cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Simulation of an optically induced asymmetric deformation of a liquid-liquid interface
Creators: name: Chraibi, Hamza
name: Lasseux, Didier
name: Arquis, Eric
name: Wunenburger, Régis
name: Delville, Jean-Pierre
Publisher: name: arXiv
Year: 2009
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Deformations of liquid interfaces by the optical radiation pressure of a focused laser wave were generally expected to display similar behavior, whatever the direction of propagation of the incident beam. Recent experiments showed that the invariance of interface deformations with respect to the direction of propagation of the incident wave is broken at high laser intensities. In the case of a beam propagating from the liquid of smaller refractive index to that of larger one, the interface remains stable, forming a nipple-like shape, while for the opposite direction of propagation, an instability occurs, leading to a long needle-like deformation emitting micro-droplets. While an analytical model successfully predicts the equilibrium shape of weakly deformed interface, very few work has been accomplished in the regime of large interface deformations. In this work, we use the Boundary Integral Element Method (BIEM) to compute the evolution of the shape of a fluid-fluid interface under the effect of a continuous laser wave, and we compare our numerical simulations to experimental data in the regime of large deformations for both upward and downward beam propagation. We confirm the invariance breakdown observed experimentally and find good agreement between predicted and experimental interface hump heights below the instability threshold.
Circulating tumour DNA as a comprehensive multi-omic tool for profiling advanced prostate cancer
Creators: name: Herberts, Cameron
Publisher: name: University of British Columbia
Year: 2024

description: Life-prolonging targeted therapies exploiting genomic vulnerabilities are now standard-of-care in metastatic castration-resistant prostate cancer (mCRPC). However, consensus on optimal patient selection—including choice of molecular profiling—remains unestablished. Plasma cell-free DNA (cfDNA) is an established minimally-invasive tool for real-time profiling and may facilitate genomic stratification of mCRPC. In this thesis, next-generation sequencing was applied to cfDNA and tumour tissue to define the population frequencies and clinicogenomic properties of therapeutically-relevant mCRPC molecular subtypes: activating AKT1/PIK3CA mutations, mismatch-repair deficiency (MMRd), and DNA repair defects in BRCA2/CDK12/ATM. Targeted ctDNA sequencing detected AKT1/PIK3CA mutations in 6% of mCRPC. Clonal prevalence, consistent temporal redetection across serial cfDNA, and mutant-allele imbalance indicate PI3K pathway dependency in select patients. MMRd (4%) was identifiable in ctDNA via multiple correlated metrics of genome-scarring, and was associated with mutation-enabled oncogene activation, heightened subclonal diversity, and poor response to AR-targeted treatment. Defects in BRCA2/CDK12/ATM (15%) involved biallelic inactivation in most patients, suggesting driver etiology. Tumour suppressors were controlled via deleterious rearrangements in BRCA2-defective samples but via (negative-feedback) oncogene amplification in context of CDK12 defects. BRCA2/CDK12/ATM defects were re-detected across 94% of serial ctDNA and in all archival primary tissues, indicating origination prior to metastatic dissemination. BRCA2 and CDK12 (but not ATM) was associated with poor clinical outcomes. Optimized targeted cfDNA testing necessitates understanding of the dynamic clonal composition of bulk ctDNA. We performed deep whole-genome sequencing (WGS) of serial plasma and synchronous metastases, revealing ctDNA populational diversity involving variable whole-genome duplication and shifts in mutational processes. Although tissue and ctDNA harboured concordant clonally expanded driver alterations, most individual metastases contributed only a minor share of total ctDNA. By comparing serial ctDNA before and after progression on AR pathway inhibitors, we reveal population restructuring converging solely on AR augmentation as the dominant genomic driver of acquired treatment resistance. Finally we leverage ctDNA nucleosome footprints to infer metastatic tissue mRNA abundance, including treatment-induced changes in AR transcription factor signaling. In this context, my thesis informs future precision oncology clinical trial design and ctDNA testing strategies, and establishes serial ctDNA WGS as a discovery tool for understanding complex metastatic tumour biology.
Transformations of $W$-Type Entangled States
Creators: name: Kıntaş, S.
name: Turgut, S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The transformations of $W$-type entangled states by using local operations assisted with classical communication are investigated. For this purpose, a parametrization of the $W$-type states which remains invariant under local unitary transformations is proposed and a complete characterization of the local operations carried out by a single party is given. These are used for deriving the necessary and sufficient conditions for deterministic transformations. A convenient upper bound for the maximum probability of distillation of arbitrary target states is also found.
description: 7 pages
Transient dynamics and momentum redistribution in cold atoms via recoil-induced resonances
Creators: name: Greenberg, Joel A.
name: Gauthier, Daniel J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We use an optically dense, anisotropic magneto-optical trap to study recoil-induced resonances (RIRs) in the transient, high-gain regime. We find that two distinct mechanisms govern the atomic dynamics: the finite, frequency-dependent atomic response time, and momentum-space population redistribution. At low input probe intensities, the residual Doppler width of the atoms, combined with the finite atomic response time, result in a linear, transient hysteretic effect that modifies the locations, widths, and magnitudes of the resulting gain spectra depending on the sign of the scan chirp. When larger intensities (\textit{i.e.}, greater than a few $μ$W/cm$^2$) are incident on the atomic sample for several $μ$s, hole-burning in the atomic sample's momentum distribution leads to a coherent population redistribution that persists for approximately 100 $μ$s. We propose using RIRs to engineer the atomic momentum distribution to enhance the nonlinear atom-photon coupling. We present a numerical model, and compare the calculated and experimental results to verify our interpretation.
description: 7 pages, 6 figures
Full text seeker
Creators: name: Bruce, Tracy
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 460912
subject: Knowledge and information management
classificationCode: 461099
subject: Library and information studies not elsewhere classified

description: This macro-enabled spreadsheet for Windows Excel describes a process for retrieving full text documents, and generates clickable search links. It will not work on Mac Excel.It takes a user's Zotero CSV file and pre-populates search strings with title and DOI information for easier retrieval of large numbers of documents when completing a systematic review. Version 5 now highlights the active row on the results page for easier navigating. Note that since this file has macros, you will need to right-click the file in your Downloads, select Properties, and tick the Unblock option in Security before opening it, to allow the macros to run.
Local orientational ordering in fluids of spherical molecules with dipolar-like anisotropic adhesion
Creators: name: Gazzillo, Domenico
name: Fantoni, Riccardo
name: Giacometti, Achille
Publisher: name: arXiv
Year: 2009
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We discuss some interesting physical features stemming from our previous analytical study of a simple model of a fluid with dipolar-like interactions of very short range in addition to the usual isotropic Baxter potential for adhesive spheres. While the isotropic part is found to rule the global structural and thermodynamical equilibrium properties of the fluid, the weaker anisotropic part gives rise to an interesting short-range local ordering of nearly spherical condensation clusters, containing short portions of chains having nose-to-tail parallel alignment which runs antiparallel to adjacent similar chains.
description: 13 pages and 6 figures
The Quantum Reduced Action In Higher Dimensions
Creators: name: Bouda, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The solution with respect to the reduced action of the one-dimensional stationary quantum Hamilton-Jacobi equation is well known in the literature. The extension to higher dimensions in the separated variable case was proposed in contradictory formulations. In this paper we provide new insights into the construction of the reduced action. In particular, contrary to the classical mechanics case, we analytically show that the reduced action constructed as a sum of one variable functions does not contain a complete information about the quantum motion. In the same context, we also make some observations about recent results concerning quantum trajectories. Finally, we will examine the conditions in which microstates appear even in the case where the wave function is complex.
description: 12 pages, no figure
title: No Difference in Corticosterone Concentrations Between Missouri Three-Toed Box Turtles Living in an Urban and a Rural Site
Creators: name: Lamczyk, Bennett A.
name: Palmer, Jamie L.
name: Kozlowski, Corinne P.
name: Blake, Stephen
name: Deem, Sharon L.
Publisher: name: Utah State University
Year: 2022

description: Baseline health data for species of conservation concern are important for understanding threats to the long-term viability of populations. One indication of health is physiological stress among individuals. Corticosterone (CORT) is frequently used to quantify stress in free-living reptile populations, as high values may be associated with reduced fitness. Herein, we describe and validate methods for quantifying blood CORT levels in three-toed box turtles (Terrapene mexicana triunguis). We subsequently use this information to evaluate stress levels in 2 populations of free-living three-toed box turtles in Missouri, USA. To our knowledge, this is the first quantification of CORT levels in the three-toed box turtle. In 2012 we collected blood samples from 11 three-toed box turtles in human care at the Saint Louis Zoological Park (zoo), St. Louis, Missouri for assay validation, and from 2012 to 2016 we collected 220 samples from 144 free-living three-toed box turtles at 2 sites, 1 urban and 1 rural. In the zoo turtles, mean CORT concentration was 0.71 ± 0.10 ng/mL. Following a handling experiment, CORT concentration increased to 3.14 ± 0.72 ng/mL (P = 0.011). Mean CORT levels between free-living turtles at the urban and rural sites did not differ (urban = 0.54 ± 0.08 ng/mL, rural = 0.37 ± 0.02 ng/mL, F pr = 0.12). Sex did not influence CORT levels (F pr = 0.29). These results suggest that the turtles living in the urban environment did not experience chronic elevated glucocorticoid production and supports urban parks as potential habitat for box turtles.
Attractor and Basin Entropies of Random Boolean Networks Under Asynchronous Stochastic Update
Creators: name: Shreim, Amer
name: Berdahl, Andrew
name: Greil, Florian
name: Davidsen, Jörn
name: Paczuski, Maya
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: Other Quantitative Biology (q-bio.OT)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We introduce a numerical method to study random Boolean networks with asynchronous stochas- tic update. Each node in the network of states starts with equal occupation probability and this probability distribution then evolves to a steady state. Nodes left with finite occupation probability determine the attractors and the sizes of their basins. As for synchronous update, the basin entropy grows with system size only for critical networks, where the distribution of attractor lengths is a power law. We determine analytically the distribution for the number of attractors and basin sizes for frozen networks with connectivity K = 1.
description: 5 pages, 3 figures, in submission
Nanomedicine-mediated prevention of inflammatory monocytes infiltration ameliorate ovalbumin-induced allergic rhinitis in mouse model
Creators: name: Gu, Xiaofeng
name: Xiao, Feng
name: Lu, Wenmin
name: Xu, Ying
name: Li, Xia
name: Yu, Chenjie
name: Cui, Xinyan
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Marine Biology
subject: Cancer

description: Th2 immune cells infiltration into nasal mucosa is one of the characters of allergic rhinitis (AR). We aimed to explore whether inhibition of Th2 immune cells infiltration would attenuate AR progression. AR mouse model was established by i.p. injection of ovalbumin (OVA). The infiltrated immune cells into nasal lavage fluid were detected by flow cytometry. Cytokine concentration in serum was determined by ELISA. AR mice symptoms were indicated by the number of sneezing and nasal rubbing events. In AR mice, CCL2 expression levels and CD45+CD11b+Ly6Chi inflammatory monocytes cells significantly increased as compared with control mice. CCL2 siRNA encapsulated nanoparticles (NPsiCCL2) prevent CCL2 expression and inflammatory monocytes infiltration in AR mice. NPsiCCL2 treatment dramatically decreased the number of sneezing and nasal rubbing events in AR mice. Moreover, NPsiCCL2 treatment attenuated serum OVA-specific IgE, OVA-specific IgG1 and histamine levels. Mechanically, NPsiCCL2 treatment attenuates AR symptoms via inhibiting Th2 cytokine (IL-4, IL-5 and IL-13) production. Nanomedicine-mediated prevention of inflammatory monocytes infiltration ameliorates ovalbumin-induced allergic rhinitis in mouse model.
Adaptive Optics Echelle Spectroscopy of [Fe II] 1.644 um in the RW Aur Jet: A Narrow Slice Down the Axis of the Flow
Creators: name: Hartigan, P.
name: Hillenbrand, L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present new adaptive optics echelle spectra of the near-infrared [Fe II] lines in the redshifted and blueshifted jets from the T Tauri star RW Aur. The spectra have an unprecedented combination of high spatial and spectral resolution that makes it possible to trace the dynamics of the flow to a projected distance of only 10 AU from the source. As noted by previous studies, the redshifted flow is much slower than its fainter blueshifted counterpart. Our observations clearly show that both the radial velocities and the emission line widths are larger closer to the source on both sides of the jet. The line widths are 20% - 30% of the jet velocity on both sides of the flow, significantly larger than would be produced by a divergent constant velocity flow. The observed line widths could arise from a layered velocity structure in the jet or from magnetic waves. A bright knot in the redshifted jet has no concomitant increase in line width, implying that it is not heated by a bow shock. Alternate heating mechanisms include planar shocks, ambipolar diffusion and magnetic reconnection.
Mapping in silico genetic networks of tumour suppressor genes to uncover novel gene functions and predict cancer cell vulnerabilities
Creators: name: Takemon, Yuka
Publisher: name: University of British Columbia
Year: 2024

description: Sequencing technologies have advanced the discovery of cancer-related genes. However, the functional impact of mutations in these genes and the effect of their mutated forms on a cell’s ability to withstand additional perturbations is unclear. Tumour suppressor genes are cancer-associated genes frequently acquiring loss-of-function (LOF) alterations, rendering them ineffective drug targets. Therefore, alternative methods for identifying druggable targets in cancer cells harbouring LOF alterations in tumour suppressor genes are needed. Genetic networks, namely essentiality and genetic interaction (GI) networks, have been used to attribute novel biological functions to genes and identify genotype-specific vulnerabilities, respectively. However, the low-throughput and laborious nature of in vitro genetic screens have hampered efforts to characterise cancer-associated genetic networks. In this thesis, I explored the use of in silico genetic network mapping to characterise biological functions of tumour suppressor genes and reveal possible vulnerabilities in cells harbouring LOF mutations in these genes. First, I developed a computational tool for generating genetic network maps and provided proof-of-concept using a case study on ARID1A, whose GI and protein complex interactions have been well characterised. Next, I mapped the in silico genetic networks of two tumour suppressor genes, CIC and KMT2D. To characterise CIC’s biological functions, I collaborated to perform multi-omic analyses and revealed new interactions with SWItch/Sucrose Non-Fermentable (SWI/SNF) complex members and a novel potential role in maintaining mitotic integrity. I also characterised KMT2D’s genetic and proteomic interaction networks, identifying potential roles associated with mitotic processes, metabolism, DNA repair, and immune response and predicting several synthetic lethal genetic interactors that are targets of approved or preclinical drugs, including WRN, MDM2, NDUFB5, and TUBA1B. Additionally, I found that markers for immune checkpoint inhibitor (ICI) response, including TUBA1B expression, were elevated in KMT2D-LOF cases with microsatellite instability (MSI) but not in KMT2D wildtype MSI cases in two cancer patient cohorts, indicating that KMT2D-LOF could be a potential biomarker to stratify patients to ICI treatment. The research presented in this thesis thus shows the value of interrogating genetic networks of cancer-associated genes and contributes to our understanding of tumour suppressor gene functions and cancer cell vulnerabilities.
Effect of aging on the reinforcement efficiency of carbon nanotubes in epoxy matrix
Creators: name: Allaoui, Aïssa
name: Evesque, Pierre
name: Bai, Jinbo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The reinforcement efficiency of carbon nanotubes (CNTs) in epoxy matrix was investigated in the elastic regime. Cyclic uniaxial tensile tests were performed at constant strain amplitude and increasing maximum strain. Post-curing of the epoxy and its composite at a temperature close to the glass transition temperature allowed us to explore the effect of aging on the reinforcement efficiency of CNT. It is found that the reinforcement efficiency is compatible with a mean field mixture rule of stress reinforcement by random inclusions. It also diminishes when the maximum strain increased and this effect is amplified by aging. The decrease of elastic modulus with increasing cyclic maximum strain is quite similar to the one observed for filled elastomers with increasing strain amplitude, a phenomenon often referred as the Payne effect.
We Development Draft
Creators: name: To, Archie
Publisher: name: HSSCommons
Year: 2023
Subjects: Web development
draft

description:
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Alternative Data Reduction Procedures for UVES: Wavelength Calibration and Spectrum Addition
Creators: name: Thompson, Rodger I.
name: Bechtold, Jill
name: Black, John H.
name: Martins, C. J. A. P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper addresses alternative procedures to the ESO supplied pipeline procedures for the reduction of UVES spectra of two quasar spectra to determine the value of the fundamental constant mu = Mp/Me at early times in the universe. The procedures utilize intermediate product images and spectra produced by the pipeline with alternative wavelength calibration and spectrum addition methods. Spectroscopic studies that require extreme wavelength precision need customized wavelength calibration procedures beyond that usually supplied by the standard data reduction pipelines. An example of such studies is the measurement of the values of the fundamental constants at early times in the universe. This article describes a wavelength calibration procedure for the UV-Visual Echelle Spectrometer on the Very Large Telescope, however, it can be extended to other spectrometers as well. The procedure described here provides relative wavelength precision of better than 3E-7 for the long-slit Thorium-Argon calibration lamp exposures. The gain in precision over the pipeline wavelength calibration is almost entirely due to a more exclusive selection of Th/Ar calibration lines.
description: Accepted for publication in New Astronomy
Relativistic theory of tidal Love numbers
Creators: name: Binnington, Taylor
name: Poisson, Eric
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In Newtonian gravitational theory, a tidal Love number relates the mass multipole moment created by tidal forces on a spherical body to the applied tidal field. The Love number is dimensionless, and it encodes information about the body's internal structure. We present a relativistic theory of Love numbers, which applies to compact bodies with strong internal gravities; the theory extends and completes a recent work by Flanagan and Hinderer, which revealed that the tidal Love number of a neutron star can be measured by Earth-based gravitational-wave detectors. We consider a spherical body deformed by an external tidal field, and provide precise and meaningful definitions for electric-type and magnetic-type Love numbers; and these are computed for polytropic equations of state. The theory applies to black holes as well, and we find that the relativistic Love numbers of a nonrotating black hole are all zero.
description: 25 pages, 8 figures, many tables; final version to be published in Physical Review D
A Magnetic Model for the Ordered Double Perovskites
Creators: name: Sanyal, Prabuddha
name: Majumdar, Pinaki
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We construct an effective spin model from the coupled spin-fermion problem appropriate to double perovskites of the form A_2BB'O_6. The magnetic model that emerges is reminiscent of double exchange and we illustrate this `reduction' in detail for the case of perfect B-B' structural order, i.e, no antisite disorder. We estimate the effective exchange between the magnetic B ions in terms of the electronic parameters, study the `classical' magnetic model using Monte Carlo techniques, and compare this approach to a full numerical solution of the spin-fermion problem. The agreement is reasonable, and promises a quick estimate of magnetic properties when coupled with ab initio electronic structure. The scheme generalises to the presence of antisite disorder.
description: 12 pages latex, 10 figs
Additional file 1 of Correlation between osteoprotegerin and coronary artery calcification in diabetic subjects: a systematic review of observational studies
Creators: name: Vazirian, Fatemeh
name: Sadeghi, Masoumeh
name: Wang, Dongdong
name: Javidi Dashtbayaz, Reza
name: Gholoobi, Arash
name: Samadi, Sara
name: Mohammadpour, Amir Hooshang
Publisher: name: figshare
Year: 2023
Subjects: subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy
subject: Hematology

description: Additional file 1. Appendix 1: PRISMA 2020 Checklist. Appendix 2: search strategy. Appendix 3: NOS assessment of the studies.
Bandwidth and dynamic range of a widely tunable Josephson parametric amplifier
Creators: name: Castellanos-Beltran, M. A.
name: Irwin, K. D.
name: Vale, L. R.
name: Hilton, G. C.
name: Lehnert, K. W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The ability to manipulate quantum information encoded in microwave fields has led to a renewed interest in Josephson parametric amplifiers (JPAs). For these applications the ability of JPAs to amplify signals with the least amount of added noise is critical. Unfortunately JPAs are typically narrow band amplifiers with small dynamic range. It is therefore important to understand the bandwidth and dynamic range of any particular JPA in order to determine if it is appropriate for these applications. We recently introduced a new kind of JPA. Although it is still narrow band, the amplified band can be tuned over a full octave. We have shown that it has good noise performance and can squeeze the vacuum noise by 10 dB. Here we characterize other important parameters of this amplifier, specifically the signal-bandwidth, dynamic range and saturation power.
description: Accepted for publication in IEEE Transactions on Applied Superconductivity; Special Issue from the Applied Superconductivity Conference
Dressed Qubits in Nuclear Spin Baths
Creators: name: Wu, Lian-Ao
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We present a method to encode a \textit{dressed} qubit into the product state of an electron spin localized in quantum dot and its surrounding nuclear spins via a dressing transformation. In this scheme, the hyperfine coupling and a portion of nuclear dipole dipole interaction become logic gates, while they are the sources of decoherence in electron spin qubit proposals. We discuss errors and corrections for the dressed qubits. Interestingly, the effective Hamiltonian of nuclear spins is equivalent to a pairing Hamiltonian, which provides the microscopic mechanism to protect dressed qubits against decoherence.
description: 5 pages, no figures,
Electron density in the quiet solar coronal transition region from SoHO/SUMER measurements of S VI line radiance and opacity
Creators: name: Buchlin, E.
name: Vial, J. -C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context: The sharp temperature and density gradients in the coronal transition region are a challenge for models and observations. Aims: We set out to get linearly- and quadratically-weighted average electron densities in the region emitting the S VI lines, using the observed opacity and the emission measure of these lines. Methods: We analyze SoHO/SUMER spectroscopic observations of the S VI lines, using the center-to-limb variations and radiance ratios to derive the opacity. We also use the Emission Measure derived from radiance at disk center. Results: We get an opacity at S VI line center of the order of 0.05. The resulting average electron density is 2.4 10^16 m^-3 at T = 2 10^5 K. This value is higher than the values obtained from radiance measurements. Conversely, taking a classical value for the density leads to a too high value of the thickness of the emitting layer. Conclusions: The pressure derived from the Emission Measure method compares well with previous determinations and implies a low opacity of 5 10^-3 to 10^-2. The fact that a direct derivation leads to a much higher opacity remains unexplained, despite tentative modeling of observational biases. Further measurements need to be done, and more realistic models of the transition region need to be used.
description: 11 pages, 9 figures
iSSEE: IMS Sensors Search Engine Enabler for Sensors Mashups Convergent Application
Creators: name: Outtagarts, Abdelkader
name: Martinot, Olivier
Publisher: name: arXiv
Year: 2009
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Integrating the sensing capabilities in Internet Protocol network will open the opportunities to build a wide range of novel multimedia applications. The problem when using sensors (e.g. temperature sensor, camera, audio, humidity, etc.) connected to the network is to know dynamically at any time if they are always connected or not, what type of data they can transmit and where they are geographically located. This paper describes an application enabler: IMS Sensor Search Engine Enabler (iSSEE), which allows IMS applications using sensors and IMS based devices, to get information about the sensor availability, its location and the type of the sensor. Using data collected by sensors and from the web, mash-ups convergent applications use cases are proposed by combining the contents from heterogeneous data.
description: International Journal of Computer Science Issues, IJCSI Volume 6, Issue 1, pp1-7, November 2009
Von Neumann Turbulent Transport Model
Creators: name: Katz, J. I.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: I propose a simple model, based on an analogy to von Neumann artificial viscosity, of turbulent diffusion, heat diffusion and viscosity coefficients for use in modeling subgrid turbulent diffusivity in multi-phase numerical hydrodynamics and, more generally, in subgrid turbulent viscosity and thermal transport. In analogy to the von Neumann artificial viscosity, these coefficients explicitly contain the grid size and do not attempt a quantitative model of the unresolved turbulence. In order to address the problem that it is often not known a priori when and where a flow will become turbulent, the coefficients are set to zero when the flow is not expected to be turbulent on the basis of a Richardson/Rayleigh-Taylor stability criterion, in analogy to von Neumann's setting of artificial viscosity to zero in expanding flows.
description: 9 pp., no figures
Air pollution, green space and dementia risk in Canada
Creators: name: Yuchi, Weiran
Publisher: name: University of British Columbia
Year: 2024

description: Dementia is a major global population health challenge. It is not curable, and severity worsens over time. With seniors expected to comprise approximately 25% of the Canadian population by 2035, cases of dementia and its related health and financial burden are forecast to dramatically increase in the next decades. While some well-known risk factors for dementia are identified (e.g. age, sex), they do not fully explain dementia risk, therefore other potentially modifiable risk factors may be unidentified. Mounting evidence suggests connections between environmental factors and dementia, however associations between exposure to air pollution and dementia have not been adequately studied, nor have the potential protective effects of residing in neighbourhoods with more natural green space. To address these gaps, we investigated the links between long-term exposure to air pollution (e.g. fine particulate matter, PM₂ꓸ₅; nitrogen dioxide, NO₂), dementia, and the possible beneficial impacts from green space (Normalized Difference Vegetation Index) within three large population-based cohorts. In the Metro Vancouver cohort, air pollutants were associated with incidence of non-Alzheimer’s dementia (e.g., hazard ratios (HR) of 1.02 [0.98-1.05], 1.02 [0.99-1.06] per interquartile range increase in PM₂ꓸ₅ and NO₂). In the national 2001 Canadian Census Health and Environment Cohort, PM₂ꓸ₅ (1.09 [95% CI:1.08-1.10] per interquartile range increase) and NO₂ (1.08 [95% CI:1.07-1.09]) were associated with dementia mortality. These findings were supported by analysis of the Canadian Community Health Survey where individual behavioural risk factors (smoking, alcohol consumption, etc.) were available. Air pollutants were associated with increased dementia mortality (e.g., dementia HR of 1.25 [1.23-1.27] and 1.23 [1.21-1.25] per interquartile range increase in PM₂ꓸ₅ and NO₂, while HRs were attenuated (1.14 [1.12-1.16] and 1.17 [1.15-1.19]) in models including behavioural risk factors. Across the three cohorts, greenness was associated with 1-5% risk reduction in dementia. These results indicate that air pollution, even at relatively low concentrations, was linked with dementia, while living in greener areas was found to have some small protective effects. These findings contribute to the overall understanding of the relationships between built-in environment factors and dementia and can contribute to the development of public health approaches for dementia risk reduction.
Potential and Limitations of the Archaeo-Geophysical Techniques
Creators: name: Shopov, Yavor
name: Stoykova, Diana
name: Petrova, Antoniya
name: Vasilev, Valentin
name: Tsankov, Ludmil
Publisher: name: arXiv
Year: 2009
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: This work demonstrates the potential and the limitations of archaeo-geophysical techniques available at the Archaeological Geophysics Laboratory of the Department of Physics at the University of Sofia with various case studies in natural and artificial environment. Special attention is focused on GPR which is the most powerful archaeogeophysical technique This laboratory is the only one in Bulgaria, which develops new geophysical techniques and equipment for survey of archaeological sites and their dating.
Magnetic Branes in Brans-Dicke-Maxwell Theory
Creators: name: Sheykhi, A.
name: Ebrahimi, E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a new class of magnetic brane solutions in $(n+1)$-dimensional Brans-Dicke-Maxwell theory in the presence of a quadratic potential for the scalar field. These solutions are neither asymptotically flat nor (anti)-de Sitter. Our strategy for constructing these solutions is applying a conformal transformation to the corresponding solutions in dilaton gravity. This class of solutions represents a spacetime with a longitudinal magnetic field generated by a static brane. They have no curvature singularity and no horizons but have a conic geometry with a deficit angle $δ$. We generalize this class of solutions to the case of spinning magnetic brane with all rotation parameters. We also use the counterterm method and calculate the conserved quantities of the solutions.
description: 15 pages, Accepted for publication in IJTP
title: Analyse d'effets de la restriction de vente de boissons alcooliques à l'emporter entrée en vigueur au 1er juillet 2015 dans le canton de Vaud (Art. 5 LADB)
title: Analyses secondaires de données hospitalières
titleType: Subtitle
title: Analyse d'effets de la restriction de vente de boissons alcooliques à l'emporter entrée en vigueur au 1er juillet 2015 dans le canton de Vaud (Art. 5 LADB)
titleType: AlternativeTitle
Creators: name: Wicki, Matthias
name: Gmel, Gerhard
name: Kuendig, Hervé
name: Addiction Suisse
Publisher: name: Addiction Suisse
Year: 2018

description: Autres auteurs : Schneider, Eva Bertholet, Nicolas Faouzi, Mohammed
(Re)mapping youth mobilities and citizenships with young adult literature
Creators: name: Hamilton, Caroline
Publisher: name: University of British Columbia
Year: 2024

description: As critical geographers and mobilities scholars argue, the potential to access and participate in everyday spaces is conditional and unevenly distributed, entwined with issues of social justice and citizenship. Questions of access and engagement are especially salient to studies with adolescents, who, within Western frameworks, occupy a political and cultural space subject to distinct spatial regulations and exclusions. Literature classrooms offer promising sites in which adolescent students might critically interrogate these spatial practices and understandings. To date, however, few literature education and literacy scholars have adopted spatial frameworks in their research with young adult (YA) texts and young people. In this qualitative, classroom-based case study, I extend discussions of place and identity in YA literature to explore how Grade 10 students employed methods of spatial literary analysis to reflect on their everyday mobilities and lived citizenships alongside those of adolescent protagonists. Framing their reflections as critical spatial stories, I illuminate how three focal students (re)mapped their movements and engagements across fluid spaces of home, school, and public spheres. Drawing on critical research in geography, mobilities studies, and literacy education, I consider how spatial literary engagement might expand opportunities for young people to articulate and (re)imagine the ways they engage in and transform their everyday communities. This study presents implications for adolescent literacy and literature education practices and pedagogies. As I argue, the critical spatial stories that emerged from focal students’ work illustrate the power of the literature classroom as a site wherein students might disrupt unjust geographical imaginations of young people and reenvision their engagements across local and global, private and public worlds.
Gamma-Ray Bursts in the Swift Era
Creators: name: Gehrels, N.
name: Ramirez-Ruiz, E.
name: Fox, D. B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: With its rapid-response capability and multiwavelength complement of instruments, the Swift satellite has transformed our physical understanding of gamma-ray bursts (GRBs). Providing high-quality observations of hundreds of bursts, and facilitating a wide range of follow-up observations within seconds of each event, Swift has revealed an unforeseen richness in observed burst properties, shed light on the nature of short-duration bursts, and helped realize the promise of GRBs as probes of the processes and environments of star formation out to the earliest cosmic epochs. These advances have opened new perspectives on the nature and properties of burst central engines, interactions with the burst environment from microparsec to gigaparsec scales, and the possibilities for non-photonic signatures. Our understanding of these extreme cosmic sources has thus advanced substantially; yet more than 40 years after their discovery, GRBs continue to present major challenges on both observational and theoretical fronts.
description: 67 pages, 16 figures; ARAA, 2009; http://arjournals.annualreviews.org/toc/astro/47/1
A combinatorial approach to coarse geometry
Creators: name: Cencelj, M.
name: Dydak, J.
name: Vavpeti\v\{c}, A.
name: Virk, \v\{Z}.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Metric Geometry (math.MG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 54F45, 55M10

description: Using ideas from shape theory we embed the coarse category of metric spaces into the category of direct sequences of simplicial complexes with bonding maps being simplicial. Two direct sequences of simplicial complexes are equivalent if one of them can be transformed to the other by contiguous factorizations of bonding maps and by taking infinite subsequences. That embedding can be realized by either Rips complexes or analogs of Roe's anti-\v\{C}ech approximations of spaces. In that model the asymptotic dimension being at most n means that for each k there is m > k such that the bonding map from K_k to K_m factors (up to contiguity) through an n-dimensional complex. One can give a similar characterization of Property A of G.Yu. Using our approach we give a simple proof of a characterization of geodesic spaces that are coarsely equivalent to simplicial trees (a result of Fujiwara and Whyte).
description: 18 pages
First evidence of a magnetic field on Vega. Towards a new class of magnetic A-type stars
Creators: name: Lignieres, F.
name: Petit, P.
name: Bohm, T.
name: Auriere, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the detection of a magnetic field on Vega through spectropolarimetric observations. We acquired 257 Stokes V, high signal-to-noise and high-resolution echelle spectra during four consecutive nights with the NARVAL spectropolarimeter at the 2-m Telescope Bernard Lyot of Observatoire du Pic du Midi (France). A circularly polarized signal in line profiles is unambiguously detected after combining the contribution of about 1200 spectral lines for each spectrum and summing the signal over the 257 spectra. Due to the low amplitude of the polarized signal, various tests have been performed to discard the possibility of a spurious polarized signal. They all point towards a stellar origin of the polarized signal. Interpreting this polarization as a Zeeman signature leads to a value of $-0.6 \pm 0.3$ G for the disk-averaged line-of-sight component of the surface magnetic field. This is the first strong evidence of a magnetic field in an A-type star which is not an Ap chemically peculiar star. Moreover, this longitudinal magnetic field is smaller by about two orders of magnitude than the longitudinal magnetic field (taken at its maximum phase) of the most weakly magnetic Ap stars. Magnetic fields similar to the Vega magnetic field could be present but still undetected in many other A-type stars.
description: 4 pages, accepted for publication as a Letter in Astronomy & Astrophysics
Emotions in Pervasive Computing Environments
Creators: name: Jungum, Nevin Vunka
name: Laurent, Eric
Publisher: name: arXiv
Year: 2009
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: The ability of an intelligent environment to connect and adapt to real internal sates, needs and behaviors' meaning of humans can be made possible by considering users' emotional states as contextual parameters. In this paper, we build on enactive psychology and investigate the incorporation of emotions in pervasive systems. We define emotions, and discuss the coding of emotional human markers by smart environments. In addition, we compare some existing works and identify how emotions can be detected and modeled by a pervasive system in order to enhance its service and response to users. Finally, we analyze closely one XML-based language for representing and annotating emotions known as EARL and raise two important issues which pertain to emotion representation and modeling in XML-based languages.
description: International Journal of Computer Science Issues, IJCSI Volume 6, Issue 1, pp8-22, November 2009
On the GBDT version of the Bäcklund-Darboux transformation and its applications to the linear and nonlinear equations and Weyl theory
Creators: name: Sakhnovich, Alexander
Publisher: name: arXiv
Year: 2009
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37K35, 34B20, 47A48, 37K10, 47A40

description: A general theorem on the GBDT version of the Bäcklund-Darboux transformation for systems rationally depending on the spectral parameter is treated and its applications to nonlinear equations are given. Explicit solutions of direct and inverse problems for Dirac-type systems, including systems with singularities, and for the system auxiliary to the $N$-wave equation are reviewed. New results on explicit construction of the wave functions for radial Dirac equation are obtained.
On constant U_q(sl_2)-invariant R-matrices
Creators: name: Bytsko, Andrei
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: The spectral resolution of a U_q(sl_2)-invariant solution R of the constant Yang-Baxter equation in the braid group form is considered. It is shown that, if the two highest coefficients in this resolution are not equal, then R is either the Drinfeld R-matrix or its inverse.
description: LaTeX, 7 pages.
Evidence for strongly coupled charge-density-wave ordering in three-dimensional RE5Ir4Si10 compounds by optical measurements
Creators: name: Tediosi, Riccardo
name: Carbone, Fabrizio
name: Kuzmenko, A. B.
name: Teyssier, J.
name: van der Marel, D.
name: Mydosh, J. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report optical spectra of Lu$_5$Ir$_4$Si$_{10}$ and Er$_5$Ir$_4$Si$_{10}$, exhibiting the phenomenon of coexisting superconductivity or antiferromagnetism and charge density wave (CDW) order. We measure the maximum value of the charge density wave gap present on part of the Fermi surface of Lu5Ir4Si10, corresponding to a ratio 2Δ/k_B T_CDW \approx 10, well above the value in the limit of weak electron-phonon coupling. Strong electron-phonon coupling was confirmed by analyzing the optical conductivity with the Holstein model describing the electron-phonon interactions, indicating the coupling to phonons centered at 30 meV, with a coupling constant λ\approx 2.6. Finally we provide evidence that approximately 16 % of the Fermi surface of Lu5Ir4Si10 becomes gapped in the CDW state.
description: 11 pages, 14 figures