Science.gov

Sample records for higher derivative view

  1. Complex higher order derivative theories

    SciTech Connect

    Margalli, Carlos A.; Vergara, J. David

    2012-08-24

    In this work is considered a complex scalar field theory with higher order derivative terms and interactions. A procedure is developed to quantize consistently this system avoiding the presence of negative norm states. In order to achieve this goal the original real scalar high order field theory is extended to a complex space attaching a complex total derivative to the theory. Next, by imposing reality conditions the complex theory is mapped to a pair of interacting real scalar field theories without the presence of higher derivative terms.

  2. Anisotropic higher derivative gravity and inflationary universe

    SciTech Connect

    Kao, W. F.

    2006-08-15

    Stability analysis of the Kantowski-Sachs type universe in pure higher derivative gravity theory is studied in detail. The nonredundant generalized Friedmann equation of the system is derived by introducing a reduced one-dimensional generalized Kantowski-Sachs type action. Existence and stability of inflationary solution in the presence of higher derivative terms are also studied in detail. Implications to the choice of physical theories are discussed in detail in this paper.

  3. Higher Education's Cultural Obligations: Views and Reviews.

    ERIC Educational Resources Information Center

    Reid, John Y., Ed.

    Perspectives on the cultural obligations of higher education are presented in this collection of papers. Higher education's possible and probable cultural function is addressed from the perspective of business, the arts, education, and religion. Also discussed is the role of institutions of higher education in establishing a system of values,…

  4. Constraining higher derivative supergravity with scattering amplitudes

    DOE PAGES

    Wang, Yifan; Yin, Xi

    2015-08-31

    We study supersymmetry constraints on higher derivative deformations of type IIB supergravity by consideration of superamplitudes. Thus, combining constraints of on-shell supervertices and basic results from string perturbation theory, we give a simple argument for the non-renormalization theorem of Green and Sethi, and some of its generalizations.

  5. Gauge fixing in higher-derivative gravity

    NASA Astrophysics Data System (ADS)

    Bartoli, A.; Julve, J.; Sánchez, E. J.

    1999-07-01

    Linearized 4-derivative gravity with a general gauge-fixing term is considered. By a Legendre transform and a suitable diagonalization procedure it is cast into a second-order equivalent form where the nature of the physical degrees of freedom, the gauge ghosts, the Weyl ghosts and the intriguing `third ghosts', characteristic to higher-derivative theories, is made explicit. The symmetries of the theory and the structure of the compensating Faddeev-Popov ghost sector exhibit non-trivial peculiarities. The unitarity breaking negative-norm Weyl ghosts, already present in the diff-invariant theory, are out of the reach of the ghost cancellation BRST mechanism.

  6. Higher derivatives and renormalization in quantum cosmology

    NASA Astrophysics Data System (ADS)

    Mazzitelli, Francisco D.

    1992-04-01

    In the framework of the canonical quantization of general relativity, quantum field theory on a fixed background formally arises in an expansion in powers of the Planck length. In order to renormalize the theory, quadratic terms in the curvature must be included in the gravitational action from the beginning. These terms contain higher derivatives which change completely the Hamiltonian structure of the theory, not making clear the relation between the renormalized theory and the original one. We show that it is possible to avoid this problem. We replace the higher-derivative theory by a second-order one. The classical solutions of the latter are also solutions of the former. We quantize the theory, renormalize the infinities, and show that there is a smooth limit between the classical and the renormalized theories. We work in a Robertson-Walker minisuperspace with a quantum scalar field.

  7. Inconsistency of Minkowski higher-derivative theories

    NASA Astrophysics Data System (ADS)

    Aglietti, Ugo G.; Anselmi, Damiano

    2017-02-01

    We show that Minkowski higher-derivative quantum field theories are generically inconsistent, because they generate nonlocal, non-hermitian ultraviolet divergences, which cannot be removed by means of standard renormalization procedures. By "Minkowski theories" we mean theories that are defined directly in Minkowski spacetime. The problems occur when the propagators have complex poles, so that the correlation functions cannot be obtained as the analytic continuations of their Euclidean versions. The usual power counting rules fail and are replaced by much weaker ones. Self-energies generate complex divergences proportional to inverse powers of D'Alembertians. Three-point functions give more involved nonlocal divergences, which couple to infrared effects. We illustrate the violations of the locality and hermiticity of counterterms in scalar models and higher-derivative gravity.

  8. Eisenhart lift for higher derivative systems

    NASA Astrophysics Data System (ADS)

    Galajinsky, Anton; Masterov, Ivan

    2017-02-01

    The Eisenhart lift provides an elegant geometric description of a dynamical system of second order in terms of null geodesics of the Brinkmann-type metric. In this work, we attempt to generalize the Eisenhart method so as to encompass higher derivative models. The analysis relies upon Ostrogradsky's Hamiltonian. A consistent geometric description seems feasible only for a particular class of potentials. The scheme is exemplified by the Pais-Uhlenbeck oscillator.

  9. Canonical quantization of gravitation with higher derivatives

    SciTech Connect

    Dukhbinder, I.L.; Lyakhovich, S.L.

    1986-06-01

    The authors construct a Hamiltonian formulation, canonically quantize it, and find the local measure for a theory of gravitation with Langrangian. The approach is based on the general method of ''Hamiltonianization'' of theories with higher derivatives containing coupling, in a form specially suited for work with gauge theories. An expression is obtained for the generating functional for Green's functions in the form of a continuum over the metric, with a nontrivial measure different from that of Einsteinian gravitation.

  10. On butterfly effect in higher derivative gravities

    NASA Astrophysics Data System (ADS)

    Alishahiha, Mohsen; Davody, Ali; Naseh, Ali; Taghavi, Seyed Farid

    2016-11-01

    We study butterfly effect in D-dimensional gravitational theories containing terms quadratic in Ricci scalar and Ricci tensor. One observes that due to higher order derivatives in the corresponding equations of motion there are two butterfly velocities. The velocities are determined by the dimension of operators whose sources are provided by the metric. The three dimensional TMG model is also studied where we get two butterfly velocities at generic point of the moduli space of parameters. At critical point two velocities coincide.

  11. Simulation in Higher Education: A Sociomaterial View

    ERIC Educational Resources Information Center

    Hopwood, Nick; Rooney, Donna; Boud, David; Kelly, Michelle

    2016-01-01

    This article presents a sociomaterial account of simulation in higher education. Sociomaterial approaches change the ontological and epistemological bases for understanding learning and offer valuable tools for addressing important questions about relationships between university education and professional practices. Simulation has grown in many…

  12. Simulation in Higher Education: A Sociomaterial View

    ERIC Educational Resources Information Center

    Hopwood, Nick; Rooney, Donna; Boud, David; Kelly, Michelle

    2016-01-01

    This article presents a sociomaterial account of simulation in higher education. Sociomaterial approaches change the ontological and epistemological bases for understanding learning and offer valuable tools for addressing important questions about relationships between university education and professional practices. Simulation has grown in many…

  13. Nontrivial vacua in higher-derivative gravitation

    SciTech Connect

    Hindawi, A.; Ovrut, B.A.; Waldram, D.

    1996-05-01

    A discussion of an extended class of higher-derivative classical theories of gravity is presented. A procedure is given for exhibiting the new propagating degrees of freedom, at the full nonlinear level, by transforming the higher-derivative action to a canonical second-order form. For general fourth-order theories, described by actions which are general functions of the scalar curvature, the Ricci tensor and the full Riemann tensor, it is shown that the higher-derivative theories may have multiple stable vacua. The vacua are shown to be, in general, nontrivial, corresponding to de Sitter or anti{endash}de Sitter solutions of the original theory. It is also shown that around any vacuum the elementary excitations remain the massless graviton, a massive scalar field, and a massive ghostlike spin-two field. The analysis is extended to actions which are arbitrary functions of terms of the form {nabla}{sup 2{ital k}}{ital R}, and it is shown that such theories also have a nontrivial vacuum structure. {copyright} {ital 1996 The American Physical Society.}

  14. Healthy degenerate theories with higher derivatives

    SciTech Connect

    Motohashi, Hayato; Noui, Karim; Suyama, Teruaki; Yamaguchi, Masahide; Langlois, David

    2016-07-20

    In the context of classical mechanics, we study the conditions under which higher-order derivative theories can evade the so-called Ostrogradsky instability. More precisely, we consider general Lagrangians with second order time derivatives, of the form L(ϕ{sup ¨a}, ϕ-dot {sup a},ϕ{sup a}; q-dot {sup i},q{sup i}) with a=1,⋯,n and i=1,⋯,m. For n=1, assuming that the q{sup i}’s form a nondegenerate subsystem, we confirm that the degeneracy of the kinetic matrix eliminates the Ostrogradsky instability. The degeneracy implies, in the Hamiltonian formulation of the theory, the existence of a primary constraint, which generates a secondary constraint, thus eliminating the Ostrogradsky ghost. For n>1, we show that, in addition to the degeneracy of the kinetic matrix, one needs to impose extra conditions to ensure the presence of a sufficient number of secondary constraints that can eliminate all the Ostrogradsky ghosts. When these conditions that ensure the disappearance of the Ostrogradsky instability are satisfied, we show that the Euler-Lagrange equations, which involve a priori higher order derivatives, can be reduced to a second order system.

  15. Healthy degenerate theories with higher derivatives

    NASA Astrophysics Data System (ADS)

    Motohashi, Hayato; Noui, Karim; Suyama, Teruaki; Yamaguchi, Masahide; Langlois, David

    2016-07-01

    In the context of classical mechanics, we study the conditions under which higher-order derivative theories can evade the so-called Ostrogradsky instability. More precisely, we consider general Lagrangians with second order time derivatives, of the form L(̈phia, dot phia, phia; qi, qi) with a = 1,⋯,n and i = 1,⋯,m. For n = 1, assuming that the qi's form a nondegenerate subsystem, we confirm that the degeneracy of the kinetic matrix eliminates the Ostrogradsky instability. The degeneracy implies, in the Hamiltonian formulation of the theory, the existence of a primary constraint, which generates a secondary constraint, thus eliminating the Ostrogradsky ghost. For n > 1, we show that, in addition to the degeneracy of the kinetic matrix, one needs to impose extra conditions to ensure the presence of a sufficient number of secondary constraints that can eliminate all the Ostrogradsky ghosts. When these conditions that ensure the disappearance of the Ostrogradsky instability are satisfied, we show that the Euler-Lagrange equations, which involve a priori higher order derivatives, can be reduced to a second order system.

  16. Superspace higher derivative terms in two dimensions

    NASA Astrophysics Data System (ADS)

    Farakos, Fotis; Kočí, Pavel; von Unge, Rikard

    2017-04-01

    We study (2, 2) and (4, 4) supersymmetric theories with superspace higher derivatives in two dimensions. A characteristic feature of these models is that they have several different vacua, some of which break supersymmetry. Depending on the vacuum, the equations of motion describe different propagating degrees of freedom. Various examples are presented which illustrate their generic properties. As a by-product we see that these new vacua give a dynamical way of generating non-linear realizations. In particular, our 2D (4, 4) example is the dimensional reduction of a 4D N = 2 model, and gives a new way for the spontaneous breaking of extended supersymmetry.

  17. DC conductivity and higher derivative gravity

    NASA Astrophysics Data System (ADS)

    Donos, Aristomenis; Gauntlett, Jerome P.; Griffin, Tom; Melgar, Luis

    2017-07-01

    For Gauss-Bonnet gravity and in the context of holography we show how the thermal DC conductivity can be obtained by solving a generalised system of Stokes equations for an auxiliary fluid on a curved black hole horizon. For more general higher derivative theories of gravity coupled to gauge-fields, we also analyse the linearised thermal and electric currents that are produced by DC thermal and electric sources. We show how suitably defined DC transport current fluxes of the dual field theory are given by current fluxes defined at the black horizon. Dedicated to the 75th birthday of John H Schwarz

  18. Black holes in higher derivative gravity.

    PubMed

    Lü, H; Perkins, A; Pope, C N; Stelle, K S

    2015-05-01

    Extensions of Einstein gravity with higher-order derivative terms arise in string theory and other effective theories, as well as being of interest in their own right. In this Letter we study static black-hole solutions in the example of Einstein gravity with additional quadratic curvature terms. A Lichnerowicz-type theorem simplifies the analysis by establishing that they must have vanishing Ricci scalar curvature. By numerical methods we then demonstrate the existence of further black-hole solutions over and above the Schwarzschild solution. We discuss some of their thermodynamic properties, and show that they obey the first law of thermodynamics.

  19. Warped Phenomenology of Higher-Derivative Gravity

    SciTech Connect

    Rizzo, T.

    2004-12-06

    We examine the phenomenological implications at colliders for the existence of higher-derivative gravity terms as extensions to the Randall-Sundrum model. Such terms are expected to arise on rather general grounds, e.g., from string theory. In 5-d, if we demand that the theory be unitary and ghost free, these new contributions to the bulk action are uniquely of the Gauss-Bonnet form. We demonstrate that the usual expectations for the production cross section and detailed properties of graviton Kaluza-Klein resonances and TeV-scale black holes can be substantially altered by existence of these additional contributions. It is shown that measurements at future colliders will be highly sensitive to the presence of such terms.

  20. Higher derivative corrections in holographic QCD

    SciTech Connect

    Basu, Anirban

    2007-12-15

    We consider the effect of the R{sup 4} term in type IIA string theory on the supergravity background dual to N{sub c} D4-branes compactified on a circle with supersymmetry breaking boundary conditions. We study the dynamics of D8-branes in this perturbed geometry in the probe approximation. This leads to an analysis of higher derivative corrections in holographic QCD beyond the supergravity approximation. We make a rough estimate of the corrections to the masses of some of the lightest (axial) vector mesons. The corrections are suppressed by a factor of (g{sub YM}{sup 2}N{sub c}){sup -3} compared to their supergravity values. We find that the masses of these mesons increase from their supergravity values.

  1. Boson stars in higher-derivative gravity

    NASA Astrophysics Data System (ADS)

    Baibhav, Vishal; Maity, Debaprasad

    2017-01-01

    In this paper, we have constructed boson star (BS) solutions in four-dimensional scalar-Gauss-Bonnet (sGB) theory. In order to have a nontrivial effect from the Gauss-Bonnet term, we invoked nonminimal coupling between a complex scalar field and the Gauss-Bonnet term with a coupling parameter, α . We show that the scalar field can no longer take arbitrary value at the center of the star. Furthermore, boson stars in our higher-derivative theory turn out to be slightly massive but much more compact than those in the usual Einstein's gravity. Interestingly, we found that for α <-0.4 and α >0.8 , binding energy for all possible boson stars is always negative. This implies that these stars are intrinsically stable against the decay by dispersion. However, for -0.4 <α <0.8 , boson stars can have both positive and negative binding energy depending on scalar field value at the center of the star. We also present the mass-radius and mass-frequency curves for boson stars and compare them with other compact objects in gravity models derived from the Gauss-Bonnet term.

  2. Cosmological perturbations in non-local higher-derivative gravity

    SciTech Connect

    Craps, Ben; Jonckheere, Tim De; Koshelev, Alexey S. E-mail: Tim.De.Jonckheere@vub.ac.be

    2014-11-01

    We study cosmological perturbations in a non-local higher-derivative model of gravity introduced by Biswas, Mazumdar and Siegel. We extend previous work, which had focused on classical scalar perturbations around a cosine hyperbolic bounce solution, in three ways. First, we point out the existence of a Starobinsky solution in this model, which is more attractive from a phenomenological point of view (even though it has no bounce). Second, we study classical vector and tensor pertuxsxrbations. Third, we show how to quantize scalar and tensor perturbations in a de Sitter phase (for choices of parameters such that the model is ghost-free). Our results show that the model is well-behaved at this level, and are very similar to corresponding results in local f(R) models. In particular, for the Starobinsky solution of non-local higher-derivative gravity, we find the same tensor-to-scalar ratio as for the conventional Starobinsky model.

  3. Generalized entropy and higher derivative gravity

    NASA Astrophysics Data System (ADS)

    Camps, Joan

    2014-03-01

    We derive an extension of the Ryu-Takayanagi prescription for curvature squared theories of gravity in the bulk, and comment on a prescription for more general theories. This results in a new entangling functional, that contains a correction to Wald's entropy. The new term is quadratic in the extrinsic curvature. The coefficient of this correction is a second derivative of the lagrangian with respect to the Riemann tensor. For Gauss-Bonnet gravity, the new functional reduces to Jacobson-Myers'.

  4. Canonical bifurcation in higher derivative, higher spin, theories

    NASA Astrophysics Data System (ADS)

    Deser, S.; Ertl, S.; Grumiller, D.

    2013-05-01

    We present a non-perturbative canonical analysis of the D = 3 quadratic-curvature, yet ghost-free, model to exemplify a novel, ‘constraint bifurcation’, effect. Consequences include a jump in excitation count: a linearized level gauge variable is promoted to a dynamical one in the full theory. We illustrate these results with their concrete perturbative counterparts. They are of course mutually consistent, as are perturbative findings in related models. A geometrical interpretation in terms of propagating torsion reveals the model’s relation to an (improved) version of Einstein-Weyl gravity at the linearized level. Finally, we list some necessary conditions for triggering the bifurcation phenomenon in general interacting gauge systems. This article is part of a special issue of Journal of Physics A: Mathematical and Theoretical devoted to ‘Higher spin theories and holography’.

  5. Getting into Higher Education: Young People's Views of Fairness

    ERIC Educational Resources Information Center

    Minty, Sarah

    2016-01-01

    Free tuition in Scotland is frequently linked to principles of equal access and fairness. But just how "fair" do young people think access to higher education is? And what concepts of fairness are their views based on? This article reports the findings of semi-structured interviews with 121 young people aged 15-18 in Scotland. The paper…

  6. Student Views of Effective Online Teaching in Higher Education

    ERIC Educational Resources Information Center

    Young, Suzanne

    2006-01-01

    This study investigated student views of online instruction in higher education courses. Data were collected from 199 online students using a Web-based instrument. The instrument consisted of items that were expected to be associated with effective online teaching. One overall effective teaching item was regressed onto twenty-five items in order…

  7. Getting into Higher Education: Young People's Views of Fairness

    ERIC Educational Resources Information Center

    Minty, Sarah

    2016-01-01

    Free tuition in Scotland is frequently linked to principles of equal access and fairness. But just how "fair" do young people think access to higher education is? And what concepts of fairness are their views based on? This article reports the findings of semi-structured interviews with 121 young people aged 15-18 in Scotland. The paper…

  8. Studies in higher-derivative gravitation

    SciTech Connect

    Dutt, S.K.

    1987-01-01

    In this work two formulations of gravitation in which the action includes the second-derivatives of the metric in a non-trivial fashion are investigated. In the first part, the gauge theory of gravitation proposed by Yang in 1974 is investigated. The implications of coupling the pure space equations to matter sources via the action principle proposed by Yang is studied. It is shown that this action principle does not couple to matter sources in a satisfactory fashion. An earlier study by Fairchild along similar lines is critically examined. It is argued that Fairchild's action functional, and his objections to Yang's gauge approach to gravitation, arise from a not very meaningful analogy with the case of a general gauge field. Also, a conjecture originated in that work is refuted. A modification of Yang's action functional is provided which leads to both the Einstein and Yang field-equations. This system is shown to have non-trivial solutions in the presence of matter. An additional advantage is that the unphysical solutions of the pure space equations can be ruled out. It is shown that the joint system of Einstein and Yang field-equations leads to a physically viable cosmological model based on the Robertson-Walker metric, which satisfies both sets of field-equations. In the second part of this work, the Hamiltonian for pure gravity in Einstein's theory is obtained directly from the Hilbert Lagrangian. Since the Lagrangian depends upon the second-derivatives of the metric tensor, first the Hamiltonian formulation for a Lagrangian which may, in general depend upon the Nth-order time derivatives of the dynamical variables is developed.

  9. Chaotic inflation in higher derivative gravity theories

    NASA Astrophysics Data System (ADS)

    Myrzakul, Shynaray; Myrzakulov, Ratbay; Sebastiani, Lorenzo

    2015-03-01

    In this paper, we investigate chaotic inflation from a scalar field subjected to a potential in the framework of -gravity, where we add a correction to Einstein's gravity based on a function of the square of the Ricci scalar , the contraction of the Ricci tensor , and the contraction of the Riemann tensor . The Gauss-Bonnet case is also discussed. We give the general formalism of inflation, deriving the slow-roll parameters, the -fold number, and the spectral indices. Several explicit examples are furnished; namely, we will consider the cases of a massive scalar field and a scalar field with quartic potential and some power-law function of the curvature invariants under investigation in the gravitational action of the theory. A viable approach to inflation according with observations is analyzed.

  10. Beyond velocity and acceleration: jerk, snap and higher derivatives

    NASA Astrophysics Data System (ADS)

    Eager, David; Pendrill, Ann-Marie; Reistad, Nina

    2016-11-01

    The higher derivatives of motion are rarely discussed in the teaching of classical mechanics of rigid bodies; nevertheless, we experience the effect not only of acceleration, but also of jerk and snap. In this paper we will discuss the third and higher order derivatives of displacement with respect to time, using the trampolines and theme park roller coasters to illustrate this concept. We will also discuss the effects on the human body of different types of acceleration, jerk, snap and higher derivatives, and how they can be used in physics education to further enhance the learning and thus the understanding of classical mechanics concepts.

  11. Higher derivative theories with constraints: exorcising Ostrogradski's ghost

    SciTech Connect

    Chen, Tai-jun; Lim, Eugene A.; Fasiello, Matteo; Tolley, Andrew J. E-mail: matte@case.edu E-mail: andrew.j.tolley@case.edu

    2013-02-01

    We prove that the linear instability in a non-degenerate higher derivative theory, the Ostrogradski instability, can only be removed by the addition of constraints if the original theory's phase space is reduced.

  12. Finite BRST Mapping in Higher-Derivative Models

    NASA Astrophysics Data System (ADS)

    Moshin, Pavel Yu.; Upadhyay, Sudhaker; Castro, Ricardo A.

    2017-08-01

    We continue the study of finite field-dependent BRST (FFBRST) symmetry in the quantum theory of gauge fields. An expression for the Jacobian of path integral measure is presented, depending on a finite field-dependent parameter, and the FFBRST symmetry is then applied to a number of well-established quantum gauge theories in a form which incudes higher-derivative terms. Specifically, we examine the corresponding versions of the Maxwell theory, non-Abelian vector field theory, and gravitation theory. We present a systematic mapping between different forms of gauge-fixing, including those with higher-derivative terms, for which these theories have better renormalization properties. In doing so, we also provide the independence of the S-matrix from a particular gauge-fixing with higher derivatives. Following this method, a higher-derivative quantum action can be constructed for any gauge theory in the FFBRST framework.

  13. Automatic evaluation of first- and higher-derivative vectors

    SciTech Connect

    Griewank, A.

    1990-01-01

    The numerical analysis of parameter-dependent nonlinear systems almost always involves first-derivative matrices and often also requires the evaluation of higher derivatives along certain singular directions. It is shown here how these selected derivative values can be obtained without differencing and at a reasonable cost under the realistic assumption that the nonlinear system is given in the form of a computer program for its evaluation. 14 refs.

  14. Higher derivative couplings in theories with sixteen supersymmetries

    SciTech Connect

    Lin, Ying -Hsuan; Shao, Shu -Heng; Yin, Xi; Wang, Yifan

    2015-12-15

    We give simple arguments for new non-renormalization theorems on higher derivative couplings of gauge theories to supergravity, with sixteen supersymmetries, by considerations of brane-bulk superamplitudes. This leads to some exact results on the effective coupling of D3-branes in type IIB string theory. As a result, we also derive exact results on higher dimensional operators in the torus compactification of the six dimensional (0, 2) superconformal theory.

  15. Orthographic terrain views using data derived from digital elevation models

    NASA Technical Reports Server (NTRS)

    Dubayah, R. O.; Dozier, J.

    1986-01-01

    A fast algorithm for producing three-dimensional orthographic terrain views uses digital elevation data and co-registered imagery. These views are created using projective geometry and are designed for display on high-resolution raster graphics devices. The algorithm's effectiveness is achieved by (1) the implementation of two efficient gray-level interpolation routines that offer the user a choice between speed and smoothness, and (2) a unique visible surface determination procedure based on horizon angles derived from the elevation data set.

  16. Generalised boundary terms for higher derivative theories of gravity

    NASA Astrophysics Data System (ADS)

    Teimouri, Ali; Talaganis, Spyridon; Edholm, James; Mazumdar, Anupam

    2016-08-01

    In this paper we wish to find the corresponding Gibbons-Hawking-York term for the most general quadratic in curvature gravity by using Coframe slicing within the Arnowitt-Deser-Misner (ADM) decomposition of spacetime in four dimensions. In order to make sure that the higher derivative gravity is ghost and tachyon free at a perturbative level, one requires infinite covariant derivatives, which yields a generalised covariant infinite derivative theory of gravity. We will be exploring the boundary term for such a covariant infinite derivative theory of gravity.

  17. Higher Education Classroom Management: Kuwait University Students' Views

    ERIC Educational Resources Information Center

    Al-Hamdan, Jasem

    2007-01-01

    This study attempts to examine students' views on the effectiveness of classroom management techniques used by faculty members. By examining their views, some insights may be gained as to the kinds of management techniques that a faculty member might adopt in order to promote better teaching and learning environment. Effective classroom management…

  18. Higher Education Classroom Management: Kuwait University Students' Views

    ERIC Educational Resources Information Center

    Al-Hamdan, Jasem

    2007-01-01

    This study attempts to examine students' views on the effectiveness of classroom management techniques used by faculty members. By examining their views, some insights may be gained as to the kinds of management techniques that a faculty member might adopt in order to promote better teaching and learning environment. Effective classroom management…

  19. Second order higher-derivative corrections in Double Field Theory

    NASA Astrophysics Data System (ADS)

    Lescano, Eric; Marqués, Diego

    2017-06-01

    HSZ Double Field Theory is a higher-derivative theory of gravity with exact and manifest T-duality symmetry. The first order corrections in the massless sector were shown to be governed solely by Chern-Simons deformations of the three-form field strength. We compute the full action with up to six derivatives O({α}^' 2}) for the universal sector containing the metric, two-form and dilaton fields. The Green-Schwarz transformation of the two-form field remains uncorrected to second order. In addition to the expected Chern-Simons-squared and Riemann-cubed terms the theory contains a cubic Gauss-Bonnet interaction, plus other six-derivative unambiguous terms involving the three-form field strength whose presence indicates that the theory must contain further higher-derivative corrections.

  20. Higher derivative gravity: Field equation as the equation of state

    NASA Astrophysics Data System (ADS)

    Dey, Ramit; Liberati, Stefano; Mohd, Arif

    2016-08-01

    One of the striking features of general relativity is that the Einstein equation is implied by the Clausius relation imposed on a small patch of locally constructed causal horizon. The extension of this thermodynamic derivation of the field equation to more general theories of gravity has been attempted many times in the last two decades. In particular, equations of motion for minimally coupled higher-curvature theories of gravity, but without the derivatives of curvature, have previously been derived using a thermodynamic reasoning. In that derivation the horizon slices were endowed with an entropy density whose form resembles that of the Noether charge for diffeomorphisms, and was dubbed the Noetheresque entropy. In this paper, we propose a new entropy density, closely related to the Noetheresque form, such that the field equation of any diffeomorphism-invariant metric theory of gravity can be derived by imposing the Clausius relation on a small patch of local causal horizon.

  1. On the gravitational seesaw in higher-derivative gravity

    NASA Astrophysics Data System (ADS)

    Accioly, Antonio; Giacchini, Breno L.; Shapiro, Ilya L.

    2017-08-01

    Local gravitational theories with more than four derivatives are superrenormalizable. They also may be unitary in the Lee-Wick sense. Thus it is relevant to study the low-energy properties of these theories, especially to identify observables which might be useful for experimental detection of higher derivatives. Using an analogy with the neutrino physics, we explore the possibility of a gravitational seesaw mechanism in which several dimensional parameters of the same order of magnitude produce a hierarchy in the masses of propagating particles. Such a mechanism could make a relatively light degree of freedom detectable in low-energy laboratory and astrophysical observations, such as torsion-balance experiments and the bending of light. We demonstrate that such a seesaw mechanism in the six- and more-derivative theories is unable to reduce the lightest mass more than in the simplest four-derivative model. Adding more derivatives to the four-derivative action of gravity makes heavier masses even greater, while the lightest massive ghost is not strongly affected. This fact is favorable for protecting the theory from instabilities but makes the experimental detection of higher derivatives more difficult.

  2. Stabilization of linear higher derivative gravity with constraints

    SciTech Connect

    Chen, Tai-jun; Lim, Eugene A. E-mail: eugene.a.lim@gmail.com

    2014-05-01

    We show that the instabilities of higher derivative gravity models with quadratic curvature invariant αR{sup 2}+βR{sub μν}R{sup μν} can be removed by judicious addition of constraints at the quadratic level of metric fluctuations around Minkowski/de Sitter background. With a suitable parameter choice, we find that the instabilities of helicity-0, 1, 2 modes can be removed while reducing the dimensionality of the original phase space. To retain the renormalization properties of higher derivative gravity, Lorentz symmetry in the constrained theory is explicitly broken.

  3. Stabilization of linear higher derivative gravity with constraints

    NASA Astrophysics Data System (ADS)

    Chen, Tai-jun; Lim, Eugene A.

    2014-05-01

    We show that the instabilities of higher derivative gravity models with quadratic curvature invariant αR2+βRμνRμν can be removed by judicious addition of constraints at the quadratic level of metric fluctuations around Minkowski/de Sitter background. With a suitable parameter choice, we find that the instabilities of helicity-0, 1, 2 modes can be removed while reducing the dimensionality of the original phase space. To retain the renormalization properties of higher derivative gravity, Lorentz symmetry in the constrained theory is explicitly broken.

  4. Integration into higher education: key implementers' views on why nurse education moved into higher education.

    PubMed

    Burke, Linda M

    2003-05-01

    The aim of this paper is to discuss the opinions of the key individuals involved in implementing the integration of nurse education into higher education in the United Kingdom (UK) about why nurse education moved into higher education and why this happened when it did. In 1995 the last of the old-style schools of nursing in the UK was fully integrated into higher education and were detached financially, legally and organizationally from District Health Authorities. However, only 6 years before, when Working Paper 10 was produced, there were only a few nursing degree courses located within higher education. What made this move into higher education particularly noteworthy was that there was never a clear statement of intent from the government that this integration of health care education was intended. Despite the fact that this is one of the most significant changes ever to take place in nurse education, there has been relatively little empirical research about why the development occurred. A qualitative approach was selected for this study and the methods used were policy analysis and interviews. A purposeful sample of 70 implementers involved in the integration process was selected and asked for their views on this issue. Participants believed that integration had occurred because of a combination of complex factors, but there was a division between those who thought that it was centrally planned and others who felt that it was an accidental outcome of the particular events of the time. It is not clear whether policy was influencing action or action influencing policy. Understanding of why this change occurred is needed if health care professionals wish to have greater control over future changes in education.

  5. Derivation of Sky-View Factors from LIDAR Data

    NASA Technical Reports Server (NTRS)

    Kidd, Christopher; Chapman, Lee

    2013-01-01

    The use of Lidar (Light Detection and Ranging), an active light-emitting instrument, is becoming increasingly common for a range of potential applications. Its ability to provide fine resolution spatial and vertical resolution elevation data makes it ideal for a wide range of studies. This paper demonstrates the capability of Lidar data to measure sky view factors (SVF). The Lidar data is used to generate a spatial map of SVFs which are then compared against photographically-derived SVF at selected point locations. At each location three near-surface elevations measurements were taken and compared with collocated Lidar-derived estimated. It was found that there was generally good agreement between the two methodologies, although with decreasing SVF the Lidar-derived technique tended to overestimate the SVF: this can be attributed in part to the spatial resolution of the Lidar sampling. Nevertheless, airborne Lidar systems can map sky view factors over a large area easily, improving the utility of such data in atmospheric and meteorological models.

  6. Tackling higher derivative ghosts with the Euclidean path integral

    SciTech Connect

    Fontanini, Michele; Trodden, Mark

    2011-05-15

    An alternative to the effective field theory approach to treat ghosts in higher derivative theories is to attempt to integrate them out via the Euclidean path integral formalism. It has been suggested that this method could provide a consistent framework within which we might tolerate the ghost degrees of freedom that plague, among other theories, the higher derivative gravity models that have been proposed to explain cosmic acceleration. We consider the extension of this idea to treating a class of terms with order six derivatives, and find that for a general term the Euclidean path integral approach works in the most trivial background, Minkowski. Moreover we see that even in de Sitter background, despite some difficulties, it is possible to define a probability distribution for tensorial perturbations of the metric.

  7. Higher derivative corrections, dimensional reduction and Ehlers duality

    NASA Astrophysics Data System (ADS)

    Michel, Yann; Pioline, Boris

    2007-09-01

    Motivated by applications to black hole physics and duality, we study the effect of higher derivative corrections on the dimensional reduction of four-dimensional Einstein, Einstein-Liouville and Einstein-Maxwell gravity to one direction, as appropriate for stationary, spherically symmetric solutions. We construct a field redefinition scheme such that the one-dimensional Lagrangian is corrected only by powers of first derivatives of the fields, eliminating spurious modes and providing a suitable starting point for quantization. We show that the Ehlers symmetry, broken by the leading R2 corrections in Einstein-Liouville gravity, can be restored by including contributions of Taub-NUT instantons. Finally, we give a preliminary discussion of the duality between higher-derivative F-term corrections on the vector and hypermultiplet branches in N = 2 supergravity in four dimensions.

  8. Higher derivative field theories: degeneracy conditions and classes

    NASA Astrophysics Data System (ADS)

    Crisostomi, Marco; Klein, Remko; Roest, Diederik

    2017-06-01

    We provide a full analysis of ghost free higher derivative field theories with coupled degrees of freedom. Assuming the absence of gauge symmetries, we derive the degeneracy conditions in order to evade the Ostrogradsky ghosts, and analyze which (non)trivial classes of solutions this allows for. It is shown explicitly how Lorentz invariance avoids the propagation of "half" degrees of freedom. Moreover, for a large class of theories, we construct the field redefinitions and/or (extended) contact transformations that put the theory in a manifestly first order form. Finally, we identify which class of theories cannot be brought to first order form by such transformations.

  9. A new theorem on higher order derivatives of Lyapunov functions.

    PubMed

    Meigoli, Vahid; Nikravesh, Seyyed Kamaleddin Yadavar

    2009-04-01

    The Lyapunov stability analysis method for nonlinear dynamic systems requires a non positive first derivative of the Lyapunov functions along the system's trajectories. In this paper, a new method is developed to relax this requirement. A new sufficient condition is developed for the stability analysis of nonlinear systems, introducing some inequalities for higher order derivatives of the Lyapunov function. The differential inequalities can be considered as a new controllable canonical form linear time invariant system with negative inputs. The stability analysis of a given nonlinear system is then reduced to check if the characteristic equation for the new linear time invariant system is Hurwitz. Some examples are presented to establish the approach.

  10. Holographic metal-insulator transition in higher derivative gravity

    NASA Astrophysics Data System (ADS)

    Ling, Yi; Liu, Peng; Wu, Jian-Pin; Zhou, Zhenhua

    2017-03-01

    We introduce a Weyl term into the Einstein-Maxwell-Axion theory in four dimensional spacetime. Up to the first order of the Weyl coupling parameter γ, we construct charged black brane solutions without translational invariance in a perturbative manner. Among all the holographic frameworks involving higher derivative gravity, we are the first to obtain metal-insulator transitions (MIT) when varying the system parameters at zero temperature. Furthermore, we study the holographic entanglement entropy (HEE) of strip geometry in this model and find that the second order derivative of HEE with respect to the axion parameter exhibits maximization behavior near quantum critical points (QCPs) of MIT. It testifies the conjecture in [1,2] that HEE itself or its derivatives can be used to diagnose quantum phase transition (QPT).

  11. Degenerate higher derivative theories beyond Horndeski: evading the Ostrogradski instability

    SciTech Connect

    Langlois, David; Noui, Karim E-mail: karim.noui@lmpt.univ-tours.fr

    2016-02-01

    Theories with higher order time derivatives generically suffer from ghost-like instabilities, known as Ostrogradski instabilities. This fate can be avoided by considering ''degenerate'' Lagrangians, whose kinetic matrix cannot be inverted, thus leading to constraints between canonical variables and a reduced number of physical degrees of freedom. In this work, we derive in a systematic way the degeneracy conditions for scalar-tensor theories that depend quadratically on second order derivatives of a scalar field. We thus obtain a classification of all degenerate theories within this class of scalar-tensor theories. The quartic Horndeski Lagrangian and its extension beyond Horndeski belong to these degenerate cases. We also identify new families of scalar-tensor theories with the property that they are degenerate despite the nondegeneracy of the purely scalar part of their Lagrangian.

  12. Stable static structures in models with higher-order derivatives

    SciTech Connect

    Bazeia, D.; Lobão, A.S.; Menezes, R.

    2015-09-15

    We investigate the presence of static solutions in generalized models described by a real scalar field in four-dimensional space–time. We study models in which the scalar field engenders higher-order derivatives and spontaneous symmetry breaking, inducing the presence of domain walls. Despite the presence of higher-order derivatives, the models keep to equations of motion second-order differential equations, so we focus on the presence of first-order equations that help us to obtain analytical solutions and investigate linear stability on general grounds. We then illustrate the general results with some specific examples, showing that the domain wall may become compact and that the zero mode may split. Moreover, if the model is further generalized to include k-field behavior, it may contribute to split the static structure itself.

  13. Holographic entanglement entropy for general higher derivative gravity

    NASA Astrophysics Data System (ADS)

    Dong, Xi

    2014-01-01

    We propose a general formula for calculating the entanglement entropy in theories dual to higher derivative gravity where the Lagrangian is a contraction of Riemann tensors. Our formula consists of Wald's formula for the black hole entropy, as well as corrections involving the extrinsic curvature. We derive these corrections by noting that they arise from naively higher order contributions to the action which are enhanced due to would-be logarithmic divergences. Our formula reproduces the Jacobson-Myers entropy in the context of Lovelock gravity, and agrees with existing results for general four-derivative gravity. We emphasize that the formula should be evaluated on a particular bulk surface whose location can in principle be determined by solving the equations of motion with conical boundary conditions. This may be difficult in practice, and an alternative method is desirable. A natural prescription is simply minimizing our formula, analogous to the Ryu-Takayanagi prescription for Einstein gravity. We show that this is correct in several examples including Lovelock and general four-derivative gravity.

  14. Lorentz-breaking theory with higher derivatives in spinor sector

    NASA Astrophysics Data System (ADS)

    Nascimento, J. R.; Petrov, A. Yu.; Reyes, C. Marat

    2015-08-01

    We consider the two-point function of the gauge field in Lorentz-breaking theories with higher-derivative extension of the Dirac Lagrangian. We show that the Carroll-Field-Jackiw term naturally arises in this theory as a quantum correction being perfectly finite and thus displaying no ambiguities. Also, the finiteness of this term at the low energy limit and the absence of large Lorentz violating corrections allows to avoid the fine-tuning problem.

  15. Stability in higher-derivative matter fields theories

    NASA Astrophysics Data System (ADS)

    Tretyakov, Petr V.

    2016-09-01

    We discuss possible instabilities in higher-derivative matter field theories. These theories have two free parameters β _1 and β _4. By using a dynamical system approach we explicitly demonstrate that for the stability of Minkowski space in an expanding universe we need the condition β _4<0. By using the quantum field theory approach we also find an additional restriction for the parameters, β _1>-1/3β _4, which is needed to avoid a tachyon-like instability.

  16. Resources for Higher Education: An Economist's View. (Reprint).

    ERIC Educational Resources Information Center

    Schultz, Theodore W.

    1969-01-01

    The limitations of economic analysis are evident when one considers the complexity of our society's needs and problems. Seven propositions which may be useful in planning and in financing higher education are: education is a form of human capital; the 3 major functions of higher education are discovering talent, instruction and research; there are…

  17. Higher derivative massive spin-3 models in D =2 +1

    NASA Astrophysics Data System (ADS)

    Dalmazi, D.; Mendonça, E. L.

    2016-07-01

    We find new higher derivative models describing a parity doublet of massive spin-3 modes in D =2 +1 dimensions. One of them is of fourth order in derivatives while the other one is of sixth order. They are complete, in the sense that they contain the auxiliary scalar field required to remove spurious degrees of freedom. Both of them are obtained through the master action technique starting with the usual (second-order) spin-3 Singh-Hagen model, which guarantees that they are ghost free. The fourth- and sixth-order terms are both invariant under (transverse) Weyl transformations, quite similarly to the fourth-order K -term of the "new massive gravity." The sixth-order term slightly differs from the product of the Schouten by the Einstein tensor, both of third order in derivatives. It is also possible to write down the fourth-order term as a product of a Schouten-like by an Einstein-like tensor (both of second order in derivatives) in close analogy with the K -term.

  18. Boundary terms, variational principles, and higher derivative modified gravity

    SciTech Connect

    Dyer, Ethan; Hinterbichler, Kurt

    2009-01-15

    We discuss the criteria that must be satisfied by a well-posed variational principle. We clarify the role of Gibbons-Hawking-York type boundary terms in the actions of higher derivative models of gravity, such as F(R) gravity, and argue that the correct boundary terms are the naive ones obtained through the correspondence with scalar-tensor theory, despite the fact that variations of normal derivatives of the metric must be fixed on the boundary. We show in the case of F(R) gravity that these boundary terms reproduce the correct Arnowitt-Deser-Misner energy in the Hamiltonian formalism, and the correct entropy for black holes in the semiclassical approximation.

  19. α' Inflation: moduli stabilisation and observable tensors from higher derivatives

    NASA Astrophysics Data System (ADS)

    Cicoli, Michele; Ciupke, David; de Alwis, Senarath; Muia, Francesco

    2016-09-01

    The leading order dynamics of the type IIB Large Volume Scenario is characterised by the interplay between α' and non-perturbative effects which fix the overall volume and all local blow-up modes leaving (in general) several flat directions. In this paper we show that, in an arbitrary Calabi-Yau with at least one blow-up mode resolving a point-like singularity, any remaining flat directions can be lifted at subleading order by the inclusions of higher derivative α' corrections. We then focus on simple fibred cases with one remaining flat direction which can behave as an inflaton if its potential is generated by both higher derivative α' and winding loop corrections. Natural values of the underlying parameters give a spectral index in agreement with observational data and a tensor-to-scalar ratio of order r = 0 .01 which could be observed by forthcoming CMB experiments. Dangerous corrections from higher dimensional operators are suppressed due to the presence of an approximate non-compact shift symmetry.

  20. Higher Education, Race & Diversity: Views from the Field.

    ERIC Educational Resources Information Center

    Humphreys, Debra

    The four papers in this document address issues of higher education, race, and diversity. First, "The Impact of Diversity on College Students: The Latest Research," reviews recent studies and finds that diversity initiatives, from those focusing on access, to those focusing on campus climate, to those focusing on comprehensive institutional…

  1. UK Higher Education Viewed through the Marketization and Marketing Lenses

    ERIC Educational Resources Information Center

    Nedbalová, Eva; Greenacre, Luke; Schulz, John

    2014-01-01

    This paper uses the Economic Market mechanisms and the 4P Marketing Mix as lenses to review the context of UK higher education (HE) and to explore the relationship between the market and marketing disciplines and practice. Four Economic Market mechanisms--autonomy, competition, price and information--are contrasted with the four Ps of marketing:…

  2. UK Higher Education Viewed through the Marketization and Marketing Lenses

    ERIC Educational Resources Information Center

    Nedbalová, Eva; Greenacre, Luke; Schulz, John

    2014-01-01

    This paper uses the Economic Market mechanisms and the 4P Marketing Mix as lenses to review the context of UK higher education (HE) and to explore the relationship between the market and marketing disciplines and practice. Four Economic Market mechanisms--autonomy, competition, price and information--are contrasted with the four Ps of marketing:…

  3. Stakeholders' Views of South Korea's Higher Education Internationalization Policy

    ERIC Educational Resources Information Center

    Cho, Young Ha; Palmer, John D.

    2013-01-01

    The study investigated the stakeholders' perceptions of South Korea's higher education internationalization policy. Based on the research framework that defines four policy values--propriety, effectiveness, diversity, and engagement, the convergence model was employed with a concurrent mixed method sampling strategy to analyze the stakeholders'…

  4. Higher Education, Race & Diversity: Views from the Field.

    ERIC Educational Resources Information Center

    Humphreys, Debra

    The four papers in this document address issues of higher education, race, and diversity. First, "The Impact of Diversity on College Students: The Latest Research," reviews recent studies and finds that diversity initiatives, from those focusing on access, to those focusing on campus climate, to those focusing on comprehensive institutional…

  5. Details at 11. How the Media View Higher Education.

    ERIC Educational Resources Information Center

    Tanzer, Les

    1980-01-01

    Reasons are given for media myopia about higher education, and suggestions are made for improving news media perceptions: (1) using personalities to enhance the university's image; (2) establishing a program for making faculty expertise available to the media; (3) emphasizing solutions, not problems; and (4) taking risks. (MSE)

  6. Moderator's view: Higher serum bicarbonate in dialysis patients is protective.

    PubMed

    Kalantar-Zadeh, Kamyar

    2016-08-01

    Several observational studies have reported an association between higher serum bicarbonate level and high mortality risk in dialysis patients. However, in such studies mere discovery of associations does not allow one to infer causal relationships. This association may be related to inadequate dietary protein intake that may lead to less acid generation and hence a higher serum bicarbonate level. Since undernutrition is a strong predictor of death in hemodialysis patients, the observed association may be an epiphenomenon and not a biologically plausible relationship. Higher protein and fluid intake between two subsequent hemodialysis treatments may lead to lower serum bicarbonate level. This low bicarbonate level may appear protective, as patients with higher food intake and better appetite generally exhibit greater survival. In the contemporary three-stream proportioning system of hemodialysis treatment, the bicarbonate concentrate is separate from the acid concentrate, and the contribution of the acid concentrate organic acid (acetate, citrate or diacetate) to the delivered bicarbonate pool of the patient is negligible. The concept of 'total buffer' that assumes that the combination of bicarbonate and acetate concentrations in the dialysate are added equally as bicarbonate equivalents is likely wrong and based on the misleading notion that the acetate of the acid concentrate is fully metabolized to bicarbonate in the dialysate. Given these uncertainties it is prudent to avoid excessively high or low bicarbonate levels in dialysis patients. © The Author 2016. Published by Oxford University Press on behalf of ERA-EDTA. All rights reserved.

  7. Stakeholders' Views of South Korea's Higher Education Internationalization Policy

    ERIC Educational Resources Information Center

    Cho, Young Ha; Palmer, John D.

    2013-01-01

    The study investigated the stakeholders' perceptions of South Korea's higher education internationalization policy. Based on the research framework that defines four policy values--propriety, effectiveness, diversity, and engagement, the convergence model was employed with a concurrent mixed method sampling strategy to analyze the stakeholders'…

  8. Higher Education in Japan: A View from Outside.

    ERIC Educational Resources Information Center

    Teichler, Ulrich

    1997-01-01

    Considers criticisms of Japanese higher education focusing on weak links between curricula and societal/professional needs. Analyzes social and policy developments in the early 1990s as they relate to system design, governance and financing, access/admission, teaching and research, relationship of education to careers, and graduate study.…

  9. Higher Education Accreditation in View of International Contemporary Attitudes

    ERIC Educational Resources Information Center

    Sywelem, Mohamed M-Ghoneim; Witte, James E.

    2009-01-01

    Accreditation can be seen as one of several complementary measures in a quality assurance system, and the starting point is the need to maintain and improve good quality in institutions of higher education. Accreditation can play a more or less dominant role in the field of different measures that aim at monitoring, steering, recognizing and…

  10. The Public's View of Higher Education: Implications for Administrators.

    ERIC Educational Resources Information Center

    Owings, Thomas G.

    1986-01-01

    Citizens' attitudes and opinions toward higher education are discussed, based on the results of several public opinion surveys. Before the mid-1970s little research on public opinions and attitudes toward postsecondary education was conducted in the United States. Since 1975 several states have conducted such surveys, and in 1982 the first…

  11. Academic Jeremiad: The Neoconservative View of American Higher Education.

    ERIC Educational Resources Information Center

    Jayne, Edward

    1991-01-01

    Recent books presenting the neoconservative criticism of higher education are reviewed including books by Allan Bloom, Charles Sykes, Jacques Barzun, Peter Shaw, Roger Kimball, and Thomas Short. Common assumptions include the worsening of American education resulting from warped curriculum reform and distorted performance standards. Agreement with…

  12. Academic Jeremiad: The Neoconservative View of American Higher Education.

    ERIC Educational Resources Information Center

    Jayne, Edward

    1991-01-01

    Recent books presenting the neoconservative criticism of higher education are reviewed including books by Allan Bloom, Charles Sykes, Jacques Barzun, Peter Shaw, Roger Kimball, and Thomas Short. Common assumptions include the worsening of American education resulting from warped curriculum reform and distorted performance standards. Agreement with…

  13. Entanglement of higher-derivative oscillators in holographic systems

    NASA Astrophysics Data System (ADS)

    Dimov, Hristo; Mladenov, Stefan; Rashkov, Radoslav C.; Vetsov, Tsvetan

    2017-05-01

    We study the quantum entanglement of coupled Pais-Uhlenbeck oscillators using the formalism of thermo-field dynamics. The entanglement entropy is computed for the specific cases of two and a ring of N coupled Pais-Uhlenbeck oscillators of fourth order. It is shown that the entanglement entropy depends on the temperatures, frequencies and coupling parameters of the different degrees of freedom corresponding to harmonic oscillators. We also make remarks on the appearance of instabilities of higher-derivative oscillators in the context of AdS/CFT correspondence. Finally, we advert to the information geometry theory by calculating the Fisher information metric for the considered system of coupled oscillators.

  14. Higher derivatives and power spectrum in effective single field inflation

    SciTech Connect

    Gong, Jinn-Ouk; Sypsas, Spyros; Seo, Min-Seok E-mail: minseokseo@ibs.re.kr

    2015-03-01

    We study next-to-leading corrections to the effective action of the curvature perturbation obtained by integrating out the coupled heavy isocurvature perturbation. These corrections result from including higher order derivative operators, weighted by the mass scale of the heavy physics, in the effective theory expansion. We find that the correction terms are suppressed by the ratio of the Hubble parameter to the heavy mass scale. The corresponding corrections to the power spectrum of the curvature perturbation are presented for a simple illustrative example.

  15. Higher derivative corrections to incoherent metallic transport in holography

    NASA Astrophysics Data System (ADS)

    Baggioli, Matteo; Goutéraux, Blaise; Kiritsis, Elias; Li, Wei-Jia

    2017-03-01

    Transport in strongly-disordered, metallic systems is governed by diffusive processes. Based on quantum mechanics, it has been conjectured that these diffusivities obey a lower bound D/v 2 ≳ ℏ /k B T , the saturation of which provides a mechanism for the T-linear resistivity of bad metals. This bound features a characteristic velocity v, which was later argued to be the butterfly velocity v B , based on holographic models of transport. This establishes a link between incoherent metallic transport, quantum chaos and Planckian timescales. Here we study higher derivative corrections to an effective holographic action of homogeneous disorder. The higher derivative terms involve only the charge and translation symmetry breaking sector. We show that they have a strong impact on the bound on charge diffusion D c / ν B 2 ≳ ℏ/ k B T, by potentially making the coefficient of its right-hand side arbitrarily small. On the other hand, the bound on energy diffusion is not affected.

  16. Duality groups, automorphic forms, and higher derivative corrections

    SciTech Connect

    Lambert, Neil; West, Peter

    2007-03-15

    We study the higher derivative corrections that occur in type II superstring theories in ten dimensions or less. Assuming invariance under a discrete duality group G(Z) we show that the generic functions of the scalar fields that occur can be identified with automorphic forms. We then give a systematic method to construct automorphic forms from a given group G(Z) together with a chosen subgroup H and a linear representation of G(Z). This construction is based on the theory of nonlinear realizations and we find that the automorphic forms contain the weights of G. We also carry out the dimensional reduction of the generic higher derivative corrections of the IIB theory to three dimensions and find that the weights of E{sub 8} occur generalizing previous results of the authors on M theory. Since the automorphic forms of this theory contain the weights of E{sub 8} we can interpret the occurrence of weights in the dimensional reduction as evidence for an underlying U-duality symmetry.

  17. Holographic response from higher derivatives with homogeneous disorder

    NASA Astrophysics Data System (ADS)

    Fu, Guoyang; Wu, Jian-Pin; Xu, Baicheng; Liu, Jiaqiu

    2017-06-01

    In this letter, we study the charge response from higher derivatives over the background with homogeneous disorder introduced by axions. We first explore the bounds on the higher derivatives coupling from DC conductivity and the anomalies of causality and instabilities. Our results indicate no tighter constraints on the coupling than that over Schwarzschild-AdS (SS-AdS) background. And then we study the optical conductivity of our holographic system. We find that for the case with γ1 < 0 and the disorder strength α ˆ < 2 /√{ 3}, there is a crossover from a coherent to incoherent metallic phase as α ˆ increases. When α ˆ is beyond α ˆ = 2 /√{ 3} and further amplified, a peak exhibits again at low frequency. But it cannot be well fitted by the standard Drude formula and new formula for describing this behavior shall be called for. While for the holographic system with the limit of γ1 → 1 / 48, the disorder effect drives the hard-gap-like at low frequency into the soft gap and suppresses the pronounced peak at medium frequency.

  18. Role of spatial higher order derivatives in momentum space entanglement

    NASA Astrophysics Data System (ADS)

    Kumar, S. Santhosh; Shankaranarayanan, S.

    2017-03-01

    We study the momentum space entanglement between different energy modes of interacting scalar fields propagating in general (D +1 )-dimensional flat space-time. As opposed to some of the recent works [V. Balasubramanian et al., Phys. Rev. D 86, 045014 (2012), 10.1103/PhysRevD.86.045014], we use a Lorentz invariant normalized ground state to obtain the momentum space entanglement entropy. We show that the Lorenz invariant definition removes the spurious power-law behavior obtained in the earlier works. More specifically, we show that the cubic interacting scalar field in (1 +1 ) dimensions leads to logarithmic divergence of the entanglement entropy and is consistent with the results from real space entanglement calculations. We study the effects of the introduction of the Lorentz violating higher derivative terms in the presence of a nonlinear self-interacting scalar field potential and show that the divergence structure of the entanglement entropy is improved in the presence of spatial higher derivative terms.

  19. Pulse transmission transmitter including a higher order time derivate filter

    DOEpatents

    Dress, Jr., William B.; Smith, Stephen F.

    2003-09-23

    Systems and methods for pulse-transmission low-power communication modes are disclosed. A pulse transmission transmitter includes: a clock; a pseudorandom polynomial generator coupled to the clock, the pseudorandom polynomial generator having a polynomial load input; an exclusive-OR gate coupled to the pseudorandom polynomial generator, the exclusive-OR gate having a serial data input; a programmable delay circuit coupled to both the clock and the exclusive-OR gate; a pulse generator coupled to the programmable delay circuit; and a higher order time derivative filter coupled to the pulse generator. The systems and methods significantly reduce lower-frequency emissions from pulse transmission spread-spectrum communication modes, which reduces potentially harmful interference to existing radio frequency services and users and also simultaneously permit transmission of multiple data bits by utilizing specific pulse shapes.

  20. The Unruh effect for higher derivative field theory

    NASA Astrophysics Data System (ADS)

    Berra-Montiel, Jasel; Martínez–Montoya, Jairo; Molgado, Alberto

    2017-04-01

    We analyse the emergence of the Unruh effect within the context of a field Lagrangian theory associated with the Pais–Uhlenbeck fourth order oscillator model. To this end, we introduce a transformation that brings the Hamiltonian bounded from below and is consistent with PT -symmetric quantum mechanics. We find that, as far as we consider different frequencies within the Pais–Uhlenbeck model, a particle together with an antiparticle of different masses are created and may be traced back to the Bogoliubov transformation associated with the interaction between the Unruh–DeWitt detector and the higher derivative scalar field. In contrast, whenever we consider the equal frequencies limit, no particle creation is detected as the pair particle/antiparticle annihilate each other. Further, following Moschella and Schaeffer, we construct a Poincaré invariant two-point function for the Pais–Uhlenbeck model, which in turn allows us to perform the thermal analysis for any of the emanant particles.

  1. Modified teleparallel gravity with higher-derivative torsion terms

    NASA Astrophysics Data System (ADS)

    Otalora, Giovanni; Saridakis, Emmanuel N.

    2016-10-01

    We construct F (T ,(∇T) 2,□T ) gravitational modifications, which are novel classes of modified theories arising from higher-derivative torsional terms in the action and are different than their curvature analogue. Applying them in a cosmological framework, we obtain an effective dark energy sector comprised of the novel torsional contributions. We perform a detailed dynamical analysis for two specific examples, extracting the stable late-time solutions and calculating the corresponding observables. We show that the thermal history of the Universe can be reproduced, and it can result in a dark-energy-dominated, accelerating universe, where the dark-energy equation-of-state parameter lies in the quintessence regime, or may exhibit the phantom-divide crossing during the cosmological evolution. Finally, the scale factor behaves asymptotically, either as a power law or as an exponential, in agreement with observations.

  2. Polymer quantization, stability and higher-order time derivative terms

    NASA Astrophysics Data System (ADS)

    Cumsille, Patricio; Reyes, Carlos M.; Ossandon, Sebastian; Reyes, Camilo

    2016-03-01

    The possibility that fundamental discreteness implicit in a quantum gravity theory may act as a natural regulator for ultraviolet singularities arising in quantum field theory has been intensively studied. Here, along the same expectations, we investigate whether a nonstandard representation called polymer representation can smooth away the large amount of negative energy that afflicts the Hamiltonians of higher-order time derivative theories, rendering the theory unstable when interactions come into play. We focus on the fourth-order Pais-Uhlenbeck model which can be reexpressed as the sum of two decoupled harmonic oscillators one producing positive energy and the other negative energy. As expected, the Schrödinger quantization of such model leads to the stability problem or to negative norm states called ghosts. Within the framework of polymer quantization we show the existence of new regions where the Hamiltonian can be defined well bounded from below.

  3. Cosmological backreaction in higher-derivative gravity expansions

    NASA Astrophysics Data System (ADS)

    Preston, Anthony W. H.

    2016-08-01

    We calculate a general effective stress-energy tensor induced by cosmological inhomogeneity in effective theories of gravity where the action is Taylor-expandable in the Riemann tensor and covariant derivatives of the Riemann tensor. This is of interest as an effective fluid that might provide an alternative to the cosmological constant, but it also applies to gravitational waves. We use an adaptation of Green and Wald's weak-averaging framework, which averages over perturbations in the field equation where the perturbation length scales are small compared to the averaging scale. In this adaptation, the length scale of the effective theory, 1/M, is also taken to be small compared with the averaging scale. This ensures that the perturbation length scales remain in fixed proportion to the length scale of the effective theory as the cosmological averaging scale is taken to be large. We find that backreaction from higher-derivative terms in the effective action can continue to be important in the late universe, given a source of sufficiently high-frequency metric perturbations. This backreaction might also provide a window on exotic particle physics in the far ultraviolet.

  4. Transforming Higher Education: Views from Leaders around the World. Series on Higher Education.

    ERIC Educational Resources Information Center

    Green, Madeleine F., Ed.

    This collection of 16 essays examines forces transforming higher education around the world, including demands for greater access to higher education, funding problems, the conflicting requirements of various constituencies, and pressures to contribute to a country's economic and social development. The essays include: (1) "Forces for Change"…

  5. Transforming Higher Education: Views from Leaders around the World. Series on Higher Education.

    ERIC Educational Resources Information Center

    Green, Madeleine F., Ed.

    This collection of 16 essays examines forces transforming higher education around the world, including demands for greater access to higher education, funding problems, the conflicting requirements of various constituencies, and pressures to contribute to a country's economic and social development. The essays include: (1) "Forces for Change"…

  6. Determining Faculty and Student Views: Applications of Q Methodology in Higher Education

    ERIC Educational Resources Information Center

    Ramlo, Susan

    2012-01-01

    William Stephenson specifically developed Q methodology, or Q, as a means of measuring subjectivity. Q has been used to determine perspectives/views in a wide variety of fields from marketing research to political science but less frequently in education. In higher education, the author has used Q methodology to determine views about a variety of…

  7. On black holes in higher-derivative gravities

    NASA Astrophysics Data System (ADS)

    Bueno, Pablo; Cano, Pablo A.

    2017-09-01

    We establish various general results concerning static and spherically symmetric black hole solutions of general higher-derivative extensions of Einstein gravity. We prove that the only theories susceptible of admitting solutions with gttgrr=-1 and representing the exterior field of a spherically symmetric distribution of mass are those that only propagate a massless and traceless graviton on the vacuum. Then, we provide a simple—and computationally powerful—sufficient condition for a theory to admit solutions of that kind, as well as a systematic way for constructing them for a given theory. We conjecture (and provide strong evidence) that all black holes constructed according to our criteria are completely determined by their mass (non-hairy), such that their thermodynamic properties can be obtained by solving a system of algebraic equations without free parameters. Our results can be straightforwardly extended to planar and hyperbolic horizons. We illustrate this by obtaining new planar asymptotically AdS5 black hole solutions of the recently constructed generalized quasitopological gravity (Hennigar et al Phys. Rev. D 95 104042), which belongs to the class of theories selected by our results.

  8. Productivity as an Indication of Quality in Higher Education: The Views of Employed Graduates in Greece

    ERIC Educational Resources Information Center

    Eliophotou Menon, Maria

    2016-01-01

    The paper investigates the views of Greek university graduates on the link between higher education and productivity in order to determine the extent to which productivity can be considered to be an indication of quality in higher education. It also investigates the perceived effect of the type and content of higher education on productivity;…

  9. German and UK Higher Education and Graduate Employment: The Interface between Systemic Tradition and Graduate Views

    ERIC Educational Resources Information Center

    Johnston, Brenda; Elton, Lewis

    2005-01-01

    This article presents a comparative analysis of the German and UK higher education systems and their relationship to graduate employment. It scrutinizes the complex interconnections between (1) higher education systems and traditions; (2) the role of higher education in the state, society and the economy; and (3) the views of graduates as…

  10. Productivity as an Indication of Quality in Higher Education: The Views of Employed Graduates in Greece

    ERIC Educational Resources Information Center

    Eliophotou Menon, Maria

    2016-01-01

    The paper investigates the views of Greek university graduates on the link between higher education and productivity in order to determine the extent to which productivity can be considered to be an indication of quality in higher education. It also investigates the perceived effect of the type and content of higher education on productivity;…

  11. Fractional Hamiltonian analysis of higher order derivatives systems

    SciTech Connect

    Baleanu, Dumitru; Muslih, Sami I.; Tas, Kenan

    2006-10-15

    The fractional Hamiltonian analysis of 1+1 dimensional field theory is investigated and the fractional Ostrogradski's formulation is obtained. The fractional path integral of both simple harmonic oscillator with an acceleration-squares part and a damped oscillator are analyzed. The classical results are obtained when fractional derivatives are replaced with the integer order derivatives.

  12. The period functionsʼ higher order derivatives

    NASA Astrophysics Data System (ADS)

    Sabatini, M.

    We prove a formula for the n-th derivative of the period function T in a period annulus of a planar differential system. For n=1, we obtain Freire, Gasull and Guillamon formula for the period's first derivative (Chicone and Dumortier, 1993) [17]. We apply such a result to Hamiltonian systems with separable variables and other systems. We give some sufficient conditions for the period function of conservative second order ODE's to be convex.

  13. Why Is Quality in Higher Education Not Achieved? The View of Academics

    ERIC Educational Resources Information Center

    Cardoso, Sónia; Rosa, Maria J.; Stensaker, Bjørn

    2016-01-01

    Quality assurance is currently an established activity in Europe, driven either by national quality assurance agencies or by institutions themselves. However, whether quality assurance is perceived as actually being capable of promoting quality is still a question open to discussion. Based on three different views on quality derived from the…

  14. Why Is Quality in Higher Education Not Achieved? The View of Academics

    ERIC Educational Resources Information Center

    Cardoso, Sónia; Rosa, Maria J.; Stensaker, Bjørn

    2016-01-01

    Quality assurance is currently an established activity in Europe, driven either by national quality assurance agencies or by institutions themselves. However, whether quality assurance is perceived as actually being capable of promoting quality is still a question open to discussion. Based on three different views on quality derived from the…

  15. Derivation of Electronic Course Templates for Use in Higher Education

    ERIC Educational Resources Information Center

    Hill, Robin K.; Fresen, Jill W.; Geng, Fawei

    2012-01-01

    Lecturers in higher education often consider the incorporation of web technologies into their teaching practice. Partially structured and populated course site templates could aid them in getting started with creating and deploying web-based materials and activities to enrich the teaching and learning experience. Discussions among instructional…

  16. Hamiltonian analysis of higher derivative scalar-tensor theories

    NASA Astrophysics Data System (ADS)

    Langlois, David; Noui, Karim

    2016-07-01

    We perform a Hamiltonian analysis of a large class of scalar-tensor Lagrangians which depend quadratically on the second derivatives of a scalar field. By resorting to a convenient choice of dynamical variables, we show that the Hamiltonian can be written in a very simple form, where the Hamiltonian and the momentum constraints are easily identified. In the case of degenerate Lagrangians, which include the Horndeski and beyond Horndeski quartic Lagrangians, our analysis confirms that the dimension of the physical phase space is reduced by the primary and secondary constraints due to the degeneracy, thus leading to the elimination of the dangerous Ostrogradsky ghost. We also present the Hamiltonian formulation for nondegenerate theories and find that they contain four degrees of freedom, including a ghost, as expected. We finally discuss the status of the unitary gauge from the Hamiltonian perspective.

  17. Carrier derivation in higher-stage QAM-signals

    NASA Astrophysics Data System (ADS)

    Hoffmann, Michael H. W.

    1988-11-01

    A concept for the carrier recovery of a QAM-signal is presented, for application to higher-stage QAM-signals. Starting from the requirements for a good phase detector, the status of the methods for carrier regeneration of a QAM-signal is outlined. The concept is based on decisions concerning amplitude and phase of the complex envelope of the input signal. It leads to phase detector characteristics which combine good acquisition behavior with good properties after synchronization. A realization, suited for applications with high data rates, is presented.

  18. Higher derivative corrections to the Wess-Zumino action

    NASA Astrophysics Data System (ADS)

    Jalali, Ali; Garousi, Mohammad R.

    2016-10-01

    In the first part of this paper, we calculate the disk-level S -matrix elements of one Ramond-Ramond (RR), one Neveu-Schwarz-Neveu-Schwarz (NSNS), and one Neveu-Schwarz (NS) vertex operator, and show that they are consistent with the amplitudes that have been recently found by applying various Ward identities. We show that the massless poles of the amplitude at low energy are fully consistent with the known D -brane couplings at order α'2 that involve one RR or NSNS and two NS fields. Subtracting the massless poles, we then find the contact terms of one RR, one NSNS and one NS fields at order α'2 . Some of these terms are reproduced by the Taylor expansion and the pullback of two closed string couplings; some other couplings are reproduced by the linear graviton in the second fundamental form and by the B -field in the gauge field extension F →F +B , in one closed and two open string couplings. In the second part, we write all of the independent covariant contractions of one RR, one NSNS, and one NS fields with unknown coefficients. We then constrain the couplings to be consistent with the linear T duality and with the above contact terms. Interestingly, we have found that up to total derivative terms and Bianchi identities, these constraints uniquely fix all the unknown coefficients.

  19. Effects of higher-order aberration correction on stereopsis at different viewing durations

    NASA Astrophysics Data System (ADS)

    Kang, Jian; Xiao, Fei; Zhao, Junlei; Zhao, Haoxin; Hu, Yiyun; Tang, Guomao; Dai, Yun; Zhang, Yudong

    2015-07-01

    To better understand how the eye's optics affects stereopsis, we measured stereoacuity before and after higher-order aberration (HOA) correction with a binocular adaptive optics visual simulator. The HOAs were corrected either binocularly or monocularly in the better eye (the eye with better contrast sensitivity). A two-line stereo pattern served as the visual stimulus. Stereo thresholds at different viewing durations were obtained with the psychophysical method of constant stimuli. Binocular HOA correction led to significant improvement in stereoacuity. However, better eye HOA correction could bring either a bad degradation or a slight improvement in stereoacuity. As viewing duration increased, the stereo benefit approached the level of 1.0 for both binocular and better eye correction, suggesting that long viewing durations might weaken the effects of the eye's optical quality on stereopsis.

  20. A hierarchical generalization of the acoustic reciprocity theorem involving higher-order derivatives and interaction quantities.

    PubMed

    Lin, Ju; Li, Jie; Li, Xiaolei; Wang, Ning

    2016-10-01

    An acoustic reciprocity theorem is generalized, for a smoothly varying perturbed medium, to a hierarchy of reciprocity theorems including higher-order derivatives of acoustic fields. The standard reciprocity theorem is the first member of the hierarchy. It is shown that the conservation of higher-order interaction quantities is related closely to higher-order derivative distributions of perturbed media. Then integral reciprocity theorems are obtained by applying Gauss's divergence theorem, which give explicit integral representations connecting higher-order interactions and higher-order derivative distributions of perturbed media. Some possible applications to an inverse problem are also discussed.

  1. Perturbative generation of the higher-derivative Lorentz-breaking terms

    NASA Astrophysics Data System (ADS)

    Mariz, T.; Nascimento, J. R.; Petrov, A. Yu.

    2012-06-01

    In this paper, we describe the perturbative generation of the higher-derivative Lorentz-breaking terms for the gauge field, that is, the Myers-Pospelov term and the higher-derivative Carroll-Field-Jackiw term. These terms are explicitly calculated in the one-loop approximation and shown to be finite and ambiguous.

  2. [Generic skills in higher education. Comparative study of the views of employers and academics].

    PubMed

    Palmer Pol, Alfonso; Montaño Moreno, Juan J; Palou Oliver, María

    2009-08-01

    This paper analyzes and compares employers' and academics' views on the importance of generic skills in training graduates and the level acquired in higher education. We used a sample of 500 companies and public institutions in the Balearic Islands that have university graduates among their employees and a sample of 173 academics from the University of the Balearic Islands. We used survey methodology to collect the data and compared the descriptive results of these two groups. These results highlight the difference of opinion of the two groups.

  3. Pulse transmission receiver with higher-order time derivative pulse correlator

    DOEpatents

    Dress, Jr., William B.; Smith, Stephen F.

    2003-09-16

    Systems and methods for pulse-transmission low-power communication modes are disclosed. A pulse transmission receiver includes: a higher-order time derivative pulse correlator; a demodulation decoder coupled to the higher-order time derivative pulse correlator; a clock coupled to the demodulation decoder; and a pseudorandom polynomial generator coupled to both the higher-order time derivative pulse correlator and the clock. The systems and methods significantly reduce lower-frequency emissions from pulse transmission spread-spectrum communication modes, which reduces potentially harmful interference to existing radio frequency services and users and also simultaneously permit transmission of multiple data bits by utilizing specific pulse shapes.

  4. On the quantisation of complex higher derivative theories and avoiding the Ostrogradsky ghost

    NASA Astrophysics Data System (ADS)

    Raidal, Martti; Veermäe, Hardi

    2017-03-01

    Generic higher derivative theories are believed to be fundamentally unphysical because they contain Ostrogradsky ghosts. We show that within complex classical mechanics it is possible to construct higher derivative theories that circumvent the Ostrogradsky theorem and have a real energy spectrum that is bounded from below. The complex theory can be canonically quantised. The resulting quantum theory does not suffer from the kinetic instability and maintains the usual probabilistic interpretation without violating the correspondence principle. As a proof of concept, we construct a class of stable interacting complex higher derivative theories and present a concrete example. This consistent and canonical framework allows us to analyse the previous attempts to avoid ghosts that use non-canonical quantisation schemes, such as the Lee-Wick theories, Dirac-Pauli quantisation or PT-symmetric quantum mechanics. The key to understand the would-be ghosts in any kinetically stable higher derivative theory is to accept the complex system behind it.

  5. Higher-derivative mechanics with N=2 l-conformal Galilei supersymmetry

    SciTech Connect

    Masterov, Ivan

    2015-02-15

    The analysis previously developed in [J. Math. Phys. 55 102901 (2014)] is used to construct systems which hold invariant under N=2 l-conformal Galilei superalgebra. The models describe two different supersymmetric extensions of a free higher-derivative particle. Their Newton-Hooke counterparts are derived by applying appropriate coordinate transformations.

  6. On (in)stabilities of perturbations in mimetic models with higher derivatives

    NASA Astrophysics Data System (ADS)

    Zheng, Yunlong; Shen, Liuyuan; Mou, Yicen; Li, Mingzhe

    2017-08-01

    Usually when applying the mimetic model to the early universe, higher derivative terms are needed to promote the mimetic field to be dynamical. However such models suffer from the ghost and/or the gradient instabilities and simple extensions cannot cure this pathology. We point out in this paper that it is possible to overcome this difficulty by considering the direct couplings of the higher derivatives of the mimetic field to the curvature of the spacetime.

  7. Impacts of supersymmetric higher derivative terms on inflation models in supergravity

    SciTech Connect

    Aoki, Shuntaro; Yamada, Yusuke

    2015-07-14

    We show the effects of supersymmetric higher derivative terms on inflation models in supergravity. The results show that such terms generically modify the effective kinetic coefficient of the inflaton during inflation if the cut off scale of the higher derivative operators is sufficiently small. In such a case, the η-problem in supergravity does not occur, and we find that the effective potential of the inflaton generically becomes a power type potential with a power smaller than two.

  8. Impacts of supersymmetric higher derivative terms on inflation models in supergravity

    SciTech Connect

    Aoki, Shuntaro; Yamada, Yusuke E-mail: yuusuke-yamada@asagi.waseda.jp

    2015-07-01

    We show the effects of supersymmetric higher derivative terms on inflation models in supergravity. The results show that such terms generically modify the effective kinetic coefficient of the inflaton during inflation if the cut off scale of the higher derivative operators is sufficiently small. In such a case, the η-problem in supergravity does not occur, and we find that the effective potential of the inflaton generically becomes a power type potential with a power smaller than two.

  9. Higher-derivative Lorentz-breaking terms in extended QED at the finite temperature

    NASA Astrophysics Data System (ADS)

    Celeste, A.; Mariz, T.; Nascimento, J. R.; Petrov, A. Yu.

    2016-03-01

    In this paper we discuss finiteness and ambiguities of the higher-derivative Lorentz-breaking terms in extended QED with a magnetic coupling at the finite temperature. We find that, besides the higher-derivative Carroll-Field-Jackiw-like term and Myers-Pospelov term, many extra terms arise in a finite temperature case but these terms vanish in high temperature limit. Moreover, the contributions for the nonminimal coupling will dominate at large temperatures.

  10. C T for higher derivative conformal fields and anomalies of (1 , 0) superconformal 6d theories

    NASA Astrophysics Data System (ADS)

    Beccaria, Matteo; Tseytlin, Arkady A.

    2017-06-01

    In [8] we proposed the linear relations between the Weyl anomaly c1, c2, c3 coefficients and the 4 coefficients in the chiral anomaly polynomial for (1,0) superconformal 6d theories. These relations were determined up to one free parameter ξ and its value was then conjectured using some additional assumptions. A different value for ξ was recently suggested in arXiv:1702.03518 using an alternative method. Here we confirm that this latter value is indeed the correct one by providing an additional data point: the Weyl anomaly coefficient c3 for the higher derivative (1,0) superconformal 6d vector multiplet. This multiplet contains the 4-derivative conformal gauge vector, 3-derivative fermion and 2-derivative scalar. We find the corresponding value of c3 which is proportional to the coefficient C T in the 2-point function of stress tensor using its relation to the first derivative of the Renyi entropy or the second derivative of the free energy on the product of thermal circle and 5d hyperbolic space. We present some general results of the computation of the Rényi entropy and C T from the partition function on S 1 × ℍ d - 1 for higher derivative conformal scalars, spinors and vectors in even dimensions. We also give an independent derivation of the conformal anomaly coefficients of the 6d higher derivative vector multiplet from the Seeley-DeWitt coefficients on an Einstein background.

  11. Warped AdS3 black holes in higher derivative gravity theories

    NASA Astrophysics Data System (ADS)

    Detournay, Stéphane; Douxchamps, Laure-Anne; Ng, Gim Seng; Zwikel, Céline

    2016-06-01

    We consider warped AdS3 black holes in generic higher derivatives gravity theories in 2+1 dimensions. The asymptotic symmetry group of the phase space containing these black holes is the semi-direct product of a centrally extended Virasoro algebra and an affine u(1) Kac-Moody algebra. Previous works have shown that in some specific theories, the entropy of these black holes agrees with a Cardy-like entropy formula derived for warped conformal field theories. In this paper, we show that this entropy matching continues to hold for the most general higher derivative theories of gravity. We also discuss the existence of phase transitions.

  12. Asymptotic safety of higher derivative quantum gravity non-minimally coupled with a matter system

    NASA Astrophysics Data System (ADS)

    Hamada, Yuta; Yamada, Masatoshi

    2017-08-01

    We study asymptotic safety of models of the higher derivative quantum gravity with and without matter. The beta functions are derived by utilizing the functional renormalization group, and non-trivial fixed points are found. It turns out that all couplings in gravity sector, namely the cosmological constant, the Newton constant, and the R 2 and R μν 2 coupling constants, are relevant in case of higher derivative pure gravity. For the Higgs-Yukawa model non-minimal coupled with higher derivative gravity, we find a stable fixed point at which the scalar-quartic and the Yukawa coupling constants become relevant. The relevant Yukawa coupling is crucial to realize the finite value of the Yukawa coupling constants in the standard model.

  13. Local Discontinuous Galerkin Methods for Partial Differential Equations with Higher Order Derivatives

    NASA Technical Reports Server (NTRS)

    Yan, Jue; Shu, Chi-Wang; Bushnell, Dennis M. (Technical Monitor)

    2002-01-01

    In this paper we review the existing and develop new continuous Galerkin methods for solving time dependent partial differential equations with higher order derivatives in one and multiple space dimensions. We review local discontinuous Galerkin methods for convection diffusion equations involving second derivatives and for KdV type equations involving third derivatives. We then develop new local discontinuous Galerkin methods for the time dependent bi-harmonic type equations involving fourth derivatives, and partial differential equations involving fifth derivatives. For these new methods we present correct interface numerical fluxes and prove L(exp 2) stability for general nonlinear problems. Preliminary numerical examples are shown to illustrate these methods. Finally, we present new results on a post-processing technique, originally designed for methods with good negative-order error estimates, on the local discontinuous Galerkin methods applied to equations with higher derivatives. Numerical experiments show that this technique works as well for the new higher derivative cases, in effectively doubling the rate of convergence with negligible additional computational cost, for linear as well as some nonlinear problems, with a local uniform mesh.

  14. Higher-derivative scalar-vector-tensor theories: black holes, Galileons, singularity cloaking and holography

    NASA Astrophysics Data System (ADS)

    Charmousis, C.; Goutéraux, B.; Kiritsis, E.

    2012-09-01

    We consider a general Kaluza-Klein reduction of a truncated Lovelock theory. We find necessary geometric conditions for the reduction to be consistent. The resulting lower-dimensional theory is a higher derivative scalar-tensor theory, depends on a single real parameter and yields second-order field equations. Due to the presence of higher-derivative terms, the theory has multiple applications in modifications of Einstein gravity (Galileon/Horndesky theory) and holography (Einstein-Maxwell-Dilaton theories). We find and analyze charged black hole solutions with planar or curved horizons, both in the `Einstein' and `Galileon' frame, with or without cosmological constant. Naked singularities are dressed by a geometric event horizon originating from the higher-derivative terms. The near-horizon region of the near-extremal black hole is unaffected by the presence of the higher derivatives, whether scale invariant or hyperscaling violating. In the latter case, the area law for the entanglement entropy is violated logarithmically, as expected in the presence of a Fermi surface. For negative cosmological constant and planar horizons, thermodynamics and first-order hydrodynamics are derived: the shear viscosity to entropy density ratio does not depend on temperature, as expected from the higher-dimensional scale invariance.

  15. Futuristic World Views: Modern Physics and Feminism. Implications for Teaching/Learning in Higher Education.

    ERIC Educational Resources Information Center

    Perreault, Gerri

    Modern physics and feminism are two seemingly disparate areas of human endeavor that pose important alternatives to and transformations of contemporary world views. Modern physics is a radical shift from the world view of classical physics, and feminism is a radical shift from the world view of patriarchy. Both emphasize interrelatedness and…

  16. Gauge invariances of higher derivative Maxwell-Chern-Simons field theory: A new Hamiltonian approach

    NASA Astrophysics Data System (ADS)

    Mukherjee, Pradip; Paul, Biswajit

    2012-02-01

    A new method of abstracting the independent gauge invariances of higher derivative systems, recently introduced in [R. Banerjee, P. Mukherjee, and B. Paul, J. High Energy Phys.JHEPFG1029-8479 08 (2011) 085.10.1007/JHEP08(2011)085], has been applied to higher derivative field theories. This has been discussed taking the extended Maxwell-Chern-Simons model as an example. A new Hamiltonian analysis of the model is provided. This Hamiltonian analysis has been used to construct the independent gauge generator. An exact mapping between the Hamiltonian gauge transformations and the U(1) symmetries of the action has been established.

  17. BTZ black holes and flat space cosmologies in higher derivative theories

    NASA Astrophysics Data System (ADS)

    Zwikel, Céline

    2017-04-01

    We consider BTZ black holes and flat space cosmologies in generic higher derivative gravity theories in 2  +  1 dimensions. Our goal is to prove the match between the bulk Iyer–Wald entropy and the field theory entropy for various symmetry algebras (CFT2, Warped CFT2, BMS3). We also discuss phase transitions in higher curvature theories, and argue that, in the flat case, there is strictly speaking no phase transition in the grand canonical ensemble.

  18. An Alternative Proposition to Lewis' Views on the "Constructions of Professional Identity in a Dynamic Higher Education Sector"

    ERIC Educational Resources Information Center

    Feather, Denis

    2015-01-01

    This paper offers an alternative proposition to that of Lewis on identity and professional identity in higher education (HE). The proposition is provided from the narratives of 26 individual interviewees who deliver HE in college-based higher education, a viewpoint not considered by Lewis, who tends to adopt a more generalist view. Where Lewis…

  19. An Alternative Proposition to Lewis' Views on the "Constructions of Professional Identity in a Dynamic Higher Education Sector"

    ERIC Educational Resources Information Center

    Feather, Denis

    2015-01-01

    This paper offers an alternative proposition to that of Lewis on identity and professional identity in higher education (HE). The proposition is provided from the narratives of 26 individual interviewees who deliver HE in college-based higher education, a viewpoint not considered by Lewis, who tends to adopt a more generalist view. Where Lewis…

  20. Television viewing and age at smoking initiation: does a relationship exist between higher levels of television viewing and earlier onset of smoking?

    PubMed

    Gutschoven, Klaas; Van den Bulck, Jan

    2005-06-01

    This cross-sectional study of children assessed the association between television viewing and age at smoking initiation, using self-reports administered by research assistants in schools. Participants were 909 students in their first and fourth years of secondary education in a random sample of 15 secondary schools in Flanders, Belgium, who had smoked at least one cigarette. The main outcome measure was age at smoking initiation. The independent variable was weekly television viewing volume. Gender, educational level, parental smoking, and peer smoking were the control variables. The relationship between television viewing and age at smoking initiation was significant. Higher levels of television viewing were related to earlier onset of smoking behavior in adolescents. The relationship of television viewing with age at smoking initiation was stronger than that of peer smoking, parental smoking, and gender. For each hour of television viewing per day, the average smoking initiation age decreased by 60 days. Heavier television viewers start smoking at an earlier age. Two possible explanations for this relationship are suggested. Social learning theory suggests that actors and actresses serve as behavioral role models for heavy viewers. Cultivation theory suggests that exposure to positive messages influences smoking attitudes. Further research should examine whether the relationship is causal and whether television acts as a provider of smoking role models or whether it influences smoking attitudes.

  1. On the curious spectrum of duality invariant higher-derivative gravity

    SciTech Connect

    Hohm, Olaf; Naseer, Usman; Zwiebach, Barton

    2016-08-31

    Here, we analyze the spectrum of the exactly duality and gauge invariant higher-derivative double field theory. While this theory is based on a chiral CFT and does not correspond to a standard string theory, our analysis illuminates a number of issues central in string theory. The full quadratic action is rewritten as a two-derivative theory with additional fields. This allows for a simple analysis of the spectrum, which contains two massive spin-2 ghosts and massive scalars, in addition to the massless fields. Moreover, in this formulation, the massless or tensionless limit α' → ∞ is non-singular and leads to an enhanced gauge symmetry. We show that the massive modes can be integrated out exactly at the quadratic level, leading to an infinite series of higher-derivative corrections. Lastly, we present a ghost-free massive extension of linearized double field theory, which employs a novel mass term for the dilaton and metric.

  2. Higher-order numerical methods derived from three-point polynomial interpolation

    NASA Technical Reports Server (NTRS)

    Rubin, S. G.; Khosla, P. K.

    1976-01-01

    Higher-order collocation procedures resulting in tridiagonal matrix systems are derived from polynomial spline interpolation and Hermitian finite-difference discretization. The equations generally apply for both uniform and variable meshes. Hybrid schemes resulting from different polynomial approximations for first and second derivatives lead to the nonuniform mesh extension of the so-called compact or Pade difference techniques. A variety of fourth-order methods are described and this concept is extended to sixth-order. Solutions with these procedures are presented for the similar and non-similar boundary layer equations with and without mass transfer, the Burgers equation, and the incompressible viscous flow in a driven cavity. Finally, the interpolation procedure is used to derive higher-order temporal integration schemes and results are shown for the diffusion equation.

  3. Second- and Higher-Order Virial Coefficients Derived from Equations of State for Real Gases

    ERIC Educational Resources Information Center

    Parkinson, William A.

    2009-01-01

    Derivation of the second- and higher-order virial coefficients for models of the gaseous state is demonstrated by employing a direct differential method and subsequent term-by-term comparison to power series expansions. This communication demonstrates the application of this technique to van der Waals representations of virial coefficients.…

  4. Metric-affine formalism of higher derivative scalar fields in cosmology

    SciTech Connect

    Li, Mingzhe; Wang, Xiulian E-mail: wangxiulian2000@yahoo.com.cn

    2012-07-01

    Higher derivative scalar field theories have received considerable attention for the potentially explanations of the initial state of the universe or the current cosmic acceleration which they might offer. They have also attracted many interests in the phenomenological studies of infrared modifications of gravity. These theories are mostly studied by the metric variational approach in which only the metric is the fundamental field to account for the gravitation. In this paper we study the higher derivative scalar fields with the metric-affine formalism where the affine connection is treated arbitrarily at the beginning. Because the higher derivative scalar fields couple to the connection directly in a covariant theory these two formalisms will lead to different results. These differences are suppressed by the powers of the Planck mass and are usually expected to have small effects. But in some cases they may cause non-negligible deviations. We show by a higher derivative dark energy model that the two formalisms lead to significantly different pictures of the future universe.

  5. Higher Education and Critical Citizenship: A Survey of Academics' Views in Scotland and England

    ERIC Educational Resources Information Center

    Paterson, Lindsay; Bond, Ross

    2005-01-01

    The views of academics in England and Scotland on developing critical citizenship among their students were investigated using a combination of survey data and interviews. Academics in Scotland and England had different views about the role of critical citizenship. In Scotland, the most civic interpretation of these capacities tended to be held by…

  6. Mass Gap for Black-Hole Formation in Higher-Derivative and Ghost-Free Gravity.

    PubMed

    Frolov, Valeri P

    2015-07-31

    We study a spherical gravitational collapse of a small mass in higher-derivative and ghost-free theories of gravity. By boosting a solution of linearized equations for a static point mass in such theories we obtain in the Penrose limit the gravitational field of an ultrarelativistic particle. Taking a superposition of such solutions we construct a metric of a collapsing null shell in the linearized higher-derivative and ghost-free gravity. The latter allows one to find the gravitational field of a thick null shell. By analyzing these solutions we demonstrate that in a wide class of the higher dimensional theories of gravity as well as for the ghost-free gravity there exists a mass gap for mini-black-hole production. We also found conditions when the curvature invariants remain finite at r=0 for the collapse of the thick null shell.

  7. Regularity properties of fiber derivatives associated with higher-order mechanical systems

    NASA Astrophysics Data System (ADS)

    Colombo, Leonardo; Prieto-Martínez, Pedro Daniel

    2016-08-01

    The aim of this work is to study fiber derivatives associated to Lagrangian and Hamiltonian functions describing the dynamics of a higher-order autonomous dynamical system. More precisely, given a function in T∗T(k-1)Q, we find necessary and sufficient conditions for such a function to describe the dynamics of a kth-order autonomous dynamical system, thus being a kth-order Hamiltonian function. Then, we give a suitable definition of (hyper)regularity for these higher-order Hamiltonian functions in terms of their fiber derivative. In addition, we also study an alternative characterization of the dynamics in Lagrangian submanifolds in terms of the solutions of the higher-order Euler-Lagrange equations.

  8. Mass Gap for Black-Hole Formation in Higher-Derivative and Ghost-Free Gravity

    NASA Astrophysics Data System (ADS)

    Frolov, Valeri P.

    2015-07-01

    We study a spherical gravitational collapse of a small mass in higher-derivative and ghost-free theories of gravity. By boosting a solution of linearized equations for a static point mass in such theories we obtain in the Penrose limit the gravitational field of an ultrarelativistic particle. Taking a superposition of such solutions we construct a metric of a collapsing null shell in the linearized higher-derivative and ghost-free gravity. The latter allows one to find the gravitational field of a thick null shell. By analyzing these solutions we demonstrate that in a wide class of the higher dimensional theories of gravity as well as for the ghost-free gravity there exists a mass gap for mini-black-hole production. We also found conditions when the curvature invariants remain finite at r =0 for the collapse of the thick null shell.

  9. Higher-derivative gravity with non-minimally coupled Maxwell field

    NASA Astrophysics Data System (ADS)

    Feng, Xing-Hui; Lü, H.

    2016-04-01

    We construct higher-derivative gravities with a non-minimally coupled Maxwell field. The Lagrangian consists of polynomial invariants built from the Riemann tensor and the Maxwell field strength in such a way that the equations of motion are second order for both the metric and the Maxwell potential. We also generalize the construction to involve a generic non-minimally coupled p-form field strength. We then focus on one low-lying example in four dimensions and construct the exact magnetically charged black holes. We also construct exact electrically charged z=2 Lifshitz black holes. We obtain approximate dyonic black holes for the small coupling constant or small charges. We find that the thermodynamics based on the Wald formalism disagrees with that derived from the Euclidean action procedure, suggesting this may be a general situation in higher-derivative gravities with non-minimally coupled form fields. As an application in the AdS/CFT correspondence, we study the entropy/viscosity ratio for the AdS or Lifshitz planar black holes, and find that the exact ratio can be obtained without having to know the details of the solutions, even for this higher-derivative theory.

  10. Nonparaxial scalar Airy light-sheets and their higher-order spatial derivatives

    NASA Astrophysics Data System (ADS)

    Mitri, F. G.

    2017-02-01

    Based on the angular spectrum decomposition method in plane waves, a generalized nonparaxial analytical solution for the electric field of a transverse electric Airy light-sheet including its spatial derivatives is formulated and presented. The beam-shape coefficients are expressed by an improper integral, which includes the generation of evanescent waves. The radiated component of the field is computed, and the cross-sectional plots display unique features of the nonparaxial Airy light-sheet and its higher-order derivatives. The results find important applications in predicting/computing the optical scattering, radiation force, and torque on an object using the multipole expansion method in cylindrical coordinates and particle dynamics.

  11. Massive higher derivative gravity in D-dimensional anti-de Sitter spacetimes

    SciTech Connect

    Guellue, Ibrahim; Tekin, Bayram

    2009-09-15

    We find the propagator and calculate the tree level scattering amplitude between two covariantly conserved sources in an anti-de Sitter background for the most general D-dimensional quadratic, four-derivative, gravity with a Pauli-Fierz mass. We also calculate the Newtonian potential for various limits of the theory in flat space. We show how the recently introduced three-dimensional New Massive Gravity is uniquely singled out among higher derivative models as a (tree level) unitary model and that its Newtonian limit is equivalent to that of the usual massive gravity in flat space.

  12. Regularization by higher derivatives and quantum correction for N = 1 supersymmetric theories

    NASA Astrophysics Data System (ADS)

    Pimenov, A. B.; Soloshenko, A. A.; Stepanyantz, K. V.; Shevtsova, E. S.

    2008-05-01

    Some results of regularization by higher covariant derivatives used for investigation of the structure of quantum corrections in N = 1 supersymmetric theories are summarized in the present work. In particular, it is demonstrated that all integrals determining the Hell-Mann-Low functions in supersymmetric theories are integrals of total derivatives. As a consequence, in the N = 1 supersymmetric theories there exists an identity for the Green’s functions which follows from none of the symmetry theories known thus far. The problem of obtaining the exact β-function by the methods of perturbation theory is discussed.

  13. Higher derivative corrections to BPS black hole attractors in 4d gauged supergravity

    NASA Astrophysics Data System (ADS)

    Hristov, Kiril; Katmadas, Stefanos; Lodato, Ivano

    2016-05-01

    We analyze BPS black hole attractors in 4d gauged supergravity in the presence of higher derivative supersymmetric terms, including a Weyl-squared-type action, and determine the resulting corrections to the Bekenstein-Hawking entropy. The near-horizon geometry AdS2×S2 (or other Riemann surface) preserves half of the supercharges in N = 2 supergravity with Fayet-Iliopoulos gauging. We derive a relation between the entropy and the black hole charges that suggests via AdS/CFT how subleading corrections contribute to the supersymmetric index in the dual microscopic picture.

  14. New Higher-Derivative R{sup 4} Theorems for Graviton Scattering

    SciTech Connect

    Berkovits, Nathan

    2007-05-25

    The nonminimal pure spinor formalism for the superstring is used to prove two new multiloop theorems which are related to recent higher-derivative R{sup 4} conjectures of Green, Russo, and Vanhove. The first theorem states that when 0derivative}{sup n}R{sup 4} terms in the Type II effective action do not receive perturbative contributions above n/2 loops. The second theorem states that when n{<=}8, perturbative contributions to {partial_derivative}{sup n}R{sup 4} terms in the IIA and IIB effective actions coincide. As shown by Green, Russo, and Vanhove, these results suggest that d=4 N=8 supergravity is ultraviolet finite up to eight loops.

  15. Hamilton-Jacobi approach for first order actions and theories with higher derivatives

    SciTech Connect

    Bertin, M.C. Pimentel, B.M. Pompeia, P.J.

    2008-03-15

    In this work, we analyze systems described by Lagrangians with higher order derivatives in the context of the Hamilton-Jacobi formalism for first order actions. Two different approaches are studied here: the first one is analogous to the description of theories with higher derivatives in the hamiltonian formalism according to [D.M. Gitman, S.L. Lyakhovich, I.V. Tyutin, Soviet Phys. J. 26 (1983) 730; D.M. Gitman, I.V. Tyutin, Quantization of Fields with Constraints, Springer-Verlag, New York, Berlin, 1990] the second treats the case where degenerate coordinate are present, in an analogy to reference [D.M. Gitman, I.V. Tyutin, Nucl. Phys. B 630 (2002) 509]. Several examples are analyzed where a comparison between both approaches is made.

  16. Non-Schwarzschild black-hole metric in four dimensional higher derivative gravity: Analytical approximation

    NASA Astrophysics Data System (ADS)

    Kokkotas, K. D.; Konoplya, R. A.; Zhidenko, A.

    2017-09-01

    Higher derivative extensions of Einstein gravity are important within the string theory approach to gravity and as alternative and effective theories of gravity. H. Lü, A. Perkins, C. Pope, and K. Stelle [Phys. Rev. Lett. 114, 171601 (2015), 10.1103/PhysRevLett.114.171601] found a numerical solution describing a spherically symmetric non-Schwarzschild asymptotically flat black hole in Einstein gravity with added higher derivative terms. Using the general and quickly convergent parametrization in terms of the continued fractions, we represent this numerical solution in the analytical form, which is accurate not only near the event horizon or far from the black hole, but in the whole space. Thereby, the obtained analytical form of the metric allows one to study easily all the further properties of the black hole, such as thermodynamics, Hawking radiation, particle motion, accretion, perturbations, stability, quasinormal spectrum, etc. Thus, the found analytical approximate representation can serve in the same way as an exact solution.

  17. Hamilton Jacobi approach for first order actions and theories with higher derivatives

    NASA Astrophysics Data System (ADS)

    Bertin, M. C.; Pimentel, B. M.; Pompeia, P. J.

    2008-03-01

    In this work, we analyze systems described by Lagrangians with higher order derivatives in the context of the Hamilton-Jacobi formalism for first order actions. Two different approaches are studied here: the first one is analogous to the description of theories with higher derivatives in the hamiltonian formalism according to [D.M. Gitman, S.L. Lyakhovich, I.V. Tyutin, Soviet Phys. J. 26 (1983) 730; D.M. Gitman, I.V. Tyutin, Quantization of Fields with Constraints, Springer-Verlag, New York, Berlin, 1990] the second treats the case where degenerate coordinate are present, in an analogy to reference [D.M. Gitman, I.V. Tyutin, Nucl. Phys. B 630 (2002) 509]. Several examples are analyzed where a comparison between both approaches is made.

  18. Derivation of Feynman rules for higher order poles using cross-ratio identities in CHY construction

    NASA Astrophysics Data System (ADS)

    Zhou, Kang; Rao, Junjie; Feng, Bo

    2017-06-01

    In order to generalize the integration rules to general CHY integrands which include higher order poles, algorithms are proposed in two directions. One is to conjecture new rules, and the other is to use the cross-ratio identity method. In this paper, we use the cross-ratio identity approach to re-derive the conjectured integration rules involving higher order poles for several special cases: the single double pole, single triple pole and duplexdouble pole. The equivalence between the present formulas and the previously conjectured ones is discussed for the first two situations.

  19. The higher mode of surface wave derived from ambient noise and preliminary application to estimating subsurface

    NASA Astrophysics Data System (ADS)

    Zhentao, Y.; Xiaofei, C.; Jiannan, W.

    2016-12-01

    The fundamental mode is the primary component of surface wave derived from ambient noise. It is the basis of the method of structure imaging from ambient noise (e.g. SPAC, Aki 1957; F-K, Lascoss 1968; MUSIC, Schmidt 1986). It is well known, however, that if the higher modes of surface wave can be identified from data and are incorporated in the inversion of dispersion curves, the uncertainty in inversion results will be greatly reduced (e.g., Tokimastu,1997). Actually, the ambient noise indeed contains the higher modes as well in its raw data of ambient noise. If we could extract the higher modes from ambient noise, the structure inversion method of ambient noise would be greatly improved. In the past decade, there are many studies to improve SPAC and analyses the relationship of fundamental mode and higher mode (Ohri et al 2002; Asten et al. 2006; Tashiaki Ykoi 2010 ;Tatsunori Ikeda 2012). In this study, we will present a new method of identifying higher modes from ambient noise data by reprocessing the "surface waves' phases" derived from the ambient noise through cross-correlation analysis, and show preliminary application in structure inversion.

  20. Class-Based, Gendered and Racialized Institutions of Higher Education: Everyday Life of Academia from the View of Chicana Faculty.

    ERIC Educational Resources Information Center

    Romero, Mary

    1997-01-01

    Focuses on the daily practices within institutions that shape the professional roles of Chicana scholars and teachers to fulfill specific class, gender, racial, and ethnic expectations held by the dominant majority in higher education. Analysis shows that Chicanas are treated as affirmative action hires and token roles, a view that adversely…

  1. Revitalizing Quality Using Guidance Counseling in Ethiopian Higher Education Institutions: Exploring Students' Views and Attitudes at Haramaya University

    ERIC Educational Resources Information Center

    Seyoum, Yilfashewa

    2011-01-01

    This study attempts to scrutinize how guidance counseling is implemented and its impact in enhancing quality in higher education institutions. The sole purpose of the investigation is to explore students' views and attitudes and how the current practices of guidance counseling contribute to foster excellence of the various university academic…

  2. The Views of Employers on Internships as a Means of Learning from Work Experience in Higher Education

    ERIC Educational Resources Information Center

    Virolainen, Maarit Hannele; Stenstrom, Marja-Leena; Kantola, Mauri

    2011-01-01

    This article examines internships as part of the apprenticeship model of learning adopted in higher education. We focus on employers' views on internships, which have hitherto received only limited attention. Our study explores employers' experiences in organizing internships, and their collaboration with one University of Applied Sciences,…

  3. The Views of Employers on Internships as a Means of Learning from Work Experience in Higher Education

    ERIC Educational Resources Information Center

    Virolainen, Maarit Hannele; Stenstrom, Marja-Leena; Kantola, Mauri

    2011-01-01

    This article examines internships as part of the apprenticeship model of learning adopted in higher education. We focus on employers' views on internships, which have hitherto received only limited attention. Our study explores employers' experiences in organizing internships, and their collaboration with one University of Applied Sciences,…

  4. Two-Loop Gell-Mann Function for General Renormalizable N = 1 Supersymmetric Theory, Regularized by Higher Derivatives

    NASA Astrophysics Data System (ADS)

    Shevtsova, Ekaterina

    2011-10-01

    For the general renormalizable N=1 supersymmetric Yang-Mills theory, regularized by higher covariant derivatives, a two-loop β-function is calculated. It is shown that all integrals, needed for its obtaining are integrals of total derivatives.

  5. Chinese International Students' and Faculty Members' Views of Plagiarism in Higher Education

    ERIC Educational Resources Information Center

    Grigg, Alan

    2016-01-01

    As the enrollment of Chinese international students (CIS) increased at a private institution in the Midwest, so did suspected cases of plagiarism. This study addressed the problem of how faculty members grappled with CIS' interpretation and application of Western-based views of plagiarism. The purpose of the study was to identify similarities and…

  6. Co-Creating Curriculum in Higher Education: Promoting Democratic Values and a Multidimensional View on Learning

    ERIC Educational Resources Information Center

    Bergmark, Ulrika; Westman, Susanne

    2016-01-01

    This paper discusses a case study in teacher education in Sweden, focusing on creating spaces for student engagement through co-creating curriculum. It highlights democratic values and a multidimensional learning view as underpinning such endeavors. The main findings are that co-creating curriculum is an ambiguous process entailing unpredictable,…

  7. Chinese International Students' and Faculty Members' Views of Plagiarism in Higher Education

    ERIC Educational Resources Information Center

    Grigg, Alan

    2016-01-01

    As the enrollment of Chinese international students (CIS) increased at a private institution in the Midwest, so did suspected cases of plagiarism. This study addressed the problem of how faculty members grappled with CIS' interpretation and application of Western-based views of plagiarism. The purpose of the study was to identify similarities and…

  8. Co-Creating Curriculum in Higher Education: Promoting Democratic Values and a Multidimensional View on Learning

    ERIC Educational Resources Information Center

    Bergmark, Ulrika; Westman, Susanne

    2016-01-01

    This paper discusses a case study in teacher education in Sweden, focusing on creating spaces for student engagement through co-creating curriculum. It highlights democratic values and a multidimensional learning view as underpinning such endeavors. The main findings are that co-creating curriculum is an ambiguous process entailing unpredictable,…

  9. Higher Education and the Minerals Boom: A View from the Regions

    ERIC Educational Resources Information Center

    Bell, Philip

    2014-01-01

    This paper examines the impact of the minerals boom to date on the demand for higher education in Central Queensland, and the sustainability of higher education providers in high economic growth environments. Several datasets were used to examine changes in the demand for higher education among specific student groups within the region, the…

  10. Growth and Conflict: The Views of Chinese Private Higher Education Managers

    ERIC Educational Resources Information Center

    Ma, Xiaoying; Abbott, Malcom

    2016-01-01

    Purpose: The purpose of this paper is to report the findings of a series of interviews conducted with a number of managers of Chinese private higher education institutions on the growth of the private higher education sector in China and the relationship it has with the government. Private higher education managers in China do seem concerned with…

  11. On the curious spectrum of duality invariant higher-derivative gravity

    DOE PAGES

    Hohm, Olaf; Naseer, Usman; Zwiebach, Barton

    2016-08-31

    Here, we analyze the spectrum of the exactly duality and gauge invariant higher-derivative double field theory. While this theory is based on a chiral CFT and does not correspond to a standard string theory, our analysis illuminates a number of issues central in string theory. The full quadratic action is rewritten as a two-derivative theory with additional fields. This allows for a simple analysis of the spectrum, which contains two massive spin-2 ghosts and massive scalars, in addition to the massless fields. Moreover, in this formulation, the massless or tensionless limit α' → ∞ is non-singular and leads to anmore » enhanced gauge symmetry. We show that the massive modes can be integrated out exactly at the quadratic level, leading to an infinite series of higher-derivative corrections. Lastly, we present a ghost-free massive extension of linearized double field theory, which employs a novel mass term for the dilaton and metric.« less

  12. Can non-local or higher derivative theories provide alternatives to inflation?

    SciTech Connect

    Geshnizjani, Ghazal; Ahmadi, Nahid E-mail: nahmadi@ut.ac.ir

    2013-11-01

    The standard mechanism for producing the observed scale-invariant power spectrum from adiabatic vacuum fluctuations relies on first order derivative of fields in the action for curvature perturbations. It has been proven [1] that, under this ansatz, any theory of early universe that matches cosmological observations should include a phase of accelerated expansion (i.e. inflation) or it has to break at least one of the following tenets of classical general relativity: Null Energy Conditions (NEC), subluminal signal propagation, or sub-Planckian energy densities. We extend this proof to a large class of theories with higher (spatial) derivative or non-local terms in the action. Interestingly, only theories in the neighborhood of Lifshitz points with ω{sub k}∝k{sup 0} and k{sup 3} remain viable.

  13. Spontaneous breakdown of Lorentz symmetry in scalar QED with higher order derivatives

    SciTech Connect

    Polonyi, Janos; Siwek, Alicja

    2011-10-15

    Scalar QED is studied with higher order derivatives for the scalar-field kinetic energy. A local potential is generated for the gauge field due to the covariant derivatives and the vacuum with nonvanishing expectation value for the scalar field, and the vector potential is constructed in the leading-order saddle-point expansion. This vacuum breaks the global gauge and Lorentz symmetry spontaneously. The unitarity of time evolution is assured in the physical, positive norm subspace, and the linearized equations of motion are calculated. The Goldstone theorem always keeps the radiation field massless. A particular model is constructed where the full set of standard Maxwell equations is recovered on the tree level, thereby relegating the effects of broken Lorentz symmetry to the level of radiative corrections.

  14. Higher Derivative Corrections to Black Hole Thermodynamics from Supersymmetric Matrix Quantum Mechanics

    SciTech Connect

    Hanada, Masanori; Hyakutake, Yoshifumi; Nishimura, Jun; Takeuchi, Shingo

    2009-05-15

    We perform a direct test of the gauge-gravity duality associated with the system of N D0-branes in type IIA superstring theory at finite temperature. Based on the fact that higher derivative corrections to the type IIA supergravity action start at the order of {alpha}{sup '3}, we derive the internal energy in expansion around infinite 't Hooft coupling up to the subleading term with one unknown coefficient. The power of the subleading term is shown to be nicely reproduced by the Monte Carlo data obtained nonperturbatively on the gauge theory side at finite but large effective (dimensionless) 't Hooft coupling constant. This suggests, in particular, that the open strings attached to the D0-branes provide the microscopic origin of the black hole thermodynamics of the dual geometry including {alpha}{sup '} corrections. The coefficient of the subleading term extracted from the fit to the Monte Carlo data provides a prediction for the gravity side.

  15. Higher derivative corrections to black hole thermodynamics from supersymmetric matrix quantum mechanics.

    PubMed

    Hanada, Masanori; Hyakutake, Yoshifumi; Nishimura, Jun; Takeuchi, Shingo

    2009-05-15

    We perform a direct test of the gauge-gravity duality associated with the system of N D0-branes in type IIA superstring theory at finite temperature. Based on the fact that higher derivative corrections to the type IIA supergravity action start at the order of alpha;{'3}, we derive the internal energy in expansion around infinite 't Hooft coupling up to the subleading term with one unknown coefficient. The power of the subleading term is shown to be nicely reproduced by the Monte Carlo data obtained nonperturbatively on the gauge theory side at finite but large effective (dimensionless) 't Hooft coupling constant. This suggests, in particular, that the open strings attached to the D0-branes provide the microscopic origin of the black hole thermodynamics of the dual geometry including alpha;{'} corrections. The coefficient of the subleading term extracted from the fit to the Monte Carlo data provides a prediction for the gravity side.

  16. A comparison of different methods to implement higher order derivatives of density functionals

    SciTech Connect

    van Dam, Hubertus J.J.

    2016-05-18

    Density functional theory is the dominant approach in electronic structure methods today. To calculate properties higher order derivatives of the density functionals are required. These derivatives might be implemented manually,by automatic differentiation, or by symbolic algebra programs. Different authors have cited different reasons for using the particular method of their choice. This paper presents work where all three approaches were used and the strengths and weaknesses of each approach are considered. It is found that all three methods produce code that is suffficiently performanted for practical applications, despite the fact that our symbolic algebra generated code and our automatic differentiation code still have scope for significant optimization. The automatic differentiation approach is the best option for producing readable and maintainable code.

  17. Higher-derivative f(R,□R,T) theories of gravity

    NASA Astrophysics Data System (ADS)

    Houndjo, M. J. S.; Rodrigues, M. E.; Mazhari, N. S.; Momeni, D.; Myrzakulov, R.

    In literature, there is a model of modified gravity in which the matter Lagrangian is coupled to the geometry via trace of the stress-energy-momentum tensor T = Tμμ. This type of modified gravity is denoted f(R,T) in which R is Ricci scalar R = Rμμ. We extend manifestly this model to include the higher derivative term □R. We derived equations of motion (EOM) for the model by starting from the basic variational principle. Later we investigate FLRW cosmology for our model. We show that de Sitter (dS) solution is unstable for a generic type of f(R,□R,T) model. Furthermore we investigate an inflationary scenario based on this model. A graceful exit from inflation is guaranteed in this type of modified gravity.

  18. An economical view of soil conservation. The use of geotextil as a tool to teach on higher education

    NASA Astrophysics Data System (ADS)

    Giménez Morera, Antonio; Cerdà, Artemi

    2010-05-01

    Soil and earth science did not take into account the important of economics to teach on higher education. Economics contribute with a positive view on applied soil and earth science. Only if the soil conservation strategies are feasible from an economic point of view they will be sustainable from an environmental point of view. This paper shows the strategies developed at the Soil Erosion and Degradation Experimental Station of El Teularet-Sierra de Enguera. By means of soil erosion plots and rainfall simulation experiments the students can understand the effect of geotextiles on soil erosion control and soil conservation. The task developed in the field, in the laboratory and in the lectures rooms, the students develop the calculations on how much cost the geotextiles and how much soil is protected. The results show that the students found the way to reach a sustainable soil conservation strategy based on soil science and on economics.

  19. Boson-boson effective nonrelativistic potential for higher-derivative electromagnetic theories in D dimensions

    SciTech Connect

    Accioly, Antonio; Dias, Marco

    2004-11-15

    The problem of computing the effective nonrelativistic potential U{sub D} for the interaction of charged-scalar bosons, within the context of D-dimensional electromagnetism with a cutoff, is reduced to quadratures. It is shown that U{sub 3} cannot bind a pair of identical charged-scalar bosons; nevertheless, numerical calculations indicate that boson-boson bound states do exist in the framework of three-dimensional higher-derivative electromagnetism augmented by a topological Chern-Simons term.

  20. Three-point functions in duality-invariant higher-derivative gravity

    SciTech Connect

    Naseer, Usman; Zwiebach, Barton

    2016-03-21

    Here, doubled α'-geometry is the simplest higher-derivative gravitational theory with exact global duality symmetry. We use the double metric formulation of this theory to compute on-shell three-point functions to all orders in α'. A simple pattern emerges when comparing with the analogous bosonic and heterotic three-point functions. As in these theories, the amplitudes factorize. The theory has no Gauss-Bonnet term, but contains a Riemann-cubed interaction to second order in α'.

  1. Academic Staff Views on External Quality Audit: Post Audit Evaluation in a Private Higher Education College

    ERIC Educational Resources Information Center

    Shah, Mahsood; Nair, Chenicheri Sid; Stanford, Sue-Ann

    2011-01-01

    Governments in many countries have funded independent agencies to undertake quality audits of higher education institutions. Such agencies ensure that universities and other higher education providers have effective systems and processes to assure quality assurance in core and support areas. While external quality audits have been in place for a…

  2. Higher Education in Romania: Evolution and Views from the Business Community.

    ERIC Educational Resources Information Center

    Nicolescu, Luminita

    2003-01-01

    Describes the evolution of higher education in Romania after 1990 and presents the results of a survey concerning the relationship between higher education and the business community in Romania. The survey had as its main objective to analyze the evolution and performance of graduates, from both private and state universities, in the labor market,…

  3. Globalization and Higher Education in Southern California: Views from the Professoriate

    ERIC Educational Resources Information Center

    Weldon, Peter A.; Rexhepi, Jevdet; Chang, ChenWei; Jones, Lauren; Layton, Lucas Arribas; Liu, Amy; McKibben, Susan; Misiaszek, Greg; Olmos, Liliana; Quon, Amy; Torres, Carlos Alberto

    2011-01-01

    In this study, faculty at institutions of higher education in Southern California were surveyed to determine the ways they interpret the effects of globalization dynamics upon their various teaching and research activities. Faculty in the state's three higher education tiers spoke positively about the intellectual benefits to be gained by exposure…

  4. On the cancellation of Newtonian singularities in higher-derivative gravity

    NASA Astrophysics Data System (ADS)

    Giacchini, Breno L.

    2017-03-01

    Recently there has been a growing interest in quantum gravity theories with more than four derivatives, including both their quantum and classical aspects. In this work we extend the recent results concerning the non-singularity of the modified Newtonian potential to the most relevant case in which the propagator has complex poles. The model we consider is Einstein-Hilbert action augmented by curvature-squared higher-derivative terms which contain polynomials on the d'Alembert operator. We show that the classical potential of these theories is a real quantity and it is regular at the origin despite the (complex or real) nature or the multiplicity of the massive poles. The expression for the potential is explicitly derived for some interesting particular cases. Finally, the issue of the mechanism behind the cancellation of the singularity is discussed; specifically we argue that the regularity of the potential can hold even if the number of massive tensor modes and scalar ones is not the same.

  5. Recoding Discourses in Higher Education: Critical Views on Recruiting Materials for Latin@ College Students

    ERIC Educational Resources Information Center

    Johnson, Eric J.; Castrellon, Tammy

    2014-01-01

    R. Stanton-Salazar (1997) suggested that minority students who successfully navigate the contexts of higher education are able to do so by "decoding" the system. Rather than obligating students to decode the system, we contend that institutions should "recode" the information they provide to prospective students from minority…

  6. Institutional View of Part-Time Faculty Management in Higher Education Institutes in China

    ERIC Educational Resources Information Center

    Li, Zhifeng; Jiang, Xiulan; Li, Hongbo

    2007-01-01

    Part-time faculty has become an important labor force in Chinese colleges and universities. The number of them has risen rapidly and its structure varies in different types of higher education institutes (HEIs), which results from integration of the social motivation and the inner motivation of schools' reform. From the institutional point of…

  7. A Customer's View: World-Class Corporate Expectations of Higher Education.

    ERIC Educational Resources Information Center

    Fisher, George M. C.

    1990-01-01

    As higher education improves, it should not become so concerned with numbers that it forgets that employees of the 1990s, to which corporations look for their success, must do more than perform well on tests. Graduates should be creative, receptive, communicative, participating, cooperative, and flexible people who love learning. (MSE)

  8. Student Satisfaction with Portuguese Higher Education Institutions: The View of Different Types of Students

    ERIC Educational Resources Information Center

    Sarrico, Cláudia S.; Rosa, Maria J.

    2014-01-01

    The purpose of this paper is to discuss student satisfaction with Portuguese higher education institutions, and to analyse how this varies for different types of students. A survey instrument was used to collect data on students' perceptions and expectations regarding different aspects of service provision. Based on the gap model of satisfaction,…

  9. Student Satisfaction with Portuguese Higher Education Institutions: The View of Different Types of Students

    ERIC Educational Resources Information Center

    Sarrico, Cláudia S.; Rosa, Maria J.

    2014-01-01

    The purpose of this paper is to discuss student satisfaction with Portuguese higher education institutions, and to analyse how this varies for different types of students. A survey instrument was used to collect data on students' perceptions and expectations regarding different aspects of service provision. Based on the gap model of satisfaction,…

  10. Educational Approaches to Entrepreneurship in Higher Education: A View from the Swedish Horizon

    ERIC Educational Resources Information Center

    Hoppe, Magnus; Westerberg, Mats; Leffler, Eva

    2017-01-01

    Purpose: The purpose of this paper is to present and develop models of educational approaches to entrepreneurship that can provide complementary analytical structures to better study, enact and reflect upon the role of entrepreneurship in higher education. Design/methodology/approach A general framework for entrepreneurship education is developed…

  11. Transforming Marginalised Adult Learners' Views of Themselves: Access to Higher Education Courses in England

    ERIC Educational Resources Information Center

    Busher, Hugh; James, Nalita; Piela, Anna; Palmer, Anna-Marie

    2014-01-01

    Adult learners on Access to Higher Education courses struggled with institutional and social structures to attend their courses, but transformed their identities as learners through them. Although asymmetrical power relationships dominated the intentional learning communities of their courses, their work was facilitated by collaborative cultures…

  12. Disadvantage in Higher Education: A View from the Institutional Careers Service

    ERIC Educational Resources Information Center

    Williams, James

    2007-01-01

    This article explores the principal methods in which higher education careers services around the world are addressing the needs of an increasing proportion of students from disadvantaged backgrounds. This study is based on data drawn from focus groups with students and interviews with key personnel and employers. The research demonstrates that…

  13. The Third-Generation Educational Standards: The View from the Higher Educational Institution

    ERIC Educational Resources Information Center

    Pospelov, A. S.; Kal'nei, S. G.; Oleinik, T. A.

    2011-01-01

    Attempts to reform higher education in Russia are experiencing confusion and contradictions when it comes to establishing outcomes and student competencies. A lack of clarity and unnecessarily complicated agendas are combined with lack of resources and adequately prepared instructors to create a situation of uncertainty. The result will be a…

  14. Quality Research in Higher Education Institutions in Oman: Some Views of Teacher Researchers

    ERIC Educational Resources Information Center

    Al Ajmi, Ahmed Ali Saleh

    2015-01-01

    Academic research remains a prime source of knowledge and innovation for higher education institutions (HEIs) that strive to grow, expand and develop their academic reputations and standards. Yet, research informs teaching practices, shapes social changes and it has financial outcomes for HEIs. Therefore, it is imperative to develop institutional…

  15. Knowledge Transmission and Professional Community in Higher Education: An Anthropological View.

    ERIC Educational Resources Information Center

    Armstrong, Jan

    2001-01-01

    Offers an anthropological perspective by examining the role of knowledge transmission in the maintenance and transformation of professional communities in higher education, exploring the use of the ritual process at academic meetings (such as those of the American Anthropological Association). Emphasizing successful conference rituals, the article…

  16. The Future of Learning: 12 Views on Emerging Trends in Higher Education

    ERIC Educational Resources Information Center

    Flynn, William J.; Vredevoogd, Jeff

    2010-01-01

    In 2009, Herman Miller, Inc., a Zeeland, Michigan-based furniture manufacturer, convened a leadership roundtable intended to identify trends that would affect higher education in the year 2015. Representatives from research universities, state colleges, community colleges, private institutions, and architectural and design firms participated in…

  17. The Sociocultural Needs of International Students in Higher Education: A Comparison of Staff and Student Views

    ERIC Educational Resources Information Center

    Bartram, Brendan

    2007-01-01

    The following article examines the sociocultural needs of higher education students on an international degree programme delivered jointly by a post-1992 university in England and a polytechnic institution in the Netherlands. A brief discussion of relevant literature is followed by a methodological overview, detailing the qualitative research…

  18. Institutional View of Part-Time Faculty Management in Higher Education Institutes in China

    ERIC Educational Resources Information Center

    Li, Zhifeng; Jiang, Xiulan; Li, Hongbo

    2007-01-01

    Part-time faculty has become an important labor force in Chinese colleges and universities. The number of them has risen rapidly and its structure varies in different types of higher education institutes (HEIs), which results from integration of the social motivation and the inner motivation of schools' reform. From the institutional point of…

  19. Assessing Quality and Evaluating Performance in Higher Education: Worlds Apart or Complementary Views?

    ERIC Educational Resources Information Center

    Sarrico, Claudia S.; Rosa, Maria J.; Teixeira, Pedro N.; Cardoso, Margarida F.

    2010-01-01

    This paper reflects on quality assessment and performance evaluation in higher education, namely by analysing the insufficient link between those two aspects. We start by reviewing the current state of the art regarding different processes and mechanisms of quality assessment and performance evaluation and discuss some of the major issues…

  20. The Rural Economy: Implications for Further, Higher and Adult Education. An FEU View.

    ERIC Educational Resources Information Center

    Further Education Unit, London (England).

    This study presents an overview of how the further, higher, and adult education (FHE) system in England should support the rural economy. It is meant to relate to the changing agricultural scene, its diversification, the movement of people, and the well-being of the community. The first seven chapters of the booklet describe the nature of the…

  1. Views on Multilingualism and Internationalisation in Higher Education: Administrative Staff in the Spotlight

    ERIC Educational Resources Information Center

    Llurda, Enric; Cots, Josep M.; Armengol, Lurdes

    2014-01-01

    The key role of administrative staff in the implementation of specific institutional policies at university has often been ignored when analysing policies or attitudes related to higher education. Consequently, little is known about the administrative staff's attitudes and involvement relating to the processes of internationalisation and…

  2. On Reflection: Mature Students' Views of Teaching and Learning on Access to Higher Education Courses

    ERIC Educational Resources Information Center

    Busher, Hugh; James, Nalita; Piela, Anna

    2015-01-01

    Mature students' experiences of learning and teaching on Access to Higher Education course are coloured by their socio-economic backgrounds, their prior experiences of learning and their relationships with their tutors. After giving informed consent, 60 students and 20 tutors across seven colleges in a region of England in 2012-2013 took part in…

  3. Addressing the Basics: Academics' View of the Purpose of Higher Education

    ERIC Educational Resources Information Center

    Watty, Kim

    2006-01-01

    A number of changes have occurred in the higher education sector under the auspices of quality and quality improvement. Much of this change has resulted in a compliance-driven environment (more measures, more meetings, more form-filling and less time for the core activities of teaching and research). It is an environment that seeks to assure all…

  4. Sustainability, Crossdisciplinarity and Higher Education--From an Agronomic Point of View

    ERIC Educational Resources Information Center

    Koutsouris, Alex

    2009-01-01

    Nowadays, there is a growing conviction (at least in rhetoric) that sustainability is an idea whose time has come with education being a critical component in the transition towards a sustainable future. In the field of higher agricultural education, systemic approaches have, among others, triggered a lively dialogue. Topics include the challenge…

  5. The Concept of Public Goods, the State, and Higher Education Finance: A View from the BRICs

    ERIC Educational Resources Information Center

    Carnoy, Martin; Froumin, Isak; Loyalka, Prashant K.; Tilak, Jandhyala B.

    2014-01-01

    Because higher education serves both public and private interests, the way it is conceived and financed is contested politically, appearing in different forms in different societies. What is public and private in education is a political--social construct, subject to various political forces, primarily interpreted through the prism of the state.…

  6. Roles and Responsibilities in Student Learning and Accreditation: Views from the State Higher Education Executive Officers

    ERIC Educational Resources Information Center

    State Higher Education Executive Officers, 2007

    2007-01-01

    The Secretary of Education's Commission on the Future of Higher Education and the subsequent review of federal regulations dealing with accreditation by the U.S. Department of Education have energized a national dialogue on fundamental issues concerning student learning, quality assurance, educational effectiveness, and transfer of credit. We…

  7. The View from Higher Education: Public Universities Respond to Educational Reform.

    ERIC Educational Resources Information Center

    McCormick, Alexander C.; Alt, Martha Naomi; Geis, Sonya

    Public universities' attitudes toward recent educational reforms affecting vocational education were examined through structured telephone interviews of personnel at state higher education agencies or coordinating boards and in the admissions offices of public flagship institutions in 48 states (Colorado and Nevada did not participate). Special…

  8. The Concept of Public Goods, the State, and Higher Education Finance: A View from the BRICs

    ERIC Educational Resources Information Center

    Carnoy, Martin; Froumin, Isak; Loyalka, Prashant K.; Tilak, Jandhyala B.

    2014-01-01

    Because higher education serves both public and private interests, the way it is conceived and financed is contested politically, appearing in different forms in different societies. What is public and private in education is a political--social construct, subject to various political forces, primarily interpreted through the prism of the state.…

  9. Renormalizability, van Dam-Veltman-Zakharov discontinuity, and Newtonian singularity in higher-derivative gravity

    NASA Astrophysics Data System (ADS)

    Myung, Yun Soo

    2017-09-01

    It was proposed that if a higher-derivative gravity is renormalizable it implies necessarily a finite Newtonian potential at the origin, but the reverse of this statement is not true. Here, we show that the reverse is true when taking into account the van Dam-Veltman-Zakharov discontinuity, which states that the theory obtained from the massive one by taking a zero mass limit is not equivalent to the theory obtained in the zero mass case. The surviving degree of freedom in the zero mass limit is an extra scalar that does not affect the light bending angle but affects the Newtonian potential. This asserts that in order to make the singularity cancellation the number of massive ghost and healthy tensors matches with that of massive ghost and healthy scalars.

  10. Deforming the Starobinsky model in ghost-free higher derivative supergravities

    NASA Astrophysics Data System (ADS)

    Diamandis, G. A.; Georgalas, B. C.; Kaskavelis, K.; Lahanas, A. B.; Pavlopoulos, G.

    2017-08-01

    We consider higher derivative supergravities that are dual to ghost-free N =1 supergravity theories in the Einstein frame. The duality is implemented by deforming the Kähler function, and/or the superpotential, to include nonlinear dependences on chiral fields that, in other approaches, play the role of the Lagrange multipliers employed to establish this duality. These models are of the no-scale type, and in the minimal case, they require the presence of four chiral multiplets, with a Kähler potential having the structure of the S U (4 ,1 )/S U (4 )×U (1 ) coset manifold. In the standard N =1 supergravity formulation, these models are described by a multifield scalar potential, featuring Starobinsky-like behavior in particular directions.

  11. Pulse transmission receiver with higher-order time derivative pulse generator

    DOEpatents

    Dress, Jr., William B.; Smith, Stephen F.

    2003-08-12

    Systems and methods for pulse-transmission low-power communication modes are disclosed. A pulse transmission receiver includes: a front-end amplification/processing circuit; a synchronization circuit coupled to the front-end amplification/processing circuit; a clock coupled to the synchronization circuit; a trigger signal generator coupled to the clock; and at least one higher-order time derivative pulse generator coupled to the trigger signal generator. The systems and methods significantly reduce lower-frequency emissions from pulse transmission spread-spectrum communication modes, which reduces potentially harmful interference to existing radio frequency services and users and also simultaneously permit transmission of multiple data bits by utilizing specific pulse shapes.

  12. Canonical quantization of theories with higher derivatives. Quantization of R/sup 2/ gravitation

    SciTech Connect

    Bukhbinder, I.L.; Lyakhovich, S.L.

    1988-02-01

    Ostrogradskii's method for reducing theories with higher derivatives to Hamiltonian form is generalized to make it suitable for application to gauge field theories. A Hamiltonian formalism is constructed for the theory with the Lagrangian L-g(anti ..lambda.. - (1/x/sup 2/)R+aR/sub ..mu..v/R/sup ..mu..v/+bR/sup 2/). The structure of the constraints of this theory is investigated, and it is shown that, depending on the relationship between the parameters anti ..lambda.., x, a, b, five different variants of the theory are possible. In each of them, canonical quantization is performed and a local measure in the functional integral is found. The general form of local measure for an arbitrary boson theory interacting with gravity is established.

  13. Stable bounce and inflation in non-local higher derivative cosmology

    SciTech Connect

    Biswas, Tirthabir; Koshelev, Alexey S.; Mazumdar, Anupam; Vernov, Sergey Yu. E-mail: alexey.koshelev@vub.ac.be E-mail: svernov@theory.sinp.msu.ru

    2012-08-01

    One of the greatest problems of primordial inflation is that the inflationary space-time is past-incomplete. This is mainly because Einstein's GR suffers from a space-like Big Bang singularity. It has recently been shown that ghost-free, non-local higher-derivative ultra-violet modifications of Einstein's gravity may be able to resolve the cosmological Big Bang singularity via a non-singular bounce. Within the framework of such non-local cosmological models, we are going to study both sub- and super-Hubble perturbations around an inflationary trajectory which is preceded by the Big Bounce in the past, and demonstrate that the inflationary trajectory has an ultra-violet completion and that perturbations do not suffer from any pathologies.

  14. Universality in the shape dependence of holographic Rényi entropy for general higher derivative gravity

    NASA Astrophysics Data System (ADS)

    Chu, Chong-Sun; Miao, Rong-Xin

    2016-12-01

    We consider higher derivative gravity and obtain universal relations for the shape coefficients ( f a , f b , f c ) of the shape dependent universal part of the Rényi entropy for four dimensional CFTs in terms of the parameters ( c, t 2 , t 4) of two-point and three-point functions of stress tensors. As a consistency check, these shape coefficients f a and f c satisfy the differential relation as derived previously for the Rényi entropy. Interestingly, these holographic relations also apply to weakly coupled conformal field theories such as theories of free fermions and vectors but are violated by theories of free scalars. The mismatch of f a for scalars has been observed in the literature and is due to certain delicate boundary contributions to the modular Hamiltonian. Interestingly, we find a combination of our holographic relations which are satisfied by all free CFTs including scalars. We conjecture that this combined relation is universal for general CFTs in four dimensional spacetime. Finally, we find there are similar universal laws for holographic Rényi entropy in general dimensions.

  15. Universality of anomalous conductivities in theories with higher-derivative holographic duals

    NASA Astrophysics Data System (ADS)

    Grozdanov, S.; Poovuttikul, N.

    2016-09-01

    Anomalous chiral conductivities in theories with global anomalies are independent of whether they are computed in a weakly coupled quantum (or thermal) field theory, hydrodynamics, or at infinite coupling from holography. While the presence of dynamical gauge fields and mixed, gauge-global anomalies can destroy this universality, in their absence, the non-renormalisation of anomalous Ward identities is expected to be obeyed at all intermediate coupling strengths. In holography, bulk theories with higher-derivative corrections incorporate coupling constant corrections to the boundary theory observables in an expansion around infinite coupling. In this work, we investigate the coupling constant dependence and universality of anomalous conductivities (and thus of the anomalous Ward identities) in general, four-dimensional systems that possess asymptotically anti-de Sitter holographic duals with a non-extremal black brane in five dimensions, and anomalous transport introduced into the boundary theory via the bulk Chern-Simons action. We show that in bulk theories with arbitrary gauge- and diffeomorphism-invariant higher-derivative actions, anomalous conductivities, which can incorporate an infinite series of (inverse) coupling constant corrections, remain universal. Owing to the existence of the membrane paradigm, the proof reduces to a construction of bulk effective theories at the horizon and the boundary. It only requires us to impose the condition of horizon regularity and correct boundary conditions on the fields. We also discuss ways to violate the universality by violating conditions for the validity of the membrane paradigm, in particular, by adding mass to the vector fields (a case with a mixed, gauge-global anomaly) and in bulk geometries with a naked singularity.

  16. RG flow and thermodynamics of causal horizons in higher-derivative AdS gravity

    NASA Astrophysics Data System (ADS)

    Banerjee, Shamik; Bhattacharyya, Arpan

    2016-05-01

    In arXiv:1508.01343 [hep-th], one of the authors proposed that in AdS/CFT the gravity dual of the boundary c-theorem is the second law of thermodynamics satisfied by causal horizons in AdS and this was verified for Einstein gravity in the bulk. In this paper we verify this for higher derivative theories. We pick up theories for which an entropy expression satisfying the second law exists and show that the entropy density evaluated on the causal horizon in a RG flow geometry is a holographic c-function. We also prove that given a theory of gravity described by a local covariant action in the bulk a sufficient condition to ensure holographic c-theorem is that the second law of causal horizon thermodynamics be satisfied by the theory. This allows us to explicitly construct holographic c-function in a theory where there is curvature coupling between gravity and matter and standard null energy condition cannot be defined although second law is known to hold. Based on the duality between c-theorem and the second law of causal horizon thermodynamics proposed in arXiv:1508.01343 [hep-th] and the supporting calculations of this paper we conjecture that every Unitary higher derivative theory of gravity in AdS satisfies the second law of causal horizon thermodynamics. If this is not true then c-theorem will be violated in a unitary Lorentz invariant field theory.

  17. On the Quartic Higher-Derivative Gravitational Terms in the Heterotic Superstring Theory

    NASA Astrophysics Data System (ADS)

    Pollock, M. D.

    The quartic higher-derivative gravitational terms hat { R}4 in the heterotic-superstring effective Lagrangian hat L, defined from the Riemann ten-tensor hat { R}ABCD, are expanded, after reduction to the conformally-flat physical D-space gij, in terms of the Ricci tensor Rij and scalar R. The resulting quadratic term { R}2 ≡ B(R2-Rij Rij) is tachyon-free and agrees exactly with the prediction from global supersymmetry in the nonlinear realization of Volkov and Akulov of the flat-space, quadratic fermionic Lagrangian { T}2 ≡ T2-Tij Tij for a massless Dirac or Weyl spinor, only when D = 4, assuming the Einstein equation Rij -(1)/(2) R gij ≈ κ 2Tij for the energy-momentum tensor. This proves that the heterotic superstring has to be reduced from ten to four dimensions if supersymmetry is to be correctly incorporated into the theory, and it rules out the bosonic string and type-II superstring, for which { R}2 has the different a priori forms ±(R2-4RijRij) derived from hat { R}2, which also contain tachyons (that seem to remain after the inclusion of a further contribution to { R}2 from hat { R}4). The curvature of space-time introduces a mass into the Dirac equation, |m| ˜ √ {|R|}, while quadratic, higher-derivative terms { R}2 make an additional contribution to the Einstein equations, these two effects causing a difference between { R}3 and { R}4 on the one hand, and the predictions from { T}3 and { T}4 on the other. The quartic terms { R}4 still possess some residual symmetry, however, enabling us to estimate the radius-squared of the internal six-dimensional space bar g{μ ν } in units of the Regge slope-parameter α‧ as Br ≈ 1.75, indicating that compactification occurs essentially at the Planck era, due to quantum mechanical processes, when the action evaluated within the causal horizon is Sh 1. This symmetry is also discussed with regard to the zero-action hypothesis. The dimensionality D = 4 of space-time is rederived from the Wheeler

  18. The park-view effect: Residential development is higher at the boundaries of protected areas.

    PubMed

    Brambilla, Mattia; Ronchi, Silvia

    2016-11-01

    Land-use changes in the surrounding of protected areas might compromise their conservation efficacy, and thus the potential attractive effect that protected areas may exert on urban development is particularly concerning. We investigated whether the proximity to protected areas in a region (Lombardy, Italy) with a high density of urban areas and parks may increase the likelihood of residential development. The main change around protected areas was the loss of open areas (mostly due to development processes at the expense of arable land), which was higher in proximity of parks. Changes in residential discontinuous development were significantly and negatively related to proximity to parks, whereas changes in productive developments were unrelated to park proximity. The higher likelihood of residential development in proximity to parks is likely due to the attraction exerted by parks. The severe loss of open areas and increase of residential development around parks heavily impacted on habitat availability for a declining bird species (Alauda arvensis). Conservation policies considering also what happens around protected areas are urgently needed.

  19. Determination of higher carbonyl compounds in used frying fats by HPLC of DNPH derivatives.

    PubMed

    Schulte, Erhard

    2002-03-01

    In current analytical practice, simple methods are required for assessing the quality of a deep-frying fat after some time of use. Therefore, a new procedure was developed for the fast and selective determination of higher carbonyl compounds, i.e., those triglycerides resulting from the oxidation and/or oxidative cleavage of double bonds in unsaturated fatty acids. For analysis, a fat sample is dissolved in a 1-butanol/toluene mixture containing 6-undecanone as an internal standard. Aldehydes and ketones present are allowed to react with 2,4-dinitrophenylhydrazine (DNPH) in acidic solution for at least 1 h at room temperature. The mixture is injected directly onto a reversed phase HPLC column that is eluted with a very steep gradient between methanol and tert-butylmethyl ether (TBME) and is fitted with a UV detector set at 370 nm. In this way, the DNPH derivatives of all higher carbonyl compounds are eluted as one single peak. The result is calculated as milliequivalents of carbonyls per kg of fat (meq kg(-1)). The method takes a minimum of time and reagents and only requires the usual equipment.

  20. Teaching mathematics online in the European Area of Higher Education: an instructor's point of view

    NASA Astrophysics Data System (ADS)

    Juan, Angel A.; Steegmann, Cristina; Huertas, Antonia; Martinez, M. Jesus; Simosa, J.

    2011-03-01

    This article first discusses how information technologies are changing the way knowledge is delivered at universities worldwide. Then, the article reviews some of the most popular learning management systems available today and some of the most useful online resources in the areas of Mathematics and Statistics. After that, some long-term experiences regarding the teaching of online courses in those areas at the Open University of Catalonia are discussed. Finally, the article presents the results of a large-scale survey performed in Spain that aims to reflect instructors' opinions and feelings about potential benefits and challenges of teaching mathematics online, as well as the role of emergent technologies in the context of the European Area of Higher Education. Therefore, this article contributes to the existing literature as an additional reference point, one based on our long-term experience in a large-scale online environment, for discussions involving mathematical e-learning.

  1. Intermolecular electron transfer from naphthalene derivatives in the higher triplet excited states.

    PubMed

    Sakamoto, Masanori; Cai, Xichen; Hara, Michihiro; Fujitsuka, Mamoru; Majima, Tetsuro

    2004-08-11

    Intermolecular electron transfer (ELT) from a series of naphthalene derivatives (NpD) in the higher triplet excited states (T(n)) to carbon tetrachloride (CCl(4)) in Ar-saturated acetonitrile was observed using the two-color two-laser flash photolysis method. The ELT efficiency depended on the driving force of ELT. Since the ELT from the T(n) state occurred competitively with the internal conversion (IC, T(n) --> T(1)) and the triplet energy transfer (ENT), the ELT became apparent only when sufficient free energy change of ELT was attained. On the other hand, ELT from the T(1) state was not observed, although ELT from the T(1) state with sufficiently long lifetime has a slightly exothermic driving force. The fast ELT from the T(n) state and lack of the reactivity of the T(1) state were explained well by the "sticky" dissociative electron-transfer model based on one-electron reductive attachment to CCl(4) leading to the C-Cl bond cleavage.

  2. Exact renormalization of the photino mass in softly broken N = 1 SQED with N f flavors regularized by higher derivatives

    NASA Astrophysics Data System (ADS)

    Nartsev, I. V.; Stepanyantz, K. V.

    2017-04-01

    We consider the softly broken N = 1 supersymmetric electrodynamics, regularized by higher derivatives. For this theory we demonstrate that the renormalization of the photino mass is determined by integrals of double total derivatives in the momentum space in all orders. Consequently, it is possible to derive the NSVZ-like exact relation between the photino mass anomalous dimension and the anomalous dimension of the matter superfields in the rigid theory by direct summation of supergraphs. It is important that both these renormalization group functions are defined in terms of the bare coupling constant, so that the considered NSVZ-like relation is valid independently of the subtraction scheme in the case of using the higher derivative regularization. The factorization of integrals defining the photino mass renormalization into integrals of double total derivatives is verified by an explicit two-loop calculation.

  3. An expansion formula with higher-order derivatives for fractional operators of variable order.

    PubMed

    Almeida, Ricardo; Torres, Delfim F M

    2013-01-01

    We obtain approximation formulas for fractional integrals and derivatives of Riemann-Liouville and Marchaud types with a variable fractional order. The approximations involve integer-order derivatives only. An estimation for the error is given. The efficiency of the approximation method is illustrated with examples. As applications, we show how the obtained results are useful to solve differential equations, and problems of the calculus of variations that depend on fractional derivatives of Marchaud type.

  4. An Expansion Formula with Higher-Order Derivatives for Fractional Operators of Variable Order

    PubMed Central

    Almeida, Ricardo

    2013-01-01

    We obtain approximation formulas for fractional integrals and derivatives of Riemann-Liouville and Marchaud types with a variable fractional order. The approximations involve integer-order derivatives only. An estimation for the error is given. The efficiency of the approximation method is illustrated with examples. As applications, we show how the obtained results are useful to solve differential equations, and problems of the calculus of variations that depend on fractional derivatives of Marchaud type. PMID:24319382

  5. Higher-order derivative correlations and the alignment of small-scale structures in isotropic numerical turbulence

    NASA Technical Reports Server (NTRS)

    Kerr, R. A.

    1983-01-01

    In a three dimensional simulation higher order derivative correlations, including skewness and flatness factors, are calculated for velocity and passive scalar fields and are compared with structures in the flow. The equations are forced to maintain steady state turbulence and collect statistics. It is found that the scalar derivative flatness increases much faster with Reynolds number than the velocity derivative flatness, and the velocity and mixed derivative skewness do not increase with Reynolds number. Separate exponents are found for the various fourth order velocity derivative correlations, with the vorticity flatness exponent the largest. Three dimensional graphics show strong alignment between the vorticity, rate of strain, and scalar-gradient fields. The vorticity is concentrated in tubes with the scalar gradient and the largest principal rate of strain aligned perpendicular to the tubes. Velocity spectra, in Kolmogorov variables, collapse to a single curve and a short minus 5/3 spectral regime is observed.

  6. Recent advances in gossypol derivatives and analogs: a chemistry and biology view.

    PubMed

    Lu, Yuzhi; Li, Jun; Dong, Chun-E; Huang, Jian; Zhou, Hai-Bing; Wang, Wei

    2017-07-01

    Gossypol as a natural occurring polyphenol has been studied in a wide range of therapeutic contexts for a long time. The chemical modifications on gossypol were limited due to the unique chemical properties of polyphenols. The design and synthesis of gossypol derivatives and the exploration of their biological activities are the interest of the synthetic chemists, medicinal chemists and pharmacologists. Thus, the progress of diverse gossypol derivatives and analogs' synthesis, biological activities, mechanism elucidation and drug discovery based on gossypol scaffold is summarized.

  7. iPSC-derived neurons as a higher-throughput readout for autism: promises and pitfalls.

    PubMed

    Prilutsky, Daria; Palmer, Nathan P; Smedemark-Margulies, Niklas; Schlaeger, Thorsten M; Margulies, David M; Kohane, Isaac S

    2014-02-01

    The elucidation of disease etiologies and establishment of robust, scalable, high-throughput screening assays for autism spectrum disorders (ASDs) have been impeded by both inaccessibility of disease-relevant neuronal tissue and the genetic heterogeneity of the disorder. Neuronal cells derived from induced pluripotent stem cells (iPSCs) from autism patients may circumvent these obstacles and serve as relevant cell models. To date, derived cells are characterized and screened by assessing their neuronal phenotypes. These characterizations are often etiology-specific or lack reproducibility and stability. In this review, we present an overview of efforts to study iPSC-derived neurons as a model for autism, and we explore the plausibility of gene expression profiling as a reproducible and stable disease marker.

  8. iPSC-derived neurons as a higher-throughput readout for autism: Promises and pitfalls

    PubMed Central

    Prilutsky, Daria; Palmer, Nathan P.; Smedemark-Margulies, Niklas; Schlaeger, Thorsten M.; Margulies, David M.; Kohane, Isaac S.

    2014-01-01

    The elucidation of disease etiologies and establishment of robust, scalable, high-throughput screening assays for autism spectrum disorders (ASDs) have been impeded by both inaccessibility of disease-relevant neuronal tissue and the genetic heterogeneity of the disorder. Neuronal cells derived from induced pluripotent stem cells (iPSCs) from autism patients may circumvent these obstacles and serve as relevant cell models. To date, derived cells are characterized and screened by assessing their neuronal phenotypes. These characterizations are often etiology-specific or lack reproducibility and stability. In this manuscript, we present an overview of efforts to study iPSC-derived neurons as a model for autism, and we explore the plausibility of gene expression profiling as a reproducible and stable disease marker. PMID:24374161

  9. Higher order treatment on temporal derivative of angular flux for time-dependent MOC

    SciTech Connect

    Tsujita, K.; Endo, T.; Yamamoto, A.; Kamiyama, Y.; Kirimura, K.

    2013-07-01

    A new kinetic analysis method, whose angular dependence of temporal derivative for angular flux is accurately treated within practical memory requirement, is proposed. The method of characteristics (MOC) is being widely used for reactor analysis thanks to the advances of numerical algorithms and computer hardware. However, the computational resources, i.e., the memory capacity, can be still a crucial problem for rigorous kinetic calculations using MOC. In the straightforward approach for kinetic calculation using MOC, the segment-averaged angular fluxes should be stored on the memory in order to explicitly calculate the temporal derivative of the angular flux, which would require huge memory. Thus, in the conventional kinetic calculation code using MOC, the temporal derivative of the angular flux has been approximated as angularly isotropic in order to reduce the memory requirement (isotropic assumption). However, the approximation error caused by the conventional isotropic assumption has not been thoroughly and quantitatively investigated so far and an accurate kinetic calculation method, which can quantitatively estimate the above approximation error within practical memory storage, has not been developed. The present study tries to address this issue with a newly developed approach. Effect of the approximate treatment for the temporal derivative of angular flux is evaluated through benchmark calculations. (authors)

  10. Perspectives on Higher Education: Eight Disciplinary and Comparative Views. Papers presented at the Summer Seminar (University of California, Los Angeles, California 1982).

    ERIC Educational Resources Information Center

    Clark, Burton R., Ed.

    Eight perspectives on higher education are provided in essays based on papers presented at a 1982 seminar. The historical perspective is provided by Harold Perkin with attention to turning points in higher education in Europe, Japan, and the United States. Maurice Kogan considers the political view and specifically intrainstitutional issues, the…

  11. Segregation of some mesh-derived textures evaluated by free viewing.

    PubMed

    Hallett, P E; Hofmann, M I

    1991-01-01

    Beginning with a hexagonal mesh, a family of equiluminous geometric textures can be formed by rotating each line segment by a fixed amount. Such textures vary both in line orientation and in the sizes of the intervening spaces or "holes". In the Fourier domain the textures have the same discrete two-dimensional frequency components but the amplitudes vary. The segregation of texture pairs as figures in grounds has been assessed for free viewing by the ratings of 10 subjects. Line segment orientation information alone cannot explain the results. Linear regression techniques were used to examine the correlation between the subjects' ratings and physical differences between figures and grounds. Significant correlations were found with (a) the amplitudes of the low-frequency Fourier harmonics of the textures and (b) maximum hole size, but not with the third harmonics or line segment orientation. Patterns composed of mirror-image pairs are very poorly discriminated; in these cases line orientation information may be used.

  12. Consistent higher derivative gravitational theories with stable de Sitter and anti-de Sitter backgrounds

    NASA Astrophysics Data System (ADS)

    Biswas, Tirthabir; Koshelev, Alexey S.; Mazumdar, Anupam

    2017-02-01

    In this paper we provide the criteria for any generally covariant, parity preserving, and torsion-free theory of gravity to possess a stable de Sitter (dS) or anti-de Sitter (AdS) background. By stability we mean the absence of tachyonic or ghostlike states in the perturbative spectrum that can lead to classical instabilities and violation of quantum unitarity. While we find that the usual suspects, the F (R ) and F (G ) theories, can indeed possess consistent (A)dS backgrounds, G being the Gauss-Bonnet term, another interesting class of theories, string-inspired infinite derivative gravitational theories, can also be consistent around such curved vacuum solutions. Our study should not only be relevant for quantum gravity and early universe cosmology involving ultraviolet physics, but also for modifications of gravity in the infrared sector vying to replace dark energy.

  13. [Current view on chloroquine derivative treatment from rheumatologist perspective and possible ocular side effects].

    PubMed

    Pawlak-Buś, Katarzyna; Gaca-Wysocka, Magdalena; Grzybowski, Andrzej; Leszczyński, Piotr

    2016-03-01

    Anti-malarial drugs specifically hydroxychloroquine (HCQ) or chloroquine (CQ) are very effective in treating and preventing the symptoms of systemic lupus erythematosus and other connective tissue diseases. These medications have shown to improve joint and muscle pain and arthritis, skin rashes, fatique, fever and also to control systemic signs of lupus as pericarditis or pleuritis. Shortterm and long-term treatment reduce cholesterol and have anti-platelet effect with decreasing risk of cardiovascular disease. The lupus patients on anti-malarials have also lower risk of cumulative organ damage due to reduce the amount of steroids. They may help to decrease lupus flares, mortality and are the key to controlling lupus long term outcome. Some lupus patients should be on anti-malarials for the rest of their life. For this reason, the key question is weather these drugs are absolutely safe and can be long term used in all lupus patients as a background therapy? Potential non-specific side effects occur very rare and are usually minor and last for short period. The major concerns are retinal deposits damage which could be potential reversible especially during hydroxychloroquine treatment. Nevertheless, ophthalmologist examination is still needed before starting to take HCQ or CQ and at to follow-up visits every 6-12 months. In conclusion it seems that anti-malarials are safe and have more clinical benefits than risks and from rheumatologist point of view should be more widely use in all lupus patients.

  14. Synthesis and antimicrobial activities of new higher amino acid Schiff base derivatives of 6-aminopenicillanic acid and 7-aminocephalosporanic acid

    NASA Astrophysics Data System (ADS)

    Özdemir (nee Güngör), Özlem; Gürkan, Perihan; Özçelik, Berrin; Oyardı, Özlem

    2016-02-01

    Novel β-lactam derivatives (1c-3c) (1d-3d) were produced by using 6-aminopenicillanic acid (6-APA), 7-aminocephalosporanic acid (7-ACA) and the higher amino acid Schiff bases. The synthesized compounds were characterized by elemental analysis, IR, 1H/13C NMR and UV-vis spectra. Antibacterial activities of all the higher amino acid Schiff bases (1a-3a) (1b-3b) and β-lactam derivatives were screened against three gram negative bacteria (Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, Acinetobacter baumannii RSKK 02026), three gram positive bacteria (Staphylococcus aureus ATCC 25923, Enterococcus faecalis ATCC 07005, Bacillus subtilis ATCC 6633) and their drug-resistant isolates by using broth microdilution method. Two fungi (Candida albicans and Candida krusei) were used for antifungal activity.

  15. Treating the Einstein-Hilbert action as a higher derivative Lagrangian: revealing the missing information about conformal non-invariance

    NASA Astrophysics Data System (ADS)

    Nikolić, Branislav

    2017-08-01

    The Hamiltonian formulation of conformally invariant Weyl-squared higher derivative theory teaches us that conformal symmetry is expressed through particular first class constraints related to the absence of the three-metric determinant and the trace of the extrinsic curvature from the theory. Any term depending on them which is added to this theory breaks conformal invariance and turns these constraints into second class ones. Such second class constraints are missing in the standard canonical formulation of the conformally non-invariant Einstein-Hilbert theory. It is demonstrated that such constraints do appear if the theory is treated as a higher derivative one: if the extrinsic curvature is promoted to an independent variable, the apparently missing information about conformal behavior is revealed.

  16. Black holes in an asymptotically safe gravity theory with higher derivatives

    SciTech Connect

    Cai, Yi-Fu; Easson, Damien A. E-mail: easson@asu.edu

    2010-09-01

    We present a class of spherically symmetric vacuum solutions to an asymptotically safe theory of gravity containing high-derivative terms. We find quantum corrected Schwarzschild-(anti)-de Sitter solutions with running gravitational coupling parameters. The evolution of the couplings is determined by their corresponding renormalization group flow equations. These black holes exhibit properties of a classical Schwarzschild solution at large length scales. At the center, the metric factor remains smooth but the curvature singularity, while softened by the quantum corrections, persists. The solutions have an outer event horizon and an inner Cauchy horizon which equate when the physical mass decreases to a critical value. Super-extremal solutions with masses below the critical value correspond to naked singularities. The Hawking temperature of the black hole vanishes when the physical mass reaches the critical value. Hence, the black holes in the asymptotically safe gravitational theory never completely evaporate. For appropriate values of the parameters such stable black hole remnants make excellent dark matter candidates.

  17. Deriving Lindblad master equations with Keldysh diagrams: Correlated gain and loss in higher order perturbation theory

    NASA Astrophysics Data System (ADS)

    Müller, Clemens; Stace, Thomas M.

    2017-01-01

    Motivated by correlated decay processes producing gain, loss, and lasing in driven semiconductor quantum dots [Phys. Rev. Lett. 113, 036801 (2014), 10.1103/PhysRevLett.113.036801; Science 347, 285 (2015), 10.1126/science.aaa2501; Phys. Rev. Lett. 114, 196802 (2015), 10.1103/PhysRevLett.114.196802], we develop a theoretical technique by using Keldysh diagrammatic perturbation theory to derive a Lindblad master equation that goes beyond the usual second-order perturbation theory. We demonstrate the method on the driven dissipative Rabi model, including terms up to fourth order in the interaction between the qubit and both the resonator and environment. This results in a large class of Lindblad dissipators and associated rates which go beyond the terms that have previously been proposed to describe similar systems. All of the additional terms contribute to the system behavior at the same order of perturbation theory. We then apply these results to analyze the phonon-assisted steady-state gain of a microwave field driving a double quantum dot in a resonator. We show that resonator gain and loss are substantially affected by dephasing-assisted dissipative processes in the quantum-dot system. These additional processes, which go beyond recently proposed polaronic theories, are in good quantitative agreement with experimental observations.

  18. Do Glioma Patients Derive Any Therapeutic Benefit From Taking a Higher Cumulative Dose of Temozolomide Regimens?

    PubMed Central

    Sun, Hao; Du, Shasha; Liao, Guixiang; Xie, Xiao; Ren, Chen; Yuan, Ya Wei

    2015-01-01

    Abstract Temozolomide (TMZ) is an oral alkylating agent with established effects on the central nervous system of glioblastoma (GBM) patients. Clinical trials have demonstrated a significant impact on overall survival (OS) with TMZ. Ever since, several TMZ regimens have been designed to improve treatment efficacy by increasing the cumulative dose per cycle. We report a meta-analysis to systematically evaluate different treatment schedules of TMZ in GBM patients. All searches that were conducted in the Cochrane library, Science Direct, and PubMed Databases, and 3 randomized controlled trials (1141 patients) were included. OS and progression-free survival (PFS) were the primary outcomes to be pooled. Unexpectedly, this analysis did not reveal any OS or PFS advantage for the high cumulative dose (HCD) regimen compared with the normal cumulative dose regimen (1141 total patients; hazard ratio [HR] 1.07, 95% CI 0.94–1.22, P = 0.31). Then after analyzing the characteristics of the results from each trial, we found that the regimen with a higher peak concentration during a short-term period (daily doses ≥150 mg/m2/d within ≤7 days/cycle) always had a more superior clinical benefit. So we generated a new pooled HR of 1.10 with a 95% CI of 0.96–1.25 (P = 0.17), which prefers the high peak concentration schedule even without a significant difference. The adverse outcome also indicates a significant increased risk of leukopenia (risk ratio 1.59, 95% CI 1.03–2.46, P = 0.04) among the HCD group. Our study suggests that increasing the cumulative dose per cycle is not an ideal way to improve the efficacy of TMZ, and it will lead to increased risk for leukopenia. Future trials should be designed to examine schedules of higher peak concentration rather than the cumulative dose per cycle. PMID:25997057

  19. First "charosphere" view towards the transport and transformation of Cd with addition of manure derived biochar.

    PubMed

    Wang, Lu; Meng, Jun; Li, Zhangtao; Liu, Xingmei; Xia, Fang; Xu, Jianming

    2017-08-01

    The specific area between biochar and soil surfaces is termed the "charosphere", which is analogous to the rhizosphere between plant roots and soil. Physicochemical properties of charosphere soil differ from natural soil. A double-layer mesh bag experiment was conducted to separate the charosphere soil (>2 mm) from biochar (derived from manure pyrolyzed at 300, 500, 700 °C) and the bulk soil. A 95-day experiment determined the availability, total concentration and speciation of Cd in charosphere soil and the total and available Cd in biochar. The availability of Cd decreased in the charosphere soils. Total Cd concentration increased in the biochars but decreased in charosphere soil, suggesting that Cd might transfer from charosphere soil to biochar. Cd in the acid soluble fraction decreased by 25-40% in different biochars while it increased in residue fraction, indicating that Cd tends to be more stable in charosphere soil. Instrumental analysis using SEM, FTIR were performed to provide further evidence of the transport of Cd and to enable interpretation of the mechanisms involved. The phenomena that Cd concentrations change markedly in the charosphere inspires a novel research perspective towards the study of transport and transformation of heavy metals in soil after biochar application. Copyright © 2017 Elsevier Ltd. All rights reserved.

  20. Building Possible Eastern European Higher Education Linkages: A View into Eastern European Higher Education Systems during the Transition Period--The Example of the Ukraine

    ERIC Educational Resources Information Center

    Skliarenko, Elena

    2004-01-01

    This paper provides a perspective on post-secondary education systems in the countries of the former USSR with the objective of building potential linkages for North American Colleges with the higher education institutions in Eastern Europe. (Contains 3 tables.)

  1. CD73+ adipose-derived mesenchymal stem cells possess higher potential to differentiate into cardiomyocytes in vitro.

    PubMed

    Li, Qiong; Qi, Li-Jie; Guo, Zhi-Kun; Li, He; Zuo, Hong-Bo; Li, Na-Na

    2013-08-01

    Adipose-derived mesenchymal stem cells (ADMSCs) are an attractive adult-derived stem cell population for cardiovascular repair. ADMSCs are heterogeneous cell populations with pluripotent capacity to differentiate into different types of cells. In the present study, we investigated the biological characteristics and differentiation potential of CD73-positive (CD73(+)) and CD73-negative (CD73(-)) ADMSCs. Our results show that in terms of morphological shape, CD73(+)-ADMSCs are mainly small-sized cells, whereas CD73(-)-ADMSCs are big-sized cells; both subpopulations can equally differentiate into adipocytes and osteoblasts in vitro. However, the CD73(+)-ADMSCs possess a higher potential to differentiate into cardiomyocytes than the CD73(-)-ADMSCs. The expression of the cardiac-specific genes, cTnT, Gata4, and Nkx2.5, is much higher in the CD73(+)-ADMSCs than in the CD73(-)-ADMSCs. Furthermore, Nanog expression at both the mRNA and protein levels is significantly higher in CD73(+)-ADMSCs than in CD73(-)-ADMSCs, suggesting that CD73(+)-ADMSCs are an undifferentiated subpopulation that can differentiate into cardiomyocytes in vitro more efficiently. Therefore, this study facilitates a better understanding of the differentiation of the ADMSCs subgroups and attempts to identify if CD73 is a useful marker for sorting and purifying the subpopulation of ADMSCs with a higher capacity for differentiation into cardiomyocytes.

  2. Three-loop NSVZ relation for terms quartic in the Yukawa couplings with the higher covariant derivative regularization

    NASA Astrophysics Data System (ADS)

    Shakhmanov, V. Yu.; Stepanyantz, K. V.

    2017-07-01

    We demonstrate that in non-Abelian N = 1 supersymmetric gauge theories the NSVZ relation is valid for terms quartic in the Yukawa couplings independently of the subtraction scheme if the renormalization group functions are defined in terms of the bare couplings and the theory is regularized by higher covariant derivatives. The terms quartic in the Yukawa couplings appear in the three-loop β-function and in the two-loop anomalous dimension of the matter superfields. We have obtained that the three-loop contribution to the β-function quartic in the Yukawa couplings is given by an integral of double total derivatives. Consequently, one of the loop integrals can be taken and the three-loop contribution to the β-function is reduced to the two-loop contribution to the anomalous dimension. The remaining loop integrals have been calculated for the simplest form of the higher derivative regularizing term. Then we construct the renormalization group functions defined in terms of the renormalized couplings. In the considered approximation they do not satisfy the NSVZ relation for a general renormalization prescription. However, we verify that the recently proposed boundary conditions defining the NSVZ scheme in the non-Abelian case really lead to the NSVZ relation between the terms of the considered structure.

  3. Higher-order derivative correlations and the alignment of small-scale structures in isotropic numerical turbulence

    NASA Technical Reports Server (NTRS)

    Kerr, R. M.

    1985-01-01

    The classical approach to the investigation of small-scale intermittency in turbulence is based on the higher-order derivative correlations such as skewness and flatness factors. In the study of the small scales, numerial simulations can provide more detail than experiments. In the present paper, a variety of velocity- and scalar-derivative correlations are calculated over a range of Reynolds numbers. Particular attention is given to third- and fourth-order correlations, taking into account also some fifth- and sixth-order correlations to allow comparisons with the phenomenological models. The governing equations are the incompresssible Navier-Stokes equation for the velocity and transport equation for a passive scalar. Two numerical codes are used for the simulations presented. Attention is given to details regarding the numerical method used, forcing, simulation parameters, spectra and skewnesses, and graphics.

  4. Higher Education in the News: A Look into the Topics, Sources, and Views of the Print Media.

    ERIC Educational Resources Information Center

    Devitt, James

    This study examined how higher education is represented in the press by analyzing how four leading newspapers, "The New York Times,""USA Today,""The Washington Post," and "The Wall Street Journal," covered higher education in 1997. The study analyzed a total of 610 higher education stories covering 21…

  5. Diversity, Democracy, and Higher Education: A View from Three Nations--India, South Africa, the United States.

    ERIC Educational Resources Information Center

    Beckham, Edgar F., Ed.

    This publication includes six essays that were presented at the first of three tri-national seminars on diversity issues in higher education. The seminars brought together representatives and observers of higher education from India, South Africa, and the United States to explore the role of higher education in promoting understanding of human…

  6. Higher Education in the News: A Look into the Topics, Sources, and Views of the Print Media.

    ERIC Educational Resources Information Center

    Devitt, James

    This study examined how higher education is represented in the press by analyzing how four leading newspapers, "The New York Times,""USA Today,""The Washington Post," and "The Wall Street Journal," covered higher education in 1997. The study analyzed a total of 610 higher education stories covering 21…

  7. Design of Fuzzy Functional Observer-Controller via Higher Order Derivatives of Lyapunov Function for Nonlinear Systems.

    PubMed

    Liu, Chuang; Lam, Hak-Keung; Fernando, Tyrone; Iu, Herbert Ho-Ching

    2016-05-02

    In this paper, we investigate the stability of Takagi-Sugeno fuzzy-model-based (FMB) functional observer-control system. When system states are not measurable for state-feedback control, a fuzzy functional observer is designed to directly estimate the control input instead of the system states. Although the fuzzy functional observer can reduce the order of the observer, it leads to a number of observer gains to be determined. Therefore, a new form of fuzzy functional observer is proposed to facilitate the stability analysis such that the observer gains can be numerically obtained and the stability can be guaranteed simultaneously. The proposed form is also in favor of applying separation principle to separately design the fuzzy controller and the fuzzy functional observer. To design the fuzzy controller with the consideration of system stability, higher order derivatives of Lyapunov function (HODLF) are employed to reduce the conservativeness of stability conditions. The HODLF generalizes the commonly used first-order derivative. By exploiting the properties of membership functions and the dynamics of the FMB control system, convex and relaxed stability conditions can be derived. Simulation examples are provided to show the relaxation of the proposed stability conditions and the feasibility of designed fuzzy functional observer-controller.

  8. Design of Fuzzy Functional Observer-Controller via Higher Order Derivatives of Lyapunov Function for Nonlinear Systems.

    PubMed

    Liu, Chuang; Lam, Hak-Keung; Fernando, Tyrone; Iu, Herbert Ho-Ching

    2016-05-02

    In this paper, we investigate the stability of Takagi-Sugeno fuzzy-model-based (FMB) functional observer-control system. When system states are not measurable for state-feedback control, a fuzzy functional observer is designed to directly estimate the control input instead of the system states. Although the fuzzy functional observer can reduce the order of the observer, it leads to a number of observer gains to be determined. Therefore, a new form of fuzzy functional observer is proposed to facilitate the stability analysis such that the observer gains can be numerically obtained and the stability can be guaranteed simultaneously. The proposed form is also in favor of applying separation principle to separately design the fuzzy controller and the fuzzy functional observer. To design the fuzzy controller with the consideration of system stability, higher order derivatives of Lyapunov function (HODLF) are employed to reduce the conservativeness of stability conditions. The HODLF generalizes the commonly used first-order derivative. By exploiting the properties of membership functions and the dynamics of the FMB control system, convex and relaxed stability conditions can be derived. Simulation examples are provided to show the relaxation of the proposed stability conditions and the feasibility of designed fuzzy functional observer-controller.

  9. Higher Education-to-Work Transitions in the Knowledge Society: The Initial Transition and Positional Competition Point of View

    ERIC Educational Resources Information Center

    Lindberg, Matti

    2008-01-01

    This article presents an analysis of the higher education-to-work transition from the perspective of the competition for job positions between students and degree holders. The conceptual framework used addresses two factors influencing the success of policies that aim to support higher education-to-work transition of youth in a knowledge society:…

  10. Representation and Student Engagement in Higher Education: A Reflection on the Views and Experiences of Course Representatives

    ERIC Educational Resources Information Center

    Carey, Philip

    2013-01-01

    Student engagement is increasingly part of higher education rhetoric. It is seen as a means for universities to understand and enhance the student experience. This has been prompted by a number of potentially conflicting factors. These include growing consumerism in higher education, the rise of user involvement and the notion of students as…

  11. Representation and Student Engagement in Higher Education: A Reflection on the Views and Experiences of Course Representatives

    ERIC Educational Resources Information Center

    Carey, Philip

    2013-01-01

    Student engagement is increasingly part of higher education rhetoric. It is seen as a means for universities to understand and enhance the student experience. This has been prompted by a number of potentially conflicting factors. These include growing consumerism in higher education, the rise of user involvement and the notion of students as…

  12. Primitive versus derived traits in the developmental program of the vertebrate head: views from cyclostome developmental studies.

    PubMed

    Kuratani, Shigeru; Ota, Kinya G

    2008-06-15

    Evolution can be viewed as a series of changes in the developmental program along the phylogenetic tree. To better understand the early evolution of the vertebrate skull, we can use the embryos of the cyclostome species as models. By comparing the cyclostome developmental patterns with those of gnathostomes, it becomes possible to distinguish the primitive and derived parts of the developmental program as taxon-specific traits. These traits are often recognizable as developmental constraints that define taxa by biasing the developmental trajectories within a certain limited range, resulting in morphological homologies in adults. These developmental constraints are distributed on the phylogenetic tree like the morphological character states of adult animals and are associated with specific regions of the tree. From this perspective, we emphasize the importance of considering gene expression and embryonic anatomy as the mechanistic bases that can result in homologous or nonhomologous morphological patterns at later developmental stages. Taking the acquisition of the jaw and trabecula cranii as examples, we demonstrate that a set of embryonic features can be coupled or decoupled during evolution and development. When they are coupled, they exert an ancestral developmental constraint that results in homologous morphological patterns, and when they are decoupled, the ancestral constraints tend to be abandoned, generating a new body plan. The heterotopy behind the specification of the oral domain is an example of decoupling, based on shifted tissue interactions. We also stress the importance of "developmental burden" in determining the sequential order of changes through evolution. (c) 2007 Wiley-Liss, Inc.

  13. How we view competitions between the converging Internet social platforms: Does higher user number mean the final victory?

    NASA Astrophysics Data System (ADS)

    Fu, Tao; Li, Chenguang; Guo, Liping; Wang, Yanni

    2015-12-01

    We propose a special opinion model on Internet users' social platform selections where users only view those converging platforms as tools to maintain their communications with all of their friends or partners and one may use more than one platform at the same time. We construct the time evolution differential equations, seek the fixed points, and study their attractability and repellency by analyzing those equations. Then, we verify the analytical results and observe their accuracy by numerical simulation. The conclusion shows that in any practical system described by our model, one platform will completely eliminate its competitor sooner or later, and when the average degree of the interaction network is relatively low, the laggard may have more chance to turn the tide, but when that average degree is high, that chance is extremely limited.

  14. Aldehyde dehydrogenase activity identifies a subpopulation of canine adipose-derived stem cells with higher differentiation potential.

    PubMed

    Itoh, Harumichi; Nishikawa, Shimpei; Haraguchi, Tomoya; Arikawa, Yu; Hiyama, Masato; Eto, Shotaro; Iseri, Toshie; Itoh, Yoshiki; Tani, Kenji; Nakaichi, Munekazu; Taura, Yasuho; Itamoto, Kazuhito

    2017-09-12

    Adipose-derived stem cells (ADSCs) are abundant and readily obtained, and have been studied for their clinical applicability in regenerative medicine. Some surface antigens have been identified as markers of different ADSC subpopulations in mice and humans. However, it is unclear whether functionally distinct subpopulations exist in dogs. To address this issue, we evaluated aldehyde dehydrogenase (ALDH) activity-a widely used stem cell marker in mice and humans-by flow cytometry. Approximately 20% of bulk ADSCs showed high ALDH activity. Compared to cells with low activity (ALDH(Lo)), the high-activity (ALDH(Hi)) subpopulation exhibited a higher capacity for adipogenic and osteogenic differentiation. This is the first report of distinct ADSC subpopulations in dogs that differ in terms of adipogenic and osteogenic differentiation potential.

  15. The Crisis in Higher Education: The Views of Academic Professionals on Policy, Leadership Values and Operational Practices

    ERIC Educational Resources Information Center

    McNay, Ian

    2008-01-01

    There is a perception of crisis in UK higher education, particularly in England. This article identifies elements of the perceived crisis, quantifies the depth of the crisis from the perceptions of a sample of nearly 300 academic staff, and exemplifies the gap between stated policy and the realities of delivery. Comparisons are made between…

  16. Teaching Staff's Views about the Internationalisation of Higher Education: The Case of Two Bilingual Communities in Spain

    ERIC Educational Resources Information Center

    Lasagabaster, David; Cots, Josep M.; Mancho-Barés, Guzman

    2013-01-01

    The process of internationalisation of higher education can be seen as fluctuating between two main discourses: economic competition and academic internationalisation (Bolsman & Miller 2008). Within the former type of discourse, internationalisation is constructed as a means to generate income, in competition with other institutions, through…

  17. The High School Students' Views on the Necessity of Private Courses for Accessing Higher Education (Siirt Sample)

    ERIC Educational Resources Information Center

    Cevdet, Epcacan

    2015-01-01

    The aim of this research is to determine high school students' opinions regarding the necessity of private courses in the transition to higher education. For this purpose, the descriptive research method has been applied. As a data collection tool, an interview which has both quantitative and qualitative structure in other words a hybrid structure…

  18. The High School Students' Views on the Necessity of Private Courses for Accessing Higher Education (Siirt Sample)

    ERIC Educational Resources Information Center

    Cevdet, Epcacan

    2015-01-01

    The aim of this research is to determine high school students' opinions regarding the necessity of private courses in the transition to higher education. For this purpose, the descriptive research method has been applied. As a data collection tool, an interview which has both quantitative and qualitative structure in other words a hybrid structure…

  19. The Educational Technology Centre: A Window to View the Progress of Chinese ICT-Based Higher Education

    ERIC Educational Resources Information Center

    Zhou, Rong; Xie, Baizhi

    2010-01-01

    In China, after many years, the current status and challenges of e-learning development in higher education have been gradually understood. The educational technology centre (ECT) serves as the key unit to promote e-learning initiatives, but the performance of some centres still trails their foreign counterparts. Under such conditions, the project…

  20. Teaching Staff's Views about the Internationalisation of Higher Education: The Case of Two Bilingual Communities in Spain

    ERIC Educational Resources Information Center

    Lasagabaster, David; Cots, Josep M.; Mancho-Barés, Guzman

    2013-01-01

    The process of internationalisation of higher education can be seen as fluctuating between two main discourses: economic competition and academic internationalisation (Bolsman & Miller 2008). Within the former type of discourse, internationalisation is constructed as a means to generate income, in competition with other institutions, through…

  1. Graduate Views on Access to Higher Education: Is It Really a Case of Pulling up the Ladder?

    ERIC Educational Resources Information Center

    Webb, Rob; Watson, Duncan; Cook, Steve; Arico, Fabio

    2017-01-01

    Using as a starting point in the recent work of Mountford-Zimdars et al., the authors analyse attitudes towards expanding higher education (HE) opportunities in the UK. The authors propose that the approach of Mountford-Zimdars et al. is flawed not only in its adoption of a multivariate logistic regression but also in its interpretation of…

  2. New Higher Education President Integration: Change and Resistance Viewed through Social Power Bases and a Change Model Lens

    ERIC Educational Resources Information Center

    Gearin, Christopher A.

    2017-01-01

    This study investigates how new presidents of higher education institutions struggle to understand their organisations, paying special attention to campus resistance, and how new presidents manage institutional dynamics and expectations. A qualitative study using a phenomenological approach is conducted with 11 single-campus presidents of…

  3. Achievements and Consequences of Two Decades of Quality Assurance in Higher Education: A Personal View from the Edge

    ERIC Educational Resources Information Center

    Houston, Don

    2010-01-01

    While the past two decades have seen significant expansion and harmonisation of quality assurance mechanisms in higher education, there is limited evidence of positive effects on the quality of core processes of teaching and learning. The paradox of the separation of assurance from improvement is explored. A shift in focus from surveillance to…

  4. The Educational Technology Centre: A Window to View the Progress of Chinese ICT-Based Higher Education

    ERIC Educational Resources Information Center

    Zhou, Rong; Xie, Baizhi

    2010-01-01

    In China, after many years, the current status and challenges of e-learning development in higher education have been gradually understood. The educational technology centre (ECT) serves as the key unit to promote e-learning initiatives, but the performance of some centres still trails their foreign counterparts. Under such conditions, the project…

  5. Achievements and Consequences of Two Decades of Quality Assurance in Higher Education: A Personal View from the Edge

    ERIC Educational Resources Information Center

    Houston, Don

    2010-01-01

    While the past two decades have seen significant expansion and harmonisation of quality assurance mechanisms in higher education, there is limited evidence of positive effects on the quality of core processes of teaching and learning. The paradox of the separation of assurance from improvement is explored. A shift in focus from surveillance to…

  6. Higher Education System and the "Open" Knowledge Transfer: A View from Perception of Senior Managers at University Knowledge Transfer Offices

    ERIC Educational Resources Information Center

    Sharifi, Hossein; Liu, Weisheng; Ismail, Hossam S.

    2014-01-01

    Higher education institutions (HEIs) have become increasingly entrepreneurial. Such a shift is highly dependent on the managers of university knowledge transfer offices whose perceptions can be critical in this transformation. This study examines such senior managers' perceptions concerning the "open" paradigm in relation with the…

  7. A View from the Inside: Minority Access & Success in Higher Education. Report of the Select Seminar on Excellence in Education.

    ERIC Educational Resources Information Center

    State Univ. of New York, Albany. School of Education.

    The report summarizes a series of four seminars in 1995 in which educators in the Albany, New York area gathered to discuss intervention to support the access and success of minority students in higher education. Participants included college, university, high school, community, and association leaders and representatives: a list is provided.…

  8. An Emerging View on Accountability in American Higher Education. Research & Occasional Paper Series: CSHE.8.05

    ERIC Educational Resources Information Center

    Leveille, David E.

    2005-01-01

    Higher education has become the focus of increased public debate. Stewardship of public resources, student achievement or the lack thereof, relationships and "partnerships" with business and industry in the area of research, substantial increases in tuition and fees, public perception of wrong-doing in the quality of programs, and allegations of…

  9. The Prevailing Practices and Challenges of Curriculum Reform in Ethiopian Higher Education: Views and Responses from Within

    ERIC Educational Resources Information Center

    Jimma, Tefera T.; Tarekegn, Wudu Melese

    2016-01-01

    In reflecting on the recent educational change in Ethiopian higher education (HE), this article explores the nature of undergraduate curriculum reform in relation to student-centered pedagogy and continuous assessment method. To this end, the article uses a qualitative case study design collecting primary data from interviews with 4 senior…

  10. Higher Education System and the "Open" Knowledge Transfer: A View from Perception of Senior Managers at University Knowledge Transfer Offices

    ERIC Educational Resources Information Center

    Sharifi, Hossein; Liu, Weisheng; Ismail, Hossam S.

    2014-01-01

    Higher education institutions (HEIs) have become increasingly entrepreneurial. Such a shift is highly dependent on the managers of university knowledge transfer offices whose perceptions can be critical in this transformation. This study examines such senior managers' perceptions concerning the "open" paradigm in relation with the…

  11. Graduate Views on Access to Higher Education: Is It Really a Case of Pulling up the Ladder?

    ERIC Educational Resources Information Center

    Webb, Rob; Watson, Duncan; Cook, Steve; Arico, Fabio

    2017-01-01

    Using as a starting point in the recent work of Mountford-Zimdars et al., the authors analyse attitudes towards expanding higher education (HE) opportunities in the UK. The authors propose that the approach of Mountford-Zimdars et al. is flawed not only in its adoption of a multivariate logistic regression but also in its interpretation of…

  12. The Crisis in Higher Education: The Views of Academic Professionals on Policy, Leadership Values and Operational Practices

    ERIC Educational Resources Information Center

    McNay, Ian

    2008-01-01

    There is a perception of crisis in UK higher education, particularly in England. This article identifies elements of the perceived crisis, quantifies the depth of the crisis from the perceptions of a sample of nearly 300 academic staff, and exemplifies the gap between stated policy and the realities of delivery. Comparisons are made between…

  13. Atomic view of the histidine environment stabilizing higher-pH conformations of pH-dependent proteins.

    PubMed

    Valéry, Céline; Deville-Foillard, Stéphanie; Lefebvre, Christelle; Taberner, Nuria; Legrand, Pierre; Meneau, Florian; Meriadec, Cristelle; Delvaux, Camille; Bizien, Thomas; Kasotakis, Emmanouil; Lopez-Iglesias, Carmen; Gall, Andrew; Bressanelli, Stéphane; Le Du, Marie-Hélène; Paternostre, Maïté; Artzner, Franck

    2015-07-20

    External stimuli are powerful tools that naturally control protein assemblies and functions. For example, during viral entry and exit changes in pH are known to trigger large protein conformational changes. However, the molecular features stabilizing the higher pH structures remain unclear. Here we elucidate the conformational change of a self-assembling peptide that forms either small or large nanotubes dependent on the pH. The sub-angstrom high-pH peptide structure reveals a globular conformation stabilized through a strong histidine-serine H-bond and a tight histidine-aromatic packing. Lowering the pH induces histidine protonation, disrupts these interactions and triggers a large change to an extended β-sheet-based conformation. Re-visiting available structures of proteins with pH-dependent conformations reveals both histidine-containing aromatic pockets and histidine-serine proximity as key motifs in higher pH structures. The mechanism discovered in this study may thus be generally used by pH-dependent proteins and opens new prospects in the field of nanomaterials.

  14. Atomic view of the histidine environment stabilizing higher-pH conformations of pH-dependent proteins

    PubMed Central

    Valéry, Céline; Deville-Foillard, Stéphanie; Lefebvre, Christelle; Taberner, Nuria; Legrand, Pierre; Meneau, Florian; Meriadec, Cristelle; Delvaux, Camille; Bizien, Thomas; Kasotakis, Emmanouil; Lopez-Iglesias, Carmen; Gall, Andrew; Bressanelli, Stéphane; Le Du, Marie-Hélène; Paternostre, Maïté; Artzner, Franck

    2015-01-01

    External stimuli are powerful tools that naturally control protein assemblies and functions. For example, during viral entry and exit changes in pH are known to trigger large protein conformational changes. However, the molecular features stabilizing the higher pH structures remain unclear. Here we elucidate the conformational change of a self-assembling peptide that forms either small or large nanotubes dependent on the pH. The sub-angstrom high-pH peptide structure reveals a globular conformation stabilized through a strong histidine-serine H-bond and a tight histidine-aromatic packing. Lowering the pH induces histidine protonation, disrupts these interactions and triggers a large change to an extended β-sheet-based conformation. Re-visiting available structures of proteins with pH-dependent conformations reveals both histidine-containing aromatic pockets and histidine-serine proximity as key motifs in higher pH structures. The mechanism discovered in this study may thus be generally used by pH-dependent proteins and opens new prospects in the field of nanomaterials. PMID:26190377

  15. Higher levels of brain derived neurotrophic factor but similar nerve growth factor in human milk in women with preeclampsia.

    PubMed

    Dangat, Kamini; Kilari, Anitha; Mehendale, Savita; Lalwani, Sanjay; Joshi, Sadhana

    2013-05-01

    Children born to mothers with preeclampsia have consistently been suggested to be at risk for cognitive and behavioral disorders in later life. Breastfeeding is said to be associated with better neurodevelopment outcomes. Our earlier studies indicated higher levels of docosahexaenoic acid (DHA) in human milk in women with preeclampsia. DHA is known to regulate the expression of neurotrophins and together they play a vital role in neurodevelopment and cognitive performance. The present study examines the levels of maternal plasma and milk neurotrophins [(nerve growth factor (NGF) and brain derived neurotrophic factor (BDNF)] in women with preeclampsia and compares them with normotensive women who served as controls. Singleton pregnant women diagnosed with preeclampsia (n=72) and controls (n=102) were recruited for this study from Bharati Hospital, Pune. Plasma and milk samples were analyzed for NGF and BDNF levels using the Emax Immuno Assay System using promega kits. Maternal plasma NGF and BDNF levels were lower (p<0.01 for both) in women with preeclampsia as compared to the control women. Milk NGF levels were similar while milk BDNF levels were higher (p<0.05) in the preeclampsia group as compared to controls. Plasma NGF levels were positively correlated with milk NGF levels in the control group. Our results indicate the differential regulation of milk NGF and BDNF levels in women with preeclampsia. The present study suggests a role for both NGF and BDNF in human milk for postnatal brain development. Further studies need to examine the associations of DHA and BDNF in human milk with cognition at later ages.

  16. Thermodynamics of the Maxwell-Gauss-Bonnet anti-de Sitter black hole with higher derivative gauge corrections

    NASA Astrophysics Data System (ADS)

    Anninos, Dionysios; Pastras, Georgios

    2009-07-01

    The local and global thermal phase structure for asymptotically anti-de Sitter black holes charged under an abelian gauge group, with both Gauss-Bonnet and quartic field strength corrections, is mapped out for all parameter space. We work in the grand canonical ensemble where the external electric potential is held fixed. The analysis is performed in an arbitrary number of dimensions, for all three possible horizon topologies — spherical, flat or hyperbolic. For spherical horizons, new metastable configurations are exhibited both for the pure Gauss-Bonnet theory as well as the pure higher derivative gauge theory and combinations thereof. In the pure Gauss-Bonnet theory with negative coefficient and five or more spatial dimensions, two locally thermally stable black hole solutions are found for a given temperature. Either one or both of them may be thermally favored over the anti-de Sitter vacuum — corresponding to a single or a double decay channel for the metastable black hole. Similar metastable configurations are uncovered for the theory with pure quartic field strength corrections, as well combinations of the two types of corrections, in three or more spatial dimensions. Finally, a secondary Hawking-Page transition between the smaller thermally favored black hole and thermal anti-de Sitter space is observed when both corrections are turned on and their couplings are both positive.

  17. Dietary marine-derived tocopherol has a higher biological availability in mice relative to alpha-tocopherol.

    PubMed

    Gotoh, Naohiro; Watanabe, Hiroyuki; Oka, Tomiko; Mashimo, Daisuke; Noguchi, Noriko; Hata, Kazuhiko; Wada, Shun

    2009-02-01

    The biologic availability of two kinds of tocomonoenols, marine-derived tocopherol (MDT) and alpha-tocomonoenol, was investigated in ICR mice. Vitamin E-deficient ICR mice were fed MDT and alpha-tocomonoenol together with alpha-tocopherol, beta-tocopherol, gamma-tocopherol, and delta-tocopherol, and storage in liver, spleen, lung, and brain was quantified using reverse-phase high-performance liquid chromatography. The vitamin E relative biologic availability (VE-RBA) in liver was 100 for alpha-tocopherol, 26 +/- 3 for beta-tocopherol, 4 +/- 2 for gamma-tocopherol, not detected for delta-tocopherol, 49 +/- 6 for MDT, and 30 +/- 7 for alpha-tocomonoenol. The VE-RBA in brain was 100 for alpha-tocopherol, 5 +/- 2 for beta-tocopherol, not detected for gamma-tocopherol and delta-tocopherol, 8 +/- 1 for MDT, and 4 +/- 1 for alpha-tocomonoenol. Tocopherols and tocomonoenols did not accumulate in the spleen or lung. MDT and alpha-tocomonoenol had high VE-RBA values. The VE-RBA value for MDT was much higher than that for beta-tocopherol.

  18. Probing the effects of Lorentz-symmetry violating Chern-Simons and Ricci-Cotton terms in higher derivative gravity

    SciTech Connect

    Pereira-Dias, B.; Hernaski, C. A.; Helayeel-Neto, J. A.

    2011-04-15

    The combined effects of the Lorentz-symmetry violating Chern-Simons and Ricci-Cotton actions are investigated for the Einstein-Hilbert gravity in the second-order formalism modified by higher derivative terms, and their consequences on the spectrum of excitations are analyzed. We follow the lines of previous works and build up an orthonormal basis of projector-like operators for the degrees of freedom, rather than for the spin modes of the fields. With this new basis, the attainment of the propagators is remarkably simplified and the identification of the physical and unphysical modes becomes more immediate. Our conclusion is that the only tachyon- and ghost-free model is the Einstein-Hilbert action added up by the Chern-Simons term with a timelike vector of the type v{sup {mu}=}({mu},0-vector). Spectral consistency imposes that the Ricci-Cotton term must be switched off. We then infer that gravity with Lorentz-symmetry violation imposes a drastically different constraint on the background if compared to ordinary gauge theories whenever conditions for the suppression of tachyons and ghosts are imposed.

  19. Traditional acupuncturists and higher education in Britain: the dual, paradoxical impact of biomedical alignment on the holistic view.

    PubMed

    Givati, Assaf; Hatton, Kieron

    2015-04-01

    Traditional acupuncturists' quest for external legitimacy in Britain involves the standardization of their knowledge bases through the development of training schools and syllabi, formal educational structures, and, since the 1990s, the teaching of undergraduate courses within (or validated by) Higher Education Institutions (HEIs), a process which entails biomedical alignment of the curriculum. However, as holistic discourses were commonly used as a rhetorical strategy by CAM practitioners to distance themselves from biomedicine and as a source of public appeal, this 'mainstreaming' process evoked practitioners' concerns that their holistic claims are being compromised. An additional challenge is being posed by a group of academics and scientists in Britain who launched an attack on CAM courses taught in HEIs, accusing them of being 'unscientific' and 'non-academic' in nature. This paper explores the negotiation of all these challenges during the formalization of traditional acupuncture education in Britain, with a particular focus on the role of HEIs. The in-depth qualitative investigation draws on several data sets: participant observation in a university validated acupuncture course; in-depth interviews; and documentary analysis. The findings show how, as part of the formalization process, acupuncturists in Britain (re)negotiate their holistic, anti-reductionist discourses and claims in relation to contemporary societal, political and cultural forces. Moreover, the teaching and validation of acupuncture courses by HEIs may contribute to broadening acupuncturists' 'holistic awareness' of societal and cultural influences on individuals' and communities' ill-health. This investigation emphasises the dynamic and context-specific (rather than fixed and essentialized) nature of acupuncture practice and knowledge. Copyright © 2015 Elsevier Ltd. All rights reserved.

  20. Viewing as little as 1 hour of TV daily is associated with higher change in BMI between kindergarten and first grade.

    PubMed

    Peck, Travis; Scharf, Rebecca J; Conaway, Mark R; DeBoer, Mark D

    2015-08-01

    Evaluate associations between TV viewing and weight status in children from kindergarten to first grade. Linear and logistic regression was used to evaluate associations of TV-viewing time on BMI-z-score cross-sectionally at kindergarten and first grade and longitudinally in between, among a nationally representative sample of 14,645 children from the Early Childhood Longitudinal Study-Kindergarten Cohort 2011. All analyses were adjusted for sex, race/ethnicity, parental education, and household income. Weekday TV-viewing time was correlated with BMI-z-score (P < 0.01) at kindergarten and first grade and with change in BMI-z-score in between (P < 0.05). Compared with children watching <1 h of TV daily, children watching ≥1 h in kindergarten and first grade had a greater odds of overweight (1.50-1.60) and obesity (1.58-1.73). Children watching 1-<2 h and ≥2 h daily had higher BMI-z-scores (P < 0.0001) and less favorable changes in BMI-z-score between time points (P < 0.05). Children who were not overweight or obese in kindergarten and watched ≥1 h of TV had a greater odds of becoming overweight (1.39) and obese (1.86) between evaluations. Children watching as little as 1-<2 h of TV daily were more likely to become overweight and obese over time. Physicians should encourage families to restrict TV-viewing time to reduce weight gain. © 2015 The Obesity Society.

  1. Analysis of absorption spectra of purple bacterial reaction centers in the near infrared region by higher order derivative spectroscopy.

    PubMed

    Mikhailyuk, I K; Knox, P P; Paschenko, V Z; Razjivin, A P; Lokstein, H

    2006-06-20

    Reaction centers (RCs) of purple bacteria are uniquely suited objects to study the mechanisms of the photosynthetic conversion of light energy into chemical energy. A recently introduced method of higher order derivative spectroscopy [I.K. Mikhailyuk, H. Lokstein, A.P. Razjivin, A method of spectral subband decomposition by simultaneous fitting the initial spectrum and a set of its derivatives, J. Biochem. Biophys. Methods 63 (2005) 10-23] was used to analyze the NIR absorption spectra of RC preparations from Rhodobacter (R.) sphaeroides strain 2R and Blastochloris (B.) viridis strain KH, containing bacteriochlorophyll (BChl) a and b, respectively. Q(y) bands of individual RC porphyrin components (BChls and bacteriopheophytins, BPheo) were identified. The results indicate that the upper exciton level P(y+) of the photo-active BChl dimer in RCs of R. sphaeroides has an absorption maximum of 810nm. The blue shift of a complex integral band at approximately 800nm upon oxidation of the RC is caused primarily by bleaching of P(y+), rather than by an electrochromic shift of the absorption band(s) of the monomeric BChls. Likewise, the disappearance of a band peaking at 842nm upon oxidation of RCs from B. viridis indicates that this band has to be assigned to P(y+). A blue shift of an absorption band at approximately 830nm upon oxidation of RCs of B. viridis is also essentially caused by the disappearance of P(y+), rather than by an electrochromic shift of the absorption bands of monomeric BChls. Absorption maxima of the monomeric BChls, B(B) and B(A) are at 802 and 797nm, respectively, in RCs of R. sphaeroides at room temperature. BPheo co-factors H(B) and H(A) peak at 748 and 758nm, respectively, at room temperature. For B. viridis RCs the spectral positions of H(B) and H(A) were found to be 796 and 816nm, respectively, at room temperature.

  2. Holistic Face Categorization in Higher Order Visual Areas of the Normal and Prosopagnosic Brain: Toward a Non-Hierarchical View of Face Perception

    PubMed Central

    Rossion, Bruno; Dricot, Laurence; Goebel, Rainer; Busigny, Thomas

    2011-01-01

    How a visual stimulus is initially categorized as a face in a network of human brain areas remains largely unclear. Hierarchical neuro-computational models of face perception assume that the visual stimulus is first decomposed in local parts in lower order visual areas. These parts would then be combined into a global representation in higher order face-sensitive areas of the occipito-temporal cortex. Here we tested this view in fMRI with visual stimuli that are categorized as faces based on their global configuration rather than their local parts (two-tones Mooney figures and Arcimboldo's facelike paintings). Compared to the same inverted visual stimuli that are not categorized as faces, these stimuli activated the right middle fusiform gyrus (“Fusiform face area”) and superior temporal sulcus (pSTS), with no significant activation in the posteriorly located inferior occipital gyrus (i.e., no “occipital face area”). This observation is strengthened by behavioral and neural evidence for normal face categorization of these stimuli in a brain-damaged prosopagnosic patient whose intact right middle fusiform gyrus and superior temporal sulcus are devoid of any potential face-sensitive inputs from the lesioned right inferior occipital cortex. Together, these observations indicate that face-preferential activation may emerge in higher order visual areas of the right hemisphere without any face-preferential inputs from lower order visual areas, supporting a non-hierarchical view of face perception in the visual cortex. PMID:21267432

  3. Association of Higher Consumption of Foods Derived From Subsidized Commodities With Adverse Cardiometabolic Risk Among US Adults.

    PubMed

    Siegel, Karen R; McKeever Bullard, Kai; Imperatore, Giuseppina; Kahn, Henry S; Stein, Aryeh D; Ali, Mohammed K; Narayan, K M

    2016-08-01

    Food subsidies are designed to enhance food availability, but whether they promote cardiometabolic health is unclear. To investigate whether higher consumption of foods derived from subsidized food commodities is associated with adverse cardiometabolic risk among US adults. Cross-sectional analysis of the National Health and Nutrition Examination Survey data from 2001 to 2006. Our final analysis was performed in January 2016. Participants were 10 308 nonpregnant adults 18 to 64 years old in the general community. From a single day of 24-hour dietary recall in the National Health and Nutrition Examination Survey, we calculated an individual-level subsidy score that estimated an individual's consumption of subsidized food commodities as a percentage of total caloric intake. The main outcomes were body mass index (calculated as weight in kilograms divided by height in meters squared), abdominal adiposity, C-reactive protein level, blood pressure, non-high-density lipoprotein cholesterol level, and glycemia. Among 10 308 participants, the mean (SD) age was 40.2 (0.3) years, and a mean (SD) of 50.5% (0.5%) were male. Overall, 56.2% of calories consumed were from the major subsidized food commodities. United States adults in the highest quartile of the subsidy score (compared with the lowest) had increased probabilities of having a body mass index of at least 30 (prevalence ratio, 1.37; 95% CI, 1.23-1.52), a ratio of waist circumference to height of at least 0.60 (prevalence ratio, 1.41; 95% CI, 1.25-1.59), a C-reactive protein level of at least 0.32 mg/dL (prevalence ratio, 1.34; 95% CI, 1.19-1.51), an elevated non-high-density lipoprotein cholesterol level (prevalence ratio, 1.14; 95% CI, 1.05-1.25), and dysglycemia (prevalence ratio, 1.21; 95% CI, 1.04-1.40). There was no statistically significant association between the subsidy score and blood pressure. Among US adults, higher consumption of calories from subsidized food commodities was associated with a greater

  4. Teachers' views of using e-learning for non-traditional students in higher education across three disciplines [nursing, chemistry and management] at a time of massification and increased diversity in higher education.

    PubMed

    Allan, Helen T; O'Driscoll, Mike; Simpson, Vikki; Shawe, Jill

    2013-09-01

    The expansion of the higher educational sector in the United Kingdom over the last two decades to meet political aspirations of the successive governments and popular demand for participation in the sector (the Widening Participation Agenda) has overlapped with the introduction of e-learning. This paper describes teachers' views of using e-learning for non-traditional students in higher education across three disciplines [nursing, chemistry and management] at a time of massification and increased diversity in higher education. A three phase, mixed methods study; this paper reports findings from phase two of the study. One university in England. Higher education teachers teaching on the nursing, chemistry and management programmes. Focus groups with these teachers. Findings from these data show that teachers across the programmes have limited knowledge of whether students are non-traditional or what category of non-traditional status they might be in. Such knowledge as they have does not seem to influence the tailoring of teaching and learning for non-traditional students. Teachers in chemistry and nursing want more support from the university to improve their use of e-learning, as did teachers in management but to a lesser extent. Our conclusions confirm other studies in the field outside nursing which suggest that non-traditional students' learning needs have not been considered meaningfully in the development of e-learning strategies in universities. We suggest that this may be because teachers have been required to develop e-learning at the same time as they cope with the massification of, and widening participation in, higher education. The findings are of particular importance to nurse educators given the high number of non-traditional students on nursing programmes. Copyright © 2012 Elsevier Ltd. All rights reserved.

  5. Methane-derived carbon flows through methane-oxidizing bacteria to higher trophic levels in aquatic systems.

    PubMed

    Deines, Peter; Bodelier, Paul L E; Eller, Gundula

    2007-05-01

    Recent investigations have shown that biogenic methane can be a carbon source for macro invertebrates in freshwater food webs. Stable carbon isotopic signatures, used to infer an organism's food source, indicated that methane can play a major role in the nutrition of chironomid larvae. However, the pathway of methane-derived carbon into invertebrate biomass is still not confirmed. It has been proposed that chironomid larvae ingest methane-oxidizing bacteria (MOB), but this has not been experimentally demonstrated to date. Using (13)C-labelled methane we could show for the first time that chironomid larvae assimilate methane-derived carbon through MOB. Chironomid larval biomass was significantly (13)C-enriched after dwelling for 10 days in lake sediment enriched with labelled methane. Moreover, phospholipid fatty acids diagnostic for MOB were detected in larval tissue and were significantly (13)C-enriched, which encompasses the (13)C-uptake predicted for a methane-based nutrition. Additionally, chironomid larvae fed on sediment and water-column derived MOB biomass.

  6. BTZ black hole with higher derivatives, the second law of thermodynamics, and statistical entropy: A new proposal

    SciTech Connect

    Park, Mu-In

    2008-06-15

    I consider the thermodynamics of the BTZ black hole in the presence of the higher curvature and gravitational Chern-Simons terms, and its statistical entropy. I propose a new thermodynamical entropy, which is manifestly non-negative, such that the second law of thermodynamics is satisfied. I show that the new thermodynamical entropy agrees perfectly with the statistical entropy for all the values of the conformal factor of the higher curvature terms and the coupling constant of the gravitational Chern-Simons term, in contrast to some disagreements in the literature. The agreement with both the higher curvature and gravitational Chern-Simons terms is possible because of an appropriate balancing of them, though it is not a trivial matter because of a conflict in the appropriate Hilbert space for a well-defined conformal field theory for each term.

  7. BTZ black hole with higher derivatives, the second law of thermodynamics, and statistical entropy: A new proposal

    NASA Astrophysics Data System (ADS)

    Park, Mu-In

    2008-06-01

    I consider the thermodynamics of the BTZ black hole in the presence of the higher curvature and gravitational Chern-Simons terms, and its statistical entropy. I propose a new thermodynamical entropy, which is manifestly non-negative, such that the second law of thermodynamics is satisfied. I show that the new thermodynamical entropy agrees perfectly with the statistical entropy for all the values of the conformal factor of the higher curvature terms and the coupling constant of the gravitational Chern-Simons term, in contrast to some disagreements in the literature. The agreement with both the higher curvature and gravitational Chern-Simons terms is possible because of an appropriate balancing of them, though it is not a trivial matter because of a conflict in the appropriate Hilbert space for a well-defined conformal field theory for each term.

  8. Lutein derived fragments exhibit higher antioxidant and anti-inflammatory properties than lutein in lipopolysaccharide induced inflammation in rats.

    PubMed

    Nidhi, Bhatiwada; Sharavana, Gurunathan; Ramaprasad, Talahalli R; Vallikannan, Baskaran

    2015-02-01

    In the present study, we appraise the anti-inflammatory efficacy of lutein oxidative degradation derivatives mediated through UV-irradiation over lutein in counteracting the inflammation induced by lipopolysaccharide (LPS) in rats (n = 5 per group). UV-irradiated lutein fragments were identified as anhydrolutein (B, C40H54O), 2,6,6-trimethylcyclohexa-1,4-dienylium (M1, C9H13), (2E,4E,6E,8E)-9-(4-hydroxy-2,6,6-trimethylcyclohex-1-1en-1-yl)-3,7-dimethylnona-2,4,6,8-tetraen-1-ylium (M2, C20H29O), 4-[(1E,3E,5E,7E)-3,7,-dimethyldeca-1,3,5,7-tetraen-1-yl]-3,5,5-methylcyclohex-3-en-1-ol (M3, C21H30O) and zeaxanthin (M4, C40H56O) and its isomers as 13'-Z zeaxanthin, 13'-Z lutein, all-trans zeaxanthin, and 9-Z lutein. Induction of inflammation by LPS significantly increased the production of nitrites (3.3 fold in the serum and 2.6 fold in the liver), prostaglandin E2 (26 fold in the serum), and pro-inflammatory cytokines like tumor necrosis factor-α (6.6 fold in the serum), and interleukin-6 (4.8 fold in the serum). Oxidative derivatives of lutein, especially M1, M2 and M3, ameliorated acute inflammation in rats by inhibiting the production of nitrites, malondialdehyde (MDA), PGE2, TNF-α, and IL-6 cytokines more efficiently than lutein in rats. The anti-inflammatory mechanism of derivatives might be related to the decrease of inflammatory cytokines and the increase of antioxidant enzymes (superoxide dismutase, catalase, glutathione peroxidase, glutathione S transferase, glutathione reductase), which would result in the reduction of iNOS, COX-2 and MDA and subsequently inflammatory responses.

  9. On the creation of particles in the Euclidean region of a gravitational theory with higher-derivative terms

    SciTech Connect

    Pollock, M.D. )

    1988-08-01

    It has been shown that particles can be created at a catastrophic rate during the process of quantum tunnelling through a potential barrier in the early Universe, signalling the breakdown of the semi-classical approximation upon which the calculations are based. Starting from the Wheeler-DeWitt equation in minisuperspace, Rubakov first derived a Schrodinger equation for the matter, which implies exponential growth of the matter wave-function Psi/sub M/. This is the origin of the effect which the authors consider. In lorentzian space-time they obtain the usual Schrodinger equation for Psi/sub M/.

  10. Synthesis of higher alcohols over highly dispersed Cu-Fe based catalysts derived from layered double hydroxides.

    PubMed

    Han, Xinyou; Fang, Kegong; Zhou, Juan; Zhao, Lu; Sun, Yuhan

    2016-05-15

    Highly dispersed Cu-Fe based catalysts with Fe/Cu molar ratios ranging from 0.2 to 1 were prepared via thermal decomposition of layered double hydroxides (LDHs) precursors and tested for higher alcohol synthesis (HAS) via CO hydrogenation. The catalysts were characterized using different techniques such as XRD, TEM, XPS, and H2-TPR. It was demonstrated that the Cu and Fe ions were highly dispersed in the brucite-like layers of the LDHs. With increased Fe/Cu atomic ratio, the tetrahedrally coordinated Cu ion content, Cu reduction temperatures, and the spacing of layers initially increase until the Fe/Cu ratio reaches 0.5 and then decrease. In addition to the catalytic evaluation for CO hydrogenation and catalyst characterization, the relationships between the physical-chemical properties of the catalysts and their catalytic performances were also investigated. It was also found that the alcohols/hydrocarbons ratios correlate linearly with the tetrahedrally coordinated Cu ion content. Moreover, higher reduction temperatures of Cu species as well as larger spacing between the layers in the catalyst are favorable for the synthesis of alcohols. The incorporation of a suitable amount of Fe is beneficial for the production of higher alcohols, with the best catalytic performance (alcohol selectivity of 20.77% and C2+ alcohol selectivity of 48.06%) obtained from a Fe/Cu atomic ratio of 0.5.

  11. Singly modified amikacin and tobramycin derivatives show increased rRNA A-site binding and higher potency against resistant bacteria.

    PubMed

    Fair, Richard J; McCoy, Lisa S; Hensler, Mary E; Aguilar, Bernice; Nizet, Victor; Tor, Yitzhak

    2014-09-01

    Semisynthetic derivatives of the clinically useful aminoglycosides tobramycin and amikacin were prepared by selectively modifying their 6'' positions with a variety of hydrogen bond donors and acceptors. Their binding to the rRNA A-site was probed using an in vitro FRET-based assay, and their antibacterial activities against several resistant strains (e.g., Pseudomonas aeruginosa, Klebsiella pneumonia, MRSA) were quantified by determining minimum inhibitory concentrations (MICs). The most potent derivatives were evaluated for their eukaryotic cytotoxicity. Most analogues displayed higher affinity for the bacterial A-site than the parent compounds. Although most tobramycin analogues exhibited no improvement in antibacterial activity, several amikacin analogues showed potent and broad-spectrum antibacterial activity against resistant bacteria. Derivatives tested for eukaryotic cytotoxicity exhibited minimal toxicity, similar to the parent compounds.

  12. Exact zeros of entanglement for arbitrary rank-two mixtures derived from a geometric view of the zero polytope

    NASA Astrophysics Data System (ADS)

    Osterloh, Andreas

    2016-12-01

    Here I present a method for how intersections of a certain density matrix of rank 2 with the zero polytope can be calculated exactly. This is a purely geometrical procedure which thereby is applicable to obtaining the zeros of SL- and SU-invariant entanglement measures of arbitrary polynomial degree. I explain this method in detail for a recently unsolved problem. In particular, I show how a three-dimensional view, namely, in terms of the Bloch-sphere analogy, solves this problem immediately. To this end, I determine the zero polytope of the three-tangle, which is an exact result up to computer accuracy, and calculate upper bounds to its convex roof which are below the linearized upper bound. The zeros of the three-tangle (in this case) induced by the zero polytope (zero simplex) are exact values. I apply this procedure to a superposition of the four-qubit Greenberger-Horne-Zeilinger and W state. It can, however, be applied to every case one has under consideration, including an arbitrary polynomial convex-roof measure of entanglement and for arbitrary local dimension.

  13. Bimetallic CuCo nanoparticles derived from hydrotalcite supported on carbon fibers for higher alcohols synthesis from syngas

    NASA Astrophysics Data System (ADS)

    Wang, Lianfang; Cao, Ang; Liu, Guilong; Zhang, Lihong; Liu, Yuan

    2016-01-01

    Higher alcohols synthesis (HAS) is a strong exothermal reaction which leads to the formation of hotspots on the catalysts and the hotspots result in poor selectivity, and Cu-Co based catalysts are one of the most promising to which the formation of Cu-Co alloy is critical. Therefore a new scheme was proposed, based on the excellent thermal conductivity of carbon fibers (CFs) and the uniform mixing of metal ions in layered double hydroxides (LDHs), the latter favors the formation of metallic alloy. Nanocomposites of LDHs and CFs were prepared by using co-precipitation method and used for HAS, and characterized by using FTIR, N2 adsorption-desorption, XRD, TPR, SEM and TEM techniques. In the composites, nanosheets with the typical LDHs morphology are perpendicularly grown on the surface of CFs while intersecting each other, creating a highly open and porous structure. After reduction, Cu-Co-alloy nanoparticles are formed from the LDHs. The resultant catalysts showed high activity and much high selectivity to higher alcohols. The reported methods can be expanded to prepare other LDHs/CFs composites.

  14. Estradiol promotes proliferation of dopaminergic precursors resulting in a higher proportion of dopamine neurons derived from mouse embryonic stem cells.

    PubMed

    Díaz, Néstor F; Díaz-Martínez, Néstor E; Camacho-Arroyo, Ignacio; Velasco, Iván

    2009-08-01

    Estradiol protects dopamine neurons of the substantia nigra from toxic insults. Such neurons succumb in Parkinson's disease; one strategy for restoring dopamine deficiency is cell therapy with neurons differentiated from embryonic stem cells. We investigated the effects of 17beta-estradiol on dopaminergic induction of embryonic stem cells using the 5-stage protocol. Cells were incubated with different steroid concentrations during the proliferation (stage 4) or differentiation (stage 5) phases. Estradiol added at nM concentrations only during stage 4 increases the proliferation of dopaminergic precursors expressing Lmx1a, inducing a higher proportion of dopamine neurons at stage 5. These actions were mediated by activation of estrogen receptors, because co-incubation of cells with estradiol and ICI 182,780 completely abolished the positive effect on both proliferation of committed precursors, and subsequent differentiation to dopaminergic neurons. Our results suggest that estradiol should be useful in producing higher proportions of dopamine neurons from embryonic stem cells aimed for treating Parkinson's disease.

  15. Estradiol promotes proliferation of dopaminergic precursors resulting in a higher proportion of dopamine neurons derived from mouse embryonic stem cells

    PubMed Central

    Díaz, Néstor F.; Díaz-Martínez, Néstor E.; Camacho-Arroyo, Ignacio; Velasco, Iván

    2009-01-01

    Estradiol protects dopamine neurons of the substantia nigra from toxic insults. Such neurons succumb in Parkinson’s disease; one strategy for restoring dopamine deficiency is cell therapy with neurons differentiated from embryonic stem cells. We investigated the effects of 17β-estradiol on dopaminergic induction of embryonic stem cells using the 5-stage protocol. Cells were incubated with different steroid concentrations during the proliferation (stage 4) or differentiation (stage 5) phases. Estradiol added at nM concentrations only during stage 4 increases the proliferation of dopaminergic precursors expressing Lmx1a, inducing a higher proportion of dopamine neurons at stage 5. These actions were mediated by activation of estrogen receptors, because co-incubation of cells with estradiol and ICI 182,780 completely abolished the positive effect on both proliferation of committed precursors, and subsequent differentiation to dopaminergic neurons. Our results suggest that estradiol should be useful to produce higher proportions of dopamine neurons from embryonic stem cells aimed for treating Parkinson’s disease. PMID:19379802

  16. PcpA Promotes Higher Levels of Infection and Modulates Recruitment of Myeloid-Derived Suppressor Cells during Pneumococcal Pneumonia.

    PubMed

    Walker, Melissa M; Novak, Lea; Widener, Rebecca; Grubbs, James Aaron; King, Janice; Hale, Joanetha Y; Ochs, Martina M; Myers, Lisa E; Briles, David E; Deshane, Jessy

    2016-03-01

    We used two different infection models to investigate the kinetics of the PcpA-dependent pneumococcal disease in mice. In a bacteremic pneumonia model, we observed a PcpA-dependent increase in bacterial burden in the lungs, blood, liver, bronchoalveolar lavage, and spleens of mice at 24 h postinfection. This PcpA-dependent effect on bacterial burden appeared earlier (within 12 h) in the focal pneumonia model, which lacks bacteremia or sepsis. Histological changes show that the ability of pneumococci to make PcpA was associated with unresolved inflammation in both models of infection. Using our bacteremic pneumonia model we further investigated the effects of PcpA on recruitment of innate immune regulatory cells. The presence of PcpA was associated with increased IL-6 levels, suppressed production of TRAIL, and reduced infiltration of polymorphonuclear cells. The ability of pneumococci to make PcpA negatively modulated both the infiltration and apoptosis of macrophages and the recruitment of myeloid-derived suppressor-like cells. The latter have been shown to facilitate the clearance and control of bacterial pneumonia. Taken together, the ability to make PcpA was strongly associated with increased bacterial burden, inflammation, and negative regulation of innate immune cell recruitment to the lung tissue during bacteremic pneumonia.

  17. Simple locking of infrared and ultraviolet diode lasers to a visible laser using a LabVIEW proportional-integral-derivative controller on a Fabry-Perot signal

    NASA Astrophysics Data System (ADS)

    Kwolek, J. M.; Wells, J. E.; Goodman, D. S.; Smith, W. W.

    2016-05-01

    Simultaneous laser locking of infrared (IR) and ultraviolet lasers to a visible stabilized reference laser is demonstrated via a Fabry-Perot (FP) cavity. LabVIEW is used to analyze the input, and an internal proportional-integral-derivative algorithm converts the FP signal to an analog locking feedback signal. The locking program stabilized both lasers to a long term stability of better than 9 MHz, with a custom-built IR laser undergoing significant improvement in frequency stabilization. The results of this study demonstrate the viability of a simple, computer-controlled, non-temperature-stabilized FP locking scheme for our applications, laser cooling of Ca+ ions, and its use in other applications with similar modest frequency stabilization requirements.

  18. Simple locking of infrared and ultraviolet diode lasers to a visible laser using a LabVIEW proportional-integral-derivative controller on a Fabry-Perot signal.

    PubMed

    Kwolek, J M; Wells, J E; Goodman, D S; Smith, W W

    2016-05-01

    Simultaneous laser locking of infrared (IR) and ultraviolet lasers to a visible stabilized reference laser is demonstrated via a Fabry-Perot (FP) cavity. LabVIEW is used to analyze the input, and an internal proportional-integral-derivative algorithm converts the FP signal to an analog locking feedback signal. The locking program stabilized both lasers to a long term stability of better than 9 MHz, with a custom-built IR laser undergoing significant improvement in frequency stabilization. The results of this study demonstrate the viability of a simple, computer-controlled, non-temperature-stabilized FP locking scheme for our applications, laser cooling of Ca(+) ions, and its use in other applications with similar modest frequency stabilization requirements.

  19. MATLAB-based algorithm to estimate depths of isolated thin dike-like sources using higher-order horizontal derivatives of magnetic anomalies.

    PubMed

    Ekinci, Yunus Levent

    2016-01-01

    This paper presents an easy-to-use open source computer algorithm (code) for estimating the depths of isolated single thin dike-like source bodies by using numerical second-, third-, and fourth-order horizontal derivatives computed from observed magnetic anomalies. The approach does not require a priori information and uses some filters of successive graticule spacings. The computed higher-order horizontal derivative datasets are used to solve nonlinear equations for depth determination. The solutions are independent from the magnetization and ambient field directions. The practical usability of the developed code, designed in MATLAB R2012b (MathWorks Inc.), was successfully examined using some synthetic simulations with and without noise. The algorithm was then used to estimate the depths of some ore bodies buried in different regions (USA, Sweden, and Canada). Real data tests clearly indicated that the obtained depths are in good agreement with those of previous studies and drilling information. Additionally, a state-of-the-art inversion scheme based on particle swarm optimization produced comparable results to those of the higher-order horizontal derivative analyses in both synthetic and real anomaly cases. Accordingly, the proposed code is verified to be useful in interpreting isolated single thin dike-like magnetized bodies and may be an alternative processing technique. The open source code can be easily modified and adapted to suit the benefits of other researchers.

  20. Comparison of GPS tropospheric delays derived from two consecutive EPN reprocessing campaigns from the point of view of climate monitoring

    NASA Astrophysics Data System (ADS)

    Baldysz, Zofia; Nykiel, Grzegorz; Araszkiewicz, Andrzej; Figurski, Mariusz; Szafranek, Karolina

    2016-09-01

    The main purpose of this research was to acquire information about consistency of ZTD (zenith total delay) linear trends and seasonal components between two consecutive GPS reprocessing campaigns. The analysis concerned two sets of the ZTD time series which were estimated during EUREF (Reference Frame Sub-Commission for Europe) EPN (Permanent Network) reprocessing campaigns according to 2008 and 2015 MUT AC (Military University of Technology Analysis Centre) scenarios. Firstly, Lomb-Scargle periodograms were generated for 57 EPN stations to obtain a characterisation of oscillations occurring in the ZTD time series. Then, the values of seasonal components and linear trends were estimated using the LSE (least squares estimation) approach. The Mann-Kendall trend test was also carried out to verify the presence of linear long-term ZTD changes. Finally, differences in seasonal signals and linear trends between these two data sets were investigated. All these analyses were conducted for the ZTD time series of two lengths: a shortened 16-year series and a full 18-year one. In the case of spectral analysis, amplitudes of the annual and semi-annual periods were almost exactly the same for both reprocessing campaigns. Exceptions were found for only a few stations and they did not exceed 1 mm. The estimated trends were also similar. However, for the reprocessing performed in 2008, the trends values were usually higher. In general, shortening of the analysed time period by 2 years resulted in a decrease of the linear trends values of about 0.07 mm yr-1. This was confirmed by analyses based on two data sets.

  1. An Investigation into Higher Education Student and Lecturer Views on Research Publication and Their Interest in the Production of a College Partnership Science Journal

    ERIC Educational Resources Information Center

    Schofield, C.; Burton, F. L.

    2015-01-01

    The primary aim of this research was to investigate students' views of using published research and their attitudes towards the research activities of their lecturers. Although this has been examined often in university settings the focus here was on science students undertaking foundation degrees in Further Education Colleges (FECs). This was…

  2. Predicting forest structural parameters using the image texture derived from WorldView-2 multispectral imagery in a dryland forest, Israel

    NASA Astrophysics Data System (ADS)

    Ozdemir, Ibrahim; Karnieli, Arnon

    2011-10-01

    Estimation of forest structural parameters by field-based data collection methods is both expensive and time consuming. Satellite remote sensing is a low-cost alternative in modeling and mapping structural parameters in large forest areas. The current study investigates the potential of using WordView-2 multispectral satellite imagery for predicting forest structural parameters in a dryland plantation forest in Israel. The relationships between image texture features and the several structural parameters such as Number of Trees (NT), Basal Area (BA), Stem Volume (SV), Clark-Evans Index (CEI), Diameter Differentiation Index (DDI), Contagion Index (CI), Gini Coefficient (GC), and Standard Deviation of Diameters at Breast Heights (SDDBH) were examined using correlation analyses. These variables were obtained from 30 m × 30 m square-shaped plots. The Standard Deviation of Gray Levels (SDGL) as a first order texture feature and the second order texture variables based on Gray Level Co-occurrence Matrix (GLCM) were calculated for the pixels that corresponds to field plots. The results of the correlation analysis indicate that the forest structural parameters are significantly correlated with the image texture features. The highest correlation coefficients were calculated for the relationships between the SDDBH and the contrast of red band ( r = 0.75, p < 0.01), the BA and the entropy of blue band ( r = 0.73, p < 0.01), and the GC and the contrast of blue band ( r = 0.71, p < 0.01). Each forest structural parameter was modeled as a function of texture measures derived from the satellite image using stepwise multi linear regression analyses. The determination coefficient ( R2) and root mean square error (RMSE) values of the best fitting models, respectively, are 0.38 and 109.56 ha -1 for the NT; 0.54 and 1.79 m 2 ha -1 for the BA; 0.42 and 27.18 m 3 ha -1 for the SV; 0.23 and 0.16 for the CEI; 0.32 and 0.05 for the DDI; 0.25 and 0.06 for the CI; 0.50 and 0.05 for the GC

  3. Dental pulp-derived stromal cells exhibit a higher osteogenic potency than bone marrow-derived stromal cells in vitro and in a porcine critical-size bone defect model

    PubMed Central

    Jensen, Jonas; Tvedesøe, Claus; Rölfing, Jan Hendrik Duedal; Foldager, Casper Bindzus; Lysdahl, Helle; Kraft, David Christian Evar; Chen, Muwan; Baas, Jorgen; Le, Dang Quang Svend; Bünger, Cody Eric

    2016-01-01

    Introduction: The osteogenic differentiation of bone marrow-derived mesenchymal stromal cells (BMSCs) was compared with that of dental pulp-derived stromal cells (DPSCs) in vitro and in a pig calvaria critical-size bone defect model. Methods: BMSCs and DPSCs were extracted from the tibia bone marrow and the molar teeth of each pig, respectively. BMSCs and DPSCs were cultured in monolayer and on a three-dimensional (3D) polycaprolactone (PCL) – hyaluronic acid – tricalcium phosphate (HT-PCL) scaffold. Population doubling (PD), alkaline phosphatase (ALP) activity, and calcium deposition were measured in monolayer. In the 3D culture ALP activity, DNA content, and calcium deposition were evaluated. Six non-penetrating critical-size defects were made in each calvarium of 14 pigs. Three paired sub-studies were conducted: (1) empty defects vs. HT-PCL scaffolds; (2) PCL scaffolds vs. HT-PCL scaffolds; and (3) autologous BMSCs on HT-PCL scaffolds vs. autologous DPSCs on HT-PCL scaffolds. The observation time was five weeks. Bone volume fractions (BV/TV) were assessed with micro-computed tomography (μCT) and histomorphometry. Results and discussion: The results from the in vitro study revealed a higher ALP activity and calcium deposition of the DPSC cultures compared with BMSC cultures. Significantly more bone was present in the HT-PCL group than in both the pure PCL scaffold group and the empty defect group in vivo. DPSCs generated more bone than BMSCs when seeded on HT-PCL. In conclusion, DPSCs exhibited a higher osteogenic potential compared with BMSCs both in vitro and in vivo, making it a potential cell source for future bone tissue engineering. PMID:27163105

  4. Polarized Human Embryonic Stem Cell-Derived Retinal Pigment Epithelial Cell Monolayers Have Higher Resistance to Oxidative Stress-Induced Cell Death Than Nonpolarized Cultures

    PubMed Central

    Hsiung, Jamie; Zhu, Danhong

    2015-01-01

    Oxidative stress-mediated injury to the retinal pigment epithelium (RPE) is a major factor involved in the pathogenesis of age-related macular degeneration (AMD), the leading cause of blindness in the elderly. Human embryonic stem cell (hESC)-derived RPE cells are currently being evaluated for their potential for cell therapy in AMD patients through subretinal injection of cells in suspension and subretinal placement as a polarized monolayer. To gain an understanding of how transplanted RPE cells will respond to the highly oxidatively stressed environment of an AMD patient eye, we compared the survival of polarized and nonpolarized RPE cultures following oxidative stress treatment. Polarized, nonpolarized/confluent, nonpolarized/subconfluent hESC-RPE cells were treated with H2O2. Terminal deoxynucleotidyl transferase dUTP nick end labeling stains revealed the highest amount of cell death in subconfluent hESC-RPE cells and little cell death in polarized hESC-RPE cells with H2O2 treatment. There were higher levels of proapoptotic factors (phosphorylated p38, phosphorylated c-Jun NH2-terminal kinase, Bax, and cleaved caspase 3 fragments) in treated nonpolarized RPE—particularly subconfluent cells—relative to polarized cells. On the other hand, polarized RPE cells had constitutively higher levels of cell survival and antiapoptotic signaling factors such as p-Akt and Bcl-2, as well as antioxidants superoxide dismutase 1 and catalase relative to nonpolarized cells, that possibly contributed to polarized cells’ higher tolerance to oxidative stress compared with nonpolarized RPE cells. Subconfluent cells were particularly sensitive to oxidative stress-induced apoptosis. These results suggest that implantation of polarized hESC-RPE monolayers for treating AMD patients with geographic atrophy should have better survival than injections of hESC-RPE cells in suspension. PMID:25411476

  5. Benefits and Limitations of Text Messages to Stimulate Higher Learning Among Community Providers: Participants' Views of an mHealth Intervention to Support Continuing Medical Education in Vietnam

    PubMed Central

    Sabin, Lora L; Larson Williams, Anna; Le, Bao Ngoc; Herman, Augusta R; Viet Nguyen, Ha; Albanese, Rebecca R; Xiong, Wenjun; Shobiye, Hezekiah OA; Halim, Nafisa; Tran, Lien Thi Ngoc; McNabb, Marion; Hoang, Hai; Falconer, Ariel; Nguyen, Tam Thi Thanh; Gill, Christopher J

    2017-01-01

    Background: A randomized controlled trial was conducted in 2015 to evaluate a mobile continuing medical education (mCME) intervention that provided daily text messages to community-based physicians' assistants (CBPAs) in Thai Nguyen Province, Vietnam. Although the intervention failed to improve medical knowledge over a 6-month period, a companion qualitative study provided insights on the views and experiences of intervention participants. Methods: We conducted focus group discussions (FGDs) and in-depth interviews (IDIs) among participants randomized to receive text messages containing either simple medical facts or quiz questions. Trained interviewers collected data immediately following the conclusion of the trial in December 2015. Using semi-structured question guides, respondents were queried on their views of the intervention, positive and negative, and perceived impacts of the intervention. During analysis, after learning that the intervention had failed to increase knowledge among participants, we also examined reasons for lack of improvement in medical knowledge. All analyses were performed in NVivo using a thematic approach. Results: A total of 70 CBPAs engaged in one of 8 FGDs or an IDI. One-half were men; average age among all respondents was 40 years. Most (81%) practiced in rural settings and most (51%) focused on general medicine. The mean length of work experience was 3 years. All respondents made positive comments about the intervention; convenience, relevance, and quick feedback (quiz format) were praised. Downsides encompassed lack of depth of information, weak interaction, technology challenges, and challenging/irrelevant messages. Respondents described perceived impacts encompassing increased motivation, knowledge, collegial discussions, Internet use to search for more information, and clinical skills. Overall, they expressed a desire for the intervention to continue and recommended expansion to other medical professionals. Overreliance on the

  6. A Higher Proportion of Metabolic Syndrome in Chinese Subjects with Sleep-Disordered Breathing: A Case-Control Study Based on Electrocardiogram-Derived Sleep Analysis

    PubMed Central

    Tseng, Ping-Huei; Lee, Pei-Lin; Hsu, Wei-Chung; Ma, Yan; Lee, Yi-Chia; Chiu, Han-Mo; Ho, Yi-Lwun; Chen, Ming-Fong; Wu, Ming-Shiang; Peng, Chung-Kang

    2017-01-01

    Objective The prevalence of metabolic syndrome (MS) has increased rapidly in Taiwan and worldwide. We aim to determine the association between sleep-disordered breathing (SDB) and MS in a Chinese general population. Methods This case-control study recruited subjects who have undergone a prospective electrocardiogram-based cardiopulmonary coupling (CPC) sleep spectrogram as part of the periodic health check-ups at the National Taiwan University Hospital. Comprehensive anthropometrics, blood biochemistry, prevalence of MS and its individual components were compared with Bonferroni correction between 40 subjects with SDB, defined as the CPC-derived apnea–hypopnea index (CPC-AHI) >5 event/hour and 80 age- and sex-matched controls, defined as CPC-AHI <1 event/hour. MS was diagnosed based on the Adult Treatment Panel III, with a modification of waist circumference for Asians. Results Subjects with SDB were more obese with larger waist circumferences (95.1±12.9 vs. 87.3±6.9, P < .001) and borderline higher BMI (27.0±4.9 vs. 24.3±2.5, P = .002). Waist circumference was independently associated with the presence of SDB after adjustment for BMI, systolic blood pressure and fasting blood glucose in multiple regression analyses. Subjects with SDB had a higher prevalence of central obesity (72.5% vs. 42.5%, P = .002), hyperglycemia (45.0% vs. 26.3%, P = .04), MS (45.0% vs. 22.5%, P = .01) and number of MS components (2.4 ± 1.6 vs. 1.7 ± 1.4, P = .01) than the control group. Waist circumference was significantly correlated with both CPC-AHI (r = .492, P = .0013) and PSG-AHI (r = .699, P < .0001) in the SDB group. Conclusions SDB was associated with a higher prevalence of MS and its individual components, notably central obesity, in a Chinese general population. Large-scale screening of high risk population with MS to identify subjects with SDB for appropriate management is warranted. PMID:28081171

  7. Photodecomposition profiles of beta-bond cleavage of phenylphenacyl derivatives in the higher triplet excited states during stepwise two-color two-laser flash photolysis.

    PubMed

    Yamaji, Minoru; Cai, Xichen; Sakamoto, Masanori; Fujitsuka, Mamoru; Majima, Tetsuro

    2008-11-13

    Photochemical properties of p-phenylphenacyl derivatives (PP-X) having C-halide, C-S, and C-O bonds in the lowest (T 1) and higher (T n ) triplet excited states were investigated in solution by using single-color and stepwise two-color two-laser flash photolysis techniques. PP-Xs (X = Br, SH, and SPh) undergo beta-bond dissociation in the lowest singlet excited states (S 1) while the C-X bonds of other PP-Xs are stable upon 266-nm laser photolysis. The T 1(pi,pi*) states of PP-X were efficiently produced during 355-nm laser photolysis of benzophenone as a triplet sensitizer. Triplet PP-Xs deactivate to the ground state without photochemical reactions. Upon 430-nm laser photolysis of the T 1 states of PP-X (X = Br, Cl, SH, SPh, OH, OMe, and OPh), decomposition of PP-X in the T n states was found. On the basis of the changes in the transient absorption, quantum yields (Phi dec) of the decomposition of PP-X in the T n states were determined, while bond dissociation energies (BDE) of the C-X bonds were calculated by computations. According to the relationship between the Phi dec and BDE values, it was shown that the decomposition of PP-X in the T n state is due to beta-cleavage of the corresponding C-X bond, and that the state energy of the reactive T n for the C-O bond cleavage differs from that for the C-halide and C-S bond cleavage. The reaction profiles of the C-X bond cleavage of PP-X in the T n states were discussed.

  8. Separation of formants from glottal impulses in high-resolution spectrograms using higher-order short-time Fourier transform (STFT) phase derivatives

    NASA Astrophysics Data System (ADS)

    Fulop, Sean A.

    2004-10-01

    The channelized instantaneous frequency of a signal x(T) is CIFx(ω,T)=(∂/∂T)arg(Fh(ω,T)), where Fh is the short-time Fourier transform of x(T) using window function h. The local group delay of a signal is LGDx(ω,T)=-(∂/∂ω)arg(Fh(ω,T)). For each point Fh(ω0,T0) in the STFT, the f-t coordinates [CIF(ω0,T0),t-LGD(ω0,T0)] pinpoint the local mean of the Rihacek distribution of complex signal energy, and this reassignment of the STFT magnitude yields a high-resolution spectrogram without blurriness [Auger and Flandrin, ``Improving the readability of time-frequency and time-scale representations by the reassignment method,'' IEEE Trans. Signal Process 43(5), 1068-1089 (1995)]. Nelson [``Instantaneous higher order phase derivatives,'' Digital Signal Process 12, 416-428 (2002)] demonstrated that the significant AM/FM components of a signal x(T) have (∂/∂ω)CIFx(ω,T)~=0. By plotting just those STFT points meeting this condition to within a threshold, a spectrogram showing only speech resonances can be drawn using short analysis frames. By moving to a long-frame analysis, the resonance tracker becomes an effective pitch and harmonic tracker. Nelson further demonstrated that the impulses in a signal x(T) have (∂/∂T)LGDx(ω,T)~=1. By plotting just those points meeting this condition to within a threshold, a spectrogram of speech impulses can alternatively be drawn.

  9. Earth View, Art View

    ERIC Educational Resources Information Center

    Dambekalns, Lydia

    2005-01-01

    Educational practice today encourages interdisciplinary teaching as teachers address important basic themes from a variety of angles. In this article, the author talks about one of her successful projects that focuses on "sense of place" as one such theme, with the more specific charge of viewing Earth from both scientific and artistic…

  10. Does it make sense to heat gases higher than body temperature for the treatment of cold water near-drowning or hypothermia? A point of view paper.

    PubMed

    Wallace, W

    1997-01-01

    There appears to be several areas of concern relating to the continued use of heating gases higher than body temperature for the treatment of cold water near-drowning. The use of heated gases as a primary means to rewarm a hypothermic patient does not seem to be any more effective than doing nothing at all. These low rewarming rates translate into some very long resuscitations. Even Dr. Nemiroff, who was a strong advocate of using heated humidified gases for treating cold water near-drowning, did not consider the use of warm inspired gases to be a primary rewarming technique. He referred to the use of heated humidified gases as a, "stabilization technique". However, does it make sense to use a technique that is several times slower than other methods of similar complexity? Does it make sense to use a protocol that may in fact lower a hypothermic patient's basal metabolic rate? There are some major patient safety issues raised by heating gases to high levels. However, there have not been many patients with documented airway damage. I have several hypothesis about why this is so. Few people seem to know how to significantly heat their patient's circuit. If they devise a system that gets to the therapeutic range they usually have second thoughts when the bag-valve-mask is too hot to hold, or the plastic wide bore tubing begins to melt, they will reduce the system temperature on that basis alone. Many of the hypothermic patients who are intubated simply do not have good survival rates, and so we may underestimate the degree of airway damage that occurs. Spontaneously breathing patients will tend to refuse to breathe hot gases which limits their potential for airway damage. However, is this a risk we need to run? Would it not make more sense to heat the inspired gases to close to body temperature and avoid the problem? I feel that the time has come for the Respiratory Therapy community to come together and work on this problem. The researchers have done their jobs in

  11. Singly Modified Amikacin and Tobramycin Derivatives Show Increased rRNA A-site Binding and Higher Potency against Resistant Bacteria

    PubMed Central

    Fair, Richard J.; McCoy, Lisa S.; Hensler, Mary E.; Aguilar, Bernice

    2014-01-01

    Semi-synthetic derivatives of clinically useful aminoglycosides, tobramycin and amikacin, were prepared by selectively modifying their 6″ position with a variety of hydrogen bond donors and acceptors. Their binding to the rRNA A-site was probed using an in vitro FRET-based assay and their antibacterial activity against several resistant strains (e.g., P. aeruginosa, K. pneumonia, MRSA) was quantified by determining minimum inhibitory concentrations (MICs). The most potent derivatives were evaluated for their eukaryotic cytotoxicity. Most analogs displayed greater affinity for the bacterial A-site compared to the parent compounds. Although most tobramycin analogs exhibited no improvement antibacterial activity, several amikacin analogs showed potent and broad-spectrum antibacterial activity against resistant bacteria. Derivatives tested for eukaryotic cytotoxicity exhibited minimal toxicity, similar to the parent compounds. PMID:25055981

  12. Development and characterization of BAC-end sequence derived SSRs, and their incorporation into a new higher density genetic map for cultivated peanut (Arachis hypogaea L.)

    USDA-ARS?s Scientific Manuscript database

    Cultivated peanut (Arachis hypogaea L.) is an important crop worldwide, valued for its edible oil and digestible protein. It has a very narrow genetic base that may well derive from a relatively recent single polyploidization event. Accordingly molecular markers have low levels of polymorphism and t...

  13. Point of view: energy factors for food labelling and other purposes should be derived in a consistent fashion for all food components.

    PubMed

    Warwick, P M; Baines, J

    2000-12-01

    In Australia, the process by which food energy factors are derived for food labelling purposes is under review. One of the questions of international relevance is whether energy factors should be derived using a definition of metabolisable energy (ME) or a definition of net (metabolisable) energy (NME), or some mixture of the two. ME describes the food energy available for heat production and body gains. NME deducts obligatory thermogenesis from ME in an attempt to reflect the food energy that can be converted to ATP energy within the body. Some countries use NME to derive energy factors for novel food ingredients such as sugar alcohols and polydextrose, but continue to use ME for protein, fat, carbohydrate, and alcohol. The present paper puts a case for using a consistent system (ME at the present time) for all food components. Reasons for this include: consistent application to all food components allows valid comparisons between products; food energy values and estimates of energy expenditure (food energy requirements) should be directly comparable; NME does not account for all sources of thermogenesis; differences between ME and NME for sugar alcohols and polydextrose are small in the context of the whole diet; and the ME system does not preclude information about metabolic efficiency being provided as additional information. Any major change to the way in which energy values are expressed (e.g. global adoption of the NME system) merits wide discussion among the human nutrition community. One aim of this present paper is to stimulate this discussion.

  14. Comparative Quantification in Three-Dimensional Cultures reveals Epigenetic Memory and Higher Efficiency Retinogenesis in iPSCs Derived from Differentiated Rod Photoreceptors

    PubMed Central

    Hiler, Daniel; Chen, Xiang; Hazen, Jennifer; Kupriyanov, Sergey; Carroll, Patrick A.; Qu, Chunxu; Xu, Beisi; Johnson, Dianna; Griffiths, Lyra; Frase, Sharon; Rodriguez, Alberto R.; Martin, Greg; Zhang, Jiakun; Jeon, Jongrye; Fan, Yiping; Finkelstein, David; Eisenman, Robert N.; Baldwin, Kristin; Dyer, Michael A.

    2015-01-01

    Summary Cell-based therapies to treat retinal degeneration are now being tested in clinical trials. However, it is not known if the source of stem cells is important for the production of differentiated cells suitable for transplantation. To test this, we generated iPSCs murine rod photoreceptors (r-iPSCs) and scored their ability to make retina using a standardized quantitative protocol called STEM-RET. We discovered that r-iPSCs were more efficient at producing differentiated retina than embryonic stem cells (ESCs) or fibroblast-derived iPSCs (f-iPSCs). Retinae derived from f-iPSCs had a reduction in amacrine cells and other inner nuclear layer cells. Integrated epigenetic analysis showed that DNA methylation contributes to the defects in f-iPSC retinogenesis and that rod specific CTCF insulator protein binding sites may promote retinogenes in r-iPSCs. Taken together, our data suggest that the source of stem cells are important for producing retinal neurons in 3D organ cultures. PMID:26140606

  15. Development of cellulose derivatives as novel enteric coating agents soluble at pH 3.5-4.5 and higher.

    PubMed

    Kokubo, H; Obara, S; Minemura, K; Tanaka, T

    1997-08-01

    Hydroxypropyl methylcellulose (HPMC) was selected as a base polymer to develop novel enteric coating agents for acid protection which can dissolve at pH around 4, and was modified with trimellitic acid or maleic acid at various degrees of substitution. These carboxylic acids have higher dissociation constants and higher solubility in water than the carboxylic acids of existing enteric coating polymers. The synthesized polymers were micronized and dispersed in aqueous medium to determine their pKa values by potentiometric titration. The pH of dissolution and the water vapor permeability of the cast films prepared from organic solutions were also evaluated. Hydroxypropyl methylcellulose trimellitate (HPMCT) showed good acid resistance, and the pH at which it dissolves can be controlled in the range of pH 3.5 to 4.5 by varying the content of trimellityl groups and the methoxyl substitution of the base polymer.

  16. Efficient Cycloreversion Reaction of a Diarylethene Derivative in Higher Excited States Attained by Off-Resonant Simultaneous Two-Photon Absorption.

    PubMed

    Sotome, Hikaru; Nagasaka, Tatsuhiro; Une, Kanako; Okui, Chiaki; Ishibashi, Yukihide; Kamada, Kenji; Kobatake, Seiya; Irie, Masahiro; Miyasaka, Hiroshi

    2017-07-20

    Off-resonant excitation of the closed-ring isomer of a photochromic diarylethene derivative at 730 nm induced the efficient cycloreversion reaction with a yield of ∼20%, while the reaction yield was only 2% under one-photon excitation at 365 nm. Excitation wavelength dependence of the one-photon cycloreversion reaction yield under steady-state irradiation in a wide wavelength range showed that the specific electronic state leading to the large cycloreversion reaction yield, which is originally forbidden in the optical transition but partially allowed owing to the low symmetry of the molecule, is spectrally overlapped with the electronic state accessible by the allowed one-photon optical transition in the UV region. Femtosecond transient absorption spectroscopy also revealed that the off-resonant two-photon excitation preferentially pumped the molecule into the specific state, leading to the 10-fold enhancement of the cycloreversion reaction.

  17. Nonparaxial fractional Bessel and Bessel-Gauss auto-focusing light-sheet pincers and their higher-order spatial derivatives

    NASA Astrophysics Data System (ADS)

    Mitri, F. G.

    2017-05-01

    Nonparaxial fractional electromagnetic Bessel and Bessel-Gauss auto-focusing light-sheet solutions and their spatial derivatives are synthesized stemming from the angular spectrum decomposition in plane waves. The propagation characteristics of these transverse electric-polarized light-sheets are analyzed by computing the radiated component of the incident electric field. Tight bending of the beam along curved trajectories and slit openings are observed, which could offer unique features and potential applications in the development of improved methods and devices in light-sheet tweezers for particle manipulation applications and dynamics in opto-fluidics, particle sizing and imaging to name a few examples. Moreover, computations of the scattering, radiation force and torque, and particle dynamics also benefit from the developed beam solutions.

  18. Adipose Stem Cells Display Higher Regenerative Capacities and More Adaptable Electro-Kinetic Properties Compared to Bone Marrow-Derived Mesenchymal Stromal Cells

    PubMed Central

    El-Badawy, Ahmed; Amer, Marwa; Abdelbaset, Reda; Sherif, Sameh N.; Abo-Elela, Marwan; Ghallab, Yehya H.; Abdelhamid, Hamdy; Ismail, Yehea; El-Badri, Nagwa

    2016-01-01

    Adipose stem cells (ASCs) have recently emerged as a more viable source for clinical applications, compared to bone-marrow mesenchymal stromal cells (BM-MSCs) because of their abundance and easy access. In this study we evaluated the regenerative potency of ASCs compared to BM-MSCs. Furthermore, we compared the dielectric and electro-kinetic properties of both types of cells using a novel Dielectrophoresis (DEP) microfluidic platform based on a printed circuit board (PCB) technology. Our data show that ASCs were more effective than BM-MSCs in promoting neovascularization in an animal model of hind-limb ischemia. When compared to BM-MSCs, ASCs displayed higher resistance to hypoxia-induced apoptosis, and to oxidative stress-induced senescence, and showed more potent proangiogenic activity. mRNA expression analysis showed that ASCs had a higher expression of Oct4 and VEGF than BM-MSCs. Furthermore, ASCs showed a remarkably higher telomerase activity. Analysis of the electro-kinetic properties showed that ASCs displayed different traveling wave velocity and rotational speed compared to BM-MSCs. Interestingly, ASCs seem to develop an adaptive response when exposed to repeated electric field stimulation. These data provide new insights into the physiology of ASCs, and evidence to their potential superior potency compared to marrow MSCs as a source of stem cells. PMID:27883074

  19. Atlas of wide-field-of-view outgoing longwave radiation derived from Nimbus 7 Earth radiation budget data set, November 1985 to October 1987

    NASA Technical Reports Server (NTRS)

    Bess, T. Dale; Smith, G. Louis

    1991-01-01

    An atlas of monthly outgoing longwave radiation global contour maps and associated spherical harmonic coefficients is presented. The atlas contains 23 months of data from November 1985 to October 1987 . The data were derived from the second Earth Radiation Budget (ERB) package, which was flown on the Nimbus 7 Sun-synchronous satellite in 1987. This data set is a companion set and extension to similar atlases that documented 10 years of outgoing longwave radiation results from Nimbus 6 and Nimbus 7 satellites. This atlas and the companion atlases give a data set covering a 12-year time period and will be very useful in studying different aspects of our changing climate. The data set also provides a 3-year overlap with the current Earth Radiation Budget Experiment (ERBE).

  20. Water-soluble metal working fluids additives derived from the esters of acid anhydrides with higher alcohols for aluminum alloy materials.

    PubMed

    Yamamoto, Syutaro; Tomoda, Hideyuki; Watanabe, Shoji

    2007-01-01

    Water-soluble metal working fluids are used for processing of aluminum alloy materials. This short article describes properties of new additives in water-soluble metal working fluids for aluminum alloy materials. Many half esters or diesters were prepared from the reactions of higher alcohols with acid anhydrides. Interestingly, diesters of PTMG (tetrahydrofuran oligomer, MW = 650 and 1000) and polybutylene oxide (MW = 650) with maleic anhydride and succinic anhydride showed both of an excellent anti-corrosion property for aluminum alloy and a good hard water tolerance. The industrial soluble type processing oils including these additives also showed anti-corrosion property and hard water tolerance.

  1. The nature of “internal sensations” of higher brain functions may be derived from the design rules for artificial machines that can produce them

    PubMed Central

    2012-01-01

    Modeling various neuronal functions in search of emergent properties may achieve success when the gold standard of replicating the models in physical systems starts exhibiting some of these properties. Since very large number of functions can be modeled and need testing, we suggest an alternate method of examining higher brain functions: seeing them as internal sensations formed from their hypothetical basic units. Here, we explain the need to replicate the natural mechanism using electronic circuits, discuss some of the technical aspects and introduce some concepts for searching for properties of internal sensations evolving from them. PMID:23126434

  2. X-ray Crystallographic Structure of Oligomers Formed by a Toxic β-Hairpin Derived from α-Synuclein: Trimers and Higher-Order Oligomers.

    PubMed

    Salveson, Patrick J; Spencer, Ryan K; Nowick, James S

    2016-04-06

    Oligomeric assemblies of the protein α-synuclein are thought to cause neurodegeneration in Parkinson's disease and related synucleinopathies. Characterization of α-synuclein oligomers at high resolution is an outstanding challenge in the field of structural biology. The absence of high-resolution structures of oligomers formed by α-synuclein impedes understanding the synucleinopathies at the molecular level. This paper reports the X-ray crystallographic structure of oligomers formed by a peptide derived from residues 36-55 of α-synuclein. The peptide 1a adopts a β-hairpin structure, which assembles in a hierarchical fashion. Three β-hairpins assemble to form a triangular trimer. Three copies of the triangular trimer assemble to form a basket-shaped nonamer. Two nonamers pack to form an octadecamer. Molecular modeling suggests that full-length α-synuclein may also be able to assemble in this fashion. Circular dichroism spectroscopy demonstrates that peptide 1a interacts with anionic lipid bilayer membranes, like oligomers of full-length α-synuclein. LDH and MTT assays demonstrate that peptide 1a is toxic toward SH-SY5Y cells. Comparison of peptide 1a to homologues suggests that this toxicity results from nonspecific interactions with the cell membrane. The oligomers formed by peptide 1a are fundamentally different than the proposed models of the fibrils formed by α-synuclein and suggest that α-Syn36-55, rather than the NAC, may nucleate oligomer formation.

  3. PcpA promotes higher levels of infection and modulates recruitment of myeloid-derived suppressor cells during pneumococcal pneumonia.1

    PubMed Central

    Walker, Melissa M.; Novak, Lea; Widener, Rebecca; Grubbs, James Aaron; King, Janice; Hale, Joanetha Y.; Ochs, Martina M.; Myers, Lisa E.; Briles, David E.; Deshane, Jessy

    2016-01-01

    We used two different infection models to investigate the kinetics of the PcpA-dependent pneumococcal disease in mice. In a bacteremic pneumonia model, we observed a PcpA-dependent increase in bacterial burden in the lungs, blood, liver, BAL and spleens of mice at 24-hrs post infection. This PcpA-dependent effect on bacterial burden appeared earlier (within 12-hrs) in the focal-pneumonia model, which lacks bacteremia or sepsis. Histological changes show that the ability of pneumococci to make PcpA was associated with unresolved inflammation in both models of infection. Using our bacteremic pneumonia model we further investigated the effects of PcpA on recruitment of innate immune regulatory cells. The presence of PcpA was associated with increased IL-6 levels, suppressed production of TNF-related apoptosis - inducing ligand (TRAIL) and reduced infiltration of polymorphonuclear cells. The ability of pneumococci to make PcpA negatively modulated both the infiltration and apoptosis of macrophages and the recruitment of myeloid-derived suppressor-like cells (MDSCs). The latter have been shown to facilitate clearance and control of bacterial pneumonia. Taken together, the ability to make PcpA was strongly associated with increased bacterial burden, inflammation and negative regulation of innate immune cell recruitment to the lung tissue during bacteremic pneumonia. PMID:26829988

  4. Associated factors for higher lead and cadmium blood levels, and reference values derived from general population of São Paulo, Brazil.

    PubMed

    Kira, Carmen Silvia; Sakuma, Alice Momoyo; De Capitani, Eduardo Mello; de Freitas, Clarice Umbelino; Cardoso, Maria Regina Alves; Gouveia, Nelson

    2016-02-01

    Human activities are associated with emissions of various metals into the environment, among which the heavy metals lead and cadmium stand out, as they pose a risk to human life even at low concentrations. Thus, accurate knowledge of the levels of these metals exhibited by the overall population, including children, is important. The aim of this study was to estimate the concentrations of lead and cadmium in the blood of adults, adolescents and children residing in the city of São Paulo, assess factors associated with higher lead and cadmium blood levels, and to establish reference values for this population. The study sample consisted of 669 adults over 20 years old, 264 adolescents aged 12 to 19 years old and 391 children under 11 years old from both genders. The samples were collected at the end of 2007 and during 2008 in different city zones. Higher blood lead concentration was significantly associated with gender, smoking, offal intake, area of residence and age. The blood cadmium concentration was significantly associated with gender, smoking, consumption of distilled beverages and age. The reference values of lead and cadmium established for adults above 20 years old were 33 μg/L and 0.6 μg/L, respectively, for adolescents (12 to 19 years old) were 31 μg/L and 0.6 μg/L, respectively and for children under 11 years old were 29 μg/L and 0.2 μg/L, respectively. The results of this study indicate that the exposure levels of the investigated population to lead and cadmium are low.

  5. A Dynamic Model of pH-Induced Protein G'e Higher Order Structure Changes derived from Mass Spectrometric Analyses.

    PubMed

    Yefremova, Yelena; Al-Majdoub, Mahmoud; Opuni, Kwabena F M; Koy, Cornelia; Yan, Yuetian; Gross, Michael L; Glocker, Michael O

    2016-01-05

    To obtain insight into pH change-driven molecular dynamics, we studied the higher order structure changes of protein G'e at the molecular and amino acid residue levels in solution by using nanoESI- and IM-mass spectrometry, CD spectroscopy, and protein chemical modification reactions (protein footprinting). We found a dramatic change of the overall tertiary structure of protein G'e when the pH was changed from neutral to acidic, whereas its secondary structure features remained nearly invariable. Limited proteolysis and surface-topology mapping of protein G'e by fast photochemical oxidation of proteins (FPOP) under neutral and acidic conditions reveal areas where higher order conformational changes occur on the amino-acid residue level. Under neutral solution conditions, lower oxidation occurs for residues of the first linker region, whereas greater oxidative modifications occur for amino-acid residues of the IgG-binding domains I and II. We propose a dynamic model of pH-induced structural changes in which protein G'e at neutral pH adopts an overall tight conformation with all four domains packed in a firm assembly, whereas at acidic pH, the three IgG-binding domains form an elongated alignment, and the N-terminal, His-tag-carrying domain unfolds. At the same time the individual IgG-binding domains themselves seem to adopt a more compacted fold. As the secondary structure features are nearly unchanged at either pH, interchange between both conformations is highly reversible, explaining the high reconditioning power of protein G'e-based affinity chromatography columns.

  6. Development and characterization of BAC-end sequence derived SSRs, and their incorporation into a new higher density genetic map for cultivated peanut (Arachis hypogaea L.)

    PubMed Central

    2012-01-01

    Background Cultivated peanut (Arachis hypogaea L.) is an important crop worldwide, valued for its edible oil and digestible protein. It has a very narrow genetic base that may well derive from a relatively recent single polyploidization event. Accordingly molecular markers have low levels of polymorphism and the number of polymorphic molecular markers available for cultivated peanut is still limiting. Results Here, we report a large set of BAC-end sequences (BES), use them for developing SSR (BES-SSR) markers, and apply them in genetic linkage mapping. The majority of BESs had no detectable homology to known genes (49.5%) followed by sequences with similarity to known genes (44.3%), and miscellaneous sequences (6.2%) such as transposable element, retroelement, and organelle sequences. A total of 1,424 SSRs were identified from 36,435 BESs. Among these identified SSRs, dinucleotide (47.4%) and trinucleotide (37.1%) SSRs were predominant. The new set of 1,152 SSRs as well as about 4,000 published or unpublished SSRs were screened against two parents of a mapping population, generating 385 polymorphic loci. A genetic linkage map was constructed, consisting of 318 loci onto 21 linkage groups and covering a total of 1,674.4 cM, with an average distance of 5.3 cM between adjacent loci. Two markers related to resistance gene homologs (RGH) were mapped to two different groups, thus anchoring 1 RGH-BAC contig and 1 singleton. Conclusions The SSRs mined from BESs will be of use in further molecular analysis of the peanut genome, providing a novel set of markers, genetically anchoring BAC clones, and incorporating gene sequences into a linkage map. This will aid in the identification of markers linked to genes of interest and map-based cloning. PMID:22260238

  7. Application of a higher throughput approach to derive apparent Michaelis-Menten constants of isoform-selective p450-mediated biotransformation reactions in human hepatocytes.

    PubMed

    Li, Albert P; Schlicht, Kari E

    2014-01-01

    A higher throughput platform was developed for the determination of K(M) values for isoformselective P450 substrates in human hepatocytes via incubation of the hepatocytes with substrates in 384- well plates and metabolite quantification by RapidFire™ mass spectrometry. Isoform-selective P450 substrates were incubated at 8 concentrations in triplicate with cryopreserved human hepatocytes from 16 donors. The metabolic pathways examined were the CYP1A2-catalyzed tacrine 1-hydroxylation, CYP2B6-catalyzed bupropion hydroxylation, CYP2C8-catalyzed amodiaquine N-deethylation, CYP2C9- catalyzed diclofenac 4'-hydroxylation, CYP2D6-catalyzed dextromethorphan O-demethylation, and CYP3A4-catalyzed midazolam 1'-hydroxylation. Typical saturation enzyme kinetics was observed for all the pathways evaluated. Individual differences in the apparent V(max) and K(M) values were observed among the human hepatocytes from each of the 16 individual donors, with no statistically significant gender- or age-associated differences. A "composite" K(M) value was calculated for each of the pathways via normalizing the individual activities to their respective V(max) values to develop "relative activities" followed by Michaelis-Menten analysis of the mean relative activities of the 16 donors at each of the 8 substrate concentrations. The resulting "composite" K(M) values for the P450 substrates may be used to guide in vitro P450 inhibition and induction studies and kinetic modeling of in vivo drug-drug interaction.

  8. Afrocentricity: Implications for Higher Education.

    ERIC Educational Resources Information Center

    Schiele, Jerome H.

    1994-01-01

    Discusses some ideas about how Afrocentricity can be promoted and integrated in institutions of higher education in the United States. It argues that Afrocentricity offers an alternative to the more dominant Eurocentric view found in higher education and the world and states that the Eurocentric view subscribes to itself exclusive rights to…

  9. Higher serum concentrations of betaine rather than choline is associated with better profiles of DXA-derived body fat and fat distribution in Chinese adults.

    PubMed

    Chen, Y-M; Liu, Y; Liu, Y-H; Wang, X; Guan, K; Zhu, H-L

    2015-03-01

    Animal studies have suggested that betaine, but not choline, may improve body composition, but little evidence is available in humans. We examined the association of serum concentrations of choline and betaine with body composition and fat distribution in adults. This community-based study recruited 1996 adults (women/men: 1380/616) aged 40-75 years in urban Guangzhou, China. General information and anthropometric measurements were taken, and serum choline and betaine levels were assessed by high-performance liquid chromatography-tandem mass spectrometry between July 2008 and June 2010. After 3.2 years, 1623 of the 1996 participants were measured for fat mass (FM and %FM) over the total body (TB), trunk, limbs, android (A) and gynoid (G) regions. The %FM ratios of the A/G regions and the trunk and limbs were determined by dual energy X-ray absorptiometry. Univariate analyses showed that higher serum betaine levels were significantly associated with lower values of adiposity indices (all P-trends<0.05), except in the case of the %FM at the gynoid area. After adjusting for potential covariates, similar associations were observed. The mean percentage differences between quartiles 4 and 1 of the serum betaine levels were -4.9% (weight), -4.7% (body mass index, BMI), -2.5% (waist circumference), -7.9% (TB FM) and -3.4% (TB %FM). The mean differences in the FM and %FM were much more pronounced at the trunk (-10.0 and -4.5%) or android areas (-10.7 and -4.7%) than those at the limbs (-0.8 and -2.3%) or gynoid areas (-0.6 and -1.4%). Such favorable associations were stronger in men than in women. No significant associations between serum choline and the adiposity indices were observed, except in the cases of body weight and BMI. Greater circulating betaine, but not choline, was dose-dependently associated with better body composition and fat distribution due to a lower FM in the trunk regions in this population.

  10. Systematic studies of molecular vibrational anharmonicity and vibration-rotation interaction by self-consistent-field higher derivative methods: Applications to asymmetric and symmetric top and linear polyatomic molecules

    SciTech Connect

    Clabo, D.A. Jr.

    1987-04-01

    Inclusion of the anharmonicity normal mode vibrations (i.e., the third and fourth (and higher) derivatives of a molecular Born-Oppenheimer potential energy surface) is necessary in order to theoretically reproduce experimental fundamental vibrational frequencies of a molecule. Although ab initio determinations of harmonic vibrational frequencies may give errors of only a few percent by the inclusion of electron correlation within a large basis set for small molecules, in general, molecular fundamental vibrational frequencies are more often available from high resolution vibration-rotation spectra. Recently developed analytic third derivatives methods for self-consistent-field (SCF) wavefunctions have made it possible to examine with previously unavailable accuracy and computational efficiency the anharmonic force fields of small molecules.

  11. Subcultural Experience and Television Viewing.

    ERIC Educational Resources Information Center

    Matabane, Paula

    This study examines two concepts--the relationship between different types of television viewing as evidence of viewer selectivity, and the structural relationships between television viewing and experiences derived from a subculture and location in the social structure. A review of the way mainstream research has characterized the viewing…

  12. Evaluation of expressions involving higher order derivations

    NASA Technical Reports Server (NTRS)

    Grossman, Robert

    1990-01-01

    The local geometric properties of a nonlinear control system defined by vector fields E(sub 1),..., E(sub M) are determined by the algebraic properties of the iterated Lie brackets of the E(sub j)'s. The problem of rewriting expressions is examined involving the E(sub j)'s in terms of the D(sub mu)'s in such a way as to handle effectively any cancellation occurring due to commuting of the D(sub mu)'s. A data structure is introduced which allows us to organize the computation to take advantage of the symmetries in the expression and reduce the operation count.

  13. Liberty and Higher Education.

    ERIC Educational Resources Information Center

    Thompson, Dennis F.

    1989-01-01

    John Stuart Mill's principle of liberty is discussed with the view that it needs to be revised to guide moral judgments in higher education. Three key elements need to be modified: the action that is constrained; the constraint on the action; and the agent whose action is constrained. (MLW)

  14. Liberty and Higher Education.

    ERIC Educational Resources Information Center

    Thompson, Dennis F.

    1989-01-01

    John Stuart Mill's principle of liberty is discussed with the view that it needs to be revised to guide moral judgments in higher education. Three key elements need to be modified: the action that is constrained; the constraint on the action; and the agent whose action is constrained. (MLW)

  15. Capturing a synergistic effect of a conical push and an inward pull in fluoro derivatives of Li@B10H14 basket: toward a higher vertical ionization potential and nonlinear optical response.

    PubMed

    Muhammad, Shabbir; Xu, Hongliang; Su, Zhongmin

    2011-02-10

    We present the design of fluoro derivatives of B(10)H(14) and Li@B(10)H(14) baskets. A synergistic effect of conical push and inward pull (reported independently in previous lithium nonlinear optical (NLO) complexes) has been explored in these derivatives to achieve a robustly large NLO response and a higher vertical ionization potential. Li@1,3,6,9-F(4)B(10)H(10), Li@6,9-F(2)B(10)H(12), and Li@2,4,6,9-F(4)B(10)H(10) exhibit first hyperpolarizability (β(0)) values as large as 181 624, 133 199, and 32 314 au; their vertical ionization potentials are 6.45, 6.30, and 6.78 eV, respectively. These values are significantly higher than those previously reported in Li-doped fluorocarbon chains at the same MP2/6-31+G* level of theory (Xu, H. L.; Li, Z. R.; Wu, D.; Wang, B. Q.; Li, Y.; Gu, F. L.; Aoki, Y. J. Am. Chem. Soc. 2007, 129, 2967). They also exceed those from our earlier designed Li@B(10)H(14) basket (Muhammad, S.; Xu, H. L.; Liao, Y.; Kan, Y. H.; Su , Z. M. J. Am. Chem. Soc. 2009, 131, 2967). In addition, new quantum chemical calculations of enthalpies of reaction (Δ(r)H°) at 298 K for B(10)H(14) and its lithium/fluoro derivatives highlight the changes in their thermodynamical aspects. The calculated enthalpies of lithiation reactions are -10.04, -11.29, and -13.18 kcal/mol for B(10)H(14), 6,9-F(2)B(10)H(12), and 2,4-F(2)B(10)H(12), respectively, demonstrating a higher probability of fluoro decaboranes for reaction with lithium. The obtained results not only explain the effect of position and number dependence of substituted fluoro atom(s) in B(10)H(14) and Li@B(10)H(14) but also elucidate a synergistic behavior to polarize a lithium excess electron for high NLO responses and vertical ionization potentials.

  16. Immersive viewing engine

    NASA Astrophysics Data System (ADS)

    Schonlau, William J.

    2006-05-01

    An immersive viewing engine providing basic telepresence functionality for a variety of application types is presented. Augmented reality, teleoperation and virtual reality applications all benefit from the use of head mounted display devices that present imagery appropriate to the user's head orientation at full frame rates. Our primary application is the viewing of remote environments, as with a camera equipped teleoperated vehicle. The conventional approach where imagery from a narrow field camera onboard the vehicle is presented to the user on a small rectangular screen is contrasted with an immersive viewing system where a cylindrical or spherical format image is received from a panoramic camera on the vehicle, resampled in response to sensed user head orientation and presented via wide field eyewear display, approaching 180 degrees of horizontal field. Of primary interest is the user's enhanced ability to perceive and understand image content, even when image resolution parameters are poor, due to the innate visual integration and 3-D model generation capabilities of the human visual system. A mathematical model for tracking user head position and resampling the panoramic image to attain distortion free viewing of the region appropriate to the user's current head pose is presented and consideration is given to providing the user with stereo viewing generated from depth map information derived using stereo from motion algorithms.

  17. Cultural Capital and Agency: Connecting Critique and Curriculum in Higher Education

    ERIC Educational Resources Information Center

    Clegg, Sue

    2011-01-01

    This paper explores some of the unresolved tensions in higher education systems and the contradiction between widening participation and the consolidation of social position. It shows how concepts of capital derived from Bourdieu, Coleman and Putnam provide a powerful basis for critique, but risk a deficit view of students from less privileged…

  18. Higher frequencies of GARP(+)CTLA-4(+)Foxp3(+) T regulatory cells and myeloid-derived suppressor cells in hepatocellular carcinoma patients are associated with impaired T-cell functionality.

    PubMed

    Kalathil, Suresh; Lugade, Amit A; Miller, Austin; Iyer, Renuka; Thanavala, Yasmin

    2013-04-15

    The extent to which T-cell-mediated immune surveillance is impaired in human cancer remains a question of major importance, given its potential impact on the development of generalized treatments of advanced disease where the highest degree of heterogeneity exists. Here, we report the first global analysis of immune dysfunction in patients with advanced hepatocellular carcinoma (HCC). Using multi-parameter fluorescence-activated cell sorting analysis, we quantified the cumulative frequency of regulatory T cells (Treg), exhausted CD4(+) helper T cells, and myeloid-derived suppressor cells (MDSC) to gain concurrent views on the overall level of immune dysfunction in these inoperable patients. We documented augmented numbers of Tregs, MDSC, PD-1(+)-exhausted T cells, and increased levels of immunosuppressive cytokines in patients with HCC, compared with normal controls, revealing a network of potential mechanisms of immune dysregulation in patients with HCC. In dampening T-cell-mediated antitumor immunity, we hypothesized that these processes may facilitate HCC progression and thwart the efficacy of immunotherapeutic interventions. In testing this hypothesis, we showed that combined regimens to deplete Tregs, MDSC, and PD-1(+) T cells in patients with advanced HCC restored production of granzyme B by CD8(+) T cells, reaching levels observed in normal controls and also modestly increased the number of IFN-γ producing CD4(+) T cells. These clinical findings encourage efforts to restore T-cell function in patients with advanced stage disease by highlighting combined approaches to deplete endogenous suppressor cell populations that can also expand effector T-cell populations.

  19. Pilot-scale whole-cell biocatalysis for the hydroxylation of cyclosporine derivative, FR901459, at higher concentrations by Lentzea sp. 7887 using soybean flour as a novel substrate dispersant.

    PubMed

    Yabutani, Tetsuya; Shimizu, Shiho; Nakano, Hideo

    2017-01-01

    Pilot-scale hydroxylation of FR901459, an immunosuppressive cyclosporine derivative, was performed using resting cells of a Gram-positive bacteria Lentzea sp. 7887 (as whole-cell biocatalysts) and soybean flour as a substrate dispersant. Through biocatalysis, FR901459 was hydroxylated at position 9, producing AS1837812, an important intermediate in the production of drug candidates against hepatitis C. Since FR901459 is insoluble in water, the conversion ratio ([moles of AS1837812 produced/moles of FR901459 added]×100) of the biocatalysis decreased under conditions with substrate concentrations higher than 0.615 mM. To increase the concentration of FR901459 for biocatalysis, we screened various materials to effectively disperse FR901459 in the biocatalysis mixture and found that soybean flour was the best substrate dispersant. The addition of soybean flour to the biocatalysis mixture increased the FR901459 concentration in a 3-L reactor up to 3-fold (1.85 mM). Thus, we successfully established a pilot-scale (1-m(3)) biocatalysis with a 2-fold higher concentration (1.23 mM) of FR901459 using soybean flour as the substrate dispersant and obtained 419 g of AS1837812 at a conversion ratio of 34.5% in a 28-h batch reaction. Soybean flour can be used as a substrate dispersant for various industrial biocatalysis processes because of its low cost, high availability, and low environmental impact.

  20. Derivative chameleons

    NASA Astrophysics Data System (ADS)

    Noller, Johannes

    2012-07-01

    We consider generalized chameleon models where the conformal coupling between matter and gravitational geometries is not only a function of the chameleon field phi, but also of its derivatives via higher order co-ordinate invariants (such as ∂μphi∂μphi,squphi,...). Specifically we consider the first such non-trivial conformal factor A(phi,∂μphi∂μphi). The associated phenomenology is investigated and we show that such theories have a new generic mass-altering mechanism, potentially assisting the generation of a sufficiently large chameleon mass in dense environments. The most general effective potential is derived for such derivative chameleon setups and explicit examples are given. Interestingly this points us to the existence of a purely derivative chameleon protected by a shift symmetry for phi → phi+c. We also discuss potential ghost-like instabilities associated with mass-lifting mechanisms and find another, mass-lowering and instability-free, branch of solutions. This suggests that, barring fine-tuning, stable derivative models are in fact typically anti-chameleons that suppress the field's mass in dense environments. Furthermore we investigate modifications to the thin-shell regime and prove a no-go theorem for chameleon effects in non-conformal geometries of the disformal type.

  1. Derivative chameleons

    SciTech Connect

    Noller, Johannes

    2012-07-01

    We consider generalized chameleon models where the conformal coupling between matter and gravitational geometries is not only a function of the chameleon field φ, but also of its derivatives via higher order co-ordinate invariants (such as ∂{sub μ}φ∂{sup μ}φ,□φ,...). Specifically we consider the first such non-trivial conformal factor A(φ,∂{sub μ}φ∂{sup μ}φ). The associated phenomenology is investigated and we show that such theories have a new generic mass-altering mechanism, potentially assisting the generation of a sufficiently large chameleon mass in dense environments. The most general effective potential is derived for such derivative chameleon setups and explicit examples are given. Interestingly this points us to the existence of a purely derivative chameleon protected by a shift symmetry for φ → φ+c. We also discuss potential ghost-like instabilities associated with mass-lifting mechanisms and find another, mass-lowering and instability-free, branch of solutions. This suggests that, barring fine-tuning, stable derivative models are in fact typically anti-chameleons that suppress the field's mass in dense environments. Furthermore we investigate modifications to the thin-shell regime and prove a no-go theorem for chameleon effects in non-conformal geometries of the disformal type.

  2. Proteomic analysis of porcine mesenchymal stem cells derived from bone marrow and umbilical cord: implication of the proteins involved in the higher migration capability of bone marrow mesenchymal stem cells.

    PubMed

    Huang, Lei; Niu, Chenguang; Willard, Belinda; Zhao, Weimin; Liu, Lan; He, Wei; Wu, Tianwen; Yang, Shulin; Feng, Shutang; Mu, Yulian; Zheng, Lemin; Li, Kui

    2015-04-15

    Mesenchymal stem cells (MSCs) have the ability to proliferate in vivo with a large variety of differentiation potentials and therefore are widely used as an ideal material for cell therapy. MSCs derived from pig and human sources are similar in many aspects, such as cell immunophenotype and functional characteristics. However, differences in proteomics and the molecular mechanisms of cell functions between porcine bone marrow MSCs (BM-MSCs) and umbilical cord MSCs (UC-MSCs) are largely unknown. To the best of our knowledge, MSCs collected from different tissue have specific phenotype and differentiation ability in response to microenvironment, known as a niche. Porcine BM-MSCs and UC-MSCs were evaluated with flow cytometric and adipogenic and osteogenic differentiation analyses. We used isobaric tagging for relative and absolute quantitation (iTRAQ), combined with liquid chromatography-tandem mass spectrometry, to identify differentially expressed proteins (DEPs) between these two types of MSCs. Kyoto Encyclopedia of Genes and Genomes pathway and phenotype analyses were used to understand the links between cell migration ability and DEPs. Two separate iTRAQ experiments were conducted, identifying 95 DEPs (95% confidence interval). Five of these proteins were verified by Western blotting. These 95 DEPs were classified in terms of biological regulation, metabolic process, developmental process, immune system process, reproduction, death, growth, signaling, localization, response to stimulus, biological adhesion, and cellular component organization. Our study is the first to show results indicating that porcine BM-MSCs have a higher migration capability than UC-MSCs. Finally, one of the DEPs, Vimentin, was verified to have a positive role in MSC migration. These results represent the first attempt to use proteomics specifically targeted to porcine MSCs of different tissues. The identified components should help reveal a variety of tissue-specific functions in tissue-derived

  3. Zograscopic viewing

    PubMed Central

    Koenderink, Jan; Wijntjes, Maarten; van Doorn, Andrea

    2013-01-01

    The “zograscope” is a “visual aid” (commonly known as “optical machine” in the 18th century) invented in the mid-18th century, and in general use until the early 20th century. It was intended to view single pictures (thus not stereographic pairs) with both eyes. The optics approximately eliminates the physiological cues (binocular disparity, vergence, accommodation, movement parallax, and image blur) that might indicate the flatness of the picture surface. The spatial structure of pictorial space is due to the remaining pictorial cues. As a consequence, many (or perhaps most) observers are aware of a heightened “plasticity” of the pictorial content for zograscopic as compared with natural viewing. We discuss the optics of the zograscope in some detail. Such an analysis is not available in the literature, whereas common “explanations” of the apparatus are evidently nonsensical. We constructed a zograscope, using modern parts, and present psychophysical data on its performance. PMID:23799196

  4. Mixed views of biotech

    SciTech Connect

    Crawford, M.

    1987-06-05

    Public Perceptions of Biotechnology is the second of a series of reports entitled New Developments in Biotechnology. This latest study is based on interviews with 1273 American adults and has a margin of error of 2 to 3%. Participants were queried on their attitudes toward science and the environment, as well as on matters directly related to biotechnology. Whereas public interest in science has eroded slightly, there is increased optimism about the benefits to be derived from science. Some 62% of the sample thought the benefits will outweigh the risks, whereas in 1980 a Harris survey indicated that only 58% of the country held this view.

  5. Higher Education.

    ERIC Educational Resources Information Center

    Hendrickson, Robert M.

    Litigation in 1987 was very brisk with an increase in the number of higher education cases reviewed. Cases discussed in this chapter are organized under four major topics: (1) intergovernmental relations; (2) employees, involving discrimination claims, tenured and nontenured faculty, collective bargaining and denial of employee benefits; (3)…

  6. Higher Education.

    ERIC Educational Resources Information Center

    Hendrickson, Robert M.; Finnegan, Dorothy E.

    The higher education case law in 1988 is extensive. Cases discussed in this chapter are organized under five major topics: (1) intergovernmental relations; (2) employees, involving discrimination claims, tenured and nontenured faculty, collective bargaining, and denial of employee benefits; (3) students, involving admissions, financial aid, First…

  7. Higher Education.

    ERIC Educational Resources Information Center

    Hendrickson, Robert M.; Finnegan, Dorothy E.

    Themes in 1989 higher education case law reflect the difficulty in reducing the federal deficit, increased service demands on state budgets, and an economic condition of marginal growth. The interpretation of constitutional rights in relationships between the institution and students, employees, and communities continues to be heavily litigated.…

  8. Higher Education.

    ERIC Educational Resources Information Center

    Knowles, Laurence W.; Wedlock, Eldon D., Jr.

    Courts have been consistently reluctant to interfere with governing boards' powers to control the administration of institutions of higher education. This deference seems to be based on the belief that board expertise makes it significantly more qualified than are the courts to make the necessary administrative decisions. Uncritical deference by…

  9. Higher Education.

    ERIC Educational Resources Information Center

    Hendrickson, Robert M.; Gregory, Dennis E.

    Decisions made by federal and state courts during 1983 concerning higher education are reported in this chapter. Issues of employment and the treatment of students underlay the bulk of the litigation. Specific topics addressed in these and other cases included federal authority to enforce regulations against age discrimination and to revoke an…

  10. Higher Education.

    ERIC Educational Resources Information Center

    Hendrickson, Robert M.; Gregory, Dennis E.

    Decisions made by federal and state courts during 1983 concerning higher education are reported in this chapter. Issues of employment and the treatment of students underlay the bulk of the litigation. Specific topics addressed in these and other cases included federal authority to enforce regulations against age discrimination and to revoke an…

  11. Exploring Leaders' Views on the Influence of Applied A Levels and Vocational Education on Preparation for Students' Progression to Higher Education and Employment, in the Context of an Inner City London School

    ERIC Educational Resources Information Center

    Garforth, Graham

    2011-01-01

    In London particularly there is increasing competitiveness for jobs and a need for transferable tertiary industry skills. There has been decades of change in vocational education and training; but there is evidence that little has changed to improve the chances of students progression to higher education and employment. With the age that students…

  12. College Management--A Principal's Eye View [and] The Future of Further and Higher Education. A Report on the Proceedings of the Annual Meeting of the Association of Vice Principals of Colleges (England, June 11, 1982).

    ERIC Educational Resources Information Center

    Clarke, Peter; Shelton, William

    Proceedings of the 1982 annual meeting of the Association of Vice Principals of Colleges in England are presented. In "The Future of Further and Higher Education," William Shelton discusses vocational preparation and the Manpower Services Commission (MSC), faculty development, the new 17+ Qualification or Certificate of Pre-Vocational…

  13. International Conference of States with a View to Adoption of the Regional Convention on the Recognition of Studies, Diplomas and Degrees in Higher Education in Asia and the Pacific (Bangkok, Thailand, December 12-16, 1983). Final Report.

    ERIC Educational Resources Information Center

    United Nations Educational, Scientific, and Cultural Organization, Bangkok (Thailand).

    Proceedings of a 1983 International Conference of states sponsored by the United Nations Educational, Scientific, and Cultural Organization (UNESCO) are presented. The focus was the adoption of the Regional Convention on the Recognition of Studies, Diplomas, and Degrees in Higher Education in Asia and the Pacific. Emphasis was placed on the…

  14. Canuck-Do Higher Education.

    ERIC Educational Resources Information Center

    Rosenfeld, Mark

    2003-01-01

    Discusses how, like Australia, Canadian higher education has experienced large-scale cuts in government funding, the deregulation of tuition and general cost shifting to students, inability to accommodate increased student demand, faculty "brain drain" and shortages, and an erosion of public policy toward viewing higher education as a…

  15. Funding Higher Education: Student Perspectives.

    ERIC Educational Resources Information Center

    Mason, Selena; Harvey, Lee

    This report documents the results of a survey of 1,139 students at the University of Central England (UCE) in Birmingham in regard to their financial circumstances and their views on the funding of higher education. The report also examines the advantages and disadvantages of six specific higher education funding proposals put forth in recent…

  16. ​Parcel feature data derived from Google Street View images for urban land use classification in Brooklyn, New York Cityfor urban land use classification in Brooklyn, New York Cityretain-->.

    PubMed

    Zhang, Weixing; Li, Weidong; Zhang, Chuanrong; Hanink, Dean M; Li, Xiaojiang; Wang, Wenjie

    2017-06-01

    Google Street View (GSV) was used for urban land use classification, together with airborne light detection and ranging (LiDAR) data and high resolution orthoimagery, by a parcel-based method. In this data article, we present the input raw GSV images, intermediate products of GSV images, and final urban land use classification data that are related to our research article "Parcel-based urban land use classification in megacity using airborne LiDAR, high resolution orthoimagery, and Google Street View" (Zhang et al., 2017) [1]. More detail about other used data and our findings can be found in Zhang et al. (2017) [1].

  17. Multiple Views

    NASA Image and Video Library

    2017-09-28

    , mission, which launched in 2006. The two STEREO spacecraft are both currently viewing the far side of the sun. Together these instruments help scientists create a three-dimensional model of any CME as its journey unfolds through interplanetary space. Such information can show why a given characteristic of a CME close to the sun might lead to a given effect near Earth, or any other planet in the solar system...NASA image use policy. NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. Follow us on Twitter Like us on Facebook Find us on Instagram

  18. STEREO's View

    NASA Image and Video Library

    2017-09-28

    currently viewing the far side of the sun. Together these instruments help scientists create a three-dimensional model of any CME as its journey unfolds through interplanetary space. Such information can show why a given characteristic of a CME close to the sun might lead to a given effect near Earth, or any other planet in the solar system. NASA image use policy. NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. Follow us on Twitter Like us on Facebook Find us on Instagram

  19. Student Influence and Higher Education.

    ERIC Educational Resources Information Center

    Juola, Arvo E.

    Since 1965, student views and feelings have influenced great changes in higher education, sometimes to the detriment of long-term interests in academic institutions and colleges. One conspicuous recent trend is the desire of college students for more influence, impact, or power. Other prevalent attitudes may be characterized as a desire to be…

  20. Rethinking Higher Education Capital Finance.

    ERIC Educational Resources Information Center

    King, George A.

    1988-01-01

    Capital finance in institutions of higher education is analyzed in light of changes in the Tax Reform Act of 1986 affecting the ability of institutions to finance capital projects and the likelihood of changes in the government's view of tax-exempt financing. The options for colleges and universities are analyzed in the following areas: (1)…

  1. Rethinking Higher Education Capital Finance.

    ERIC Educational Resources Information Center

    King, George A.

    1988-01-01

    Capital finance in institutions of higher education is analyzed in light of changes in the Tax Reform Act of 1986 affecting the ability of institutions to finance capital projects and the likelihood of changes in the government's view of tax-exempt financing. The options for colleges and universities are analyzed in the following areas: (1)…

  2. Student Influence and Higher Education.

    ERIC Educational Resources Information Center

    Juola, Arvo E.

    Since 1965, student views and feelings have influenced great changes in higher education, sometimes to the detriment of long-term interests in academic institutions and colleges. One conspicuous recent trend is the desire of college students for more influence, impact, or power. Other prevalent attitudes may be characterized as a desire to be…

  3. Semistrict higher gauge theory

    NASA Astrophysics Data System (ADS)

    Jurčo, Branislav; Sämann, Christian; Wolf, Martin

    2015-04-01

    We develop semistrict higher gauge theory from first principles. In particular, we describe the differential Deligne cohomology underlying semistrict principal 2-bundles with connective structures. Principal 2-bundles are obtained in terms of weak 2-functors from the Čech groupoid to weak Lie 2-groups. As is demonstrated, some of these Lie 2-groups can be differentiated to semistrict Lie 2-algebras by a method due to Ševera. We further derive the full description of connective structures on semistrict principal 2-bundles including the non-linear gauge transformations. As an application, we use a twistor construction to derive superconformal constraint equations in six dimensions for a non-Abelian tensor multiplet taking values in a semistrict Lie 2-algebra.

  4. Prevalence, Motives, and Views of Academic Dishonesty in Higher Education

    ERIC Educational Resources Information Center

    Balbuena, Sherwin E.; Lamela, Renee A.

    2015-01-01

    Academic dishonesty in educational institutions is a cause for concern at present. In this paper, the prevalence and severity of various types of dishonest academic behaviors were determined based on the experiences and perceptions of college students. Self-reports on reasons for engaging in a type of cheating or plagiarism were also collected and…

  5. The Equal Pay Act: Higher Education and the Court's View.

    ERIC Educational Resources Information Center

    Greenlaw, Paul S.; Swanson, Austin D.

    1994-01-01

    Effects of the Equal Pay Act of 1963 for college and university employees are reviewed through an examination of trends in court decisions and legal treatment of the issues. It is concluded that case law has been evolutionary, with concepts of "equal,""work," and others not altered drastically by the courts in recent years.…

  6. A Higher View of the Man-Woman Problem

    ERIC Educational Resources Information Center

    Assagioli, Roberto; Servan-Schreiber, Claude

    1977-01-01

    We cannot accurately speak of women and men in general. Each one of us is a human being before being 'man' or 'woman.' And each one of us, man or woman, has roles and functions to fulfill, individually, inter-individually and socially. Here is where the differences begin. These are most emphatically not differences in value, only differences in…

  7. View Combination: A Generalization Mechanism for Visual Recognition

    ERIC Educational Resources Information Center

    Friedman, Alinda; Waller, David; Thrash, Tyler; Greenauer, Nathan; Hodgson, Eric

    2011-01-01

    We examined whether view combination mechanisms shown to underlie object and scene recognition can integrate visual information across views that have little or no three-dimensional information at either the object or scene level. In three experiments, people learned four "views" of a two dimensional visual array derived from a three-dimensional…

  8. Hemoglobin derivatives

    MedlinePlus

    ... this page: //medlineplus.gov/ency/article/003371.htm Hemoglobin derivatives To use the sharing features on this page, please enable JavaScript. Hemoglobin derivatives are altered forms of hemoglobin . Hemoglobin is ...

  9. Branding Canadian Higher Education. CBIE Research

    ERIC Educational Resources Information Center

    Kizilbash, Zainab

    2011-01-01

    The branding of national higher education systems is a global trend that has become increasingly common over the last decade. One of the main motives driving this trend is the view that branding a national higher education system will increase that country's market share of international students. This is evident as national higher education…

  10. Does object view influence the scene consistency effect?

    PubMed

    Sastyin, Gergo; Niimi, Ryosuke; Yokosawa, Kazuhiko

    2015-04-01

    Traditional research on the scene consistency effect only used clearly recognizable object stimuli to show mutually interactive context effects for both the object and background components on scene perception (Davenport & Potter in Psychological Science, 15, 559-564, 2004). However, in real environments, objects are viewed from multiple viewpoints, including an accidental, hard-to-recognize one. When the observers named target objects in scenes (Experiments 1a and 1b, object recognition task), we replicated the scene consistency effect (i.e., there was higher accuracy for the objects with consistent backgrounds). However, there was a significant interaction effect between consistency and object viewpoint, which indicated that the scene consistency effect was more important for identifying objects in the accidental view condition than in the canonical view condition. Therefore, the object recognition system may rely more on the scene context when the object is difficult to recognize. In Experiment 2, the observers identified the background (background recognition task) while the scene consistency and object views were manipulated. The results showed that object viewpoint had no effect, while the scene consistency effect was observed. More specifically, the canonical and accidental views both equally provided contextual information for scene perception. These findings suggested that the mechanism for conscious recognition of objects could be dissociated from the mechanism for visual analysis of object images that were part of a scene. The "context" that the object images provided may have been derived from its view-invariant, relatively low-level visual features (e.g., color), rather than its semantic information.

  11. Cassini Closest Views of Dione II

    NASA Image and Video Library

    2015-08-20

    As NASA's Cassini soared above high northern latitudes on Saturn's moon Dione, the spacecraft looked down at a region near the day-night boundary. This view shows the region as a contrast-enhanced image in which features in shadow are illuminated by reflected light from Saturn. Inset just above center is a higher resolution view -- one of the mission's highest-resolution views of the Saturnian moon's icy surface. Territory seen here is just east of a crater named Butes, near an unnamed tectonic structure around 65 degrees north latitude, 25 degrees west longitude. The broader view is from the spacecraft's wide-angle camera (WAC) and includes an inset view from Cassini's narrow-angle camera (NAC). The NAC view (also available here at its full resolution) shows features about 10 times smaller than the WAC view. The unenhanced WAC view is also provided here. The views were obtained near the time of Cassini's closest approach to Dione during the encounter, like PIA19653. The NAC images in these two image releases are the highest resolution views of Dione's surface acquired by Cassini. The views were acquired in visible light at an altitude of 365 miles (588 kilometers) above Dione. The wide-angle camera image has an image scale of about 115 feet (35 meters) per pixel; the narrow-angle camera image has an image scale of about 12 feet (3.5 meters) per pixel. http://photojournal.jpl.nasa.gov/catalog/PIA19654

  12. The "anatomic" view of the suprarenals in medical imaging.

    PubMed

    Sénécail, B; Colin, D; Person, H; Vallée, B; Lefèvre, C

    1994-01-01

    Based on coordinates derived from three series of anatomic sections, the authors propose a view for tomographic investigation, applicable in MRI and ultrasound, which reconstructs the ideal image of the suprarenal gland in its quadrilateral as described by Testut. This "anatomic" view is 45 degrees vertical and oblique, intermediate between the sagittal and frontal views, which it can advantageously replace. A new aspect of suprarenal tomography, recalling the image of a triskele, is described in the context of this view.

  13. Noncontaminating Borescope Viewing Fixture

    NASA Technical Reports Server (NTRS)

    Molina, Orlando G.; Burley, Richard K.

    1992-01-01

    All-stainless-steel viewing fixture for borescope used without fear of breakage or contaminating internal cavities of equipment. Fixture fits over conventional viewing head on borescope. Used for internal inspections by visible illumination or visible fluorescence from ultraviolet illumination.

  14. View of Saturn Rings

    NASA Image and Video Library

    1999-01-18

    This view shows some detail and differences in the complex system of rings. This was one of the first pictures obtained once NASA Voyager 2 resumed returning images Aug. 29, 1979 after its scan platform was commanded to view Saturn.

  15. Phobos Viewed from Mars

    NASA Image and Video Library

    2005-09-11

    Taking advantage of extra solar energy collected during the day, NASA's Mars Exploration Rover Spirit settled in for an evening of stargazing, photographing the two moons of Mars as they crossed the night sky. The first two images in this sequence show gradual enhancements in the surface detail of Mars' largest moon, Phobos, made possible through a combination technique known as "stacking." In "stacking," scientists use a mathematical process known as Laplacian sharpening to reinforce features that appear consistently in repetitive images and minimize features that show up only intermittently. In this view of Phobos, the large crater named Stickney is just out of sight on the moon's upper right limb. Spirit acquired the first two images with the panoramic camera on the night of sol 585 (Aug. 26,2005). The far right image of Phobos, for comparison, was taken by the High Resolution Stereo Camera on Mars Express, a European Space Agency orbiter. The third image in this sequence was derived from the far right image by making it blurrier for comparison with the panoramic camera images to the left http://photojournal.jpl.nasa.gov/catalog/PIA06335

  16. Increasing the CO2 /N2 Selectivity with a Higher Surface Density of Pyridinic Lewis Basic Sites in Porous Carbon Derived from a Pyridyl-Ligand-Based Metal-Organic Framework.

    PubMed

    Li, Liangjun; Wang, Ying; Gu, Xin; Yang, Qipeng; Zhao, Xuebo

    2016-07-05

    The development of functional porous carbon with high CO2 /N2 selectivity is of great importance for CO2 capture. In this paper, a type of porous carbon with doped pyridinic sites (termed MOFC) was prepared from the carbonization of a pyridyl-ligand based MOF. Four MOFCs derived from different carbonizing temperatures were prepared. Structural studies revealed high contents of pyridinic-N groups and nearly the same pore-size distributions for these MOFCs. Gas-sorption studies revealed outstanding CO2 uptake at low pressures and room temperature. Owing to the high content of pyridinic-N groups, the CO2 /N2 selectivity on these MOFCs exhibits values of about 40-50, which are among the top values in carbon materials. Further correlation studies demonstrated that the CO2 /N2 selectivities show a positive linear relationship with the surface density of pyridinic-N groups, thus validating the synergistic effect of the doped pyridinic-N groups on CO2 adsorption selectivity. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  17. An alternative derivation of the stationary distribution of the multivariate neutral Wright-Fisher model for low mutation rates with a view to mutation rate estimation from site frequency data.

    PubMed

    Schrempf, Dominik; Hobolth, Asger

    2017-04-01

    Recently, Burden and Tang (2016) provided an analytical expression for the stationary distribution of the multivariate neutral Wright-Fisher model with low mutation rates. In this paper we present a simple, alternative derivation that illustrates the approximation. Our proof is based on the discrete multivariate boundary mutation model which has three key ingredients. First, the decoupled Moran model is used to describe genetic drift. Second, low mutation rates are assumed by limiting mutations to monomorphic states. Third, the mutation rate matrix is separated into a time-reversible part and a flux part, as suggested by Burden and Tang (2016). An application of our result to data from several great apes reveals that the assumption of stationarity may be inadequate or that other evolutionary forces like selection or biased gene conversion are acting. Furthermore we find that the model with a reversible mutation rate matrix provides a reasonably good fit to the data compared to the one with a non-reversible mutation rate matrix.

  18. Creating an Integrated Curriculum--The 'Higher' In Higher Education. 1981 Current Issues in Higher Education, No. 2.

    ERIC Educational Resources Information Center

    American Association for Higher Education, Washington, DC.

    Perspectives on creating an integrated college curriculum are presented in four papers. In "What is 'Higher' About Higher Education?" Harlan Cleveland suggests that colleges and universities should promote a global view and understanding of problems on society and international interdependence and should develop the capacity to analyze…

  19. Creating an Integrated Curriculum--The 'Higher' In Higher Education. 1981 Current Issues in Higher Education, No. 2.

    ERIC Educational Resources Information Center

    American Association for Higher Education, Washington, DC.

    Perspectives on creating an integrated college curriculum are presented in four papers. In "What is 'Higher' About Higher Education?" Harlan Cleveland suggests that colleges and universities should promote a global view and understanding of problems on society and international interdependence and should develop the capacity to analyze…

  20. A Comparison of Three Critics of Higher Education. Specialization Paper.

    ERIC Educational Resources Information Center

    Carraway, Cassandra T.

    This paper presents the views of three critics of higher education in America, chosen to represent the conservative, centrist, and liberal points of view. The critics are Russell Kirk (conservative), Robert Maynard Hutchins (middle ground), and Harold Taylor (liberal); and their views are presented within the framework of six concepts: (1) outlook…

  1. Address to the Statewide Higher Education Officers.

    ERIC Educational Resources Information Center

    Judge, Thomas L.

    Perspectives on higher education in Montana as viewed by the governor are presented. After briefly noting historical trends in Montana and the United States regarding education, concerns and trends in higher education are noted as follows: accountability to the public for how tax dollars are spent; evidence that there will be decreased demand for…

  2. Internationalisation of Higher Education in Hong Kong

    ERIC Educational Resources Information Center

    Pretor Fok, Wai-kei

    2007-01-01

    With a view that internationalisation is an interactive response to globalisation, this paper examines the internationalising activities in the higher education sector, and in particular, the Hong Kong higher education sector. Four main areas are covered: (a) internationalising staff and students, (b) building an international network, (c)…

  3. MODIS Views North Pole

    NASA Technical Reports Server (NTRS)

    2002-01-01

    This true-color image over the North Pole was acquired by the MODerate-resolution Imaging Spectroradiometer (MODIS), flying aboard the Terra spacecraft, on May 5, 2000. The scene was received and processed by Norway's MODIS Direct Broadcast data receiving station, located in Svalbard, within seconds of photons hitting the sensor's detectors. (Click for more details about MODIS Direct Broadcast data.) In this image, the sea ice appears white and areas of open water, or recently refrozen sea surface, appear black. The irregular whitish shapes toward the bottom of the image are clouds, which are often difficult to distinguish from the white Arctic surface. Notice the considerable number of cracks, or 'leads,' in the ice that appear as dark networks of lines. Throughout the region within the Arctic Circle leads are continually opening and closing due to the direction and intensity of shifting wind and ocean currents. Leads are particularly common during the summer, when temperatures are higher and the ice is thinner. In this image, each pixel is one square kilometer. Such true-color views of the North Pole are quite rare, as most of the time much of the region within the Arctic Circle is cloaked in clouds. Image by Allen Lunsford, NASA GSFC Direct Readout Laboratory; Data courtesy Tromso receiving station, Svalbard, Norway

  4. FWCW: a personal view.

    PubMed

    Li, A S

    1995-12-01

    The personal experiences at the Beijing Fourth World Conference on Women and the Nongovernmental Organization (NGO) Forum were described by a Chinese American veterinarian. The author became aware that women were primarily the persons living in poverty in the world. Business and government appeared more concerned with economic growth. As a consequence, developed countries with 20% of world population consume 80% of the world's resources. The privilege of money secures a position of power in the world, power to buy up the resources of the world. This process is unsustainable and inequitable. Women are viewed as key players in shifting the balance in favor of a higher quality of life. The NGO workshops on Women in Livestock Development (WILD) was run by women veterinarians, who worked at the local level with women in poor areas. WILD operates out of offices in Arkansas in the USA. WILD women work in Sichuan, China, among the Han and Tibetans in increasing family income through heifer and livestock production. Conference participants from WILD programs talked about their experiences with increased income and loans to other women. The World Women's Veterinary Association members, who attended the conference, visited a small animal clinic in Beijing run by the Agriculture Ministry, and Beijing Agricultural University and its Veterinary Teaching Hospital. Demonstrations were given of small animal acupuncture. The author found the conference to be a success and found that press reports misrepresented the energy generated by the meeting.

  5. Simplified Derivation Of Geometrical Dynamic Range Compression

    NASA Astrophysics Data System (ADS)

    Altman, W. P.

    1982-08-01

    A simplified derivation is presented which illustrates the effects of unmatched fields of view for a lidar system. The resultant equations are easily evaluated on a programmable calculator, and comparison with previous calculations are numerically similar.

  6. Evolving Technologies: A View to Tomorrow

    ERIC Educational Resources Information Center

    Tamarkin, Molly; Rodrigo, Shelley

    2011-01-01

    Technology leaders must participate in strategy creation as well as operational delivery within higher education institutions. The future of higher education--the view to tomorrow--is irrevocably integrated and intertwined with evolving technologies. This article focuses on two specific evolving technologies: (1) alternative IT sourcing; and (2)…

  7. Evolving Technologies: A View to Tomorrow

    ERIC Educational Resources Information Center

    Tamarkin, Molly; Rodrigo, Shelley

    2011-01-01

    Technology leaders must participate in strategy creation as well as operational delivery within higher education institutions. The future of higher education--the view to tomorrow--is irrevocably integrated and intertwined with evolving technologies. This article focuses on two specific evolving technologies: (1) alternative IT sourcing; and (2)…

  8. Structure of higher unitary dualities revisited

    NASA Astrophysics Data System (ADS)

    Temme, F. P.

    The structure of dual spin algebras of higher unitary symmetries is developed for NMR in the context of general SU(m) weighted formalisms for Gel'fand bases; the treatment developed here uses the branched and highly structured combinatorial p-tuples (number partitions) inherent in the scalar invariant Rota fields over {M1 - Mn} to derive the spin algebra over p ˇ- m = (2Ii + 1) of the [M](3/2)8, M = Metal, spin cluster component of a model 'Met-Carb', the molecular cluster 13C12[M]8, giving rise to a symmetry-partitionable 212 × 48 (≡ 4096 × 65536)-dimensioned state space for the dispersed-media NMR, provided the zeroth interaction terms are invariant under a finite group spin symmetry. The full unitary dual symmetry under (SU2 × ˇ- 2, 4 number partitions as an extension of other treatments of SU (m ˇ- 4) × ˇ- 6, and work based on Racah or diagrammatic methods. The present p-tuple view provides an especially direct approach, utilizing combinatorial entities as generators of the spin algebra.

  9. A common-view disciplined oscillator

    SciTech Connect

    Lombardi, Michael A.; Dahlen, Aaron P.

    2010-05-15

    This paper describes a common-view disciplined oscillator (CVDO) that locks to a reference time scale through the use of common-view global positioning system (GPS) satellite measurements. The CVDO employs a proportional-integral-derivative controller that obtains near real-time common-view GPS measurements from the internet and provides steering corrections to a local oscillator. A CVDO can be locked to any time scale that makes real-time common-view data available and can serve as a high-accuracy, self-calibrating frequency and time standard. Measurement results are presented where a CVDO is locked to UTC(NIST), the coordinated universal time scale maintained at the National Institute of Standards and Technology in Boulder, Colorado.

  10. Views of wireless network systems.

    SciTech Connect

    Young, William Frederick; Duggan, David Patrick

    2003-10-01

    Wireless networking is becoming a common element of industrial, corporate, and home networks. Commercial wireless network systems have become reliable, while the cost of these solutions has become more affordable than equivalent wired network solutions. The security risks of wireless systems are higher than wired and have not been studied in depth. This report starts to bring together information on wireless architectures and their connection to wired networks. We detail information contained on the many different views of a wireless network system. The method of using multiple views of a system to assist in the determination of vulnerabilities comes from the Information Design Assurance Red Team (IDART{trademark}) Methodology of system analysis developed at Sandia National Laboratories.

  11. Spin symmetry and Gel'fand patterns of higher SU2 x ℓn groups. Application of inner tensor product algebra and ℓ5 → ℓ5 ↓ ℓ4υ mapping in deriving the MQ-NMR spin sub

    NASA Astrophysics Data System (ADS)

    Temme, F. P.; Colpa, J. P.

    1992-06-01

    The nature of ℓ 5 spin algebra is considered together with ℓ 5↓ ℓ 5↓ C 4 v mapping in order to specify the dual spin symmetry for MQ-NMR of nido-11B5H9. The forms of Gel'fand shapes for ℓ 5 spin symmetry are presented to show how they specify the full range of multiplicities found in higher- n ℓ n -partitions. Tuples, or number-partitions and their ℓ n ↓ G invariance sets provide models for both the five-fold I i =3/2 component, and the two distinct types of spin-1/2 subsystems. The full spin symmetry is derived in terms of the direct product (( ℓ 5↓ C 4 v )⊗( ℓ 4↓ C 4 v ))1/2⊗( ℓ 5↓ C 4 v )3/2. The concepts used are implicit in the substructure of p-tuple model invariances over the subduced symmetry, or derive from the inner tensor product algebras under the ℓ n group. Both as a check on the combinatorially derived multiplicities of [λ] s and for insight into (non-simply-reducible) substructure of number-partitions, the study of mapping from : hrr'.:-tuples onto the ℓ n -partitional set for higher I i is invaluable. The motivation for this work lies in its pertinence to the MQ-NMR spin dynamics of clusterlike molecules. The accessible information content of a spin algebra over either form of spin space is bound up with a suitable symmetry partitioning of the problem, as implied by the use of { T kq ( v:[λ])} bases within higher q subspaces of the Liouville formalism.

  12. Hierarchical Linked Views

    SciTech Connect

    Erbacher, Robert; Frincke, Deb

    2007-07-02

    Coordinated views have proven critical to the development of effective visualization environments. This results from the fact that a single view or representation of the data cannot show all of the intricacies of a given data set. Additionally, users will often need to correlate more data parameters than can effectively be integrated into a single visual display. Typically, development of multiple-linked views results in an adhoc configuration of views and associated interactions. The hierarchical model we are proposing is geared towards more effective organization of such environments and the views they encompass. At the same time, this model can effectively integrate much of the prior work on interactive and visual frameworks. Additionally, we expand the concept of views to incorporate perceptual views. This is related to the fact that visual displays can have information encoded at various levels of focus. Thus, a global view of the display provides overall trends of the data while focusing in on individual elements provides detailed specifics. By integrating interaction and perception into a single model, we show how one impacts the other. Typically, interaction and perception are considered separately, however, when interaction is being considered at a fundamental level and allowed to direct/modify the visualization directly we must consider them simultaneously and how they impact one another.

  13. VIEW in Review.

    ERIC Educational Resources Information Center

    Bonner, Don; Ellis, Sherrlyn

    Under the Vocational Education Amendments (1968) to the Vocational Education Act of 1963, innovative state-level projects entitled Vital Information for Education and Work (VIEW) have been implemented. VIEW was designed as a supplementary aid for counselors, teachers, and administrators to assist students in making occupational and career choices.…

  14. Taking the Long View

    ERIC Educational Resources Information Center

    Bennett, Robert B., Jr.

    2010-01-01

    Legal studies faculty need to take the long view in their academic and professional lives. Taking the long view would seem to be a cliched piece of advice, but too frequently legal studies faculty, like their students, get focused on meeting the next short-term hurdle--getting through the next class, grading the next stack of papers, making it…

  15. WebView Materialization

    DTIC Science & Technology

    2000-01-01

    horoscope page (for Scorpio). Although this particular combination might be unique or unpopular, if we decompose the page into four WebViews, one for metro...news, one for international news, one for the weather and one for the horoscope , then these WebViews can be accessed frequently enough to merit

  16. Canonical structure of higher derivative gravity in 3D

    SciTech Connect

    Guellue, Ibrahim; Sisman, Tahsin Cagri; Tekin, Bayram

    2010-05-15

    We give an explicitly gauge-invariant canonical analysis of linearized quadratic gravity theories in three dimensions for both flat and de Sitter backgrounds. In flat backgrounds, we also study the effects of the gravitational Chern-Simons term, include the sources, and compute the weak field limit as well as scattering between spinning massive particles.

  17. The Perception of the Higher Derivatives of Visual Motion.

    DTIC Science & Technology

    1986-06-24

    stereoknetici. Archivo Italiano di Psicologia . tection: Comparison of postadaptation thresholds. Journal of the 1924.3. 105-120. Optical Society of America. 1983...1980, 19, 324-328. source book of Gestalt psychology. London: Routledge & Kegan Reichardt. W. Autocorrelation, a principle for the evaluation of

  18. The Perception of the Higher Derivatives of Visual Motion.

    DTIC Science & Technology

    1986-06-24

    RUNNING AT I KHZ/INTERVAL RATE, AND OUTPUTS A PULSE THROUGH BIT ZERO OF DIGITAL OUTPUT 2. CALLED WITH NO INTERVAL ARGUMENT, TURNS OFF THE CLOCK...2- CSIC :. DOC * ge Fe- 8 30 31 Controls execution of one trial (D 25) 33 Feedback tones 34 35 Deterrines whether to increase or decrease VMA from the

  19. Spherically symmetric solutions in higher-derivative gravity

    NASA Astrophysics Data System (ADS)

    Lü, H.; Perkins, A.; Pope, C. N.; Stelle, K. S.

    2015-12-01

    Extensions of Einstein gravity with quadratic curvature terms in the action arise in most effective theories of quantized gravity, including string theory. This article explores the set of static, spherically symmetric and asymptotically flat solutions of this class of theories. An important element in the analysis is the careful treatment of a Lichnerowicz-type "no-hair" theorem. From a Frobenius analysis of the asymptotic small-radius behavior, the solution space is found to split into three asymptotic families, one of which contains the classic Schwarzschild solution. These three families are carefully analyzed to determine the corresponding numbers of free parameters in each. One solution family is capable of arising from coupling to a distributional shell of matter near the origin; this family can then match onto an asymptotically flat solution at spatial infinity without encountering a horizon. Another family, with horizons, contains the Schwarzschild solution but includes also non-Schwarzschild black holes. The third family of solutions obtained from the Frobenius analysis is nonsingular and corresponds to "vacuum" solutions. In addition to the three families identified from near-origin behavior, there are solutions that may be identified as "wormholes," which can match symmetrically onto another sheet of spacetime at finite radius.

  20. Complex derivatives

    NASA Astrophysics Data System (ADS)

    Battiston, Stefano; Caldarelli, Guido; Georg, Co-Pierre; May, Robert; Stiglitz, Joseph

    2013-03-01

    The intrinsic complexity of the financial derivatives market has emerged as both an incentive to engage in it, and a key source of its inherent instability. Regulators now faced with the challenge of taming this beast may find inspiration in the budding science of complex systems.

  1. View from industry.

    PubMed

    Guezuraga, Robert M; Steinbring, Denise Y

    2004-12-01

    The transformation of the cardiothoracic specialty requires a complete mind-set and skill-set change such that the specialty repositions itself in this era of complex cardiac disease, increased competition, technology innovation, financial constraints, rationed access to technology and increased scrutiny on clinical outcomes. The future offers a variety of surgical treatment options for patients suffering from disease states that have traditionally not been treated by cardiothoracic surgeons such as ablation for atrial fibrillation and cell therapy for heart failure. In addition, patient expectations for prolonged and quality-improved years are higher as they educate themselves on options that are less invasive. Failure to build a new repertoire of skills will mean diminished access to patients because referrals will be made to those cardiothoracic surgeons who are seen as innovators. Time is of the essence, as market dynamics are taking their toll. Cardiothoracic surgery today is still one of the most profitable specialties within the hospital and therefore, hospitals should be willing to support and differentiate their heart programs through new technology adoption. But cardiothoracic surgeons need to be open to explore new methods for treating cardiac disease and to work with industry in proving the efficacy and patient benefits of new procedures. At a higher level, pan-European approaches to new technology adoption need to focus on increased governmental spending on healthcare and on reimbursement strategies that make this possible. The medical device industry continues to invest heavily in new techniques and technologies and should be viewed as a strategic partner by individual surgeons as well as by the surgical societies. As industry continues to focus on areas such as research, product development, market development, professional and resident education, reimbursement, and patient access issues, it is imperative for surgeons to work collaboratively with

  2. Viewing angle changeable display

    NASA Astrophysics Data System (ADS)

    Leng, Jinbi; Huang, Ziqiang; Yang, Wenjun; Chen, Xiaoxi

    2010-10-01

    Viewing angle changeable display can change the display viewing angle as needed: In the public place the display could have a narrow viewing angle for privacy, while in the private place the displays could have a wide viewing angle for the convenience of the operation and better viewing experience. This article propose a novel adjustable optical transmission device to realize the viewing angle changes for LCD by using the principle of guest- host effect of liquid crystal. The major technology is to insert a special equipment between the backlight and the LCD, through which the backlight will display either parallel or scattered features to get an either narrow or wide viewing angle. The equipment is an adjustable transmission cell (ATC) which is actually a black G-H LC cell. This ATC is the main focus of our invention. The ATC consists of a polarizer sheet and a special guest-host liquid crystal device filled with the two-phase dye (called as GH-LC in this report), to achieve the viewing angle change in the LCD. When an electrical field charges to the ATC, only the so-called near-axis lights can pass through the ATC within a relatively small angle, while the other scattered lights are absorbed sequentially by GH-LC and the polarizer sheet. On the other hand, when there is no electrical charge to the ATC, the cell behaves like a normal polarizer; and the scattered light can pass through the cell and polarizer in a normal way. This paper describes the principle and structure of the device, applies the electric field on the sample to observe the electro-optical properties, combine the theoretical and experimental research, getting the viewing angle effects of the display.

  3. Higher order mechanics on graded bundles

    NASA Astrophysics Data System (ADS)

    Bruce, Andrew James; Grabowska, Katarzyna; Grabowski, Janusz

    2015-05-01

    In this paper we develop a geometric approach to higher order mechanics on graded bundles in both, the Lagrangian and Hamiltonian formalism, via the recently discovered weighted algebroids. We present the corresponding Tulczyjew triple for this higher order situation and derive in this framework the phase equations from an arbitrary (also singular) Lagrangian or Hamiltonian, as well as the Euler-Lagrange equations. As important examples, we geometrically derive the classical higher order Euler-Lagrange equations and analogous reduced equations for invariant higher order Lagrangians on Lie groupoids.

  4. MISR Views the Moon

    NASA Image and Video Library

    2003-04-16

    A special maneuver of NASA Terra spacecraft was performed as it traversed the nightside enabling a backward somersault of the spacecraft, allowing the normally Earth-viewing instruments to look at deep space and the waxing gibbous Moon.

  5. Coastal Chile Perspective View

    NASA Image and Video Library

    2010-03-04

    This perspective view from NASA Shuttle Radar Topography Mission of coastal Chile indicates the epicenter red marker of the 8.8 earthquake on Feb. 27, 2010, just offshore of the Maule region in the Bahia de Chanco.

  6. Kepler Field of View

    NASA Image and Video Library

    The Kepler mission will be looking continuously at over 100,000 stars in one region of the sky, in the Cygnus and Lyra constellations. The field of view is extremely large for an astronomical teles...

  7. Curiosity View From Below

    NASA Image and Video Library

    2012-08-17

    The Curiosity engineering team created this cylindrical projection view from images taken by NASA Curiosity rover front hazard avoidance cameras underneath the rover deck on Sol 0. Pictured here are are the pigeon-toed the wheels.

  8. A World View Sampler.

    ERIC Educational Resources Information Center

    Willard, Timothy; And Others

    1984-01-01

    An overview of topics discussed at the World View '84 conference, sponsored by the World Future Society, is provided. Topics include technology, the economy, the Third World, the environment, world order, and outer space. (RM)

  9. MISR Views Hurricane Carlotta

    NASA Image and Video Library

    2000-07-08

    This anaglyph from NASA Terra satellite vertical nadir camera, shows Hurricane Carlotta location in the eastern Pacific Ocean, about 500 km south of Puerto Vallarta, Mexico in 2000. 3D glasses are necessary to view this image.

  10. TOPOGRAPHIC VIEW THE STATE FORESTER'S COMPLEX, VIEW LOOKING SOUTH FROM ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    TOPOGRAPHIC VIEW THE STATE FORESTER'S COMPLEX, VIEW LOOKING SOUTH FROM STATE STREET, WITH THE NATIONAL REGISTER-LISTED OREGON STATE FORESTER'S OFFICE BUILDING TO THE LEFT OF VIEW. - Oregon State Forester's Office Complex, 2600 State Street, Salem, Marion, OR

  11. 2. CONTEXTUAL VIEW OF WHITE ROCK ROAD, VIEW OF PROJECT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. CONTEXTUAL VIEW OF WHITE ROCK ROAD, VIEW OF PROJECT AREA LOOKING TOWARD ELEVATED INTERSECTION OF LATROBE ROAD; VIEW TO SOUTHWEST. - Placerville Road, White Rock Road between Clarksville & White Rock, El Dorado Hills, El Dorado County, CA

  12. 1. CONTEXTUAL VIEW OF WHITE ROCK ROAD, VIEW OF PROJECT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. CONTEXTUAL VIEW OF WHITE ROCK ROAD, VIEW OF PROJECT AREA WITH INTERSECTION OF LATROBE ROAD SEEN IN UPPER LEFT; VIEW TO NORTHEAST. - Placerville Road, White Rock Road between Clarksville & White Rock, El Dorado Hills, El Dorado County, CA

  13. 33. VIEW LOOKING NORTHNORTHWEST AT THE DENNIS HOTEL (PARTIAL VIEW ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    33. VIEW LOOKING NORTH-NORTHWEST AT THE DENNIS HOTEL (PARTIAL VIEW OF THE BLENHEIM HOTEL) - Marlborough, Blenheim & Dennis Hotels (aerial views), Between Park Place, Michigan Avenue & Boardwalk, Atlantic City, Atlantic County, NJ

  14. Higher Education and the Steady State. ERIC/Higher Education Research Report No. 4 1974.

    ERIC Educational Resources Information Center

    Leslie, Larry L.; Miller, Howard F., Jr.

    This paper examines the no-growth phenomenon in higher education. A framework is presented for viewing what is occurring in higher education as it seeks to resume a dynamic state of growth. Borrowing from Schumpeter's five categories of innovations by which business firms seek to gain a competitive edge over their rivals, an analytical framework…

  15. 4. DETAILED VIEW OF MAIN ENTRANCE ON SOUTHWEST FRONT. VIEW ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. DETAILED VIEW OF MAIN ENTRANCE ON SOUTHWEST FRONT. VIEW TO NORTHEAST. - Commercial & Industrial Buildings, Farley & Loetscher Manufacturing Company, Factory II, 750 White Street, Dubuque, Dubuque County, IA

  16. VIEW OF CENOTAPHS IN CONTEXT, A VIEW THAT EMPHASIZES THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF CENOTAPHS IN CONTEXT, A VIEW THAT EMPHASIZES THE STARK GEOMETRY OF LATROBE'S DESIGN - Congressional Cemetery, Latrobe Cenotaphs, Eighteenth & E Streets, Southeast, Washington, District of Columbia, DC

  17. Detail view of upper southwest corner, showing representative view of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail view of upper southwest corner, showing representative view of cornice and window ornamentation - Hungarian Sick Benefit Societies Building, 1406-1418 State Street, Bridgeport, Fairfield County, CT

  18. 4. PERSPECTIVE VIEW OF MAIN AND EAST ELEVATIONS, SHOWING VIEW ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. PERSPECTIVE VIEW OF MAIN AND EAST ELEVATIONS, SHOWING VIEW TOWARD CARPENTER'S HALL - Carpenters' Company, Front Store, 322 Chestnut Street & Carpenters' Court, Philadelphia, Philadelphia County, PA

  19. 22. VIEW SECOND FLOOR, TOP VIEW OF ELEVATOR WITH WINCHING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. VIEW SECOND FLOOR, TOP VIEW OF ELEVATOR WITH WINCHING MECHANISM, LOOKING NORTHWEST - Bates Manufacturing Company, Storehouse, Northeast corner of Chestnut Street & Hines Alley, Lewiston, Androscoggin County, ME

  20. Perspective View of Ishtar Terra

    NASA Technical Reports Server (NTRS)

    1980-01-01

    This perspective view of Ishtar Terra was derived from data obtained by the Pioneer Venus spacecraft's altimetry radar instrument. Ishtar viewed from the west (bottom of image) is centered at about 65 degrees north latitude and 0 degrees longitude. Ishtar (approximately equal in size to Australia) is a large plateau standing 3.3 km above the surrounding lowlands, bounded by relatively steep slopes. Rising above this plateau are three massifs: Akna Montes and Freyja Montes along the western and northwestern edge of Lakshmi Planum, and Maxwell Montes along its eastern edge. The eastern part of Ishtar, east of Maxwell, is a complex hilly terrain 1 km lower than Lakshmi Planum that lacks the steep well-defined boundary slopes that characterize the plateau. Maxwell Montes, highest point on the planet is elevated more than 10 km (32,000 ft) above the surrounding lowlands. Color-coded altimetry shows elevations in .5 and 1 km intervals. Cool colors mark low elevations and warm colors mark high elevations

  1. Selecting materialized views in a data warehouse

    NASA Astrophysics Data System (ADS)

    Zhou, Lijuan; Liu, Chi; Liu, Daxin

    2003-01-01

    A Data Warehouse contains lots of materialized views over the data provided by the distributed heterogeneous databases for the purpose of efficiently implementing decision-support or OLAP queries. It is important to select the right view to materialize that answer a given set of queries. In this paper, we have addressed and designed algorithm to select a set of views to materialize in order to answer the most queries under the constraint of a given space. The algorithm presented in this paper aim at making out a minimum set of views, by which we can directly respond to as many as possible user"s query requests. We use experiments to demonstrate our approach. The results show that our algorithm works better. We implemented our algorithms and a performance study of the algorithm shows that the proposed algorithm gives a less complexity and higher speeds and feasible expandability.

  2. Higher Education Exchange, 2012

    ERIC Educational Resources Information Center

    Brown, David W., Ed.; Witte, Deborah, Ed.

    2012-01-01

    "Higher Education Exchange" publishes case studies, analyses, news, and ideas about efforts within higher education to develop more democratic societies. Contributors to this issue of the "Higher Education Exchange" examine whether institutions of higher learning are doing anything to increase the capacity of citizens to shape…

  3. Higher Education Exchange, 2008

    ERIC Educational Resources Information Center

    Brown, David W., Ed.; Witte, Deborah, Ed.

    2008-01-01

    "Higher Education Exchange" publishes case studies, analyses, news, and ideas about efforts within higher education to develop more democratic societies. Contributors to this issue of the "Higher Education Exchange" examine whether institutions of higher learning are doing anything to increase the capacity of citizens to shape…

  4. Higher Education Exchange, 2010

    ERIC Educational Resources Information Center

    Brown, David W., Ed.; Witte, Deborah, Ed.

    2010-01-01

    "Higher Education Exchange" publishes case studies, analyses, news, and ideas about efforts within higher education to develop more democratic societies. Contributors to this issue of the "Higher Education Exchange" examine whether institutions of higher learning are doing anything to increase the capacity of citizens to shape their future.…

  5. Higher Education Exchange, 2014

    ERIC Educational Resources Information Center

    Brown, David W., Ed.; Witte, Deborah, Ed.

    2014-01-01

    Research shows that not only does higher education not see the public; when the public, in turn, looks at higher education, it sees mostly malaise, inefficiencies, expense, and unfulfilled promises. Yet, the contributors to this issue of the "Higher Education Exchange" tell of bright spots in higher education where experiments in working…

  6. Higher Education Exchange, 2011

    ERIC Educational Resources Information Center

    Brown, David W., Ed.; Witte, Deborah, Ed.

    2011-01-01

    "Higher Education Exchange" publishes case studies, analyses, news, and ideas about efforts within higher education to develop more democratic societies. Contributors to this issue of the "Higher Education Exchange" examine whether institutions of higher learning are doing anything to increase the capacity of citizens to shape…

  7. Higher Education Exchange, 2004

    ERIC Educational Resources Information Center

    Brown, David W., Ed; Witte, Deborah, Ed.

    2004-01-01

    The Higher Education Exchange is part of a movement to strengthen higher education's democratic mission and foster a more democratic culture throughout American society. Working in this tradition, the Higher Education Exchange publishes case studies, analyses, news, and ideas about efforts within higher education to develop more democratic…

  8. Student Perspectives on Quality in Higher Education

    ERIC Educational Resources Information Center

    Jungblut, Jens; Vukasovic, Martina; Stensaker, Bjørn

    2015-01-01

    The study provides an insight into student perspectives on quality in higher education, using Harvey and Green conceptualizations as the point of departure, and exploring the linkages between the views on quality, the developments of the Bologna Process and related national reforms, as well as students' motivation for and expectations from higher…

  9. Setting Standards in Australian Higher Education?

    ERIC Educational Resources Information Center

    Thompson-Whiteside, Scott

    2012-01-01

    In view of recent legislation to introduce the Tertiary Education Quality and Standards Agency in Australia, greater emphasis is being placed on the notion of standards in higher education. A standards-based audit or assessment implies that institutions need to demonstrate performance or achievement against a set of explicit thresholds. This…

  10. Grade Inflation: Academic Standards in Higher Education

    ERIC Educational Resources Information Center

    Hunt, Lester H., Ed.

    2008-01-01

    This book provides a provocative look at the issues and controversies surrounding grade inflation, and, more generally, grading practices in American higher education. The contributors confront the issues from a number of different disciplines and varying points of view. Topics explored include empirical evidence for and against the claim that…

  11. Higher Education Management. The Key Elements.

    ERIC Educational Resources Information Center

    Warner, David, Ed.; Palfreyman, David, Ed.

    This book presents the views of 15 individual authors on the principles of management in higher education from a British perspective. Preliminary material includes brief biographical sketches of each contributing author and a list of selected abbreviations. Individual chapters are: (1) "Setting the Scene" (David Palfreyman and David…

  12. Postgraduate Outcomes in American Higher Education

    ERIC Educational Resources Information Center

    Coughlin, Mary Ann; Laguilles, Jerold S.; Kelly, Heather A.; Walters, Allison M.

    2016-01-01

    This chapter provides a big-picture view of the postgraduate outcomes landscape. In an effort to promote understanding and to communicate the value of a higher education credential to various stakeholders, five national efforts are described, each of which provides a different perspective for defining, measuring, and collecting postgraduate…

  13. Postgraduate Outcomes in American Higher Education

    ERIC Educational Resources Information Center

    Coughlin, Mary Ann; Laguilles, Jerold S.; Kelly, Heather A.; Walters, Allison M.

    2016-01-01

    This chapter provides a big-picture view of the postgraduate outcomes landscape. In an effort to promote understanding and to communicate the value of a higher education credential to various stakeholders, five national efforts are described, each of which provides a different perspective for defining, measuring, and collecting postgraduate…

  14. Embedding Quality: The Challenges for Higher Education

    ERIC Educational Resources Information Center

    Lomas, Laurie

    2004-01-01

    This paper reviews recent research, literature and the views of a small sample of senior managers and academics in English higher education institutions on the challenges associated with embedding quality. When implemented by a university, quality enhancement models such as total quality management and the European Foundation for Quality…

  15. Peer Learning for Change in Higher Education

    ERIC Educational Resources Information Center

    Hilsdon, John

    2014-01-01

    This paper draws upon small scale, qualitative research at a UK university to present a Learning Development (LD) perspective on peer learning. This approach is offered as a lens for exploring social aspects of learning, cultural change in higher education and implications for pedagogy and policy. Views of a small group of peer learning leaders…

  16. Grade Inflation: Academic Standards in Higher Education

    ERIC Educational Resources Information Center

    Hunt, Lester H., Ed.

    2008-01-01

    This book provides a provocative look at the issues and controversies surrounding grade inflation, and, more generally, grading practices in American higher education. The contributors confront the issues from a number of different disciplines and varying points of view. Topics explored include empirical evidence for and against the claim that…

  17. Embedding Quality: The Challenges for Higher Education

    ERIC Educational Resources Information Center

    Lomas, Laurie

    2004-01-01

    This paper reviews recent research, literature and the views of a small sample of senior managers and academics in English higher education institutions on the challenges associated with embedding quality. When implemented by a university, quality enhancement models such as total quality management and the European Foundation for Quality…

  18. Mapping Efficient Communication Networks in Higher Education.

    ERIC Educational Resources Information Center

    Lubinescu, E. S.; Prabhu, R. P.; Terheggen, S. L.

    Some perspectives are presented that help explain communication networks in institutions of higher education and the factors that impede or facilitate their efficient functioning. The first theory that informs this exploration is that of K. Wieck (1969), which states that communication can be viewed through the lens of "sensemaking." The…

  19. Student Perspectives on Quality in Higher Education

    ERIC Educational Resources Information Center

    Jungblut, Jens; Vukasovic, Martina; Stensaker, Bjørn

    2015-01-01

    The study provides an insight into student perspectives on quality in higher education, using Harvey and Green conceptualizations as the point of departure, and exploring the linkages between the views on quality, the developments of the Bologna Process and related national reforms, as well as students' motivation for and expectations from higher…

  20. The Yeshiva Decision: A Somewhat Different View.

    ERIC Educational Resources Information Center

    Finkin, Matthew W.

    1980-01-01

    Viewed from the perspective of administrative law, labor law, or just higher education, the Yeshiva decision does not make sense. It would be appropriate in future litigation to compel the court to do what it refused to do here, that is to address the extent to which the industrial analogy applies to colleges and universities. (MSE)

  1. The Yeshiva Decision: A Somewhat Different View.

    ERIC Educational Resources Information Center

    Finkin, Matthew W.

    1980-01-01

    Viewed from the perspective of administrative law, labor law, or just higher education, the Yeshiva decision does not make sense. It would be appropriate in future litigation to compel the court to do what it refused to do here, that is to address the extent to which the industrial analogy applies to colleges and universities. (MSE)

  2. Supersymmetric models with higher dimensional operators

    NASA Astrophysics Data System (ADS)

    Antoniadis, I.; Dudas, E.; Ghilencea, D. M.

    2008-03-01

    In 4D renormalisable theories, integrating out massive states generates in the low energy effective action higher dimensional operators (derivative or otherwise). Using a superfield language it is shown that a 4D N=1 supersymmetric theory with higher derivative operators in either the Kahler or the superpotential part of the Lagrangian and with an otherwise arbitrary superpotential, is equivalent to a 4D N=1 theory of second order (i.e. without higher derivatives) with additional superfields and renormalised interactions. We provide examples where a free theory with trivial supersymmetry breaking provided by a linear superpotential becomes, in the presence of higher derivatives terms and in the second order version, a non-trivial interactive one with spontaneous supersymmetry breaking. The couplings of the equivalent theory acquire a threshold correction through their dependence on the scale of the higher dimensional operator(s). The scalar potential in the second order theory is not necessarily positive definite, and one can in principle have a vanishing potential with broken supersymmetry. We provide an application to MSSM and argue that at tree-level and for a mass scale associated to a higher derivative term in the TeV range, the Higgs mass can be lifted above the current experimental limits.

  3. Earth Views- Apollo 8

    NASA Image and Video Library

    1968-12-23

    S68-55808 (23 Dec. 1968) --- This spectacular view of Earth was transmitted back from space during the second live television transmission from the Apollo 8 spacecraft on the third day of its journey toward the moon. This view is looking through a spacecraft window. At the time of this TV transmission (at 2 p.m. CST), Apollo 8 was traveling on its trans-lunar course at about 3,254 feet per second, and was some 176,533 miles from Earth.

  4. Real view thermography

    NASA Astrophysics Data System (ADS)

    Bienkowski, L.; Homma, C.

    2013-01-01

    In this paper we present a novel approach for enhancing active thermography for nondestructive testing. In order to make the evaluation of the data more intuitive a Real View setup is presented that uses a projection technique to let the inspector view and interact with the measurement results directly on the part in a very intuitive way. Moreover we present an analysis approach using a Sobel filter of the pulse-phase result data in order to investigate the detectability of flaws by induction thermography. By projecting this information we give a visual feedback to the operator for optimizing the probability of detection.

  5. Making views self-maintainable for data warehousing

    SciTech Connect

    Quass, D.; Widom, J.; Gupta, A.; Mumick, I.S.

    1996-12-31

    A data warehouse stores materialized views over data from one or more sources in order to provide fast access to the integrated data, regardless of the availability of the data sources. Warehouse views need to be maintained in response to changes to the base data in the sources. Except for very simple views, maintaining a warehouse view requires access to data that is not available in the view itself. Hence, to maintain the view, one either has to query the data sources or store auxiliary data in the warehouse. We show that by using key and referential integrity constraints, we often can maintain a select-project-join view without going to the data sources or replicating the base relations in their entirety in the warehouse. We derive a set of auxiliary views such that the warehouse view and the auxiliary views together are self-maintainable-they can be maintained without going to the data sources or replicating all base data. In addition, our technique can be applied to simplify traditional materialized view maintenance by exploiting key and referential integrity constraints.

  6. Financing Higher Education

    ERIC Educational Resources Information Center

    Shermenev, M. K.

    1978-01-01

    Discusses problems related to financing of higher education in the Soviet Union and concludes that further study of higher education expenses is necessary in order to work out the most rational financing system. (Author/DB)

  7. Higher Education: Paradise Lost?

    ERIC Educational Resources Information Center

    Kerr, Clark

    1978-01-01

    Some of the reasons for the comparative decline of the elite sector are analyzed, including (1) the historical transition from elite to mass access to universal higher education, (2) the politicization of higher education, and (3) the increasing submergence of higher education under external social controls. The preservation of an elite or "highly…

  8. Disorders in Higher Education.

    ERIC Educational Resources Information Center

    Walton, Clarence C.; Bolman, Frederick deW.

    Conditions affecting the moral and intellectual integrity of American colleges and universities are discussed in a series of papers collected from the 56th American Assembly on "The Integrity of Higher Education." An erosion of public confidence in higher education is noted and it is suggested that the expectations of higher education have not…

  9. Higher Education: Paradise Lost?

    ERIC Educational Resources Information Center

    Kerr, Clark

    1978-01-01

    Some of the reasons for the comparative decline of the elite sector are analyzed, including (1) the historical transition from elite to mass access to universal higher education, (2) the politicization of higher education, and (3) the increasing submergence of higher education under external social controls. The preservation of an elite or "highly…

  10. India's Higher Education Challenges

    ERIC Educational Resources Information Center

    Altbach, Philip G.

    2014-01-01

    India, with the world's second largest higher education system and a rapidly growing economy as one of the BRIC nations, faces significant challenges in building both capacity and excellence in higher education. India's higher education system is characterized by "islands of excellence in a sea of mediocrity." The mainstream universities…

  11. Higher Education Exchange, 2007

    ERIC Educational Resources Information Center

    Brown, David W., Ed.; Witte, Deborah, Ed.

    2007-01-01

    "Higher Education Exchange" publishes case studies, analyses, news, and ideas about efforts within higher education to develop more democratic societies. Contributors to this issue of the "Higher Education Exchange" discuss the concept of growing public scholars; each contribution incorporates a student component. Articles…

  12. India's Higher Education Challenges

    ERIC Educational Resources Information Center

    Altbach, Philip G.

    2014-01-01

    India, with the world's second largest higher education system and a rapidly growing economy as one of the BRIC nations, faces significant challenges in building both capacity and excellence in higher education. India's higher education system is characterized by "islands of excellence in a sea of mediocrity." The mainstream universities…

  13. Reflections on "Higher Education"

    ERIC Educational Resources Information Center

    Gilbert, Felix

    1974-01-01

    The elitist, professional, and philosophical elements of higher education are reflected upon with stress on the differences between higher education and higher learning, where education is concerned with giving wider groups a share in a broad image of man, and learning is concerned with increasing specialization. (JH)

  14. Neutron radiographic viewing system

    NASA Technical Reports Server (NTRS)

    Leysath, W.; Brown, R. L.

    1972-01-01

    Neutron radiographic viewing system consisting of camera head and control processor is developed for use in nondestructive testing applications. Camera head consists of neutron-sensitive image intensifier system, power supply, and SEC vidicon camera head. Both systems, with their optics, are housed on test mount.

  15. Contrasting Views on Censorship.

    ERIC Educational Resources Information Center

    Riel, Arthur R., Jr.

    This paper asserts that public demands for book censorship are but one aspect of a deep public dissatisfaction with the educational establishment, and develops the thesis that the cause of this dissatisfaction is the contrast in world views and religions of those in the educational establishment and the censors. The educational establishment…

  16. Baja Earthquake Perspective View

    NASA Image and Video Library

    2010-04-05

    The topography surrounding the Laguna Salada Fault in the Mexican state of Baja, California, is shown in this combined radar image and topographic view with data from NASA Shuttle Radar Topography Mission where a 7.2 earthquake struck on April 4, 2010.

  17. Aerial Views of KSC

    NASA Image and Video Library

    2003-07-23

    This aerial view, looking northwest, shows the newly opened Space Commerce Way that winds from S.R 3 on the right to its exit on S.R. 405 (near the top) in the background. The road is the new public access from Merritt Island to the KSC Visitor Complex (seen at top).

  18. Viewing Files | Smokefree 60+

    Cancer.gov

    In addition to standard HTML webpages, our website contains files in other formats. You may need additional software or browser plug-ins to view some of these files. The following list shows each format along with links to the corresponding freely available plug-ins or viewers. Documents  Adobe Acrobat Reader (.pdf)

  19. MISR Views Florida

    NASA Technical Reports Server (NTRS)

    2000-01-01

    Multi-angle Imaging SpectroRadiometer (MISR) images of Florida acquired on April 9, 2000 during Terra orbit 1650. The image at the top is a color view acquired by the vertical (nadir) camera. It has been reoriented so that the flight path is from left to right, to facilitate comparison with the lower image, a stereo 'anaglyph' generated using 275-m resolution red band data from the cameras viewing 45.6 degrees and 70.5 degrees aft of nadir. The anaglyph provides a three-dimensional effect when viewed using red/blue glasses with the red filter placed over the left eye. This stereoscopic 'depth perception' and the variation in brightness as a function of view angle enables scientists to assess the climate impact of different types of cloud fields. The plume from a large brush fire that burned about 15,000 acres is visible at the western edge of the Big Cypress Swamp in southern Florida. East is toward the top.

    MISR was built and is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Office of Earth Science, Washington, DC. The Terra satellite is managed by NASA's Goddard Space Flight Center, Greenbelt, MD. JPL is a division of the California Institute of Technology.

    For more information: http://www-misr.jpl.nasa.gov

  20. View from Above

    NASA Image and Video Library

    2016-10-31

    Saturn appears as a serene globe amid tranquil rings in this view from NASA's Cassini spacecraft. In reality, the planet's atmosphere is an ever-changing scene of high-speed winds and evolving weather patterns, punctuated by occasional large storms (see PIA14901). The rings, consist of countless icy particles, which are continually colliding. Such collisions play a key role in the rings' numerous waves and wakes, which are the manifestation of the subtle influence of Saturn's moons and, indeed, the planet itself. The long duration of the Cassini mission has allowed scientists to study how the atmosphere and rings of Saturn change over time, providing much-needed insights into this active planetary system. The view looks toward the sunlit side of the rings from about 41 degrees above the ring plane. The image was taken with the Cassini spacecraft wide-angle camera on July 16, 2016 using a spectral filter which preferentially admits wavelengths of near-infrared light centered at 752 nanometers. The view was acquired at a distance of approximately 1 million miles (2 million kilometers) from Saturn. Image scale is 68 miles (110 kilometers) per pixel. The view was obtained at a distance of approximately 752,000 miles (1.21 million kilometers) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 6 degrees. Image scale is 45 miles (72 kilometers) per pixel. http://photojournal.jpl.nasa.gov/catalog/PIA20502

  1. Competing views on cancer

    PubMed Central

    Sonnenschein, Carlos; Soto, Ana M; Rangarajan, Annapoorni; Kulkarni, Prakash

    2014-01-01

    Despite intense research efforts that have provided enormous insight, cancer continues to be a poorly understood disease. There has been much debate over whether the cancerous state can be said to originate in a single cell or whether it is a reflection of aberrant behaviour on the part of a ‘society of cells’. This article presents, in the form of a debate conducted among the authors, three views of how the problem might be addressed. We do not claim that the views exhaust all possibilities. These views are (a) the tissue organization field theory (TOFT) that is based on a breakdown of tissue organization involving many cells from different embryological layers, (b) the cancer stem cell (CSC) hypothesis that focuses on genetic and epigenetic changes that take place within single cells, and (c) the proposition that rewiring of the cell’s protein interaction networks mediated by intrinsically disordered proteins (IDPs) drives the tumorigenic process. The views are based on different philosophical approaches. In detail, they differ on some points and agree on others. It is left to the reader to decide whether one approach to understanding cancer appears more promising than the other. PMID:24736160

  2. The Viewer Viewed.

    ERIC Educational Resources Information Center

    Svennevig, Michael

    Collection of detailed data on normative overall patterns of television viewer behavior has been an ongoing effort of the Broadcasters' Audience Research Board (BARB) in the United Kingdom. While their measurement system--self-completion viewing diaries in conjunction with electronic meters recording television set use--may register that an…

  3. [Acromegaly: current view].

    PubMed

    Kršek, Michal

    2015-10-01

    Acromegaly is a rare disorder caused by autonomous oversecretion of growth hormone mostly by pituitary adenoma. Untreated acromegaly leads to significantly increased morbidity and mortality and impaired quality of life. Early diagnosis and treatment is therefore essential for improvement of patients prognosis and management of acromegaly should be concentrated in specialized centres. Present article summarizes current view on diagnosis and treatment of acromegaly.

  4. Aerial Views of KSC

    NASA Image and Video Library

    2003-07-23

    The KSC Press Site is seen from the air. The large white building is the NASA News Center. At lower left are the grandstands that provide viewing of Shuttle launches for the media. Stretching from the News Center to the right are buildings and trailers occupied by television media and other news agencies such as Associated Press and Reuters.

  5. Hubble View of Neptune

    NASA Image and Video Library

    1998-08-02

    These NASA Hubble Space Telescope views of the blue-green planet Neptune provide three snapshots of changing weather conditions. The images were taken in 1994 on 3 separate days when Neptune was 2.8 billion miles 4.5 billion kilometers from Earth.

  6. The View from Somewhere

    ERIC Educational Resources Information Center

    Wilson, Maja

    2008-01-01

    Wilson asserts that the quest for absolute objectivity in scoring student writing--including the use of rubrics--creates harmful distance between reader and writer and ignores the unique, transactional characteristics of writing. She puts forth the view of Rosenblatt and other literacy theorists that meaning and value of texts are not rigidly…

  7. The Director's View.

    ERIC Educational Resources Information Center

    Fothergill, Richard

    1987-01-01

    Reviews the Microelectronics Education Programme (MEP) from the director's point of view, including the origins and basic structure of the program which ran for six years. The collaboration of teachers, advisers, and trainers is emphasized, research and evaluation procedures are discussed, and learning processes, computer studies, and distribution…

  8. Back view of beauty: a bias in attractiveness judgment.

    PubMed

    Yonemura, Keiichi; Ono, Fuminori; Watanabe, Katsumi

    2013-01-01

    Attractiveness judgment based on visual appearance seems easy and almost automatic. However, it becomes difficult when we need to rely on glances of a person's back view (eg while passing on the street). How is attractiveness judgment from the back view consistent with that from full-front view? In experiment 1 participants rated the attractiveness of human heads photographed from behind and from the front. Attractiveness ratings between the back and front views were weakly but significantly correlated. However, on average, the back-view photographs were rated more attractive than the front-view photographs. The tendency was most conspicuous when the male participants viewed the photographs of women. In experiment 2 participants were explicitly asked to predict the facial attractiveness of each head's front view based on the back view. Again, the predicted attractiveness based on the back view was higher than the actual rating of the front-view photographs, and the difference reached significance when the male participants viewed the women photographs. These biases in attractiveness judgment would be related to attractiveness judgments in everyday situations where straight full-frontal encounters are rare.

  9. Entanglement equilibrium for higher order gravity

    NASA Astrophysics Data System (ADS)

    Bueno, Pablo; Min, Vincent S.; Speranza, Antony J.; Visser, Manus R.

    2017-02-01

    We show that the linearized higher derivative gravitational field equations are equivalent to an equilibrium condition on the entanglement entropy of small spherical regions in vacuum. This extends Jacobson's recent derivation of the Einstein equation using entanglement to include general higher derivative corrections. The corrections are naturally associated with the subleading divergences in the entanglement entropy, which take the form of a Wald entropy evaluated on the entangling surface. Variations of this Wald entropy are related to the field equations through an identity for causal diamonds in maximally symmetric spacetimes, which we derive for arbitrary higher derivative theories. If the variations are taken holding fixed a geometric functional that we call the generalized volume, the identity becomes an equivalence between the linearized constraints and the entanglement equilibrium condition. We note that the fully nonlinear higher curvature equations cannot be derived from the linearized equations applied to small balls, in contrast to the situation encountered in Einstein gravity. The generalized volume is a novel result of this work, and we speculate on its thermodynamic role in the first law of causal diamond mechanics, as well as its possible application to holographic complexity.

  10. Generalized structure of higher order nonclassicality

    NASA Astrophysics Data System (ADS)

    Verma, Amit; Pathak, Anirban

    2010-02-01

    A generalized notion of higher order nonclassicality (in terms of higher order moments) is introduced. Under this generalized framework of higher order nonclassicality, conditions of higher order squeezing and higher order subpoissonian photon statistics are derived. A simpler form of the Hong-Mandel higher order squeezing criterion is derived under this framework by using an operator ordering theorem introduced by us in [A. Pathak, J. Phys. A 33 (2000) 5607]. It is also generalized for multi-photon Bose operators of Brandt and Greenberg. Similarly, condition for higher order subpoissonian photon statistics is derived by normal ordering of higher powers of number operator. Further, with the help of simple density matrices, it is shown that the higher order antibunching (HOA) and higher order subpoissonian photon statistics (HOSPS) are not the manifestation of the same phenomenon and consequently it is incorrect to use the condition of HOA as a test of HOSPS. It is also shown that the HOA and HOSPS may exist even in absence of the corresponding lower order phenomenon. Binomial state, nonlinear first order excited squeezed state (NLESS) and nonlinear vacuum squeezed state (NLVSS) are used as examples of quantum state and it is shown that these states may show higher order nonclassical characteristics. It is observed that the Binomial state which is always antibunched, is not always higher order squeezed and NLVSS which shows higher order squeezing does not show HOSPS and HOA. The opposite is observed in NLESS and consequently it is established that the HOSPS and HOS are two independent signatures of higher order nonclassicality.

  11. Performance indicators: healthcare professionals' views.

    PubMed

    Gu, Xiuzhu; Itoh, Kenji

    2016-08-08

    Purpose - The purpose of this paper is to capture factors behind professional views of indicator usefulness as a common structure for assessing healthcare performance and their important characteristics to design limited key performance indicators (PIs) for holistic hospital management. Design/methodology/approach - Two surveys were conducted using self-administered questionnaires, in which hospital manager/staff respondents were asked to rate the 52 PIs' usefulness. In total, 228 manager and 894 staff responses were collected. Findings - Eight factors were elicited from manager and staff responses as performance measures with 72 percent cumulative variance accounted for. Hospital managers and staff showed similar performance measure perceptions: high-utility acknowledgment on safety, operational efficiency and patient/employee satisfaction but relatively low-employee development concerns. Manager indicator usefulness perceptions were rather homogeneous and significantly higher than staff for almost all performance measures. Practical implications - Homogeneous manager views mean that a single key PI set for hospital management may be established regardless of hospital attributes. The following aspects may be measures that should be managed in a healthcare organization based on their key PIs: patient/employee safety, operational efficiency, financial effectiveness and patient/employee satisfaction. Originality/value - This is a pilot study on hospital management PIs in Japan. The eight-dimensional factor structure and findings about healthcare provider perceptions may be useful for healthcare management.

  12. Higher Education as a Pedagogical Site for Citizenship Education

    ERIC Educational Resources Information Center

    Davids, Nuraan; Waghid, Yusef

    2016-01-01

    That the issue of violence sits uneasily on the conscience of higher education is evident in the view that educated people are as likely as uneducated people to participate in violence. The concern of conscience is equally prevalent in the view that the public role of the university is "the responsibility of a community of thinking".…

  13. Higher Education as a Pedagogical Site for Citizenship Education

    ERIC Educational Resources Information Center

    Davids, Nuraan; Waghid, Yusef

    2016-01-01

    That the issue of violence sits uneasily on the conscience of higher education is evident in the view that educated people are as likely as uneducated people to participate in violence. The concern of conscience is equally prevalent in the view that the public role of the university is "the responsibility of a community of thinking".…

  14. In defense of derivations

    NASA Astrophysics Data System (ADS)

    Mungan, Carl E.

    2016-05-01

    At the 2015 AAPT Summer Meeting, I presented four derivations of the formula for motional emf. Such physics derivations involve the construction of explanatory frameworks involving diagrams and mathematical models. Although textbooks devote considerable space to such explanations, many teachers and students spend their time on worksheets, end-of-chapter problems, and the like. The book is reduced to a bank of solved (i.e., example) and unsolved (i.e., homework) questions, along with equations in colored boxes that presumably are to be used to answer those questions. Such an approach encourages fragmentation of knowledge, the view that there is only one right answer to a problem with the goal of physics being to find that answer (neatly boxed of course), and the inability to reason about even a slightly different (much less a novel) situation. If we are to develop scientific literacy, significant course time must be devoted to explaining the structure of and support for the models and equations we use.

  15. MISR Views Hurricane Carlotta

    NASA Technical Reports Server (NTRS)

    2000-01-01

    With winds reaching 155 mph, this year's Hurricane Carlotta became the second strongest eastern Pacific June hurricane on record. These images from MISR show the hurricane on June 21, the day of its peak intensity. The pictures are oriented so that the spacecraft's flight path is from left to right; north is at the left.

    The top image is a color view from MISR's vertical (nadir) camera, showing Carlotta's location in the eastern Pacific Ocean, about 500 km south of Puerto Vallarta, Mexico.

    The middle image is a stereoscopic 'anaglyph' created using MISR's nadir camera plus one of its aftward-viewing cameras, and shows a closer view of the area around the hurricane. Viewing with red/blue glasses (red filter over the left eye) is required to obtain a 3-D stereo effect.

    Near the center of the storm, the eye is about 25 km in diameter and partially obscured by a thin cloud. About 50 km to the left of the eye, the sharp drop-off from high-level to low-level cloud gives a sense of the vertical extent of the hidden eye wall. The low-level cloud is spiraling counterclockwise into the center of the cyclone. It then rises in the vicinity of the eye wall and emerges with a clockwise rotation at high altitude. Maximum surface winds are found near the eye wall.

    The bottom stereo image is a zoomed-in view of convective clouds in the hurricane's spiral arms. The arms are breeding grounds for severe thunderstorms, with associated heavy rain and flooding, frequent lightning, and tornadoes. Thunderstorms rise in dramatic fashion to about the same altitude as the high cloud near the hurricane's center, and are made up of individual cells that are typically less than 20 km in diameter. This image shows a number of these cells, some fairly isolated, and others connected together. Their three-dimensional structure is clearly apparent in this stereo view.

    MISR was built and is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Office of Earth Science

  16. MISR Views Hurricane Carlotta

    NASA Technical Reports Server (NTRS)

    2000-01-01

    With winds reaching 155 mph, this year's Hurricane Carlotta became the second strongest eastern Pacific June hurricane on record. These images from MISR show the hurricane on June 21, the day of its peak intensity. The pictures are oriented so that the spacecraft's flight path is from left to right; north is at the left.

    The top image is a color view from MISR's vertical (nadir) camera, showing Carlotta's location in the eastern Pacific Ocean, about 500 km south of Puerto Vallarta, Mexico.

    The middle image is a stereoscopic 'anaglyph' created using MISR's nadir camera plus one of its aftward-viewing cameras, and shows a closer view of the area around the hurricane. Viewing with red/blue glasses (red filter over the left eye) is required to obtain a 3-D stereo effect.

    Near the center of the storm, the eye is about 25 km in diameter and partially obscured by a thin cloud. About 50 km to the left of the eye, the sharp drop-off from high-level to low-level cloud gives a sense of the vertical extent of the hidden eye wall. The low-level cloud is spiraling counterclockwise into the center of the cyclone. It then rises in the vicinity of the eye wall and emerges with a clockwise rotation at high altitude. Maximum surface winds are found near the eye wall.

    The bottom stereo image is a zoomed-in view of convective clouds in the hurricane's spiral arms. The arms are breeding grounds for severe thunderstorms, with associated heavy rain and flooding, frequent lightning, and tornadoes. Thunderstorms rise in dramatic fashion to about the same altitude as the high cloud near the hurricane's center, and are made up of individual cells that are typically less than 20 km in diameter. This image shows a number of these cells, some fairly isolated, and others connected together. Their three-dimensional structure is clearly apparent in this stereo view.

    MISR was built and is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Office of Earth Science

  17. Quality in Higher Education: United Arab Emirates Perspective

    ERIC Educational Resources Information Center

    Soomro, Tariq Rahim; Ahmad, Reyaz

    2012-01-01

    Quality in higher education is the major concern among researchers. Managing quality in higher education in a multicultural population with different approaches is not only challenging but an uphill task. This paper will focus on quality concern in higher education keeping in view, the United Arab Emirates (UAE) perspectives. A model to maintain…

  18. The Outsourcing of Classroom Instruction in Higher Education

    ERIC Educational Resources Information Center

    Schibik, Timothy; Harrington, Charles

    2004-01-01

    Many constituencies external to higher education have begun promoting greater accountability. This view advocates a closer focus on the bottom line and that universities should utilise a more business-like model. One major outgrowth of this paradigm shift has been the seemingly recent emergence of outsourcing in higher education. Higher education…

  19. The Outsourcing of Classroom Instruction in Higher Education

    ERIC Educational Resources Information Center

    Schibik, Timothy; Harrington, Charles

    2004-01-01

    Many constituencies external to higher education have begun promoting greater accountability. This view advocates a closer focus on the bottom line and that universities should utilise a more business-like model. One major outgrowth of this paradigm shift has been the seemingly recent emergence of outsourcing in higher education. Higher education…

  20. ViewMaps and calibration in the SIunits package

    SciTech Connect

    Mark Fischler

    2002-01-02

    The SIunits package allows for the use of world views other than the standard (std) view of dimensional quantities length, time, mass, current, temperature, and so forth. A commonly used world view says ''we work in units where c = 1,'' for example. The package must do the work to support that new relativistic world view. In this note, I want to provide concrete answers to several questions: What set of statements defines a world view; What does the SIunits Package need to know to be able to support each world view; How does this information appear in the files implementing SIunits; How can this information be derived from the defining statements, in the general case; and What facility is placed into the SIunits package to derive the needed information? An earlier document, ''World-Views in the SIunits Package,'' addressed these issues, but in the context of the needs of the earlier version of SIunits. As a starting point, let me describe the std world view as having N{sub d} dimensioned units labeled f{sub {alpha}}. Thus f{sub 1} is a meter, f{sub 2} a kilogram, f{sub 3} a second, and so forth. N{sub d} is seven but that is moot; were we to eliminate Luminosity and/or Amount of Substance, for instance, the arguments in this note would remain unchanged. And in fact for the purposes of this document we will eliminate those two, to keep any matrices displayed to a reasonable size.

  1. Viewing Sexually-Explicit Materials Alone or Together: Associations with Relationship Quality

    PubMed Central

    Maddox, Amanda M.; Rhoades, Galena K.; Markman, Howard J.

    2010-01-01

    This study investigated associations between viewing sexually-explicit material (SEM) and relationship functioning in a random sample of 1291 unmarried individuals in romantic relationships. More men (76.8%) than women (31.6%) reported that they viewed SEM on their own, but nearly half of both men and women reported sometimes viewing SEM with their partner (44.8%). Measures of communication, relationship adjustment, commitment, sexual satisfaction, and infidelity were examined. Individuals who never viewed SEM reported higher relationship quality on all indices than those who viewed SEM alone. Those who viewed SEM only with their partners reported more dedication and higher sexual satisfaction than those who viewed SEM alone. The only difference between those who never viewed SEM and those who viewed it only with their partners was that those who never viewed it had lower rates of infidelity. Implications for future research in this area as well as for sex therapy and couple therapy are discussed. PMID:20039112

  2. Stereoscopic optical viewing system

    DOEpatents

    Tallman, C.S.

    1986-05-02

    An improved optical system which provides the operator with a stereoscopic viewing field and depth of vision, particularly suitable for use in various machines such as electron or laser beam welding and drilling machines. The system features two separate but independently controlled optical viewing assemblies from the eyepiece to a spot directly above the working surface. Each optical assembly comprises a combination of eye pieces, turning prisms, telephoto lenses for providing magnification, achromatic imaging relay lenses and final stage pentagonal turning prisms. Adjustment for variations in distance from the turning prisms to the workpiece, necessitated by varying part sizes and configurations and by the operator's visual accuity, is provided separately for each optical assembly by means of separate manual controls at the operator console or within easy reach of the operator.

  3. REACTOR VIEWING APPARATUS

    DOEpatents

    Monk, G.S.

    1959-01-13

    An optical system is presented that is suitable for viewing objects in a region of relatively high radioactivity, or high neutron activity, such as a neutronic reactor. This optical system will absorb neutrons and gamma rays thereby protecting personnel fronm the harmful biological effects of such penetrating radiations. The optical system is comprised of a viewing tube having a lens at one end, a transparent solid member at the other end and a transparent aqueous liquid completely filling the tube between the ends. The lens is made of a polymerized organic material and the transparent solid member is made of a radiation absorbent material. A shield surrounds the tube betwcen the flanges and is made of a gamma ray absorbing material.

  4. Hot section viewing system

    NASA Technical Reports Server (NTRS)

    Morey, W. W.

    1984-01-01

    This report covers the development and testing of a prototype combustor viewing system. The system allows one to see and record images from the inside of an operating gas turbine combustor. The program proceeded through planned phases of conceptual design, preliminary testing to resolve problem areas, prototype design and fabrication, and rig testing. Successful tests were completed with the viewing system in the laboratory, in a high pressure combustor rig, and on a Pratt and Whitney PW20307 jet engine. Both film and video recordings were made during the tests. Digital image analysis techniques were used to enhance images and bring out special effects. The use of pulsed laser illumination was also demonstrated as a means for observing liner surfaces in the presence of luminous flame.

  5. Stereoscopic optical viewing system

    DOEpatents

    Tallman, Clifford S.

    1987-01-01

    An improved optical system which provides the operator a stereoscopic viewing field and depth of vision, particularly suitable for use in various machines such as electron or laser beam welding and drilling machines. The system features two separate but independently controlled optical viewing assemblies from the eyepiece to a spot directly above the working surface. Each optical assembly comprises a combination of eye pieces, turning prisms, telephoto lenses for providing magnification, achromatic imaging relay lenses and final stage pentagonal turning prisms. Adjustment for variations in distance from the turning prisms to the workpiece, necessitated by varying part sizes and configurations and by the operator's visual accuity, is provided separately for each optical assembly by means of separate manual controls at the operator console or within easy reach of the operator.

  6. High Resolution Ceres View

    NASA Image and Video Library

    2017-09-20

    This orthographic projection shows dwarf planet Ceres as seen by NASA's Dawn spacecraft. The projection is centered on Occator Crater, home to the brightest area on Ceres. Occator is centered at 20 degrees north latitude, 239 degrees east longitude. This image was made from views Dawn took during its low-altitude mapping orbit, at about 240 miles (385 kilometers) above the surface. The image resolution is about 460 feet (140 meters) per pixel. https://photojournal.jpl.nasa.gov/catalog/PIA21906

  7. Assassination: A Military View.

    DTIC Science & Technology

    1987-03-23

    States and examine our national policy . National Policy The United States recognizes the stipulations of the 1907 hague Con- vention IV which, in...legal view is briefly conducted. The impact of assassination upon the United States is also reviewed. The conclusion provides some hope that by...nation upon the United States Is also reviewed. The conclusion provides some hope that by knowing better what assassination is, and collaterally

  8. Neutron radiographic viewing system

    NASA Technical Reports Server (NTRS)

    1972-01-01

    The design, development and application of a neutron radiographic viewing system for use in nondestructive testing applications is considered. The system consists of a SEC vidicon camera, neutron image intensifier system, disc recorder, and TV readout. Neutron bombardment of the subject is recorded by an image converter and passed through an optical system into the SEC vidicon. The vidicon output may be stored, or processed for visual readout.

  9. JSC Aerial View

    NASA Technical Reports Server (NTRS)

    1982-01-01

    This North-looking view shows some of the Johnson Space Center's central buildings and facilities neighboring its Project Management Facility (Building 1) from which this scene was photographed. The Houston-based Mission Control Center is in the center of the frame. Visible buildings surrounding the mall area include the Flight Operations Facility, Crew Systems Laboratory, Photographic Technology Laboratory, Technical Services shop, branch cafeteria, Mission Control Center office wing and the Central Data Office.

  10. Southern State Governments and Higher Education for Negroes

    ERIC Educational Resources Information Center

    Godwin, Winfred L.

    1971-01-01

    Southern state governments bear a heavy responsibility in view of the historic dualism at all levels of education in insuring equal higher educational opportunities and eliminating discrimination. (Author/SD)

  11. Southern State Governments and Higher Education for Negroes

    ERIC Educational Resources Information Center

    Godwin, Winfred L.

    1971-01-01

    Southern state governments bear a heavy responsibility in view of the historic dualism at all levels of education in insuring equal higher educational opportunities and eliminating discrimination. (Author/SD)

  12. View factor computer program (program view) user's manual

    NASA Technical Reports Server (NTRS)

    Puccinelli, E. F.

    1973-01-01

    The purpose of program VIEW is to compute view factors between specified surfaces and to be compatible with level 15.5 of the NASTRAN structural analysis program. Program VIEW is a modification of a (finite element) view factor computation program called RAVFAC. VIEW is designed to run on an IBM System/360 operating under OS (operating system), with a minimum region size of 110 K bytes. The actual computation of view factors is still performed exactly as it was in the original version of RAVFAC. In developing VIEW, RAVFAC was modified to satisfy the following compatibility requirements: (1) accept finite element input which can also be used as input to NASTRAN, (2) produce output (view factors) in a format which can be used as input to NASTRAN, and (3) follow NASTRAN program design so that in the future VIEW can be incorporated into NASTRAN as a subroutine. The VIEW program permits computation of the view factors between surfaces, taking into account the presence of any intermediate surfaces. VIEW also computes these view factors either by contour integration or by finite difference (double summation) methods.

  13. Moderate views of abortion.

    PubMed

    Sumner, L W

    1997-01-01

    This essay offers a moderate view of abortion that imposes a time limit for unrestricted abortion and specific indications for later abortions. The introduction notes that the discussion will provide a defense for this policy based on a moral analysis but that other options for moderates, especially options provided by freestanding views (the defense of which does not rest on any prior commitment about the morality of abortion), will also be considered. The next section considers the moral status of the fetus grounded in a criterion of moral standing that stipulates the necessary characteristics to achieve moral standing. This discussion concludes that a fetus acquires moral standing only when it becomes sentient. Section 3 moves the argument from ethics to politics to prove that a moderate policy must place no limitations on abortion before the time the fetus becomes sentient because before that time the fetus has no interest for the state to protect. The final section notes that some pro-choice advocates may be happier with the moderate policy proposed than with its controversial defense based on the moral status of the fetus and that another defense of a moderate policy could be based on a finding that the ethical issue can not be decided and that no view about abortion ethics is more reasonable than any other. The essay concludes that the ethical debate is ultimately unavoidable.

  14. MGS Views of Nirgal Vallis

    NASA Technical Reports Server (NTRS)

    1997-01-01

    At 3:08:30 AM on September 21, 1997, the MOC field of view swept across the highland valley network Nirgal Vallis at 28.5oS, 41.6 W. Although the MGS spacecraft was at an altitude of about 400 km (250 miles), the MOC was pointed obliquely across the planet at about 35o, so the distance to Nirgal Vallis was closer to 800 km (500 miles). At that range and viewing angle, the MOC field of view was about 16 km (10 miles) wide, and the resolution was about 9 meters (30 feet) per pixel. The acquired image is 36 km (23 miles) long.

    Five images are shown above:

    (A) is an excerpt from the USGS MDIM, roughly 180 km (112 mile) square. The small box outlines the MOC image acquisition.

    (B) is MOC frame P006_05, shown here at reduced resolution because the full image is almost 7 MBytes in size. Because the MOC acquires its images one line at a time, the cant angle towards the sun-lit portion of the planet, the spacecraft orbital velocity, and the spacecraft rotational velocity combined to significantly distort the image. However, even in this reduced resolution version, dunes can be seen in the canyon and in areas on the upland surface around the canyon.

    (C) shows a portion of P006_05 at the full resolution of the data. This view shows the dunes more clearly, and also illustrates better the distortion introduced by the method of data acquisition.

    (D) shows P006_05 skewed and rotated to the perspective that MOC was viewing at the time the image was taken.

    (E) shows a full-resolution version of a portion of the rotated perspective view.

    Nirgal Vallis is one of a number of canyons called valley networks or runoff channels. Much of the debate concerning the origin of these valleys centers on whether they were formed by water flowing across the surface, or by collapse and upslope erosion associated with groundwater processes. At the resolution of this image, it is just barely possible to discern an interwoven pattern of lines on the highland surrounding the

  15. Applications of Multiview Tensors in Higher Dimensions

    NASA Astrophysics Data System (ADS)

    Bertolini, Marina; Besana, Gianmario; Turrini, Cristina

    This chapter is devoted to applications of multiview tensors, in higher dimension, to projective recostruction of segmented or dynamic scenes. Particular emphasis is placed on the analysis of critical configurations and their loci in this context, i.e. configurations of chosen scene-points and cameras that turn out to prevent successful reconstruction or allow for multiple possible solutions giving rise to ambiguities. A general geometric set up for higher dimensional spaces ad projections is firstly recalled. Examples of segmented and dynamic scenes, interpreted as static scenes in higher dimensional projective spaces, are then considered, following Shashua and Wolf. A theoretical approach to multiview tensors in higher dimension is presented, according to Hartley and Schaffalitzky. Using techniques of multilinear algebra and proper formalized language of algebraic geometry, a complete description of the geometric structure of the loci of critical configurations in any dimension is given. Supporting examples are supplied, both for reconstruction from one view and from multiple views. In an experimental context, the following two cases are realized as static scenes in P4: 3D points lying on two bodies moving relatively to each other by pure translation and 3D points moving independently along parallel straight lines with constant velocities. More explicitly, algorithms to determine suitable tensors used to reconstruct a scene in P4: from three views are implemented with MATLAB. A number of simulated experiments are finally performed in order to prove instability of reconstruction near critical loci in both cases described above.

  16. Interior view of first floor with elevator in background. Note ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Interior view of first floor with elevator in background. Note that floor was originally two feet higher, but was dug out for new concrete floor. - Bates Hoist Machine, 1512 Fleet Street, Baltimore, Independent City, MD

  17. 12. VIEW OF REMOTELY OPERATED EQUIPMENT. OPERATORS VIEWED THE EQUIPMENT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. VIEW OF REMOTELY OPERATED EQUIPMENT. OPERATORS VIEWED THE EQUIPMENT THROUGH A WATER-FILLED WINDOW. (10/8/81) - Rocky Flats Plant, Plutonium Recovery Facility, Northwest portion of Rocky Flats Plant, Golden, Jefferson County, CO

  18. 14. Water treatment plant interior view of chlorination room. View ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. Water treatment plant interior view of chlorination room. View to N - Fort Benton Water Treatment Plant, Filtration Plant, Lots 9-13 of Block 7, Fort Benton Original Townsite at Missouri River, Fort Benton, Chouteau County, MT

  19. 3. VIEW OF EAST SOUTHEAST, GROUND LEVEL VIEW OF ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. VIEW OF EAST - SOUTHEAST, GROUND LEVEL VIEW OF APPROACH SPANS, NORTH END OF BRIDGE, MAIN SPANS IN BACKGROUND - Buffalo River Bridge, Spanning Buffalo River on U.S. Highway 65, Marshall, Searcy County, AR

  20. 8. VIEW EAST, INTERIOR VIEW OF BUILDING 11, BASEMENT, FULLER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. VIEW EAST, INTERIOR VIEW OF BUILDING 11, BASEMENT, FULLER VACUUM PUMPS - Naval Surface Warfare Center, Supersonic Wind Tunnel Building, Bounded by Clara Barton Parkway & McArthur Boulevard, Silver Spring, Montgomery County, MD

  1. TOPOGRAPHIC VIEW OF THE STATE FORESTER'S COMPLEX, VIEW LOOKING SOUTHWEST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    TOPOGRAPHIC VIEW OF THE STATE FORESTER'S COMPLEX, VIEW LOOKING SOUTHWEST FROM STATE STREET, WITH THE K.O.G BUILDING (KEEP OREGON GREEN) IN THE FOREGROUND. - Oregon State Forester's Office Complex, 2600 State Street, Salem, Marion, OR

  2. General perspective view of the Grande Ronde River Bridge, view ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    General perspective view of the Grande Ronde River Bridge, view looking southwest - Grande Ronde River Bridge, Sprnning Grande Ronde River on Old Oregon Trail Highway (Oregon Route 6), La Grande, Union County, OR

  3. General perspective view of the Grande Ronde River Bridge, view ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    General perspective view of the Grande Ronde River Bridge, view looking southeast - Grande Ronde River Bridge, Sprnning Grande Ronde River on Old Oregon Trail Highway (Oregon Route 6), La Grande, Union County, OR

  4. Topographic view of the Grande Ronde River Bridge, view looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Topographic view of the Grande Ronde River Bridge, view looking south - Grande Ronde River Bridge, Sprnning Grande Ronde River on Old Oregon Trail Highway (Oregon Route 6), La Grande, Union County, OR

  5. Perspective view of the Oregon Trunk Railway Freight Depot, view ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Perspective view of the Oregon Trunk Railway Freight Depot, view looking west at south end of building - Oregon Trunk Railway Freight Depot, Southwest First Street & Cascade Avenue, Redmond, Deschutes County, OR

  6. GENERAL PERSPECTIVE VIEW OF THE COMPLEX, VIEW LOOKING NORTHWEST AT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    GENERAL PERSPECTIVE VIEW OF THE COMPLEX, VIEW LOOKING NORTHWEST AT THE OREGON FORESTER'S OFFICE BUILDING, WITH MILL CREEK IN THE FOREGROUND. - Oregon State Forester's Office Complex, 2600 State Street, Salem, Marion, OR

  7. 1. General view of Oregon Electric Railway, view looking north ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. General view of Oregon Electric Railway, view looking north at Hedges Creek trestle. - Oregon Electric Railroad, Hedges Creek Trestle, Garden Home to Wilsonville Segment, Milepost 38.7, Garden Home, Washington County, OR

  8. 2. General view of the Tualatin River Railroad Bridge, view ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. General view of the Tualatin River Railroad Bridge, view looking southwest - Oregon Electric Railroad, Tualatin River Bridge, Garden Home to Wilsonville Segment, Milepost 35.3, Wilsonville, Clackamas County, OR

  9. 4. Approach view of the Tualatin River Railroad Bridge, view ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Approach view of the Tualatin River Railroad Bridge, view looking south - Oregon Electric Railroad, Tualatin River Bridge, Garden Home to Wilsonville Segment, Milepost 35.3, Wilsonville, Clackamas County, OR

  10. 3. General view of the Tualatin River Railroad Bridge, view ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. General view of the Tualatin River Railroad Bridge, view looking southwest - Oregon Electric Railroad, Tualatin River Bridge, Garden Home to Wilsonville Segment, Milepost 35.3, Wilsonville, Clackamas County, OR

  11. View northeast toward west side of building 68. View partially ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View northeast toward west side of building 68. View partially obscured by automobiles and storage structures. - Naval Air Station North Island, Seaplane Hangars, Roe Street, North Island, San Diego, San Diego County, CA

  12. 1. CLUBHOUSE. CONTEXT VIEW OF FRONT (SOUTHEAST) FACADE. VIEW TO ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. CLUBHOUSE. CONTEXT VIEW OF FRONT (SOUTHEAST) FACADE. VIEW TO NORTH. - Rainbow Hydroelectric Facility, Clubhouse, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

  13. 59. SIDE VIEW OF TENSION CARRIAGE: Side view towards the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    59. SIDE VIEW OF TENSION CARRIAGE: Side view towards the south of the California Street cable's tension carriage. - San Francisco Cable Railway, Washington & Mason Streets, San Francisco, San Francisco County, CA

  14. VIEW OF ELM DRIVE WITH FACILITY 708 ON LEFT. VIEW ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF ELM DRIVE WITH FACILITY 708 ON LEFT. VIEW FACING EAST - Camp H.M. Smith and Navy Public Works Center Manana Title VII (Capehart) Housing, Intersection of Acacia Road and Brich Circle, Pearl City, Honolulu County, HI

  15. VIEW OF RETAINING WALL BEHIND FACILITY 532. VIEW FACING EAST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF RETAINING WALL BEHIND FACILITY 532. VIEW FACING EAST - Camp H.M. Smith and Navy Public Works Center Manana Title VII (Capehart) Housing, Intersection of Acacia Road and Brich Circle, Pearl City, Honolulu County, HI

  16. VIEW OF BIRCH CIRCLE, FROM INTERSECTION WITH DATE DRIVE. VIEW ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF BIRCH CIRCLE, FROM INTERSECTION WITH DATE DRIVE. VIEW FACING WEST - Camp H.M. Smith and Navy Public Works Center Manana Title VII (Capehart) Housing, Intersection of Acacia Road and Brich Circle, Pearl City, Honolulu County, HI

  17. VIEW OF ELM DRIVE WITH NORFOLK PINE ON RIGHT. VIEW ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF ELM DRIVE WITH NORFOLK PINE ON RIGHT. VIEW FACING WEST - Camp H.M. Smith and Navy Public Works Center Manana Title VII (Capehart) Housing, Intersection of Acacia Road and Brich Circle, Pearl City, Honolulu County, HI

  18. VIEW OF NORTHWEST BEND IN BIRCH CIRCLE. VIEW FACING WEST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF NORTHWEST BEND IN BIRCH CIRCLE. VIEW FACING WEST - Camp H.M. Smith and Navy Public Works Center Manana Title VII (Capehart) Housing, Intersection of Acacia Road and Brich Circle, Pearl City, Honolulu County, HI

  19. VIEW OF TERRACING BEHIND UNIT 608 CEDAR DRIVE. VIEW FACING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF TERRACING BEHIND UNIT 608 CEDAR DRIVE. VIEW FACING EAST - Camp H.M. Smith and Navy Public Works Center Manana Title VII (Capehart) Housing, Intersection of Acacia Road and Brich Circle, Pearl City, Honolulu County, HI

  20. VIEW OF PLAYGROUND #2 ON CEDAR DRIVE. VIEW FACING NORTHWEST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF PLAYGROUND #2 ON CEDAR DRIVE. VIEW FACING NORTHWEST - Camp H.M. Smith and Navy Public Works Center Manana Title VII (Capehart) Housing, Intersection of Acacia Road and Brich Circle, Pearl City, Honolulu County, HI