cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Contractible subgraphs and Morita equivalence of graph C*-algebras
Creators: name: Crisp, Tyrone
name: Gow, Daniel
Publisher: name: arXiv
Year: 2004
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L55

description: In this paper we describe an operation on directed graphs which produces a graph with fewer vertices, such that the C*-algebra of the new graph is Morita equivalent to that of the original graph. We unify and generalize several related constructions, notably delays and desingularizations of directed graphs.
description: 10 pages, uses XY-pic v3.7
Additional file 1 of ‘Too old to test?’: A life course approach to HIV-related risk and self-testing among midlife-older adults in Malawi
Creators: name: Johnson, Cheryl
name: Kumwenda, Moses
name: Meghji, Jamilah
name: Choko, Augustine T.
name: Mackwellings Phiri
name: Hatzold, Karin
name: Baggaley, Rachel
name: Taegtmeyer, Miriam
name: Terris-Prestholt, Fern
name: Desmond, Nicola
name: Corbett, Elizabeth L.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Neuroscience
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 1: Table S1. Detailed summary of participant quotes from focus group discussions and in-depth interviews across the life course.
Eutactic quantum codes
Creators: name: Svozil, Karl
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider sets of quantum observables corresponding to eutactic stars. Eutactic stars are systems of vectors which are the lower dimensional ``shadow'' image, the orthogonal view, of higher dimensional orthonormal bases. Although these vector systems are not comeasurable, they represent redundant coordinate bases with remarkable properties. One application is quantum secret sharing.
description: 6 pages
TAX AND INVESTMENT INCENTIVES IN THE DEVELOPING COUNTRIES: A CASE STUDY OF THE MANUFACTURING SECTOR OF MALAYSIA
Creators: name: Mohd Tahir, Abdullah Bin
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 38
subject: Economics

description: This study is an attempt to analyze the impact and effectiveness of tax and investment incentives on investment decisions in developing countries. The Malaysian experience is used as a case study. The importance of this study resides in the fact that nearly all developing countries have offered some form of tax and investment incentives to attract both domestic and foreign investments. Analysis of the effectiveness of these measures have been inadequate, and the results obtained have been ambiguous. This study can serve as an explanatory step toward a greater use of empirical tools for planning and executing more optimal and less wasteful investment incentive programs in developing countries. This study can also contribute to meeting the increasing demands for practical models in the literature on both public finance and development. The first step in this study is the formulation of an economic model of investment decisions. The model consists of a number of equations that are specified according to economic theory and, also, according to the way economic agents are believed to behave in the investment decision process. The second step entails the estimation and collection of data for each variable in the equations. The collection of data was done from both primary and secondary sources available in the various agencies of the Government of Malaysia. The final step was to apply the data obtained in "running" the model using simulation techniques. By identifying changes in the parameters and the important decision and policy variables of the model, we are able to make some important conclusions. Subsequently, we are also able to examine, first, the short-term impact and effectiveness of public policy in this area and, second, to understand structural changes in the manufacturing sector of the Malaysian economy over a longer period of time. The results of our study indicate that because of the multiplicity of incentives offered based on a discretionary and "case-by-case" method of approval, a number of biases and misallocations have resulted. Essentially, the incentives have created firm, sector, regional, and trade biases. Our results also indicate that shorter-duration projects with high capital intensities have been encouraged. This runs counter to the overall objectives of attaining stable, equitable, and continuous growth of employment through industrialization.
TAX AND INVESTMENT INCENTIVES IN THE DEVELOPING COUNTRIES: A CASE STUDY OF THE MANUFACTURING SECTOR OF MALAYSIA
Creators: name: Mohd Tahir, Abdullah Bin
Publisher: name: American University
Year: 2023

description: This study is an attempt to analyze the impact and effectiveness of tax and investment incentives on investment decisions in developing countries. The Malaysian experience is used as a case study. The importance of this study resides in the fact that nearly all developing countries have offered some form of tax and investment incentives to attract both domestic and foreign investments. Analysis of the effectiveness of these measures have been inadequate, and the results obtained have been ambiguous. This study can serve as an explanatory step toward a greater use of empirical tools for planning and executing more optimal and less wasteful investment incentive programs in developing countries. This study can also contribute to meeting the increasing demands for practical models in the literature on both public finance and development. The first step in this study is the formulation of an economic model of investment decisions. The model consists of a number of equations that are specified according to economic theory and, also, according to the way economic agents are believed to behave in the investment decision process. The second step entails the estimation and collection of data for each variable in the equations. The collection of data was done from both primary and secondary sources available in the various agencies of the Government of Malaysia. The final step was to apply the data obtained in "running" the model using simulation techniques. By identifying changes in the parameters and the important decision and policy variables of the model, we are able to make some important conclusions. Subsequently, we are also able to examine, first, the short-term impact and effectiveness of public policy in this area and, second, to understand structural changes in the manufacturing sector of the Malaysian economy over a longer period of time. The results of our study indicate that because of the multiplicity of incentives offered based on a discretionary and "case-by-case" method of approval, a number of biases and misallocations have resulted. Essentially, the incentives have created firm, sector, regional, and trade biases. Our results also indicate that shorter-duration projects with high capital intensities have been encouraged. This runs counter to the overall objectives of attaining stable, equitable, and continuous growth of employment through industrialization.
LEARNING DISABLED AND ACADEMICALLY UNDERPREPARED COMMUNITY COLLEGE STUDENTS: A COMPARISON OF TWO SAMPLES' USE OF AND PERCEIVED NEED FOR SELECTED COLLEGE-PROVIDED SERVICES (COUNSELING, HIGH-RISK)
Creators: name: Garies, Ruth Stoneburner
Publisher: name: American University
Year: 2023

description: Learning disabled and academically underprepared students need a broad range of support services to succeed in higher education. The purpose of this study was to compare samples of learning disabled and academically underprepared community college students, both to each other and to a sample of traditional students, in their reported use of and perceived need for selected college-provided support services. The Student Services Use and Needs Survey, Parts I and II, developed specifically for this research, assessed reported use of thirteen services and perceived need for eleven services. Three samples of community college students at one campus of a large, multi-campus, suburban community college completed the questionnaires: (a) fifty learning disabled students randomly selected from among those known to the college, (b) fifty students from randomly selected, developmental English classes, and (c) fifty students from randomly selected, freshman English classes. The results indicated that while the learning disabled students utilized a broad range of college support services, they tended to seek assistance primarily from one campus resource person, the Special Student Services Counselor. Although significantly more learning disabled students than traditional or academically underprepared students utilized eight of thirteen specified services, the learning disabled students perceived a significantly greater need for only three: tutoring in English, help in improving study skills, and help in making special arrangements. The academically underprepared students tended to underutilize the set of services and perceived little need for them. On the basis of study results, it was concluded: (a) the Special Student Services Counselor is critical to the success of learning disabled students at The Community College and he/she should emphasize development of the self-help skills needed by these students when they leave college, and (b) the academically underprepared students need to become more involved with campus sources of assistance. Specific recommendations for the community college studied were (a) preserve small, counselor-to-student ratios in programs serving learning disabled students, (b) designate a specific counselor for academically underprepared students to increase their contact with campus resources, and (c) provide tutoring within academic departments.
Additional file 8 of Burden of disease study of overweight and obesity; the societal impact in terms of cost-of-illness and health-related quality of life
Creators: name: Hecker, J.
name: Freijer, K.
name: Hiligsmann, M.
name: Evers, S. M. A. A.
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 8. Subgroup analysis of total societal costs.
Experimental Implementation of Quantum Walks on IBM Quantum Computers
Creators: name: Acasiete, Frank
name: Agostini, Flavia P.
name: Moqadam, Jalil Khatibi
name: Portugal, Renato
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The development of universal quantum computers has achieved remarkable success in recent years, culminating with the quantum supremacy reported by Google. Now is possible to implement short-depth quantum circuits with dozens of qubits and to obtain results with significant fidelity. Quantum walks are good candidates to be implemented on the available quantum computers. In this work, we implement discrete-time quantum walks with one and two interacting walkers on cycles, two-dimensional lattices, and complete graphs on IBM quantum computers. We are able to obtain meaningful results using the cycle, the two-dimensional lattice, and the complete graph with 16 nodes each, which require 4-qubit quantum circuits up to depth 100.
Dirty black holes: Quasinormal modes for "squeezed" horizons
Creators: name: Medved, A. J. M.
name: Martin, Damien
name: Visser, Matt
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the quasinormal modes for a class of black hole spacetimes that, informally speaking, contain a closely ``squeezed'' pair of horizons. (This scenario, where the relevant observer is presumed to be ``trapped'' between the horizons, is operationally distinct from near-extremal black holes with an external observer.) It is shown, by analytical means, that the spacing of the quasinormal frequencies equals the surface gravity at the squeezed horizons. Moreover, we can calculate the real part of these frequencies provided that the horizons are sufficiently close together (but not necessarily degenerate or even ``nearly degenerate''). The novelty of our analysis (which extends a model-specific treatment by Cardoso and Lemos) is that we consider ``dirty'' black holes; that is, the observable portion of the (static and spherically symmetric) spacetime is allowed to contain an arbitrary distribution of matter.
description: 15 pages, uses iopart.cls and setstack.sty V2: Two references added. Also, the appendix now relates our computation of the Regge-Wheeler potential for gravity in a generic "dirty" black hole to the results of Karlovini [gr-qc/0111066]
Fingerprinting the contribution of colored scalars to the $H^+ W^- Z(γ)$ vertex
Creators: name: Chakrabarty, Nabarun
name: Chakraborty, Indrani
name: Ghosh, Dilip Kumar
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Color-octet scalars arise in various Grand Unification scenarios and also in other models of new physics. They are also postulated for minimal flavour violation. Purely phenomenological imprints of such scalars are therefore worth looking at. Motivated by this, we perform a complete one-loop calculation of the $H^+ \to W^+ Z (\g)$ decay in a two Higgs doublet model augmented by a color-octet $SU(2)_L$ scalar doublet. The computation is conveniently segregated into colorless and colored components. The color-octet part of the amplitude, being scaled by the color-factor, provides an overall enhancement to the form factors. Crucial constraints from perturbative unitarity, positivity of the scalar potential, oblique parameters, Higgs signal strengths and direct search of a charged Higgs and color-octet scalars are folded-in into the analysis. Sensitivity of the loop-induced $H^+ \to W^+ Z (\g)$ vertex to other model parameters is elucidated. Finally, the prospect of observing a loop-induced $H^+ \to W^+ Z (\g)$ interaction at the future hadronic collisions is also discussed.
description: 27 pages (in 2 column format), 4 tables, 15 captioned figures. Version published in EPJC
The Universality of Seesaws
Creators: name: Peccei, R. D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I discuss how the ideas associated with Seesaws, first introduced in the context of neutrino masses, are generally useful for understanding the very disparate scales one encounters in particle physics. From this point of view, the energy scale characterizing the Universe's dark energy presents a real challenge. A natural Seesaw explanation for this scale ensues if one imagines tying the dark energy sector to the neutrino sector, but this idea requires bold new dynamics.
description: 7 pages. To appear in the Proceedings of the Fujihara Seminar "Neutrino Mass and Seesaw Mechanism", KEK 23-25 February", 2004. To be published in Nucl. Phys B (Proceedings Supplement)
title: Social factors affecting early developmental behaviour in laboratory mouse pups (Mus musculus)
Creators: name: Mitchell, Graham
Publisher: name: The Open University
Year: 1984

description: Experiments were conducted to establish the effect of litter size, maternal experience and the presence of the father on laboratory mouse development. Behaviour was recorded from day 3» at the earliest, to day 30» at the latest, with the minimum of disturbance to the subjects. Daily observations were made to establish the proportion of time the pups spent exhibiting certain activities. On day 30» open field tests were conducted and the pups* body weights were measured. The main experiment involved a 2 x 2 x 2 design so that the main effects of the three factors, and their interactions, could be assessed. Although all three factors influenced pup behaviour, paternal presence was the factor with the greatest number of significant main effects. Paternal presence had five main effects and litter size had four. Maternal experience had only one main effect, but was involved in all eight of the significant interactions. It was concluded that both the presence of the father and the small litter size increased the developmental rate of mouse pups, whereas maternal experience was involved in indirect effects. Two further experiments were conducted to investigate routes by which the father's effect might be operating. The Split Litter experiment exposed pups to the father, in the absence of the mother. The father displayed a range of care taking activities, very similar to the mother's, and the results and general observations indicated that the father was directly influencing offspring behaviour. The Split Gage experiment showed that the mother's caretaking behaviour was affected by the presence of the father and was associated with changed pup behaviour. It was concluded that the father affected pups directly, mainly by providing them with thermal insulation and tactile stimulation, and also affected them via a maternal mediation route by eliciting an increased display of maternal behaviour.
More on the Entropy Product and Dual CFTs
Creators: name: Golchin, Hanif
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we check the universality of the entropy product for some black hole and black ring solutions. Applying the asymptotic symmetry group (ASG) analysis, we also find the central charges of the dual CFTs for these solutions. It has been observed \cite{Chen:2013rb} that if the entropy product for a solution is universal, it is possible to read the central charges of the dual CFTs from the entropy product as $c_i \sim \frac{\partial}{\partial N_i}(S_+S_-)$, where $N_i$ is a conserved charge of the solution like angular momentum or electric charge. In this work, we consider some other families of solutions and we check that the same behavior is valid for them. Moreover, in the case of solutions containing the conical singularity, we find the central charges using the ASG analysis. We show that the central charges receive a contribution from the conical characteristic $κ$ of the solution, however it is still possible to read the central charges from the entropy product.
description: 18 pages, no figures. revised version, accepted by JHEP
A global version of Gunther's polysymplectic formalism using vertical projections
Creators: name: McClain, Tom
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: I construct a global version of the local polysymplectic approach to covariant Hamiltonian field theory pioneered by C. Gunther. Beginning with the geometric framework of the theory, I specialize to vertical vector fields to construct the (poly)symplectic structures, derive Hamilton's field equations, and construct a more-or-less natural Poisson bracket. I then examine a few key examples to determine the nature of the necessary vertical projections and find that the theory provides the geometric analog of the canonical transformation approach to covariant Hamiltonian field theory advanced by Struckmeier and Redelbach. I conclude with a few remarks about possible applications of this framework to the geometric quantization of classical field theories.
description: 25 pages
LEARNING DISABLED AND ACADEMICALLY UNDERPREPARED COMMUNITY COLLEGE STUDENTS: A COMPARISON OF TWO SAMPLES' USE OF AND PERCEIVED NEED FOR SELECTED COLLEGE-PROVIDED SERVICES (COUNSELING, HIGH-RISK)
Creators: name: Garies, Ruth Stoneburner
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 3903
subject: Education systems

description: Learning disabled and academically underprepared students need a broad range of support services to succeed in higher education. The purpose of this study was to compare samples of learning disabled and academically underprepared community college students, both to each other and to a sample of traditional students, in their reported use of and perceived need for selected college-provided support services. The Student Services Use and Needs Survey, Parts I and II, developed specifically for this research, assessed reported use of thirteen services and perceived need for eleven services. Three samples of community college students at one campus of a large, multi-campus, suburban community college completed the questionnaires: (a) fifty learning disabled students randomly selected from among those known to the college, (b) fifty students from randomly selected, developmental English classes, and (c) fifty students from randomly selected, freshman English classes. The results indicated that while the learning disabled students utilized a broad range of college support services, they tended to seek assistance primarily from one campus resource person, the Special Student Services Counselor. Although significantly more learning disabled students than traditional or academically underprepared students utilized eight of thirteen specified services, the learning disabled students perceived a significantly greater need for only three: tutoring in English, help in improving study skills, and help in making special arrangements. The academically underprepared students tended to underutilize the set of services and perceived little need for them. On the basis of study results, it was concluded: (a) the Special Student Services Counselor is critical to the success of learning disabled students at The Community College and he/she should emphasize development of the self-help skills needed by these students when they leave college, and (b) the academically underprepared students need to become more involved with campus sources of assistance. Specific recommendations for the community college studied were (a) preserve small, counselor-to-student ratios in programs serving learning disabled students, (b) designate a specific counselor for academically underprepared students to increase their contact with campus resources, and (c) provide tutoring within academic departments.
AN ANALYSIS OF THE PERCEPTIONS OF STATE DIRECTORS OF SPECIAL EDUCATION AND SELF-DIRECTED PARENT LEADERS ON THE IMPLEMENTATION OF DUE PROCESS REGULATIONS FOR THE HANDICAPPED (PROCEDURAL SAFEGUARDS)
Creators: name: Norris, Edward Gustavis
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 3904
subject: Specialist studies in education

description: Statement of the Problem. The purposes of this study were: (1) to survey opinions of two select groups on state and local implementation of procedural safeguards for handicapped children and youth, and (2) to compare these opinions through use of chi square analyses. Procedure. This study involved a survey of State Directors of Special Education (State Directors) and Self-Directed Parent Leaders (Parent Leaders) concerning implementation of procedural safeguards for the handicapped. To determine differences in the responses of State Directors and Parent Leaders, chi square analyses were used. Each chi square result was compared at the .05 level of significance to determine a statistical difference. The survey research design associated with this study involved the use of a twenty-four item survey instrument to elicit responses from State Directors and Parent Leaders on issues concerning procedural safeguards for the handicapped. Results. Findings of this study indicated that there were no significant differences of opinion between State Directors and Parent Leaders concerning factors associated with the implementation of procedural safeguards. Responses of State Directors and Parent Leaders indicated that there were difficulties at the state and local level concerning parent access to mediation, parent access to information about their rights, and the degree of knowledge that professionals have relative to procedural safeguards for the handicapped. Conclusions. Chi square analyses of responses indicated that there were no significant differences between the opinions of the two groups regarding factors concerning the implementation of procedural safeguards for the handicapped.
Additional file 1 of Validation of a search strategy for randomized clinical trials related to periodontitis
Creators: name: Lyrio, Amanda Oliveira
name: Da Cruz, Simone Seixas
name: Gomes-Filho, Isaac Suzart
name: Silveira, Viviane Seixas Silva
name: Elivan Silva Souza
name: Josicélia Estrela Tuy Batista
name: Figueiredo, Ana Claudia Morais Godoy
name: Pereira, Mauricio Gomes
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer

description: Additional file 1 Appendix A. Peer Review of Electronic Search Strategies (PRESS). Appendix B. PubMed search history (11/16/2018).
AN ANALYSIS OF THE PERCEPTIONS OF STATE DIRECTORS OF SPECIAL EDUCATION AND SELF-DIRECTED PARENT LEADERS ON THE IMPLEMENTATION OF DUE PROCESS REGULATIONS FOR THE HANDICAPPED (PROCEDURAL SAFEGUARDS)
Creators: name: Norris, Edward Gustavis
Publisher: name: American University
Year: 2023

description: Statement of the Problem. The purposes of this study were: (1) to survey opinions of two select groups on state and local implementation of procedural safeguards for handicapped children and youth, and (2) to compare these opinions through use of chi square analyses. Procedure. This study involved a survey of State Directors of Special Education (State Directors) and Self-Directed Parent Leaders (Parent Leaders) concerning implementation of procedural safeguards for the handicapped. To determine differences in the responses of State Directors and Parent Leaders, chi square analyses were used. Each chi square result was compared at the .05 level of significance to determine a statistical difference. The survey research design associated with this study involved the use of a twenty-four item survey instrument to elicit responses from State Directors and Parent Leaders on issues concerning procedural safeguards for the handicapped. Results. Findings of this study indicated that there were no significant differences of opinion between State Directors and Parent Leaders concerning factors associated with the implementation of procedural safeguards. Responses of State Directors and Parent Leaders indicated that there were difficulties at the state and local level concerning parent access to mediation, parent access to information about their rights, and the degree of knowledge that professionals have relative to procedural safeguards for the handicapped. Conclusions. Chi square analyses of responses indicated that there were no significant differences between the opinions of the two groups regarding factors concerning the implementation of procedural safeguards for the handicapped.
Simple criteria for projective measurements with linear optics
Creators: name: van Loock, Peter
name: Lütkenhaus, Norbert
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive a set of criteria to decide whether a given projection measurement can be, in principle, exactly implemented solely by means of linear optics. The derivation can be adapted to various detection methods, including photon counting and homodyne detection. These criteria enable one to obtain easily No-Go theorems for the exact distinguishability of orthogonal quantum states with linear optics including the use of auxiliary photons and conditional dynamics.
description: final published version
An investigation into eco-friendly office supplies : pencils and mechanical
Creators: name: Davydovski, Anton
name: Jiang, Jacky
name: Vishwakarma, Saurabh
name: Leung, Vincent
Publisher: name: The University of British Columbia
Year: 2015

description: The goal of the Eco-Friendly Office Supplies SEEDS project was to investigate manufacturer’s claims of “eco-friendliness” and perform a Triple Bottom Line analysis on a handful of products to determine whether purchasing the eco-friendly alternatives was worthwhile. The scope of our team’s project was limited to pencils, and we chose to explore this by comparing 5 different brands of pencil, representing 4 different types of pencil: wooden, ecofriendly wooden, mechanical, and eco-friendly mechanical. By looking at environmental, social, and economic metrics, and assigning each pencil a numerical value for each metric, we were able to come up with an objective score for each pencil. In the end, we came to the conclusion that the Staedtler Wopex, a German-manufactured eco-friendly wooden pencil, was a good eco-friendly alternative and the best overall pencil, while the ForestChoice, another type of eco-friendly pencil, did not live up to its eco-friendly claims. In the mechanical pencil category, the eco-friendly claims of the Zebra Eco Jimnie were difficult to verify, but did not offset its severely increased price point regardless of that fact. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Observation of nonlinear spin dynamics and squeezing in a BEC using dynamic decoupling
Creators: name: Edri, Hagai
name: Raz, Boaz
name: Fleurov, Gavriel
name: Ozeri, Roee
name: Davidson, Nir
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We study the evolution of a Bose-Einstein Condensate (BEC) in a two-state superposition due to inter-state interactions. Using a population imbalanced dynamic decoupling scheme, we measure inter-state interactions while canceling intra-state density shifts and external noise sources. Our measurements show low statistical uncertainties for both magnetic sensitive and insensitive superpositions, indicating that we successfully decoupled our system from strong magnetic noises. We experimentally show that the Bloch sphere representing general superposition states is "twisted" by inter-state interactions, and that the twist rate depends on the difference between inter-state and intra-state scattering lengths $a_{22}+a_{11}-2a_{12}$. We use the non-linear spin dynamics in our scheme to demonstrate squeezing of gaussian noise, showing $2.79 \pm 0.43$ dB squeezing when starting with a noisy state and applying 160 echo pulses. Which can be used to increase sensitivity when there are errors in state preparation. Our results allow for a better understanding of inter-atomic potentials in \textsuperscript{87}Rb. Our scheme can be used for spin squeezing beyond the standard quantum limit and observing polaron physics close to a Feshbach resonance, where interactions diverge, and strong magnetic noises are ever present.
A comparison of exoplanet spectroscopic retrieval tools
Creators: name: Barstow, Joanna K.
name: Changeat, Quentin
name: Garland, Ryan
name: Line, Michael R.
name: Rocchetto, Marco
name: Waldmann, Ingo P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Over the last several years, spectroscopic observations of transiting exoplanets have begun to uncover information about their atmospheres, including atmospheric composition and indications of the presence of clouds and hazes. Spectral retrieval is the leading technique for interpretation of transmission spectra and is employed by several teams using a variety of forward models and parameter estimation algorithms. However, different model suites have mostly been used in isolation and so it is unknown whether the results from each are comparable. As we approach the launch of the James Webb Space Telescope we anticipate advances in wavelength coverage, precision, and resolution of transit spectroscopic data, so it is important that the tools that will be used to interpret these information rich spectra are validated. To this end, we present an inter-model comparison of three retrieval suites: TauREx, NEMESIS and CHIMERA. We demonstrate that the forward model spectra are in good agreement (residual deviations on the order of 20 - 40 ppm), and discuss the results of cross retrievals between the three tools. Generally, the constraints from the cross retrievals are consistent with each other and with input values to within 1 sigma However, for high precision scenarios with error envelopes of order 30 ppm, subtle differences in the simulated spectra result in discrepancies between the different retrieval suites, and inaccuracies in retrieved values of several sigma. This can be considered analogous to substantial systematic/astrophysical noise in a real observation, or errors/omissions in a forward model such as molecular linelist incompleteness or missing absorbers.
description: 25 pages, 21 figures. Accepted in MNRAS
A STUDY OF MAJOR ISSUES, ALTERNATIVES, AND SOLUTIONS FACING SPECIAL SCHOOLS FOR THE FINE ARTS USING A DELPHI METHOD FOR INVESTIGATION (ADMINISTRATION, DANCE, SECONDARY, MUSIC, DRAMA)
Creators: name: Daniel, Ronald Overton
Publisher: name: American University
Year: 2023

description: High schools specialized in intensive arts training increased from fewer than 15 in 1976 to more than 80 in 1984. This form of secondary education has a significant impact upon the training of young artists. Before this study, very few researchers had focused their attention on special schools for the arts. Few people knew how many schools existed, how they functioned, what their problems were, or how they handled them. Since there was little empirical literature on high school arts education, this study employed a Delphi technique to discover the current situation of special arts schools. The chief administrators of all known arts school in the country were contacted and given the opportunity to participate. Approximately 45 percent of the administrators participated in the study, representing every geographic area and every demographic variable. The Delphi technique used a series of questionnaires with feedback in which participants saw the responses made by others, reassessed their responses, and argued in favor of or against a particular item. Included in Chapter II are descriptive analyses of special arts schools representative of full-day schools, half-day schools, residential schools, specialized arts schools, and public and private schools. The primary objective of this research was to define the major issues facing special arts schools in the United States and to determine the most effective means of dealing with the issues. The Delphi study provided the opportunity for a national dialogue among arts administrators. The first step of the Delphi process revealed 36 issues that were major concerns of arts administrators. The second step forced a ranking of the issues, which determined the six most significant issues: student recruitment, basic education, traditional school personnel's jealousy, high-quality arts instruction, strong academic programs, and outstanding teaching facilities. In the final step of the Delphi study, administrators discussed the ways they dealt with each of the six issues. The resulting information should be valuable in many aspects of arts school planning.
Enhancing campus transportation monitoring
Creators: name: Stonham, David
Publisher: name: The University of British Columbia
Year: 2015

description: The University of British Columbia (UBC) has been monitoring transportation to and from their Vancouver Point Grey campus since 1997. The data collected has been used to inform planning decisions such as land use and transportation planning decisions. 1 In October 2014, UBC Campus and Community Planning published a new Transportation Plan for their Vancouver Campus to consolidate and update existing plans such as the 2005 Strategic Transportation Plan. The 2014 Transportation Plan identifies the need for, and commits to developing, a “comprehensive” on-campus transportation monitoring system. Until now, Campus and Community Planning has been reliant on surveys of the campus population to approximate on-campus mobility patterns. Under the guidance of Campus and Community Planning, through the Social Environmental Economic Development Studies Program, and with funding from the Alma Mater Society’s Sustainability Projects Fund, I conducted a pilot study using Global Positioning System (GPS) data loggers to monitor on-campus transportation patterns. By completing this pilot study, I am able to make recommendations to UBC Campus and Community Planning on the feasibility of using GPS technology for on-campus transportation monitoring. The week-long pilot study, consisting of 10 participants, has collected sufficient data to show the positive and negative aspects of the technology. While I have not conducted the pilot study in a statistically representative manner, some abstractions can still be made from the data that I have collected. This report concludes with a recommendation that GPS technology does indeed have a place in a comprehensive on-campus transportation monitoring system at UBC’s Vancouver campus. I make several cautions as to the fine scale accuracy of the technology and the ease of working with the data, but show that the end product still has the level of detail necessary to inform planning decisions. Finally, I note that the implementation of an exciting new technology such as GPS catches people’s attention, which in turn could lead to increased public engagement in sustainability and transportation planning, if the message is well presented. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Extension of the HF program to partially filled f-subshells
Creators: name: Gaigalas, G.
name: Fischer, C. Froese
Publisher: name: arXiv
Year: 2004
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: A new version of a Hartree-Fock program is presented that includes extensions for partially filled f-subshells. The program allows the calculation of term dependent Hartree-Fock orbitals and energies in LS coupling for configurations with no more than two open subshells, including f-subshells.
Entanglement dynamics in chaotic systems
Creators: name: Ghose, Shohini
name: Sanders, Barry C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study quantum chaos for systems with more than one degree of freedom, for which we present an analysis of the dynamics of entanglement. Our analysis explains the main features of entanglement dynamics and identifies entanglement-based signatures of quantum chaos. We discuss entanglement dynamics for a feasible experiment involving an atom in a magneto-optical trap and compare the results with entanglement dynamics for the well-studied quantum kicked top.
description: 4 pages, 6 figures
Instantaneous Measurement of Velocity Fields in Developed Thermal Turbulence in Mercury
Creators: name: Mashiko, T.
name: Tsuji, Y.
name: Mizuno, T.
name: Sano, M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Using ultrasonic velocimetry we measured the vertical profile of the velocity fluctuation in high Rayleigh number thermal convection in a cell with aspect ratio of 0.5, filled with a low Prandtl number fluid, mercury. Intriguing fluctuating dynamics of the mean flow and universal nature of the kinetic energy cascade are elucidated utilizing spectral decomposition and reconstruction. Scaling properties of the structure functions and the energy spectrum are directly calculated without the use of Taylor's frozen-flow hypothesis for the first time. Despite the complex nature of the mean flow, it is found that the energy cascade process exhibits universal laws in thermal turbulence.
description: 4 pages, 5 figures
Variational Learning of Individual Survival Distributions
Creators: name: Xiu, Zidi
name: Tao, Chenyang
name: Goldstein, Benjamin A.
name: Henao, Ricardo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: The abundance of modern health data provides many opportunities for the use of machine learning techniques to build better statistical models to improve clinical decision making. Predicting time-to-event distributions, also known as survival analysis, plays a key role in many clinical applications. We introduce a variational time-to-event prediction model, named Variational Survival Inference (VSI), which builds upon recent advances in distribution learning techniques and deep neural networks. VSI addresses the challenges of non-parametric distribution estimation by ($i$) relaxing the restrictive modeling assumptions made in classical models, and ($ii$) efficiently handling the censored observations, {\it i.e.}, events that occur outside the observation window, all within the variational framework. To validate the effectiveness of our approach, an extensive set of experiments on both synthetic and real-world datasets is carried out, showing improved performance relative to competing solutions.
Additional file 2 of Age and sex are associated with the plasma lipidome: findings from the GOLDN study
Creators: name: Slade, Emily
name: Irvin, Marguerite R.
name: Xie, Kevin
name: Arnett, Donna K.
name: Claas, Steven A.
name: Kind, Tobias
name: Fardo, David W.
name: Graf, Gregory A.
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Biotechnology
subject: Cancer
subject: Computational Biology

description: Additional file 2. Correlation between total class intensities.
Resonance libration and width at arbitrary inclination
Creators: name: Namouni, Fathi
name: Morais, Helena
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We apply the analytical disturbing function for arbitrary inclination derived in our previous work to characterize resonant width and libration of mean motion resonances at arbitrary inclination obtained from direct numerical simulations of the three-body problem. We examine the 2:1 and 3:1 inner Jupiter and 1:2 and 1:3 outer Neptune resonances and their possible asymmetric librations using a new analytical pendulum model of resonance that includes the simultaneous libration of multiple arguments and their second harmonics. The numerically-derived resonance separatrices are obtained using the Mean Exponential Growth factor of Nearby Orbits (MEGNO chaos indicator). We find that the analytical and numerical estimates are in agreement and that resonance width is determined by the first few fundamental resonance modes that librate simultaneously on the resonant timescale. Our results demonstrate that the new pendulum model may be used to ascertain resonance width analytically, and more generally, that the disturbing function for arbitrary inclination is a powerful analytical tool that describes resonance dynamics of low as well as high inclination asteroids in the solar system.
description: Typos and figure placement corrected
A STUDY OF MAJOR ISSUES, ALTERNATIVES, AND SOLUTIONS FACING SPECIAL SCHOOLS FOR THE FINE ARTS USING A DELPHI METHOD FOR INVESTIGATION (ADMINISTRATION, DANCE, SECONDARY, MUSIC, DRAMA)
Creators: name: Daniel, Ronald Overton
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 3904
subject: Specialist studies in education

description: High schools specialized in intensive arts training increased from fewer than 15 in 1976 to more than 80 in 1984. This form of secondary education has a significant impact upon the training of young artists. Before this study, very few researchers had focused their attention on special schools for the arts. Few people knew how many schools existed, how they functioned, what their problems were, or how they handled them. Since there was little empirical literature on high school arts education, this study employed a Delphi technique to discover the current situation of special arts schools. The chief administrators of all known arts school in the country were contacted and given the opportunity to participate. Approximately 45 percent of the administrators participated in the study, representing every geographic area and every demographic variable. The Delphi technique used a series of questionnaires with feedback in which participants saw the responses made by others, reassessed their responses, and argued in favor of or against a particular item. Included in Chapter II are descriptive analyses of special arts schools representative of full-day schools, half-day schools, residential schools, specialized arts schools, and public and private schools. The primary objective of this research was to define the major issues facing special arts schools in the United States and to determine the most effective means of dealing with the issues. The Delphi study provided the opportunity for a national dialogue among arts administrators. The first step of the Delphi process revealed 36 issues that were major concerns of arts administrators. The second step forced a ranking of the issues, which determined the six most significant issues: student recruitment, basic education, traditional school personnel's jealousy, high-quality arts instruction, strong academic programs, and outstanding teaching facilities. In the final step of the Delphi study, administrators discussed the ways they dealt with each of the six issues. The resulting information should be valuable in many aspects of arts school planning.
Additional file 3 of Age and sex are associated with the plasma lipidome: findings from the GOLDN study
Creators: name: Slade, Emily
name: Irvin, Marguerite R.
name: Xie, Kevin
name: Arnett, Donna K.
name: Claas, Steven A.
name: Kind, Tobias
name: Fardo, David W.
name: Graf, Gregory A.
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Biotechnology
subject: Cancer
subject: Computational Biology

description: Additional file 3. Diagnostic plots for regression models of lipid classes and subclasses.