cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Study of Volunteered Geographic Information and Social Media
Creators: name: Li, Ren-Yu
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Information Science
subject: Social Network Analysis
subject: Clustering
subject: mobile application
subject: transportation
subject: text mining

description: The Web 2.0 has changed the way that people communicate with each other. Web 2.0 platforms allow the creation and the exchange of user-generated contents (UGCs) on the Internet. The UGCs contain explicit and implicit geographic information. The quantity of geographic information continuously increases as number of Internet users expands. Since Volunteered Geographic Information (VGI) and social media have been considered as crowdsourcing data resources to harvest geographic information from the web, this thesis investigates two types of crowdsourcing data: VGI and social media data in three topics (i.e., researches). The first research addresses the bottlenecks of current traffic data collections and proposes a solution that utilizes VGI to solve the problems. To collect and use VGI to solve traffic problems, we have reviewed the existing transportation-related mobile applications and designed and developed a complete front-end and back-end GIS for transportation. This research may be beneficial for the design of modern transportation system. The second research aims to explore and extract local information from social media. To achieve the goal, this research proposes an algorithm to discover transient local communities (TLCs) in time evolving social media. The proposed model integrates a damping function to filter irrelevant connections over time, a graph-clustering algorithm to identify communities, and a geo-location proximity algorithm to gather geographically close users. The algorithm has been evaluated by using a Twitter dataset and its performance has been examined in terms of the ability to extract local information. The third research aims to discover communities of interest (CoIs) in local social media. This research may benefit the local information broadcasting and local marketing. In order to discover CoIs from the noisy social media data collected, this research employs natural language processing to clean the short messages (e.g., tweets) and proposes different ways to build sociograms. This research also proposes a graph clustering algorithm that enhances the fast-greedy optimization of modularity (FGM) with text similarity measures to eliminate the noises created by meaningless connections. The algorithm has been evaluated by using a Twitter dataset, and its performance has been examined in terms of the numbers of CoIs discovered under different conditions.
Finite size scaling in minimal walking technicolor
Creators: name: Giedt, Joel
name: Weinberg, Evan
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We compare observables to the finite size scaling hypothesis in SU(2) lattice gauge theory with two Dirac fermions in the adjoint representation. The fits that we obtain yield an estimate of the anomalous mass dimension that is consistent with four loop perturbation theory: $γ= 0.51 \pm 0.16$, with the error due to systematic uncertainties in the finite size scaling analysis. The result is somewhat larger than one Schrödinger functional study (by 1.3$σ$) but consistent with another.
description: 5 pages, 4 figures
A Tale of a ‘Tail’ – Understanding the Role of Ku80 C-terminal Region in Non-Homologous End Joining
Creators: name: Radhakrishnan, Sarvan Kumar
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Biochemistry
subject: Non-Homologous End Joining
subject: Ku80 C-terminal
subject: DNA-PKcs

description: Non-homologous end joining (NHEJ) is the major DNA double strand (DSB) break repair pathway in mammalian cells. The first step in NHEJ is recognition of DSBs by the Ku heterodimer and subsequent recruitment of DNA-dependent protein kinase catalytic subunit (DNA-PKcs), a serine/threonine protein kinase, to form the DNA-PK complex. This complex aligns DSB ends, activates Artemis endonuclease activity and finally recruits XRCC4-DNA ligase IV, which ligates DNA ends. The Ku heterodimer consists of 70 and 80 kDa subunits and is conserved throughout evolution. It has been suggested that the extreme C-terminal 14 amino acids of Ku80 is required for DNA-PKcs recruitment and activation. However, another study demonstrated that deletion of the Ku80 C-terminal region (CTR) does not abolish DNA-PKcs activation. Thus, there is considerable ambiguity regarding the role of the Ku80 CTR in DNA-PKcs recruitment and activation. The aim of this study is to understand the role of Ku80 CTR in NHEJ with focus on its ability to recruit and activate DNA-PKcs kinase activity. Using clonogenic cell survival assays, I confirmed that hamster cells expressing Ku80 CTR deletions are radiosensitive and also showed sensitivity to other DSB inducing agents such as doxorubicin and neocarzinostatin. I then generated Ku80 C-terminal deletions (Ku80 residues 1-718 and 1-569), cloned them into baculovirus vectors and expressed and purified the corresponding Ku heterodimers from insect cells. In vitro autophosphorylation reactions, in presence of calf-thymus DNA, using purified proteins showed that Ku heterodimer with Ku80 residues 1-718 showed only a slight defect in DNA-PKcs autophosphorylation, whereas heterodimer with Ku80 residues 1-569 had significant defects in multiple DNA-PKcs autophosphorylation sites. Surprising results were observed when defined DNA structures such as 25 base pair (bp) blunt ended double stranded (ds) DNA was used. Deletion of the entire Ku80 CTR (residues 570-732) lead to abrogation of DNA-PKcs kinase activity and inability to interact with DNA-PKcs protein. On the other hand, deletion of extreme C-terminal 14 amino acids of Ku80 did not affect DNA-PKcs kinase activity but showed defects in its ability to interact with DNA-PKcs. These defects may underlie the radiation and chemosensitivity of Ku80 CTR deletion mutants.
Structural Studies of Hepatitic C Virus RNA Polymerase Replication Complexes
Creators: name: Rao, Chandni
Publisher: name: Graduate Studies
Year: 2013
Subjects: Biology

description: Estimates suggest that there are currently 200 million people, worldwide, infected with the Hepatitis C virus and these numbers are anticipated to rise within the next decade. Despite intensive research over the past twenty years, there are still no vaccines available to prevent infections and existing antiviral treatments are associated with serious complications. As a result, there is a pressing need for more effective and broadly applicable therapeutics. As potential treatments, drugs targeting particular steps in the replication of the virus are being developed. Hepatitis C virus polymerase, NS5B, is essential for the replication of the virus and as a result has been targeted for the development of new antiviral agents. Crystallographic studies of the enzyme bound to its ligands, including RNA templates, nucleotides or inhibitors, should provide more information on the mechanism of the enzyme, which can ultimately be exploited for drug-design studies.
ผลการให้บริการเลิกบุหรี่ด้วยรูปแบบพีเอเอสฉบับปรับปรุง
Creators: name: ศิวรินทร์ ทองวัตร
Publisher: name: กองนวัตกรรมและวิจัย กรมควบคุมโรค
Year: 2553
Subjects: บริการเลิกบุหรี่
รูปแบบพีเอเอส
เภสัชกรชุมชน

description: วารสารควบคุมโรค, 36, 1, 19-31
The Diagnostic Potential of Transition Region Lines under-going Transient Ionization in Dynamic Events
Creators: name: Doyle, J. G.
name: Giunta, A.
name: Singh, A.
name: Madjarska, M. S.
name: Summers, H.
name: Kellett, B. J.
name: O'Mullane, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We discuss the diagnostic potential of high cadence ultraviolet spectral data when transient ionization is considered. For this we use high cadence UV spectra taken during the impulsive phase of a solar flares (observed with instruments on-board the Solar Maximum Mission) which showed excellent correspondence with hard X-ray pulses. The ionization fraction of the transition region ion O V and in particular the contribution function for the O V 1371A line are computed within the Atomic Data and Analysis Structure, which is a collection of fundamental and derived atomic data and codes which manipulate them. Due to transient ionization, the O V 1371A line is enhanced in the first fraction of a second with the peak in the line contribution function occurring initially at a higher electron temperature than in ionization equilibrium. The rise time and enhancement factor depend mostly on the electron density. The fractional increase in the O V 1371A emissivity due to transient ionization can reach a factor of 2--4 and can explain the fast response in the line flux of transition regions ions during the impulsive phase of flares solely as a result of transient ionization. This technique can be used to diagnostic the electron temperature and density of solar flares observed with the forth-coming Interface Region Imaging Spectrograph.
description: 18 pages, 6 figures
Persephona lichtensteinii Leach 1817
Creators: name: Almeida, Alexandre Oliveira De
name: Guerrazzi, Maria Cec Lia
name: Coelho, Petr Ȏ Nio Alves
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Leucosiidae
Persephona
Persephona lichtensteinii

description: Persephona lichtensteinii Leach, 1817
Material examined (N=4). 2m, 19/IX/2000, 13°52’99”S / 38°59’59”W (MZUESC #65).
Distribution. Western Atlantic – Venezuela, Surinam, French Guyana, and Brazil (from Amapá to São Paulo) (Melo 1996).
Ecological notes. On mud, sand, and calcareous algae bottoms. From shallow waters to 70 m (Melo 1996).
Previous records in Bahia. Almeida et al. (2007).
description: Published as part of Almeida, Alexandre Oliveira De, Guerrazzi, Maria Cec Lia & Coelho, Petr Ȏ Nio Alves, 2007, Stomatopod and decapod crustaceans from Camamu Bay, state of Bahia, Brazil, pp. 1-45 in Zootaxa 1553 on pages 25-26, DOI: 10.5281/zenodo.178168
W Plus Multiple Jets at the LHC with High Energy Jets
Creators: name: Andersen, Jeppe R.
name: Hapola, Tuomas
name: Smillie, Jennifer M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the production of a W boson in association with n hard QCD jets (for n>=2), with a particular emphasis on results relevant for the Large Hadron Collider (7 TeV and 8 TeV). We present predictions for this process from High Energy Jets, a framework for all-order resummation of the dominant contributions from wide-angle QCD emissions. We first compare predictions against recent ATLAS data and then shift focus to observables and regions of phase space where effects beyond NLO are expected to be large.
description: 19 pages, 9 figures
Statistical Analysis Effect of Medication
Creators: name: Constable, Paul
Publisher: name: figshare
Year: 2020
Subjects: Neuroscience

description: The following analysis has the goal of examining the effect medication CNS_MED), while controlling for other covariates, on each of the ERG-related dependent variables; i.e. b20, b40, op80, op160, a20, and a40.The independent variables are (no order implied) medication (CNS_MED, M), flash strength Strength, FS),vertical location (VERT, V), iris (iris, I), group (group, G), ethnicity (ethnicity, E) and interaction between flash strength and group (FS · G). Variables not listed here, aren’t considered later on. The models to consider will thus be: DV M + FS + V + I + G + E + FS · G; where DV is each of the ERG-related variables.
 The (explanatory) model is analysed via robust (fixed-effects) linear regression. The ultimate goal is to see if medication has an effect on the DV s. Thus, the pairwise differences between the medication groups will be assessed at each DV .
Prediction of breastfeeding outcomes: Results from the All Our Babies study
Creators: name: Nagulesapillai, Tharsiya
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Epidemiology
subject: Epidemiology
subject: Breastfeeding

description: Objective: The objective of this study was to examine and compare predictors of any breastfeeding and exclusive breastfeeding at 4 months postpartum between women residing in Canada for 5+ years and those new to Calgary and Canada. Methods: As part of a longitudinal study, women completed questionnaires about pregnancy experiences and breastfeeding practices. Bivariate analysis and multivariable logistic regression were conducted to identify the prevalence and predictors associated with breastfeeding outcomes at 4 months postpartum. Results: While numerous variables were found to be predictive of breastfeeding outcomes, the key factors were perceived prenatal physical health, pre-pregnancy BMI and smoking status prior to and during pregnancy. These three factors were consistently found to be predictive of both breastfeeding outcomes across all populations assessed. Conclusion: Although certain predictors of breastfeeding duration were similar between the groups, several were dissimilar, suggesting that these groups might benefit from different strategies to optimize breastfeeding outcomes.
Coupled nonlinear oscillators: metamorphoses of amplitude profiles for the approximate effective equation - the case of 1:3 resonance
Creators: name: Kyziol, Jan
name: Okninski, Andrzej
Publisher: name: arXiv
Year: 2011
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: 14H20 (Primary) 58K05 (Secondary)

description: We study dynamics of two coupled periodically driven oscillators. An important example of such a system is a dynamic vibration absorber which consists of a small mass attached to the primary vibrating system of a large mass. Periodic solutions of the approximate effective equation (derived in our earlier papers) are determined within the Krylov-Bogoliubov-Mitropolsky approach to compute the amplitude profiles $A(Ω)$. In the present paper we investigate metamorphoses of the function $A(Ω)$ induced by changes of the control parameters in the case of 1:3 resonances.
description: 10 pages, 5 figures, introductory material written anew
Understanding and Supporting the Needs of Post-Secondary Students with Autism Spectrum Disorder (ASD): A Qualitative Study of the Student Perspective
Creators: name: Schembri, Taylor
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Educational Psychology
subject: autism spectrum disorder (ASD)
subject: post-secondary students
subject: barriers
subject: supports

description: Individuals with autism spectrum disorder (ASD) are a growing subgroup within post-secondary populations. However, little is known about post-secondary students with ASD, and even less regarding the barriers to their success. Available information suggests students with ASD struggle more and are less successful than neurotypical students, but this information has often relied on expert opinions and has failed to incorporate the first-hand perspective of students with autism. To address the gap in direct research of student experiences, a qualitative inquiry was conducted into the barriers to success for post-secondary students with ASD. Student participants from post-secondary institutions in Calgary, Alberta were interviewed and their responses analyzed using Thematic Analysis. Results identify multiple barriers to success for this population. Ten themes were identified in three categories: intrapersonal barriers, interpersonal barriers, and system concerns; while two separate cross-cutting themes (compounded concerns and achieving competency in independence) also emerged.
Erich Leo Lehmann---A glimpse into his life and work
Creators: name: Rojo, Javier
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: Through the use of a system-building approach, an approach that includes finding common ground for the various philosophical paradigms within statistics, Erich L. Lehmann is responsible for much of the synthesis of classical statistical knowledge that developed from the Neyman--Pearson--Wald school. A biographical sketch and a brief summary of some of his many contributions are presented here. His complete bibliography is also included and the references present many other sources of information on his life and his work.
description: Published in at http://dx.doi.org/10.1214/11-AOS927 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
LRS Bianchi-I Anisotropic Cosmological Model with Dominance of Dark Energy
Creators: name: Yadav, Anil Kumar
name: Saha, Bijan
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Physics (physics.gen-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The present study deals with spatially homogeneous and anisotropic locally rotationally symmetric (LRS) Bianchi type I cosmological model with dominance of dark energy. To get the deterministic model of Universe, we assume that the shear scalar $(σ)$ in the model is proportional to expansion scalar $(θ)$. This condition leads to $A=B^{n}$, where $A$,\;$B$ are metric potential and $n$ is positive constant. It has been found that the anisotropic distribution of dark energy leads to the present accelerated expansion of Universe. The physical behavior of the Universe has been discussed in detail.
description: 11 pages, 4 figures, Accepted for publication in Astrophysics and Space Science
Ks, Lambda and Xi production at intermediate to high pT from Au+Au collisions at \sqrt{s_{NN}} = 39, 11.5 and 7.7 GeV
Creators: name: Zhu, Xianglei
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We report on the pT dependence of nuclear modification factors ($R_{CP}$) for Ks, Lambda, Xi and the Anti-Lambda/Ks ratios at mid-rapidity from Au+Au collisions at \sqrt{s_{NN}} = 39, 11.5 and 7.7 GeV. At \sqrt{s_{NN}} = 39 GeV, the $R_{CP}$ data shows a baryon/meson separation at intermediate pT and a suppression for Ks for pT up to 4.5 GeV/$c$; the Anti-Lambda/Ks shows baryon enhancement in the most central collisions. However, at \sqrt{s_{NN}} = 11.5 and 7.7 GeV, $R_{CP}$ shows much less baryon/meson separation and Anti-Lambda/Ks shows almost no baryon enhancement. These observations indicate that the matter created in Au+Au collisions at \sqrt{s_{NN}} = 11.5 or 7.7 GeV might be distinct from that created at \sqrt{s_{NN}} = 39 GeV.
description: 4 pages, 2 figures, to appear in the proceedings of 7th International Workshop on Critical Point and Onset of Deconfinement (CPOD2011), Wuhan, China, Nov. 7-11, 2011
Emergence of Producer Companies as Innovative Institutions for Agriculture Development in India: Issues and Challenges
Creators: name: Shilpa, S K
name: Shilpa, S K
Publisher: name: Unknown
Year: 2020
Subjects: subject: Agribusiness
subject: Industrial Organization
subject: producer organization
subject: producer companies
subject: India

description: Small and marginal farmers encounter several challenges in managing their farms, the major being limited investment capacity, access to inputs, water, power, and credit. In India, the Ministry of Agriculture recognized the collectivization of these farmers into producer organizations (POs) as the most appropriate institutional form to leverage farmers’ production and marketing capacities. The study aims to understand the characteristics of producer companies (PCs) and identify the issues and challenges in the emergence of PCs through a quantitative study of all PCs registered in the country using secondary data and a qualitative study based on interviews with 192 PC directors, members, and 11 promoting institutions. The formation and development of PCs are being actively undertaken by government and their agencies with major financial support from the Small Farmers Agri-Business Consortium (SFAC) and the National Bank for Agriculture and Rural Development (NABARD), with technical support from resource support agencies. A total of 7,381 PCs were registered by March 2019, across 33 states and union territories, and 2,749 PCs were active as of March 2018. PCs face numerous challenges, the major being shortage of investment and working capital, compliance-related problems, lack of vision and direction from the board and poor professional management. From the perspective of the producer organization promoting institutions or POPIs, the major issues were attitude of farmers, limited number of members, poor equity base, subsidy driven process, and non-result-oriented approach of the PCs.
Functional Genomic Characterization of Transcription Factors in Fission Yeast
Creators: name: Vachon, Lianne
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Biology--Molecular

description: Mapping an organism’s transcriptional regulatory network (TRN), which consists of all interactions between its transcription factors (TF) and target genes, is a necessary step in developing a complete understanding of how that organism normally develops, and how disease states can arise. However, the number of TFs, target genes, and potential regulatory interactions make this a difficult task, even in simple eukaryotes. In this study, the TRN of Schizosaccharomyces pombe was studied. To do so, we systematically deleted over 80% of fission yeast TFs, and characterized the effects of TFΔ on cell growth, length, and gene expression. Deletion of most TFs did not appear to impact the cell, suggesting that many may be inactive in rich medium. To circumvent this issue, we used two approaches. First, hypersensitivity of TFΔ strains to various drug compounds was determined to identify conditions that might induce TF activity. A four-way microarray expression profiling scheme was then used to identify the target genes and function of uncharacterized TF Toe1. This revealed that Toe1 regulated several genes implicated in the pyrimidine salvage pathway. Secondly, we systematically overexpressed S. pombe TF genes under control of the nmt1 promoter. Over 70% of the overexpressed TF genes resulted in altered cell length or fitness, indicating that their target genes might be inappropriately expressed. Expression microarrays and ChIP-chip were thus used to identify the putative target genes for three uncharacterized fungal TFs, SPBC1773.16, SPBC16G5.17, and SPAC25B8.11, revealing potential roles for each of these TFs in regulating the utilization of alternative nitrogen sources. Finally, screens of our TFΔ array in flocculation inducing and rich mediums revealed six novel transcriptional activators (Foe1, Prr1, Prt1, SPBC530.08, Fep1, and Grt1) and two transcriptional repressors (Scr1 and SPBC56F2.05) of flocculation. Microarray expression profiling was used to identify potential target genes for six of these TFs. Additionally, ChIP-chip was used to identify direct Foe1 targets, revealing that this TF directly binds and regulates the expression of several genes encoding flocculins and cell wall remodeling/biosynthesis proteins. Collectively, these results should contribute to a better understanding of transcriptional regulation in S. pombe as a whole.
Supportive Transitions and Health: A Mixed Methods Study of Formerly Homeless Persons and Street Exits
Creators: name: Desjarlais-DeKlerk, Kristen
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Social Work
subject: FOS: Sociology
subject: Sociology
subject: homelessness
subject: housing
subject: Health

description: This dissertation explores connections between homelessness, housing, and health. Drawing on a mixed methods two-phase design presented in a series of three separate articles, this dissertation demonstrates the changes experienced by formerly homeless individuals when they transition into supported housing. Health and stress comparisons are made between currently and formerly homeless individuals, as are changes experienced by formerly homeless individuals during their first six months of housing tenure. The findings indicate that individuals who transition from homelessness into housing appear to experience improvements in their health and wellbeing. But housing does not appear solely responsible for these positive changes. Rather, the findings demonstrate the importance of formal and informal social relationships during this status transition. Caseworkers and physicians operate as formal supporters, and provide important services to help stabilize and minimize the stresses that accompany this status transition. Informal social relationships developed away from social service agencies and shelters aid in developing identities apart from homelessness.
Preservation of entanglement in a two-qubit-spin coupled system
Creators: name: Hou, Yu-Chen
name: Zhang, Guo-feng
name: Chen, Yan
name: Fan, Heng
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A theoretical scheme to preserve the entanglement in a two-qubit-spin coupled system in the presence of Dzyaloshinskii-Moriya (DM) anisotropic antisymmetric interaction is proposed. Based on a sequence of operations performed periodically on the system, the scheme can preserve the entanglement of the system starting from any initial state with any high precision for any long duration.
description: Accepted by Annals of Physics
Sequencing instruction in chemistry : simulation or traditional first?
Creators: name: Pillay, Sharmila
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this study is to investigate how a technology-enhanced lesson based on the principles of model-based teaching and learning can contribute to student understanding of two challenging topics in chemistry: Le Chatelier’s Principle and Chemical Equilibrium. A computer simulation program was utilized that contained multiple digital representations, such as: a chemical formula view, a slider view, a graph view, a description view, a prediction view, a molecular view and a dynamic analogy view. The study also addressed the sequencing of instruction, changing when computer simulation was introduced in two chemistry 12 classes (n=46). One class of 22 students received instruction in a traditional form (lecture, labs) and then interacted with the simulation and the other class of 24 students interacted with simulations first and then received a traditional form of instruction. Both the classes participated in a pre-test, mid-test, post-test, surveys and interviews designed to assess students’ conceptual understanding of chemical equilibrium. Statistical analysis of the tests revealed that a computer simulation such as Technology-Enhanced Model-Based Science (TEMBS) promoted understanding by supporting the generation of more scientifically accurate models of chemical equilibrium. Secondly, there was a significant improvement in test results of students who received instruction in a traditional form first and then interacted with simulations compared with students who interacted with simulations first and then received traditional instruction. According to the surveys, students in both classes listed teacher discussions in class as one of the three most important contributions to their learning. An implication of this study for science educators and educational technologists is that computer simulations such as TEMBS simulation which utilize multiple representations including a dynamic analogy can assist students in their understanding of abstract concepts such as Le Chatelier’s principle and can be more effective if introduced after a full discussion of the concept and notes.
Comparing star formation models with interferometric observations of the protostar NGC 1333 IRAS 4A. I. Magnetohydrodynamic collapse models
Creators: name: Frau, Pau
name: Galli, Daniele
name: Girart, Josep Miquel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Observations of dust polarized emission toward star forming regions trace the magnetic field component in the plane of the sky and provide constraints to theoretical models of cloud collapse. We compare high-angular resolution observations of the submillimeter polarized emission of the low-mass protostellar source NGC 1333 IRAS 4A with the predictions of three different models of collapse of magnetized molecular cloud cores. We compute the Stokes parameters for the dust emission for the three models. We then convolve the results with the instrumental response of the Submillimeter Array observation toward IRAS 4A. Finally, we compare the synthetic maps with the data, varying the model parameters and orientation, and we assess the quality of the fit by a χ^2 analysis. High-angular resolution observations of polarized dust emission can constraint the physical properties of protostars. In the case of IRAS 4A, the best agreements with the data is obtained for models of collapse of clouds with mass-to-flux ratio >2 times the critical value, initial uniform magnetic field of strength ~0.5 mG, and age of the order of a few 10^4 yr since the onset of collapse. Magnetic dissipation, if present, is found to occur below the resolution level of the observations. Including a previously measured temperature profile of IRAS 4A leads to a more realistic morphology and intensity distribution. We also show that ALMA has the capability of distinguishing among the three different models adopted in this work. Our results are consistent with the standard theoretical scenario for the formation of low-mass stars, where clouds initially threaded by large-scale magnetic fields become unstable and collapse, trapping the field in the nascent protostar and the surrounding circumstellar disk. In the collapsing cloud, the dynamics is dominated by gravitational and magnetic forces.
description: Accepted for publication in Astronomy And Astrophysics. 14 pages, 11 figures, 3 tables. Several the figures are shown at low resolution
Development of Fuel Electrodes for Reversible Solid Oxide Fuel Cell Applications
Creators: name: Addo, Paul
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Chemistry--Physical
subject: Energy
subject: Fuel Cells
subject: Reversible solid oxide fuel cells
subject: Solid oxide electrolysis cells
subject: Electrochemistry
subject: Electrocatalysis
subject: Carbon capture and utilization
subject: Impedance spectroscopy
subject: Perovskites
subject: CO2 electrolysis
subject: Nickel
subject: Renewable Energy

description: The stability, sulfur tolerance, and electrochemical performance of Ni-YSZ (yttria-stabilized zirconia) composites and single phase La0.3M0.7Fe0.7Cr0.3O3-δ (M = Sr, Ca, (LMFCr)) perovskites, for use as fuel electrodes for reversible solid oxide fuel cell (RSOFC) applications, were investigated in detail. RSOFCs are electrochemical devices that can be operated in both the solid oxide fuel cell (SOFC) and solid oxide electrolysis cell (SOEC) modes. Although Ni-YSZ is the most common fuel electrode for RSOFC applications, it is prone to sulfur poisoning in ppm H2S levels at operating temperatures > 650 oC, thereby decreasing the rate of the hydrogen oxidation/reduction reaction (HOR/HER). It is shown that, at ≤ 650 oC, exposure of Ni-YSZ to ≤ 10 ppm H2S unexpectedly enhanced the HOR activity, while at higher temperatures, conventional Ni poisoning was seen. It was concluded that the activation behaviour at ≤ 650 oC was due to the formation of a catalytic Ni-S species (e.g., Ni3S2) at the triple phase boundary where the HOR/HER occurs. The sulfur tolerance of LCFCr electrodes was also investigated in H2 + low ppm H2S, with LCFCr showing the inverse behavior of Ni/YSZ. At > 700 oC, exposure of LCFCr to ≤ 10 ppm H2S activated the HOR/HER, while deactivation was seen at ≤ 700 oC. It was concluded that exposure of LCFCr to H2S at higher temperatures led to an increase in the density of surface FeO2 terminated species, the proposed active site for the HOR/HER. The LSFCr materials were also shown, for the first time, to be very active (comparable or better than other oxide materials (e.g., La1-xSrxCr1-yMnyO3-δ)) and stable electrocatalysts in CO/CO2 gas environments in both the SOFC and SOEC reaction directions at 600-800 oC. LSFCr was shown to be structurally stable in pure CO2 and 70% CO2:30% CO mixtures at 800 oC, with no major impurities detected. Also, extensive electrochemical characterization, based on both 2-electrode and 3-electrode full and half cell configurations, showed that LSFCr was more active as an electrocatalyst for the reduction of CO2 than for the oxidation of CO. Furthermore, it was found that the surface interaction of CO2 with LSFCr (adsorption, dissociation, electron transfer) was the slowest step in the reaction, relative to oxide ion transport processes.
The Quantum Affine Origin of the AdS/CFT Secret Symmetry
Creators: name: de Leeuw, Marius
name: Regelskis, Vidas
name: Torrielli, Alessandro
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We find a new quantum affine symmetry of the S-matrix of the one-dimensional Hubbard chain. We show that this symmetry originates from the quantum affine superalgebra U_q(gl(2|2)), and in the rational limit exactly reproduces the secret symmetry of the AdS/CFT worldsheet S-matrix.
description: 22 pages
Study of Composite Sorbent Pellets for Integration of Calcium Looping and Chemical Looping Combustion
Creators: name: Recio Delgado, Alvaro
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Engineering--Chemical
subject: CCS
subject: Carbon Capture
subject: CO2 Capture
subject: Calcium Looping
subject: Chemical Looping Combustion
subject: Composite Pellets
subject: Sorbent

description: Carbon capture and storage (CCS) technologies were developed to address the problem of increasing CO2 emissions. Two of the most promising technologies are calcium looping (CaL) and chemical looping combustion (CLC). The integration of CaL and CLC has been studied in this thesis with CuO/CaO composite sorbent pellets. The pellets were tested over multiple cycles and the stability in terms of chemical looping combustion was excellent, although agglomeration was observed. In contrast, a significant decay in the rate of CO2 uptake was observed in the first 3-4 cycles. Both a thermal pretreatment and the presence of steam enhanced the stability, while the addition of potassium hydroxide hindered the performance. Steam will be present with the flue gases in an industrial application, and so it is important that steam did not detract from the performance of the pellets.
การสนทนากลุ่มเพื่อศึกษาการยอมรับการขลิบหนังหุ้มปลายอวัยวะเพศเพื่อเป็นวิธีการในการป้องกันการติดเชื้อเอชไอวีในกลุ่มชายที่มีเพศสัมพันธ์กับชาย
Creators: name: ธรีรัตน์ เชมนะสิริ
Publisher: name: กองนวัตกรรมและวิจัย กรมควบคุมโรค
Year: 2553
Subjects: การขลิบหนังหุ้มปลายอวัยวะเพศ
ชายที่มีเพศสัมพันธ์กับชาย
เอชไอวี
สนทนากลุ่ม
ประเทศไทย

description: วารสารควบคุมโรค, 36, 1, 32-41
การพัฒนาทะเบียนผู้ติดเชื้อผู้ป่วยเอดส์ : กรณีศึกษาจังหวัดอำนาจเจริญ
Creators: name: เสถียร เชื้อลี
Publisher: name: กองนวัตกรรมและวิจัย กรมควบคุมโรค
Year: 2553
Subjects: ทะเบียนผู้ติดเชื้อผู้ป่วยเอดส์
จังหวัดอำนาจเจริญ

description: วารสารควบคุมโรค, 36, 2, 42-49
An entropic approach to local realism and noncontextuality
Creators: name: Chaves, Rafael
name: Fritz, Tobias
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: For any Bell locality scenario (or Kochen-Specker noncontextuality scenario), the joint Shannon entropies of local (or noncontextual) models define a convex cone for which the non-trivial facets are tight entropic Bell (or contextuality) inequalities. In this paper we explore this entropic approach and derive tight entropic inequalities for various scenarios. One advantage of entropic inequalities is that they easily adapt to situations like bilocality scenarios, which have additional independence requirements that are non-linear on the level of probabilities, but linear on the level of entropies. Another advantage is that, despite the nonlinearity, taking detection inefficiencies into account turns out to be very simple. When joint measurements are conducted by a single detector only, the detector efficiency for witnessing quantum contextuality can be arbitrarily low.
description: 12 pages, 8 figures, minor mistakes corrected
Reframing an Arctic Image, Out of the Sublime
Creators: name: Thoreson, Kristine
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Art History
subject: Fine Arts
subject: Mass Communications
subject: Education--Art
subject: Literature--Scandinavian and Icelandic
subject: Anthropology--Cultural
subject: Arctic Photography
subject: Contemporary Landscape Photography
subject: Arctic Art

description: A proliferation of sublime, mythic and nearly vacant landscape photographs of Arctic regions are circulating in museums and galleries internationally; artist monographs of these photographs are also readily available in major booksellers. Although the photographs are artfully crafted and technically superior, there is the question of what an accretion of so many sublime landscape images of the North accomplishes in terms of perceptions of place, community and culture? It is true that creating awe-inspiring photographs that promote an appreciation for polar-regions is legitimate work. Yet, taking a wider view of this field of landscape art photography reveals important insights into our beliefs about places. Re-examining the production and circulation of recent photographs will underline ways in which photography creates and sustains place perceptions that in turn inform local and global attitudes about the Arctic. This Social Sciences and Humanities Research Council (SSHRC) funded project presents an in-depth account of three bodies of work by the prominent artists Olaf Otto Becker, Camille Seaman and Tiina Itkonen as well as the contexts within which they are created and presented. It will provide links to historic practices that have informed modern works, an analysis of the notions of place that emerge, and importantly, through research creation it will offer new and alternative approaches to art photography in the Arctic as a result of field work carried out in Ilulissat, Greenland.
A Multicomponent Walkaway Vertical Seismic Profile Experiment in a Heavy Oil Reservoir
Creators: name: Wu, Bona
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Education--Sciences
subject: Geology
subject: FOS: Earth and related environmental sciences
subject: Geophysics
subject: VSP
subject: Multicomponent
subject: AVO
subject: PP-PS joint inversion
subject: reservoir characterization

description: A multicomponent walkaway VSP experiment was successfully processed and used to predict rock properties in a heavy oil reservoir. Post-stack image and pre-stack gathers were made for inversion and AVO analysis. A common shot reflectivity gather was also created for AVO study at the VSP well location. P and S-wave impedance, reflectivity, Vp/Vs and density were studied. AVO attributes and their crossplots were analyzed. Furthermore, AVO Lambda-mu-rho analysis and AVO modeling were conducted. The analyses helped to identify different lithologies and changes of fluids in the target reservoir. The study showed no obvious gas effects in the target interval, a finding validated by production data. The converted-wave data had good resolution. PP-PS joint inversion added more details to P-wave inversion only. This case study demonstrated that multicomponent VSP is an effective tool to predict rock properties, characterize the reservoir, and monitor production.
MPEC 2023-X73 : 2023 XL1
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 XL1

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
ความรู้ เจตคติ และการปฏิบัติของประชาชนไทยในการป้องกันและควบคุมโรคพิษสุนัขบ้า
Creators: name: อภิรมย์ พวงหัตถ์
Publisher: name: กองนวัตกรรมและวิจัย กรมควบคุมโรค
Year: 2553
Subjects: ความรู้
เจตคติ
การปฏิบัติ
การป้องกันและควบคุมโรคพิษสุนัขบ้า
ประชาชนไทย

description: วารสารควบคุมโรค, 36, 1, 50-59
Optical Polarization and Spectral Variability in the M87 Jet
Creators: name: Perlman, Eric S.
name: Adams, Steven C.
name: Cara, Mihai
name: Bourque, Matthew
name: Harris, D. E.
name: Madrid, Juan P.
name: Simons, Raymond C.
name: Clausen-Brown, Eric
name: Cheung, C. C.
name: Stawarz, Lukasz
name: Georganopoulos, Markos
name: Sparks, William B.
name: Biretta, John A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: During the last decade, M87's jet has been the site of an extraordinary variability event, with one knot (HST-1) increasing by over a factor 100 in brightness. Variability was also seen on timescales of months in the nuclear flux. Here we discuss the optical-UV polarization and spectral variability of these components, which show vastly different behavior. HST-1 shows a highly significant correlation between flux and polarization, with P increasing from $\sim 20%$ at minimum to >40% at maximum, while the orientation of its electric vector stayed constant. HST-1's optical-UV spectrum is very hard ($α_{UV-O}\sim0.5$, $F_ν\proptoν^{-α}$), and displays "hard lags" during epochs 2004.9-2005.5, including the peak of the flare, with soft lags at later epochs. We interpret the behavior of HST-1 as enhanced particle acceleration in a shock, with cooling from both particle aging and the relaxation of the compression. We set 2$σ$ upper limits of $0.5 δ$ parsecs and 1.02$c$ on the size and advance speed of the flaring region. The slight deviation of the electric vector orientation from the jet PA, makes it likely that on smaller scales the flaring region has either a double or twisted structure. By contrast, the nucleus displays much more rapid variability, with a highly variable electric vector orientation and 'looping' in the $(I,P)$ plane. The nucleus has a much steeper spectrum ($α_{UV-O} \sim 1.5$) but does not show UV-optical spectral variability. Its behavior can be interpreted as either a helical distortion to a steady jet or a shock propagating through a helical jet.
description: 14 pages, 7 figures, ApJ, in press
อาการปวดปลายประสาทเนื่องจากโรคงูสวัดระยะเฉียบพลันและอาการปวดที่คงอยู่ณ เวลา 3 เดือนในผู้ป่วยคนไทย ณ สถาบันบำราศนราดูร
Creators: name: พรชัย จิระชนากุล
Publisher: name: กองนวัตกรรมและวิจัย กรมควบคุมโรค
Year: 2553
Subjects: อาการปวดปลายประสาท
โรคงูสวัดระยะเฉียบพลัน
สถาบันบำราศนราดูร

description: วารสารควบคุมโรค, 36, 1, 60-65
Thermal Energy Distribution in the Steam Assisted Gravity Drainage
Creators: name: Kyanpour Kalkhajeh, Mohammad
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Engineering--Petroleum
subject: SAGD

description: The volume of heavy oil and bitumen in the oil sands deposits in Western Canada is similar to that of conventional crude oil in the Middle East. This resource is vast but difficult and energy intensive to extract because of its high oil/bitumen viscosity, over 1,000 to 10,000,000 cp at original reservoir conditions. Current commercial thermal recovery processes used are Steam Assisted Gravity Drainage (SAGD), Cyclic Steam Stimulation (CSS) and steam flood. In this study, the focus is on the SAGD process. Currently most completion designs for SAGD are focused on wellbore and very near-wellbore regions and reservoir simulation history matching and forecasts are done using simple sink/source wellbores. In one case the complications of the geological and reservoir heterogeneity are not considered in the design, and in the latter, the impact of completion components on wellbore dynamics is ignored or oversimplified. This study shows that when reservoir and wellbore modeling are coupled, completion designs, history matching and forecasts may change significantly. The difference grows with increased reservoir heterogeneity and complex fluid saturation and properties distribution. The impact of counter-current heat exchange in concentric configuration was found to be significant in reducing the energy delivered to a reservoir section during circulation. The application of Vacuum Insulated Tubing (VIT) with properly insulated couplings was shown to be promising in reducing the counter-current heat exchange. Thermal energy distribution during thermal start up and true SAGD stages is key to obtaining high performance bitumen recovery. A synthetic parameter called Oil Production Potential (OPP) was derived to be used as a guide to distribute energy along the SAGD wells. A novel method/workflow was presented that identifies high and low potential reservoir sections to introduce heat to a reservoir accordingly. This workflow was used to design and implement SAGD wellbore completions in Senlac, Saskatchewan. The field results supported the design workflow and showed significant improvement over conventional completion design methodologies that emphasize on wellbore and very near-wellbore regions only.
Effects of Higher Education Policy and Planning on a Campus Women's Centre and the Provision of Safer Space
Creators: name: Carroll, Melanie
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Education--Higher
subject: Education--Sociology of
subject: WomenÕs Studies
subject: safer space
subject: student engagement
subject: Student Services
subject: feminist activism
subject: campus feminism
subject: universities and colleges
subject: women's centre
subject: safe space
subject: women's center

description: Since the 1970s, higher education has increasingly been coordinated by discourses of quality control, return on public investment, and student engagement. Concurrently, social justice movements have demanded attention to access and inclusion of systematically disadvantaged groups. One way universities have addressed these demands is through designated services. This research investigates one such service, a women’s centre, and its struggle to survive during the retrenchment of women’s movement gains and rise of student engagement measures. Using institutional ethnography, I discover how extralocal texts for student engagement, primarily the National Survey of Student Engagement, shaped university priorities, were activated by local administrators, and created the conditions to amalgamate the women’s centre with a centre for community-engaged learning. Administrators’ actions, thus, effectively damaged the very engagement they were trying to create by prioritizing extralocal discourses over the local practices of community building, safer space, and engagement already developed within the women’s centre.