cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Generalized Kazdan-Warner equations associated with a linear action of a torus on a complex vector space
Creators: name: Miyatake, Natsuo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We introduce generalized Kazdan-Warner equations on Riemannian manifolds associated with a linear action of a torus on a complex vector space. We show the existence and the uniqueness of the solution of the equation on any compact Riemannian manifold. As an application, we give a new proof of a theorem of Baraglia which asserts that a cyclic Higgs bundle gives a solution of the periodic Toda equation.
description: The numbering of theorems, propositions, examples, corollaries, lemmas, definitions, and remarks has been made the same as in the published version. 23 pages
A Note on Infinities in Eternal Inflation
Creators: name: Ellis, George F. R.
name: Stoeger, William R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In some well-known scenarios of open-universe eternal inflation, developed by Vilenkin and co-workers, a large number of universes nucleate and thermalize within the eternally inflating mega-universe. According to the proposal, each universe nucleates at a point, and therefore the boundary of the nucleated universe is a space-like surface nearly coincident with the future light cone emanating from the point of nucleation, all points of which have the same proper-time. This leads the authors to conclude that at the proper-time t = t_{nuc} at which any such nucleation occurs, an infinite open universe comes into existence. We point out that this is due entirely to the supposition of the nucleation occurring at a single point, which in light of quantum cosmology seems difficult to support. Even an infinitesimal space-like length at the moment of nucleation gives a rather different result -- the boundary of the nucleating universe evolves in proper-time and becomes infinite only in an infinite time. The alleged infinity is never attained at any finite time.
description: 13 pages and 6 figures
Additional file 1 of Biological dosiomic features for the prediction of radiation pneumonitis in esophageal cancer patients
Creators: name: Puttanawarut, Chanon
name: Sirirutbunkajorn, Nat
name: Khachonkham, Suphalak
name: Pattaranutaporn, Poompis
name: Wongsawat, Yodchanan
Publisher: name: figshare
Year: 2021
Subjects: subject: Space Science
subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer

description: Additional file 1. Table S1: All features analysed in this study. Table S2: Remaining dosiomic features before input to ML model. Table S3: Radiation pneumonitis grade categorized by RT modality. Table S4: Distribution of the number of beams by RP grade. Figure S1: ROC of DVH, DVHEQD2, DO and DOEQD2. Figure S2: Scatter plot between DVH and DVHEQD2 of V35. Figure S3: Scatter plot between DVH and DVHEQD2 of V40. Figure S4: Scatter plot between DVH and DVHEQD2 of V45. Figure S5: Scatter plot between DO and DOEQD2 of Busyness from NGTDM. Figure S6: Scatter plot between DO and DOEQD2 of 90th percentile. Figure S7: Scatter plot between DO and DOEQD2 of LGLZE from GLSZM. Figure S8: Scatter plot between DO and DOEQD2 of LRHGLE from GLRLM. Figure S9: distribution of number of beams by RP grade in 3D conformal technique.
Real-World Airline Crew Pairing Optimization: Customized Genetic Algorithm versus Column Generation Method
Creators: name: Aggarwal, Divyam
name: Saxena, Dhish Kumar
name: Back, Thomas
name: Emmerich, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Airline crew pairing optimization problem (CPOP) aims to find a set of flight sequences (crew pairings) that cover all flights in an airline's highly constrained flight schedule at minimum cost. Since crew cost is second only to the fuel cost, CPOP solutioning is critically important for an airline. However, CPOP is NP-hard, and tackling it is quite challenging. The literature suggests, that when the CPOP's scale and complexity is reasonably limited, and an enumeration of all crew pairings is possible, then Metaheuristics are used, predominantly Genetic Algorithms (GAs). Else, Column Generation (CG) based Mixed Integer Programming techniques are used. Notably, as per the literature, a maximum of 45,000 crew pairings have been tackled by GAs. In a significant departure, this paper considers over 800 flights of a US-based large airline (with a monthly network of over 33,000 flights), and tests the efficacy of GAs by enumerating all 400,000+ crew pairings, apriori. Towards it, this paper proposes a domain-knowledge-driven customized-GA. The utility of incorporating domain-knowledge in GA operations, particularly initialization and crossover, is highlighted through suitable experiments. Finally, the proposed GA's performance is compared with a CG-based approach (developed in-house by the authors). Though the latter is found to perform better in terms of solution's cost-quality and run time, it is hoped that this paper will help in better understanding the strengths and limitations of domain-knowledge-driven customizations in GAs, for solving combinatorial optimization problems, including CPOPs.
description: 14 pages, 3 figures, 5 tables
title: BAG  en el varón: a propósito de 29 casos
Creators: name: Iturre Salinas, Begoña
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Biopsy
subject: Mammography
subject: Breast

description: Objetivos
Material y método
Resultados
Conclusiones
Bibliografía
description: Objetivos:
Describir la patología del varón biopsiada en nuestra Unidad de Diagnóstico por Imagen de la mama entre el 2010 y 2013 Mostrar sus hallazgos clínico-radiológicos más revelantes y su correlación...
A Cr-K emission line survey in young supernova remnants with Chandra
Creators: name: Yang, X. J.
name: Tsunemi, H.
name: Lu, F. J.
name: Chen, L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We performed a Cr-K emission line survey in young supernova remnants (SNRs) with the Chandra archival data. Our sample includes W49B, Cas A, Tycho and Kepler. We confirmed the existence of the Cr line in W49B and discovered this emission line in the other three SNRs. The line center energies, equivalent widths (EWs) and fluxes of the Cr lines are given. The Cr in Cas A is in a high ionization state while that in Tycho and Kepler is in a much lower one. We find a good positive correlation between Cr and Fe line center energies, suggesting a common origin of Cr and Fe in the nucleosynthesis, which is consistent with the theoretical predictions. We propose that the EW ratio between Cr and Fe can be used as a supplementary constraint on the progenitors' properties and the explosion mechanism.
description: 20 pages, 6 figures, accepted by ApJ
title: Colangiocarcinoma: espectro de hallazgos radiológicos
Creators: name: Gómez de la Heras, Cristina
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Abdomen
subject: Liver
subject: Biliary Tract / Gallbladder
subject: Neoplasia

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Describir los hallazgos radiológicos principales del colangiocarcinoma,
ilustrándolos con casos clínicos. Revisar la clasificación del...
Isomorphism Testing for Graphs Excluding Small Minors
Creators: name: Grohe, Martin
name: Neuen, Daniel
name: Wiebking, Daniel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Discrete Mathematics (cs.DM)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We prove that there is a graph isomorphism test running in time $n^{\operatorname{polylog}(h)}$ on $n$-vertex graphs excluding some $h$-vertex graph as a minor. Previously known bounds were $n^{\operatorname{poly}(h)}$ (Ponomarenko, 1988) and $n^{\operatorname{polylog}(n)}$ (Babai, STOC 2016). For the algorithm we combine recent advances in the group-theoretic graph isomorphism machinery with new graph-theoretic arguments.
description: 33 pages, 7 figures, full version of a paper accepted at FOCS 2020; second version improves the presentation of the results
Additional file 1 of How cancer cells remodel lipid metabolism: strategies targeting transcription factors
Creators: name: Jeong, Do-Won
name: Lee, Seulbee
name: Chun, Yang-Sook
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Developmental Biology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Hematology
subject: Computational Biology

description: Additional file 1.
Applying spatial analysis tools in public health: An example using satscan to detect geographic targets for colorectal cancer screening interventions
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: subject: Cluster Analysis
subject: Colorectal Neoplasms
subject: Computer Graphics
subject: Data Interpretation, Statistical
subject: Demography
subject: FOS: Sociology
subject: Early Detection of Cancer
subject: Florida
subject: Humans
subject: Public Health Practice
subject: Risk Factors
subject: United States

description: Epidemiologists are gradually incorporating spatial analysis into health-related research as geocoded cases of disease become widely available and health-focused geospatial computer applications are developed. One health-focused application of spatial analysis is cluster detection. Using cluster detection to identify geographic areas with high-risk populations and then screening those populations for disease can improve cancer control. SaTScan is a free cluster-detection software application used by epidemiologists around the world to describe spatial clusters of infectious and chronic disease, as well as disease vectors and risk factors. The objectives of this article are to describe how spatial analysis can be used in cancer control to detect geographic areas in need of colorectal cancer screening intervention, identify issues commonly encountered by SaTScan users, detail how to select the appropriate methods for using SaTScan, and explain how method selection can affect results. As an example, we used various methods to detect areas in Florida where the population is at high risk for late-stage diagnosis of colorectal cancer. We found that much of our analysis was underpowered and that no single method detected all clusters of statistical or public health significance. However, all methods detected 1 area as high risk; this area is potentially a priority area for a screening intervention. Cluster detection can be incorporated into routine public health operations, but the challenge is to identify areas in which the burden of disease can be alleviated through public health intervention. Reliance on SaTScan's default settings does not always produce pertinent results.
Topological and non-topological features of generalized Su-Schrieffer-Heeger models
Creators: name: Ahmadi, N.
name: Abouie, J.
name: Baeriswyl, D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The (one-dimensional) Su-Schrieffer-Heeger Hamiltonian, augmented by spin-orbit coupling and longer-range hopping, is studied at half filling for an even number of sites. The ground-state phase diagram depends sensitively on the symmetry of the model. Charge-conjugation (particle-hole) symmetry is conserved if hopping is only allowed between the two sublattices of even and odd sites. In this case (of BDI symmetry) we find a variety of topologically non-trivial phases, characterized by different numbers of edge states (or, equivalently, different quantized Zak phases). The transitions between these phases are clearly signalled by the entanglement entropy. Charge-conjugation symmetry is broken if hopping within the sublattices is admitted (driving the system into the AI symmetry class). We study specifically next-nearest-neighbor hopping with amplitudes $t_a$ and $t_b$ for the $A$ and $B$ sublattices, respectively. For $t_a=t_b$ parity is conserved, and also the quantized Zak phases remain unchanged in the gapped regions of the phase diagram. However, metallic patches appear due to the overlap between conduction and valence bands in some regions of parameter space. The case of alternating next-nearest neighbor hopping, $t_a=-t_b$, is also remarkable, as it breaks both charge-conjugation $C$ and parity $P$ but conserves the product $CP$. Both the Zak phase and the entanglement spectrum still provide relevant information, in particular about the broken parity. Thus the Zak phase for small values of $t_a$ measures the disparity between bond strengths on $A$ and $B$ sublattices, in close analogy to the proportionality between the Zak phase and the polarization in the case of the related Aubry-André model.
description: 12 pages, 13 figures, accepted for publication in PRB
Minimum Cuts in Geometric Intersection Graphs
Creators: name: Cabello, Sergio
name: Mulzer, Wolfgang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences

description: Let $\mathcal{D}$ be a set of $n$ disks in the plane. The disk graph $G_\mathcal{D}$ for $\mathcal{D}$ is the undirected graph with vertex set $\mathcal{D}$ in which two disks are joined by an edge if and only if they intersect. The directed transmission graph $G^{\rightarrow}_\mathcal{D}$ for $\mathcal{D}$ is the directed graph with vertex set $\mathcal{D}$ in which there is an edge from a disk $D_1 \in \mathcal{D}$ to a disk $D_2 \in \mathcal{D}$ if and only if $D_1$ contains the center of $D_2$. Given $\mathcal{D}$ and two non-intersecting disks $s, t \in \mathcal{D}$, we show that a minimum $s$-$t$ vertex cut in $G_\mathcal{D}$ or in $G^{\rightarrow}_\mathcal{D}$ can be found in $O(n^{3/2}\text{polylog} n)$ expected time. To obtain our result, we combine an algorithm for the maximum flow problem in general graphs with dynamic geometric data structures to manipulate the disks. As an application, we consider the barrier resilience problem in a rectangular domain. In this problem, we have a vertical strip $S$ bounded by two vertical lines, $L_\ell$ and $L_r$, and a collection $\mathcal{D}$ of disks. Let $a$ be a point in $S$ above all disks of $\mathcal{D}$, and let $b$ a point in $S$ below all disks of $\mathcal{D}$. The task is to find a curve from $a$ to $b$ that lies in $S$ and that intersects as few disks of $\mathcal{D}$ as possible. Using our improved algorithm for minimum cuts in disk graphs, we can solve the barrier resilience problem in $O(n^{3/2}\text{polylog} n)$ expected time.
description: 11 pages, 4 figures; this version corrects a small bug in the proof of Lemma 5. We thank Matej Marinko for pointing this out
title: Lesiones de partes de blandas de los dedos de los pies y manos : Dilema diagnóstico
Creators: name: Lopez Parra, Maria Dolores
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Education
subject: Ultrasound
subject: MR
subject: Musculoskeletal soft tissue
subject: Extremities

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
1.- Describir las diferentes tumoraciones de partes blandas que nos podemos encontrar en las manos y los pies. 2.- Hacer hincapié en el manejo radiológico . 3.- Describir aquellas tumoraciones que en base a su composición titular y localización...
Cluster Monte Carlo and numerical mean field analysis for the water liquid--liquid phase transition
Creators: name: Mazza, Marco G.
name: Stokely, Kevin
name: Strekalova, Elena
name: Stanley, H. Eugene
name: Franzese, Giancarlo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: By the Wolff's cluster Monte Carlo simulations and numerical minimization within a mean field approach, we study the low temperature phase diagram of water, adopting a cell model that reproduces the known properties of water in its fluid phases. Both methods allows us to study the water thermodynamic behavior at temperatures where other numerical approaches --both Monte Carlo and molecular dynamics-- are seriously hampered by the large increase of the correlation times. The cluster algorithm also allows us to emphasize that the liquid--liquid phase transition corresponds to the percolation transition of tetrahedrally ordered water molecules.
description: 6 pages, 3 figures
Escape kinetics of self-propelled particles from a circular cavity
Creators: name: Debnath, Tanwi
name: Chaudhury, Pinaki
name: Mukherjee, Taritra
name: Mondal, Debasish
name: Ghosh, Pulak K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences
subject: Article

description: We numerically investigate the mean exit time of an inertial active Brownian particle from a circular cavity with single or multiple exit windows. Our simulation results witness distinct escape mechanisms depending upon the relative amplitudes of the thermal length and self-propulsion length compared to the cavity and pore sizes. For exceedingly large self-propulsion lengths, overdamped active particles diffuse on the cavity surface, and rotational dynamics solely governs the exit process. On the other hand, the escape kinetics of a very weakly damped active particle is largely dictated by bouncing effects on the cavity walls irrespective of the amplitude of self-propulsion persistence lengths. We show that the exit rate can be maximized for an optimal self-propulsion persistence length, which depends on the damping strength, self-propulsion velocity, and cavity size. However, the optimal persistence length is insensitive to the opening windows' size, number, and arrangement. Numerical results have been interpreted analytically based on qualitative arguments. The present analysis aims to understand the transport controlling mechanism of active matter in confined structures.
description: 13 pages
List homomorphism problems for signed trees
Creators: name: Bok, Jan
name: Brewster, Richard
name: Feder, Tomás
name: Hell, Pavol
name: Jedličková, Nikola
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: Computational Complexity (cs.CC)
subject: Discrete Mathematics (cs.DM)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: G.2.2
subject: 05C60, 05C22, 05C85

description: We consider homomorphisms of signed graphs from a computational perspective. In particular, we study the list homomorphism problem seeking a homomorphism of an input signed graph $(G,σ)$, equipped with lists $L(v) \subseteq V(H), v \in V(G)$, of allowed images, to a fixed target signed graph $(H,π)$. The complexity of the similar homomorphism problem without lists (corresponding to all lists being $L(v)=V(H)$) has been previously classified by Brewster and Siggers, but the list version remains open and appears difficult. We illustrate this difficulty by classifying the complexity of the problem when $H$ is a tree (with possible loops). The tools we develop will be useful for classifications of other classes of signed graphs, and in a future companion paper we will illustrate this by using them to classify the complexity for certain irreflexive signed graphs. The structure of the signed trees in the polynomial cases is interesting, suggesting that the class of general signed graphs for which the problems are polynomial may have nice structure, analogous to the so-called bi-arc graphs (which characterized the polynomial cases of list homomorphisms to unsigned graphs).
description: final version as appeared in DM, the former paper is split into this and "List homomorphisms to separable signed graphs" (to appear on arXiv during this week)
Additional file 1 of Healthcare resource utilization and costs associated with anogenital warts in Morocco
Creators: name: Berrada, Myriam
name: Holl, Ryan
name: Ndao, Tidiane
name: Benčina, Goran
name: Dikhaye, Siham
name: Melhouf, Abdelilah
name: Chiheb, Soumiya
name: Guelzim, Khalid
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy
subject: 60506 Virology
subject: FOS: Biological sciences
subject: Computational Biology

description: Additional file 1. Table S1. Base costs for diagnosis, first-line treatment, follow-up, and recurrenceA.
Fonti cartografiche di Toscana e Catalogna di Età Moderna e Contemporanea. Ricostruire con il GIS, comunicare con WebGIS
Creators: name: Grava, Massimiliano <1970>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: M-STO/04 Storia contemporanea

description: The aim of this study is the creation of a Historical GIS that spatially reference data retrieved from Italian and Catalan historical sources and records. The generation of locates these metasource was achieved through the integral acquisition of source-oriented records and the insertion of mark-up fields, yet maintaining, where possible, the original encoding of the source documents.
In order to standardize the set of information contained in the original documents and thus allow queries to the database, additional fields were introduced.
Once the initial phase of data research and analysis was concluded the new virtual source was published online within an open WebGIS source. As a conclusion we have created a dynamic and spatially referenced database of geo-historical information. The configuration of this new source is such to guarantee the best possible accessibility.
description: El propósito de esta investigación es la creación de un Historical GIS en que referir espacialmente los datos de fuentes históricas y de archivo italianas y catalanas. La construcción de estas metafuentes ha sido realizada mediante la adquisición de la totalidad de los datos de archivo (source oriented) manteniendo intacta la codificación original del documento con la inserción de campos para el marcado (mark-up). La necesidad de estandarizar la información contenida en los documentos para hacer quary en la base de datos geográfica se ha garantizado mediante la introducción de nuevos campos específicos en los que se han incluido información adicional no presente en el documento original. Una vez que la etapa de la investigación y el estudio comparativo de la nueva fuente de datos ha sido acabada la metafuente ha sido publicada en la web a través de un WebGIS open source. Una información geohistórica, espacialmente relacionada, y dinámicas que ha sido diseñada para ser mostrada y entendidad lo mejor posible.
Physical Conditions in Shocked Interstellar Gas Interacting with the Supernova Remnant IC 443
Creators: name: Ritchey, Adam M.
name: Jenkins, Edward B.
name: Federman, Steven R.
name: Rice, Johnathan S.
name: Caprioli, Damiano
name: Wallerstein, George
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the results of a detailed investigation into the physical conditions in interstellar material interacting with the supernova remnant IC 443. Our analysis is based on a comprehensive examination of high-resolution far-ultraviolet spectra obtained with the Space Telescope Imaging Spectrograph onboard the Hubble Space Telescope of two stars behind IC 443. One of our targets (HD 43582) probes gas along the entire line of sight through the supernova remnant, while the other (HD 254755) samples material located ahead of the primary supernova shock front. We identify low velocity quiescent gas in both directions and find that the densities and temperatures in these components are typical of diffuse atomic and molecular clouds. Numerous high velocity components are observed in the absorption profiles of neutral and singly-ionized atomic species toward HD 43582. These components exhibit a combination of greatly enhanced thermal pressures and significantly reduced dust-grain depletions. We interpret this material as cooling gas in a recombination zone far downstream from shocks driven into neutral gas clumps. The pressures derived for a group of ionized gas components at high positive velocity toward HD 43582 are lower than those of the other shocked components, pointing to pressure inhomogeneities across the remnant. A strong very high velocity component near -620 km/s is seen in the absorption profiles of highly-ionized species toward HD 43582. The velocity of this material is consistent with the range of shock velocities implied by observations of soft thermal X-ray emission from IC 443. Moderately high-velocity gas toward HD 254755 may represent shocked material from a separate foreground supernova remnant.
description: 88 pages, 27 figures, accepted for publication in ApJ
The rotation curves shapes of late-type dwarf galaxies
Creators: name: Swaters, R. A.
name: Sancisi, R.
name: van Albada, T. S.
name: van der Hulst, J. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present rotation curves derived for a sample of 62 late-type dwarf galaxies that have been observed as part of the Westerbork HI Survey of Spiral and Irregular Galaxies (WHISP) project. The rotation curves were derived by interactively fitting model data cubes to the observed cubes, taking rotation curve shape, HI distribution, inclination, and the size of the beam into account. This makes it possible to correct for the effects of beam smearing. The dwarf galaxies in our sample have rotation-curve shapes that are similar to those of late-type spiral galaxies, in the sense that their rotation curves, when expressed in units of disk scale lengths, rise as steeply in the inner parts and start to flatten at two disk scale lengths. None of the galaxies in our sample have solid-body rotation curves that extend beyond three scale lengths. The logarithmic outer rotation curve slopes are similar between late-type dwarf and spiral galaxies. Thus, whether the flat part of the rotation curve is reached seems to depend more on the extent of the rotation curve than on its amplitude. We also find that the outer rotation curve shape does not strongly depend on luminosity, at least for galaxies fainter than M_R~-19. We find that in spiral galaxies and in the central regions of late-type dwarf galaxies, the shape of the central distribution of light and the inner rise of the rotation curve are related. This implies that galaxies with stronger central concentrations of light also have higher central mass densities, and it suggests that the luminous mass dominates the gravitational potential in the central regions, even in low surface brightness dwarf galaxies.
description: 22 pages, 2009 A&A 493, 871
Ancestral mutations as a tool for solubilizing proteins: The case of a hydrophobic phosphate-binding protein
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: Ancestral librairies
Protein engineering
Protein solubilization
Hydrophobic proteins
Phosphate-binding proteins
DING proteins

description: Stable and soluble proteins are ideal candidates for functional and structural studies. Unfortunately, some proteins or enzymes can be difficult to isolate, being sometimes poorly expressed in heterologous systems, insoluble and/or unstable. Numerous methods have been developed to address these issues, from the screening of various expression systems to the modification of the target protein itself. Here we use a hydrophobic, aggregation-prone, phosphate-binding protein (HPBP) as a case study. We describe a simple and fast method that selectively uses ancestral mutations to generate a soluble, stable and functional variant of the target protein, here named sHPBP. This variant is highly expressed in Escherichia coli, is easily purified and its structure was solved at much higher resolution than its wild-type progenitor (1.3 versus 1.9Å, respectively). © 2014 The Authors.
A comparison of a ferromagnetic core coil and an air core coil as the sensor head of the induction magnetometer
Creators: name: Ueda, Hajime
Publisher: name: University of British Columbia
Year: 2010

description: An experimental approach is made to elucidate the input-output characteristics of a ferromagnetic core coil used as a sensor head of an induction magnetometer. Analyses made here are mainly concerned with comparison of magnetograms obtained by the permalloy core coil with respect to the one acquired simultaneously by a large open loop coil, or air core coil. Ratios of the corresponding peak-to-peak values are taken to examine distortions of the output amplitude. Blackman-Tukey's method of power spectrum estimation is applied to a portion of magnetograms, and spectral peaks are compared. The results of these analyses show that no significant distortions or harmonics are recognized in data obtained by the permalloy core coil. This suggests that the response of the permalloy core coil sensor is linear providing that the air core coil sensor is linear in response. The demagnetization effect may be an explanation for the linear response of the permalloy core coil sensors. The demagnetization factor of the core material depends only on the geometry of the core. The permeability of the core material is suppressed in its effect if it has so large a value that its reciprocal value is much smaller than the demagnetization factor: under such circumstances, the sensitivity of the coil does not depend on the permeability of core but on the demagnetization factor. The demagnetization effect also suggests that the longer the core, the higher the coil sensitivity will be.
Detecting paroxysmal coughing from pertussis cases using voice recognition technology
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2013
Subjects: Acoustics
Algorithms
Artificial Intelligence
Child
Cough
Diagnosis, Computer-Assisted
Diagnosis, Differential
Humans
Neural Networks, Computer
Speech Recognition Software
Whooping Cough

description: Background: Pertussis is highly contagious; thus, prompt identification of cases is essential to control outbreaks. Clinicians experienced with the disease can easily identify classic cases, where patients have bursts of rapid coughing followed by gasps, and a characteristic whooping sound. However, many clinicians have never seen a case, and thus may miss initial cases during an outbreak. The purpose of this project was to use voice-recognition software to distinguish pertussis coughs from croup and other coughs. Methods: We collected a series of recordings representing pertussis, croup and miscellaneous coughing by children. We manually categorized coughs as either pertussis or non-pertussis, and extracted features for each category. We used Melfrequency cepstral coefficients (MFCC), a sampling rate of 16 KHz, a frame Duration of 25 msec, and a frame rate of 10 msec. The coughs were filtered. Each cough was divided into 3 sections of proportion 3-4-3. The average of the 13 MFCCs for each section was computed and made into a 39-element feature vector used for the classification. We used the following machine learning algorithms: Neural Networks, K-Nearest Neighbor (KNN), and a 200 tree Random Forest (RF). Data were reserved for cross-validation of the KNN and RF. The Neural Network was trained 100 times, and the averaged results are presented. Results: After categorization, we had 16 examples of non-pertussis coughs and 31 examples of pertussis coughs. Over 90% of all pertussis coughs were properly classified as pertussis. The error rates were: Type I errors of 7%, 12%, and 25% and Type II errors of 8%, 0%, and 0%, using the Neural Network, Random Forest, and KNN, respectively. Conclusion: Our results suggest that we can build a robust classifier to assist clinicians and the public to help identify pertussis cases in children presenting with typical symptoms. © 2013 Parker et al.
Potential algebra approach to position dependent mass Schroedinger equation
Creators: name: Jana, T. K.
name: Roy, P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is shown that for a class of position dependent mass Schroedinger equation the shape invariance condition is equivalent to a potential symmetry algebra. Explicit realization of such algebras have been obtained for some shape invariant potentials.
High-velocity interstellar absorption associated with the supernova remnant W28
Creators: name: Ritchey, Adam M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present an analysis of moderately high resolution optical spectra obtained for the sight line to CD-23 13777, an O9 supergiant that probes high velocity interstellar gas associated with the supernova remnant W28. Absorption components at both high positive and high negative velocity are seen in the interstellar Na I D and Ca II H and K lines toward CD-23 13777. The high velocity components exhibit low Na I/Ca II ratios, suggesting efficient grain destruction by shock sputtering. High column densities of CH+, and high CH+/CH ratios, for the components seen at lower velocity may be indicative of enhanced turbulence in the clouds interacting with W28. The highest positive and negative velocities of the components seen in Na I and Ca II absorption toward CD-23 13777 imply that the velocity of the blast wave associated with W28 is at least 150 km/s, a value that is significantly higher than most previous estimates. The line of sight to CD-23 13777 passes very close to a well-known site of interaction between the SNR and a molecular cloud to the northeast. The northeast molecular cloud exhibits broad molecular line emission, OH maser emission from numerous locations, and bright extended GeV and TeV gamma-ray emission. The sight line to CD-23 13777 is thus a unique and valuable probe of the interaction between W28 and dense molecular gas in its environs. Future observations at UV and visible wavelengths will help to better constrain the abundances, kinematics, and physical conditions in the shocked and quiescent gas along this line of sight.
description: 14 pages, 7 figures, accepted for publication in MNRAS
Additional file 2 of Investigation of carbon and energy metabolic mechanism of mixotrophy in Chromochloris zofingiensis
Creators: name: Zhang, Zhao
name: Sun, Dongzhe
name: Cheng, Ka-Wing
name: Chen, Feng
Publisher: name: figshare
Year: 2021
Subjects: subject: Plant Biology
subject: FOS: Biological sciences

description: Additional file 2: Figure S1. Sample correlation of transcriptomes among the three trophic modes.
Uncovering the mesoscale structure of the credit default swap market to improve portfolio risk modelling
Creators: name: Anagnostou, Ioannis
name: Squartini, Tiziano
name: Kandhai, Drona
name: Garlaschelli, Diego
Publisher: name: arXiv
Year: 2020
Subjects: subject: Risk Management (q-fin.RM)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Economics and business

description: One of the most challenging aspects in the analysis and modelling of financial markets, including Credit Default Swap (CDS) markets, is the presence of an emergent, intermediate level of structure standing in between the microscopic dynamics of individual financial entities and the macroscopic dynamics of the market as a whole. This elusive, mesoscopic level of organisation is often sought for via factor models that ultimately decompose the market according to geographic regions and economic industries. However, at a more general level the presence of mesoscopic structure might be revealed in an entirely data-driven approach, looking for a modular and possibly hierarchical organisation of the empirical correlation matrix between financial time series. The crucial ingredient in such an approach is the definition of an appropriate null model for the correlation matrix. Recent research showed that community detection techniques developed for networks become intrinsically biased when applied to correlation matrices. For this reason, a method based on Random Matrix Theory has been developed, which identifies the optimal hierarchical decomposition of the system into internally correlated and mutually anti-correlated communities. Building upon this technique, here we resolve the mesoscopic structure of the CDS market and identify groups of issuers that cannot be traced back to standard industry/region taxonomies, thereby being inaccessible to standard factor models. We use this decomposition to introduce a novel default risk model that is shown to outperform more traditional alternatives.
description: Quantitative Finance (2021)
Subdegree Sunyaev-Zel'dovich Signal from Multifrequency BOOMERanG observations
Creators: name: Veneziani, M.
name: Amblard, A.
name: Cooray, A.
name: Piacentini, F.
name: Pietrobon, D.
name: Serra, P.
name: Ade, P. A. R.
name: Bock, J. J.
name: Bond, J. R.
name: Borrill, J.
name: Boscaleri, A.
name: Cabella, P.
name: Contaldi, C. R.
name: Crill, B. P.
name: de Bernardis, P.
name: De Gasperis, G.
name: de Oliveira-Costa, A.
name: De Troia, G.
name: Di Stefano, G.
name: Ganga, K. M.
name: Hivon, E.
name: Jones, W. C.
name: Kisner, T. S.
name: Lange, A. E.
name: MacTavish, C. J.
name: Masi, S.
name: Mauskopf, P. D.
name: Melchiorri, A.
name: Montroy, T. E.
name: Natoli, P.
name: Netterfield, C. B.
name: Pascale, E.
name: Polenta, G.
name: Ricciardi, S.
name: Romeo, G.
name: Ruhl, J. E.
name: Santini, P.
name: Tegmark, M.
name: Vittorio, N.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Sunyaev-Zel'dovich (SZ) effect is the inverse Compton-scattering of cosmic microwave background (CMB) photons by hot electrons in the intervening gas throughout the universe. The effect has a distinct spectral signature that allows its separation from other signals in multifrequency CMB datasets. Using CMB anisotropies measured at three frequencies by the BOOMERanG 2003 flight we constrain SZ fluctuations in the 10 arcmin to 1 deg angular range. Propagating errors and potential systematic effects through simulations, we obtain an overall upper limit of 15.3 uK (2 sigma) for rms SZ fluctuations in a broad bin between multipoles of of 250 and 1200 at the Rayleigh-Jeans (RJ) end of the spectrum. When combined with other CMB anisotropy and SZ measurements, we find that the local universe normalization of the density perturbations is sigma-8(SZ) < 0.96 at the 95% confidence level, consistent with sigma-8 determined from primordial perturbations.
description: accepted for publication in ApJ. Letters
Association between sense of coherence and health-related quality of life among primary care patients with chronic musculoskeletal pain
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2013
Subjects: Adaptation, Psychological
Adult
Aged
Chronic Pain
Female
Health Status
Humans
Linear Models
Male
Middle Aged
Musculoskeletal Pain
Primary Health Care
Quality of Life
Sense of Coherence
Surveys and Questionnaires
United States
United States Department of Veterans Affairs

description: Background: Sense of Coherence (SOC) is a measure of an individual's capacity to use various coping mechanisms and resources when faced with a stressor. Chronic pain is one of the most prevalent and disabling conditions in clinical practice. This study examines the extent to which a strong SOC is associated with less pain and better health related quality of life (HRQoL) among patients with chronic pain.Methods: We analyzed data from the Stepped Care to Optimize Pain care Effectiveness (SCOPE) trial which enrolled 250 patients with persistent (3 months or longer) musculoskeletal pain who were receiving care in an United States Department of Veterans Affairs (VA) primary care clinic. The abbreviated three-item SOC scale was used to measure personal coping capability. Participants were categorized into Strong SOC (score 0-1) and Weak SOC (score 2-6). The Brief Pain Inventory (BPI) was used to assess the severity and disability associated with pain. Additionally, pain self-efficacy (ASES) and catastrophizing (CSQ) were assessed. HRQoL was assessed with the 36-item Short-Form Health Survey (SF-36) social functioning, vitality, and general health subscales. Multiple linear regression models were performed to examine whether SOC was independently associated with pain-specific and HRQoL outcomes, after adjusting for sociodemographic and socioeconomic characteristics, medical comorbidities and major depression.Results: Of the 250 study patients, 61% had a strong SOC whereas 39% had a weak SOC. Multivariable linear regression analysis showed that a strong SOC was significantly associated with better general health, vitality, social functioning and pain self-efficacy as well as less pain catastrophizing. These significant findings were partially attenuated, but remained statistically significant, after controlling for major depression. SOC was not significantly associated with pain severity or pain disability.Conclusions: A strong SOC is associated with better HRQoL and self-efficacy as well as less catastrophizing in patients with chronic pain. SOC may be an important coping mechanism (strategy) for patients with chronic musculoskeletal pain.Trial registration: Clinicaltrials.gov Identifier: NCT00926588. © 2013 Chumbler et al.; licensee BioMed Central Ltd.
Additional file 1 of Using patient feedback to adapt intervention materials based on acceptance and commitment therapy for people receiving renal dialysis
Creators: name: Elander, James
name: Kapadi, Romaana
name: Coyne, Emma
name: Taal, Maarten W.
name: Selby, Nicholas M.
name: Stalker, Carol
name: Mitchell, Kathryn
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Marine Biology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1. Booklet of draft materials.
Traffic Simulator for Multibeam Satellite Communication Systems
Creators: name: Al-Hraishawi, Hayder
name: Lagunas, Eva
name: Chatzinotas, Symeon
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Assume that a multibeam satellite communication system is designed from scratch to serve a particular area with maximal resource utilization and to satisfactorily accommodate the expected traffic demand. The main design challenge here is setting optimal system parameters such as number of serving beams, beam directions and sizes, and transmit power. This paper aims at developing a tool, multibeam satellite traffic simulator, that helps addressing these fundamental challenges, and more importantly, provides an understanding to the spatial-temporal traffic pattern of satellite networks in large-scale environments. Specifically, traffic demand distribution is investigated by processing credible datasets included three major input categories of information: (i) population distribution for broadband Fixed Satellite Services (FSS), (ii) aeronautical satellite communications, and (iii) vessel distribution for maritime services. This traffic simulator combines this three-dimensional information in addition to time, locations of terminals, and traffic demand. Moreover, realistic satellite beam patterns have been considered in this work, and thus, an algorithm has been proposed to delimit the coverage boundaries of each satellite beam, and then compute the heterogeneous traffic demand at the footprint of each beam. Furthermore, another algorithm has been developed to capture the inherent attributes of satellite channels and the effects of multibeam interference. Data-driven modeling for satellite traffic is crucial nowadays to design innovative communication systems, e.g., precoding and beam hopping, and to devise efficient resource management algorithms.
Anti-PT-symmetry-enhanced interconversion between microwave and optical fields
Creators: name: Mukhopadhyay, Debsuvra
name: Nair, Jayakrishnan M. P.
name: Agarwal, Girish S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The intrinsic dissipation of systems into a shared reservoir introduces coherence between two systems, enabling anti-Parity-Time (anti-PT) symmetry. In this paper, we propose an anti-PT symmetric converter, consisting of a microwave cavity coupled dissipatively to a ferromagnetic sphere, which supports significant improvements in the conversion efficiency when compared to coherently coupled setups. In particular, when only the ferrite sample is driven, the strong coherence induced by the vacuum of the mediating channel leads to much stronger enhancements in the intended conversion. The enhancement is an inalienable artifact of the emergence of a long-lived, dark mode associated with a quasi-real singularity of the hybrid system. In addition, we observe considerable asymmetry in the efficiencies of microwave-to-optical and optical-to-microwave conversions, in spite of the symmetrical structure of the trilinear optomagnonic coupling stimulating both the transduction phenomena. The nonreciprocity stems from the intrinsic asymmetry in the couplings of the microwave and optical fields to the cavity-magnon network as well as the phase coupling entailed by the spatial separation.