cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Enfermedad Neuromuscular: ¿puede ayudar el radiólogo?
Creators: name: Guisasola Iñiguez, Amaia
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Genetic defects
subject: Connective tissue disorders
subject: Outcomes analysis
subject: MR
subject: Musculoskeletal soft tissue

description: Objetivos
Material y método
Resultados
Conclusiones
Bibliografía
description: Objetivos:
GENERALIDADES: -Revision del protocolo de RM de cuerpo entero: secuencias,
conocimientos básicos... -Patrones básicos de patología en RM de cuerpo entero. RETROSPECTIVO 10 AÑOS: -Analizamos las RM de cuerpo entero realizadas en el intervalo de...
Direct bandgap optical transitions in Si nanocrystals
Creators: name: Prokofiev, A. A.
name: Moskalenko, A. S.
name: Yassievich, I. N.
name: de Boer, W. D. A. M.
name: Timmerman, D.
name: Zhang, H.
name: Buma, W. J.
name: Gregorkiewicz, T.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effect of quantum confinement on the direct bandgap of spherical Si nanocrystals has been modelled theoretically. We conclude that the energy of the direct bandgap at the $Γ$-point decreases with size reduction: quantum confinement enhances radiative recombination across the direct bandgap and introduces its "red" shift for smaller grains. We postulate to identify the frequently reported efficient blue emission (F-band) from Si nanocrystals with this zero-phonon recombination. In a dedicated experiment, we confirm the "red" shift of the F-band, supporting the proposed identification.
title: Manejo de incidentalomas en abdomen.
Creators: name: Sánchez Hernández, Javier
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Abdomen

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
- Analizar el impacto ocasionado por el creciente número de incidentalomas visualizados en los estudios abdominales. - Revisar los protocolos y guías de práctica clínica disponibles con el fin de unificar los criterios a seguir en el manejo de...
Thermodynamic properties of a dipolar Fermi gas
Creators: name: Zhang, J. -N.
name: Yi, S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Based on the semi-classical theory, we investigate the thermodynamic properties of a dipolar Fermi gas. Through a self-consistent procedure, we numerically obtain the phase space distribution function at finite temperature. We show that the deformations in both momentum and real space becomes smaller and smaller as one increases the temperature. For homogeneous case, we also calculate pressure, entropy, and heat capacity. In particular, at low temperature limit and in weak interaction regime, we obtain an analytic expression for the entropy, which agrees qualitatively with our numerical result. The stability of a trapped gas at finite temperature is also explored.
Exact Asymptotics of Bivariate Scale Mixture Distributions
Creators: name: Hashorva, Enkelejd
Publisher: name: arXiv
Year: 2009
Subjects: subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 60F05, 60G70

description: Let (RU_1, R U_2) be a given bivariate scale mixture random vector, with R>0 being independent of the bivariate random vector (U_1,U_2). In this paper we derive exact asymptotic expansions of the tail probability P{RU_1> x, RU_2> ax}, a \in (0,1] as x tends infintiy assuming that R has distribution function in the Gumbel max-domain of attraction and (U_1,U_2) has a specific tail behaviour around some absorbing point. As a special case of our results we retrieve the exact asymptotic behaviour of bivariate polar random vectors. We apply our results to investigate the asymptotic independence and the asymptotic behaviour of conditional excess for bivariate scale mixture distributions.
description: 14 pages
Description of Superdeformed Nuclei in the A~190 Region by Generalized Deformed su_{q}(2)
Creators: name: Alharbi, H. H.
name: Alhendi, H. A.
name: Alhakami, F. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The generalised deformed su_{q}(2) model is applied to 79 superdeformed bands in the region A~190. The transition energies and the moments of inertia are calculated within the model, Its validity is investigated by comparing it with the experimental data. Both the standard su_{q}(2) and the generalized one fail to account for the uprising and the downturn of the dynamic moment of inertia. Both models, however, show remarkable agreement with the available experimental data at low angular frequancy (hw <= 0.25MeV).
description: 4 pages, 1 figure
Molecular Clouds as Cosmic-Ray Barometers
Creators: name: Casanova, S.
name: Aharonian, F. A.
name: Fukui, Y.
name: Gabici, S.
name: Jones, D. I.
name: Kawamura, A.
name: Onishi, T.
name: Rowell, G.
name: Torii, K.
name: Yamamoto, H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The advent of high sensitivity, high resolution gamma-ray detectors, together with a knowledge of the distribution of the atomic hydrogen and especially of the molecular hydrogen in the Galaxy on sub-degree scales creates a unique opportunity to explore the flux of cosmic rays in the Galaxy. We here present the new data on the distribution of the molecular hydrogen from a large region of the inner Galaxy obtained by the NANTEN Collaboration. We then introduce a methodology which aims to provide a test bed for current and future gamma-ray observatories to explore the cosmic ray flux at various positions in our Galaxy. In particular, for a distribution of molecular clouds, as provided by the NANTEN survey, and local cosmic ray density as measured at the Earth, we estimate the expected GeV to TeV gamma-ray signal, which can then be compared with observations and use to test the cosmic ray flux.
description: PASJ (in press)
Vibrationally Mediated Control of Single Electron Transmission in Weakly Coupled Molecule-Metal Junctions
Creators: name: Olsen, Thomas
name: Schiøtz, Jakob
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We propose a mechanism which allows one to control the transmission of single electrons through a molecular junction. The principle utilizes the emergence of transmission sidebands when molecular vibrational modes are coupled to the electronic state mediating the transmission. We will show that if a molecule-metal junction is biased just below a molecular resonance one may induce the transmission of a single electron by externally exciting a vibrational mode of the molecule. The analysis is quite general but requires that the molecular orbital does not hybridize strongly with the metallic states. As an example we perform a density functional theory (DFT) analysis of a benzene molecule between two Au(111) contacts and show that exciting a particular vibrational mode can give rise to transmission of a single electron
title: Microfinance as an Effective Development Solution: The Case of Mongolia
Creators: name: Adams, Kjersten
Publisher: name: Utah State University
Year: 2012

description: Microfinance is increasingly looked at as a development solution for countries around the world. Its development and practice in former communist countries, however, has been relatively unexplored. This study seeks to fill this gap by asking how the practice and operation of microfinance in Mongolia compare to global best practices. Using global best practice frameworks regarding regulatory and organizational environments for microfinance, data gathered from surveys and onsite training observations at Xacbank is used to assess Mongolia's financial sector and its relative compliance to said practices. The analysis helps address the question of whether microfinance has helped or hindered Mongolian economic development. I find that while Mongolia's formal and informal social and regulatory environment compares relatively well to global best practice frameworks, the adoption of microfinance and growth of the microfinancial sector has led to unanticipated broad level institutional changes in Mongolia's financial regulatory sector that are conducive to economic development. Despite such changes, improvements in the country regulatory and business context still need to be made to _ make Mongolia more attractive to foreign investors and domestic entrepreneurs. Ideas for further research include determining other possible events or movements that could have impacted financial industry reform, the effect of the global financial environment on the Mongolia, and the advancement of microfinance and the financial industry in other transitioning economies.
Review and interpretation of the new heavy states discovered at the $B$-factories
Creators: name: Nielsen, Marina
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I discuss some recent discoveries in the spectroscopy of the charmonium-like resonances, and some of their theoretical interpretations are reviewed.
description: 7 pages. For the proceedings of the 8th Conference Quark Confinement and the Hadron Spectrum
Power dissipation for systems with junctions of multiple quantum wires
Creators: name: Agarwal, Amit
name: Das, Sourin
name: Sen, Diptiman
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study power dissipation for systems of multiple quantum wires meeting at a junction, in terms of a current splitting matrix (M) describing the junction. We present a unified framework for studying dissipation for wires with either interacting electrons (i.e., Tomonaga-Luttinger liquid wires with Fermi liquid leads) or non-interacting electrons. We show that for a given matrix M, the eigenvalues of M^T M characterize the dissipation, and the eigenvectors identify the combinations of bias voltages which need to be applied to the different wires in order to maximize the dissipation associated with the junction. We use our analysis to propose and study some microscopic models of a dissipative junction which employ the edge states of a quantum Hall liquid. These models realize some specific forms of the M-matrix whose entries depends on the tunneling amplitudes between the different edges.
description: 9 pages, 4 figures; made several minor changes; this is the published version
Early-time Searches for Coherent Radio Emission from Short GRBs with the Murchison Widefield Array
Creators: name: Tian, J.
name: Anderson, G. E.
name: Hancock, P. J.
name: Miller-Jones, J. C. A.
name: Sokolowski, M.
name: Rowlinson, A.
name: Williams, A.
name: Morgan, J.
name: Hurley-Walker, N.
name: Kaplan, D. L.
name: Murphy, Tara
name: Tingay, S. J.
name: Johnston-Hollitt, M.
name: Bannister, K. W.
name: Bell, M. E.
name: Meyers, B. W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Here we present a low frequency (170-200MHz) search for coherent radio emission associated with nine short GRBs detected by the Swift and/or Fermi satellites using the Murchison Widefield Array (MWA) rapid-response observing mode. The MWA began observing these events within 30 to 60s of their high-energy detection, enabling us to capture any dispersion delayed signals emitted by short GRBs for a typical range of redshifts. We conducted transient searches at the GRB positions on timescales of 5s, 30s and 2min, resulting in the most constraining flux density limits on any associated transient of 0.42, 0.29, and 0.084Jy, respectively. We also searched for dispersed signals at a temporal and spectral resolution of 0.5s and 1.28MHz but none were detected. However, the fluence limit of 80-100Jy ms derived for GRB 190627A is the most stringent to date for a short GRB. We compared the fluence and persistent emission limits to short GRB coherent emission models, placing constraints on key parameters including the radio emission efficiency of the nearly merged neutron stars ($\lesssim10^{-4}$), the fraction of magnetic energy in the GRB jet ($\lesssim2\times10^{-4}$), and the radio emission efficiency of the magnetar remnant ($\lesssim10^{-3}$). Comparing the limits derived for our full GRB sample to the same emission models, we demonstrate that our 30-min flux density limits were sensitive enough to theoretically detect the persistent radio emission from magnetar remnants up to a redshift of $z\sim0.6$. Our non-detection of this emission could imply that some GRBs in the sample were not genuinely short or did not result from a binary neutron star merger, the GRBs were at high redshifts, these mergers formed atypical magnetars, the radiation beams of the magnetar remnants were pointing away from Earth, or the majority did not form magnetars but rather collapse directly into black holes.
description: Accepted for publication in PASA
Cosmological rolling solutions of nonlocal theories
Creators: name: Calcagni, Gianluca
name: Nardelli, Giuseppe
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We find nonperturbative solutions of a nonlocal scalar field equation, with cubic or exponential potential on a cosmological background. The former case corresponds to the lowest level effective tachyon action of cubic string field theory. While the well known Minkowski solution is wildly oscillating, due to Hubble friction its cosmological counterpart describes smooth rolling towards the local minimum of the potential.
description: 10 pages, 3 figures. v2: discussion expanded, references added.
Enrichment of heavy metal cadmium in maize farmland ecosystem .xlsx
Creators: name: Chen, Jinshui
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 410201
subject: Bioavailability and ecotoxicology

description: The contamination of farmland soil with heavy metals has a considerable impact on the equilibrium of farmland ecosystems and on food security and green production. It is beneficial to examine the transfer and accumulation of heavy metals in farmland ecosystems to effectively mitigate the effects of heavy metals on ecosystems and human health. In this study, ten maize varieties were planted in slightly contaminated land and investigated for heavy metal enrichment at different periods and in different tissues, as well as in different insects. The concentration of Cd in the test field was determined to be 3.73 times the risk screening value for Cd as defined by the Chinese control standard. Although the capacity for Cd enrichment differed among the maize varieties, the majority demonstrated a trend whereby the flowering and milking stages exhibited the greatest enrichment, followed by the heading stage and the seedling stage. The greatest enrichment was observed in the roots, followed by the leaves, the stems, and the kernels. The concentration of heavy metals in insects within maize ecosystems ranged from 0.060 to 0.523 mg/kg. The species Dolycoris baccarum, a sucking-type pest, and Apis mellifera, a pollinating insect, exhibited the greatest enrichment of Cd. Additionally, Cd can be transferred along the food chain to Harmonia axyridis. The concentration of Cd in the larvae of Ostrinia furnacalis was found to be proportional to the level of heavy metal contamination in the maize stems they consumed. This study elucidated the enrichment pattern and bottom-up effects of Cd in soil-maize-insect ecosystems, thereby furnishing fundamental data for the ecological effects of heavy metals.
Approximate bound state solutions of Dirac equation with Hulthén potential including Coulomb-like tensor potential
Creators: name: Ikhdair, Sameer M.
name: Sever, Ramazan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We solve the Dirac equation approximately for the attractive scalar $S(r)$ and repulsive vector $V(r)$ Hulthén potentials including a Coulomb-like tensor potential with arbitrary spin-orbit coupling quantum number $κ.$ In the framework of the spin and pseudospin symmetric concept, we obtain the analytic energy spectrum and the corresponding two-component upper- and lower-spinors of the two Dirac particles by means of the Nikiforov-Uvarov method in closed form. The limit of zero tensor coupling and the non-relativistic solution are obtained. The energy spectrum for various levels is presented for several $κ$ values under the condition of exact spin symmetry in the presence or absence of tensor coupling.
description: 28 pages
Dependence between Bayesian neural network units
Creators: name: Vladimirova, Mariia
name: Arbel, Julyan
name: Girard, Stéphane
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The connection between Bayesian neural networks and Gaussian processes gained a lot of attention in the last few years, with the flagship result that hidden units converge to a Gaussian process limit when the layers width tends to infinity. Underpinning this result is the fact that hidden units become independent in the infinite-width limit. Our aim is to shed some light on hidden units dependence properties in practical finite-width Bayesian neural networks. In addition to theoretical results, we assess empirically the depth and width impacts on hidden units dependence properties.
Viscous Hydrodynamic Predictions for Nuclear Collisions at the LHC
Creators: name: Luzum, Matthew
name: Romatschke, Paul
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Hydrodynamic simulations are used to make predictions for the integrated elliptic flow coefficient v_2 in sqrt(s)=5.5 TeV lead-lead and sqrt(s)=14 TeV proton-proton collisions at the LHC. We predict a 10% increase in v_2 from RHIC to Pb+Pb at LHC, and v_2 ~ 0 in p+p collisions unless eta/s < 0.08.
description: 5 pages, 2 figures; v2: version accepted for publication in PRL
Cottager characteristics and their effects on cottage use and services : implications for regional policy
Creators: name: Moritz, Paul Richard
Publisher: name: University of British Columbia
Year: 2010

description: The continuing growth in the demand for recreational land for cottaging purposes within a day's drive of major urban centres, together with the increasing scarcity of suitable land, have important environmental and economic implications, particularly for regional governments charged with responsibility for planning land use and settlement density within their jurisdictions. Where cottage developments have been regulated at all, regional authorities have tended to assume that cottagers are uniform in their desires and in their potential impact upon the surrounding areas, and have developed their policies accordingly. This study explores the possibility that, on the contrary, cottagers have different desires that, if recognized, would lead to the adoption of policies designed to foster a variety of cottage areas with distinctive features. Using four cottage areas in the Princeton region of British Columbia as a case study, this thesis investigates whether the cottager population has changed in recent years and then examines the relationship between the characteristics of cottage owners, the intensity of cottage use and recreational activity, and the level of services desired. The data is gathered by means of a survey questionnaire mailed to all the property owners in the four cottage areas. It was found that cottage owners are more occupationally diverse than they were a decade ago, and that certain patterns of summer occupancy and activity level are apparent. However, no significant correlation was found between cottager characteristics and owners' desires for services, although certain trends were evident. In light of these findings, three policy alternatives are advanced for consideration by regional or provincial governments: the large lot approach; the cluster hamlet; and the rental cottage village. The pros and cons of each are assessed in terms of environmental and economic impact, the desires of cottagers as expressed in the questionnaire returns, and the potential for satisfying the growing demand for cottaging. Finally, suggestions are made for further research.
title: Business Intelligence Tools in a Developmental Environment: An Academic Module
Creators: name: Hemsley, Landon M.
Publisher: name: Utah State University
Year: 2011

description: Business Intelligence (BI), defined here as the creation and use of meaningful business information for management, has over the last 20 years shown over and over again its value to professional industry. The prevalence of BI has also demonstrated that a new brand of worker is needed to take advantage of the sophisticated tools available to modern industry. Evidence suggests modern universities have struggled to educate professionals on the tremendous impact BI can have on an organization if used properly. This work is a step in an endeavor to bridge that educational gap and generate an educational strategic advantage by providing a module to be used in current information systems courses.
Observing the anisotropic optical response of the heavy-fermion compound UNi2Al3
Creators: name: Ostertag, Julia P.
name: Scheffler, Marc
name: Dressel, Martin
name: Jourdan, Martin
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The optical conductivity of heavy fermions can reveal fundamental properties of the charge carrier dynamics in these strongly correlated electron systems. Here we extend the conventional techniques of infrared optics on heavy fermions by measuring the transmission and phase shift of THz radiation that passes through a thin film of UNi2Al3, a material with hexagonal crystal structure. We deduce the optical conductivity in a previously not accessible frequency range, and furthermore we resolve the anisotropy of the optical response (parallel and perpendicular to the hexagonal planes). At frequencies around 7cm^-1, we find a strongly temperature-dependent and anisotropic optical conductivity that - surprisingly - roughly follows the dc behavior.
description: 3 pages, 2 figures, accepted for proceedings of QCnP 2009
The inverse conjecture for the Gowers norm over finite fields via the correspondence principle
Creators: name: Tao, Terence
name: Ziegler, Tamar
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 11T06, 37A15

description: The inverse conjecture for the Gowers norms $U^d(V)$ for finite-dimensional vector spaces $V$ over a finite field $\F$ asserts, roughly speaking, that a bounded function $f$ has large Gowers norm $\|f\|_{U^d(V)}$ if and only if it correlates with a phase polynomial $ϕ= e_\F(P)$ of degree at most $d-1$, thus $P: V \to \F$ is a polynomial of degree at most $d-1$. In this paper, we develop a variant of the Furstenberg correspondence principle which allows us to establish this conjecture in the large characteristic case $\charac(F) \geq d$ from an ergodic theory counterpart, which was recently established by Bergelson and the authors. In low characteristic we obtain a partial result, in which the phase polynomial $ϕ$ is allowed to be of some larger degree $C(d)$. The full inverse conjecture remains open in low characteristic; the counterexamples by Lovett-Meshulam-Samorodnitsky or Green-Tao in this setting can be avoided by a slight reformulation of the conjecture.
description: 21 pages, no figures, to appear, Analysis & PDE. This is the final version, incorporating the referee's corrections
Remnant Masses, Spins and Recoils from the Merger of Generic Black-Hole Binaries
Creators: name: Lousto, Carlos O.
name: Campanelli, Manuela
name: Zlochower, Yosef
name: Nakano, Hiroyuki
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We obtain empirical formulae for the final remnant black hole mass, spin, and recoil velocity from merging black-hole binaries with arbitrary mass ratios and spins. Our formulae are based on the mass ratio and spin dependence of the post-Newtonian expressions for the instantaneous radiated energy, linear momentum, and angular momentum, as well as the ISCO binding energy and angular momentum. The relative weight between the different terms is fixed by amplitude parameters chosen through a least-squares fit of recently available fully nonlinear numerical simulations. These formulae can be used for statistical studies of N-body simulations of galaxy cores and clusters, and the cosmological growth of supermassive black holes. As an example, we use these formulae to obtain a universal spin magnitude distribution of merged black holes and recoil velocity distributions for dry and hot/cold wet mergers. We also revisit the long term orbital precession and resonances and discuss how they affect spin distributions before the merging regime.
description: 15 pages, 2 figures. Rewritten and added new section.
Supersymmetric vacua of mass-deformed M2-brane theory
Creators: name: Kim, Hee-Cheol
name: Kim, Seok
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We count the supersymmetric vacua of mass-deformed N=6 U(N)xU(N) Chern-Simons-matter theory by calculating the Witten index. When the Chern-Simons level k is 1, our result perfectly agrees with that from the gravity dual, given by partitions of N. For general k, our index generalizes partitions of N, including additional degrees. We also comment on non-relativistic superconformal theories constructed from this model.
description: 18 pages, 1 figure, v2: figure improved, added references, relation to LLM geometry explained.
Generation of analytic semigroup for some generalized diffusion operators in Lp-spaces
Creators: name: Labbas, Rabah
name: Maingot, Stéphane
name: Thorel, Alexandre
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider five different abstract Cauchy problems where the operator is of fourth order. For each problem, using semigroups techniques and functional calculus, we study the invertibility and the spectral properties of the fourth order operator to show that it generates an analytic semigroup.
description: Mathematische Annalen, Springer Verlag, 2021
Simple Treatments of the Photon Noise and the Pixelation Effect in Weak Lensing
Creators: name: Zhang, Jun
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We propose easy ways of correcting for the systematic errors caused by the photon noise and the pixelation effect in cosmic shear measurements. Our treatment of noise can reliably remove the noise contamination to the cosmic shear even when the flux density of the noise is comparable with those of the sources. For pixelated images, we find that one can accurately reconstruct their corresponding continuous images by interpolating the logarithms of the pixel readouts with either the Bicubic or the Bicubic Spline method. The cosmic shears measured from the interpolated continuous images contain negligible systematic errors as long as the pixel size is about less than the scale size of the point spread function (PSF, including the pixel response function), a condition which is almost always satisfied in practice. Our methodology is well defined regardless of the morphologies of the galaxies and the PSF. Despite that our discussion is based on the shear measurement method of Zhang (2008), our way of treating the noise can in principle be considered in other methods, and the interpolation method that we introduce for reconstructing continuous images from pixelated ones is generally useful for digital image processing of all purposes.
description: 11 pages, 9 figs, MNRAS in press. A discussion about the Poisson photon counting noise is added
Catalan modernism and E. d’Ors ideology of noucentisme
Creators: name: Maingon, Louis
Publisher: name: University of British Columbia
Year: 2010

description: In this thesis we have attempted to demonstrate that Noucentisme, as defined and propugnated by Eugeni d'Ors in the Glosari 1906-1910 is a continuation of the first Catalan Modernism. This theory has in great part been influenced by research on this subject compiled by the late Eduard Valentf, in his book, KL primer modernising Catalan y_ sus fundamen- tos ideol6gicos. We have, therefore, greatly relied on his generational and theological definition of Catalan Modernism, which we elaborate upon and sum up in the first two chapters. Owing to the extensive nature of Houcentisme, as of any literary movement, we have restricted our research to the work of its originator and theoretician, Eugeni d'Ors. In our thesis we have tried to point out that d'Ors reacted against the "fin de siecle" literary movements, which were a degenerate form of the original Catalan Modernist grouping, represented by L'Avenc.that was dispersed aflter 1893. In order to demonstrate that d'Ors absorbed, reorganized, and modified Catalan literary modernism, we have proceeded by closely examining the greater part of his work and ideology between 1900 and 1910, as well as most posterior writings concerning this period of. his development. In Chapter IV ye have studied his so-called modernist writings produced between 1900 and 1905, and collected in La muerte de Isidre Nonell seguida de otras arbitrariedades,'. From these we have determined the basic "modernist" ideas forwarded by d'Ors during those years. Between Chapter V and Chapter VII we have delineated the aesthetic and political ideology which d'Ors considers to be the basis of Noucentisme, and which was primitively contained in La muerte de Isidre Nonell seguida de otras arbitrariedades. In Chapter Till we have examined the direct relations between d'Ors theories and the modernist writers. The explicit formal relation between Modernism and Noucentisme is briefly discussed in the conclusion.
title: Bioclimatic Design Guidelines: A Valuable Tool for Landscape Architects
Creators: name: Reyes Romero, Laura Patricia
Publisher: name: Utah State University
Year: 2012

description: This research project aims to create awareness, among landscape architects, on the importance of ecological design. Bioclimatic knowledge contributes to enhance the coexistence between natural and built environments, resulting in healthy places with high quality of life. The study examines ways of graphically representing climate information, to facilitate the understanding and application of bioclimatic design strategies for human comfort. Cache Valley, Utah is used as an example to demonstrate how extensive data can be represented graphically in a more readable and useful manner for practicing professionals. Temperature, humidity, wind and solar information were analyzed and converted into graphics through methods of bioclimatic analysis. The outcome is a recollection of graphic design guidelines to specific climate conditions, in this case Cache Valley, Utah. The resulting design guidelines will aid professionals to design sensitive spaces that minimize energy consumption while maximizing human comfort.
Additional file 2 of Brain regions involved in fractional amplitude of low-frequency fluctuation in cluster headache patients: a resting-state functional MRI study
Creators: name: Chen, Yun
name: Xing, Xinbo
name: Dai, Wei
name: Tian, Lixia
name: Dong, Zhao
name: Yu, Shengyuan
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Cancer
subject: Mental Health

description: Additional file 2: Supplementary Table 1. The general characteristics of the cluster headache (CH) and control groups. Supplementary Table 2. Characteristics of cluster headache (CH). Supplementary Table 3. Accompanying symptoms of cluster headache (CH). Supplementary Table 4. The Correlations between clinical characteristics and fALFF values of abnormal brain regions in left CH patients. Supplementary Table 5. The Correlations between clinical characteristics and fALFF values of abnormal brain regions in right CH patients.
title: Women's Experiences During the Wars of the Roses
Creators: name: Van Engelenhoven, Mackenzie
Publisher: name: Utah State University
Year: 2012

description: This paper will discuss the lived experiences of women of the English nobility and gentry during the period between 1450 and 1485, which covers the end of the Hundred Year's War to the end of the Wars of the Roses. It will focus on the vulnerabilities associated with various stages of life of a medieval woman, including childhood, marriage, childbearing, and widowhood, as well as the added vulnerabilities associated with political affiliations at the time of civil war. A woman's experience in medieval England was highly dependent upon her social status, marital status, husband's political affiliations, and her legal rights. These factors also affect our modern perception as women as victims of the Wars of the Roses. As this conflict was mostly a war of the nobility and since the majority of the records of women that exist from this era only detail the experiences of noble women, the existing information about women during the Wars of the Roses is primarily about those in the upper ranks of society. It is this record of the elite that will serve as the topic of my essay.
Relative rates of fluid advection, elemental diffusion and replacement govern reaction front patterns
Creators: name: Koehn, Daniel
name: Piazolo, Sandra
name: Beaudoin, Nicolas
name: Kelka, Ulrich
name: Spruženiece, Liene
name: Putnis, Christine
name: Toussaint, Renaud
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Replacement reactions during fluid infiltration into porous media, rocks and buildings are known to have important implications for reservoir development, ore formation as well as weathering. Natural observations and experiments have shown that in such systems the shape of reaction fronts can vary significantly ranging from smooth, rough to highly irregular. It remains unclear what process-related knowledge can be derived from these reaction front patterns. In this contribution we show a numerical approach to test the effect of relative rates of advection, diffusion and reaction on the development of reaction fronts patterns in granular aggregates with permeable grain boundaries. The numerical model takes (i) fluid infiltration along permeable grain boundaries, (ii) reactions and (iii) elemental diffusion into account. We monitor the change in element concentration within the fluid, while reactions occur at a pre-defined rate as a function of the local fluid concentration. In non-dimensional phase space using P{é}clet and Damk{ö}hler numbers, results show that there are no rough fronts without advection (P{é}clet<70) nor if the reaction is too fast (Damk{ö}hler>10-3). As advection becomes more dominant and reaction slower, roughness develops across several grains with a full microstructure mimicking replacement in the most extreme cases. The reaction front patterns show an increase in roughness with increasing P{é}clet number from P{é}clet 10 to 100 but then a decrease in roughness towards higher P{é}clet numbers controlled by the Damk{ö}hler number. Our results indicate that reaction rates are crucial for pattern formation and that the shape of reaction fronts is only partly due to the underlying transport mechanism.
Dysdera mordax L. Koch 1882
Creators: name: Bosmans
name: Van Keer,
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Dysderidae
Dysdera
Dysdera mordax

description: Dysdera mordax L. Koch, 1882 (Fig. 17) Dysdera mordax L. Koch, 1882: 640, pl. 20, fig. 20. Type material Holotype male of Dysdera mordax from Spain, Baleares, Mallorca, Palma, beginning of May, Schaufuss leg. (ZMB 7905); examined, but both palps are absent. Comments In absence of the palps, a complete new diagnosis of this species cannot be given. In Mallorca, Dysdera crocata C. L. Koch, 1838 is the commonest Dysdera species (authors’ personal observations) and the holotype of Dysdera mordax was compared with this species. In D. mordax, the rugosity of the prosoma and the sternum is different and the colour is more burgundy red. Spination of the holotype may be incomplete, but no spines are observed on legs I and II (probably lost), leg IV has 2 basal spines on the femora, legs III–IV have 2 pairs of lateral spines and 1 pair of ventral spines on the tibia, and several spines on the metatarsi. In D. crocota tibiae III–IV have fewer spines. For the male palp we must rely on the figure of KOCH (1882; see Fig. 1). The bulb is similar to that of Dysdera crocota, but more slender, narrowing terminally and more pointed. We consider it a valid species, but topotypic material is needed for a complete redescription. Distribution So far, the species is an endemic to Mallorca.
description: Published as part of Bosmans & Van Keer, 2012, On the spider species described by L. Koch in 1882 from the Balearic Islands (Araneae), pp. 5-16 in Arachnologische Mitteilungen 43 (1) on page 6, DOI: 10.5431/aramit4306, http://zenodo.org/record/556090
description: {"references": ["Koch L. (1882): Zoologische Ergebnisse von excursionen auF den Balearen. II: Arachniden und MYriapoden. - Verhandlungen der zoologisch-botanischen GesellschaFt in Wien 31: 625 - 678"]}
Markov Chain Beam Randomization: a study of the impact of PLANCK beam measurement errors on cosmological parameter estimation
Creators: name: Rocha, G.
name: Pagano, L.
name: Górski, K. M.
name: Huffenberger, K. M.
name: Lawrence, C. R.
name: Lange, A. E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We introduce a new method to propagate uncertainties in the beam shapes used to measure the cosmic microwave background to cosmological parameters determined from those measurements. The method, which we call Markov Chain Beam Randomization, MCBR, randomly samples from a set of templates or functions that describe the beam uncertainties. The method is much faster than direct numerical integration over systematic `nuisance' parameters, and is not restricted to simple, idealized cases as is analytic marginalization. It does not assume the data are normally distributed, and does not require Gaussian priors on the specific systematic uncertainties. We show that MCBR properly accounts for and provides the marginalized errors of the parameters. The method can be generalized and used to propagate any systematic uncertainties for which a set of templates is available. We apply the method to the Planck satellite, and consider future experiments. Beam measurement errors should have a small effect on cosmological parameters as long as the beam fitting is performed after removal of 1/f noise.
description: 17 pages, 23 figures, revised version with improved explanation of the MCBR and overall wording. Accepted for publication in Astronomy and Astrophysics (to appear in the Planck pre-launch special issue)
Valence-shell photoelectron circular dichroism of ruthenium(iii)-tris-(acetylacetonato) gas-phase enantiomers
Creators: name: Darquie, Benoit
name: Saleh, Nidal
name: Tokunaga, Sean K.
name: Srebro-Hooper, Monika
name: Ponzi, Aurora
name: Autschbach, Jochen
name: Decleva, Piero
name: Garcia, Gustavo A.
name: Crassous, Jeanne
name: Nahon, Laurent
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Chiral transition-metal complexes are of interest in many fields ranging from asymmetric catalysis and molecular materials science to optoelectronic applications or fundamental physics including parity violation effects. We present here a combined theoretical and experimental investigation of gas-phase valence-shell photoelectron circular dichroism (PECD) on the challenging open-shell ruthenium(iii)-tris-(acetylacetonato) complex, Ru(acac)$_3$. Enantiomerically pure $Δ$- or $Λ$-Ru(acac)$_3$, characterized by electronic circular dichroism (ECD), were vaporized and adiabatically expanded to produce a supersonic beam and photoionized by circularly-polarized VUV light from the DESIRS beamline at Synchrotron SOLEIL. Photoelectron spectroscopy (PES) and PECD experiments were conducted using a double imaging electron/ion coincidence spectrometer, and compared to density functional theory (DFT) and time-dependent DFT (TDDFT) calculations. The open-shell character of Ru(acac)$_3$, which is not taken into account in our DFT approach, is expected to give rise to a wide multiplet structure, which is not resolved in our PES signals but whose presence might be inferred from the additional striking features observed in the PECD curves. Nevertheless, the DFT-based assignment of the electronic bands leads to the characterisation of the ionized orbitals. In line with other recent works, the results confirm that PECD persists independently on the localization and/or on the achiral or chiral nature of the initial orbital, but is rather a probe of the molecular potential as a whole. Overall, the measured PECD signals on Ru(acac)$_3$, a system exhibiting D$_3$ propeller-type chirality, are of similar magnitude compared to those on asymmetric-carbon-based chiral organic molecules which constitute the vast majority of species investigated so far, thus suggesting that PECD is a universal mechanism, inherent to any type of chirality.
The slip deficit on the North Anatolian Fault (Turkey) in the Marmara Sea: insights from paleoseismicity, seismicity and geodetic data
Creators: name: Meghraoui, M.
name: Toussaint, Renaud
name: Aksoy, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The North Anatolian Fault experienced large earthquakes with 250-400 years recurrence time. In the Marmara Sea region, the 1999 (Mw = 7.4) and the 1912 (Mw = 7.4) earthquake ruptures bound the Central Marmara Sea fault segment. Using historical-instrumental seismicity catalogue and paleoseismic results (~2000-year database), the mapped fault segments, fault kinematic and GPS data, we compute the paleoseismic-seismic moment rate and geodetic moment rate. A clear discrepancy appears between the moment rates and implies a significant delay in the seismic slip along the fault in the Marmara Sea. The rich database allows us to identify and model the size of the seismic gap and related fault segment and estimate the moment rate deficit. Our modeling suggest that the locked Central Marmara Sea fault segment even including a creeping section bears a moment rate deficit $M_d = 6.4 \times 10^{17}$ N.m./yr that corresponds to Mw ~ 7.4 for a future earthquake with an average ~3.25 m coseismic slip. Taking into account the uncertainty in the strain accumulation along the 130-km-long Central fault segment, our estimate of the seismic slip deficit being ~10 mm/yr implies that the size of the future earthquake ranges between Mw = 7.4 and 7.5.
ULTRACAM observations of two accreting white dwarf pulsators
Creators: name: Copperwheat, C. M.
name: Marsh, T. R.
name: Dhillon, V. S.
name: Littlefair, S. P.
name: Woudt, P. A.
name: Warner, B.
name: Steeghs, D.
name: Gaensicke, B. T.
name: Southworth, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we present high time-resolution observations of GW Librae and SDSS J161033.64-010223.3 -- two cataclysmic variables which have shown periodic variations attributed to non-radial pulsations of the white dwarf. We observed both these systems in their quiescent states and detect the strong pulsations modes reported by previous authors. The identification of further periodicities in GW Lib is limited by the accretion-driven flickering of the source, but in the case of SDSS 1610 we identify several additional low-amplitude periodicities. In the case of SDSS 1610, there is evidence to suggest that the two primary signals have a different colour dependence, suggesting that they may be different spherical harmonic modes. We additionally observed GW Lib during several epochs following its 2007 dwarf nova outburst: the first time a dwarf nova containing a pulsating white dwarf has been observed in such a state. We do not observe any periodicities, suggesting that the heating of the white dwarf had either switched-off the pulsations entirely, or reduced their relative amplitude in flux to the point where they are undetectable. Further observations eleven months after the outburst still do not show the pulsation modes previously observed, but do show the emergence of two new periodic signals. In addition to the WD pulsations, our observations of GW Lib in quiescence show a larger-amplitude modulation in luminosity with a period of approximately 2.1 hours. This has been previously observed, and its origin is unclear: it is unrelated to the orbital period. We find this modulation to vary over the course of our observations in phase and/or period. Our data support the conclusion that this is an accretion-related phenomenon which originates in the accretion disc.
description: Accepted for publication in MNRAS. 15 pages with 3 tables and 10 figures