cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Stacking catalog sources in WMAP data
Creators: name: Schultz, Kasey W.
name: Huffenberger, Kevin M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We stack WMAP 7-year temperature data around extragalactic point sources, showing that the profiles are consistent with WMAP's beam models, in disagreement with the findings of Sawangwit & Shanks (2010). These results require that the source sample's selection is not biased by CMB fluctuations. We compare profiles from sources in the standard WMAP catalog, the WMAP catalog selected from a CMB-free combination of data, and the NVSS catalog, and quantify the agreement with fits to simple parametric beam models. We estimate the biases in source profiles due to alignments with positive CMB fluctuations, finding them roughly consistent with those biases found with the WMAP standard catalog. Addressing those biases, we find source spectral indices significantly steeper than those used by WMAP, with strong evidence for spectral steepening above 61 GHz. Such changes modify the power spectrum correction required for unresolved point sources, and tend to weaken somewhat the evidence for deviation from a Harrison-Zel'dovich primordial spectrum, but more analysis is required. Finally, we discuss implications for current CMB experiments.
description: 10 pages, 7 figures, 2 tables, submitted to MNRAS
Health Needs Assessment for Kisumu, Kenya
Creators: name: Maoulidi, Moumie
Publisher: name: Columbia University
Year: 2011
Subjects: Africans
Regional planning
Public health

description: Kisumu, the capital of Nyanza Province in western Kenya, was designated as a Millennium City by the Earth Institute at Columbia University in 2006. The city is struggling to reduce high maternal and child mortality rates and faces numerous other health challenges, including high rates of malaria and HIV prevalence, lack of qualified health workers and a dilapidated health infrastructure. Poor access to health services, clean water and sanitation facilities also contributes to the high burden of ill-health in the city.
Colorado water, June/July 2011
Creators: name: Knebel, Lindsey A.
name: Colorado Water Institute, Publisher
Publisher: name: Mountain Scholar
Year: 2011
Subjects: subject: Water resources development -- Colorado
subject: Water use -- Colorado
subject: Water-supply -- Colorado
subject: Water-supply -- Management -- Colorado

description: The newsletter is devoted to enhancing communication between Colorado water users and managers and faculty at the state's research universities.
description: Newsletter of the Water Center of Colorado State University. Theme: Invasive species.
Implicit ladder summation in the Hartree-Fock-Bogoliubov approach
Creators: name: Pricoupenko, Ludovic
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The fully variational Hartree Fock Bogoliubov approach for bosons is studied in the limit of zero range forces in two- and three-dimensions. The equation of state obtained in two-dimensions is expressed in a parametric form. It is shown that the $Λ$ potential permits to perform an implicit summation of the ladder diagrams without leaving the variational scheme, restoring thus the consistency of this approximation.
Breaking Pseudo-Rotational Symmetry through ${\bf H}^2_+$ Metric Deformation in the Eckart Potential Problem
Creators: name: Leija-Martinez, Nehemias
name: Alvarez-Castillo, David Edwin
name: Kirchbach, Mariana
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The peculiarity of the Eckart potential problem on ${\bf H}^2_+$ (the upper sheet of the two-sheeted two-dimensional hyperboloid), to preserve the $(2l+1)$-fold degeneracy of the states typical for the geodesic motion there, is usually explained in casting the respective Hamiltonian in terms of the Casimir invariant of an so(2,1) algebra, referred to as potential algebra. In general, there are many possible similarity transformations of the symmetry algebras of the free motions on curved surfaces towards potential algebras, which are not all necessarily unitary. In the literature, a transformation of the symmetry algebra of the geodesic motion on ${\bf H}^2_+$ towards the potential algebra of Eckart's Hamiltonian has been constructed for the prime purpose to prove that the Eckart interaction belongs to the class of Natanzon potentials. We here take a different path and search for a transformation which connects the $(2l+1)$ dimensional representation space of the pseudo-rotational so(2,1) algebra, spanned by the rank-$l$ pseudo-spherical harmonics, to the representation space of equal dimension of the potential algebra and find a transformation of the scaling type. Our case is that in so doing one is producing a deformed isometry copy to ${\bf H}^2_+$ such that the free motion on the copy is equivalent to a motion on ${\bf H}^2_+$, perturbed by a $\coth$ interaction. In this way, we link the so(2,1) potential algebra concept of the Eckart Hamiltonian to a subtle type of pseudo-rotational symmetry breaking through ${\bf H}^2_+$ metric deformation.
description: misprints are corrected
Supplementary document for Metasurface-based perfect vortex beams with trigonometric-function topological charge for OAM manipulation - 6373797.pdf
Creators: name: Zhang, Bolun
name: Hu, Zhengda
name: Wu, Jingjing
name: Wang, Jicheng
name: Nie, Yanguang
name: Zhang, Feng
name: Li, Mengmeng
name: Khakhomov, Sergei
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Final Supplemental Document
Health Needs Assessment for the City of Ségou, Mali
Creators: name: Hoy, Rachel
name: Sidibé, Abdoulaye
Publisher: name: Columbia University
Year: 2010
Subjects: Regional planning
Public health

description: In 2007, the Earth Institute at Columbia University selected Ségou, the capital city of Ségou region in Mali, to become one of what were then seven Millennium Cities. This designation has galvanized local and international parties to devise sustainable strategies aimed at reducing poverty and supporting economic development. The city of Ségou is actively working towards achieving the health-related Millennium Development Goals (MDGs) by 2015: reducing child mortality (MDG 4); improving maternal health (MDG 5); and combating HIV/AIDS, malaria and other diseases (MDG 6). This needs assessment finds that Ségou has made progress in achieving these Goals. Noteworthy achievements made by Urban Ségou include: providing free antenatal care to all pregnant women; the successful implementation of an immunization campaign for children; and low HIV prevalence rates, due in part to effective voluntary counseling and testing (VCT) at all health facility levels in Ségou.
The H.E.S.S. extragalactic sky
Creators: name: Raue, Martin
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The H.E.S.S. Cherenkov telescope array, located on the southern hemisphere in Namibia, studies very high energy (VHE; E>100 GeV) gamma-ray emission from astrophysical objects. During its successful operations since 2002 more than 80 galactic and extra-galactic gamma-ray sources have been discovered. H.E.S.S. devotes over 400 hours of observation time per year to the observation of extra-galactic sources resulting in the discovery of several new sources, mostly AGNs, and in exciting physics results e.g. the discovery of very rapid variability during extreme flux outbursts of PKS 2155-304, stringent limits on the density of the extragalactic background light (EBL) in the near-infrared derived from the energy spectra of distant sources, or the discovery of short-term variability in the VHE emission from the radio galaxy M 87. With the recent launch of the Fermi satellite in 2008 new insights into the physics of AGNs at GeV energies emerged, leading to the discovery of several new extragalactic VHE sources. Multi-wavelength observations prove to be a powerful tool to investigate the production mechanism for VHE emission in AGNs. Here, new results from H.E.S.S. observations of extragalactic sources will be presented and their implications for the physics of these sources will be discussed.
description: 8 pages, 6 figures, invited review talk, in the proceedings of the "International Workshop on Beamed and Unbeamed Gamma-Rays from Galaxies" 11-15 April 2011, Lapland Hotel Olos, Muonio, Finland, Journal of Physics: Conference Series Volume 355, 2012
pCubee : evaluation of a tangible outward-facing geometric display
Creators: name: Lam, Billy Shiu Fai
Publisher: name: University of British Columbia
Year: 2011

description: This thesis describes the evaluation of pCubee, a handheld outward-facing geometric display that supports high-quality visualization and tangible interaction with 3D content. Through reviewing existing literatures on 3D display technologies, we identified and examined important areas that have yet to be fully understood for outward-facing geometric displays. We investigated the performance of a dynamic visual calibration technique to compensate for tracking errors, and we demonstrated four novel interaction schemes afforded by tangible outward-facing geometric displays, including static content visualization, dynamic interaction with reactive virtual objects, scene navigation through display movements, and bimanual interaction. Two experiments were conducted to evaluate the impact of display seams and pCubee's potential in spatial reasoning tasks respectively. Two stimuli, a path-tracing visualization task and a 3D cube comparison task that was similar to a mental rotation task, were utilized in the experiments. In the first experiment, we discovered a significant effect on user performance in path-tracing that was dependent on the seam thickness. As seam size increased beyond a thickness threshold, subjects relied less on multiple screens and spent longer time to trace paths. In the second experiment, we found that subjects had significant preference for using the pCubee display compared to a desktop display setup when solving our cube comparison problem. Both time and accuracy using pCubee were as good as using a much larger, more familiar desktop display. This proved the utility of outward-facing geometric displays for spatial reasoning tasks. Our analysis and evaluation identified promising potential but current limitations of pCubee. The outcomes from our analysis can help to facilitate development and more systematic evaluations of similar displays in the future.
Partner Choice and the Marital College Premium
Creators: name: Chiappori, Pierre A.
name: Salanie, Bernard
name: Weiss, Yoram
Publisher: name: Columbia University
Year: 2011
Subjects: Economics
Education

description: Several theoretical contributions have argued that the returns to schooling within marriage play a crucial role for human capital investments. Our paper quantifies the evolution of these returns over the last decades. We consider a frictionless matching framework á la Becker-Shapley-Shubik, in which the gain generated by a match between two individuals is the sum of a systematic effect that only depends on the spouses' education classes and a match-specific term that we treat as random; following Choo and Siow (2006), we assume the latter component has an additively separable structure. We derive a complete, theoretical characterization of the model. We show that if the supermodularity of the surplus function is invariant over time and errors have extreme value distributions with time-invariant but education-dependent variances, the model is overidentified. We apply our method to US data on individuals born between 1943 and 1972. Our model fits the data very closely; moreover, we find that the deterministic part of the surplus is indeed supermodular and that, in line with theoretical predictions, the "marital college premium" has increased for women but not for men over the period.
Colorado water, December 2002
Creators: name: Flanagan, Marian
name: Blackledge, Michael
name: Miller, Shirley
name: Colorado Water Resources Research Institute, Publisher
Publisher: name: Mountain Scholar
Year: 2002
Subjects: subject: Water resources development -- Colorado
subject: Water use -- Colorado
subject: Water-supply -- Colorado
subject: Water-supply -- Management -- Colorado

description: The scope of the newsletter is devoted to enhancing communication between Colorado water users and managers and faculty at the research universities in the state.
description: Numbering on piece, vol. 18 is incorrect.
description: Newsletter of the Water Center at Colorado State University.
Outward FDI from Poland and its policy context, 2011
Creators: name: Zimny, Zbigniew
Publisher: name: Columbia University
Year: 2011
Subjects: Finance
Economics

description: During the transition toward a market economy, for many years Poland's outward foreign direct investment (OFDI) was small and limited to trade-supporting activities in key export markets. It took off and started growing rapidly only five or six years ago, when the Polish private sector had matured enough to start generating homegrown multinational enterprises (MNEs). Some state-owned enterprises (SOEs) began also investing abroad, sometimes with the Government's encouragement. By contrast, in terms of private companies, Poland adopted a laissez-faire policy, leaving the emergence and expansion of private MNEs to market forces. In addition, Poland became a source and a transit country for large cross-border flows of funds among units of foreign and Polish firms, classified as FDI flows, artificially inflating OFDI. In the first year of the worldwide financial and economic crisis (2008) OFDI flows declined rather modestly to start growing again in 2009 and 2010 due to a relatively good performance of the Polish economy during the crisis.
Outward FDI in Austria and its policy context, 2010
Creators: name: Mayer, Susanne
name: Bellak, Christian
Publisher: name: Columbia University
Year: 2010
Subjects: Finance
Economics

description: As a latecomer in outward FDI (OFDI), Austria's firms were mostly export-oriented until the mid-1990s. When Austria joined the European Union (EU) in 1995 OFDI started to grow. This process was further stimulated by the effects of the opening up of Eastern European markets. Austria's OFDI stock revealed positive growth rates ever since the 1990s. Still in 2008, Austria's OFDI flows recorded their second largest value in history and pushed the small Austrian economy among the 20 largest foreign investors globally. Yet, a substantial change occurred in 2008, when the growth of its OFDI stock stopped -- mainly due to valuation adjustments in the aftermath of the crisis. Austrian economic policy is conducive to FDI in general and recently the Austrian tax environment has been revised with several measures benefiting Austrian parent companies.
An Exploration of Psychological Well-being Among Pre-service Teachers in Sagaing University of Education
Creators: name: Chit, Yar Zar
Publisher: name: figshare
Year: 2021
Subjects: subject: 170103 Educational Psychology
subject: FOS: Psychology
subject: 111714 Mental Health
subject: FOS: Health sciences

description: This study investigated psychological well-being of pre-service teachers in Sagaing University of Education. In this study, 378 pre-service teachers from Sagaing University of Education participated as samples. Descriptive research design and survey method were used. Psychological well-being was measured by using Ryff’s Psychological Well-being Scale. The scale consists of a series of statements reflecting the six areas of psychological well-being: autonomy, environmental mastery, personal growth, positive relations with others, purpose in life and self-acceptance. Results showed that they have highest mean score in purpose in life (X =26.92) and lowest in autonomy ( X =22.95). The t test result revealed that autonomy (t=2.782, p<0.05) and self-acceptance (t= 3.829, p<0.05) of males are statistically higher than female. Moreover, psychological well-being mean score of male pre-service teachers is significantly higher than that of females (t=2.626, p<0.05). According to ANOVA result, it was found that fourth year pre-service teachers are higher in psychological well-being than first year ones. Based on the findings, it is hoped that the teacher trainers will get some ideas to promote the psychological well-being of their pre-service teachers.
Funerary inscription of Gaius Iulius Eutychus
Creators: name: Prag, Jonathan
Publisher: name: Zenodo
Year: 2020
Subjects: subject: Sicily
subject: epigraphy
subject: http://vocab.getty.edu/page/aat/300138808
subject: https://pleiades.stoa.org/places/462492

description: TEI EpiDoc record
CPU Torrent -- CPU Cycle Offloading to Reduce User Wait Time and Provider Resource Requirements
Creators: name: Sheth, Swapneel Kalpesh
name: Kaiser, Gail E.
Publisher: name: Columbia University
Year: 2008
Subjects: Computer science

description: Developers of novel scientific computing systems are often eager to make their algorithms and databases available for community use, but their own computational resources may be inadequate to fulfill external user demand -- yet the system's footprint is far too large for prospective user organizations to download and run locally. Some heavyweight systems have become part of designated "centers" providing remote access to supercomputers and/or clusters supported by substantial government funding; others use virtual supercomputers dispersed across grids formed by massive numbers of volunteer Internet-connected computers. But public funds are limited and not all systems are amenable to huge-scale divisibility into independent computation units. We have identified a class of scientific computing systems where "utility" sub-jobs can be offloaded to any of several alternative providers thereby freeing up local cycles for the main proprietary jobs, implemented a proof-of-concept framework enabling such deployments, and analyzed its expected throughput and response-time impact on a real-world bioinformatics system (Columbia's PredictProtein) whose present users endure long wait queues.
Baseline: Metrics for setting a baseline for web vulnerability scanners
Creators: name: Dai, Huning
name: Glass, Michael
name: Kaiser, Gail E.
Publisher: name: Columbia University
Year: 2010
Subjects: Computer science

description: As web scanners are becoming more popular because they are faster and cheaper than security consultants, the trend of relying on these scanners also brings a great hazard: users can choose a weak or outdated scanner and trust incomplete results. Therefore, benchmarks are created to both evaluate and compare the scanners. Unfortunately, most existing benchmarks suffer from various drawbacks, often by testing against inappropriate criteria that does not reflect the user's needs. To deal with this problem, we present an approach called Baseline that coaches the user in picking the minimal set of weaknesses (i.e., a baseline) that a qualified scanner should be able to detect and also helps the user evaluate the effectiveness and efficiency of the scanner in detecting those chosen weaknesses. Baseline's goal is not to serve as a generic ranking system for web vulnerability scanners, but instead to help users choose the most appropriate scanner for their specific needs.
Storytelling Strategies for Undergraduate Course on Science, Technology and Society
Creators: name: Joshi, Payal
Publisher: name: figshare
Year: 2023
Subjects: Curriculum and pedagogy theory and development

description: Storytelling style was adopted to teach science, technology and society as an elective course to engineering students at NMIMS University. Faculties incorporated interesting examples to explain different concepts that allowed higher student engagement. Different modules and curriculum development are discussed in the paper. Such form of narrative-styled teaching leads to life-long learning beyond the classroom.
Rapid Parallelization by Collaboration
Creators: name: Sethumadhavan, Lakshminarasimhan
name: Kaiser, Gail E.
Publisher: name: Columbia University
Year: 2009
Subjects: Computer science

description: The widespread adoption of Chip Multiprocessors has renewed the emphasis on the use of parallelism to improve performance. The present and growing diversity in hardware architectures and software environments, however, continues to pose difficulties in the effective use of parallelism thus delaying a quick and smooth transition to the concurrency era. In this document, we describe the research being conducted at the Computer Science Department at Columbia University on a system called COMPASS that aims to simplify this transition by providing advice to programmers considering parallelizing their code. The advice proffered to the programmer is based on the wisdom collected from programmers who have already parallelized some code. The utility of COMPASS rests, not only on its ability to collect the wisdom unintrusively but also on its ability to automatically seek, find and synthesize this wisdom into advice that is tailored to the code the user is considering parallelizing and to the environment in which the optimized program will execute in. COMPASS provides a platform and an extensible framework for sharing human expertise about code parallelization -- widely and on diverse hardware and software. By leveraging the "Wisdom of Crowds" model which has been conjunctured to scale exponentially and which has successfully worked for Wikis, COMPASS aims to enable rapid parallelization of code and thus continue to extend the benefits for Moore's law scaling to science and society.
ERL Poster Storytelling Strategies STS.pdf
Creators: name: Joshi, Payal
Publisher: name: figshare
Year: 2023
Subjects: Curriculum and pedagogy theory and development

description: Storytelling style was adopted to teach science, technology and society as an elective course to engineering students at NMIMS University. Faculties incorporated interesting examples to explain different concepts that allowed higher student engagement. Different modules and curriculum development are discussed in the paper. Such form of narrative-styled teaching leads to life-long learning beyond the classroom.
CMB lensing and primordial squeezed non-Gaussianity
Creators: name: Pearson, Ruth
name: Lewis, Antony
name: Regan, Donough
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Squeezed primordial non-Gaussianity can strongly constrain early-universe physics, but it can only be observed on the CMB after it has been gravitationally lensed. We give a new simple non-perturbative prescription for accurately calculating the effect of lensing on any squeezed primordial bispectrum shape, and test it with simulations. We give the generalization to polarization bispectra, and discuss the effect of lensing on the trispectrum. We explain why neglecting the lensing smoothing effect does not significantly bias estimators of local primordial non-Gaussianity, even though the change in shape can be >~10%. We also show how tau_NL trispectrum estimators can be well approximated by much simpler CMB temperature modulation estimators, and hence that there is potentially a ~10-30% bias due to very large-scale lensing modes, depending on the range of modulation scales included. Including dipole sky modulations can halve the tau_NL error bar if kinematic effects can be subtracted using known properties of the CMB temperature dipole. Lensing effects on the g_NL trispectrum are small compared to the error bar. In appendices we give the general result for lensing of any primordial bispectrum, and show how any full-sky squeezed bispectrum can be decomposed into orthogonal modes of distinct angular dependence.
description: 22 pages, 6 figures; minor edits to match published version
On thermodynamics and kinetics of interface-induced crystallization in polymers
Creators: name: Dolynchuk, Oleksandr
name: Thurn-Albrecht, Thomas
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 548

description: Crystallization initiated at interfaces is a ubiquitous phenomenon, covering both simple liquids and polymer melts. Understanding the physical process underlying interface-induced crystallization in polymers is of fundamental interest and is relevant for many applications, especially for films of functional semicrystalline polymers. Interface-induced crystallization of liquids can proceed either by heterogeneous nucleation or by the less explored equilibrium phenomenon of prefreezing. This study reports recent progress in the theoretical and experimental investigation of the effect of substrate-material interactions on the thermodynamic properties of prefreezing and on the kinetics of heterogeneous nucleation in model polymers on different flat substrates. Through a combination of various microscopy and scattering techniques, supported by theoretical analysis, a detailed picture of the two different phenomena of interface-induced crystallization in polymers is achieved.
On the detectability of star-planet interaction
Creators: name: Miller, Brendan P.
name: Gallo, Elena
name: Wright, Jason T.
name: Dupree, Andrea K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Magnetic (or tidal) interactions between "hot Jupiters" and their host stars can potentially enhance chromospheric and coronal activity. An ideal testbed for investigating this effect is provided by the extreme WASP-18 system, which features a massive (~10 times Jupiter) close-in (~1 day period) transiting planet orbiting a young F6 star. Optical and X-ray observations of WASP-18 were conducted in November 2011. The high-resolution echelle spectrograph MIKE was used on the 6.5m Magellan Clay telescope to obtain 13 spectra spanning planetary orbital phases of 0.7-1.4, while the X-ray Telescope on Swift provided contemporaneous monitoring with a stacked exposure of ~50 ks. The cores of the Ca II H and K lines do not show significant variability over multiple orbits spanning ~8 d, in contrast to the expectation of phase-dependent chromospheric activity enhancements for efficient star-planet interaction. The star is also X-ray faint, with log Lx < 27.6 erg/s (0.3-2 keV), indicating that coronal activity is likewise low. The lack of detectable star-planet interaction in this extreme system requires that any such effect must here be transient, if indeed present. We demonstrate that searches for Ca II H and K variability can potentially mistake a stellar hotspot, if observed over a short segment of the rotation period, for planet-induced activity. Taken together, these results suggest that the utility of star-planet interaction as a robust method of estimating exoplanet magnetic field strengths may be limited.
description: Accepted to ApJ; 9 pages emulateapj, 5 figures, 1 table (v2: corrected fn15, typos, refs)
Exploring a Few Good Tuples From a Text Database
Creators: name: Jain, Alpa
name: Srivastava, Divesh
Publisher: name: Columbia University
Year: 2008
Subjects: Computer science

description: Information extraction from text databases is a useful paradigm to populate relational tables and unlock the considerable value hidden in plain-text documents. However, information extraction can be expensive, due to various complex text processing steps necessary in uncovering the hidden data. There are a large number of text databases available, and not every text database is necessarily relevant to every relation. Hence, it is important to be able to quickly explore the utility of running an extractor for a specific relation over a given text database before carrying out the expensive extraction task. In this paper, we present a novel exploration methodology of finding a few good tuples for a relation that can be extracted from a database which allows for judging the relevance of the database for the relation. Specifically, we propose the notion of a good(k,l) query as one that can return any k tuples for a relation among the top-l fraction of tuples ranked by their aggregated confidence scores, provided by the extractor; if these tuples have high scores, the database can be determined as relevant to the relation. We formalize the access model for information extraction, and investigate efficient query processing algorithms for good(k,l) queries, which do not rely on any prior knowledge about the extraction task or the database. We demonstrate the viability of our algorithms using a detailed experimental study with real text databases.
Additional file 1 of Contribution of ESC DAPT guideline-endorsed high thrombotic risk features to long-term clinical outcomes among patients with and without high bleeding risk after PCI
Creators: name: Wang, Hao-Yu
name: Dou, Ke-Fei
name: Yin, Dong
name: Zhang, Dong
name: Gao, Run-Lin
name: Yang, Yue-Jin
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer

description: Additional file 1.
Forging new alliances : exploring the social work – police constable partnership within the Abuse Against Older Adults unit
Creators: name: Tan, Lourdes Elisse
Publisher: name: University of British Columbia
Year: 2011

description: Elder abuse interventions need a multidisciplinary approach to address the complex dynamics of the abusive situation. The introduction of the Abuse Against Older Adults (AAOA) unit provides a unique opportunity to address the psychosocial, criminal and legal dimensions related to elder abuse. This thesis focuses on the evaluation of the AAOA unit in its first year of operation in Vancouver, B.C. A qualitative research study was conducted, utilizing focus groups to gather data. The findings show that a police-social worker partnership model is critical in meeting service gaps in this area of practice. The data also explored the interaction between the AAOA unit and the external health care agencies that refer cases to this team. The results encourage future research to continue studying collaboration across multidisciplinary service providers, and further study on the social work role in law enforcement culture.
Distributed eXplode: A High-Performance Model Checking Engine to Scale Up State-Space Coverage
Creators: name: Keetha, Nageswar
name: Wu, Leon Li
name: Kaiser, Gail E.
name: Yang, Junfeng
Publisher: name: Columbia University
Year: 2008
Subjects: Computer science

description: Model checking the state space (all possible behaviors) of software systems is a promising technique for verification and validation. Bugs such as security vulnerabilities, file storage issues, deadlocks and data races can occur anywhere in the state space and are often triggered by corner cases; therefore, it becomes important to explore and model check all runtime choices. However, large and complex software systems generate huge numbers of behaviors leading to 'state explosion'. eXplode is a lightweight, deterministic and depth-bound model checker that explores all dynamic choices at runtime. Given an application-specific test-harness, eXplode performs state search in a serialized fashion - which limits its scalability and performance. This paper proposes a distributed eXplode engine that uses multiple host machines concurrently in order to achieve more state space coverage in less time, and is very helpful to scale up the software verification and validation effort. Test results show that Distributed eXplode runs several times faster and covers more state space than the standalone eXplode.
Holographic power-law traps for the efficient production of Bose-Einstein condensates
Creators: name: Bruce, Graham D.
name: Bromley, Sarah L.
name: Smirne, Giuseppe
name: Torralbo-Campo, Lara
name: Cassettari, Donatella
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We use a phase-only spatial light modulator to generate light distributions in which the intensity decays as a power law from a central maximum, with order ranging from 2 (parabolic) to 0.5. We suggest that a sequence of these can be used as a time-dependent optical dipole trap for all-optical production of Bose-Einstein condensates in two stages: efficient evaporative cooling in a trap with adjustable strength and depth, followed by an adiabatic transformation of the trap order to cross the BEC transition in a reversible way. Realistic experimental parameters are used to verify the capability of this approach in producing larger Bose-Einstein condensates than by evaporative cooling alone.
description: 6 pages, 6 figures, minor changes to figures, sentence added at the end of section IV
Tendencies towards underhelping following a mild provocation: a behavioural investigation into the nature of revenge between strangers versus intimates
Creators: name: Alibhai, Alishia Mahmud
Publisher: name: University of Calgary
Year: 2005

description: Bibliography: p. 69-73
description: The purpose of this study was to determine whether people would be more or less likely to seek revenge against a romantic partner or a stranger following an in-lab provocation. Dating couples attended each session and were led to believe they were playing two computer games either with their own romantic partner or a stranger. In actuality, all participants played both games with a pre-programmed computer. Whereas the first game served as the provocation, the second game provided participants with an opportunity to retaliate in the form of an "underhelping" behaviour. The predicted interaction was not found. Regardless of who they believed their game partner was, provoked participants retaliated to a greater extent than not provoked participants and, independent of whether they were provoked or not, participants were less likely to underhelp their romantic partners than strangers.
Concurrency Attacks
Creators: name: Yang, Junfeng
name: Cui, Ang
name: Gallagher, John Martin
name: Stolfo, Salvatore
name: Sethumadhavan, Lakshminarasimhan
Publisher: name: Columbia University
Year: 2011
Subjects: Computer science

description: Just as errors in sequential programs can lead to security exploits, errors in concurrent programs can lead to concurrency attacks. In this paper, we present an in-depth study of concurrency attacks and how they may affect existing defenses. Our study yields several interesting findings. For instance, we find that concurrency attacks can corrupt non-pointer data, such as user identifiers, which existing memory-safety defenses cannot handle. Inspired by our findings, we propose new defense directions and fixes to existing defenses.
Formalizing point-of-view: the role of sentience in Blackfoot's direct/inverse system
Creators: name: Bliss, Heather
Publisher: name: University of Calgary
Year: 2005

description: Bibliography: p. 111-118
description: Obviation and direct/inverse in the Algonquian languages are typically assumed to work together as a single concerted system, both marking the same type of discourse prominence. This thesis challenges this assumption through an investigation of the direct/inverse system of Blackfoot, a Plains Algonquian language spoken in Southern Alberta and Northwestern Montana. I argue that sentience, or real-world animacy, is the determinant factor in Blackfoot's direct/inverse, and that obviation is tangential to this system. The fundamental role of sentience in Blackfoot's direct/inverse is explored from both a syntactic and a pragmatic perspective. A syntactic treatment is proposed in which a feature [Sentient] is checked in a functional projection that determines direct and inverse marking. With respect to its pragmatic content, I argue that this functional projection is a Point-of-View Phrase, and that direct/inverse m Blackfoot grammaticalizes the pragmatic notion of point-of-view.
A Chandra X-ray Survey of Ejecta in the Cassiopeia A Supernova Remnant
Creators: name: Hwang, Una
name: Laming, J. Martin
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a survey of the X-ray emitting ejecta in the Cassiopeia A supernova remnant based on an extensive analysis of over 6000 spectral regions extracted on 2.5-10" angular scales using the Chandra 1 Ms observation. We interpret these results in the context of hydrodynamical models for the evolution of the remnant. The distributions of fitted temperature and ionization age, and the implied mass coordinates, are highly peaked and suggest that the ejecta were subjected to multiple secondary shocks following reverse shock interaction with ejecta inhomogeneities. Based on the fitted emission measure and element abundances, and an estimate of the emitting volume, we derive masses for the X-ray emitting ejecta and also show the distribution of the mass of various elements over the remnant. An upper limit to the total shocked Fe mass visible in X-rays appears to be roughly 0.13 M_sun, which accounts for nearly all of the mass expected in Fe ejecta. We find two populations of Fe ejecta, that associated with normal Si-burning and that possibly associated with alpha-rich freeze-out, with a mass ratio of approximately 2:1. Essentially all of the observed Fe (both components) lies well outside the central regions of the SNR, possibly having been ejected by hydrodynamic instabilities during the explosion. We discuss this, and its implications for the neutron star kick.
description: ApJ, in press; 22 pages, 6 figures with multiple parts
Exploring Computation and Communication Trade-offs in the Design of Automatic Video Surveillance Networks
Creators: name: Pinto, Alessandro
name: Carloni, Luca
name: Sangiovanni-Vincentelli, Alberto
Publisher: name: Columbia University
Year: 2008
Subjects: Computer science

description: Video surveillance is one of the fastest-growing class of networked embedded systems. An increasing number of cameras are networked to support various applications including security in city streets, emergency evacuation in large buildings and direct marketing in department stores. The large number of networked cameras motivates the need for automatic video analysis, which, as of today, relies mostly on centralized computation. Still, trends in embedded computing enable the cost-effective realization of smart camera nodes and, consequently, the distribution of part or all of the computation. Starting from a particular application of automatic video surveillance for building automation, we derive a system-level model of the main computational tasks that are necessary to process a collection of video streams together with their requirements in terms of computation and communication resources. Then, we define a set of alternative implementation platforms based on a detailed analysis of the possible choices in terms of off-the-shelf components and interconnection network technologies. Finally, we present a methodology and supporting CAD tool that assists us in evaluating alternative partitioning/mapping of the computational tasks onto the various platforms.
Hungarian multinationals a strong presence in neighborhood, survey finds
Creators: name: Sass, Magdolna
name: Kovács, Olivér
Publisher: name: Columbia University
Year: 2011
Subjects: Business
Finance

description: The ICEG European Center in Budapest, Hungary, and the Vale Columbia Center on Sustainable International Investment (VCC), a joint undertaking of the Columbia Law School and the Earth Institute at Columbia University in New York, are releasing the results of a survey on outward investors today. The survey is part of a long-term study of the rapid global expansion of multinational enterprises from emerging markets. The results released today focus on Hungarian multinationals in particular. The present survey, conducted in 2010, covers the period 2007-2009.
Efficient, Deterministic and Deadlock-free Concurrency
Creators: name: Vasudevan, Nalini
Publisher: name: Columbia University
Year: 2011
Subjects: Computer science

description: Concurrent programming languages are growing in importance with the advent of multicore systems. Two major concerns in any concurrent program are data races and deadlocks. Each are potentially subtle bugs that can be caused by nondeterministic scheduling choices in most concurrent formalisms. Unfortunately, traditional race and deadlock detection techniques fail on both large programs, and small programs with complex behaviors. We believe the solution is model-based design, where the programmer is presented with a constrained higher-level language that prevents certain unwanted behavior. We present the SHIM model that guarantees the absence of data races by eschewing shared memory. This dissertation provides SHIM based techniques that aid determinism - models that guarantee determinism, compilers that generate deterministic code and libraries that provide deterministic constructs. Additionally, we avoid deadlocks, a consequence of improper synchronization. A SHIM program may deadlock if it violates a communication protocol. We provide efficient techniques for detecting and deterministically breaking deadlocks in programs that use the SHIM model. We evaluate the efficiency of our techniques with a set of benchmarks. We have also extended our ideas to other languages. The ultimate goal is to provide deterministic deadlock-free concurrency along with efficiency. Our hope is that these ideas will be used in the future while designing complex concurrent systems.
The conformal anomaly and dark energy : how the conformal anomaly can introduce an IR scale into the vacuum energy
Creators: name: Thomas, Evan Cameron
Publisher: name: University of British Columbia
Year: 2011

description: We suggest that the solution to the cosmological vacuum energy puzzle may come from the infrared sector of the low energy eﬀective quantum ﬁeld theory of gravity, where the impact of the conformal anomaly is of the upmost importance. We proceed by introducing two auxiliary ﬁelds, which describe the quantum state by the speciﬁcations of their macroscopic IR boundary conditions, in contrast to UV quantum eﬀects. Our investigation aims at ﬁnding a realistic cosmological solution which interprets the observed dark energy as a well deﬁned deﬁcit in the zero point energy density of the Universe. The energy density arises from a ’phase transition’ that alters the quantum ground state, wherein we give a precise ’renormalization’ scheme and deﬁnition for a ’renormalized vacuum energy’ that we identify with the dark energy.
การเปรียบเทียบตัวแบบการพยากรณ์จํานวนผู้ป่วยโรคปอดอักเสบในประเทศไทย
Creators: name: สวพร หิญชีระนันทน์
Publisher: name: กองบริหารการวิจัย
Year: 2564
Subjects: อนุกรมเวลา
เทคนิคการพยากรณ์แบบมีฤดูกาล
วิธีบอกซ์และเจนกินส์

description: วารสารวิทยาศาสตร์และเทคโนโลยี, 29, 3, 365-377
Estimation of System Reliability Using a Semiparametric Model
Creators: name: Wu, Leon Li
name: Teravainen, Timothy Kaleva
name: Kaiser, Gail E.
name: Anderson, Roger N.
name: Boulanger, Albert G.
name: Rudin, Cynthia
Publisher: name: Columbia University
Year: 2011
Subjects: Computer science

description: An important problem in reliability engineering is to predict the failure rate, that is, the frequency with which an engineered system or component fails. This paper presents a new method of estimating failure rate using a semiparametric model with Gaussian process smoothing. The method is able to provide accurate estimation based on historical data and it does not make strong a priori assumptions of failure rate pattern (e.g., constant or monotonic). Our experiments of applying this method in power system failure data compared with other models show its efficacy and accuracy. This method can be used in estimating reliability for many other systems, such as software systems or components.
Simulation of VUV electroluminescence in micropattern gaseous detectors: the case of GEM and MHSP
Creators: name: Oliveira, C. A. B.
name: Correia, P. M. M.
name: Schindler, H.
name: Ferreira, A. L.
name: Monteiro, C. M. B.
name: Santos, J. M. F. dos
name: Biagi, S.
name: Veenhof, R.
name: Veloso, J. F. C. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Electroluminescence produced during avalanche development in gaseous avalanche detectors is an useful information for triggering, calorimetry and tracking in gaseous detectors. Noble gases present high electroluminescence yields, emitting mainly in the VUV region. The photons can provide signal readout if appropriate photosensors are used. Micropattern gaseous detectors are good candidates for signal amplification in high background and/or low rate experiments due to their high electroluminescence yields and radiopurity. In this work, the VUV light responses of the Gas Electron Multiplier and of the Micro-Hole Strip Plate, working with pure xenon, are simulated and studied in detail using a new and versatile C++ toolkit. It is shown that the solid angle subtended by a photosensor placed below the microstructures depends on the operating conditions. The obtained absolute EL yields, determined for different gas pressures and as functions of the applied voltage, are compared with those determined experimentally.
description: Accepted for publication in Journal of Instrumentation
The Benefits of Using Clock Gating in the Design of Networks-on-Chip
Creators: name: Petracca, Michele
name: Carloni, Luca
Publisher: name: Columbia University
Year: 2011
Subjects: Computer science

description: Networks-on-chip (NoC) are critical to the design of complex multi-core system-on-chip (SoC) architectures. Since SoCs are characterized by a combination of high performance requirements and stringent energy constraints, NoCs must be realized with low-power design techniques. Since the use of semicustom design flow based on standard-cell technology libraries is essential to cope with the SoC design complexity challenges under tight time-to-market constraints, NoC must be implemented using logic synthesis. In this paper we analyze the major power reduction that clock gating can deliver when applied to the synthesis of a NoC in the context of a semi-custom automated design flow.
Testing theories in barred spiral galaxies
Creators: name: Martínez-García, Eric E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: According to one version of the recently proposed "manifold" theory that explains the origin of spirals and rings in relation to chaotic orbits, galaxies with stronger bars should have a higher spiral arms pitch angle when compared to galaxies with weaker bars. A sub-sample of barred-spiral galaxies in the Ohio State University Bright Galaxy Survey, was used to analyze the spiral arms pitch angle. These were compared with bar strengths taken from the literature. It was found that the galaxies in which the spiral arms maintain a logarithmic shape for more than 70$\degr$ seem to corroborate the predicted trend.
description: Accepted for publication in ApJ