cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Linear Boltzmann-like equation, describing non-classical particle transport, and related asymptotic solutions for small mean free paths
Creators: name: Rukolaine, Sergey A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Nuclear Theory (nucl-th)
subject: Biological Physics (physics.bio-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: In classical kinetic or kinetic-like models a particle free path distribution is exponensial, but this is more likely to be an exception than a rule. In this paper we derive a linear Boltzmann-like equation for a general free path distribution in the framework of Alt's model J. Math. Biol. 9:147 (1980). In the special case that the free path distribution has at least first and second finite moments we construct an asymptotic solution of the equation for small mean free paths. The asymptotic solution becomes a diffusion approximation to the one-speed Boltzmann-like equation.
description: 14 pages
Tunneling transport in a few monolayer-thick WS2/graphene heterojunction
Creators: name: Yamaguchi, Takehiro
name: Moriya, Rai
name: Inoue, Yoshihisa
name: Morikawa, Sei
name: Masubuchi, Satoru
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Machida, Tomoki
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: This paper demonstrates the high-quality tunnel barrier characteristics and layer number controlled tunnel resistance of a transition metal dichalcogenide (TMD) measuring just a few monolayers in thickness. Investigation of vertical transport in WS2 and MoS2 TMDs in graphene/TMD/metal heterostructures revealed that WS2 exhibits tunnel barrier characteristics when its thickness is between 2 to 5 monolayers, whereas MoS2 experiences a transition from tunneling to thermionic emission transport with increasing thickness within the same range. Tunnel resistance in a graphene/WS2/metal heterostructure therefore increases exponentially with the number of WS2 layers, revealing the tunnel barrier height of WS2 to be 0.37 eV.
description: 15 pages, 3 figures
Information Interaction Criteria Among Students in Process of Task-Based Information Searching (Role of Objective Complexity and Type of Product)
Publisher: name: Iranian Research Institute for Information Science and Technology (IranDoc)
Year: 2016

description: Purpose:  human-information interactions must be considered in order to be able to interactively design Information Retrieval Systems (IRS). In this regard, study of users’ interactions must be based on their socio-cultural context (specifically work tasks). Accordingly, this paper aims to explore the use of information-interaction criteria among students in the information searching process according to different kinds of their work tasks.\n\n Methodology: This research is applied qualitative method using exploratory study. The research population consisted of MSc students of Ferdowsi university of Mashhad enrolled in 2012-13  academic year. In 3 stages of sampling (random stratified, quota, and voluntary sampling), 30 cases were selected. Each of these cases searched 6 different types of simulated work tasks. Interaction criteria were extracted ? Content analysis of aloud thinking reports. Validity of tools was verified through Faculties of KIS at Ferdowsi university of Mashhad. Also,0.78  Kripendorff’s alpha ratio based on an agreement between the inter – coder indicates the Dependability  of content analysis.\n\nFindings: The findings show that in addition to ‘topic’ criteria, other interaction criteria impact on information- interaction of users, such as: ‘search results ranking’, ‘domain knowledge of user’, ‘layout’, ‘type of information resource’ and etc. based on the level of objective complexity and product of  work tasks, information-interaction criteria change.\n\nConclusion: the users pay attention to different information-interaction criteria in process of information searching, considering to variety of work tasks (level of objective complexity and product). So, it is necessary to pay attention to work task characteristics in order to design interactive and personalized IR systems.
De-Pinning Transition of Bubble Phases in a High Landau Level
Creators: name: Wang, Xuebin
name: Fu, Hailong
name: Du, Lingjie
name: Liu, Xiaoxue
name: Wang, Pengjie
name: Pfeiffer, L. N.
name: West, K. W.
name: Du, Rui -Rui
name: Lin, Xi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: While in the lowest Landau level the electron-electron interaction leads to the formation of the Wigner crystal, in higher Landau levels a solid phase with multiple electrons in a lattice site of crystal was predicted, which was called the bubble phase. Reentrant integer quantum Hall states are believed to be the insulating bubble phase pinned by disorder. We carry out nonlinear transport measurements on the reentrant states and study the de-pinning of the bubble phase, which is complementary to previous microwave measurements and provides unique information. In this study, conductivity is directly measured with Corbino geometry. Based on the threshold electric field of de-pinning, a phase diagram of the reentrant state is mapped. We discuss an interaction-driven topological phase transition between the integer quantum Hall state and the reentrant integer quantum Hall state.
description: 11 pages, 3 figures
Linking compact dwarf starburst galaxies in the RESOLVE survey to downsized blue nuggets
Creators: name: Frazer, E.M.
name: Cleaves, N.T.
name: Mendes De Oliveira, C.
name: Quint, B.C.
name: Amram, P.
name: Bittner, A.S.
name: Moffett, A.J.
name: Eckert, K.D.
name: Carr, D.S.
name: Palumbo, M.L.
name: Stark, D.V.
name: Kannappan, S.J.
name: Norris, M.A.
name: Norman, D.J.
name: Fraga, L.
Publisher: name: Oxford University Press
Year: 2020

description: We identify and characterize compact dwarf starburst (CDS) galaxies in the REsolved Spectroscopy Of a Local VolumE (RESOLVE) survey, a volume-limited census of galaxies in the local Universe, to probe whether this population contains any residual 'blue nuggets,' a class of intensely star-forming compact galaxies first identified at high redshift z. Our 50 low-z CDS galaxies are defined by dwarf masses (stellar mass M* < 109.5 M⊙), compact bulged-disc or spheroid-dominated morphologies (using a quantitative criterion, μΔ > 8.6), and specific star formation rates (SSFRs) above the defining threshold for high-z blue nuggets (log SSFR [Gyr-1] >-0.5). Across redshifts, blue nuggets exhibit three defining properties: Compactness relative to contemporaneous galaxies, abundant cold gas, and formation via compaction in mergers or colliding streams. Those with halo mass below Mhalo ∼1011.5 M⊙ may in theory evade permanent quenching and cyclically refuel until the present day. Selected only for compactness and starburst activity, our CDS galaxies generally have Mhalo ≲ 1011.5 M⊙ and gas-to-stellar mass ratio ≳1. Moreover, analysis of archival DECaLS photometry and new 3D spectroscopic observations for CDS galaxies reveals a high rate of photometric and kinematic disturbances suggestive of dwarf mergers. The SSFRs, surface mass densities, and number counts of CDS galaxies are compatible with theoretical and observational expectations for redshift evolution in blue nuggets. We argue that CDS galaxies represent a maximally starbursting subset of traditional compact dwarf classes such as blue compact dwarfs and blue E/S0s. We conclude that CDS galaxies represent a low-z tail of the blue nugget phenomenon formed via a moderated compaction channel that leaves open the possibility of disc regrowth and evolution into normal disc galaxies.
Studies of emotional aspects of information search and retrieval on the Web: textresearch and scientific mapping
Publisher: name: Iranian Research Institute for Information Science and Technology (IranDoc)
Year: 2016

description: The present study was conducted to analyze the process of researches on the subject of emotional aspects in the field of information retrieval and mapping this field topic.From the methodological perspective, the present study is Descriptive survey and the type of study was practical.For this purpose, 371 related articles were extracted from Web of Science and the scientific map fields subject of these articles was traced by using ucinet software and combination of package it "netdraw". In this section, by using of matrix cotopics in the field subject cateorgy articles was extracted and applied.The analysis of findings showed that the most prolific author in this field was BELKIN, NJ in the field of library and information studies from America's with 19 scientific production.The most production resources were published in the JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE and then,INFORMATION PROCESSING & MANAGEMENT. The most products has been published in paper format (64.7 percent), with two authors, in English language in 2011,2009 and 2014. Most scientific production has been Performed by using experimental methods(97/26percent) with observation tools (63.46 percent).Review of studies on the emotional aspects of information retrieval based on the aims of the study into two groups, "based on user studies" and "content-based studies" showed that, User-based studies(54.49 percent) had the highest frequency of studies. adult age groups in most of these research have been studied.Children and patients also investigated in these research.In Content-based research, results showed that information systems analysis were the most content analyzed in the research. Emotional aspects of information retrieval in 60 Subject area has been published in the Web of Science.The most Articles in this field has been published in computer science, information systems, information and library science, and artificial intelligence.
Information Seeking Behavior & Information Resources Management:Mental Process Selecting Subjects & Identifying Information Needs ) Case study: Graduate Students in Women seminaries of Shiraz of Academic year 1393- 1394(
Publisher: name: Iranian Research Institute for Information Science and Technology (IranDoc)
Year: 2016

description: The aim of this research is Information Resources Management: Mental Process Selecting Subjects &  Identifying Information Needs. The research method used in this study is a Quantitative method. Sampling is purposeful. This means that it includes graduate Students in Women seminaries of Shiraz who have information-seeking experience and are able to express their views and information needs. The sample was selected according to the random sampling method with Cochran formula from 710 students. According to this sampling method there is 241 Graduate Students included in 1392-1393 seminaries year of  Women seminaries of Shiraz. This is a survey research Which has been carried out by employing a questionnaire and SPSS for windows to analyze data. The results showed that students for selecting subjects,  identifying information needs used methods and media such as Prying Mind, reviewing of information resources, Consulting with subject specialists.
Looking at the Distant Universe with the MeerKAT Array: Discovery of a Luminous OH Megamaser at z > 0.5
Creators: name: Hess, K.M.
name: Somerville, R.S.
name: Oosterloo, T.
name: Skelton, R.
name: Glowacki, M.
name: Wu, J.F.
name: Srianand, R.
name: Verheijen, M.
name: Roberts, H.
name: Vaccari, M.
name: Bowler, R.
name: Crawford, S.M.
name: Korsaga, M.
name: Baker, A.J.
name: Randriamiarinarivo, N.
name: Pisano, D.J.
name: Duncan, K.
name: Jarvis, M.
name: Hughes, J.P.
name: Adams, N.
name: Frank, B.
name: February, S.
name: Blyth, S.-L.
name: Cress, C.
name: Ravindranath, S.
name: Makhathini, S.
name: Meyer, M.
name: Lochner, M.
name: Staveley-Smith, L.
name: Hatfield, P.
name: Smirnov, O.
name: Davé, R.
name: Kazemi-Moridani, A.
name: Kannappan, S.
name: Walter, F.
name: Heywood, I.
name: Zwaan, M.A.
name: De Blok, E.
name: Oh, S.-H.
name: Kereš, D.
name: Kraan-Korteweg, R.C.
name: Oppor, J.
name: Bershady, M.
name: Chemin, L.
name: Smith, M.
name: Holwerda, B.W.
name: Tanaka, M.
name: Lah, P.
name: Klöckner, H.-R.
name: Van Driel, W.
name: Healy, J.
name: Elson, E.
name: Blecher, T.
name: Catinella, B.
name: Schröder, A.C.
name: Hoosain, M.
name: Pan, H.
name: Katz, N.
name: Delhaize, J.
name: Darling, J.
name: Hutchens, Z.L.
name: Gawiser, E.
name: Henning, P.
name: Meurer, G.R.
name: Obreschkow, D.
name: Deane, R.
name: Maddox, N.
name: Collier, J.D.
Publisher: name: American Astronomical Society
Year: 2022

description: In the local universe, OH megamasers (OHMs) are detected almost exclusively in infrared-luminous galaxies, with a prevalence that increases with IR luminosity, suggesting that they trace gas-rich galaxy mergers. Given the proximity of the rest frequencies of OH and the hyperfine transition of neutral atomic hydrogen (H i), radio surveys to probe the cosmic evolution of H i in galaxies also offer exciting prospects for exploiting OHMs to probe the cosmic history of gas-rich mergers. Using observations for the Looking At the Distant Universe with the MeerKAT Array (LADUMA) deep H i survey, we report the first untargeted detection of an OHM at z > 0.5, LADUMA J033046.20-275518.1 (nicknamed "Nkalakatha"). The host system, WISEA J033046.26-275518.3, is an infrared-luminous radio galaxy whose optical redshift z ≈ 0.52 confirms the MeerKAT emission-line detection as OH at a redshift z OH = 0.5225 ± 0.0001 rather than H i at lower redshift. The detected spectral line has 18.4σ peak significance, a width of 459 ± 59 km s-1, and an integrated luminosity of (6.31 ± 0.18 [statistical] ± 0.31 [systematic]) × 103 L ⊙, placing it among the most luminous OHMs known. The galaxy's far-infrared luminosity L FIR = (1.576 ±0.013) × 1012 L ⊙ marks it as an ultraluminous infrared galaxy; its ratio of OH and infrared luminosities is similar to those for lower-redshift OHMs. A comparison between optical and OH redshifts offers a slight indication of an OH outflow. This detection represents the first step toward a systematic exploitation of OHMs as a tracer of galaxy growth at high redshifts.
Compact formulae, dynamics and radiation of charged particles under synchro-curvature losses
Creators: name: Viganò, Daniele
name: Torres, Diego F.
name: Hirotani, Kouichi
name: Pessah, Martín E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We consider the fundamental problem of charged particles moving along and around a curved magnetic field line, revising the synchro-curvature radiation formulae introduced by Cheng and Zhang (1996). We provide more compact expressions to evaluate the spectrum emitted by a single particle, identifying the key parameter that controls the transition between the curvature-dominated and the synchrotron-dominated regime. This parameter depends on the local radius of curvature of the magnetic field line, the gyration radius, and the pitch angle. We numerically solve the equations of motion for the emitting particle by considering self-consistently the radiative losses, and provide the radiated spectrum produced by a particle when an electric acceleration is balanced by its radiative losses, as it is assumed to happen in the outer gaps of pulsar's magnetospheres. We compute the average spectrum radiated throughout the particle trajectory finding that the slope of the spectrum before the peak depends on the location and size of the emission region. We show how this effect could then lead to a variety of synchro-curvature spectra. Our results reinforce the idea that the purely synchrotron or curvature losses are, in general, inadequate to describe the radiative reaction on the particle motion, and the spectrum of emitted photons. Finally, we discuss the applicability of these calculations to different astrophysical scenarios.
description: 9 pages, 5 figures, 2 tables. Accepted for publication in MNRAS main journal. References updated
The baryonic collapse efficiency of galaxy groups in the RESOLVE and ECO surveys
Creators: name: Kannappan, S.J.
name: Stark, D.V.
name: Lagos, C.D.P.
name: Eckert, K.D.
name: Nasipak, Z.
name: Baker, A.D.
name: Norris, M.A.
name: Moffett, A.J.
name: Berlind, A.A.
Publisher: name: IOP Publishing Ltd
Year: 2017

description: We examine the z = 0 group-integrated stellar and cold baryonic (stars + cold atomic gas) mass functions (group SMF and CBMF) and the baryonic collapse efficiency (group cold baryonic to dark matter halo mass ratio) using the RESOLVE and ECO survey galaxy group catalogs and a GALFORM semi-analytic model (SAM) mock catalog. The group SMF and CBMF fall off more steeply at high masses and rise with a shallower low-mass slope than the theoretical halo mass function (HMF). The transition occurs at the group-integrated cold baryonic mass Mbary cold ~ 1011 M. The SAM, however, has significantly fewer groups at the transition mass ∼1011 M and a steeper low-mass slope than the data, suggesting that feedback is too weak in low-mass halos and conversely too strong near the transition mass. Using literature prescriptions to include hot halo gas and potential unobservable galaxy gas produces a group BMF with a slope similar to the HMF even below the transition mass. Its normalization is lower by a factor of ∼2, in agreement with estimates of warm-hot gas making up the remaining difference. We compute baryonic collapse efficiency with the halo mass calculated two ways, via halo abundance matching (HAM) and via dynamics (extended all the way to three-galaxy groups using stacking). Using HAM, we find that baryonic collapse efficiencies reach a flat maximum for groups across the halo mass range of Mhalo ~ 1011.4 - 12 M, which we label “nascent groups.” Using dynamics, however, we find greater scatter in baryonic collapse efficiencies, likely indicating variation in group hot-to-cold baryon ratios. Similarly, we see higher scatter in baryonic collapse efficiencies in the SAM when using its true groups and their group halo masses as opposed to friends-of-friends groups and HAM masses.
Additional file 12 of Investigation of autism-related transcription factors underlying sex differences in the effects of bisphenol A on transcriptome profiles and synaptogenesis in the offspring hippocampus
Creators: name: Thongkorn, Surangrat
name: Kanlayaprasit, Songphon
name: Kasitipradit, Kasidit
name: Lertpeerapan, Pattanachat
name: Panjabud, Pawinee
name: Hu, Valerie W.
name: Jindatip, Depicha
name: Sarachana, Tewarit
Publisher: name: figshare
Year: 2024
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 12. Biological functions, disorders, and pathways associated with the transcriptional targets of SOX5 that were dysregulated in the male hippocampus predicted by IPA software. Statistical significance was determined using Fisher’s exact test. A p-value < 0.05 was considered significant.
Radiation experience with the CMS pixel detector
Creators: name: Veszpremi, Viktor
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The CMS pixel detector is the innermost component of the CMS tracker occupying the region around the centre of CMS, where the LHC beams are crossed, between 4.3 cm and 30 cm in radius and 46.5 cm along the beam axis. It operates in a high-occupancy and high-radiation environment created by particle collisions. Studies of radiation damage effects to the sensors were performed throughout the first running period of the LHC. Leakage current, depletion voltage, pixel readout thresholds, and hit finding efficiencies were monitored as functions of the increasing particle fluence. The methods and results of these measurements will be described together with their implications to detector operation as well as to performance parameters in offline hit reconstruction.
description: 10 pages, 11 figures, conference proceedings for International Workshop on Semiconductor Pixel Detectors for Particles and Imaging (PIXEL2014), elaborates on one section of arXiv:1402.0675; Corrected typos
D-brane instanton induced mu-terms and their hierarchical structure
Creators: name: Abe, Hiroyuki
name: Kobayashi, Tatsuo
name: Tatsuta, Yoshiyuki
name: Uemura, Shohei
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the mu-term matrix of Higgs pairs induced by the D-brane instanton effects in intersecting D6-brane models compactified on T6. It is found that the mu-term matrix has a certain permutation symmetry and its eigenvalues have large hierarchical structure without fine tuning.
description: 10 pages, 2 figures
LADUMA: looking at the distant universe with the MeerKAT array
Creators: name: Blyth, S.-L.
name: Gawiser, E.
name: Holwerda, B.W.
name: Cunnama, D.
name: Crawford, S.M.
name: Rawlings, S.
name: Zwart, J.T.L.
name: Chemin, L.
name: Skelton, R.
name: Henning, P.A.
name: Klöckner, H.-R.
name: Srianand, R.
name: van Driel, W.
name: Baker, A.J.
name: Davé, R.
name: Williams, T.B.
name: Lah, P.
name: Makhathini, S.
name: Oh, S.-H.
name: Lehnert, M.D.
name: Ravindranath, S.
name: Cress, C.M.
name: Smirnov, O.M.
name: Fernández, X.
name: February, S.
name: Staveley-Smith, L.
name: Verheijen, M.A.W.
name: Oosterloo, T.A.
name: Meurer, G.R.
name: Meyer, M.J.
name: Jarvis, M.J.
name: Bershady, M.A.
name: Darling, J.K.
name: Heywood, I.
name: Frank, B.S.
name: Hughes, J.P.
name: Walter, F.
name: Hess, K.M.
name: Bassett, B.A.
name: Woudt, P.A.
name: de Blok, W.J.G.
name: Schinnerer, E.
name: Catinella, B.
name: Vaccari, M.
name: Morganti, R.
name: Bouchard, A.
name: Popping, A.
name: Wu, J.F.
name: Briggs, F.H.
name: Leroy, A.K.
name: Zwaan, M.A.
name: Elson, E.C.
name: Sheth, K.
name: Moodley, K.
name: Pisano, D.J.
name: Smith, M.
name: Schröder, A.C.
name: Kannappan, S.J.
name: Kereš, D.
name: Somerville, R.S.
name: Deane, R.P.
name: van der Heyden, K.J.
name: Stewart, I.M.
name: Kraan-Korteweg, R.C.
name: Maddox, N.
name: Wilcots, E.M.
name: Väisänen, P.
name: Popping, G.
name: Obreschkow, D.
name: Lochner, M.
name: Faltenbacher, A.
name: Katz, N.S.
Publisher: name: Sissa Medialab Srl
Year: 2016

description: The cosmic evolution of galaxies’ neutral atomic gas content is a major science driver for the Square Kilometre Array (SKA), as well as for its South African (MeerKAT) and Australian (ASKAP) precursors. Among the H I large survey programs (LSPs) planned for ASKAP and MeerKAT, the deepest and narrowest tier of the “wedding cake” will be defined by the combined L-band+UHF-band Looking At the Distant Universe with the MeerKAT Array (LADUMA) survey, which will probe H I in emission within a single “cosmic vuvuzela” that extends to z = 1.4, when the universe was only a third of its present age. Through a combination of individual and stacked detections (the latter relying on extensive multi-wavelength studies of the survey’s target field), LADUMA will study the redshift evolution of the baryonic Tully–Fisher relation and the cosmic H I density, the variation of the H I mass function with redshift and environment, and the connection between H I content and galaxies’ stellar properties (mass, age, etc.). The survey will also build a sample of OH megamaser detections that can be used to trace the cosmic merger history. This proceedings contribution provides a brief introduction to the survey, its scientific aims, and its technical implementation, deferring a more complete discussion for a future article after the implications of a recent review of MeerKAT LSP project plans are fully worked out.
Superfluid and Metamagnetic Phase Transitions in $ω$-deformed Gauged Supergravity
Creators: name: Cremonini, Sera
name: Pang, Yi
name: Pope, C. N.
name: Rong, Junchen
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study non-supersymmetric truncations of $ω$-deformed ${\cal N}=8$ gauged supergravity that retain a $U(1)$ gauge field and three scalars, of which two are neutral and one charged. We construct dyonic domain-wall and black hole solutions with AdS$_4$ boundary conditions when only one (neutral) scalar is non-vanishing, and examine their behavior as the magnetic field and temperature of the system are varied. In the infrared the domain-wall solutions approach either dyonic AdS$_2 \times \mathbb{R}^2$ or else Lifshitz-like, hyperscaling violating geometries. The scaling exponents of the latter are $z=3/2$ and $θ= -2$, and are independent of the $ω$-deformation. New $ω$-dependent AdS$_4$ vacua are also identified. We find a rich structure for the magnetization of the system, including a line of metamagnetic first-order phase transitions when the magnetic field lies in a particular range. Such transitions arise generically in the $ω$-deformed theories. Finally, we study the onset of a superfluid phase by allowing a fluctuation of the charged scalar field to condense, spontaneously breaking the abelian gauge symmetry. The mechanism by which the superconducting instability ceases to exist for strong magnetic fields is different depending on whether the field is positive or negative. Finally, such instabilities are expected to compete with spatially modulated phases.
description: 43 pages, 11 figures. Discussion of counterterms extended, references added
Energy fluctuation and discontinuity of specific heat
Creators: name: Biswas, Shyamal
name: Mitra, Joydip
name: Bhattacharyya, Saugata
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Specific heat per particle ($c_v$) of an ideal gas, in many occasions, is interpreted as energy fluctuation per particle ($\triangleε^2$) of the ideal gas through the relation: $\triangleε^2=kT^2c_v$, where $k$ is the Boltzmann constant and $T$ is the temperature. This relationship is true only in the classical limit, and deviates significantly in the quantum degenerate regime. We have analytically explored quantum to classical crossover of this relationship, in particular, for 3-D free Bose and Fermi gases. We also have explored the same for harmonically trapped cases. We have obtained a hump of $\triangleε^2/kT^2c_v^{(\text{cl})}$ around the condensation point for 3-D harmonically trapped Bose gas. We have discussed the possibility of occurring phase transition with discontinuity of heat capacity from existence of such a hump for other Bose and Fermi systems.
description: The core of the paper is a conjecture that links the existence of a maximum (hump) in the scaled energy fluctuations to the discontinuity of the specific heat. 6 pages, 3 figures. Published in Journal of Statistical Mechanics: Theory and Experiment
The surface mass density and structure of the outer disk of NGC 628
Creators: name: Herbert-Fort, S.
name: Christlein, D.
name: Zaritsky, D.
name: Kannappan, S.J.
Publisher: name: Institute of Physics Publishing
Year: 2010

description: We study the kinematics of GALEX-selected Hα knots in the outer disk (beyond R 25) of NGC 628 (M74), a galaxy representative of large, undisturbed, extended UV (type 1 XUV) disks. Our spectroscopic target sample of 235 of the bluest UV knots surrounding NGC 628 yielded 15 Hα detections (6%), roughly the number expected given the different mean ages of the two populations. The measured vertical velocity dispersion of the Hα knots between 1and1.8 R 25 (13.5-23.2 kpc) is <11 km s-1. We assume that the Hα knots trace an "intermediate" vertical mass density distribution (between the isothermal sech2(z) and exponential distributions) with a constant scale height across the outer disk (h z = 700 pc) and estimate a total surface mass density of 7.5 M pc-2. This surface mass density can be accounted for by the observed gas and stars in the outer disk (little or no dark matter in the disk is required). The vertical velocity dispersion of the outer disk Hα knots nearly matches that measured from older planetary nebulae near the outskirts of the optical disk by Herrmann et al., suggesting a low level of scattering in the outer disk. A dynamically cold stellar component extending nearly twice as far as the traditional optical disk poses interesting constraints on the accretion history of the galaxy.
Sub-Megaparsec Individual Photometric Redshift Estimation from Cosmic Web Constraints
Creators: name: Aragon-Calvo, Miguel A.
name: van de Weygaert, Rien
name: Jones, Bernard J. T.
name: Mobasher, Bahram
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present a method, PhotoWeb, for estimating photometric redshifts of individual galaxies, and their equivalent distance, with megaparsec and even sub-megaparsec accuracy using the Cosmic Web as a constraint over photo-z estimates. PhotoWeb redshift errors for individual galaxies are of the order of delta_z = 0.0007, compared to errors of delta_z = 0.02 for current photo-z techniques. The mean redshift error is of the order of 0.00005-0.0004 compared to mean errors in the range delta_z =z 0.001-0.01 for the best available photo-z estimates in the literature. Current photo-z techniques based on the spectral energy distribution of galaxies and projected clustering produce redshift estimates with large errors due to the poor constraining power the galaxy's spectral energy distribution and projected clustering can provide. The Cosmic Web, on the other hand, provides the strongest constraints on the position of galaxies. The network of walls, filaments and voids occupy ~%10 of the volume of the Universe, yet they contain ~%95 of galaxies. The cosmic web, being a cellular system with well-defined boundaries, sets a restricted set of intermittent positions a galaxy can occupy along a given line-of-sight. Using the information in the density field computed from spectroscopic redshifts we can narrow the possible locations of a given galaxy along the line of sight from a single broad probability distribution (from photo-z) to one or a few narrow peaks. Our first results improve previous photo-z errors by more than one order of magnitude allowing sub-megaparsec errors in some cases. Such accurate estimates for tens of millions of galaxies will allow unprecedented galaxy-LSS studies. In this work we apply our technique to the SDSS photo-z galaxy sample and discuss its performance and future improvements.
description: Final version submitted to MNRAS
Systematic uncertainties in stellar mass estimation for distinct galaxy populations
Creators: name: Kannappan, S.J.
name: Gawiser, E.
Publisher: name: Institute of Physics Publishing
Year: 2007

description: We show that different stellar mass estimation methods yield overall mass scales that disagree by factors up to ∼2 for the z = 0 galaxy population and, more importantly, relative mass scales that sometimes disagree by factors ≳3 between distinct classes of galaxies (spiral/irregular types, classical E/SOs, and E/SOs whose colors reflect recent star formation). This comparison considers stellar mass estimates based on (1) two different calibrations of the correlation between K-band mass-to-light ratio and B -R color and (2) detailed fitting of UBRJHK photometry and optical spectrophotometry using two different population synthesis models (Bruzual-Charlot and Maraston), with the same initial mass function in all cases. We also compare stellar+gas masses with dynamical masses. This analysis offers only weak arguments for preferring a particular stellar mass estimation method, given the plausibility of real variations in dynamical properties and dark matter content. These results help to calibrate the systematic uncertainties inherent in mass-based evolutionary studies of galaxies, including comparisons of low- and high-redshift galaxies.
Longitudinal dynamics between anxiety and depression in bipolar disorder
Creators: name: Kim, Hanjoo
name: Sperry, Sarah
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences

description: Anxiety and depression are highly prevalent and co-occurring among individuals with bipolar spectrum disorders compared with the general population. The extent to which individuals with bipolar spectrum disorders suffer from anxiety and depression is associated with a series of negative outcomes including poorer quality of life, greater treatment resistance, and decreased likelihood of recovery. However, the extant literature has largely concentrated on either of the symptoms as a comorbid condition of bipolar spectrum disorders. Moreover, none of the previous studies to our knowledge examined the bi-directional associations between anxiety and depression, as well as their cumulative impact on functioning across the course of bipolar disorder. Identifying temporal associations between anxiety and depression can help develop more effective treatment interventions for individuals with bipolar spectrum disorders. Leveraging the Prechter Longitudinal Study of Bipolar Disorder, we aim to answer these questions: 1) What are the overall temporal associations between anxiety and depression in individuals across the bipolar spectrum (Does a within-person change in anxiety symptoms tend to precipitate a change in depressive symptoms? Does a within-person change in depressive symptoms tend to precipitate a change in anxiety symptoms? Or, for some people is both true indicating a vicious cycle?), and 2) Can subgroups of individuals be identified by their temporal associations between anxiety and depression? Individuals in the Prechter Longitudinal Study completed dimensional measures of anxiety (GAD-7) and depression (PHQ-9) every two months as well as clinician-rated symptom scales (YMRS, HAM-D) which were administered every 12 months throughout participation.
SN 2005cg: Explosion physics and circumstellar interaction of a normal type la supernova in a low-luminosity host
Creators: name: Rykoff, E.
name: Rujopakarn, W.
name: Akerlof, C.W.
name: Kannappan, S.J.
name: Wheeler, J.C.
name: Hoflich, P.
name: Gerardy, C.L.
name: Quimby, R.
Publisher: name: Institute of Physics Publishing
Year: 2006

description: We present the spectral evolution, light curve, and corresponding interpretation for the "normal-bright" Type la supernova 2005cg discovered by ROTSE-IIIc. The host is a low-luminosity (Mr = -16.75) blue galaxy with strong indications of active star formation and an environment similar to that expected for SNe la at high redshifts. Earlytime (t ̃ -10 days) optical spectra obtained with the HET reveal an asymmetric, triangular-shaped Si II absorption feature at about 6100 Å with a sharp transition to the continuum at a blueshift of about 24,000 km s-1. By 4 days before maximum, the Si n absorption feature becomes symmetric with smoothly curved sides. Similar Si n profile evolution has previously been observed in other supemovae and is predicted by some explosion models, but its significance has not been fully recognized. Although the spectra predicted by pure deflagration and delayed detonation models are similar near maximum light, they predict qualitatively different chemical abundances in the outer layers and thus give qualitatively different spectra at the earliest phases. The Si line observed in SN 2005cg at early times requires the presence of burning products at high velocities, and the triangular shape is likely to be formed in an extended region of slowly declining Si abundance that characterizes delayed detonation models. The spectra show a high-velocity Ca n IR feature that coincides in velocity space with the Si n cutoff. This supports the interpretation that the Ca n is formed when the outer layers of the SN ejecta sweep up about 5 × 10-3 M, of material within the progenitor system. We compare our results with other "Branch-normal" SNe la with early-time spectra, namely, SN 2003du, 1999ee, and 1994D. Although the expansion velocities based on their Si n absorption minima differ, all show triangular-shaped profiles and velocity cutoffs between 23,000 and 25,000 km s-1, which are consistent with the Doppler shifts of their respective high-velocity Ca II IR features. SN 1990N-like objects, however, showed distinctly different behavior, which may suggest separate progenitor subclasses.
AVDS letter to Dr. Danny Jacobs, Dr. Derek Du Vivier, and members of the OHSU Anti-Racism Task Force
Creators: name: Alliance For Visible Diversity In Science
Publisher: name: Zenodo
Year: 2020
Subjects: graduate science education, research, diversity, anti-racism, organizational transformation, BIPOC, OHSU, racial equity, DEI

description: In this letter, the Alliance for Visible Diversity in Science (AVDS) provides feedback to OHSU leadership on the racial equity initiatives and work the institution is proposing and echoes the frustrations expressed by OHSU’s Black Employee Resource Group (BERG). The letter emphasizes the following of critical importance: listen to the BIPOC community, stop exploiting BIPOC labor, and interrogate actions.
An overview of reviews on the association of low calorie sweetener consumption with body weight and adiposity
Creators: name: Higgins, Kelly
name: Rawal, Rita
name: Kramer, Matthew
name: Klurfeld, David
name: Baer, David
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Human and Clinical Nutrition
subject: Nutrition
subject: Nutritional Epidemiology
subject: Life Sciences
subject: Social and Behavioral Sciences
subject: adiposity
subject: body weight
subject: low calorie sweeteners
subject: overview of reviews
subject: umbrella review

description: We plan to conduct an overview of reviews on the association of low calorie sweetener (LCS) consumption with body weight and adiposity to highlight how the inclusion of different populations, intervention/exposures, comparators, outcomes, and study designs within a systematic review produce varying conclusions regarding the efficacy of LCS for body weight management.
A Steady-State Picture of Solar Wind Acceleration and Charge State Composition Derived from a Global Wave-Driven MHD Model
Creators: name: Oran, Rona
name: Landi, Enrico
name: van der Holst, Bart
name: Lepri, Susan T.
name: Vásquez, Alberto M.
name: Nuevo, Federico. A.
name: Frazin, Richard
name: Manchester, Ward B.
name: Sokolov, Igor V.
name: Gombosi, Tamas I.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The higher charge states found in slow ($
description: Submitted to the Astrophysical Journal
Nonlocal General Relativity
Creators: name: Mashhoon, B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A brief account of the present status of the recent nonlocal generalization of Einstein's theory of gravitation is presented. The main physical assumptions that underlie this theory are described. We clarify the physical meaning and significance of Weitzenböck's torsion, and emphasize its intimate relationship with the gravitational field, characterized by the Riemannian curvature of spacetime. In this theory, nonlocality can simulate dark matter; in fact, in the Newtonian regime, we recover the phenomenological Tohline-Kuhn approach to modified gravity. To account for the observational data regarding dark matter, nonlocality is associated with a characteristic length scale of order 1 kpc. The confrontation of nonlocal gravity with observation is briefly discussed.
description: 23 pages; v:2 slightly expanded version. Dedicated to the memory of M. Hossein Partovi (1941-2014)
UBVRI Light curves of 44 Type Ia supernovae
Creators: name: Carter, B.J.
name: Krockenberger, M.
name: Donnelly, R.H.
name: Buckley, J.H.
name: Eriksen, K.A.
name: Peters, W.
name: Falco, E.E.
name: Luhman, K.L.
name: Rines, K.
name: Fiore, F.
name: Alves, J.F.
name: Peters, J.
name: Sobczak, G.J.
name: Mader, J.A.
name: Muench, A.A.
name: Briceño, C.
name: Concannon, K.D.
name: Muzerolle, J.
name: Thomas Megeath, S.
name: Naranjo, O.
name: Caldwell, N.
name: Calkins, M.L.
name: Hicken, M.
name: Fabricant, D.G.
name: Groner, T.
name: Soderberg, A.M.
name: Raymond, J.C.
name: Barton, E.J.
name: Jayawardhana, R.
name: Barmby, P.
name: Kannappan, S.J.
name: Spahr, T.B.
name: Balog, Z.
name: Arce, H.G.
name: Willner, S.P.
name: Mossman, A.E.
name: Szentgyorgyi, A.H.
name: Muñoz, J.A.
name: Haisch Jr., K.E.
name: Garnavich, P.M.
name: Kirshner, R.P.
name: Mahdavi, A.
name: Hartmann, L.
name: Väisänen, P.
name: Moraru, D.
name: Vikhlinin, A.
name: Garcia, M.R.
name: Marsden, B.G.
name: Groot, P.J.
name: Gómez, M.
name: Holman, M.J.
name: Mcleod, B.A.
name: Huchra, J.P.
name: Bragg, A.E.
name: Stefanik, R.P.
name: Jerius, D.
name: Zajac, J.M.
name: Stauffer, J.R.
name: Zhao, P.
name: Kochanek, C.S.
name: Wolk, S.J.
name: Nelson-Patel, K.
name: Tollestrup, E.V.
name: Matheson, T.
name: Pahre, M.A.
name: Marengo, M.
name: Hergenrother, C.W.
name: Wang, Z.
name: Grogin, N.A.
name: Mcnamara, B.R.
name: Kleyna, J.T.
name: Kim, D.-W.
name: Brown, W.R.
name: Lada, C.J.
name: Jha, S.
name: Challis, P.
name: Stanek, K.Z.
name: Koranyi, D.M.
name: Luu, J.X.
name: Macri, L.M.
name: Graves, G.J.M.
name: Schild, R.E.
name: Berlind, P.
name: Patten, B.M.
Publisher: name: Institute of Physics Publishing
Year: 2006

description: We present UBVRI photometry of 44 Type la supernovae (SNe la) observed from 1997 to 2001 as part of a continuing monitoring campaign at the Fred Lawrence Whipple Observatory of the Harvard-Smithsonian Center for Astrophysics. The data set comprises 2190 observations and is the largest homogeneously observed and reduced sample of SNe la to date, nearly doubling the number of well-observed, nearby SNe la with published multicolor CCD light curves. The large sample of [U-band photometry is a unique addition, with important connections to SNe la observed at high redshift. The decline rate of SN la U-band light curves correlates well with the decline rate in other bands, as does the U - B color at maximum light. However, the U-band peak magnitudes show an increased dispersion relative to other bands even after accounting for extinction and decline rate, amounting to an additional ∼40% intrinsic scatter compared to the B band.
Mapping the Dynamics of a Giant Ly-alpha Halo at z=4.1 with MUSE: The Energetics of a Large Scale AGN-Driven Outflow around a Massive, High-Redshift Galaxy
Creators: name: Swinbank, Mark
name: Vernet, Joel
name: Smail, Ian
name: De Breuck, Carlos
name: Bacon, Roland
name: Contini, Thierry
name: Richard, Johan
name: Rottgering, Huub
name: Urrutia, Tanya
name: Venemans, Bram
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present deep MUSE integral-field unit (IFU) spectroscopic observations of the giant (~150 x 80 kpc) Ly-alpha halo around the z=4.1 radio galaxy TNJ J1338-1942. This 9-hr observation maps the two-dimensional kinematics of the Ly-alpha emission across the halo. We identify two HI absorbers which are seen against the Ly-alpha emission, both of which cover the full 150 x 80 kpc extent of the halo and so have covering fractions ~1. The stronger and more blue-shifted absorber (dv~1200 km/s) has dynamics that mirror that of the underlying halo emission and we suggest that this high column material (n(HI) ~ 10^19.4 /cm^2), which is also seen in CIV absorption, represents an out-flowing shell that has been driven by the AGN (or star formation) within the galaxy. The weaker (n(HI)~10^14 /cm^2) and less blue shifted (dv~500 km/s) absorber most likely represents material in the cavity between the out-flowing shell and the Ly-alpha halo. We estimate that the mass in the shell must be of order 10^10 Msol -- a significant fraction of the ISM from a galaxy at z=4. The large scales of these coherent structures illustrate the potentially powerful influence of AGN feedback on the distribution and energetics of material in their surroundings. Indeed, the discovery of high-velocity (~1000 km/s), group-halo-scale (i.e. >150 kpc) and mass-loaded winds in the vicinity of the central radio source are broadly in agreement with the requirements of models that invoke AGN-driven outflows to regulate star formation and black-hole growth in massive galaxies at early times.
description: 11 pages, 5 figures. MNRAS in press
Domain wall magneto-Seebeck effect
Creators: name: Krzysteczko, Patryk
name: Hu, Xiukun
name: Liebing, Niklas
name: Sievers, Sibylle
name: Schumacher, Hans W.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The interplay between charge, spin, and heat currents in magnetic nano systems subjected to a temperature gradient has lead to a variety of novel effects and promising applications studied in the fast-growing field of spincaloritronics. Here we explore the magnetothermoelectrical properties of an individual magnetic domain wall in a permalloy nanowire. In thermal gradients of the order of few Kelvin per micrometer along the long wire axis, we find a clear magneto-Seebeck signature due to the presence of a single domain wall. The observed domain wall magneto-Seebeck effect can be explained by the magnetization-dependent Seebeck coefficient of permalloy in combination with the local spin configuration of the domain wall.
Assessment of the effluents pollution using the Allium cepa test. A systematic review and meta-analysis.
Creators: name: VARGAS, MARCO
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Research Methods in Life Sciences
subject: Life Sciences
subject: Allium cepa

description: Environmental pollution is associated with the development of several human diseases. Water pollution generally occurs by the discards of domestic, industrial, and agrarian effluents near rivers. Wastewater is characterized by the heterogeneous chemical composition of interrelating chemical and biological pollutants. Therefore, the characterization of water pollution includes the physicochemical and biological characterization of wastewater. However, many reports indicate that wastewater could be considered a genotoxicant agent. for this reason, the toxicological tests include determining genotoxicity linked to wastewater. For this purpose, in vitro, and in vivo assays have been developed and employed. The genotoxic assay using Allium cepa is considered a robust bioassay that shows the acute toxic effects of several chemical compounds. The assay is performed in meristematic cells from roots of chemically exposed Allium cepa. Furthermore, the microscopic analyses assess wastewater's mutagenic, genotoxic and cytotoxic capacities. Considering the usefulness of the Allium cepa assay on genotoxic characterization from wastewater, this research aims to summarize the current evidence regarding assessing the genotoxic potential of wastewater employing the Allium cepa assay.