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1

Investigation of low-Z Coster-Kronig transitions by means of Auger and photoelectron spectroscopy  

NASA Technical Reports Server (NTRS)

Experimental intensity ratios of Auger transitions for Co, Ni, Cu, and Zn as well as the relative L sub 2 and L sub 3 level widths of Cu and Zn, derived from their photoelectron spectra, are presented. Evidence is presented that a great deal of vacancy reorganization took place following photoionization and prior to Auger emission. These reorganizations are assumed to be due to Coster-Kronig transitions f sub 23. These results are compared with theoretical calculations and agree with predicted discontinuity at Z = 30 where f sub 23 transitions become energetically impossible.

Yin, L. I.; Tsang, T.; Adler, I.

1972-01-01

2

Coster-Kronig transition probability f{sub 23} in gold atoms  

SciTech Connect

We have investigated the Coster-Kronig transition probability f{sub 23} in gold atoms (nuclear charge Z=79) using the L x-ray versus K x-ray coincidence method. K vacancies were created using synchrotron radiation and the cascade decays were measured using germanium x-ray detectors. We find f{sub 23}=0.112{+-}0.004 which is somewhat lower than the recent coincidence measurement of Santra et al. which yielded f{sub 23}=0.119{+-}0.003. Our result is smaller than the values calculated by McGuire (f{sub 23}=0.132) and Puri et al. (f{sub 23}=0.129) but agrees with our own single-configuration Pauli-Fock calculation, which gives f{sub 23}=0.114, as well as the global set of prior experimental data.

Dunford, R. W.; Kanter, E. P.; Kraessig, B.; Southworth, S. H.; Young, L. [Argonne National Laboratory, Argonne, Illinois 60439 (United States); Mokler, P. H. [Institut fur Atom- and Molekuelphysik, Justus-Liebig University, D35392 Giessen (Germany); GSI, Planckstrasse 1, D64291 Darmstadt (Germany); Stoehlker, Th. [GSI, Planckstrasse 1, D64291 Darmstadt (Germany); Cheng, S. [Department of Physics, University of Toledo, Toledo, Ohio 43606 (United States); Kochur, A. G.; Petrov, I. D. [Rostov State University of Transport Communication, Rostov-na-Donu, 344038 (Russian Federation)

2006-12-15

3

Effects of electron correlation, exchange, and relaxation on x-ray, Auger, and Coster-Kronig transitions  

SciTech Connect

The first topic deals with Auger and radiative deexcitation of highly stripped phosphorus atoms. X-ray wavelengths, Auger energies, and decay rates have been calculated for various states of the P/sup 4 +/ ion, with configurations (1s/sup 2/2s/sup 2/2p/sup 5/)3s3p, 3s3d, 3s/sup 2/, 3p/sup 2/, and 3d/sup 2/. Intermediate coupling and configuration interaction have been taken into account. The energies and decay rates are found to be strongly affected by configuration interaction. The theoretical results are compared with recent observations in ion-atom collision experiments. Good agreement with measured spectra is found, and the calculations characterize a number of lines that had not previously been identified. The second topic relates to the effects of exchange, relaxation, and electron correlation on the L/sub 1/-L/sub 23/M/sub 1/ Coster-Kronig spectrum of argon. The present calculation leads to good agreement with experimental transition energies and removes some of the discrepancies in transition rates. The total calculated transition rates are still about a factor of two higher than the measured rates. Relaxation tends to minimize the differences between individual L/sub 1/-L/sub 23/M/sub 1/(/sup 1/P) and L/sub 1/-L/sub 23/M/sub 1/(/sup 3/P) transition rates. The initial- and final-ionic-configuration interaction reduces the total decay rate by approx.35%. Inclusion of complete relaxation increases the total rate, however, by approx.1.5% rather than reducing it, with respect to calculations without relaxation. The exchange interaction also increases this rate by approx.9%.

Karim, K.R.

1983-01-01

4

Theory of Coster-Kronig preceded Auger processes in solids  

SciTech Connect

We propose the foundations of an extended Auger line-shape analysis of solids aiming to include three-hole features such as the ones due to core-valence-valence Auger decays following Coster-Kronig transitions. In transition metals, such features show up as intense high binding energy satellites of the diagrammatic core-valence-valence lines. Our theory is grounded on the full one-step approach, but to keep the complications to a minimum, in the present exploratory paper, the valence band is assumed fully below the Fermi level. In this way, explicit model calculations can be confidently based on a three-step approach. The line-shape analysis then amounts to compute a three-body Green's function, which, however, is much less known than one- and two-body ones. Our treatment covers the whole range between weak and strong correlations. Furthermore, we show that the relevant physics can be captured by a transparent, computationally simple closed formula. We find that, in general, the satellites cover separated spectral regions with three-hole multiplets, shifted and broadened two-hole features, and distorted bandlike continua.

Cini, Michele; Ugenti, Simona [Dipartimento di Fisica, Universita di Roma Tor Vergata, Via della Ricerca Scientifica 1, I-00133 Rome (Italy); Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, Via E. Fermi 40, 00044 Frascati (Italy); Perfetto, Enrico [Unita CNISM, Universita di Roma Tor Vergata, Via della Ricerca Scientifica 1, I-00133 Rome (Italy); Stefanucci, Gianluca [Dipartimento di Fisica, Universita di Roma Tor Vergata, Via della Ricerca Scientifica 1, I-00133 Rome (Italy)

2007-11-15

5

Theoretical L-shell Coster-Kronig energies 11 or equal to z or equal to 103  

NASA Technical Reports Server (NTRS)

Relativistic relaxed-orbital calculations of L-shell Coster-Kronig transition energies have been performed for all possible transitions in atoms with atomic numbers. Hartree-Fock-Slater wave functions served as zeroth-order eigenfunctions to compute the expectation of the total Hamiltonian. A first-order approximation to the local approximation was thus included. Quantum-electrodynamic corrections were made. Each transition energy was computed as the difference between results of separate self-consistent-field calculations for the initial, singly ionized state and the final two-hole state. The following quantities are listed: total transition energy, 'electric' (Dirac-Hartree-Fock-Slater) contribution, magnetic and retardation contributions, and contributions due to vacuum polarization and self energy.

Chen, M. H.; Crasemann, B.; Huang, K. N.; Aoyagi, M.; Mark, H.

1976-01-01

6

Resonant 3d, 3p and 3s Photoemission in Transition Metal Oxides Predicted at 2p Threshold  

NASA Astrophysics Data System (ADS)

We present calculated 3d, 3p and 3s resonant photoemission (RPE) spectra in the transition metal (TM) compounds CuO, NiO, CoO, FeO, MnO and TiO2 at TM 2p core threshold on the basis of a cluster model. Our model includes the intraatomic multipole electron-electron interactions and the hybridization between transition metal ions and ligand. The imaginary part of the self-energy matrix of the intermediate state is calculated by taking into account the 2p3d3d, 2p3d3p, 2p3d3s and 2p3p3p Coster-Kronig decay, which guarantees a sum rule between the integrated RPE spectra and absorption spectra. The dependence of RPE on the incident photon energy tuned to various multiplet structures of TM 2p absorption spectra is shown to be useful to identify the second order optical process, which is argued to include much Auger decay component. It is also shown, by a comparison with experiment, that the present 3d RPE contributes to a removal of discrepancies of estimated parameter values among analyses of other spectra.

Tanaka, Arata; Jo, Takeo

1994-07-01

7

Reexamination of M2,3 atomic level widths and L1M2,3 transition energies of elements 69?Z?95  

NASA Astrophysics Data System (ADS)

We report on high-resolution measurements of the photoinduced L1M2 and L1M3 x-ray emission lines of 69Tm, 70Yb, 71Lu, 73Ta, 74W, 75Re, 77Ir, 81Tl, 83Bi, and 95Am. From the linewidths of the measured transitions an accurate set of M2 and M3 level widths is determined assuming for the L1 level widths the values reported by Raboud [P.-A. Raboud et al., Phys. Rev. APLRAAN1050-294710.1103/PhysRevA.65.022512 65, 022512 (2002)]. Furthermore, the present experimental M2,3 data set is extended to 80Hg, 90Th, and 92U, using former L1M2,3 high-resolution x-ray emission spectroscopy measurements performed by our group. A detailed comparison of the M2 and M3 level widths determined in the present work with those recommended by Campbell and Papp [J. L. Campbell and T. Papp, At. Data Nucl. Data TablesADNDAT0092-640X10.1006/adnd.2000.0848 77, 1 (2001)] and other available experimental data as well as theoretical predictions is done. The observed abrupt changes of the M2,3 level widths versus atomic number Z can be explained satisfactorily by the cutoffs and onsets of the M2M4N1, respectively M3M4N3,4,5 and M3M5N2,3 Coster-Kronig transitions deduced from the semiempirical (Z+1) approximation. As a spin-off result of this study, precise L1M2 and L1M3 transition energies are obtained for the investigated elements. A very good agreement with transition energies calculated within the many-body perturbation theory is found.

Fennane, K.; Berset, M.; Dousse, J.-Cl.; Hoszowska, J.; Raboud, P.-A.; Campbell, J. L.

2013-11-01

8

Two-center electron-electron interactions in collisions of fast Ne 7+ and Ne 6+ ions with gas atoms  

Microsoft Academic Search

Experimental and thoeretical studies of the two-center electron-electron interaction occurring during energetic ion-atom collisions are presented. Experiments were performed using the accelerator facility VICKSI at HMI, Berlin. Electron spectra from Auger and Coster-Kronig transitions following the excitation of a highly charged neon projectile have been studied by zero-degree electron spectroscopy. Various target atoms with atomic numbers ranging from 1–18 were

B. Sulik; S. Ricz; I. Kádár; G. Xiao; G. Schiwietz; K. Sommer; R. Köhrbrück; M. Grether; N. Stolterfoht

1995-01-01

9

Role of Measured Vacancy De-excitation Parameters in Proton Induced X-ray Emission  

NASA Astrophysics Data System (ADS)

The proton induced inner-shell vacancy decay process is comprised of radiative and non-radiative transitions. It is characterized by fluorescence, Auger and Coster-Kronig yields. These studies have been evolving over the last four decades, resulting in close and stringent comparisons of the measured values with the predictions of theoretical models. In view of the present scenario, we report in this paper the role of these atomic parameters for W (tungsten) and their energy dependence. Their role in understanding this phenomenon and current progress in this regard will be highlighted. Requirements and opportunities for further effort will also be discussed.

Jain, Arvind Kumar; Mohan, Harsh

2009-03-01

10

Empirical and semi-empirical interpolation of L X-ray fluorescence parameters for elements in the atomic range 50?Z?92  

NASA Astrophysics Data System (ADS)

In this study, interpolations (empirical and semi-empirical) of L sub-shell fluorescence yield and L shell Coster-Kronig transition probability values and the measured L X-ray production cross-sections, intensity ratios and L sub-shell fluorescence yield values of elements have been performed in the range of 50?Z?92. In this experimental setup, two sources (50 mCi 55Fe and 50 mCi 241Am) were used. L X-rays emitted by samples were counted by an Ultra-LEGe detector with a resolution of 150 eV at 5.9 keV.

Aylikci, V.; Kahoul, A.; Kup Aylikci, N.; Tira?o?lu, E.; Karahan, ?. H.; Abassi, A.; Dogan, M.

2015-01-01

11

A review of auger photoelectron coincidence spectroscopy  

NASA Astrophysics Data System (ADS)

The application of coincidence detection techniques produces a dramatic increase in the information obtained from particle and photon scattering studies. A clear illustration of this is given by Auger Photoelectron Coincidence Spectroscopy (APECS). By coincident detection of the ejected photoelectron and the resulting Auger electron during x-ray excited Auger spectroscopy, it is possible to distinguish the true origin of peaks and satellites within the Auger spectra. For example, it becomes possible to separate standard Auger processes from those occurring in conjunction with Coster-Kronig transitions and from those either followed or preceded by shake-off or shake-up transitions. In addition, the technique often allows the separation of overlapping series of Auger peaks, thus permitting the study of individual elements within compounds and alloys. These possibilities will be illustrated primarily by reference to APECS studies of 3d transition metal elements.

Robins, John L.

1995-04-01

12

Development of a coincidence system for the measurement of X-ray emission atomic parameters  

SciTech Connect

Preliminary results obtained in experiments carried out with an x-ray spectrometer built at the Instituto de Fisica for Atomic Physics and environmental sciences studies are presented. The experiments are based on a coincidence method for signals produced by LEGe and Si(Li) detectors. The x-ray fluorescence yields ({omega}{sub Li}) and Coster-Kronig transition probabilities (f{sub ij}) for elements with 55 {<=} Z {<=} 60 are among the quantities of interest. The method is based on the simultaneous detection of K x-rays with the LEGe detector and the L x-rays with the Si(Li) detector. The primary radiation source is an x-ray tube with Rh anode. The system was tested with the coincidence of the L x-rays from Ce with its K line, demonstrating the feasibility of the experiments.

Martinez, Filiberto; Miranda, Javier [Instituto de Fisica, Universidad Nacional Autonoma de Mexico, Apartado Postal 20-364, 01000 Mexico, D.F (Mexico)

2013-07-03

13

Development of a coincidence system for the measurement of X-ray emission atomic parameters  

NASA Astrophysics Data System (ADS)

Preliminary results obtained in experiments carried out with an x-ray spectrometer built at the Instituto de Física for Atomic Physics and environmental sciences studies are presented. The experiments are based on a coincidence method for signals produced by LEGe and Si(Li) detectors. The x-ray fluorescence yields (?Li) and Coster-Kronig transition probabilities (fij) for elements with 55 ? Z ? 60 are among the quantities of interest. The method is based on the simultaneous detection of K x-rays with the LEGe detector and the L x-rays with the Si(Li) detector. The primary radiation source is an x-ray tube with Rh anode. The system was tested with the coincidence of the L x-rays from Ce with its K line, demonstrating the feasibility of the experiments.

Martínez, Filiberto; Miranda, Javier

2013-07-01

14

PIXEF: the Livermore PIXE spectrum analysis package  

NASA Astrophysics Data System (ADS)

PIXEF (for PIXE-fit) is a proton-induced X-ray emission (PIXE) data analysis program designed for analyzing medium to heavy element matrices while retaining the capability to treat lower atomic number targets. Using nonlinear least squares fitting techniques, algorithms have been developed or modified for both fitting the characteristic X-ray peaks and representing the associated bremsstrahlung and ?-ray background. Self-absorption and secondary fluorescence are explicitly determined for K-shell and L-subshell X-rays. Data bases have been created or improved, where necessary, from reliable current literature values or by direct measurement for element mass attenuation coefficients, photoionization and proton ionization cross sections, Coster-Kronig transition probabilities, fluorescence yields, and relative line intensities. The utility of the program is demonstrated with PIXE spectra obtained at Livermore.

Antolak, A. J.; Bench, G. S.

1994-05-01

15

Structure of the X-ray emission CuL{alpha}-line in YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} and CuO based on the SCF X{alpha}-SW calculation  

SciTech Connect

Using the SCF X{alpha}-SW method the authors have calculated the final status of the X-ray L{alpha}-transition of the CuO{sub 4}{sup 6{minus}} cluster modeling the nearest environment of the copper atom (one of the two types) in YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} and the nearest environment of copper in CuO. The energies of transitions forming in L{alpha}-spectrum (with or without many-electron excitations) have been calculated. It has been shown that for interpretation of the main singularities of the X-ray emission L{alpha}-spectrum, not only should the Coster-Kronig transitions be considered but also the shake-up excitation 2b{sub 1g} {yields} 3b{sub 1g} processes and the multiple ionization satellites 3p{sup {minus}1}. An experimental scheme has been suggested that allows separation of the effects of different many-electron processes on the L{alpha}-spectrum.

Fomin, E.S.; Murakhtanov, V.V.

1994-01-01

16

Widths of atomic 4s and 4p vacancy states, 46 less than or equal to Z less than or equal to 50  

NASA Technical Reports Server (NTRS)

Auger and X-ray photoelectron spectra involving N1, N2, and N3 vacancy states of Pd, Ag, Cd, In, and Sn were measured and compared with results of free atom calculations. As previously observed in Cu and Zn Auger spectra that involve 3d-band electrons, free-atom characteristics with regard to widths and structure were found in the Ag and Cd M4-N4,5N4,5 and M5-N4,5N4,5 Auger spectra that arise from transitions of 4d-band electrons. Theoretical N1 widths computed with calculated free-atom Auger energies agree well with measurements. Theory however predicts wider N2 than N3 vacancy states (as observed for Xe), while the measured N2 and N3 widths are nearly equal to each other and to the average of the calculated N2 and N3 widths. The calculations are made difficult by the exceedingly short lifetime of some 4p vacancies and by the extreme sensitivity of super-Coster-Kronig rates, which dominate the deexcitation, to the transition energy and to the fine details of the atomic potential.

Hsiungchen, M.; Crasemann, B.; Yin, L. I.; Tsang, T.; Adler, I.

1975-01-01

17

Alignment of Mi (i=3-5) subshell vacancy states in Au79 , Bi83 , Th90 , and U92 following photoionization by unpolarized Mn K x rays  

NASA Astrophysics Data System (ADS)

Alignment of the M3(J=(3)/(2)) , M4(J=(3)/(2)) , and M5(J=(5)/(2)) subshell vacancy states produced following photoionization in the Mi (i=1-5) subshells of Au79 , Bi83 , Th90 , and U92 have been investigated through angular distribution of the subsequently emitted M x rays. The unpolarized Mn K x rays (EKX=5.97keV) from the Fe55 radioisotope were used to ionize the Mi subshells and the emitted M x rays were measured under vacuum using a low energy Ge detector. The M x-ray spectra taken at different emission angles were normalized using the isotropically emitted K shell (J=(1)/(2)) x rays measured simultaneously from a V23 thin target placed adjoining the M x-ray target. The present precision measurements infer that anisotropy in the M??? x-ray emission shows trends and order of magnitude predicted by theoretical calculations, i.e., anisotropy parameter (?2)˜0.01 . It clearly rules out strong angular dependence of the M x-ray emission reported earlier. The M x-ray fluorescence integral cross sections have been deduced from the measurements at an emission angle (?)=126° , where the second-order Legendre polynomial term, P2(cos?) , associated with the angular distribution polynomial is zero. The measured fluorescence cross sections are compared with those deduced using theoretical Mi subshell photoionization cross sections, fluorescence yields, and Coster-Kronig transition probabilities.

Kumar, Sanjeev; Sharma, Veena; Mehta, Devinder; Singh, Nirmal

2008-03-01

18

A new fundamental parameter based calibration procedure for micro X-ray fluorescence spectrometers  

NASA Astrophysics Data System (ADS)

Fundamental parameter based quantification of X-ray fluorescence (XRF) measurement data requires an accurate knowledge of the spectrometer parameters, including the spectral distribution of the excitation radiation. In case of micro-XRF where a polycapillary optic is utilized in the excitation channel this distribution is changed due to the transmission properties of the lens. A new calibration procedure, based on fluorescence data of thin standard samples, was developed to determine the excitation spectrum, i.e., the product of the X-ray tube spectrum and the transmission of the used X-ray optic of a micro-XRF setup. The calibration result was validated by the quantitative analyses of certified multi-element reference standards and shows uncertainties in the order of 2% for main components, 10% for minor elements and 25% for trace elements. The influence of secondary order effects like Coster-Kronig transitions and cascade effects is analyzed and the accuracy of fundamental parameters in common databases is discussed.

Wolff, Timo; Malzer, Wolfgang; Mantouvalou, Ioanna; Hahn, Oliver; Kanngießer, Birgit

2011-02-01

19

The polarization of X-rays and magnetic photoionization cross-sections for L3 sub-shell.  

PubMed

The alignment of atoms with inner-shell vacancies resulting from ionization by photons was investigated by measuring the anisotropic emission of L shell X-ray lines. The X-ray line intensities were measured using an Si(Li) detector and radioisotope photon source in various emission angles. It was observed from measured intensities that Lalpha and Ll X-ray intensities for the L(3) sub-state depended on the emission angle, meaning that Lalpha and Ll X-rays had an anisotropic spatial distribution. Thus, the Lalpha to Ll intensity ratios for a set of elements were determined and alignment parameters for each element were obtained using these ratios. Also, the empirical values of the L(3) magnetic sub-state photoionization cross-sections for m(j)=3/2 and 1/2 were evaluated using the determined alignment parameters, sub-state photoionization cross-sections and the Coster-Kronig transition probabilities. PMID:19231211

Han, I; Sahin, M; Demir, L

2009-06-01

20

The origin of the resistance change in GeSbTe films  

SciTech Connect

Amorphous Ge{sub 2}Sb{sub 2}Te{sub 5} (a-GST) films were deposited by ion beam sputtering deposition. Extended x-ray absorption fine structure (EXAFS) data confirmed the existence of the Ge-Ge homopolar bonds in the films. Raman spectra also indicated that the Ge tetrahedral coordination in the a-GST film disappeared after an annealing treatment above 220 deg. C. Resonantly excited Ge L{sub 2,3} x-ray emission spectra (which probe occupied Ge 3d4s-electronic states) show that the phase change from the amorphous to crystalline state is accompanied by a reduction in the Ge I(L{sub 2})/I(L{sub 3}) intensity ratio due to a L{sub 2}L{sub 3}N Coster-Kronig transition, indicating that the number of carriers is increased in the Ge 4sp valence state. These findings constitute direct evidence for the contribution of the Ge electronic states to the resistivity change.

Jang, Moon Hyung [Atomic-scale Surface Science Research Institute, Yonsei University, Seoul 120-749 (Korea, Republic of); Park, Seung Jong; Park, Sung Jin [Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749 (Korea, Republic of); Cho, Mann-Ho [Atomic-scale Surface Science Research Institute, Yonsei University, Seoul 120-749 (Korea, Republic of); Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749 (Korea, Republic of); Kurmaev, E. Z.; Finkelstein, L. D. [Ural Division, Institute of Metal Physics, Russian Academy of Sciences, 620441 Yekaterinburg (Russian Federation); Chang, Gap Soo [Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon SK S7N 5E2 (Canada)

2010-10-11

21

Transiting Exoplanets  

NASA Astrophysics Data System (ADS)

1. Our solar system from afar; 2. Exoplanet discoveries by the transit method; 3. What the transit lightcurve tells us; 4. The transiting exoplanet population; 5. Transmission spectroscopy and Rossiter-McLaughlin effect; 6. Secondary eclipses and phase variations; 7. Transit timing variations and orbital dynamics; 8. Brave new worlds: the future; Index.

Haswell, Carole A.

2010-07-01

22

Transit Tracks  

NSDL National Science Digital Library

In this space science activity, learners explore transits and the conditions when a transit may be seen. Learners use models to investigate how a planet's size and distance from its star affects the behavior of transits. Learners also use mathematics to interpret graphs of brightness vs. time to deduce information about planet-star systems. This lesson includes educator instructions, photocopy masters for Transit Light Curves, Option Math for Transit Tracks, Keplerâs 3rd Law graphs, cube root tables, an account of Jeremiah Horrocks' 1639 observation of the transit of Venus, and an answer key for the Transit Tracks Light Curves.

Science, Lawrence H.

2008-01-01

23

Work Transitions  

ERIC Educational Resources Information Center

Individuals make choices in, and adjust to, a world of work that is often a moving target. Because work is so central to human functioning, and transitions in and out of work can have major mental health repercussions, the authors argue that applied psychologists in health services need to understand those transitions. This article focuses on the…

Fouad, Nadya A.; Bynner, John

2008-01-01

24

Transition Checklist.  

ERIC Educational Resources Information Center

This transition checklist is intended to be a guide for North Dakota students with disabilities, teachers, parents, and agency personnel to help drive the transition process in an orderly and organized manner. The checklist provides suggestions and activities for grades 8-12 and students ages 14-21. The information is organized in sequence to…

North Dakota State Dept. of Public Instruction, Bismarck. Div. of Special Education.

25

Transitional Care  

ERIC Educational Resources Information Center

Transitional care encompasses a broad range of services and environments designed to promote the safe and timely passage of patients between levels of health care and across care settings. High-quality transitional care is especially important for older adults with multiple chronic conditions and complex therapeutic regimens, as well as for their…

Naylor, Mary; Keating, Stacen A.

2008-01-01

26

Transition metals  

PubMed Central

Transition metals such as Iron (Fe) and Copper (Cu) are essential for plant cell development. At the same time, due their capability to generate hydroxyl radicals they can be potentially toxic to plant metabolism. Recent works on hydroxyl-radical activation of ion transporters suggest that hydroxyl radicals generated by transition metals could play an important role in plant growth and adaptation to imbalanced environments. In this mini-review, the relation between transition metals uptake and utilization and oxidative stress-activated ion transport in plant cells is analyzed, and a new model depicting both apoplastic and cytosolic mode of ROS signaling to plasma membrane transporters is suggested. PMID:23333964

Rodrigo-Moreno, Ana; Poschenrieder, Charlotte; Shabala, Sergey

2013-01-01

27

Transit Math  

NSDL National Science Digital Library

This is a collection of mathematical problems about transits in the solar system. Learners can work problems created to be authentic glimpses of modern science and engineering issues, often involving actual research data.

28

Transition Resources  

NSDL National Science Digital Library

This is a site for teachers that work with students with disabilities at the secondary level. This site is broken down into categories to help you with the transition aspect of the IEP. The categories are as follows: Employment/Training, For Students - Career Exploration and Profiles, Independent Living, Learning Styles & Trainings, Level 1 Assessments, Self-Determination, and Transition Resources. All of the resources included in this site are free! TRANSITION RESOURCES: 1.) Adult Career and Continuing Education Services (ACCES-VR) This website takes you directly to the ACCES-VR website, where you can find information about vocational rehabilitation and the referral process. 2,) Guide to Quality Individualized Education Program (IEP) Development and Implementation Created by the New York State Special Education Department to help answer questions regarding the New IEP. Great resource! Gives examples!! 3.) Indicator 13 Checklist Use this ...

Transition

2011-11-23

29

Venus Transit  

NSDL National Science Digital Library

This is an activity about the Venus Transit and how it helped astronomers determine the scale of the solar system. Learners will use measurement, ratios, and graphing to construct a model of the solar system and determine the relationship of each planet to the Sun. They will explore the scales needed to represent the size of the planets and the distances to the Sun. This activity corresponds to the NASA CONNECT video, titled Venus Transit, and has supplemental questions to support the video viewing.

30

Metric transition  

NASA Technical Reports Server (NTRS)

This report describes NASA's metric transition in terms of seven major program elements. Six are technical areas involving research, technology development, and operations; they are managed by specific Program Offices at NASA Headquarters. The final program element, Institutional Management, covers both NASA-wide functional management under control of NASA Headquarters and metric capability development at the individual NASA Field Installations. This area addresses issues common to all NASA program elements, including: Federal, state, and local coordination; standards; private industry initiatives; public-awareness initiatives; and employee training. The concluding section identifies current barriers and impediments to metric transition; NASA has no specific recommendations for consideration by the Congress.

1992-01-01

31

L{beta}1 and L{beta}2 Satellites in the X-ray Emission Spectra  

SciTech Connect

The X-ray satellites L{beta}{sub 1}{sup I}, L{beta}{sub 1}{sup II}, L{beta}{sub 1}{sup III}, L{beta}{sub 1}{sup IV}, L{beta}{sub 2}{sup I}, L{beta}{sub 2}{sup (b)}, L{beta}{sub 2}{sup II} and L{beta}{sub 2}{sup (c)} observed in the L-emission spectra in elements with Z = 26 to 92, have been calculated. The energies of various transitions have been calculated by available Hartree-Fock-Slater (HFS) data using the semi-empirical Auger transition energies in the doubly ionized atoms and their relative intensities have been estimated by considering cross - sections of singly ionized 2x-1 (x {identical_to} s, p) states and then of subsequent Coster-Kronig and shake off processes. The calculated spectra have been compared with the measured satellite energies in the L emission spectra. Their intense peaks have been identified as the observed satellite lines. The one to one correspondence between the peaks in calculated spectra and the satellites in measured spectra has been established on the basis of the agreement between the separations in the peak energies and those in the measured satellite energies. Group of transitions under the transition schemes L2Mx-MxM4,5 and L3Mx-MxN4,5 (x {identical_to} 1-5), which give rise to these satellites have been identified. It is observed that the satellite L{beta}{sub 2}{sup (b)} in all these spectra can be assigned to the superposition of 3F4-3G5 and 3F4-3D3 transitions and that this must be most intense one out of all these satellites, contributing in order of decreasing intensity. Each of the remaining satellites is found to have different origin in different elements. The possible contributions of the suitable transitions to all these lines have also been discussed.

Poonia, Surendra [Division of Natural Resources and Environment, Central Arid Zone Research Institute, Jodhpur - 342 003, Rajasthan (India)

2005-10-26

32

ETD - Exoplanet Transit Database  

NASA Astrophysics Data System (ADS)

Introduction of Exoplanet Transit Database (ETD), an internet portal, which offers all necessary informations for exoplanet transit observation. Scheduling, list of previously obtained data and on-line algorithm for photometric data processing, which determines the mid-transit time, duration and depth of a transit The Exoplanet Transit Database can be found at http://var.astro.cz/etd.

Brát, L.; Poddaný, S.; Pejcha, O.; Zejda, M.

2010-12-01

33

What remains to be done to allow quantitative X-ray microanalysis performed with EDS to become a true characterization technique?  

PubMed

This article reviews different methods used to perform quantitative X-ray microanalysis in the electron microscope and also demonstrates the urgency of measuring the fundamental parameters of X-ray generation for the development of accurate standardless quantitative methods. Using ratios of characteristic lines acquired on the same X-ray spectrum, it is shown that the Cliff and Lorimer K A-B factor can be used in a general correction method that is appropriate for all types of specimens and electron microscopes, providing that appropriate corrections are made for X-ray absorption, fluorescence, and indirect generation. Since the fundamental parameters appear in the K A-B factor, only the ratio of the ionization cross sections needs to be known, not their absolute values. In this regard, the measurement of ratios of the K A-B factor (or intensities at different beam energies of the same material with no change of beam spreading in the material) permits the validation for the best models to compute the ratio of ionization cross sections. It is shown, using this method, that the nonrelativistic Bethe equation, to compute ionization cross section, is very close to the equation of E. Casnati et al. (J Phys B 15, 155-167, 1982) and also to the equations proposed by D. Bote and F. Salvat (Phys Rev A 77, 042701, 2008) for the computation of the ratio of ionization cross sections. The method is extended to show that it could be used to determine the values of the Coster-Kronig transitions factors, an important fundamental parameter for the generation of L and M lines that is mostly known with poor accuracy. The detector efficiency can be measured with specimens where their intensities were measured with an energy dispersive spectrometer detector, the efficiency of which has been measured in an X-ray synchrotron (M. Alvisi et al., Microsc Microanal 12, 406-415, 2006). The spatial resolution should always be computed when performing quantitative X-ray microanalysis and the equations of R. Gauvin (Microsc Microanal 13(5), 354-357, 2007) for bulk materials and the one presented in this article for thin films should be used. The effects of X-rays generated by fast secondary electrons and by Auger electrons are reviewed, and their effect can be detrimental for the spatial resolution of materials involving low-energy X-ray lines, in certain specific conditions. Finally, quantitative X-ray microanalysis of heterogeneous materials is briefly reviewed. PMID:23095445

Gauvin, Raynald

2012-10-01

34

Utah Transit Authority Creating a Model Transit  

E-print Network

Utah Transit Authority Creating a Model Transit Safety Organization Global Level Crossing Safety Service Area UTAH #12;UTA Rail Openings 140 Miles in 14 years · TRAX (Light Rail) North South 15 mi Dec

Illinois at Urbana-Champaign, University of

35

Transition to Adulthood  

MedlinePLUS

... Back to top Students at the Heart of Planning Their Transition For the students themselves, transition activities ... help students become involved in their own transition planning…and many good reasons to do so. To ...

36

Transitions: A Personal Perspective.  

ERIC Educational Resources Information Center

Distinguishes between unchosen transitions (children maturing and leaving, parents aging, companies downsizing) and chosen ones (moving, divorce, marriage, career changes). Describes the steps one goes through: uneasiness, renewed energy, complaining, exploration, partial transition, and the completed transition. (JOW)

Wood, Ann Stace

1995-01-01

37

Transitions into Adolescence  

MedlinePLUS

Transitions Into Adolescence Overview Transitioning from childhood into young adulthood is a delicate time for most teens but for teens with ... life skills. Throughout the transition from childhood to adolescence, much depends on the early efforts and coordination ...

38

Transit Rider Information King County Metro Transit  

E-print Network

Transit Rider Information King County Metro Transit Rider Information (206) 553-3000 http://www.kingcounty.gov/metro and after a storm make it easier and safer to clear streets. · Use the bus. SDOT works closely with Metro closely with King County Metro Transit, the Seattle School District, local universities, hospitals

Queitsch, Christine

39

MassTransitMag  

NSDL National Science Digital Library

The MassTransit website is dedicated to "Better Transit Through Better Management", and their offerings include industry news, email newsletters, video profiles, and opinion pieces about the world of mass transit. The site is mostly dedicated to providing information about mass transit systems in the United States, though visitors will note that there is some coverage of international transit systems as well. The "Current Issue" section includes full-text version of most of the articles found in the print issue, along with an archive dating back to 2005. For more up-to-the minute coverage of transit affairs, the "Daily News" area digests ongoing legislation, transit improvements, and long-range plan updates from a variety of sources. The "MassTransit Interactive" area allows users to read and comment on editor's comments on the news affecting the transit world, including issues such as federal funding mechanisms, light-rail initiatives, and union contracts.

40

Gas turbine combustor transition  

DOEpatents

A method of converting a steam cooled transition to an air cooled transition in a gas turbine having a compressor in fluid communication with a combustor, a turbine section in fluid communication with the combustor, the transition disposed in a combustor shell and having a cooling circuit connecting a steam outlet and a steam inlet and wherein hot gas flows from the combustor through the transition and to the turbine section, includes forming an air outlet in the transition in fluid communication with the cooling circuit and providing for an air inlet in the transition in fluid communication with the cooling circuit.

Coslow, Billy Joe (Winter Park, FL); Whidden, Graydon Lane (Great Blue, CT)

1999-01-01

41

Gas turbine combustor transition  

DOEpatents

A method is described for converting a steam cooled transition to an air cooled transition in a gas turbine having a compressor in fluid communication with a combustor, a turbine section in fluid communication with the combustor, the transition disposed in a combustor shell and having a cooling circuit connecting a steam outlet and a steam inlet and wherein hot gas flows from the combustor through the transition and to the turbine section, includes forming an air outlet in the transition in fluid communication with the cooling circuit and providing for an air inlet in the transition in fluid communication with the cooling circuit. 7 figs.

Coslow, B.J.; Whidden, G.L.

1999-05-25

42

Relativistic calculations of M-shell photoionization and X-ray production cross-sections for Hg at 5.96 keV excitation energy  

NASA Astrophysics Data System (ADS)

In this work we calculate photoionization and X-ray production cross-sections (XPCS) of M-shell vacancies in Hg at an incident photon energy of 5.96 keV (low energy X-rays of 55Fe radioactive source) using the Dirac-Fock method. Calculations are performed in single configuration approach with the Breit interaction and some vacuum polarization corrections included in the self-consistent method. Higher-order retardation corrections, self-energy and other vacuum polarization effects were also included as perturbations. Fluorescence and Coster-Kronig yields necessary to derive XPCS were obtained in a previous work using the exact same approach.

Sampaio, J. M.; Madeira, T. I.; Parente, F.; Indelicato, P.; Santos, J. P.; Marques, J. P.

2015-02-01

43

Single, double, and triple Auger decay of the Xe 4p core-hole states  

SciTech Connect

Auger decay of Xe{sup +} states arising from 4p ionization has been studied with a very efficient multielectron coincidence method. Coster-Kronig decay from Xe{sup +} 4p{sup -1} and the subsequent decay into Xe{sup 3+} states with three valence holes are identified. Formation of Xe{sup 4+} is also observed as quadruple coincidences between a 4p photoelectron and three Auger electrons. The relative probabilities of individual multi-ionization processes are determined from the coincidence yields.

Hikosaka, Y.; Kaneyasu, T.; Shigemasa, E. [UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585 (Japan); Lablanquie, P.; Penent, F. [LCP-MR, Universite Pierre et Marie Curie-Paris 6 and CNRS (UMR 7614), 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05 (France); Eland, J. H. D. [Physical and Theoretical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ (United Kingdom); Aoto, T.; Ito, K. [Photon Factory, Institute of Materials Structure Science, Oho, Tsukuba 305-0801 (Japan)

2007-09-15

44

Widths and fluorescence yields of atomic L-shell vacancy states  

Microsoft Academic Search

A comprehensive set of theoretical L-shell Auger and total widths, and Coster-Kronig and fluorescence yields is presented for atomic numbers 18<=Z<=100. These quantities are based on ab initio relativistic calculations. Agreement with experimental values is fair for omega1 and generally good for omega2, omega3 (Z>=54), f23 (Z>=60), Gamma(L2), Gamma(L3), and for Gamma(L1) in the range 49<=Z<=75. Discrepancies in Gamma(L1) for

Mau Hsiung Chen; Bernd Crasemann; Hans Mark

1981-01-01

45

Transitional Tetrapod Fossil  

NSDL National Science Digital Library

In this video segment from NOVA: Judgment Day: Intelligent Design on Trial, learn about the discovery of a well-preserved transitional fossil and how such transitional fossils support the theory of evolution.

Foundation, Wgbh E.

2007-11-01

46

Transition in Turbines  

NASA Technical Reports Server (NTRS)

The concept of a large disturbance bypass mechanism for the initiation of transition is reviewed and studied. This mechanism, or some manifestation thereof, is suspected to be at work in the boundary layers present in a turbine flow passage. Discussion is presented on four relevant subtopics: (1) the effect of upstream disturbances and wakes on transition; (2) transition prediction models, code development, and verification; (3) transition and turbulence measurement techniques; and (4) the hydrodynamic condition of low Reynolds number boundary layers.

1985-01-01

47

Light Rail Transit Strengthening  

E-print Network

Light Rail Transit Improving mobility Easing congestion Strengthening our communities Central Corridor Communicating to the Public During Major Construction May 25, 2011 #12;2 Light Rail Transit;Light Rail Transit Central Corridor Route and Stations 3 · 18 new stations · 9.8 miles of new double

Minnesota, University of

48

Gifts from Exoplanetary Transits  

E-print Network

The discovery of transiting extrasolar planets has enabled us a number of interesting stduies. Transit photometry reveals the radius and the orbital inclination of transiting planets, and thereby we can learn the true mass and the density of respective planets by the combined information of radial velocity measurements. In addition, follow-up observations of transiting planets such as secondary eclipse, transit timing variations, transmission spectroscopy, and the Rossiter-McLaughlin effect provide us information of their dayside temperature, unseen bodies in systems, planetary atmospheres, and obliquity of planetary orbits. Such observational information, which will provide us a greater understanding of extrasolar planets, is available only for transiting planets. Here I briefly summarize what we can learn from transiting planets and introduce previous studies.

Narita, Norio

2009-01-01

49

Reconstructing Regulatory Network Transitions  

PubMed Central

Cellular responses often involve a transition of cells from one state to another. A transition from a stem cell to differentiated cell state, for example, may occur in response to gene expression changes induced by a transcription factor, or signaling cascades triggered by a hormone or pathogen. Regulatory networks are thought to control such cellular transitions. Thus, many researchers are interested in reconstructing regulatory networks, not only to gain a deeper understanding of cellular transitions, but also with the aim of using networks to predict and potentially manipulate cellular transitions and outcomes. In this review, we highlight approaches to the reconstruction of regulatory networks underlying cellular transitions, with special attention to transcriptional regulatory networks. We describe recent regulatory network reconstructions in a variety of organisms and discuss the success they share in identifying new regulatory components as well as shared relationships and phenotypic outcomes. PMID:21632251

Petricka, Jalean J.; Benfey, Philip N.

2011-01-01

50

Metal-insulator transitions  

Microsoft Academic Search

Metal-insulator transitions are accompanied by huge resistivity changes, even over tens of orders of magnitude, and are widely observed in condensed-matter systems. This article presents the observations and current understanding of the metal-insulator transition with a pedagogical introduction to the subject. Especially important are the transitions driven by correlation effects associated with the electron-electron interaction. The insulating phase caused by

Masatoshi Imada; Atsushi Fujimori; Yoshinori Tokura

1998-01-01

51

Polyphosphazenes: Thermomechanical transitions  

Microsoft Academic Search

The dynamic mechanical behavior (approximately 1 Hz) of four linear phosphazene homopolymers, two copolymers and two physical blends with overall composition approximating the copolymers, was examined between -180 and 250 C in an inert atmosphere. Crystal\\/melt, crystal\\/crystal, glass and glassy-state transitions were documented and the effect of high temperature on the transitions was investigated. A glassy-state transition in each fluoroalkoxypolyphosphazene

T. M. Connelly; J. K. Gillham

1975-01-01

52

Bacterial Transition Metal Homeostasis  

Microsoft Academic Search

Since details on metal cation transport proteins and on the allocation mechanisms for transition metals\\u000a are provided elsewhere in this book, I will present aspects of transition metal homeostasis in a hopefully\\u000a novel overview. We will start with a microbial look at the transition metal Periodic Table, cation speciation,\\u000a and availability in the environment. This information provides rules that might

Dietrich H. Nies

53

Moons over Jupiter: transits and shadow transits  

NASA Astrophysics Data System (ADS)

There is no more beautiful illustration of orbital motions than the movements of Jupiter's satellites. Every six years, their movements are most strikingly displayed, when the jovian system is presented edge-on to Earth. This means that there is a higher frequency of multiple transits over the face of the planet, as all the moons transit across the equatorial zone, whereas in other years Ganymede and Callisto transit near the poles or not at all. Also, for a few months, the satellites pass in front of each other, displaying mutual eclipses and occultations. In 2002/2003 we have been able to observe a fine series of these multiple and mutual events. On the cover, and on these pages, are some of the highest-resolution images received.

Rogers, J. H.; et al.

2003-06-01

54

Transitive and Pseudo-Transitive Inferences  

ERIC Educational Resources Information Center

Given that A is longer than B, and that B is longer than C, even 5-year-old children can infer that A is longer than C. Theories of reasoning based on formal rules of inference invoke simple axioms ("meaning postulates") to capture such transitive inferences. An alternative theory proposes instead that reasoners construct mental models of the…

Goodwin, Geoffrey P.; Johnson-Laird, P. N.

2008-01-01

55

Atomic Dipole Transitions Applet  

NSDL National Science Digital Library

This simulation explores the transitions between quantum states in a hydrogen atom. The time-dependent wavefunction is displayed. An electric field resonant with the transition between states is applied and the changes in the wavefunction with time are tracked in a dipole approximation. Initial and final states can be selected by the user.

Falstad, Paul

2004-05-17

56

Transitions and Linkages.  

ERIC Educational Resources Information Center

If children are to benefit from a healthy, supportive early childhood experience, it is important to strengthen transitions between early childhood experiences in educational and care settings and the more formal educational system. This issue of Coordinator's Notebook focuses on strengthening linkages and transitions between home, preschool, and…

Ilfeld, Ellen M., Ed.; Hanssen, Elizabeth, Ed.

1997-01-01

57

Modeling the transition region  

NASA Technical Reports Server (NTRS)

The calculation of engineering flows undergoing laminar-turbulent transition presents special problems. Mean-flow quantities obey neither the fully laminar nor the fully turbulent correlations. In addition, local maxima in skin friction, wall temperature, and heat transfer often occur near the end of the transition region. Traditionally, modeling this region has been important for the design of turbine blades, where the transition region is long in relation to the chord length of the blade. More recently, the need for better transition-region models has been recognized by designers of hypersonic vehicles where the high Mach number, the low Reynolds number, and the low-disturbance flight environment emphasize the importance of the transition region. Needless to say, a model that might work well for the transitional flows typically found in gas turbines will not necessarily work well for the external surface of a hypersonic vehicle. In Section 2 of this report, some of the important flow features that control the transition region will be discussed. In Section 3, different approaches to the modeling problem will be summarized and cataloged. Fully turbulent flow models will be discussed in detail in Section 4; models specifically designed for transitional flow, in Section 5; and the evaluation of models, in Section 6.

Singer, Bart A.

1994-01-01

58

TTVFast: Transit timing inversion  

NASA Astrophysics Data System (ADS)

TTVFast efficiently calculates transit times for n-planet systems and the corresponding radial velocities. The code uses a symplectic integrator with a Keplerian interpolator for the calculation of transit times (Nesvorny et al. 2013); it is available in both C and Fortran.

Deck, Katherine; Agol, Eric; Holman, Matt; Nesvorny, David

2014-04-01

59

The earliest phase transition?  

NASA Astrophysics Data System (ADS)

The question of a phase transition in exiting the Planck epoch of the early universe is addressed. An order parameter is proposed to help decide the issue, and estimates are made concerning its behavior. Our analysis is suggestive that a phase transition occurred.

Samuel, Stuart

2000-10-01

60

Good Transitions = Great Starts!  

ERIC Educational Resources Information Center

The smooth transition of outgoing and incoming board members and officers is of vital importance and can determine the PTA's success for years to come. The transition process is the responsibility of both incoming and outgoing officers and board members. It gives closure to those leaving their positions and allows those coming in to be properly…

Our Children: The National PTA Magazine, 2012

2012-01-01

61

Transforming Cities With Transit  

NSDL National Science Digital Library

How are cities transformed by the creation of new transit lines? How can existing transit lines be modified to create new land use opportunities for housing and commercial properties? These subjects are covered by a 172-page conference edition of a forthcoming paper from the World Bank. The paper was authored by Hiroaki Suzuki, Robert Cervero, and Kanako Iuchi. Visitors will note that the work focuses on "identifying barriers to and opportunities for effective coordination of transport infrastructure and urban development." The work takes on a number of global best practices of transit-oriented metropolises that have direct relevance to cities in developing countries and offers both analysis and suggestions for future projects. Sections here include "Lessons from Sustainable Transit-Oriented Cities," "Integrating Transit and Urban Development in Cities in the Developing World," and "Toward Sustainable Urban Futures."

Cervero, Robert.; Iuchi, Kanako; Suzuki, Hiroaki

62

Accessibility-based transit planning  

E-print Network

A method for evaluating transit planning proposals using accessibility metrics is advanced in this research. A transit-accessibility model is developed intended for use by in-house transit agency planning staff as a ...

Busby, Jeffrey R

2004-01-01

63

Alternative fuel transit buses  

SciTech Connect

The National Renewable Energy Laboratory (NREL) is a U.S. Department of Energy (DOE) national laboratory; this project was funded by DOE. One of NREL`s missions is to objectively evaluate the performance, emissions, and operating costs of alternative fuel vehicles so fleet managers can make informed decisions when purchasing them. Alternative fuels have made greater inroads into the transit bus market than into any other. Each year, the American Public Transit Association (APTA) surveys its members on their inventory and buying plans. The latest APTA data show that about 4% of the 50,000 transit buses in its survey run on an alternative fuel. Furthermore, 1 in 5 of the new transit buses that members have on order are alternative fuel buses. This program was designed to comprehensively and objectively evaluate the alternative fuels in use in the industry.

Motta, R.; Norton, P.; Kelly, K. [and others

1996-10-01

64

Oligocyclopentadienyl transition metal complexes  

SciTech Connect

Synthesis, characterization, and reactivity studies of oligocyclopentadienyl transition metal complexes, namely those of fulvalene, tercyclopentadienyl, quatercyclopentadienyl, and pentacyclopentadienyl(cyclopentadienyl) are the subject of this account. Thermal-, photo-, and redox chemistries of homo- and heteropolynuclear complexes are described.

de Azevedo, Cristina G.; Vollhardt, K. Peter C.

2002-01-18

65

Economic Growth in Transition  

Microsoft Academic Search

This paper sets the contributions to this issue in the context of a large and rapidly growing literature. It argues, on theoretical and empirical grounds, that future research should focus on transitional growth dynamics. Copyright Blackwell Publishing Ltd, 2003.

Donald A. R. George; Les Oxley; Ken Carlaw

2003-01-01

66

MATHEMATICS: RETHINKING THE TRANSITION  

E-print Network

SENIOR SECONDARY MATHEMATICS: RETHINKING THE TRANSITION BILL BARTON THE UNIVERSITY OF AUCKLAND, NZ #12;THE ENVISIONING PROJECT · Mathematics education project of NZIMA (New Zealand Institute of Mathematics & Its Applications--the mathematics research funding body). · Brought together mathematics

Peters, Achim

67

Transit & Arterial Performance  

E-print Network

Transit & Arterial Performance Michael Wolfe & Mathew Berkow A Study of the Barbur Boulevard arterial performance in a corridor using both advance and system loop data · Ultimately, marry the two data

Bertini, Robert L.

68

Transit of Venus  

NSDL National Science Digital Library

The Transit of Venus is similar to a solar eclipse, where -- from the perspective on Earth -- Venus passes in front of the Sun. This event does not happen very often. In fact, no one alive today has experienced this phenomenon, which will take place on June 8 and will be visible for most of Europe, Asia, and Africa.First, the Armagh Planetarium created a great, expansive informational site all about the Transit of Venus (1). Users can find basic facts, observing information, histories of past transits, and much more. Next, the European Southern Observatory presents the VT-2004 project's aim to gain knowledge and encourage public interest in the event (2). Users can observe Venus's progression towards the transit with the daily images from April 17, 2004 to present news updates. Educators can discover transit-related activities and educational materials. The third site, created by NASA, discusses the details of the Sun-Earth Connection Education Forum and San Francisco's Exploratorium's live webcast of the Transit (3). The site supplies enjoyable, educational materials for students, educators, museums, scientists, and amateur astronomers. The next site, also created by NASA, provides an introduction to the Venus Transits that will take place June 2004 and 2012 (4). Visitors can find helpful figures and text about the geographic visibility of the events. The site offers an observer's handbook as well as a discussion about the predictions of the event. Next, Professor Backhaus presents a project where schools, amateur astronomers, and universities will collaborate to gather transit data and learn about observing (5). Users can discover the six parts of the project as well as learn how to participate in the worldwide endeavor. The sixth site also discusses a Venus Transit project (6). Endorsed by the Astronomical Association of Zurich, this project's goals are to process data collected by amateur astronomers by different observation methods, to act as a data exchange center, and to determine the astronomical unit. Next, the Exploratorium furnishes general information about the Transit, its history, how viewers observe it, what it looks like, and why it is an important event (7). Users can find out about the live webcast that will begin on June 7, 2004 from Athens, Greece. Educators can find student activities developed to integrate discussions into the classroom. Lastly, Willie Koorts, an employee at the South African Astronomical Observatory, recounts the observations of scientists in Africa of the last transit of Venus (8). The site contains many historical photographs along with informational diagrams and figures.

69

Entrepreneurship in transitional economy  

Microsoft Academic Search

This paper explores the relationship among socio-political culture and the economic environment. It places the entrepreneur\\u000a at the forefront of the Transitional Economy and identifies the entrepreneur as a catalyst for change and progress. Within\\u000a wider world changes, this discussion and interrogation of entrepreneurial development in the Transitional Economy provides\\u000a new knowledge from the perspective of both the authors and

Janusz K. Tanas; David B. Audretsch

70

Quarkonia and their transitions  

SciTech Connect

Valuable data on quarkonia (the bound states of a heavy quark Q=c,b and the corresponding antiquark) have recently been provided by a variety of sources, mainly e{sup +}e{sup -} collisions, but also hadronic interactions. This permits a thorough updating of the experimental and theoretical status of electromagnetic and strong transitions in quarkonia. The QQ transitions to other QQ states are discussed, with some reference to processes involving QQ annihilation.

Eichten, Estia; Godfrey, Stephen; Mahlke, Hanna; Rosner, Jonathan L. [Fermilab, P.O. Box 500, Batavia, Illinois 60510 (United States); Ottawa Carleton Institute for Physics, Department of Physics, Carleton University, 1125 Colonel By Drive, Ottawa, ON K1S 5B6 (Canada); Laboratory for Elementary-Particle Physics, Cornell University, Ithaca, New York 14853 (United States); Enrico Fermi Institute and Department of Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 (United States)

2008-07-15

71

Segmental colonic transit time  

Microsoft Academic Search

Mean segmental transit time of radiopaque markers through the right colon, left colon and rectosigmoid areas of adults and\\u000a children has been calculated from their distribution on consecutive plain films of the abdomen. Overall mean transit does\\u000a not differ significantly in the large bowel between adults and children. However, there are regional differences within the\\u000a colon in relation to age.

Pierre Arhan; Ghislain Devroede; Bertrand Jehannin; Michel Lanza; Claude Faverdin; Catherine Dornic; Bernard Persoz; Léon Tétreault; Bernard Perey; Denys Pellerin

1981-01-01

72

Clothoid spline transition spirals  

NASA Astrophysics Data System (ADS)

Highway and railway designers use clothoid splines (planar {G^2} curves consisting of straight line segments, circular arcs, and clothoid segments) as center lines in route location. This paper considers the problem of finding a clothoid spline transition spiral which joins two given points and matches given curvatures and unit tangents at the two points. Conditions are given for the existence and uniqueness of the clothoid spline transition spirals, and algorithms for finding them are outlined.

Meek, D. S.; Walton, D. J.

1992-07-01

73

Venus Transit 2004  

NASA Astrophysics Data System (ADS)

December 6th, 1882 was the last transit of the planet Venus across the disk of the sun. It was heralded as an event of immense interest and importance to the astronomical community as well as the public at large. There have been only six such occurrences since Galileo first trained his telescope on the heavens in 1609 and on Venus in 1610 where he concluded that Venus had phases like the moon and appeared to get larger and smaller over time. Many historians consider this the final nail in the coffin of the Ptolemaic, Earth centered solar system. In addition, each transit has provided unique opportunities for discovery such as measurement and refinement of the astronomical unit, calculation of longitudes on the earth, and detection of Venus' atmosphere. The NASA Sun Earth Connection Education Forum in partnership with the Solar System Exploration Forum, DPS, and a number of NASA space missions is developing plans for an international education program centered around the June 8, 2004 Venus transit. The transit will be visible in its entirety from Europe and partially from the East Coast of the United States. We will use a series of robotic observatories including the Telescopes In Education network distributed in latitude to provide observations of the transit that will allow middle and high school students to calculate the A.U. through application of parallax. We will also use Venus transit as a probe of episodes in American history (e.g. 1769: revolutionary era, 1882: post civil war era, and 2004: modern era). Museums and planetariums in the US and Europe will offer real time viewing of the transit and conduct educational programs through professional development seminars, public lectures, and planetarium shows. We are interested in soliciting advice from the research community to coordinate professional research interests with this program.

Mayo, L. A.; Odenwald, S. F.

2002-09-01

74

Certificate in Transit Management and  

E-print Network

Certificate in Transit Management and Operations UMass Transit, in partnership with the UMass Transportation Center and CTTransit, are pleased to offer "A Certificate in Transit Management and Operations" to students at the University of Massachusetts. "Within the next 5-10 years more than 50 percent of transit

Massachusetts at Amherst, University of

75

Certificate in Transit Management and  

E-print Network

Certificate in Transit Management and Operations UMass Transit, in partnership with the UMass Transportation Center and CTTransit, are pleased to offer "A Certificate in Transit Management and Operations" "Within the next 5-10 years more than 50 percent of transit industry workers are expected to retire

Massachusetts at Amherst, University of

76

The Concept of Transition System  

ERIC Educational Resources Information Center

The term "transition system" describes features of a country's institutional arrangements which shape young people's education-work transitions. It explains why national differences in transition processes and outcomes persist despite apparent pressures for convergence. This paper asks how the concept of transition system has been conceptualised…

Raffe, David

2008-01-01

77

Nonlinear effects of transition broadening  

Microsoft Academic Search

Nonlinear broadening of closely spaced transitions has been studied using micromagnetics simulations. Results show a large increase in the width of a transition due to the demagnetizing field effect of earlier transitions. Based on this observation, a simple recording channel model is developed to investigate the effects of nonlinear transition broadening on detection performance. This analysis shows that the conventional

Jaekyun Moon; Jian-Gang Zhu

1991-01-01

78

RTGs on Transit  

NASA Astrophysics Data System (ADS)

Transit, the US Navy's Navigation Satellite System was conceived at the Applied Physics Laboratory in 1957 by observing the Doppler shift while tracking Sputnik I. As spacecraft development proceeded there was concern about the ability of batteries to maintain the hermetic seal over a 5-year operational life requirement; therefore, alternate energy sources were investigated. The radioisotope thermoelectric generator (RTG) concept was pursued and resulted in the launch of SNAP 3s, providing partial power on both Transit 4A and 4B. SNAP 9s provided full power on three Transit 5BNs. All launches occurred in the early 1960s. When the U.S. conducted the high altitude nuclear test from Johnson Island, several spacecraft were lost due to artificial enhancement of charged particles in the Earth's magnetosphere resulting in rapid degradation of solar cell power production. This led to the decision to have both an RTG and Solar cell/battery design for Transit power systems; hence, a new RTG design, with a separable heat source and radiative coupling to the thermoelectric elements, was flown on TRIAD. This pioneering effort provided the impetus for future RTGs on interplanetary spacecraft. This paper describes the origin and purpose of the Transit program and provides details on the five satellites in that program that were powered by the first American RTGs used in space. The rationale and some of the challenges inherent in that use are also described.

Dassoulas, John; McNutt, Ralph L.

2007-01-01

79

1D Quantum Transitions Applet  

NSDL National Science Digital Library

This simulation explores the transitions between quantum states in a number of 1D systems. The time-dependent wavefunction is displayed. An electric field resonant with the transition between states is applied and the changes in the wavefunction with time are tracked. The dipole transition probability is displayed for different initial to final state transitions, and the user may select the transition they wish to observe.

Falstad, Paul

2004-05-17

80

Transitional lumbosacral osseous complex  

SciTech Connect

The weight of the head and trunk is transferred to the lower extremities through that segment of the spine articulating either directly or indirectly with the ilii. When a lumbosacral transitional vertebra is present the position of the weight-bearing platform usually changes. A bony entity is formed delineated superiorly by the top of the transitional vertebra and inferiorly by the lower level of the sacroiliac joints. This segment is designated as the transitional lumbosacral osseous complex. Measurements of its length in the three phylogenetic categories in man, including measurements of the articulating portion of the sacrum in the human mode, showed a range of 68 mm to 157 mm and variations from 2.0 to 3.7 in vertebral lengths.

Wigh, R.E.

1982-05-01

81

Transition and laminar instability  

NASA Technical Reports Server (NTRS)

The linear stability theory was applied to the problem of boundary layer transition in incompressible flow. The theory was put into a form suitable for three-dimensional boundary layers; both the temporal and spatial theories were examined; and a generalized Gaster relation for three-dimensional boundary layers was derived. Numerical examples include the stability characteristics of Falkner-Skan boundary layers, the accuracy of the two-dimensional Gaster relation for these boundary layers, and the magnitude and direction of the group velocity for oblique waves in the Blasius boundary layer. Available experiments which bear on the validity of stability theory and its relation to transition are reviewed and the stability theory is applied to transition prediction. The amplitude method is described in which the wide band disturbance amplitude in the boundary layer is estimated from stability theory and an interaction relation for the initial amplitude density of the most unstable frequency.

Mack, L. M.

1977-01-01

82

Venus Transit 2004  

NSDL National Science Digital Library

In just several weeks, Venus, the Earth's sister planet, will pass in front of the sun, affording astronomers and the general public the ability to take part in a extremely rare event. While persons in Europe, Africa, and Asia will have the best vantage point for this occurrence, those interested in the Venus transit will want to take a detailed look at this lovely website in order to find out more about the event. Launched by the European Southern Observatory and the European Association for Astronomy Education (in cooperation with three other organizations), the site contains ample information about the latest news from the project, detailed background material about this astronomical event, the network of institutions involved with the project, and information on how individuals may participate in the Venus Transit 2004 project. One of the most helpful areas contains animations of the Venus transit from different perspectives.

83

Solitosynthesis induced phase transitions  

NASA Astrophysics Data System (ADS)

We consider a phase transition induced by the growth of Q-balls in a false vacuum. Such a transition could occur in the early universe in the case of broken supersymmetry with a metastable false vacuum. Small Q-balls with a negative potential energy can grow in a false vacuum by accretion of global charge until they reach critical size, expand, and cause a phase transition. We consider the growth of Q-balls from small to large, using the Bethe-Salpeter equation to describe small charge solitons and connecting to the growth of larger solitons for which the semiclassical approximation is reliable. We thus test the scenario in a simplified example inspired by supersymmetric extensions of the standard model.

Pearce, Lauren

2012-06-01

84

Sudden gravitational transition  

SciTech Connect

We investigate the properties of a cosmological scenario which undergoes a gravitational phase transition at late times. In this scenario, the Universe evolves according to general relativity in the standard, hot big bang picture until a redshift z < or approx. 1. Nonperturbative phenomena associated with a minimally-coupled scalar field catalyzes a transition, whereby an order parameter consisting of curvature quantities such as R{sup 2}, R{sub ab}R{sup ab}, R{sub abcd}R{sup abcd} acquires a constant expectation value. The ensuing cosmic acceleration appears driven by a dark-energy component with an equation-of-state w<-1. We evaluate the constraints from type 1a supernovae, the cosmic microwave background, and other cosmological observations. We find that a range of models making a sharp transition to cosmic acceleration are consistent with observations.

Caldwell, Robert R. [Department of Physics and Astronomy, Dartmouth College, 6127 Wilder Laboratory, Hanover, New Hampshire 03755 (United States); Komp, William [Physics Department, University of Louisville, 102 Natural Sciences, Louisville, Kentucky 40292 (United States); Parker, Leonard [Physics Department, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, Wisconsin 53201 (United States); Vanzella, Daniel A. T. [Instituto de Fisica de Sao Carlos, Universidade de Sao Paulo (IFSC-USP), Av. Trabalhador Sao-carlense, 400 Cx. Postal 369 - CEP 13560-970, Sao Carlos, Sao Paulo (Brazil)

2006-01-15

85

Transit of Mercury  

NSDL National Science Digital Library

It isn't every day that one gets to view a transit of Mercury. In fact, it's an event that only occurs approximately twelve times a century. For those of you who missed this event on November 8th, the researchers and scientists at the Exploratorium in San Francisco have created this program that contains the complete event and offer it to visitors to this lovely website. The transit was recorded from Kitt Peak in Arizona, and visitors to the site can watch a brief introduction to the program, and then watch various images from the webcast, complete with audio commentary at the beginning of each hour of coverage.

2006-01-01

86

Viscosity near phase transitions  

E-print Network

Probably the most enticing observation in theoretical physics during the last decade was the discovery of the great amount of consequences obtained from the AdS/CFT conjecture put forward by Maldacena. In this work we review how this correspondence can be used to address hydrodynamic properties such as the viscosity of some strongly interacting systems. We also employ the Boltzmann equation for those systems closer to low-energy QCD, and argue that this kind of transport coefficients can be related to phase transitions, in particular the QGP/hadronic phase transition studied in heavy ion collisions.

Antonio Dobado; Felipe J. Llanes-Estrada; Juan M. Torres-Rincon

2010-09-30

87

The Anderson Transition  

Microsoft Academic Search

An outline is given of the electrical properties expected in a disordered solid or fluid which shows a metal-insulator transition of Anderson type. This is one in which the Fermi energy of the electrons passes through a mobility edge separating extended states from states localized by disorder, as the composition or some other parameter is changed. Some of the experimental

Nevill Mott; M. Pepper; S. Pollitt; R. H. Wallis; C. J. Adkins

1975-01-01

88

Transition at hypersonic speeds  

NASA Technical Reports Server (NTRS)

Certain conjectures on the physics of instabilities in high-speed flows are discussed and the state of knowledge of hypersonic transition summarized. The case is made for an unpressured systematic research program in this area consisting of controlled microscopic experiments, theory, and numerical simulations.

Morkovin, Mark V.

1987-01-01

89

Efficient Transitive Closure Algorithms  

Microsoft Academic Search

We have developed some efficient algorithms for computing the transitive closure of a directed graph. This paper presents the algorithms for the problem of reachability. The algorithms, however, can be adapted to deal with path computations and a signitkantJy broader class of queries based on onesided recursions. We analyze these algorithms and compare them to algorithms in the literature. The

Yannis E. Ioannidis; Raghu Ramakrishnan

1988-01-01

90

Tips for Transition  

ERIC Educational Resources Information Center

The Individuals With Disabilities Education Improvement Act of 2004 (IDEA) states that transition planning should begin at the earliest age appropriate and no later than age 16. IDEA requires schools to make collaborative efforts to provide students access to an array of postschool activities including integrated employment, postsecondary…

Kellems, Ryan O.; Morningstar, Mary E.

2010-01-01

91

Learning for Life Transitions  

ERIC Educational Resources Information Center

Many adults return to formal learning situations to pursue lifelong learning goals because their lives are in transition from dealing with real-life problems such as divorce and re-marriage. The purpose of this study was to describe what couples learned that contributed to the success of their subsequent marriages and how they learned it. The…

Varmecky, Jane Hyde

2012-01-01

92

Transition Fault Simulation  

Microsoft Academic Search

Delay fault testing is becoming more important as VLSI chips become more complex. Components that are fragments of functions, such as those in gate-array designs, need a general model of a delay fault and a feasible method of generating test patterns and simulating the fault. The authors present such a model, called a transition fault, which when used with parallel-pattern,

John Waicukauski; Eric Lindbloom; Barry Rosen; Vijay Iyengar

1987-01-01

93

China's continuing urban transition  

Microsoft Academic Search

Urban growth in China has proceeded in step with the growth and transition of the socialist economy. Year 2000 Census data indicate an urban population of 456 million; this is 36% of the total population and is increasing much more rapidly than the overall population. Several factors drive this rapid urbanization and growth of cities and towns: continuing, although diminishing,

Clifton W Pannell

2002-01-01

94

Venus Transit 2004  

Microsoft Academic Search

December 6th, 1882 was the last transit of the planet Venus across the disk of the sun. It was heralded as an event of immense interest and importance to the astronomical community as well as the public at large. There have been only six such occurrences since Galileo first trained his telescope on the heavens in 1609 and on Venus

L. A. Mayo; S. F. Odenwald

2002-01-01

95

Boundary layer transition  

Microsoft Academic Search

The boundary layer stability, its active control by sound and surface heating and the effect of curvature are studied numerically and experimentally for subsonic flow. In addition, the experimental and flight test data are correlated using the stability theory for supersonic Mach numbers. Active transition fixing and feedback control of boundary layer by sound interactions are experimentally investigated at low

L. Maestrello; A. Bayliss; S. M. Mangalam; M. R. Malik

1986-01-01

96

Mott Metal Insulator Transitions  

E-print Network

Physics Letters 95, no. 4 (2009) 14 #12;Mott Insulators: Actuators Bimorph Actuators Thermal Sensing LiuMott Metal Insulator Transitions Satej Soman, Robert Tang-Kong March 21, Physics 141A 1 #12;Definitions: What is a Mott Insulator? Metal that stops conducting at low temperature or high pressure

Budker, Dmitry

97

String mediated phase transitions  

NASA Technical Reports Server (NTRS)

It is demonstrated from first principles how the existence of string-like structures can cause a system to undergo a phase transition. In particular, the role of topologically stable cosmic string in the restoration of spontaneously broken symmetries is emphasized. How the thermodynamic properties of strings alter when stiffness and nearest neighbor string-string interactions are included is discussed.

Copeland, ED; Haws, D.; Rivers, R.; Holbraad, S.

1988-01-01

98

A Survey Transition Course  

ERIC Educational Resources Information Center

Successful outcomes for a "Transition Course in Mathematics" have resulted from two unique design features. The first is to run the course as a "survey course" in mathematics, introducing sophomore-level students to a broad set of mathematical fields. In this single mathematics course, undergraduates benefit from an introduction of proof…

Johnston, William; McAllister, Alex M.

2012-01-01

99

Singing Smoothes Classroom Transitions  

ERIC Educational Resources Information Center

Just as humming a merry tune helped Snow White and her furry animal friends to quickly clean a filthy cottage in the movie "Snow White and the Seven Dwarfs" (Disney & Cottrell, 1937), singing can be an effective way to help keep young children fully engaged during classroom transitions. The purposes of this article are to: (1) consider why…

Mathews, Sarah E.

2012-01-01

100

Transition Resource Guide.  

ERIC Educational Resources Information Center

Designed for parents and professionals facing development of transition programs in their own communities, this guide offers in Section 1 an overview of noncollegiate educational options after high school for students with disabilities who need additional time and training to prepare for adulthood. It covers employment, postsecondary education and…

Spiers, Elizabeth, Comp.; Samberg, Laura, Ed.

101

Families in Transition.  

ERIC Educational Resources Information Center

This issue of "Emphasis" deals with families in transition, providing some model programs for the new family and some historical perspectives on how families have developed over time. Articles include: (1) "Nostalgia on the Right" (Nancy Theriot); (2) "Heart to Heart" (Nancy Harrington-MacLennan); (3) "The Media Get the Message" (Janet Alyn); (4)…

Britton, Patti O., Ed.; McGee, Michael, Ed.

1987-01-01

102

Transitions to School.  

ERIC Educational Resources Information Center

There is growing consensus among early childhood professionals about the importance of early childhood transition services (activities designed to ensure continuity for young children across different environments, including homes, child care settings, preschools, and schools). Providing such services requires collaboration and linkages among…

Stief, Elizabeth

103

Variational transition state theory  

SciTech Connect

This research program involves the development of variational transition state theory (VTST) and semiclassical tunneling methods for the calculation of gas-phase reaction rates and selected applications. The applications are selected for their fundamental interest and/or their relevance to combustion.

Truhlar, D.G. [Univ. of Minnesota, Minneapolis (United States)

1993-12-01

104

Is Mass Transit Possible?  

ERIC Educational Resources Information Center

Mass transit is possible in the United States, but only if the form it takes offers americans the quality of ride--cheap, private and rapid--they now have in the automobile. If these criteria are not achieved, Americans will continue to drive. (BT)

Environmental Science and Technology, 1975

1975-01-01

105

The Czech economic transition  

Microsoft Academic Search

AbstractThe processes that will drive the next stage of the Czech transition are likely to be similar to those promoting real convergence in the countries of the EU periphery. We draw on previous modeling research on these latter economies to construct and calibrate a small macrosectoral model of the Czech Republic. Model simulations explore some key policy issues facing CEE-country

Frank Barry; John Bradley; Michal Kejak; David Vavra

2003-01-01

106

AGU Leadership Transition Begins  

NASA Astrophysics Data System (ADS)

The election is over, and now we begin AGU's leadership transition! Newly elected leaders will take office on 1 January 2015 and about half of the current Board and Council members will rotate off. In addition, new volunteers will join AGU committees and task forces (http://sites.agu.org/leadership/committees/).

McPhaden, Mike

2014-10-01

107

Structural Balance and Transitivity  

E-print Network

Structural Balance and Transitivity Social Network Analysis, Chapter 6 Wasserman and Faust #12;Balance Theory Concerned with how an individual's attitudes or opinions coincide with those of others in a network balance vs dissonance if two actors that are "friends" have the same "attitude" toward a third

Liu, Huan

108

Entrepreneurship and Economic Transition  

Microsoft Academic Search

Identification of the entrepreneur's economic function has engaged economists for more than 200 years. In this paper we address the issue of entrepreneurship in two distinct ways: a) as it has historically developed within the field of economics and b) as it develops in the transitional context. In contrast to advanced western economies, productive entrepreneurship cannot be taken for granted

Ruta Aidis

2003-01-01

109

Transit of Extrasolar Planets  

NASA Technical Reports Server (NTRS)

During the past five years we have pursued the detection of extrasolar planets by the photometric transit method, i.e. the detection of a planet by watching for a drop in the brightness of the light as it crosses in front of a star. The planetary orbit must cross the line-of-sight and so most systems will not be lined up for such a transit to ever occur. However, we have looked at eclipsing binary systems which are already edge-on. Such systems must be very small in size as this makes the differential light change due to a transit much greater for a given planet size (the brightness difference will be proportional to the area of the transiting planet to the disc area of the star). Also, the planet forming region should be closer to the star as small stars are generally less luminous (that is, if the same thermal regime for planet formation applies as in the solar system). This led to studies of the habitable zone around other stars, as well. Finally, we discovered that our data could be used to detect giant planets without transits as we had been carefully timing the eclipses of the stars (using a GPS antenna for time) and this will drift by being offset by any giant planets orbiting around the system, as well. The best summary of our work may be to just summarize the 21 refereed papers produced during the time of this grant. This will be done is chronological order and in each section separately.

Doyle, Laurance R.

1998-01-01

110

Optimizing exoplanet transit searches  

NASA Astrophysics Data System (ADS)

Exoplanet searches using the transit technique are nowadays providing a great number of findings. Most exoplanet transit detection programs that are currently underway are focused on large catalogs of stars with no pre-selection. This necessarily makes such surveys quite inefficient, because huge amounts of data are processed for a relatively low transiting planet yield. In this work we investigate a method to increase the efficiency of a targeted exoplanet search with the transit technique by preselecting a subset of candidates from large catalogs of stars. Assuming spin-orbit alignment, this can be done by considering stars that have higher probability to be oriented nearly equator-on (inclination close to 90°). We use activity-rotation velocity relations for low-mass stars to study the dependence of the position in the activity - v sin(i) diagram on the stellar axis inclination. We compose a catalog of G-, K-, M-type main sequence simulated stars using isochrones, an isotropic inclination distribution and empirical relations to obtain their rotation periods and activity indexes. Then the activity-vsini diagram is filled and statistics are applied to trace the areas containing the higher ratio of stars with inclinations above 80°. A similar statistics is applied to stars from real catalogs with log(R'_{HK}) and v sin(i) data to find their probability of being equator-on. We present the method used to generate the simulated star catalog and the subsequent statistics to find the highly inclined stars from real catalogs using the activity-v sin(i) diagram. Several catalogs from the literature are analysed and a subsample of stars with the highest probability of being equator-on is presented. Assuming spin-orbit alignment, the efficiency of an exoplanet transit search in the resulting subsample of probably highly inclined stars is estimated to be two to three times higher than with a global search with no pre-selection.

Herrero, E.; Ribas, I.; Jordi, C.

2013-05-01

111

Alternative fuel transit buses: The Pierce Transit Success Story  

SciTech Connect

The Pierce transit program for operating mass transit buses on compressed natural gas (CNG) is described. Cost, reliability, fuel efficiency, emission of combustion products, and future trends are discussed.

NONE

1996-10-01

112

Bonding and phase transitions in transition metal dichalcogenide layer compounds  

Microsoft Academic Search

The electronic structure of the transition metal dichalcogenide layer compounds is studied using hybridised orbitals appropriate to the transition metal atom coordination. Non-bonding orbitals on the transition metal atoms give the conduction electron bands which are responsible for the charge-density-wave phase transitions in the VB compounds, and the band structure of 1T- and 2H-TaS2 is found using tight binding. The

J. E. Inglesfield

1980-01-01

113

Transition Planning: A Team Effort. NICHCY Transition Summary, TS10.  

ERIC Educational Resources Information Center

This summary on transition planning provides ideas and information on how students, families, school personnel, service providers, and others can work together to help students with a disability make a smooth transition after leaving high school. It focuses on creative transition planning and services that use all the resources that exist in…

Gutierrez, Mary Kate

114

Calixarene supported transition metal clusters   

E-print Network

This thesis describes a series of calix[n]arene polynuclear transition metal and lanthanide complexes. Calix[4]arenes possess lower-rim polyphenolic pockets that are ideal for the complexation of various transition metal ...

Taylor, Stephanie Merac

2013-06-29

115

Counting Transitive Relations Gotz Pfeiffer  

E-print Network

digraphs or reflexive transitive relations), the number of "soft" orders s(t) (or antisymmetric transitive are for example the books by Harary and Palmer [4], or by Graham, Knuth and Patashnik [3]. Some types

Pfeiffer, Götz

116

The Myths of Mass Transit.  

ERIC Educational Resources Information Center

Criticizes eight commonly held notions about the value of mass transit systems in public transportation programs. Alternative approaches for improving the quality and quantity of urban transit systems are discussed. (AM)

Burke, Catherine G.

1982-01-01

117

Model of contact transitioning with \\  

Microsoft Academic Search

Arcing transition of metal-to-metal contacts is a key technical challenge in the development of railgun launchers. Theoretical understanding of the process remains poor and controversial. Several authors have explained transitioning by a velocity skin effect driven \\

John P. Barber; Yuri A. Dreizin

1995-01-01

118

LAMPF transition region  

SciTech Connect

After describing the transition region between the LAMPF drift-tube linac and side-coupled linac, we discuss the function of the region, its present shortcomings, and the need for a redesign. Then we present the new design, its advantages, and its expected performance. Included are detailed results of beam-dynamics studies giving the ranges of input- and output-beam shapes that can be successfully matched in the new transition region. To improve the present operation of the two linacs, we suggest small changes that will allow us to easily match the beam between the two linacs. Finally we describe the methods used in our beam-dynamic studies so that effects of future improvements to the new design can be examined.

Sander, O.R.

1982-06-01

119

Visual Analytics Technology Transition Progress  

SciTech Connect

The authors provide a description of the transition process for visual analytic tools and contrast this with the transition process for more traditional software tools. This paper takes this into account and describes a user-oriented approach to technology transition including a discussion of key factors that should be considered and adapted to each situation. The progress made in transitioning visual analytic tools in the past five years is described and the challenges that remain are enumerated.

Scholtz, Jean; Cook, Kristin A.; Whiting, Mark A.; Lemon, Douglas K.; Greenblatt, Howard

2009-09-23

120

A Transitive Closure Algorithm  

Microsoft Academic Search

An algorithm is given for computing the transitive closure of a directed graph in a time no greater thana1N1n+a2n2 for largen wherea1 anda2 are constants depending on the computer used to execute the algorithm,n is the number of nodes in the graph andN1 is the number of arcs (not counting those arcs which are part of a cycle and not

Paul Walton Purdom Jr.

1970-01-01

121

Stimulated coherent transition radiation  

SciTech Connect

Coherent radiation emitted from a relativistic electron bunch consists of wavelengths longer than or comparable to the bunch length. The intensity of this radiation out-numbers that of its incoherent counterpart, which extends to wavelengths shorter than the bunch length, by a factor equal to the number of electrons in the bunch. In typical accelerators, this factor is about 8 to 11 orders of magnitude. The spectrum of the coherent radiation is determined by the Fourier transform of the electron bunch distribution and, therefore, contains information of the bunch distribution. Coherent transition radiation emitted from subpicosecond electron bunches at the Stanford SUNSHINE facility is observed in the far-infrared regime through a room-temperature pyroelectric bolometer and characterized through the electron bunch-length study. To measure the bunch length, a new frequency-resolved subpicosecond bunch-length measuring system is developed. This system uses a far-infrared Michelson interferometer to measure the spectrum of coherent transition radiation through optical autocorrelation with resolution far better than existing time-resolved methods. Hence, the radiation spectrum and the bunch length are deduced from the autocorrelation measurement. To study the stimulation of coherent transition radiation, a special cavity named BRAICER is invented. Far-infrared light pulses of coherent transition radiation emitted from electron bunches are delayed and circulated in the cavity to coincide with subsequent incoming electron bunches. This coincidence of light pulses with electron bunches enables the light to do work on electrons, and thus stimulates more radiated energy. The possibilities of extending the bunch-length measuring system to measure the three-dimensional bunch distribution and making the BRAICER cavity a broadband, high-intensity, coherent, far-infrared light source are also discussed.

Hung-chi Lihn

1996-03-01

122

Bus Centric Rapid Transit  

E-print Network

? Increase essential needs within pedestrian shed ? Maximize use of transit: bus or rail 2 Preliminary Alternatives ? No-Build Alternative ? BRT Lite ? Transportation System Management (TSM) Alternative ? Build Alternatives ? BRT Fully...-Dedicated Curbside Lanes ? BRT Partially-Dedicated Curbside Lanes ? BRT Peak-Hour Dedicated Lanes ? BRT Barrier-Separated Lanes ? Rail 3 TSM vs. Dedicated 21 Table 6-3: Mesa Corridor Project BRT Capital Cost Comparison El Paso RTS Corridors 5 BRT Concept...

Banasiak, J.

2011-01-01

123

Managing Critical Transition Zones  

Microsoft Academic Search

Ecosystems that function as critical transition zones (CTZs) among terrestrial, freshwater, and marine habitats are closely\\u000a connected to the ecosystems adjacent to them and are characterized by a rapid flux of materials and organisms. CTZs play various\\u000a roles, including mediating water flows, accumulating sediments and organic matter, processing nutrients, and providing opportunities\\u000a for recreation. They are particularly difficult to manage

Katherine C. Ewel; Claudia Cressa; Ronald T. Kneib; P. S. Lake; Lisa A. Levin; Margaret A. Palmer; Paul Snelgrove; Diana H. Wall

2001-01-01

124

NASA metric transition plan  

NASA Technical Reports Server (NTRS)

NASA science publications have used the metric system of measurement since 1970. Although NASA has maintained a metric use policy since 1979, practical constraints have restricted actual use of metric units. In 1988, an amendment to the Metric Conversion Act of 1975 required the Federal Government to adopt the metric system except where impractical. In response to Public Law 100-418 and Executive Order 12770, NASA revised its metric use policy and developed this Metric Transition Plan. NASA's goal is to use the metric system for program development and functional support activities to the greatest practical extent by the end of 1995. The introduction of the metric system into new flight programs will determine the pace of the metric transition. Transition of institutional capabilities and support functions will be phased to enable use of the metric system in flight program development and operations. Externally oriented elements of this plan will introduce and actively support use of the metric system in education, public information, and small business programs. The plan also establishes a procedure for evaluating and approving waivers and exceptions to the required use of the metric system for new programs. Coordination with other Federal agencies and departments (through the Interagency Council on Metric Policy) and industry (directly and through professional societies and interest groups) will identify sources of external support and minimize duplication of effort.

1992-01-01

125

Anomalous radiative transitions  

NASA Astrophysics Data System (ADS)

Anomalous transitions involving photons derived by many-body interaction of the form partial _{? } G^{? } in the standard model are studied for the first time. This does not affect the equation of motion in the bulk, but modifies the wavefunctions, and causes an unusual transition characterized by a time-independent probability. In the transition probability at a time interval T expressed generally in the form P=T ? _0 +P^{(d)}, now with P^{(d)} ? 0. The diffractive term P^{(d)} has its origin in the overlap of waves of the initial and final states, and reveals the characteristics of waves. In particular, the processes of the neutrino-photon interaction ordinarily forbidden by the Landau-Yang theorem (? _0=0) manifest themselves through the boundary interaction. The new term leads physical processes over a wide energy range to have finite probabilities. New methods of detecting neutrinos using lasers are proposed, based on this diffractive term; these would enhance the detectability of neutrinos by many orders of magnitude.

Ishikawa, Kenzo; Tajima, Toshiki; Tobita, Yutaka

2015-01-01

126

Transitions 2007: Planning for Retirement  

E-print Network

planning, trusts and wills, and health care instructions? Spouses/Partners welcome to attend! A TransitionsTransitions 2007: Planning for Retirement: Strategies, Options, and Information This one-day Transitions program is designed to provide information and to answer any questions you might have about

Southern California, University of

127

Reconstructing Transition Knowledge in Taiwan  

ERIC Educational Resources Information Center

Taking a post-colonial stand and using school to work transition as an example, the author re-examines the special education discourses in Taiwan and attempts to construct alternate understandings of transition from sociological and cultural perspectives. A review of past transition literature and a survey of the educational background of the…

Cheng, Chen-chen

2012-01-01

128

REGIONAL TRANSIT SIGNAL PRIORITY INTEROPERABILITY  

E-print Network

REGIONAL TRANSIT SIGNAL PRIORITY INTEROPERABILITY Mark Pitstick, Ph. D. Chicago Regional · Where? ­ 30 Arterial Corridors · Closing Comments #12;RTA Transit System · 2 million trips per day · 3rd Transportation Authority ­ Chicago Transit Authority ­ Pace Suburban Bus Company ­ Illinois DOT ­ City of Chicago

Minnesota, University of

129

Alameda-Contra Costa Transit District (AC Transit) Fuel Cell Transit Buses: Preliminary Evaluation Results  

SciTech Connect

This report provides an evaluation of three prototype fuel cell-powered transit buses operating at AC Transit in Oakland, California, and six baseline diesel buses similar in design to the fuel cell buses.

Chandler, K.; Eudy, L.

2007-03-01

130

Transition Metal Switchable Mirror  

ScienceCinema

The switchable-mirrors technology was developed by Tom Richardson and Jonathan Slack of Berkeley Lab's Environmental Energy Technologies Division. By using transition metals rather than the rare earth metals used in the first metal-hydride switchable mirrors, Richardson and Slack were able to lower the cost and simplify the manufacturing process. Energy performance is improved as well, because the new windows can reflect or transmit both visible and infrared light. Besides windows for offices and homes, possible applications include automobile sunroofs, signs and displays, aircraft windows, and spacecraft.

None

2010-01-08

131

A Decade of Transition  

NSDL National Science Digital Library

UNICEF last month issued the Monee Report 8, A Decade of Transition, which focuses on the effects of the last decade's changes in Central and Eastern Europe, the Commonwealth of Independent States, and the Baltics on the region's children. The report finds that, while the economies of most of these states are growing and teen birth rates and maternal mortality have dropped, child poverty remains wide-spread and the gap between the rich and poor is growing. Users can download the report by chapter in .pdf format in either English or Russian. Press release and additional information about UNICEF's involvement in the region are also available.

2001-01-01

132

Wetting transition in water.  

PubMed

Optical images were used to study the wetting behavior of water on graphite, sapphire, and quartz along the liquid vapor coexistence curve from room temperature to 300 °C. Wetting transitions were identified by the temperature at which the contact angle decreased to zero and also by the disappearance of dropwise condensation. These two methods yielded consistent values for the wetting temperatures, which were 185 °C, 234 °C, and 271 °C for water on quartz, sapphire, and graphite, respectively. We compare our results with the theoretical predictions based on a simplified model of the water-substrate potential and sharp interfaces. PMID:24329458

Friedman, S R; Khalil, M; Taborek, P

2013-11-27

133

Transition Metal Switchable Mirror  

SciTech Connect

The switchable-mirrors technology was developed by Tom Richardson and Jonathan Slack of Berkeley Lab's Environmental Energy Technologies Division. By using transition metals rather than the rare earth metals used in the first metal-hydride switchable mirrors, Richardson and Slack were able to lower the cost and simplify the manufacturing process. Energy performance is improved as well, because the new windows can reflect or transmit both visible and infrared light. Besides windows for offices and homes, possible applications include automobile sunroofs, signs and displays, aircraft windows, and spacecraft. More information at: http://windows.lbl.gov/materials/chromogenics/default.htm

None

2009-01-01

134

Transition Metal Switchable Mirror  

SciTech Connect

The switchable-mirrors technology was developed by Tom Richardson and Jonathan Slack of Berkeley Lab's Environmental Energy Technologies Division. By using transition metals rather than the rare earth metals used in the first metal-hydride switchable mirrors, Richardson and Slack were able to lower the cost and simplify the manufacturing process. Energy performance is improved as well, because the new windows can reflect or transmit both visible and infrared light. Besides windows for offices and homes, possible applications include automobile sunroofs, signs and displays, aircraft windows, and spacecraft.

2009-08-21

135

Land use, Transit and Jobs Adam Harrington  

E-print Network

Land use, Transit and Jobs Adam Harrington Director of Service Development May 22, 2014 #12;What is Effective Transit? · Transit that carries people · Transit that is a cost-effective use of public funding · Transit that supports efficient development · Transit that provides a basic level of access region-wide 2

Minnesota, University of

136

309 Building transition plan  

SciTech Connect

The preparation for decontamination and decommissioning (transition) of the 309 Building is projected to be completed by the end of the fiscal year (FY) 1998. The major stabilization and decontamination efforts include the Plutonium Recycle Test Reactor (PRTR), fuel storage and transfer pits, Transfer Waste (TW) tanks and the Ion Exchange Vaults. In addition to stabilizing contaminated areas, equipment, components, records, waste products, etc., will be dispositioned. All nonessential systems, i.e., heating, ventilation, and air conditioning (HVAC), electrical, monitoring, fluids, etc., will be shut down and drained/de-energized. This will allow securing of the process, laboratory, and office areas of the facility. After that, the facility will be operated at a level commensurate with its surveillance needs while awaiting D&D. The implementation costs for FY 1995 through FY 1998 for the transition activities are estimated to be $1,070K, $2,115K, $2,939K, and $4,762K, respectively. Costs include an assumed company overhead of 20% and a 30% out year contingency.

Graves, C.E.

1994-08-31

137

Boundary layer transition  

NASA Astrophysics Data System (ADS)

The boundary layer stability, its active control by sound and surface heating and the effect of curvature are studied numerically and experimentally for subsonic flow. In addition, the experimental and flight test data are correlated using the stability theory for supersonic Mach numbers. Active transition fixing and feedback control of boundary layer by sound interactions are experimentally investigated at low speed over an airfoil. Numerical simulation of active control by surface heating and cooling in air shows that by appropriate phase adjustment a reduction in the level of perturbation can be obtained. This simulation is based on the solution of two-dimensional compressible Navier-Stokes equations for a flat plate. Goertler vortices are studied experimentally on an airfoil in the Low Turbulence Pressure Tunnel (LTPT). The flow pattern was visualized using the sublimating chemical technique and data were obtained using a three component laser velocimeter. The effect of curvature on swept leading-edge stability on a cylinder was numerically studied. The results suggest that transition is dominated by traveling disturbance waves and that the waves with the greatest total amplification has an amplitude ratio of e sup 11. Experimental data from the quiet supersonic tunnel and flight tests are analyzed using linear compressible stability theory.

Maestrello, L.; Bayliss, A.; Mangalam, S. M.; Malik, M. R.

1986-12-01

138

Boundary layer transition  

NASA Technical Reports Server (NTRS)

The boundary layer stability, its active control by sound and surface heating and the effect of curvature are studied numerically and experimentally for subsonic flow. In addition, the experimental and flight test data are correlated using the stability theory for supersonic Mach numbers. Active transition fixing and feedback control of boundary layer by sound interactions are experimentally investigated at low speed over an airfoil. Numerical simulation of active control by surface heating and cooling in air shows that by appropriate phase adjustment a reduction in the level of perturbation can be obtained. This simulation is based on the solution of two-dimensional compressible Navier-Stokes equations for a flat plate. Goertler vortices are studied experimentally on an airfoil in the Low Turbulence Pressure Tunnel (LTPT). The flow pattern was visualized using the sublimating chemical technique and data were obtained using a three component laser velocimeter. The effect of curvature on swept leading-edge stability on a cylinder was numerically studied. The results suggest that transition is dominated by traveling disturbance waves and that the waves with the greatest total amplification has an amplitude ratio of e sup 11. Experimental data from the quiet supersonic tunnel and flight tests are analyzed using linear compressible stability theory.

Maestrello, L.; Bayliss, A.; Mangalam, S. M.; Malik, M. R.

1986-01-01

139

MICELLE, the micelle size effect on the LS counting efficiency  

NASA Astrophysics Data System (ADS)

This version extends the computation of the liquid-scintillation counting efficiency to electron-capture radionuclides of 30?Z?54. The simplified deterministic models of previous versions are replaced by a complete stochastic model, which considers all possible subshells involved in the atomic rearrangement of the atom. The program can simulate samples in the gel phase, including the effects of the micelles on the counting efficiency. These effects have been found to be useful for building nanodosimeters based on gel scintillators. Program summaryTitle of program: MICELLE Catalogue identifier:ACPU_v3_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/ACPU_v3_0 Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland Licensing previsions: none Computers revisions: any IBM PC compatible with 80386 or higher Intel processors Operating systems under which the program has been tested: MS-DOS and higher systems Programming language used: FORTRAN 77 Memory required to execute with typical data: 235 kword No. of bits in a word: 16 No. of lines in distributed program, including test data, etc.: 16 653 No. of bytes in distributed program, including test data, etc.: 358 166 Distribution format: tar.gz Nature of the physical problem: Both ? and electron-capture are decay processes characterized by a large variability in energy. In the first case, one single ?-particle is emitted per decay following the Fermi distribution. In the second, several electrons (Auger and/or Coster-Kronig) of very different energies can be ejected simultaneously. The detailed simulation of these two electron release processes has practical interest in two situations: (1) to standardize radionuclides with a liquid-scintillation counter, (2) to compute the absorbed dose in the surroundings of a radiolabeled molecule. Method of solution: Although the application of simplified deterministic models is sufficiently accurate for pure ?-ray emitters, the large stochastic variability of both electron-capture and internal conversion processes restricts the accuracy of the deterministic models KLM, KLMN and KL 1L 2L 3M to nuclides of low atomic numbers. To extend the applicability of the method to larger nuclei, both M- and N-subshells must be included into the model. However, the addition of these outer atom subshells to the deterministic model involves a huge number of atomic rearrangement pathways, requiring from simplifications which are frequently limited to certain nuclides. A more feasible method considers using random numbers to simulate step by step the rearrangement of the atom. Restrictions on the complexity of the problem: The program is restricted to radionuclides of atomic numbers within the interval 30?Z?54. This version ignores the photoionization quench correction, which can be obviated for Z?30. On the other hand, the simulation of the mechanisms of multiple ionization require from more elaborated models for Z>54. Experiments with gases are only available for nuclides with atomic numbers larger than that of 131I, for which the emission of Auger electrons, and consequently the ionization of xenon ( Z=54), stops for transitions outer than N 4O 2O 2.

Grau Carles, A.

2007-02-01

140

Double transit region Gunn diodes  

NASA Astrophysics Data System (ADS)

We report the first epitaxially grown, double transit region Gunn diode oscillator. The prototype device was operated at its second harmonic of 77 GHz, giving an RF output power of 64 mW as compared with 54 mW from the corresponding single transit region device. Measurements of threshold and breakdown voltage and of RF power support the interpretation of coherent nucleation of Gunn domains in the two transit regions and the satisfactory operation of the device.

Lau, K. S.; Tozer, R. C.; David, J. P. R.; Hopkinson, M.; Rees, G. J.; Carr, M.; Priestley, N.; Teoh, Y. P.; Dunn, G. M.

2007-03-01

141

Transit satellite system timing capabilities  

NASA Technical Reports Server (NTRS)

Current time transfer capabilities of the Transit Satellite System are reviewed. Potential improvements in the changes in equipment and operational procedures using operational satellites are discussed.

Finsod, T. D.

1978-01-01

142

Quantum phase transition in space  

SciTech Connect

A quantum phase transition between the symmetric (polar) phase and the phase with broken symmetry can be induced in a ferromagnetic spin-1 Bose-Einstein condensate in space (rather than in time). We consider such a phase transition and show that the transition region in the vicinity of the critical point exhibits scalings that reflect a compromise between the rate at which the transition is imposed (i.e., the gradient of the control parameter) and the scaling of the divergent healing length in the critical region. Our results suggest a method for the direct measurement of the scaling exponent {nu}.

Damski, Bogdan [Los Alamos National Laboratory; Zurek, Wojciech H [Los Alamos National Laboratory

2008-01-01

143

Diffusion phase transitions in alloys  

NASA Astrophysics Data System (ADS)

We present a critical analysis of research on the thermodynamics, kinetics, and morphology of diffusion phase transitions in alloys. We show that diffusion phase transitions are mainly driven by the chemical potential difference due to a change in the sign of the chemical interaction among the component atoms. We explain how the sign of the chemical interaction energy can be obtained from experimental measurements. Examples are given to illustrate the kinetics and morphology of the ordering-separation phase transition in Ni- and Co-based alloys. We show how introducing the concept of the ordering-separation phase transition may affect our thinking in this area.

Ustinovshchikov, Yu I.

2014-07-01

144

Wetting transitions of Ne  

NASA Astrophysics Data System (ADS)

We report studies of the wetting behavior of Ne on very weakly attractive surfaces, carried out with the grand canonical Monte Carlo method. The Ne-Ne interaction was taken to be of Lennard-Jones form, while the Ne-surface interaction was derived from an ab initio calculation of Chizmeshya et al. [J. Low Temp. Phys. 110, 677 (1998)]. Nonwetting behavior was found for Li, Rb, and Cs in the temperature regime explored (i.e., T<42 K). Drying behavior was manifested in a depleted fluid density near the Cs surface. In contrast, for the case of Mg (a more attractive potential) a prewetting transition was found near T=28 K. This temperature was found to shift slightly when a corrugated potential was used instead of a uniform potential. The isotherm shape and the density profiles did not differ qualitatively between these cases.

Bojan, M. J.; Stan, G.; Curtarolo, S.; Steele, W. A.; Cole, M. W.

1999-01-01

145

Hybrid Electric Transit Bus  

NASA Technical Reports Server (NTRS)

A government, industry, and university cooperative is developing an advanced hybrid electric city transit bus. Goals of this effort include doubling the fuel economy compared to current buses and reducing emissions to one-tenth of current EPA standards. Unique aspects of the vehicle's power system include the use of ultra-capacitors as an energy storage system, and a planned natural gas fueled turbogenerator developed from a small jet engine. Power from both the generator and energy storage system is provided to a variable speed electric motor attached to the rear axle. At over 15000 kg gross weight, this is the largest vehicle of its kind ever built using ultra-capacitor energy storage. This paper describes the overall power system architecture, the evolution of the control strategy, and its performance over industry standard drive cycles.

Viterna, Larry A.

1997-01-01

146

Transition Mathematics Project  

NSDL National Science Digital Library

The Transition Mathematics Project (TMP) was created in 2004 "to help students successfully progress from high school math to college-level math." Since its inception, TMP has worked with a range of partners including high school and college math educators. First-time visitors should check out the Resources area, which includes a number of useful tools such as "Agile Mind" (a web-based platform for educators to develop contextually rich math curricula and instructional materials). The Communication area features a semi-annual newsletter and a compilation of current "Math in the News" articles and publications related to TMP. The Results page features information about the successes of TMP's previous projects with progress reports and other documents.

147

NASA CONNECT: Venus Transit  

NSDL National Science Digital Library

In this program, students learn about the importance of using scale models to represent the size and distance of objects in the Solar System and beyond. They are introduced to the astronomical unit (AU), the baseline distance from the Earth to the Sun, which astronomers use to determine the relative distances from Earth to other planets, stars, asteroids, and objects in space. They also discover facts about the Venus Transit, a celestial and historical event, which helped astronomers determine the scale of the Solar System. Students use measurement, ratios, and graphing to construct a model of the solar system and determine the relationship of each planet to the Sun. They will explore the scales needed to represent the size of the planets and the distances to the Sun.

2004-01-01

148

Pubertal transitions in health.  

PubMed

Puberty is accompanied by physical, psychological, and emotional changes adapted to ensure reproductive and parenting success. Human puberty stands out in the animal world for its association with brain maturation and physical growth. Its effects on health and wellbeing are profound and paradoxical. On the one hand, physical maturation propels an individual into adolescence with peaks in strength, speed, and fitness. Clinicians have viewed puberty as a point of maturing out of childhood-onset conditions. However, puberty's relevance for health has shifted with a modern rise in psychosocial disorders of young people. It marks a transition in risks for depression and other mental disorders, psychosomatic syndromes, substance misuse, and antisocial behaviours. Recent secular trends in these psychosocial disorders coincide with a growing mismatch between biological and social maturation, and the emergence of more dominant youth cultures. PMID:17398312

Patton, George C; Viner, Russell

2007-03-31

149

Radar in transition  

NASA Astrophysics Data System (ADS)

It is pointed out that radar engineers, at the end of 1984, find their field in transition between the conventional designs of the post War II era and the digitally controlled, solid-state systems which will be in place for the year 2000. The U.S. Navy has two major phased array radar systems in operation, including the rotating three-dimensional (3D) AN/SPS-48, and the phased-scanned AN/SPY-1 (Aegis) radars. The Aegis represents a major step beyond the conventional 3D and mechanical fire-control radars. However, it requires a special ship, dedicated to its use. Attention is given to questions regarding an extension of the application of Aegis technology to other U.S. Navy applications and to other navies, an ambitious solid-state radar program in the UK, and Army radars.

Barton, D. K.

1984-12-01

150

Light Rail Transit Association  

NSDL National Science Digital Library

Light rail has been an effective form of transportation for many years, and it is quite common in the US and throughout Europe. The Web site of the Light Rail Transit Association (LRTA) has extensive news, historical background, and information about light rail systems. A good overview of light rail is given that outlines its advantages over other transportation methods. One of the best features of the site is its world systems list, which is frequently updated with new light rail projects across the globe. There are also photo galleries of several light rail cars in operation in different countries. Only members can access the LRTA magazines, but the rest of the site's resources are available to anyone.

1998-01-01

151

Probiotics in transition.  

PubMed

Despite the hyperbole often linked with a popular research field, the scientific rationale for probiotics is sound. The probiotic concept is not new but is undergoing transition as knowledge of the gut microbiota in health and disease becomes translated to the clinic. Operationally, a probiotic represents a mimic of and/or supplement to the normal gut microbiota. Much confusion has arisen among consumers because of media misportrayals of probiotics as all being the same. However, with clarification of the molecular basis of host-microbe interactions, the selection criteria for probiotics and the delineation of their distinct mechanisms of action are improving. Most probiotics are from the genus Lactobacillus or Bifidobacterium; this is likely to change and diversify. Similarly, the development of new therapeutic strategies, such as the development of phagebiotics, psychobiotics, and genetically modified pharmabiotics, is poised to become a therapeutic reality. PMID:23010563

Shanahan, Fergus; Dinan, Timothy G; Ross, Paul; Hill, Colin

2012-11-01

152

Phase transitions in disordered systems  

NASA Astrophysics Data System (ADS)

Disorder can have a wide variety of consequences for the physics of phase transitions. Some transitions remain unchanged in the presence of disorder while others are completely destroyed. In this thesis we study the effects of disorder on several classical and quantum phase transitions in condensed matter systems. After a brief introduction, we study the ferromagnetic phase transition in a randomly layered Heisenberg magnet using large-scale Monte-Carlo simulations. Our results provide numerical evidence for the exotic infinite-randomness scenario. We study classical and quantum smeared phase transitions in substitutional alloys A1-xBx. Our results show that the disorder completely destroys the phase transition with a pronounced tail of the ordered phase developing for all compositions x < 1. In addition, we find that short-ranged disorder correlations can have a dramatic effect on the transition. Moreover, we show an experimental realization of the composition-tuned ferromagnetic-to-paramagnetic quantum phase transition in Sr1-xCa xRuO3. We investigate the effects of disorder on first-order quantum phase transitions on the example of the N-color quantum Ashkin-Teller model. By means of a strong disorder renormalization group, we demonstrate that disorder rounds the first-order transition to a continuous one for both weak and strong coupling between the colors. Finally, we investigate the superfluid-insulator quantum phase transition of one-dimensional bosons with off-diagonal disorder by means of large-scale Monte-Carlo simulations. Beyond a critical disorder strength, we find nonuniversal, disorder dependent critical behavior.

Hrahsheh, Fawaz Y.

153

Partnership Transitions and Maternal Parenting  

ERIC Educational Resources Information Center

We use data from the Fragile Families and Child Wellbeing Study (N = 1,975) to examine the association between mothers' partnership changes and parenting behavior during the first 5 years of their children's lives. We compare coresidential with dating transitions and recent with more distal transitions. We also examine interactions between…

Beck, Audrey N.; Cooper, Carey E.; McLanahan, Sara; Brooks-Gunn, Jeanne

2010-01-01

154

Dynamics of human postural transitions  

Microsoft Academic Search

In the present study, the authors examined transitions between postural coordination modes involved in human stance. The analysis was motivated by dynamical theories of pattern formation, in which coordination modes and transitions between modes are emergent, self-organized properties of the dynamics of animal- environment systems. In 2 experiments, standing participants tracked a moving target with the head. Results are consistent

Benoit G. Bardy; Olivier Oullier; Reinoud J. Bootsma; Thomas A. Stoffregen

2002-01-01

155

Brunton Pocket Transit, 1960s  

USGS Multimedia Gallery

First patented in 1894, the pocket transit is a relatively simple instrument which provides horizontal and vertical readings; it has adjustable sights and also can function as a plumb bob. The pocket transit is commonly used in geologic mapping, surveying and claim staking. Although the basic design...

2009-07-20

156

Confinement regime transitions in ASDEX  

Microsoft Academic Search

The authors give an overview of the different confinement regimes observed on ASDEX and compare the changes during the transition phases with qualitative tendencies suggested by theoretical models. The transitions discussed are those between purely Ohmic heating and additional heating in the L-regime between the L- and the H-regime and between discharges with flat and peaked electron density profiles.

K. Lackner; O. Gruber; F. Wagner; G. Becker; M. Bessenrodt-Weberpals; B. Bomba; H.-S. Bosch; H. Bruhns; R. Buchse; A. Carlson; G. Dodel; A. Eberhagen; H.-U. Fahrbach; G. Fussmann; O. Gehre; J. Gernhardt; L. Giannone; S. von Goeler; K. Grassie; G. Haas; H. Herrmann; J. Hofmann; E. Holzhauer; K. Hubner; G. Janeschitz; A. Kallenbach; F. Karger; M. Kaufmann; O. Kluber; M. Kornherr; K. Krieger; J. Kucinski; R. Lang; G. Lisitano; H. M. Mayer; K. McCormick; D. Meisel; V. Mertens; E. R. Muller; H. D. Murmann; J. Neuhauser; H. Niedermeyer; R. Nolte; J. M. Noterdaeme; W. Poschenrieder; L. B. Ran; D. E. Roberts; H. Rohr; J. Roth; A. Rudyj; F. Ryter; W. Sandmann; F. Schneider; U. Schneider; W. Schneider; G. Siller; E. Speth; F. X. Soldner; A. Stabler; K. H. Steuer; U. Stroth; J. Szigeti; E. Taglauer; N. Tsois; H. Verbeek; O. Vollmer; R. Wunderlich; H. Wurz; H. R. Yang; H. Zohm

1989-01-01

157

IDEA Reauthorized Statute SECONDARY TRANSITION  

E-print Network

include: Alignment With the No Child Left Behind Act; Changes in Initial Evaluation and Reevaluation from the term "transition services" now refers to a "child" instead of a "student," The definition of "transition services" is changed to refer to a "child," rather than a "student," with a disability. [602

158

Denaturation transition of stretched DNA  

E-print Network

We generalize the Poland-Scheraga model to consider DNA denaturation in the presence of an external stretching force. We demonstrate the existence of a force-induced DNA denaturation transition and obtain the temperature-force phase diagram. The transition is determined by the loop exponent $c$ for which we find the new value $c=4\

Andreas Hanke; Martha G. Ochoa; Ralf Metzler

2008-01-10

159

The energy transition Gerald Leach  

E-print Network

in biomass-using sectors, port and other sectors which rely on modern forms the dynamics of the energy transition at the national of energy. This article discusses only the pure form level can be gauged onlyThe energy transition Gerald Leach The paper considers the substitution of tradition

Kammen, Daniel M.

160

Adult Transition Program without Walls  

ERIC Educational Resources Information Center

Best practices in adult transition special education for moderate to severe students suggest student-centered planning that maximizes independence in adult life. Based on the above sources, school districts and governing boards would best serve moderate to severe transition special education students with increasing integration into the community…

Moberg, Eric

2010-01-01

161

Detection by Transit Photometry  

NASA Technical Reports Server (NTRS)

A periodic sequence of planetary transits provides a valid detection of an orbiting planet and provides the relative size of the planet and its orbital period. Ancillary measurements of the stellar spectrum and the variations of the star's radial velocity or position combined with stellar models allow the absolute size of the planet and its mass to be obtained. The results of this approach have already shown that the planet orbiting HD209458 has only 70% of the mass of Jupiter, but is nearly 50% larger in radius. Based on models of planetary structure, these results imply that the planet must have spent most of its lifetime so close to the star that it has not been able to cool and contract as have the giant planets in our Solar System. Thus its density is much less than Jupiter and Saturn and is actually less than that of water; i.e., about 0.4 gr/cu cm. If more sensitive measurements of the light curve of stars with closely orbiting planets can be made that provide the varying amplitude of the light reflected by the planet at various phases in its orbit, then characteristics of the planetary atmosphere can be obtained. Potentially, these data can identify major molecular species present in the atmosphere and tell us if clouds are present and yield the phase function of the aerosols. Although such detail cannot be obtained for Earth-size planets because their signal amplitudes are too small, it is possible to get data critical to the determination of the structure of extrasolar planetary systems. In particular, the size distributions and their orbital distributions can be measured by the transit photometry missions now in development. The COROT mission should be able to find large terrestrial planets in short-period orbits while the more ambitious Kepler and Eddington missions should be able to detect planets even smaller than the Earth and at orbital distances that place them in the habitable zone of their stars.

Borucki, William J.; Koch, David G.; Jenkins, Jon M.; DeVincenzi, D. (Technical Monitor)

2002-01-01

162

Transit Market Index Validating Local Potential for  

E-print Network

Transit Market Index Validating Local Potential for Transit Ridership #12;Transit Market Areas Characteristics -- 2010 TPP Characterized by different levels of transit service. Core Areas, 1 & 2: A variety-period service. Area 4: Potential for siting of park-and-rides and peak- period express. #12;#12;Transit Market

Minnesota, University of

163

Transit Project Development in Uncertain Times  

E-print Network

Transit Project Development in Uncertain Times May 23, 2012 #12;Redlands Corridor, CA #12;Project Goals · improve transit travel time · enhance transit options · use the transit corridor to focus ­ AB 32 and SB 375 #12;Conceptual Alternatives · Build alternatives considered: ­ Bus Rapid Transit

Minnesota, University of

164

The vortex explosion transition  

NASA Astrophysics Data System (ADS)

In type-II superconductors an applied magnetic field B, between the lower and upper critical values, produces a mixed state containing Abrikosov vortices. These vortices contain a quantum of magnetic flux h/2e and consist of a core with depressed order parameter and a pattern of perpetually circulating supercurrents. When B is applied parallel to a thin film, the circulating supercurrents get squeezed by the film surfaces causing the vortex core to become unstable and explode all the way across the film when the thickness d is below the critical value of dc = 4.4?; here ? is the superconducting coherence length. For temperatures above the explosion condition dc(T) > d, the applied B cannot induce single parallel vortices, however perpendicular vortices can be generated spontaneously by thermal fluctuations. We observe a transition from non-dissipative to dissipative behavior at the explosion condition and find that the dynamics of the spontaneous perpendicular vortices can be tuned by the pairbreaking effect of the applied parallel field.

Kunchur, M. N.; Liang, M.; Gurevich, A.

2013-02-01

165

The Visibility of Earth Transits  

NASA Technical Reports Server (NTRS)

The recent photometric detection of planetary transits of the solar-like star HD 209458 at a distance of 47 parsecs suggest that transits can reveal the presence of Jupiter-size planetary companions in the solar neighborhood. Recent space-based transit searches have achieved photometric precision within an order of magnitude of that required to detect the much smaller transit signal of an earth-size planet across a solar-size star. Laboratory experiments in the presence of realistic noise sources have shown that CCDs can achieve photometric precision adequate to detect the 9.6 E-5 dimming of the Sun due to a transit of the Earth. Space-based solar irradiance monitoring has shown that the intrinsic variability of the Sun would not preclude such a detection. Transits of the Sun by the Earth would be detectable by observers that reside within a narrow band of sky positions near the ecliptic plane, if the observers possess current Earth epoch levels of technology and astronomical expertise. A catalog of solar-like stars that satisfy the geometric condition for Earth transit visibility are presented.

Castellano, Timothy P.; Doyle, Laurance; McIntosh, Dawn; DeVincenzi, Donald (Technical Monitor)

2000-01-01

166

The Visibility of Earth Transits  

NASA Technical Reports Server (NTRS)

The recent detection of planetary transits of the solar-like star HD 209458 at a distance of 47 parsecs suggest that transits can reveal the presence of Jupiter-size planetary companions in the solar neighborhood. Recent space-based transit searches have achieved photometric precision within an order of magnitude of that required to detect the much smaller transit signal of an earth-size planet around a solar-size star. Laboratory experiments in the presence of realistic noise sources have shown that CCDs can achieve photometric precision adequate to detect the 9.6 E-5 dimming, of the Sun due to a transit of the Earth. Space-based solar irradiance monitoring has shown that the intrinsic variability of the Sun would not preclude such a detection. Transits of the Sun by the Earth would be detectable by observers that reside within a narrow band of sky positions near the ecliptic plane, if the observers possess current Earth epoch levels of technology and astronomical expertise. A catalog of candidate target stars, their properties, and simulations of the photometric Earth transit signal detectability at each target is presented.

Castellano, Tim; DeVincenzi, Donald L. (Technical Monitor)

2000-01-01

167

Photometry and transit-timing analysis for eleven transiting exoplanets  

E-print Network

This thesis presents time-series photometry of transits of 11 different extrasolar planets. Observations were conducted with the Fred L. Whipple Observatory 1.2m telescope and the Wise Observatory im telescope, in standard ...

De Kleer, Katherine Rebecca

2009-01-01

168

Selenophene transition metal complexes  

SciTech Connect

This research shows that selenophene transition metal complexes have a chemistry that is similar to their thiophene analogs. Selenophene coordination has been demonstrated and confirmed by molecular structure in both the {eta}{sup 5}- and the {eta}{sup 1}(Se)-coordination modes. The reaction chemistry of selenophene complexes closely resembles that of the analogous thiophene complexes. One major difference, however, is that selenophene is a better donor ligand than thiophene making the selenophene complexes more stable than the corresponding thiophene complexes. The {sup 77}Se NMR chemical shift values for selenophene complexes fall within distinct regions primarily depending on the coordination mode of the selenophene ligand. In the final paper, the C-H bond activation of {eta}{sup 1}(S)-bound thiophenes, {eta}{sup 1}(S)-benzothiophene and {eta}{sup 1}(Se)-bound selenophenes has been demonstrated. The deprotonation and rearrangement of the {eta}{sup 1}(E)-bound ligand to the carbon bound L-yl complex readily occurs in the presence of base. Reprotonation with a strong acid gives a carbene complex that is unreactive towards nucleophilic attack at the carbene carbon and is stable towards exposure to air. The molecular structure of [Cp(NO)(PPh{sub 3})Re(2-benzothioenylcarbene)]O{sub 3}SCF{sub 3} was determined and contains a Re-C bond with substantial double bond character. Methyl substitution for the thienylcarbene or selenylcarbene gives a carbene that rearranges thermally to give back the {eta}{sup 1}(E)-bound complex. Based on these model reactions, a new mechanism for the H/D exchange of thiophene over the hydrodesulfurization catalyst has been proposed.

White, C.J.

1994-07-27

169

Controlled quantum evolutions and transitions  

E-print Network

We study the nonstationary solutions of Fokker-Planck equations associated to either stationary or nonstationary quantum states. In particular we discuss the stationary states of quantum systems with singular velocity fields. We introduce a technique that allows to realize arbitrary evolutions ruled by these equations, to account for controlled quantum transitions. The method is illustrated by presenting the detailed treatment of the transition probabilities and of the controlling time-dependent potentials associated to the transitions between the stationary, the coherent, and the squeezed states of the harmonic oscillator. Possible extensions to anharmonic systems and mixed states are briefly discussed and assessed.

N. Cufaro Petroni; S. De Martino; S. De Siena; F. Illuminati

1999-10-15

170

Fluctuation driven electroweak phase transition  

NASA Technical Reports Server (NTRS)

We examine the dynamics of the electroweak phase transition in the early Universe. For Higgs masses in the range 46 less than or = M sub H less than or = 150 GeV and top quark masses less than 200 GeV, regions of symmetric and asymmetric vacuum coexist to below the critical temperature, with thermal equilibrium between the two phases maintained by fluctuations of both phases. We propose that the transition to the asymmetric vacuum is completed by percolation of these subcritical fluctuations. Our results are relevant to scenarios of baryogenesis that invoke a weakly first-order phase transition at the electroweak scale.

Gleiser, Marcelo; Kolb, Edward W.

1991-01-01

171

Measurements of Extrasolar Planetary Transits  

NASA Astrophysics Data System (ADS)

A campaign to measure properties of extrasolar planets using the transit method was undertaken at the University of Dallas using a C-14 telescope and SBIG 2000XM CCD camera. We successfully recorded transits of TrES-1b, Wasp-3, and HatP1. The C-14 exposure and tracking data (on WASP-3) indicate that we can probably effectively monitor stars to 13.5 or 14 magnitude with the C-14. We present the transit data, modeling, and determined planetary characteristics. The equipment used in this research was comparatively inexpensive and widely available and can be implemented at other small universities.

Meziere, Kyle; Wiseman, Nicolas; Rovny, Jared; Dinehart, Elise; Dufrain, Blaise; Bechter, Andrew; Bechter, Eric; Olenick, Richard; Sweeney, Arthur

2010-03-01

172

Charge Density Wave Transitions in the Transition Metal Dichalcogenides  

Microsoft Academic Search

A microscopic Hamiltonian descriptive of the charge density wave (C.D.W.) transitions occurring in the 2H transition metal dichalcogenides is presented. From existing band structure calculations of these highly two dimensional compounds, the essential electronic feature is proposed to be the six equivalent (GAMMA)-K saddle points of the conduction band which in the two dimensional limit produce a logarithmic Van Hove

Gary Kingsbury Scott

1983-01-01

173

42 CFR 136a.31 - Transition period.  

Code of Federal Regulations, 2010 CFR

...AND HUMAN SERVICES INDIAN HEALTH Transition Provisions § 136a.31 Transition period. (a) The transition period for full implementation of...grace period; and (3) A health care continuity period determined by...

2010-10-01

174

42 CFR 136a.31 - Transition period.  

Code of Federal Regulations, 2011 CFR

...AND HUMAN SERVICES INDIAN HEALTH Transition Provisions § 136a.31 Transition period. (a) The transition period for full implementation of...grace period; and (3) A health care continuity period determined by...

2011-10-01

175

42 CFR 136a.31 - Transition period.  

Code of Federal Regulations, 2012 CFR

...AND HUMAN SERVICES INDIAN HEALTH Transition Provisions § 136a.31 Transition period. (a) The transition period for full implementation of...grace period; and (3) A health care continuity period determined by...

2012-10-01

176

42 CFR 136a.31 - Transition period.  

...AND HUMAN SERVICES INDIAN HEALTH Transition Provisions § 136a.31 Transition period. (a) The transition period for full implementation of...grace period; and (3) A health care continuity period determined by...

2014-10-01

177

42 CFR 136a.31 - Transition period.  

Code of Federal Regulations, 2013 CFR

...AND HUMAN SERVICES INDIAN HEALTH Transition Provisions § 136a.31 Transition period. (a) The transition period for full implementation of...grace period; and (3) A health care continuity period determined by...

2013-10-01

178

33 CFR 401.89 - Transit refused.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Transit refused. 401.89 Section 401... Regulations General § 401.89 Transit refused. (a) An officer may refuse to allow a vessel to transit when, (1) The vessel is not...

2010-07-01

179

OAKLAND TRANSIT CONNECTOR DOWNTOWN PITTSBURGH TO OAKLAND  

E-print Network

OAKLAND TRANSIT CONNECTOR AND DOWNTOWN PITTSBURGH TO OAKLAND CONNECTOR PITTSBURGH, PA Project;Oakland-Downtown/Oakland Transit Connector TRANSPORTATION ACTION PARTNERSHIP Project Information Document.................................................................................. 7 Populations with High Transit Needs

Blelloch, Guy E.

180

33 CFR 401.89 - Transit refused.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Transit refused. 401.89 Section 401... Regulations General § 401.89 Transit refused. (a) An officer may refuse to allow a vessel to transit when, (1) The vessel is not...

2012-07-01

181

33 CFR 401.89 - Transit refused.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Transit refused. 401.89 Section 401... Regulations General § 401.89 Transit refused. (a) An officer may refuse to allow a vessel to transit when, (1) The vessel is not...

2011-07-01

182

33 CFR 401.89 - Transit refused.  

...2014-07-01 2014-07-01 false Transit refused. 401.89 Section 401... Regulations General § 401.89 Transit refused. (a) An officer may refuse to allow a vessel to transit when, (1) The vessel is not...

2014-07-01

183

33 CFR 401.89 - Transit refused.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Transit refused. 401.89 Section 401... Regulations General § 401.89 Transit refused. (a) An officer may refuse to allow a vessel to transit when, (1) The vessel is not...

2013-07-01

184

Transitions: From Pediatric to Adult Health Care  

MedlinePLUS

... Businesses & Schools > Transitions Transitions From Pediatric to Adult Health Care Transitioning from teenage years to adulthood can be ... management and make more independent judgments about their health care needs. NDEP has assembled the materials below to ...

185

Parity nonconservation in atomic Zeeman transitions  

SciTech Connect

We discuss the possibility of measuring nuclear anapole moments in atomic Zeeman transitions and perform the necessary calculations. Advantages of using Zeeman transitions include variable transition frequencies and the possibility of enhancement of parity nonconservation effects.

Angstmann, E. J.; Dinh, T. H.; Flambaum, V. V. [School of Physics, University of New South Wales, Sydney 2052 (Australia)

2005-11-15

186

76 FR 47296 - Transit Asset Management (TAM) Pilot Program Funds  

Federal Register 2010, 2011, 2012, 2013

...DEPARTMENT OF TRANSPORTATION Federal Transit Administration Transit Asset Management (TAM) Pilot Program Funds AGENCY: Federal Transit Administration (FTA), DOT. ACTION: Transit Asset Management...

2011-08-04

187

Moved by a Rapid Transit  

NASA Astrophysics Data System (ADS)

Enticing by virtue of its predictability, historical utility, and spectacle, the transit of Venus is a niche event among astronomical phenomena. Though the value of a transit for scientific purposes is now diminished, the brief appearance of Venus silhouetted against the background of the Sun in 2004 moved the artistic community to celebrate the rare alignment. Artists of all ages combined old traditions with fresh technology to create a 21st-century tapestry of music, sculpture, paintings, glasswork, quilts, sky shows, and digital imagery. A full catalog of transit-related art generated over the centuries would feature the sampling of entries presented here and at the Moved by a Rapid Transit website.

Bueter, C.

2013-04-01

188

Personal Rapid Transit Informational Forum  

E-print Network

.................................................. 1 Presentation: Context for PRT and Potential Applications....................... 2 Presentation: PRT Niches.............................................................................. 4 PanelUniversityofMinnesotaisanequalopportunityeducatorandemployer. Thispublicationisavailableinalternativeformats,ifrequested. #12;1 Personal rapid transit (PRT), or the use of small, on-demand podcars to serve

Minnesota, University of

189

The cretaceous-tertiary transition.  

PubMed

The fossil sequences from cores across the Cretaceous-Tertiary boundary show a, range of transition times and transition time intervals depending on the fossil indicators and the location of the site. These variations, together with the pattern of iridium distribution with depth at some sites, differences in total amounts of iridium, variations in noble metal abundances normalized to extraterrestrial concentrations, the depositional effects that might be expected in a reducing environment, and the clay mineralogy of the boundary layer clays, put into question the interpretation that an extraterrestrial event was the cause of the faunal changes and the iridium anomaly in the vicinity of the Cretaceous-Tertiary transition. It seems more likely that an explanation for the changes during the transition will come from continued examination of the great variety of terrestrial events that took place at that time, including extensive volcanism, major regression of the sea from the land, geochemical changes, and paleoclimatic and paleoceanographic changes. PMID:17735175

Officer, C B; Drake, C L

1983-03-25

190

Calixarene supported transition metal clusters.  

E-print Network

??This thesis describes a series of calix[n]arene polynuclear transition metal and lanthanide complexes. Calix[4]arenes possess lower-rim polyphenolic pockets that are ideal for the complexation of… (more)

Taylor, Stephanie Merac

2013-01-01

191

ARTS & TRANSIT PROJECT: August 2014  

E-print Network

signal Road closed to through traffic Construction zone Vehicular circulation Pedestrian routes Metered signal Road closed to through traffic Construction zone Metered parking Permit parking ARTS & TRANSIT Road ElmDrive Roundabout Wawa Mid-block crosswalk

192

Transition from Hospital to Home  

MedlinePLUS Videos and Cool Tools

... The Basics of Spinal Cord Injury Rehabilitation Preventing Pressure Sores Transition from Hospital to Home Spasticity, Physical ... technology" help with everyday activities? What is a pressure sore? What are the causes of pressure sores ...

193

A Decade of Fiscal Transition  

Microsoft Academic Search

Transition literature has emphasized stabilization and enterprise restructuring. Both cross-country analyses and country-specific studies have tended to focus on fiscal stabilization and its indicators, highlighting the importance of quantitative fiscal adjustment to stabilization outcomes. Less attention has been paid to the qualitative dimensions of fiscal adjustment in transition.Alam and Sundberg take stock of the extent to which fiscal adjustment has

Asad Alam; Mark Sundberg

2002-01-01

194

Hurricanes Canadian Style: Extratropical Transition  

NSDL National Science Digital Library

This Webcast is based on a presentation delivered by Jim Abraham of MSC at the Winter Weather Course in February 2001. The presentation discusses how, under the right synoptic conditions, hurricanes and tropical storms undergo a transition process to extratropical cyclones as they move into northern latitudes. During the transition process these "hybrid" systems can bring damaging weather conditions to Eastern Canada and the Northeastern States. It uses several case examples to demonstrate the process.

Comet

2002-05-02

195

A study of the cascade Auger process using a cluster calculation.  

PubMed

The Auger process on shallow levels, caused by the Auger process in deeper levels, called "cascade Auger process", were studied. From the measurement result, the cascade Auger process can be clearly observed by the excitation of X-ray tubes instead of a synchrotron radiation source. Applying a theoretical investigation with a cluster calculation to the spectral change of the Ag M(VI,V)VV peak, it was theoretically shown that the cascade Auger process should be correct for explaining the observed spectral change. In addition, it pointed out the existence of a cascade Auger process caused by holes left by the Coster-Kronig process on deeper levels. For the first time the measurement of this process was successful using X-ray tube excitation. PMID:20145328

Fukushima, Sei; Ota, Satoshi

2010-01-01

196

Infrared Transitions in Fe II  

NASA Astrophysics Data System (ADS)

The spectral analysis of the star ? Carinae has been undertaken by Verner et al. [1]. This analysis requires, as input, oscillator strengths of a wide range of transitions. Many of the transitions in the ultraviolet region have recently been studied both experimentally and theoretically (e.g. Pickering et al. [2]). However, the required infrared transitions have received little attention. In this work, we have used configuration interaction methods to calculate oscillator strengths of Fe II transitions of the form 5s- 5p. Both lower and upper states of these transitions are highly excited, so it is necessary also to include many other states in the calculation, partly because of strong configuration interaction mixing between states.[0.3cm] We will present results for these transitions and compare them with results by Raassen and Uylings [3].[0.5cm] [1] Verner E.M. et al., Astrophys. J. 581 1154 (2002) [0.0cm] [2] Pickering J.C. et al., Astron. Astrophys. 396 715 (2002) [0.0cm] [3] Raassen A. J. J., Uylings P. H. M., Astron. Astrophys. 340 300 (1998)

Hibbert, Alan

2005-05-01

197

Spin transitions in FeSpin transitions in Fe Fairy-tale I: What are the spin transitions?  

E-print Network

Spin transitions in FeSpin transitions in Fe Fairy-tale I: What are the spin transitions? Fairy IS LS at 120 GPa #12;#12;Iron spin transition in Earth's mantle S. Speziale, A. Milner, V. E. Lee, S. M, the discovery of spin-pairing in mantle minerals under high pressure has led to a renewed interest in radiative

Cerveny, Vlastislav

198

Transition boiling heat transfer and the film transition regime  

NASA Technical Reports Server (NTRS)

The Berenson (1960) flat-plate transition-boiling experiment has been recreated with a reduced thermal resistance in the heater, and an improved access to those portions of the transition boiling regime that have a steep negative slope. Tests have been made in Freon-113, acetone, benzene, and n-pentane boiling on horizontal flat copper heaters that have been mirror-polished, 'roughened', or teflon-coated. The resulting data reproduce and clarify certain features observed by Berenson: the modest surface finish dependence of boiling burnout, and the influence of surface chemistry on both the minimum heat flux and the mode of transition boiling, for example. A rational scheme of correlation yields a prediction of the heat flux in what Witte and Lienhard (1982) previously identified as the 'film-transition boiling' region. It is also shown how to calculate the heat flux at the boundary between the pure-film, and the film-transition, boiling regimes, as a function of the advancing contact angle.

Ramilison, J. M.; Lienhard, J. H.

1987-01-01

199

Boundary layer transition studies  

NASA Technical Reports Server (NTRS)

A small-scale wind tunnel previously used for turbulent boundary layer experiments was modified for two sets of boundary layer transition studies. The first study concerns a laminar separation/turbulent reattachment. The pressure gradient and unit Reynolds number are the same as the fully turbulent flow of Spalart and Watmuff. Without the trip wire, a laminar layer asymptotes to a Falkner & Skan similarity solution in the FPG. Application of the APG causes the layer to separate and a highly turbulent and approximately 2D mean flow reattachment occurs downstream. In an effort to gain some physical insight into the flow processes a small impulsive disturbance was introduced at the C(sub p) minimum. The facility is totally automated and phase-averaged data are measured on a point-by-point basis using unprecedently large grids. The evolution of the disturbance has been tracked all the way into the reattachment region and beyond into the fully turbulent boundary layer. At first, the amplitude decays exponentially with streamwise distance in the APG region, where the layer remains attached, i.e. the layer is viscously stable. After separation, the rate of decay slows, and a point of minimum amplitude is reached where the contours of the wave packet exhibit dispersive characteristics. From this point, exponential growth of the amplitude of the disturbance is observed in the detached shear layer, i.e. the dominant instability mechanism is inviscid. A group of large-scale 3D vortex loops emerges in the vicinity of the reattachment. Remarkably, the second loop retains its identify far downstream in the turbulent boundary layer. The results provide a level of detail usually associated with CFD. Substantial modifications were made to the facility for the second study concerning disturbances generated by Suction Holes for laminar flow Control (LFC). The test section incorporates suction through interchangeable porous test surfaces. Detailed studies have been made using isolated holes in the impervious test plate that used to establish the Blasius base flow. The suction is perturbed harmonically and data are averaged on the basis of the phase of the disturbance, for conditions corresponding to strong suction and without suction. The technique was enhanced by using up to nine multiple probes to reduce the experimental run-time. In both cases, 3D contour surfaces in the vicinity of the hole show highly 3D TS waves which fan out in the spanwise direction forming bow-shaped waves downstream. The case without suction has proved useful for evaluating calculation methods. With suction, the perturbations on the centerline are much stronger and decay less rapidly, while the TS waves in the far field are similar to the case without suction. Downstream, the contour surfaces of the TS waves develop spanwise irregularities which eventually form into clumps. The spanwise clumping is evidence of a secondary instability that could be associated with suction vortices. Designers of porous surfaces use Goldsmith's Criterion to minimize cross-stream interactions. It is shown that partial TS wave cancellation is possible, depending on the hole spacing, disturbance frequency and free-stream velocity. New high-performance Constant Temperature Hot-Wire Anemometers were designed and built, based on a linear system theory analysis that can be extended to arbitrary order. The motivation was to achieve the highest possible frequency reponse while ensuring overall system stability. The performance is equal to or superior to commercially available instruments at about 10% of the cost. Details, such as fabrication drawings and a parts list, have been published to enable the instrument to be construced by others.

Watmuff, Jonathan H.

1995-01-01

200

Transition Curvature Assessment for High TPI Applications  

Microsoft Academic Search

Transition curvature is a growing concern for high tracks per inch application. Due to low resolution from the playback transducer in cross track direction, the characterization of the transition edge is very difficult. This situation increases the engineering difficulty for writer pole design optimization and recording performance analysis. We have derived a simple transition shape model to study the transition

Xiaodong Che; Na-Young Kim

2006-01-01

201

Regular-route bus Light rail transit  

E-print Network

#12;· Regular-route bus ­Express ­Local · Light rail transit · Commuter rail · Bus rapid transit the Metropolitan Council. · The Legislature should extend the transit taxing district. · The Legislature should of transit in the Twin Cities region. #12;· Compared to 11 peers, including Denver, Phoenix, Portland

Minnesota, University of

202

AST2010 Science Whitepaper JWST Transit Science  

E-print Network

AST2010 Science Whitepaper JWST Transit Science 1 Comparative Planetology: Transiting Exoplanet Science with JWST Mark Clampin, JWST Science Working Group, JWST Transits Working Group, Drake Deming, and Don Lindler 1. Introduction The study of transiting exoplanets has provided most of the key data

Sirianni, Marco

203

Minnesota Transit Conference Mayo Civic Center, Rochester  

E-print Network

Minnesota Transit Conference Mayo Civic Center, Rochester September 15, 2010 Study of Transit, by the Blandin Foundation and AEOA. Pam Smith Marketing/Public Relations Coordinator Arrowhead Transit..."Arrowhead Transit is the best kept secret around" · We do need a new, fresh outlook on what we are doing · We can

Minnesota, University of

204

Electronic transitions of cobalt monoboride  

NASA Astrophysics Data System (ADS)

Electronic transition spectrum of cobalt monoboride (CoB) in the visible region between 495 and 560 nm has been observed and analyzed using laser-induced fluorescence spectroscopy. CoB molecule was produced by the reaction of laser-ablated cobalt atom and diborane (B2H6) seeded in argon. Fifteen vibrational bands with resolved rotational structure have been recorded, which included transitions of both Co10B and Co11B isotopic species. Our analysis showed that the observed transition bands are ?? = 0 transitions with ?? = 2 and ?? = 3 lower states. Four transition systems have been assigned, namely, the [18.1]3?2-X3?2, the [18.3]3?3-X3?3, the [18.6]3- X3?3, and the [19.0]2-X3?2 systems. The bond length, ro, of the X 3?3 state of CoB is determined to be 1.705 Å. The observed rotational lines showed unresolved hyperfine structure arising from the nuclei, which conforms to the Hund's case (a?) coupling scheme. This work represents the first experimental investigation of the CoB spectrum.

Ng, Y. W.; Pang, H. F.; Cheung, A. S.-C.

2011-11-01

205

Electronic transitions of cobalt monoboride.  

PubMed

Electronic transition spectrum of cobalt monoboride (CoB) in the visible region between 495 and 560 nm has been observed and analyzed using laser-induced fluorescence spectroscopy. CoB molecule was produced by the reaction of laser-ablated cobalt atom and diborane (B(2)H(6)) seeded in argon. Fifteen vibrational bands with resolved rotational structure have been recorded, which included transitions of both Co(10)B and Co(11)B isotopic species. Our analysis showed that the observed transition bands are ?? = 0 transitions with ?" = 2 and ?" = 3 lower states. Four transition systems have been assigned, namely, the [18.1](3)?(2)-X(3)?(2), the [18.3](3)?(3)-X(3)?(3), the [18.6]3- X(3)?(3), and the [19.0]2-X(3)?(2) systems. The bond length, r(o), of the X(3)?(3) state of CoB is determined to be 1.705 Å. The observed rotational lines showed unresolved hyperfine structure arising from the nuclei, which conforms to the Hund's case (a(?)) coupling scheme. This work represents the first experimental investigation of the CoB spectrum. PMID:22128936

Ng, Y W; Pang, H F; Cheung, A S-C

2011-11-28

206

Adhesion Transition of Flexible Sheets  

E-print Network

Intermolecular forces are known to precipitate adhesion events between solid bodies. Inspired by a macro-scale experiment showing the hysteretic adhesion of a piece of flexible tape over a plastic substrate, we develop here a model of far-field dry adhesion between two flexible sheets interacting via a power-law potential. We show that phase transitions from unadhered to adhered states occur as dictated by a dimensionless bending parameter representing the ratio of interaction strength to bending stiffness. The order of the adhesion transitions, as well as their hysteretic nature, is shown to depend on the form of the interaction potential between the flexible sheets. When three or more sheets interact, additional geometrical considerations determine the hierarchical or sequential nature of the adhesion transitions.

Arthur A. Evans; Eric Lauga

2009-05-31

207

Transition metals in superheat melts  

NASA Technical Reports Server (NTRS)

A series of experiments with silicate melts doped with transition element oxides was carried out at atmospheric pressures of inert gas at temperatures exceeding liquidus. As predicted from the shape of fO2 buffer curves in T-fO2 diagrams the reducing conditions for a particular oxide-metal pair can be achieved through the T increase if the released oxygen is continuously removed. Experimental studies suggest that transition metals such as Cr or V behave as siderophile elements at temperatures exceeding liquidus temperatures if the system is not buffered by the presence of other oxide of more siderophile element. For example the presence of FeO prevents the reduction of Cr2O3. The sequence of decreasing siderophility of transition elements at superheat conditions (Mo, Ni, Fe, Cr) matches the decreasing degree of depletion of siderophile elements in mantle rocks as compared to chondrites.

Jakes, Petr; Wolfbauer, Michael-Patrick

1993-01-01

208

Rainbow transition in chaotic scattering.  

PubMed

We study the effects of classical chaotic scattering on the differential cross section, which is the measurable quantity in most scattering experiments. We show that the fractal set of singularities in the deflection function is not, in general, reflected on the differential cross section. We show that there are systems in which, as the energy (or some other parameter) crosses a critical value, the system's differential cross-section changes from a singular function having an infinite set of rainbow singularities with structure in all scales to a smooth function with no singularities, the scattering being chaotic on both sides of the transition. We call this metamorphosis the rainbow transition. We exemplify this transition with a physically relevant class of systems. These results have important consequences for the problem of inverse scattering in chaotic systems and for the experimental observation of chaotic scattering. PMID:11909149

de Moura, Alessandro P S; Grebogi, Celso

2002-03-01

209

Certificate Program in Transit Management and Operations Allan Byam, Krystal Oldread, UMass Transit Services  

E-print Network

Certificate Program in Transit Management and Operations Allan Byam, Krystal Oldread, UMass Transit pathways in the U.S. transit industry 2) Offer certificate to college students who are interested in the transit profession. 3) Serve as a model for public transit operators and university partnerships. 4

Massachusetts at Amherst, University of

210

IEEE TRANSACTIONS ON SERVICES COMPUTING, 201X 1 Spot Transit: Cheaper Internet Transit  

E-print Network

IEEE TRANSACTIONS ON SERVICES COMPUTING, 201X 1 Spot Transit: Cheaper Internet Transit for Elastic Internet transit market, where transit is sold using the under-utilized backbone capacity at a lower price. The providers can improve profit by capitalizing the perishable capacity, and customers can buy transit

Li, Baochun

211

THEORY OF MAGNETIC PHASE TRANSITIONS  

E-print Network

The existence of magnetic order (also termed collective magnetism) that is the orderly arrangement of the magnetic spins appearing in materials below an ordering temperature (e.g., the Curie temperature, TC, of a ferromagnet or the Neel temperature, T N, of an antiferromagnet; see Magnetic Moment and Magnetization) points to a class of physical phenomena that can be described as magnetic phase transitions. The thermodynamics of these phase transitions can be described by energy functions (expressed in terms of intensive or extensive variables), in terms of magnetization–temperature (M–T) phase diagrams, or in terms of critical exponents that describe the variation of thermodynamic properties (as a function of the order parameter) as the ordering temperature is approached. In this article, we describe the thermodynamics of magnetic ordering transitions, the order of the transitions, critical exponents, and thermodynamic variables. We further describe magnetic phase transitions within the framework of the mean field Landau theory of phase transitions with discussion of several magnetic equations of state. The discussion of thermodynamic properties begins with the definition of thermodynamic potential functions and their derivatives. For simplicity, we can take pressure and volume as being held constant and consider only magnetic work terms. In this case the entropy (S) and magnetization (M) are extensive variables, the temperature (T) and field (H) are intensive variables, and the different energy functions are the internal energy (U(S, M)), the enthalpy (E(S, H)) (many texts express enthalpy as H, but E is used here to avoid confusion with applied magnetic fields, H), the Helmholtz free

Michael E. Mchenry; David; E. Laughlin; De Tds Mdh; Df Sdtþhdm; Dg Sdt Mdh

212

Phase transition in black holes  

E-print Network

The present thesis is devoted towards the study of various aspects of the phase transition phenomena occurring in black holes defined in an Anti-de-Sitter (AdS) space. Based on the fundamental principles of thermodynamics and considering a grand canonical framework we examine various aspects of the phase transition phenomena occurring in AdS black holes. We analytically check that this phase transition between the smaller and larger mass black holes obey Ehrenfest relations defined at the critical point and hence confirm a second order phase transition. This include both the rotating and charged black holes in Einstein gravity. Apart from studying these issues, based on a canonical framework, we also investigate the critical behavior in charged AdS black holes. The scaling laws for these black holes are found to be compatible with the static scaling hypothesis. Finally, based on the usual framework of AdS/CFT duality, we investigate the phase transition phenomena occurring in charged hairy black holes defined in an asymptotically AdS space. Based on analytic calculations, and using the AdS/CFT dictionary, we explicitly compute the order-parameter for the dual CFT close to the critical point of the phase transition and found that the critical exponent associated with the condensation is $\\frac{1}{2}$, which is the universal result of the mean field theory. Moreover, we also find that in the presence of an external magnetic field, the dual CFT exhibit a perfect diamagnetism at low temperatures, which may be regarded as the reminiscent of the so called Meissner effect.

Dibakar Roychowdhury

2014-03-18

213

OCEAN TECHNOLOGY TRANSITION MARINE SENSOR AND ADVANCED OBSERVING TECHNOLOGY TRANSITION  

E-print Network

selected for funding in the first year of the project: 1) transitioning new ocean acidification sensor Acidification The NOAA Ocean Acidification (OA) Program and U.S. IOOS jointly developed a series of activities across the West Coast, Alaska, and Hawaii to support ocean acidification sensor development

214

Numerical simulation of transitional flow  

NASA Technical Reports Server (NTRS)

The applicability of active control of transition by periodic suction-blowing is investigated via direct simulations of the Navier-Stokes equations. The time-evolution of finite-amplitude disturbances in plane channel flow is compared in detail with and without control. The analysis indicates that, for relatively small three-dimensional amplitudes, a two-dimensional control effectively reduces disturbance growth rates even for linearly unstable Reynolds numbers. After the flow goes through secondary instability, three-dimensional control seems necessary to stabilize the flow. An investigation of the temperature field suggests that passive temperature contamination is operative to reflect the flow dynamics during transition.

Biringen, Sedat

1986-01-01

215

Pseudoscalar meson transition form factors  

NASA Astrophysics Data System (ADS)

The existing data on pseudoscalar meson transition form factors are described by the sophisticated Unitary & Analytic model and are well elaborated for pseudoscalar mesons and 1/2+ octet baryons. Knowing the transition form factors, ?(e+e-?P?) are specified and the contributions of e+e-?P? processes to the muon g-2 anomaly are evaluated with remarkably suppressed errors. Also the two-gamma decay widths of the ?0, ? and ?? pseudoscalar mesons are determined by an alternative method and compared with values given by the newest Review of Particle Physics.

Dubnicka, S.; Dubnickova, A. Z.; Liptaj, A.

2012-04-01

216

Epigenetic switches and network transitions  

NASA Astrophysics Data System (ADS)

We investigate dynamics of gene networks which are regulated by both the fast binding/unbinding of transcription factors to/from DNA and the slow processes of chromatin structural change or histone modification. This heterogeneous dynamics consisting of different time scales is analyzed by the mean-field approximation and the stochastic simulation to show that the network exhibits multiple metastable states and is characterized by transitions among them. We discuss distribution and fluctuation of states of the core gene network of embryonic stem cells as an example of such heterogeneous dynamics and the simulated transitions are compared with the experimental data on the distribution of stem cell states.

Sasai, Masaki

2012-02-01

217

Glass Transition in Confined Geometry  

NASA Astrophysics Data System (ADS)

Extending mode-coupling theory, we elaborate a microscopic theory for the glass transition of liquids confined between two parallel flat hard walls. The theory contains the standard mode-coupling theory equations in bulk and in two dimensions as limiting cases and requires as input solely the equilibrium density profile and the structure factors of the fluid in confinement. We evaluate the phase diagram as a function of the distance of the plates for the case of a hard sphere fluid and obtain an oscillatory behavior of the glass transition line as a result of the structural changes related to layering.

Lang, Simon; Bo?an, Vitalie; Oettel, Martin; Hajnal, David; Franosch, Thomas; Schilling, Rolf

2010-09-01

218

William Crabtree's Venus transit observation  

NASA Astrophysics Data System (ADS)

The close collaboration between the two North-country astronomers Jeremiah Horrocks and William Crabtree gave them special insight into the new astronomy published by the recently-deceased Kepler, whereby Horrocks became the only person to apprehend that the Rudolphine tables were in fact predicting a Venus transit in 1639. This paper focuses especially upon William Crabtree's role and contribution. A comparison is made with an earlier, unsuccessful endeavour by these two concerning a possible transit of Mercury. Much of the record of their work was lost during the civil war. Finally, thanks to Christiaan Huygens, Horrock's manuscript was published by Johannes Hevelius in Danzig, in 1662.

Kollerstrom, Nicholas

2005-04-01

219

Finding Transition Pathways on Manifolds  

E-print Network

We consider noise-induced transition paths in randomly perturbed dynami- cal systems on a smooth manifold. The classical Freidlin-Wentzell large devia- tion theory in Euclidean spaces is generalized and new forms of action functionals are derived in the spaces of functions and the space of curves to accommodate the intrinsic constraints associated with the manifold. Numerical meth- ods are proposed to compute the minimum action paths for the systems with constraints. The examples of conformational transition paths for a single and double rod molecules arising in polymer science are numerically investigated.

Tiejun Li; Xiaoguang Li; Xiang Zhou

2014-08-13

220

Reabsorption of resonant transition radiation  

NASA Astrophysics Data System (ADS)

We study reabsorption of resonant transition radiation (RTR) of fast particles in a magnetoactive plasma with random inhomogeneities of electron density. The RTR growth rates are obtained for isotropic and anisotropic distribution functions of fast electrons. The coefficient of radio wave absorption by thermal electrons near the plasma frequency is obtained. It is shown that the RTR instability can be realized in the case of sufficiently strong anisotropy. The properties of such maser transition radiation allow us to distinguish it from other coherent mechanisms of radiation when interpreting laboratory and astrophysical observation results.

Platonov, K. Yu.; Fleyshman, G. D.

1997-08-01

221

Resonance transitions in Zr VIII  

Microsoft Academic Search

The zirconium spectrum produced in a condensed vacuum spark source was recorded on the 3 m normal-incidence spectrograph of the physics department, Lund University (Sweden) from about 250-2550 AA, using aluminium and gold coated gratings. Thirty lines are classified as 4s24p3-4s4p4 transitions, establishing all eight 4s4p4 levels of Zr VIII. New identification of 18 4s24p3-4s24p24d transitions led the authors to

Z A Khan; M S Z Chaghtai; K Rahimullah

1980-01-01

222

The migration transition in Malaysia.  

PubMed

"Exploring the unique experience of migration transition in Malaysia, this paper identifies the turning points in relation to the level and nature of economic and labor market developments in Malaysia. Examining the development dynamics that mark the passage from exporting labor to depending on foreign labor, the paper concludes that such dynamics are influenced not only by economic but also sociocultural, demographic and policy factors. Several lessons from the Malaysian experience are drawn at the end to be utilized by other countries that still have to reach the turning points of the migration transition." PMID:12320775

Lim, L L

1996-01-01

223

Theoretical Studies of Atomic Transitions  

SciTech Connect

Atomic structure calculations were performed for properties such as energy levels, binding energies, transition probabilities, lifetimes, hyperfine structure, and isotope shifts. Accurate computational procedures were devised so that properties could be predicted even when they could not be obtained from experiment, and to assist in the identification of observed data. The method used was the multiconfiguration Hartree-Fock (MCHF) method, optionally corrected for relativistic effects in the Breit-Pauli approximation. Fully relativistic Dirac-Fock calculations also were performed using the GRASP code A database of energy levels, lifetimes, and transition probabilities was designed and implemented and, at present, includes many results for Be-like to Ar-like.

Charlotte Froese Fischer

2005-07-08

224

Transit Timing Variation Analysis of Ogle-Tr-132b with Seven New Transits  

E-print Network

We report the results of the first transit timing variation analysis of the very hot Jupiter OGLE-TR-132b, using 10 transits collected over a seven-year period. Our analysis combines three previously published transit light ...

Adams, Elisabeth Rose

225

Quantum Phase Transitions Subir Sachdev  

E-print Network

lives, with hardly a second thought. When we boil water for a cup of tea, we observe that the water and liquid water cross each other at 0 C, accounting for the phase transition at this temperature. So far we is quiescent until it reaches a certain temperature (100 C), and then bub- bles appear vigorously until all

226

Gifted Students' Transition to University  

ERIC Educational Resources Information Center

The transition from school to university presents novel demands for all students. Although this educational milestone has been addressed by scholars, particularly those interested in the study of higher education, there is a dearth of literature regarding gifted students' experience of their handling demands of first-year university. In the…

Mendaglio, Sal

2013-01-01

227

Controlled quantum evolutions and transitions  

Microsoft Academic Search

We study the nonstationary solutions of Fokker-Planck equations associated to either stationary or non stationary quantum states. In particular, we discuss the stationary states of quantum systems with singular velocity fields. We introduce a technique that allows arbitrary evolutions ruled by these equations to account for controlled quantum transitions. As a first signficant application we present a detailed treatment of

Nicola Cufaro Petroni; Salvatore De Martino; Silvio De Siena; Fabrizio Illuminati

1999-01-01

228

Transition metal sulfide loaded catalyst  

DOEpatents

A zeolite based catalyst for activation and conversion of methane. A zeolite support includes a transition metal (Mo, Cr or W) sulfide disposed within the micropores of the zeolite. The catalyst allows activation and conversion of methane to C.sub.2 + hydrocarbons in a reducing atmosphere, thereby avoiding formation of oxides of carbon.

Maroni, Victor A. (Naperville, IL); Iton, Lennox E. (Downers Grove, IL); Pasterczyk, James W. (Westmont, IL); Winterer, Markus (Westmont, IL); Krause, Theodore R. (Lisle, IL)

1994-01-01

229

Career Transitions: The Australian Experience.  

ERIC Educational Resources Information Center

This book is designed to aid career counselors in Australia help their clients search for enhanced well-being in their occupations and to help organizations and human resource staff members dealing with employees' career development. The book is organized in four parts. Parts 1 and 2 explore the career transition journey that a typical person…

Stevens, Paul

230

Flexible Scheduling: Making the Transition  

ERIC Educational Resources Information Center

Citing literature that supports the benefits of flexible scheduling on student achievement, the author exhorts readers to campaign for flexible scheduling in their library media centers. She suggests tips drawn from the work of Graziano (2002), McGregor (2006) and Stripling (1997) for making a smooth transition from fixed to flexible scheduling:…

Creighton, Peggy Milam

2008-01-01

231

American Higher Education in Transition  

ERIC Educational Resources Information Center

American higher education is in transition and if there ever was a "golden age" for faculty, it probably is behind us. The best historical data on the composition of faculty is collected annually by the American Mathematical Society. Between 1967 and 2009, the share of full-time faculty with PhDs remained constant at about 90 percent at doctoral…

Ehrenberg, Ronald G.

2011-01-01

232

China's Transition and Feminist Economics  

Microsoft Academic Search

Since 1978 China has been undergoing transition from a socialist to a capitalist economy and the opening up to international trade and investment. This process has been accelerated by WTO membership. This article presents an overview of the gendered processes and outcomes associated with China's reforms, mainly focusing on the post-1992 period when the pace of reforms accelerated. The imperative

Günseli Berik; Xiao-yuan Dong; Gale Summerfield

2007-01-01

233

Presidential Transitions during Capital Campaigns  

ERIC Educational Resources Information Center

In the past few decades, capital campaigns at institutions of higher education have increased in duration, while collegiate presidential tenures have been doing just the opposite. Turnover in the top post was frequent, even during major fundraising campaigns. Before this study, presidential transitions during campaigns had not been previously…

Nehls, Kimberly

2008-01-01

234

"Mexico in Transition." Curriculum Units.  

ERIC Educational Resources Information Center

These curriculum units were developed in a National Endowment for the Humanities 1994 summer seminar "Mexico in Transition." The 23 lessons are written in Spanish. Lessons are entitled: (1) "La Migracion Mexicana Vista a Traves del Cuento 'Paso del Norte' de Juan Rulfo" (Jose Jorge Armendariz); (2) "Los Grupos Indigenas de Mexico: Condiciones…

Oregon Univ., Eugene. Foreign Language Resource Center.

235

GLOBAL TRANSITION TO SUSTAINABLE DEVELOPMENT  

EPA Science Inventory

Global transition to sustainable development is possible but many obstacles lie in the way and it will require acts of political will on the part of both the developed and developing nations to become a reality. In this paper, sustainable development is defined as continuous prog...

236

Preterm Birth: Transition to Adulthood  

ERIC Educational Resources Information Center

Preterm birth is associated with greater difficulty with transitions from childhood to adolescence to adulthood. Adolescents and young adults born preterm have higher rates of cerebral palsy, intellectual disability, cognitive impairment, learning disability, executive dysfunction, attention deficit disorder, and social-emotional difficulties than…

Allen, Marilee C.; Cristofalo, Elizabeth; Kim, Christina

2010-01-01

237

Stadia Hand Transit with Case  

USGS Multimedia Gallery

This instrument was manufactured by Keuffel & Esser Company, New York & New Jersey, serial #2300. Stadia Hand Transits are made of up a small telescope with cross and stadia hairs and a circular box which serves as either a magnetic compass or clinometer. The company sold these instruments from 1910...

2009-07-22

238

New Bottomonium Spectroscopy And Transitions  

SciTech Connect

Recent results in bottomonium spectroscopy are reviewed. Topics include the observation of {Upsilon}(nS) {yields} {eta}{Upsilon}(1S) transitions, energy scans above the {Upsilon}(4S) resonance by the BABAR and Belle experiments, and the recent observation of the {eta}{sub b} by the BABAR experiment.

West, Chris; /SLAC

2011-12-01

239

Turbulence Transition in Pipe Flow  

Microsoft Academic Search

Pipe flow is a prominent example among the shear flows that undergo transition to turbulence without mediation by a linear instability of the laminar profile. Experiments on pipe flow, as well as plane Couette and plane Poiseuille flow, show that triggering turbulence depends sensitively on initial conditions, that between the laminar and the turbulent states there exists no intermediate state

Bruno Eckhardt; Tobias M. Schneider; Bjorn Hof; Jerry Westerweel

2007-01-01

240

The Nature of Transition Blazars  

NASA Astrophysics Data System (ADS)

Blazars are classically divided into the BL Lacertae (BLL) and flat-spectrum radio quasar (FSRQ) subclasses, corresponding to radiatively inefficient and efficient accretion regimes, respectively, largely based on the equivalent width (EW) of their optical broad emission lines (BELs). However, EW-based classification criteria are not physically motivated, and a few blazars have previously "transitioned" from one subclass to the other. We present the first systematic search for these transition blazars in a sample of 602 unique pairs of repeat spectra of 354 blazars in the Sloan Digital Sky Survey, finding six clear cases. These transition blazars have bolometric Eddington ratios of ~0.3 and low-frequency synchrotron peaks, and are thus FSRQ-like. We show that the strong EW variability (up to an unprecedented factor of >60) is due to swamping of the BELs from variability in jet continuum emission, which is stronger in amplitude and shorter in timescale than typical blazars. Although these transition blazars appear to switch between FSRQ and BLL according to the phenomenologically based EW scheme, we show that they are most likely rare cases of FSRQs with radiatively efficient accretion flows and especially strongly beamed jets. These results have implications for the decrease of the apparent BLL population at high redshifts, and may lend credence to claims of a negative BLL redshift evolution.

Ruan, J. J.; Anderson, S. F.; Plotkin, R. M.; Brandt, W. N.; Burnett, T. H.; Myers, A. D.; Schneider, D. P.

2014-12-01

241

Discover Engage Measuring Rail Transit's  

E-print Network

Discover · Engage · Transform Measuring Rail Transit's Sustainability Goals: A Before-A:er, Experimental-Control EvaluaBon of Los Angeles' Expo Light Rail Line Angeles' rail transforma@on · Six new lines opening between 2012 and 2020 · Expo

California at Davis, University of

242

Transition metal sulfide loaded catalyst  

DOEpatents

A zeolite-based catalyst is described for activation and conversion of methane. A zeolite support includes a transition metal (Mo, Cr or W) sulfide disposed within the micropores of the zeolite. The catalyst allows activation and conversion of methane to C[sub 2]+ hydrocarbons in a reducing atmosphere, thereby avoiding formation of oxides of carbon.

Maroni, V.A.; Iton, L.E.; Pasterczyk, J.W.; Winterer, M.; Krause, T.R.

1994-04-26

243

Electrical Conductivity in Transition Metals  

ERIC Educational Resources Information Center

The aim of this "Science Note" is to describe how to test the electron-sea model to determine whether it accurately predicts relative electrical conductivity for first-row transition metals. In the electron-sea model, a metal crystal is viewed as a three-dimensional array of metal cations immersed in a sea of delocalised valence…

Talbot, Christopher; Vickneson, Kishanda

2013-01-01

244

The Approaching Transit of Venus  

Microsoft Academic Search

IN NATURE of the 4th of January last Mr. J. Carpenter gives an interesting sketch of the arrangements in progress for observing the forthcoming Transit of Venus. He states that French and German astronomers have decided on establishing a station of observation at Muscat (Mascate) or at some place between that nasty little port and Teheran. Now, as a point

J. J. Farie

1872-01-01

245

Phase transition in colloidal dispersions  

NASA Astrophysics Data System (ADS)

Dynamic light scattering (DLS) is applied to the glass transition of concentrated N-isopropylacrylamde (NIPA) gel nanoparticle dispersions. These dispersions are treated as simple superatomic systems. Intermediate scattering functions are obtained as the function of temperature and scattering angle. The observed phase behavior is consistent with an essentially hard-sphere interaction between the particles.

Li, Jianyou; Gao, Jun; Hu, Zhibing

2000-10-01

246

Transit Demand Estimation And Crowding Prediction Based On Real-Time Transit Data.  

E-print Network

??With an increasing number of intelligent analytic techniques and increasing networking capabilities, municipal transit authorities can leverage real-time data to estimate transit volume and predict… (more)

Aro, Michael

2014-01-01

247

Composition of transiting and transiting-only super-Earths  

Microsoft Academic Search

The relatively recent detections of the first three transiting super-Earths mark the beginning of a subfield within exoplanets that is both fruitful and challenging. The first step into characterizing these objects is to infer their composition given the degenerate character of the problem. The calculations show that Kepler-10b has a composition between an Earth-like and a Mercury-like (enriched in iron)

Diana Valencia

2011-01-01

248

45 CFR 149.105 - Transition provision.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Transition provision. 149.105 Section 149...SERVICES REQUIREMENTS RELATING TO HEALTH CARE ACCESS REQUIREMENTS FOR THE EARLY... Reinsurance Amounts § 149.105 Transition provision. For a certified...

2011-10-01

249

Resolution requirements for numerical simulations of transition  

NASA Technical Reports Server (NTRS)

The resolution requirements for direct numerical simulations of transition to turbulence are investigated. A reliable resolution criterion is determined from the results of several detailed simulations of channel and boundary-layer transition.

Zang, Thomas A.; Krist, Steven E.; Hussaini, M. Yousuff

1989-01-01

250

45 CFR 149.105 - Transition provision.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Transition provision. 149.105 Section 149...SERVICES REQUIREMENTS RELATING TO HEALTH CARE ACCESS REQUIREMENTS FOR THE EARLY... Reinsurance Amounts § 149.105 Transition provision. For a certified...

2010-10-01

251

45 CFR 149.105 - Transition provision.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Transition provision. 149.105 Section 149...SERVICES REQUIREMENTS RELATING TO HEALTH CARE ACCESS REQUIREMENTS FOR THE EARLY... Reinsurance Amounts § 149.105 Transition provision. For a certified...

2012-10-01

252

45 CFR 149.105 - Transition provision.  

...2014-10-01 2014-10-01 false Transition provision. 149.105 Section 149...Services REQUIREMENTS RELATING TO HEALTH CARE ACCESS REQUIREMENTS FOR THE EARLY... Reinsurance Amounts § 149.105 Transition provision. For a certified...

2014-10-01

253

45 CFR 149.105 - Transition provision.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Transition provision. 149.105 Section 149...SERVICES REQUIREMENTS RELATING TO HEALTH CARE ACCESS REQUIREMENTS FOR THE EARLY... Reinsurance Amounts § 149.105 Transition provision. For a certified...

2013-10-01

254

Mystified by Menopause? A Major Life Transition  

MedlinePLUS

... exit disclaimer . Subscribe Mystified by Menopause? A Major Life Transition Menopause—it’s a transition that looms large ... age 50. It’s sometimes called the “change of life.” Menopause marks the end of menstrual periods and ...

255

OBSERVATIONAL WINDOW FUNCTIONS IN PLANET TRANSIT SURVEYS  

SciTech Connect

The probability that an existing planetary transit is detectable in one's data is sensitively dependent upon the window function of the observations. We quantitatively characterize and provide visualizations of the dependence of this probability as a function of orbital period upon several observing strategy and astrophysical parameters, such as length of observing run, observing cadence, length of night, transit duration and depth, and the minimum number of sampled transits. The ability to detect a transit is directly related to the intrinsic noise of the observations. In our simulations of observational window functions, we explicitly address noncorrelated (Gaussian or white) noise and correlated (red) noise and discuss how these two noise components affect transit detectability in fundamentally different manners, especially for long periods and/or small transit depths. We furthermore discuss the consequence of competing effects on transit detectability, elaborate on measures of observing strategies, and examine the projected efficiency of different transit survey scenarios with respect to certain regions of parameter space.

Von Braun, Kaspar; Kane, Stephen R.; Ciardi, David R. [NASA Exoplanet Science Institute, California Institute of Technology, MC 100-22, Pasadena, CA 91125 (United States)], E-mail: kaspar@ipac.caltech.edu, E-mail: skane@ipac.caltech.edu, E-mail: ciardi@ipac.caltech.edu

2009-09-01

256

Correlations in noisy Landau-Zener transitions  

E-print Network

We analyze the influence of colored classical Gaussian noise on Landau-Zener transitions during a two-level crossing in a time-dependent regular external field. Transition probabilities and coherence factors become random due to the noise. We...

Pokrovsky, Valery L.; Scheidl, S.

2004-01-01

257

Fat-Tree Routing for Transit  

E-print Network

The Transit network provides high-speed, low-latency, fault-tolerant interconnect for high-performance, multiprocessor computers. The basic connection scheme for Transit uses bidelta style, multistage networks to ...

DeHon, Andre

1990-02-01

258

Transition Radiation in QCD matter  

E-print Network

In ultrarelativistic heavy ion collisions a finite size QCD medium is created. In this paper we compute radiative energy loss to zeroth order in opacity by taking into account finite size effects. Transition radiation occurs on the boundary between the finite size medium and the vacuum, and we show that it lowers the difference between medium and vacuum zeroth order radiative energy loss relative to the infinite size medium case. Further, in all previous computations of light parton radiation to zeroth order in opacity, there was a divergence caused by the fact that the energy loss is infinite in the vacuum and finite in the QCD medium. We show that this infinite discontinuity is naturally regulated by including the transition radiation.

Magdalena Djordjevic

2005-12-22

259

Electronic transitions of platinum monoboride  

NASA Astrophysics Data System (ADS)

The electronic transition spectrum of platinum monoboride (PtB) radical has been observed for the first time. Using laser vaporization/reaction free jet expansion and laser induced fluorescence spectroscopy, the optical spectrum of PtB in the visible region between 455 and 520 nm has been studied. Gas-phase PtB molecule was produced by the reaction of diborane (B2H6) seeded in argon and laser ablated platinum atom. Seven vibrational bands of the Pt11B radical have been recorded and analyzed. The observation of Pt isotopic molecules and the Pt10B isotope confirmed the carrier of the bands. Two different transition systems, namely: the [20.2]3/2-X2?+ and the [21.2]1/2-X2?+ systems were identified. PtB was determined to have an X2?+ ground state and the bond length, re, was determined to be 1.741 Å.

Ng, Y. W.; Wong, Yat Sing; Pang, H. F.; Cheung, A. S.-C.

2012-09-01

260

Electronic transitions of platinum monoboride.  

PubMed

The electronic transition spectrum of platinum monoboride (PtB) radical has been observed for the first time. Using laser vaporization?reaction free jet expansion and laser induced fluorescence spectroscopy, the optical spectrum of PtB in the visible region between 455 and 520 nm has been studied. Gas-phase PtB molecule was produced by the reaction of diborane (B(2)H(6)) seeded in argon and laser ablated platinum atom. Seven vibrational bands of the Pt(11)B radical have been recorded and analyzed. The observation of Pt isotopic molecules and the Pt(10)B isotope confirmed the carrier of the bands. Two different transition systems, namely: the [20.2]3/2-X(2)?(+) and the [21.2]1/2-X(2)?(+) systems were identified. PtB was determined to have an X(2)?(+) ground state and the bond length, r(e), was determined to be 1.741 A?. PMID:23020326

Ng, Y W; Wong, Yat Sing; Pang, H F; Cheung, A S-C

2012-09-28

261

Electronic transitions of palladium dimer  

SciTech Connect

The laser induced fluorescence spectrum of palladium dimer (Pd{sub 2}) in the visible region between 480 and 700 nm has been observed and analyzed. The gas-phase Pd{sub 2} molecule was produced by laser ablation of palladium metal rod. Eleven vibrational bands were observed and assigned to the [17.1] {sup 3}II{sub g} - X{sup 3}?{sub u}{sup +} transition system. The bond length (r{sub o}) and vibrational frequency (?G{sub 1/2}) of the ground X{sup 3}?{sub u}{sup +} state were determined to be 2.47(4) Å and 211.4(5) cm{sup ?1}, respectively. A molecular orbital energy level diagram was used to understand the observed ground and excited electronic states. This is the first gas-phase experimental investigation of the electronic transitions of Pd{sub 2}.

Qian, Yue; Ng, Y. W.; Chen, Zhihua; Cheung, A. S.-C., E-mail: hrsccsc@hku.hk [Department of Chemistry, The University of Hong Kong, Pokfulam Road (Hong Kong)

2013-11-21

262

Articulated transition duct in turbomachine  

DOEpatents

Turbine systems are provided. A turbine system includes a transition duct comprising an inlet, an outlet, and a duct passage extending between the inlet and the outlet and defining a longitudinal axis, a radial axis, and a tangential axis. The outlet of the transition duct is offset from the inlet along the longitudinal axis and the tangential axis. The duct passage includes an upstream portion and a downstream portion. The upstream portion extends from the inlet between an inlet end and an aft end. The downstream portion extends from the outlet between an outlet end and a head end. The turbine system further includes a joint coupling the aft end of the upstream portion and the head end of the downstream portion together. The joint is configured to allow movement of the upstream portion and the downstream portion relative to each other about or along at least one axis.

Flanagan, James Scott; McMahan, Kevin Weston; LeBegue, Jeffrey Scott; Pentecost, Ronnie Ray

2014-04-29

263

Venus transits - A French view  

NASA Astrophysics Data System (ADS)

After a careful study of Mars observations obtained by Tycho Brahé (1546-1601), Kepler (1571-1630) discovered the now-called Kepler's third law. In 1627 he published his famous Tabulae Rudolphinae, a homage to his protector Rudolph II (1552-1612), tables (Kepler 1609, 1627) from which he predicted Mercury and Venus transits over the Sun. In 1629 Kepler published his Admonitio ad Astronomos Advertisement to Astronomers (Kepler 1630), Avertissement aux Astronomes in French Au sujet de phénomènes rares et étonnants de l'an 1631: l'incursion de Vénus et de Mercure sur le Soleil. This was the beginning of the interest of French astronomers, among many others, in such transits, mostly for Venus, the subject of this paper in which dates are given in the Gregorian calendar.

Débarbat, Suzanne

2005-04-01

264

Sm Transition Probabilities and Abundances  

E-print Network

Radiative lifetimes, accurate to +/- 5%, have been measured for 212 odd-parity levels of Sm II using laser-induced fluorescence. The lifetimes are combined with branching fractions measured using Fourier-transform spectrometry to determine transition probabilities for more than 900 lines of Sm II. This work is the largest-scale laboratory study to date of Sm II transition probabilities using modern methods. This improved data set has been used to determine a new solar photospheric Sm abundance, log epsilon = 1.00 +/- 0.03, from 26 lines. The spectra of three very metal-poor, neutron-capture-rich stars also have been analyzed, employing between 55 and 72 Sm II lines per star. The abundance ratios of Sm relative to other rare earth elements in these stars are in agreement, and are consistent with ratios expected from rapid neutron-capture nucleosynthesis (the r-process).

J. E. Lawler; E. A. Den Hartog; C. Sneden; J. J. Cowan

2005-10-19

265

Planets in Transit V Passages of Discovery  

NASA Astrophysics Data System (ADS)

Eclipses of the Sun have long influenced culture, history, and science. The analogous but much more subtle phenomena of a transit of the Sun by Mercury was first predicted by Johannes Kepler. Soon, predictions of transits of Venus inspired bold expeditions to better understand the scale of our solar system. These passages of discovery sometimes succeeded scientifically but always captured the public imagination and played an unexpected role in history. The possibility of detecting planets outside the solar system by the transit method was first outlined by Otto Struve in 1952. Early inquiries usually assumed that extrasolar planetary systems would have a distribution of planetary radii and orbital sizes like the solar system. The detection of transits from the ground in such systems would be daunting. The recent, unexpected discovery of a class of extrasolar planets (by the radial velocity technique) with orbital periods less than a week and masses near to the planet Jupiter has resulted in a resurgence of interest in the transit method. These so called "hot Jupiters", can produce transits that are likely enough, frequent enough, the transit method. These so called "hot Jupiters", can produce transits that are likely enough, frequent enough, and deep enough that ground-based transit searches can be successful. In November 1999, a planet orbiting the star HD 209458 was found to transit, and many measurements of the transit have since been made that challenge formation and evolution theories. Numerous ground based searches for transits are now underway. Several planned high precision space-based missions designed to detect transits of earth-sized planets, also have the potential to detect transits of hundreds of "hot Jupiters". These efforts and the upcoming transit of the Sun by Venus on June 8, 2004 present an opportunity for transits to once again capture the public imagination and perhaps play a role in history.

Castellano, T. P.

2003-05-01

266

Phase transition dynamics and gravitational waves  

SciTech Connect

During a first-order phase transition, gravitational radiation is generated either by bubble collisions or by turbulence. For phase transitions which took place at the electroweak scale and beyond, the signal is expected to be within the sensitivity range of planned interferometers such as LISA or BBO. We review the generation of gravitational waves in a first-order phase transition and discuss the dependence of the spectrum on the dynamics of the phase transition.

Megevand, Ariel [Departamento de Fisica, Facultad de Ciencias Exactas y Naturales Universidad Nacional de Mar del Plata, Dean Funes 3350 (7600) Mar del Plata (Argentina)

2009-04-20

267

Microscopic Description of Nuclear Quantum Phase Transitions  

SciTech Connect

The relativistic mean-field framework, extended to include correlations related to restoration of broken symmetries and to fluctuations of the quadrupole deformation, is applied to a study of shape transitions in Nd isotopes. It is demonstrated that the microscopic self-consistent approach, based on global effective interactions, can describe not only general features of transitions between spherical and deformed nuclei, but also the singular properties of excitation spectra and transition rates at the critical point of quantum shape phase transition.

Niksic, T.; Vretenar, D.; Lalazissis, G. A.; Ring, P. [Physics Department, University of Zagreb, Bijenicka 32, Zagreb (Croatia); Department of Theoretical Physics, Aristotle University of Thessaloniki, GR-54124 (Greece); Physik-Department der Technischen Universitaet Muenchen, D-85748 Garching (Germany)

2007-08-31

268

Holographic Berezinskii-Kosterlitz-Thouless Transitions  

SciTech Connect

We find the first example of a quantum Berenzinskii-Kosterlitz-Thouless (BKT) phase transition in two spatial dimensions via holography. This transition occurs in the D3/D5 system at nonzero density and magnetic field. At any nonzero temperature, the BKT scaling is destroyed and the transition becomes second order with mean-field exponents. We go on to conjecture about the generality of quantum BKT transitions in two spatial dimensions.

Jensen, Kristan; Karch, Andreas [Department of Physics, University of Washington, Seattle, Washington 98195-1560 (United States); Son, Dam T.; Thompson, Ethan G. [Institute for Nuclear Theory, University of Washington, Seattle, Washington 98195-1550 (United States)

2010-07-23

269

The Quartz–Coesite Transition  

Microsoft Academic Search

The quartz-coesite transition curve has been determined over the temperature range 700 ø to 1700øC in the pressure range 20 to 40 kb. The equation for the curve is P ---- 19.5 - 0.0112T, where P is in kilobars and T is in degrees centigrade. The determination was made with an internally heated tungsten carbide pressure vessel utilizing talc for

F. R. Boyd; J. L. England

1960-01-01

270

Phase transitions in nuclear matter  

SciTech Connect

The rather general circumstances under which a phase transition in hadronic matter at finite temperature to an abnormal phase in which baryon effective masses become small and in which copious baryon-antibaryon pairs appear is emphasized. A preview is also given of a soliton model of dense matter, in which at a density of about seven times nuclear density, matter ceases to be a color insulator and becomes increasingly color conducting. 22 references.

Glendenning, N.K.

1984-11-01

271

Phase Transitions on Quasicrystalline Surfaces  

Microsoft Academic Search

The sputtering of the surfaces of quasicrystals with Ar^+ changes their chemical composition by preferential removal of particular atomic species. At room temperature, this produces a phase transition at the surface of the icosahedral Al_70Pd_20Mn_10 to a cubic structure. Using secondary-electron imaging (SEI), which reveals the atomic symmetry of surfaces and shallow interfaces in real space, we have investigated the

Bernhard Bolliger

2000-01-01

272

Transition  

E-print Network

. There will be time for a lesson before the evening meal. They are here. Something is very wrong. Other children have been taken, they have seen?they know . . . Emotions threaten to erupt. Control. How to explain? They need comfort, reassurance. I cannot even do... thei/i hetp Tnansition would not be. REFLECTIONS A death has occurred. A child, once living, lives no more. As Vulcan custom dictates, we prepare for the Time of Remembrance. We file into the chapel: Susan and I, four children, Sarek and Amanda. Last...

Welling, Lois

1982-01-01

273

Non-equilibrium phase transitions  

SciTech Connect

This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). Non-equilibrium phase transitions play a central role in a very broad range of scientific areas, ranging from nuclear, particle, and astrophysics to condensed matter physics and the material and biological sciences. The aim of this project was to explore the path to a deeper and more fundamental understanding of the common physical principles underlying the complex real time dynamics of phase transitions. The main emphasis was on the development of general theoretical tools to deal with non-equilibrium processes, and of numerical methods robust enough to capture the time-evolving structures that occur in actual experimental situations. Specific applications to Laboratory multidivisional efforts in relativistic heavy-ion physics (transition to a new phase of nuclear matter consisting of a quark-gluon plasma) and layered high-temperature superconductors (critical currents and flux flow at the National High Magnetic Field Laboratory) were undertaken.

Mottola, E.; Cooper, F.M.; Bishop, A.R.; Habib, S.; Kluger, Y.; Jensen, N.G.

1998-12-31

274

FY 1997 community transition plan  

SciTech Connect

The Department of Energy (DOE) weapons production mission at the Pinellas Plant, in Largo, Florida, was ended after 40 years of service in September 1994. At its peak the Pinellas Plant employed over 2,000 and made a direct financial impact on the region of about $200 million annually. The Pinellas Plant is located in the Tampa Bay metropolitan statistical area (MSA) which has already lost over 9,000 jobs due to defense downsizing. Shutdown of production, transfer of capability to other sites and the cleanup and final turnover of the Pinellas Plant to the community will be completed by October 1, 1997. DOE`s Pinellas Plant close-out mission includes the mitigation of adverse impacts to the communities and workers affected by this reconfiguration of the weapons production complex. The DOE`s primary objective in addressing these impacts is to effectively transition the workers and mitigate the impact on the local community. This transition activity involves stakeholders comprised of local community officials, private citizens, the local business community, former and current workers at the plant and neighbors in the surrounding community. The Pinellas Plant`s Community Reuse Organization (CRO) is dedicated to the creation of jobs through defense conversion and other efforts to stimulate local growth. This report describes the status of the various transition projects.

Not Available

1996-10-01

275

Phase Transition to Exact Susy  

E-print Network

The anthropic principle is based on the observation that, within narrow bounds, the laws of physics are such as to have allowed the evolution of life. The string theoretic approach to understanding this observation is based on the expectation that the effective potential has an enormous number of local minima with different particle masses and perhaps totally different fundamental couplings and space time topology. The vast majority of these alternative universes are totally inhospitable to life, having, for example, vacuum energies near the natural (Planck) scale. The statistics, however, are assumed to be such that a few of these local minima (and not more) have a low enough vacuum energy and suitable other properties to support life. In the inflationary era, the "multiverse" made successive transitions between the available minima until arriving at our current state of low vacuum energy. String theory, however, also suggests that the absolute minimum of the effective potential is exactly supersymmetric. Questions then arise as to why the inflationary era did not end by a transition to one of these, when will the universe make the phase transition to the exactly supersymmetric ground state, and what will be the properties of this final state.

L. Clavelli

2007-03-20

276

The Transiting Exoplanet Survey Satellite  

E-print Network

The Transiting Exoplanet Survey Satellite (TESS) will search for planets transiting bright and nearby stars. TESS has been selected by NASA for launch in 2017 as an Astrophysics Explorer mission. The spacecraft will be placed into a highly elliptical 13.7-day orbit around the Earth. During its two-year mission, TESS will employ four wide-field optical CCD cameras to monitor at least 200,000 main-sequence dwarf stars with I<13 for temporary drops in brightness caused by planetary transits. Each star will be observed for an interval ranging from one month to one year, depending mainly on the star's ecliptic latitude. The longest observing intervals will be for stars near the ecliptic poles, which are the optimal locations for follow-up observations with the James Webb Space Telescope. Brightness measurements of preselected target stars will be recorded every 2 min, and full frame images will be recorded every 30 min. TESS stars will be 10-100 times brighter than those surveyed by the pioneering Kepler missio...

Ricker, George R; Vanderspek, Roland; Latham, David W; Bakos, Gaspar A; Bean, Jacob L; Berta-Thompson, Zachory K; Brown, Timothy M; Buchhave, Lars; Butler, Nathaniel R; Butler, R Paul; Chaplin, William J; Charbonneau, David; Christensen-Dalsgaard, Jorgen; Clampin, Mark; Deming, Drake; Doty, John; De Lee, Nathan; Dressing, Courtney; Dunham, E W; Endl, Michael; Fressin, Francois; Ge, Jian; Henning, Thomas; Holman, Matthew J; Howard, Andrew W; Ida, Shigeru; Jenkins, Jon; Jernigan, Garrett; Johnson, John Asher; Kaltenegger, Lisa; Kawai, Nobuyuki; Kjeldsen, Hans; Laughlin, Gregory; Levine, Alan M; Lin, Douglas; Lissauer, Jack J; MacQueen, Phillip; Marcy, Geoffrey; McCullough, P R; Morton, Timothy D; Narita, Norio; Paegert, Martin; Palle, Enric; Pepe, Francesco; Pepper, Joshua; Quirrenbach, Andreas; Rinehart, S A; Sasselov, Dimitar; Sato, Bun'ei; Seager, Sara; Sozzetti, Alessandro; Stassun, Keivan G; Sullivan, Peter; Szentgyorgyi, Andrew; Torres, Guillermo; Udry, Stephane; Villasenor, Joel

2014-01-01

277

On transit time instability in liquid jets  

NASA Technical Reports Server (NTRS)

A basic transit time instability in flows with disturbances of speed is found. It was shown that the mass distribution is established by and large by the described transit time effects. These transit time effects may also be involved for gas jets.

Grabitz, G.; Meier, G.

1982-01-01

278

Transition Problems and Play as Transitory Activity  

ERIC Educational Resources Information Center

Because too many children experience the transition to school as a culture shock, during the past decade teachers have implemented so-called transition activities in order to bridge the gap between preschool and school. However, transition to school also calls for a development of higher mental functions, among others the development of children's…

Brostrom, Stig

2005-01-01

279

Manager's Guide for Family Leave Transitions  

E-print Network

Cambridge, MA 02138 Crimson Cares including Manager's Guide for Family Leave Transitions 3 #12;GoodManager's Guide for Family Leave Transitions When a member of your team is prepar- ing to go will increase the likelihood of a smooth transition and ap- propriate coverage of job responsibilities. Helping

Wolfe, Patrick J.

280

Anomalous scaling in depinning transitions Onuttom Narayan  

E-print Network

to be careful whether the depinning transition is approached with a time-independent external driving forceAnomalous scaling in depinning transitions Onuttom Narayan Department of Physics, University group RG flows of depinning transitions do not depend on whether the driving force or the system

California at Santa Cruz, University of

281

IDEA 1997 Transition Issues. Parent Brief.  

ERIC Educational Resources Information Center

This brief for parents discusses the transition of students with disabilities from the structured environment of school to the post-school world and transition requirements under the Individuals with Disabilities Education Act (IDEA) of 1997. It begins by explaining the importance of transition planning and decision-making and the need for…

National Center on Secondary Education and Transition, Minneapolis, MN.

282

Transition Modelling for General Purpose CFD Codes  

Microsoft Academic Search

The paper addresses modelling concepts based on the RANS equations for laminar-turbulent transition prediction in general-purpose CFD codes. Available models are reviewed, with emphasis on their compatibility with modern CFD methods. Requirements for engineering transition models suitable for industrial CFD codes are specified. A new concept for transition modeling is introduced. It is based on the combination of experimental correlations

F. R. Menter; R. Langtry; S. Völker

2006-01-01

283

Evidence-Based Practices in Secondary Transition  

ERIC Educational Resources Information Center

A literature review was conducted to identify evidence-based practices in secondary transition using quality indicator checklists for experimental research. Practices were categorized by the Taxonomy for Transition Programming. Overall, 32 secondary transition evidence-based practices were identified. Two practices had a strong level of evidence,…

Test, David W.; Fowler, Catherine H.; Richter, Sharon M.; White, James; Mazzotti, Valerie; Walker, Allison R.; Kohler, Paula; Kortering, Larry

2009-01-01

284

Children's Agency during Transition to Formal Schooling  

ERIC Educational Resources Information Center

Children's transition to school is a key issue in early years of education. Research in this field points to the counterintuitive possibility that the transition to school may actually lead to a reduction rather than a facilitation of children's agency. The paper presents findings of a longitudinal comparative ethnography on children's transition

Huf, Christina

2013-01-01

285

Lost in Transition? Student Food Consumption  

ERIC Educational Resources Information Center

Findings from transition studies as well as studies of student food show that the transition from living at home to independent living influences student food consumption and that food consumption might be problematic during this period. Furthermore, both students' enactment of being in transition and the food habits and practices they bring with…

Blichfeldt, Bodil Stilling; Gram, Malene

2013-01-01

286

ARTS & TRANSIT PROJECT: SeptemberNovember 2014  

E-print Network

ARTS & TRANSIT PROJECT: September­November 2014 (beginning Aug. 28, 2014) Faculty Road ElmStreet College Road Baker Rink MacMillan New South #12;ARTS & TRANSIT PROJECT: September­November 2014 (beginning & TRANSIT PROJECT: September­November 2014 (beginning Aug. 28, 2014) Vehicular Routes Faculty Road Elm

287

Regional Transit System: Return on Investment Assessment  

E-print Network

Regional Transit System: Return on Investment Assessment May 2014 #12;1 Today's agenda Itasca Project introduction Transit ROI objectives Results of analysis Comments from business leaders transit options Enables strategic, efficient investment in long-term infrastructure, e.g., energy grid

Minnesota, University of

288

TRANSIT REALITIES IN THE SUBURBAN GTA  

E-print Network

TRANSIT REALITIES IN THE SUBURBAN GTA Data Management Group Joint Program in Transportation University of Toronto November 1998 #12;TRANSIT REALITIES IN THE SUBURBAN GTA Prepared for Data Management Dalton November 1998 #12;i EXECUTIVE SUMMARY This report looks at current transit realities and trends

Toronto, University of

289

The Menopausal Transition: Guidelines for Researchers.  

ERIC Educational Resources Information Center

Research guidelines are presented to encourage sound research on the menopausal transition. Included is a review of current literature covering three aspects of menopausal transition: age span, changes in menstrual bleeding during the transition, and other psychological and somatic changes during premenopausal stages. (IAH)

Mansfield, Phyllis Kernoff; And Others

1989-01-01

290

School to Work: Making the Transition.  

ERIC Educational Resources Information Center

This publication describes the Academy for Educational Development's (AED's) vision and work in school-to-work transition and related areas. School-to-work transition is defined, and components of a successful school-to-work transition system are listed. The National Institute for Work and Learning (NIWL) is currently conducting an extensive study…

Academy for Educational Development, Washington, DC. National Inst. for Work and Learning.

291

42 CFR 460.52 - Transitional care during termination.  

Code of Federal Regulations, 2011 CFR

...Termination § 460.52 Transitional care during termination. ...writing about termination and transition procedures. (2) Assist...and Medicaid benefits. (3) Transition participants' care to other providers....

2011-10-01

292

42 CFR 460.52 - Transitional care during termination.  

Code of Federal Regulations, 2010 CFR

...Termination § 460.52 Transitional care during termination. ...writing about termination and transition procedures. (2) Assist...and Medicaid benefits. (3) Transition participants' care to other providers....

2010-10-01

293

42 CFR 460.52 - Transitional care during termination.  

Code of Federal Regulations, 2013 CFR

...Termination § 460.52 Transitional care during termination. ...writing about termination and transition procedures. (2) Assist...and Medicaid benefits. (3) Transition participants' care to other providers....

2013-10-01

294

42 CFR 460.52 - Transitional care during termination.  

Code of Federal Regulations, 2012 CFR

...Termination § 460.52 Transitional care during termination. ...writing about termination and transition procedures. (2) Assist...and Medicaid benefits. (3) Transition participants' care to other providers....

2012-10-01

295

Pressure-Induced Electronic Phase Transitions Transition Metal Oxides and Rare Earth Metals  

E-print Network

Pressure-Induced Electronic Phase Transitions in Transition Metal Oxides and Rare Earth Metals Metal Oxides and Rare Earth Metals by Brian Ross Maddox Electron correlation can affect profound changes transition in a transition metal monoxide. iv #12;The lanthanides (the 4f metals also known as rare-earths

Islam, M. Saif

296

Phase transitions for the Lifshitz black holes  

E-print Network

We study possibility of phase transitions between Lifshitz black holes and other configurations by using free energies explicitly. A phase transition between Lifshitz soliton and Lifshitz black hole might not occur in three dimensions. We find that a phase transition between Lifshitz and BTZ black holes unlikely occurs because they have different asymptotes. Similarly, we point out that any phase transition between Lifshitz and black branes unlikely occurs in four dimensions since they have different asymptotes. This is consistent with a necessary condition for taking a phase transition in the gravitational system, which requires the same asymptote.

Yun Soo Myung

2012-07-02

297

TERMS Photometry of Known Transiting Exoplanets  

E-print Network

The Transit Ephemeris Refinement and Monitoring Survey (TERMS) conducts radial velocity and photometric monitoring of known exoplanets in order to refine planetary orbits and predictions of possible transit times. This effort is primarily directed towards planets not known to transit, but a small sample of our targets consist of known transiting systems. Here we present precision photometry for 6 WASP planets acquired during their transit windows. We perform a Markov Chain Monte Carlo (MCMC) analysis for each planet and combine these data with previous measurements to redetermine the period and ephemerides for these planets. These observations provide recent mid-transit times which are useful for scheduling future observations. Our results improve the ephemerides of WASP-4b, WASP-5b and WASP-6b and reduce the uncertainties on the mid-transit time for WASP-29b. We also confirm the orbital, stellar and planetary parameters of all 6 systems.

Dragomir, Diana; Pilyavsky, Genady; Mahadevan, Suvrath; Ciardi, David R; Gazak, J Zachary; Gelino, Dawn M; Payne, Alan; Rabus, Markus; Ramirez, Solange V; von Braun, Kaspar; Wright, Jason T; Wyatt, Pamela

2011-01-01

298

Constraining Orbital Parameters Through Planetary Transit Monitoring  

E-print Network

The orbital parameters of extra-solar planets have a significant impact on the probability that the planet will transit the host star. This was recently demonstrated by the transit detection of HD 17156b whose favourable eccentricity and argument of periastron dramatically increased its transit likelihood. We present a study which provides a quantitative analysis of how these two orbital parameters affect the geometric transit probability as a function of period. Further, we apply these results to known radial velocity planets and show that there are unexpectedly high transit probabilities for planets at relatively long periods. For a photometric monitoring campaign which aims to determine if the planet indeed transits, we calculate the expected transiting planet yield and the significance of a potential null result, as well as the subsequent constraints that may be applied to orbital parameters.

Stephen R. Kane; Kaspar von Braun

2008-08-13

299

Closure Phase Signatures of Planet Transit Events  

E-print Network

Planet transit events present as attractive targets for the ultra-high-resolution capabilities afforded by optical interferometers. Herein is presented an evaluation of the possibility of detection of such events through measurement of high-precision closure phases with the MIRC instrument on the CHARA Array. Recovery of the transit position angle upon the sky appears readily achievable with the existing capabilities of the instrument, along with characterization of other system parameters, such as stellar radius, planet radius, and other parameters of the transit event. This technique is the only one presently available that can provide a transiting planet's orbital plane position angle, and can directly determine the planet's radius independent of any outside observations, appearing able to improve substantially upon other determinations of that radius. Additional directly observed parameters - also not dependent upon transit photometry or spectroscopy - include impact parameter, transit ingress time, transit velocity and stellar radius.

G. T. van Belle

2008-04-16

300

Transitional Care Strategies From Hospital to Home  

PubMed Central

Hospitals are challenged with reevaluating their hospital’s transitional care practices, to reduce 30-day readmission rates, prevent adverse events, and ensure a safe transition of patients from hospital to home. Despite the increasing attention to transitional care, there are few published studies that have shown significant reductions in readmission rates, particularly for patients with stroke and other neurologic diagnoses. Successful hospital-initiated transitional care programs include a “bridging” strategy with both predischarge and postdischarge interventions and dedicated transitions provider involved at multiple points in time. Although multicomponent strategies including patient engagement, use of a dedicated transition provider, and facilitation of communication with outpatient providers require time and resources, there is evidence that neurohospitalists can implement a transitional care program with the aim of improving patient safety across the continuum of care. PMID:25553228

Ranji, Sumant R.

2015-01-01

301

Metal to semiconductor transition in metallic transition metal dichalcogenides  

SciTech Connect

We report on tuning the electronic and magnetic properties of metallic transition metal dichalcogenides (mTMDCs) by 2D to 1D size confinement. The stability of the mTMDC monolayers and nanoribbons is demonstrated by the larger binding energy compared to the experimentally available semiconducting TMDCs. The 2D MX{sub 2} (M?=?Nb, Ta; X?=?S, Se) monolayers are non-ferromagnetic metals and mechanically softer compared to their semiconducting TMDCs counterparts. Interestingly, mTMDCs undergo metal-to-semiconductor transition when the ribbon width approaches to ?13?Å and ?7?Å for zigzag and armchair edge terminations, respectively; then these ribbons convert back to metal when the ribbon widths further decrease. Zigzag terminated nanoribbons are ferromagnetic semiconductors, and their magnetic properties can also be tuned by hydrogen edge passivation, whereas the armchair nanoribbons are non-ferromagnetic semiconductors. Our results display that the mTMDCs offer a broad range of physical properties spanning from metallic to semiconducting and non-ferromagnetic to ferromagnetic that is ideal for applications where stable narrow bandgap semiconductors with different magnetic properties are desired.

Li, Yan; Kang, Jun; Li, Jingbo, E-mail: jbli@semi.ac.cn [State Key Laboratory of Superlattice and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 (China); Tongay, Sefaattin; Wu, Junqiao [Department of Materials Science and Engineering, University of California, Berkeley, California 94720 (United States); Yue, Qu [College of Science, National University of Defense Technology, Changsha 410073 (China)

2013-11-07

302

Metal to semiconductor transition in metallic transition metal dichalcogenides  

NASA Astrophysics Data System (ADS)

We report on tuning the electronic and magnetic properties of metallic transition metal dichalcogenides (mTMDCs) by 2D to 1D size confinement. The stability of the mTMDC monolayers and nanoribbons is demonstrated by the larger binding energy compared to the experimentally available semiconducting TMDCs. The 2D MX2 (M = Nb, Ta; X = S, Se) monolayers are non-ferromagnetic metals and mechanically softer compared to their semiconducting TMDCs counterparts. Interestingly, mTMDCs undergo metal-to-semiconductor transition when the ribbon width approaches to ˜13 Å and ˜7 Å for zigzag and armchair edge terminations, respectively; then these ribbons convert back to metal when the ribbon widths further decrease. Zigzag terminated nanoribbons are ferromagnetic semiconductors, and their magnetic properties can also be tuned by hydrogen edge passivation, whereas the armchair nanoribbons are non-ferromagnetic semiconductors. Our results display that the mTMDCs offer a broad range of physical properties spanning from metallic to semiconducting and non-ferromagnetic to ferromagnetic that is ideal for applications where stable narrow bandgap semiconductors with different magnetic properties are desired.

Li, Yan; Tongay, Sefaattin; Yue, Qu; Kang, Jun; Wu, Junqiao; Li, Jingbo

2013-11-01

303

7 CFR 322.27 - Eligible ports for transit shipments.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 false Eligible ports for transit shipments. 322.27 Section 322...BYPRODUCTS, AND BEEKEEPING EQUIPMENT Transit of Restricted Organisms Through the United States § 322.27 Eligible ports for transit shipments. You may transit...

2012-01-01

304

19 CFR 122.102 - Inspection of baggage in transit.  

...2014-04-01 false Inspection of baggage in transit. 122.102 Section 122.102 Customs...COMMERCE REGULATIONS Accompanied Baggage in Transit § 122.102 Inspection of baggage in transit. (a) General baggage in transit...

2014-04-01

305

19 CFR 122.102 - Inspection of baggage in transit.  

Code of Federal Regulations, 2012 CFR

...2012-04-01 false Inspection of baggage in transit. 122.102 Section 122.102 Customs...COMMERCE REGULATIONS Accompanied Baggage in Transit § 122.102 Inspection of baggage in transit. (a) General baggage in transit...

2012-04-01

306

19 CFR 122.102 - Inspection of baggage in transit.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Inspection of baggage in transit. 122.102 Section 122.102 Customs...COMMERCE REGULATIONS Accompanied Baggage in Transit § 122.102 Inspection of baggage in transit. (a) General baggage in transit...

2011-04-01

307

19 CFR 122.102 - Inspection of baggage in transit.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Inspection of baggage in transit. 122.102 Section 122.102 Customs...COMMERCE REGULATIONS Accompanied Baggage in Transit § 122.102 Inspection of baggage in transit. (a) General baggage in transit...

2010-04-01

308

7 CFR 322.27 - Eligible ports for transit shipments.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 false Eligible ports for transit shipments. 322.27 Section 322...BYPRODUCTS, AND BEEKEEPING EQUIPMENT Transit of Restricted Organisms Through the United States § 322.27 Eligible ports for transit shipments. You may transit...

2010-01-01

309

7 CFR 322.27 - Eligible ports for transit shipments.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 false Eligible ports for transit shipments. 322.27 Section 322...BYPRODUCTS, AND BEEKEEPING EQUIPMENT Transit of Restricted Organisms Through the United States § 322.27 Eligible ports for transit shipments. You may transit...

2013-01-01

310

19 CFR 122.102 - Inspection of baggage in transit.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Inspection of baggage in transit. 122.102 Section 122.102 Customs...COMMERCE REGULATIONS Accompanied Baggage in Transit § 122.102 Inspection of baggage in transit. (a) General baggage in transit...

2013-04-01

311

7 CFR 322.27 - Eligible ports for transit shipments.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 false Eligible ports for transit shipments. 322.27 Section 322...BYPRODUCTS, AND BEEKEEPING EQUIPMENT Transit of Restricted Organisms Through the United States § 322.27 Eligible ports for transit shipments. You may transit...

2011-01-01

312

7 CFR 322.27 - Eligible ports for transit shipments.  

...2014-01-01 false Eligible ports for transit shipments. 322.27 Section 322...BYPRODUCTS, AND BEEKEEPING EQUIPMENT Transit of Restricted Organisms Through the United States § 322.27 Eligible ports for transit shipments. You may transit...

2014-01-01

313

Dengue in the health transition.  

PubMed

The "Health Transition" describes the medical consequences which accompany the demographic transition and development. In many Asian countries, as the infectious diseases of infancy decline, such as diarrhea, acute respiratory disease, measles and malaria, so too, do infant mortality rates. As a consequence of falling infant mortality rates and declines in fertility, the age pyramid has become more rectangular. No longer is nearly half of the population under the age of 15 years. Diseases of adults are beginning to become predominant: trauma, heart disease, cancer, stroke and diabetes. Life expectancy has increased along with costs of the health care system. As a fraction of per capita gross domestic product, health care is beginning to become a major national expense. It is ironic that the one vector-borne infectious disease likely to bridge the health transition in tropical countries is dengue. As evidenced by the experience of Singapore and Taiwan, modern housing and commercial development provide more, rather than fewer breeding places for Aedes aegypti. Greater affluence often means less compliance with mosquito control programs. Meanwhile, the dengue viruses, heeding some unknown genetic imperative, cause ever more severe disease. Modern Asian societies must count dengue as a real and enduring threat. To prevent costly hospitalizations and a sense of social disorder, effective measures must be adopted to achieve a significant reduction of Aedes aegypti populations. Sustained dengue control requires source reduction which, in turn depends upon imaginative leadership, skilled man power, legislative authority, an authentic national research program and intersectoral cooperation. A leadership role beckons for new actors in the control of Aedes aegypti: large municipalities, environmental agencies and the private sector. PMID:7844846

Halstead, S B

1994-12-01

314

Transition state structures in solution  

NASA Astrophysics Data System (ADS)

In the present paper the location of transition state structures for reactions in solution has been studied. Continuum model calculations have been carried out on the Friedel-Crafts alkylation reaction and a proton transfer through a water molecule between two oxygen atoms in formic acid. In this model the separation between the chemical system and the solvent has been introduced. On the other hand, the discrete Monte Carlo methodology has also been used to simulate the solvent effect on dissociative electron transfer processes. In this model, the hypothesis of separability is not assumed. Finally, the validity of both approaches is discussed.

Bertrán, J.; Lluch, J. M.; Gonzàlez-Lafont, A.; Dillet, V.; Pérez, V.

1995-04-01

315

Transition state structures in solution  

SciTech Connect

In the present paper the location of transition state structures for reactions in solution has been studied. Continuum model calculations have been carried out on the Friedel-Crafts alkylation reaction and a proton transfer through a water molecule between two oxygen atoms in formic acid. In this model the separation between the chemical system and the solvent has been introduced. On the other hand, the discrete Monte Carlo methodology has also been used to simulate the solvent effect on dissociative electron transfer processes. In this model, the hypothesis of separability is not assumed. Finally, the validity of both approaches is discussed.

Bertran, J.; Lluch, J. M.; Gonzalez-Lafont, A.; Dillet, V.; Perez, V. [Unitat de Quimica Fisica, Departament de Quimica. Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona (Spain)

1995-04-05

316

Approximating Metal-Insulator Transitions  

E-print Network

We consider quantum wave propagation in one-dimensional quasiperiodic lattices. We propose an iterative construction of quasiperiodic potentials from sequences of potentials with increasing spatial period. At each finite iteration step the eigenstates reflect the properties of the limiting quasiperiodic potential properties up to a controlled maximum system size. We then observe approximate metal-insulator transitions (MIT) at the finite iteration steps. We also report evidence on mobility edges which are at variance to the celebrated Aubry-Andre model. The dynamics near the MIT shows a critical slowing down of the ballistic group velocity in the metallic phase similar to the divergence of the localization length in the insulating phase.

C. Danieli; K. Rayanov; B. Pavlov; G. Martin; S. Flach

2014-05-06

317

Transitions between de Sitter minima  

NASA Astrophysics Data System (ADS)

We investigate the cosmological signatures of instantons mediating tunneling between de Sitter minima. For generic potentials the Coleman-de Luccia instanton does not necessarily exist; when it does not, the instanton which contributes to the decay rate is the trivial constant solution, known as the Hawking-Moss instanton. With the aid of a toy model we interpret this solution and describe the resulting cosmology. In neither the Coleman-de Luccia nor Hawking-Moss case can the resulting cosmology be closed. An observation of significant positive curvature would therefore rule out the possibility that our universe arose from any transition from a neighboring minimum in the string-theory landscape.

Batra, Puneet; Kleban, Matthew

2007-11-01

318

The Amazon basin in transition.  

PubMed

Agricultural expansion and climate variability have become important agents of disturbance in the Amazon basin. Recent studies have demonstrated considerable resilience of Amazonian forests to moderate annual drought, but they also show that interactions between deforestation, fire and drought potentially lead to losses of carbon storage and changes in regional precipitation patterns and river discharge. Although the basin-wide impacts of land use and drought may not yet surpass the magnitude of natural variability of hydrologic and biogeochemical cycles, there are some signs of a transition to a disturbance-dominated regime. These signs include changing energy and water cycles in the southern and eastern portions of the Amazon basin. PMID:22258611

Davidson, Eric A; de Araújo, Alessandro C; Artaxo, Paulo; Balch, Jennifer K; Brown, I Foster; C Bustamante, Mercedes M; Coe, Michael T; DeFries, Ruth S; Keller, Michael; Longo, Marcos; Munger, J William; Schroeder, Wilfrid; Soares-Filho, Britaldo S; Souza, Carlos M; Wofsy, Steven C

2012-01-19

319

Low floor mass transit vehicle  

DOEpatents

A mass transit vehicle includes a frame structure that provides an efficient and economical approach to providing a low floor bus. The inventive frame includes a stiff roof panel and a stiff floor panel. A plurality of generally vertical pillars extend between the roof and floor panels. A unique bracket arrangement is disclosed for connecting the pillars to the panels. Side panels are secured to the pillars and carry the shear stresses on the frame. A unique seating assembly that can be advantageously incorporated into the vehicle taking advantage of the load distributing features of the inventive frame is also disclosed.

Emmons, J. Bruce (Beverly Hills, MI); Blessing, Leonard J. (Rochester, MI)

2004-02-03

320

TRANSITIONS Transitions are words, phrases, or clauses that indicate a gradual change from one idea or topic to  

E-print Network

carefully considering transitions, ideas may be disconnected and potentially confuse the reader. When usedTRANSITIONS ___________________________________________________________________________ Transitions are words, phrases, or clauses that indicate a gradual change from one idea or topic to another. Transitions

Boonstra, Rudy

321

Stellar Transits in Active Galactic Nuclei  

NASA Astrophysics Data System (ADS)

Supermassive black holes (SMBHs) are typically surrounded by a dense stellar population in galactic nuclei. Stars crossing the line of site in active galactic nuclei (AGNs) produce a characteristic transit light curve, just like extrasolar planets do when they transit their host star. We examine the possibility of finding such AGN transits in deep optical, UV, and X-ray surveys. We calculate transit light curves using the Novikov-Thorne thin accretion disk model, including general relativistic effects. Based on the expected properties of stellar cusps, we find that around 106 solar mass SMBHs, transits of red giants are most common for stars on close orbits with transit durations of a few weeks and orbital periods of a few years. We find that detecting AGN transits requires repeated observations of thousands of low-mass AGNs to 1% photometric accuracy in optical, or ~10% in UV bands or soft X-ray. It may be possible to identify stellar transits in the Pan-STARRS and LSST optical and the eROSITA X-ray surveys. Such observations could be used to constrain black hole mass, spin, inclination, and accretion rate. Transit rates and durations could give valuable information on the circumnuclear stellar clusters as well. Transit light curves could be used to image accretion disks with unprecedented resolution, allowing us to resolve the SMBH silhouette in distant AGNs.

Béky, Bence; Kocsis, Bence

2013-01-01

322

STELLAR TRANSITS IN ACTIVE GALACTIC NUCLEI  

SciTech Connect

Supermassive black holes (SMBHs) are typically surrounded by a dense stellar population in galactic nuclei. Stars crossing the line of site in active galactic nuclei (AGNs) produce a characteristic transit light curve, just like extrasolar planets do when they transit their host star. We examine the possibility of finding such AGN transits in deep optical, UV, and X-ray surveys. We calculate transit light curves using the Novikov-Thorne thin accretion disk model, including general relativistic effects. Based on the expected properties of stellar cusps, we find that around 10{sup 6} solar mass SMBHs, transits of red giants are most common for stars on close orbits with transit durations of a few weeks and orbital periods of a few years. We find that detecting AGN transits requires repeated observations of thousands of low-mass AGNs to 1% photometric accuracy in optical, or {approx}10% in UV bands or soft X-ray. It may be possible to identify stellar transits in the Pan-STARRS and LSST optical and the eROSITA X-ray surveys. Such observations could be used to constrain black hole mass, spin, inclination, and accretion rate. Transit rates and durations could give valuable information on the circumnuclear stellar clusters as well. Transit light curves could be used to image accretion disks with unprecedented resolution, allowing us to resolve the SMBH silhouette in distant AGNs.

Beky, Bence [Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138 (United States)] [Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138 (United States); Kocsis, Bence, E-mail: bbeky@cfa.harvard.edu, E-mail: bkocsis@cfa.harvard.edu

2013-01-01

323

Dynamic transition in supercritical iron  

NASA Astrophysics Data System (ADS)

Recent advance in understanding the supercritical state posits the existence of a new line above the critical point separating two physically distinct states of matter: rigid liquid and non-rigid gas-like fluid. The location of this line, the Frenkel line, remains unknown for important real systems. Here, we map the Frenkel line on the phase diagram of supercritical iron using molecular dynamics simulations. On the basis of our data, we propose a general recipe to locate the Frenkel line for any system, the recipe that importantly does not involve system-specific detailed calculations and relies on the knowledge of the melting line only. We further discuss the relationship between the Frenkel line and the metal-insulator transition in supercritical liquid metals. Our results enable predicting the state of supercritical iron in several conditions of interest. In particular, we predict that liquid iron in the Jupiter core is in the ``rigid liquid'' state and is highly conducting. We finally analyse the evolution of iron conductivity in the core of smaller planets such as Earth and Venus as well as exoplanets: as planets cool off, the supercritical core undergoes the transition to the rigid-liquid conducting state at the Frenkel line.

Fomin, Yu. D.; Ryzhov, V. N.; Tsiok, E. N.; Brazhkin, V. V.; Trachenko, K.

2014-11-01

324

Dynamic transition in supercritical iron  

PubMed Central

Recent advance in understanding the supercritical state posits the existence of a new line above the critical point separating two physically distinct states of matter: rigid liquid and non-rigid gas-like fluid. The location of this line, the Frenkel line, remains unknown for important real systems. Here, we map the Frenkel line on the phase diagram of supercritical iron using molecular dynamics simulations. On the basis of our data, we propose a general recipe to locate the Frenkel line for any system, the recipe that importantly does not involve system-specific detailed calculations and relies on the knowledge of the melting line only. We further discuss the relationship between the Frenkel line and the metal-insulator transition in supercritical liquid metals. Our results enable predicting the state of supercritical iron in several conditions of interest. In particular, we predict that liquid iron in the Jupiter core is in the “rigid liquid” state and is highly conducting. We finally analyse the evolution of iron conductivity in the core of smaller planets such as Earth and Venus as well as exoplanets: as planets cool off, the supercritical core undergoes the transition to the rigid-liquid conducting state at the Frenkel line. PMID:25424664

Fomin, Yu. D.; Ryzhov, V. N.; Tsiok, E. N.; Brazhkin, V. V.; Trachenko, K.

2014-01-01

325

Nutrition transition and food sustainability.  

PubMed

The aim of the present paper is to review nutrition transition (NT) ongoing in low and middle income countries and the associated dietary changes. NT is accompanied by demographic and epidemiological transition associated with economic development and urbanisation. In these countries, while the problems of hunger and undernourishment persist, there is an escalation of diet-related non-communicable diseases; making them face both problems of malnutrition, under and overnutrition. Indeed, in addition to protein energy malnutrition underweight and micronutrient deficiencies affect a high proportion of children and women. Conversely, changes in dietary habits and physical activity patterns have led to emergence of chronic diseases such as obesity, diabetes, hypertension, stroke, hyperlipidaemia, CHD and cancer. One possible explanation of weight gain and its associated health consequences is the trend of the consumption of already prepared meals and the restaurants that are in continuous development leading to high consumption of foods rich in sugar and fat. The health problems associated with NT have not spared populations in the Mediterranean area where the type of diet is reported to be healthy and to protect against cardiovascular risks. This is seen in North Africa that belongs also to the Mediterranean basin, where the nutritional situation raises the problem of traditional foods sustainability. Accurate nutritional policy and education are needed to redress the effects of malnutrition related to NT on health. PMID:24824339

Belahsen, Rekia

2014-08-01

326

Gd Transition Probabilities and Abundances  

E-print Network

Radiative lifetimes, accurate to +/- 5%, have been measured for 49 even-parity and 14 odd-parity levels of Gd II using laser-induced fluorescence. The lifetimes are combined with branching fractions measured using Fourier transform spectrometry to determine transition probabilities for 611 lines of Gd II. This work is the largest-scale laboratory study to date of Gd II transition probabilities and the first using a high performance Fourier transform spectrometer. This improved data set has been used to determine a new solar photospheric Gd abundance, log epsilon = 1.11 +/- 0.03. Revised Gd abundances have also been derived for the r-process-rich metal-poor giant stars CS 22892-052, BD+17 3248, and HD 115444. The resulting Gd/Eu abundance ratios are in very good agreement with the solar-system r-process ratio. We have employed the increasingly accurate stellar abundance determinations, resulting in large part from the more precise laboratory atomic data, to predict directly the Solar System r-process elemental abundances for Gd, Sm, Ho and Nd. Our analysis of the stellar data suggests slightly higher recommended values for the r-process contribution and total Solar System values, consistent with the photospheric determinations, for the elements for Gd, Sm, and Ho.

E. A. Den Hartog; J. E. Lawler; C. Sneden; J. J. Cowan

2006-09-18

327

Buckling transition in long ?-helices  

NASA Astrophysics Data System (ADS)

The treatment of bending and buckling of stiff biopolymer filaments by the popular worm-like chain model does not provide adequate understanding of these processes at the microscopic level. Thus, we have used the atomistic molecular-dynamic simulations and the Amber03 force field to examine the compression buckling of ?-helix (AH) filaments at room temperature. It was found that the buckling instability occurs in AHs at the critical force fc in the range of tens of pN depending on the AH length. The decrease of the force fc with the contour length follows the prediction of the classic thin rod theory. At the force fc the helical filament undergoes the swift and irreversible transition from the smoothly bent structure to the buckled one. A sharp kink in the AH contour arises at the transition, accompanied by the disruption of the hydrogen bonds in its vicinity. The kink defect brings in an effective softening of the AH molecule at buckling. Nonbonded interactions between helical branches drive the rearrangement of a kinked AH into the ultimate buckled structure of a compact helical hairpin described earlier in the literature.

Palen?ár, Peter; Bleha, Tomáš

2014-11-01

328

Buckling transition in long ?-helices.  

PubMed

The treatment of bending and buckling of stiff biopolymer filaments by the popular worm-like chain model does not provide adequate understanding of these processes at the microscopic level. Thus, we have used the atomistic molecular-dynamic simulations and the Amber03 force field to examine the compression buckling of ?-helix (AH) filaments at room temperature. It was found that the buckling instability occurs in AHs at the critical force f(c) in the range of tens of pN depending on the AH length. The decrease of the force f(c) with the contour length follows the prediction of the classic thin rod theory. At the force f(c) the helical filament undergoes the swift and irreversible transition from the smoothly bent structure to the buckled one. A sharp kink in the AH contour arises at the transition, accompanied by the disruption of the hydrogen bonds in its vicinity. The kink defect brings in an effective softening of the AH molecule at buckling. Nonbonded interactions between helical branches drive the rearrangement of a kinked AH into the ultimate buckled structure of a compact helical hairpin described earlier in the literature. PMID:25381541

Palen?ár, Peter; Bleha, Tomáš

2014-11-01

329

Texas A&M Transportation Institute | 2012 Page | 1 Seven transit providers in the Central Puget Sound region came together to develop the ORCA fare card system.  

E-print Network

Texas A&M Transportation Institute | 2012 Page | 1 ORCA SUMMARY Seven transit providers Community Transit, Everett Transit, King County Metro, Kitsap Transit, Pierce Transit, Sound Transit Transit, Everett Transit, King County Metro, Kitsap Transit, Pierce Transit, Sound Transit

330

Transit Detection of Radial Velocity Planets  

E-print Network

The orbital parameters of extra-solar planets have a significant impact on the probability that the planet will transit the host star. This was recently demonstrated by the transit detection of HD 17156b whose favourable eccentricity and argument of periastron dramatically increased its transit likelihood. We present a study which provides a quantitative analysis of how these two orbital parameters effect the geometric transit probability as a function of period. Further, we apply these results to known radial velocity planets and show that there are unexpectedly high transit probabilities for planets at relatively long periods. For a photometric monitoring campaign which aims to determine if the planet indeed transits, we calculate the significance of a null result and the subsequent constraints that may be applied to orbital parameters.

Stephen R. Kane; Kaspar von Braun

2008-06-30

331

More holographic Berezinskii-Kosterlitz-Thouless transitions  

SciTech Connect

We find two systems via holography that exhibit quantum Berezinskii-Kosterlitz-Thouless (BKT) phase transitions. The first is the ABJM theory with flavor and the second is a flavored (1, 1) little string theory. In each case the transition occurs at nonzero density and magnetic field. The BKT transition in the little string theory is the first example of a quantum BKT transition in (3+1) dimensions. As in the 'original' holographic BKT transition in the D3/D5 system, the exponential scaling is destroyed at any nonzero temperature and the transition becomes second order. Along the way we construct holographic renormalization for probe branes in the ABJM theory and propose a scheme for the little string theory. Finally, we obtain the embeddings and (half of) the meson spectrum in the ABJM theory with massive flavor.

Jensen, Kristan [Department of Physics, University of Washington, Seattle, Washington 98195-1560 (United States)

2010-08-15

332

Continuous and discontinuous metal-insulator transitions  

Microsoft Academic Search

In non-crystalline systems a continuous metal-insulator transition of Andersontype is frequently observed when the Fermi energy moves through a mobility edge. In crystalline systems, on the other hand, the activation energy for conduction should change discontinuously at the transition. The aim of this paper is to enquire under what conditions a discontinuous transition can occur in non-crystalline systems. It clearly

N. F. Mott

1978-01-01

333

Diamagnetic phase transition by helicon resonance  

NASA Astrophysics Data System (ADS)

The onset of the diamagnetic phase transition in aluminum is shown by analyzing the temperature dependence of the helicon resonance frequency and damping and by comparing between the theory and the experiment. Softening of the helicon mode due to the domain appearance is calculated. The critical growth of the helicon damping is connected with the phase transition nature of the domain occurrence, i.e. with the critical dynamics of diamagnetic phase transitions related to critical slowing down of the electron relaxation time.

Gordon, A.; Joss, W.; Logoboy, N.; Vagner, I. D.

2003-09-01

334

Intensity Distribution of the Solar Transition Region  

NASA Technical Reports Server (NTRS)

The objective of this research project was to use high resolution spectroscopic observations from the SUMER instrument on SOHO to study the structure of the solar transition region. Our focus in this grant was to study the structure of the transition region in a small active region, and compare it to similar observations we made of the quiet Sun. We also used SXT and EIT data to constrain the coronal and transition region emission measure distribution.

Fisher, George H.

1999-01-01

335

Analysis of Nuclear Quantum Phase Transitions  

SciTech Connect

A microscopic analysis, based on nuclear energy density functionals, is presented for shape phase transitions in Nd isotopes. Low-lying excitation spectra and transition probabilities are calculated starting from a five-dimensional Hamiltonian, with parameters determined by constrained relativistic mean-field calculations for triaxial shapes. The results reproduce available data, and show that there is an abrupt change of structure at N = 90, that corresponds to a first-order quantum phase transition between spherical and axially deformed shapes.

Li, Z. P.; Meng, J. [State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871 (China); Niksic, T.; Vretenar, D. [Physics Department, Faculty of Science, University of Zagreb (Croatia); Lalazissis, G. A. [Department of Theoretical Physics, Aristotle University of Thessaloniki, GR-54124 (Greece); Ring, P. [Physik-Department der Technischen Universitaet Muenchen, D-85748 Garching (Germany)

2009-08-26

336

Mass Transit Living Lab: Improve the System  

NSDL National Science Digital Library

Students go through the process of identifying possible solutions to the design problems that the existing west corridor transit system faces. Students combine what they have learned from the three previous activities to come up with possible solutions to the design problems faced by the system. This activity requires the use of the Mass Transit Living Labâa web portal to interactive train (transit) traffic data for a major metropolitan city.

Civil And Environmental Engineering Department

337

Magnetic topological transition in transmission line metamaterials  

NASA Astrophysics Data System (ADS)

We study the magnetic topological transition of the isofrequency curves in the wave vector space from a closed ellipsoid to an open hyperboloid in a metamaterial based on artificial transmission lines. In the radio frequency band we directly measure the emission pattern of a point source placed in the center of the lattice and demonstrate the elliptical wave fronts below the topological transition frequency and hyperbolic wave fronts above the topological transition frequency.

Shchelokova, Alena V.; Filonov, Dmitry S.; Kapitanova, Polina V.; Belov, Pavel A.

2014-09-01

338

New O(3) transition in three dimensions  

NASA Astrophysics Data System (ADS)

A three-dimensional lattice of Heisenberg spins with nearest-neighbor interactions is studied by numerical simulation under the constraint that no free topological singularities (hedgehogs) are allowed. Only nearest-neighbor pairs of oppositely charged hedgehogs are permitted in the sum over configurations. A disordering transition with exponents different from the usual Heisenberg transition is found and tentatively identified as a pure spin wave disordering transition.

Kamal, Michael; Murthy, Ganpathy

1993-09-01

339

42 CFR 412.426 - Transition period.  

Code of Federal Regulations, 2012 CFR

... PROSPECTIVE PAYMENT SYSTEMS FOR INPATIENT HOSPITAL SERVICES Prospective Payment System for Inpatient Hospital...the blended transition payment. Except as provided... (c) Treatment of new inpatient...

2012-10-01

340

42 CFR 412.426 - Transition period.  

Code of Federal Regulations, 2010 CFR

... PROSPECTIVE PAYMENT SYSTEMS FOR INPATIENT HOSPITAL SERVICES Prospective Payment System for Inpatient Hospital...the blended transition payment. Except as provided... (c) Treatment of new inpatient...

2010-10-01

341

42 CFR 412.426 - Transition period.  

Code of Federal Regulations, 2013 CFR

... PROSPECTIVE PAYMENT SYSTEMS FOR INPATIENT HOSPITAL SERVICES Prospective Payment System for Inpatient Hospital...the blended transition payment. Except as provided... (c) Treatment of new inpatient...

2013-10-01

342

42 CFR 412.426 - Transition period.  

Code of Federal Regulations, 2011 CFR

... PROSPECTIVE PAYMENT SYSTEMS FOR INPATIENT HOSPITAL SERVICES Prospective Payment System for Inpatient Hospital...the blended transition payment. Except as provided... (c) Treatment of new inpatient...

2011-10-01

343

42 CFR 412.426 - Transition period.  

... PROSPECTIVE PAYMENT SYSTEMS FOR INPATIENT HOSPITAL SERVICES Prospective Payment System for Inpatient Hospital...the blended transition payment. Except as provided... (c) Treatment of new inpatient...

2014-10-01

344

On critical anomalies at diamagnetic phase transitions  

NASA Astrophysics Data System (ADS)

Calculations of the thermal expansion coefficient and magnetic field susceptibility jumps at second-order diamagnetic phase transitions are performed. The temperature and size dependence of the susceptibility, of the thermal expansion coefficient and of the sound velocity is presented near the diamagnetic phase transition. The compressibility growth observed in beryllium and occurring as a result of the Condon domain formation confirms indirectly the presence of a thermal expansion jump at the phase transition point. A possibility of a first-order diamagnetic phase transition occurrence is considered as a result of the magneto-elastic coupling.

Gordon, A.; Wyder, P.

2002-11-01

345

Dynamics of stimulated L ? H transitions  

SciTech Connect

We report on model studies of stimulated L ? H transitions [K. Miki et al., Phys. Rev. Lett. 110, 195002 (2013)]. These studies use a reduced mesoscale model. Model studies reveal that L ? H transition can be triggered by particle injection into a subcritical state (i.e., Ptransition. For low ambient heating, strong injection is predicted to trigger a transient turbulence collapse. Repetitive injection at a period less than the lifetime of the collapsed state can thus maintain the turbulence collapse and so sustain a driven H-mode-like state. The total number of particles required to induce a transition by either injection or gas puffing is estimated. Results indicate that the total number of injected particles required is much smaller than that required for a transition by gas puffing. We thus show that internal injection is more efficient than gas puffing of comparable strength. We also observe that zonal flows do not play a critical role in stimulated transitions. For spontaneous transitions, the spike of the Reynolds work of turbulence on the zonal flow precedes the spike in the mean electric field shear. In contrast, we show that the two are coincident for stimulated transitions, suggesting that there is no causal link between zonal and mean flows for stimulated transitions.

Miki, K. [WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of) [WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of); Center for Computational Science and e-Systems, Japan Atomic Energy Agency, Chiba 277-8587 (Japan); Diamond, P. H.; Xiao, W. W. [WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of) [WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of); Center for Momentum Transport and Flow Organization, University of California, San Diego, California 92093 (United States); Hahn, S.-H. [KSTAR Team, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of)] [KSTAR Team, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of); Gürcan, Ö. D. [LPP, Ecole Polytechnique, CNRS, 92118 Palaiseau Cedex (France)] [LPP, Ecole Polytechnique, CNRS, 92118 Palaiseau Cedex (France); Tynan, G. R. [Center for Momentum Transport and Flow Organization, University of California, San Diego, California 92093 (United States)] [Center for Momentum Transport and Flow Organization, University of California, San Diego, California 92093 (United States)

2013-08-15

346

Continuous, Multielement, Hot-Film Transition Gage  

NASA Technical Reports Server (NTRS)

Accurate measurement of location where laminar boundary layer undergoes transition to turbulent one serves many purposes in basic aero-dynamic research and developmental testing. Individual gages must be staggered to prevent formation of turbulence at gages downstream. This arrangement precludes accurate measurements of laminar/turbulent transition regions along streamline. Complete understanding of performance, stability, and control of laminar-flow airplane requires knowledge of transition locations on wing surface, empennage surfaces, fuselage, and nacelles. Visual, acoustic, and electronic methods capable of providing this transition information.

Holmes, B.; Mcpherson, J.; Harris, F.; Diamond, J.; Johnson, N.; Chapman, J.

1986-01-01

347

Explosive Percolation Transition is Actually Continuous  

NASA Astrophysics Data System (ADS)

Recently a discontinuous percolation transition was reported in a new “explosive percolation” problem for irreversible systems [D. Achlioptas, R. M. D’Souza, and J. Spencer, Science 323, 1453 (2009)SCIEAS0036-807510.1126/science.1167782] in striking contrast to ordinary percolation. We consider a representative model which shows that the explosive percolation transition is actually a continuous, second order phase transition though with a uniquely small critical exponent of the percolation cluster size. We describe the unusual scaling properties of this transition and find its critical exponents and dimensions.

da Costa, R. A.; Dorogovtsev, S. N.; Goltsev, A. V.; Mendes, J. F. F.

2010-12-01

348

Aspects of the non-zonal transition  

SciTech Connect

The non-zonal transition, a process which can bring about very large heat fluxes in gyrokinetic simulations, occurs once a certain threshold plasma ? is reached. This threshold is parameterized via a simulation database, yielding an expression estimating at what ? a given system may approach the transition. Furthermore, the diffusive outward transport of a heat blob in a temperature profile marginally stable with respect to the non-zonal transition is discussed: the resulting transport timescale combines the underlying turbulent transport timescale and the linear instability growth time, thus demonstrating that the non-zonal transition provides a mechanism for very fast heat dissipation.

Pueschel, M. J.; Terry, P. W. [Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)] [Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States); Hatch, D. R. [Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712 (United States)] [Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712 (United States)

2014-05-15

349

SUCCESSFUL TRANSITION Counseling & Substance Abuse Services  

E-print Network

SUCCESSFUL TRANSITION TO COLLEGE Counseling & Substance Abuse Services Director, Frank Budd, Ph and Substance Abuse Services · Undergraduate Academic Services · Dean of Students · Their Professor during

Kunkle, Tom

350

Transition manager is liaison between teams.  

PubMed

At University of Utah Health Care, a transition case manager acts as a liaison between the outpatient care team at community clinics and the inpatient care team. The transition navigator works with case managers at the hospital and the clinics to make sure both have the information they need to coordinate care for the patient. The transition navigator visits patients in the hospital and works with the unit case manager to make sure the discharge plan will work. To further smooth transitions, the patients receive a one-page sheet that summarizes their discharge instructions, follow-up appointments, and medication regimen. PMID:25065104

2014-08-01

351

Hot electron injection driven phase transitions  

NASA Astrophysics Data System (ADS)

We report on a general mechanism for photo-induced phase transitions. The process relies on the photo-injection of hot electrons from an adjacent metallic layer to trigger the structural dynamics of the materials of interest. This mechanism is demonstrated for the semiconductor-to-metal phase transition of VO2 using a 20 nm Au injection layer. The nature of the phase transition is demonstrated by time-resolved optical transmission measurements, as well as a well defined bias dependence that illustrates that the Au film is the source of nonequilibrium electrons driving the phase transition.

Hada, Masaki; Zhang, Dongfang; Casandruc, Albert; Miller, R. J. Dwayne; Hontani, Yusaku; Matsuo, Jiro; Marvel, Robert E.; Haglund, Richard F., Jr.

2012-10-01

352

Negative refraction using Raman transitions and chirality  

SciTech Connect

We present a scheme that achieves negative refraction with low absorption in far-off resonant atomic systems. The scheme utilizes Raman resonances and does not require the simultaneous presence of an electric-dipole transition and a magnetic-dipole transition near the same wavelength. We show that two interfering Raman tran-sitions coupled to a magnetic-dipole transition can achieve a negative index of refraction with low absorption through magnetoelectric cross-coupling. We confirm the validity of the analytical results with exact numerical simulations of the density matrix. We also discuss possible experimental implementations of the scheme in rare-earth metal atomic systems.

Sikes, D. E.; Yavuz, D. D. [Department of Physics, 1150 University Avenue, University of Wisconsin at Madison, Madison, Wisconsin 53706 (United States)

2011-11-15

353

Electronic transition of palladium monoboride.  

PubMed

The laser-induced fluorescence spectrum of palladium monoboride (PdB) in the visible region between 465 and 520 nm has been observed and analyzed. Gas-phase PdB molecules were produced by the reaction of diborane (B(2)H(6)) seeded in argon with laser ablated palladium atoms. Thirteen vibrational bands have been recorded, which included transitions of both Pd(10)B and Pd(11)B isotopic species. These bands belong to the [19.7](2)?(+)-X(2)?(+) system, with ground X(2)?(+) state bond length, r(o), determined to be 1.7278 Å. A molecular orbital energy level diagram was used to understand the observed ground and excited electronic states. This work represents the first experimental investigation of the electronic spectroscopy of the PdB molecule. PMID:23121077

Ng, Y W; Pang, H F; Qian, Yue; Cheung, A S-C

2012-11-29

354

PUREX transition project case study  

SciTech Connect

In December 1992, the US Department of Energy (DOE) directed that the Plutonium-Uranium Extraction (PUREX) Plant be shut down and deactivated because it was no longer needed to support the nation`s production of weapons-grade plutonium. The PUREX/UO{sub 2} Deactivation Project will establish a safe and environmentally secure configuration for the facility and preserve that configuration for 10 years. The 10-year span is used to predict future maintenance requirements and represents the estimated time needed to define, authorize, and initiate the follow-on decontamination and decommissioning activities. Accomplishing the deactivation project involves many activities. Removing major hazards, such as excess chemicals, spent fuel, and residual plutonium are major goals of the project. The scope of the PUREX Transition Project is described within.

Jasen, W.G.

1996-04-15

355

Complexity in Transition Metal Oxides  

NASA Astrophysics Data System (ADS)

Recent computational results in the context of models for manganites and cuprates will be briefly discussed. It is argued that correlations in quenched disorder -- needed to mimic cooperative Jahn-Teller effects -- are important to have colossal magnetoresistance in 3D. A related recently discussed metal-insulator transition induced by disorder in a one-orbital model with cooperative phonons is intuitively explained [1]. In addition, it is argued that colossal effects should be far more common than currently known, and they may appear in cuprate superconductors as well [2]. [1] J. Burgy et al., cond-mat/0308456; C. Sen, G. Alvarez, and E. Dagotto, preprint. [2] See also Adriana Moreo, invited talk, March APS 04; G. Alvarez, M. Mayr et al., preprint.

Dagotto, Elbio; Alvarez, Gonzalo; Moreo, Adriana

2004-03-01

356

Transition to turbulence in ferrofluids  

E-print Network

It is known that in classical fluids turbulence typically occurs at high Reynolds numbers. But can turbulence occur at low Reynolds numbers? Here we investigate the transition to turbulence in the classic Taylor-Couette system in which the rotating fluids are manufactured ferrofluids with magnetized nanoparticles embedded in liquid carriers. We find that, in the presence of a magnetic field turbulence can occur at Reynolds numbers that are at least one order of magnitude smaller than those in conventional fluids. This is established by extensive computational ferrohydrodynamics through a detailed bifurcation analysis and characterization of behaviors of physical quantities such as the energy, the wave number, and the angular momentum through the bifurcations. A striking finding is that, as the magnetic field is increased, the onset of turbulence can be determined accurately and reliably. Our results imply that experimental investigation of turbulence can be greatly facilitated by using ferrofluids, opening up...

Altmeyer, Sebastian; Lai, Ying-Cheng

2015-01-01

357

Transitional ? strength in Cd isotopes  

NASA Astrophysics Data System (ADS)

The level densities and ?-ray strength functions of 105,106,111,112Cd have been extracted from particle-? coincidence data using the Oslo method. The level densities are in very good agreement with known levels at low excitation energy. The ?-ray strength functions display no strong enhancement for low ? energies. However, more low-energy strength is apparent for 105,106Cd than for 111,112Cd. For ? energies above ?4 MeV, there is evidence for some extra strength, similar to what has been previously observed for the Sn isotopes. The origin of this extra strength is unclear; it might be due to E1 and M1 transitions originating from neutron skin oscillations or the spin-flip resonance, respectively.

Larsen, A. C.; Ruud, I. E.; Bürger, A.; Goriely, S.; Guttormsen, M.; Görgen, A.; Hagen, T. W.; Harissopulos, S.; Nyhus, H. T.; Renstrøm, T.; Schiller, A.; Siem, S.; Tveten, G. M.; Voinov, A.; Wiedeking, M.

2013-01-01

358

Synthesis of transition metal carbonitrides  

DOEpatents

Transition metal carbonitrides (in particular, titanium carbonitride, TiC.sub.0.5 N.sub.0.5) are synthesized by a self-propagating reaction between the metal (e.g., titanium) and carbon in a nitrogen atmosphere. Complete conversion to the carbonitride phase is achieved with the addition of TiN as diluent and with a nitrogen pressure .gtoreq.0.6 MPa. Thermodynamic phase-stability calculations and experimental characterizations of quenched samples provided revealed that the mechanism of formation of the carbonitride is a two-step process. The first step involves the formation of the nonstoichiometric carbide, TiC.sub.0.5, and is followed by the formation of the product by the incorporation of nitrogen in the defect-structure carbide.

Munir, Zuhair A. R. (Davis, CA); Eslamloo-Grami, Maryam (Davis, CA)

1994-01-01

359

Chicago Transit Authority: Public Art  

NSDL National Science Digital Library

The Chicago Transit Authority (CTA) has long had an ambitious public art program. This handy 62-page guidebook provides interested parties and tourists with a complete listing of these works. Not surprisingly, the works are arranged by elevated line and by stop. The guide starts with providing information about works on the Brown Line, which is a great place to begin. It's a real treat to start with Josh Garber's "Hope and Renewal" which is located at the Kimball stop at the end of the Brown Line in the Albany Park community. Also, baseball fans won't want to miss the artworks located close to the train stations at Wrigley Field and US Cellular Field. The guide also includes an artist index and information about the gorgeous works at CTA headquarters in the city's Near West Side neighborhood.

360

Hf Transition Probabilities and Abundances  

E-print Network

Radiative lifetimes from laser-induced fluorescence measurements, accurate to about +/- 5 percent, are reported for 41 odd-parity levels of Hf II. The lifetimes are combined with branching fractions measured using Fourier transform spectrometry to determine transition probabilities for 150 lines of Hf II. Approximately half of these new transition probabilities overlap with recent independent measurements using a similar approach. The two sets of measurements are found to be in good agreement for measurements in common. Our new laboratory data are applied to refine the hafnium photospheric solar abundance and to determine hafnium abundances in 10 metal-poor giant stars with enhanced r-process abundances. For the Sun we derive log epsilon (Hf) = 0.88 +/- 0.08 from four lines; the uncertainty is dominated by the weakness of the lines and their blending by other spectral features. Within the uncertainties of our analysis, the r-process-rich stars possess constant Hf/La and Hf/Eu abundance ratios, log epsilon (Hf/La) = -0.13 +/- 0.02 (sigma = 0.06) and log epsilon (Hf/Eu) = +0.04 +/- 0.02 (sigma = 0.06). The observed average stellar abundance ratio of Hf/Eu and La/Eu is larger than previous estimates of the solar system r-process-only value, suggesting a somewhat larger contribution from the r-process to the production of Hf and La. The newly determined Hf values could be employed as part of the chronometer pair, Th/Hf, to determine radioactive stellar ages.

J. E. Lawler; E. A. Den Hartog; Z. E. Labby; C. Sneden; J. J. Cowan; I. I. Ivans

2006-11-01

361

Phase Transitions on Quasicrystalline Surfaces.  

NASA Astrophysics Data System (ADS)

The sputtering of the surfaces of quasicrystals with Ar^+ changes their chemical composition by preferential removal of particular atomic species. At room temperature, this produces a phase transition at the surface of the icosahedral Al_70Pd_20Mn_10 to a cubic structure. Using secondary-electron imaging (SEI), which reveals the atomic symmetry of surfaces and shallow interfaces in real space, we have investigated the structural registry of the cubic surface layers grown on the pentagonal face of the quasicrystal. The bulk effectively acts as a thermodynamic and structural template for the quasicrystalline state. Annealing at 700 K restores the stoichiometry near the surface and the quasicrystalline structure is recovered. SEI helps us establish the relationship between the body-centered cubic and the quasicrystalline structures. Sputtering the same quasicrystal near 500 K shifts the chemical equilibrium at the surface in favor of a decagonal structure. This surface layer is structurally commensurate with the bulk pentagonal symmetry. Upon annealing, the chemical composition is recovered and the decagonal symmetry reverts back to pentagonal. Real time observations of this transition at elevated temperatures with SEI shows the structural coherence between the icosahedral and the decagonal quasicrystals. These studies have motivated a model for icosahedral quasicrystals: we start with an icosahedron as a seed and lay planes parallel to its faces. The atoms sit at the intersections of the planes. If the interplanar distances follow the Fibonacci sequence, the resulting solid successfully reproduces in quantum mechanical simulations the experimental secondary-electron patterns. Thus, this investigation reveals the long-range properties of Al_70Pd_20Mn_10.

Bolliger, Bernhard

2000-03-01

362

THE TRANSIT LIGHT CURVE PROJECT. X. A CHRISTMAS TRANSIT OF HD 17156b  

E-print Network

Photometry is presented of the 2007 December 25 transit of HD 17156b, which has the longest orbital period and highest orbital eccentricity of all the known transiting exoplanets. New measurements of the stellar radial ...

Winn, Joshua Nathan

363

[Application of the phase transition theory to the description of fibrinogen-fibrin transition].  

PubMed

A physical model of the kinetics of the fibrinogen--fibrin transition was constructed using the theory of phase transitions. It was shown that the model is consistent with the experimental data. PMID:12397949

Zabashta, Iu F; Levchuk, S S; Sokolovskaia, L I; Platonova, T N

2002-01-01

364

Cosmological Consequences of QCD Phase Transition(s) in Early Universe  

SciTech Connect

We discuss the cosmological consequences of QCD phase transition(s) on the early universe. We argue that our recent knowledge about the transport properties of quark-gluon plasma (QGP) should thraw additional lights on the actual time evolution of our universe. Understanding the nature of QCD phase transition(s), which can be studied in lattice gauge theory and verified in heavy ion experiments, provides an explanation for cosmological phenomenon stem from early universe.

Tawfik, A. [ECTP, Egyptian Center for Theoretical Physics, MTI Modern University, Mukattam Cairo (Egypt)

2009-04-17

365

Ellis-Monaghan & Sarmiento Page 1 of 1 Gen. Transition Polys. Generalized Transition Polynomials  

E-print Network

Ellis-Monaghan & Sarmiento Page 1 of 1 Gen. Transition Polys. Generalized Transition Polynomials Joanna A. Ellis-Monaghan Department of Mathematics and Statistics Saint Michael's College is a commutative ring with unit. #12;Ellis-Monaghan & Sarmiento Page 2 of 2 Gen. Transition Polys

Ellis-Monaghan, Joanna

366

Development of transit information assistant system for the visual impaired in a multimodal transit environment  

Microsoft Academic Search

The objectives of this paper were to identify the problems and requirements of the visual impaired in the transit environment by questionnaire survey and develop a transit information assistant system base on the APTS technology. The questionnaire includes forty items under six categories to understand the difficulties and requirements for of visual impaired in the transit environment. Regarding the investigation

Jau-Ming Su; Chih-Hung Chang; Wen-Chi Ho; Hong-Jen Liao

2010-01-01

367

Decreasing Transition Times in a Second Grade Classroom: Scientific Support for the Timely Transitions Game  

ERIC Educational Resources Information Center

Campbell and Skinner used an A-B design to evaluate the effects of the Timely Transitions Game (TTG) on room-to-room transitions in a sixth-grade classroom. The TTG incorporated explicit timing, publicly posted feedback, and an interdependent group contingency with randomly selected transitions and criteria. The purpose of the current study was to…

Yarrough, Jamie L.; Skinner, Christopher H.; Lee, Young Ju; Lemmons, Cathy

2004-01-01

368

Epithelial–mesenchymal transitions in tumour progression  

Microsoft Academic Search

Without epithelial–mesenchymal transitions, in which polarized epithelial cells are converted into motile cells, multicellular organisms would be incapable of getting past the blastula stage of embryonic development. However, this important developmental programme has a more sinister role in tumour progression. Epithelial–mesenchymal transition provides a new basis for understanding the progression of carcinoma towards dedifferentiated and more malignant states.

Jean Paul Thiery

2002-01-01

369

Quantum manipulation on the Barium quadrupolar transition  

E-print Network

Quantum manipulation on the Barium quadrupolar transition A diploma thesis in physics submitted and stabilization of a new fiber laser system to ma- nipulate the Barium quadrupolar transition, with the aim with a single Barium ion trapped in a linear Paul trap and Doppler cooled to the Lamb Dicke regime. The narrow

Blatt, Rainer

370

Stiffness transition in anisotropic fiber nets.  

PubMed

We demonstrate the existence of a percolationlike stiffness transition in fiber networks with a bidisperse orientation distribution and with fiber densities clearly above the geometrical and the ordinary stiffness transition. The fibers are oriented parallel and perpendicular to a strain direction and they have a large fiber aspect ratio. The stiffness K of the fiber nets can be described by a scaling relation, K [proportionally] ?(?) g[(? - ?(c))/?(-?)], where ? is the fraction of fibers parallel to strain. g is a scaling function that is roughly described by a power law g(x) [proportionally ] x(?) for stiffness above the transition and by a constant below the transition. The transition point is characterized by qualitative changes in the distribution of the elastic deformation energy of the fibers, the deformation mode of the fibers, the effective Poisson ratio of the nets, the distribution of elastic energy on fibers and cross links, and the ratio of elastic and viscous dissipation energy. This transition opens the possibility of extreme stiffness variations with minimal mesh manipulations in the vicinity of the transition (i.e., a stiffness gate). It is possible that this transition affects the mechanical behavior of the cytoskeleton in cells. PMID:23005800

Åström, J A; Sunil Kumar, P B; Karttunen, Mikko

2012-08-01

371

The Electroweak Phase Transition - Standard and ``Beyond''  

E-print Network

We first review why a strongly first-order phase transition needed for baryogenesis is excluded in the electroweak standard model. We also comment on some intriguing effects in the strongly interacting hot phase. In the MSSM with a light stop a strongly first-order phase transition can be achieved. It possibly proceeds in two stages.

Michael G. Schmidt

1997-08-12

372

Measuring transit performance using data envelopment analysis  

Microsoft Academic Search

Governmental agencies need to be able to assess the performance of transit agencies and to compare them with peer agencies. This assessment must measure not only how efficient the agency is in producing transit service, but also how effective it is in having that service consumed. This paper uses data envelopment analysis (DEA) to develop a single measure for the

Xuehao Chu; Gordon J. Fielding; Bruce W. Lamar

1992-01-01

373

Phase Transitions in Two-Dimensional Superconductors  

Microsoft Academic Search

In this thesis, we describe a number of experiments which are designed to explore the theoretically predicted phase transitions for two-dimensional superconductors. We first examine the behavior of a two-dimensional superconductor in the absence of a magnetic field, where the fluctuations in the phase of the superconducting order parameter results in the reduction of the superconducting transition temperature for a

Ali Yazdani

1995-01-01

374

Determinants of Enterprise Performance during Transition  

Microsoft Academic Search

This paper takes the form of a comparative study of the body of research upon enterprise performance and restructuring in established market economies and transition economies (TEs). We firstly examine issues related to empirical studies of enterprise performance and restructuring, including the influence of historical cost accounting, reverse causality, sample selection bias and transition specific factors. Subsequent analysis is sub-divided

Alan A. Bevan; Saul Estrin; Mark E. Schaffer

1999-01-01

375

Boolean Matrix Multiplication and Transitive Closure  

Microsoft Academic Search

Arithmetic operations on matrices are applied to the problem of finding the transitive closure of a Boolean matrix. The best transitive closure algorithm known, due to Munro, is based on the matrix multiplication method of Strassen. We show that his method requires at most O(n? ¿ P(n)) bitwise operations, where ? = log27 and P(n) bounds the number of bitwise

Michael J. Fischer; Albert R. Meyer

1971-01-01

376

Estimating the Size of Generalized Transitive Closures  

Microsoft Academic Search

We present a framework for the estimation of the size of binary recursively defined relations. We show how the framework can be used to provide estimating algo rithms for the size of the transitive closure and gener- alizations of the transitive closure, and also show that for bounded degree relations, the algorithm runs in linear time. Such estimating algorithms are

Richard J. Lipton; Jeffrey F. Naughton

1989-01-01

377

Transition Metal Dichalcogenides and Their Intercalates  

Microsoft Academic Search

The transition metal dichalcogenides form a group of layered, highly anisotropic compounds which exhibit interesting and unusual physical properties. Compounds formed from the Group Iv, Group V and Group VI transition metals and from sulphur or selenium have been the subject of a great deal of interest in the past few years because of the possibility of introducing foreign species

E. A. Marseglia

1983-01-01

378

Viability of Modern Automated Rapid Transit Applications  

E-print Network

to Personal Rapid Transit (PRT) Primary Features of ART: · Automation · Fast service · Transit advantage Comprehensive Mobility #12;Current and Planned ART/PRT Systems Heathrow Airport ULTra PRT (UK) · Initial stage/hour) #12;Current and Planned ART/PRT Systems Masdar City, Abu Dhabi, 2getthere System (Dutch) · Initial

Minnesota, University of

379

Income Distribution during the Transition in China  

Microsoft Academic Search

This paper's goal is to increase the understanding of the inequality trends during the transitional period in China. From 1978 to 1995, China has been undergoing 18 years far-reaching economic system reform and opening to the outside world nationwide. During the transitional periods, the average household income per capita increased substantially and so did income inequality.

Z. Ping

1997-01-01

380

PPT: The Preschool Preparation and Transition Project.  

ERIC Educational Resources Information Center

The University of Hawaii Department of Special Education conducted the Preschool Preparation and Transition Project, a federally funded demonstration program, to support families and their children with special needs in the transition from infant programs to least restrictive preschool placements. The program addressed this goal through three…

Noonan, Mary Jo; Ratokalau, Nancy B.

1992-01-01

381

Women in Cross-Cultural Transitions.  

ERIC Educational Resources Information Center

This series of 14 essays focuses on experiences of women who have made cross-cultural transitions. Cross-cultural transitions refer to moving across cultures, usually from one country to another or across subcultures within one society. The essays document what individual women perceived, how they felt when in the process of moving from one…

Bystydzienski, Jill M., Ed.; Resnik, Estelle P., Ed.

382

Computational experiences with some transitive closure algorithms  

Microsoft Academic Search

The paper contains results of computational experiences with the following algorithms for finding the transitive closure of a digraph: (i) Warshall's algorithm [17], (ii) Purdom's algorithm [13], (iii) the modification of Yen's algorithm [14], and (iv) the new algorithms for finding the transitive closure [3, 4]. The tested digraphs were generated at random. The enclosed references contain all papers known

Maciej M. Syslo; J. Dzikiewicz

1975-01-01

383

Effect of pregnancy on gastrointestinal transit  

Microsoft Academic Search

In order to evaluate the possible effects of pregnancy-associated sex steroids on gastrointestinal function, we determined gastrointestinal transit times and sex steroid levels in 15 women during the third trimester of their pregnancies and again 4–6 weeks following delivery when gastrointestinal function had symptomatically returned to normal. Gastrointestinal transit time from ingestion of a liquid lactulose meal to its delivery

Arnold Wald; David H. Van Thiel; Leah Hoechstetter; Judith S. Gavaler; Kimberly M. Egler; Ray Verm; Larry Scott; Roger Lester

1982-01-01

384

Building bridges: understanding student transition to university  

Microsoft Academic Search

This article explores challenges in ensuring effective student transition from school or college to university. It examines the complex liaison needed for students to progress to appropriate courses, settle into university life and succeed as higher education learners. Secondary data (international literature on transition and the formation of learner identity) are analysed to identify underpinning concepts. Primary data are taken

A. R. J. Briggs; J. Clark; I. Hall

2012-01-01

385

Energy Transition Initiative: Islands Playbook (Book)  

SciTech Connect

The Island Energy Playbook (the Playbook) provides an action-oriented guide to successfully initiating, planning, and completing a transition to an energy system that primarily relies on local resources to eliminate a dependence on one or two imported fuels. It is intended to serve as a readily available framework that any community can adapt to organize its own energy transition effort.

Not Available

2015-01-01

386

Transformative Learning in Managerial Role Transitions  

ERIC Educational Resources Information Center

The purpose of this study is to investigate the nature of learning in work role transitions from specialist roles to managerial roles in a context of a large international technology organisation. Prior theorisation of learning in role transitions has been based on quantitative, psychologically-oriented studies prescribing different role and…

Isopahkala-Bouret, Ulpukka

2008-01-01

387

Clinical and technological transition in breast cancer  

PubMed Central

This article is a summary of the conference “Clinical and technological transition in breast cancer” that took place in the Congress of the Spanish Society of Radiation Oncology, placed in Vigo (Spain) on June 21, 2013. Hugo Marsiglia and Philip Poortmanns were the speakers, the first discussed about “Clinical and technological transition” and the second about “EORTC clinical trials and protocols”. PMID:24416578

Poortmans, Philip; Marsiglia, Hugo; De las Heras, Manuel; Algara, Manuel

2013-01-01

388

Detecting Transits in Sparsely Sampled Surveys  

Microsoft Academic Search

The small sizes of low mass stars in principle provide an opportunity to find Earth-like planets and ``super Earths'' in habitable zones via transits. Large area synoptic surveys like Pan-STARRS and LSST will observe large numbers of low mass stars, albeit with widely spaced (sparse) time sampling relative to the planets' periods and transit durations. We present simple analytical equations

H. C. Ford; W. Bhatti; L. Hebb; L. Petro; M. Richmond; J. Rogers

2008-01-01

389

Cell Stem Cell Sic Transit Gloria  

E-print Network

, Cambridge CB2 0RE, UK 4Wellcome Trust Centre for Stem Cell Research, Tennis Court Road, Cambridge CB2 1QRCell Stem Cell Review Sic Transit Gloria: Farewell to the Epidermal Transit Amplifying Cell? Philip H. Jones,1,* Benjamin D. Simons,2 and Fiona M. Watt3,4 1MRC Cancer Cell Unit, Hutchison-MRC Research

Simons, Ben

390

THE PROBLEM OF TRANSITION IN PALEONTOLOGY  

Microsoft Academic Search

The author equates paleontology and phylogeny and discusses principles and problems of transitions found in the phylogentic approach to taxonomy. opics discussed include: subspecies and species (time needed for new species to become isolated is 500 to 1,000 years); the morphological exclusiveness of genera in the differential diagnoses of species, evolutionary patterns of transition in time, the biogenetic law (“Ontogenesis

V. Ye. Ruzhentsev

1964-01-01

391

Transiting Exoplanet Observations at Grinnell College  

NASA Astrophysics Data System (ADS)

Grinnell College, a small liberal arts college in Grinnell, Iowa with 1600 undergraduate students, is home to the Grant O. Gale Observatory. Over the past year, we have successfully detected extrasolar planets using the transit method with our 24-inch Cassegrain reflecting telescope equipped with a CCD camera. With little light pollution and an easily accessible observatory, Grinnell College is an optimal location for transiting exoplanet observations. With the current telescope set-up and CCD camera, we have taken time series data and created image calibration and post-processing programs that detect exoplanet transits at high photometric precision. In the future, we will continue to use these observation and data reduction procedures to conduct transiting exoplanet research. Goals for our research program include performing follow-up observations of transiting exoplanet candidates to confirm their planetary nature, searching for additional exoplanets in known planetary systems using the transit timing detection method, tracking long period transiting planets, and refining properties of exoplanets and their host stars. Ground-based transiting planet science is especially important in the post-Kepler era, and our dedicated mid-sized telescope with plenty of access to dark clear nights provides an ideal resource for a variety of follow up and exoplanet detection efforts.

Sauerhaft, Julia; Slough, P.; Cale, B.; Kempton, E.

2014-01-01

392

Battery Transition Systems The Interdisciplinary Center, Herzliya,  

E-print Network

. Introduction Systems with limited energy resources, such as mobile devices or electric cars, have becomeBattery Transition Systems Udi Boker The Interdisciplinary Center, Herzliya, Israel Thomas A. Based on a discretization of a standard continuous battery model, we introduce battery transition

Boker, Udi

393

Programmable research approach to transit marketing  

Microsoft Academic Search

A program of research designed to illustrate a potentially useful series of methodologies for transportation marketing research is reported in three phases. Phase one of the research identified the characteristics of individuals who were likely to switch their mode of transportation from the automobile to mass transit, and investigated the transit-system characteristics that determined this modal choice. Based on the

L. L. Golden; M. I. Alpert; J. F. Betak

1980-01-01

394

High Frequency Microphone Measurements for Transition Detection  

E-print Network

! High Frequency Microphone Measurements for Transition Detection on Airfoils Mads Døssing Risø Døssing Risø­R­1645(EN) Title: High Frequency Microphone Measurements for Transition Detection on Airfoils of airfoils un- dergoing wind tunnel tests in the LM Windtunnel, owned by 'LM Glasfiber', Denmark. The present

395

Transition electromagnetic fields in particle physics  

Microsoft Academic Search

We present a computation of one-loop effective potentials for elementary systems placed in a strong magnetic or a laser-produced electromagnetic environment. This permits a determination in principle of a hierarchy of transition field strengths, for which the systems concerned may (for appropriate values of the parameters in the theory) make transitions from a spontaneously broken asymmetric phase to one of

Abdus Salam; J. Strathdee

1975-01-01

396

Method for dry etching of transition metals  

DOEpatents

A method for dry etching of transition metals. The method for dry etching of a transition metal (or a transition metal alloy such as a silicide) on a substrate comprises providing at least one nitrogen- or phosphorous-containing .pi.-acceptor ligand in proximity to the transition metal, and etching the transition metal to form a volatile transition metal/.pi.-acceptor ligand complex. The dry etching may be performed in a plasma etching system such as a reactive ion etching (RIE) system, a downstream plasma etching system (i.e. a plasma afterglow), a chemically-assisted ion beam etching (CAIBE) system or the like. The dry etching may also be performed by generating the .pi.-acceptor ligands directly from a ligand source gas (e.g. nitrosyl ligands generated from nitric oxide), or from contact with energized particles such as photons, electrons, ions, atoms, or molecules. In some preferred embodiments of the present invention, an intermediary reactant species such as carbonyl or a halide ligand is used for an initial chemical reaction with the transition metal, with the intermediary reactant species being replaced at least in part by the .pi.-acceptor ligand for forming the volatile transition metal/.pi.-acceptor ligand complex.

Ashby, Carol I. H. (Edgewood, NM); Baca, Albert G. (Albuquerque, NM); Esherick, Peter (Albuquerque, NM); Parmeter, John E. (Albuquerque, NM); Rieger, Dennis J. (Tijeras, NM); Shul, Randy J. (Albuquerque, NM)

1998-01-01

397

Transition: Old Wine in New Bottles.  

ERIC Educational Resources Information Center

The 1980s movement for improved transition of handicapped youth from school to work is considered in light of similar previous movements: (1) the career education movement of the 1970s and (2) the work/study movement of the 1960s. The influence of broad social issues (such as educational reform) on outcomes for the transition movement is stressed.…

Halpern, Andrew S.

1992-01-01

398

Topology changing transitions in supersymmetric linear ?-models  

NASA Astrophysics Data System (ADS)

We analyze the two-dimensional supersymmetric linear ?-model with U(1) gauge symmetries that includes a Calabi-Yau phase and a possible Landau-Ginzburg phase. We demonstrate the topology changing transitions among the generic vacua of various linear ?-models. In the supersymmetric transition the determinantal contraction naturally arises.

Ryang, Shijong

1995-02-01

399

Electrically driven phase transition in magnetite nanostructures.  

PubMed

Magnetite (Fe3O4), an archetypal transition-metal oxide, has been used for thousands of years, from lodestones in primitive compasses to a candidate material for magnetoelectronic devices. In 1939, Verwey found that bulk magnetite undergoes a transition at TV approximately 120 K from a high-temperature 'bad metal' conducting phase to a low-temperature insulating phase. He suggested that high-temperature conduction is through the fluctuating and correlated valences of the octahedral iron atoms, and that the transition is the onset of charge ordering on cooling. The Verwey transition mechanism and the question of charge ordering remain highly controversial. Here, we show that magnetite nanocrystals and single-crystal thin films exhibit an electrically driven phase transition below the Verwey temperature. The signature of this transition is the onset of sharp conductance switching in high electric fields, hysteretic in voltage. We demonstrate that this transition is not due to local heating, but instead is due to the breakdown of the correlated insulating state when driven out of equilibrium by electrical bias. We anticipate that further studies of this newly observed transition and its low-temperature conducting phase will shed light on how charge ordering and vibrational degrees of freedom determine the ground state of this important compound. PMID:18084295

Lee, Sungbae; Fursina, Alexandra; Mayo, John T; Yavuz, Cafer T; Colvin, Vicki L; Sofin, R G Sumesh; Shvets, Igor V; Natelson, Douglas

2008-02-01

400

Electrically driven phase transition in magnetite nanostructures  

NASA Astrophysics Data System (ADS)

Magnetite (Fe3O4), an archetypal transition-metal oxide, has been used for thousands of years, from lodestones in primitive compasses to a candidate material for magnetoelectronic devices. In 1939, Verwey found that bulk magnetite undergoes a transition at TV~120K from a high-temperature `bad metal' conducting phase to a low-temperature insulating phase. He suggested that high-temperature conduction is through the fluctuating and correlated valences of the octahedral iron atoms, and that the transition is the onset of charge ordering on cooling. The Verwey transition mechanism and the question of charge ordering remain highly controversial. Here, we show that magnetite nanocrystals and single-crystal thin films exhibit an electrically driven phase transition below the Verwey temperature. The signature of this transition is the onset of sharp conductance switching in high electric fields, hysteretic in voltage. We demonstrate that this transition is not due to local heating, but instead is due to the breakdown of the correlated insulating state when driven out of equilibrium by electrical bias. We anticipate that further studies of this newly observed transition and its low-temperature conducting phase will shed light on how charge ordering and vibrational degrees of freedom determine the ground state of this important compound.

Lee, Sungbae; Fursina, Alexandra; Mayo, John T.; Yavuz, Cafer T.; Colvin, Vicki L.; Sumesh Sofin, R. G.; Shvets, Igor V.; Natelson, Douglas

2008-02-01

401

On the reliability of atomic transition integrals  

NASA Astrophysics Data System (ADS)

A simple procedure due to Layzer and Garstang for estimating the reliability of calculated dipole-length transition integrals is re-examined. Some recent Hartree—Fock f-values of Ghoshal, Dutta and Sengupta for helium-sequence transitions are analyzed and corrected, and are shown to be of generally high accuracy.

Cohen, Maurice

1981-08-01

402

Local transition functions of quantum Turing machines  

Microsoft Academic Search

Foundations of the notion of quantum Turing machines are investigated. Accord- ing to Deutsch's formulation, the time evolution of a quantum Turing machine is to be determined by the local transition function. In this paper, the local transition func- tions are characterized for fully general quantum Turing machines, including multi-tape quantum Turing machines, extending the results due to Bernstein and

Masanao Ozawa; Harumichi Nishimura

2000-01-01

403

Structure and Agency in Transition Research  

ERIC Educational Resources Information Center

Based on the results of transition studies in the UK, Germany, USA and Canada, the virtues of analysing the structural contexts, institutional arrangements and the young peoples' action orientations are presented. In the first decade of the twenty-first century, school and the labour market have become more and more decoupled and transition routes…

Heinz, Walter R.

2009-01-01

404

Sustaining Secondary Transition Programs in Local Schools  

ERIC Educational Resources Information Center

This article reports on factors that influence the sustainability of secondary transition innovations in local schools. We used a two-stage research process, which combined broad survey methods and an embedded case study design, to investigate the sustainability of a specific school-to-community transition model for youth with disabilities. We…

Benz, M. R.; Lindstrom, L.; Unruh, D.; Waintrup, M.

2004-01-01

405

Detection of Terrestrial Planets Using Transit Photometry  

NASA Technical Reports Server (NTRS)

Transit photometry detection of planets offers many advantages: an ability to detect terrestrial size planets, direct determination of the planet's size, applicability to all main-sequence stars, and a differential brightness change of the periodic signature being independent of stellar distance or planetary orbital semi-major axis. Ground and space based photometry have already been successful in detecting transits of the giant planet HD209458b. However, photometry 100 times better is required to detect terrestrial planets. We present results of laboratory measurements of an end-to-end photometric system incorporating all of the important confounding noise features of both the sky and a space based photometer including spacecraft jitter. In addition to demonstrating an instrumental noise of less than 10 ppm (an Earth transit of a solar-like star is 80 ppm), the brightnesses of individual stars were dimmed to simulate Earth-size transit signals. These 'transits' were reliably detected as part of the tests.

Koch, David; Witteborn, Fred; Jenkins, Jon; Dunham, Edward; Boruci, William; DeVincenzi, Donald (Technical Monitor)

2001-01-01

406

C-type transitions in methyl formate  

NASA Technical Reports Server (NTRS)

Based on previously determined spectral constants for methyl formate in its ground torsional degenerate substate, the frequencies and intensities of forbidden c-type transitions in this molecule, which is represented by a large number of lines in OMC-1, are calculated along with other 'forbidden' transitions labeled x-type. The stronger c-type transitions below 300 GHz with angular momentum quantum number of 30 or less and with upper state rotational energy of 350/cm or less are included in a list of spectral frequencies presented in this paper. Because the c-type transitions borrow intensity from the b-type transitions, the intensities of strongly affected b-type spectra are recalculated and presented.

Plummer, Grant M.; Herbst, Eric; De Lucia, Frank C.

1987-01-01

407

Electroweak phase transition in ultraminimal technicolor  

SciTech Connect

We unveil the temperature-dependent electroweak phase transition in new extensions of the standard model in which the electroweak symmetry is spontaneously broken via strongly coupled, nearly conformal dynamics achieved by the means of multiple matter representations. In particular, we focus on the low energy effective theory introduced to describe ultra minimal walking technicolor at the phase transition. Using the one-loop effective potential with ring improvement, we identify regions of parameter space, which yield a strong first-order transition. A striking feature of the model is the existence of a second phase transition associated to the electroweak-singlet sector. The interplay between these two transitions leads to an extremely rich phase diagram.

Jaervinen, Matti; Sannino, Francesco [University of Southern Denmark, Campusvej 55, DK-5230 Odense M (Denmark); Ryttov, Thomas A. [Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen O (Denmark)

2009-05-01

408

Roughening transition in a moving contact line.  

PubMed

The dynamics of the deformations of a moving contact line on a disordered substrate is formulated, taking into account both local and hydrodynamic dissipation mechanisms. It is shown that both the coating transition in contact lines receding at relatively high velocities and the pinning transition for slowly moving contact lines can be understood in a unified framework as roughening transitions in the contact line. We propose a phase diagram for the system in which the phase boundaries corresponding to the coating transition and the pinning transition meet at a junction point, and suggest that for sufficiently strong disorder a receding contact line will leave a Landau-Levich film immediately after depinning. PMID:12689076

Golestanian, Ramin; Raphaël, Elie

2003-03-01

409

Magnetic phase transitions in layered intermetallic compounds  

NASA Astrophysics Data System (ADS)

Magnetic, magnetoelastic, and magnetotransport properties have been studied for the RMn2Si2 and RMn6Sn6 (R is a rare earth metal) intermetallic compounds with natural layered structure. The compounds exhibit wide variety of magnetic structures and magnetic phase transitions. Substitution of different R atoms allows us to modify the interatomic distances and interlayer exchange interactions thus providing the transition from antiferromagnetic to ferromagnetic state. Near the boundary of this transition the magnetic structures are very sensitive to the external field, temperature and pressure. The field-induced transitions are accompanied by considerable change in the sample size and resistivity. It has been shown that various magnetic structures and magnetic phase transitions observed in the layered compounds arise as a result of competition of the Mn-Mn and Mn-R exchange interactions.

Mushnikov, N. V.; Gerasimov, E. G.; Rosenfeld, E. V.; Terent'ev, P. B.; Gaviko, V. S.

2012-10-01

410

Revisiting the Flocking Transition Using Active Spins  

NASA Astrophysics Data System (ADS)

We consider an active Ising model in which spins both diffuse and align on lattice in one and two dimensions. The diffusion is biased so that plus or minus spins hop preferably to the left or to the right, which generates a flocking transition at low temperature and high density. We construct a coarse-grained description of the model that predicts this transition to be a first-order liquid-gas transition in the temperature-density ensemble, with a critical density sent to infinity. In this first-order phase transition, the magnetization is proportional to the liquid fraction and thus varies continuously throughout the phase diagram. Using microscopic simulations, we show that this theoretical prediction holds in 2D whereas the fluctuations alter the transition in 1D, preventing, for instance, any spontaneous symmetry breaking.

Solon, A. P.; Tailleur, J.

2013-08-01

411

Transitions in the quantum computational power  

NASA Astrophysics Data System (ADS)

We construct two spin models on lattices (both two and three dimensional) to study the capability of quantum computational power as a function of temperature and the system parameter. There exists a finite region in the phase diagram such that the thermal equilibrium states are capable of providing a universal fault-tolerant resource for measurement-based quantum computation. Moreover, in such a region the thermal resource states on the three-dimensional lattices can enable topological protection for quantum computation. The two models behave similarly in terms of quantum computational power. However, they have different properties in terms of the usual phase transitions. The first model has a first-order phase transition only at zero temperature whereas there is no transition at all in the second model. Interestingly, the transition in the quantum computational power does not coincide with the phase transition in the first model.

Wei, Tzu-Chieh; Li, Ying; Kwek, Leong Chuan

2014-05-01

412

Transitions in the quantum computational power  

E-print Network

We construct two spin models on lattices (both two and three-dimensional) to study the capability of quantum computational power as a function of temperature and the system parameter. There exists a finite region in the phase diagram such that the thermal equilibrium states are capable of providing a universal fault-tolerant resource for measurement-based quantum computation. Moreover, in such a region the thermal resource states on the 3D lattices can enable topological protection for quantum computation. The two models behave similarly in terms of quantum computational power. However, they have different properties in terms of the usual phase transitions. The first model has a first-order phase transition only at zero temperature whereas there is no transition at all in the second model. Interestingly, the transition in the quantum computational power does not coincide with the phase transition in the first model.

Tzu-Chieh Wei; Ying Li; Leong Chuan Kwek

2014-05-16

413

First-order dynamical phase transitions.  

PubMed

Recently, dynamical phase transitions have been identified based on the nonanalytic behavior of the Loschmidt echo in the thermodynamic limit [Heyl et al., Phys. Rev. Lett. 110, 135704 (2013)]. By introducing conditional probability amplitudes, we show how dynamical phase transitions can be further classified, both mathematically, and potentially in experiment. This leads to the definition of first-order dynamical phase transitions. Furthermore, we develop a generalized Keldysh formalism which allows us to use nonequilibrium dynamical mean-field theory to study the Loschmidt echo and dynamical phase transitions in high-dimensional, nonintegrable models. We find dynamical phase transitions of first order in the Falicov-Kimball model and in the Hubbard model. PMID:25615356

Canovi, Elena; Werner, Philipp; Eckstein, Martin

2014-12-31

414

First-Order Dynamical Phase Transitions  

NASA Astrophysics Data System (ADS)

Recently, dynamical phase transitions have been identified based on the nonanalytic behavior of the Loschmidt echo in the thermodynamic limit [Heyl et al., Phys. Rev. Lett. 110, 135704 (2013)]. By introducing conditional probability amplitudes, we show how dynamical phase transitions can be further classified, both mathematically, and potentially in experiment. This leads to the definition of first-order dynamical phase transitions. Furthermore, we develop a generalized Keldysh formalism which allows us to use nonequilibrium dynamical mean-field theory to study the Loschmidt echo and dynamical phase transitions in high-dimensional, nonintegrable models. We find dynamical phase transitions of first order in the Falicov-Kimball model and in the Hubbard model.

Canovi, Elena; Werner, Philipp; Eckstein, Martin

2014-12-01

415

Spin transition in Fe-bearing perovskite  

NASA Astrophysics Data System (ADS)

The Earth's lower mantle, which is the largest part by volume of our planet, is mainly formed of Fe- and Al- bearing MgSiO3 perovskite (pv). The Fe-component exhibits a spin transition under pressure whose nature and outcome is still a matter of debate. Here we are using lattice dynamical calculations based on density functional perturbation theory to disentangle a part of its complex phase diagram and the spin behavior. To do this we investigate the dynamic stability of Pbnm FeSiO3 pv and show the existence of unstable phonon modes. We track the eigen-displacements of the phonons modes to find low-spin and intermediate spin states. On solid-state physical basis we explore a set of hypothetical structures with various spin configurations and considerably lower enthalpy than the parent orthorhombic Pbnm structure. We show that the spin evolves along a high-spin to mixed high- and intermediate spin to low-spin transition sequence. Based on numerical results from first-principles calculations, we show that the spin transitions can be observed experimentally in X-ray diffraction and Raman measurements. New diffraction peaks form during the spin transition, which are explained by the associated symmetry breaking. Certain observable Raman peaks exhibit a shift at the transition; the Grueneisen parameters of certain few modes are affected by the transition. The spin transition affects the seismic anisotropy pattern of perovskite. However it does not affect the elastic moduli and the bulk seismic wave velocities are weakly affected by the spin transition. [1]. These signatures are detectable by seismic observations and they need to be taken into account in tomographic studies of the Earth's lower mantle. Finally we show that the iron spin transition develops also in compressed glasses, but over a broad pressure range. More interestingly this transition can pass by an intermediate spin state configuration. [1] Caracas, Mainprice, and Thomas (2010) Geophys. Res. Lett. 37, L13309.

Caracas, R.

2012-04-01

416

Wisconsin Community of Practice on Transition Practice Group on Health  

E-print Network

into all aspects of transition. The Children and Youth with Special Health Care Needs Program, within to this second edition as well. #12;TTTTTransition to Adult Health Care Transition to Adult Health Care Transition to Adult Health Care Transition to Adult Health Care Transition to Adult Health Care Table

Wisconsin at Madison, University of

417

I -3 Structure interne de la Terre Transition Ol  

E-print Network

I - 3 Structure interne de la Terre · Transition Ol 410 -- Ol : - pente de Clapeyron "dP dT " 410 positive - transition exothermique · Transition Ol 660 -- Ol : - pente de Clapeyron "dP dT " 660 négative Ol 410 -- Ol : - pente de Clapeyron "dP dT " 410 positive - transition exothermique · Transition Ol

Grigné, Cécile

418

Transit-Oriented Communities: a Blueprint for Bellingham, WA.  

E-print Network

1 Transit-Oriented Communities: a Blueprint for Bellingham, WA. 2011 Urban Transitions Studio (UTS) March 10, 2011 #12;2 1.0 Introduction March 10, 2011 2011 Urban Transitions Studio (UTS) Transit's Urban Transitions Studio project by examining redevelopment opportunities for six locations

Zaferatos, Nicholas C.

419

Evolutionary transitions in parental care and live bearing in vertebrates  

Microsoft Academic Search

We provide the é rst review of phylogenetic transitions in parental care and live bearing for a wide variety of vertebrates. This includes new analyses of both numbers of transitions and transition probabilities. These reveal numerous transitions by shorebirds and anurans toward uniparental care by either sex. Whereas most or all of the shorebird transitions were from biparental care, nearly

John D. Reynolds; Nicholas B. Goodwin; Robert P. Freckleton

2002-01-01

420

The Soviet Union in transition  

SciTech Connect

Because of the recent transition in the Soviet Union's leadership, scholars worldwide have found it necessary to reevaluate Soviet domestic and foreign policy. In this book, prominent Japanese, U.S., and European experts examine changes within the USSR as well as Soviet reactions to changes in the rest of the world. They assess the immediate implications of change for such areas as technology, energy policy, and economic reform and deliver commentaries on current policy directions and historical backgrounds of Soviet policies. The Japan Institute of International Affairs held the symposium on which this volume is based to commemorate its silver jubilee and to add the valuable perspective of Japanese Soviet studies scholars to Western analyses. Contents: Introduction; The Soviet Union in a Changing World; East-West Relations: A European Perspective; ''Gorbachevism''-Simply Old Wine in a New Bottle. Implications of Leadership and Social Change for Soviet Policies; Soviet Economic Trends, with Special Emphasis on Investment and Energy Policies; Economic Reforms in China in Light of Soviet and Eastern European Experiences.

Niiseki, K.

1987-01-01

421

Observability transitions in correlated networks  

NASA Astrophysics Data System (ADS)

Yang, Wang, and Motter [Phys. Rev. Lett.PRLTAO0031-900710.1103/PhysRevLett.109.258701 109, 258701 (2012)] analyzed a model for network observability transitions in which a sensor placed on a node makes the node and the adjacent nodes observable. The size of the connected components comprising the observable nodes is a major concern of the model. We analyze this model in random heterogeneous networks with degree correlation. With numerical simulations and analytical arguments based on generating functions, we find that negative degree correlation makes networks more observable. This result holds true both when the sensors are placed on nodes one by one in a random order and when hubs preferentially receive the sensors. Finally, we numerically optimize networks with a fixed degree sequence with respect to the size of the largest observable component. Optimized networks have negative degree correlation induced by the resulting hub-repulsive structure; the largest hubs are rarely connected to each other, in contrast to the rich-club phenomenon of networks.

Hasegawa, Takehisa; Takaguchi, Taro; Masuda, Naoki

2013-10-01

422

QCD Phase Transitions, Volume 15  

SciTech Connect

The title of the workshop, ''The QCD Phase Transitions'', in fact happened to be too narrow for its real contents. It would be more accurate to say that it was devoted to different phases of QCD and QCD-related gauge theories, with strong emphasis on discussion of the underlying non-perturbative mechanisms which manifest themselves as all those phases. Before we go to specifics, let us emphasize one important aspect of the present status of non-perturbative Quantum Field Theory in general. It remains true that its studies do not get attention proportional to the intellectual challenge they deserve, and that the theorists working on it remain very fragmented. The efforts to create Theory of Everything including Quantum Gravity have attracted the lion share of attention and young talent. Nevertheless, in the last few years there was also a tremendous progress and even some shift of attention toward emphasis on the unity of non-perturbative phenomena. For example, we have seen some efforts to connect the lessons from recent progress in Supersymmetric theories with that in QCD, as derived from phenomenology and lattice. Another example is Maldacena conjecture and related development, which connect three things together, string theory, super-gravity and the (N=4) supersymmetric gauge theory. Although the progress mentioned is remarkable by itself, if we would listen to each other more we may have chance to strengthen the field and reach better understanding of the spectacular non-perturbative physics.

Schaefer, T.; Shuryak, E.

1999-03-20

423

Metabolic transit of dietary methylglyoxal.  

PubMed

Methylglyoxal (MGO) is responsible for the pronounced antibacterial activity of manuka honey, in which it may reach concentrations up to 800 mg/kg. As MGO formed in vivo is discussed to play a role in diabetic complications, the metabolic transit of dietary MGO was studied within a 3 day dietary recall with four healthy volunteers. Determination of MGO in 24 h urine was performed with GC-MS after derivatization with O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine, and D-lactate was quantified enzymatically. Following a diet virtually free from MGO and other glycation compounds, a defined amount of MGO (500 ?mol in manuka honey) was administered in the morning of day 2. Renal excretion was between 0.1 and 0.4 ?mol/day for MGO and between 50 and 220 ?mol/day for D-lactate. No influence on excretion of both compounds was observed following administration of MGO. To investigate the stability of MGO under physiological conditions, a simulated in vitro gastrointestinal digestion was performed with MGO-containing honey. After 8 h of in vitro digestion, only 5-20% of the initial methylglyoxal was recovered. This indicates that dietary MGO is rapidly degraded during the digestion process in the intestine and, therefore, exerts no influence on the MGO level in vivo. PMID:23451712

Degen, Julia; Vogel, Maria; Richter, Doreen; Hellwig, Michael; Henle, Thomas

2013-10-30

424

Lunar transit telescope lander design  

NASA Technical Reports Server (NTRS)

The Program Development group at NASA's Marshall Space Flight Center has been involved in studying the feasibility of placing a 16 meter telescope on the lunar surface to scan the skies using visible/ Ultraviolet/ Infrared light frequencies. The precursor telescope is now called the TRANSIT LUNAR TELESCOPE (LTT). The Program Development Group at Marshall Space Flight Center has been given the task of developing the basic concepts and providing a feasibility study on building such a telescope. The telescope should be simple with minimum weight and volume to fit into one of the available launch vehicles. The preliminary launch date is set for 2005. A study was done to determine the launch vehicle to be used to deliver the telescope to the lunar surface. The TITAN IV/Centaur system was chosen. The engineering challenge was to design the largest possible telescope to fit into the TITAN IV/Centaur launch system. The telescope will be comprised of the primary, secondary and tertiary mirrors and their supporting system in addition to the lander that will land the telescope on the lunar surface and will also serve as the telescope's base. The lunar lander should be designed integrally with the telescope in order to minimize its weight, thus allowing more weight for the telescope and its support components. The objective of this study were to design a lander that meets all the constraints of the launching system. The basic constraints of the TITAN IV/Centaur system are given.

Omar, Husam A.

1991-01-01

425

Lunar transit telescope lander design  

NASA Technical Reports Server (NTRS)

The Program Development group at NASA's Marshall Space Flight Center has been involved in studying the feasibility of placing a 16 meter telescope on the lunar surface to scan the skies using visible/ Ultraviolet/ Infrared light frequencies. The precursor telescope is now called the TRANSIT LUNAR TELESCOPE (LTT). The Program Development Group at Marshall Space Flight Center has been given the task of developing the basic concepts and providing a feasibility study on building such a telescope. The telescope should be simple with minimum weight and volume to fit into one of the available launch vehicles. The preliminary launch date is set for 2005. A study was done to determine the launch vehicle to be used to deliver the telescope to the lunar surface. The TITAN IV/Centaur system was chosen. The engineering challenge was to design the largest possible telescope to fit into the TITAN IV/Centaur launch system. The telescope will be comprised of the primary, secondary and tertiary mirrors and their supporting system in addition to the lander that will land the telescope on the lunar surface and will also serve as the telescope's base. The lunar lander should be designed integrally with the telescope in order to minimize its weight, thus allowing more weight for the telescope and its support components. The objective of this study were to design a lander that meets all the constraints of the launching system. The basic constraints of the TITAN IV/Centaur system are given.

Omar, Husam A.

1992-01-01

426

Quantum phase transitions in disordered antiferromagnets  

NASA Astrophysics Data System (ADS)

Recently quantum phase transitions have attracted the interest of both theorists and experimentalists in condensed matter physics. Quantum magnets provide a perfect playground for studying these phase transitions since they can be triggered by many control parameters such as frustration, lattice dimerization, and magnetic field. Most previous studies have focused on the magnetic properties in pure systems. In these systems, responses to the triggering parameters are found to be uniform, leading to homogeneous phases. However little progress has been made so far on the phase transitions and properties in disordered quantum magnets because they are more complicated systems, and few theoretical tools can be applied. In this thesis we use the stochastic series expansion quantum Monte Carlo method to study quantum phase transitions in disordered magnets. We find that disordered magnets can behave quite differently from pure systems. The system inhomogeneity can strongly affect phase transitions by changing their universality class. We also find order-disorder transitions are often accompanied by the appearance of novel quantum disordered phases, in which magnetic properties behave highly nontrivial, even singular. In this thesis two examples are studied in great detail. The first one is the phase diagram of an inhomogeneous, bond-diluted two-dimensional antiferromagnet near the percolation threshold. We show that the magnetic transition can be tuned by the inhomogeneity of the dilution from a classical percolation to a quantum phase transition. Interestingly the quantum transition still takes the nature of a renormalized percolative transition, with continuously varying critical exponents. A gapless quantum disordered phase with no magnetic long-range order but geometric percolation is found. The low-temperature uniform susceptibility diverges as a non-universal power-law of the temperature in this phase, indicating that this is a quantum Griffiths phase. In the second example, we study field-induced quantum phase transitions in two-dimensional site-diluted coupled dimers. We find that an extremely small field drives the order-by-disordered phase into a quantum disordered disordered-free-moment phase. The magnetization curve in this phase shows a series of pseudo-plateaus, which can be explained by the highly inhomogeneous field response of the free moments. A spin-boson mapping reveals that the disordered-free-moment phase can be understood as a low-field Bose glass phase, and hence the associated phase transition is a realization of a two-dimensional Bose-glass-to-disordered-free-moment transition. This is confirmed by the entire phase diagram and the study of the scaling behavior of correlation length, order parameter, and spin stiffness in the critical regime.

Yu, Rong

427

Student-Directed Transition Planning: Increasing Student Knowledge and Self-Efficacy in the Transition Planning Process  

ERIC Educational Resources Information Center

This study examined the effectiveness of a new school to adult life transition planning lesson package titled "Student-Directed Transition Planning". The "Student-Directed Transition Planning" lessons teach transition terms and concepts to provide a means to increase self-determination skills and student participation in transition IEP…

Woods, Lee L.; Sylvester, Lorraine; Martin, James E.

2010-01-01

428

Game Theory and Topological Phase Transition  

E-print Network

Phase transition is a war game. It widely exists in different kinds of complex system beyond physics. Where there is revolution, there is phase transition. The renormalization group transformation, which was proved to be a powerful tool to study the critical phenomena, is actually a game process. The phase boundary between the old phase and new phase is the outcome of many rounds of negotiation between the old force and new force. The order of phase transition is determined by the cutoff of renormalization group transformation. This definition unified Ehrenfest's definition of phase transition in thermodynamic physics. If the strategy manifold has nontrivial topology, the topological relation would put a constrain on the surviving strategies, the transition occurred under this constrain may be called a topological one. If the strategy manifold is open and noncompact, phase transition is simply a game process, there is no table for topology. An universal phase coexistence equation is found, it sits at the Nash equilibrium point. Inspired by the fractal space structure demonstrated by renormalization group theory, a conjecture is proposed that the universal scaling law of a general phase transition in a complex system comes from the coexistence equation around Nash equilibrium point. Game theory also provide us new understanding to pairing mechanism and entanglement in many body physics.

Tieyan Si

2006-01-02

429

Simplified lattice model for polypeptide fibrillar transitions  

NASA Astrophysics Data System (ADS)

Polypeptide fibrillar transitions are studied using a simplified lattice model, modified from the three-state Potts model, where uniform residues as spins, placed on a cubic lattice, can interact with neighbors to form coil, helical, sheet, or fibrillar structure. Using the transfer matrix method and numerical calculations, we analyzed the partition function and construct phase diagrams. The model manifests phase transitions among coil, helix, sheet, and fibril through parameterizing bond coupling energy ?h,?s,?f, structural entropies sh,ss,sf of helical, sheet, and fibrillar states, and number density ?. The phase diagrams show the transition sequence is basically governed by ?h, ?s, and ?f, while the transition temperature is determined by the competition among ?h, ?s, and ?f, as well as sh, ss, sf, and ?. Furthermore, the fibrillation is accompanied with an abrupt phase transition from coil, helix, or sheet to fibril even for short polypeptide length, resembling the feature of nucleation-growth process. The finite-size effect in specific heat at transitions for the nonfibrillation case can be described by the scaling form of lattice model. With rich phase-transition properties, our model provides a useful reference for protein aggregation experiments and modeling.

Xiao, Xuhui; Wu, Ming-Chya

2014-10-01

430

Evolutionary alkaline transition in human cytochrome c.  

PubMed

Conformational transitions in cytochrome c (cyt c) are being realized to be responsible for its multi-functions. Among a number of conformational transitions in cyt c, the alkaline transition has attracted much attention. The cDNA of human cyt c is cloned by RT-PCR and a high-effective expression system for human cyt c has been developed in this study. The equilibrium and kinetics of the alkaline transition of human cyt c have been systematically investigated for the first time, and compared with those of yeast and horse cyt c from an evolutionary perspective. The pK(a) value for the alkaline transition of human cyt c is apparently higher than that of yeast and horse. Kinetic studies suggest that it is increasingly difficult for the alkaline transition of cyt c from yeast, horse and human. Molecular modeling of human cyt c shows that the omega loop where the lysine residue is located apparently further away from heme in human cyt c than in yeast iso-1 and horse heart cyt c. These results regarding alkaline conformational transition provide valuable information for understanding the molecular basis for the biological multi-functions of cyt c. PMID:19593652

Ying, Tianlei; Zhong, Fangfang; Xie, Jin; Feng, Yanjiao; Wang, Zhong-Hua; Huang, Zhong-Xian; Tan, Xiangshi

2009-06-01

431

Shape phase transitions and critical points  

SciTech Connect

We investigate different aspects connected with shape phase transitions in nuclei and the possible occurrence of dynamical symmetries at the critical points. We discuss in particular the behaviour of the neighbour odd nuclei at the vicinity of the critical points in the even nuclei. We consider both the case of the transition from the vibrational behaviour to the gamma-unstable deformation (characterized within the collective Bohr hamiltonian by the E(5) critical point symmetry) and the case of the transition from the vibrational behaviour to the stable axial deformation (characterized by the X(5) symmetry). The odd particle is assumed to be moving in the three single particle orbitals j = 1/2,3/2,5/2, a set of orbitals that is known to lead to possible supersymmetric cases. The coupling of the odd particle to the Bohr hamiltonian does lead in fact in the former case at the critical point to the E(5/12) boson-fermion dynamical symmetry. An alternative approach to the two shape transitions is based on the Interacting Boson Fermion Model. In this case suitably parametrized boson-fermion hamiltonians can describe the evolution of the odd system along the shape transitions. At the critical points both energy spectra and electromagnetic transitions were found to display characteristic patterns similar to those displayed by the even nuclei at the corresponding critical point. The behaviour of the odd nuclei can therefore be seen as necessary complementary signatures of the occurrence of the phase transitions.

Alonso, C. E.; Arias, J. M. [Departamento de Fisica Atomica, Molecular y Nuclear, Facultad de Fisica Universidad de Sevilla, Apartado 1065, 41080 Sevilla (Spain); Fortunato, L.; Vitturi, A. [Dipartimento di Fisica Galileo Galilei and INFN, Via Marzolo 8, 35131 Padova (Italy)

2009-05-04

432

Simplified lattice model for polypeptide fibrillar transitions.  

PubMed

Polypeptide fibrillar transitions are studied using a simplified lattice model, modified from the three-state Potts model, where uniform residues as spins, placed on a cubic lattice, can interact with neighbors to form coil, helical, sheet, or fibrillar structure. Using the transfer matrix method and numerical calculations, we analyzed the partition function and construct phase diagrams. The model manifests phase transitions among coil, helix, sheet, and fibril through parameterizing bond coupling energy ?_{h},?_{s},?_{f}, structural entropies s_{h},s_{s},s_{f} of helical, sheet, and fibrillar states, and number density ?. The phase diagrams show the transition sequence is basically governed by ?_{h}, ?_{s}, and ?_{f}, while the transition temperature is determined by the competition among ?_{h}, ?_{s}, and ?_{f}, as well as s_{h}, s_{s}, s_{f}, and ?. Furthermore, the fibrillation is accompanied with an abrupt phase transition from coil, helix, or sheet to fibril even for short polypeptide length, resembling the feature of nucleation-growth process. The finite-size effect in specific heat at transitions for the nonfibrillation case can be described by the scaling form of lattice model. With rich phase-transition properties, our model provides a useful reference for protein aggregation experiments and modeling. PMID:25375517

Xiao, Xuhui; Wu, Ming-Chya

2014-10-01

433

Overview of escalator applications in rail transit  

NASA Technical Reports Server (NTRS)

The difference in operating environment and in construction between escalators in transit and nontransit use, the impact of recent escalator innovations, and areas which could benefit from urban mass transportation administration sponsored research and development are determined. Several factors causing a more severe transit escalator operating environment are identified. There are no significant design differences between transit and nontransit escalators. Recent innovations that have affected performance and cost include outdoor escalators, extra flat steps at both landings, and modular escalators. Data were collected by interviews at transit agencies. Long term, unscheduled, escalator maintenance records were available for analysis from one property. A description of escalator operating principles is provided. Transit represents less than 5% of the U.S. escalator market. Transit agencies have limited leverage on escalator industry practices. A substantial impact on transit escalator cost and performance can be achieved by research identifying when and how to apply and specify several of the more recent innovations. Purchase of escalators under long term (25 year) maintenance contracts is one method that has been used to promote escalators manufactured for minimum life cycle cost.

Deshpande, G.; Rubenstein, L.

1980-01-01

434

Phase transitions in the early universe  

NASA Astrophysics Data System (ADS)

I explore the theory and computation of early-Universe finite-temperature phase transitions involving scalar fields. I focus primarily on the electroweak phase transition, but some of the methods I develop are applicable to any scalar-field cosmological phase transition (such as the computation of the lifetime of zero-temperature metastable vacua). I begin by examining phase transition thermodynamics with many extra coupled degrees of freedom, finding that such transitions have the potential to produce large amounts of entropy and can significantly dilute the concentration of thermal relic species (e.g., dark matter). I then detail a novel algorithm for calculating instanton solutions with multiple dynamic scalar fields, and present a computational package which implements the algorithm and computes the finite-temperature phase structure. Next, I discuss theoretical and practical problems of gauge dependence in finite-temperature effective potentials, using the Abelian Higgs and Abelian Higgs plus singlet models to show the severity of the problem. Finally, I apply the aforementioned algorithm to the electroweak phase transition in the next-to-minimal supersymmetric standard model (NMSSM). My collaborators and I find viable regions of the NMSSM which contain a strongly first-order phase transition and large enough CP violation to support electroweak baryogenesis, evade electric dipole moment constraints, and provide a dark matter candidate which could produce the observed 130 GeV gamma-ray line observed in the galactic center by the Fermi Gamma-ray Space Telescope.

Wainwright, Carroll L.

435

Bifurcations of transition states: Morse bifurcations  

NASA Astrophysics Data System (ADS)

A transition state for a Hamiltonian system is a closed, invariant, oriented, codimension-2 submanifold of an energy level that can be spanned by two compact codimension-1 surfaces of unidirectional flux whose union, called a dividing surface, locally separates the energy level into two components and has no local recrossings. For this to happen robustly to all smooth perturbations, the transition state must be normally hyperbolic. The dividing surface then has locally minimal geometric flux through it, giving an upper bound on the rate of transport in either direction. Transition states diffeomorphic to S^{2m-3} are known to exist for energies just above any index-1 critical point of a Hamiltonian of m degrees of freedom, with dividing surfaces S^{2m-2} . The question addressed here is what qualitative changes in the transition state, and consequently the dividing surface, may occur as the energy or other parameters are varied? We find that there is a class of systems for which the transition state becomes singular and then regains normal hyperbolicity with a change in diffeomorphism class. These are Morse bifurcations. Various examples are considered. Firstly, some simple examples in which transition states connect or disconnect, and the dividing surface may become a torus or other. Then, we show how sequences of Morse bifurcations producing various interesting forms of transition state and dividing surface are present in reacting systems, by considering a hypothetical class of bimolecular reactions in gas phase.

MacKay, R. S.; Strub, D. C.

2014-05-01

436

An Institutional Approach to Understanding Energy Transitions  

NASA Astrophysics Data System (ADS)

Energy is a central concern of sustainability because how we produce and consume energy affects society, economy, and the environment. Sustainability scientists are interested in energy transitions away from fossil fuels because they are nonrenewable, increasingly expensive, have adverse health effects, and may be the main driver of climate change. They see an opportunity for developing countries to avoid the negative consequences fossil-fuel-based energy systems, and also to increase resilience, by leap-frogging-over the centralized energy grid systems that dominate the developed world. Energy transitions pose both challenges and opportunities. Obstacles to transitions include 1) an existing, centralized, complex energy-grid system, whose function is invisible to most users, 2) coordination and collective-action problems that are path dependent, and 3) difficulty in scaling up RE technologies. Because energy transitions rely on technological and social innovations, I am interested in how institutional factors can be leveraged to surmount these obstacles. The overarching question that underlies my research is: What constellation of institutional, biophysical, and social factors are essential for an energy transition? My objective is to derive a set of "design principles," that I term institutional drivers, for energy transitions analogous to Ostrom's institutional design principles. My dissertation research will analyze energy transitions using two approaches: applying the Institutional Analysis and Development Framework and a comparative case study analysis comprised of both primary and secondary sources. This dissertation includes: 1) an analysis of the world's energy portfolio; 2) a case study analysis of five countries; 3) a description of the institutional factors likely to promote a transition to renewable-energy use; and 4) an in-depth case study of Thailand's progress in replacing nonrenewable energy sources with renewable energy sources. My research will contribute to our understanding of how energy transitions at different scales can be accomplished in developing countries and what it takes for innovation to spread in a society.

Koster, Auriane Magdalena

437

Quantum phase transitions in disordered magnets  

NASA Astrophysics Data System (ADS)

We study the effects of quenched weak disorder on quantum phase transitions in disordered magnets. The presence of disorder in the system can lead to a variety of exotic phenomena, e.g., the smearing of transitions or quantum Griffiths singularities. Phase transitions are smeared if individual spatial regions can order independently of the bulk system. In paper I, we study smeared quantum phase transitions in binary alloys A1-xBx that are tuned by changing the composition x. We show that in this case the ordered phase is extended over all compositions x < 1. We also study the composition dependence of observables. In paper II, we investigate the influence of spatial disorder correlations on smeared phase transitions. As an experimental example, we demonstrate in paper III, that the composition-driven ferromagnetic-toparamagnetic quantum phase transition in Sr1-xCaxRuO3 is smeared. When individual spatial regions cannot order but fluctuate slowly, the phase transition is characterized by strong singularities in the quantum Griffiths phase. In paper IV, we develop a theory of the quantum Griffiths phases in disordered ferromagnetic metals. We show that the quantum Griffiths singularities are stronger than the usual power-law quantum Griffiths singularities in insulating magnets. In paper V, we present an efficient numerical method for studying quantum phase transitions in disordered systems with O(N) order parameter symmetry in the large-N limit. Our algorithm solves iteratively the large-N self-consistent equations for the renormalized distances from criticality. Paper VI is devoted to the study of transport properties in the quantum Griffiths phase associated with the antiferromagnetic quantum phase transition in a metal. We find unusual behavior of transport properties which is in contrast to the normal Fermi-liquid behavior.

Nozadze, David

438

Imaging diagnostics for transitional discs  

NASA Astrophysics Data System (ADS)

Transitional discs are a special type of protoplanetary disc, where planet formation is thought to be taking place. These objects feature characteristic inner cavities and/or gaps of a few tens of AUs in sub-millimetre images of the disc. This signature suggests a localised depletion of matter in the disc that could be caused by planet formation processes. However, recent observations have revealed differences in the structures imaged at different wavelengths in some of these discs. In this paper, we aim to explain these observational differences using self-consistent physical 2D hydrodynamical and dust evolution models of these objects, assuming their morphology is indeed generated by the presence of a planet. We use these models to derive the distribution of gas and dust in a theoretical planet-hosting disc for various planet masses and orbital separations. We then simulate observations of the emitted and scattered light from these models with Very Large Telescope (VLT)/SPHERE-ZIMPOL, Subaru/HiCIAO, VLT/VISIR, and ALMA. We do this by first computing the full resolution images of the models at different wavelengths and then simulating the observations while accounting for the characteristics of each particular instrument. The presence of the planet generates pressure bumps in the gas distribution of the disc, whose characteristics strongly depend on the planet mass and position. These bumps cause large grains to accumulate, while small grains are allowed into inner regions. This spatial differentiation of the grain sizes explains the differences in the observations, since different wavelengths and observing techniques trace different parts of the dust size distribution. Based on this effect, we conclude that the combination of visible/near-infrared polarimetric and sub-mm images is the best strategy to constrain the properties of the unseen planet responsible for the disc structure.

de Juan Ovelar, M.; Min, M.; Dominik, C.; Thalmann, C.; Pinilla, P.; Benisty, M.; Birnstiel, T.

2013-12-01

439

Prison Health in Transitional Albania  

PubMed Central

Aim: The information about prisoners’ health in transitional countries including Albania is limited. The aim of our study was to assess the health status and its correlates among adult prisoners in Albania, a post-communist country in Southeast Europe. Methods: This was a cross-sectional study conducted in 2013 including 401 prisoners in Albania [290 (72%) males and 111 (28%) females]. All participants were administered an anonymous and structured questionnaire including information on self-perceived health status, health-related problems, lifestyle factors (smoking, alcohol intake and drug use) and demographic and socioeconomic characteristics (age, sex, educational attainment and income level). Binary logistic regression was used to assess the association between self-reported health status and covariates. Results: Overall, 173 (43.1%) of prisoners included in this study reported a poor health status, with a clear predominance of the female gender (P<0.01). Overall, 28.1% of prisoners reported the presence of at least one disease. The overall prevalence of smoking, excessive alcohol consumption and drug use were 59.1%, 34.9% and 10.2%, respectively. Upon multivariable-adjustment, poor self-perceived health status was positively associated with female gender (OR=2.01, 95%CI=1.41-2.96), smoking (OR=1.58, 95%CI=1.29-2.04), excessive alcohol consumption (OR=1.71, 95%CI=1.38-2.13) and the presence of diseases (OR=1.86, 95%CI=1.52-2.87). Conclusion: This study provides important information about the health status among Albanian prisoners. There is an urgent need for Albania to make a significant progress in health services provision for prisoners, which constitute a particularly vulnerable population subgroup. PMID:25568531

Jaka, Drita; Roshi, Enver; Burazeri, Genc

2014-01-01

440

Observational Window Functions in Planet Transit Searches  

E-print Network

Window functions describe, as a function of orbital period, the probability that an existing planetary transit is detectable in one's data for a given observing strategy. We show the dependence of this probability upon several strategy and astrophysical parameters, such as length of observing run, observing cadence, length of night, and transit duration. The ability to detect a transit is directly related to the intrinsic noise of the observations. In our simulations of the window function, we explicitly address non-correlated (gaussian or white) noise and correlated (red) noise and discuss how these two different noise components affect window functions in different manners.

Kaspar von Braun; David R. Ciardi

2007-11-27

441

Interfacial properties of semiconducting transition metal chalcogenides  

NASA Astrophysics Data System (ADS)

This review is aimed at the correlation of structural and electronic properies of semiconducting transition metal chalcogenides with molecular surface processes and mechanisms in photoelectrochemistry, (photo)catalysis, geochemistry and hydrometallurgy. Layer-type, pyrite structured and transition metal cluster containing chalcogenides are selected as model systems to explain the principles involved. Special emphasis is given to the discussion of materials which involve transition metal d- states in the interfacial reaction pathways of holes and electrons. Since they initiate and control heterogeneous coordination chemistry at the surfaces they may provide the possibility of tailoring selective and catalytically demanding reactions. Examples of such mechanisms are presented and discussed in relation to surface properties involved.

Jaegermann, W.; Tributsch, H.

442

Thermodynamic relations for DNA phase transitions  

E-print Network

The force induced unzipping transition of a double stranded DNA is considered from a purely thermodynamic point of view. This analysis provides us with a set of relations that can be used to test microscopic theories and experiments. The thermodynamic approach is based on the hypothesis of impenetrability of the force in the zipped state. The melting and the unzipping transitions are considered in the same framework and compared with the existing statistical model results. The analysis is then extended to a possible continuous unzipping transition.

Sadhukhan, Poulomi

2014-01-01

443

Numerical simulation of instability and transition physics  

NASA Technical Reports Server (NTRS)

The study deals with the algorithm technology used in instability and transition simulations. Discretization methods are outlined, and attention is focused on high-order finite-difference methods and high-order centered-difference formulas. One advantage of finite-difference methods over spectral methods is thought to be in implementation of nonrigorous boundary conditions. It is suggested that the next significant advances in the understanding of transition physics and the ability to predict transition will come with more physically-realistic simulations. Compressible-flow algorithms are discussed, and it is noted that with further development, exploration of bypass mechanism on simple bodies at high speed would be possible.

Streett, C. L.

1990-01-01

444

Order Parameter for a Diamagnetic Phase Transition  

NASA Astrophysics Data System (ADS)

A theory of the magnetic induction bifurcation at a diamagnetic phase transition in normal metals is developed. Our results are in good agreement with the recent observation of the muon spin rotation resonance splitting in beryllium due to Condon domains, Solt et al. [Phys. Rev. Lett. 76, 2575 (1996); Hyperfine Interact. 104, 257 (1997)], being the first measurement of the onset of a diamagnetic phase transition. Temperature dependence of the order parameter, the magnetization in each Condon domain, is explained and reproduced quantitatively. A new kind of phase diagram for diamagnetic phase transitions is constructed.

Gordon, A.; Itskovsky, M. A.; Vagner, I. D.; Wyder, P.

1998-09-01

445

Effective Theory of Floquet Topological Transitions  

NASA Astrophysics Data System (ADS)

We develop a theory of topological transitions in a Floquet topological insulator, using graphene irradiated by circularly polarized light as a concrete realization. We demonstrate that a hallmark signature of such transitions in a static system, i.e., metallic bulk transport with conductivity of order e2/h , is substantially suppressed at some Floquet topological transitions in the clean system. We determine the conditions for this suppression analytically and confirm our results in numerical simulations. Remarkably, introducing disorder dramatically enhances this transport by several orders of magnitude.

Kundu, Arijit; Fertig, H. A.; Seradjeh, Babak

2014-12-01

446

Laser transit anemometer experiences in supersonic flow  

NASA Technical Reports Server (NTRS)

The purpose of this paper is to present examples of velocity measurements obtained in supersonic flow fields with the laser transit anemometer system. Velocity measurements of a supersonic jet exhausting in a transonic flow field, a cone boundary survey in a Mach 4 flow field, and a determination of the periodic disturbance frequencies of a sonic nozzle flow field are presented. Each of the above three cases also serves to illustrate different modes of laser transit anemometer operation. A brief description of the laser transit anemometer system is also presented.

Hunter, William W., Jr.; Humphreys, William M., Jr.

1988-01-01

447

Granular jamming transitions for a robotic mechanism  

NASA Astrophysics Data System (ADS)

The jamming transitions for granules growing field of interest in robotics for use in variable stiffness mechanisms. However, the traditional use of air pressure to control the jamming transition requires heavy vacuums, reducing the mobility of the robot. Thus, we propose the use of water as a hydraulic fluid to control the transition between free and clustered granules. This paper presents comparative studies that show that a hydraulic granular jammed finger joint can both achieve the same stiffness level and maintain the same hysteresis level of a pneumatic system, with only a small volume of fluid.

Jiang, Allen; Aste, Tomaso; Dasgupta, Prokar; Althoefer, Kaspar; Nanayakkara, Thrishantha

2013-06-01

448

Coupled phase transitions under periodic perturbation  

NASA Astrophysics Data System (ADS)

The influence of periodic perturbation on the system of two nonlinear stochastic equations, which model low-frequency pulsations in crisis and transient modes of heat-and-mass transfer with phase transitions, has been investigated by numerical methods. When studying the influence of the periodic perturbation on the system, a researcher should largely take into account the phase diagram. It is shown that nonequilibrium phase transitions from asymmetric cycles of phase trajectories to centrally symmetric ones occur in the absence of noise. These transitions are accompanied by the stochastic resonance response, which enhances as the frequency of the external periodic force decreases.

Koverda, V. P.; Skokov, V. N.

2014-07-01

449

Boundary-layer Transition at Supersonic Speeds  

NASA Technical Reports Server (NTRS)

Recent results of the effects of Mach number, stream turbulence, leading-edge geometry, leading-edge sweep, surface temperature, surface finish, pressure gradient, and angle of attack on boundary-layer transition are summarized. Factors that delay transition are nose blunting, surface cooling, and favorable pressure gradient. Leading-edge sweep and excessive surface roughness tend to promote early transition. The effects of leading-edge blunting on two-dimensional surfaces and surface cooling can be predicted adequately by existing theories, at least in the moderate Mach number range.

Low, George M

1956-01-01

450

45 CFR 150.221 - Transition to State enforcement.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 false Transition to State enforcement. 150...REQUIREMENTS RELATING TO HEALTH CARE ACCESS CMS ENFORCEMENT...Requirements § 150.221 Transition to State enforcement...officials to ensure that a transition is effected with respect...

2011-10-01

451

45 CFR 150.221 - Transition to State enforcement.  

Code of Federal Regulations, 2010 CFR

... 2010-10-01 false Transition to State enforcement. 150...REQUIREMENTS RELATING TO HEALTH CARE ACCESS CMS ENFORCEMENT...Requirements § 150.221 Transition to State enforcement...officials to ensure that a transition is effected with respect...

2010-10-01

452

45 CFR 150.221 - Transition to State enforcement.  

... 2014-10-01 false Transition to State enforcement. 150...REQUIREMENTS RELATING TO HEALTH CARE ACCESS CMS ENFORCEMENT...Requirement § 150.221 Transition to State enforcement...officials to ensure that a transition is effected with respect...

2014-10-01

453

45 CFR 150.221 - Transition to State enforcement.  

Code of Federal Regulations, 2013 CFR

... 2013-10-01 false Transition to State enforcement. 150...REQUIREMENTS RELATING TO HEALTH CARE ACCESS CMS ENFORCEMENT...Requirement § 150.221 Transition to State enforcement...officials to ensure that a transition is effected with respect...

2013-10-01

454

45 CFR 150.221 - Transition to State enforcement.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 false Transition to State enforcement. 150...REQUIREMENTS RELATING TO HEALTH CARE ACCESS CMS ENFORCEMENT...Requirements § 150.221 Transition to State enforcement...officials to ensure that a transition is effected with respect...

2012-10-01

455

From Survive to Thrive: The Importance of Transition  

NSDL National Science Digital Library

When schools create a comprehensive transition system that provides three key elements, students are not only guided toward success in that transition, but in the ability to handle more significant transitions down the road.

Mary Beth Campbell

456

47 CFR 27.20 - Digital television transition education reports.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Digital television transition education reports. 27...Applications and Licenses § 27.20 Digital television transition education reports...the transition from analog broadcast television service to digital broadcast...

2010-10-01

457

47 CFR 27.20 - Digital television transition education reports.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Digital television transition education reports. 27...Applications and Licenses § 27.20 Digital television transition education reports...the transition from analog broadcast television service to digital broadcast...

2011-10-01

458

78 FR 46905 - Tobacco Transition Program; Final Assessment Procedures  

Federal Register 2010, 2011, 2012, 2013

...OF AGRICULTURE Commodity Credit Corporation Tobacco Transition Program; Final Assessment Procedures...about the final quarterly assessments for the Tobacco Transition Program (TTP). Through the Tobacco Transition Payment Program (TTPP),...

2013-08-02

459

19 CFR 123.31 - Merchandise in transit.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Merchandise in transit. 123.31 Section 123.31 Customs...WITH CANADA AND MEXICO Shipments in Transit Through the United States § 123.31 Merchandise in transit. (a) From one contiguous...

2010-04-01

460

48 CFR 52.247-57 - Transportation Transit Privilege Credits.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Transportation Transit Privilege Credits. 52.247-57 ...Clauses 52.247-57 Transportation Transit Privilege Credits. As prescribed...trade, that offerors may have potential transit credits available and the...

2010-10-01

461

9 CFR 104.6 - Products for transit shipment only.  

... 2014-01-01 false Products for transit shipment only. 104.6 Section 104...BIOLOGICAL PRODUCTS § 104.6 Products for transit shipment only. An application for a permit for Transit Shipment Only shall be required...

2014-01-01

462

49 CFR 1.51 - Delegations to Federal Transit Administrator.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Delegations to Federal Transit Administrator. 1.51 Section 1.51 ...Delegations § 1.51 Delegations to Federal Transit Administrator. The Federal Transit Administrator is delegated authority to...

2011-10-01

463

7 CFR 51.1309 - Condition after storage or transit.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 false Condition after storage or transit. 51.1309 Section 51.1309 Agriculture...Winter Pears 1 Condition After Storage Or Transit § 51.1309 Condition after storage or transit. Decay, scald or other...

2010-01-01

464

7 CFR 51.1309 - Condition after storage or transit.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 false Condition after storage or transit. 51.1309 Section 51.1309 Agriculture...Winter Pears 1 Condition After Storage Or Transit § 51.1309 Condition after storage or transit. Decay, scald or other...

2011-01-01

465

7 CFR 322.24 - Packaging of transit shipments.  

Code of Federal Regulations, 2012 CFR

... 2012-01-01 false Packaging of transit shipments. 322.24 Section 322...BYPRODUCTS, AND BEEKEEPING EQUIPMENT Transit of Restricted Organisms Through the United States § 322.24 Packaging of transit shipments. (a) Restricted...

2012-01-01

466

48 CFR 52.247-57 - Transportation Transit Privilege Credits.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Transportation Transit Privilege Credits. 52.247-57 ...Clauses 52.247-57 Transportation Transit Privilege Credits. As prescribed...trade, that offerors may have potential transit credits available and the...

2012-10-01

467

7 CFR 51.1309 - Condition after storage or transit.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 false Condition after storage or transit. 51.1309 Section 51.1309 Agriculture...Winter Pears 1 Condition After Storage Or Transit § 51.1309 Condition after storage or transit. Decay, scald or other...

2013-01-01

468

19 CFR 123.31 - Merchandise in transit.  

Code of Federal Regulations, 2012 CFR

...2012-04-01 false Merchandise in transit. 123.31 Section 123.31 Customs...WITH CANADA AND MEXICO Shipments in Transit Through the United States § 123.31 Merchandise in transit. (a) From one contiguous...

2012-04-01

469

7 CFR 51.1268 - Condition after storage or transit.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 false Condition after storage or transit. 51.1268 Section 51.1268 Agriculture...Fall Pears 1 Condition After Storage Or Transit § 51.1268 Condition after storage or transit. Decay, scald, or other...

2013-01-01

470

49 CFR 1.51 - Delegations to Federal Transit Administrator.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Delegations to Federal Transit Administrator. 1.51 Section 1.51 ...Delegations § 1.51 Delegations to Federal Transit Administrator. The Federal Transit Administrator is delegated authority to...

2010-10-01

471

7 CFR 51.1268 - Condition after storage or transit.  

...2014-01-01 false Condition after storage or transit. 51.1268 Section 51.1268 Agriculture...Fall Pears 1 Condition After Storage Or Transit § 51.1268 Condition after storage or transit. Decay, scald, or other...

2014-01-01

472

49 CFR 1.90 - The Federal Transit Administration.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 false The Federal Transit Administration. 1.90 Section 1...Administrations § 1.90 The Federal Transit Administration. Is responsible for...encouraging domestic manufacturing on transit projects through the enforcement of...

2012-10-01

473

19 CFR 123.31 - Merchandise in transit.  

...2014-04-01 false Merchandise in transit. 123.31 Section 123.31 Customs...WITH CANADA AND MEXICO Shipments in Transit Through the United States § 123.31 Merchandise in transit. (a) From one contiguous...

2014-04-01

474

9 CFR 104.6 - Products for transit shipment only.  

Code of Federal Regulations, 2013 CFR

... 2013-01-01 false Products for transit shipment only. 104.6 Section 104...BIOLOGICAL PRODUCTS § 104.6 Products for transit shipment only. An application for a permit for Transit Shipment Only shall be required...

2013-01-01

475

19 CFR 123.31 - Merchandise in transit.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Merchandise in transit. 123.31 Section 123.31 Customs...WITH CANADA AND MEXICO Shipments in Transit Through the United States § 123.31 Merchandise in transit. (a) From one contiguous...

2011-04-01

476

Matrix to Identify Candidate Rural Transit Livability Measures Performance Measure  

E-print Network

Matrix to Identify Candidate Rural Transit Livability Measures Performance Measure Restated? Ease of Calculation? Transit Can Influence Measure Directly? Helps Identify Deficiencies In Level Of Transit Service? Measure With Existing Planning Tools? Includes Needs Of Aging And Disabled Rural

477

48 CFR 52.247-57 - Transportation Transit Privilege Credits.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Transportation Transit Privilege Credits. 52.247-57 ...Clauses 52.247-57 Transportation Transit Privilege Credits. As prescribed...trade, that offerors may have potential transit credits available and the...

2011-10-01

478

49 CFR 1.90 - The Federal Transit Administration.  

Code of Federal Regulations, 2013 CFR

... 2013-10-01 false The Federal Transit Administration. 1.90 Section 1...Administrations § 1.90 The Federal Transit Administration. Is responsible for...encouraging domestic manufacturing on transit projects through the enforcement of...

2013-10-01

479

7 CFR 322.24 - Packaging of transit shipments.  

Code of Federal Regulations, 2010 CFR

... 2010-01-01 false Packaging of transit shipments. 322.24 Section 322...BYPRODUCTS, AND BEEKEEPING EQUIPMENT Transit of Restricted Organisms Through the United States § 322.24 Packaging of transit shipments. (a) Restricted...

2010-01-01

480

9 CFR 104.6 - Products for transit shipment only.  

Code of Federal Regulations, 2010 CFR

... 2010-01-01 false Products for transit shipment only. 104.6 Section 104...BIOLOGICAL PRODUCTS § 104.6 Products for transit shipment only. An application for a permit for Transit Shipment Only shall be required...

2010-01-01

481

7 CFR 51.1309 - Condition after storage or transit.  

...2014-01-01 false Condition after storage or transit. 51.1309 Section 51.1309 Agriculture...Winter Pears 1 Condition After Storage Or Transit § 51.1309 Condition after storage or transit. Decay, scald or other...

2014-01-01

482

9 CFR 104.6 - Products for transit shipment only.  

Code of Federal Regulations, 2012 CFR

... 2012-01-01 false Products for transit shipment only. 104.6 Section 104...BIOLOGICAL PRODUCTS § 104.6 Products for transit shipment only. An application for a permit for Transit Shipment Only shall be required...

2012-01-01

483

19 CFR 123.31 - Merchandise in transit.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Merchandise in transit. 123.31 Section 123.31 Customs...WITH CANADA AND MEXICO Shipments in Transit Through the United States § 123.31 Merchandise in transit. (a) From one contiguous...

2013-04-01

484

7 CFR 51.1309 - Condition after storage or transit.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 false Condition after storage or transit. 51.1309 Section 51.1309 Agriculture...Winter Pears 1 Condition After Storage Or Transit § 51.1309 Condition after storage or transit. Decay, scald or other...

2012-01-01

485

7 CFR 51.1268 - Condition after storage or transit.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 false Condition after storage or transit. 51.1268 Section 51.1268 Agriculture...Fall Pears 1 Condition After Storage Or Transit § 51.1268 Condition after storage or transit. Decay, scald, or other...

2012-01-01

486

7 CFR 322.24 - Packaging of transit shipments.  

... 2014-01-01 false Packaging of transit shipments. 322.24 Section 322...BYPRODUCTS, AND BEEKEEPING EQUIPMENT Transit of Restricted Organisms Through the United States § 322.24 Packaging of transit shipments. (a) Restricted...

2014-01-01

487

9 CFR 104.6 - Products for transit shipment only.  

Code of Federal Regulations, 2011 CFR

... 2011-01-01 false Products for transit shipment only. 104.6 Section 104...BIOLOGICAL PRODUCTS § 104.6 Products for transit shipment only. An application for a permit for Transit Shipment Only shall be required...

2011-01-01

488

48 CFR 52.247-57 - Transportation Transit Privilege Credits.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Transportation Transit Privilege Credits. 52.247-57 ...Clauses 52.247-57 Transportation Transit Privilege Credits. As prescribed...trade, that offerors may have potential transit credits available and the...

2013-10-01

489

7 CFR 322.24 - Packaging of transit shipments.  

Code of Federal Regulations, 2011 CFR

... 2011-01-01 false Packaging of transit shipments. 322.24 Section 322...BYPRODUCTS, AND BEEKEEPING EQUIPMENT Transit of Restricted Organisms Through the United States § 322.24 Packaging of transit shipments. (a) Restricted...

2011-01-01

490

7 CFR 322.24 - Packaging of transit shipments.  

Code of Federal Regulations, 2013 CFR

... 2013-01-01 false Packaging of transit shipments. 322.24 Section 322...BYPRODUCTS, AND BEEKEEPING EQUIPMENT Transit of Restricted Organisms Through the United States § 322.24 Packaging of transit shipments. (a) Restricted...

2013-01-01

491

21 CFR 26.5 - Length of transition period.  

Code of Federal Regulations, 2013 CFR

... 1 2013-04-01 2013-04-01 false Length of transition period. 26.5 Section 26...Pharmaceutical Good Manufacturing Practices § 26.5 Length of transition period. A 3-year transition period will start immediately...

2013-04-01

492

21 CFR 26.5 - Length of transition period.  

Code of Federal Regulations, 2011 CFR

... 1 2011-04-01 2011-04-01 false Length of transition period. 26.5 Section 26...Pharmaceutical Good Manufacturing Practices § 26.5 Length of transition period. A 3-year transition period will start immediately...

2011-04-01

493

21 CFR 26.5 - Length of transition period.  

Code of Federal Regulations, 2012 CFR

... 1 2012-04-01 2012-04-01 false Length of transition period. 26.5 Section 26...Pharmaceutical Good Manufacturing Practices § 26.5 Length of transition period. A 3-year transition period will start immediately...

2012-04-01

494

21 CFR 26.5 - Length of transition period.  

... 1 2014-04-01 2014-04-01 false Length of transition period. 26.5 Section 26...Pharmaceutical Good Manufacturing Practices § 26.5 Length of transition period. A 3-year transition period will start immediately...

2014-04-01

495

21 CFR 26.5 - Length of transition period.  

Code of Federal Regulations, 2010 CFR

... 1 2010-04-01 2010-04-01 false Length of transition period. 26.5 Section 26...Pharmaceutical Good Manufacturing Practices § 26.5 Length of transition period. A 3-year transition period will start immediately...

2010-04-01

496

Relationship Between Transit's Usual and Actual Mode Shares  

Microsoft Academic Search

One major source of transit mode share at the national level is the journey-to-work data from the U.S. Census Bureau’s Decennial Census surveys conducted since 1960. These data can be used to determine transit’s usual mode share, that is, the share of workers who state that they usually use transit for commuting. The relation of transit’s usual mode share to

Xuehao Chu; Steven E. Polzin

2008-01-01

497

A New Approach for Determining Onset of Transition  

NASA Technical Reports Server (NTRS)

The final report consists of three papers which outline and demonstrate the new method for determining transition onset. The procedure developed under this grant requires specification of the instability mechanism, i.e., Tollmien-Schlichting or crossflow, that leads to transition. The attached papers are entitled: 'An Alternative to the e(sup n) Method for Determining Onset of Transition', 'Transition Model for Swept Wing Flows', and 'A Transition Closure Model for Predicting Transition Onset'.

Hassan, H. A.; Warren, E. S.

1997-01-01

498

A stochastic model dissects cell states in biological transition processes  

E-print Network

Many biological processes, including differentiation, reprogramming, and disease transformations, involve transitions of cells through distinct states. Direct, unbiased investigation of cell states and their transitions ...

Armond, Jonathan W.

499

43 CFR 1610.8 - Transition period.  

Code of Federal Regulations, 2013 CFR

...Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR GENERAL MANAGEMENT (1000) PLANNING, PROGRAMMING, BUDGETING Resource Management Planning § 1610.8 Transition period. (a) Until superseded by resource...

2013-10-01

500

43 CFR 1610.8 - Transition period.  

Code of Federal Regulations, 2011 CFR

...Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR GENERAL MANAGEMENT (1000) PLANNING, PROGRAMMING, BUDGETING Resource Management Planning § 1610.8 Transition period. (a) Until superseded by resource...

2011-10-01