipf Law provided that the rate of emergence of new classes is small. The model leads also to the emergence of a second-tier structure of {open_quotes}super-classes{close_quotes} - groups of classes with almost equal populations.

  1. The Distributed D-Clean Model Revisited by Templates

    NASA Astrophysics Data System (ADS)

    Zsók, Viktória; Porkoláb, Zoltán

    2011-09-01

    D-Clean is a functional coordination language for distributed computation. The language was designed for the need of high-level process description and communication coordination of functional programs distributed over a cluster. The pure functional computational nodes required language primitives to control the dataflow in a distributed process-network. Therefore, in order to achieve parallel features, we created an extension for the lazy functional programming language Clean using new language elements. D-Clean is compiled to an intermediate level language called D-Box, which is designed for the description of the computational nodes. Every D-Clean construct generates a D-Box expression. The D-Box expressions hide the low level implementation details and enable direct control over the process-network. The asynchronous communication is based on language-independent middleware services. Earlier we have presented the syntax and the semantics of both coordination languages. Practical experiences showed the difficulties of distributed program development, especially in testing and debugging. This paper aims to provide software comprehension application for a better understanding and usage of the D-Clean distributed system. We model the elements and the behaviour of the D-Clean system using C++ templates. The strong type system of C++ templates guarantees the correctness of the model. Using templates we can avoid run-time overhead achieving impressive efficiency.

  2. Temperature Effect on Micelle Formation: Molecular Thermodynamic Model Revisited.

    PubMed

    Khoshnood, Atefeh; Lukanov, Boris; Firoozabadi, Abbas

    2016-03-01

    Temperature affects the aggregation of macromolecules such as surfactants, polymers, and proteins in aqueous solutions. The effect on the critical micelle concentration (CMC) is often nonmonotonic. In this work, the effect of temperature on the micellization of ionic and nonionic surfactants in aqueous solutions is studied using a molecular thermodynamic model. Previous studies based on this technique have predicted monotonic behavior for ionic surfactants. Our investigation shows that the choice of tail transfer energy to describe the hydrophobic effect between the surfactant tails and the polar solvent molecules plays a key role in the predicted CMC. We modify the tail transfer energy by taking into account the effect of the surfactant head on the neighboring methylene group. The modification improves the description of the CMC and the predicted micellar size for aqueous solutions of sodium n-alkyl sulfate, dodecyl trimethylammonium bromide (DTAB), and n-alkyl polyoxyethylene. The new tail transfer energy describes the nonmonotonic behavior of CMC versus temperature. In the DTAB-water system, we redefine the head size by including the methylene group, next to the nitrogen, in the head. The change in the head size along with our modified tail transfer energy improves the CMC and aggregation size prediction significantly. Tail transfer is a dominant energy contribution in micellar and microemulsion systems. It also promotes the adsorption of surfactants at fluid-fluid interfaces and affects the formation of adsorbed layer at fluid-solid interfaces. Our proposed modifications have direct applications in the thermodynamic modeling of the effect of temperature on molecular aggregation, both in the bulk and at the interfaces. PMID:26854650

  3. Revisiting the carousel and non-radial oscillation models for pulsar B0809+74

    NASA Astrophysics Data System (ADS)

    Rankin, Joanna; Rosen, Rachel

    2014-04-01

    Recent interest in pulsar B0809+74, well known for its highly accurate drifting subpulses and `memory across nulls' has raised questions about the adequacy of the rotating subbeam-carousel or/and non-radial oscillation models to describe this phenomenon. The success of the subbeam-carousel model in explaining the drift modes and periodic nulls in B1918+19 has encouraged us to revisit the application of this model to B0809+74. Pulsar B0809+74 is a complicated object, as are many pulsars where our sightline grazes the conal beam edge obliquely. Its subpulses also exhibit complex modal polarization, and only analysing the total power paints an incomplete picture of emission from the star. This remarkable pulsar has, however, been studied in great detail for over three decades, and many of the earlier controversies about its characteristics have largely been resolved. In this paper, we demonstrate that the carousel model is highly successful in reproducing the behaviour of B0809+74 in every heuristic and geometric manner. In addition, Rosen and Demorest have quantitatively fitted a non-radial oscillation model to B0809+74 at a single frequency, and we discuss how this model can reproduce the behaviour of B0809+74 across a much larger band.

  4. Statistical Revisit to the Mike-Farmer Model: can this Model Capture the Stylized Facts in Real World Markets?

    NASA Astrophysics Data System (ADS)

    He, Ling-Yun; Wen, Xing-Chun

    2013-06-01

    According to current literature, the Mike-Farmer (MF) model1 is constructed empirically based on the continuous double auction mechanism in an order-driven market, which can successfully capture the diffusive behavior of stock prices at the transaction level. In our paper, we revisit the statistical properties of the generated series of prices based on the MF model to clarify whether it can reproduce the stylized facts in real world markets. However, the Detrended Fluctuation Analysis (DFA) scaling exponent of volatility Hv ≈ 0.6, which may be slightly lower than that in real markets; while a modified version of the MF model proposed by Gu and Zhou2 can improve the DFA scaling exponent of volatility Hv ≈ 0.75, which is closer to the empirical findings. Finally, we test the existence of another commonly found two stylized facts in the real world: the volatility clustering, and leverage effect.

  5. Revisiting Verhulst and Monod models: analysis of batch and fed-batch cultures.

    PubMed

    Shirsat, Nishikant; Mohd, Avesh; Whelan, Jessica; English, Niall J; Glennon, Brian; Al-Rubeai, Mohamed

    2015-05-01

    The paper re-evaluates Verhulst and Monod models. It has been claimed that standard logistic equation cannot describe the decline phase of mammalian cells in batch and fed-batch cultures and in some cases it fails to fit somatic growth data. In the present work Verhulst, population-based mechanistic growth model was revisited to describe successfully viable cell density (VCD) in exponential and decline phases of batch and fed-batch cultures of three different CHO cell lines. Verhulst model constants, K, carrying capacity (VCD/ml or μg/ml) and r, intrinsic growth factor (h(-1)) have physical meaning and they are of biological significance. These two parameters together define the course of growth and productivity and therefore, they are valuable in optimisation of culture media, developing feeding strategies and selection of cell lines for productivity. The Verhulst growth model approach was extended to develop productivity models for batch and fed-batch cultures. All Verhulst models were validated against blind data (R(2) > 0.95). Critical examination of theoretical approaches concluded that Monod parameters have no physical meaning. Monod-hybrid (pseudo-mechanistic) batch models were validated against specific growth rates of respective bolus and continuous fed-batch cultures (R(2) ≈ 0.90). The reduced form of Monod-hybrid model CL/(KL + CL) describes specific growth rate during metabolic shift (R(2) ≈ 0.95). Verhulst substrate-based growth models compared favourably with Monod-hybrid models. Thus, experimental evidence implies that the constants in the Monod-hybrid model may not have physical meaning but they behave similarly to the biological constants in Michaelis-Menten enzyme kinetics, the basis of the Monod growth model. PMID:25805268

  6. The Eating Attitudes Test-26 revisited using exploratory structural equation modeling.

    PubMed

    Maïano, Christophe; Morin, Alexandre J S; Lanfranchi, Marie-Christine; Therme, Pierre

    2013-07-01

    Most previous studies have failed to replicate the original factor structure of the 26-item version of the Eating Attitudes Test (EAT-26) among community samples of adolescents. The main objective of the present series of four studies (n = 2178) was to revisit the factor structure of this instrument among mixed gender community samples of adolescents using both exploratory structural equation modeling (ESEM) and confirmatory factor analysis (CFA). First, results from the ESEM analyses provided satisfactory goodness-of-fit statistics and reliability coefficients for a six-factor model of the EAT with 18 items (EAT-18) closely corresponding to the original seven-factor structure proposed for the 40-item version of the EAT. Second, these analyses were satisfactorily replicated among a new sample of community adolescents using CFA. The results confirmed the factor loading and intercept invariance of this model across gender and age groups (i.e., early and late adolescence), as well as the complete invariance of the EAT-18 measurement model between ethnicities (i.e., European versus African origins) and across weight categories (i.e., underweight, normal weight and overweight). Finally, the last study provided support for convergent validity of the EAT-18 with the Eating Disorder Inventory and with instruments measuring global self-esteem, physical appearance, social physique anxiety and fear of negative appearance evaluation. PMID:23344702

  7. Modelling crystal plasticity by 3D dislocation dynamics and the finite element method: The Discrete-Continuous Model revisited

    NASA Astrophysics Data System (ADS)

    Vattré, A.; Devincre, B.; Feyel, F.; Gatti, R.; Groh, S.; Jamond, O.; Roos, A.

    2014-02-01

    A unified model coupling 3D dislocation dynamics (DD) simulations with the finite element (FE) method is revisited. The so-called Discrete-Continuous Model (DCM) aims to predict plastic flow at the (sub-)micron length scale of materials with complex boundary conditions. The evolution of the dislocation microstructure and the short-range dislocation-dislocation interactions are calculated with a DD code. The long-range mechanical fields due to the dislocations are calculated by a FE code, taking into account the boundary conditions. The coupling procedure is based on eigenstrain theory, and the precise manner in which the plastic slip, i.e. the dislocation glide as calculated by the DD code, is transferred to the integration points of the FE mesh is described in full detail. Several test cases are presented, and the DCM is applied to plastic flow in a single-crystal Nickel-based superalloy.

  8. Revisiting the Slichter mode of Mercury in the context of differentiated models

    NASA Astrophysics Data System (ADS)

    Escapa, A.; Fukushima, T.

    2015-11-01

    We revisit the Slichter mode of a set of differentiated Mercury models that were considered previously. We apply a different and independent formalism, based on variational principles of mechanics, to analytically model the internal translations of a body with a global internal perfect fluid layer limited by two differentiated rigid solid constituents that have a spherical symmetric mass distribution. The Slichter mode is specified by providing the time evolution of the barycenters of the solid constituents, the amplitude ratio of the mantle to the inner core, and the period of the oscillatory motion. All these parameters only depend on the mass of the body, the mass of the inner core, the density of the fluid, and the mean density of the inner core. For previously developed Mercury models we find, in contrast to other results, that there are no discontinuities in the Slichter period when passing from undifferentiated to differentiated inner cores. Hence, in a general situation, a potential detection of the Slichter mode cannot determine the differentiation of the inner core. We also find that the BepiColombo mission may be able to detect the Slichter mode caused by an impactor meteroid with a mass of about 1012 kg in the most favorable of circumstances. This shows that a measurable excitation of the mode by this mechanism is even more unlikely than was previously established, where a mass about 1010 kg was found. Appendices are available in electronic form at http://www.aanda.org

  9. Revisiting Hartle's model using perturbed matching theory to second order: amending the change in mass

    NASA Astrophysics Data System (ADS)

    Reina, Borja; Vera, Raül

    2015-08-01

    Hartle's model describes the equilibrium configuration of a rotating isolated compact body in perturbation theory up to second order in general relativity. The interior of the body is a perfect fluid with a barotropic equation of state, no convective motions and rigid rotation. That interior is matched across its surface to an asymptotically flat vacuum exterior. Perturbations are taken to second order around a static and spherically symmetric background configuration. Apart from the explicit assumptions, the perturbed configuration is constructed upon some implicit premises, in particular the continuity of the functions describing the perturbation in terms of some background radial coordinate. In this work we revisit the model within a modern general and consistent theory of perturbative matchings to second order, which is independent of the coordinates and gauges used to describe the two regions to be joined. We explore the matching conditions up to second order in full. The main particular result we present is that the radial function m0 (in the setting of the original work) of the second order perturbation tensor, contrary to the original assumption, presents a jump at the surface of the star, which is proportional to the value of the energy density of the background configuration there. As a consequence, the change in mass δ M needed by the perturbed configuration to keep the value of the central energy density unchanged must be amended. We also discuss some subtleties that arise when studying the deformation of the star.

  10. Revisiting the global electroweak fit of the Standard Model and beyond with Gfitter

    NASA Astrophysics Data System (ADS)

    Flächer, H.; Goebel, M.; Haller, J.; Hoecker, A.; Mönig, K.; Stelzer, J.

    2009-04-01

    The global fit of the Standard Model to electroweak precision data, routinely performed by the LEP electroweak working group and others, demonstrated impressively the predictive power of electroweak unification and quantum loop corrections. We have revisited this fit in view of (i) the development of the new generic fitting package, Gfitter, allowing for flexible and efficient model testing in high-energy physics, (ii) the insertion of constraints from direct Higgs searches at LEP and the Tevatron, and (iii) a more thorough statistical interpretation of the results. Gfitter is a modular fitting toolkit, which features predictive theoretical models as independent plug-ins, and a statistical analysis of the fit results using toy Monte Carlo techniques. The state-of-the-art electroweak Standard Model is fully implemented, as well as generic extensions to it. Theoretical uncertainties are explicitly included in the fit through scale parameters varying within given error ranges. This paper introduces the Gfitter project, and presents state-of-the-art results for the global electroweak fit in the Standard Model (SM), and for a model with an extended Higgs sector (2HDM). Numerical and graphical results for fits with and without including the constraints from the direct Higgs searches at LEP and Tevatron are given. Perspectives for future colliders are analysed and discussed. In the SM fit including the direct Higgs searches, we find M H =116.4{-1.3/+18.3} GeV, and the 2 σ and 3 σ allowed regions [114,145] GeV and [[113,168] and [180,225

  11. Revisited reaction-diffusion model of thermal desorption spectroscopy experiments on hydrogen retention in material

    NASA Astrophysics Data System (ADS)

    Guterl, Jerome; Smirnov, R. D.; Krasheninnikov, S. I.

    2015-07-01

    Desorption phase of thermal desorption spectroscopy (TDS) experiments performed on tungsten samples exposed to flux of hydrogen isotopes in fusion relevant conditions is analyzed using a reaction-diffusion model describing hydrogen retention in material bulk. Two regimes of hydrogen desorption are identified depending on whether hydrogen trapping rate is faster than hydrogen diffusion rate in material during TDS experiments. In both regimes, a majority of hydrogen released from material defects is immediately outgassed instead of diffusing deeply in material bulk when the evolution of hydrogen concentration in material is quasi-static, which is the case during TDS experiments performed with tungsten samples exposed to flux of hydrogen isotopes in fusion related conditions. In this context, analytical expressions of the hydrogen outgassing flux as a function of the material temperature are obtained with sufficient accuracy to describe main features of thermal desorption spectra (TDSP). These expressions are then used to highlight how characteristic temperatures of TDSP depend on hydrogen retention parameters, such as trap concentration or activation energy of detrapping processes. The use of Arrhenius plots to characterize retention processes is then revisited when hydrogen trapping takes place during TDS experiments. Retention processes are also characterized using the shape of desorption peaks in TDSP, and it is shown that diffusion of hydrogen in material during TDS experiment can induce long desorption tails visible aside desorption peaks at high temperature in TDSP. These desorption tails can be used to estimate activation energy of diffusion of hydrogen in material.

  12. Revisiting the monopole components of effective interactions for the shell model

    NASA Astrophysics Data System (ADS)

    Wang, X. B.; Dong, G. X.

    2015-12-01

    In this paper, we revisit the monopole components of effective interactions for the shell model. Without going through specific nuclei or shell gaps, universal roles of central, tensor, and spin-orbit forces can be proved, reflecting the intrinsic features of shell model effective interactions. For monopole matrix elements, even and odd channels of central force often have a canceling effect. However, for the contributions to the shell evolution, its even and odd channels could have both positive or negative contributions, enhancing the role of central force on the shell structure. Tensor force is generally weaker than central force. However, for the effect on shell evolutions, tensor force can dominate or play a competitive role. A different systematics has been discovered between T = 1 and 0 channels. For example, tensor force, well established in the T = 0 channel, becomes uncertain in the T = 1 channel. We calculate the properties of neutron-rich oxygen and calcium isotopes in order to study T = 1 channel interactions further. It is learned that the main improvements of empirical interactions are traced to the central force. For non-central forces, antisymmetric spin-orbit (ALS) force, originated from many-body perturbations or three-body force, could also play an explicit role. T = 1 tensor forces are less constrained so their effect can differ in different empirical interactions. The influence of tensor force may sometimes be canceled by many-body effects. For T = 0 channels of effective interactions, which is the main source of neutron-proton correlations, central and tensor forces are the leading components. For T = 1 channels, which can act between like-particles, the request for many-body correlations could be more demanding, so that the monopole anomaly of the T = 1 channel might be more serious.

  13. Making Productive Use of Four Models of School English: A Case Study Revisited

    ERIC Educational Resources Information Center

    Macken-Horarik, Mary

    2014-01-01

    At a time when political leaders and media pundits seek to narrow the English curriculum and reduce its knowledge structure to the "basics," it is helpful to revisit the potential of different approaches to learning in English that have evolved over time. In this paper I reflect on the semantic features of personal growth, cultural…

  14. Minimal Model of Plankton Systems Revisited with Spatial Diffusion and Maturation Delay.

    PubMed

    Zhao, Jiantao; Tian, Jianjun Paul; Wei, Junjie

    2016-03-01

    This study revisits the minimal model for a plankton ecosystem proposed by Scheffer with spatial diffusion of plankton and the delay of the maturation period of herbivorous zooplankton. It deepens our understanding of effects of the nutrients and the predation of fish upon zooplankton on the dynamical patterns of the plankton system and also presents new phenomena induced by the delay with spatial diffusion. When the nutrient level is sufficient low, the zooplankton population collapses and the phytoplankton population reaches its carrying capacity. Mathematically, the global stability of the boundary equilibrium is proved. As the nutrient level increases, the system switches to coexistent equilibria or oscillations depending on the maturation period of zooplankton and the predation rate of fish on herbivorous zooplankton. Under an eutrophic condition, there is a unique coexistent homogeneous equilibrium, and the equilibrium density of phytoplankton increases, while the equilibrium density of herbivorous zooplankton decreases as the fish predation rate on herbivorous zooplankton is increasing. The study shows that the system will never collapses under the eutrophic condition unless the fish predation rate approaches infinite. The study also finds a functional bifurcation relation between the delay parameter of the maturation period of herbivorous zooplankton and the fish predation rate on herbivorous zooplankton that, above a critical value of the fish predation rate, the system stays at the coexistent equilibrium, and below that value, the system switches its dynamical patterns among stable and unstable equilibria and oscillations. The oscillations emerge from Hopf bifurcations, and a detailed mathematical analysis about the Hopf bifurcations is carried out to give relevant ecological predications. PMID:26934887

  15. Disappearing Scales in Carps: Re-Visiting Kirpichnikov's Model on the Genetics of Scale Pattern Formation

    PubMed Central

    Goh, Chin Heng; Kathiresan, Purushothaman; Németh, Sándor; Jeney, Zsigmond; Bercsényi, Miklós; Orbán, László

    2013-01-01

    The body of most fishes is fully covered by scales that typically form tight, partially overlapping rows. While some of the genes controlling the formation and growth of fish scales have been studied, very little is known about the genetic mechanisms regulating scale pattern formation. Although the existence of two genes with two pairs of alleles (S&s and N&n) regulating scale coverage in cyprinids has been predicted by Kirpichnikov and colleagues nearly eighty years ago, their identity was unknown until recently. In 2009, the ‘S’ gene was found to be a paralog of fibroblast growth factor receptor 1, fgfr1a1, while the second gene called ‘N’ has not yet been identified. We re-visited the original model of Kirpichnikov that proposed four major scale pattern types and observed a high degree of variation within the so-called scattered phenotype due to which this group was divided into two sub-types: classical mirror and irregular. We also analyzed the survival rates of offspring groups and found a distinct difference between Asian and European crosses. Whereas nude × nude crosses involving at least one parent of Asian origin or hybrid with Asian parent(s) showed the 25% early lethality predicted by Kirpichnikov (due to the lethality of the NN genotype), those with two Hungarian nude parents did not. We further extended Kirpichnikov's work by correlating changes in phenotype (scale-pattern) to the deformations of fins and losses of pharyngeal teeth. We observed phenotypic changes which were not restricted to nudes, as described by Kirpichnikov, but were also present in mirrors (and presumably in linears as well; not analyzed in detail here). We propose that the gradation of phenotypes observed within the scattered group is caused by a gradually decreasing level of signaling (a dose-dependent effect) probably due to a concerted action of multiple pathways involved in scale formation. PMID:24386179

  16. Disappearing scales in carps: re-visiting Kirpichnikov's model on the genetics of scale pattern formation.

    PubMed

    Casas, Laura; Szűcs, Réka; Vij, Shubha; Goh, Chin Heng; Kathiresan, Purushothaman; Németh, Sándor; Jeney, Zsigmond; Bercsényi, Miklós; Orbán, László

    2013-01-01

    The body of most fishes is fully covered by scales that typically form tight, partially overlapping rows. While some of the genes controlling the formation and growth of fish scales have been studied, very little is known about the genetic mechanisms regulating scale pattern formation. Although the existence of two genes with two pairs of alleles (S&s and N&n) regulating scale coverage in cyprinids has been predicted by Kirpichnikov and colleagues nearly eighty years ago, their identity was unknown until recently. In 2009, the 'S' gene was found to be a paralog of fibroblast growth factor receptor 1, fgfr1a1, while the second gene called 'N' has not yet been identified. We re-visited the original model of Kirpichnikov that proposed four major scale pattern types and observed a high degree of variation within the so-called scattered phenotype due to which this group was divided into two sub-types: classical mirror and irregular. We also analyzed the survival rates of offspring groups and found a distinct difference between Asian and European crosses. Whereas nude × nude crosses involving at least one parent of Asian origin or hybrid with Asian parent(s) showed the 25% early lethality predicted by Kirpichnikov (due to the lethality of the NN genotype), those with two Hungarian nude parents did not. We further extended Kirpichnikov's work by correlating changes in phenotype (scale-pattern) to the deformations of fins and losses of pharyngeal teeth. We observed phenotypic changes which were not restricted to nudes, as described by Kirpichnikov, but were also present in mirrors (and presumably in linears as well; not analyzed in detail here). We propose that the gradation of phenotypes observed within the scattered group is caused by a gradually decreasing level of signaling (a dose-dependent effect) probably due to a concerted action of multiple pathways involved in scale formation. PMID:24386179

  17. Lakatos Revisited.

    ERIC Educational Resources Information Center

    Court, Deborah

    1999-01-01

    Revisits and reviews Imre Lakatos' ideas on "Falsification and the Methodology of Scientific Research Programmes." Suggests that Lakatos' framework offers an insightful way of looking at the relationship between theory and research that is relevant not only for evaluating research programs in theoretical physics, but in the social sciences as…

  18. Modeling Anti-HIV Activity of HEPT Derivatives Revisited. Multiregression Models Are Not Inferior Ones

    SciTech Connect

    Basic, Ivan; Nadramija, Damir; Flajslik, Mario; Amic, Dragan; Lucic, Bono

    2007-12-26

    Several quantitative structure-activity studies for this data set containing 107 HEPT derivatives have been performed since 1997, using the same set of molecules by (more or less) different classes of molecular descriptors. Multivariate Regression (MR) and Artificial Neural Network (ANN) models were developed and in each study the authors concluded that ANN models are superior to MR ones. We re-calculated multivariate regression models for this set of molecules using the same set of descriptors, and compared our results with the previous ones. Two main reasons for overestimation of the quality of the ANN models in previous studies comparing with MR models are: (1) wrong calculation of leave-one-out (LOO) cross-validated (CV) correlation coefficient for MR models in Luco et al., J. Chem. Inf. Comput. Sci. 37 392-401 (1997), and (2) incorrect estimation/interpretation of leave-one-out (LOO) cross-validated and predictive performance and power of ANN models. More precise and fairer comparison of fit and LOO CV statistical parameters shows that MR models are more stable. In addition, MR models are much simpler than ANN ones. For real testing the predictive performance of both classes of models we need more HEPT derivatives, because all ANN models that presented results for external set of molecules used experimental values in optimization of modeling procedure and model parameters.

  19. SeaRISE experiment revisited: sources of spread in multi-model projections of the Greenland ice-sheet

    NASA Astrophysics Data System (ADS)

    Saito, F.; Abe-Ouchi, A.; Takahashi, K.; Blatter, H.

    2015-02-01

    The present paper revisits the future surface-climate experiments of the Greenland ice-sheet proposed by the Sea-level Response to Ice Sheet Evolution (SeaRISE, Bindschadler et al., 2013) study. The projections of the different SeaRISE participants show diversion, which has not been examined in detail to date. A series of sensitivity experiments are conducted and analyzed using the Ice-sheet model for Integrated Earth-system Studies (IcIES) by replacing one or more formulations of the model parameters with those adopted in other model(s). The results show that the main sources of the diversion between the projections of the different SeaRISE participants are differences in the initialization methods and in the surface mass balance methods, and both aspects have almost equal impact on the results. Treatment of ice-sheet margins in the simulation has a secondary impact on the diversion. We conclude that spinning-up the model using fixed topography through the spin-up period while the temperature is allowed to evolve according to the surface temperature history is the preferred representation at least for the experiment configuration examined in the present paper. A benchmark model experiment set-up that most of the numerical model can perform is proposed for future intercomparison projects, in order to evaluate the uncertainties relating to pure ice-sheet model flow characteristics.

  20. SeaRISE experiments revisited: potential sources of spread in multi-model projections of the Greenland ice sheet

    NASA Astrophysics Data System (ADS)

    Saito, F.; Abe-Ouchi, A.; Takahashi, K.; Blatter, H.

    2016-01-01

    The present paper revisits the future surface-climate experiments on the Greenland ice sheet proposed by the Sea-level Response to Ice Sheet Evolution (SeaRISE; Bindschadler et al., 2013) study. The projections of the different SeaRISE participants show dispersion, which has not been examined in detail to date. A series of sensitivity experiments are conducted and analyzed using the ice-sheet model for integrated Earth-system studies (IcIES) by replacing one or more formulations of the model parameters with those adopted in other model(s). The results show that large potential sources of the dispersion among the projections of the different SeaRISE participants are differences in the initialization methods and in the surface mass balance methods, and both aspects have almost equal impact on the results. The treatment of ice-sheet margins in the simulation has a secondary impact on the dispersion. We conclude that spinning up the model using fixed topography through the spin-up period while the temperature is allowed to evolve according to the surface temperature history is the preferred representation, at least for the experiment configuration examined in the present paper. A benchmark model experimental setup that most of the numerical models can perform is proposed for future intercomparison projects, in order to evaluate the uncertainties relating to pure ice-sheet model flow characteristics.

  1. Parameter conversion from Kedem-Katchalsky model to two-parameter model revisited.

    PubMed

    Ren, J; Zhao, G

    2013-01-01

    Successful cryopreservation needs to avoid osmotic injury during the addition and removal of cryoprotective agents. The Kedem-Katchalsky model (KK) and more recently the two-parameter model (2P) are applied to study the volumetric responses of cells for process optimization. The difference between two models is the presence of the reflection coefficient (h) in the KK model. Earlier studies found that the inclusion of t is unnecessary and in some cases may lead to conceptual errors when the model is applied cell membranes. Since the 2P model is accurate and simple to use, Chuenkhum et al. had derived the numerical values of 2P parameters for many cell types from KK parameters. We noted, however, that the calculation of Chuenkhum et al. needs further verification because they did not take into consideration of the original experimental conditions in their simulations. The present paper presents the corrected dataset for many cell types. PMID:23995408

  2. Revisiting Runoff Model Calibration: Airborne Snow Observatory Results Allow Improved Modeling Results

    NASA Astrophysics Data System (ADS)

    McGurk, B. J.; Painter, T. H.

    2014-12-01

    Deterministic snow accumulation and ablation simulation models are widely used by runoff managers throughout the world to predict runoff quantities and timing. Model fitting is typically based on matching modeled runoff volumes and timing with observed flow time series at a few points in the basin. In recent decades, sparse networks of point measurements of the mountain snowpacks have been available to compare with modeled snowpack, but the comparability of results from a snow sensor or course to model polygons of 5 to 50 sq. km is suspect. However, snowpack extent, depth, and derived snow water equivalent have been produced by the NASA/JPL Airborne Snow Observatory (ASO) mission for spring of 20013 and 2014 in the Tuolumne River basin above Hetch Hetchy Reservoir. These high-resolution snowpack data have exposed the weakness in a model calibration based on runoff alone. The U.S. Geological Survey's Precipitation Runoff Modeling System (PRMS) calibration that was based on 30-years of inflow to Hetch Hetchy produces reasonable inflow results, but modeled spatial snowpack location and water quantity diverged significantly from the weekly measurements made by ASO during the two ablation seasons. The reason is that the PRMS model has many flow paths, storages, and water transfer equations, and a calibrated outflow time series can be right for many wrong reasons. The addition of a detailed knowledge of snow extent and water content constrains the model so that it is a better representation of the actual watershed hydrology. The mechanics of recalibrating PRMS to the ASO measurements will be described, and comparisons in observed versus modeled flow for both a small subbasin and the entire Hetch Hetchy basin will be shown. The recalibrated model provided a bitter fit to the snowmelt recession, a key factor for water managers as they balance declining inflows with demand for power generation and ecosystem releases during the final months of snow melt runoff.

  3. Benzophenone Ultrafast Triplet Population: Revisiting the Kinetic Model by Surface-Hopping Dynamics

    PubMed Central

    2016-01-01

    The photochemistry of benzophenone, a paradigmatic organic molecule for photosensitization, was investigated by means of surface-hopping ab initio molecular dynamics. Different mechanisms were found to be relevant within the first 600 fs after excitation; the long-debated direct (S1 → T1) and indirect (S1 → T2 → T1) mechanisms for population of the low-lying triplet state are both possible, with the latter being prevalent. Moreover, we established the existence of a kinetic equilibrium between the two triplet states, never observed before. This fact implies that a significant fraction of the overall population resides in T2, eventually allowing one to revisit the usual spectroscopic assignment proposed by transient absorption spectroscopy. This finding is of particular interest for photocatalysis as well as for DNA damages studies because both T1 and T2 channels are, in principle, available for benzophenone-mediated photoinduced energy transfer toward DNA. PMID:26821061

  4. Benzophenone Ultrafast Triplet Population: Revisiting the Kinetic Model by Surface-Hopping Dynamics.

    PubMed

    Marazzi, Marco; Mai, Sebastian; Roca-Sanjun, Daniel; Delcey, Mickal G; Lindh, Roland; Gonzlez, Leticia; Monari, Antonio

    2016-02-18

    The photochemistry of benzophenone, a paradigmatic organic molecule for photosensitization, was investigated by means of surface-hopping ab initio molecular dynamics. Different mechanisms were found to be relevant within the first 600 fs after excitation; the long-debated direct (S1 ? T1) and indirect (S1 ? T2 ? T1) mechanisms for population of the low-lying triplet state are both possible, with the latter being prevalent. Moreover, we established the existence of a kinetic equilibrium between the two triplet states, never observed before. This fact implies that a significant fraction of the overall population resides in T2, eventually allowing one to revisit the usual spectroscopic assignment proposed by transient absorption spectroscopy. This finding is of particular interest for photocatalysis as well as for DNA damages studies because both T1 and T2 channels are, in principle, available for benzophenone-mediated photoinduced energy transfer toward DNA. PMID:26821061

  5. Revisiting a model of ontogenetic growth: estimating model parameters from theory and data.

    PubMed

    Moses, Melanie E; Hou, Chen; Woodruff, William H; West, Geoffrey B; Nekola, Jeffery C; Zuo, Wenyun; Brown, James H

    2008-05-01

    The ontogenetic growth model (OGM) of West et al. provides a general description of how metabolic energy is allocated between production of new biomass and maintenance of existing biomass during ontogeny. Here, we reexamine the OGM, make some minor modifications and corrections, and further evaluate its ability to account for empirical variation on rates of metabolism and biomass in vertebrates both during ontogeny and across species of varying adult body size. We show that the updated version of the model is internally consistent and is consistent with other predictions of metabolic scaling theory and empirical data. The OGM predicts not only the near universal sigmoidal form of growth curves but also the M(1/4) scaling of the characteristic times of ontogenetic stages in addition to the curvilinear decline in growth efficiency described by Brody. Additionally, the OGM relates the M(3/4) scaling across adults of different species to the scaling of metabolic rate across ontogeny within species. In providing a simple, quantitative description of how energy is allocated to growth, the OGM calls attention to unexplained variation, unanswered questions, and opportunities for future research. PMID:18419571

  6. Bottomonium spectrum revisited

    NASA Astrophysics Data System (ADS)

    Segovia, Jorge; Ortega, Pablo G.; Entem, David R.; Fernández, Francisco

    2016-04-01

    We revisit the bottomonium spectrum motivated by the recently exciting experimental progress in the observation of new bottomonium states, both conventional and unconventional. Our framework is a nonrelativistic constituent quark model which has been applied to a wide range of hadronic observables from the light to the heavy quark sector, and thus the model parameters are completely constrained. Beyond the spectrum, we provide a large number of electromagnetic, strong and hadronic decays in order to discuss the quark content of the bottomonium states and give more insights about a better way to determine their properties experimentally.

  7. The population genetics of Trypanosoma cruzi revisited in the light of the predominant clonal evolution model.

    PubMed

    Tibayrenc, Michel; Ayala, Francisco J

    2015-11-01

    Comparing the population structure of Trypanosoma cruzi with that of other pathogens, including parasitic protozoa, fungi, bacteria and viruses, shows that the agent of Chagas disease shares typical traits with many other species, related to a predominant clonal evolution (PCE) pattern: statistically significant linkage disequilibrium, overrepresented multilocus genotypes, near-clades (genetic subdivisions somewhat blurred by occasional genetic exchange/hybridization) and "Russian doll" patterns (PCE is observed, not only at the level of the whole species, but also, within the near-clades). Moreover, T. cruzi population structure exhibits linkage with the diversity of several strongly selected genes, with gene expression profiles, and with some major phenotypic traits. We discuss the evolutionary significance of these results, and their implications in terms of applied research (molecular epidemiology/strain typing, analysis of genes of interest, vaccine and drug design, immunological diagnosis) and of experimental evolution. Lastly, we revisit the long-term debate of describing new species within the T. cruzi taxon. PMID:26188332

  8. Revisiting reaction-diffusion model of thermal desorption spectroscopy experiments on hydrogen retention in material for fusion applications

    NASA Astrophysics Data System (ADS)

    Guterl, Jerome; Smirnov, Roman; Krasheninnikov, Sergei

    2015-11-01

    Plasma-material interactions may strongly influence plasma performance and life-time of future magnetic fusion devices. Understanding the multifaceted physics of hydrogen retention in plasma-facing components (PFC) is thus crucial, but remains challenging due to the wide spectrum of retention processes on PFC surface and in PFC bulk induced by long-time exposure of PFC to high flux of energy and particles. We revisit here some aspects of reaction-diffusion models used to investigate hydrogen retention in material. We focus on analysis of thermal desorption spectroscopy (TDS) experiment considering only one type of traps in material and first neglecting surface effects. We show that solute hydrogen concentration in retention region usually remains in equilibrium during TDS experiments. In this regime, analytic description of thermal desorption spectra indicates that trapping of solute hydrogen during TDS cannot be ignored. Main features of thermal desorption are then analytically described and refined interpretation of Arrhenius plots is proposed. Effects of surface processes on hydrogen outgassing during TDS experiments are then introduced and surface-limited outgassing regimes are discussed.

  9. Revisiting B_s rightarrow μ ^+μ ^- in the two-Higgs doublet models with Z_2 symmetry

    NASA Astrophysics Data System (ADS)

    Cheng, Xiao-Dong; Yang, Ya-Dong; Yuan, Xing-Bo

    2016-03-01

    We revisit the rare leptonic decay B_s rightarrow μ ^+ μ ^- in the two-Higgs doublet models (2HDMs) with a softly broken Z_2 symmetry, namely type-I, type-II, type-X and type-Y 2HDMs. We have derived the relevant full one-loop Wilson coefficients of the four 2HDMs from the recent calculation in the aligned 2HDM by Li, Lu and Pich, which could be mapped to all the four 2HDMs for both large and small tan β . It is found that a new term associated with the soft Z_2 symmetry breaking parameter M can be enhanced by tan ^2β in the type-II 2HDM, which has not been considered in the literature. Imposing both theoretical and experimental constraints, we have renewed the bounds on the parameter spaces of the four 2HDMs. Different from our previous paper, however, we find that all the four 2HDMs give sizable and similar contributions to overline{B}(B_s rightarrow μ ^+ μ ^-) within the stringently restricted parameter spaces, but very tiny as regards the mass-eigenstate rate asymmetry A_{Δ Γ }; this makes it unfeasible to discriminate the four types of 2HDM with the correlations between the observables in B_s rightarrow μ ^+ μ ^- decay.

  10. Ups and Downs of Viagra: Revisiting Ototoxicity in the Mouse Model

    PubMed Central

    Au, Adrian; Stuyt, John Gerka; Chen, Daniel; Alagramam, Kumar

    2013-01-01

    Sildenafil citrate (Viagra), a phosphodiesterase 5 inhibitor (PDE5i), is a commonly prescribed drug for erectile dysfunction. Since the introduction of Viagra in 1997, several case reports have linked Viagra to sudden sensorineural hearing loss. However, these studies are not well controlled for confounding factors, such as age and noise-induced hearing loss and none of these reports are based on prospective double-blind studies. Further, animal studies report contradictory data. For example, one study (2008) reported hearing loss in rats after long-term and high-dose exposure to sildenafil citrate. The other study (2012) showed vardenafil, another formulation of PDE5i, to be protective against noise-induced hearing loss in mice and rats. Whether or not clinically relevant doses of sildenafil citrate cause hearing loss in normal subjects (animals or humans) is controversial. One possibility is that PDE5i exacerbates age-related susceptibility to hearing loss in adults. Therefore, we tested sildenafil citrate in C57BL/6J, a strain of mice that displays increased susceptibility to age-related hearing loss, and compared the results to those obtained from the FVB/N, a strain of mice with no predisposition to hearing loss. Six-week-old mice were injected with the maximum tolerated dose of sildenafil citrate (10 mg/kg/day) or saline for 30 days. Auditory brainstem responses (ABRs) were recorded pre- and post injection time points to assess hearing loss. Entry of sildenafil citrate in the mouse cochlea was confirmed by qRT-PCR analysis of a downstream target of the cGMP-PKG cascade. ABR data indicated no statistically significant difference in hearing between treated and untreated mice in both backgrounds. Results show that the maximum tolerated dose of sildenafil citrate administered daily for 4 weeks does not affect hearing in the mouse. Our study gives no indication that Viagra will negatively impact hearing and it emphasizes the need to revisit the issue of Viagra related ototoxicity in humans. PMID:24244454

  11. Revisiting single photon avalanche diode current-voltage modeling and transient characteristics

    SciTech Connect

    Javitt, M.; Savuskan, V. Merhav, T.; Nemirovsky, Y.

    2014-05-28

    A model for the current-voltage and transient behavior of Single Photon Avalanche Diodes (SPADs) based on device physics is presented. The results of the model are compared to actual measurements and a reasonable fit is seen. Additionally, the model provides a useful tool for designing quenching circuitry and determining optimal operation conditions of the SPAD.

  12. Revisiting Fixed- and Random-Effects Models: Some Considerations for Policy-Relevant Education Research

    ERIC Educational Resources Information Center

    Clarke, Paul; Crawford, Claire; Steele, Fiona; Vignoles, Anna

    2015-01-01

    The use of fixed (FE) and random effects (RE) in two-level hierarchical linear regression is discussed in the context of education research. We compare the robustness of FE models with the modelling flexibility and potential efficiency of those from RE models. We argue that the two should be seen as complementary approaches. We then compare both…

  13. Revisiting a Statistical Shortcoming When Fitting the Langmuir Model to Sorption Data

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The Langmuir model is commonly used for describing sorption behavior of reactive solutes to surfaces. Fitting the Langmuir model to sorption data requires either the use of nonlinear regression or, alternatively, linear regression using one of the linearized versions of the model. Statistical limit...

  14. Re-visiting projections of PCBs in Lower Hudson River fish using model emulation.

    PubMed

    Field, L Jay; Kern, John W; Rosman, Lisa B

    2016-07-01

    Remedial decision making at large contaminated sediment sites with bioaccumulative contaminants often relies on complex mechanistic models to forecast future concentrations and compare remedial alternatives. Remedial decision-making for the Hudson River PCBs Superfund site involved predictions of future levels of PCBs in Upper Hudson River (UHR) and Lower Hudson River (LHR) fish. This study applied model emulation to evaluate the impact of updated sediment concentrations on the original mechanistic model projections of time to reach risk-based target thresholds in fish in the LHR under Monitored Natural Attenuation (MNA) and the selected dredging remedy. The model emulation approach used a combination of nonlinear and linear regression models to estimate UHR water PCBs as a function of UHR sediment PCBs and to estimate fish concentrations in the LHR as a function of UHR water PCBs, respectively. Model emulation captured temporal changes in sediment, water, and fish PCBs predicted by the mechanistic model over the emulation period. The emulated model, using updated sediment concentrations and a revised estimate of recovery rate, matched the trend in annual monitoring data for white perch and largemouth bass in the LHR between 1997 and 2014. Our best predictions based on the emulated model indicate that the projected time to reach fish tissue risk-based thresholds in the LHR will take decades longer than the original mechanistic model projections. PMID:27017079

  15. Revisiting Gaussian Process Regression Modeling for Localization in Wireless Sensor Networks.

    PubMed

    Richter, Philipp; Toledano-Ayala, Manuel

    2015-01-01

    Signal strength-based positioning in wireless sensor networks is a key technology for seamless, ubiquitous localization, especially in areas where Global Navigation Satellite System (GNSS) signals propagate poorly. To enable wireless local area network (WLAN) location fingerprinting in larger areas while maintaining accuracy, methods to reduce the effort of radio map creation must be consolidated and automatized. Gaussian process regression has been applied to overcome this issue, also with auspicious results, but the fit of the model was never thoroughly assessed. Instead, most studies trained a readily available model, relying on the zero mean and squared exponential covariance function, without further scrutinization. This paper studies the Gaussian process regression model selection for WLAN fingerprinting in indoor and outdoor environments. We train several models for indoor/outdoor- and combined areas; we evaluate them quantitatively and compare them by means of adequate model measures, hence assessing the fit of these models directly. To illuminate the quality of the model fit, the residuals of the proposed model are investigated, as well. Comparative experiments on the positioning performance verify and conclude the model selection. In this way, we show that the standard model is not the most appropriate, discuss alternatives and present our best candidate. PMID:26370996

  16. Revisiting Gaussian Process Regression Modeling for Localization in Wireless Sensor Networks

    PubMed Central

    Richter, Philipp; Toledano-Ayala, Manuel

    2015-01-01

    Signal strength-based positioning in wireless sensor networks is a key technology for seamless, ubiquitous localization, especially in areas where Global Navigation Satellite System (GNSS) signals propagate poorly. To enable wireless local area network (WLAN) location fingerprinting in larger areas while maintaining accuracy, methods to reduce the effort of radio map creation must be consolidated and automatized. Gaussian process regression has been applied to overcome this issue, also with auspicious results, but the fit of the model was never thoroughly assessed. Instead, most studies trained a readily available model, relying on the zero mean and squared exponential covariance function, without further scrutinization. This paper studies the Gaussian process regression model selection for WLAN fingerprinting in indoor and outdoor environments. We train several models for indoor/outdoor- and combined areas; we evaluate them quantitatively and compare them by means of adequate model measures, hence assessing the fit of these models directly. To illuminate the quality of the model fit, the residuals of the proposed model are investigated, as well. Comparative experiments on the positioning performance verify and conclude the model selection. In this way, we show that the standard model is not the most appropriate, discuss alternatives and present our best candidate. PMID:26370996

  17. Revisiting the Model of Creative Destruction: St. Jacobs, Ontario, a Decade Later

    ERIC Educational Resources Information Center

    Mitchell, Clare J. A.; de Waal, Sarah B.

    2009-01-01

    Ten years ago, the model of creative destruction was developed to predict the fate of communities that base their development on the commodification of rural heritage (Mitchell, C.J.A., 1998. Entrepreneurialism, commodification and creative destruction: a model of post-modern community development. Journal of Rural Studies 14, 273-286). Its

  18. Revisiting the Model of Creative Destruction: St. Jacobs, Ontario, a Decade Later

    ERIC Educational Resources Information Center

    Mitchell, Clare J. A.; de Waal, Sarah B.

    2009-01-01

    Ten years ago, the model of creative destruction was developed to predict the fate of communities that base their development on the commodification of rural heritage (Mitchell, C.J.A., 1998. Entrepreneurialism, commodification and creative destruction: a model of post-modern community development. Journal of Rural Studies 14, 273-286). Its…

  19. The Two-Capacitor Problem Revisited: A Mechanical Harmonic Oscillator Model Approach

    ERIC Educational Resources Information Center

    Lee, Keeyung

    2009-01-01

    The well-known two-capacitor problem, in which exactly half the stored energy disappears when a charged capacitor is connected to an identical capacitor, is discussed based on the mechanical harmonic oscillator model approach. In the mechanical harmonic oscillator model, it is shown first that "exactly half" the work done by a constant applied…

  20. Modeling the Information-Seeking Behavior of Social Scientists: Ellis's Study Revisited.

    ERIC Educational Resources Information Center

    Meho, Lokman I.; Tibbo, Helen R.

    2003-01-01

    Revises David Ellis's information-seeking behavior model of social scientists which includes six generic features: starting, chaining, browsing, differentiating, monitoring, and extracting. Suggests four new features be added: accessing, networking, verifying, and information managing; and describes a new model that includes searching, accessing,…

  1. The Two-Capacitor Problem Revisited: A Mechanical Harmonic Oscillator Model Approach

    ERIC Educational Resources Information Center

    Lee, Keeyung

    2009-01-01

    The well-known two-capacitor problem, in which exactly half the stored energy disappears when a charged capacitor is connected to an identical capacitor, is discussed based on the mechanical harmonic oscillator model approach. In the mechanical harmonic oscillator model, it is shown first that "exactly half" the work done by a constant applied

  2. Gill's model of the Antarctic Circumpolar Current, revisited: The role of latitudinal variations in wind stress

    NASA Astrophysics Data System (ADS)

    Marshall, David P.; Munday, David R.; Allison, Lesley C.; Hay, Russell J.; Johnson, Helen L.

    2016-01-01

    Gill's (1968) model of the Antarctic Circumpolar Current (ACC) is reinterpreted for a stratified, reduced-gravity ocean, where the barotropic streamfunction is replaced by the pycnocline depth, and the bottom drag coefficient by the Gent and McWilliams eddy diffusivity. The resultant model gives a simple description of the lateral structure of the ACC that is consistent with contemporary descriptions of ACC dynamics. The model is used to investigate and interpret the sensitivity of the ACC to the latitudinal profile of the surface wind stress. A substantial ACC remains when the wind jet is shifted north of the model Drake Passage, even by several thousand kilometers. The integral of the wind stress over the circumpolar streamlines is found to be a useful predictor of the magnitude of the volume transport through the model Drake Passage, although it is necessary to correct for basin-wide zonal pressure gradients in order to obtain good quantitative agreement.

  3. Revisiting node-based SIR models in complex networks with degree correlations

    NASA Astrophysics Data System (ADS)

    Wang, Yi; Cao, Jinde; Alofi, Abdulaziz; AL-Mazrooei, Abdullah; Elaiw, Ahmed

    2015-11-01

    In this paper, we consider two growing networks which will lead to the degree-degree correlations between two nearest neighbors in the network. When the network grows to some certain size, we introduce an SIR-like disease such as pandemic influenza H1N1/09 to the population. Due to its rapid spread, the population size changes slowly, and thus the disease spreads on correlated networks with approximately fixed size. To predict the disease evolution on correlated networks, we first review two node-based SIR models incorporating degree correlations and an edge-based SIR model without considering degree correlation, and then compare the predictions of these models with stochastic SIR simulations, respectively. We find that the edge-based model, even without considering degree correlations, agrees much better than the node-based models incorporating degree correlations with stochastic SIR simulations in many respects. Moreover, simulation results show that for networks with positive correlation, the edge-based model provides a better upper bound of the cumulative incidence than the node-based SIR models, whereas for networks with negative correlation, it provides a lower bound of the cumulative incidence.

  4. BrainSignals Revisited: Simplifying a Computational Model of Cerebral Physiology

    PubMed Central

    Caldwell, Matthew; Hapuarachchi, Tharindi; Highton, David; Elwell, Clare; Smith, Martin; Tachtsidis, Ilias

    2015-01-01

    Multimodal monitoring of brain state is important both for the investigation of healthy cerebral physiology and to inform clinical decision making in conditions of injury and disease. Near-infrared spectroscopy is an instrument modality that allows non-invasive measurement of several physiological variables of clinical interest, notably haemoglobin oxygenation and the redox state of the metabolic enzyme cytochrome c oxidase. Interpreting such measurements requires the integration of multiple signals from different sources to try to understand the physiological states giving rise to them. We have previously published several computational models to assist with such interpretation. Like many models in the realm of Systems Biology, these are complex and dependent on many parameters that can be difficult or impossible to measure precisely. Taking one such model, BrainSignals, as a starting point, we have developed several variant models in which specific regions of complexity are substituted with much simpler linear approximations. We demonstrate that model behaviour can be maintained whilst achieving a significant reduction in complexity, provided that the linearity assumptions hold. The simplified models have been tested for applicability with simulated data and experimental data from healthy adults undergoing a hypercapnia challenge, but relevance to different physiological and pathophysiological conditions will require specific testing. In conditions where the simplified models are applicable, their greater efficiency has potential to allow their use at the bedside to help interpret clinical data in near real-time. PMID:25961297

  5. Revisiting the Cape Cod Bacteria Injection Experiment Using a Stochastic Modeling Approach

    SciTech Connect

    Maxwell, R M; Welty, C; Harvey, R W

    2006-11-22

    Bromide and resting-cell bacteria tracer tests carried out in a sand and gravel aquifer at the USGS Cape Cod site in 1987 were reinterpreted using a three-dimensional stochastic approach and Lagrangian particle tracking numerical methods. Bacteria transport was strongly coupled to colloid filtration through functional dependence of local-scale colloid transport parameters on hydraulic conductivity and seepage velocity in a stochastic advection-dispersion/attachment-detachment model. Information on geostatistical characterization of the hydraulic conductivity (K) field from a nearby plot was utilized as input that was unavailable when the original analysis was carried out. A finite difference model for groundwater flow and a particle-tracking model of conservative solute transport was calibrated to the bromide-tracer breakthrough data using the aforementioned geostatistical parameters. An optimization routine was utilized to adjust the mean and variance of the lnK field over 100 realizations such that a best fit of a simulated, average bromide breakthrough curve is achieved. Once the optimal bromide fit was accomplished (based on adjusting the lnK statistical parameters in unconditional simulations), a stochastic particle-tracking model for the bacteria was run without adjustments to the local-scale colloid transport parameters. Good predictions of the mean bacteria breakthrough data were achieved using several approaches for modeling components of the system. Simulations incorporating the recent Tufenkji and Elimelech [1] equation for estimating single collector efficiency were compared to those using the Rajagopalan and Tien [2] model. Both appeared to work equally well at predicting mean bacteria breakthrough using a constant mean bacteria diameter for this set of field conditions, with the Rajagopalan and Tien model yielding approximately a 30% lower peak concentration and less tailing than the Tufenkji and Elimelech formulation. Simulations using a distribution of bacterial cell diameters available from original field notes yielded a slight improvement in the model and data agreement compared to simulations using an average bacteria diameter; variable bacterial cell diameters lowered the modeled peak concentrations and more significantly diminished the tailing behavior, particularly for the Rajagopalan and Tien model of collision frequency. Spatial variability in detachment had little effect on the results. The Lagrangian particle transport model representing the non-idealities of the colloid transport process appears to be a robust, grid-free method for modeling field-scale distribution problems where incorporation of fine-scale heterogeneity would necessitate large numbers of computational cells. The stochastic approach based on estimates of local-scale parameters for the bacteria-transport process both captures the mean field behavior of bacteria transport and calculates an envelope of uncertainty that brackets the observations in most simulation cases.

  6. The consensus in the two-feature two-state one-dimensional Axelrod model revisited

    NASA Astrophysics Data System (ADS)

    Biral, Elias J. P.; Tilles, Paulo F. C.; Fontanari, José F.

    2015-04-01

    The Axelrod model for the dissemination of culture exhibits a rich spatial distribution of cultural domains, which depends on the values of the two model parameters: F, the number of cultural features and q, the common number of states each feature can assume. In the one-dimensional model with F = q = 2, which is closely related to the constrained voter model, Monte Carlo simulations indicate the existence of multicultural absorbing configurations in which at least one macroscopic domain coexist with a multitude of microscopic ones in the thermodynamic limit. However, rigorous analytical results for the infinite system starting from the configuration where all cultures are equally likely show convergence to only monocultural or consensus configurations. Here we show that this disagreement is due simply to the order that the time-asymptotic limit and the thermodynamic limit are taken in the simulations. In addition, we show how the consensus-only result can be derived using Monte Carlo simulations of finite chains.

  7. A NEW APPROACH TO HYDROLOGIC MODELING: DERIVED DISTRIBUTIONS REVISITED. (R824780)

    EPA Science Inventory

    A fractal geometric procedure to model hydrologic (geophysical) phenomena is introduced. The method consists of using derived distributions, obtained by transforming arbitrary multinomial multifractal measures via fractal interpolating functions, to represent observed hydrologic ...

  8. Revisiting Turbulence Model Validation for High-Mach Number Axisymmetric Compression Corner Flows

    NASA Technical Reports Server (NTRS)

    Georgiadis, Nicholas J.; Rumsey, Christopher L.; Huang, George P.

    2015-01-01

    Two axisymmetric shock-wave/boundary-layer interaction (SWBLI) cases are used to benchmark one- and two-equation Reynolds-averaged Navier-Stokes (RANS) turbulence models. This validation exercise was executed in the philosophy of the NASA Turbulence Modeling Resource and the AIAA Turbulence Model Benchmarking Working Group. Both SWBLI cases are from the experiments of Kussoy and Horstman for axisymmetric compression corner geometries with SWBLI inducing flares of 20 and 30 degrees, respectively. The freestream Mach number was approximately 7. The RANS closures examined are the Spalart-Allmaras one-equation model and the Menter family of kappa - omega two equation models including the Baseline and Shear Stress Transport formulations. The Wind-US and CFL3D RANS solvers are employed to simulate the SWBLI cases. Comparisons of RANS solutions to experimental data are made for a boundary layer survey plane just upstream of the SWBLI region. In the SWBLI region, comparisons of surface pressure and heat transfer are made. The effects of inflow modeling strategy, grid resolution, grid orthogonality, turbulent Prandtl number, and code-to-code variations are also addressed.

  9. Repeat topography surveys of geomorphic changes using digital surface models deriving from Formosat-2 daily revisit stereo pair with very narrow baseline

    NASA Astrophysics Data System (ADS)

    Liu, C.; Wen, H.; Liu, J.; Ko, M.; Yan, H.; Chang, L.

    2012-12-01

    Repeat topography surveys provides a geometrically-corrected frame with relief information, which is crucial for studying geomorphic changes after a major slope hazard, such as the debris flow or landslides. The successful operation of Formosat-2 has proved the concept that the temporal resolution of a remote sensing system can be much improved by deploying a high-spatial-resolution sensor in a daily revisit orbit, as each accessible scene can be systematically observed from the same angle under similar illumination conditions. These characteristics make Formosat-2 an ideal satellite for site surveillance, and its images have been successfully applied in environmental monitoring, hazard assessment, orthomap generation, rapidly responding to a global disaster event, and land use management. The attempt of using a Formosat-2 stereo pair to generate a DSM, however, has not been very successful up-to-date. Ironically, it is mainly due to the characteristics of daily-revisit orbit as well. According to the parallax equation, to obtain an accurate height estimation requires a high disparity precision from the stereo pair. The most convenient approach is to maximize the baseline B or the baseline/height (B/H) ratio to a preferred range 0.6 to 1. It is not feasible, however, to acquire an across-track stereo pair with that range of baseline from the daily-revisit orbit using Formosat-2. Even taking the orbit drifting into consideration, it would take a few months to achieve a B/H ratio of approximately 0.15 across track. Another approach is to acquire an along-track stereo pair. But for the mountainous areas, such as the central mountain areas, in Taiwan, the shaded effect and geometrically distortion are apparent. This prohibits any attempt to employ the automatic image matching technique to generate a DSM based on the disparities retrieved from Frmosat-2 along-track stereo pair directly. Phase correlation is operated in the frequency-domain, which enables the relative translative offset between two similar images to be rapidly estimated. To meet the requirements in remote sensing and biomedical imaging, the technology of phase correlation has been extended to the sub-pixel level. Liu and Yan (2008) developed a robust phase correlation model using the based feature matching for image co-registration and DEM generation. Considering the fact that the Formosat-2 consecutive images are intrinsically stereo pairs with very narrow baselines, this innovative stereo-matching algorithm based on SPPC technique is employed to process Formosat-2 daily revisit stereo pairs with very narrow baselines. The detailed accuracy and efficiency analysis is investigated for the study area, Namasha, Kaohsiung, using the 50cm resolution aerial photo and the 2m resolution DEM derived from airborne LiDAR data. The archive of Formosat-2 images in Taiwan area collected from 2005 to 2012 was screened out, with the intention to select the consecutive pairs of those areas where major slope disasters occurred in the past eight years. This research encourages the repeated topography surveys of geomorphic changes using digital surface models deriving from Formosat-2 daily revisit stereo pair with very narrow baseline.

  10. 18 Years Later: Revisiting a Groundwater Model of the Cambric Site at NTS

    NASA Astrophysics Data System (ADS)

    Considine, E. J.; Wheatcraft, S. W.; Meerschaert, M. M.

    2004-12-01

    Since its advent in 1974, the Radionuclide Migration Project at the Nevada Test Site has spawned several interesting groundwater modeling ventures. Of interest to this research is the Cambric detonation site, where a tracer test was conducted from 1975 to 1991. Burbey and Wheatcraft (1986) built a groundwater/transport model of the Cambric site and at the time of calibration had achieved a good match to the measured data. Since then the predicted concentrations have diverged from the measured concentrations, which exhibit classic heavy-tailed behavior. It has been hypothesized that the Fractional Advection Dispersion Equation (FADE) will better predict these late-time high concentrations; this research will apply the FADE to the Cambric problem and aims to reach a more complete understanding of the physical significance of the coefficients contained in the FADE. We first built a preliminary groundwater model, employing the traditional Advection Dispersion Equation, in the hopes of duplicating Burbey's predicted concentrations. Burbey used the Deep Well Disposal Model, whereas this investigation used MODFLOW and MT3D. While the new model has produced a breakthrough curve fitting the peak concentration, it too fails to produce the heavy tail seen in the measured data. Also of concern is the nonuniqueness of the new model's solution; the best-fit breakthrough curve can be produced by changing either one of at least two parameters. We believe that both of these shortcomings (under predicted late-time concentrations and non-uniqueness) may be resolved by using the FADE. Not only does fractional theory permit heavy tails, but also it effectively replaces aquifer heterogeneity with fractional derivatives, thereby reducing the probability of a nonunique solution. Future work includes modeling the Cambric problem with Tadjeran and Meerschaert's numerical, fractional, radial-flow transport code (2003) and evaluating the code's applicability to varied flow and transport conditions.

  11. Revisiting the Rigidly Rotating Magnetosphere model for σ Ori E - I. Observations and data analysis

    NASA Astrophysics Data System (ADS)

    Oksala, M. E.; Wade, G. A.; Townsend, R. H. D.; Owocki, S. P.; Kochukhov, O.; Neiner, C.; Alecian, E.; Grunhut, J.

    2012-01-01

    We have obtained 18 new high-resolution spectropolarimetric observations of the B2Vp star σ Ori E with both the Narval and ESPaDOnS spectropolarimeters. The aim of these observations is to test, with modern data, the assumptions of the Rigidly Rotating Magnetosphere (RRM) model of Townsend & Owocki, applied to the specific case of σ Ori E by Townsend, Owocki & Groote. This model includes a substantially offset dipole magnetic field configuration, and approximately reproduces previous observational variations in longitudinal field strength, photometric brightness and Hα emission. We analyse new spectroscopy, including H I, He I, C II, Si III and Fe III lines, confirming the diversity of variability in photospheric lines, as well as the double S-wave variation of circumstellar hydrogen. Using the multiline analysis method of least-squares deconvolution (LSD), new, more precise longitudinal magnetic field measurements reveal a substantial variance between the shapes of the observed and RRM model time-varying field. The phase-resolved Stokes V profiles of He I 5876 and 6678 Å lines are fitted poorly by synthetic profiles computed from the magnetic topology assumed by Townsend et al.. These results challenge the offset dipole field configuration assumed in the application of the RRM model to σ Ori E, and indicate that future models of its magnetic field should also include complex, higher order components. Footnotes<label>1</label></p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JChPh.143h4107F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JChPh.143h4107F"><span id="translatedtitle">The raspberry <span class="hlt">model</span> for hydrodynamic interactions <span class="hlt">revisited</span>. I. Periodic arrays of spheres and dumbbells</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Fischer, Lukas P.; Peter, Toni; Holm, Christian; de Graaf, Joost</p> <p>2015-08-01</p> <p>The so-called "raspberry" <span class="hlt">model</span> refers to the hybrid lattice-Boltzmann and Langevin molecular dynamics scheme for simulating the dynamics of suspensions of colloidal particles, originally developed by Lobaskin and Dünweg [New J. Phys. 6, 54 (2004)], wherein discrete surface points are used to achieve fluid-particle coupling. This technique has been used in many simulation studies on the behavior of colloids. However, there are fundamental questions with regards to the use of this <span class="hlt">model</span>. In this paper, we examine the accuracy with which the raspberry method is able to reproduce Stokes-level hydrodynamic interactions when compared to analytic expressions for solid spheres in simple-cubic crystals. To this end, we consider the quality of numerical experiments that are traditionally used to establish these properties and we discuss their shortcomings. We show that there is a discrepancy between the translational and rotational mobility reproduced by the simple raspberry <span class="hlt">model</span> and present a way to numerically remedy this problem by adding internal coupling points. Finally, we examine a non-convex shape, namely, a colloidal dumbbell, and show that the filled raspberry <span class="hlt">model</span> replicates the desired hydrodynamic behavior in bulk for this more complicated shape. Our investigation is continued in de Graaf et al. [J. Chem. Phys. 143, 084108 (2015)], wherein we consider the raspberry <span class="hlt">model</span> in the confining geometry of two parallel plates.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/21599150','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/21599150"><span id="translatedtitle">Two-ball problem <span class="hlt">revisited</span>: limitations of event-driven <span class="hlt">modeling</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Mller, Patric; Pschel, Thorsten</p> <p>2011-04-01</p> <p>The main precondition of simulating systems of hard particles by means of event-driven <span class="hlt">modeling</span> is the assumption of instantaneous collisions. The aim of this paper is to quantify the deviation of event-driven <span class="hlt">modeling</span> from the solution of Newton's equation of motion using a paradigmatic example: If a tennis ball is held above a basketball with their centers vertically aligned, and the balls are released to collide with the floor, the tennis ball may rebound at a surprisingly high speed. We show in this article that the simple textbook explanation of this effect is an oversimplification, even for the limit of perfectly elastic particles. Instead, there may occur a rather complex scenario including multiple collisions which may lead to a very different final velocity as compared with the velocity resulting from the oversimplified <span class="hlt">model</span>. PMID:21599150</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011PhRvE..83d1304M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011PhRvE..83d1304M"><span id="translatedtitle">Two-ball problem <span class="hlt">revisited</span>: Limitations of event-driven <span class="hlt">modeling</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Müller, Patric; Pöschel, Thorsten</p> <p>2011-04-01</p> <p>The main precondition of simulating systems of hard particles by means of event-driven <span class="hlt">modeling</span> is the assumption of instantaneous collisions. The aim of this paper is to quantify the deviation of event-driven <span class="hlt">modeling</span> from the solution of Newton’s equation of motion using a paradigmatic example: If a tennis ball is held above a basketball with their centers vertically aligned, and the balls are released to collide with the floor, the tennis ball may rebound at a surprisingly high speed. We show in this article that the simple textbook explanation of this effect is an oversimplification, even for the limit of perfectly elastic particles. Instead, there may occur a rather complex scenario including multiple collisions which may lead to a very different final velocity as compared with the velocity resulting from the oversimplified <span class="hlt">model</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013ISPAn.II2a..63B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013ISPAn.II2a..63B"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Concept of Level of Detail in 3d City <span class="hlt">Modelling</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Biljecki, F.; Zhao, J.; Stoter, J.; Ledoux, H.</p> <p>2013-09-01</p> <p>This review paper discusses the concept of level of detail in 3D city <span class="hlt">modelling</span>, and is a first step towards a foundation for a standardised definition. As an introduction, a few level of detail specifications, outlooks and approaches are given from the industry. The paper analyses the general uncertainties and shortcomings around the concept of level of detail in 3D city <span class="hlt">modelling</span> such as ordinality and inconsistencies, and identifies factors that constitute a specific level of detail. The paper proposes a framework for a new consistent LoD definition which would consolidate present and future LoD paradigms, gives an example of an LoD specification, discusses open questions such as the contexts for which 3D city <span class="hlt">models</span> are used in practice, and gives prospects for a future quantification and sorting of levels of detail.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://pubs.er.usgs.gov/publication/70031085','USGSPUBS'); return false;" href="http://pubs.er.usgs.gov/publication/70031085"><span id="translatedtitle"><span class="hlt">Revisiting</span> the cape cod bacteria injection experiment using a stochastic <span class="hlt">modeling</span> approach</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Maxwell, R.M.; Welty, C.; Harvey, R.W.</p> <p>2007-01-01</p> <p>Bromide and resting-cell bacteria tracer tests conducted in a sandy aquifer at the U.S. Geological Survey Cape Cod site in 1987 were reinterpreted using a three-dimensional stochastic approach. Bacteria transport was coupled to colloid filtration theory through functional dependence of local-scale colloid transport parameters upon hydraulic conductivity and seepage velocity in a stochastic advection - dispersion/attachment - detachment <span class="hlt">model</span>. Geostatistical information on the hydraulic conductivity (K) field that was unavailable at the time of the original test was utilized as input. Using geostatistical parameters, a groundwater flow and particle-tracking <span class="hlt">model</span> of conservative solute transport was calibrated to the bromide-tracer breakthrough data. An optimization routine was employed over 100 realizations to adjust the mean and variance ofthe natural-logarithm of hydraulic conductivity (InK) field to achieve best fit of a simulated, average bromide breakthrough curve. A stochastic particle-tracking <span class="hlt">model</span> for the bacteria was run without adjustments to the local-scale colloid transport parameters. Good predictions of mean bacteria breakthrough were achieved using several approaches for <span class="hlt">modeling</span> components of the system. Simulations incorporating the recent Tufenkji and Elimelech (Environ. Sci. Technol. 2004, 38, 529-536) correlation equation for estimating single collector efficiency were compared to those using the older Rajagopalan and Tien (AIChE J. 1976, 22, 523-533) <span class="hlt">model</span>. Both appeared to work equally well at predicting mean bacteria breakthrough using a constant mean bacteria diameter for this set of field conditions. Simulations using a distribution of bacterial cell diameters available from original field notes yielded a slight improvement in the <span class="hlt">model</span> and data agreement compared to simulations using an average bacterial diameter. The stochastic approach based on estimates of local-scale parameters for the bacteria-transport process reasonably captured the mean bacteria transport behavior and calculated an envelope of uncertainty that bracketed the observations in most simulation cases. ?? 2007 American Chemical Society.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/15164227','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/15164227"><span id="translatedtitle">Large amplification in stage-structured <span class="hlt">models</span>: Arnol'd tongues <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Greenman, J V; Benton, T G</p> <p>2004-06-01</p> <p>The coexistence of periodic and point attractors has been confirmed for a range of stage-structured discrete time <span class="hlt">models</span>. The periodic attractor cycles have large amplitude, with the populations cycling between extremely low and surprisingly high values when compared to the equilibrium level. In this situation a stable state can be shocked by noise of sufficient strength into a state of high volatility. We found that the source of these large amplitude cycles are Arnol'd tongues, special regions of parameter space where the system exhibits periodic behaviour. Most of these tongues lie entirely in that part of parameter space where the system is unstable, but there are exceptions and these exceptions are the tongues that lead to attractor coexistence. Similarity in the geometry of Arnol'd tongues over the range of <span class="hlt">models</span> considered might suggest that this is a common feature of stage-structured <span class="hlt">models</span> but in the absence of proof this can only be a useful working hypothesis. The analysis shows that although large amplitude cycles might exist mathematically they might not be accessible biologically if biological constraints, such as non-negativity of population densities and vital rates, are imposed. Accessibility is found to be highly sensitive to <span class="hlt">model</span> structure even though the mathematical structure is not. This highlights the danger of drawing biological conclusions from particular <span class="hlt">models</span>. Having a comprehensive view of the different mechanisms by which periodic states can arise in families of discrete time <span class="hlt">models</span> is important in the debate on whether the causes of periodicity in particular ecological systems are intrinsic, environmental or trophic. This paper is a contribution to that continuing debate. PMID:15164227</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007JGRD..11213107R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007JGRD..11213107R"><span id="translatedtitle">Nuclear winter <span class="hlt">revisited</span> with a modern climate <span class="hlt">model</span> and current nuclear arsenals: Still catastrophic consequences</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Robock, Alan; Oman, Luke; Stenchikov, Georgiy L.</p> <p>2007-07-01</p> <p>Twenty years ago, the results of climate <span class="hlt">model</span> simulations of the response to smoke and dust from a massive nuclear exchange between the superpowers could be summarized as "nuclear winter," with rapid temperature, precipitation, and insolation drops at the surface that would threaten global agriculture for at least a year. The global nuclear arsenal has fallen by a factor of three since then, but there has been an expansion of the number of nuclear weapons states, with additional states trying to develop nuclear arsenals. We use a modern climate <span class="hlt">model</span> to reexamine the climate response to a range of nuclear wars, producing 50 and 150 Tg of smoke, using moderate and large portions of the current global arsenal, and find that there would be significant climatic responses to all the scenarios. This is the first time that an atmosphere-ocean general circulation <span class="hlt">model</span> has been used for such a simulation and the first time that 10-year simulations have been conducted. The response to the 150 Tg scenario can still be characterized as "nuclear winter," but both produce global catastrophic consequences. The changes are more long-lasting than previously thought, however, because the new <span class="hlt">model</span>, National Aeronautics and Space Administration Goddard Institute for Space Studies <span class="hlt">ModelE</span>, is able to represent the atmosphere up to 80 km, and simulates plume rise to the middle and upper stratosphere, producing a long aerosol lifetime. The indirect effects of nuclear weapons would have devastating consequences for the planet, and continued nuclear arsenal reductions will be needed before the threat of nuclear winter is removed from the Earth.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013EGUGA..1511650R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013EGUGA..1511650R"><span id="translatedtitle"><span class="hlt">Revisiting</span> the radionuclide atmospheric dispersion event of the Chernobyl disaster - <span class="hlt">modelling</span> sensitivity and data assimilation</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Roustan, Yelva; Duhanyan, Nora; Bocquet, Marc; Winiarek, Victor</p> <p>2013-04-01</p> <p>A sensitivity study of the numerical <span class="hlt">model</span>, as well as, an inverse <span class="hlt">modelling</span> approach applied to the atmospheric dispersion issues after the Chernobyl disaster are both presented in this paper. On the one hand, the robustness of the source term reconstruction through advanced data assimilation techniques was tested. On the other hand, the classical approaches for sensitivity analysis were enhanced by the use of an optimised forcing field which otherwise is known to be strongly uncertain. The POLYPHEMUS air quality system was used to perform the simulations of radionuclide dispersion. Activity concentrations in air and deposited to the ground of iodine-131, caesium-137 and caesium-134 were considered. The impact of the implemented parameterizations of the physical processes (dry and wet depositions, vertical turbulent diffusion), of the forcing fields (meteorology and source terms) and of the numerical configuration (horizontal resolution) were investigated for the sensitivity study of the <span class="hlt">model</span>. A four dimensional variational scheme (4D-Var) based on the approximate adjoint of the chemistry transport <span class="hlt">model</span> was used to invert the source term. The data assimilation is performed with measurements of activity concentrations in air extracted from the Radioactivity Environmental Monitoring (REM) database. For most of the investigated configurations (sensitivity study), the statistics to compare the <span class="hlt">model</span> results to the field measurements as regards the concentrations in air are clearly improved while using a reconstructed source term. As regards the ground deposited concentrations, an improvement can only be seen in case of satisfactorily <span class="hlt">modelled</span> episode. Through these studies, the source term and the meteorological fields are proved to have a major impact on the activity concentrations in air. These studies also reinforce the use of reconstructed source term instead of the usual estimated one. A more detailed parameterization of the deposition process seems also to be able to improve the simulation results. For deposited activities the results are more complex probably due to a strong sensitivity to some of the meteorological fields which remain quite uncertain.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/17822131','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/17822131"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Cape Cod bacteria injection experiment using a stochastic <span class="hlt">modeling</span> approach.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Maxwell, Reed M; Welty, Claire; Harvey, Ronald W</p> <p>2007-08-01</p> <p>Bromide and resting-cell bacteria tracer tests conducted in a sandy aquifer at the U.S. Geological Survey Cape Cod site in 1987 were reinterpreted using a three-dimensional stochastic approach. Bacteria transport was coupled to colloid filtration theory through functional dependence of local-scale colloid transport parameters upon hydraulic conductivity and seepage velocity in a stochastic advection-dispersion/attachment-detachment <span class="hlt">model</span>. Geostatistical information on the hydraulic conductivity (K) field that was unavailable at the time of the original test was utilized as input. Using geostatistical parameters, a groundwater flow and particle-tracking <span class="hlt">model</span> of conservative solute transport was calibrated to the bromide-tracer breakthrough data. An optimization routine was employed over 100 realizations to adjust the mean and variance of the natural-logarithm of hydraulic conductivity (InK) field to achieve best fit of a simulated, average bromide breakthrough curve. A stochastic particle-tracking <span class="hlt">model</span> for the bacteria was run without adjustments to the local-scale colloid transport parameters. Good predictions of mean bacteria breakthrough were achieved using several approaches for <span class="hlt">modeling</span> components of the system. Simulations incorporating the recent Tufenkji and Elimelech (Environ. Sci. Technol. 2004, 38, 529-536) correlation equation for estimating single collector efficiency were compared to those using the older Rajagopalan and Tien (AIChEJ. 1976, 22, 523-533) <span class="hlt">model</span>. Both appeared to work equally well at predicting mean bacteria breakthrough using a constant mean bacteria diameter for this set of field conditions. Simulations using a distribution of bacterial cell diameters available from original field notes yielded a slight improvement in the <span class="hlt">model</span> and data agreement compared to simulations using an average bacterial diameter. The stochastic approach based on estimates of local-scale parameters for the bacteria-transport process reasonably captured the mean bacteria transport behavior and calculated an envelope of uncertainty that bracketed the observations in most simulation cases. PMID:17822131</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_4");'>4</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li class="active"><span>6</span></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_6 --> <div id="page_7" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li class="active"><span>7</span></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="121"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011A%26A...532A.121H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011A%26A...532A.121H"><span id="translatedtitle">The Bosma effect <span class="hlt">revisited</span>. I. HI and stellar disc scaling <span class="hlt">models</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hessman, F. V.; Ziebart, M.</p> <p>2011-08-01</p> <p>Context. The observed proportionality between the centripetal contribution of the dynamically insignificant HI gas in the discs of spiral galaxies and the dominant contribution of dark matter (DM) - the "Bosma effect" - has been repeatedly mentioned in the literature but largely ignored. Since this phenomenology, if statistically significant, tells us something about the relationship between the visible baryonic and invisible DM, it is important to re-examine the reality of this effect using formal tests and more modern data. Aims: We have re-examined the evidence for the Bosma effect, either by scaling the contribution of the HI gas alone or by using both the observed stellar disc and HI gas as proxies. Methods: We have calculated Bosma effect <span class="hlt">models</span> for 17 galaxies in The HI Nearby Galaxy Survey data set. The results are compared with two <span class="hlt">models</span> for exotic cold DM: internally consistent cosmological Navarro-Frenk-White (NFW) <span class="hlt">models</span> with constrained compactness parameters, and "universal rotation curve" (URC) <span class="hlt">models</span> using fully unconstrained Burkert density profiles. Results: Fits to spiral galaxy rotation curves computed using just HI scaling are inadequate, despite the clear proportionality seen in the outer discs. The poor performance is obviously related to the prominent decrease in the HI surface density in regions of high stellar surface density, where HI has been converted into molecules and stars. The Bosma <span class="hlt">models</span> that partially correct for this physical effect using the stellar discs as additional proxies are statistically nearly as good as the URC <span class="hlt">models</span> and clearly better than the NFW ones. Conclusions: We confirm the correlation between the centripetal effects of DM and that of the interstellar medium of spiral galaxies. The efficacy of "maximal disc" <span class="hlt">models</span> is explained as the natural consequence of "classic" Bosma <span class="hlt">models</span> which include the stellar disc as a proxy in regions of reduced atomic gas. The perception that the Bosma effect could be due to the near-equality of the HI surface density and the projected mass density of a cold DM halo is incorrect, both theoretically and empirically. The standard explanation - that the effect reflects a statistical correlation between the visible and exotic DM - seems highly unlikely, given that the geometric forms and hence centripetal signatures of spherical halo and disc components are so different. A literal interpretation of the Bosma effect as being due to the presence of significant amounts of disc DM requires a median visible baryon to disc DM ratio of about 40%.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Nm&id=EJ910601','ERIC'); return false;" href="http://eric.ed.gov/?q=Nm&id=EJ910601"><span id="translatedtitle">The Structure of Academic Self-Concepts <span class="hlt">Revisited</span>: The Nested Marsh/Shavelson <span class="hlt">Model</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Brunner, Martin; Keller, Ulrich; Dierendonck, Christophe; Reichert, Monique; Ugen, Sonja; Fischbach, Antoine; Martin, Romain</p> <p>2010-01-01</p> <p>The nested Marsh/Shavelson (NMS) <span class="hlt">model</span> integrates structural characteristics of academic self-concepts that have proved empirically incompatible in previous studies. Specifically, it conceives of academic self-concepts to be subject specific, strongly separated across domains, and hierarchically organized, with general academic self-concept at the</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Frame+AND+Structure&pg=6&id=EJ933873','ERIC'); return false;" href="http://eric.ed.gov/?q=Frame+AND+Structure&pg=6&id=EJ933873"><span id="translatedtitle">The PANAS Structure <span class="hlt">Revisited</span>: On the Validity of a Bifactor <span class="hlt">Model</span> in Community and Forensic Samples</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Leue, Anja; Beauducel, Andre</p> <p>2011-01-01</p> <p>The Positive and Negative Affect Schedule (PANAS) is a widely used inventory for the assessment of affect in psychology and other applied sciences. Despite its popularity, the structure of the PANAS is still under debate. On the one hand, there is evidence of the traditional 2-factor <span class="hlt">model</span> with Positive Affect (PA) and Negative Affect (NA) as</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=iceland&pg=2&id=EJ890089','ERIC'); return false;" href="http://eric.ed.gov/?q=iceland&pg=2&id=EJ890089"><span id="translatedtitle">Holland in Iceland <span class="hlt">Revisited</span>: An Emic Approach to Evaluating U.S. Vocational Interest <span class="hlt">Models</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Einarsdottir, Sif; Rounds, James; Su, Rong</p> <p>2010-01-01</p> <p>An emic approach was used to test the structural validity and applicability of Holland's (1997) RIASEC (Realistic, Investigative, Artistic, Social, Enterprising, Conventional) <span class="hlt">model</span> in Iceland. Archival data from the development of the Icelandic Interest Inventory (Einarsdottir & Rounds, 2007) were used in the present investigation. The data…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=selfconcept&pg=5&id=EJ1067659','ERIC'); return false;" href="http://eric.ed.gov/?q=selfconcept&pg=5&id=EJ1067659"><span id="translatedtitle">The Reciprocal Effects <span class="hlt">Model</span> <span class="hlt">Revisited</span>: Extending Its Reach to Gifted Students Attending Academically Selective Schools</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Seaton, Marjorie; Marsh, Herbert W.; Parker, Philip D.; Craven, Rhonda G.; Yeung, Alexander S.</p> <p>2015-01-01</p> <p>The reciprocal effects <span class="hlt">model</span> (REM) predicts a reciprocal relation between academic self-concept and academic achievement, whereby prior academic self-concept is associated with future gains in achievement, and prior achievement is related to subsequent academic self-concept. Although research in this area has been extensive, there has been a…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26077396','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26077396"><span id="translatedtitle"><span class="hlt">Revisiting</span> the case for genetically engineered mouse <span class="hlt">models</span> in human myelodysplastic syndrome research.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhou, Ting; Kinney, Marsha C; Scott, Linda M; Zinkel, Sandra S; Rebel, Vivienne I</p> <p>2015-08-27</p> <p>Much-needed attention has been given of late to diseases specifically associated with an expanding elderly population. Myelodysplastic syndrome (MDS), a hematopoietic stem cell-based blood disease, is one of these. The lack of clear understanding of the molecular mechanisms underlying the pathogenesis of this disease has hampered the development of efficacious therapies, especially in the presence of comorbidities. Mouse <span class="hlt">models</span> could potentially provide new insights into this disease, although primary human MDS cells grow poorly in xenografted mice. This makes genetically engineered murine <span class="hlt">models</span> a more attractive proposition, although this approach is not without complications. In particular, it is unclear if or how myelodysplasia (abnormal blood cell morphology), a key MDS feature in humans, presents in murine cells. Here, we evaluate the histopathologic features of wild-type mice and 23 mouse <span class="hlt">models</span> with verified myelodysplasia. We find that certain features indicative of myelodysplasia in humans, such as Howell-Jolly bodies and low neutrophilic granularity, are commonplace in healthy mice, whereas other features are similarly abnormal in humans and mice. Quantitative hematopoietic parameters, such as blood cell counts, are required to distinguish between MDS and related diseases. We provide data that mouse <span class="hlt">models</span> of MDS can be genetically engineered and faithfully recapitulate human disease. PMID:26077396</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015Icar..261..133K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015Icar..261..133K"><span id="translatedtitle">Sulfur in the early martian atmosphere <span class="hlt">revisited</span>: Experiments with a 3-D Global Climate <span class="hlt">Model</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kerber, Laura; Forget, François; Wordsworth, Robin</p> <p>2015-11-01</p> <p>Volcanic SO2 in the martian atmosphere has been invoked as a way to create a sustained or transient greenhouse during early martian history. Many <span class="hlt">modeling</span> studies have been performed to test the feasibility of this hypothesis, resulting in a range of conclusions, from highly feasible to highly improbable. In this study we perform a wide range of simulations using the 3-D Laboratoire de Météorologie Dynamique Generic Global Climate <span class="hlt">Model</span> (GCM) in order to place earlier results into context and to explore the sensitivity of <span class="hlt">model</span> outcomes to parameters such as SO2 mixing ratio, atmospheric H2O content, background atmospheric pressure, and aerosol size, abundance, and composition. We conclude that SO2 is incapable of creating a sustained greenhouse on early Mars, and that even in the absence of aerosols, local and daily temperatures rise above 273 K for only for limited periods with favorable background CO2 pressures. In the presence of even small amounts of aerosols, the surface is dramatically cooled for realistic aerosol sizes. Brief, mildly warm conditions require the co-occurrence of many improbable factors, while cooling is achieved for a wide range of <span class="hlt">model</span> parameters. Instead of causing warming, sulfur in the martian atmosphere may have caused substantial cooling, leading to the end of clement climate conditions on early Mars.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=forensic+AND+psychology&pg=4&id=EJ933873','ERIC'); return false;" href="http://eric.ed.gov/?q=forensic+AND+psychology&pg=4&id=EJ933873"><span id="translatedtitle">The PANAS Structure <span class="hlt">Revisited</span>: On the Validity of a Bifactor <span class="hlt">Model</span> in Community and Forensic Samples</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Leue, Anja; Beauducel, Andre</p> <p>2011-01-01</p> <p>The Positive and Negative Affect Schedule (PANAS) is a widely used inventory for the assessment of affect in psychology and other applied sciences. Despite its popularity, the structure of the PANAS is still under debate. On the one hand, there is evidence of the traditional 2-factor <span class="hlt">model</span> with Positive Affect (PA) and Negative Affect (NA) as…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JChPh.143h4108D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JChPh.143h4108D"><span id="translatedtitle">The Raspberry <span class="hlt">model</span> for hydrodynamic interactions <span class="hlt">revisited</span>. II. The effect of confinement</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>de Graaf, Joost; Peter, Toni; Fischer, Lukas P.; Holm, Christian</p> <p>2015-08-01</p> <p>The so-called "raspberry" <span class="hlt">model</span> refers to the hybrid lattice-Boltzmann (LB) and Langevin molecular dynamics schemes for simulating the dynamics of suspensions of colloidal particles, originally developed by Lobaskin and Dünweg [New J. Phys. 6, 54 (2004)], wherein discrete surface points are used to achieve fluid-particle coupling. In this paper, we present a follow up to our study of the effectiveness of the raspberry <span class="hlt">model</span> in reproducing hydrodynamic interactions in the Stokes regime for spheres arranged in a simple-cubic crystal [Fischer et al., J. Chem. Phys. 143, 084107 (2015)]. Here, we consider the accuracy with which the raspberry <span class="hlt">model</span> is able to reproduce such interactions for particles confined between two parallel plates. To this end, we compare our LB simulation results to established theoretical expressions and finite-element calculations. We show that there is a discrepancy between the translational and rotational mobilities when only surface coupling points are used, as also found in Part I of our joint publication. We demonstrate that adding internal coupling points to the raspberry can be used to correct said discrepancy in confining geometries as well. Finally, we show that the raspberry <span class="hlt">model</span> accurately reproduces hydrodynamic interactions between a spherical colloid and planar walls up to roughly one LB lattice spacing.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=design+AND+Hospital&pg=7&id=EJ885695','ERIC'); return false;" href="http://eric.ed.gov/?q=design+AND+Hospital&pg=7&id=EJ885695"><span id="translatedtitle">Curricular Adaptations in Inpatient Child Psychiatry for the 21st Century: The Flexner <span class="hlt">Model</span> <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bell, Cathy K.; Guerrero, Anthony; Matsu, Courtenay; Takeshita, Junji; Haning, William; Schultz, Karen</p> <p>2010-01-01</p> <p>Objective: The authors describe curricular modifications created in response to the changing culture of medical education, health care systems, academic medicine, and generational differences. The authors propose a <span class="hlt">model</span> child psychiatry inpatient curriculum that is sustainable within a community teaching hospital in the 21st century. Methods: The…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=psychiatry+AND+models&id=EJ885695','ERIC'); return false;" href="http://eric.ed.gov/?q=psychiatry+AND+models&id=EJ885695"><span id="translatedtitle">Curricular Adaptations in Inpatient Child Psychiatry for the 21st Century: The Flexner <span class="hlt">Model</span> <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bell, Cathy K.; Guerrero, Anthony; Matsu, Courtenay; Takeshita, Junji; Haning, William; Schultz, Karen</p> <p>2010-01-01</p> <p>Objective: The authors describe curricular modifications created in response to the changing culture of medical education, health care systems, academic medicine, and generational differences. The authors propose a <span class="hlt">model</span> child psychiatry inpatient curriculum that is sustainable within a community teaching hospital in the 21st century. Methods: The</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=fischbach&id=EJ910601','ERIC'); return false;" href="http://eric.ed.gov/?q=fischbach&id=EJ910601"><span id="translatedtitle">The Structure of Academic Self-Concepts <span class="hlt">Revisited</span>: The Nested Marsh/Shavelson <span class="hlt">Model</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Brunner, Martin; Keller, Ulrich; Dierendonck, Christophe; Reichert, Monique; Ugen, Sonja; Fischbach, Antoine; Martin, Romain</p> <p>2010-01-01</p> <p>The nested Marsh/Shavelson (NMS) <span class="hlt">model</span> integrates structural characteristics of academic self-concepts that have proved empirically incompatible in previous studies. Specifically, it conceives of academic self-concepts to be subject specific, strongly separated across domains, and hierarchically organized, with general academic self-concept at the…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012A%26A...538A.149W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012A%26A...538A.149W"><span id="translatedtitle">The chemistry of C3 and C2 in cometary comae. I. Current <span class="hlt">models</span> <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Weiler, M.</p> <p>2012-02-01</p> <p>Context. It is widely accepted that C3 and in particular C2 play an important role in the compositional classification of comets, and the most well-established classification scheme to date is indeed based on the Haser production rates of these two radicals. A link between both C3 and C2 and their actual parent molecules would therefore be desirable to allow both a physical and chemical interpretation of the compositional classification of comets. A first detailed study was performed by Helbert and collaborators for comet C/1995 O1 (Hale-Bopp), which suggested a link between these two radicals and the parent species C2H2, C2H6, and C3H4. Aims: We extend previous studies of the formation of C3 and C2 to other comets at smaller heliocentric distances. The proposed <span class="hlt">model</span> for the formation of these two radicals is tested for these comets. Methods: We compare the observed radial column densities of C3 and C2 in the comae of the comets C/2001 Q4 (NEAT), C/2002 T7 (LINEAR), and 9P/Tempel 1 with the results of a one-dimensional multi-fluid coma chemistry <span class="hlt">model</span>. The shape of the <span class="hlt">modelled</span> radial column density profiles are compared with the observed profiles, and the production rates of the parent species are computed by fitting the observational data with the <span class="hlt">model</span>. Results: We do not find that C2H6 is a significant parent species of the observed cometary C2. Furthermore, electron impact reactions do not play an important role in the formation of C3. The <span class="hlt">model</span> for the formation of C3 and C2 derived from comet Hale-Bopp is inconsistent with observations of these radicals in other comets. Based on observations collected at the European Southern Observatory, Chile (ESO programmes 073.C-0571 and 075.C-0355).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/18484826','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/18484826"><span id="translatedtitle">The prototype effect <span class="hlt">revisited</span>: Evidence for an abstract feature <span class="hlt">model</span> of face recognition.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wallis, Guy; Siebeck, Ulrike E; Swann, Kellie; Blanz, Volker; Bülthoff, Heinrich H</p> <p>2008-01-01</p> <p>Humans typically have a remarkable memory for faces. Nonetheless, in some cases they can be fooled. Experiments described in this paper provide new evidence for an effect in which observers falsely "recognize" a face that they have never seen before. The face is a chimera (prototype) built from parts extracted from previously viewed faces. It is known that faces of this kind can be confused with truly familiar faces, a result referred to as the prototype effect. However, recent studies have failed to find evidence for a full effect, one in which the prototype is regarded not only as familiar, but as more familiar than faces which have been seen before. This study sought to reinvestigate the effect. In a pair of experiments, evidence is reported for the full effect based on both an old/new discrimination task and a familiarity ranking task. The results are shown to be consistent with a recognition <span class="hlt">model</span> in which faces are represented as combinations of reusable, abstract features. In a final experiment, novel predictions of the <span class="hlt">model</span> are verified by comparing the size of the prototype effect for upright and upside-down faces. Despite the fundamentally piecewise nature of the <span class="hlt">model</span>, an explanation is provided as to how it can also account for the sensitivity of observers to configural and holistic cues. This discussion is backed up with the use of an unsupervised network <span class="hlt">model</span>. Overall, the paper describes how an abstract feature-based <span class="hlt">model</span> can reconcile a range of results in the face recognition literature and, in turn, lessen currently perceived differences between the representation of faces and other objects. PMID:18484826</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=theories+AND+chemical+AND+changes&pg=4&id=EJ823781','ERIC'); return false;" href="http://eric.ed.gov/?q=theories+AND+chemical+AND+changes&pg=4&id=EJ823781"><span id="translatedtitle">The Rotating Morse-Pekeris Oscillator <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Zuniga, Jose; Bastida, Adolfo; Requena, Alberto</p> <p>2008-01-01</p> <p>The Morse-Pekeris oscillator <span class="hlt">model</span> for the calculation of the vibration-rotation energy levels of diatomic molecules is <span class="hlt">revisited</span>. This <span class="hlt">model</span> is based on the realization of a second-order exponential expansion of the centrifugal term about the minimum of the vibrational Morse oscillator and the subsequent analytical resolution of the resulting</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=vibration&pg=6&id=EJ823781','ERIC'); return false;" href="http://eric.ed.gov/?q=vibration&pg=6&id=EJ823781"><span id="translatedtitle">The Rotating Morse-Pekeris Oscillator <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Zuniga, Jose; Bastida, Adolfo; Requena, Alberto</p> <p>2008-01-01</p> <p>The Morse-Pekeris oscillator <span class="hlt">model</span> for the calculation of the vibration-rotation energy levels of diatomic molecules is <span class="hlt">revisited</span>. This <span class="hlt">model</span> is based on the realization of a second-order exponential expansion of the centrifugal term about the minimum of the vibrational Morse oscillator and the subsequent analytical resolution of the resulting…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22233542','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22233542"><span id="translatedtitle">The abelian confinement mechanism <span class="hlt">revisited</span>: New aspects of the Georgi–Glashow <span class="hlt">model</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Anber, Mohamed M.</p> <p>2014-02-15</p> <p>The confinement problem remains one of the most difficult problems in theoretical physics. An important step toward the solution of this problem is Polyakov’s work on abelian confinement. The Georgi–Glashow <span class="hlt">model</span> is a natural testing ground for this mechanism which has been surprising us by its richness and wide applicability. In this work, we shed light on two new aspects of this <span class="hlt">model</span> in 2+1 D. First, we develop a many-body description of the effective degrees of freedom. Namely, we consider a non-relativistic gas of W-bosons in the background of monopole–instanton plasma. Many-body treatment is a standard toolkit in condensed matter physics. However, we add a new twist by supplying the monopole–instantons as external background field. Using this construction along with a mean-field approximation, we calculate the form of the potential between two electric probes as a function of their separation. This potential is expressed in terms of the Meijer-G function which interpolates between logarithmic and linear behavior at small and large distances, respectively. Second, we develop a systematic approach to integrate out the effect of the W-bosons at finite temperature in the range 0≤T<M{sub W}, where M{sub W} is the W-boson mass, starting from the full relativistic partition function of the Georgi–Glashow <span class="hlt">model</span>. Using a heat kernel expansion that takes into account the non-trivial thermal holonomy, we show that the partition function describes a three-dimensional two-component Coulomb gas. We repeat our analysis using the many-body description which yields the same result and provides a check on our formalism. At temperatures close to the deconfinement temperature, the gas becomes essentially two-dimensional recovering the partition function of the dual sine-Gordon <span class="hlt">model</span> that was considered in a previous work. -- Highlights: • We consider the problem of abelian confinement in the Georgi–Glashow <span class="hlt">model</span> from a new perspective. • We develop a many-body description of the degrees of freedom of this <span class="hlt">model</span> in the background of monopole–instanton plasma. • We use the many-body formalism to find an analytic expression of the potential between two probes at zero temperature. • We also use a systematic approach to integrate out the W-bosons starting from the full relativistic partition function. • This results in a three-dimensional two-component Coulomb gas with long range and Aharonov–Bohm phase interaction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/21415202','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/21415202"><span id="translatedtitle">Nambu-Jona-Lasinio <span class="hlt">model</span> of homogeneous neutral quark matter: Pseudoscalar diquark condensates <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Basler, H.; Buballa, M.</p> <p>2010-03-01</p> <p>We use a Nambu-Jona-Lasinio type <span class="hlt">model</span> to investigate the phase diagram of dense quark matter under neutron star conditions in mean-field approximation. The <span class="hlt">model</span> contains self-consistently determined quark masses and allows for diquark condensation in the scalar as well as in the pseudoscalar channel. The latter gives rise to the possibility of K{sup 0} condensation in the color-flavor locked phase. In agreement with earlier studies we find that this CFLK{sup 0} phase covers large regions of the phase diagram and that the predominant part of this phase is fully gapped. We show, however, that there exists a region at very low temperatures where the CFLK{sup 0} solutions become gapless, possibly indicating an instability towards anisotropic or inhomogeneous phases. The physical significance of solutions with pseudoscalar diquark condensates in the 2SC phase is discussed as well.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013EGUGA..1513374H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013EGUGA..1513374H"><span id="translatedtitle">Climate classification <span class="hlt">revisited</span>: From Köppen to Trewartha for <span class="hlt">models</span> evaluation</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Halenka, Tomas; Belda, Michal; Kalvova, Jaroslava; Holtanova, Eva</p> <p>2013-04-01</p> <p>The analysis of climate patterns can be performed for each climatic variable separately or the data can be aggregated using e.g. a kind of climate classification. These classifications usually correspond to vegetation distribution in the sense that each climate type is dominated by one vegetation zone or eco-region. This way climate classifications also represent a convenient tool for validation of climate <span class="hlt">models</span> and for the analysis of simulated future climate changes. Basic concepts are presented on global CRU data and the analysis is shown on CMIP5 family of GCM simulations. Different performance of individual GCMs can be seen, but with clear indication of some similarities given by the <span class="hlt">model</span> dependencies. This evaluation can provide first insight on the driving GCM performance in individual region for further downscaling. Furthemore, the preliminary analysis evaluating Euro-CORDEX simulations in terms of chmate types will be presented.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25678683','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25678683"><span id="translatedtitle"><span class="hlt">Revisiting</span> a two-patch SIS <span class="hlt">model</span> with infection during transport.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Arino, Julien; Sun, Chengjun; Yang, Wei</p> <p>2016-03-01</p> <p>We incorporate parameter heterogeneity in a two-patch susceptible-infectious-susceptible (SIS) epidemic <span class="hlt">model</span> with infection during transport and prove that the disease-free and endemic equilibria are globally asymptotically stable when the basic reproduction number [Formula: see text] and [Formula: see text], respectively. We find that infection during transport increases the possibility that the disease persists in both patches and amplifies prevalence when disease is present. We then study the effect of a perfect unilateral exit screening programme. Finally, we compare numerically the effects of using different incidence functions for infection within and while travelling between patches, and find that using mass action incidence to <span class="hlt">model</span> infection during transport has the effect of maintaining disease prevalence at a higher level compared with when standard incidence is used. PMID:25678683</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li class="active"><span>7</span></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_7 --> <div id="page_8" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li class="active"><span>8</span></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="141"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JSMTE..09..016B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JSMTE..09..016B"><span id="translatedtitle">Learning of couplings for random asymmetric kinetic Ising <span class="hlt">models</span> <span class="hlt">revisited</span>: random correlation matrices and learning curves</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bachschmid-Romano, Ludovica; Opper, Manfred</p> <p>2015-09-01</p> <p>We study analytically the performance of a recently proposed algorithm for learning the couplings of a random asymmetric kinetic Ising <span class="hlt">model</span> from finite length trajectories of the spin dynamics. Our analysis shows the importance of the nontrivial equal time correlations between spins induced by the dynamics for the speed of learning. These correlations become more important as the spin's stochasticity is decreased. We also analyse the deviation of the estimation error from asymptotic optimality.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AnPhy.341...21A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AnPhy.341...21A"><span id="translatedtitle">The abelian confinement mechanism <span class="hlt">revisited</span>: New aspects of the Georgi-Glashow <span class="hlt">model</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Anber, Mohamed M.</p> <p>2014-02-01</p> <p>The confinement problem remains one of the most difficult problems in theoretical physics. An important step toward the solution of this problem is Polyakov's work on abelian confinement. The Georgi-Glashow <span class="hlt">model</span> is a natural testing ground for this mechanism which has been surprising us by its richness and wide applicability. In this work, we shed light on two new aspects of this <span class="hlt">model</span> in 2+1 D. First, we develop a many-body description of the effective degrees of freedom. Namely, we consider a non-relativistic gas of W-bosons in the background of monopole-instanton plasma. Many-body treatment is a standard toolkit in condensed matter physics. However, we add a new twist by supplying the monopole-instantons as external background field. Using this construction along with a mean-field approximation, we calculate the form of the potential between two electric probes as a function of their separation. This potential is expressed in terms of the Meijer-G function which interpolates between logarithmic and linear behavior at small and large distances, respectively. Second, we develop a systematic approach to integrate out the effect of the W-bosons at finite temperature in the range 0≤T<MW, where MW is the W-boson mass, starting from the full relativistic partition function of the Georgi-Glashow <span class="hlt">model</span>. Using a heat kernel expansion that takes into account the non-trivial thermal holonomy, we show that the partition function describes a three-dimensional two-component Coulomb gas. We repeat our analysis using the many-body description which yields the same result and provides a check on our formalism. At temperatures close to the deconfinement temperature, the gas becomes essentially two-dimensional recovering the partition function of the dual sine-Gordon <span class="hlt">model</span> that was considered in a previous work.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/27004460','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/27004460"><span id="translatedtitle"><span class="hlt">Revisiting</span> the thermodynamic <span class="hlt">modelling</span> of type I gas-hydroquinone clathrates.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Conde, M M; Torré, J P; Miqueu, C</p> <p>2016-04-21</p> <p>Under specific pressure and temperature conditions, certain gaseous species can be engaged in a host lattice of hydroquinone molecules, forming a supramolecular entity called a gas hydroquinone clathrate. This study is devoted to the thermodynamic <span class="hlt">modelling</span> of type I hydroquinone clathrates. The gases considered in this work are argon, krypton, xenon, methane, nitrogen, oxygen and hydrogen sulphide. The basic van der Waals and Platteeuw <span class="hlt">model</span>, which is, for example, not able to predict well the phase equilibrium properties of such clathrates at high temperature, is modified and extended by considering first the solubility of the guest in solid HQ and then the mutual interactions between the gaseous molecules inside the clathrate structure (i.e. guest-guest interactions). Other improvements of the basic theory, such as the choice of the reference state, are proposed, and a unique set of thermodynamic parameters valid for all the studied guests are finally calculated. Very good agreement is obtained between the <span class="hlt">model</span> predictions and the experimental data available in the literature. Our results clearly demonstrate that the highest level of theory is necessary to describe well both the triphasic equilibrium line (where the HQ clathrate, the native hydroquinone HQα and the gas coexist), the occupancy of the guest in the clathrate, and the intercalation enthalpy. PMID:27004460</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26039139','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26039139"><span id="translatedtitle">The Educational <span class="hlt">Model</span> of Private Colleges of Osteopathic Medicine: <span class="hlt">Revisited</span> for 2003-2013.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Cummings, Mark</p> <p>2015-12-01</p> <p>Trends in the development of new private colleges of osteopathic medicine (COMs) described by the author in 2003 have accelerated in the ensuing decade. During 2003 to 2013, 10 new COMs as well as 2 remote teaching sites and 4 new branch campuses at private institutions were accredited, leading to a 98% increase in the number of students enrolled in private COMs. The key features of the private COM educational <span class="hlt">model</span> during this period were a reliance on student tuition, the establishment of health professions education programs around the medical school, the expansion of class size, the creation of branch campuses and remote teaching sites, an environment that emphasizes teaching over research, and limited involvement in facilities providing clinical services to patients. There is institutional ownership of preclinical instruction, but clinical instruction occurs in affiliated hospitals and medical institutions where students are typically taught by volunteer and/or adjunct faculty.Between 2003 and 2013, this <span class="hlt">model</span> attracted smaller universities and organizations, which implemented the strategies of established private COMs in initiating new private COMs, branch campuses, and remote teaching sites. The new COMs have introduced changes to the osteopathic profession and private COM <span class="hlt">model</span> by expanding to new parts of the country and establishing the first for-profit medical school accredited in the United States in modern times. They have also increased pressure on the system of osteopathic graduate medical education, as the number of funded GME positions available to their graduates is less than the need. PMID:26039139</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013M%26PS...48..515S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013M%26PS...48..515S"><span id="translatedtitle">Ries crater and suevite <span class="hlt">revisited</span>Observations and <span class="hlt">modeling</span> Part I: Observations</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Stffler, Dieter; Artemieva, Natalia A.; Wnnemann, Kai; Reimold, W. Uwe; Jacob, Juliane; Hansen, Birgit K.; Summerson, Iona A. T.</p> <p>2013-04-01</p> <p>We report results of an interdisciplinary project devoted to the 26 km-diameter Ries crater and to the genesis of suevite. Recent laboratory analyses of "crater suevite" occurring within the central crater basin and of "outer suevite" on top of the continuous ejecta blanket, as well as data accumulated during the past 50 years, are interpreted within the boundary conditions imposed by a comprehensive new effort to <span class="hlt">model</span> the crater formation and its ejecta deposits by computer code calculations (Artemieva et al. 2013). The properties of suevite are considered on all scales from megascopic to submicroscopic in the context of its geological setting. In a new approach, we reconstruct the minimum/maximum volumes of all allochthonous impact formations (108/116 km3), of suevite (14/22 km3), and the total volume of impact melt (4.9/8.0 km3) produced by the Ries impact event prior to erosion. These volumes are reasonably compatible with corresponding values obtained by numerical <span class="hlt">modeling</span>. Taking all data on modal composition, texture, chemistry, and shock metamorphism of suevite, and the results of <span class="hlt">modeling</span> into account, we arrive at a new empirical <span class="hlt">model</span> implying five main consecutive phases of crater formation and ejecta emplacement. Numerical <span class="hlt">modeling</span> indicates that only a very small fraction of suevite can be derived from the "primary ejecta plume," which is possibly represented by the fine-grained basal layer of outer suevite. The main mass of suevite was deposited from a "secondary plume" induced by an explosive reaction ("fuel-coolant interaction") of impact melt with water and volatile-rich sedimentary rocks within a clast-laden temporary melt pool. Both melt pool and plume appear to be heterogeneous in space and time. Outer suevite appears to be derived from an early formed, melt-rich and clast-poor plume region rich in strongly shocked components (melt ? clasts) and originating from an upper, more marginal zone of the melt pool. Crater suevite is obviously deposited from later formed, clast-rich and melt-poor plumes dominated by unshocked and weakly shocked clasts and derived from a deeper, central zone of the melt pool. Genetically, we distinguish between "primary suevite" which includes dike suevite, the lower sublayer of crater suevite, and possibly a basal layer of outer suevite, and "secondary suevite" represented by the massive upper sublayer of crater suevite and the main mass of outer suevite.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4278622','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4278622"><span id="translatedtitle">The Sugen 5416/hypoxia mouse <span class="hlt">model</span> of pulmonary hypertension <span class="hlt">revisited</span>: long-term follow-up</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Hansmann, Georg; Rose, Chase; Fernandez-Gonzalez, Angeles; Scheid, Annette; Mitsialis, S. Alex; Kourembanas, Stella</p> <p>2014-01-01</p> <p>Abstract The combination of a vascular endothelial growth factor receptor antagonist, Sugen 5416 (SU5416), and chronic hypoxia is known to cause pronounced pulmonary hypertension (PH) with angioobliterative lesions in rats and leads to exaggerated PH in mice as well. We sought to determine whether weekly SU5416 injections during 3 weeks of hypoxia leads to long-term development of angioobliterative lesions and sustained or progressive PH in mice. Male C57BL/6J mice were injected with SU5416 (SuHx) or vehicle (VehHx) weekly during 3 weeks of exposure to 10% oxygen. Echocardiographic and invasive measures of hemodynamics and pulmonary vascular morphometry were performed after the 3-week hypoxic exposure and after 10 weeks of recovery in normoxia. SuHx led to higher right ventricular (RV) systolic pressure and RV hypertrophy than VehHx after 3 weeks of hypoxia. Ten weeks after hypoxic exposure, RV systolic pressure decreased but remained elevated in SuHx mice compared with VehHx or normoxic control mice, but RV hypertrophy had resolved. After 3 weeks of hypoxia and 10 weeks of follow-up in normoxia, tricuspid annular plane systolic excursion was significantly decreased, indicating decreased systolic RV function. Very few angioobliterative lesions were found at the 10-week follow-up time point in SuHx mouse lungs. In conclusion, SU5416 combined with 3 weeks of hypoxia causes a more profound PH phenotype in mice than hypoxia alone. PH persists over 10 weeks of normoxic follow-up in SuHx mice, but significant angioobliterative lesions do not occur, and neither PH nor RV dysfunction worsens. The SuHx mouse <span class="hlt">model</span> is a useful adjunct to other PH <span class="hlt">models</span>, but the search will continue for a mouse <span class="hlt">model</span> that better recapitulates the human phenotype. PMID:25610598</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/23373426','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/23373426"><span id="translatedtitle">Electronegativity, charge transfer, crystal field strength, and the point charge <span class="hlt">model</span> <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Tanner, Peter A; Ning, Lixin</p> <p>2013-02-21</p> <p>Although the optical spectra of LnCl(6)(3-) systems are complex, only two crystal field parameters, B(40) and B(60), are required to <span class="hlt">model</span> the J-multiplet crystal field splittings in octahedral symmetry. It is found that these parameters exhibit R(-5) and R(-7) dependence, respectively, upon the ionic radius Ln(3+)(VI), but not upon the Ln-Cl distance. More generally, the crystal field strengths of LnX(6) systems (X = Br, Cl, F, O) exhibit linear relationships with ligand electronegativity, charge transfer energy, and fractional ionic character of the Ln-X bond. PMID:23373426</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1100784','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1100784"><span id="translatedtitle">Chayanov <span class="hlt">revisited</span>: A <span class="hlt">model</span> for the economics of complex kin units</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Hammel, E. A.</p> <p>2005-01-01</p> <p>Chayanov's <span class="hlt">model</span> of the peasant economy is based on autarkic nuclear family households. Expansion to the more complex households and kin groups common in peasant societies shows that the sharp changes Chayanov observed in the consumer/producer ratio over the domestic cycle are smoothed by the intergenerational structure of complex households and extended kin groups. This amelioration may be retarded by competition between constituent units. Understanding the dynamics of the developmental cycle and micropolitics of domestic groups is a useful correction to Chayanov's widely used formulation, especially in developing countries where complex kin structures are common. PMID:15867158</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006EPJB...51..555C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006EPJB...51..555C"><span id="translatedtitle"><span class="hlt">Revisiting</span> the nonequilibrium phase transition of the triplet-creation <span class="hlt">model</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Cardozo, G. O.; Fontanari, J. F.</p> <p>2006-06-01</p> <p>The nonequilibrium phase transition in the triplet-creation <span class="hlt">model</span> is investigated using critical spreading and the conservative diffusive contact process. The results support the claim that at high enough diffusion the phase transition becomes discontinuous. As the diffusion probability increases the critical exponents change continuously from the ordinary directed percolation (DP) class to the compact directed percolation (CDP). The fractal dimension of the critical cluster, however, switches abruptly between those two universality classes. Strong crossover effects in both methods make it difficult, if not impossible, to establish the exact location of the tricritical point.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/799014','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/799014"><span id="translatedtitle">Precision Measurements and Fermion Geography in the Randall-Sundrum <span class="hlt">Model</span> <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Petriello, Frank J</p> <p>2002-03-08</p> <p>We re-examine the implications of allowing fermion fields to propagate in the five-dimensional bulk of the Randall-Sundrum (RS) localized gravity <span class="hlt">model</span>. We find that the large mixing between the Standard <span class="hlt">Model</span> top quark and its Kaluza Klein excitations restricts the fundamental RS scale to lie above 100 TeV. To circumvent this difficulty we propose a ''mixed'' scenario which localizes the third generation fermions on the TeV brane and allows the lighter generations to propagate in the full five-dimensional bulk. We show that this construction naturally reproduces the observed m{sub c}/m{sub t} and m{sub s}/m{sub b} hierarchies. We explore the signatures of this scenario in precision measurements and future high energy experiments. We find that the same region of parameter space that addresses the hierarchies of fermion Yukawa couplings also permits a Higgs boson with a mass of 500 GeV, and remains otherwise invisible at the LHC; however, the entire parameter region consistent with the electroweak precision data is testable at future linear colliders. We briefly discuss possible constraints on this scenario arising from flavor changing neutral currents.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016PhRvB..93h5108M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016PhRvB..93h5108M"><span id="translatedtitle">Spectral function of the Tomonaga-Luttinger <span class="hlt">model</span> <span class="hlt">revisited</span>: Power laws and universality</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Markhof, L.; Meden, V.</p> <p>2016-02-01</p> <p>We reinvestigate the momentum-resolved single-particle spectral function of the Tomonaga-Luttinger <span class="hlt">model</span>. In particular, we focus on the role of the momentum dependence of the two-particle interaction V (q ) . Usually, V (q ) is assumed to be a constant and integrals are regularized in the ultraviolet "by hand" employing an ad hoc procedure. As the momentum dependence of the interaction is irrelevant in the renormalization group sense, this does not affect the universal low-energy properties of the <span class="hlt">model</span>, e.g., exponents of power laws, if all energy scales are sent to zero. If, however, the momentum k is fixed away from the Fermi momentum kF, with |k - kF| setting a nonvanishing energy scale, the details of V (q ) start to matter. We provide strong evidence that any curvature of the two-particle interaction at small transferred momentum q destroys power-law scaling of the momentum-resolved spectral function as a function of energy. Even for |k - kF| much smaller than the momentum-space range of the interaction the spectral line shape depends on the details of V (q ) . The significance of our results for universality in the Luttinger liquid sense, for experiments on quasi-one-dimensional metals, and for recent results on the spectral function of one-dimensional correlated systems taking effects of the curvature of the single-particle dispersion into account ("nonlinear LL phenomenology") is discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3166726','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3166726"><span id="translatedtitle">Deconvolution-Based CT and MR Brain Perfusion Measurement: Theoretical <span class="hlt">Model</span> <span class="hlt">Revisited</span> and Practical Implementation Details</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Fieselmann, Andreas; Kowarschik, Markus; Ganguly, Arundhuti; Hornegger, Joachim; Fahrig, Rebecca</p> <p>2011-01-01</p> <p>Deconvolution-based analysis of CT and MR brain perfusion data is widely used in clinical practice and it is still a topic of ongoing research activities. In this paper, we present a comprehensive derivation and explanation of the underlying physiological <span class="hlt">model</span> for intravascular tracer systems. We also discuss practical details that are needed to properly implement algorithms for perfusion analysis. Our description of the practical computer implementation is focused on the most frequently employed algebraic deconvolution methods based on the singular value decomposition. In particular, we further discuss the need for regularization in order to obtain physiologically reasonable results. We include an overview of relevant preprocessing steps and provide numerous references to the literature. We cover both CT and MR brain perfusion imaging in this paper because they share many common aspects. The combination of both the theoretical as well as the practical aspects of perfusion analysis explicitly emphasizes the simplifications to the underlying physiological <span class="hlt">model</span> that are necessary in order to apply it to measured data acquired with current CT and MR scanners. PMID:21904538</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3203462','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3203462"><span id="translatedtitle">A quantitative <span class="hlt">model</span> for cyclin-dependent kinase control of the cell cycle: <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Uhlmann, Frank; Bouchoux, Céline; López-Avilés, Sandra</p> <p>2011-01-01</p> <p>The eukaryotic cell division cycle encompasses an ordered series of events. Chromosomal DNA is replicated during S phase of the cell cycle before being distributed to daughter cells in mitosis. Both S phase and mitosis in turn consist of an intricately ordered sequence of molecular events. How cell cycle ordering is achieved, to promote healthy cell proliferation and avert insults on genomic integrity, has been a theme of Paul Nurse's research. To explain a key aspect of cell cycle ordering, sequential S phase and mitosis, Stern & Nurse proposed ‘A quantitative <span class="hlt">model</span> for cdc2 control of S phase and mitosis in fission yeast’. In this <span class="hlt">model</span>, S phase and mitosis are ordered by their dependence on increasing levels of cyclin-dependent kinase (Cdk) activity. Alternative mechanisms for ordering have been proposed that rely on checkpoint controls or on sequential waves of cyclins with distinct substrate specificities. Here, we review these ideas in the light of experimental evidence that has meanwhile accumulated. Quantitative Cdk control emerges as the basis for cell cycle ordering, fine-tuned by cyclin specificity and checkpoints. We propose a molecular explanation for quantitative Cdk control, based on thresholds imposed by Cdk-counteracting phosphatases, and discuss its implications. PMID:22084384</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=20040088889&hterms=STARCH&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3DSTARCH','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=20040088889&hterms=STARCH&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D50%26Ntt%3DSTARCH"><span id="translatedtitle">Columella cells <span class="hlt">revisited</span>: novel structures, novel properties, and a novel gravisensing <span class="hlt">model</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Staehelin, L. A.; Zheng, H. Q.; Yoder, T. L.; Smith, J. D.; Todd, P.</p> <p>2000-01-01</p> <p>A hundred years of research has not produced a clear understanding of the mechanism that transduces the energy associated with the sedimentation of starch-filled amyloplast statoliths in root cap columella cells into a growth response. Most <span class="hlt">models</span> postulate that the statoliths interact with microfilaments (MF) to transmit signals to the plasma membrane (or ER), or that sedimentation onto these organelles produces the signals. However, no direct evidence for statolith-MF links has been reported, and no asymmetric structures of columella cells have been identified that might explain how a root turned by 90 degrees knows which side is up. To address these and other questions, we have (1) quantitatively examined the effects of microgravity on the size, number, and spatial distribution of statoliths; (2) re-evaluated the ultrastructure of columella cells in high-pressure frozen/freeze-substituted roots; and (3) followed the sedimentation dynamics of statolith movements in reoriented root tips. The findings have led to the formulation of a new <span class="hlt">model</span> for the gravity-sensing apparatus of roots, which envisages the cytoplasm pervaded by an actin-based cytoskeletal network. This network is denser in the ER-devoid central region of the cell than in the ER-rich cell cortex and is coupled to receptors in the plasma membrane. Statolith sedimentation is postulated to disrupt the network and its links to receptors in some regions of the cell cortex, while allowing them to reform in other regions and thereby produce a directional signal.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013BoLMe.147..301G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013BoLMe.147..301G"><span id="translatedtitle">Urban Morphology Influence on Urban Albedo: A <span class="hlt">Revisit</span> with the S olene <span class="hlt">Model</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Groleau, Dominique; Mestayer, Patrice G.</p> <p>2013-05-01</p> <p>This heuristic study of the urban morphology influence on urban albedo is based on some 3,500 simulations with the S olene <span class="hlt">model</span>. The studied configurations include square blocks in regular and staggered rows, rectangular blocks with different street widths, cross-shaped blocks, infinite street canyons and several actual districts in Marseilles, Toulouse and Nantes, France. The scanned variables are plan density, facade density, building height, layout orientation, latitude, date and time of the day. The sky-view factors of the ground and canopy surfaces are also considered. This study demonstrates the significance of the facade density, in addition to the built plan density, as the explanatory geometrical factor to characterize the urban morphology, rather than building height. On the basis of these albedo calculations the puzzling results of Kondo et al. (Boundary-Layer Meteorol 100:225-242, 2001) for the influence of building height are explained, and the plan density influence is quantitatively assessed. It is shown that the albedo relationship with plan and facade densities obtained with the regular square plot configuration may be considered as a reference for all other configurations, with the exception of the infinite street canyon that shows systematic differences for the lower plan densities. The curves representing this empirical relationship may be used as a sort of abacus for all other geometries while an approximate simple mathematical <span class="hlt">model</span> is proposed, as well as relationships between the albedo and sky-view factors.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011NW.....98..837O','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011NW.....98..837O"><span id="translatedtitle">Parker's sneak-guard <span class="hlt">model</span> <span class="hlt">revisited</span>: why do reproductively parasitic males heavily invest in testes?</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ota, Kazutaka; Kohda, Masanori; Hori, Michio; Sato, Tetsu</p> <p>2011-10-01</p> <p>Alternative reproductive tactics are widespread in males and may cause intraspecific differences in testes investment. Parker's sneak-guard <span class="hlt">model</span> predicts that sneaker males, who mate under sperm competition risk, invest in testes relatively more than bourgeois conspecifics that have lower risk. Given that sneakers are much smaller than bourgeois males, sneakers may increase testes investment to overcome their limited sperm productivity because of their small body sizes. In this study, we examined the mechanism that mediates differential testes investment across tactics in the Lake Tanganyika cichlid fish Lamprologus callipterus. In the Rumonge population of Burundi, bourgeois males are small compared with those in other populations and have a body size close to sneaky dwarf males. Therefore, if differences in relative testis investment depend on sperm competition, the rank order of relative testis investment should be dwarf males > bourgeois males in Rumonge = bourgeois males in the other populations. If differences in relative testis investment depend on body size, the rank order of relative testes investment should be dwarf males > bourgeois males in Rumonge > bourgeois males in the other populations. Comparisons of relative testis investment among the three male groups supported the role of sperm competition, as predicted by the sneak-guard <span class="hlt">model</span>. Nevertheless, the effects of absolute body size on testes investment should be considered to understand the mechanisms underlying intraspecific variation in testes investment caused by alternative reproductive tactics.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2008JCrGr.310.5416V','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2008JCrGr.310.5416V"><span id="translatedtitle"><span class="hlt">Revisiting</span> the constant growth angle: Estimation and verification via rigorous thermal <span class="hlt">modeling</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Virozub, Alexander; Rasin, Igal G.; Brandon, Simon</p> <p>2008-12-01</p> <p>Methods for estimating growth angle ( θgr) values, based on the a posteriori analysis of directionally solidified material (e.g. drops) often involve assumptions of negligible gravitational effects as well as a planar solid/liquid interface during solidification. We relax both of these assumptions when using experimental drop shapes from the literature to estimate the relevant growth angles at the initial stages of solidification. Assumed to be constant, we use these values as input into a rigorous heat transfer and solidification <span class="hlt">model</span> of the growth process. This <span class="hlt">model</span>, which is shown to reproduce the experimental shape of a solidified sessile water drop using the literature value of θgr=0∘, yields excellent agreement with experimental profiles using our estimated values for silicon ( θgr=10∘) and germanium ( θgr=14.3∘) solidifying on an isotropic crystalline surface. The effect of gravity on the solidified drop shape is found to be significant in the case of germanium, suggesting that gravity should either be included in the analysis or that care should be taken that the relevant Bond number is truly small enough in each measurement. The planar solidification interface assumption is found to be unjustified. Although this issue is important when simulating the inflection point in the profile of the solidified water drop, there are indications that solidified drop shapes (at least in the case of silicon) may be fairly insensitive to the shape of this interface.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014LaPhy..24l5502A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014LaPhy..24l5502A"><span id="translatedtitle"><span class="hlt">Revisiting</span> the capture velocity of a cesium magneto-optical trap: <span class="hlt">model</span>, simulation and experiment</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Anwar, Muhammad; Magalhães, Daniel V.; Müller, Stella T.; Faisal, Muhammad; Nawaz, Muhammad; Ahmed, Mushtaq</p> <p>2014-12-01</p> <p>In this work, we have explored ab initio the capture process in a magneto-optical trap by theory, simulation and experiment. We measured the capture velocity vc of a cesium vapor cell magneto-optical trap (VCMOT) from its capture rate R and developed an exact <span class="hlt">model</span> for the capture rate of a VCMOT in terms of its capture velocity, background density and trap laser beam diameter. We measured the capture velocity of a cesium VCMOT for various trap laser intensities and magnetic field gradients. We observed that the capture velocity is a damping force as well as a restoring force phenomenon. We supported our findings by performing simulations for single atom trajectories in a 1D cesium MOT. Finally, we concluded that two MOTs can have the same capture velocities but very different capture rates, thereby revealing that these are two fundamentally different characteristics of the MOT.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007PhRvE..76a1104S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007PhRvE..76a1104S"><span id="translatedtitle">Ehrenfest urn <span class="hlt">revisited</span>: Playing the game on a realistic fluid <span class="hlt">model</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Scalas, Enrico; Martin, Edgar; Germano, Guido</p> <p>2007-07-01</p> <p>The Ehrenfest urn process, also known as the dogs and fleas <span class="hlt">model</span>, is realistically simulated by molecular dynamics of the Lennard-Jones fluid. The key variable is Δz —i.e., the absolute value of the difference between the number of particles in one half of the simulation box and in the other half. This is a pure-jump stochastic process induced, under coarse graining, by the deterministic time evolution of the atomic coordinates. We discuss the Markov hypothesis by analyzing the statistical properties of the jumps and the waiting times between the jumps. In the limit of a vanishing integration time step, the distribution of waiting times becomes closer to an exponential and, therefore, the continuous-time jump stochastic process is Markovian. The random variable Δz behaves as a Markov chain and, in the gas phase, the observed transition probabilities follow the predictions of the Ehrenfest theory.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22255185','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22255185"><span id="translatedtitle"><span class="hlt">Revisiting</span> density functionals for the primitive <span class="hlt">model</span> of electric double layers</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Jiang, Jian; Department of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029 ; Cao, Dapeng E-mail: doug@chem.byu.edu; Henderson, Douglas E-mail: doug@chem.byu.edu; Wu, Jianzhong E-mail: doug@chem.byu.edu</p> <p>2014-01-28</p> <p>Density functional theory (DFT) calculations are typically based on approximate functionals that link the free energy of a multi-body system of interest with the underlying one-body density distributions. Whereas good performance is often proclaimed for new developments, it is difficult to vindicate the theoretical merits relative to alternative versions without extensive comparison with the numerical results from molecular simulations. Besides, approximate functionals may defy statistical-mechanical sum rules and result in thermodynamic inconsistency. Here we compare systematically several versions of density functionals for ionic distributions near a charged surface using the primitive <span class="hlt">model</span> of electric double layers. We find that the theoretical performance is sensitive not only to the specific forms of the density functional but also to the range of parameter space and the precise properties under consideration. In general, incorporation of the thermodynamic sum rule into the DFT calculations shows significant improvements for both electrochemical properties and ionic distributions.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li class="active"><span>8</span></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_8 --> <div id="page_9" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li class="active"><span>9</span></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="161"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3995688','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3995688"><span id="translatedtitle">Intuitive Logic <span class="hlt">Revisited</span>: New Data and a Bayesian Mixed <span class="hlt">Model</span> Meta-Analysis</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Singmann, Henrik; Klauer, Karl Christoph; Kellen, David</p> <p>2014-01-01</p> <p>Recent research on syllogistic reasoning suggests that the logical status (valid vs. invalid) of even difficult syllogisms can be intuitively detected via differences in conceptual fluency between logically valid and invalid syllogisms when participants are asked to rate how much they like a conclusion following from a syllogism (Morsanyi & Handley, 2012). These claims of an intuitive logic are at odds with most theories on syllogistic reasoning which posit that detecting the logical status of difficult syllogisms requires effortful and deliberate cognitive processes. We present new data replicating the effects reported by Morsanyi and Handley, but show that this effect is eliminated when controlling for a possible confound in terms of conclusion content. Additionally, we reanalyze three studies () without this confound with a Bayesian mixed <span class="hlt">model</span> meta-analysis (i.e., controlling for participant and item effects) which provides evidence for the null-hypothesis and against Morsanyi and Handley's claim. PMID:24755777</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016MNRAS.456.1837S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016MNRAS.456.1837S"><span id="translatedtitle"><span class="hlt">Revisiting</span> the ultraluminous supersoft source in M 101: an optically thick outflow <span class="hlt">model</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Soria, Roberto; Kong, Albert</p> <p>2016-02-01</p> <p>The M 101 galaxy contains the best-known example of an ultraluminous supersoft source (ULS), dominated by a thermal component at kT ≈ 0.1 keV. The origin of the thermal component and the relation between ULSs and standard (broad-band spectrum) ultraluminous X-ray sources are still controversial. We re-examined the X-ray spectral and timing properties of the M 101 ULS using archival Chandra and XMM-Newton observations. We show that the X-ray time-variability and spectral properties are inconsistent with standard-disc emission. The characteristic radius Rbb of the thermal emitter varies from epoch to epoch between ≈10 000 and ≈100 000 km; the colour temperature kTbb varies between ≈50 and ≈140 eV and the two quantities scale approximately as R_bb ∝ T_bb^{-2}. In addition to the smooth continuum, we also find (at some epochs) spectral residuals well fitted with thermal-plasma <span class="hlt">models</span> and absorption edges: we interpret this as evidence that we are looking at a clumpy, multitemperature outflow. We suggest that at sufficiently high accretion rates and inclination angles, the supercritical, radiatively driven outflow becomes effectively optically thick and completely thermalizes the harder X-ray photons from the inner part of the inflow, removing the hard spectral tail. We develop a simple, spherically symmetric outflow <span class="hlt">model</span> and show that it is consistent with the observed temperatures, radii and luminosities. A larger, cooler photosphere shifts the emission peak into the far-UV and makes the source dimmer in X-rays but possibly ultraluminous in the UV. We compare our results and interpretation with those of Liu et al.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://pubs.er.usgs.gov/publication/70009721','USGSPUBS'); return false;" href="http://pubs.er.usgs.gov/publication/70009721"><span id="translatedtitle"><span class="hlt">Revisiting</span> classic water erosion <span class="hlt">models</span> in drylands: The strong impact of biological soil crusts</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Bowker, M.A.; Belnap, J.; Bala, Chaudhary V.; Johnson, N.C.</p> <p>2008-01-01</p> <p>Soil erosion and subsequent degradation has been a contributor to societal collapse in the past and is one of the major expressions of desertification in arid regions. The revised universal soil loss equation (RUSLE) <span class="hlt">models</span> soil lost to water erosion as a function of climate erosivity (the degree to which rainfall can result in erosion), topography, soil erodibility, and land use/management. The soil erodibility factor (K) is primarily based upon inherent soil properties (those which change slowly or not at all) such as soil texture and organic matter content, while the cover/management factor (C) is based on several parameters including biological soil crust (BSC) cover. We examined the effect of two more precise indicators of BSC development, chlorophyll a and exopolysaccharides (EPS), upon soil stability, which is closely inversely related to soil loss in an erosion event. To examine the relative influence of these elements of the C factor to the K factor, we conducted our investigation across eight strongly differing soils in the 0.8 million ha Grand Staircase-Escalante National Monument. We found that within every soil group, chlorophyll a was a moderate to excellent predictor of soil stability (R2 = 0.21-0.75), and consistently better than EPS. Using a simple structural equation <span class="hlt">model</span>, we explained over half of the variance in soil stability and determined that the direct effect of chlorophyll a was 3?? more important than soil group in determining soil stability. Our results suggest that, holding the intensity of erosive forces constant, the acceleration or reduction of soil erosion in arid landscapes will primarily be an outcome of management practices. This is because the factor which is most influential to soil erosion, BSC development, is also among the most manageable, implying that water erosion in drylands has a solution. ?? 2008 Elsevier Ltd.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015IREdu..61...79J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015IREdu..61...79J"><span id="translatedtitle">Pathways from adult education to well-being: The Tuijnman <span class="hlt">model</span> <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Jenkins, Andrew; Wiggins, Richard D.</p> <p>2015-02-01</p> <p>There is a growing interest among researchers and policy-makers in the influence of adult learning on a range of outcomes, notably health and well-being. Much of the research to date has tended to focus on younger adults and the immediate benefits of course participation. The longer-term outcomes, such as the potential of accumulated learning experience for enriching later life, have been neglected. The study presented in this article adopts a lifecourse approach to participation in learning and the potential benefits of learning. The authors concentrate on adult education in mid-life, that is between the ages of 33 and 50, as the measure of learning participation. Their research draws upon previous work conducted by Albert Tuijnman which used Swedish data and which was published a quarter of a century ago in the pages of the International Review of Education. The authors of this paper seek to replicate and extend his pioneering work, using data from the National Child Development Study (NCDS), a large-scale survey containing information on all those born in Britain in one week in 1958. Follow-up data were collected at various points in childhood and adulthood, most recently when the cohort reached the age of 50, thus enabling insights into long-term developments. The authors analyse well-being at age 50 as an outcome in structural equation <span class="hlt">models</span> (SEM). This approach helps to understand the pathways through which adult education has an impact on well-being. The estimated <span class="hlt">models</span> show how adult education in mid-life has an influence on the type and quality of jobs which are accessible to individuals, and how this in turn can contribute to higher well-being at age 50.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013EPSC....8..528K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013EPSC....8..528K"><span id="translatedtitle">Sulfur in the Early Martian Atmosphere <span class="hlt">Revisited</span>: Experiments with a 3-D Global Climate <span class="hlt">Model</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kerber, L.; Forget, F.; Wordsworth, R.</p> <p>2013-09-01</p> <p>Data returned from the surface of Mars during the 1970s revealed intriguing geological evidence for a warmer and wetter early martian climate. Dendritic valley networks were discovered by Mariner 9 on ancient Noachian terrain [1], indicating that liquid water had flowed across the surface in the distant past. Since this time, geological investigations into early Martian history have attempted to ascertain the nature and level of activity of the early Martian hydrological cycle [e.g. 2-5] while atmospheric <span class="hlt">modeling</span> efforts have focused on how the atmosphere could be warmed to temperatures great enough to sustain such activity [see 6-7 for reviews]. Geological and spectroscopic investigations have refined the history and chronology of Noachian Mars over time, and circulation of liquid water has been invoked to explain several spatially and temporally distinct morphological and chemical signatures found in the geological record. Detections of iron and magnesium-rich clays are widespread in the oldest Martian terrains, suggesting a period of pH-neutral aqueous alteration [e.g., 8]. Valley network incision also took place during the Noachian period [9]. Some chains of river valleys and craters lakes extend for thousands of kilometers, suggesting temperatures at least clement enough for sustained ice-covered flow [3,10]. The commencement of valley network incision is not well constrained, but the period of Mg/Fe clay formation appears to have ended before the termination of valley network formation, as the visible fluvial systems appear to have remobilized existing clays rather than forming them [5,8]. There is also evidence that the cessation of valley network formation was abrupt [11]. Towards the end of the Noachian, erosion rates appear to have been significantly higher than during subsequent periods, a process that has also been attributed to aqueous processes [12]. A period of sulfate formation followed, likely characterized by acidic, evaporitic playa environments [8]. A successful working <span class="hlt">model</span> for the early Martian atmosphere and hydrosphere must be able not only to produce conditions suitable for liquid water at the surface, but also to explain how the nature of this aqueous activity changed over time and eventually diminished. There are two major end-member hypotheses: first, that early Mars was wet and warm, with a sustained greenhouse that made it possible for liquid water to be stable on the surface for extended periods [e.g., 2, 12-14], and second, that early Mars was generally cold, and that most of the aqueous alteration took place underground [3,5] or during transient warm periods tied to impact cratering [15], or volcanism [16]. In both of these scenarios it is generally agreed that in order to make valley networks and sulfate deposits, a hydrological cycle is needed which is able to recycle water from the lowlands back to the highlands (i.e., the one-time emptying of a regional aquifer would not be sufficient to create the observed features) [4,17]. This would require some precipitation to fall on the southern highlands, either flowing overland or filtering into groundwater aquifers. In both cases, volcanic gases (especially SO2) have been suggested as a possible way of creating either a sustained or transient greenhouse. Several researchers have tested the addition of SO2 to climate <span class="hlt">models</span> in order to assess whether it would provide an adequate amount of greenhouse warming to allow liquid water to flow across the surface [18-21], with differing results. Postawko and Kuhn [18] found a warming effect of 14 K in a 0.1 bar atmosphere with an SO2 abundance of 1000 ppm. Johnson et al. [20] used a 3-D global circulation <span class="hlt">model</span> and found a warming of 15-25 K for 245 ppm of SO2 in a dry 0.5 bar atmosphere. Tian et al. [21] used a 1-D <span class="hlt">model</span> to explore a wide range of SO2 mixing values and CO2 partial pressures, finding a warming of around ~25 K for 100 ppm in a 0.5 bar atmosphere with a fully saturated troposphere (~40 K for a 1 bar atmosphere). These authors also included the effect of sulfate aerosol particles, which caused a dramatic cooling effect which more than canceled the warming caused by the SO2 gas [21]. Here we reconsider the efficacy of a sulfurinduced greenhouse in early Noachian history using the LMD (Laboratoire de Météorologie Dynamique) 3-D Generic Climate <span class="hlt">Model</span> (LMD-GCM), exploring the effects of SO2, H2S, and sulfate and S8 aerosols on the surface temperature, and the expected photochemical lifetime of SO2 in the atmosphere.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/769210','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/769210"><span id="translatedtitle">EQUATION OF STATE AND HUGONIOT LOCUS FOR POROUS MATERIALS: P-ALPHA <span class="hlt">MODEL</span> <span class="hlt">REVISITED</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>R. MENIKOFF; ET AL</p> <p>1999-08-01</p> <p>Foams, porous solids and granular materials have a characteristic Hugoniot locus that for weak shocks is concave in the (particle velocity, shock velocity)-plane. An equation of state (EOS) that has this property can be constructed implicitly from a Helmholtz free energy of the form {Psi}{sub s}(V,T,{phi}) = {Psi}{sub s}(V,T)+B({phi}) where the equilibrium volume fraction {phi}{sub eq} is determined by minimizing {Psi}, i.e., the condition {partial_derivative}{sub {psi}} {Psi} = 0. For many cases, a Hayes EOS for the pure solid {Psi}{sub s}(V,T) is adequate. This provides a thermodynamically consistent framework for the P-{alpha} <span class="hlt">model</span>. For this form of EOS the volume fraction has a similar effect to an endothermic reaction in that the partial Hugoniot loci with fixed {psi} are shifted to the left in the (V,P)-plane with increasing f. The equilibrium volume fraction can then be chosen to match the concavity of the principal Hugoniot locus. An example is presented for the polymer estane. A small porosity of only 1.4 percent is required to match the experimental concavity in the Hugoniot data. This type of EOS can also be used to obtain the so-called ''universal'' Hugoniot for liquids.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25099516','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25099516"><span id="translatedtitle"><span class="hlt">Models</span> and mechanisms of Hofmeister effects in electrolyte solutions, and colloid and protein systems <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Salis, Andrea; Ninham, Barry W</p> <p>2014-11-01</p> <p>Specific effects of electrolytes have posed a challenge since the 1880's. The pioneering work was that of Franz Hofmeister who studied specific salt induced protein precipitation. These effects are the rule rather the exception and are ubiquitous in chemistry and biology. Conventional electrostatic theories (Debye-Hückel, DLVO, etc.) cannot explain such effects. Over the past decades it has been recognised that additional quantum mechanical dispersion forces with associated hydration effects acting on ions are missing from theory. In parallel Collins has proposed a phenomenological set of rules (the law of matching water affinities, LMWA) which explain and bring to order the order of ion-ion and ion-surface site interactions at a qualitative level. The two approaches appear to conflict. Although the need for inclusion of quantum dispersion forces in one form or another is not questioned, the <span class="hlt">modelling</span> has often been misleading and inappropriate. It does not properly describe the chemical nature (kosmotropic/chaotropic or hard/soft) of the interacting species. The success of the LMWA rules lies in the fact that they do. Here we point to the way that the two apparently opposing approaches might be reconciled. Notwithstanding, there are more challenges, which deal with the effect of dissolved gas and its connection to 'hydrophobic' interactions, the problem of water at different temperatures and 'water structure' in the presence of solutes. They take us to another dimension that requires the rebuilding of theoretical foundations. PMID:25099516</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4595741','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4595741"><span id="translatedtitle"><span class="hlt">Revisiting</span> the chlorophyll biosynthesis pathway using genome scale metabolic <span class="hlt">model</span> of Oryza sativa japonica</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Chatterjee, Ankita; Kundu, Sudip</p> <p>2015-01-01</p> <p>Chlorophyll is one of the most important pigments present in green plants and rice is one of the major food crops consumed worldwide. We curated the existing genome scale metabolic <span class="hlt">model</span> (GSM) of rice leaf by incorporating new compartment, reactions and transporters. We used this modified GSM to elucidate how the chlorophyll is synthesized in a leaf through a series of bio-chemical reactions spanned over different organelles using inorganic macronutrients and light energy. We predicted the essential reactions and the associated genes of chlorophyll synthesis and validated against the existing experimental evidences. Further, ammonia is known to be the preferred source of nitrogen in rice paddy fields. The ammonia entering into the plant is assimilated in the root and leaf. The focus of the present work is centered on rice leaf metabolism. We studied the relative importance of ammonia transporters through the chloroplast and the cytosol and their interlink with other intracellular transporters. Ammonia assimilation in the leaves takes place by the enzyme glutamine synthetase (GS) which is present in the cytosol (GS1) and chloroplast (GS2). Our results provided possible explanation why GS2 mutants show normal growth under minimum photorespiration and appear chlorotic when exposed to air. PMID:26443104</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26443104','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26443104"><span id="translatedtitle"><span class="hlt">Revisiting</span> the chlorophyll biosynthesis pathway using genome scale metabolic <span class="hlt">model</span> of Oryza sativa japonica.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Chatterjee, Ankita; Kundu, Sudip</p> <p>2015-01-01</p> <p>Chlorophyll is one of the most important pigments present in green plants and rice is one of the major food crops consumed worldwide. We curated the existing genome scale metabolic <span class="hlt">model</span> (GSM) of rice leaf by incorporating new compartment, reactions and transporters. We used this modified GSM to elucidate how the chlorophyll is synthesized in a leaf through a series of bio-chemical reactions spanned over different organelles using inorganic macronutrients and light energy. We predicted the essential reactions and the associated genes of chlorophyll synthesis and validated against the existing experimental evidences. Further, ammonia is known to be the preferred source of nitrogen in rice paddy fields. The ammonia entering into the plant is assimilated in the root and leaf. The focus of the present work is centered on rice leaf metabolism. We studied the relative importance of ammonia transporters through the chloroplast and the cytosol and their interlink with other intracellular transporters. Ammonia assimilation in the leaves takes place by the enzyme glutamine synthetase (GS) which is present in the cytosol (GS1) and chloroplast (GS2). Our results provided possible explanation why GS2 mutants show normal growth under minimum photorespiration and appear chlorotic when exposed to air. PMID:26443104</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22130987','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22130987"><span id="translatedtitle">THERMAL NON-EQUILIBRIUM <span class="hlt">REVISITED</span>: A HEATING <span class="hlt">MODEL</span> FOR CORONAL LOOPS</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Lionello, Roberto; Linker, Jon A.; Mikic, Zoran; Winebarger, Amy R.; Mok, Yung E-mail: linkerj@predsci.com E-mail: amy.r.winebarger@nasa.gov</p> <p>2013-08-20</p> <p>The location and frequency of events that heat the million-degree corona are still a matter of debate. One potential heating scenario is that the energy release is effectively steady and highly localized at the footpoints of coronal structures. Such an energy deposition drives thermal non-equilibrium solutions in the hydrodynamic equations in longer loops. This heating scenario was considered and discarded by Klimchuk et al. on the basis of their one-dimensional simulations as incapable of reproducing observational characteristics of loops. In this paper, we use three-dimensional simulations to generate synthetic emission images, from which we select and analyze six loops. The main differences between our <span class="hlt">model</span> and that of Klimchuk et al. concern (1) dimensionality, (2) resolution, (3) geometrical properties of the loops, (4) heating function, and (5) radiative function. We find evidence, in this small set of simulated loops, that the evolution of the light curves, the variation of temperature along the loops, the density profile, and the absence of small-scale structures are compatible with the characteristics of observed loops. We conclude that quasi-steady footpoint heating that drives thermal non-equilibrium solutions cannot yet be ruled out as a viable heating scenario for EUV loops.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/197560','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/197560"><span id="translatedtitle">An integrative <span class="hlt">model</span> for the treatment of psychosomatic disorders. The place of sleep and dreams <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Warnes, H</p> <p></p> <p>The functions and dysfunctions of slow wave sleep and of REM sleep and its associated dreams have a tremendous significance in understanding the psychosomatic <span class="hlt">model</span> of illness and in establishing preventive strategies. Ten patients suffering from a variety of psychosomatic illnessess spent 3-4 nights sleeping at the Dream Laboratory. A psychiatric evaluation was carried out and those suffering from schizophrenia, severe depression, acute stage of physical illness and organic deficits were not accepted for the study. It was postulated that increased psychosomatic 'penetrance' as measured by poverty of fantasy life, feelings of helplessness, absence of dream reports, vacant and contrived emotional expression and poor psychological mindedness would be correlated with psychological test results (IPAT anxiety Scale and Zung Depression Rating Scale), manifest dream content analysis and particular REM and stage 4 deficit. The higher psychosomatic 'penetrance' in our study was not found in all patients with a psychosomatic diagnosis but rather in those patients suffering from ulcerative colitis. The degree of 'penetrance' was related to specific physiological, psychological and interpersonal parameters. Based on these findings a spectrum of clinical and physiological criteria of selection for particular therapeutic intervention was presented. PMID:197560</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016AIPC.1720c0002H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016AIPC.1720c0002H"><span id="translatedtitle">CGL description <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hunana, P.; Zank, G. P.; Goldstein, M. L.; Webb, G. M.; Adhikari, L.</p> <p>2016-03-01</p> <p>Solar wind observational studies have emphasized that the solar wind plasma data is bounded by the mirror and firehose instabilities, and it is often believed that these instabilities are of a purely kinetic nature. The simplest fluid <span class="hlt">model</span> that generalizes magnetohydrodynamics with anisotropic temperatures is the Chew-Goldberger-Low <span class="hlt">model</span> (CGL). Here we briefly <span class="hlt">revisit</span> the CGL description and discuss its (otherwise well-documented) linear firehose and mirror instability thresholds; namely that the firehose instability threshold is identical to the one found from linear kinetic theory and that the mirror threshold contains a factor of 6 error. We consider a simple higher-order fluid <span class="hlt">model</span> with time dependent heat flux equations and show that the mirror instability threshold is correctly reproduced. We also present fully nonlinear three-dimensional simulations of freely decaying turbulence for the Hall-CGL <span class="hlt">model</span> with isothermal electrons. The spatial resolution of these simulations is 5123 and the formation of a spectral break in magnetic and velocity field spectra around the proton inertial length is found.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2585069','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2585069"><span id="translatedtitle">Fibronectin Unfolding <span class="hlt">Revisited</span>: <span class="hlt">Modeling</span> Cell Traction-Mediated Unfolding of the Tenth Type-III Repeat</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Gee, Elaine P. S.; Ingber, Donald E.; Stultz, Collin M.</p> <p>2008-01-01</p> <p>Fibronectin polymerization is essential for the development and repair of the extracellular matrix. Consequently, deciphering the mechanism of fibronectin fibril formation is of immense interest. Fibronectin fibrillogenesis is driven by cell-traction forces that mechanically unfold particular modules within fibronectin. Previously, mechanical unfolding of fibronectin has been <span class="hlt">modeled</span> by applying tensile forces at the N- and C-termini of fibronectin domains; however, physiological loading is likely focused on the solvent-exposed RGD loop in the 10th type-III repeat of fibronectin (10FNIII), which mediates binding to cell-surface integrin receptors. In this work we used steered molecular dynamics to study the mechanical unfolding of 10FNIII under tensile force applied at this RGD site. We demonstrate that mechanically unfolding 10FNIII by pulling at the RGD site requires less work than unfolding by pulling at the N- and C- termini. Moreover, pulling at the N- and C-termini leads to 10FNIII unfolding along several pathways while pulling on the RGD site leads to a single exclusive unfolding pathway that includes a partially unfolded intermediate with exposed hydrophobic N-terminal β-strands – residues that may facilitate fibronectin self-association. Additional mechanical unfolding triggers an essential arginine residue, which is required for high affinity binding to integrins, to move to a position far from the integrin binding site. This cell traction-induced conformational change may promote cell detachment after important partially unfolded kinetic intermediates are formed. These data suggest a novel mechanism that explains how cell-mediated forces promote fibronectin fibrillogenesis and how cell surface integrins detach from newly forming fibrils. This process enables cells to bind and unfold additional fibronectin modules – a method that propagates matrix assembly. PMID:19020673</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/24945668','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/24945668"><span id="translatedtitle">Meta-analytic connectivity <span class="hlt">modeling</span> <span class="hlt">revisited</span>: controlling for activation base rates.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Langner, Robert; Rottschy, Claudia; Laird, Angela R; Fox, Peter T; Eickhoff, Simon B</p> <p>2014-10-01</p> <p>Co-activation of distinct brain regions is a measure of functional interaction, or connectivity, between those regions. The co-activation pattern of a given region can be investigated using seed-based activation likelihood estimation meta-analysis of functional neuroimaging data stored in databases such as BrainMap. This method reveals inter-regional functional connectivity by determining brain regions that are consistently co-activated with a given region of interest (the "seed") across a broad range of experiments. In current implementations of this meta-analytic connectivity <span class="hlt">modeling</span> (MACM), significant spatial convergence (i.e. consistent co-activation) is distinguished from noise by comparing it against an unbiased null-distribution of random spatial associations between experiments according to which all gray-matter voxels have the same chance of convergence. As the a priori probability of finding activation in different voxels markedly differs across the brain, computing such a quasi-rectangular null-distribution renders the detection of significant convergence more likely in those voxels that are frequently activated. Here, we propose and test a modified MACM approach that takes this activation frequency bias into account. In this new specific co-activation likelihood estimation (SCALE) algorithm, a null-distribution is generated that reflects the base rate of reporting activation in any given voxel and thus equalizes the a priori chance of finding across-study convergence in each voxel of the brain. Using four exemplary seed regions (right visual area V4, left anterior insula, right intraparietal sulcus, and subgenual cingulum), our tests corroborated the enhanced specificity of the modified algorithm, indicating that SCALE may be especially useful for delineating distinct core networks of co-activation. PMID:24945668</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010MNRAS.402.1141G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010MNRAS.402.1141G"><span id="translatedtitle"><span class="hlt">Revisiting</span> 2D numerical <span class="hlt">models</span> for the 19th century outbursts of η Carinae</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>González, R. F.; Villa, A. M.; Gómez, G. C.; de Gouveia Dal Pino, E. M.; Raga, A. C.; Cantó, J.; Velázquez, P. F.; de La Fuente, E.</p> <p>2010-02-01</p> <p>We present here new results of two-dimensional hydrodynamical simulations of the eruptive events of the 1840s (the great) and the 1890s (the minor) eruptions suffered by the massive star η Carinae (Car). The two bipolar nebulae commonly known as the Homunculus and the little Homunculus (LH) were formed from the interaction of these eruptive events with the underlying stellar wind. We assume here an interacting, non-spherical multiple-phase wind scenario to explain the shape and the kinematics of both Homunculi, but adopt a more realistic parametrization of the phases of the wind. During the 1890s eruptive event, the outflow speed decreased for a short period of time. This fact suggests that the LH is formed when the eruption ends, from the impact of the post-outburst η Car wind (that follows the 1890s event) with the eruptive flow (rather than by the collision of the eruptive flow with the pre-outburst wind, as claimed in previous <span class="hlt">models</span>; González et al.). Our simulations reproduce quite well the shape and the observed expansion speed of the large Homunculus. The LH (which is embedded within the large Homunculus) becomes Rayleigh-Taylor unstable and develop filamentary structures that resemble the spatial features observed in the polar caps. In addition, we find that the interior cavity between the two Homunculi is partially filled by material that is expelled during the decades following the great eruption. This result may be connected with the observed double-shell structure in the polar lobes of the η Car nebula. Finally, as in previous work, we find the formation of tenuous, equatorial, high-speed features that seem to be related to the observed equatorial skirt of η Car.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006MolPh.104.2901S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006MolPh.104.2901S"><span id="translatedtitle">Zwanzig <span class="hlt">model</span> of multi-component mixtures of biaxial particles: y3 theory <span class="hlt">re-visited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sokolova, E. P.; Tumanyan, N. P.; Vlasov, A. Yu.; Masters, A. J.</p> <p></p> <p>The paper considers the thermodynamic and phase ordering properties of a multi-component Zwanzig mixture of hard rectangular biaxial parallelepipeds. An equation of state (EOS) is derived based on an estimate of the number of arrangements of the particles on a three- dimensional cubic lattice. The methodology is a generalization of the Flory-DiMarzio counting scheme, but, unlike previous work, this treatment is thermodynamically consistent. The results are independent of the order in which particles are placed on the lattice. By taking the limit of zero lattice spacing, a translationally continuous variant of the <span class="hlt">model</span> (the off-lattice variant) is obtained. The EOS is identical to that obtained previously by a wide variety of different approaches. In the off-lattice limit, it corresponds to a third-level y-expansion and, in the case of a binary mixture of square platelets, it also corresponds to the EOS obtained from fundamental measure theory. On the lattice it is identical to the EOS obtained by retaining only complete stars in the virial expansion. The off-lattice theory is used to study binary mixtures of rods (R1 - R2) and binary mixtures of platelets (P1 - P2). The particles were uniaxial, of length (thickness) L and width D. The aspect ratios Γi = Li/Di of the components were kept constant (Γ1R = 15, Γ1P = 1/15 and Γ2R = 150, Γ2P = 1/150), so the second virial coefficient of R1 was identical to P1 and similarly for R2 and P2. The volume ratio of particles 1 and 2, v1/v2, was then varied, with the constraints that viR = viP and ILM0001. Results on nematic-isotropic (N - I) phase coexistence at an infinite dilution of component 2, are qualitatively similar for rods and platelets. At small values of the ratio v1/v2, the addition of component 2 (i.e. a thin rod (e.g. a polymer) or a thin plate) results in the stabilization of the nematic phase. For larger values of v1/v2, however, this effect is reversed and the addition of component 2 destabilizes the nematic. For similar molecular volumes of the two components strong fractionation is observed: shorter rods and thicker platelets congregate in the isotropic phase. In general, the stabilization of the ordered phase and the fractionation between the phases are both weaker in the platelet mixtures. The calculated spinodal curves for isotropic-isotropic demixing are noticeably different between the R1 - R2 and the P1 - P2 systems. The platelet mixtures turn out to be stable with respect to de-mixing up to extremely high densities. The values of the consolute points for the R1 - R2 blends are remarkably similar to those obtained using the Parsons-Lee approximation for bi-disperse mixtures of freely rotating cylinders with similar aspect ratios [S. Varga. A. Galindo, G. Jackson, Mol. Phys., 101, 817 (2003)]. In a number of R1 - R2 mixtures, phase diagrams exhibiting both N - I equilibrium and I - I de-mixing were calculated. The latter is pre-empted by nematic ordering in all the cases studied. Calculations show the possible appearance of azeotropes in the N - I coexistence domain.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015NatPh..11..369S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015NatPh..11..369S"><span id="translatedtitle">Programming <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Schulthess, Thomas C.</p> <p>2015-05-01</p> <p>Writing efficient scientific software that makes best use of the increasing complexity of computer architectures requires bringing together <span class="hlt">modelling</span>, applied mathematics and computer engineering. Physics may help unite these approaches.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2004MNRAS.349....1W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2004MNRAS.349....1W"><span id="translatedtitle">LENSCLEAN <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Wucknitz, O.</p> <p>2004-03-01</p> <p>We discuss the LENSCLEAN algorithm which for a given gravitational lens <span class="hlt">model</span> fits a source brightness distribution to interferometric radio data in a similar way as standard CLEAN does in the unlensed case. The lens <span class="hlt">model</span> parameters can then be varied in order to minimize the residuals and determine the best <span class="hlt">model</span> for the lens mass distribution. Our variant of this method is improved in order to be useful and stable even for high dynamic range systems with nearly degenerated lens <span class="hlt">model</span> parameters. Our test case B0218+357 is dominated by two bright images but the information needed to constrain the unknown parameters is provided only by the relatively smooth and weak Einstein ring. The new variant of LENSCLEAN is able to fit lens <span class="hlt">models</span> even in this difficult case. In order to allow the use of general mass <span class="hlt">models</span> with LENSCLEAN, we develop the new method LENTIL which inverts the lens equation much more reliably than any other method. This high reliability is essential for the use as part of LENSCLEAN. Finally a new method is developed to produce source plane maps of the unlensed source from the best LENSCLEAN brightness <span class="hlt">models</span>. This method is based on the new concept of `dirty beams' in the source plane. The application to the lens B0218+357 leads to the first useful constraints for the lens position and thus to a result for the Hubble constant. These results are presented in the accompanying Paper II, together with a discussion of classical lens <span class="hlt">modelling</span> for this system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=leadership+AND+sociology&pg=5&id=EJ583758','ERIC'); return false;" href="http://eric.ed.gov/?q=leadership+AND+sociology&pg=5&id=EJ583758"><span id="translatedtitle">Leadership Giftedness: <span class="hlt">Models</span> <span class="hlt">Revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Roach, Adelma A.; Wyman, Leisy T.; Brookes, Heather; Chavez, Christina; Heath, Shirley Brice; Valdes, Guadalupe</p> <p>1999-01-01</p> <p>A decade-long study in underserved and at-risk communities evaluated young people identified as leaders within out-of-school youth organizations. Findings revealed that emerging youth leadership differs from established measures and leadership theories drawn from adults with a greater emphasis on how leadership happens, rather than who leaders…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=bernoulli&pg=2&id=EJ913086','ERIC'); return false;" href="http://eric.ed.gov/?q=bernoulli&pg=2&id=EJ913086"><span id="translatedtitle">Siphons, <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Richert, Alex; Binder, P. -M.</p> <p>2011-01-01</p> <p>The siphon is a very useful example of early technology, the operation of which has long been well understood. A recent article makes the claim that established beliefs regarding this device are incorrect and proposes a "chain <span class="hlt">model</span>" in which intermolecular forces within the fluid play a large role while atmospheric pressure does not. We have</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li class="active"><span>9</span></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_9 --> <div id="page_10" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li class="active"><span>10</span></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="181"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=atmospheric+AND+pressure&pg=2&id=EJ913086','ERIC'); return false;" href="http://eric.ed.gov/?q=atmospheric+AND+pressure&pg=2&id=EJ913086"><span id="translatedtitle">Siphons, <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Richert, Alex; Binder, P. -M.</p> <p>2011-01-01</p> <p>The siphon is a very useful example of early technology, the operation of which has long been well understood. A recent article makes the claim that established beliefs regarding this device are incorrect and proposes a "chain <span class="hlt">model</span>" in which intermolecular forces within the fluid play a large role while atmospheric pressure does not. We have…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015WRR....51.3145Y','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015WRR....51.3145Y"><span id="translatedtitle">Comparison of three dual-source remote sensing evapotranspiration <span class="hlt">models</span> during the MUSOEXE-12 campaign: <span class="hlt">Revisit</span> of <span class="hlt">model</span> physics</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Yang, Yuting; Long, Di; Guan, Huade; Liang, Wei; Simmons, Craig; Batelaan, Okke</p> <p>2015-05-01</p> <p>Various remote sensing-based terrestrial evapotranspiration (ET) <span class="hlt">models</span> have been developed during the past four decades. These <span class="hlt">models</span> vary in conceptual and mathematical representations of the physics, consequently leading to different performances. Examination of uncertainties associated with limitations in <span class="hlt">model</span> physics will be useful for <span class="hlt">model</span> selection and improvement. Here, three dual-source remote sensing ET <span class="hlt">models</span> (i.e., the Hybrid dual-source scheme and Trapezoid framework-based ET <span class="hlt">Model</span> (HTEM), the Two-Source Energy Balance (TSEB) <span class="hlt">model</span>, and the MOD16 ET algorithm) using ASTER images were compared during the MUSOEXE-12 campaign in the Heihe River Basin in Northwest China, aiming to better understand the differences in <span class="hlt">model</span> physics that potentially lead to differences in <span class="hlt">model</span> performance. <span class="hlt">Model</span> results were first compared against observations from a dense network of eddy covariance towers and isotope-based evaporation (E) and transpiration (T) partitioning. Results show that HTEM outperformed the other two <span class="hlt">models</span> in simulating ET and its partitioning, whereas MOD16 performed worst (i.e., ET root-mean-square errors are 42.3 W/m2 (HTEM), 49.8 W/m2 (TSEB), and 95.3 W/m2 (MOD16)). On to <span class="hlt">model</span> limitations, HTEM tends to underestimate ET under high advection due mostly to the underestimation of temperatures for the wet edge in its trapezoidal space. For TSEB, large uncertainties occur in determining the initial Priestley-Taylor coefficient and the iteration procedure for ET partitioning, leading to overestimation/underestimation of T/E in most cases, particularly over sparse vegetation. Primary use of meteorological data for MOD16 does not effectively capture the soil moisture restriction on ET, and therefore results in unreasonable spatial ET patterns.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/943975','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/943975"><span id="translatedtitle">Searle's"Dualism <span class="hlt">Revisited</span>"</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>P., Henry</p> <p>2008-11-20</p> <p>A recent article in which John Searle claims to refute dualism is examined from a scientific perspective. John Searle begins his recent article 'Dualism <span class="hlt">Revisited</span>' by stating his belief that the philosophical problem of consciousness has a scientific solution. He then claims to refute dualism. It is therefore appropriate to examine his arguments against dualism from a scientific perspective. Scientific physical theories contain two kinds of descriptions: (1) Descriptions of our empirical findings, expressed in an every-day language that allows us communicate to each other our sensory experiences pertaining to what we have done and what we have learned; and (2) Descriptions of a theoretical <span class="hlt">model</span>, expressed in a mathematical language that allows us to communicate to each other certain ideas that exist in our mathematical imaginations, and that are believed to represent, within our streams of consciousness, certain aspects of reality that we deem to exist independently of their being perceived by any human observer. These two parts of our scientific description correspond to the two aspects of our general contemporary dualistic understanding of the total reality in which we are imbedded, namely the empirical-mental aspect and the theoretical-physical aspect. The duality question is whether this general dualistic understanding of ourselves should be regarded as false in some important philosophical or scientific sense.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015SPIE.9475E..0HH','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015SPIE.9475E..0HH"><span id="translatedtitle">Multinomial pattern matching <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Horvath, Matthew S.; Rigling, Brian D.</p> <p>2015-05-01</p> <p>Multinomial pattern matching (MPM) is an automatic target recognition algorithm developed for specifically radar data at Sandia National Laboratories. The algorithm is in a family of algorithms that first quantizes pixel value into Nq bins based on pixel amplitude before training and classification. This quantization step reduces the sensitivity of algorithm performance to absolute intensity variation in the data, typical of radar data where signatures exhibit high variation for even small changes in aspect angle. Our previous work has focused on performance analysis of peaky template matching, a special case of MPM where binary quantization is used (Nq = 2). Unfortunately references on these algorithms are generally difficult to locate and here we <span class="hlt">revisit</span> the MPM algorithm and illustrate the underlying statistical <span class="hlt">model</span> and decision rules for two algorithm interpretations: the 1-of-K vector form and the scalar. MPM can also be used as a detector and specific attention is given to algorithm tuning where "peak pixels" are chosen based on their underlying empirical probabilities according to a reward minimization strategy aimed at reducing false alarms in the detection scenario and false positives in a classification capacity. The algorithms are demonstrated using Monte Carlo simulations on the AFRL civilian vehicle dataset for variety of choices of Nq.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3924568','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3924568"><span id="translatedtitle"><span class="hlt">Revisiting</span> Mednick’s <span class="hlt">Model</span> on Creativity-Related Differences in Associative Hierarchies. Evidence for a Common Path to Uncommon Thought</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Benedek, Mathias; Neubauer, Aljoscha C</p> <p>2013-01-01</p> <p>Fifty years ago, Mednick [Psychological Review, 69 (1962) 220] proposed an elaborate <span class="hlt">model</span> that aimed to explain how creative ideas are generated and why creative people are more likely to have creative ideas. The <span class="hlt">model</span> assumes that creative people have flatter associative hierarchies and as a consequence can more fluently retrieve remote associative elements, which can be combined to form creative ideas. This study aimed at <span class="hlt">revisiting</span> Mednick’s <span class="hlt">model</span> and providing an extensive test of its hypotheses. A continuous free association task was employed and association performance was compared between groups high and low in creativity, as defined by divergent thinking ability and self-report measures. We found that associative hierarchies do not differ between low and high creative people, but creative people showed higher associative fluency and more uncommon responses. This suggests that creativity may not be related to a special organization of associative memory, but rather to a more effective way of accessing its contents. The findings add to the evidence associating creativity with highly adaptive executive functioning. PMID:24532853</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012BoLMe.144..199S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012BoLMe.144..199S"><span id="translatedtitle">The Apsley and Castro Limited-Length-Scale {{k-\\varepsilon}} <span class="hlt">Model</span> <span class="hlt">Revisited</span> for Improved Performance in the Atmospheric Surface Layer</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sumner, Jonathon; Masson, Christian</p> <p>2012-08-01</p> <p>The limited-length-scale {k-\\varepsilon} <span class="hlt">model</span> proposed by Apsley and Castro for the atmospheric boundary layer (Boundary-Layer Meteorol 83(1):75-98, 1997) is <span class="hlt">revisited</span> with special attention given to its predictions in the constant-stress surface layer. The original <span class="hlt">model</span> proposes a modification to the length-scale-governing {\\varepsilon} equation that ensures consistency with surface-layer scaling in the limit of small ℓ m/ ℓ max (where ℓ m is the mixing length and ℓ max its maximum) and yet imposes a limit on ℓ m as ℓ m/ ℓ max approaches one. However, within the equilibrium surface layer and for moderate values of z/ ℓ max, the predicted profiles of velocity, mixing length, and dissipation rate using the Apsley and Castro <span class="hlt">model</span> do not coincide with analytical solutions. In view of this, a general {\\varepsilon} transport equation is derived herein in terms of an arbitrary desired mixing-length expression that ensures exact agreement with corresponding analytical solutions for both neutral and stable stability. From this result, a new expression for {C_{\\varepsilon3}} can be inferred that shows this coefficient tends to a constant only for limiting values of z/ L; and, furthermore, that the values of {C_{\\varepsilon3}} for z/ L → 0 and z/ L →∞ differ by a factor of exactly two.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012AGUFM.A54G..04G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012AGUFM.A54G..04G"><span id="translatedtitle"><span class="hlt">Revisiting</span> the isotopes of CO in the troposphere: Comprehensive <span class="hlt">modeling</span> with the EMAC <span class="hlt">model</span> and UTLS observations from the CARIBIC platform</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Gromov, S. S.; Joeckel, P.; Brenninkmeijer, C. A.</p> <p>2012-12-01</p> <p>We present the results of global <span class="hlt">modeling</span> of the stable carbon isotope composition of atmospheric tracers, with a focus on the isotopic composition of CO and its sensitivity to key atmospheric processes. We <span class="hlt">revisit</span> the results of earlier simplified bottom-up <span class="hlt">model</span> approaches consistently lacking tropospheric 13CO compared to observed isotope ratios. In this study we employ a more elaborate <span class="hlt">modeling</span> framework including the comprehensive isotopic chemistry mechanism in the ECHAM/MESSy Atmospheric Chemistry (EMAC) general circulation <span class="hlt">model</span>. The Modular Earth Submodel System (MESSy) framework incorporated in EMAC allows an explicit, more realistic treatment of the isotope effects (e.g., fractionation due to chemistry, diffusion, dry deposition) on a per species basis. In addition, our review of the isotope-inclusive emissions of CO and its precursors suggests more 13C-enriched surface sources compared to previous estimates. We further revise the parameterization of the kinetic isotope effect (KIE) in the reaction of CO with OH, the principal atmospheric sink of CO crucially influencing its airborne isotope composition. In contrast to the conventional (pressure-only dependent) assumption, the new complex rate coefficient parameterization for CO+OH suggests a slight (~0.5‰ per 10K) inverse temperature dependence of the 13C KIE, owing to the change in partitioning between the different reaction exit channels. Our results with EMAC do not support the inferences of the studies suggesting lower input of highly 13C-depleted carbon from methane to CO. In particular, we estimate high (0.94) average yield of CO per reacted CH4 molecule in the troposphere, which is a diagnosed variable in EMAC, rather than an assumed parameter. It is also shown that due to the preferential removal of the lighter isotopologues of the CH4→CO chain intermediates (e.g. formaldehyde and methanol), the photochemically produced CO becomes supplementary enriched in 13C; nonetheless, this effect for CO is small. We find that inaccurate surface emission estimates are responsible for roughly half of the 13CO discrepancy between our <span class="hlt">model</span> and observations in the northern hemisphere. Scrutinizing the remote southern hemisphere CO compositions suggests that the most credible explanation for the large underestimation of tropospheric 13CO (not conflicting with the high CH4→CO yield) is the missing larger fractionation during the CO+OH sink at lower temperatures. The comparison of simulated CO compositions with UTLS observations available from the CARIBIC-1 project also supports this conclusion. Overall, the introduced refinements (i.e., the improved emissions and new KIE parameterization) account for an additional overall tropospheric enrichment of 2-3‰ in 13CO content that outbalances excessive 13CO depletion caused by the CH4 contribution. Finally, a detailed analysis of the CARIBIC-1 CO isotope data is conducted. We discuss the application of these unique observations to better constraining the 13C and 18O isotope signatures of the surface and photochemical sources of tropospheric CO.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=glass&pg=3&id=EJ985093','ERIC'); return false;" href="http://eric.ed.gov/?q=glass&pg=3&id=EJ985093"><span id="translatedtitle">A Hydrostatic Paradox <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Ganci, Salvatore</p> <p>2012-01-01</p> <p>This paper <span class="hlt">revisits</span> a well-known hydrostatic paradox, observed when turning upside down a glass partially filled with water and covered with a sheet of light material. The phenomenon is studied in its most general form by including the mass of the cover. A historical survey of this experiment shows that a common misunderstanding of the phenomenon…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=BATS&pg=3&id=EJ858639','ERIC'); return false;" href="http://eric.ed.gov/?q=BATS&pg=3&id=EJ858639"><span id="translatedtitle">Colloquial Hebrew Imperatives <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bolozky, Shmuel</p> <p>2009-01-01</p> <p>In <span class="hlt">revisiting</span> Bolozky's [Bolozky, Shmuel, 1979. "On the new imperative in colloquial Hebrew." "Hebrew Annual Review" 3, 17-24] and Bat-El's [Bat-El, Outi, 2002. "True truncation in colloquial Hebrew imperatives." "Language" 78(4), 651-683] analyses of colloquial Hebrew imperatives, the article argues for restricting Imperative Truncation to the</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=judith+AND+butler&pg=3&id=EJ987054','ERIC'); return false;" href="http://eric.ed.gov/?q=judith+AND+butler&pg=3&id=EJ987054"><span id="translatedtitle">The Linguistic Repertoire <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Busch, Brigitta</p> <p>2012-01-01</p> <p>This article argues for the relevance of poststructuralist approaches to the notion of a linguistic repertoire and introduces the notion of language portraits as a basis for empirical study of the way in which speakers conceive and represent their heteroglossic repertoires. The first part of the article <span class="hlt">revisits</span> Gumperz's notion of a linguistic…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Calculus+AND+Teaching+AND+research&pg=7&id=EJ791945','ERIC'); return false;" href="http://eric.ed.gov/?q=Calculus+AND+Teaching+AND+research&pg=7&id=EJ791945"><span id="translatedtitle">Concept Image <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bingolbali, Erhan; Monaghan, John</p> <p>2008-01-01</p> <p>Concept image and concept definition is an important construct in mathematics education. Its use, however, has been limited to cognitive studies. This article <span class="hlt">revisits</span> concept image in the context of research on undergraduate students' understanding of the derivative which regards the context of learning as paramount. The literature, mainly on…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=peretz&id=EJ949252','ERIC'); return false;" href="http://eric.ed.gov/?q=peretz&id=EJ949252"><span id="translatedtitle"><span class="hlt">Revisiting</span> Curriculum Potential</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Deng, Zongyi</p> <p>2011-01-01</p> <p>This article analyzes the notion of curriculum potential by <span class="hlt">revisiting</span> the ideas of Miriam Ben-Peretz and Joseph Schwab. Invoking the German "Didaktik" tradition and by way of a curriculum-making framework, the paper argues that interpreting curriculum materials for curriculum potential requires a careful analysis and unpacking of the meanings and…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=198247&keyword=biomagnification&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50&CFID=72248350&CFTOKEN=52402339','EPA-EIMS'); return false;" href="http://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=198247&keyword=biomagnification&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50&CFID=72248350&CFTOKEN=52402339"><span id="translatedtitle"><span class="hlt">Revisiting</span> Bioaccumulation Criteria</span></a></p> <p><a target="_blank" href="http://oaspub.epa.gov/eims/query.page">EPA Science Inventory</a></p> <p></p> <p></p> <p>The objective of workgroup 5 was to <span class="hlt">revisit</span> the B(ioaccumulation) criteria that are currently being used to identify POPs under the Stockholm Convention and PBTs under CEPA, TSCA, REACh and other programs. Despite the lack of a recognized definition for a B substance, we defined ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=scientific+AND+work&pg=3&id=EJ1011398','ERIC'); return false;" href="http://eric.ed.gov/?q=scientific+AND+work&pg=3&id=EJ1011398"><span id="translatedtitle">Anodic Polarization Curves <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Liu, Yue; Drew, Michael G. B.; Liu, Ying; Liu, Lin</p> <p>2013-01-01</p> <p>An experiment published in this "Journal" has been <span class="hlt">revisited</span> and it is found that the curve pattern of the anodic polarization curve for iron repeats itself successively when the potential scan is repeated. It is surprising that this observation has not been reported previously in the literature because it immediately brings into…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=courage&pg=4&id=EJ809502','ERIC'); return false;" href="http://eric.ed.gov/?q=courage&pg=4&id=EJ809502"><span id="translatedtitle"><span class="hlt">Revisiting</span> Teachers as Learners</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Thomson, Liz</p> <p>2008-01-01</p> <p>This article <span class="hlt">revisits</span> the concept of teachers as learners within the context of radical changes that have taken place within the education system in England over the past 25 years. The concept of "professional courage" is discussed and examined in relation to questions and issues raised by Paulo Freire in a series of letters to teachers (1997).…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=bats&pg=3&id=EJ858639','ERIC'); return false;" href="http://eric.ed.gov/?q=bats&pg=3&id=EJ858639"><span id="translatedtitle">Colloquial Hebrew Imperatives <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bolozky, Shmuel</p> <p>2009-01-01</p> <p>In <span class="hlt">revisiting</span> Bolozky's [Bolozky, Shmuel, 1979. "On the new imperative in colloquial Hebrew." "Hebrew Annual Review" 3, 17-24] and Bat-El's [Bat-El, Outi, 2002. "True truncation in colloquial Hebrew imperatives." "Language" 78(4), 651-683] analyses of colloquial Hebrew imperatives, the article argues for restricting Imperative Truncation to the…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013P%26SS...87...85K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013P%26SS...87...85K"><span id="translatedtitle"><span class="hlt">Revisiting</span> cometary bow shock positions</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Koenders, C.; Glassmeier, K.-H.; Richter, I.; Motschmann, U.; Rubin, M.</p> <p>2013-10-01</p> <p>The Rosetta spacecraft will arrive at comet 67P/Churyumov-Gerasimenko in 2014 and will escort the comet along its journey around the Sun. The predicted outgassing rate of the comet and the solar wind properties close to its perihelion at 1.24 AU lead to the expectation that a cometary bow shock will form during the escort phase. Since the forecasts of the subsolar stand off distances differ, this study <span class="hlt">revisits</span> selected <span class="hlt">models</span> and presents hybrid simulations of the comet-solar wind interaction region performed with the A.I.K.E.F. code. It is shown that small variations of the solar wind parameters will shift the bow shock position considerably. In addition, a <span class="hlt">model</span> is presented that reproduces the bow shock distances observed in the hybrid simulations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013EPSC....8..425K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013EPSC....8..425K"><span id="translatedtitle"><span class="hlt">Revisiting</span> Cometary Bow Shock Positions</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Koenders, C.; Glassmeier, K.-H.; Richter, I.; Motschmann, U.; Rubin, M.</p> <p>2013-09-01</p> <p>The Rosetta spacecraft will arrive at comet 67P/Churyumov-Gerasimenko in 2014 and will escort the comet along its journey around the Sun. The predicted outgassing rate of the comet and the solar wind properties next to its perihelion at 1.24 AU lead to the expectation that a cometary bow shock will form during the escort phase. Since the forecasts of the subsolar stand off distances differ, this study <span class="hlt">revisits</span> selected <span class="hlt">models</span> and presents hybrid simulations of the comet-solar wind interaction region performed with the A.I.K.E.F. code. In addition, an analytical <span class="hlt">model</span> is presented that reproduces the bow shock distances observed in the hybrid simulations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/18300683','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/18300683"><span id="translatedtitle">Orthopaedic service lines-<span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Patterson, Cheryl</p> <p>2008-01-01</p> <p>This article <span class="hlt">revisits</span> the application of orthopaedic service lines from early introduction and growth of this organizational approach in the 1980s, through the 1990s, and into the current decade. The author has experienced and worked in various service-line structures through these three decades, as well as the preservice-line era of 1970s orthopaedics. Past lessons learned during earlier phases and then current trends and analysis by industry experts are summarized briefly, with indication given of the future for service lines. Variation versus consistency of certain elements in service-line definitions and in operational <span class="hlt">models</span> is discussed. Main components of service-line structures and typical processes are described briefly, along with a more detailed section on the service-line director/manager role. Current knowledge contained here will help guide the reader to more "out-of-the-box" thinking toward comprehensive orthopaedic centers of excellence. PMID:18300683</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Luke&pg=2&id=EJ983492','ERIC'); return false;" href="http://eric.ed.gov/?q=Luke&pg=2&id=EJ983492"><span id="translatedtitle"><span class="hlt">Revisiting</span> Dialogues and Monologues</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Kvernbekk, Tone</p> <p>2012-01-01</p> <p>In educational discourse dialogue tends to be viewed as being (morally) superior to monologue. When we look at them as basic forms of communication, we find that dialogue is a two-way, one-to-one form and monologue is a one-way, one-to-many form. In this paper I <span class="hlt">revisit</span> the alleged (moral) superiority of dialogue. First, I problematize certain…</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li class="active"><span>10</span></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_10 --> <div id="page_11" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li class="active"><span>11</span></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="201"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=32193','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=32193"><span id="translatedtitle">Clinical ethics <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Singer, Peter A; Pellegrino, Edmund D; Siegler, Mark</p> <p>2001-01-01</p> <p>A decade ago, we reviewed the field of clinical ethics; assessed its progress in research, education, and ethics committees and consultation; and made predictions about the future of the field. In this article, we <span class="hlt">revisit</span> clinical ethics to examine our earlier observations, highlight key developments, and discuss remaining challenges for clinical ethics, including the need to develop a global perspective on clinical ethics problems. PMID:11346456</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015EGUGA..17.8274M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015EGUGA..17.8274M"><span id="translatedtitle">Dynamic Topography <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Moresi, Louis</p> <p>2015-04-01</p> <p>Dynamic Topography <span class="hlt">Revisited</span> Dynamic topography is usually considered to be one of the trinity of contributing causes to the Earth's non-hydrostatic topography along with the long-term elastic strength of the lithosphere and isostatic responses to density anomalies within the lithosphere. Dynamic topography, thought of this way, is what is left over when other sources of support have been eliminated. An alternate and explicit definition of dynamic topography is that deflection of the surface which is attributable to creeping viscous flow. The problem with the first definition of dynamic topography is 1) that the lithosphere is almost certainly a visco-elastic / brittle layer with no absolute boundary between flowing and static regions, and 2) the lithosphere is, a thermal / compositional boundary layer in which some buoyancy is attributable to immutable, intrinsic density variations and some is due to thermal anomalies which are coupled to the flow. In each case, it is difficult to draw a sharp line between each contribution to the overall topography. The second definition of dynamic topography does seem cleaner / more precise but it suffers from the problem that it is not measurable in practice. On the other hand, this approach has resulted in a rich literature concerning the analysis of large scale geoid and topography and the relation to buoyancy and mechanical properties of the Earth [e.g. refs 1,2,3] In convection <span class="hlt">models</span> with viscous, elastic, brittle rheology and compositional buoyancy, however, it is possible to examine how the surface topography (and geoid) are supported and how different ways of interpreting the "observable" fields introduce different biases. This is what we will do. References (a.k.a. homework) [1] Hager, B. H., R. W. Clayton, M. A. Richards, R. P. Comer, and A. M. Dziewonski (1985), Lower mantle heterogeneity, dynamic topography and the geoid, Nature, 313(6003), 541-545, doi:10.1038/313541a0. [2] Parsons, B., and S. Daly (1983), The relationship between surface topography, gravity anomalies, and temperature structure of convection, Journal of Geophysical Research: Solid Earth (1978-2012), 88(B2), 1129-1144, doi:10.1029/JB088iB02p01129. [3] Robinson, E. M., B. Parsons, and S. F. Daly (1987), The effect of a shallow low viscosity zone on the apparent compensation of mid-plate swells, Earth and Planetary Science Letters, 82(3-4), 335-348, doi:10.1016/0012-821X(87)90207-X.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013AGUFM.P53B1855C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013AGUFM.P53B1855C"><span id="translatedtitle">Radiolytic Cryovolcanism <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Cooper, J. F.; Cooper, P. D.; Sittler, E. C.; Wesenberg, R. P.</p> <p>2013-12-01</p> <p>Active geysers of water vapor and ice grains from the south pole of Enceladus are not yet definitively explained in terms of energy sources and processes. Other instances of hot (Io) and cold (Mars, Triton) volcanism beyond Earth are known if not fully understood. We <span class="hlt">revisit</span>, in comparison to other <span class="hlt">models</span>, the 'Old Faithful' theory of radiolytic gas-driven cryovolcanism first proposed by Cooper et al. [Plan. Sp. Sci. 2009]. In the energetic electron irradiation environment of Enceladus within Saturn's magnetosphere, a 10-percent duty cycle could be maintained for current geyser activity driven by gases from oxidation of ammonia to N2 and methane to CO2 in the thermal margins of a south polar sea. Much shorter duty cycles down to 0.01 percent would be required to account for thermal power output up to 16 GW, Steady accumulation of oxidant energy over four billion years could have powered all Enceladus emissions over the past four hundred thousand to four hundred million years. There could be separate energy sources driving mass flow and thermal emission over vastly different time scales. Since episodic tidal dissipation on 10 Myr time scales at 0.1 - 1 Gyr intervals [O'Neill and Nimmo, Nature 2010], and thus duty cycles 1 - 10 percent, could heat the polar sea to the current level, the radiolytic energy source could easily power and modulate the geyser mass flow on million-year time scales. Maximum thermal emission temperature 223 K [Abramov and Spencer, Icarus 2009] hints at thermal buffering in the basal and vent wall layers by a 1:1 H2O:H2O2 radiolytic eutectic, assuming deep ice crust saturation with H2O2 from long cumulative surface irradiation and downward ice convection. Due to density stratification the peroxide eutectic and salt water layers could separate, so that the denser peroxide layer (1.2 g/cc) descends to the polar sea while the lighter salt water (1.05 g/cc) rises along separate channels. Methane reservoirs could be found dissolved into the polar sea, or else trapped in hydrates [Kieffer et al., Science 2006] along flow paths and at the walls of the polar sea at surface depths below 20 km [Fortes, Icarus 2007]. Driver gas production for cryovolcanism could occur wherever these two layers come into contact under requisite temperature and pressure conditions, e.g. from 220 K and 10 bar at the 10-km basal layer of the overlying ice crust to 647 K and 220 bars at the liquid water limit, above the core-mantle boundary at 460 bars [Fortes, Icarus 2007]. We expect H2O2 oxidation to ignite at high temperatures but metallic minerals could catalyze reactions at lower temperatures nearer the basal layer. Pressure effects on oxidation rates are uncertain. Definitive <span class="hlt">modeling</span> of Enceladus cryovolcanism likely involves synthesis of key processes from multiple <span class="hlt">models</span>: Cold Faithful [Porco et al., Science 2006], Frigid Faithful [Keiffer et al., Science 2006], Frothy Faithful [Fortes, Icarus 2007], Old Faithful, and 'Perrier Ocean' recirculation [Matson et al., Icarus 2012].</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/20050182780','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/20050182780"><span id="translatedtitle">Temporal Dynamic Controllability <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Morris, Paul H.; Muscettola, Nicola</p> <p>2005-01-01</p> <p>An important issue for temporal planners is the ability to handle temporal uncertainty. We <span class="hlt">revisit</span> the question of how to determine whether a given set of temporal requirements are feasible in the light of uncertain durations of some processes. In particular, we consider how best to determine whether a network is Dynamically Controllable, i.e., whether a dynamic strategy exists for executing the network that is guaranteed to satisfy the requirements. Previous work has shown the existence of a pseudo-polynomial algorithm for testing Dynamic Controllability. Here, we greatly simplify the previous framework, and present a true polynomial algorithm with a cutoff based only on the number of nodes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006PhFl...18g3101L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006PhFl...18g3101L"><span id="translatedtitle">Multicomponent diffusion <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Lam, S. H.</p> <p>2006-07-01</p> <p>The derivation of the multicomponent diffusion law is <span class="hlt">revisited</span>. Following Furry [Am. J. Phys. 16, 63 (1948)], Williams [Am. J. Phys. 26, 467 (1958); Combustion Theory, 2nd ed. (Benjamin/Cummings , Menlo Park, CA,1985)] heuristically rederived the classical kinetic theory results using macroscopic equations, and pointed out that the dynamics of the mixture fluid had been assumed inviscid. This paper generalizes the derivation, shows that the inviscid assumption can easily be relaxed to add a new term to the classical diffusion law, and the thermal diffusion term can also be easily recovered. The nonuniqueness of the multicomponent diffusion coefficient matrix is emphasized and discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4807457','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4807457"><span id="translatedtitle">Hodgkin–Huxley <span class="hlt">revisited</span>: reparametrization and identifiability analysis of the classic action potential <span class="hlt">model</span> with approximate Bayesian methods</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Daly, Aidan C.; Holmes, Chris</p> <p>2015-01-01</p> <p>As cardiac cell <span class="hlt">models</span> become increasingly complex, a correspondingly complex ‘genealogy’ of inherited parameter values has also emerged. The result has been the loss of a direct link between <span class="hlt">model</span> parameters and experimental data, limiting both reproducibility and the ability to re-fit to new data. We examine the ability of approximate Bayesian computation (ABC) to infer parameter distributions in the seminal action potential <span class="hlt">model</span> of Hodgkin and Huxley, for which an immediate and documented connection to experimental results exists. The ability of ABC to produce tight posteriors around the reported values for the gating rates of sodium and potassium ion channels validates the precision of this early work, while the highly variable posteriors around certain voltage dependency parameters suggests that voltage clamp experiments alone are insufficient to constrain the full <span class="hlt">model</span>. Despite this, Hodgkin and Huxley's estimates are shown to be competitive with those produced by ABC, and the variable behaviour of posterior parametrized <span class="hlt">models</span> under complex voltage protocols suggests that with additional data the <span class="hlt">model</span> could be fully constrained. This work will provide the starting point for a full identifiability analysis of commonly used cardiac <span class="hlt">models</span>, as well as a template for informative, data-driven parametrization of newly proposed <span class="hlt">models</span>. PMID:27019736</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=preprofessional+AND+practices&pg=4&id=ED410202','ERIC'); return false;" href="http://eric.ed.gov/?q=preprofessional+AND+practices&pg=4&id=ED410202"><span id="translatedtitle">Dewey <span class="hlt">Revisited</span>: A Pragmatic-Experiential <span class="hlt">Model</span> for Teacher Education. A Thematic Topic for "The Educational Forum."</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Wilson, Jan; Baird, Debra</p> <p></p> <p>This paper shares the development and evolution of a pragmatic-experiential <span class="hlt">model</span> of teacher education at the University of West Alabama. The <span class="hlt">model</span> is grounded in the theories and philosophies promoted by Dewey and James. The philosophy of pragmatism encourages testing the authenticity or truth of ideas through experience. Experientialism, an</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010EGUGA..12.7433F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010EGUGA..12.7433F"><span id="translatedtitle">"The right answer for the wrong reason" <span class="hlt">revisited</span>: validation of a spatially-explicit soil erosion <span class="hlt">model</span> (RillGrow)</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Favis-Mortlock, David</p> <p>2010-05-01</p> <p>One finding from the GCTE evaluation of soil erosion <span class="hlt">models</span> (Jetten et al., 1999) is that the <span class="hlt">models</span> tested were, in general, weak regarding the spatial aspects of erosion. A perfectly adequate simulation of runoff and soil loss at the catchment outlet could be produced even if the <span class="hlt">model</span> did a poor job of identifying the location of erosion hotspots within that catchment. Spatially, the <span class="hlt">models</span> could give "the right answer for the wrong reason". As well as casting doubt on the validity of process representations within such a <span class="hlt">model</span>, this kind of result is clearly unacceptable when using it to plan or evaluate soil conservation measures within the catchment. With this as a background, the RillGrow series of soil erosion <span class="hlt">models</span> were developed. These represent an eroding hillslope area as a self-organizing system (e.g. Favis-Mortlock, 1998; Favis-Mortlock et al., 2000). Microtopography is considered to determine the spatial pattern of overland flow and hence of surface lowering; such lowering modifies the path of subsequent flow. This simple iterative relationship generates rill networks emergently, i.e. as a collective whole-system response to many local interactions. The approach removes a requirement of many erosion <span class="hlt">models</span>: the need to pre-specify' rill characteristics even for an unrilled surface. However, computational constraints currently confine RillGrow to simulation of small, plot-sized, areas. Even on such small areas however, <span class="hlt">model</span> validation is not straightforward. In a series of validation studies, DEMs of the microtopography of real soil surfaces (from both laboratory flumes and hillslope plots) were used as inputs to the RillGrow <span class="hlt">model</span>. <span class="hlt">Model</span>-simulated rill networks were then compared with those which developed on the real soil surfaces. Other <span class="hlt">model</span> outputs (e.g. hydrographs and sedigraphs at the outlet; water depths and velocities at points on the surface) were similarly compared. While conceptually simple, problems with this approach include: * The difficulty of objectively comparing two rilled soil surfaces. Real and <span class="hlt">modelled</span> surfaces might appear very similar, but if planwise rill locations differ by even a few mm, then correlation-based measures indicate a poor result. The converse can also be true. * Flow velocity within rills can vary widely over short distances. However velocity values obtained using e.g. dye tracers have had this small-scale variation smoothed away. How should such values be compared with point-based simulated flow velocity values? Such ambiguities once again open the possibility of obtaining "the right answer for the wrong reason". Thus this paper highlights these and other issues which can arise when validating a spatially-explicit soil erosion <span class="hlt">model</span> such as RillGrow.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/15923917','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/15923917"><span id="translatedtitle">A practical method of predicting client <span class="hlt">revisit</span> intention in a hospital setting.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lee, Kyun Jick</p> <p>2005-01-01</p> <p>Data mining (DM) <span class="hlt">models</span> are an alternative to traditional statistical methods for examining whether higher customer satisfaction leads to higher <span class="hlt">revisit</span> intention. This study used a total of 906 outpatients' satisfaction data collected from a nationwide survey interviews conducted by professional interviewers on a face-to-face basis in South Korea, 1998. Analyses showed that the relationship between overall satisfaction with hospital services and outpatients' <span class="hlt">revisit</span> intention, along with word-of-mouth recommendation as intermediate variables, developed into a nonlinear relationship. The five strongest predictors of <span class="hlt">revisit</span> intention were overall satisfaction, intention to recommend to others, awareness of hospital promotion, satisfaction with physician's kindness, and satisfaction with treatment level. PMID:15923917</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ1079231.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ1079231.pdf"><span id="translatedtitle"><span class="hlt">Revisiting</span> Constructivist Teaching Methods in Ontario Colleges Preparing for Accreditation</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Schultz, Rachel A.</p> <p>2015-01-01</p> <p>At the time of writing, the first community colleges in Ontario were preparing for transition to an accreditation <span class="hlt">model</span> from an audit system. This paper <span class="hlt">revisits</span> constructivist literature, arguing that a more pragmatic definition of constructivism effectively blends positivist and interactionist philosophies to achieve both student centred…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009AGUFM.H13D0996Y','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009AGUFM.H13D0996Y"><span id="translatedtitle">A functional <span class="hlt">model</span> of watershed-scale annual water balance partitioning: L’vovich, Ponce and Shetty <span class="hlt">revisited</span> (Invited)</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Yaeger, M. A.; Harman, C. J.; Troch, P. A.; Sivapalan, M.</p> <p>2009-12-01</p> <p>Ponce and Shetty (1995), building on the results of the previous global empirical work of L’vovich (1979), developed a “functional” <span class="hlt">model</span> of watershed water balance at the annual time scale. This <span class="hlt">model</span> conceptualized the rainfall partitioning in terms of a two stage competition between alternative fluxes or flow pathways. At the surface level the competition between infiltration (wetting) and quickflow governs the partitioning of incoming precipitation. At the subsurface level the competition between vaporization (evapotranspiration) and baseflow governs the partitioning of the wetted amount (wetting). The <span class="hlt">model</span> equations consist of identical functional forms for both of these stages and are characterized by 2 parameters in each case. In the first case, quickflow occurs only when precipitation exceeds a minimum threshold, but beyond that it can increase unbounded with precipitation. On the other hand, wetting increases monotonically at first but gradually asymptotes to an upper threshold. The second stage partitioning is assumed to occur in similar fashion, resulting in a lower threshold of wetting that is required to generate baseflow, and an upper bound to the vaporization amount. The four parameters of the <span class="hlt">models</span> are simply the two minimum threshold values and the two upper bounds. In this study, systematic baseflow separation was done using 50 years of daily rainfall-runoff data from 431 MOPEX catchments located around the United States to estimate the four annual water balance components using annual precipitation: quickflow, wetting, baseflow and vaporization. The Ponce and Shetty functional <span class="hlt">model</span> was then fitted to these components, calibrating to determine the four <span class="hlt">model</span> parameters. Using these parameters, the <span class="hlt">model</span> was used to analytically derive both the mean and variance of the Horton Index, which is defined as the ratio of annual vaporization to annual wetting. The results showed excellent agreement with the observed mean Horton Index, but systematically under-predicted its variance, which so far has defied explanation. The threshold values showed interesting spatial patterns across the US that may be related to climate and topography. The usefulness of this <span class="hlt">model</span> is that it can be easily applied to any catchment with precipitation and flow data. The way forward may be to explore the mechanisms through which the functional forms of the Ponce and Shetty <span class="hlt">model</span> may have emerged as a manifestation of small scale process interactions. This will help provide physical meanings to the four <span class="hlt">model</span> parameters. This exploration is left for further work.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Bulimia&pg=2&id=EJ934459','ERIC'); return false;" href="http://eric.ed.gov/?q=Bulimia&pg=2&id=EJ934459"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Affect Regulation <span class="hlt">Model</span> of Binge Eating: A Meta-Analysis of Studies Using Ecological Momentary Assessment</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Haedt-Matt, Alissa A.; Keel, Pamela K.</p> <p>2011-01-01</p> <p>The affect regulation <span class="hlt">model</span> of binge eating, which posits that patients binge eat to reduce negative affect (NA), has received support from cross-sectional and laboratory-based studies. Ecological momentary assessment (EMA) involves momentary ratings and repeated assessments over time and is ideally suited to identify temporal antecedents and…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=importance+AND+personal+AND+values&pg=6&id=EJ923093','ERIC'); return false;" href="http://eric.ed.gov/?q=importance+AND+personal+AND+values&pg=6&id=EJ923093"><span id="translatedtitle">Can an Opportunity to Learn at Work Reduce Stress?: A <span class="hlt">Revisitation</span> of the Job Demand-Control <span class="hlt">Model</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Panari, Chiara; Guglielmi, Dina; Simbula, Silvia; Depolo, Marco</p> <p>2010-01-01</p> <p>Purpose: This paper aims to extend the stress-buffering hypothesis of the demand-control <span class="hlt">model</span>. In addition to the control variable, it seeks to analyse the role of an opportunity for learning and development (L&D) in the workplace as a moderator variable between increased demands and need for recovery. Design/methodology/approach: A questionnaire…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED097404.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED097404.pdf"><span id="translatedtitle">A Simultaneous Equations <span class="hlt">Model</span> of the Educational Process: The Coleman Data <span class="hlt">Revisited</span> with an Emphasis on Achievement.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Boardman, Anthony E.; And Others</p> <p></p> <p>This paper has two main purposes. First, it examines verbal, nonverbal, reading, mathematical, and general informational achievement. Second, it estimates the achievement equations of a simultaneous equations <span class="hlt">model</span> of the educational process. The report, "Equality of Educational Opportunity," (EEOR) acted as a watershed for research into</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=management+AND+organisation&pg=3&id=EJ923093','ERIC'); return false;" href="http://eric.ed.gov/?q=management+AND+organisation&pg=3&id=EJ923093"><span id="translatedtitle">Can an Opportunity to Learn at Work Reduce Stress?: A <span class="hlt">Revisitation</span> of the Job Demand-Control <span class="hlt">Model</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Panari, Chiara; Guglielmi, Dina; Simbula, Silvia; Depolo, Marco</p> <p>2010-01-01</p> <p>Purpose: This paper aims to extend the stress-buffering hypothesis of the demand-control <span class="hlt">model</span>. In addition to the control variable, it seeks to analyse the role of an opportunity for learning and development (L&D) in the workplace as a moderator variable between increased demands and need for recovery. Design/methodology/approach: A questionnaire</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=facebook+OR+eating+AND+disorder&pg=4&id=EJ934459','ERIC'); return false;" href="http://eric.ed.gov/?q=facebook+OR+eating+AND+disorder&pg=4&id=EJ934459"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Affect Regulation <span class="hlt">Model</span> of Binge Eating: A Meta-Analysis of Studies Using Ecological Momentary Assessment</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Haedt-Matt, Alissa A.; Keel, Pamela K.</p> <p>2011-01-01</p> <p>The affect regulation <span class="hlt">model</span> of binge eating, which posits that patients binge eat to reduce negative affect (NA), has received support from cross-sectional and laboratory-based studies. Ecological momentary assessment (EMA) involves momentary ratings and repeated assessments over time and is ideally suited to identify temporal antecedents and</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/12268090','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/12268090"><span id="translatedtitle">John Turner <span class="hlt">revisited</span>: an intra-urban migration <span class="hlt">model</span> for colonial-type cities in Latin America.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Schuurman, F J</p> <p>1986-01-01</p> <p>The author uses the intra-urban migration <span class="hlt">model</span> developed by John Turner in the early 1960s to examine population movements in the city of Arequipa, Peru. Ways in which the <span class="hlt">model</span> applies in the case of Arequipa are summarized, as are quantitative and qualitative differences between the <span class="hlt">model</span> and the Arequipa study. The Turner <span class="hlt">model</span> employs economic (industrialization level), demographic (level of rural-to-urban migration), and political (housing policy) criteria to distinguish a city's transitional phase. "According to these criteria Arequipa clearly belongs to the mid-transitional phase. The pattern of intra-urban migration, however, shows a mixture of Turner's mid and late transitional phases (e.g. center acts still as a reception area, but at the same time a major number of migrants settle directly in the periphery).... The town itself has a limited industrial development and hardly any municipal housing policy worth mentioning.... It is above all the demographic factor in combination with the town's morphology (a large colonial-type center, etc.) which in the case of Arequipa regulates the pattern of intra-urban migration." PMID:12268090</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/21392312','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/21392312"><span id="translatedtitle">A <span class="hlt">REVISIT</span> OF THE TWO-POLE CAUSTIC <span class="hlt">MODEL</span> FOR GeV LIGHT CURVES OF GAMMA-RAY PULSARS</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Fang, J.; Zhang, L.</p> <p>2010-02-01</p> <p>The GeV light curve of a pulsar is an important probe to detect acceleration regions in its magnetosphere. Motivated by the recent reports on the observations of pulsars by the Fermi Large Area Telescope, we restudy the two-pole caustic <span class="hlt">model</span> and revise it to investigate the properties of the light curves in the GeV band. In the revised <span class="hlt">model</span>, although acceleration gaps can extend from the star surface to the light cylinder along near the last open field lines, the extension of the gaps along the azimuthal direction is limited because of photon-photon pair production process. In such gaps, high-energy photons are emitted uniformly and tangentially to the field lines but cannot be efficiently produced along these field lines where the distances to the null charge surface are larger than approx0.9 times the distance of the light cylinder, and the effective azimuth extension of the gaps is about 230 deg. The <span class="hlt">model</span> is applied to the four pulsars, Vela, PSR J1028-5819, PSR J0205+6449, and PSR J2021+3651, whose light curves obtained with Fermi have been recently released. The <span class="hlt">model</span> is successful in reproducing the general feature of the light curves for the four pulsars, and the radial distances of the radio pulse for the four pulsars are estimated.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JGS....17...61N','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JGS....17...61N"><span id="translatedtitle"><span class="hlt">Revisiting</span> the destination ranking procedure in development of an Intervening Opportunities <span class="hlt">Model</span> for public transit trip distribution</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Nazem, Mohsen; Trépanier, Martin; Morency, Catherine</p> <p>2015-01-01</p> <p>An Enhanced Intervening Opportunities <span class="hlt">Model</span> (EIOM) is developed for Public Transit (PT). This is a distribution supply dependent <span class="hlt">model</span>, with single constraints on trip production for work trips during morning peak hours (6:00 a.m.-9:00 a.m.) within the Island of Montreal, Canada. Different data sets, including the 2008 Origin-Destination (OD) survey of the Greater Montreal Area, the 2006 Census of Canada, GTFS network data, along with the geographical data of the study area, are used. EIOM is a nonlinear <span class="hlt">model</span> composed of socio-demographics, PT supply data and work location attributes. An enhanced destination ranking procedure is used to calculate the number of spatially cumulative opportunities, the basic variable of EIOM. For comparison, a Basic Intervening Opportunities <span class="hlt">Model</span> (BIOM) is developed by using the basic destination ranking procedure. The main difference between EIOM and BIOM is in the destination ranking procedure: EIOM considers the maximization of a utility function composed of PT Level Of Service and number of opportunities at the destination, along with the OD trip duration, whereas BIOM is based on a destination ranking derived only from OD trip durations. Analysis confirmed that EIOM is more accurate than BIOM. This study presents a new tool for PT analysts, planners and policy makers to study the potential changes in PT trip patterns due to changes in socio-demographic characteristics, PT supply, and other factors. Also it opens new opportunities for the development of more accurate PT demand <span class="hlt">models</span> with new emergent data such as smart card validations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/24384034','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/24384034"><span id="translatedtitle">Protein folding in vivo <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Choi, Seong Il; Kwon, Soonbin; Son, Ahyun; Jeong, Hotcherl; Kim, Kyun-Hwan; Seong, Baik L</p> <p>2013-12-01</p> <p>Protein folding in vivo is extremely intricate and challenging to examine or predict because the conformational changes, including folding, misfolding, and aggregation, are largely influenced by the cellular environment. Traditionally, cellular protein folding has been considered predominantly in the context of the Anfinsen postulate and molecular chaperones. However, accumulating evidence reveals that these <span class="hlt">models</span> have limitations. In this review we <span class="hlt">revisit</span> these <span class="hlt">models</span>, and discuss co-translational folding, binding partner-mediated folding, and RNA-mediated folding as alternative or supplementary folding helpers. In addition, we discuss the folding helper systems mediated by macromolecules (e.g., ribosomes, membranes, and prefolded domains in multidomain proteins) that are tightly linked to newly synthesized polypeptides during protein biogenesis. These cis-acting folding helper systems, conceptually different from the trans-acting molecular chaperones, could play a crucial role in protein folding in vivo. Importantly, there is increasing evidence that the surface charges and excluded volume of macromolecules are important factors for stabilizing their connected polypeptides against aggregation. This stabilizing mechanism suggests that macromolecules including RNAs and proteins, let alone molecular chaperones, have an intrinsic ability to exert chaperoning function on their connected polypeptides independent of the linkage type between them. As an effective way to overcome the adverse effect of macromolecular crowding on protein folding, here we suggest that nascent polypeptide chains utilize the crowded environment in favor of productive folding by interacting with macromolecules. PMID:24384034</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li class="active"><span>11</span></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_11 --> <div id="page_12" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li class="active"><span>12</span></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="221"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013JChPh.138b5101T','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013JChPh.138b5101T"><span id="translatedtitle">A coarse-grained <span class="hlt">model</span> for DNA-functionalized spherical colloids, <span class="hlt">revisited</span>: Effective pair potential from parallel replica simulations</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Theodorakis, Panagiotis E.; Dellago, Christoph; Kahl, Gerhard</p> <p>2013-01-01</p> <p>We discuss a coarse-grained <span class="hlt">model</span> recently proposed by Starr and Sciortino [J. Phys.: Condens. Matter 18, L347 (2006), 10.1088/0953-8984/18/26/L02] for spherical particles functionalized with short single DNA strands. The <span class="hlt">model</span> incorporates two key aspects of DNA hybridization, i.e., the specificity of binding between DNA bases and the strong directionality of hydrogen bonds. Here, we calculate the effective potential between two DNA-functionalized particles of equal size using a parallel replica protocol. We find that the transition from bonded to unbonded configurations takes place at considerably lower temperatures compared to those that were originally predicted using standard simulations in the canonical ensemble. We put particular focus on DNA-decorations of tetrahedral and octahedral symmetry, as they are promising candidates for the self-assembly into a single-component diamond structure. Increasing colloid size hinders hybridization of the DNA strands, in agreement with experimental findings.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015GeoRL..42.3038D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015GeoRL..42.3038D"><span id="translatedtitle"><span class="hlt">Revisiting</span> the hemispheric asymmetry in midlatitude ozone changes following the Mount Pinatubo eruption: A 3-D <span class="hlt">model</span> study</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Dhomse, S. S.; Chipperfield, M. P.; Feng, W.; Hossaini, R.; Mann, G. W.; Santee, M. L.</p> <p>2015-04-01</p> <p>Following the eruption of Mount Pinatubo, satellite and in situ measurements showed a large enhancement in stratospheric aerosol in both hemispheres, but significant midlatitude column O3 depletion was observed only in the north. We use a three-dimensional chemical transport <span class="hlt">model</span> to determine the mechanisms behind this hemispheric asymmetry. The <span class="hlt">model</span>, forced by European Centre for Medium-Range Weather Forecasts ERA-Interim reanalyses and updated aerosol surface area density, successfully simulates observed large column NO2 decreases and the different extents of ozone depletion in the two hemispheres. The chemical ozone loss is similar in the Northern (NH) and Southern Hemispheres (SH), but the contrasting role of dynamics increases the depletion in the NH and decreases it in the SH. The relevant SH dynamics are not captured as well by earlier ERA-40 reanalyses. Overall, the smaller SH column O3 depletion can be attributed to dynamical variability and smaller SH background lower stratosphere O3 concentrations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19880017774','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19880017774"><span id="translatedtitle">Aeroelastic <span class="hlt">modeling</span> of rotor blades with spanwise variable elastic axis offset: Classic issues <span class="hlt">revisited</span> and new formulations</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Bielawa, Richard L.</p> <p>1988-01-01</p> <p>In response to a systematic methodology assessment program directed to the aeroelastic stability of hingeless helicopter rotor blades, improved basic aeroelastic reformulations and new formulations relating to structural sweep were achieved. Correlational results are presented showing the substantially improved performance of the G400 aeroelastic analysis incorporating these new formulations. The formulations pertain partly to sundry solutions to classic problem areas, relating to dynamic inflow with vortex-ring state operation and basic blade kinematics, but mostly to improved physical <span class="hlt">modeling</span> of elastic axis offset (structural sweep) in the presence of nonlinear structural twist. Specific issues addressed are an alternate <span class="hlt">modeling</span> of the delta EI torsional excitation due to compound bending using a force integration approach, and the detailed kinematic representation of an elastically deflected point mass of a beam with both structural sweep and nonlinear twist.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/18642949','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/18642949"><span id="translatedtitle">The CP43 proximal antenna complex of higher plant photosystem II <span class="hlt">revisited</span>: <span class="hlt">modeling</span> and hole burning study. I.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Dang, Nhan C; Zazubovich, Valter; Reppert, Mike; Neupane, Bhanu; Picorel, Rafael; Seibert, Michael; Jankowiak, Ryszard</p> <p>2008-08-14</p> <p>The CP43 core antenna complex of photosystem II is known to possess two quasi-degenerate "red"-trap states (Jankowiak, R. et al. J. Phys. Chem. B 2000, 104, 11805). It has been suggested recently (Zazubovich, V.; Jankowiak, R. J. Lumin. 2007, 127, 245) that the site distribution functions of the red states (A and B) are uncorrelated and that narrow holes are burned in the subpopulations of chlorophylls (Chls) from states A and B that are the lowest-energy Chl in their complex and previously thought not to transfer energy. This <span class="hlt">model</span> of uncorrelated excitation energy transfer (EET) between the quasidegenerate bands is expanded by taking into account both electron-phonon and vibrational coupling. The <span class="hlt">model</span> is applied to fit simultaneously absorption, emission, zero-phonon action, and transient hole burned (HB) spectra obtained for the CP43 complex with minimized contribution from aggregation. It is demonstrated that the above listed spectra can be well-fitted using the uncorrelated EET <span class="hlt">model</span>, providing strong evidence for the existence of efficient energy transfer between the two lowest energy states, A and B (either from A to B or from B to A), in CP43. Possible candidate Chls for the low-energy A and B states are discussed, providing a link between CP43 structure and spectroscopy. Finally, we propose that persistent holes originate from regular NPHB accompanied by the redistribution of oscillator strength due to excitonic interactions, rather than photoconversion involving Chl-protein hydrogen bonding, as suggested before ( Hughes J. L. et al. Biochemistry 2006, 45, 12345 ). In the accompanying paper (Reppert, M.; Zazubovich, V.; Dang, N. C.; Seibert, M.; Jankowiak, R. J. Phys. Chem. B 2008, 9934), it is demonstrated that the <span class="hlt">model</span> discussed in this manuscript is consistent with excitonic calculations, which also provide very good fits to both transient and persistent HB spectra obtained under non-line-narrowing conditions. PMID:18642949</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015MNRAS.451.2015O','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015MNRAS.451.2015O"><span id="translatedtitle"><span class="hlt">Revisiting</span> the rigidly rotating magnetosphere <span class="hlt">model</span> for σ Ori E - II. Magnetic Doppler imaging, arbitrary field RRM, and light variability</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Oksala, M. E.; Kochukhov, O.; Krtička, J.; Townsend, R. H. D.; Wade, G. A.; Prvák, M.; Mikulášek, Z.; Silvester, J.; Owocki, S. P.</p> <p>2015-08-01</p> <p>The initial success of the Rigidly Rotating Magnetosphere (RRM) <span class="hlt">model</span> application to the B2Vp star σ Ori E by Townsend, Owocki & Groote triggered a renewed era of observational monitoring of this archetypal object. We utilize high-resolution spectropolarimetry and the magnetic Doppler imaging (MDI) technique to simultaneously determine the magnetic configuration, which is predominately dipolar, with a polar strength Bd = 7.3-7.8 kG and a smaller non-axisymmetric quadrupolar contribution, as well as the surface distribution of abundance of He, Fe, C, and Si. We describe a revised RRM <span class="hlt">model</span> that now accepts an arbitrary surface magnetic field configuration, with the field topology from the MDI <span class="hlt">models</span> used as input. The resulting synthetic H α emission and broad-band photometric observations generally agree with observations, however, several features are poorly fit. To explore the possibility of a photospheric contribution to the observed photometric variability, the MDI abundance maps were used to compute a synthetic photospheric light curve to determine the effect of the surface inhomogeneities. Including the computed photospheric brightness modulation fails to improve the agreement between the observed and computed photometry. We conclude that the discrepancies cannot be explained as an effect of inhomogeneous surface abundance. Analysis of the UV light variability shows good agreement between observed variability and computed light curves, supporting the accuracy of the photospheric light variation calculation. We thus conclude that significant additional physics is necessary for the RRM <span class="hlt">model</span> to acceptably reproduce observations of not only σ Ori E, but also other similar stars with significant stellar wind-magnetic field interactions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013CP....423...62F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013CP....423...62F"><span id="translatedtitle">Structural <span class="hlt">models</span> of activated γ-alumina surfaces <span class="hlt">revisited</span>: Thermodynamics, NMR and IR spectroscopies from ab initio calculations</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ferreira, Ary R.; Küçükbenli, Emine; de Gironcoli, Stefano; Souza, Wladmir F.; Chiaro, Sandra Shirley X.; Konstantinova, Elena; Leitão, Alexandre A.</p> <p>2013-09-01</p> <p>The activation of highly catalytic γ-alumina surfaces by thermal treatment and the description of the related chemical processes at atomic scale is a topical issue. According to a recent study [J. Am. Chem. Soc. 134 (2012) 14430], the enhanced reactivity of γ-alumina has been associated to tri-coordinated aluminum sites which supposedly are exposed exclusively on the (1 1 0) surfaces of this oxide. In this work, we explore this possibility by <span class="hlt">modeling</span> the (1 0 0) and (1 1 0) terminations using Krokidis et al. [J. Phys. Chem. B 105 (2001) 5121] bulk structure and performing an extensive search of the most stable hydrated surface <span class="hlt">models</span> at conditions consistent with experiment. Among the 156 structures analyzed, we identify several “metastable” <span class="hlt">models</span> for the (1 1 0) surface with a considerable probability of containing the AlIII centers at OH coverages of 9.0 and 6.0 OH/nm2. We then test the reactivity of these sites through their Lewis acidity by simulating the CO adsorbtion on the surface and our results confirm the high reactivity of AlIII centers. Based on the Gibbs free energy of the explored structures, we carry on a thermodynamical analysis at varying hydroxylation degrees and pretreatment temperatures and simulate the experimental volcano-type behavior reported in [J. Am. Chem. Soc. 134 (2012) 14430] and predict the optimum pretreatment temperature as 700 °C, in very good agreement with experimental findings. We further use infrared and solid state MAS NMR spectroscopies and reproduce the 1H MAS NMR spectra under high vacuum conditions (10-5 Torr). The strong resemblance of spectra to the experimental ones in the literature [J. Phys. Chem. C 116 (2012) 834] validate further the structural <span class="hlt">models</span> we have generated in this study.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016EM%26P..117..109K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016EM%26P..117..109K"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Single-Fluid <span class="hlt">Modeling</span> of the Solar Wind-Comet Interaction: Closer Look at the Cometosheath</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kartalev, M.; Keremidarska, V.; Dryer, M.</p> <p>2016-04-01</p> <p>Earlier developed single fluid gas-dynamic <span class="hlt">model</span> of solar wind-comet ionosphere interaction is applied to reveal some specifics in the morphology of the shocked "contaminated" solar wind region (cometosheath). The <span class="hlt">model</span> is based on the Euler equations with added mass-loading, mass-loss and frictional force terms. Numerous reactions are taken into account in these terms including photoionization, charge transfer, dissociative recombination and ion-neutral frictional force. The electromagnetic terms are omitted, thus reducing the MHD single-fluid system of equations to gas-dynamic one. The used shock-fitting numerical scheme allows the separation of distinct areas formed by the considered interaction and exploration of their properties in detail. Attention is focused on the region between the shock wave and the contact surface as well as on the positions of these boundaries. Accurate examination of the distribution of density, temperature and velocity reveals spatial variations that resemble the variations registered by a number of spacecraft in the vicinity of comets. No specific comparisons with data are made at this stage. Two very first events of the Rosetta spacecraft's crossing of the magnetic cavity boundary around Comet 67P/Churyumov-Gerasimenko are discussed using a "faux-transient" application of our steady-state <span class="hlt">model</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2889493','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2889493"><span id="translatedtitle">Integrating evidence from neuroimaging and neuropsychological studies of obsessive-compulsive disorder: The orbitofronto-striatal <span class="hlt">model</span> <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Menzies, Lara; Chamberlain, Samuel R.; Laird, Angela R.; Thelen, Sarah M.; Sahakian, Barbara J.; Bullmore, Ed T.</p> <p>2010-01-01</p> <p>Obsessive-compulsive disorder (OCD) is a common, heritable and disabling neuropsychiatric disorder. Theoretical <span class="hlt">models</span> suggest that OCD is underpinned by functional and structural abnormalities in orbitofronto-striatal circuits. Evidence from cognitive and neuroimaging studies (functional and structural magnetic resonance imaging (MRI) and positron emission tomography (PET)) have generally been taken to be supportive of these theoretical <span class="hlt">models</span>; however, results from these studies have not been entirely congruent with each other. With the advent of whole brain-based structural imaging techniques, such as voxel-based morphometry and multivoxel analyses, we consider it timely to assess neuroimaging findings to date, and to examine their compatibility with cognitive studies and orbitofronto-striatal <span class="hlt">models</span>. As part of this assessment, we performed a quantitative, voxel-level meta-analysis of functional MRI findings, which revealed consistent abnormalities in orbitofronto-striatal and other additional areas in OCD. This review also considers the evidence for involvement of other brain areas outside orbitofronto-striatal regions in OCD, the limitations of current imaging techniques, and how future developments in imaging may aid our understanding of OCD. PMID:18061263</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016EM%26P..tmp....6K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016EM%26P..tmp....6K"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Single-Fluid <span class="hlt">Modeling</span> of the Solar Wind-Comet Interaction: Closer Look at the Cometosheath</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kartalev, M.; Keremidarska, V.; Dryer, M.</p> <p>2016-03-01</p> <p>Earlier developed single fluid gas-dynamic <span class="hlt">model</span> of solar wind-comet ionosphere interaction is applied to reveal some specifics in the morphology of the shocked "contaminated" solar wind region (cometosheath). The <span class="hlt">model</span> is based on the Euler equations with added mass-loading, mass-loss and frictional force terms. Numerous reactions are taken into account in these terms including photoionization, charge transfer, dissociative recombination and ion-neutral frictional force. The electromagnetic terms are omitted, thus reducing the MHD single-fluid system of equations to gas-dynamic one. The used shock-fitting numerical scheme allows the separation of distinct areas formed by the considered interaction and exploration of their properties in detail. Attention is focused on the region between the shock wave and the contact surface as well as on the positions of these boundaries. Accurate examination of the distribution of density, temperature and velocity reveals spatial variations that resemble the variations registered by a number of spacecraft in the vicinity of comets. No specific comparisons with data are made at this stage. Two very first events of the Rosetta spacecraft's crossing of the magnetic cavity boundary around Comet 67P/Churyumov-Gerasimenko are discussed using a "faux-transient" application of our steady-state <span class="hlt">model</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3385561','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3385561"><span id="translatedtitle">Oculomotor learning <span class="hlt">revisited</span>: a <span class="hlt">model</span> of reinforcement learning in the basal ganglia incorporating an efference copy of motor actions</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Fee, Michale S.</p> <p>2012-01-01</p> <p>In its simplest formulation, reinforcement learning is based on the idea that if an action taken in a particular context is followed by a favorable outcome, then, in the same context, the tendency to produce that action should be strengthened, or reinforced. While reinforcement learning forms the basis of many current theories of basal ganglia (BG) function, these <span class="hlt">models</span> do not incorporate distinct computational roles for signals that convey context, and those that convey what action an animal takes. Recent experiments in the songbird suggest that vocal-related BG circuitry receives two functionally distinct excitatory inputs. One input is from a cortical region that carries context information about the current “time” in the motor sequence. The other is an efference copy of motor commands from a separate cortical brain region that generates vocal variability during learning. Based on these findings, I propose here a general <span class="hlt">model</span> of vertebrate BG function that combines context information with a distinct motor efference copy signal. The signals are integrated by a learning rule in which efference copy inputs gate the potentiation of context inputs (but not efference copy inputs) onto medium spiny neurons in response to a rewarded action. The hypothesis is described in terms of a circuit that implements the learning of visually guided saccades. The <span class="hlt">model</span> makes testable predictions about the anatomical and functional properties of hypothesized context and efference copy inputs to the striatum from both thalamic and cortical sources. PMID:22754501</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2710023','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2710023"><span id="translatedtitle">Magainin 2 <span class="hlt">Revisited</span>: A Test of the Quantitative <span class="hlt">Model</span> for the All-or-None Permeabilization of Phospholipid Vesicles</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Gregory, Sonia M.; Pokorny, Antje; Almeida, Paulo F.F.</p> <p>2009-01-01</p> <p>Abstract The all-or-none kinetic <span class="hlt">model</span> that we recently proposed for the antimicrobial peptide cecropin A is tested here for magainin 2. In mixtures of phosphatidylcholine (PC)/phosphatidylglycerol (PG) 50:50 and 70:30, release of contents from lipid vesicles occurs in an all-or-none fashion and the differences between PC/PG 50:50 and 70:30 can be ascribed mainly to differences in binding, which was determined independently and is ∼20 times greater to PC/PG 50:50 than to 70:30. Only one variable parameter, β, corresponding to the ratio of the rates of pore opening to pore closing, is used to fit dye release kinetics from these two mixtures, for several peptide/lipid ratios ranging from 1:25 to 1:200. However, unlike for cecropin A where it stays almost constant, β increases five times as the PG content of the vesicles increases from 30 to 50%. Thus, magainin 2 is more sensitive to anionic lipid content than cecropin A. But overall, magainin follows the same all-or-none kinetic <span class="hlt">model</span> as cecropin A in these lipid mixtures, with slightly different parameter values. When the PG content is reduced to 20 mol %, dye release becomes very low; the mechanism appears to change, and is consistent with a graded kinetic <span class="hlt">model</span>. We suggest that the peptide may be inducing formation of PG domains. In either mechanism, no peptide oligomerization occurs and magainin catalyzes dye release in proportion to its concentration on the membrane in a peptide state that we call a pore. We envision this structure as a chaotic or stochastic type of pore, involving both lipids and peptides, not a well-defined, peptide-lined channel. PMID:19134472</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4690123','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4690123"><span id="translatedtitle">Risk Assessment of Deoxynivalenol by <span class="hlt">Revisiting</span> Its Bioavailability in Pig and Rat <span class="hlt">Models</span> to Establish Which Is More Suitable</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Saint-Cyr, Manuel Jimmy; Perrin-Guyomard, Agnès; Manceau, Jacqueline; Houée, Paméla; Delmas, Jean-Michel; Rolland, Jean-Guy; Laurentie, Michel</p> <p>2015-01-01</p> <p>Due to its toxic properties, high stability, and prevalence, the presence of deoxynivalenol (DON) in the food chain is a major threat to food safety and therefore a health risk for both humans and animals. In this study, experiments were carried out with sows and female rats to examine the kinetics of DON after intravenous and oral administration at 100 µg/kg of body weight. After intravenous administration of DON in pigs, a two-compartment <span class="hlt">model</span> with rapid initial distribution (0.030 ± 0.019 h) followed by a slower terminal elimination phase (1.53 ± 0.54 h) was fitted to the concentration profile of DON in pig plasma. In rats, a short elimination half-life (0.46 h) and a clearance of 2.59 L/h/kg were estimated by sparse sampling non-compartmental analysis. Following oral exposure, DON was rapidly absorbed and reached maximal plasma concentrations (Cmax) of 42.07 ± 8.48 and 10.44 ± 5.87 µg/L plasma after (tmax) 1.44 ± 0.52 and 0.17 h in pigs and rats, respectively. The mean bioavailability of DON was 70.5% ± 25.6% for pigs and 47.3% for rats. In the framework of DON risk assessment, these two animal <span class="hlt">models</span> could be useful in an exposure scenario in two different ways because of their different bioavailability. PMID:26633505</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016MNRAS.458..508B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016MNRAS.458..508B"><span id="translatedtitle">Active binary R Arae <span class="hlt">revisited</span>: Bringing the secondary component to light and physical <span class="hlt">modelling</span> of the circumstellar material</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bakış, H.; Bakış, V.; Eker, Z.; Demircan, O.</p> <p>2016-05-01</p> <p>The spectral lines of the secondary component of the active binary system R Ara were uncovered for the first time, which allowed directly to determine the parameters of the spectroscopic orbit. The mass ratio of the system is updated to a new observational value of M2/M1 = 0.305 ± 0.005 which is ˜20 per cent smaller than the literature value (M2/M1 = 0.39). <span class="hlt">Modelling</span> the reconstructed component spectra yielded the equatorial rotational velocities of the components as vrot1 = 202 km s-1 and vrot2 = 73 km s-1 indicating a very fast rotation (˜5 times faster than the synchronous rotation velocity) for the primary and synchronous rotation for the secondary component. The circumstellar material in the system was investigated using the Hipparcossatellite data and the high-resolution (R ˜ 41 000) spectral data. According to our <span class="hlt">model</span>, there is always material transferring from the secondary component on to the primary causing a hot region on its surface. The structural difference between the spectra taken at the same orbital phase but at different epochs proved that the density and the velocity of the transferring material are variable. There are three main trends in the light curve and spectral line variations suggesting the activity cycles for the system, namely quiescent, moderate and, active cycles. It was estimated that the circumstellar material around could be extended to large distances up to 40 R⊙ from the system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26633505','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26633505"><span id="translatedtitle">Risk Assessment of Deoxynivalenol by <span class="hlt">Revisiting</span> Its Bioavailability in Pig and Rat <span class="hlt">Models</span> to Establish Which Is More Suitable.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Saint-Cyr, Manuel Jimmy; Perrin-Guyomard, Agnès; Manceau, Jacqueline; Houée, Paméla; Delmas, Jean-Michel; Rolland, Jean-Guy; Laurentie, Michel</p> <p>2015-12-01</p> <p>Due to its toxic properties, high stability, and prevalence, the presence of deoxynivalenol (DON) in the food chain is a major threat to food safety and therefore a health risk for both humans and animals. In this study, experiments were carried out with sows and female rats to examine the kinetics of DON after intravenous and oral administration at 100 µg/kg of body weight. After intravenous administration of DON in pigs, a two-compartment <span class="hlt">model</span> with rapid initial distribution (0.030 ± 0.019 h) followed by a slower terminal elimination phase (1.53 ± 0.54 h) was fitted to the concentration profile of DON in pig plasma. In rats, a short elimination half-life (0.46 h) and a clearance of 2.59 L/h/kg were estimated by sparse sampling non-compartmental analysis. Following oral exposure, DON was rapidly absorbed and reached maximal plasma concentrations (Cmax) of 42.07 ± 8.48 and 10.44 ± 5.87 µg/L plasma after (t(max)) 1.44 ± 0.52 and 0.17 h in pigs and rats, respectively. The mean bioavailability of DON was 70.5% ± 25.6% for pigs and 47.3% for rats. In the framework of DON risk assessment, these two animal <span class="hlt">models</span> could be useful in an exposure scenario in two different ways because of their different bioavailability. PMID:26633505</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016MNRAS.tmp..105B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016MNRAS.tmp..105B"><span id="translatedtitle">Active Binary R Arae <span class="hlt">Revisited</span>: Bringing the Secondary Component to Light and Physical <span class="hlt">Modeling</span> of the Circumstellar Material</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bak??, H.; Bak??, V.; Eker, Z.; Demircan, O.</p> <p>2016-02-01</p> <p>The spectral lines of the secondary component of the active binary system R Ara were uncovered for the first time, which allowed directly to determine the parameters of the spectroscopic orbit. The mass ratio of the system is updated to a new observational value of M2/M1 = 0.305 0.005 which is 20 per cent smaller than the literature value (M2/M1 = 0.39). <span class="hlt">Modeling</span> the reconstructed component spectra yielded the equatorial rotational velocities of the components as vrot1 = 202 km/s and vrot2 = 73 km/s indicating a very fast rotation (5 times faster than the synchronous rotation velocity) for the primary and synchronous rotation for the secondary component. The circumstellar material in the system was investigated using the Hipparcos satellite data and the high resolution (R 41000) spectral data. According to our <span class="hlt">model</span>, there is always material transferring from the secondary component onto the primary causing a hot region on its surface. The structural difference between the spectra taken at the same orbital phase but at different epochs proved that the density and the velocity of the transferring material are variable. There are three main trends in the light curve and spectral line variations suggesting the activity cycles for the system, namely quiescent, moderate and active cycles. It was estimated that the circumstellar material around could be extended to large distances up to 40 R? from the system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016ClDy...46.3239L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016ClDy...46.3239L"><span id="translatedtitle">Observational constraints on atmospheric and oceanic cross-equatorial heat transports: <span class="hlt">revisiting</span> the precipitation asymmetry problem in climate <span class="hlt">models</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Loeb, Norman G.; Wang, Hailan; Cheng, Anning; Kato, Seiji; Fasullo, John T.; Xu, Kuan-Man; Allan, Richard P.</p> <p>2016-05-01</p> <p>Satellite based top-of-atmosphere (TOA) and surface radiation budget observations are combined with mass corrected vertically integrated atmospheric energy divergence and tendency from reanalysis to infer the regional distribution of the TOA, atmospheric and surface energy budget terms over the globe. Hemispheric contrasts in the energy budget terms are used to determine the radiative and combined sensible and latent heat contributions to the cross-equatorial heat transports in the atmosphere (AHTEQ) and ocean (OHTEQ). The contrast in net atmospheric radiation implies an AHTEQ from the northern hemisphere (NH) to the southern hemisphere (SH) (0.75 PW), while the hemispheric difference in sensible and latent heat implies an AHTEQ in the opposite direction (0.51 PW), resulting in a net NH to SH AHTEQ (0.24 PW). At the surface, the hemispheric contrast in the radiative component (0.95 PW) dominates, implying a 0.44 PW SH to NH OHTEQ. Coupled <span class="hlt">model</span> intercomparison project phase 5 (CMIP5) <span class="hlt">models</span> with excessive net downward surface radiation and surface-to-atmosphere sensible and latent heat transport in the SH relative to the NH exhibit anomalous northward AHTEQ and overestimate SH tropical precipitation. The hemispheric bias in net surface radiative flux is due to too much longwave surface radiative cooling in the NH tropics in both clear and all-sky conditions and excessive shortwave surface radiation in the SH subtropics and extratropics due to an underestimation in reflection by clouds.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22096856','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22096856"><span id="translatedtitle">On Monte Carlo <span class="hlt">modeling</span> of megavoltage photon beams: A <span class="hlt">revisited</span> study on the sensitivity of beam parameters</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Chibani, Omar; Moftah, Belal; Ma, C.-M. Charlie</p> <p>2011-01-15</p> <p>Purpose: To commission Monte Carlo beam <span class="hlt">models</span> for five Varian megavoltage photon beams (4, 6, 10, 15, and 18 MV). The goal is to closely match measured dose distributions in water for a wide range of field sizes (from 2x2 to 35x35 cm{sup 2}). The second objective is to reinvestigate the sensitivity of the calculated dose distributions to variations in the primary electron beam parameters. Methods: The GEPTS Monte Carlo code is used for photon beam simulations and dose calculations. The linear accelerator geometric <span class="hlt">models</span> are based on (i) manufacturer specifications, (ii) corrections made by Chibani and Ma [''On the discrepancies between Monte Carlo dose calculations and measurements for the 18 MV Varian photon beam,'' Med. Phys. 34, 1206-1216 (2007)], and (iii) more recent drawings. Measurements were performed using pinpoint and Farmer ionization chambers, depending on the field size. Phase space calculations for small fields were performed with and without angle-based photon splitting. In addition to the three commonly used primary electron beam parameters (E{sub AV} is the mean energy, FWHM is the energy spectrum broadening, and R is the beam radius), the angular divergence ({theta}) of primary electrons is also considered. Results: The calculated and measured dose distributions agreed to within 1% local difference at any depth beyond 1 cm for different energies and for field sizes varying from 2x2 to 35x35 cm{sup 2}. In the penumbra regions, the distance to agreement is better than 0.5 mm, except for 15 MV (0.4-1 mm). The measured and calculated output factors agreed to within 1.2%. The 6, 10, and 18 MV beam <span class="hlt">models</span> use {theta}=0 deg., while the 4 and 15 MV beam <span class="hlt">models</span> require {theta}=0.5 deg. and 0.6 deg., respectively. The parameter sensitivity study shows that varying the beam parameters around the solution can lead to 5% differences with measurements for small (e.g., 2x2 cm{sup 2}) and large (e.g., 35x35 cm{sup 2}) fields, while a perfect agreement is maintained for the 10x10 cm{sup 2} field. The influence of R on the central-axis depth dose and the strong influence of {theta} on the lateral dose profiles are demonstrated. Conclusions: Dose distributions for very small and very large fields were proved to be more sensitive to variations in E{sub AV}, R, and {theta} in comparison with the 10x10 cm{sup 2} field. Monte Carlo beam <span class="hlt">models</span> need to be validated for a wide range of field sizes including small field sizes (e.g., 2x2 cm{sup 2}).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015CeMDA.121....1I','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015CeMDA.121....1I"><span id="translatedtitle"><span class="hlt">Revisiting</span> Lambert's problem</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Izzo, Dario</p> <p>2015-01-01</p> <p>The orbital boundary value problem, also known as Lambert problem, is <span class="hlt">revisited</span>. Building upon Lancaster and Blanchard approach, new relations are revealed and a new variable representing all problem classes, under L-similarity, is used to express the time of flight equation. In the new variable, the time of flight curves have two oblique asymptotes and they mostly appear to be conveniently approximated by piecewise continuous lines. We use and invert such a simple approximation to provide an efficient initial guess to an Householder iterative method that is then able to converge, for the single revolution case, in only two iterations. The resulting algorithm is compared, for single and multiple revolutions, to Gooding's procedure revealing to be numerically as accurate, while having a significantly smaller computational complexity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012EOSTr..93Q.520B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012EOSTr..93Q.520B"><span id="translatedtitle">Satellite failures <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Balcerak, Ernie</p> <p>2012-12-01</p> <p>In January 1994, the two geostationary satellites known as Anik-E1 and Anik-E2, operated by Telesat Canada, failed one after the other within 9 hours, leaving many northern Canadian communities without television and data services. The outage, which shut down much of the country's broadcast television for hours and cost Telesat Canada more than $15 million, generated significant media attention. Lam et al. used publicly available records to <span class="hlt">revisit</span> the event; they looked at failure details, media coverage, recovery effort, and cost. They also used satellite and ground data to determine the precise causes of those satellite failures. The researchers traced the entire space weather event from conditions on the Sun through the interplanetary medium to the particle environment in geostationary orbit.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/16132203','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/16132203"><span id="translatedtitle">The Nelson's syndrome... <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Assié, Guillaume; Bahurel, Hélène; Bertherat, Jérôme; Kujas, Michèle; Legmann, Paul; Bertagna, Xavier</p> <p>2004-01-01</p> <p>Adrenalectomy is a radical therapeutic approach to control hypercortisolism in some patients with Cushing's disease. However it may be complicated by the Nelson's syndrome, defined by the association of a pituitary macroadenoma and high ACTH secretion after adrenalectomy. This definition has not changed since the end of the fifties. Today the Nelson's syndrome must be <span class="hlt">revisited</span> with new to criteria using more sensitive diagnostic tools, especially the pituitary magnetic resonance imaging. In this paper we will review the pathophysiological aspects of corticotroph tumor growth, with reference to the impact of adrenalectomy. The main epidemiological data on the Nelson's syndrome will be presented. More importantly, we will propose a new pathophysiological and practical approach to this question which attempts to evaluate the Corticotroph Tumor Progression after adrenalectomy, rather than to diagnose the Nelson's syndrome. We will discuss the consequences for the management of Cushing's disease patients after adrenalectomy, and will also draw some perspectives. PMID:16132203</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li class="active"><span>12</span></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_12 --> <div id="page_13" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li class="active"><span>13</span></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="241"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4652768','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4652768"><span id="translatedtitle"><span class="hlt">Revisiting</span> the structure/function relationships of H/ACA(-like) RNAs: a unified <span class="hlt">model</span> for Euryarchaea and Crenarchaea</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Toffano-Nioche, Claire; Gautheret, Daniel; Leclerc, Fabrice</p> <p>2015-01-01</p> <p>A structural and functional classification of H/ACA and H/ACA-like motifs is obtained from the analysis of the H/ACA guide RNAs which have been identified previously in the genomes of Euryarchaea (Pyrococcus) and Crenarchaea (Pyrobaculum). A unified structure/function <span class="hlt">model</span> is proposed based on the common structural determinants shared by H/ACA and H/ACA-like motifs in both Euryarchaea and Crenarchaea. Using a computational approach, structural and energetic rules for the guide:target RNA-RNA interactions are derived from structural and functional data on the H/ACA RNP particles. H/ACA(-like) motifs found in Pyrococcus are evaluated through the classification and their biological relevance is discussed. Extra-ribosomal targets found in both Pyrococcus and Pyrobaculum might support the hypothesis of a gene regulation mediated by H/ACA(-like) guide RNAs in archaea. PMID:26240384</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016JHEP...03..145C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016JHEP...03..145C"><span id="translatedtitle"><span class="hlt">Revisiting</span> R-invariant direct gauge mediation</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Chiang, Cheng-Wei; Harigaya, Keisuke; Ibe, Masahiro; Yanagida, Tsutomu T.</p> <p>2016-03-01</p> <p>We <span class="hlt">revisit</span> a special <span class="hlt">model</span> of gauge mediated supersymmetry breaking, the " R-invariant direct gauge mediation." We pay particular attention to whether the <span class="hlt">model</span> is consistent with the minimal <span class="hlt">model</span> of the μ-term, i.e., a simple mass term of the Higgs doublets in the superpotential. Although the incompatibility is highlighted in view of the current experimental constraints on the superparticle masses and the observed Higgs boson mass, the minimal μ-term can be consistent with the R-invariant gauge mediation <span class="hlt">model</span> via a careful choice of <span class="hlt">model</span> parameters. We derive an upper limit on the gluino mass from the observed Higgs boson mass. We also discuss whether the <span class="hlt">model</span> can explain the 3 σ excess of the Z + jets + E T miss events reported by the ATLAS collaboration.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3100657','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3100657"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Affect Regulation <span class="hlt">Model</span> of Binge Eating: A Meta-Analysis of Studies using Ecological Momentary Assessment</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Haedt-Matt, Alissa A.; Keel, Pamela K.</p> <p>2011-01-01</p> <p>The affect regulation <span class="hlt">model</span> of binge eating, which posits that patients binge eat to reduce negative affect (NA), has received support from cross-sectional and laboratory-based studies. Ecological momentary assessment (EMA) involves momentary ratings and repeated assessments over time and is ideally suited to identify temporal antecedents and consequences of binge eating. This meta-analytic review includes EMA studies of affect and binge eating. Electronic database and manual searches produced 36 EMA studies with N = 968 participants (89% Caucasian women). Meta-analyses examined changes in affect before and after binge eating using within-subjects standardized mean gain effect sizes (ES). Results supported greater NA preceding binge eating relative to average affect (ES = .63) and affect before regular eating (ES = .68). However, NA increased further following binge episodes (ES = .50). Preliminary findings suggested that NA decreased following purging in Bulimia Nervosa (ES = −.46). Moderators included diagnosis (with significantly greater elevations of NA prior to bingeing in Binge Eating Disorder compared to Bulimia Nervosa) and binge definition (with significantly smaller elevations of NA before binge versus regular eating episodes for the DSM definition compared to lay definitions of binge eating). Overall, results fail to support the affect regulation <span class="hlt">model</span> of binge eating and challenge reductions in NA as a maintenance factor for binge eating. However, limitations of this literature include unidimensional analyses of NA and inadequate examination of affect during binge eating as binge eating may regulate only specific facets of affect or may reduce NA only during the episode. PMID:21574678</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/18162598','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/18162598"><span id="translatedtitle">Silicon uptake in diatoms <span class="hlt">revisited</span>: a <span class="hlt">model</span> for saturable and nonsaturable uptake kinetics and the role of silicon transporters.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Thamatrakoln, Kimberlee; Hildebrand, Mark</p> <p>2008-03-01</p> <p>The silicic acid uptake kinetics of diatoms were studied to provide a mechanistic explanation for previous work demonstrating both nonsaturable and Michaelis-Menten-type saturable uptake. Using (68)Ge(OH)(4) as a radiotracer for Si(OH)(4), we showed a time-dependent transition from nonsaturable to saturable uptake kinetics in multiple diatom species. In cells grown under silicon (Si)-replete conditions, Si(OH)(4) uptake was initially nonsaturable but became saturable over time. Cells prestarved for Si for 24 h exhibited immediate saturable kinetics. Data suggest nonsaturability was due to surge uptake when intracellular Si pool capacity was high, and saturability occurred when equilibrium was achieved between pool capacity and cell wall silica incorporation. In Thalassiosira pseudonana at low Si(OH)(4) concentrations, uptake followed sigmoidal kinetics, indicating regulation by an allosteric mechanism. Competition of Si(OH)(4) uptake with Ge(OH)(4) suggested uptake at low Si(OH)(4) concentrations was mediated by Si transporters. At high Si(OH)(4), competition experiments and nonsaturability indicated uptake was not carrier mediated and occurred by diffusion. Zinc did not appear to be directly involved in Si(OH)(4) uptake, in contrast to a previous suggestion. A <span class="hlt">model</span> for Si(OH)(4) uptake in diatoms is presented that proposes two control mechanisms: active transport by Si transporters at low Si(OH)(4) and diffusional transport controlled by the capacity of intracellular pools in relation to cell wall silica incorporation at high Si(OH)(4). The <span class="hlt">model</span> integrates kinetic and equilibrium components of diatom Si(OH)(4) uptake and consistently explains results in this and previous investigations. PMID:18162598</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015SPIE.9646E..05M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015SPIE.9646E..05M"><span id="translatedtitle"><span class="hlt">Revisiting</span> Intel Xeon Phi optimization of Thompson cloud microphysics scheme in Weather Research and Forecasting (WRF) <span class="hlt">model</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Mielikainen, Jarno; Huang, Bormin; Huang, Allen</p> <p>2015-10-01</p> <p>The Thompson cloud microphysics scheme is a sophisticated cloud microphysics scheme in the Weather Research and Forecasting (WRF) <span class="hlt">model</span>. The scheme is very suitable for massively parallel computation as there are no interactions among horizontal grid points. Compared to the earlier microphysics schemes, the Thompson scheme incorporates a large number of improvements. Thus, we have optimized the speed of this important part of WRF. Intel Many Integrated Core (MIC) ushers in a new era of supercomputing speed, performance, and compatibility. It allows the developers to run code at trillions of calculations per second using the familiar programming <span class="hlt">model</span>. In this paper, we present our results of optimizing the Thompson microphysics scheme on Intel Many Integrated Core Architecture (MIC) hardware. The Intel Xeon Phi coprocessor is the first product based on Intel MIC architecture, and it consists of up to 61 cores connected by a high performance on-die bidirectional interconnect. The coprocessor supports all important Intel development tools. Thus, the development environment is familiar one to a vast number of CPU developers. Although, getting a maximum performance out of MICs will require using some novel optimization techniques. New optimizations for an updated Thompson scheme are discusses in this paper. The optimizations improved the performance of the original Thompson code on Xeon Phi 7120P by a factor of 1.8x. Furthermore, the same optimizations improved the performance of the Thompson on a dual socket configuration of eight core Intel Xeon E5-2670 CPUs by a factor of 1.8x compared to the original Thompson code.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013OptMa..36..575L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013OptMa..36..575L"><span id="translatedtitle">Crystal-field study for Yb3+ doped KY(WO4)2 crystal - <span class="hlt">Revisited</span> based on superposition <span class="hlt">model</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Liu, Hong-Gang; Zheng, Wen-Chen</p> <p>2013-12-01</p> <p>The optical spectra and electron paramagnetic resonance (EPR) parameters (gi and hyperfine structure constants Ai, i = x, y, z) for Yb3+:KY(WO4)2 crystal have been simultaneously explained by a crystal-field study based on superposition <span class="hlt">model</span> (SPM). The deficiencies in a recent paper by Trabelsi et al. (2010) have been clarified and solved in the present work. The more reliable fitted phenomenological crystal-field parameters (CFPs) have been confirmed and monoclinic standardization of the obtained CFPs for Yb3+:KY(WO4)2 crystal is performed to ensure direct comparison with other rare earth ion doped potassium rare-earth double tungstates. By SPM calculations in this work, two individual EPR experiments with greatly different y-directional principal g factors for Yb3+:KY(WO4)2 crystal have been analyzed and possible reason for this large difference is also given. It indicates that magnetic dipolar and exchange interactions among different rare earth ions will play an important role in determining their magnetic properties in crystal under low temperature and more investigations should be carried out. The present procedures for SPM analysis can be applied to other crystal field environment with low site symmetry.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013Nanos...511919L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013Nanos...511919L"><span id="translatedtitle"><span class="hlt">Revisiting</span> catalytic <span class="hlt">model</span> reaction p-nitrophenol/NaBH4 using metallic nanoparticles coated on polymeric spheres</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Li, Maolin; Chen, Guofang</p> <p>2013-11-01</p> <p>The early reported pseudo-first-order reaction kinetics of the polymer-supported metallic nanocatalysts for the <span class="hlt">model</span> reaction of p-nitrophenol (p-NP)/NaBH4 were probably oversimplified. Here a detailed study of p-NP reduction by NaBH4 in the presence of the raspberry-like poly(allylamine hydrochloride)-modified polymer poly(glycidyl methacrylate) composite sub-microspheres with tunable gold nanoparticles (PGMA@PAH@AuNPs) was presented. Effects of polyelectrolyte concentration, the ratio of polymer spheres to gold nanoparticles, and the solution pH value for composite synthesis on the induction period, reaction time, average reaction rate and average turnover frequency were systematically investigated. Experimental results in all cases of our study revealed an nth order (n > 1) of the p-NP/NaBH4 catalytic reaction by the prepared polymer composite particles. The apparent order of reaction, n, is dependent on the total surface area of the coated gold nanoparticles on the polymer spheres, which can be closely correlated with the tunable gold nanoparticle surface coverage. The mechanism of the observed catalytic activity enhancement was proposed based on active epoxy groups of the polymer spheres and a large adsorption of p-nitrophenolate anions onto the positively-charged spheres.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013JHEP...05..036B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013JHEP...05..036B"><span id="translatedtitle">Higgs portal vector dark matter: <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Baek, Seungwon; Ko, P.; Park, Wan-Il; Senaha, Eibun</p> <p>2013-05-01</p> <p>We <span class="hlt">revisit</span> the Higgs portal vector dark matter <span class="hlt">model</span> including a hidden sector Higgs field that generates the mass of the vector dark matter. The <span class="hlt">model</span> becomes renormalizable and has two scalar bosons, the mixtures of the standard <span class="hlt">model</span> (SM) Higgs and the hidden sector Higgs bosons. The strong bound from direct detection such as XENON100 is evaded due to the cancellation mechanism between the contributions from two scalar bosons. As a result, the <span class="hlt">model</span> becomes still viable in large range of dark matter mass, contrary to some claims in the literature. The Higgs properties are also affected, the signal strengths for the Higgs boson search being universally suppressed relative to the SM value, which could be tested at the LHC in the future.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1186029','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1186029"><span id="translatedtitle">Bohr's 1913 molecular <span class="hlt">model</span> <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Svidzinsky, Anatoly A.; Scully, Marlan O.; Herschbach, Dudley R.</p> <p>2005-01-01</p> <p>It is generally believed that the old quantum theory, as presented by Niels Bohr in 1913, fails when applied to few electron systems, such as the H2 molecule. Here, we find previously undescribed solutions within the Bohr theory that describe the potential energy curve for the lowest singlet and triplet states of H2 about as well as the early wave mechanical treatment of Heitler and London. We also develop an interpolation scheme that substantially improves the agreement with the exact ground-state potential curve of H2 and provides a good description of more complicated molecules such as LiH, Li2, BeH, and He2. PMID:16103360</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2012-title42-vol5/pdf/CFR-2012-title42-vol5-sec488-30.pdf','CFR2012'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2012-title42-vol5/pdf/CFR-2012-title42-vol5-sec488-30.pdf"><span id="translatedtitle">42 CFR 488.30 - <span class="hlt">Revisit</span> user fee for <span class="hlt">revisit</span> surveys.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2012&page.go=Go">Code of Federal Regulations, 2012 CFR</a></p> <p></p> <p>2012-10-01</p> <p>... 42 Public Health 5 2012-10-01 2012-10-01 false <span class="hlt">Revisit</span> user fee for <span class="hlt">revisit</span> surveys. 488.30 Section 488.30 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) STANDARDS AND CERTIFICATION SURVEY, CERTIFICATION, AND ENFORCEMENT PROCEDURES General Provisions § 488.30 <span class="hlt">Revisit</span> user fee...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFM.S52A..01S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFM.S52A..01S"><span id="translatedtitle">Stacking Global Seismograms <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Shearer, P. M.; Buehler, J. S.; Denolle, M.; Fan, W.; Ma, Z.; Mancinelli, N. J.; Matoza, R. S.; Wang, W.; Wang, Y.; Zhan, Z.</p> <p>2014-12-01</p> <p>Over 20 years ago, stacks of global seismograms produced direct images of the global seismic wavefield highlighting the visibility, frequency content, and polarity of known seismic phases, and also identified a host of new phases associated with reflections and phase conversions from upper-mantle discontinuities. Two different stacking methods proved particularly useful: (1) STA/LTA-filtered stacks that describe the local signal-to-noise characteristics of the major seismic phases. These serve to image the entire wavefield in a uniform way for educational purposes and to show which phases are observed most clearly as a guide to future research. These stacks also resolve SH versus SV timing differences consistent with radial anisotropy. (2) Reference-phase stacks that preserve the polarity, amplitude, and timing of traces with respect to a specified target phase. These show a large number of top-side and bottom-side reflections and phase conversions from the 410- and 660-km discontinuities that create weak phases with a characteristic "railroad track" appearance both preceding and following many of the main seismic phases. Reference-phase stacking can also be used to produce coherent surface-wave stacks at very long periods, which directly show the dispersive character of the surface waves. Here we <span class="hlt">revisit</span> and update these stacks by exploiting the vastly increased data now available from the IRIS DMC to produce greatly improved wavefield images. We present several examples of the different stacking approaches and point out their various features, including promising targets for future research.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25412304','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25412304"><span id="translatedtitle"><span class="hlt">Revisiting</span> caspases in sepsis.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Aziz, M; Jacob, A; Wang, P</p> <p>2014-01-01</p> <p>Sepsis is a life-threatening illness that occurs due to an abnormal host immune network which extends through the initial widespread and overwhelming inflammation, and culminates at the late stage of immunosupression. Recently, interest has been shifted toward therapies aimed at reversing the accompanying periods of immune suppression. Studies in experimental animals and critically ill patients have demonstrated that increased apoptosis of lymphoid organs and some parenchymal tissues contributes to this immune suppression, anergy and organ dysfunction. Immediate to the discoveries of the intracellular proteases, caspases for the induction of apoptosis and inflammation, and their striking roles in sepsis have been focused elaborately in a number of original and review articles. Here we <span class="hlt">revisited</span> the different aspects of caspases in terms of apoptosis, pyroptosis, necroptosis and inflammation and focused their links in sepsis by reviewing several recent findings. In addition, we have documented striking perspectives which not only rewrite the pathophysiology, but also modernize our understanding for developing novel therapeutics against sepsis. PMID:25412304</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009LNCS.5848..104S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009LNCS.5848..104S"><span id="translatedtitle">Twin Signature Schemes, <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Schäge, Sven</p> <p></p> <p>In this paper, we <span class="hlt">revisit</span> the twin signature scheme by Naccache, Pointcheval and Stern from CCS 2001 that is secure under the Strong RSA (SRSA) assumption and improve its efficiency in several ways. First, we present a new twin signature scheme that is based on the Strong Diffie-Hellman (SDH) assumption in bilinear groups and allows for very short signatures and key material. A big advantage of this scheme is that, in contrast to the original scheme, it does not require a computationally expensive function for mapping messages to primes. We prove this new scheme secure under adaptive chosen message attacks. Second, we present a modification that allows to significantly increase efficiency when signing long messages. This construction uses collision-resistant hash functions as its basis. As a result, our improvements make the signature length independent of the message size. Our construction deviates from the standard hash-and-sign approach in which the hash value of the message is signed in place of the message itself. We show that in the case of twin signatures, one can exploit the properties of the hash function as an integral part of the signature scheme. This improvement can be applied to both the SRSA based and SDH based twin signature scheme.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JSeis..19..231V','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JSeis..19..231V"><span id="translatedtitle">Moment tensor decompositions <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Vavryčuk, Václav</p> <p>2015-01-01</p> <p>The decomposition of moment tensors into isotropic (ISO), double-couple (DC) and compensated linear vector dipole (CLVD) components is a tool for classifying and physically interpreting seismic sources. Since an increasing quantity and quality of seismic data allow inverting for accurate moment tensors and interpreting details of the source process, an efficient and physically reasonable decomposition of moment and source tensors is necessary. In this paper, the most common moment tensor decompositions are <span class="hlt">revisited</span>, new equivalent formulas of the decompositions are derived, suitable norms of the moment tensors are discussed and the properties of commonly used source-type plots are analysed. The Hudson skewed diamond plot is introduced in a much simpler way than originally proposed. It is shown that not only the Hudson plot but also the diamond CLVD-ISO plot and the Riedesel-Jordan plot conserve the uniform distribution probability of moment eigenvalues if the appropriate norm of moment tensors is applied. When analysing moment tensor uncertainties, no source-type plot is clearly preferable. Since the errors in the eigenvectors and eigenvalues of the moment tensors cannot be easily separated, the moment tensor uncertainties project into the source-type plots in a complicated way. As a consequence, the moment tensors with the same uncertainties project into clusters of a different size. In case of an anisotropic focal area, the complexity of moment tensors of earthquakes prevents their direct interpretation, and the decomposition of moment tensors must be substituted by that of the source tensors.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26332541','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26332541"><span id="translatedtitle"><span class="hlt">Revisiting</span> Buruli ulcer.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Yotsu, Rie R; Murase, Chiaki; Sugawara, Mariko; Suzuki, Koichi; Nakanaga, Kazue; Ishii, Norihisa; Asiedu, Kingsley</p> <p>2015-11-01</p> <p>Buruli ulcer (BU), or Mycobacterium ulcerans infection, is a new emerging infectious disease which has been reported in over 33 countries worldwide. It has been noted not only in tropical areas, such as West Africa where it is most endemic, but also in moderate non-tropical climate areas, including Australia and Japan. Clinical presentation starts with a papule, nodule, plaque or edematous form which eventually leads to extensive skin ulceration. It can affect all age groups, but especially children aged between 5 and 15years in West Africa. Multiple-antibiotic treatment has proven effective, and with surgical intervention at times of severity, it is curable. However, if diagnosis and treatment is delayed, those affected may be left with life-long disabilities. The disease is not yet fully understood, including its route of transmission and pathogenesis. However, due to recent research, several important features of the disease are now being elucidated. Notably, there may be undiagnosed cases in other parts of the world where BU has not yet been reported. Japan exemplifies the finding that awareness among dermatologists plays a key role in BU case detection. So, what about in other countries where a case of BU has never been diagnosed and there is no awareness of the disease among the population or, more importantly, among health professionals? This article will <span class="hlt">revisit</span> BU, reviewing clinical features as well as the most recent epidemiological and scientific findings of the disease, to raise awareness of BU among dermatologists worldwide. PMID:26332541</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4260746','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4260746"><span id="translatedtitle"><span class="hlt">Revisiting</span> caspases in sepsis</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Aziz, M; Jacob, A; Wang, P</p> <p>2014-01-01</p> <p>Sepsis is a life-threatening illness that occurs due to an abnormal host immune network which extends through the initial widespread and overwhelming inflammation, and culminates at the late stage of immunosupression. Recently, interest has been shifted toward therapies aimed at reversing the accompanying periods of immune suppression. Studies in experimental animals and critically ill patients have demonstrated that increased apoptosis of lymphoid organs and some parenchymal tissues contributes to this immune suppression, anergy and organ dysfunction. Immediate to the discoveries of the intracellular proteases, caspases for the induction of apoptosis and inflammation, and their striking roles in sepsis have been focused elaborately in a number of original and review articles. Here we <span class="hlt">revisited</span> the different aspects of caspases in terms of apoptosis, pyroptosis, necroptosis and inflammation and focused their links in sepsis by reviewing several recent findings. In addition, we have documented striking perspectives which not only rewrite the pathophysiology, but also modernize our understanding for developing novel therapeutics against sepsis. PMID:25412304</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=chemical+AND+reaction&pg=5&id=EJ1016988','ERIC'); return false;" href="http://eric.ed.gov/?q=chemical+AND+reaction&pg=5&id=EJ1016988"><span id="translatedtitle">The "Mushroom Cloud" Demonstration <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Panzarasa, Guido; Sparnacci, Katia</p> <p>2013-01-01</p> <p>A <span class="hlt">revisitation</span> of the classical "mushroom cloud" demonstration is described. Instead of aniline and benzoyl peroxide, the proposed reaction involves household chemicals such as alpha-pinene (turpentine oil) and trichloroisocyanuric acid ("Trichlor") giving an impressive demonstration of oxidation and combustion reactions that…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1893087','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1893087"><span id="translatedtitle">Cultural Warping of Childbirth, <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Budin, Wendy C.</p> <p>2007-01-01</p> <p>In this column, the editor of The Journal of Perinatal Education <span class="hlt">revisits</span> Doris Haire's classic 1972 article, “The Cultural Warping of Childbirth,” and describes the birth culture of today. The editor also describes the contents of this issue, which offer a broad range of resources, research, and inspiration for childbirth educators in their efforts to promote normal birth.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=oil&pg=3&id=EJ1016988','ERIC'); return false;" href="http://eric.ed.gov/?q=oil&pg=3&id=EJ1016988"><span id="translatedtitle">The "Mushroom Cloud" Demonstration <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Panzarasa, Guido; Sparnacci, Katia</p> <p>2013-01-01</p> <p>A <span class="hlt">revisitation</span> of the classical "mushroom cloud" demonstration is described. Instead of aniline and benzoyl peroxide, the proposed reaction involves household chemicals such as alpha-pinene (turpentine oil) and trichloroisocyanuric acid ("Trichlor") giving an impressive demonstration of oxidation and combustion reactions that</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25384602','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25384602"><span id="translatedtitle">Oxidative phosphorylation <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Nath, Sunil; Villadsen, John</p> <p>2015-03-01</p> <p>The fundamentals of oxidative phosphorylation and photophosphorylation are <span class="hlt">revisited</span>. New experimental data on the involvement of succinate and malate anions respectively in oxidative phosphorylation and photophosphorylation are presented. These new data offer a novel molecular mechanistic explanation for the energy coupling and ATP synthesis carried out in mitochondria and chloroplast thylakoids. The mechanism does not suffer from the flaws in Mitchell's chemiosmotic theory that have been pointed out in many studies since its first appearance 50 years ago, when it was hailed as a ground-breaking mechanistic explanation of what is perhaps the most important process in cellular energetics. The new findings fit very well with the predictions of Nath's torsional mechanism of energy transduction and ATP synthesis. It is argued that this mechanism, based on at least 15 years of experimental and theoretical work by Sunil Nath, constitutes a fundamentally different theory of the energy conversion process that eliminates all the inconsistencies in Mitchell's chemiosmotic theory pointed out by other authors. It is concluded that the energy-transducing complexes in oxidative phosphorylation and photosynthesis are proton-dicarboxylic acid anion cotransporters and not simply electrogenic proton translocators. These results necessitate revision of previous theories of biological energy transduction, coupling, and ATP synthesis. The novel molecular mechanism is extended to cover ATP synthesis in prokaryotes, in particular to alkaliphilic and haloalkaliphilic bacteria, essentially making it a complete theory addressing mechanistic, kinetic, and thermodynamic details. Finally, based on the new interpretation of oxidative phosphorylation, quantitative values for the P/O ratio, the amount of ATP generated per redox package of the reduced substrates, are calculated and compared with experimental values for fermentation on different substrates. It is our hope that the presentation of oxidative phosphorylation and photophosphorylation from a wholly new perspective will rekindle scientific discussion of a key process in bioenergetics and catalyze new avenues of research in a truly interdisciplinary field. PMID:25384602</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li class="active"><span>13</span></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_13 --> <div id="page_14" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li class="active"><span>14</span></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="261"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26188384','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26188384"><span id="translatedtitle"><span class="hlt">Re-visiting</span> the electrophysiology of language.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Obleser, Jonas</p> <p>2015-09-01</p> <p>This editorial accompanies a special issue of Brain and Language <span class="hlt">re-visiting</span> old themes and new leads in the electrophysiology of language. The event-related potential (ERP) as a series of characteristic deflections ("components") over time and their distribution on the scalp has been exploited by speech and language researchers over decades to find support for diverse psycholinguistic <span class="hlt">models</span>. Fortunately, methodological and statistical advances have allowed human neuroscience to move beyond some of the limitations imposed when looking at the ERP only. Most importantly, we currently witness a refined and refreshed look at "event-related" (in the literal sense) brain activity that relates itself more closely to the actual neurobiology of speech and language processes. It is this imminent change in handling and interpreting electrophysiological data of speech and language experiments that this special issue intends to capture. PMID:26188384</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/27002506','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/27002506"><span id="translatedtitle"><span class="hlt">Revisiting</span> dosing regimen using PK/PD <span class="hlt">modeling</span>: the <span class="hlt">MODEL</span>1 phase I/II trial of docetaxel plus epirubicin in metastatic breast cancer patients.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hénin, Emilie; Meille, Christophe; Barbolosi, Dominique; You, Benoit; Guitton, Jérôme; Iliadis, Athanassios; Freyer, Gilles</p> <p>2016-04-01</p> <p>The <span class="hlt">MODEL</span>1 trial is the first <span class="hlt">model</span>-driven phase I/II dose-escalation study of densified docetaxel plus epirubicin administration in metastatic breast cancer patients, a regimen previously known to induce unacceptable life-threatening toxicities. The primary objective was to determine the maximum tolerated dose of this densified regimen. Study of the efficacy was a secondary objective. Her2-negative, hormone-resistant metastatic breast cancer patients were treated with escalating doses of docetaxel plus epirubicin every 2 weeks for six cycles with granulocyte colony stimulating factor support. A total of 16 patients were treated with total doses ranging from 85 to 110 mg of docetaxel plus epirubicin per cycle. Dose escalation was controlled by a non-hematological toxicity <span class="hlt">model</span>. Dose densification was guided by a <span class="hlt">model</span> of neutrophil kinetics, able to optimize docetaxel plus epirubicin dosing with respect to pre-defined acceptable levels of hematological toxicity while ensuring maximal efficacy. The densified treatment was safe since hematological toxicity was much lower compared to previous findings, and other adverse events were consistent with those observed with this regimen. The maximal tolerated dose was 100 mg given every 2 weeks. The response rate was 45 %; median progression-free survival was 10.4 months, whereas 54.6 months of median overall survival was achieved. The optimized docetaxel plus epirubicin dosing regimen led to fewer toxicities associated with higher efficacy as compared with standard or empirical densified dosing. This study suggests that <span class="hlt">model</span>-driven dosage adjustment can lead to improved efficacy-toxicity balance in patients with cancer when several anticancer drugs are combined. PMID:27002506</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/7599328','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/7599328"><span id="translatedtitle">HIV and tuberculosis: noncompliance <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Anastasio, C J</p> <p>1995-01-01</p> <p><span class="hlt">Revisiting</span> the stereotype of the noncompliant patient can transcend the frustrating or resentful feelings nurses may experience when caring for patients with HIV and tuberculosis. This reevaluation also can lend itself to developing mutually participative nurse-patient relationships. The author suggests relationship goals, assessment parameters, and intervention strategies--including a directly observed therapy (DOT) contract. These actions support a commitment to empowering both the nurse and the patient in their relationship in the TB treatment process. PMID:7599328</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Baumrind%2c+diana&pg=2&id=EJ544146','ERIC'); return false;" href="http://eric.ed.gov/?q=Baumrind%2c+diana&pg=2&id=EJ544146"><span id="translatedtitle">The Discipline Controversy <span class="hlt">Revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Baumrind, Diana</p> <p>1996-01-01</p> <p>Found that neither the authoritative <span class="hlt">model</span> nor the liberal (permissive) <span class="hlt">model</span> offers parents an efficacious <span class="hlt">model</span> of childrearing. Each polarized <span class="hlt">model</span> contains an element of truth, but each demonizes the other. Argues that within a responsive and supportive parent-child relationship, prudent use of punishment is a necessary tool in discipline.…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1035083','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1035083"><span id="translatedtitle">Pair Production Constraints on Superluminal Neutrinos <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Brodsky, Stanley J.; Gardner, Susan; /Kentucky U.</p> <p>2012-02-16</p> <p>We <span class="hlt">revisit</span> the pair creation constraint on superluminal neutrinos considered by Cohen and Glashow in order to clarify which types of superluminal <span class="hlt">models</span> are constrained. We show that a <span class="hlt">model</span> in which the superluminal neutrino is effectively light-like can evade the Cohen-Glashow constraint. In summary, any <span class="hlt">model</span> for which the CG pair production process operates is excluded because such timelike neutrinos would not be detected by OPERA or other experiments. However, a superluminal neutrino which is effectively lightlike with fixed p{sup 2} can evade the Cohen-Glashow constraint because of energy-momentum conservation. The coincidence involved in explaining the SN1987A constraint certainly makes such a picture improbable - but it is still intrinsically possible. The lightlike <span class="hlt">model</span> is appealing in that it does not violate Lorentz symmetry in particle interactions, although one would expect Hughes-Drever tests to turn up a violation eventually. Other evasions of the CG constraints are also possible; perhaps, e.g., the neutrino takes a 'short cut' through extra dimensions or suffers anomalous acceleration in matter. Irrespective of the OPERA result, Lorentz-violating interactions remain possible, and ongoing experimental investigation of such possibilities should continue.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/16835512','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/16835512"><span id="translatedtitle">Doppler ultrasound--basics <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Eagle, Mary</p> <p></p> <p>Palpation of pedal pulses alone is known to be an unreliable indicator for the presence of arterial disease. Using portable Doppler ultrasound to measure the resting ankle brachial pressure index is superior to palpation of peripheral pulses as an assessment of the adequacy pf the arterial supply in the lower limb. <span class="hlt">Revisiting</span> basics, this article aims to aid the clinician to understand and perform hand-held Doppler ultrasound effectively while involving the client or patient in the process. The author describes the basics of Doppler ultrasound, how to select correct equipment for the process, and interpretation of results to further enhance clinicians' knowledge. PMID:16835512</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=drummond&pg=2&id=EJ464147','ERIC'); return false;" href="http://eric.ed.gov/?q=drummond&pg=2&id=EJ464147"><span id="translatedtitle">Acknowledgment Tokens and Speakership Incipiency <span class="hlt">Revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Zimmerman, Don H.</p> <p>1993-01-01</p> <p>Drummond and Hopper's article in this issue, "Back Channels <span class="hlt">Revisited</span>," is argued to have decontextualized Jefferson's acknowledgement token phenomenon. The need for careful coding protocols for research on conversational practices is discussed. (eight references) (LB)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012LPICo1667.6419B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012LPICo1667.6419B"><span id="translatedtitle"><span class="hlt">Revisiting</span> the NEAR-Shoemaker landing site.</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Barnouin, O. S.; Gaskell, R. W.; Ernst, C. M.</p> <p>2012-05-01</p> <p>We use new high-resolution topography from imaging, and improvements in the Near laser rangefinder data to <span class="hlt">revisit</span> and re-evaluate current interpretations of the geology observed in the final images collected by the NEAR-Shoemaker spacecraft.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/935310','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/935310"><span id="translatedtitle">SLIM--An Early Work <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Chao, Alex; /SLAC</p> <p>2008-07-25</p> <p>An early, but at the time illuminating, piece of work on how to deal with a general, linearly coupled accelerator lattice is <span class="hlt">revisited</span>. This work is based on the SLIM formalism developed in 1979-1981.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=social+AND+support+AND+system&pg=7&id=EJ609780','ERIC'); return false;" href="http://eric.ed.gov/?q=social+AND+support+AND+system&pg=7&id=EJ609780"><span id="translatedtitle"><span class="hlt">Revisiting</span> "Rethinking Early Intervention".</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Dunst, Carl J.</p> <p>2000-01-01</p> <p>Major components of the social support and social systems approach to early intervention are reviewed, reflections are presented, and the future use of the <span class="hlt">model</span> are discussed. The paper concludes with an overview of a "third generation" <span class="hlt">model</span> integrating new evidence for studying and practicing family systems intervention. (Contains extensive…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003AGUFM.H12D1013L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003AGUFM.H12D1013L"><span id="translatedtitle">MOPEX Workshop Results <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Leavesley, G. H.</p> <p>2003-12-01</p> <p>A complementary program to the Prediction in Ungauged Basins (PUB) program is the <span class="hlt">Model</span> Parameter Estimation Experiment (MOPEX). The primary goal of MOPEX is to develop techniques for the a priori estimation of parameters in land surface parameterization schemes in atmospheric <span class="hlt">models</span> and in hydrologic <span class="hlt">models</span>. A recent MOPEX workshop evaluated the use of a priori estimated parameters in eight hydrologic <span class="hlt">models</span>. A data set of mean areal precipitation, temperature, and potential evapotranspiration was provided for each of 12 basins located predominantly in the southeastern United States. While workshop results provided valuable insight to some problems in a priori parameter estimation within and among <span class="hlt">models</span>, additional questions remain. Using additional data sets for the 12 basins, alternative parameter estimation techniques are being evaluated to compare the use of distributed values of precipitation and temperature to the use of mean areal values in the original study. Also, the magnitudes of the uncertainty in streamflow prediction resulting from errors in the meteorological variables and their distribution are being compared with the magnitudes of uncertainty associated with errors in parameter estimates of basin physical characteristics. The U.S Geological Survey's distributed-parameter watershed <span class="hlt">model</span> PRMS was one of the eight <span class="hlt">models</span> used in the MOPEX workshop and is the <span class="hlt">model</span> being used to conduct these further studies. Results of this investigation are presented.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25752537','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25752537"><span id="translatedtitle">Natural dispersion <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Johansen, Øistein; Reed, Mark; Bodsberg, Nils Rune</p> <p>2015-04-15</p> <p>This paper presents a new semi-empirical <span class="hlt">model</span> for oil droplet size distributions generated by single breaking wave events. Empirical data was obtained from laboratory experiments with different crude oils at different stages of weathering. The paper starts with a review of the most commonly used <span class="hlt">model</span> for natural dispersion, which is followed by a presentation of the laboratory study on oil droplet size distributions formed by breaking waves conducted by SINTEF on behalf of the NOAA/UNH Coastal Response Research Center. The next section presents the theoretical and empirical foundation for the new <span class="hlt">model</span>. The <span class="hlt">model</span> is based on dimensional analysis and contains two non-dimensional groups; the Weber and Reynolds number. The <span class="hlt">model</span> was validated with data from a full scale experimental oil spill conducted in the Haltenbanken area offshore Norway in July 1982, as described in the last section of the paper. PMID:25752537</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=start+AND+school+AND+earlier&pg=4&id=EJ900928','ERIC'); return false;" href="http://eric.ed.gov/?q=start+AND+school+AND+earlier&pg=4&id=EJ900928"><span id="translatedtitle">Framing the Future: <span class="hlt">Revisiting</span> the Place of Educational Expectations in Status Attainment</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bozick, Robert; Alexander, Karl; Entwisle, Doris; Dauber, Susan; Kerr, Kerri</p> <p>2010-01-01</p> <p>This study <span class="hlt">revisits</span> the Wisconsin <span class="hlt">model</span> of status attainment from a life course developmental perspective. Fixed-effects regression analyses lend strong support to the Wisconsin framework's core proposition that academic performance and significant others' influence shape educational expectations. However, investigating the process of expectation…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=18&id=EJ1004745','ERIC'); return false;" href="http://eric.ed.gov/?q=18&id=EJ1004745"><span id="translatedtitle">Sunday School <span class="hlt">Revisited</span>: An Alternative to Christian Education of the Church Today?</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Song, Nam Soon</p> <p>2013-01-01</p> <p>This article attempts to demonstrate similarities between the socioeconomic, cultural, and religious contexts of 18th-century England and 21st-century Canada. <span class="hlt">Revisiting</span> the Sunday School movement in 18th-century England provides insights for the development of renewed Sunday School <span class="hlt">models</span> in the current Canadian context of transnational…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=20010044996&hterms=love&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D70%26Ntt%3Dlove','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=20010044996&hterms=love&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D70%26Ntt%3Dlove"><span id="translatedtitle">Atmospheric Entry Heating of Micrometeorites <span class="hlt">Revisited</span>: Higher Temperatures and Potential Biases</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Love, S.; Alexander, C. M. OD.</p> <p>2001-01-01</p> <p>The atmospheric entry heating <span class="hlt">model</span> of Love and Brownlee appears to have overestimated evaporation rates by as much as two orders of magnitude. Here we <span class="hlt">revisit</span> the issue of atmospheric entry heating, using a revised prescription for evaporation rates. Additional information is contained in the original extended abstract.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/821220','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/821220"><span id="translatedtitle">Melt fracture <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Greenberg, J. M.</p> <p>2003-07-16</p> <p>In a previous paper the author and Demay advanced a <span class="hlt">model</span> to explain the melt fracture instability observed when molten linear polymer melts are extruded in a capillary rheometer operating under the controlled condition that the inlet flow rate was held constant. The <span class="hlt">model</span> postulated that the melts were a slightly compressible viscous fluid and allowed for slipping of the melt at the wall. The novel feature of that <span class="hlt">model</span> was the use of an empirical switch law which governed the amount of wall slip. The <span class="hlt">model</span> successfully accounted for the oscillatory behavior of the exit flow rate, typically referred to as the melt fracture instability, but did not simultaneously yield the fine scale spatial oscillations in the melt typically referred to as shark skin. In this note a new <span class="hlt">model</span> is advanced which simultaneously explains the melt fracture instability and shark skin phenomena. The <span class="hlt">model</span> postulates that the polymer is a slightly compressible linearly viscous fluid but assumes no slip boundary conditions at the capillary wall. In simple shear the shear stress {tau}and strain rate d are assumed to be related by d = F{tau} where F ranges between F{sub 2} and F{sub 1} > F{sub 2}. A strain rate dependent yield function is introduced and this function governs whether F evolves towards F{sub 2} or F{sub 1}. This <span class="hlt">model</span> accounts for the empirical observation that at high shears polymers align and slide more easily than at low shears and explains both the melt fracture and shark skin phenomena.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25003817','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25003817"><span id="translatedtitle">Granger causality <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Friston, Karl J; Bastos, André M; Oswal, Ashwini; van Wijk, Bernadette; Richter, Craig; Litvak, Vladimir</p> <p>2014-11-01</p> <p>This technical paper offers a critical re-evaluation of (spectral) Granger causality measures in the analysis of biological timeseries. Using realistic (neural mass) <span class="hlt">models</span> of coupled neuronal dynamics, we evaluate the robustness of parametric and nonparametric Granger causality. Starting from a broad class of generative (state-space) <span class="hlt">models</span> of neuronal dynamics, we show how their Volterra kernels prescribe the second-order statistics of their response to random fluctuations; characterised in terms of cross-spectral density, cross-covariance, autoregressive coefficients and directed transfer functions. These quantities in turn specify Granger causality - providing a direct (analytic) link between the parameters of a generative <span class="hlt">model</span> and the expected Granger causality. We use this link to show that Granger causality measures based upon autoregressive <span class="hlt">models</span> can become unreliable when the underlying dynamics is dominated by slow (unstable) modes - as quantified by the principal Lyapunov exponent. However, nonparametric measures based on causal spectral factors are robust to dynamical instability. We then demonstrate how both parametric and nonparametric spectral causality measures can become unreliable in the presence of measurement noise. Finally, we show that this problem can be finessed by deriving spectral causality measures from Volterra kernels, estimated using dynamic causal <span class="hlt">modelling</span>. PMID:25003817</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4176655','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4176655"><span id="translatedtitle">Granger causality <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Friston, Karl J.; Bastos, André M.; Oswal, Ashwini; van Wijk, Bernadette; Richter, Craig; Litvak, Vladimir</p> <p>2014-01-01</p> <p>This technical paper offers a critical re-evaluation of (spectral) Granger causality measures in the analysis of biological timeseries. Using realistic (neural mass) <span class="hlt">models</span> of coupled neuronal dynamics, we evaluate the robustness of parametric and nonparametric Granger causality. Starting from a broad class of generative (state-space) <span class="hlt">models</span> of neuronal dynamics, we show how their Volterra kernels prescribe the second-order statistics of their response to random fluctuations; characterised in terms of cross-spectral density, cross-covariance, autoregressive coefficients and directed transfer functions. These quantities in turn specify Granger causality — providing a direct (analytic) link between the parameters of a generative <span class="hlt">model</span> and the expected Granger causality. We use this link to show that Granger causality measures based upon autoregressive <span class="hlt">models</span> can become unreliable when the underlying dynamics is dominated by slow (unstable) modes — as quantified by the principal Lyapunov exponent. However, nonparametric measures based on causal spectral factors are robust to dynamical instability. We then demonstrate how both parametric and nonparametric spectral causality measures can become unreliable in the presence of measurement noise. Finally, we show that this problem can be finessed by deriving spectral causality measures from Volterra kernels, estimated using dynamic causal <span class="hlt">modelling</span>. PMID:25003817</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26618655','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26618655"><span id="translatedtitle">Cleckley's psychopaths: <span class="hlt">Revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Crego, Cristina; Widiger, Thomas A</p> <p>2016-01-01</p> <p>The most influential figure in the study of psychopathy is Hervey Cleckley, the author of the widely cited text, "The Mask of Sanity" (Cleckley, 1941, 1955). Researchers often refer to Cleckley when disputing what should belong within a conceptualization or assessment of psychopathy, at times disagreeing as to what Cleckley meant or intended. Cleckley though included within his text 15 detailed case studies of prototypic psychopaths. The current study was the first to provide systematic ratings of these 15 cases, including ratings with respect to (a) the 16 Cleckley criteria (e.g., anxiousness and inadequately motivated antisocial behavior), (b) 33 additional traits included within or considered for more recently developed measures and <span class="hlt">models</span> of psychopathy (e.g., boldness, fearlessness, disobliged, cruelty, and aggression), and (c) 30 traits of the 5-factor <span class="hlt">model</span> of general personality. The results are discussed with respect to implications for both historic and current <span class="hlt">models</span> of psychopathy. (PsycINFO Database Record PMID:26618655</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015PhRvD..91l3532H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015PhRvD..91l3532H"><span id="translatedtitle">Lyth bound <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Huang, Qing-Guo</p> <p>2015-06-01</p> <p>Imposing that the excursion distance of the inflaton in field space during inflation be less than the Planck scale, we derive an upper bound on the tensor-to-scalar ratio at the cosmic microwave background scales, i.e., r*,max , in the general canonical single-field slow-roll inflation <span class="hlt">model</span>, in particular, the <span class="hlt">model</span> with non-negligible running of the spectral index αs and/or the running of running βs. We find that r*,max≃7 ×10-4 for ns=0.9645 without running and running of running, and r*,max is significantly relaxed to the order of O (10-2˜10-1) in the inflation <span class="hlt">model</span> with αs and/or βs˜+O (10-2) which are marginally preferred by the Planck 2015 data.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li class="active"><span>14</span></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_14 --> <div id="page_15" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li class="active"><span>15</span></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="281"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015PhLB..744..352G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015PhLB..744..352G"><span id="translatedtitle">Charge symmetry breaking in Λ hypernuclei <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Gal, Avraham</p> <p>2015-05-01</p> <p>The large charge symmetry breaking (CSB) implied by the Λ binding energy difference Δ BΛ4 (0g.s.+) ≡BΛ (He4Λ) -BΛ (H4Λ) = 0.35 ± 0.06 MeV of the A = 4 mirror hypernuclei ground states, determined from emulsion studies, has defied theoretical attempts to reproduce it in terms of CSB in hyperon masses and in hyperon-nucleon interactions, including one pion exchange arising from Λ-Σ0 mixing. Using a schematic strong-interaction ΛN ↔ ΣN coupling <span class="hlt">model</span> developed by Akaishi and collaborators for s-shell Λ hypernuclei, we <span class="hlt">revisit</span> the evaluation of CSB in the A = 4 Λ hypernuclei and extend it to p-shell mirror Λ hypernuclei. The <span class="hlt">model</span> yields values of Δ BΛ4 (0g.s.+) ∼ 0.25 MeV. Smaller size and mostly negative p-shell binding energy differences are calculated for the A = 7- 10 mirror hypernuclei, in rough agreement with the few available data. CSB is found to reduce by almost 30 keV the 110 keV B10Λ g.s. doublet splitting anticipated from the hyperon-nucleon strong-interaction spin dependence, thereby explaining the persistent experimental failure to observe the 2exc- → 1g.s.- γ-ray transition.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22373661','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22373661"><span id="translatedtitle">No-scale ripple inflation <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Li, Tianjun; Li, Zhijin; Nanopoulos, Dimitri V. E-mail: lizhijin@physics.tamu.edu</p> <p>2014-04-01</p> <p>We <span class="hlt">revisit</span> the no-scale ripple inflation <span class="hlt">model</span>, where no-scale supergravity is modified by an additional term for the inflaton field in the Kähler potential. This term not only breaks one SU(N,1) symmetry explicitly, but also plays an important role for inflation. We generalize the superpotential in the no-scale ripple inflation <span class="hlt">model</span> slightly. There exists a discrete Z{sub 2} symmetry/parity in the scalar potential in general, which can be preserved or violated by the non-canonical nomalized inflaton kinetic term. Thus, there are three inflation paths: one parity invariant path, and the left and right paths for parity violating scenario. We show that the inflations along the parity invariant path and right path are consistent with the Planck results. However, the gavitino mass for the parity invariant path is so large that the inflation results will be invalid if we consider the inflaton supersymmetry breaking soft mass term. Thus, only the inflation along the right path gives the correct and consistent results. Notably, the tensor-to-scalar ratio in such case can be large, with a value around 0.05, which may be probed by the future Planck experiment.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016JCAP...03..008E','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016JCAP...03..008E"><span id="translatedtitle">Post-inflationary gravitino production <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ellis, John; Garcia, Marcos A. G.; Nanopoulos, Dimitri V.; Olive, Keith A.; Peloso, Marco</p> <p>2016-03-01</p> <p>We <span class="hlt">revisit</span> gravitino production following inflation. As a first step, we review the standard calculation of gravitino production in the thermal plasma formed at the end of post-inflationary reheating when the inflaton has completely decayed. Next we consider gravitino production prior to the completion of reheating, assuming that the inflaton decay products thermalize instantaneously while they are still dilute. We then argue that instantaneous thermalization is in general a good approximation, and also show that the contribution of non-thermal gravitino production via the collisions of inflaton decay products prior to thermalization is relatively small. Our final estimate of the gravitino-to-entropy ratio is approximated well by a standard calculation of gravitino production in the post-inflationary thermal plasma assuming total instantaneous decay and thermalization at a time t simeq 1.2/Γphi. Finally, in light of our calculations, we consider potential implications of upper limits on the gravitino abundance for <span class="hlt">models</span> of inflation, with particular attention to scenarios for inflaton decays in supersymmetric Starobinsky-like <span class="hlt">models</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1999DSRII..46...33E','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1999DSRII..46...33E"><span id="translatedtitle">Neutral density <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Eden, Carsten; Willebrand, Jürgen</p> <p>1999-01-01</p> <p>The possibilities of defining and computing an approximately neutral density variable are reexamined in this paper. There are three desirable properties that a neutral density variable should possess. Firstly, the isosurfaces of this variable should coincide with (approximately) neutral surfaces. This would facilitate the analysis of hydrographic data on the most appropriate mixing and spreading surfaces. Secondly, the horizontal gradients of the neutral density should agree with the gradients of the in situ density, and thirdly the vertical gradient of the neutral density variable should be proportional to the static stability of the water column. A density variable that approximates the latter two properties can be used in ocean circulation <span class="hlt">models</span> based on layer coordinates, and would reduce substantial errors in present isopycnal <span class="hlt">models</span> due to the use of a potential density variable. No variable can possess all the three properties simultaneously. The variable γn introduced by Jackett and McDougall (1997, J. Phys. Oceanogr. 27, 237-263) satisfies the first of the properties exactly but is not designed for the use in <span class="hlt">models</span>. Based on climatological data in the North Atlantic, an alternative neutral density variable ν˜(S, Θ) is defined, which is shown to approximate the two gradient criteria much better than any potential density. We suggest that this neutral density variable may be useful in isopycnal ocean <span class="hlt">models</span> as an alternative to potential density, since it could significantly reduce errors in thermal wind relation and vertical stability.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25953388','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25953388"><span id="translatedtitle">Games among relatives <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Allen, Benjamin; Nowak, Martin A</p> <p>2015-08-01</p> <p>We present a simple <span class="hlt">model</span> for the evolution of social behavior in family-structured, finite sized populations. Interactions are represented as evolutionary games describing frequency-dependent selection. Individuals interact more frequently with siblings than with members of the general population, as quantified by an assortment parameter r, which can be interpreted as "relatedness". Other <span class="hlt">models</span>, mostly of spatially structured populations, have shown that assortment can promote the evolution of cooperation by facilitating interaction between cooperators, but this effect depends on the details of the evolutionary process. For our <span class="hlt">model</span>, we find that sibling assortment promotes cooperation in stringent social dilemmas such as the Prisoner's Dilemma, but not necessarily in other situations. These results are obtained through straightforward calculations of changes in gene frequency. We also analyze our <span class="hlt">model</span> using inclusive fitness. We find that the quantity of inclusive fitness does not exist for general games. For special games, where inclusive fitness exists, it provides less information than the straightforward analysis. PMID:25953388</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=corporate+AND+governance&pg=4&id=EJ624688','ERIC'); return false;" href="http://eric.ed.gov/?q=corporate+AND+governance&pg=4&id=EJ624688"><span id="translatedtitle">Policy Governance <span class="hlt">Revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Price, William J.</p> <p>2001-01-01</p> <p>An administrator trainer/former superintendent's experience suggests that corporate governance <span class="hlt">models</span> don't fit the reality of school governance in many districts. Elected board members define their roles differently than their business counterparts and derive little or no monetary benefit from public service. The "new breed" resemble political…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22373453','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22373453"><span id="translatedtitle">Emergent cosmology <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Bag, Satadru; Sahni, Varun; Shtanov, Yuri; Unnikrishnan, Sanil E-mail: varun@iucaa.ernet.in E-mail: sanil@lnmiit.ac.in</p> <p>2014-07-01</p> <p>We explore the possibility of emergent cosmology using the effective potential formalism. We discover new <span class="hlt">models</span> of emergent cosmology which satisfy the constraints posed by the cosmic microwave background (CMB). We demonstrate that, within the framework of modified gravity, the emergent scenario can arise in a universe which is spatially open/closed. By contrast, in general relativity (GR) emergent cosmology arises from a spatially closed past-eternal Einstein Static Universe (ESU). In GR the ESU is unstable, which creates fine tuning problems for emergent cosmology. However, modified gravity <span class="hlt">models</span> including Braneworld <span class="hlt">models</span>, Loop Quantum Cosmology (LQC) and Asymptotically Free Gravity result in a stable ESU. Consequently, in these <span class="hlt">models</span> emergent cosmology arises from a larger class of initial conditions including those in which the universe eternally oscillates about the ESU fixed point. We demonstrate that such an oscillating universe is necessarily accompanied by graviton production. For a large region in parameter space graviton production is enhanced through a parametric resonance, casting serious doubts as to whether this emergent scenario can be past-eternal.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/21210283','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/21210283"><span id="translatedtitle">Pion scattering <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Ruiz-Altaba, M.; Lucio, J. L.; Napsuciale, M.</p> <p>1999-10-25</p> <p>Chiral Ward identities lead to consistent accounting for the {sigma}'s width in the linear sigma <span class="hlt">model</span>'s Feynman rules. Reanalysis of pion scattering data at threshold imply a mass for the {sigma} of 600{sub -100}{sup +200} MeV.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Corporate+AND+governance&pg=4&id=EJ624688','ERIC'); return false;" href="http://eric.ed.gov/?q=Corporate+AND+governance&pg=4&id=EJ624688"><span id="translatedtitle">Policy Governance <span class="hlt">Revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Price, William J.</p> <p>2001-01-01</p> <p>An administrator trainer/former superintendent's experience suggests that corporate governance <span class="hlt">models</span> don't fit the reality of school governance in many districts. Elected board members define their roles differently than their business counterparts and derive little or no monetary benefit from public service. The "new breed" resemble political</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19730005656','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19730005656"><span id="translatedtitle">The air afterglow <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Kaufman, F.</p> <p>1972-01-01</p> <p>The air afterglow, 0 + NO2 chemiluminescence, is discussed in terms of fluorescence, photodissociation, and quantum theoretical calculations of NO2. The experimental results presented include pressure dependence, M-dependence, spectral dependence of P and M, temperature dependence, and infrared measurements. The NO2 energy transfer <span class="hlt">model</span> is also discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ1083712.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ1083712.pdf"><span id="translatedtitle"><span class="hlt">Revisiting</span> "Beyond Instructional Design"</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Sims, Rod</p> <p>2015-01-01</p> <p>Since the article "Beyond Instructional Design: Making Learning Design a Reality" (Sims, 2006) was published, much has changed in the opportunities we have for learning, and Professor Rod Sims's thinking has evolved. In this article, Professor Rod Sims reflects upon his original article, and he offers an evolved <span class="hlt">model</span> of learning design,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014cosp...40E2101M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014cosp...40E2101M"><span id="translatedtitle"><span class="hlt">Revisiting</span> and updating the Mars International Reference Atmosphere MIRA</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Millour, Ehouarn; Forget, Francois; Montabone, Luca</p> <p></p> <p>Since the elaboration of the COSPAR Mars International Reference Atmosphere (MIRA) in 1982, our knowledge of the Martian atmosphere and its main (CO2, dust, water) cycles has been greatly improved. This is firstly due to the recent continuous multi-annual observations gathered by instruments on board the Mars Global Surveyor, Mars Odyssey, Mars Express and Mars Reconnaissance Orbiter spacecrafts. The development of <span class="hlt">models</span> capable of matching these observations have also contributed to better understand the physical processes at work on Mars. At the COSPAR 2014 scientific assembly, we will address <span class="hlt">revisiting</span> MIRA and assess on possible ways of updating it to match our current knowledge of the Martian atmosphere.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JCAP...12..011M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JCAP...12..011M"><span id="translatedtitle">Dark matter relic density in scalar-tensor gravity <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Meehan, Michael T.; Whittingham, Ian B.</p> <p>2015-12-01</p> <p>We <span class="hlt">revisit</span> the calculation of dark matter relic abundances in scalar-tensor gravity using a generic form A(varphi*) = eβvarphi*2/2 for the coupling between the scalar field varphi* and the metric, for which detailed Big Bang Nucleosynthesis constraints are available. We find that BBN constraints restrict the modified expansion rate in these <span class="hlt">models</span> to be almost degenerate with the standard expansion history at the time of dark matter decoupling. In this case the maximum level of enhancement of the dark matter relic density was found to be a factor of ~ 3, several orders of magnitude below that found in previous investigations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2492820','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2492820"><span id="translatedtitle">Allostery and cooperativity <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Cui, Qiang; Karplus, Martin</p> <p>2008-01-01</p> <p>Although phenomenlogical <span class="hlt">models</span> that account for cooperativity in allosteric systems date back to the early and mid-60's (e.g., the KNF and MWC <span class="hlt">models</span>), there is resurgent interest in the topic due to the recent experimental and computational studies that attempted to reveal, at an atomistic level, how allostery actually works. In this review, using systems for which atomistic simulations have been carried out in our groups as examples, we describe the current understanding of allostery, how the mechanisms go beyond the classical MWC/Pauling-KNF descriptions, and point out that the “new view” of allostery, emphasizing “population shifts,” is, in fact, an “old view.” The presentation offers not only an up-to-date description of allostery from a theoretical/computational perspective, but also helps to resolve several outstanding issues concerning allostery. PMID:18560010</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=co&pg=5&id=EJ1084290','ERIC'); return false;" href="http://eric.ed.gov/?q=co&pg=5&id=EJ1084290"><span id="translatedtitle"><span class="hlt">Revisiting</span> Classroom Routines</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Wilson, Gloria Lodato</p> <p>2016-01-01</p> <p>Most co-teachers agree that there just isn't enough time for co-teachers to appropriately and effectively preplan every aspect of every activity in every lesson. This lack of time leads co-teachers to turn to <span class="hlt">models</span> that fail to maximize the benefits of a two-teacher classroom. Wilson suggests that if co-teachers use their limited planning time to…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015Ap%26SS.357...47C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015Ap%26SS.357...47C"><span id="translatedtitle">Twisted Crab fingers <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Carlqvist, Per</p> <p>2015-05-01</p> <p>Narrowband images of the Crab Nebula captured by the Hubble Space Telescope have earlier shown that the nebula does not only present a network of broad, bright filaments crossing the nebula but also numerous so-called fingers mostly pointing inwards. Using archival Hubble images we have in some detail studied the morphology of a great number of such fingers. This scrutiny has revealed that practically all the fingers are made up of filaments. Most of the larger fingers show overall shapes that are similar to either of the two letters V and Y. In many of these fingers it is also possible to see internal details. Interestingly, a number of the larger, Y-shaped fingers turn out to have a stem that consists of intertwined filaments. By contrast with this, the smaller fingers usually appear only as diffuse and sometimes incomplete pegs. In none of the smaller fingers is it possible to find any plain, internal structure. The observational results obtained are compared with the properties of a previously proposed <span class="hlt">model</span> of the fingers. The <span class="hlt">model</span> suggests that the fingers have evolved out of magnetized filaments. The evolution should lead to fingers with overall shapes that are similar to either a V or a Y, very much in agreement with the observations. In addition to this, the <span class="hlt">model</span> prescribes that the stems of the Y-shaped fingers should be made up of intertwined filaments. From all these points of agreement we conclude that the properties of the fingers observed lend strong support to the <span class="hlt">model</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22266005','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22266005"><span id="translatedtitle">Geometrical deuteron stripping <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Neoh, Y. S.; Yap, S. L.</p> <p>2014-03-05</p> <p>We investigate the reality of the idea of geometrical deuteron stripping originally envisioned by Serber. By taking into account of realistic deuteron wavefunction, nuclear density, and nucleon stopping mean free path, we are able to estimate inclusive deuteron stripping cross section for deuteron energy up to before pion production. Our semiclassical <span class="hlt">model</span> contains only one global parameter constant for all nuclei which can be approximated by Woods-Saxon or any other spherically symmetric density distribution.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4362092','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4362092"><span id="translatedtitle">Cube search, <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Zhang, Xuetao; Huang, Jie; Yigit-Elliott, Serap; Rosenholtz, Ruth</p> <p>2015-01-01</p> <p>Observers can quickly search among shaded cubes for one lit from a unique direction. However, replace the cubes with similar 2-D patterns that do not appear to have a 3-D shape, and search difficulty increases. These results have challenged <span class="hlt">models</span> of visual search and attention. We demonstrate that cube search displays differ from those with “equivalent” 2-D search items in terms of the informativeness of fairly low-level image statistics. This informativeness predicts peripheral discriminability of target-present from target-absent patches, which in turn predicts visual search performance, across a wide range of conditions. Comparing <span class="hlt">model</span> performance on a number of classic search tasks, cube search does not appear unexpectedly easy. Easy cube search, per se, does not provide evidence for preattentive computation of 3-D scene properties. However, search asymmetries derived from rotating and/or flipping the cube search displays cannot be explained by the information in our current set of image statistics. This may merely suggest a need to modify the <span class="hlt">model</span>'s set of 2-D image statistics. Alternatively, it may be difficult cube search that provides evidence for preattentive computation of 3-D scene properties. By attributing 2-D luminance variations to a shaded 3-D shape, 3-D scene understanding may slow search for 2-D features of the target. PMID:25780063</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25780063','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25780063"><span id="translatedtitle">Cube search, <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhang, Xuetao; Huang, Jie; Yigit-Elliott, Serap; Rosenholtz, Ruth</p> <p>2015-01-01</p> <p>Observers can quickly search among shaded cubes for one lit from a unique direction. However, replace the cubes with similar 2-D patterns that do not appear to have a 3-D shape, and search difficulty increases. These results have challenged <span class="hlt">models</span> of visual search and attention. We demonstrate that cube search displays differ from those with "equivalent" 2-D search items in terms of the informativeness of fairly low-level image statistics. This informativeness predicts peripheral discriminability of target-present from target-absent patches, which in turn predicts visual search performance, across a wide range of conditions. Comparing <span class="hlt">model</span> performance on a number of classic search tasks, cube search does not appear unexpectedly easy. Easy cube search, per se, does not provide evidence for preattentive computation of 3-D scene properties. However, search asymmetries derived from rotating and/or flipping the cube search displays cannot be explained by the information in our current set of image statistics. This may merely suggest a need to modify the <span class="hlt">model</span>'s set of 2-D image statistics. Alternatively, it may be difficult cube search that provides evidence for preattentive computation of 3-D scene properties. By attributing 2-D luminance variations to a shaded 3-D shape, 3-D scene understanding may slow search for 2-D features of the target. PMID:25780063</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19870009041','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19870009041"><span id="translatedtitle">MR Cygni <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Linnell, Albert P.; Kallrath, Josef</p> <p>1986-01-01</p> <p>New analysis tools and additional unanalyzed observations justify a reanalysis of MR Cygni. The reanalysis applied successively more restrictive physical <span class="hlt">models</span>, each with an optimization program. The final <span class="hlt">model</span> assigned separate first and second order limb darkening coefficients, from <span class="hlt">model</span> atmospheres, to individual grid points. Proper operation of the optimization procedure was tested on simulated observational data, produced by light synthesis with assigned system parameters, and modulated by simulated observational error. The iterative solution converged to a weakly-determined mass ratio of 0.75. Assuming the B3 primary component is on the main sequence, the HR diagram location of the secondary from the light ratio (ordinate) and adjusted T sub eff (abscissa) was calculated. The derived mass ratio, together with a main-sequence mass for the B3 component, implies a main-sequence secondary spectral type of B4. The photometrically-determined secondary radii agree with this spectral type, in marginal disagreement with the B7 type from the HR diagram analysis. The individual masses, derived from the radial velocity curve of the primary component, the photometrically-determined i, and alternative values of derived mass ratio are seriously discrepant with main sequence objects. The imputed physical status of the system is in disagreement with representations that have appeared in the literature.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li class="active"><span>15</span></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_15 --> <div id="page_16" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li class="active"><span>16</span></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="301"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006AGUFM.H54E..04K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006AGUFM.H54E..04K"><span id="translatedtitle">The Henry Problem <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Karasaki, K.; Oldenburg, C. M.; Maekawa, K.</p> <p>2006-12-01</p> <p>We have <span class="hlt">modeled</span> laboratory experiments of saltwater intrusion in a configuration resembling the so-called Henry Problem using TOUGH2/EOS7. The experiment differs from the Henry Problem in that the freshwater boundary condition is that of Dirichlet, a difference that is not expected to affect the overall results very much. The simulation matched the saltwater wedge profile of the experiment, the main feature of which was the sharp interface (lack of dispersion) between the freshwater and saltwater. Prior solutions of the Henry Problem show a wide transition zone between freshwater and saltwater arising from the use of a large dispersion coefficient. Henry attributed the large dispersion to the effect of tidally induced motion. In our simulation, we imposed a time-varying sinusoidal boundary condition to see if a larger transition zone can be created without using a larger dispersion coefficient. However, for the parameters used we were not able to do so. It is still plausible that the wide transition zone observed at Biscayne Bay (and as <span class="hlt">modeled</span> in the Henry Problem) is caused by a particular formation heterogeneity and transient effects. Our analysis, based on a laboratory experiment and accompanying <span class="hlt">modeling</span>, suggests that dispersion is quite limited. Nonetheless, we question the validity of the use of a large dispersion coefficient where the groundwater velocity is very low, or where the flow is in the opposite direction of the concentration gradient. This work was supported by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/560648','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/560648"><span id="translatedtitle">Inductive electron heating <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Tuszewski, M.</p> <p>1997-05-01</p> <p>The induced rf magnetic fields of low-frequency inductively coupled plasmas are measured and <span class="hlt">modeled</span> [M. Tuszewski, Phys. Rev. Lett. {bold 77}, 1286 (1996)]. The fields penetrate deep into the discharges, in contrast with existing predictions of field decay within a thin skin layer. Fluid calculations suggest that the enhanced rf penetration is due to a reduction of the plasma conductivity by the induced magnetic fields. In this paper, new oxygen and argon data concerning rf power absorption are reported and a general description of inductive electron heating is suggested. {copyright} {ital 1997 American Institute of Physics.}</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016GReGr..48...76C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016GReGr..48...76C"><span id="translatedtitle">Axisymmetric multiwormholes <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Clément, Gérard</p> <p>2016-06-01</p> <p>The construction of stationary axisymmetric multiwormhole solutions to gravitating field theories admitting toroidal reductions to three-dimensional gravitating sigma <span class="hlt">models</span> is reviewed. We show that, as in the multi-black hole case, strut singularities always appear in this construction, except for very special configurations with an odd number of centers. We also review the analytical continuation of the multicenter solution across the n cuts associated with the wormhole mouths. The resulting Riemann manifold has 2^n sheets interconnected by 2^{n-1}n wormholes. We find that the maximally extended multicenter solution can never be asymptotically locally flat in all the Riemann sheets.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009EGUGA..1111315D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009EGUGA..1111315D"><span id="translatedtitle">Cenozoic Glacial History <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Deconto, R.; Pollard, D.; Wilson, P.; Pagani, M.</p> <p>2009-04-01</p> <p>Recent geological discoveries have shaken the long-standing view of Earth's Cenozoic glacial history, which traditionally calls for the first continental-scale glaciation of East Antarctica in the earliest Oligocene (~33.6 Ma), followed by the onset of major Northern Hemispheric glacial cycles in the late Pliocene about 30 million years later. For example, new evidence from Arctic and North Atlantic oceans suggests Northern Hemispheric sea ice and glaciers have existed intermittently through much of the Cenozoic, not just the last few million years. In terms of the early glacial history of Antarctica, it has recently been suggested that significant glacial ice might have formed at various times during the overall greenhouse warmth of the Cretaceous and Eocene, and when more permanent, major glaciation began in the earliest Oligocene, a proto-West Antarctic Ice Sheet (WAIS) might have grown in concert with the East Antarctic Ice Sheet, rather than forming much later in the Neogene as is usually assumed. These data hint at previously unconsidered ice accommodation during the Oligocene and Miocene that could help to explain the discrepancy between large variations in global ice volume implied by deep-sea-core records, and the much smaller amplitude variations predicted by numerical climate-ice sheet <span class="hlt">models</span> of East Antarctica alone. In the more recent Pliocene and Pleistocene, recent sedimentary drilling by ANDRILL has shown that the Antarctic ice shelves and WAIS have waxed and waned with far greater frequency than previously suspected. Here, we review these recent geological findings from the polar regions of both hemispheres, while considering them in the context of globally distributed proxy records from the deep sea and new <span class="hlt">model</span> results using the latest generation of coupled atmosphere-ocean-cryosphere-isotope <span class="hlt">models</span>. We offer a revised view of Earth's cryospheric evolution through the Cenozoic, and note important discrepancies between traditional interpretations of proxy ice volume records, based mainly on oxygen isotope and Mg/Ca records from the deep sea, and numerical <span class="hlt">models</span> simulations that consider the long-term evolution of Cenozoic paleogeography and atmospheric carbon dioxide.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/18304584','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/18304584"><span id="translatedtitle">An old paper <span class="hlt">revisited</span>: "a mathematical <span class="hlt">model</span> of carbohydrate energy metabolism. Interaction between glycolysis, the Krebs cycle and the H-transporting shuttles at varying ATPases load" by V.V. Dynnik, R. Heinrich and E.E. Sel'kov.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Nazaret, Christine; Mazat, Jean-Pierre</p> <p>2008-06-01</p> <p>We <span class="hlt">revisit</span> an old Russian paper by V.V. Dynnik, R. Heinrich and E.E. Sel'kov (1980a,b) describing: "A mathematical <span class="hlt">model</span> of carbohydrate energy metabolism. Interaction between glycolysis, the Krebs cycle and the H-transporting shuttles at varying ATPases load". We analyse the <span class="hlt">model</span> mathematically and calculate the control coefficients as a function of ATPase loads. We also evaluate the structure of the metabolic network in terms of elementary flux modes. We show how this <span class="hlt">model</span> can respond to an ATPase load as well as to the glucose supply. We also show how this simple <span class="hlt">model</span> can help in understanding the articulation between the major blocks of energetic metabolism, i.e. glycolysis, the Krebs cycle and the H-transporting shuttles. PMID:18304584</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/7102406','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/7102406"><span id="translatedtitle">Extended equal area criterion <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Xue, X.; Wehenkel, L.; Belhomme, R.; Rousseaux, P.; Pavella, M. ); Euxibie, E.; Heilbronn, B.; Lesigne, J.F. )</p> <p>1992-08-01</p> <p>This paper reports on a case study conducted on the EHV French power system in order to <span class="hlt">revisit</span> the extended equal area criterion and test its suitability as a fast transient stability indicator. The assumptions underlying the method are reexamined, causes liable to invalidate them are identified, and indices are devised to automatically circumvent them. The selection of candidate critical machines is also reconsidered and an augmented criterion is proposed. The various improvements are developed and tested on about 1000 stability scenarios, covering the entire 400-kV system; the severity of the scenarios, resulting from the combination of weakened both pre- and post-fault configurations, subjects the method to particularly stringent conditions. The obtained results show that the devised tools contribute to significantly reinforce its robustness and reliability.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014A%26A...567A..19Y','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014A%26A...567A..19Y"><span id="translatedtitle">The Fermi bubbles <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Yang, Rui-zhi; Aharonian, Felix; Crocker, Roland</p> <p>2014-07-01</p> <p>We analyze 60 months of all-sky data from the Fermi-LAT. The Fermi bubble structures discovered previously are clearly revealed by our analysis. With more data, hence better statistics, we can now divide each bubble into constant longitude slices to investigate their gross γ-ray spectral morphology. While the detailed spectral behavior of each slice derived in our analysis is somewhat dependent on the assumed background <span class="hlt">model</span>, we find, robustly, a relative deficit in the flux at low energies (i.e., hardening) toward the top of the south bubble. In neither bubble does the spectrum soften with longitude. The morphology of the Fermi bubbles is also revealed to be energy-dependent: at high energies they are more extended. We conclude from the gamma-ray spectrum at high latitudes that a low energy break in the parent cosmic ray population is required in both leptonic and hadronic <span class="hlt">models</span>. We briefly discuss possible leptonic and hadronic interpretations of this phenomenology.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007AIPC..922..661S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007AIPC..922..661S"><span id="translatedtitle">Multiscale Fluctuation Analysis <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Struzik, Zbigniew R.; Kiyono, Ken; Yamamoto, Yoshiharu</p> <p>2007-07-01</p> <p>Ubiquitous non-Gaussianity of the probability density of (time-series) fluctuations in many real world phenomena has been known and <span class="hlt">modelled</span> extensively in recent years. Similarly, the analysis of (multi)scaling properties of (fluctuations in) complex systems has become a standard way of addressing unknown complexity. Yet the combined analysis and <span class="hlt">modelling</span> of multiscale behaviour of probability density — multiscale PDF analysis — has only recently been proposed for the analysis of time series arising in complex systems, such as the cardiac neuro-regulatory system, financial markets or hydrodynamic turbulence. This relatively new technique has helped significantly to expand the previously obtained insights into the phenomena addressed. In particular, it has helped to identify a novel class of scale invariant behaviour of the multiscale PDF in healthy heart rate regulation during daily activity and in a market system undergoing crash dynamics. This kind of invariance reflects invariance of the system under renormalisation and resembles behaviour at criticality of a system undergoing continuous phase transition — indeed in both phenomena, such phase transition behaviour has been revealed. While the precise mechanism underlying invariance of the PDF under system renormalisation of both systems discussed is not to date understood, there is an intimate link between the non-Gaussian PDF characteristics and the persistent invariant correlation structure emerging between fluctuations across scale and time.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26343745','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26343745"><span id="translatedtitle">Meta-analysis in clinical trials <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>DerSimonian, Rebecca; Laird, Nan</p> <p>2015-11-01</p> <p>In this paper, we <span class="hlt">revisit</span> a 1986 article we published in this Journal, Meta-Analysis in Clinical Trials, where we introduced a random-effects <span class="hlt">model</span> to summarize the evidence about treatment efficacy from a number of related clinical trials. Because of its simplicity and ease of implementation, our approach has been widely used (with more than 12,000 citations to date) and the "DerSimonian and Laird method" is now often referred to as the 'standard approach' or a 'popular' method for meta-analysis in medical and clinical research. The method is especially useful for providing an overall effect estimate and for characterizing the heterogeneity of effects across a series of studies. Here, we review the background that led to the original 1986 article, briefly describe the random-effects approach for meta-analysis, explore its use in various settings and trends over time and recommend a refinement to the method using a robust variance estimator for testing overall effect. We conclude with a discussion of repurposing the method for Big Data meta-analysis and Genome Wide Association Studies for studying the importance of genetic variants in complex diseases. PMID:26343745</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015ACP....15.3803S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015ACP....15.3803S"><span id="translatedtitle"><span class="hlt">Revisiting</span> Twomey's approximation for peak supersaturation</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Shipway, B. J.</p> <p>2015-04-01</p> <p>Twomey's seminal 1959 paper provided lower and upper bound approximations to the estimation of peak supersaturation within an updraft and thus provides the first closed expression for the number of nucleated cloud droplets. The form of this approximation is simple, but provides a surprisingly good estimate and has subsequently been employed in more sophisticated treatments of nucleation parametrization. In the current paper, we <span class="hlt">revisit</span> the lower bound approximation of Twomey and make a small adjustment that can be used to obtain a more accurate calculation of peak supersaturation under all potential aerosol loadings and thermodynamic conditions. In order to make full use of this improved approximation, the underlying integro-differential equation for supersaturation evolution and the condition for calculating peak supersaturation are examined. A simple rearrangement of the algebra allows for an expression to be written down that can then be solved with a single lookup table with only one independent variable for an underlying lognormal aerosol population. While multimodal aerosol with N different dispersion characteristics requires 2N+1 inputs to calculate the activation fraction, only N of these one-dimensional lookup tables are needed. No additional information is required in the lookup table to deal with additional chemical, physical or thermodynamic properties. The resulting implementation provides a relatively simple, yet computationally cheap, physically based parametrization of droplet nucleation for use in climate and Numerical Weather Prediction <span class="hlt">models</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014PEPI..235...66K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014PEPI..235...66K"><span id="translatedtitle">Hotspot swells <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>King, Scott D.; Adam, Claudia</p> <p>2014-10-01</p> <p>The first attempts to quantify the width and height of hotspot swells were made more than 30 years ago. Since that time, topography, ocean-floor age, and sediment thickness datasets have improved considerably. Swell heights and widths have been used to estimate the heat flow from the core-mantle boundary, constrain numerical <span class="hlt">models</span> of plumes, and as an indicator of the origin of hotspots. In this paper, we repeat the analysis of swell geometry and buoyancy flux for 54 hotspots, including the 37 considered by Sleep (1990) and the 49 considered by Courtillot et al. (2003), using the latest and most accurate data. We are able to calculate swell geometry for a number of hotspots that Sleep was only able to estimate by comparison with other swells. We find that in spite of the increased resolution in global bathymetry <span class="hlt">models</span> there is significant uncertainty in our calculation of buoyancy fluxes due to differences in our measurement of the swells’ width and height, the integration method (volume integration or cross-sectional area), and the variations of the plate velocities between HS2-Nuvel1a (Gripp and Gordon, 1990) and HS3-Nuvel1a (Gripp and Gordon, 2002). We also note that the buoyancy flux for Pacific hotspots is in general larger than for Eurasian, North American, African and Antarctic hotspots. Considering that buoyancy flux is linearly related to plate velocity, we speculate that either the calculation of buoyancy flux using plate velocity over-estimates the actual vertical flow of material from the deep mantle or that convection in the Pacific hemisphere is more vigorous than the Atlantic hemisphere.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/21313894','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/21313894"><span id="translatedtitle">GLOBAL STAR FORMATION <span class="hlt">REVISITED</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Silk, Joseph; Norman, Colin E-mail: norman@stsci.edu</p> <p>2009-07-20</p> <p>A general treatment of disk star formation is developed from a dissipative multiphase <span class="hlt">model</span>, with the dominant dissipation due to cloud collisions. The Schmidt-Kennicutt (SK) law emerges naturally for star-forming disks and starbursts. We predict that there should be an inverse correlation between Tully-Fisher law and SK law residuals. The <span class="hlt">model</span> is extended to include a multiphase treatment of supernova feedback that leads to a turbulent pressure-regulated generalization of the star formation law and is applicable to gas-rich starbursts. Enhanced pressure, as expected in merger-induced star formation, enhances star formation efficiency. An upper limit is derived for the disk star formation rate in starbursts that depends on the ratio of global ISM to cloud pressures. We extend these considerations to the case where the interstellar gas pressure in the inner galaxy is dominated by outflows from a central active galactic nucleus (AGN). During massive spheroid formation, AGN-driven winds trigger star formation, resulting in enhanced supernova feedback and outflows. The outflows are comparable to the AGN-boosted star formation rate and saturate in the super-Eddington limit. Downsizing of both SMBH and spheroids is a consequence of AGN-driven positive feedback. Bondi accretion feeds the central black hole with a specific accretion rate that is proportional to the black hole mass. AGN-enhanced star formation is mediated by turbulent pressure and relates spheroid star formation rate to black hole accretion rate. The relation between black hole mass and spheroid velocity dispersion has a coefficient (Salpeter time to gas consumption time ratio) that provides an arrow of time. Highly efficient, AGN-boosted star formation can occur at high redshift.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006JGRE..111.6S07S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006JGRE..111.6S07S"><span id="translatedtitle">Hagfors' law <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sultan-Salem, Ahmed K.; Tyler, G. Leonard</p> <p>2006-04-01</p> <p>Hagfors' scattering law, σ°H($\\theta$), is in wide use in connection with the study of backscatter data from planetary surfaces because it provides good agreement with a variety of observations. The surface root-mean-square slope inferred on the basis of σ°H($\\theta$) is customarily taken as C-1/2, where C is the shape parameter in σ°H($\\theta$). The relationship between the surface slope and C is indefinite, however, because of the indeterminateness of the surface scales contributing to the scattering process. Moreover, the horizontal scale of the inferred slope obtained is not specified. As a consequence of limitations in the Kirchhoff approximation on which it is predicated, σ°H($\\theta$) does not conserve energy. The use of a fractional Brownian fractal surface <span class="hlt">model</span> leads to a scattering law with the same functional form as σ°H($\\theta$) when the Hurst exponent characterizing the fractal <span class="hlt">model</span> is 1/2. Fractal-based scattering laws, derived by applying the Kirchhoff approximation, suffer the same deficiency with regard to conservation of energy. In contrast to σ°H($\\theta$), slope information for fractal-based laws is explicit with respect to horizontal scale. Both σ°H($\\theta$) and fractal-based laws require that the illuminated surface area exceeds a certain value, which is a function of the electromagnetic wavelength and surface parameters, in order to reduce the surface radar cross section overestimation error, introduced by a mathematical approximation, below some specified value. This requirement may be necessary to take into account in experiments where the radar resolution cells are comparable in size to the wavelength, such as in Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/20819476','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/20819476"><span id="translatedtitle">Fechner's aesthetics <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Phillips, Flip; Norman, J Farley; Beers, Amanda M</p> <p>2010-01-01</p> <p>Gustav Fechner is widely respected as a founding father of experimental psychology and psychophysics but fewer know of his interests and work in empirical aesthetics. In the later 1800s, toward the end of his career, Fechner performed experiments to empirically evaluate the beauty of rectangles, hypothesizing that the preferred shape would closely match that of the so-called 'golden rectangle'. His findings confirmed his suspicions, but in the intervening decades there has been significant evidence pointing away from that finding. Regardless of the results of this one study, Fechner ushered in the notion of using a metric to evaluate beauty in a psychophysical way. In this paper, we recreate the experiment using more naturalistic stimuli. We evaluate subjects' preferences against <span class="hlt">models</span> that use various types of object complexity as metrics. Our findings that subjects prefer either very simple or very complex objects runs contrary to the hypothesized results, but are systematic none the less. We conclude that there are likely to be useful measures of aesthetic preference but they are likely to be complicated by the difficulty in defining some of their constituent parts. PMID:20819476</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/460077','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/460077"><span id="translatedtitle">The Oquirrh basin <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Erskine, M.C.</p> <p>1997-04-01</p> <p>The upper Paleozoic succession in the Oquirrh basin in unusually thick, up to 9300 m, and consists mainly of a Pennsylvanian-middle Permian miogeocline of northwestern Utah. Previous workers have suggested a tectonic origin for the Oquirrh basin that is incompatible with the basin location in both time and space. There is no evidence for Pennsylvanian and Lower Permian tectonism in the middle of the miogeocline. Thermal evidence from the Mississippian Mission Canyon shale does no support the implied deep burial of the crustal sag <span class="hlt">models</span> of basin formation. Stratigraphic and facies evidence indicates a growth fault origin for the basin. Regional isopach maps and facies maps are powerful tools in interpreting depositional environments and in reconstructing fold-and-thrust belts. However, the location of measured sections relative to the location of the growth fault basin. The Charleston-Nebo thrust may have essentially reversed the movement on a growth fault. Thick Oquirrh basin sedimentary rocks may not be required to balance structural sections across this thrust fault. A thin-skinned, extensional growth fault origin for the Oquirrh basin implies that the Cordilleran miogeocline did not participate in the Pennsylvanian north-vergent uplifts of the Ancestral Rocky Mountains.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26637330','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26637330"><span id="translatedtitle">Lupus erythematosus <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Kuhn, Annegret; Wenzel, Joerg; Bijl, Marc</p> <p>2016-01-01</p> <p>Lupus erythematosus (LE) is a multifactorial autoimmune disease with clinical manifestations of differing severity. The exact pathomechanisms and interactions resulting in the inflammatory and immunological processes of this heterogeneous disease remain elusive. Approaches in the understanding of the pathomechanisms revealed that the clinical expression of LE is predisposed by susceptibility genes and that various environmental factors are responsible for an abnormal immune response. Several studies demonstrated that ultraviolet (UV) light is one of the major factors in the pathogenesis of the disease. Standardized photoprovocation in patients with LE has been shown to be a safe and efficient <span class="hlt">model</span> for evaluating the underlying pathomechanisms which lead to the production of autoantibodies and immune complexes. In particular, interferons were defined as important players in the early activation of the immune system and were observed to play a specific role in the immunological interface between the innate and the adaptive immune system. Abnormalities or disturbances in the different processes of cell death, such as apoptosis or necrosis, have also been recognized as crucial in the pathogenesis of LE. Although each process is different and characterized by unique features, the processes are interrelated and result in a complex disease. PMID:26637330</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1999AAS...19410404M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1999AAS...19410404M"><span id="translatedtitle">SS Lac <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Milone, E. F.; Schiller, S. J.; Munari, U.; Kallrath, J.</p> <p>1999-05-01</p> <p>We have evidence confirming changes in light curve amplitude of the former eclipsing and current SB2 system SS Lac in the open cluster NGC 7209. Remeasured Harvard plate data and published and compiled data sets reveal that the depth of the primary minimum increased between the 1890s and early 1900s and decreased in the 1920s and 1930s. Peak fittings of the amplitude with phase suggests a peak amplitude centered ca. 1911.5, with eclipse onset at about 1885 and effective eclipse cessation late in 1937. We thus concur with the findings of Lehmann (IBVS 3610, 1991), that the apparent inclination varies with time and that a central eclipse occurred about 1911, and of Mossakovskaya (Astron. Lett., 19, 35, 1993), that eclipses ceased prior to 1940. Estimates of SS Lac from plates taken at Tashkent between 1937 and 1940 serve to confirm these results. We have completed now an exhaustive study of the radial velocity curves of Tomasella & Munari (1998, A&A, 335, 561) and all three potentially useful archival light curves available to us, and will discuss the implications of the solutions for <span class="hlt">models</span> of the system and the cluster to which it belongs. This work was supported in part by grants to Milone from NSERC of Canada, and the URGC of the University of Calgary.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/20669043','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/20669043"><span id="translatedtitle">Ancient deforestation <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hughes, J Donald</p> <p>2011-01-01</p> <p>The image of the classical Mediterranean environment of the Greeks and Romans had a formative influence on the art, literature, and historical perception of modern Europe and America. How closely does is this image congruent with the ancient environment as it in reality existed? In particular, how forested was the ancient Mediterranean world, was there deforestation, and if so, what were its effects? The consensus of historians, geographers, and other scholars from the mid-nineteenth century through the first three quarters of the twentieth century was that human activities had depleted the forests to a major extent and caused severe erosion. My research confirmed this general picture. Since then, revisionist historians have questioned these conclusions, maintaining instead that little environmental damage was done to forests and soils in ancient Greco-Roman times. In a reconsideration of the question, this paper looks at recent scientific work providing proxy evidence for the condition of forests at various times in ancient history. I look at three scientific methodologies, namely anthracology, palynology, and computer <span class="hlt">modeling</span>. Each of these avenues of research offers support for the concept of forest change, both in abundance and species composition, and episodes of deforestation and erosion, and confirms my earlier work. PMID:20669043</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3763044','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3763044"><span id="translatedtitle">Selective leptin resistance <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p></p> <p>2013-01-01</p> <p>In addition to effects on appetite and metabolism, leptin influences many neuroendocrine and physiological systems, including the sympathetic nervous system. Building on my Carl Ludwig Lecture of the American Physiological Society, I review the sympathetic and cardiovascular actions of leptin. The review focuses on a critical analysis of the concept of selective leptin resistance (SLR) and the role of leptin in the pathogenesis of obesity-induced hypertension in both experimental animals and humans. We introduced the concept of SLR in 2002 to explain how leptin might increase blood pressure (BP) in obese states, such as diet-induced obesity (DIO), that are accompanied by partial leptin resistance. This concept, analogous to selective insulin resistance in the metabolic syndrome, holds that in several genetic and acquired <span class="hlt">models</span> of obesity, there is preservation of the renal sympathetic and pressor actions of leptin despite attenuation of the appetite and weight-reducing actions. Two potential overlapping mechanisms of SLR are reviewed: 1) differential leptin molecular signaling pathways that mediate selective as opposed to universal leptin action and 2) brain site-specific leptin action and resistance. Although the phenomenon of SLR in DIO has so far focused on preservation of sympathetic and BP actions of leptin, consideration should be given to the possibility that this concept may extend to preservation of other actions of leptin. Finally, I review perplexing data on the effects of leptin on sympathetic activity and BP in humans and its role in human obesity-induced hypertension. PMID:23883674</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007SGeo...28....1D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007SGeo...28....1D"><span id="translatedtitle">Forensic seismology <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Douglas, A.</p> <p>2007-01-01</p> <p>The first technical discussions, held in 1958, on methods of verifying compliance with a treaty banning nuclear explosions, concluded that a monitoring system could be set up to detect and identify such explosions anywhere except underground: the difficulty with underground explosions was that there would be some earthquakes that could not be distinguished from an explosion. The development of adequate ways of discriminating between earthquakes and underground explosions proved to be difficult so that only in 1996 was a Comprehensive Nuclear Test Ban Treaty (CTBT) finally negotiated. Some of the important improvements in the detection and identification of underground tests—that is in forensic seismology—have been made by the UK through a research group at the Atomic Weapons Establishment (AWE). The paper describes some of the advances made in identification since 1958, particularly by the AWE Group, and the main features of the International Monitoring System (IMS), being set up to verify the Test Ban. Once the Treaty enters into force, then should a suspicious disturbance be detected the State under suspicion of testing will have to demonstrate that the disturbance was not a test. If this cannot be done satisfactorily the Treaty has provisions for on-site inspections (OSIs): for a suspicious seismic disturbance for example, an international team of inspectors will search the area around the estimated epicentre of the disturbance for evidence that a nuclear test really took place. Early observations made at epicentral distances out to 2,000 km from the Nevada Test Site showed that there is little to distinguish explosion seismograms from those of nearby earthquakes: for both source types the short-period (SP: ˜1 Hz) seismograms are complex showing multiple arrivals. At long range, say 3,000 10,000 km, loosely called teleseismic distances, the AWE Group noted that SP P waves—the most widely and well-recorded waves from underground explosions—were in contrast simple, comprising one or two cycles of large amplitude followed by a low-amplitude coda. Earthquake signals on the other hand were often complex with numerous arrivals of similar amplitude spread over 35 s or more. It therefore appeared that earthquakes could be recognised on complexity. Later however, complex explosion signals were observed which reduced the apparent effectiveness of complexity as a criterion for identifying earthquakes. Nevertheless, the AWE Group concluded that for many paths to teleseismic distances, Earth is transparent for P signals and this provides a window through which source differences will be most clearly seen. Much of the research by the Group has focused on understanding the influence of source type on P seismograms recorded at teleseismic distances. Consequently the paper concentrates on teleseismic methods of distinguishing between explosions and earthquakes. One of the most robust criteria for discriminating between earthquakes and explosions is the m b : M s criterion which compares the amplitudes of the SP P waves as measured by the body-wave magnitude m b, and the long-period (LP: ˜0.05 Hz) Rayleigh-wave amplitude as measured by the surface-wave magnitude M s; the P and Rayleigh waves being the main wave types used in forensic seismology. For a given M s, the m b for explosions is larger than for most earthquakes. The criterion is difficult to apply however, at low magnitude (say m b < 4.5) and there are exceptions—earthquakes that look like explosions. A difficulty with identification criteria developed in the early days of forensic seismology was that they were in the main empirical—it was not known why they appeared to work and if there were test sites or earthquakes where they would fail. Consequently the AWE Group in cooperation with the University of Cambridge used seismogram <span class="hlt">modelling</span> to try and understand what controls complexity of SP P seismograms, and to put the m b : M s criterion on a theoretical basis. The results of this work show that the m b : M s criterion is robust because several factors contribute to the separation of earthquakes and explosions. The principal reason for the separation however, is that for many orientations of the earthquake source there is at least one P nodal plane in the teleseismic window and this biases m b low. Only for earthquakes with near 45° dip-slip mechanisms where the antinode of P is in the source window is the m b: M s criterion predicted to fail. The results from <span class="hlt">modelling</span> are consistent with observation—in particular there are earthquakes, “anomalous events”, which look explosion-like on the m b: M s criterion, that turn out to have mechanisms close to 45° dip-slip. Fortunately the P seismograms from such earthquakes usually show pP and sP, the reflections from the free surface of P and S waves radiated upwards. From the pP P and sP P times the focal depth can be estimated. So far the estimated depth of the anomalous events have turned out to be ˜20 km, too deep to be explosions. Studies show that the observation that P seismograms are more complex than predicted by simple <span class="hlt">models</span> can be explained on the weak-signal hypothesis: the standard phases, direct P and the surface reflections, are weak because of amongst other things, the effects of the radiation pattern or obstacles on the source-to-receiver path; other non-standard arrivals then appear relatively large on the seismograms. What has come out of the <span class="hlt">modelling</span> of P seismograms is a criterion for recognising suspicious disturbances based on simplicity rather than complexity. Simple P seismograms for earthquakes at depths of more than a few kilometres are likely to be radiated only to stations that lie in a confined range of azimuths and distances. If then, simple seismograms are recorded over a wide range of distances and particularly azimuths, it is unlikely the source is an earthquake at depth. It is possible to test this using the relative amplitudes of direct P and later arrivals that might be surface reflections. The procedure is to use only the simple P seismograms on the assumption that whereas the propagation through Earth may make a signal more complex it is unlikely to make it simpler. From the amplitude of the coda of these seismograms, bounds can be placed on the size of possible pP and sP. The relative-amplitude method is then used to search for orientations of the earthquake source that are compatible with the observations. If no such orientations are found the source must be shallow so that any surface reflections merge with direct P, and hence could be an explosion. The IMS when completed will be a global network of 321 monitoring stations, including 170 seismological stations principally to detect the seismic waves from earthquakes and underground explosions. The IMS will also have stations with hydrophones, microbarographs and radionuclide detectors to detect explosions in the oceans and the atmosphere and any isotopes in the air characteristic of a nuclear test. The Global Communications Infrastructure provides communications between the IMS stations and the International Data Centre (IDC), Vienna, where the recordings from the monitoring stations is collected, collated, and analysed. The IDC issues bulletins listing geophysical disturbances, to States Signatories to the CTBT. The assessment of the disturbances to decide whether any are possible explosions, is a task for State Signatories. For each Signatory to do a detailed analysis of all disturbances would be expensive and time consuming. Fortunately many disturbances can be readily identified as earthquakes and removed from consideration—a process referred to as “event screening”. For example, many earthquakes with epicentres over the oceans can be distinguished from underwater explosions, because an explosion signal is of much higher frequency than that of earthquakes that occur below the ocean bed. Further, many earthquakes could clearly be identified at the IDC on the m b : M s criterion, but there is a difficulty—how to set the decision line. The possibility has to be very small that an explosion will be classed by mistake, as an earthquake. The decision line has therefore to be set conservatively, consequently with routine application of current screening criteria, only about 50% of earthquakes can be positively identified as such. Various methods have been proposed whereby a “determined violator” could avoid the provisions of a CTBT and carry out a test that would be either undetected or detected but not identified as an explosion. The increase in complexity and cost of such a test should discourage any State from attempting it. In addition, there is always the possibility of some stations detecting the test, the test being identified as suspicious, and so subject to an OSI. With time as the IMS becomes more efficient and effective it will act increasingly to deter anyone contemplating a clandestine test, from going ahead. What has emerged is several robust criteria. The criteria include: location, which when combined with hydro-acoustic data can identify earthquakes under the sea; m b : M s; and depth of focus. More detailed study is required of any remaining seismic disturbance that is regarded as suspicious: for example, is close to a site where nuclear tests have been carried out in the past. Any disturbance that is shown to be explosion-like, may be the subject of an OSI. One surprise is how little plate tectonics has contributed to resolving problems in forensic seismology. Much of the evidence for plate tectonics comes from seismological studies so it would be expected that the implications for Earth structure arising from forensic seismology would be consistent with plate-tectonic <span class="hlt">models</span>. So far the AWE Group have found little synergy between plate tectonics and forensic seismology. It is to be hoped that the large volume of seismological data of high quality now being collected by the IMS and the increasing number of digital stations, will result in a revised Earth <span class="hlt">model</span> that is consistent with the findings of forensic seismology, so that a future review of progress will show that the forensic seismologist can draw on this <span class="hlt">model</span> in attempting to interpret apparently anomalous seismograms.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li class="active"><span>16</span></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_16 --> <div id="page_17" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li class="active"><span>17</span></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="321"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/22819479','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/22819479"><span id="translatedtitle">Bhopal atmospheric dispersion <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Havens, Jerry; Walker, Heather; Spicer, Tom</p> <p>2012-09-30</p> <p>There is a vital need to understand details of the methylisocyanate (MIC) release that occurred at the 1984 Union Carbide Ltd. pesticide plant in Bhopal, India in order to avoid or respond to such releases in the future. However, we believe there are serious deficiencies in currently available dispersion predictions of the impact of toxic materials on humans and animals downwind of the plant. Specifically, cloud densities have been underestimated due to failure to account for the presence of a liquid/solid aerosol that would have been produced by the chemical reactions that caused the problem. Using data reported in Union Carbide's own investigation of the accident, which included chemical reaction data, we estimated aerosol compositions and cloud densities, then <span class="hlt">modeled</span> the Bhopal release, simulating potential exposure levels at various locations under a number of wind-condition scenarios. For the worst-case (low wind speed and high aerosol densities), our predicted MIC concentrations at ground level are at least one order of magnitude greater than any previously published estimates. The centerline elevation of the jetting plume released at 33 m elevation is predicted to rise to about 41 m before falling, resulting in a 40 ppm (Immediately Dangerous to Life or Health, IDLH) concentration contour that reaches the ground at about 410 m downwind of the release location. This is consistent with observations that the plant environs were not hard-hit while the public immediately downwind of the plant perimeter was severely exposed. Concentrations on the order of 1000 ppm are predicted at some ground-level locations, which are more consistent than previous estimates with the reported large numbers of deaths and injuries of humans and animals. PMID:22819479</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/16519362','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/16519362"><span id="translatedtitle">Texture synthesis: textons <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Charalampidis, Dimitrios</p> <p>2006-03-01</p> <p>This paper introduces a technique for synthesizing natural textures, with emphasis on quasiperiodic and structural textures. Textures are assumed to be composed of three components, namely illumination, structure, and stochastic. The contribution of this work is that, in contrast to previous techniques, it proposes a joint approach for handling the texture's global illumination, irregular structure, and stochastic component which may be correlated to the other two components. Furthermore, the proposed technique does not produce verbatim copies in the synthesized texture. More specifically, a top-down approach is used for extraction of texture elements (textons) in which, in contrast to previous texton-based approaches, no assumptions regarding perfect periodicity are made. The structure itself can be <span class="hlt">modeled</span> as a stochastic process. Consequently, textons are allowed to have irregular and nonidentical shapes. In the synthesis stage, a new nonregular textural structure is designed from the original one that defines the place holders for textons. We call such place holders empty textons (e-textons). The e-textons are filled in by a representative texton. Since e-textons do not have identical shapes, a texton shape-matching procedure is required. After adding the illumination to the structural component, a strictly localized version of a block sampling technique is applied to add the stochastic component. The block sampling technique combined with the addition of the illumination component provides a significant improvement in the appearance of synthesized textures. Results show that the proposed method is successful in synthesizing structural textures visually indistinguishable to the original. Moreover, the method is successful in synthesizing a variety of stochastic textures. PMID:16519362</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/923295','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/923295"><span id="translatedtitle">The Lanthanide Contraction <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Seitz, Michael; Oliver, Allen G.; Raymond, Kenneth N.</p> <p>2007-04-19</p> <p>A complete, isostructural series of lanthanide complexes (except Pm) with the ligand TREN-1,2-HOIQO has been synthesized and structurally characterized by means of single-crystal X-ray analysis. All complexes are 1D-polymeric species in the solid state, with the lanthanide being in an eight-coordinate, distorted trigonal-dodecahedral environment with a donor set of eight unique oxygen atoms. This series constitutes the first complete set of isostructural lanthanide complexes with a ligand of denticity greater than two. The geometric arrangement of the chelating moieties slightly deviates across the lanthanide series, as analyzed by a shape parameter metric based on the comparison of the dihedral angles along all edges of the coordination polyhedron. The apparent lanthanide contraction in the individual Ln-O bond lengths deviates considerably from the expected quadratic decrease that was found previously in a number of complexes with ligands of low denticity. The sum of all bond lengths around the trivalent metal cation, however, is more regular, showing an almost ideal quadratic behavior across the entire series. The quadratic nature of the lanthanide contraction is derived theoretically from Slater's <span class="hlt">model</span> for the calculation of ionic radii. In addition, the sum of all distances along the edges of the coordination polyhedron show exactly the same quadratic dependency as the Ln-X bond lengths. The universal validity of this coordination sphere contraction, concomitant with the quadratic decrease in Ln-X bond lengths, was confirmed by reexamination of four other, previously published, almost complete series of lanthanide complexes. Due to the importance of multidentate ligands for the chelation of rare-earth metals, this result provides a significant advance for the prediction and rationalization of the geometric features of the corresponding lanthanide complexes, with great potential impact for all aspects of lanthanide coordination.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/8838726','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/8838726"><span id="translatedtitle">Suture anchor strength <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Barber, F A; Herbert, M A; Click, J N</p> <p>1996-02-01</p> <p>The rapid proliferation of suture anchors continues. Our prior report on the pullout strength of 14 different anchors is supplemented by a similar test conducted on 8 additional anchors. Comparative data on modes of failure and failure strengths (ultimate loads to failure) for these new devices are compared statistically with the previously tested anchors. In a fresh never-frozen porcine femur <span class="hlt">model</span>, 10 samples of each of the additional anchors tested were threaded with stainless steel sutures and inserted into three different test areas (diaphyseal cortex, metaphyseal cortex, and a cancellous trough). Tensile stress parallel to the axis of insertion was applied at a rate of 12.5 mm/s by an Instron 1321 testing machine (Instron Corp, Canton, MA) until failure and mean anchor failure strengths calculated. The anchors tested were the Mitek G2 as a control, miniMitek, Mitek Superanchor, Mitek Rotator Cuff anchor (Mitek Products, Westwood, MA), Innovasive Devices Radial Osteal Compression device (Innovasive Devices, Hopkinton, MA), Arthrex Fastak (Arthrex Inc, Naples, FL), Arthrotek miniHarpoon (Arthrotek, Warsaw, IN), Orthopedic Biosystems PeBA 3 and PeBA 5 (Orthopedic Biosystems, Scottsdale, AZ), and AME 5.5 screw (American Medical Electronics, Richardson, TX). Failure mode (anchor pullout, suture eyelet cut out, or wire breakage) was generally consistent for each anchor type. The size of insertion hole is clinically important and each anchor's performance was evaluated as a function of its minor diameter or drill hole. For screw anchors, the larger the minor diameter of the screw, the higher the mean failure strengths in all three test areas (P = .001). However, larger drill holes for non-screw anchors resulted in lower mean failure strengths in cancellous bone (P = .03) and diaphyseal cortex (P < .005). PMID:8838726</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=+%22creative+economy+ecosystem%22+OR+%22creative+ideas%22++OR+%22innovation+in+education%22++OR+%22online+learning+capabilities%22++OR+%22digital+education%22++OR+%22new+methods+of+learning%22++OR+%22online+gaming+education%22+&id=EJ1026986','ERIC'); return false;" href="http://eric.ed.gov/?q=+%22creative+economy+ecosystem%22+OR+%22creative+ideas%22++OR+%22innovation+in+education%22++OR+%22online+learning+capabilities%22++OR+%22digital+education%22++OR+%22new+methods+of+learning%22++OR+%22online+gaming+education%22+&id=EJ1026986"><span id="translatedtitle"><span class="hlt">Revisiting</span> Mednick's <span class="hlt">Model</span> on Creativity-Related Differences in Associative Hierarchies. Evidence for a Common Path to Uncommon Thought</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Benedek, Mathias; Neubauer, Aljoscha C.</p> <p>2013-01-01</p> <p>Fifty years ago, Mednick ["Psychological Review", 69 (1962) 220] proposed an elaborate <span class="hlt">model</span> that aimed to explain how creative ideas are generated and why creative people are more likely to have creative ideas. The <span class="hlt">model</span> assumes that creative people have flatter associative hierarchies and as a consequence can more fluently retrieve…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/15287436','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/15287436"><span id="translatedtitle">Patient-practitioner-remedy (PPR) entanglement. Part 6. Miasms <span class="hlt">revisited</span>: non-linear quantum theory as a <span class="hlt">model</span> for the homeopathic process.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Milgrom, L R</p> <p>2004-07-01</p> <p>The possibility that non-linear quantum theory could be used to <span class="hlt">model</span> PPR entanglement is discussed in relation to the treatment of miasms. In this <span class="hlt">model</span>, miasms are imagined as disease entities behaving like solitary waves, or 'solitons' which, when trapped in a therapeutic state space, requiring equally soliton-like (miasmatic or high potency) remedies to effectively 'annihilate' them. PMID:15287436</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=+%22creative+economy+ecosystem%22+OR+%22creative+ideas%22++OR+%22innovation+in+education%22++OR+%22online+learning+capabilities%22++OR+%22digital+education%22++OR+%22new+methods+of+learning%22++OR+%22online+gaming+education%22++OR+%22new+methods+of+teaching%22+&pg=2&id=EJ1026986','ERIC'); return false;" href="http://eric.ed.gov/?q=+%22creative+economy+ecosystem%22+OR+%22creative+ideas%22++OR+%22innovation+in+education%22++OR+%22online+learning+capabilities%22++OR+%22digital+education%22++OR+%22new+methods+of+learning%22++OR+%22online+gaming+education%22++OR+%22new+methods+of+teaching%22+&pg=2&id=EJ1026986"><span id="translatedtitle"><span class="hlt">Revisiting</span> Mednick's <span class="hlt">Model</span> on Creativity-Related Differences in Associative Hierarchies. Evidence for a Common Path to Uncommon Thought</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Benedek, Mathias; Neubauer, Aljoscha C.</p> <p>2013-01-01</p> <p>Fifty years ago, Mednick ["Psychological Review", 69 (1962) 220] proposed an elaborate <span class="hlt">model</span> that aimed to explain how creative ideas are generated and why creative people are more likely to have creative ideas. The <span class="hlt">model</span> assumes that creative people have flatter associative hierarchies and as a consequence can more fluently retrieve</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010JHEP...05..027M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010JHEP...05..027M"><span id="translatedtitle">NLIE and finite size effects of the spin-1/2 XXZ and sine-Gordon <span class="hlt">models</span> with two boundaries <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Murgan, Rajan</p> <p>2010-05-01</p> <p>Starting from the T- Q equation of an open integrable {text{spin}} - 1/2 XXZ quantum spin chain with nondiagonal boundary terms, we derive a nonlinear integral equation (NLIE) of the sine-Gordon <span class="hlt">model</span> on a finite interval. We compute the boundary energy and the Casimir energy for the sine-Gordon <span class="hlt">model</span> with both left and right boundaries. A relation between the boundary parameters of the continuum <span class="hlt">model</span> and the lattice <span class="hlt">model</span> is given. We also present numerical results for the effective central charge of an open {text{spin}} - 1/2 XXZ quantum spin chain which find agreement with our analytical result for the central charge of the sine-Gordon <span class="hlt">model</span> in the ultraviolet (UV) limit.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2007AGUFM.U21B0422H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2007AGUFM.U21B0422H"><span id="translatedtitle">Allegre's Lead Paradox <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hofmann, A. W.; Goldstein, S. L.; Class, C.</p> <p>2007-12-01</p> <p>Allegre (1969), using a generalized Concordia plot, was first to note that in a 4.55 Ga old Earth, Pb has been removed from the mantle in preference to U, even though magmatism tends to do the opposite. He noted that this "contradiction" might require a separate reservoir where the missing lead is stored. This "contradiction", more commonly expressed by the conventional Holmes-Houtermans diagram, has become known as the "lead paradox." Several <span class="hlt">models</span> have been proposed to resolve it, ranging from late "core pumping" of Pb (as suggested by Allgre) to Pb storage in the mantle transition zone (Murphy et al. 2003) or in ancient parts of the lower continental crust. The idea of late core pumping has recently been revived by Wood & Halliday (2005) who suggested that Pb was sequestered through late sulfide segregation into the core. Here we propose that crystallization of Ca-perovskite, accompanied by segregation of a dense silicate melt toward the core-mantle boundary, can account for the apparently elevated U/Pb ratio of the accessible silicate Earth, particularly if the partition coefficient for U and Th in Ca-perovskite is as high as 400 as suggested by Corgne and Wood (2005). Such a dense liquid is the inferred consequence of the measured crossover of melting temperatures of silicate perovskite and ferro-periclase at about 1200 km depth, and the predicted Fe-rich eutectic and low melting temperatures in the lowermost mantle (Boehler, 2000). In addition, lower-mantle melt segregation with residual Ca-perovskite will cause a decrease in Nb/Ta from the primitive (chondritic) value in the accessible mantle, another, more recently discovered puzzle of mantle geochemistry. Downward segregation of a dense melt fraction and final solidification of the lowermost mantle may have been a slow process requiring more than 100 Ma, and involving a substantial fraction of the mantle. We suggest that this process served to stabilize the D'' reservoir storing solar noble gases (Tolstikhin & Hofmann, 2005) and subchondritic 142Nd/144Nd ratios (Boyet & Carlson, 2005), which these authors have ascribed to subduction of a primordial crust at an even earlier stage. Allegre, C.A. (1969) Earth Planet. Sci. Lett. 5, 261-269. Boehler, R. (2000) Reviews Geophys. 38, 221-235. Murphy, D.T. et al. (2003) J. Petrol. 44, 39-53. Tolstikhin, I.N. & Hofmann, A.W. (2005) Phys. Earth Planet. Int. 148, 109-130. Boyet, M. & Carlson, R.W. (2005) Science 309, 576-581. Corgne, A & Wood, B.J. (2005) Contrib. Min. Pet. 149, 85-97.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011AGUFM.B41F0259M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011AGUFM.B41F0259M"><span id="translatedtitle">Fire and Ice <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Macdonald, F. A.; Rooney, A.; Dudas, F. O.; Schmitz, M. D.</p> <p>2011-12-01</p> <p>Recent U-Pb ID-TIMS ages from NW Canada demonstrate a rough coincidence between the Franklin LIP and the initiation of the Sturtian glaciation(s). These events could be mechanistically related through an increase in weatherability of the continents and/or from an increase in planetary albedo. Both of these scenarios have predictions for the relative timing of the emplacement of the Franklin LIP and the onset of glaciations and for the Sr and Os composition of seawater. We report new Re/Os and U-Pb ID-TIMS zircon ages and Sr, Os, and C isotope results from Mongolia and northwest Canada. These data suggest: 1) The Islay carbon isotope anomaly in NW Canada is separated from the onset of the Sturtian glaciation(s) by >10 Myrs and is thus not directly related to the initiation of glaciations. 2) The Os isotopic composition of pre-Rapitan (Sturtian) sediments in NW Canada is remarkably unradiogenic, consistent with intense basalt weathering; however, it is uncertain if these strata were in full communication with the global ocean. 3) The Sr isotopic composition of pre-Strutian sediments on multiple continents also show a decrease leading into the glaciations, again consistent with an increase in basalt weathering prior to the glaciations. 4) The Os isotope composition of the post-glacial Twitya Formation in NW Canada is much more radiogenic than pre-glacial strata and likely reflects intense weathering of the continental crust associated with the deglaciation. 5) The Sr isotopic composition of seawater increases rapidly after both the Sturtian and Marinoan glaciations and is otherwise relatively stable in the Cryogenian, testifying to the extreme effect of the glaciations on the Sr isotopic composition of seawater. 6) The only other inflection in our new high-resolution Cryogenian Sr isotope curve occurs across the Tayshir carbon isotope anomaly, confirming links between the carbon cycle and continental weathering. 7) Current age constraints suggest a long duration of the Sturtian glaciation(s), >10 Myr. Together, these data give legs to the 'Fire and Ice' hypothesis of Godderis et al., 2003, and indicate major changes in weathering proxies on million-year timescales both before and after the Sturtian glaciations(s). However, it remains possible that the increased weatherability merely set the stage for global glaciations, leaving the Earth more vulnerable to a sudden change in insolation. Further precise ages and <span class="hlt">modeling</span> will shed additional light on the initiation mechanism of Snowball Earth.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006PhyA..370..190B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006PhyA..370..190B"><span id="translatedtitle">Fluid mechanics <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Brenner, Howard</p> <p>2006-10-01</p> <p>Öttinger's recent nontraditional incorporation of fluctuations into the formulation of the friction matrix appearing in the phenomenological GENERIC theory of nonequilibrium irreversible processes is shown to furnish transport equations for single-component gases and liquids undergoing heat transfer which support the view that revisions to the Navier-Stokes-Fourier (N-S-F) momentum/energy equation set are necessary, as empirically proposed by the author on the basis of an experimentally supported theory of diffuse volume transport. The hypothesis that the conventional N-S-F equations prevail without modification only in the case of “incompressible” fluids, where the density ρ of the fluid is uniform throughout, serves to determine the new phenomenological parameter α‧ appearing in the GENERIC friction matrix. In the case of ideal gases the consequences of this constitutive hypothesis are shown to yield results identical to those derived theoretically by Öttinger on the basis of a “proper” coarse-graining of Boltzmann's kinetic equation. A major consequence of the present work is that the fluid's specific momentum density v is equal to its volume velocity vv, rather than to its mass velocity vm, contrary to current views dating back 250 years to Euler. In the case of rarefied gases the proposed modifications are also observed to agree with those resulting from Klimontovich's molecularly based, albeit ad hoc, self-diffusion addendum to Boltzmann's collision integral. Despite the differences in their respective physical <span class="hlt">models</span>-molecular vs. phenomenological-the role played by Klimontovich's collisional addition to Boltzmann's equation in modifying the N-S-F equations is noted to constitute a molecular counterpart of Öttinger's phenomenological fluctuation addition to the GENERIC friction matrix. Together, these two theories collectively recognize the need to address multiple- rather than single- encounter collisions between a test molecule and its neighbors when formulating physically satisfactory statistical-mechanical theories of irreversible transport processes in gases. Overall, the results of the present work implicitly support the unorthodox view, implicit in the GENERIC scheme, that the translation of Newton's discrete mass-point molecular mechanics into continuum mechanics, the latter as embodied in the Cauchy linear momentum equation of fluid mechanics, cannot be correctly effected independently of the laws of thermodynamics. While Öttinger's modification of GENERIC necessitates fundamental changes in the foundations of fluid mechanics in regard to momentum transport, no basic changes are required in the foundations of linear irreversible thermodynamics (LIT) beyond recognizing the need to add volume to the usual list of extensive physical properties undergoing transport in single-species fluid continua, namely mass, momentum and energy. An alternative, nonGENERICally based approach to LIT, derived from our findings, is outlined at the conclusion of the paper. Finally, our proposed modifications of both Cauchy's linear momentum equation and Newton's rheological constitutive law for fluid-phase continua are noted to be mirrored by counterparts in the literature for solid-phase continua dating back to the classical interdiffusion experiments of Kirkendall and their subsequent interpretation by Darken in terms of diffuse volume transport.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014GPC...113...44H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014GPC...113...44H"><span id="translatedtitle">Cretaceous eustasy <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Haq, Bilal U.</p> <p>2014-02-01</p> <p>Eustatic sea-level changes of the Cretaceous are reevaluated based on a synthesis of global stratigraphic data. A new terminology for local/regional or relative sea-level changes (eurybatic shifts) is proposed to distinguish them from global (eustatic) sea-level changes, with the observation that all measures of sea-level change in any given location are eurybatic, even when they include a strong global signal. Solid-earth factors that influence inherited regional topography and thus modify physical measures of amplitude of the sea-level rises and falls locally are reviewed. One of these factors, dynamic topography (surface expression of mass flow in the upper mantle on land- and seascapes), is considered most pertinent in altering local measures of amplitude of sea-level events on third-order time scales (0.5-3.0 Myr). Insights gained from these <span class="hlt">models</span> have led to the reconciliation of variance between amplitude estimates of eurybatic shifts in any given region and global measures of eustatic changes. Global estimates of third-order events can only be guesstimated at best by averaging the eurybatic data from widely distributed time-synchronous events. Revised curves for both long-term and short-term sea-level variations are presented for the Cretaceous Period. The curve representing the long-term envelope shows that average sea levels throughout the Cretaceous remained higher than the present day mean sea level (75-250 m above PDMSL). Sea level reached a trough in mid Valanginian (~ 75 m above PDMSL), followed by two high points, the first in early Barremian (~ 160-170 m above PDMSL) and the second, the highest peak of the Cretaceous, in earliest Turonian (~ 240-250 m above PDMSL). The curve also displays two ~ 20 Myr-long periods of relatively high and stable sea levels (Aptian through early Albian and Coniacian through Campanian). The short-term curve identifies 58 third-order eustatic events in the Cretaceous, most have been documented in several basins, while a smaller number are included provisionally as eustatic, awaiting confirmation. The amplitude of sea-level falls varies from a minimum of ~ 20 m to a maximum of just over 100 m and the duration varies between 0.5 and 3 Myr. The causes for these relatively rapid, and at times large amplitude, sea-level falls in the Cretaceous remain unresolved, although based mainly on oxygen-isotopic data, the presence of transient ice cover on Antarctica as the driver remains in vogue as an explanation. This idea has, however, suffered a recent setback following the discovery of pristine foraminiferal tests in the Turonian of Tanzania whose oxygen-isotopic values show little variation, implying absence of glacioeustasy at least in the Turonian. The prevalence of 4th-order (~ 400 Kyr) cyclicity through most of the Cretaceous (and elsewhere in the Paleozoic, Jurassic and Cenozoic) implies that the periodicity on this time scale, presumably driven by long-term orbital eccentricity, may be a fundamental feature of depositional sequences throughout the Phanerozoic.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4876349','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4876349"><span id="translatedtitle">Extent of Resection of Glioblastoma <span class="hlt">Revisited</span>: Personalized Survival <span class="hlt">Modeling</span> Facilitates More Accurate Survival Prediction and Supports a Maximum-Safe-Resection Approach to Surgery</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Marko, Nicholas F.; Weil, Robert J.; Schroeder, Jason L.; Lang, Frederick F.; Suki, Dima; Sawaya, Raymond E.</p> <p>2014-01-01</p> <p>Purpose Approximately 12,000 glioblastomas are diagnosed annually in the United States. The median survival rate for this disease is 12 months, but individual survival rates can vary with patient-specific factors, including extent of surgical resection (EOR). The goal of our investigation is to develop a reliable strategy for personalized survival prediction and for quantifying the relationship between survival, EOR, and adjuvant chemoradiotherapy. Patients and Methods We used accelerated failure time (AFT) <span class="hlt">modeling</span> using data from 721 newly diagnosed patients with glioblastoma (from 1993 to 2010) to <span class="hlt">model</span> the factors affecting individualized survival after surgical resection, and we used the <span class="hlt">model</span> to construct probabilistic, patient-specific tools for survival prediction. We validated this <span class="hlt">model</span> with independent data from 109 patients from a second institution. Results AFT <span class="hlt">modeling</span> using age, Karnofsky performance score, EOR, and adjuvant chemoradiotherapy produced a continuous, nonlinear, multivariable survival <span class="hlt">model</span> for glioblastoma. The median personalized predictive error was 4.37 months, representing a more than 20% improvement over current methods. Subsequent <span class="hlt">model</span>-based calculations yield patient-specific predictions of the incremental effects of EOR and adjuvant therapy on survival. Conclusion Nonlinear, multivariable AFT <span class="hlt">modeling</span> outperforms current methods for estimating individual survival after glioblastoma resection. The <span class="hlt">model</span> produces personalized survival curves and quantifies the relationship between variables modulating patient-specific survival. This approach provides comprehensive, personalized, probabilistic, and clinically relevant information regarding the anticipated course of disease, the overall prognosis, and the patient-specific influence of EOR and adjuvant chemoradiotherapy. The continuous, nonlinear relationship identified between expected median survival and EOR argues against a surgical management strategy based on rigid EOR thresholds and instead provides the first explicit evidence supporting a maximum safe resection approach to glioblastoma surgery. PMID:24516010</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25758010','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25758010"><span id="translatedtitle"><span class="hlt">Model</span>-based verification of hypotheses on the origin of modern Japanese <span class="hlt">revisited</span> by Bayesian inference based on genome-wide SNP data.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Nakagome, Shigeki; Sato, Takehiro; Ishida, Hajime; Hanihara, Tsunehiko; Yamaguchi, Tetsutaro; Kimura, Ryosuke; Mano, Shuhei; Oota, Hiroki</p> <p>2015-06-01</p> <p>Various hypotheses for the peopling of the Japanese archipelago have been proposed, which can be classified into three <span class="hlt">models</span>: transformation, replacement, and hybridization. In recent years, one of the hybridization <span class="hlt">models</span> ("dual-structure <span class="hlt">model</span>") has been widely accepted. According to this <span class="hlt">model</span>, Neolithic hunter-gatherers known as Jomon, who are assumed to have originated in southeast Asia and lived in the Japanese archipelago greater than 10,000 years ago, admixed with an agricultural people known as Yayoi, whom were migrants from the East Asian continent 2,000-3,000 years ago. Meanwhile, some anthropologists propose that rather, morphological differences between the Jomon and Yayoi people can be explained by microevolution following the lifestyle change. To resolve this controversy, we compared three demographic <span class="hlt">models</span> by approximate Bayesian computation using genome-wide single nucleotide polymorphism (gwSNP) data from the Ainu people who are thought to be direct descendants of indigenous Jomon. If we assume Chinese people sampled in Beijing from HapMap have the same ancestry as Yayoi, then the hybridization <span class="hlt">model</span> is predicted to be between 29 and 63 times more likely than the replacement and transformation <span class="hlt">models</span>, respectively. Furthermore, our data provide strong support for a <span class="hlt">model</span> in which the Jomon lineages had population structure diversified in local areas before the admixture event. Initial divergence between the Jomon and Yayoi ancestries was dated to late Pleistocene, followed by the divergence of Jomon lineages at early Holocene. These results suggest gwSNP data provides a detailed picture of the complex hybridization <span class="hlt">model</span> for Japanese population history. PMID:25758010</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4081714','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4081714"><span id="translatedtitle">The cognitive-interpersonal maintenance <span class="hlt">model</span> of anorexia nervosa <span class="hlt">revisited</span>: a summary of the evidence for cognitive, socio-emotional and interpersonal predisposing and perpetuating factors</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p></p> <p>2013-01-01</p> <p>Aim To describe the evidence base relating to the Cognitive-Interpersonal Maintenance <span class="hlt">Model</span> for anorexia nervosa (AN). Background A Cognitive-Interpersonal Maintenance <span class="hlt">Model</span> maintenance <span class="hlt">model</span> for anorexia nervosa was described in 2006. This <span class="hlt">model</span> proposed that cognitive, socio-emotional and interpersonal elements acted together to both cause and maintain eating disorders. Method A review of the empirical literature relating to the key constructs of the <span class="hlt">model</span> (cognitive, socio-emotional, interpersonal) risk and maintaining factors for anorexia nervosa was conducted. Results Set shifting and weak central coherence (associated with obsessive compulsive traits) have been widely studied. There is some evidence to suggest that a strong eye for detail and weak set shifting are inherited vulnerabilities to AN. Set shifting and global integration are impaired in the ill state and contribute to weak central coherence. In addition, there are wide-ranging impairments in socio-emotional processing including: an automatic bias in attention towards critical and domineering faces and away from compassionate faces; impaired signalling of, interpretation and regulation of emotions. Difficulties in social cognition may in part be a consequence of starvation but inherited vulnerabilities may also contribute to these traits. The shared familial traits may accentuate family members’ tendency to react to the frustrating and frightening symptoms of AN with high expressed emotion (criticism, hostility, overprotection), and inadvertently perpetuate the problem. Conclusion The cognitive interpersonal <span class="hlt">model</span> is supported by accumulating evidence. The <span class="hlt">model</span> is complex in that cognitive and socio-emotional factors both predispose to the illness and are exaggerated in the ill state. Furthermore, some of the traits are inherited vulnerabilities and are present in family members. The clinical formulations from the <span class="hlt">model</span> are described as are new possibilities for targeted treatment. PMID:24999394</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26505905','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26505905"><span id="translatedtitle">The Balance-Scale Task <span class="hlt">Revisited</span>: A Comparison of Statistical <span class="hlt">Models</span> for Rule-Based and Information-Integration Theories of Proportional Reasoning.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hofman, Abe D; Visser, Ingmar; Jansen, Brenda R J; van der Maas, Han L J</p> <p>2015-01-01</p> <p>We propose and test three statistical <span class="hlt">models</span> for the analysis of children's responses to the balance scale task, a seminal task to study proportional reasoning. We use a latent class <span class="hlt">modelling</span> approach to formulate a rule-based latent class <span class="hlt">model</span> (RB LCM) following from a rule-based perspective on proportional reasoning and a new statistical <span class="hlt">model</span>, the Weighted Sum <span class="hlt">Model</span>, following from an information-integration approach. Moreover, a hybrid LCM using item covariates is proposed, combining aspects of both a rule-based and information-integration perspective. These <span class="hlt">models</span> are applied to two different datasets, a standard paper-and-pencil test dataset (N = 779), and a dataset collected within an online learning environment that included direct feedback, time-pressure, and a reward system (N = 808). For the paper-and-pencil dataset the RB LCM resulted in the best fit, whereas for the online dataset the hybrid LCM provided the best fit. The standard paper-and-pencil dataset yielded more evidence for distinct solution rules than the online data set in which quantitative item characteristics are more prominent in determining responses. These results shed new light on the discussion on sequential rule-based and information-integration perspectives of cognitive development. PMID:26505905</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4623502','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4623502"><span id="translatedtitle">The Balance-Scale Task <span class="hlt">Revisited</span>: A Comparison of Statistical <span class="hlt">Models</span> for Rule-Based and Information-Integration Theories of Proportional Reasoning</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Hofman, Abe D.; Visser, Ingmar; Jansen, Brenda R. J.; van der Maas, Han L. J.</p> <p>2015-01-01</p> <p>We propose and test three statistical <span class="hlt">models</span> for the analysis of children’s responses to the balance scale task, a seminal task to study proportional reasoning. We use a latent class <span class="hlt">modelling</span> approach to formulate a rule-based latent class <span class="hlt">model</span> (RB LCM) following from a rule-based perspective on proportional reasoning and a new statistical <span class="hlt">model</span>, the Weighted Sum <span class="hlt">Model</span>, following from an information-integration approach. Moreover, a hybrid LCM using item covariates is proposed, combining aspects of both a rule-based and information-integration perspective. These <span class="hlt">models</span> are applied to two different datasets, a standard paper-and-pencil test dataset (N = 779), and a dataset collected within an online learning environment that included direct feedback, time-pressure, and a reward system (N = 808). For the paper-and-pencil dataset the RB LCM resulted in the best fit, whereas for the online dataset the hybrid LCM provided the best fit. The standard paper-and-pencil dataset yielded more evidence for distinct solution rules than the online data set in which quantitative item characteristics are more prominent in determining responses. These results shed new light on the discussion on sequential rule-based and information-integration perspectives of cognitive development. PMID:26505905</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2013-title42-vol5/pdf/CFR-2013-title42-vol5-sec488-30.pdf','CFR2013'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2013-title42-vol5/pdf/CFR-2013-title42-vol5-sec488-30.pdf"><span id="translatedtitle">42 CFR 488.30 - <span class="hlt">Revisit</span> user fee for <span class="hlt">revisit</span> surveys.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2013&page.go=Go">Code of Federal Regulations, 2013 CFR</a></p> <p></p> <p>2013-10-01</p> <p>... SERVICES (CONTINUED) STANDARDS AND CERTIFICATION SURVEY, CERTIFICATION, AND ENFORCEMENT PROCEDURES General... be subject to user fees unless otherwise exempted. <span class="hlt">Revisit</span> survey means a survey performed with..., or substantiated complaint survey and that is designed to evaluate the extent to which...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2011-title42-vol5/pdf/CFR-2011-title42-vol5-sec488-30.pdf','CFR2011'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2011-title42-vol5/pdf/CFR-2011-title42-vol5-sec488-30.pdf"><span id="translatedtitle">42 CFR 488.30 - <span class="hlt">Revisit</span> user fee for <span class="hlt">revisit</span> surveys.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2011&page.go=Go">Code of Federal Regulations, 2011 CFR</a></p> <p></p> <p>2011-10-01</p> <p>... SERVICES (CONTINUED) STANDARDS AND CERTIFICATION SURVEY, CERTIFICATION, AND ENFORCEMENT PROCEDURES General... be subject to user fees unless otherwise exempted. <span class="hlt">Revisit</span> survey means a survey performed with..., or substantiated complaint survey and that is designed to evaluate the extent to which...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2010-title42-vol5/pdf/CFR-2010-title42-vol5-sec488-30.pdf','CFR'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2010-title42-vol5/pdf/CFR-2010-title42-vol5-sec488-30.pdf"><span id="translatedtitle">42 CFR 488.30 - <span class="hlt">Revisit</span> user fee for <span class="hlt">revisit</span> surveys.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2010&page.go=Go">Code of Federal Regulations, 2010 CFR</a></p> <p></p> <p>2010-10-01</p> <p>... SERVICES (CONTINUED) STANDARDS AND CERTIFICATION SURVEY, CERTIFICATION, AND ENFORCEMENT PROCEDURES General... be subject to user fees unless otherwise exempted. <span class="hlt">Revisit</span> survey means a survey performed with..., or substantiated complaint survey and that is designed to evaluate the extent to which...</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li class="active"><span>17</span></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_17 --> <div id="page_18" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li class="active"><span>18</span></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="341"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/24070292','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/24070292"><span id="translatedtitle"><span class="hlt">Revisiting</span> a many-body <span class="hlt">model</span> for water based on a single polarizable site: from gas phase clusters to liquid and air/liquid water systems.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Réal, Florent; Vallet, Valérie; Flament, Jean-Pierre; Masella, Michel</p> <p>2013-09-21</p> <p>We present a revised version of the water many-body <span class="hlt">model</span> TCPE [M. Masella and J.-P. Flament, J. Chem. Phys. 107, 9105 (1997)], which is based on a static three charge sites and a single polarizable site to <span class="hlt">model</span> the molecular electrostatic properties of water, and on an anisotropic short range many-body energy term specially designed to accurately <span class="hlt">model</span> hydrogen bonding in water. The parameters of the revised <span class="hlt">model</span>, denoted TCPE/2013, are here developed to reproduce the ab initio energetic and geometrical properties of small water clusters (up to hexamers) and the repulsive water interactions occurring in cation first hydration shells. The <span class="hlt">model</span> parameters have also been refined to reproduce two liquid water properties at ambient conditions, the density and the vaporization enthalpy. Thanks to its computational efficiency, the new <span class="hlt">model</span> range of applicability was validated by performing simulations of liquid water over a wide range of temperatures and pressures, as well as by investigating water liquid/vapor interfaces over a large range of temperatures. It is shown to reproduce several important water properties at an accurate enough level of precision, such as the existence liquid water density maxima up to a pressure of 1000 atm, the water boiling temperature, the properties of the water critical point (temperature, pressure, and density), and the existence of a "singularity" temperature at about 225 K in the supercooled regime. This <span class="hlt">model</span> appears thus to be particularly well-suited for characterizing ion hydration properties under different temperature and pressure conditions, as well as in different phases and interfaces. PMID:24070292</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26771029','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26771029"><span id="translatedtitle">Where does methanol lose hydrogen to trigger steam reforming? A <span class="hlt">revisit</span> of methanol dehydrogenation on the PdZn alloy <span class="hlt">model</span> obtained from kinetic Monte Carlo simulations.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Cheng, Feng; Chen, Zhao-Xu</p> <p>2016-01-27</p> <p>Pd/ZnO is a promising catalyst studied for methanol steam reforming (MSR) and the 1 : 1 PdZn alloy is demonstrated to be the active component. It is believed that MSR starts from methanol dehydrogenation to methoxy. Previous studies of methanol dehydrogenation on the ideal PdZn(111) surface show that methanol adsorbs weakly on the PdZn(111) surface and it is hard for methanol to transform into methoxy because of the high dehydrogenation barrier, indicating that the catalyst <span class="hlt">model</span> is not appropriate for investigating the first step of MSR. Using the <span class="hlt">model</span> derived from our recent kinetic Monte Carlo simulations, we examined the process CH3OH → CH3O → CH2O → CHO → CO. Compared with the ideal <span class="hlt">model</span>, methanol adsorbs much more strongly and the barrier from CH3OH → CH3O is much lower on the kMC <span class="hlt">model</span>. On the other hand, the C-H bond breaking of CH3O, CH2O and CHO becomes harder. We show that co-adsorbed water is important for refreshing the active sites. The present study shows that the first MSR step most likely takes place on three-fold hollow sites formed by Zn atoms, and the inhomogeneity of the PdZn alloy may exert significant influences on reactions. PMID:26771029</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4650684','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4650684"><span id="translatedtitle"><span class="hlt">Re-visiting</span> the nature and relationships between neurological signs and neurocognitive functions in first-episode schizophrenia: An invariance <span class="hlt">model</span> across time</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Chan, Raymond C. K.; Dai, Shan; Lui, Simon S. Y.; Ho, Karen K. Y.; Hung, Karen S. Y.; Wang, Ya; Geng, Fu-lei; Li, Zhi; Cheung, Eric F. C.</p> <p>2015-01-01</p> <p>The present study examined different types of neurological signs in patients with first-episode schizophrenia and their relationships with neurocognitive functions. Both cross-sectional and longitudinal designs were adopted with the use of the abridged Cambridge Neurological Inventory which comprises items capturing motor coordination, sensory integration and disinhibition. A total of 157 patients with first-episode schizophrenia were assessed at baseline and 101 of them were re-assessed at six-month interval. A structural equation <span class="hlt">model</span> (SEM) with invariance <span class="hlt">model</span> across time was used for data analysis. The <span class="hlt">model</span> fitted well with the data at baseline assessment, X^2(21) = 21.78, p = 0.413, NFI = 0.95, NNFI = 1.00, CFI = 1.00, IFI = 1.00, RMSEA = 0.015. Subsequent SEM analysis with invariance <span class="hlt">model</span> at six-month interval also demonstrated the same stable pattern across time and showed strong measurement invariance and structure invariance across time. Our findings suggest that neurological signs capture more or less the same construct captured by conventional neurocognitive tests in patients with schizophrenia. The measurement and structure of these relationships appear to be stable over time. PMID:26136150</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=treasure&pg=2&id=EJ912556','ERIC'); return false;" href="http://eric.ed.gov/?q=treasure&pg=2&id=EJ912556"><span id="translatedtitle"><span class="hlt">Re-Visiting</span> College Students' Attitudes toward the Internet-Based on a 6-T <span class="hlt">Model</span>: Gender and Grade Level Difference</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Chou, Chien; Wu, Huan-Chueh; Chen, Chao-Hsiu</p> <p>2011-01-01</p> <p>The purpose of this study is to propose a 6-T <span class="hlt">model</span> (Tool, Toy, Telephone, Territory, Treasure of Information, and Trade) to explore college students' Internet-related attitudes, and to examine whether gender and grade level make any difference in their attitudes. Data from 1069 participants were collected from 96 Taiwanese universities and…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26136150','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26136150"><span id="translatedtitle"><span class="hlt">Re-visiting</span> the nature and relationships between neurological signs and neurocognitive functions in first-episode schizophrenia: An invariance <span class="hlt">model</span> across time.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Chan, Raymond C K; Dai, Shan; Lui, Simon S Y; Ho, Karen K Y; Hung, Karen S Y; Wang, Ya; Geng, Fu-lei; Li, Zhi; Cheung, Eric F C</p> <p>2015-01-01</p> <p>The present study examined different types of neurological signs in patients with first-episode schizophrenia and their relationships with neurocognitive functions. Both cross-sectional and longitudinal designs were adopted with the use of the abridged Cambridge Neurological Inventory which comprises items capturing motor coordination, sensory integration and disinhibition. A total of 157 patients with first-episode schizophrenia were assessed at baseline and 101 of them were re-assessed at six-month interval. A structural equation <span class="hlt">model</span> (SEM) with invariance <span class="hlt">model</span> across time was used for data analysis. The <span class="hlt">model</span> fitted well with the data at baseline assessment, X^2(21) = 21.78, p = 0.413, NFI = 0.95, NNFI = 1.00, CFI = 1.00, IFI = 1.00, RMSEA = 0.015. Subsequent SEM analysis with invariance <span class="hlt">model</span> at six-month interval also demonstrated the same stable pattern across time and showed strong measurement invariance and structure invariance across time. Our findings suggest that neurological signs capture more or less the same construct captured by conventional neurocognitive tests in patients with schizophrenia. The measurement and structure of these relationships appear to be stable over time. PMID:26136150</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22351105','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22351105"><span id="translatedtitle">SU-E-T-284: <span class="hlt">Revisiting</span> Reference Dosimetry for the <span class="hlt">Model</span> S700 Axxent 50 KV{sub p} Electronic Brachytherapy Source</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Hiatt, JR; Rivard, MJ</p> <p>2014-06-01</p> <p>Purpose: The <span class="hlt">model</span> S700 Axxent electronic brachytherapy source by Xoft was characterized in 2006 by Rivard et al. The source design was modified in 2006 to include a plastic centering insert at the source tip to more accurately position the anode. The objectives of the current study were to establish an accurate Monte Carlo source <span class="hlt">model</span> for simulation purposes, to dosimetrically characterize the new source and obtain its TG-43 brachytherapy dosimetry parameters, and to determine dose differences between the source with and without the centering insert. Methods: Design information from dissected sources and vendor-supplied CAD drawings were used to devise the source <span class="hlt">model</span> for radiation transport simulations of dose distributions in a water phantom. Collision kerma was estimated as a function of radial distance, r, and polar angle, θ, for determination of reference TG-43 dosimetry parameters. Simulations were run for 10{sup 10} histories, resulting in statistical uncertainties on the transverse plane of 0.03% at r=1 cm and 0.08% at r=10 cm. Results: The dose rate distribution the transverse plane did not change beyond 2% between the 2006 <span class="hlt">model</span> and the current study. While differences exceeding 15% were observed near the source distal tip, these diminished to within 2% for r>1.5 cm. Differences exceeding a factor of two were observed near θ=150° and in contact with the source, but diminished to within 20% at r=10 cm. Conclusions: Changes in source design influenced the overall dose rate and distribution by more than 2% over a third of the available solid angle external from the source. For clinical applications using balloons or applicators with tissue located within 5 cm from the source, dose differences exceeding 2% were observed only for θ>110°. This study carefully examined the current source geometry and presents a modern reference TG-43 dosimetry dataset for the <span class="hlt">model</span> S700 source.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/17020371','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/17020371"><span id="translatedtitle"><span class="hlt">Revisiting</span> Bohr's semiclassical quantum theory.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ben-Amotz, Dor</p> <p>2006-10-12</p> <p>Bohr's atomic theory is widely viewed as remarkable, both for its accuracy in predicting the observed optical transitions of one-electron atoms and for its failure to fully correspond with current electronic structure theory. What is not generally appreciated is that Bohr's original semiclassical conception differed significantly from the Bohr-Sommerfeld theory and offers an alternative semiclassical approximation scheme with remarkable attributes. More specifically, Bohr's original method did not impose action quantization constraints but rather obtained these as predictions by simply matching photon and classical orbital frequencies. In other words, the hydrogen atom was treated entirely classically and orbital quantized emerged directly from the Planck-Einstein photon quantization condition, E = h nu. Here, we <span class="hlt">revisit</span> this early history of quantum theory and demonstrate the application of Bohr's original strategy to the three quintessential quantum systems: an electron in a box, an electron in a ring, and a dipolar harmonic oscillator. The usual energy-level spectra, and optical selection rules, emerge by solving an algebraic (quadratic) equation, rather than a Bohr-Sommerfeld integral (or Schroedinger) equation. However, the new predictions include a frozen (zero-kinetic-energy) state which in some (but not all) cases lies below the usual zero-point energy. In addition to raising provocative questions concerning the origin of quantum-chemical phenomena, the results may prove to be of pedagogical value in introducing students to quantum mechanics. PMID:17020371</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015SCPMA..58j2001W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015SCPMA..58j2001W"><span id="translatedtitle">A short <span class="hlt">revisit</span> to Kuo-Brown effective interactions</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Wang, XiaoBao; Dong, GuoXiang</p> <p>2015-10-01</p> <p>This paper is a short <span class="hlt">revisit</span> to Kuo-Brown effective interaction derived from the Hamada-Johnston nucleon-nucleon potential, done by Gerry Brown and Tom Kuo. This effective interaction, derived in year 1966, is the first attempt to describe nuclear structure properties from the free nucleon-nucleon potential. Nowadays much progress has been achieved for the effective interactions in shell <span class="hlt">model</span>. We would compare the effective interactions obtained in the 1966 paper with up-to-date shell-<span class="hlt">model</span> interactions in sd-shell and pf-shell <span class="hlt">model</span> space. Recent knowledge of effective interactions on nuclear structure, can also be traced in the Kuo- Brown effective interaction, i.e., the universal roles of central and tensor forces, which reminds us that such discovery should be noticed much earlier.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Arendt&pg=2&id=EJ1018864','ERIC'); return false;" href="http://eric.ed.gov/?q=Arendt&pg=2&id=EJ1018864"><span id="translatedtitle">The Evil of Banality: Arendt <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Minnich, Elizabeth</p> <p>2014-01-01</p> <p>"The banality of evil" (Arendt) remains controversial and useful. Ironically, the concept is now itself a banality. To <span class="hlt">revisit</span> and extend it, we consider the "evil of banality", the profound dangers of cliched thoughtlessness. A distinction is proposed: "intensive" versus "extensive evils". The former takes</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=job+AND+performance+AND+personality&pg=4&id=EJ949448','ERIC'); return false;" href="http://eric.ed.gov/?q=job+AND+performance+AND+personality&pg=4&id=EJ949448"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Skills Agenda: A Complicated Geography</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Saunders, Angharad</p> <p>2011-01-01</p> <p>This paper <span class="hlt">revisits</span> the skills agenda and suggests that in light of shifts from supply-side to demand-led provision within the UK higher education sector, there is a need to think more critically about the role and place of skills within university curricula. It suggests that if universities are to respond effectively to sector changes, then the…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=quantitative+AND+analyse&pg=7&id=EJ807531','ERIC'); return false;" href="http://eric.ed.gov/?q=quantitative+AND+analyse&pg=7&id=EJ807531"><span id="translatedtitle">Attention to Form and Meaning <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Leow, Ronald P.; Hsieh, Hui-Chen; Moreno, Nina</p> <p>2008-01-01</p> <p>The present study <span class="hlt">revisited</span> the issue of simultaneous attention to form and meaning from a methodological perspective that addressed several potential methodological issues of previous research in this strand of inquiry. Seventy-two second-semester-level participants were randomly assigned to one of five experimental groups, including a control,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=led+AND+lights&pg=7&id=EJ949448','ERIC'); return false;" href="http://eric.ed.gov/?q=led+AND+lights&pg=7&id=EJ949448"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Skills Agenda: A Complicated Geography</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Saunders, Angharad</p> <p>2011-01-01</p> <p>This paper <span class="hlt">revisits</span> the skills agenda and suggests that in light of shifts from supply-side to demand-led provision within the UK higher education sector, there is a need to think more critically about the role and place of skills within university curricula. It suggests that if universities are to respond effectively to sector changes, then the</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Hussein+AND+Saddam&id=EJ1018864','ERIC'); return false;" href="http://eric.ed.gov/?q=Hussein+AND+Saddam&id=EJ1018864"><span id="translatedtitle">The Evil of Banality: Arendt <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Minnich, Elizabeth</p> <p>2014-01-01</p> <p>"The banality of evil" (Arendt) remains controversial and useful. Ironically, the concept is now itself a banality. To <span class="hlt">revisit</span> and extend it, we consider the "evil of banality", the profound dangers of cliched thoughtlessness. A distinction is proposed: "intensive" versus "extensive evils". The former takes…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=counseling+AND+skills&pg=6&id=EJ698355','ERIC'); return false;" href="http://eric.ed.gov/?q=counseling+AND+skills&pg=6&id=EJ698355"><span id="translatedtitle"><span class="hlt">Revisiting</span> Basic Counseling Skills with Children</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Van Velsor, Patricia</p> <p>2004-01-01</p> <p>Counseling with children can be challenging for counselors whose training focused on adult clients. The purpose of this article is to offer information to counselors seeking to improve their skills with children, <span class="hlt">revisiting</span> a topic discussed in an earlier Journal of Counseling & Development article by P. Erdman and R. Lampe (1996). Examples of…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=list+AND+resources+AND+called&pg=7&id=ED344225','ERIC'); return false;" href="http://eric.ed.gov/?q=list+AND+resources+AND+called&pg=7&id=ED344225"><span id="translatedtitle">Africa <span class="hlt">Revisited</span>. Impact II Dissemination Packet.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Smiling, Sandra</p> <p></p> <p>This paper briefly describes a unit of study or program called "Africa <span class="hlt">Revisited</span>," which gives students an opportunity to read African folktales and take part in making them come alive through sociodramatics, improvisations, puppetry, and creative writing. The paper's five main sections are as follows: (1) Project Overview; (2) Project Goals; (3)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=difference+AND+mentality&pg=2&id=EJ738721','ERIC'); return false;" href="http://eric.ed.gov/?q=difference+AND+mentality&pg=2&id=EJ738721"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Regenerative Possibilities of Ortiz</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Duques, Matthew</p> <p>2004-01-01</p> <p>The author of this article <span class="hlt">revisits</span> Simon Ortiz's poem, "From Sand Creek," in which the latter can in so few words convey both the horrific tragedy of conquest and colonization, while at the same time find a space for possibility, a means for recovery that is never about forgetting but always occurs as a kind of recuperative remembering. Ortiz</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/pages/biblio/1182470-phenomenology-oscillations-revisited','SCIGOV-DOEP'); return false;" href="http://www.osti.gov/pages/biblio/1182470-phenomenology-oscillations-revisited"><span id="translatedtitle">Phenomenology of n - n ¯ oscillations <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/pages">DOE PAGESBeta</a></p> <p>Gardner, S.; Jafari, E.</p> <p>2015-05-22</p> <p>We <span class="hlt">revisit</span> the phenomenology of n-n¯ oscillations in the presence of external magnetic fields, highlighting the role of spin. We show, contrary to long-held belief, that the n-n¯ transition rate need not be suppressed, opening new opportunities for its empirical study.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4824495','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4824495"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Middle Molecule Hypothesis of Uremic Toxicity: A Systematic Review of Beta 2 Microglobulin Population Kinetics and Large Scale <span class="hlt">Modeling</span> of Hemodialysis Trials In Silico</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Roumelioti, Maria Eleni; Nolin, Thomas; Unruh, Mark L.; Argyropoulos, Christos</p> <p>2016-01-01</p> <p>Background Beta-2 Microglobulin (β2M) is a prototypical “middle molecule” uremic toxin that has been associated with a higher risk of death in hemodialysis patients. A quantitative description of the relative importance of factors determining β2M concentrations among patients with impaired kidney function is currently lacking. Methods Herein we undertook a systematic review of existing studies reporting patient level data concerning generation, elimination and distribution of β2M in order to develop a population <span class="hlt">model</span> of β2M kinetics. We used this <span class="hlt">model</span> and previously determined relationships between predialysis β2M concentration and survival, to simulate the population distribution of predialysis β2M and the associated relative risk (RR) of death in patients receiving conventional thrice-weekly hemodialysis with low flux (LF) and high flux (HF) dialyzers, short (SD) and long daily (LD) HF hemodialysis sessions and on-line hemodiafiltration at different levels of residual renal function (RRF). Results We identified 9 studies of 106 individuals and 156 evaluations of or more compartmental kinetic parameters of β2M. These studies used a variety of experimental methods to determine β2M kinetics ranging from isotopic dilution to profiling of intra/inter dialytic concentration changes. Most of the patients (74/106) were on dialysis with minimal RRF, thus facilitating the estimation of non-renal elimination kinetics of β2M. In large scale (N = 10000) simulations of individuals drawn from the population of β2M kinetic parameters, we found that, higher dialytic removal materially affects β2M exposures only when RRF (renal clearance of β2M) was below 2 ml/min. In patients initiating conventional HF hemodialysis, total loss of RRF was predicted to be associated with a RR of death of more than 20%. Hemodiafiltration and daily dialysis may decrease the high risk of death of anuric patients by 10% relative to conventional, thrice weekly HF dialysis. Only daily long sessions of hemodialysis consistently reduced mortality risk between 7–19% across the range of β2M generation rate. Conclusions Preservation of RRF should be considered one of the therapeutic goals of hemodialysis practice. Randomized controlled trials of novel dialysis modalities may require large sample sizes to detect an effect on clinical outcomes even if they enroll anuric patients. The developed population <span class="hlt">model</span> for β2M may allow personalization of hemodialysis prescription and/or facilitate the design of such studies by identifying patients with higher β2M generation rate. PMID:27055286</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015PhDT.......189S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015PhDT.......189S"><span id="translatedtitle">Machining as a mechanical property test <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Smith, David L.</p> <p></p> <p>There is much need for data on mechanical behavior of metals at high strains and strain rates. This need is dictated by <span class="hlt">modeling</span> of processes like forming and machining, wherein the material in the deformation zone is subjected to severe deformation conditions atypical of conventional material property tests such as tension and torsion. Accurate flow stress data is an essential input for robust prediction of process outputs. Similar requirements arise from applications in high speed ballistic penetration and design of materials for armor. Since the deformation zone in cutting of metals is characterized by unique and extreme combinations of strain, strain rate and temperature, an opportunity exists for using plane-strain cutting as a mechanical property test for measuring flow properties of metals. The feasibility of using plane-strain cutting to measure flow properties of metals is <span class="hlt">revisited</span> in the light of recent data showing controllability of the deformation conditions in chip formation by systematic variation of process input parameters. A method is outlined as to how the deformation conditions can be varied by changing the process parameters. The method is applied to cutting of commercially pure copper (FCC), iron (BCC) and zinc (HCP). Forces and chip geometries are measured, in conjunction with particle image velocimetry characterization of the deformation using high speed image sequences. The flow stresses are estimated from these measurements. The measured flow stress and its dependence on strain are shown to agree well with prior measurements of these parameters using conventional tests, and flow stress inferred from hardness characterization. The method is also demonstrated to be able to measure properties of metals that recrystallize at room temperature (zinc), wherein quasi-static tests predict much lower strength. Sources of variability and uncertainty in the application of this measurement technique are discussed. Future work in the context of further evaluation of this measurement approach is proposed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/21546354','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/21546354"><span id="translatedtitle"><span class="hlt">Revisiting</span> the yeast PPR proteins--application of an Iterative Hidden Markov <span class="hlt">Model</span> algorithm reveals new members of the rapidly evolving family.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lipinski, Kamil A; Puchta, Olga; Surendranath, Vineeth; Kudla, Marek; Golik, Pawel</p> <p>2011-10-01</p> <p>Pentatricopeptide repeat (PPR) proteins are the largest known RNA-binding protein family, and are found in all eukaryotes, being particularly abundant in higher plants. PPR proteins localize mostly to mitochondria and chloroplasts, and many were shown to modulate organellar genome expression on the posttranscriptional level. Although the genomes of land plants encode hundreds of PPR proteins, only a few have been identified in Fungi and Metazoa. As the current PPR motif profiles are built mainly on the basis of the predominant plant sequences, they are unlikely to be optimal for detecting fungal and animal members of the family, and many putative PPR proteins in these genomes may remain undetected. In order to verify this hypothesis, we designed a hidden Markov <span class="hlt">model</span>-based bioinformatic tool called Supervised Clustering-based Iterative Phylogenetic Hidden Markov <span class="hlt">Model</span> algorithm for the Evaluation of tandem Repeat motif families (SCIPHER) using sequence data from orthologous clusters from available yeast genomes. This approach allowed us to assign 12 new proteins in Saccharomyces cerevisiae to the PPR family. Similarly, in other yeast species, we obtained a 5-fold increase in the detection of PPR motifs, compared with the previous tools. All the newly identified S. cerevisiae PPR proteins localize in the mitochondrion and are a part of the RNA processing interaction network. Furthermore, the yeast PPR proteins seem to undergo an accelerated divergent evolution. Analysis of single and double amino acid substitutions in the Dmr1 protein of S. cerevisiae suggests that cooperative interactions between motifs and pseudoreversion could be the force driving this rapid evolution. PMID:21546354</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li class="active"><span>18</span></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_18 --> <div id="page_19" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li class="active"><span>19</span></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="361"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2259041','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2259041"><span id="translatedtitle">Silicon Uptake in Diatoms <span class="hlt">Revisited</span>: A <span class="hlt">Model</span> for Saturable and Nonsaturable Uptake Kinetics and the Role of Silicon Transporters1[OA</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Thamatrakoln, Kimberlee; Hildebrand, Mark</p> <p>2008-01-01</p> <p>The silicic acid uptake kinetics of diatoms were studied to provide a mechanistic explanation for previous work demonstrating both nonsaturable and Michaelis-Menten-type saturable uptake. Using 68Ge(OH)4 as a radiotracer for Si(OH)4, we showed a time-dependent transition from nonsaturable to saturable uptake kinetics in multiple diatom species. In cells grown under silicon (Si)-replete conditions, Si(OH)4 uptake was initially nonsaturable but became saturable over time. Cells prestarved for Si for 24 h exhibited immediate saturable kinetics. Data suggest nonsaturability was due to surge uptake when intracellular Si pool capacity was high, and saturability occurred when equilibrium was achieved between pool capacity and cell wall silica incorporation. In Thalassiosira pseudonana at low Si(OH)4 concentrations, uptake followed sigmoidal kinetics, indicating regulation by an allosteric mechanism. Competition of Si(OH)4 uptake with Ge(OH)4 suggested uptake at low Si(OH)4 concentrations was mediated by Si transporters. At high Si(OH)4, competition experiments and nonsaturability indicated uptake was not carrier mediated and occurred by diffusion. Zinc did not appear to be directly involved in Si(OH)4 uptake, in contrast to a previous suggestion. A <span class="hlt">model</span> for Si(OH)4 uptake in diatoms is presented that proposes two control mechanisms: active transport by Si transporters at low Si(OH)4 and diffusional transport controlled by the capacity of intracellular pools in relation to cell wall silica incorporation at high Si(OH)4. The <span class="hlt">model</span> integrates kinetic and equilibrium components of diatom Si(OH)4 uptake and consistently explains results in this and previous investigations. PMID:18162598</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015EGUGA..1712617M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015EGUGA..1712617M"><span id="translatedtitle">Configuration of geological domains and geodynamic evolution of the Africa-Eurasia plate boundary off SW Iberia <span class="hlt">revisited</span> based on seismic velocity and density <span class="hlt">models</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Martínez-Loriente, Sara; Sallarès, Valentí; Gràcia, Eulàlia; Bartolome, Rafael; Ranero, César</p> <p>2015-04-01</p> <p>We present a new classification of geological (basement) domains at the Africa-Eurasia plate boundary offshore SW Iberia, together with a regional geodynamic reconstruction spanning from the Mesozoic extension to the Neogene-to-present-day convergence. It is based on seismic velocity and density <span class="hlt">models</span> along two regional wide-angle seismic transects, one running NW-SE from the Tagus to the Seine abyssal plains, and the other running N-S from S Portugal to the Seine Abyssal Plain, combined with previously available information. The seismic velocity and density structure at the Seine Abyssal Plain and the internal Gulf of Cadiz indicates the presence of a highly heterogeneous oceanic crust, similar to that described in ultra-slow spreading centers, whereas in the Horseshoe and Tagus abyssal plains, the basement structure resembles that of exhumed mantle sections identified in the Northern Atlantic margin. The integration of all this new information allows defining the presence of three oceanic domains off SW Iberia: (1) the Seine Abyssal Plain domain, generated during the first stages of slow seafloor spreading in the NE segment of the Central Atlantic (Early Jurassic); (2) the Gulf of Cadiz domain, made of oceanic crust generated in the Alpine-Tethys spreading system between Iberia and Africa, which was coeval with the formation of the Seine Abyssal Plain domain and lasted up to the North Atlantic continental break-up (Late Jurassic); and (3) the Gorringe Bank domain, mainly made of rocks exhumed from the mantle with little synchronous magmatism, which formed during the first stages of North Atlantic opening (Early Cretaceous). Our <span class="hlt">models</span> suggest that the Seine Abyssal Plain and Gulf of Cadiz domains are separated by the Lineament South strike-slip fault, whereas the Gulf of Cadiz and Gorringe Bank domains appear to be limited by a deep thrust fault located at the center of the Horseshoe Abyssal Plain, which coincides with the seismicity cluster nucleated in the middle of the plain that shows moment tensor solutions of reverse faulting at depths of 40-60 km. The formation and evolution of these three domains during the Mesozoic is key to understand the sequence of events that occurred during the first stages of opening of the Northern Atlantic and its connection and interplay with the Western Mediterranean basin.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3152302','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3152302"><span id="translatedtitle">Mouse <span class="hlt">models</span> to assess the efficacy of non-typhoidal Salmonella vaccines: <span class="hlt">revisiting</span> the role of host innate susceptibility and routes of challenge</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Simon, Raphael; Tennant, Sharon M.; Galen, James E.; Levine, Myron M.</p> <p>2011-01-01</p> <p>Non-typhoidal Salmonella enterica (NTS) serovars Typhimurium and Enteritidis are important causes of bacterial gastroenteritis in the USA and worldwide. In sub-Saharan Africa these two serovars are emerging as agents associated with lethal invasive disease (e.g., bacteremia, meningitis). The development of NTS vaccines, based on mucosally-administered live attenuated strains and parenteral non-living antigens, could diminish the NTS disease burden globally. Mouse <span class="hlt">models</span> of S. Typhimurium and S. Enteritidis invasive disease can accelerate the development of NTS vaccines. Live attenuated NTS vaccines elicit both cellular and humoral immunity in mice and their efficacy is well established. In contrast, non-living vaccines that primarily elicit humoral immunity have demonstrated variable efficacy. An analysis of the reported studies with non-living vaccines against S. Typhimurium and S. Enteritidis reveals that efficacy is influenced by two important independent variables: 1) the innate susceptibility to NTS infection that differs dramatically between commonly used mouse strains and, 2) the virulence of the NTS strain used for challenge. Protection by non-living vaccines has generally been seen only in host-pathogen interactions where a sub-lethal infection results, such as challenging resistant mice with either highly virulent or weakly virulent strains or susceptible mice with weakly virulent strains. The immunologic basis of this discrepancy and the implications for human NTS vaccine development are reviewed herein. PMID:21616112</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013EGUGA..15.4511S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013EGUGA..15.4511S"><span id="translatedtitle">Short-term foreshocks in Southern California and Italy <span class="hlt">revisited</span>: Observed deviations from the Epidemic-Type Aftershock Sequence (ETAS) <span class="hlt">Model</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Seif, Stefanie; Mignan, Arnaud; Wiemer, Stefan</p> <p>2013-04-01</p> <p>Numerous studies have suggested that short-term foreshocks observed prior to large earthquakes are undistinguishable from the normal behaviour of seismicity, which is well described for example by the Epidemic-Type Aftershock Sequence (ETAS) <span class="hlt">model</span>. Here we show that these studies fail to extract abnormal foreshock behaviour due to the much more frequent occurrence of aftershocks in comparison to potential foreshocks, which results in undervaluing the role of foreshocks. We first define mainshocks as earthquakes of magnitude M6+ and use a space-time-magnitude window method with a maximum distance of 10 km to the mainshock, a maximum time range of 3 days before the mainshock and a minimum magnitude M4+ to define foreshocks in Southern California and in Italy. We then compare the observed rate of foreshock-mainshock pairs to the rate expected by ETAS simulations. Similar to previous studies, these results indicate that the foreshock activity observed in real catalogues is compatible with the ETAS <span class="hlt">model</span>. Definition of foreshocks with a window method is, however, simplistic, since any individual event may be considered a foreshock although it is impossible to distinguish a foreshock from background or aftershock activity at a one-to-one event basis. We extend our foreshock analysis based on the predictions of the Non-Critical Precursory Accelerating Seismicity Theory (NC PAST), which are: (1) foreshocks are due to overloading on the main fault and occur in clusters, the activity of which is significantly higher than background activity, (2) microseismicity (M<3) must be included for the emergence of a reliable signal and (3) foreshocks are not systematic before large earthquakes due to aleatoric uncertainty on the rupture process. Following these guidelines, we systematically investigate foreshock sequences before large earthquakes (M6+) in Southern California and Italy. Using different approaches, we finally show that significant anomalies are observed before some mainshocks (e.g., 1992 Landers, 2009 L'Aquila earthquakes), which are not explained by the ETAS process. Anomalies are defined as any deviation from a Poissonian distribution (which describes the stationary background seismicity) with a Poisson probability lower than 10^-4. We use approaches such as heuristic (what if a large cluster of events is not preceded by any event large enough to produce such a cluster?), ETAS stochastic declustering and a nearest-neighbour cluster technique that differentiates between foreshocks, mainshocks and aftershocks. Our results highlight the shortcomings of current systematic precursory seismicity analyses: First, in order to consider a sufficient number of mainshocks, a large region is usually considered, which requires the use of a relatively high completeness magnitude. This considerably limits the significance of potential anomalies, which are mostly defined from microseismicity (according to the NC PAST). Second, it is commonly assumed that all mainshocks behave the same (in agreement with the ETAS process), which would validate stacking/averaging over multiple sequences. This approach however fails if mainshocks behave differently from one to another (according to the NC PAST). To conclude, microseismicity and non-systematic presence of anomalies are key conditions to better understand potential foreshocks before large earthquakes, their physical origin and their potential role in time-dependent hazard assessment and earthquake prediction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015JKPS...67.1755Y','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015JKPS...67.1755Y"><span id="translatedtitle"><span class="hlt">Revisiting</span> the difference between traveling-wave and standing-wave thermoacoustic engines - A simple analytical <span class="hlt">model</span> for the standing-wave one</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Yasui, Kyuichi; Kozuka, Teruyuki; Yasuoka, Masaki; Kato, Kazumi</p> <p>2015-11-01</p> <p>There are two major categories in a thermoacoustic prime-mover. One is the traveling-wave type and the other is the standing-wave type. A simple analytical <span class="hlt">model</span> of a standing-wave thermoacoustic prime-mover is proposed at relatively low heat-flux for a stack much shorter than the acoustic wavelength, which approximately describes the Brayton cycle. Numerical simulations of Rott's equations have revealed that the work flow (acoustic power) increases by increasing of the amplitude of the particle velocity (| U|) for the traveling-wave type and by increasing cosΦ for the standing-wave type, where Φ is the phase difference between the particle velocity and the acoustic pressure. In other words, the standing-wave type is a phase-dominant type while the traveling-wave type is an amplitude-dominant one. The ratio of the absolute value of the traveling-wave component (| U|cosΦ) to that of the standing-wave component (| U|sinΦ) of any thermoacoustic engine roughly equals the ratio of the absolute value of the increasing rate of | U| to that of cosΦ. The different mechanism between the traveling-wave and the standing-wave type is discussed regarding the dependence of the energy efficiency on the acoustic impedance of a stack as well as that on ωτα, where ω is the angular frequency of an acoustic wave and τα is the thermal relaxation time. While the energy efficiency of the traveling-wave type at the optimal ωτα is much higher than that of the standing-wave type, the energy efficiency of the standing-wave type is higher than that of the traveling-wave type at much higher ωτα under a fixed temperature difference between the cold and the hot ends of the stack.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012ZaMP...63..373G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012ZaMP...63..373G"><span id="translatedtitle"><span class="hlt">Revisiting</span> total, matric, and osmotic suction in partially saturated geomaterials</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Grasley, Zachary C.; Rajagopal, Kumbakonam R.</p> <p>2012-04-01</p> <p>An accurate quantification of negative pore pressure (commonly referred to as `suction') in the pore network is necessary for <span class="hlt">modeling</span> the mechanical response of unsaturated geomaterials. Traditional definitions and formulations of total, matric, and osmotic suction suggest incorrect pore fluid pressures under certain conditions. In this paper, the notion of suction is <span class="hlt">revisited</span> by deriving an expression for pore fluid pressure in a simple osmotic, capillary tube using the framework of mixture theory in conjunction with the fundamental laws of thermodynamics. Based on the derived expression for the tube, expressions are derived for total, matric, and osmotic suction for partially saturated geomaterials. Particular attention is given to osmotic suction since confusion regarding its mechanisms has apparently contributed to its misapplication in geomechanics. The new expressions derived herein adequately explain behavior that is incorrectly explained by the traditional formulations and unifies two approaches to <span class="hlt">modeling</span> osmotic suction previously considered to be in contradiction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016PrOce.143...13H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016PrOce.143...13H"><span id="translatedtitle">Spawning areas of eastern Baltic cod <span class="hlt">revisited</span>: Using hydrodynamic <span class="hlt">modelling</span> to reveal spawning habitat suitability, egg survival probability, and connectivity patterns</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hinrichsen, H.-H.; Lehmann, A.; Petereit, C.; Nissling, A.; Ustups, D.; Bergström, U.; Hüssy, K.</p> <p>2016-04-01</p> <p>In the highly variable environment of the Baltic Sea two genetically distinct cod stocks exist, one west of the island of Bornholm, which is referred to as the western stock, and one to the east of Bornholm, the eastern stock. A hydrodynamic <span class="hlt">model</span> combined with a Lagrangian particle tracking technique was utilised to provide spatially and temporally resolved long-term information on environmentally-related (i) spawning habitat size, (ii) egg/yolk-sac larval survival, (iii) separation of causes of mortality, and (iv) connectivity between spawning areas of eastern Baltic cod. Simulations were performed to quantify processes generating heterogeneity in spatial distribution of cod eggs and yolk sac larvae up to the first-feeding stage. The spatial extent of cod eggs represented as virtual drifters is primarily determined by oxygen and salinity conditions at spawning, which define the habitat requirement to which cod's physiology is suited for egg development. The highest habitat suitability occurred in the Bornholm Basin, followed by the Gdansk Deep, while relatively low habitat suitability was obtained for the Arkona and the Gotland Basin. During drift egg and yolk sac larval survival is to a large extent affected by sedimentation. Eggs initially released in the western spawning grounds (Arkona and Bornholm Basin) were more affected by sedimentation than those released in the eastern spawning grounds (Gdansk Deep and Gotland Basin). Highest relative survival of eastern Baltic cod eggs occurred in the Bornholm Basin, with a pronounced decrease towards the Gdansk Deep and the Gotland Basin. Relatively low survival rates in the Gdansk Deep and in the Gotland Basin were attributable to oxygen-dependent mortality. Low oxygen content had almost no impact on survival in the Arkona Basin. For all spawning areas temperature dependent mortality was only evident after severe winters. Egg buoyancy in relation to topographic features like bottom sills and strong bottom slopes could appear as a barrier for the transport of Baltic cod eggs and yolk sac larvae and could potentially limit the connectivity of Baltic cod early life stages between the different basins in the western and eastern Baltic Sea. The possibility of an eastward directed transport up to the first-feeding larval stage exists only for eggs and yolk sac larvae at high buoyancy levels, suggesting that dispersal of early life stages between these spawning areas is limited.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1081323','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1081323"><span id="translatedtitle"><span class="hlt">Revisiting</span> Johnson and Jackson boundary conditions for granular flows</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Li, Tingwen; Benyahia, Sofiane</p> <p>2012-07-01</p> <p>In this article, we <span class="hlt">revisit</span> Johnson and Jackson boundary conditions for granular flows. The oblique collision between a particle and a flat wall is analyzed by adopting the classic rigid-body theory and a more realistic semianalytical <span class="hlt">model</span>. Based on the kinetic granular theory, the input parameter for the partial-slip boundary conditions, specularity coefficient, which is not measurable in experiments, is then interpreted as a function of the particle-wall restitution coefficient, the frictional coefficient, and the normalized slip velocity at the wall. An analytical expression for the specularity coefficient is suggested for a flat, frictional surface with a low frictional coefficient. The procedure for determining the specularity coefficient for a more general problem is outlined, and a working approximation is provided.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016ApJ...817L..18K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016ApJ...817L..18K"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Scattering Greenhouse Effect of CO2 Ice Clouds</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kitzmann, D.</p> <p>2016-02-01</p> <p>Carbon dioxide ice clouds are thought to play an important role for cold terrestrial planets with thick CO2 dominated atmospheres. Various previous studies showed that a scattering greenhouse effect by carbon dioxide ice clouds could result in a massive warming of the planetary surface. However, all of these studies only employed simplified two-stream radiative transfer schemes to describe the anisotropic scattering. Using accurate radiative transfer <span class="hlt">models</span> with a general discrete ordinate method, this study <span class="hlt">revisits</span> this important effect and shows that the positive climatic impact of carbon dioxide clouds was strongly overestimated in the past. The revised scattering greenhouse effect can have important implications for the early Mars, but also for planets like the early Earth or the position of the outer boundary of the habitable zone.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013APS..DFDR34002D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013APS..DFDR34002D"><span id="translatedtitle">The flow along an external corner <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Denier, Jim; Jewell, Nathaniel</p> <p>2013-11-01</p> <p>We <span class="hlt">revisit</span> the problem of the flow of an almost inviscid fluid along an external corner made from the junction of two quarter infinite plates joined at an angle 0 < α < π / 2 . The structure of the boundary layer which develops along the corner is explored using a computational approach based upon a spectral element discretisation of the steady two-dimensional boundary-layer equations. We pay particular attention to the case when the angle α is small, thus approximating the semi-infinte quarter plate problem considered by Stewartson (1961) and recently <span class="hlt">revisited</span> by Duck & Hewitt (2012). Our results, which demonstrate a thickening of the boundary-layer near the sharp corner, will be discussed in the context of the asymptotic theory developed in the aforementioned papers.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/12645611','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/12645611"><span id="translatedtitle"><span class="hlt">Revisiting</span> the definition of homo sapiens.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Loike, John D; Tendler, Moshe D</p> <p>2002-12-01</p> <p>Research in genomics, human cloning, and transgenic technology has challenged bioethicists and scientists to rethink the definition of human beings as a species. For example, should the definition incorporate a genetic criterion and how does the capacity to genetically engineer human beings affect the definition of our species? In considering these contemporary bioethical dilemmas, we <span class="hlt">revisit</span> an ancient source, the Talmud, and highlight how it provides specific biological, cultural, and genetic criteria to define the human species. PMID:12645611</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2005NuPhB.710....3D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2005NuPhB.710....3D"><span id="translatedtitle">Supersymmetric standard <span class="hlt">model</span> spectra from RCFT orientifolds</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Dijkstra, T. P. T.; Huiszoon, L. R.; Schellekens, A. N.</p> <p>2005-03-01</p> <p>We present supersymmetric, tadpole-free d=4,N=1 orientifold vacua with a three family chiral fermion spectrum that is identical to that of the standard <span class="hlt">model</span>. Starting with all simple current orientifolds of all <span class="hlt">Gepner</span> <span class="hlt">models</span> we perform a systematic search for such spectra. We consider several variations of the standard four-stack intersecting brane realization of the standard <span class="hlt">model</span>, with all quarks and leptons realized as bifundamentals and perturbatively exact baryon and lepton number symmetries, and with a U(1 vector boson that does not acquire a mass from Green-Schwarz terms. The number of supersymmetric Higgs pairs H+H is left free. In order to cancel all tadpoles, we allow a "hidden" gauge group, which must be chirally decoupled from the standard <span class="hlt">model</span>. We also allow for non-chiral mirror-pairs of quarks and leptons, non-chiral exotics and (possibly chiral) hidden, standard <span class="hlt">model</span> singlet matter, as well as a massless B-L vector boson. All of these less desirable features are absent in some cases, although not simultaneously. In particular, we found cases with massless Chan-Paton gauge bosons generating nothing more than SU(3)×SU(2)×U(1). We obtain almost 180 000 rationally distinct solutions (not counting hidden sector degrees of freedom), and present distributions of various quantities. We analyse the tree level gauge couplings, and find a large range of values, remarkably centered around the unification point.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/CFR-2014-title42-vol5/pdf/CFR-2014-title42-vol5-sec488-30.pdf','CFR2014'); return false;" href="https://www.gpo.gov/fdsys/pkg/CFR-2014-title42-vol5/pdf/CFR-2014-title42-vol5-sec488-30.pdf"><span id="translatedtitle">42 CFR 488.30 - <span class="hlt">Revisit</span> user fee for <span class="hlt">revisit</span> surveys.</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collectionCfr.action?selectedYearFrom=2014&page.go=Go">Code of Federal Regulations, 2014 CFR</a></p> <p></p> <p>2014-10-01</p> <p>... SERVICES (CONTINUED) STANDARDS AND CERTIFICATION SURVEY, CERTIFICATION, AND ENFORCEMENT PROCEDURES General... subject to user fees unless otherwise exempted. <span class="hlt">Revisit</span> survey means a survey performed with respect to a... substantiated complaint survey and that is designed to evaluate the extent to which...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012PhRvD..85l3508M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012PhRvD..85l3508M"><span id="translatedtitle"><span class="hlt">Revisiting</span> cosmic no-hair theorem for inflationary settings</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Maleknejad, A.; Sheikh-Jabbari, M. M.</p> <p>2012-06-01</p> <p>In this work we <span class="hlt">revisit</span> Wald’s cosmic no-hair theorem [R. M. Wald, Phys. Rev. DPRVDAQ0556-2821 28, 2118 (1983).10.1103/PhysRevD.28.2118] in the context of accelerating Bianchi cosmologies for a generic cosmic fluid with nonvanishing anisotropic stress tensor and when the fluid energy-momentum tensor is of the form of a cosmological constant term plus a piece which does not respect strong or dominant energy conditions. Such a fluid is the one appearing in inflationary <span class="hlt">models</span>. We show that for such a system anisotropy may grow, in contrast to the cosmic no-hair conjecture. In particular, for a generic inflationary <span class="hlt">model</span> we show that there is an upper bound on the growth of anisotropy. For slow-roll inflationary <span class="hlt">models</span>, our analysis can be refined further and the upper bound is found to be of the order of slow-roll parameters. We examine our general discussions and our extension of Wald’s theorem for three classes of slow-roll inflationary <span class="hlt">models</span>, generic multiscalar field driven <span class="hlt">models</span>, anisotropic <span class="hlt">models</span> involving U(1) gauge fields and the gauge-flation scenario.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013AGUFM.S43A2498S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013AGUFM.S43A2498S"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Source Process of the 2007 Tocopilla, Chile Earthquake</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Simons, M.; Minson, S. E.; Jolivet, R.; Jiang, J.; Beck, J. L.</p> <p>2013-12-01</p> <p>We <span class="hlt">revisit</span> the 2007 Mw 7.7 Tocopilla, Chile earthquake to create a finite fault kinematic source <span class="hlt">model</span> based on the current best practices in data analysis and inversion methods. The data used to constrain the source <span class="hlt">model</span> include both static GPS offsets and 1 Hz kinematic GPS time series, as well as interferograms which have been reanalyzed to remove tropospheric effects which can be quite significant in this region. Our inversion methodology is a Bayesian approach that uses only physics-based constraints on the rupture evolution, and which utilizes <span class="hlt">models</span> of both the observational noise and the errors in our forward <span class="hlt">model</span> to obtain the ensemble of all plausible rupture <span class="hlt">models</span> which satisfy both the data and our a priori assumptions. This approach allows us to better understand which parts of the rupture process are well-constrained and which are not, and thus to better understand how the 2007 Tocopilla, Chile earthquake rupture fits into the sequence of large earthquakes which have been mosaicking the northern Chile subduction zone.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/11341012','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/11341012"><span id="translatedtitle">Storage coefficient <span class="hlt">revisited</span>: is purely vertical strain a good assumption?</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Burbey, T J</p> <p>2001-01-01</p> <p>The storage coefficient that is used ubiquitously today was first defined by the analytical work of Theis and Jacob over a half-century ago. Inherent within this definition is the restriction of purely vertical compression of the aquifer during a reduction in pressure. The assumption is <span class="hlt">revisited</span> and quantitatively evaluated by comparing numerical results using both one- and three-dimensional strain <span class="hlt">models</span> in the presence of three-dimensional flow. Results indicate that (1) calculated hydraulic head values are nearly identical for both <span class="hlt">models</span>; (2) the release of water from storage in terms of volume strain is nearly identical for both <span class="hlt">models</span> and that the location of maximum production moves outward from the well as a function of time; (3) the vertical strain components are markedly different with at least 50% of the total volume of water pumped originating from horizontal strain (and increasing to as much as 70%); and (4) for the one-dimensional strain <span class="hlt">model</span> to yield the necessary quantity of water to the pumped well, the resulting vertical compaction (land subsidence) is as much as four times greater and vertical strain is as much as 60% greater than the three-dimensional strain <span class="hlt">model</span>. Results indicate that small changes in porosity resulting from horizontal strain can yield extremely large quantities of water to the pumping well. This study suggests that the assumption of purely vertical strain used in the definition of the storage coefficient is not valid. PMID:11341012</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012PhRvD..86a3001A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012PhRvD..86a3001A"><span id="translatedtitle"><span class="hlt">Revisiting</span> the naturalness problem: Who is afraid of quadratic divergences?</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Aoki, Hajime; Iso, Satoshi</p> <p>2012-07-01</p> <p>It is widely believed that quadratic divergences severely restrict natural constructions of particle physics <span class="hlt">models</span> beyond the standard <span class="hlt">model</span> (SM). Supersymmetry provides a beautiful solution, but the recent LHC experiments have excluded large parameter regions of supersymmetric extensions of the SM. It will now be important to reconsider whether we have been misinterpreting the quadratic divergences in field theories. In this paper, we <span class="hlt">revisit</span> the problem from the viewpoint of the Wilsonian renormalization group and argue that quadratic divergences—which can always be absorbed into a position of the critical surface—should be simply subtracted in <span class="hlt">model</span> constructions. Such a picture gives another justification to the argument [W. A. Bardeen, Report No. FERMILAB-CONF-95-391-T] that the scale invariance of the SM, except for the soft-breaking terms, is an alternative solution to the naturalness problem. It also largely broadens possibilities of <span class="hlt">model</span> constructions beyond the SM since we just need to take care of logarithmic divergences, which cause mixings of various physical scales and runnings of couplings.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/1159296','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/1159296"><span id="translatedtitle">Orthorhombic Zr2Co11 phase <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Li, X. -Z.; Zhang, W. Y.; Sellmyer, D. J.; Zhao, X.; Nguyen, M. C.; Wang, C. Z.; Ho, K. M.</p> <p>2014-10-01</p> <p>The structure of the orthorhombic Zr2Co11 phase was <span class="hlt">revisited</span> in the present work. Selected-area electron diffraction (SAED) and high-resolution electron microscopy (HREM) techniques were used to investigate the structure. They show the orthorhombic Zr2Co11 phase has a 1-D incommensurate modulated structure. The structure can be approximately described as a B-centered orthorhombic lattice. The lattice parameters of the orthorhombic Zr2Co11 phase have been determined by a tilt series of SAED patterns. A hexagonal network with a modulation wave has been observed in the HREM image and the hexagonal motif is considered as the basic structural unit.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1044922','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1044922"><span id="translatedtitle">Sloan Digital Sky Survey Photometric Calibration <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Marriner, John; /Fermilab</p> <p>2012-06-29</p> <p>The Sloan Digital Sky Survey calibration is <span class="hlt">revisited</span> to obtain the most accurate photometric calibration. A small but significant error is found in the flat-fielding of the Photometric telescope used for calibration. Two SDSS star catalogs are compared and the average difference in magnitude as a function of right ascension and declination exhibits small systematic errors in relative calibration. The photometric transformation from the SDSS Photometric Telescope to the 2.5 m telescope is recomputed and compared to synthetic magnitudes computed from measured filter bandpasses.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003ASPC..288..130W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003ASPC..288..130W"><span id="translatedtitle">NLTE in a Hot Hydrogen Star: Auer & Mihalas <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Wiersma, J.; Rutten, R. J.; Lanz, T.</p> <p>2003-01-01</p> <p>We pay tribute to two landmark papers published by Auer & Mihalas in 1969. They <span class="hlt">modeled</span> hot-star NLTE-RE hydrogen-only atmospheres, using two simplified hydrogen atoms: ApJ 156, 157: H I levels 1, 2 and c, Lyman α the only line ApJ 156, 681: H I levels 1, 2, 3 and c, Balmer α the only line and computed LTE and NLTE <span class="hlt">models</span> with the single line turned on and off. The results were extensively analyzed in the two papers. Any student of stellar line formation should take these beautiful papers to heart. The final exercise in Rutten's lecture notes ``Radiative Transfer in Stellar Atmospheres'' asks the student to work through five pages of questions concerning diagrams from the first paper alone! That exercise led to the present work in which we recompute the Auer-Mihalas hot-hydrogen-star <span class="hlt">models</span> with TLUSTY, adding results from a complete hydrogen atom for comparison. Our motivation for this Auer-Mihalas <span class="hlt">re-visitation</span> is twofold: 1. to add diagnostic diagrams to the ones published by Auer & Mihalas, in particular Bν, Jν, Sν graphs to illustrate the role of the radiation field, and radiative heating & cooling graphs to illustrate the radiative energy budget, 2. to see the effect of adding the rest of the hydrogen atom.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li class="active"><span>19</span></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_19 --> <div id="page_20" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li class="active"><span>20</span></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="381"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/18369284','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/18369284"><span id="translatedtitle">Kaolin polytypes <span class="hlt">revisited</span> ab initio.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Mercier, Patrick H J; Le Page, Yvon</p> <p>2008-04-01</p> <p>The well known 36 distinguishable transformations between adjacent kaolin layers are split into 20 energetically distinguishable transformations (EDT) and 16 enantiomorphic transformations, hereafter denoted EDT*. For infinitesimal energy contribution of interactions between non-adjacent layers, the lowest-energy <span class="hlt">models</span> must result from either (a) repeated application of an EDT or (b) alternate application of an EDT and its EDT*. All <span class="hlt">modeling</span>, quantum input preparation and interpretation was performed with Materials Toolkit, and quantum optimizations with VASP. Kaolinite and dickite are the lowest-energy <span class="hlt">models</span> at zero temperature and pressure, whereas nacrite and HP-dickite are the lowest-enthalpy <span class="hlt">models</span> under moderate pressures based on a rough enthalpy/pressure graph built from numbers given in the supplementary tables. Minor temperature dependence of this calculated 0 K graph would explain the bulk of the current observations regarding synthesis, diagenesis and transformation of kaolin minerals. Other stackings that we list have energies so competitive that they might crystallize at ambient pressure. A homometric pair of energetically distinguishable ideal <span class="hlt">models</span>, one of them for nacrite, is exposed. The printed experimental structure of nacrite correctly corresponds to the stable member of the pair. In our opinion, all recent literature measurements of the free energy of bulk kaolinite are too negative by approximately 15 kJ mol(-1) for some unknown reason. PMID:18369284</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/21574626','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/21574626"><span id="translatedtitle"><span class="hlt">REVISITING</span> THE THERMAL STABILITY OF RADIATION-DOMINATED THIN DISKS</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Zheng Shengming; Gu Weimin; Lu Jufu; Yuan Feng</p> <p>2011-05-01</p> <p>The standard thin disk <span class="hlt">model</span> predicts that when the accretion rate is over a small fraction of the Eddington rate, which corresponds to L {approx}> 0.06 L{sub Edd}, the inner region of the disk is radiation-pressure dominated and thermally unstable. However, observations of the high/soft state of black hole X-ray binaries with luminosity well within this regime (0.01L{sub Edd} {approx}< L {approx}< 0.5L{sub Edd}) indicate that the disk has very little variability, i.e., it is quite stable. Recent radiation magnetohydrodynamic simulations of a vertically stratified shearing box have confirmed the absence of the thermal instability. In this paper, we <span class="hlt">revisit</span> the thermal stability by linear analysis, taking into account the role of magnetic field in the accretion flow. By assuming that the field responds negatively to a positive temperature perturbation, we find that the threshold of accretion rate above which the disk becomes thermally unstable increases significantly compared with the case of not considering the role of magnetic field. This accounts for the stability of the observed sources with high luminosities. Our <span class="hlt">model</span> also presents a possible explanation as to why only GRS 1915+105 seems to show thermally unstable behavior. This peculiar source holds the highest accretion rate (or luminosity) among the known high state sources, which is well above the accretion rate threshold of the instability.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009AGUFM.G51C..06T','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009AGUFM.G51C..06T"><span id="translatedtitle">Changes in Sea Levels around the British Isles <span class="hlt">Revisited</span> (Invited)</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Teferle, F. N.; Hansen, D. N.; Bingley, R. M.; Williams, S. D.; Woodworth, P. L.; Gehrels, W. R.; Bradley, S. L.; Stocchi, P.</p> <p>2009-12-01</p> <p>Recently a number of new and/or updated sources for estimates of vertical land movements for the British Isles have become available allowing the relative and average changes in sea levels for this region to be <span class="hlt">revisited</span>. The geodetic data set stems from a combination of re-processed continuous Global Positioning System (GPS) measurements from stations in the British Isles and from a global reference frame network, and absolute gravity (AG) measurements from two stations in the British Isles. The geologic data set of late Holocene sea level indicators has recently been updated, now applying corrections for the 20th century sea level rise, syphoning effect and late Holocene global ice melt, and expanded to Northern Ireland and Ireland. Several new <span class="hlt">model</span> predictions of the glacial isostatic adjustment (GIA) process active in this region form the <span class="hlt">modelling</span> data set of vertical land movements for the British Isles. Correcting the updated revised local reference (RLR) trends from the Permanent Service for Mean Sea Level (PSMSL) with these vertical land movement data sets, regional and averaged changes in sea levels around the British Isles have been investigated. Special focus is thereby also given to the coastal areas that have recently been identified within the UK Climate Projections 2009.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2174943','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2174943"><span id="translatedtitle"><span class="hlt">Revisiting</span> interaction in knowledge translation</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Ginsburg, Liane R; Lewis, Steven; Zackheim, Lisa; Casebeer, Ann</p> <p>2007-01-01</p> <p>Background Although the study of research utilization is not new, there has been increased emphasis on the topic over the recent past. Science push <span class="hlt">models</span> that are researcher driven and controlled and demand pull <span class="hlt">models</span> emphasizing users/decision-maker interests have largely been abandoned in favour of more interactive <span class="hlt">models</span> that emphasize linkages between researchers and decisionmakers. However, despite these and other theoretical and empirical advances in the area of research utilization, there remains a fundamental gap between the generation of research findings and the application of those findings in practice. Methods Using a case approach, the current study looks at the impact of one particular interaction approach to research translation used by a Canadian funding agency. Results Results suggest there may be certain conditions under which different levels of decisionmaker involvement in research will be more or less effective. Four attributes are illuminated by the current case study: stakeholder diversity, addressability/actionability of results, finality of study design and methodology, and politicization of results. Future research could test whether these or other variables can be used to specify some of the conditions under which different approaches to interaction in knowledge translation are likely to facilitate research utilization. Conclusion This work suggests that the efficacy of interaction approaches to research translation may be more limited than current theory proposes and underscores the need for more completely specified <span class="hlt">models</span> of research utilization that can help address the slow pace of change in this area. PMID:17971208</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=CREST&pg=3&id=EJ195828','ERIC'); return false;" href="http://eric.ed.gov/?q=CREST&pg=3&id=EJ195828"><span id="translatedtitle">Counseling Delinquents: Dual Treatment <span class="hlt">Revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Lee, Robert; Haynes, Nancy M.</p> <p>1978-01-01</p> <p>The results of four studies conducted to measure the effectiveness of Clinical Rehabilitation Support Teams (Project CREST) are summarized. Professional counseling was provided to delinquent youths, as were regular probation services--a dual-treatment <span class="hlt">model</span>. Studies indicate that clients in the CREST program have consistently shown decreased</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Sick&pg=3&id=EJ830530','ERIC'); return false;" href="http://eric.ed.gov/?q=Sick&pg=3&id=EJ830530"><span id="translatedtitle">The Medical Excuse Game <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Corson-Rikert, Janet; Christmas, William A.</p> <p>2009-01-01</p> <p>Academic policies that require medical excuses are based on mistrust of students and conflict with institutional honor codes. Such policies undermine the philosophical and educational foundations of higher education; namely, to <span class="hlt">model</span> and nurture honesty, integrity, and citizenship in emerging adults. Instead, they encourage hypocrisy and…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/21668217','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/21668217"><span id="translatedtitle">Long, cold, early r process? Neutrino-induced nucleosynthesis in He shells <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Banerjee, Projjwal; Haxton, W C; Qian, Yong-Zhong</p> <p>2011-05-20</p> <p>We <span class="hlt">revisit</span> a ν-driven r-process mechanism in the He shell of a core-collapse supernova, finding that it could succeed in early stars of metallicity Z ≲ 10⁻³ Z(⊙), at relatively low temperatures and neutron densities, producing A ~ 130 and 195 abundance peaks over ~10-20 s. The mechanism is sensitive to the ν emission <span class="hlt">model</span> and to ν oscillations. We discuss the implications of an r process that could alter interpretations of abundance data from metal-poor stars, and point out the need for further calculations that include effects of the supernova shock. PMID:21668217</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/21653915','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/21653915"><span id="translatedtitle">Silent cries, dancing tears: the metapsychology of art <span class="hlt">revisited</span>/revised.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Aragno, Anna</p> <p>2011-04-01</p> <p>Against the backdrop of a broad survey of the literature on applied psychoanalysis, a number of concepts underpinning the metapsychology of art are <span class="hlt">revisited</span> and revised: sublimation; interrelationships between primary and secondary processes; symbolization; "fantasy"; and "cathexis." Concepts embedded in dichotomous or drive/energic contexts are examined and reformulated in terms of a continuum of semiotic processes. Freudian dream structure is viewed as a biological/natural template for nonrepressive artistic forms of sublimation. The synthesis presented proposes a <span class="hlt">model</span> of continuous rather than discontinuous processes, in a nonenergic, biosemiotic metatheoretical framework. PMID:21653915</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016MNRAS.455.4512R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016MNRAS.455.4512R"><span id="translatedtitle">Slowly rotating homogeneous masses <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Reina, Borja</p> <p>2016-02-01</p> <p>Hartle's <span class="hlt">model</span> for slowly rotating stars has been extensively used to compute equilibrium configurations of slowly rotating stars to second order in perturbation theory in general relativity, given a barotropic equation of state. A recent study based on the modern theory of perturbed matchings concludes that the functions in the (first and second order) perturbation tensors can always be taken as continuous at the surface of the star, except for the second-order function m0. This function presents a jump at the surface of the star proportional to the discontinuity of the energy density there. This concerns only a particular outcome of the <span class="hlt">model</span>: the change in mass δM. In this paper, the amended change in mass is calculated for the case of constant density stars.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=19900027057&hterms=polska&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dpolska','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=19900027057&hterms=polska&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dpolska"><span id="translatedtitle">The deep planetary magnetotail <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Macek, Wieslaw M.</p> <p>1989-01-01</p> <p>The magnetotail <span class="hlt">model</span> of Grzedzielski and Macek (1988) is extended to great distances in the antisolar direction. For typical solar wind parameters at 1 AU and the most probable set of parameters of the <span class="hlt">model</span> as determined for the ISEE-3 region of 200 earth radii, R(E), the open geotail extends to at least 3000 - 4000 R(E) downstream from earth, where it forms a cavity filled with a dense hot plasma and low magnetic field strengths. The cross section of this cavity in the plane perpendicular to the earth-sun line has dimensions of 300 - 400 R(E) parallel to the ecliptic plane, but only 5 R(E) in the direction normal to the ecliptic. It seems likely that the magnetotail would become filamentary at such distances.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/21503583','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/21503583"><span id="translatedtitle"><span class="hlt">Revisit</span> of cosmic age problem</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Wang Shuang; Li Xiaodong; Li Miao</p> <p>2010-11-15</p> <p>We investigate the cosmic age problem associated with 9 extremely old globular clusters in M31 galaxy and 1 very old high-z quasar automatic plate-measuring machine 08279+5255 at z=3.91. These 9 globular clusters have not been used to study the cosmic age problem in the previous literature. By evaluating the age of the Universe in the {Lambda} cold dark matter <span class="hlt">model</span> with the observational constraints from the Type Ia supernovae, the baryon acoustic oscillations, the cosmic microwave background, and the independent H{sub 0} measurements, we find that the existence of 5 globular clusters and 1 high-z quasar are in tension (over 2{sigma} confidence level) with the current cosmological observations. So if the age estimates of these objects are correct, the cosmic age puzzle still remains in the standard cosmology. Moreover, we extend our investigations to the cases of the interacting dark energy <span class="hlt">models</span>. It is found that although the introduction of the interaction between dark sectors can give a larger cosmic age, the interacting dark energy <span class="hlt">models</span> still have difficulty to pass the cosmic age test.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4231082','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4231082"><span id="translatedtitle">Risk Prediction of Emergency Department <span class="hlt">Revisit</span> 30 Days Post Discharge: A Prospective Study</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Hao, Shiying; Jin, Bo; Shin, Andrew Young; Zhao, Yifan; Zhu, Chunqing; Li, Zhen; Hu, Zhongkai; Fu, Changlin; Ji, Jun; Wang, Yong; Zhao, Yingzhen; Dai, Dorothy; Culver, Devore S.; Alfreds, Shaun T.; Rogow, Todd; Stearns, Frank; Sylvester, Karl G.; Widen, Eric; Ling, Xuefeng B.</p> <p>2014-01-01</p> <p>Background Among patients who are discharged from the Emergency Department (ED), about 3% return within 30 days. <span class="hlt">Revisits</span> can be related to the nature of the disease, medical errors, and/or inadequate diagnoses and treatment during their initial ED visit. Identification of high-risk patient population can help device new strategies for improved ED care with reduced ED utilization. Methods and Findings A decision tree based <span class="hlt">model</span> with discriminant Electronic Medical Record (EMR) features was developed and validated, estimating patient ED 30 day <span class="hlt">revisit</span> risk. A retrospective cohort of 293,461 ED encounters from HealthInfoNet (HIN), Maine's Health Information Exchange (HIE), between January 1, 2012 and December 31, 2012, was assembled with the associated patients' demographic information and one-year clinical histories before the discharge date as the inputs. To validate, a prospective cohort of 193,886 encounters between January 1, 2013 and June 30, 2013 was constructed. The c-statistics for the retrospective and prospective predictions were 0.710 and 0.704 respectively. Clinical resource utilization, including ED use, was analyzed as a function of the ED risk score. Cluster analysis of high-risk patients identified discrete sub-populations with distinctive demographic, clinical and resource utilization patterns. Conclusions Our ED 30-day <span class="hlt">revisit</span> <span class="hlt">model</span> was prospectively validated on the Maine State HIN secure statewide data system. Future integration of our ED predictive analytics into the ED care work flow may lead to increased opportunities for targeted care intervention to reduce ED resource burden and overall healthcare expense, and improve outcomes. PMID:25393305</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2557748','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2557748"><span id="translatedtitle">Influenza A virus recycling <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Dowdle, W. R.</p> <p>1999-01-01</p> <p>Current textbooks link influenza pandemics to influenza A virus subtypes H2 (1889-91), H3 (1990), H1 (1918-20), H2 (1957-58) and H3 (1968), a pattern suggesting subtype recycling in humans. Since H1 reappeared in 1977, whatever its origin, some workers feel that H2 is the next pandemic candidate. This report reviews the publications on which the concept of influenza A virus subtype recycling is based and concludes that the data are inconsistent with the purported sequence of events. The three influenza pandemics prior to 1957-58 were linked with subtypes through retrospective studies of sera from the elderly, or through seroarchaeology. The pandemic seroarchaeological <span class="hlt">model</span> for subtype H1 has been validated by the recent recovery of swine virus RNA fragments from persons who died from influenza in 1918. Application of the <span class="hlt">model</span> to pre-existing H3 antibody among the elderly links the H3 subtype to the pandemic of 1889-91, not that of 1900 as popularly quoted. Application of the <span class="hlt">model</span> to pre-existing H2 antibody among the elderly fails to confirm that this subtype caused a pandemic in the late 1800's, a finding which is consistent with age-related excess mortality patterns during the pandemics of 1957 (H2) and 1968 (H3). H2 variants should be included in pandemic planning for a number of reasons, but not because of evidence of recycling. It is not known when the next pandemic will occur or which of the 15 (or more) haemagglutinin subtypes will be involved. Effective global surveillance remains the key to influenza preparedness. PMID:10593030</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010AdSpR..46..310D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010AdSpR..46..310D"><span id="translatedtitle">Venus atmospheric platform options <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Dorrington, G. E.</p> <p>2010-08-01</p> <p>Various balloon systems intended as scientific platforms to float in the atmosphere of Venus at altitudes between about 35 and 65 km are briefly reviewed. Previous predictions of the altitude oscillations of balloons filled with helium gas and water vapor are largely confirmed through numerical simulation and analysis. The need for refined thermal <span class="hlt">modelling</span> is emphasised. Several novel technical concepts are introduced. It is concluded that phase change balloons would be more suitable than non-condensing super pressure gas balloons when repeated altitude excursions are a mission requirement.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/21227915','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/21227915"><span id="translatedtitle">Pathogenesis of progressive multifocal leukoencephalopathy--<span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>White, Martyn K; Khalili, Kamel</p> <p>2011-03-01</p> <p>Progressive multifocal leukoencephalopathy (PML) is a demyelinating disease of the central nervous system that is rare even though the proven etiological agent of PML, the polyomavirus JC (JC virus), is ubiquitous within the human population. The common feature of PML cases appears to be underlying immunosuppression, and PML has gained clinical visibility because of its association with human immunodeficiency virus and AIDS and its occurrence as a side effect of certain immunomodulatory drugs. A hypothesis has gained general acceptance that JC virus causes a primary infection in childhood and enters a latent state, after which immunosuppression allows viral reactivation leading to PML. Nonetheless, many important aspects of PML pathogenesis remain unclear, including the molecular bases of latency and reactivation, the site(s) of latency, the relationship of archetype and prototype virus and the mode of virus transmission within the body and between individuals. In this review, we will <span class="hlt">revisit</span> these areas and examine what the available evidence suggests. PMID:21227915</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2004JASTP..66..949H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2004JASTP..66..949H"><span id="translatedtitle">The Doppler spread theory and parameterization <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hines, Colin O.</p> <p>2004-07-01</p> <p>The author's earlier Doppler Spread Theory (DST) and Doppler Spread Parameterization (DSP) are <span class="hlt">revisited</span> with a new understanding of the dichotomous roles played by nonlinearity in Eulerian and Lagrangian coordinates, respectively. An embryo Lagrangian DST is introduced and employed to assess the original DST. Earlier results near the Eulerian spectral peak are found to be reasonably valid, whereas those at greater vertical wavenumber are confirmed to have produced too much spreading. The earlier DSP is found to need little if any change, though specific values are suggested for its two most important ``fudge factors''. In a more general context, the continuing identity of a wave undergoing certain nonlinear interactions with other waves is discussed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016JAHH...19...18G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016JAHH...19...18G"><span id="translatedtitle">Seasonal dating of Sappho's "Midnight Poem" <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Cuntz, Manfred; Gurdemir, Levent; George, Martin</p> <p>2016-04-01</p> <p>Sappho was a Greek lyric poet who composed a significant array of pristine poetry. Although much of it has been lost, her reputation has endured thanks to numerous surviving fragments. One of her contributions includes the so-called 'Midnight Poem', which contains a line about the Pleiades, setting sometime before midnight, and supposedly observed from the island of Lesbos. This poem also refers to the setting of the Moon. Sappho's Midnight Poem thus represents a prime example of where ancient poetry and astronomy merge, and it also offers the possibility of seasonal dating. Previously, Herschberg and Mebius (1990) estimated that the poem was composed in late winter/early spring, a time frame that is not unusual for lyrics of an amorous nature. The aim of our paper is to <span class="hlt">revisit</span> this earlier finding by using modern-day software. Our study confirms Herschberg and Mebius' result, but also conveys further information.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/21607926','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/21607926"><span id="translatedtitle">Visser's massive graviton bimetric theory <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Roany, Alain de; Chauvineau, Bertrand; Freitas Pacheco, Jose A. de</p> <p>2011-10-15</p> <p>A massive gravity theory was proposed by Visser in the late 1990s. This theory, based on a background metric b{sub {alpha}{beta}} and on an usual dynamical metric g{sub {alpha}{beta}} has the advantage of being free of ghosts as well as discontinuities present in other massive theories proposed in the past. In the present investigation, the equations of Visser's theory are <span class="hlt">revisited</span> with particular care on the related conservation laws. It will be shown that a multiplicative factor is missing in the graviton tensor originally derived by Visser, which has no incidence on the weak field approach but becomes important in the strong field regime when, for instance, cosmological applications are considered. In this case, contrary to some previous claims found in the literature, we conclude that a nonstatic background metric is required in order to obtain a solution able to mimic the {Lambda}CDM cosmology.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015APS..DFDD26003S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015APS..DFDD26003S"><span id="translatedtitle">Biofluiddynamics of balistiform and gymnotiform locomotion: <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sprinkle, Brennan; Bale, Rahul; Singh, Amneet; Chen, Nelson; Maciver, Malcom; Patankar, Neelesh</p> <p>2015-11-01</p> <p>Gymnotiform and balistiform swimmers are those which have an undulatory fin affixed to a rigid body unlike anguilliforms who undulate their entire body. Is there a mechanical advantage to gymnotiform and balistiform swimming? This question was investigated by Lighthill & Blake in a four paper series Biofluiddynamics of balistiform and gymnotiform locomotion. We <span class="hlt">revisit</span> this work using fully resolved numerical simulations of the types of swimmers considered by Lighthill & Blake to interrogate the issue of mechanical advantage for rigid body swimmers. In doing so, we find that while there is advantage to rigid body swimming, the mechanism of `momentum enhancement,' proposed by Lighthill and Blake, is not the cause. Further, we use our results and simulations to explain why some gymnotiform and balistiform swimmers have their propulsor attached to their bodies at an angle. This work was supported in part by NSF grants CBET-0828749, CMMI-0941674 and CBET-1066575. Computational resources were provided by Northwestern University High Performance Computing System-Quest.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25515178','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25515178"><span id="translatedtitle">Seeing the unseen: Charles Bonnet syndrome <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Nair, Aditya Gopinathan; Nair, Akshay Gopinathan; Shah, Bharat R; Gandhi, Rashmin Anilkumar</p> <p>2015-09-01</p> <p>Charles Bonnet syndrome (CBS) is a rare condition that encompasses three clinical features: complex visual hallucinations, ocular pathology causing visual deterioration, and preserved cognitive status. Common associated ocular pathologies include age-related macular degeneration, glaucoma, and cataracts. Several theories have been proposed to try to explain the visual hallucinations. However, the pathophysiology remains poorly understood, and treatment is largely based on anecdotal data. The lack of awareness of CBS among medical professionals often leads to inappropriate diagnosis and medication. In a country like India, where awareness of mental health is not widespread, cultural myths and stigma prevent patients from seeking professional help. Here we describe two cases of CBS and <span class="hlt">revisit</span> different ocular morbidities that have been reported to occur in conjunction with CBS. Psychiatrists and ophthalmologists alike must be sensitive to this clinical condition to ensure prompt diagnosis and treatment. PMID:25515178</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li class="active"><span>20</span></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_20 --> <div id="page_21" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li class="active"><span>21</span></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="401"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015GeoRL..42.8758P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015GeoRL..42.8758P"><span id="translatedtitle"><span class="hlt">Revisiting</span> ice nucleation from precipitation samples</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Petters, M. D.; Wright, T. P.</p> <p>2015-10-01</p> <p>An emerging and unsolved question is the sensitivity of cloud processes, precipitation, and climate to the atmospheric ice nucleus spectrum. This work <span class="hlt">revisits</span> estimation of atmospheric ice-nucleating particle concentration derived from cloud water and precipitation samples representing a wide range of geographical locations, seasons, storm systems, precipitation types, instruments, concentrations, and temperatures. Concentrations of ice-nucleating particles are shown to vary over 10 orders of magnitude. High variability is observed in the -5°C to -12°C range which is suggested to be biologically derived nuclei whose life cycle is associated with intermittent source and efficient sink processes. The highest ever observed nucleus concentrations at -8°C are 3 orders of magnitude lower than observed ice crystal concentrations in tropical cumuli at the same temperature. The observed upper and lower limits of the nucleus spectrum provide a possible constraint on minimum enhancement factors for secondary ice formation processes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2004tssf.book...37F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2004tssf.book...37F"><span id="translatedtitle">Linear stability of a vortex ring <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Fukumoto, Yasuhide; Hattori, Yuji</p> <p></p> <p>We <span class="hlt">revisit</span> the stability of an elliptically strained vortex and a thin axisymmetric vortex ring, embedded in an inviscid incompressible fluid, to three-dimensional disturbances of infinitesimal amplitude. The results of Tsai & Widnall (1976) for an elliptically strained vortex are simplified by providing an explicit expression for the disturbance flow field. A direct relation is established with the elliptical instability. For Kelvin's vortex ring, the primary perturbation to the Rankine vortex is a dipole field. We show that the dipole field causes a parametric resonance instability between axisymmetric and bending waves at intersection points of the dispersion curves. It is found that the dipole effect predominates over the straining effect for a very thin core. The mechanism is attributable to stretching of the disturbance vortex lines in the toroidal direction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011PhFl...23h2103R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011PhFl...23h2103R"><span id="translatedtitle">Thermocapillary instabilities in liquid bridges <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ryzhkov, Ilya I.</p> <p>2011-08-01</p> <p>The study of convective thermocapillary instabilities in liquid bridges [J. J. Xu and S. H. Davis, Phys. Fluids 27(5), 1102 (1984)] is <span class="hlt">revisited</span>. A new branch of neutral mode m = 1 is found. The previously reported results are confirmed in the range of low Prandtl numbers. It is shown that for large Prandtl numbers, the flow becomes unstable at much smaller values of the Marangoni number than it was reported previously. The calculations are performed for adiabatic and heat conductive free surface. In both cases, the critical mode is m = 1. The previously reported change of critical mode from m = 1 to m = 0 with increasing the Prandtl number is not confirmed. The corrected results provide a better agreement with the experimental data.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016JAHH...19...18C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016JAHH...19...18C"><span id="translatedtitle">Seasonal dating of Sappho's 'Midnight Poem' <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Cuntz, Manfred; Gurdemir, Levent; George, Martin</p> <p>2016-04-01</p> <p>Sappho was a Greek lyric poet who composed a significant array of pristine poetry. Although much of it has been lost, her reputation has endured thanks to numerous surviving fragments. One of her contributions includes the so-called 'Midnight Poem', which contains a line about the Pleiades, setting sometime before midnight, and supposedly observed from the island of Lesbos. This poem also refers to the setting of the Moon. Sappho's Midnight Poem thus represents a prime example of where ancient poetry and astronomy merge, and it also offers the possibility of seasonal dating. Previously, Herschberg and Mebius (1990) estimated that the poem was composed in late winter/early spring, a time frame that is not unusual for lyrics of an amorous nature. The aim of our paper is to <span class="hlt">revisit</span> this earlier finding by using modern-day software. Our study confirms Herschberg and Mebius' result, but also conveys further information.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3099540','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3099540"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Simplified Bernoulli Equation</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Heys, Jeffrey J; Holyoak, Nicole; Calleja, Anna M; Belohlavek, Marek; Chaliki, Hari P</p> <p>2010-01-01</p> <p>Background: The assessment of the severity of aortic valve stenosis is done by either invasive catheterization or non-invasive Doppler Echocardiography in conjunction with the simplified Bernoulli equation. The catheter measurement is generally considered more accurate, but the procedure is also more likely to have dangerous complications. Objective: The focus here is on examining computational fluid dynamics as an alternative method for analyzing the echo data and determining whether it can provide results similar to the catheter measurement. Methods: An in vitro heart <span class="hlt">model</span> with a rigid orifice is used as a first step in comparing echocardiographic data, which uses the simplified Bernoulli equation, catheterization, and echocardiographic data, which uses computational fluid dynamics (i.e., the Navier-Stokes equations). Results: For a 0.93cm2 orifice, the maximum pressure gradient predicted by either the simplified Bernoulli equation or computational fluid dynamics was not significantly different from the experimental catheter measurement (p > 0.01). For a smaller 0.52cm2 orifice, there was a small but significant difference (p < 0.01) between the simplified Bernoulli equation and the computational fluid dynamics simulation, with the computational fluid dynamics simulation giving better agreement with experimental data for some turbulence <span class="hlt">models</span>. Conclusion: For this simplified, in vitro system, the use of computational fluid dynamics provides an improvement over the simplified Bernoulli equation with the biggest improvement being seen at higher valvular stenosis levels. PMID:21625471</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22373670','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22373670"><span id="translatedtitle">The isotropic radio background <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Fornengo, Nicolao; Regis, Marco; Lineros, Roberto A.</p> <p>2014-04-01</p> <p>We present an extensive analysis on the determination of the isotropic radio background. We consider six different radio maps, ranging from 22 MHz to 2.3 GHz and covering a large fraction of the sky. The large scale emission is <span class="hlt">modeled</span> as a linear combination of an isotropic component plus the Galactic synchrotron radiation and thermal bremsstrahlung. Point-like and extended sources are either masked or accounted for by means of a template. We find a robust estimate of the isotropic radio background, with limited scatter among different Galactic <span class="hlt">models</span>. The level of the isotropic background lies significantly above the contribution obtained by integrating the number counts of observed extragalactic sources. Since the isotropic component dominates at high latitudes, thus making the profile of the total emission flat, a Galactic origin for such excess appears unlikely. We conclude that, unless a systematic offset is present in the maps, and provided that our current understanding of the Galactic synchrotron emission is reasonable, extragalactic sources well below the current experimental threshold seem to account for the majority of the brightness of the extragalactic radio sky.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012EGUGA..14.5491K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012EGUGA..14.5491K"><span id="translatedtitle"><span class="hlt">Revisiting</span> Cometary Bow Shock Positions</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Koenders, C.; Glaßmeier, K.-H.; Nabert, C.; Richter, I.</p> <p>2012-04-01</p> <p>The interaction region between the exosphere of a comet and the solar wind reveals a variety of plasma structures and boundaries which are predicted by several plasma <span class="hlt">models</span> and/or have been observed by a spacecraft mission, e.g. by the GIOTTO mission to comet 1P/Halley and 26P/Grigg-Skjellerup. With regard to the arrival of the next cometary spacecraft mission ROSETTA at its target comet 67P/Churyumov-Gerasimenko (CG), it is necessary to develop <span class="hlt">models</span> of the estimated positions of the different plasma boundaries. This knowledge will be used for the mission planning of the ROSETTA mission in order to prepare the required trajectories for the measurements, to ensure the scientific success of this unique mission. One of the boundaries in the interaction region, which is of particular interest for the mission planning, is the bow shock, where the supersonic flow is strongly decelerated to subsonic velocities. This boundary has been first predicted by Biermann et al. [1967]. They used a one-dimensional hydrodynamical <span class="hlt">model</span> to describe the plasma flow in front of the bow shock. As a result, they ascertained that the velocity of the plasma decreases during the injection of mass into the flow. Furthermore, they found a point at which the mean molecular weight of the plasma normalised by proton mass reaches the critical value of 4/3. Hence, Biermann et al. [1967] suggested that the bow shock is located at this position. For typical solar wind conditions at 1.3 AU and a gas production rate of 5· 1027 1/s this point would be 5557 km in front of comet CG. However, more recent numerical simulation results of Hansen et al. [2007] and Gortsas et al. [2010] for the same set of parameters forecast distances of 3500 km and 1764 km, respectively. Using the A.I.K.E.F. hybrid code, we present detailed further simulations and determinations of the bow shock stand-off distance. Deviations from the earlier results by Biermann et al. [1967] are discussed and explained.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002IJMPA..17.1979B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002IJMPA..17.1979B"><span id="translatedtitle">Anomalies in Ward Identities for Three-Point Functions <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Battistel, O. A.; Battistel, O. L.</p> <p></p> <p>A general calculational method is applied to investigate symmetry relations among divergent amplitudes in a free fermion <span class="hlt">model</span>. A very traditional work on this subject is <span class="hlt">revisited</span>. A systematic study of one, two and three-point functions associated to scalar, pseudoscalar, vector and axial-vector densities is performed. The divergent content of the amplitudes are left in terms of five basic objects (external momentum independent). No specific assumptions about a regulator is adopted in the calculations. All ambiguities and symmetry violating terms are shown to be associated with only three combinations of the basic divergent objects. Our final results can be mapped in the corresponding Dimensional Regularization calculations (in cases where this technique could be applied) or in those of Gertsein and Jackiw which we will show in detail. The results emerging from our general approach allow us to extract, in a natural way, a set of reasonable conditions (e.g. crucial for QED consistency) that could lead us to obtain all Ward Identities satisfied. Consequently, we conclude that the traditional approach used to justify the famous triangular anomalies in perturbative calculations could be questionable. An alternative point of view, dismissed of ambiguities, which lead to a correct description of the associated phenomenology, is pointed out.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4241300','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4241300"><span id="translatedtitle">Psychological Well-Being <span class="hlt">Revisited</span>: Advances in Science and Practice</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Ryff, Carol D.</p> <p>2014-01-01</p> <p>This article reviews the research and interventions that have grown up around a <span class="hlt">model</span> of psychological well-being (Ryff, 1989) generated more than two decades ago to address neglected aspects of positive functioning, such as purposeful engagement in life, realization of personal talents and capacities, and enlightened self-knowledge. The conceptual origins of this formulation are <span class="hlt">revisited</span> and scientific products emerging from six thematic areas are examined: (1) how well-being changes across adult development and later life, (2) what are the personality correlates of well-being, (3) how well-being is linked with experiences in family life, (4) how well-being relates to work and other community activities, (5) what are the connections between well-being and health, including biological risk factors, (6) and via clinical and intervention studies, how psychological well-being can be promoted for ever greater segments of society. Together, these topics illustrate flourishing interest across diverse scientific disciplines in understanding adults as striving, meaning-making, proactive organisms who are actively negotiating the challenges of life. A take-home message is that increasing evidence supports the health protective features of psychological well-being in reducing risk for disease and promoting length of life. A recurrent and increasingly important theme is resilience – the capacity to maintain or regain well-being in the face of adversity. Implications for future research and practice are considered. PMID:24281296</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4637800','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4637800"><span id="translatedtitle">Fever tree <span class="hlt">revisited</span>: From malaria to autoinflammatory diseases</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Pastore, Serena; Vuch, Josef; Bianco, Anna Monica; Taddio, Andrea; Tommasini, Alberto</p> <p>2015-01-01</p> <p>Over the centuries the idea of recurrent fevers has mainly been associated with malaria, but many other fevers, such as typhoid and diphtheria were cause for concern. It is only in recent times, with the more severe forms of fever from infectious origin becoming less frequent or a cause for worry that we started noticing recurrent fevers without any clear infectious cause, being described as having a pathogenesis of autoinflammatory nature. The use of molecular examinations in many cases can allow a diagnosis where the cause is monogenic. In other cases, however the pathogenesis is likely to be multifactorial and the diagnostic-therapeutic approach is strictly clinical. The old fever tree paradigm developed to describe fevers caused by malaria has been <span class="hlt">revisited</span> here to describe today’s periodic fevers from the periodic fever adenitis pharyngitis aphthae syndrome to the more rare autoinflammatory diseases. This <span class="hlt">model</span> may allow us to place cases that are yet to be identified which are likely to be of multifactorial origin. PMID:26566482</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015AIPC.1677k0007D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015AIPC.1677k0007D"><span id="translatedtitle">Groundwater and river water interaction on Cikapundung River: <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Darul, A.; Irawan, D. E.; Trilaksono, N. J.</p> <p>2015-09-01</p> <p>The interaction between groundwater and Cikapundung river water has not changed significantly in 16 years of period. This paper <span class="hlt">revisit</span> the similar research based on 43 measurement points: 13 dug wells, 2 springs, and 24 river, distributed along the riverbank at Curug Dago to Batununggal segment. The field measurements were taken in rainy season of April to May 2014 using portable instruments. Six parameters were measured: water level, temperature, total dissolved solids (TDS), dissolved-oxygen (DO), and pH. The new <span class="hlt">model</span> is unable to detect significant change in water flow, however it finds two local anomalies in Dago Pojok and Cikapayang area. Both locations show local drawdown circle which can induce influent stream in overal effluent environment. Moreover, water quality parameters indicate mixing processes between groundwater and river water, with erratic pattern both in effluent and influent stream. Also some DO and TDS readings exceed the permissible limit. These values suggest a lifted groundwater mineralization from organic and non-organic sources and change of chemical stability. The source of contamination is still under further examination.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26566482','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26566482"><span id="translatedtitle">Fever tree <span class="hlt">revisited</span>: From malaria to autoinflammatory diseases.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Pastore, Serena; Vuch, Josef; Bianco, Anna Monica; Taddio, Andrea; Tommasini, Alberto</p> <p>2015-11-01</p> <p>Over the centuries the idea of recurrent fevers has mainly been associated with malaria, but many other fevers, such as typhoid and diphtheria were cause for concern. It is only in recent times, with the more severe forms of fever from infectious origin becoming less frequent or a cause for worry that we started noticing recurrent fevers without any clear infectious cause, being described as having a pathogenesis of autoinflammatory nature. The use of molecular examinations in many cases can allow a diagnosis where the cause is monogenic. In other cases, however the pathogenesis is likely to be multifactorial and the diagnostic-therapeutic approach is strictly clinical. The old fever tree paradigm developed to describe fevers caused by malaria has been <span class="hlt">revisited</span> here to describe today's periodic fevers from the periodic fever adenitis pharyngitis aphthae syndrome to the more rare autoinflammatory diseases. This <span class="hlt">model</span> may allow us to place cases that are yet to be identified which are likely to be of multifactorial origin. PMID:26566482</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015MNRAS.451.4384T','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015MNRAS.451.4384T"><span id="translatedtitle">Magnetic field-gas density relation and observational implications <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Tritsis, A.; Panopoulou, G. V.; Mouschovias, T. Ch.; Tassis, K.; Pavlidou, V.</p> <p>2015-08-01</p> <p>We <span class="hlt">revisit</span> the relation between magnetic-field strength (B) and gas density (ρ) for contracting interstellar clouds and fragments (or, cores), which is central in observationally determining the dynamical importance of magnetic fields in cloud evolution and star formation. Recently, it has been claimed that a relation B ∝ ρ2/3 is statistically preferred over B ∝ ρ1/2 in molecular clouds, when magnetic-field detections and non-detections from Zeeman observations are combined. This finding has unique observational implications on cloud and core geometry: the relation B ∝ ρ2/3 can only be realized under spherical contraction. However, no indication of spherical geometry can be found for the objects used in the original statistical analysis of the B-ρ relation. We trace the origin of the inconsistency to simplifying assumptions in the statistical <span class="hlt">model</span> used to arrive at the B ∝ ρ2/3 conclusion and to an underestimate of observational uncertainties in the determination of cloud and core densities. We show that, when these restrictive assumptions are relaxed, B ∝ ρ1/2 is the preferred relation for the (self-gravitating) molecular-cloud data, as theoretically predicted four decades ago.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/17458454','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/17458454"><span id="translatedtitle">Gilead <span class="hlt">revisited</span>: faith and recovery.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bussema, Evelyn F; Bussema, Kenneth E</p> <p>2007-01-01</p> <p>The role of spirituality in recovery from mental illness has gained increased attention in recent years. In this article, the authors present an update on previous work exploring the role and function of religion/spirituality in the lives of people participating in a psychiatric rehabilitation program (Bussema & Bussema, 2000). Fifty-eight (58) participants age 18 to 64 completed a spirituality survey based on Pargament's five coping functions of religion. Chi-square tests for independence and independent groups t-tests were performed. Seventy-one percent of the respondents reported that their spiritual life has played a significant role in their recovery. Reported religious coping strategies are discussed within the framework of a recovery <span class="hlt">model</span> of service delivery. PMID:17458454</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015PMB....60.1613E','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015PMB....60.1613E"><span id="translatedtitle">Randoms and TOF gain <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Eriksson, Lars; Conti, Maurizio</p> <p>2015-02-01</p> <p>Time-of-flight (TOF) positron emission tomography (PET) typically reduces the variance in the images by a factor that is proportional to the size of the object to be scanned, and inversely proportional to the time resolution of the PET scanner. Attempts to better characterize this relationship and understand its limits have been published, showing that such gain also increases with random fraction. In this paper, new experimental and simulated data are analyzed and old results are incorporated in the study. The proportionality of TOF gain with time resolution is confirmed, the proportionality constant is measured, the effect of the randoms is validated, and the limit of the <span class="hlt">model</span> for small objects is investigated.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3667247','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3667247"><span id="translatedtitle">The rhizosphere <span class="hlt">revisited</span>: root microbiomics</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Bakker, Peter A. H. M.; Berendsen, Roeland L.; Doornbos, Rogier F.; Wintermans, Paul C. A.; Pieterse, Corné M. J.</p> <p>2013-01-01</p> <p>The rhizosphere was defined over 100 years ago as the zone around the root where microorganisms and processes important for plant growth and health are located. Recent studies show that the diversity of microorganisms associated with the root system is enormous. This rhizosphere microbiome extends the functional repertoire of the plant beyond imagination. The rhizosphere microbiome of Arabidopsis thaliana is currently being studied for the obvious reason that it allows the use of the extensive toolbox that comes with this <span class="hlt">model</span> plant. Deciphering plant traits that drive selection and activities of the microbiome is now a major challenge in which Arabidopsis will undoubtedly be a major research object. Here we review recent microbiome studies and discuss future research directions and applicability of the generated knowledge. PMID:23755059</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26743500','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26743500"><span id="translatedtitle">Budded baculovirus particle structure <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wang, Qiushi; Bosch, Berend-Jan; Vlak, Just M; van Oers, Monique M; Rottier, Peter J; van Lent, Jan W M</p> <p>2016-02-01</p> <p>Baculoviruses are a group of enveloped, double-stranded DNA insect viruses with budded (BV) and occlusion-derived (ODV) virions produced during their infection cycle. BVs are commonly described as rod shaped particles with a high apical density of protein extensions (spikes) on the lipid envelope surface. However, due to the fragility of BVs the conventional purification and electron microscopy (EM) staining methods considerably distort the native viral structure. Here, we use cryo-EM analysis to reveal the near-native morphology of two intensively studied baculoviruses, Autographa californica multicapsid nucleopolyhedrovirus (AcMNPV) and Spodoptera exigua MNPV (SeMNPV), as <span class="hlt">models</span> for BVs carrying GP64 and F as envelope fusion protein on the surface. The now well-preserved AcMNPV and SeMNPV BV particles have a remarkable elongated, ovoid shape leaving a large, lateral space between nucleocapsid (NC) and envelope. Consistent with previous findings the NC has a distinctive cap and base structure interacting tightly with the envelope. This tight interaction may explain the partial retaining of the envelope on both ends of the NC and the disappearance of the remainder of the BV envelope in the negative-staining EM images. Cryo-EM also reveals that the viral envelope contains two layers with a total thickness of ?6-7nm, which is significantly thicker than a usual biological membrane (<4nm) as measured by X-ray scanning. Most spikes are densely clustered at the two apical ends of the virion although some envelope proteins are also found more sparsely on the lateral regions. The spikes on the surface of AcMNPV BVs appear distinctly different from those of SeMNPV. Based on our observations we propose a new near-native structural <span class="hlt">model</span> of baculovirus BVs. PMID:26743500</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015NuPhB.893..236F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015NuPhB.893..236F"><span id="translatedtitle">Generalized spin Sutherland systems <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Fehér, L.; Pusztai, B. G.</p> <p>2015-04-01</p> <p>We present generalizations of the spin Sutherland systems obtained earlier by Blom and Langmann and by Polychronakos in two different ways: from SU (n) Yang-Mills theory on the cylinder and by constraining geodesic motion on the N-fold direct product of SU (n) with itself, for any N > 1. Our systems are in correspondence with the Dynkin diagram automorphisms of arbitrary connected and simply connected compact simple Lie groups. We give a finite-dimensional as well as an infinite-dimensional derivation and shed light on the mechanism whereby they lead to the same classical integrable systems. The infinite-dimensional approach, based on twisted current algebras (alias Yang-Mills with twisted boundary conditions), was inspired by the derivation of the spinless Sutherland <span class="hlt">model</span> due to Gorsky and Nekrasov. The finite-dimensional method relies on Hamiltonian reduction under twisted conjugations of N-fold direct product groups, linking the quantum mechanics of the reduced systems to representation theory similarly as was explored previously in the N = 1 case.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016A%26A...586A..65D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016A%26A...586A..65D"><span id="translatedtitle">Deuterated polycyclic aromatic hydrocarbons: <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Doney, K. D.; Candian, A.; Mori, T.; Onaka, T.; Tielens, A. G. G. M.</p> <p>2016-02-01</p> <p>Aims: The amount of deuterium locked up in polycyclic aromatic hydrocarbons (PAHs) has to date been an uncertain value. We present a near-infrared (NIR) spectroscopic survey of Hii regions in the Milky Way, Large Magellanic Cloud, and Small Magellanic Cloud obtained with AKARI, which aims to search for features indicative of deuterated PAHs (PAD or Dn-PAH) to better constrain the D/H ratio of PAHs. Methods: Fifty-three Hii regions were observed in the NIR (2.5-5 μm), using the Infrared Camera (IRC) on board the AKARI satellite. Through comparison of the observed spectra with a theoretical <span class="hlt">model</span> of deuterated PAH vibrational modes, the aromatic and (a)symmetric aliphatic C-D stretch modes were identified. Results: We see emission features between 4.4-4.8 μm, which could be unambiguously attributed to deuterated PAHs in only six of the observed sources, all of which are located in the Milky Way. In all cases, the aromatic C-D stretching feature is weaker than the aliphatic C-D stretching feature, and, in the case of M17b, this feature is not observed at all. Based on the weak or absent PAD features in most of the observed spectra, it is suggested that the mechanism for PAH deuteration in the ISM is uncommon.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22130976','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22130976"><span id="translatedtitle">PHOTOEVAPORATION OF CIRCUMSTELLAR DISKS <span class="hlt">REVISITED</span>: THE DUST-FREE CASE</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Tanaka, Kei E. I.; Omukai, Kazuyuki; Nakamoto, Taishi</p> <p>2013-08-20</p> <p>Photoevaporation by stellar ionizing radiation is believed to play an important role in the dispersal of disks around young stars. The mass-loss <span class="hlt">model</span> for dust-free disks developed by Hollenbach et al. is currently regarded as the conventional one and has been used in a wide variety of studies. However, the rate in this <span class="hlt">model</span> was derived using the crude so-called 1+1D approximation of ionizing radiation transfer, which assumes that diffuse radiation propagates in a direction vertical to the disk. In this study, we <span class="hlt">revisit</span> the photoevaporation of dust-free disks by solving the two-dimensional axisymmetric radiative transfer for steady-state disks. Unlike that solved by the conventional <span class="hlt">model</span>, we determine that direct stellar radiation is more important than the diffuse field at the disk surface. The radial density distribution at the ionization boundary is represented by a single power law with index -3/2 in contrast to the conventional double power law. For this distribution, the photoevaporation rate from the entire disk can be written as a function of the ionizing photon emissivity {Phi}{sub EUV} from the central star and the disk outer radius r{sub d} as follows: M-dot{sub PE} = 5.4 x 10{sup -5} ({Phi}{sub EUV}/10{sup 49} s{sup -1}){sup 1/2} (r{sub d}/1000 AU){sup 1/2} M{sub Sun} yr{sup -1}. This new rate depends on the outer disk radius rather than on the gravitational radius as in the conventional <span class="hlt">model</span>, because of the enhanced contribution to the mass loss from the outer disk annuli. In addition, we discuss its applications to present-day as well as primordial star formation.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li class="active"><span>21</span></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_21 --> <div id="page_22" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li class="active"><span>22</span></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="421"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1994Metic..29..323W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1994Metic..29..323W"><span id="translatedtitle">Apollo 12 ropy glasses <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Wentworth, S. J.; McKay, D. S.; Lindstrom, D. J.; Basu, A.; Martinez, R. R.; Bogard, D. D.; Garrison, D. H.</p> <p>1994-05-01</p> <p>We analyzed ropy glasses from Apollo 12 soils 12032 and 12033 by a variety of techniques including SEM/EDX, electron microprobe analysis, INAA, and Ar-39-Ar-40 age dating. The ropy glasses have potassium rare earth elements phosphorous (KREEP)-like compositions different from those of local Apollo 12 mare soils; it is likely that the ropy glasses are of exotic origin. Mixing calculations indicate that the ropy glasses formed from a liquid enriched in KREEP and that the ropy glass liquid also contained a significant amount of mare material. The presence of solar Ar and a trace of regolith-derived glass within the ropy glasses are evidence that the ropy glasses contain a small regolith component. Anorthosite and crystalline breccia (KREEP) clasts occur in some ropy glasses. We also found within these glasses clasts of felsite (fine-grained granitic fragments) very similar in texture and composition to the larger Apollo 12 felsites, which have a Ar-39-Ar-40 degassing age of 800 +/- 15 Ma. Measurements of 39-Ar-40-Ar in 12032 ropy glass indicate that it was degassed at the same time as the large felsite although the ropy glass was not completely degassed. The ropy glasses and felsites, therefore, probably came from the same source. Most early investigators suggested that the Apollo 12 ropy glasses were part of the ejecta deposited at the Apollo 12 site from the Copernicus impact. Our new data reinforce this <span class="hlt">model</span>. If these ropy glasses are from Copernicus, they provide new clues to the nature of the target material at the Copernicus site, a part of the Moon that has not been sampled directly.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://hdl.handle.net/2060/19930005146','NASA-TRS'); return false;" href="http://hdl.handle.net/2060/19930005146"><span id="translatedtitle">Mantle plumes on Venus <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Kiefer, Walter S.</p> <p>1992-01-01</p> <p>The Equatorial Highlands of Venus consist of a series of quasicircular regions of high topography, rising up to about 5 km above the mean planetary radius. These highlands are strongly correlated with positive geoid anomalies, with a peak amplitude of 120 m at Atla Regio. Shield volcanism is observed at Beta, Eistla, Bell, and Atla Regiones and in the Hathor Mons-Innini Mons-Ushas Mons region of the southern hemisphere. Volcanos have also been mapped in Phoebe Regio and flood volcanism is observed in Ovda and Thetis Regiones. Extensional tectonism is also observed in Ovda and Thetis Regiones. Extensional tectonism is also observed in many of these regions. It is now widely accepted that at least Beta, Atla, Eistla, and Bell Regiones are the surface expressions of hot, rising mantel plumes. Upwelling plumes are consistent with both the volcanism and the extensional tectonism observed in these regions. The geoid anomalies and topography of these four regions show considerable variation. Peak geoid anomalies exceed 90 m at Beta and Atla, but are only 40 m at Eistla and 24 m at Bell. Similarly, the peak topography is greater at Beta and Atla than at Eistla and Bell. Such a range of values is not surprising because terrestrial hotspot swells also have a side range of geoid anomalies and topographic uplifts. Kiefer and Hager used cylindrical axisymmetric, steady-state convection calculations to show that mantle plumes can quantitatively account for both the amplitude and the shape of the long-wavelength geoid and topography at Beta and Atla. In these <span class="hlt">models</span>, most of the topography of these highlands is due to uplift by the vertical normal stress associated with the rising plume. Additional topography may also be present due to crustal thickening by volcanism and crustal thinning by rifting. Smrekar and Phillips have also considered the geoid and topography of plumes on Venus, but they restricted themselves to considering only the geoid-topography ratio and did not examine either the geoid and topography amplitudes separately or the shapes of anomalies.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://dx.doi.org/10.1016/0376-6357(89)90002-8','USGSPUBS'); return false;" href="http://dx.doi.org/10.1016/0376-6357(89)90002-8"><span id="translatedtitle">Predator-prey interactions, resource depression and patch <span class="hlt">revisitation</span></span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Erwin, R.M.</p> <p>1989-01-01</p> <p>Generalist predators may be confronted by different types of prey in different patches: sedentary and conspicuous, cryptic (with or without refugia), conspicuous and nonsocial, or conspicuous and social. I argue that, where encounter rates with prey are of most importance, patch <span class="hlt">revisitation</span> should be a profitable tactic where prey have short 'recovery' times (conspicuous, nonsocial prey), or where anti-predator response (e.g. shoaling) may increase conspicuousness. Predictions are made for how temporal changes in prey encounter rates should affect <span class="hlt">revisit</span> schedules and feeding rates for the 4 different prey types.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/25168337','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/25168337"><span id="translatedtitle">Extrasynaptic NMDA Receptor in Excitotoxicity: Function <span class="hlt">Revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhou, Xianju; Chen, Zhuoyou; Yun, Wenwei; Ren, Jianhua; Li, Chengwei; Wang, Hongbing</p> <p>2015-08-01</p> <p>It is generally accepted that proper activation of N-methyl-d-aspartate receptors (NMDARs) promotes neuronal survival and supports neuroplasticity, and excessive NMDAR activation leads to pathological outcomes and neurodegeneration. As NMDARs are found at both synaptic and extrasynaptic sites, there is significant interest in determining how NMDARs at different subcellular locations differentially regulate physiological as well as pathological functions. Better understanding of this issue may support the development of therapeutic strategies to attenuate neuronal death or promote normal brain function. Although the current prevailing theory emphasizes the major role of extrasynaptic NMDARs in neurodegeneration, there is growing evidence indicating the involvement of synaptic receptors. It is also evident that physiological functions of the brain also involve extrasynaptic NMDARs. Our recent studies demonstrate that the degree of cell death following neuronal insults depends on the magnitude and duration of synaptic and extrasynaptic receptor co-activation. These new results underscore the importance of <span class="hlt">revisiting</span> the function of extrasynaptic NMDARs in cell fate. Furthermore, the development of antagonists that preferentially inhibit synaptic or extrasynaptic receptors may better clarify the role of NMDARs in neurodegeneration. PMID:25168337</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016JSSCh.235...28N','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016JSSCh.235...28N"><span id="translatedtitle">Role of iron in synthetic tetrahedrites <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Nasonova, Daria I.; Presniakov, Igor A.; Sobolev, Alexei V.; Verchenko, Valeriy Yu.; Tsirlin, Alexander A.; Wei, Zheng; Dikarev, Evgeny V.; Shevelkov, Andrei V.</p> <p>2016-03-01</p> <p>The valence state of iron in Cu12-xFexSb4S13 tetrahedrites have been <span class="hlt">revisited</span> by the combination of the crystallographic results, Mössbauer spectroscopy, and magnetization measurements. The crystal structure solution for Cu11.0Fe1.0Sb4S13 (space group I 4 bar 3m, a=10.3253(12), z=2, R=0.011) proved that iron substitutes for copper only in the Cu1 position. At the iron content of x=0.8, 1.0, and 1.2, the presence of two nonequivalent and non-interacting Fe3+ cations was inferred from Mössbauer spectra. At higher levels of substitution (x=1.5 and 2.0), room-temperature Mössbauer spectra indicate the electron hopping between part of Fe3+ and Fe2+ centers, whereas the rest of iron atoms exists as valence-localized Fe3+ and Fe2+ cations. Electron transfer is frozen out at 77 K, where a combination of two Fe3+ sites and one high-spin Fe2+ site is observed. Paramagnetic effective moments extracted from the magnetic susceptibility data point at the Fe3+ state of iron at x=0.8, while a mixture of Fe2+ and Fe3+ is presumed in the samples with higher Fe content.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22308220','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22308220"><span id="translatedtitle"><span class="hlt">Revisiting</span> the relaxation dynamics of isolated pyrrole</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Montero, Raúl; Ovejas, Virginia; Fernández-Fernández, Marta; Longarte, Asier; Peralta Conde, Álvaro</p> <p>2014-07-07</p> <p>Herein, the interpretation of the femtosecond-scale temporal evolution of the pyrrole ion signal, after excitation in the 267–217 nm interval, recently published by our group [R. Montero, A. Peralta Conde, V. Ovejas, M. Fernández-Fernández, F. Castaño, J. R. Vázquez de Aldana, and A. Longarte, J. Chem. Phys.137, 064317 (2012)] is <span class="hlt">re-visited</span>. The observation of a shift in the pyrrole{sup +} transient respect to zero delay reference, initially attributed to ultrafast dynamics on the πσ{sup *} type state (3s a{sub 1} ← π 1a{sub 2}), is demonstrated to be caused by the existence of pump + probe populated states, along the ionization process. The influence of these resonances in pump-prone ionization experiments, when multi-photon probes are used, and the significance of a proper zero-time reference, is discussed. The possibility of preparing the πσ{sup *} state by direct excitation is investigated by collecting 1 + 1 photoelectron spectra, at excitation wavelengths ranging from 255 to 219 nm. No conclusive evidences of ionization through this state are found.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012JChPh.136m4505O','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012JChPh.136m4505O"><span id="translatedtitle"><span class="hlt">Revisiting</span> the phase diagram of hard ellipsoids</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Odriozola, Gerardo</p> <p>2012-04-01</p> <p>In this work, the well-known Frenkel-Mulder phase diagram of hard ellipsoids of revolution [D. Frenkel and B. M. Mulder, Mol. Phys. 55, 1171 (1985), 10.1080/00268978500101971] is <span class="hlt">revisited</span> by means of replica exchange Monte Carlo simulations. The method provides good sampling of dense systems and so, solid phases can be accessed without the need of imposing a given structure. At high densities, we found plastic solids and fcc-like crystals for semi-spherical ellipsoids (prolates and oblates), and SM2 structures [P. Pfleiderer and T. Schilling, Phys. Rev. E 75, 020402 (2007)] for x : 1-prolates and 1 : x-oblates with x ≥ 3. The revised fluid-crystal and isotropic-nematic transitions reasonably agree with those presented in the Frenkel-Mulder diagram. An interesting result is that, for small system sizes (100 particles), we obtained 2:1- and 1.5:1-prolate equations of state without transitions, while some order is developed at large densities. Furthermore, the symmetric oblate cases are also reluctant to form ordered phases.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26673171','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26673171"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Anatomy of the Living Heart.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Mori, Shumpei; Spicer, Diane E; Anderson, Robert H</p> <p>2015-12-25</p> <p>An understanding of the complexity of cardiac anatomy is required by all who seek, in the setting of cardiac disease, to interpret the images confronting them. Although the mysteries of cardiac structure have been extensively addressed, significant gaps continue to exist between the descriptions provided by morphologists and by those working in the clinical setting. In part, this reflects the limitations in providing 3D visualization of such a complicated organ. Current 3D imaging technology now permits visualization of the cardiac components using datasets obtained in the living individual. These advances, furthermore, demonstrate the anatomy in the setting of the heart as imaged within the thorax. It has been failure to describe the heart as it lies within the thorax that remains a major deficiency of many morphologists relying on the dissecting room to provide the gold standard. Describing the heart in attitudinally appropriate fashion, a basic rule of clinical anatomy, creates the necessary bridges between anatomists and clinicians. The rapid progression of cardiac interventional techniques, furthermore, emphasizes the need to <span class="hlt">revisit</span> cardiac anatomy using a multidisciplinary approach. In this review, therefore, we illustrate the advantages of an attitudinally correct approach to cardiac anatomy. We then focus on the morphology of the arterial roots, revealing the accuracy that can now be achieved by clinicians using datasets obtained during life. (Circ J 2016; 80: 24-33). PMID:26673171</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/22482570','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/22482570"><span id="translatedtitle"><span class="hlt">Revisiting</span> the phase diagram of hard ellipsoids.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Odriozola, Gerardo</p> <p>2012-04-01</p> <p>In this work, the well-known Frenkel-Mulder phase diagram of hard ellipsoids of revolution [D. Frenkel and B. M. Mulder, Mol. Phys. 55, 1171 (1985)] is <span class="hlt">revisited</span> by means of replica exchange Monte Carlo simulations. The method provides good sampling of dense systems and so, solid phases can be accessed without the need of imposing a given structure. At high densities, we found plastic solids and fcc-like crystals for semi-spherical ellipsoids (prolates and oblates), and SM2 structures [P. Pfleiderer and T. Schilling, Phys. Rev. E 75, 020402 (2007)] for x : 1-prolates and 1 : x-oblates with x ≥ 3. The revised fluid-crystal and isotropic-nematic transitions reasonably agree with those presented in the Frenkel-Mulder diagram. An interesting result is that, for small system sizes (100 particles), we obtained 2:1- and 1.5:1-prolate equations of state without transitions, while some order is developed at large densities. Furthermore, the symmetric oblate cases are also reluctant to form ordered phases. PMID:22482570</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/24899345','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/24899345"><span id="translatedtitle">[What mirror neurons have revealed: <span class="hlt">revisited</span>].</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Murata, Akira; Maeda, Kazutaka</p> <p>2014-06-01</p> <p>The first paper on mirror neurons was published in 1992. In the span of over two decades since then, much knowledge about the relationship between social cognitive function and the motor control system has been accumulated. Direct matching of visual actions and their corresponding motor representations is the most important functional property of mirror neuron. Many studies have emphasized intrinsic simulation as a core concept for mirror neurons. Mirror neurons are thought to play a role in social cognitive function. However, the function of mirror neurons in the macaque remains unclear, because such cognitive functions are limited or lacking in macaque monkeys. It is therefore important to discuss these neurons in the context of motor function. Rizzolatti and colleagues have stressed that the most important function of mirror neurons in macaques is recognition of actions performed by other individuals. I suggest that mirror neurons in the Macaque inferior pariental lobule might be correlated with body schema. In the parieto-premotor network, matching of corollary discharge and actual sensory feedback is an essential neuronal operation. Recently, neurons showing mirror properties were found in some cortical areas outside the mirror neuron system. The current work would <span class="hlt">revisit</span> the outcomes of mirror neuron studies to discuss the function of mirror neurons in the monkey. PMID:24899345</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1892780','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1892780"><span id="translatedtitle"><span class="hlt">Revisiting</span> the argument from fetal potential</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Manninen, Bertha Alvarez</p> <p>2007-01-01</p> <p>One of the most famous, and most derided, arguments against the morality of abortion is the argument from potential, which maintains that the fetus' potential to become a person and enjoy the valuable life common to persons, entails that its destruction is prima facie morally impermissible. In this paper, I will <span class="hlt">revisit</span> and offer a defense of the argument from potential. First, I will criticize the classical arguments proffered against the importance of fetal potential, specifically the arguments put forth by philosophers Peter Singer and David Boonin, by carefully unpacking the claims made in these arguments and illustrating why they are flawed. Secondly, I will maintain that fetal potential is morally relevant when it comes to the morality of abortion, but that it must be accorded a proper place in the argument. This proper place, however, cannot be found until we first answer a very important and complex question: we must first address the issue of personal identity, and when the fetus becomes the type of being who is relevantly identical to a future person. I will illustrate why the question of fetal potential can only be meaningfully addressed after we have first answered the question of personal identity and how it relates to the human fetus. PMID:17509146</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/24943886','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/24943886"><span id="translatedtitle">Carbon emission from global hydroelectric reservoirs <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Li, Siyue; Zhang, Quanfa</p> <p>2014-12-01</p> <p>Substantial greenhouse gas (GHG) emissions from hydropower reservoirs have been of great concerns recently, yet the significant carbon emitters of drawdown area and reservoir downstream (including spillways and turbines as well as river reaches below dams) have not been included in global carbon budget. Here, we <span class="hlt">revisit</span> GHG emission from hydropower reservoirs by considering reservoir surface area, drawdown zone and reservoir downstream. Our estimates demonstrate around 301.3 Tg carbon dioxide (CO2)/year and 18.7 Tg methane (CH4)/year from global hydroelectric reservoirs, which are much higher than recent observations. The sum of drawdown and downstream emission, which is generally overlooked, represents 42 % CO2 and 67 % CH4 of the total emissions from hydropower reservoirs. Accordingly, the global average emissions from hydropower are estimated to be 92 g CO2/kWh and 5.7 g CH4/kWh. Nonetheless, global hydroelectricity could currently reduce approximate 2,351 Tg CO2eq/year with respect to fuel fossil plant alternative. The new findings show a substantial revision of carbon emission from the global hydropower reservoirs. PMID:24943886</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=civil+AND+procedure+AND+law&pg=2&id=EJ529563','ERIC'); return false;" href="http://eric.ed.gov/?q=civil+AND+procedure+AND+law&pg=2&id=EJ529563"><span id="translatedtitle">A Feminist <span class="hlt">Revisit</span> to the First-Year Curriculum.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bernstein, Anita</p> <p>1996-01-01</p> <p>A seminar at Chicago-Kent College of Law (Illinois) that reviews six first-year law school courses by focusing on feminist issues in course content and structure is described. The seminar functions as both a review and a shift in perspective. Courses <span class="hlt">revisited</span> include civil procedure, contracts, criminal law, justice and the legal system,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=National+AND+geographic&pg=7&id=EJ968047','ERIC'); return false;" href="http://eric.ed.gov/?q=National+AND+geographic&pg=7&id=EJ968047"><span id="translatedtitle">Rural-Nonrural Disparities in Postsecondary Educational Attainment <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Byun, Soo-yong; Meece, Judith L.; Irvin, Matthew J.</p> <p>2012-01-01</p> <p>Using data from the National Educational Longitudinal Study, this study <span class="hlt">revisited</span> rural-nonrural disparities in educational attainment by considering a comprehensive set of factors that constrain and support youth's college enrollment and degree completion. Results showed that rural students were more advantaged in community social resources</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ959704.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ959704.pdf"><span id="translatedtitle">WAC <span class="hlt">Revisited</span>: You Get What You Pay for</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Perelman, Les</p> <p>2011-01-01</p> <p>In 1982, the author wrote an essay for the second issue of "The Writing Instructor," "Approaches to Comprehensive Writing: Integrating Writing into the College Curriculum," reviewing the early stages of the modern Writing Across the Curriculum (WAC)/Writing in the Disciplines (WID) movement. In this article, the author <span class="hlt">revisits</span> his essay and…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=literacy+AND+technological&pg=5&id=EJ996124','ERIC'); return false;" href="http://eric.ed.gov/?q=literacy+AND+technological&pg=5&id=EJ996124"><span id="translatedtitle"><span class="hlt">Revisiting</span> Jack Goody to Rethink Determinisms in Literacy Studies</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Collin, Ross</p> <p>2013-01-01</p> <p>This article <span class="hlt">revisits</span> Goody's arguments about literacy's influence on social arrangements, culture, cognition, economics, and other domains of existence. Whereas some of his arguments tend toward technological determinism (i.e., literacy causes change in the world), other of his arguments construe literacy as a force that shapes and is shaped by…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Feldhusen&id=EJ1012355','ERIC'); return false;" href="http://eric.ed.gov/?q=Feldhusen&id=EJ1012355"><span id="translatedtitle">Facilitating Grade Acceleration: <span class="hlt">Revisiting</span> the Wisdom of John Feldhusen</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Culross, Rita R.; Jolly, Jennifer L.; Winkler, Daniel</p> <p>2013-01-01</p> <p>This article <span class="hlt">revisits</span> the 1986 Feldhusen, Proctor, and Black recommendations on grade skipping. These recommendations originally appeared as 12 guidelines. In this article, the guidelines are grouped into three general categories: how to screen accelerant candidates, how to engage with the adults in the acceleration process (e.g., teachers,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=environmental+AND+politics&pg=3&id=EJ854465','ERIC'); return false;" href="http://eric.ed.gov/?q=environmental+AND+politics&pg=3&id=EJ854465"><span id="translatedtitle">Environmental Education and Politics: Snakes and Ladders <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Chapman, David</p> <p>2004-01-01</p> <p>This paper <span class="hlt">revisits</span> the history of environmental education in Australia in the 1970s and 1980s and draws parallels between these and current events in four countries, including Australia. It is argued that little has changed and that few environmental educators confront the inherently political nature of their work. It is concluded that…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=acceleration&pg=2&id=EJ1012355','ERIC'); return false;" href="http://eric.ed.gov/?q=acceleration&pg=2&id=EJ1012355"><span id="translatedtitle">Facilitating Grade Acceleration: <span class="hlt">Revisiting</span> the Wisdom of John Feldhusen</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Culross, Rita R.; Jolly, Jennifer L.; Winkler, Daniel</p> <p>2013-01-01</p> <p>This article <span class="hlt">revisits</span> the 1986 Feldhusen, Proctor, and Black recommendations on grade skipping. These recommendations originally appeared as 12 guidelines. In this article, the guidelines are grouped into three general categories: how to screen accelerant candidates, how to engage with the adults in the acceleration process (e.g., teachers,</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=gibbs&pg=4&id=EJ778927','ERIC'); return false;" href="http://eric.ed.gov/?q=gibbs&pg=4&id=EJ778927"><span id="translatedtitle">Moral Judgment Development across Cultures: <span class="hlt">Revisiting</span> Kohlberg's Universality Claims</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Gibbs, John C.; Basinger, Karen S.; Grime, Rebecca L.; Snarey, John R.</p> <p>2007-01-01</p> <p>This article <span class="hlt">revisits</span> Kohlberg's cognitive developmental claims that stages of moral judgment, facilitative processes of social perspective-taking, and moral values are commonly identifiable across cultures. Snarey [Snarey, J. (1985). "The cross-cultural universality of social-moral development: A critical review of Kohlbergian research."…</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li class="active"><span>22</span></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_22 --> <div id="page_23" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li class="active"><span>23</span></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="441"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ786608.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ786608.pdf"><span id="translatedtitle">Closing Achievement Gaps: <span class="hlt">Revisiting</span> Benjamin S. Bloom's "Learning for Mastery"</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Guskey, Thomas R.</p> <p>2007-01-01</p> <p>The problem of achievement gaps among different subgroups of students has been evident in education for many years. This manuscript <span class="hlt">revisits</span> the work of renowned educator Benjamin S. Bloom, who saw reducing gaps in the achievement of various groups of students as a simple problem of reducing variation in student learning outcomes. Bloom observed…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=types+AND+family&pg=2&id=EJ862568','ERIC'); return false;" href="http://eric.ed.gov/?q=types+AND+family&pg=2&id=EJ862568"><span id="translatedtitle">Language Transmission <span class="hlt">Revisited</span>: Family Type, Linguistic Environment and Language Attitudes</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Schupbach, Doris</p> <p>2009-01-01</p> <p>This article <span class="hlt">revisits</span> factors in intergenerational language maintenance and shift within the family. It does so through an in-depth analysis of what 14 migrants to Australia from German-speaking Switzerland reported in written life stories and subsequent life story interviews. The participants represent four family types and a wide age range, and…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=analysis+AND+clinics&pg=3&id=EJ992714','ERIC'); return false;" href="http://eric.ed.gov/?q=analysis+AND+clinics&pg=3&id=EJ992714"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Role of Communication in Adolescent Intimate Partner Violence</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Messinger, Adam M.; Rickert, Vaughn I.; Fry, Deborah A.; Lessel, Harriet; Davidson, Leslie L.</p> <p>2012-01-01</p> <p>A growing literature suggests that communication strategies can promote or inhibit intimate partner violence (IPV). Research on communication is still needed on a group ripe for early IPV intervention: high school-aged adolescents. This article <span class="hlt">revisits</span> our previous analyses of young female reproductive clinic patients (Messinger, Davidson, &…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=zero+AND+tolerance+AND+suspension&pg=6&id=EJ646794','ERIC'); return false;" href="http://eric.ed.gov/?q=zero+AND+tolerance+AND+suspension&pg=6&id=EJ646794"><span id="translatedtitle">Antidote for Zero Tolerance: <span class="hlt">Revisiting</span> a "Reclaiming" School.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Farner, Conrad D.</p> <p>2002-01-01</p> <p>Reports on a <span class="hlt">revisit</span> to the Frank Lloyd Wright Middle School, which implemented strategies to deal with disciplinary problems. The school continues to progress towards creating the type of reclaiming environment necessary to ensure the needs of all students. Strategies used include alternatives to zero tolerance policy; smaller teams of students;…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=action+AND+buffer&pg=2&id=ED218325','ERIC'); return false;" href="http://eric.ed.gov/?q=action+AND+buffer&pg=2&id=ED218325"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Role of Organizational Effectiveness in Educational Evaluation.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Lotto, Linda S.</p> <p></p> <p>Organizational effectiveness ought to play a role in educational evaluation, and the development of alternative perspectives for viewing organizations could be a starting point for <span class="hlt">revisiting</span> organizational evaluation in education. Five possible perspectives and criteria for evaluating organizations have been developed. If an organization is…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Computer+AND+coding&pg=4&id=EJ800680','ERIC'); return false;" href="http://eric.ed.gov/?q=Computer+AND+coding&pg=4&id=EJ800680"><span id="translatedtitle"><span class="hlt">Revisiting</span> Methodological Issues in Transcript Analysis: Negotiated Coding and Reliability</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Garrison, D. R.; Cleveland-Innes, M.; Koole, Marguerite; Kappelman, James</p> <p>2006-01-01</p> <p>Transcript analysis is an important methodology to study asynchronous online educational discourse. The purpose of this study is to <span class="hlt">revisit</span> reliability and validity issues associated with transcript analysis. The goal is to provide researchers with guidance in coding transcripts. For validity reasons, it is suggested that the first step is to…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=what&id=EJ997440','ERIC'); return false;" href="http://eric.ed.gov/?q=what&id=EJ997440"><span id="translatedtitle">Educational Administration and the Management of Knowledge: 1980 <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bates, Richard</p> <p>2013-01-01</p> <p>This paper <span class="hlt">revisits</span> the thesis of a 1980 paper that suggested a new approach to educational administration based upon the New Sociology of Education. In particular it updates answers to the six key questions asked by that paper: what counts as knowledge; how is what counts as knowledge organised; how is what counts as knowledge transmitted; how is</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016EJPh...37a5402N','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016EJPh...37a5402N"><span id="translatedtitle"><span class="hlt">Revisiting</span> the quantum harmonic oscillator via unilateral Fourier transforms</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Nogueira, Pedro H. F.; de Castro, Antonio S.</p> <p>2016-01-01</p> <p>The literature on the exponential Fourier approach to the one-dimensional quantum harmonic oscillator problem is revised and criticized. It is shown that the solution of this problem has been built on faulty premises. The problem is <span class="hlt">revisited</span> via the Fourier sine and cosine transform method and the stationary states are properly determined by requiring definite parity and square-integrable eigenfunctions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015PhyS...90k8001N','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015PhyS...90k8001N"><span id="translatedtitle">Bohr’s ‘Light and Life’ <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Nussenzveig, H. M.</p> <p>2015-11-01</p> <p>I <span class="hlt">revisit</span> Niels Bohr’s famous 1932 ‘Light and Life’ lecture, confronting it with current knowledge. Topics covered include: life origin and evolution, quantum mechanics and life, brain and mind, consciousness and free will, and light as a tool for biology, with special emphasis on optical tweezers and their contributions to biophysics. Specialized knowledge of biology is not assumed.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=organisational+AND+structure+AND+examples&pg=2&id=EJ927892','ERIC'); return false;" href="http://eric.ed.gov/?q=organisational+AND+structure+AND+examples&pg=2&id=EJ927892"><span id="translatedtitle">Pockets of Participation: <span class="hlt">Revisiting</span> Child-Centred Participation Research</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Franks, Myfanwy</p> <p>2011-01-01</p> <p>This article <span class="hlt">revisits</span> the theme of the clash of interests and power relations at work in participatory research which is prescribed from above. It offers a possible route toward solving conflict between adult-led research carried out by young researchers, funding requirements and organisational constraints. The article explores issues of…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=situ&pg=4&id=ED521859','ERIC'); return false;" href="http://eric.ed.gov/?q=situ&pg=4&id=ED521859"><span id="translatedtitle">The Importance of Being a Complement: CED Effects <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Jurka, Johannes</p> <p>2010-01-01</p> <p>This dissertation <span class="hlt">revisits</span> subject island effects (Ross 1967, Chomsky 1973) cross-linguistically. Controlled acceptability judgment studies in German, English, Japanese and Serbian show that extraction out of specifiers is consistently degraded compared to extraction out of complements, indicating that the Condition on Extraction domains (CED,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=%22mental+performance%22&pg=3&id=EJ784017','ERIC'); return false;" href="http://eric.ed.gov/?q=%22mental+performance%22&pg=3&id=EJ784017"><span id="translatedtitle">Instructional Efficiency: <span class="hlt">Revisiting</span> the Original Construct in Educational Research</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>van Gog, Tamara; Paas, Fred</p> <p>2008-01-01</p> <p>This article <span class="hlt">revisits</span> Paas and Van Merrienboer's (1993) measure of instructional efficiency, which can be applied by educational researchers to compare the effects of different instructional conditions on learning. This measure relied on performance and mental effort on the test, and as such gave an indication of the quality of learning outcomes.…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=pedagogical+AND+content+AND+knowledge&id=EJ1014895','ERIC'); return false;" href="http://eric.ed.gov/?q=pedagogical+AND+content+AND+knowledge&id=EJ1014895"><span id="translatedtitle">Threshold Concepts and Student Engagement: <span class="hlt">Revisiting</span> Pedagogical Content Knowledge</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Zepke, Nick</p> <p>2013-01-01</p> <p>This article <span class="hlt">revisits</span> the notion that to facilitate quality learning requires teachers in higher education to have pedagogical content knowledge. It constructs pedagogical content knowledge as a teaching and learning space that brings content and pedagogy together. On the content knowledge side, it suggests that threshold concepts, akin to a…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=extraction&id=ED521859','ERIC'); return false;" href="http://eric.ed.gov/?q=extraction&id=ED521859"><span id="translatedtitle">The Importance of Being a Complement: CED Effects <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Jurka, Johannes</p> <p>2010-01-01</p> <p>This dissertation <span class="hlt">revisits</span> subject island effects (Ross 1967, Chomsky 1973) cross-linguistically. Controlled acceptability judgment studies in German, English, Japanese and Serbian show that extraction out of specifiers is consistently degraded compared to extraction out of complements, indicating that the Condition on Extraction domains (CED,</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=administration&pg=5&id=EJ997440','ERIC'); return false;" href="http://eric.ed.gov/?q=administration&pg=5&id=EJ997440"><span id="translatedtitle">Educational Administration and the Management of Knowledge: 1980 <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bates, Richard</p> <p>2013-01-01</p> <p>This paper <span class="hlt">revisits</span> the thesis of a 1980 paper that suggested a new approach to educational administration based upon the New Sociology of Education. In particular it updates answers to the six key questions asked by that paper: what counts as knowledge; how is what counts as knowledge organised; how is what counts as knowledge transmitted; how is…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=self-regulated+AND+learning&pg=6&id=EJ1015520','ERIC'); return false;" href="http://eric.ed.gov/?q=self-regulated+AND+learning&pg=6&id=EJ1015520"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Trust Effect in Urban Elementary Schools</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Adams, Curt M.; Forsyth, Patrick B.</p> <p>2013-01-01</p> <p>More than a decade after Goddard, Tschannen-Moran, and Hoy (2001) found that collective faculty trust in clients predicts student achievement in urban elementary schools, we sought to identify a plausible link for this relationship. Our purpose in <span class="hlt">revisiting</span> the trust effect was twofold: (1) to test the main effect of collective faculty trust on…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Recent+AND+Developments+AND+Economics+AND+Time&pg=6&id=EJ883049','ERIC'); return false;" href="http://eric.ed.gov/?q=Recent+AND+Developments+AND+Economics+AND+Time&pg=6&id=EJ883049"><span id="translatedtitle">Children's Social Play Sequence: Parten's Classic Theory <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Xu, Yaoying</p> <p>2010-01-01</p> <p>The purpose of this article is to <span class="hlt">revisit</span> Parten's study on social play from cultural, environmental, social and economic aspects. Young children's social play is viewed as a critical means to foster and enhance language, cognitive, social and emotional development. Social play theory has been predominately viewed from developmental perspectives.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016MNRAS.tmp..688M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016MNRAS.tmp..688M"><span id="translatedtitle"><span class="hlt">Revisiting</span> the OH-CH correlation in diffuse clouds</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Mookerjea, Bhaswati</p> <p>2016-04-01</p> <p>Based on the analysis of available published data and archival data along 24 sightlines (5 of which are new) we derive more accurate estimates of the column densities of OH and CH towards diffuse/translucent clouds and <span class="hlt">revisit</span> the typically observed correlation between the abundances of these species. The increase in the sample size was possible because of the equivalence of the column densities of CH derived from a combination of the transitions at 3137 & 3143 Å, and a combination of transitions at 3886 & 3890 Å, which we have demonstrated here. We find that with the exception of four diffuse clouds, the entire source sample shows a clear correlation between the column densities of OH and CH similar to previous observations. The analysis presented also verifies the theoretically predicted oscillator strengths of the OH A-X (3078 & 3082 Å), CH B-X (3886 & 3890 Å) and C-X (3137 & 3143Å) transitions. We estimate N(H) and N(H2) from the observed E(B - V) and N(CH) respectively. The N(OH)/N(CH) ratio is not correlated with the molecular fraction of hydrogen in the diffuse/translucent clouds. We show that with the exception of HD 34078 for all the clouds the observed column density ratios of CH and OH can be reproduced by simple chemical <span class="hlt">models</span> which include gas-grain interaction and gas-phase chemistry. The enhanced N(OH)/N(CH) ratio seen towards the 3 new sightlines can be reproduced primarily by considering different cosmic ray ionization rates.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://ntrs.nasa.gov/search.jsp?R=20040062090&hterms=thorium&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dthorium','NASA-TRS'); return false;" href="http://ntrs.nasa.gov/search.jsp?R=20040062090&hterms=thorium&qs=N%3D0%26Ntk%3DAll%26Ntx%3Dmode%2Bmatchall%26Ntt%3Dthorium"><span id="translatedtitle"><span class="hlt">Revisiting</span> the Interpretation of Thorium Abundances at Hansteen Alpha</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p>Lawrence, D. J.; Hawke, B. R.; Elphic, R. C.; Feldman, W. C.; Prettyman, T. H.; Vaniman, D. T.</p> <p>2004-01-01</p> <p>Hansteen Alpha is one of the few remaining locations on the Moon thought to be formed by highlands volcanism. Hansteen Alpha is a triangular shaped feature located in the southern portion of Oceanus Procellarum (12 degrees W, 50 degrees S) and its size is approximately 25 km on each side. As described by Hawke et al., there is clear evidence that: 1) Hansteen Alpha was emplaced by extrusive volcanic processes; and 2) it was formed by a viscous lava that should be enriched in Th. However, in the study of Hawke et al. using available Lunar Prospector (LP) Th data, it was concluded that the Hansteen Alpha region was not greatly enriched in Th as would be expected for a highly evolved, viscous lava. It was further concluded based on other compositional data that the magma that formed Hansteen Alpha did not correspond to any known rock type. Here we <span class="hlt">revisit</span> the interpretation of Th abundances at Hansteen Alpha for a couple of reasons. First, the size of Hansteen Alpha is smaller than the spatial resolution of the LP Gamma-ray Spectrometer (LP-GRS) from which the Th abundances were derived. Therefore, the LP-GRS pixels covering Hansteen Alpha may not truly represent the Th abundance of the Hansteen Alpha feature. Second, recent work has led to a much greater understanding of the Th spatial distribution for small-area features on the lunar surface. In particular, using forward <span class="hlt">modeling</span> techniques, we have developed the ability to obtain information about Th abundances for features that are at or smaller than the FWHM spatial resolution (approximately [80 square kilometers]) of the LP-GRS data.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4547714','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4547714"><span id="translatedtitle">The Lumbar Lordosis in Males and Females, <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Hay, Ori; Dar, Gali; Abbas, Janan; Stein, Dan; May, Hila; Masharawi, Youssef; Peled, Nathan; Hershkovitz, Israel</p> <p>2015-01-01</p> <p>Background Whether differences exist in male and female lumbar lordosis has been debated by researchers who are divided as to the nature of variations in the spinal curve, their origin, reasoning, and implications from a morphological, functional and evolutionary perspective. Evaluation of the spinal curvature is constructive in understanding the evolution of the spine, as well as its pathology, planning of surgical procedures, monitoring its progression and treatment of spinal deformities. The aim of the current study was to <span class="hlt">revisit</span> the nature of lumbar curve in males and females. Methods Our new automated method uses CT imaging of the spine to measure lumbar curvature in males and females. The curves extracted from 158 individuals were based on the spinal canal, thus avoiding traditional pitfalls of using bone features for curve estimation. The <span class="hlt">model</span> analysis was carried out on the entire curve, whereby both local and global descriptors were examined in a single framework. Six parameters were calculated: segment length, curve length, curvedness, lordosis peak location, lordosis cranial peak height, and lordosis caudal peak height. Principal Findings Compared to males, the female spine manifested a statistically significant greater curvature, a caudally located lordotic peak, and greater cranial peak height. As caudal peak height is similar for males and females, the illusion of deeper lordosis among females is due partially to the fact that the upper part of the female lumbar curve is positioned more dorsally (more backwardly inclined). Conclusions Males and females manifest different lumbar curve shape, yet similar amount of inward curving (lordosis). The morphological characteristics of the female spine were probably developed to reduce stress on the vertebral elements during pregnancy and nursing. PMID:26301782</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li class="active"><span>23</span></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_23 --> <div id="page_24" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li class="active"><span>24</span></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="461"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016PhLB..753..140P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016PhLB..753..140P"><span id="translatedtitle"><span class="hlt">Revisiting</span> perfect fluid dark matter: Observational constraints from our galaxy</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Potapov, Alexander A.; Garipova, Guzel M.; Nandi, Kamal K.</p> <p>2016-02-01</p> <p>We <span class="hlt">revisit</span> certain features of an assumed spherically symmetric perfect fluid dark matter halo in the light of the observed data of our galaxy, the Milky Way (MW). The idea is to apply the Faber-Visser approach of combined observations of rotation curves and lensing to a first post-Newtonian approximation to "measure" the equation of state ω (r) of the perfect fluid galactic halo. However, for the <span class="hlt">model</span> considered here, no constraints from lensing are used as it will be sufficient to consider only the rotation curve observations. The lensing mass together with other masses will be just computed using recent data. Since the halo has attractive gravity, we shall impose the constraint that ω (r) ≥ 0 for r ≤RMW, where RMW ˜ 200 kpc is the adopted halo radius of our galaxy. The observed circular velocity ℓ (= 2 vc2 / c02) from the flat rotation curve and a crucial adjustable parameter D appearing in the perfect fluid solution then yield different numerical ranges of ω (r). It is demonstrated that the computed observables such as the rotation curve mass, the lens mass, the post-Newtonian mass of our galaxy compare well with the recent mass data. We also calculate the Faber-Visser χ-factor, which is a measure of pressure content in the dark matter. Our analysis indicates that a range 0 ≤ ω (r) ≤ 2.8 ×10-7 for the perfect fluid dark matter can reasonably describe the attractive galactic halo. This is a strong constraint indicating a dust-like CDM halo (ω ˜ 0) supported also by CMB constraints.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFMNH14A..04S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFMNH14A..04S"><span id="translatedtitle">High Resolution Rapid <span class="hlt">Revisits</span> Insar Monitoring of Surface Deformation</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Singhroy, V.; Li, J.; Charbonneau, F.</p> <p>2014-12-01</p> <p>Monitoring surface deformation on strategic energy and transportation corridors requires high resolution spatial and temporal InSAR images for mitigation and safety purposes. High resolution air photos, lidar and other satellite images are very useful in areas where the landslides can be fatal. Recently, radar interferometry (InSAR) techniques using more rapid <span class="hlt">revisit</span> images from several radar satellites are increasingly being used in active deformation monitoring. The Canadian RADARSAT Constellation (RCM) is a three-satellite mission that will provide rapid <span class="hlt">revisits</span> of four days interferometric (InSAR) capabilities that will be very useful for complex deformation monitoring. For instance, the monitoring of surface deformation due to permafrost activity, complex rock slide motion and steam assisted oil extraction will benefit from this new rapid <span class="hlt">revisit</span> capability. This paper provide examples of how the high resolution (1-3 m) rapid <span class="hlt">revisit</span> InSAR capabilities will improve our monitoring of surface deformation and provide insights in understanding triggering mechanisms. We analysed over a hundred high resolution InSAR images over a two year period on three geologically different sites with various configurations of topography, geomorphology, and geology conditions. We show from our analysis that the more frequent InSAR acquisitions are providing more information in understanding the rates of movement and failure process of permafrost triggered retrogressive thaw flows; the complex motion of an asymmetrical wedge failure of an active rock slide and the identification of over pressure zones related to oil extraction using steam injection. Keywords: High resolution, InSAR, rapid <span class="hlt">revisits</span>, triggering mechanisms, oil extraction.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/18444756','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/18444756"><span id="translatedtitle"><span class="hlt">Revisiting</span> evidence for modularity and functional equivalence across verbal and spatial domains in memory.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Guérard, Katherine; Tremblay, Sébastien</p> <p>2008-05-01</p> <p>The authors <span class="hlt">revisited</span> evidence in favor of modularity and of functional equivalence between the processing of verbal and spatial information in short-term memory. This was done by investigating the patterns of intrusions, omissions, transpositions, and fill-ins in verbal and spatial serial recall and order reconstruction tasks under control, articulatory suppression, and spatial tapping conditions. The authors observed that when tasks were fully equated, all patterns of errors were equivalent between the verbal and spatial domains. Moreover, articulatory suppression interfered more with the verbal memory tasks than with the spatial memory tasks. This interference was mostly due to an increase of omissions and transpositions. Similarly, tapping was more disruptive of spatial memory than of verbal memory tasks and affected primarily the number of omissions and transpositions. The patterns of errors and their interaction with interference are discussed in light of the predominant approaches to <span class="hlt">modeling</span> memory and provide a rich set of data for <span class="hlt">modeling</span> efforts. PMID:18444756</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26882021','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26882021"><span id="translatedtitle">Vacuum Ultraviolet Photodissociation and Fourier Transform-Ion Cyclotron Resonance (FT-ICR) Mass Spectrometry: <span class="hlt">Revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Shaw, Jared B; Robinson, Errol W; Paša-Tolić, Ljiljana</p> <p>2016-03-15</p> <p>We <span class="hlt">revisited</span> the implementation of 193 nm ultraviolet photodissociation (UVPD) within the ion cyclotron resonance (ICR) cell of a Fourier transform-ion cyclotron resonance (FT-ICR) mass spectrometer. UVPD performance characteristics were examined in the context of recent developments in the understanding of UVPD and in-cell tandem mass spectrometry. Efficient UVPD and photo-ECD of a <span class="hlt">model</span> peptide and proteins within the ICR cell of a FT-ICR mass spectrometer are accomplished through appropriate modulation of laser pulse timing, relative to ion magnetron motion and the potential applied to an ion optical element upon which photons impinge. It is shown that UVPD yields efficient and extensive fragmentation, resulting in excellent sequence coverage for <span class="hlt">model</span> peptide and protein cations. PMID:26882021</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015EPJA...51..105Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015EPJA...51..105Z"><span id="translatedtitle">resonance contribution to two-photon exchange in electron-proton scattering <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zhou, Hai-Qing; Yang, Shin Nan</p> <p>2015-08-01</p> <p>We <span class="hlt">revisit</span> the question of the contributions of the two-photon exchange with excitation to the electron-proton scattering in a hadronic <span class="hlt">model</span>. Three improvements over the previous calculations are made, namely, correct vertex function for , realistic form factors, and coupling constants. The discrepancy between the values of extracted from Rosenbluth technique and polarization transfer method can be reasonably accounted for if the data of Andivahis et al. (Phys. Rev. D 50, 5491 (1994)) are analyzed. However, substantial discrepancy remains if the data of Qattan et al. (nucl-ex/0610006) are used. For the ratio between scatterings, our predictions appear to be in satisfactory agreement with the preliminary data from VEPP-3. The agreement between our <span class="hlt">model</span> predictions and the recent measurements on single spin asymmetry, transverse and longitudinal recoil proton polarizations ranges from good to poor.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4695851','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4695851"><span id="translatedtitle">Active Nuclear Import of Membrane Proteins <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Laba, Justyna K.; Steen, Anton; Popken, Petra; Chernova, Alina; Poolman, Bert; Veenhoff, Liesbeth M.</p> <p>2015-01-01</p> <p>It is poorly understood how membrane proteins destined for the inner nuclear membrane pass the crowded environment of the Nuclear Pore Complex (NPC). For the Saccharomyces cerevisiae proteins Src1/Heh1 and Heh2, a transport mechanism was proposed where the transmembrane domains diffuse through the membrane while the extralumenal domains encoding a nuclear localization signal (NLS) and intrinsically disordered linker (L) are accompanied by transport factors and travel through the NPC. Here, we validate the proposed mechanism and explore and discuss alternative interpretations of the data. First, to disprove an interpretation where the membrane proteins become membrane embedded only after nuclear import, we present biochemical and localization data to support that the previously used, as well as newly designed reporter proteins are membrane-embedded irrespective of the presence of the sorting signals, the specific transmembrane domain (multipass or tail anchored), independent of GET, and also under conditions that the proteins are trapped in the NPC. Second, using the recently established size limit for passive diffusion of membrane proteins in yeast, and using an improved assay, we confirm active import of polytopic membrane protein with extralumenal soluble domains larger than those that can pass by diffusion on similar timescales. This reinforces that NLS-L dependent active transport is distinct from passive diffusion. Thirdly, we <span class="hlt">revisit</span> the proposed route through the center of the NPC and conclude that the previously used trapping assay is, unfortunately, poorly suited to address the route through the NPC, and the route thus remains unresolved. Apart from the uncertainty about the route through the NPC, the data confirm active, transport factor dependent, nuclear transport of membrane-embedded mono- and polytopic membrane proteins in baker’s yeast. PMID:26473931</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015ClDy...45.3527M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015ClDy...45.3527M"><span id="translatedtitle"><span class="hlt">Revisiting</span> El Niño Modokis</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Marathe, Shamal; Ashok, Karumuri; Swapna, P.; Sabin, T. P.</p> <p>2015-12-01</p> <p>The suggestion that there exist two types of El Niño in the tropical Pacific has generated a debate in the community. Applying various linear and non-linear approaches and composite analysis technique on observed and reanalyzed climate datasets primarily for the 1950-2010 period, we <span class="hlt">revisit</span> the variability of the tropical Pacific in the light of this debate. Our objective is to examine whether the proposed El Niño Modokis need a classification distinct from canonical El Niños. Even if the distinction is subject to short data records, we demonstrate that the El Niño Modoki events indeed display a seasonal evolution and teleconnections different from the canonical El Niños, and that the distinction is not subject to inclusion of the two extreme El Niños 1982 and 1997 as canonical El Niños. We show that the El Niño Modoki events are not an artifact associated with the orthogonality constraint associated with the EOF technique. Our cluster analysis shows that evolutions of the canonical El Niño and El Niño Modokis through various seasons differ from one another. Importantly, the dynamic and thermodynamic air-sea coupling strength is distinctly different between the El Niño Modoki and the canonical El Niño events. We find that, dynamic feedback intensity is stronger for El Niño Modoki (canonical El Niño) during boreal summer (winter); though the air-sea coupling strength, a major contributor to Bjerknes feedback, is maximum for Modokis during the developing stages, it decreases thereafter. In case of thermodynamic feedback intensity, SST-wind-evaporation feedback is dominant for El Niños while SST-SHF feedback is important during El Niño Modokis. However, we find that the thermodynamic feedback values significantly differ across the flux datasets.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015PhPl...22b2103A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015PhPl...22b2103A"><span id="translatedtitle">Hydrodynamic limit of Wigner-Poisson kinetic theory: <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Akbari-Moghanjoughi, M.</p> <p>2015-02-01</p> <p>In this paper, we <span class="hlt">revisit</span> the hydrodynamic limit of the Langmuir wave dispersion relation based on the Wigner-Poisson <span class="hlt">model</span> in connection with that obtained directly from the original Lindhard dielectric function based on the random-phase-approximation. It is observed that the (fourth-order) expansion of the exact Lindhard dielectric constant correctly reduces to the hydrodynamic dispersion relation with an additional term of fourth-order, beside that caused by the quantum diffraction effect. It is also revealed that the generalized Lindhard dielectric theory accounts for the recently discovered Shukla-Eliasson attractive potential (SEAP). However, the expansion of the exact Lindhard static dielectric function leads to a k4 term of different magnitude than that obtained from the linearized quantum hydrodynamics <span class="hlt">model</span>. It is shown that a correction factor of 1/9 should be included in the term arising from the quantum Bohm potential of the momentum balance equation in fluid <span class="hlt">model</span> in order for a correct plasma dielectric response treatment. Finally, it is observed that the long-range oscillatory screening potential (Friedel oscillations) of type cos ( 2 k F r ) / r 3 , which is a consequence of the divergence of the dielectric function at point k = 2kF in a quantum plasma, arises due to the finiteness of the Fermi-wavenumber and is smeared out in the limit of very high electron number-densities, typical of white dwarfs and neutron stars. In the very low electron number-density regime, typical of semiconductors and metals, where the Friedel oscillation wavelength becomes much larger compared to the interparticle distances, the SEAP appears with a much deeper potential valley. It is remarked that the fourth-order approximate Lindhard dielectric constant approaches that of the linearized quantum hydrodynamic in the limit if very high electron number-density. By evaluation of the imaginary part of the Lindhard dielectric function, it is shown that the Landau-damping region in ω-k plane increases dramatically by increase of the electron number-density.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/biblio/22408056','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/biblio/22408056"><span id="translatedtitle">Hydrodynamic limit of Wigner-Poisson kinetic theory: <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Akbari-Moghanjoughi, M.</p> <p>2015-02-15</p> <p>In this paper, we <span class="hlt">revisit</span> the hydrodynamic limit of the Langmuir wave dispersion relation based on the Wigner-Poisson <span class="hlt">model</span> in connection with that obtained directly from the original Lindhard dielectric function based on the random-phase-approximation. It is observed that the (fourth-order) expansion of the exact Lindhard dielectric constant correctly reduces to the hydrodynamic dispersion relation with an additional term of fourth-order, beside that caused by the quantum diffraction effect. It is also revealed that the generalized Lindhard dielectric theory accounts for the recently discovered Shukla-Eliasson attractive potential (SEAP). However, the expansion of the exact Lindhard static dielectric function leads to a k{sup 4} term of different magnitude than that obtained from the linearized quantum hydrodynamics <span class="hlt">model</span>. It is shown that a correction factor of 1/9 should be included in the term arising from the quantum Bohm potential of the momentum balance equation in fluid <span class="hlt">model</span> in order for a correct plasma dielectric response treatment. Finally, it is observed that the long-range oscillatory screening potential (Friedel oscillations) of type cos(2k{sub F}r)/r{sup 3}, which is a consequence of the divergence of the dielectric function at point k = 2k{sub F} in a quantum plasma, arises due to the finiteness of the Fermi-wavenumber and is smeared out in the limit of very high electron number-densities, typical of white dwarfs and neutron stars. In the very low electron number-density regime, typical of semiconductors and metals, where the Friedel oscillation wavelength becomes much larger compared to the interparticle distances, the SEAP appears with a much deeper potential valley. It is remarked that the fourth-order approximate Lindhard dielectric constant approaches that of the linearized quantum hydrodynamic in the limit if very high electron number-density. By evaluation of the imaginary part of the Lindhard dielectric function, it is shown that the Landau-damping region in ω-k plane increases dramatically by increase of the electron number-density.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014EGUGA..16.5062S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014EGUGA..16.5062S"><span id="translatedtitle">Mountain Wave-Induced Turbulence - "Lower Turbulent Zones" <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Strauss, Lukas; Grubišić, Vanda; Serafin, Stefano; Mühlgassner, Rita</p> <p>2014-05-01</p> <p>In their seminal 1974 paper on "Lower Turbulent Zones Associated with Mountain Lee Waves" P. F. Lester and W. A. Fingerhut attempted to characterize regions of low-level turbulence in the lee of mountain ranges that are commonly associated with large-amplitude mountain waves aloft. For their study, they made extensive use of airborne measurements with small research aircraft that penetrated into the "lower turbulent zone" (LTZ). The Lester and Fingerhut study complemented previous work on wave-induced LTZs by J. P. Kuettner and others in the 1950s who were among the first to employ sailplanes as scientific measurement platforms. Given the limitations of scientific instrumentation on research aircraft in the 1970s (e.g., no GPS) and, in particular, on sailplanes in the 1950s, credit has to be given to these authors for their remarkably detailed account and classification of LTZs. Ever since then, scientists have been trying to refine the conceptual <span class="hlt">model</span> of the LTZ and shed more light on the origin of turbulence therein. The Terrain-Induced Rotor Experiment (T-REX, Sierra Nevada, California, 2006) is the most recent, major effort organized to investigate the characteristics of LTZs by studying the coupled mountain-wave, rotor, and boundary-layer system. During T-REX, comprehensive ground-based and airborne, in situ and remote sensing measurements were collected during 15 Intensive Observation Periods (IOPs). In this study, we make use of the extensive T-REX datasets to <span class="hlt">revisit</span> the LTZ concept. During T-REX IOPs, the University of Wyoming King Air (UWKA) research aircraft flew straight-and-level legs aligned with the mean wind direction to document the variation of flow and turbulence over and downwind of the Sierra Nevada. In order to characterize the structure and intensity of turbulence within the LTZ, turbulent kinetic energy (TKE) and eddy-dissipation rate (EDR) were computed from UWKA research flights. In contrast to the rough average values of TKE and EDR obtained by Lester and Fingerhut, high-rate measurements by the UWKA allow documentation of the turbulent flow field at unprecedented spatial resolution and accuracy. Using TKE and EDR obtained from UWKA measurements from the T-REX IOPs with strong low-level turbulence, an attempt is made to summarize the T-REX findings on low-level turbulence and place them in the context of the extant conceptual <span class="hlt">models</span> of the LTZ. Given the rich variety and complexity of mountain-wave cases observed during the campaign, simple conceptual <span class="hlt">models</span>, while helpful, provide merely rough guidelines for a possible LTZ classification.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFM.S13B4447G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFM.S13B4447G"><span id="translatedtitle">Five years on: <span class="hlt">Revisiting</span> GSN data quality</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Gee, L. S.; Nettles, M.; Ekstrom, G.; Davis, J. P.; Ringler, A. T.; Storm, T. L.; Wilson, D.; Anderson, K. R.</p> <p>2014-12-01</p> <p>In 2010, the Lamont Waveform Quality Center (WQC) conducted an in-depth review of ten stations in the Global Seismographic Network (GSN). IU stations (CASY, DAV, KIP, KONO, WCI), IC stations (SSE, XAN), and II stations (ALE, DGAR, RPN) were analyzed using a scaling analysis based on data-synthetic comparisons, evaluation of noise levels, assessment of inter-sensor coherence, and polarization analysis. These reports (available from http://www.ldeo.columbia.edu/~ekstrom/Projects/WQC.html) highlighted a number of significant problems in GSN data quality, including the frequency-dependent loss of gain in the STS-1 seismometer (Ekström et al., 2006) that has been attributed to the presence of humidity in the electronics, cables, and connectors (Yuki and Ishihara, 2002; Hutt and Ringler, 2011). The reports from the WQC spurred a number of changes in the operation of the GSN, including the adoption of the policy of annual calibrations and the development of new tools and metrics to monitor, evaluate, and communicate data quality. In parallel, the USGS' Albuquerque Seismological Laboratory (ASL) and UCSD's Project IDA worked with the IRIS Consortium to upgrade GSN stations with new data acquisition systems, to refurbish the STS-1 seismometers with new electronics, and to expand the deployment of secondary broadband sensors. We <span class="hlt">revisit</span> the 2010 reports, using the tools of the WQC as well as a number of newly developed tools such as the USGS' Data Quality Analyzer and IRIS' MUSTANG, and provide an update on GSN data quality. Our initial focus is on CASY and KIP, the first two stations reviewed by the WQC. Our goal is to evaluate progress in the last five years and assess our ability to quantify data quality as well as to identify potential problems that could compromise data quality in the future. Ekström, G., C. A. Dalton, and M. Nettles (2006). Observations of time-dependent errors in long-period instrument gain at global seismic stations. Seismological Research Letters, 77 (1), 12-22. Hutt, C.R. and A.T. Ringler (2011). Some possible causes of and corrections for STS-1 response changes in the Global Seismographic Network, Seis. Res. Lett., 82 (4), 560-571. Yuki, Y., and Y. Ishihara (2002). Methods for maintaining the performance of STS-1 seismometer. Frontier Research on Earth Evolution 2, 1-5.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009AIPC.1094..792D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009AIPC.1094..792D"><span id="translatedtitle">Mass-Radius relation of low-mass stars <span class="hlt">revisited</span> with the VLTI</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Demory, B.-O.; Ségransan, D.; Forveille, T.; Queloz, D.; Delfosse, X.; Perrier, C.</p> <p>2009-02-01</p> <p>We report the measurements of 5 single, low-mass and very low-mass stars angular diameter obtained with VINCI (VLT Interferometer Commissioning Instrument) in 2002 and AMBER (Astronomical Multi-BEam Recombiner) since 2007 on the VLTI array. We determined radii with accuracies of 1 to 5% for low-mass and very low mass stars ranging from M5.5V to K0.5V, thus encompassing a good fraction of the M-R relation for low-mass stars. Those results allow to <span class="hlt">revisit</span> the current state of mass-radius relation for those objects from which a good agreement with <span class="hlt">models</span> is shown up to about 0.6-0.7 solar masses. We explore remaining discrepancies in the upper part of the mass-radius relation and point out effects that may be due to stellar metallicity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014JPhA...47.5002S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014JPhA...47.5002S"><span id="translatedtitle">Legendre structure of κ-thermostatistics <span class="hlt">revisited</span> in the framework of information geometry</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Scarfone, A. M.; Wada, T.</p> <p>2014-07-01</p> <p>Information geometry is a powerful framework in which to study families of probability distributions or statistical <span class="hlt">models</span> by applying differential geometric tools. It provides a useful framework for deriving many important structures in probability theory by identifying the space of probability distributions with a differentiable manifold endowed with a Riemannian metric. In this paper, we <span class="hlt">revisit</span> some aspects concerning the κ-thermostatistics based on the entropy Sκ in the framework of information geometry. After introducing the dually flat structure associated with the κ-distribution, we show that the dual potentials derived in the formalism of information geometry correspond to the generalized Massieu function Φκ and the generalized entropy Sκ characterizing the Legendre structure of the κ-deformed statistical mechanics. In addition, we obtain several quantities, such as escort distributions and canonical divergence, relevant for the further development of the theory.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=schema&pg=5&id=EJ782529','ERIC'); return false;" href="http://eric.ed.gov/?q=schema&pg=5&id=EJ782529"><span id="translatedtitle">Unwarranted Return: A Response to McVee, Dunsmore, and Gavelek's (2005) "Schema Theory <span class="hlt">Revisited</span>"</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Krasny, Karen A.; Sadoski, Mark; Paivio, Allan</p> <p>2007-01-01</p> <p>This article presents the authors' response to McVee, Dunsmore, and Gavelek's "Schema Theory <span class="hlt">Revisited</span>." In "Schema Theory <span class="hlt">Revisited</span>," McVee, Dunsmore, and Gavelek (2005) proposed a rearticulation of schema theory intended to encompass the ideas that schemata and other cognitive processes are embodied, that knowledge is situated in the transaction…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=vee&id=EJ782529','ERIC'); return false;" href="http://eric.ed.gov/?q=vee&id=EJ782529"><span id="translatedtitle">Unwarranted Return: A Response to McVee, Dunsmore, and Gavelek's (2005) "Schema Theory <span class="hlt">Revisited</span>"</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Krasny, Karen A.; Sadoski, Mark; Paivio, Allan</p> <p>2007-01-01</p> <p>This article presents the authors' response to McVee, Dunsmore, and Gavelek's "Schema Theory <span class="hlt">Revisited</span>." In "Schema Theory <span class="hlt">Revisited</span>," McVee, Dunsmore, and Gavelek (2005) proposed a rearticulation of schema theory intended to encompass the ideas that schemata and other cognitive processes are embodied, that knowledge is situated in the transaction</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26641279','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26641279"><span id="translatedtitle">Enthalpy-Entropy Compensation (EEC) Effect: A <span class="hlt">Revisit</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Pan, Animesh; Biswas, Tapas; Rakshit, Animesh K; Moulik, Satya P</p> <p>2015-12-31</p> <p>A short account of the developments and perspectives of IKR (iso-kinetic relation) and EEC (enthalpy (H) - entropy (S) compensation) has been presented. The IKR and EEC are known to be extra thermodynamic or empirical correlations though linear H-S correlation can be thermodynamically deduced. Attempt has also been made to explain the phenomena in terms of statistical thermodynamics. In this study, we have briefly <span class="hlt">revisited</span> the fundamentals of both IKR and EEC from kinetic and thermodynamic grounds. A detailed <span class="hlt">revisit</span> of the EEC phenomenon on varied kinetic and equilibrium processes has been also presented. Possible correlations among the free energy (ΔG), enthalpy (ΔH), and entropy (ΔS) changes of different similar and nonsimilar chemical processes under varied conditions have been discussed with possible future projections. PMID:26641279</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/104960','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/104960"><span id="translatedtitle">Indoor air and human health <span class="hlt">revisited</span>: A recent IAQ symposium</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Gammage, R.B.</p> <p>1994-12-31</p> <p>Indoor Air and Human Health <span class="hlt">Revisited</span> was a speciality symposium examining the scientific underpinnings of sensory and sensitivity effects, allergy and respiratory disease, neurotoxicity and cancer. An organizing committee selected four persons to chain the sessions and invite experts to give state-of-the-art presentations that will be published as a book. A summary of the presentations is made and some critical issues identified.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=lightning+AND+model&id=EJ825959','ERIC'); return false;" href="http://eric.ed.gov/?q=lightning+AND+model&id=EJ825959"><span id="translatedtitle"><span class="hlt">Modelling</span> Digital Thunder</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Blanco, Francesco; La Rocca, Paola; Petta, Catia; Riggi, Francesco</p> <p>2009-01-01</p> <p>An educational <span class="hlt">model</span> simulation of the sound produced by lightning in the sky has been employed to demonstrate realistic signatures of thunder and its connection to the particular structure of the lightning channel. Algorithms used in the past have been <span class="hlt">revisited</span> and implemented, making use of current computer techniques. The basic properties of…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26579744','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26579744"><span id="translatedtitle">Diffusion Monte Carlo Study of Para-Diiodobenzene Polymorphism <span class="hlt">Revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hongo, Kenta; Watson, Mark A; Iitaka, Toshiaki; Aspuru-Guzik, Alán; Maezono, Ryo</p> <p>2015-03-10</p> <p>We <span class="hlt">revisit</span> our investigation of the diffusion Monte Carlo (DMC) simulation of para-diiodobenzene (p-DIB) molecular crystal polymorphism. [See J. Phys. Chem. Lett. 2010, 1, 1789-1794.] We perform, for the first time, a rigorous study of finite-size effects and choice of nodal surface on the prediction of polymorph stability in molecular crystals using fixed-node DMC. Our calculations are the largest that are currently feasible using the resources of the K-computer and provide insights into the formidable challenge of predicting such properties from first principles. In particular, we show that finite-size effects can influence the trial nodal surface of a small (1 × 1 × 1) simulation cell considerably. Therefore, we repeated our DMC simulations with a 1 × 3 × 3 simulation cell, which is the largest such calculation to date. We used a density functional theory (DFT) nodal surface generated with the PBE functional, and we accumulated statistical samples with ∼6.4 × 10(5) core hours for each polymorph. Our final results predict a polymorph stability that is consistent with experiment, but they also indicate that the results in our previous paper were somewhat fortuitous. We analyze the finite-size errors using <span class="hlt">model</span> periodic Coulomb (MPC) interactions and kinetic energy corrections, according to the CCMH scheme of Chiesa, Ceperley, Martin, and Holzmann. We investigate the dependence of the finite-size errors on different aspect ratios of the simulation cell (k-mesh convergence) in order to understand how to choose an appropriate ratio for the DMC calculations. Even in the most expensive simulations currently possible, we show that the finite size errors in the DMC total energies are much larger than the energy difference between the two polymorphs, although error cancellation means that the polymorph prediction is accurate. Finally, we found that the T-move scheme is essential for these massive DMC simulations in order to circumvent population explosions and large time-step biases. PMID:26579744</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015IJTP...54.4046F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015IJTP...54.4046F"><span id="translatedtitle">From Quantum Discord and Quantum Entanglement to Local Hidden Variable <span class="hlt">Models</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Fei, Shao-Ming</p> <p>2015-11-01</p> <p>We <span class="hlt">revisit</span> the quantum discord, quantum entanglement and local hidden variable <span class="hlt">models</span> in quantum mechanics, and present a kind of understanding of quantum states from the view of correlations given by the probability distributions of local measurements outcomes.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li class="active"><span>24</span></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_24 --> <div id="page_25" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li class="active"><span>25</span></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="481"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=residual&pg=2&id=EJ1019144','ERIC'); return false;" href="http://eric.ed.gov/?q=residual&pg=2&id=EJ1019144"><span id="translatedtitle">A Commentary on the Relationship between <span class="hlt">Model</span> Fit and Saturated Path <span class="hlt">Models</span> in Structural Equation <span class="hlt">Modeling</span> Applications</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Raykov, Tenko; Lee, Chun-Lung; Marcoulides, George A.; Chang, Chi</p> <p>2013-01-01</p> <p>The relationship between saturated path-analysis <span class="hlt">models</span> and their fit to data is <span class="hlt">revisited</span>. It is demonstrated that a saturated <span class="hlt">model</span> need not fit perfectly or even well a given data set when fit to the raw data is examined, a criterion currently frequently overlooked by researchers utilizing path analysis <span class="hlt">modeling</span> techniques. The potential of</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Path%2banalysis&id=EJ1019144','ERIC'); return false;" href="http://eric.ed.gov/?q=Path%2banalysis&id=EJ1019144"><span id="translatedtitle">A Commentary on the Relationship between <span class="hlt">Model</span> Fit and Saturated Path <span class="hlt">Models</span> in Structural Equation <span class="hlt">Modeling</span> Applications</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Raykov, Tenko; Lee, Chun-Lung; Marcoulides, George A.; Chang, Chi</p> <p>2013-01-01</p> <p>The relationship between saturated path-analysis <span class="hlt">models</span> and their fit to data is <span class="hlt">revisited</span>. It is demonstrated that a saturated <span class="hlt">model</span> need not fit perfectly or even well a given data set when fit to the raw data is examined, a criterion currently frequently overlooked by researchers utilizing path analysis <span class="hlt">modeling</span> techniques. The potential of…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED504673.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED504673.pdf"><span id="translatedtitle">Rapid Prototyping Instructional Design: <span class="hlt">Revisiting</span> the ISD <span class="hlt">Model</span></span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Daugherty, Jenny; Teng, Ya-Ting; Cornachione, Edgard</p> <p>2007-01-01</p> <p>An exploratory investigation, utilizing mixed methods, was used to examine the quality and usability of the product and the client's role within a rapid prototyping instructional design approach. Forty engineering and business undergraduates participating in a leadership training session and an instructional design team comprised the sample for…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=B+AND+F+AND+Skinner&pg=3&id=EJ732692','ERIC'); return false;" href="http://eric.ed.gov/?q=B+AND+F+AND+Skinner&pg=3&id=EJ732692"><span id="translatedtitle">Direct Instruction <span class="hlt">Revisited</span>: A Key <span class="hlt">Model</span> for Instructional Technology</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Magliaro, Susan G.; Lockee, Barbara B.; Burton, John K.</p> <p>2005-01-01</p> <p>Rooted in behavioral theory, particularly the radical or selectivist behaviorism of B.F. Skinner (1953, 1954, 1966, 1968, 1974), the direct instruction (DI) approach to teaching is now well into its third decade of influencing curriculum, instruction, and research. It is also in its third decade of controversy. Our purpose is to present the DI…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010JPhA...43U4012C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010JPhA...43U4012C"><span id="translatedtitle">Faraday effect <span class="hlt">revisited</span>: sum rules and convergence issues</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Cornean, Horia D.; Nenciu, Gheorghe</p> <p>2010-11-01</p> <p>This is the third paper of a series <span class="hlt">revisiting</span> the Faraday effect. The question of the absolute convergence of the sums over the band indices entering the Verdet constant is considered. In general, sum rules and traces per unit volume play an important role in solid-state physics, and they give rise to certain convergence problems widely ignored by physicists. We give a complete answer in the case of smooth potentials and formulate a number of open problems related to less regular perturbations.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2600524','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2600524"><span id="translatedtitle"><span class="hlt">Revisiting</span> a Constructive Classic: Wright's Physical Disability: A Psychosocial Approach</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Dunn, Dana S.; Elliott, Timothy R.</p> <p>2008-01-01</p> <p>Beatrice A. Wright's (1960) classic book, Physical Disability: A Psychological Approach is a landmark publication in rehabilitation psychology. The authors believe that Division 22's forthcoming 50th anniversary, the results of a recent survey on essential readings in rehabilitation psychology, and a public critique concerning the relevance of individuating language in psychology are compelling reasons for <span class="hlt">revisiting</span> the influence of Physical Disability. After discussing these catalysts, the authors review the book's history, scholarly impact, and link to positive disciplinary directions. The authors conclude by encouraging rehabilitation psychologists and other members of the discipline to (re)acquaint themselves with this important book and the timeless concepts it espouses. PMID:19079791</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009AmJPh..77..857V','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009AmJPh..77..857V"><span id="translatedtitle">Chaos control: The problem of a bouncing ball <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Vargas, M. Cristina; Huerta, D. A.; Sosa, Victor</p> <p>2009-09-01</p> <p>The problem of a body bouncing on a periodically oscillating surface is <span class="hlt">revisited</span> to demonstrate chaos control. When the bouncing body is magnetic, it is possible to modify its behavior by adding a magnetic driving force. The mechanism of chaos control may be understood by means of a mechanical analysis which shows that the main result of applying the driving force is to shift the bifurcation diagram in such a way that chaotic behavior is replaced by periodic behavior and vice versa. A simple experiment is presented, along with a numerical simulation, that provides insight into chaos control.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3839859','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3839859"><span id="translatedtitle">Rural-Nonrural Disparities in Postsecondary Educational Attainment <span class="hlt">Revisited</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Byun, Soo-yong; Meece, Judith L.; Irvin, Matthew J.</p> <p>2013-01-01</p> <p>Using data from the National Educational Longitudinal Study, this study <span class="hlt">revisited</span> rural-nonrural disparities in educational attainment by considering a comprehensive set of factors that constrain and support youth's college enrollment and degree completion. Results showed that rural students were more advantaged in community social resources compared to nonrural students, and these resources were associated with a significant increase in the likelihood of bachelor's degree attainment. Yet results confirmed that rural students lagged behind nonrural students in attaining a bachelor's degree largely due to their lower socioeconomic background. The findings present a more comprehensive picture of the complexity of geographic residence in shaping college enrollment and degree attainment. PMID:24285873</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/24574057','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/24574057"><span id="translatedtitle">Hyperbranched polymer stars with Gaussian chain statistics <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Polińska, P; Gillig, C; Wittmer, J P; Baschnagel, J</p> <p>2014-02-01</p> <p>Conformational properties of regular dendrimers and more general hyperbranched polymer stars with Gaussian statistics for the spacer chains between branching points are <span class="hlt">revisited</span> numerically. We investigate the scaling for asymptotically long chains especially for fractal dimensions df = 3 (marginally compact) and df = 2.5 (diffusion limited aggregation). Power-law stars obtained by imposing the number of additional arms per generation are compared to truly self-similar stars. We discuss effects of weak excluded-volume interactions and sketch the regime where the Gaussian approximation should hold in dense solutions and melts for sufficiently large spacer chains. PMID:24574057</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/22139263','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/22139263"><span id="translatedtitle">Modulational instability in a passive fiber cavity, <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zezyulin, D A; Konotop, V V; Taki, M</p> <p>2011-12-01</p> <p>Modulation instability in a passive fiber cavity is <span class="hlt">revisited</span>. We address the problem in the statement with a continuous-time Ikeda map, rather than in the mean-field limit. It is found that plane wave solutions are unstable for both normal and anomalous dispersion regimes of an optical fiber. The origin of the instability in the continuous-time Ikeda map is in the mode mixing introduced by the beam splitter. The obtained conditions for the instability were compared with ones known for the discrete-time Ikeda map, showing appreciable difference, which, however reduces in the mean-field limit. PMID:22139263</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/211290','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/211290"><span id="translatedtitle">Habitat destruction and the extinction debt <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Loehle, C.</p> <p>1996-02-01</p> <p>A very important analysis of the problem of habitat destruction concluded that such destruction may lead to an extinction debt, which is the irreversible loss of species following a prolonged transient or delay. An error in interpretation of this <span class="hlt">model</span> led the authors to apply the results to all types of habitat destruction, but in fact the <span class="hlt">model</span> applies only to an across-the-board decrease in fecundity, not to disturbances. For repeated, spatially random disturbance, a different <span class="hlt">model</span> applies. For habitat destruction on regional scales (reduction in ecosystem area without disturbance in remnant areas), one must, in contrast, apply species-area relations based on the distribution of different habitat types (e.g., elevational and rainfall gradients, physiographic and edaphic variability). The error in interpretation of the basic <span class="hlt">model</span> is presented, followed by clarification of <span class="hlt">model</span> usage and development of a new <span class="hlt">model</span> that applies to disturbance events.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3999745','PMC'); return false;" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3999745"><span id="translatedtitle">Control theory for scanning probe microscopy <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p></p> <p>2014-01-01</p> <p>Summary We derive a theoretical <span class="hlt">model</span> for studying SPM feedback in the context of control theory. Previous <span class="hlt">models</span> presented in the literature that apply standard <span class="hlt">models</span> for proportional-integral-derivative controllers predict a highly unstable feedback environment. This <span class="hlt">model</span> uses features specific to the SPM implementation of the proportional-integral controller to give realistic feedback behaviour. As such the stability of SPM feedback for a wide range of feedback gains can be understood. Further consideration of mechanical responses of the SPM system gives insight into the causes of exciting mechanical resonances of the scanner during feedback operation. PMID:24778957</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/24778957','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/24778957"><span id="translatedtitle">Control theory for scanning probe microscopy <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Stirling, Julian</p> <p>2014-01-01</p> <p>We derive a theoretical <span class="hlt">model</span> for studying SPM feedback in the context of control theory. Previous <span class="hlt">models</span> presented in the literature that apply standard <span class="hlt">models</span> for proportional-integral-derivative controllers predict a highly unstable feedback environment. This <span class="hlt">model</span> uses features specific to the SPM implementation of the proportional-integral controller to give realistic feedback behaviour. As such the stability of SPM feedback for a wide range of feedback gains can be understood. Further consideration of mechanical responses of the SPM system gives insight into the causes of exciting mechanical resonances of the scanner during feedback operation. PMID:24778957</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ars.usda.gov/research/publications/Publications.htm?seq_no_115=264542','TEKTRAN'); return false;" href="http://www.ars.usda.gov/research/publications/Publications.htm?seq_no_115=264542"><span id="translatedtitle"><span class="hlt">Revisiting</span> the block method for evaluating thermal conductivities of clay and granite</span></a></p> <p><a target="_blank" href="http://www.ars.usda.gov/services/TekTran.htm">Technology Transfer Automated Retrieval System (TEKTRAN)</a></p> <p></p> <p></p> <p>Determination of thermal conductivities of porous media using the contact method is <span class="hlt">revisited</span> and revalidated with consideration of thermal contact resistance. Problems that limit the accuracy of determination of thermal conductivities of porous media are discussed. Thermal conductivities of granite...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011PhLA..375.1630B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011PhLA..375.1630B"><span id="translatedtitle">Quantization of the damped harmonic oscillator <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Baldiotti, M. C.; Fresneda, R.; Gitman, D. M.</p> <p>2011-04-01</p> <p>We return to the description of the damped harmonic oscillator with an assessment of previous works, in particular the Bateman-Caldirola-Kanai <span class="hlt">model</span> and a new <span class="hlt">model</span> proposed by one of the authors. We argue the latter has better high energy behavior and is connected to existing open-systems approaches.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/19697976','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/19697976"><span id="translatedtitle"><span class="hlt">Re-visiting</span> scholarly community engagement in the contemporary research assessment environments of Australasian universities.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Duke, Jan; Moss, Cheryle</p> <p>2009-01-01</p> <p>Restructuring of university environments to meet funding requirements based on research performance presents challenges internationally to nursing and other allied health groups. These funding <span class="hlt">models</span> generate more emphasis on the scholarship of discovery than on the scholarship of integration, the scholarship of application, and the scholarship of sharing knowledge. Yet achievement of health advances by these disciplines is unlikely to emerge through laboratory-based research. They are more likely to emerge through scholarly research activities which involve partnerships between universities and communities. Current emphases on research assessment and quantum measurements are particularly associated with the scholarship of discovery, and thus raise concerns that such pressures may lead universities and other organisations away from community engagement. In response to these issues, the importance of linking scholarship and communities, furthering mechanisms to legitimise scholarly community engagement, and reducing barriers to this in the context of the contemporary university research environments are argued. Boyer's <span class="hlt">model</span> of scholarship (that the work of universities centres around four areas of scholarship: discovery, integration, application and sharing knowledge) highlights these tensions. It is suggested that by <span class="hlt">revisiting</span> Boyer's <span class="hlt">model</span> and considering the ways in which it may generate possibilities for scholarly community engagement, university schools of nursing in the contemporary research assessment environment could find ways to balance the forms of scholarship by which social good can be advanced. PMID:19697976</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011EP%26S...63.1027I','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011EP%26S...63.1027I"><span id="translatedtitle">The origin of dust in galaxies <span class="hlt">revisited</span>: the mechanism determining dust content</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Inoue, A. K.</p> <p>2011-10-01</p> <p>The origin of cosmic dust is a fundamental issue in planetary science. This paper <span class="hlt">revisits</span> the origin of dust in galaxies, in particular, in the Milky Way, by using a chemical evolution <span class="hlt">model</span> of a galaxy composed of stars, interstellar medium, metals (elements heavier than helium), and dust. We start from a review of time-evolutionary equations of the four components, and then, we present simple recipes for the stellar remnant mass and yields of metal and dust based on <span class="hlt">models</span> of stellar nucleosynthesis and dust formation. After calibrating some <span class="hlt">model</span> parameters with the data from the solar neighborhood, we have confirmed a shortage of the stellar-dust-production rate relative to the dust-destruction rate by supernovae if the destruction efficiency suggested by theoretical works is correct. If the dust-mass growth by material accretion in molecular clouds is active, the observed dust amount in the solar neighborhood is reproduced. We present a clear analytic explanation of the mechanism for determining dust content in galaxies after the activation of accretion growth: a balance between accretion growth and supernova destruction. Thus, the dust content is independent of the uncertainty of the stellar dust yield after the growth activation. The timing of the activation is determined by a critical metal mass fraction which depends on the growth and destruction efficiencies. The solar system formation seems to have occurred well after the activation and plenty of dust would have existed in the proto-solar nebula.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016PhRvE..93b2705D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016PhRvE..93b2705D"><span id="translatedtitle">Positronium formation and annihilation in liquid crystalline smectic-E phase <span class="hlt">revisited</span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Dryzek, E.; Juszyńska-Gałazka, E.</p> <p>2016-02-01</p> <p>The results of the positron lifetime measurements of the quenched smectic-E (Sm-E ) phase of 4-butyl-4'-isothiocyano-1,1'-biphenyl (4TCB) are <span class="hlt">revisited</span>. The sites of positronium formation and annihilation, according to the <span class="hlt">model</span> with nanosegregated layered structure of the Sm-E phase and molten state of alkyl chains of molecules, are identified in the sublayer containing alkyl chains of molecules. The possibility of vitrification of the Sm-E phase for 4TCB consisting in freezing of the alkyl chain motions is considered as a cause of the thermally activated creation of sites where o -Ps is formed and annihilates in the quenched Sm-E phase. The description of the temperature dependence of ortho-positronium intensity is performed using the glass transition <span class="hlt">model</span> which assumes that the molecules occupy two thermodynamic states: solidlike or liquidlike regarding mobility of their alkyl chains. The equilibrium temperature between solidlike and liquidlike domains of the <span class="hlt">model</span> obtained from positron lifetime measurements coincides with the exothermic effect in the temperature dependence of the heat capacity.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26664232','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26664232"><span id="translatedtitle">Engineered nanoparticles: <span class="hlt">Revisiting</span> safety concerns in light of ethno medicine.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Palkhiwala, Suhani; Bakshi, Sonal R</p> <p>2014-01-01</p> <p>The nanoparticles are a miracle invention of the century that has opened novel avenues of applications in various fields. The safety aspect of exposure to nanoparticles for humans, plants, animals, soil micro-flora, and ecosystem at large has been questioned. The safety concern can be addressed by laboratory studies to assess the actual risk and recommend exposure limits and related regulation. There is also a suggestion for considering the nanoparticle form of conventional compounds as a new chemical and subject it to safety assessment in line with the chemical regulatory agencies. In the light of the current scenario of popularity and safety concerns regarding nanoparticles, the use of ancient metal based forms like, Bhasma is <span class="hlt">revisited</span> in the present article. The current approach of green synthesis of nanoparticles is compared with the Ayurveda Rasayana Shastra guidelines of Bhasma preparation and modern preparation of engineered nanoparticles. Since the benefits of nanotechnology are undeniable, and safety concerns are also not ungrounded, there is a pressing need to <span class="hlt">revisit</span> the ways nanoparticles are manufactured, and to carry out safety assessment by the techniques specially adapted for this novel compound. PMID:26664232</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ncbi.nlm.nih.gov/pubmed/26116427','PUBMED'); return false;" href="http://www.ncbi.nlm.nih.gov/pubmed/26116427"><span id="translatedtitle">Mathematical analysis of a multiple strain, multi-locus-allele system for antigenically variable infectious diseases <span class="hlt">revisited</span>.</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Cherif, Alhaji</p> <p>2015-09-01</p> <p>Many important pathogens such as HIV/AIDS, influenza, malaria, dengue and meningitis generally exist in phenotypically distinct serotypes that compete for hosts. <span class="hlt">Models</span> used to study these diseases appear as meta-population systems. Herein, we <span class="hlt">revisit</span> one of the multiple strain <span class="hlt">models</span> that have been used to investigate the dynamics of infectious diseases with co-circulating serotypes or strains, and provide analytical results underlying the numerical investigations. In particular, we establish the necessary conditions for the local asymptotic stability of the steady states and for the existence of oscillatory behaviors via Hopf bifurcation. In addition, we show that the existence of discrete antigenic forms among pathogens can either fully or partially self-organize, where (i) strains exhibit no strain structures and coexist or (ii) antigenic variants sort into non-overlapping or minimally overlapping clusters that either undergo the principle of competitive exclusion exhibiting discrete strain structures, or co-exist cyclically. 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