cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Possible Relations between Brightest Central Galaxies and Their Host Galaxies Clusters and Groups
Creators: name: Samir, R. M.
name: Shaker, A. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences
subject: F.2.2; I.2.7
subject: 14J60 (Primary) 14F05, 14J26 (Secondary)

description: The r-band of the Sloan Digital Sky Survey (SDSS) for 17,924 brightest cluster galaxies (BCGs) in clusters and groups within 0.02 z 0.20 are used to study possible environmental relations affecting the nature of these galaxies. We find a correlation between BCGs physical properties (the effective radius (Re ), absolute magnitude and central velocity dispersion (σ0 )) and their host groups and clusters velocity dispersion (σcl ). This type of relations suggests that the most massive groups or clusters host larger central galaxies. On the other hand, the σ0 /σcl ratio as a function of σcl is consistent with [10].
description: 5 pages, 6 figures
The chaos detector and commissioning result
Creators: name: Kermani, Mohammad Arjomand
Publisher: name: University of British Columbia
Year: 2009

description: The Canadian High Acceptance Orbit Spectrometer (CHAOS), which is a 360 degree magnetic spectrometer designed for use in various πN experiments, is introduced. The physics program, constituent elements of the detector, analysis techniques, and commis sioning results are discussed. In particular, π+p elastic scattering data acquired at an incident pion energy of 280 MeV with a singles trigger on a liquid hydrogen target are presented.
title: The Impact of Online Review Characteristics and Traveler Involvement on Outdoor Travel Decision-Making Intention: An Empirical Analysis Based on Survey and Experimental Study
Creators: name: Zhang, Yehan
Publisher: name: University of Wyoming Libraries
Year: 2024
Subjects: subject: online reviews
subject: sports tourism
subject: perceived usefulness
subject: decision-making intention
subject: involvement

description: To further explore the mechanism by which online reviews and traveler characteristics affect the willingness to make outdoor travel decisions under the normalization of the pandemic. This paper proposes research hypotheses based on the Technology Acceptance Model grounded in the stimulus-organism-response theory, online reviews from representative tourism platforms were collected as scenario samples, and a 2 x 2 mixed design experiment of online review valence (positive VS. negative) x online review category (viewing VS. participation) was designed. A total of 300 outdoor sports travelers were invited to participate in the experiment and survey. The empirical results show: 1) Online review valence is positively correlated with the decision-making intention for outdoor travel, and the impact of review type is not significant; in the interaction effect, when the review valence is positive, participatory reviews have a greater influence on consumers' positive decision-making intention for outdoor travel than viewing reviews; 2) Perceived usefulness has a mediating effect on the relationship between online review valence and decision-making intention, and negative reviews have a greater impact on travelers' perceived usefulness than positive reviews; 3) The category of reviews has a significant moderating effect on the valence and decision-making intention of online reviews, with participatory reviews showing a more pronounced effect; 4) Traveler involvement has a significant moderating effect on the relationship between online review valence and perceived usefulness, with a greater moderating effect on positive online reviews than negative reviews.
Collisional-radiative non-equilibrium impurity treatment for JOREK simulations
Creators: name: Hu, D.
name: Huijsmans, G. T. A.
name: Nardon, E.
name: Hoelzl, M.
name: Lehnen, M.
name: Bonfiglio, D.
name: Team, JOREK
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A collisional-radiative non-equilibrium impurity treatment for JOREK 3D nonlinear magneto-hydrodynamic (MHD) simulations has been developed. The impurities are represented by super-particles flowing along the fluid velocity field lines, while ionizing and recombining independently according to ADAS data and local fluid density and temperature. The non-equilibrium impurity contributions are then projected back to the fluid field for self-consistent time evolution. A 2D test case is used to compare the new non-equilibrium impurity model against previous Coronal Equilibrium (CE) impurity treatment, as well as to compare the non-equilibrium impurity behavior between the single and the two temperature model. Further, we conduct benchmark with previously published coronal non-equilibrium results by other 3D nonlinear MHD codes such as M3D-C1 and NIMROD. The new non-equilibrium treatment is shown to successfully capture the early phase cooling by weakly ionized impurities which the CE model missed. The benchmarks with M3D-C1 and NIMROD show general agreement in both the integrated quantities and the 2D profile evolution, despite the difference in the atomic model used. The above comparison and benchmark cases demonstrate the capability of the non-equilibrium impurity model for JOREK, paving the way for more sophisticated 3D non-linear Massive Material Injection (MMI) simulations which have important applications in disruption mitigation studies.
description: 31 pages, 19 figures
EventGraD: Event-Triggered Communication in Parallel Machine Learning
Creators: name: Ghosh, Soumyadip
name: Aquino, Bernardo
name: Gupta, Vijay
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Communication in parallel systems imposes significant overhead which often turns out to be a bottleneck in parallel machine learning. To relieve some of this overhead, in this paper, we present EventGraD - an algorithm with event-triggered communication for stochastic gradient descent in parallel machine learning. The main idea of this algorithm is to modify the requirement of communication at every iteration in standard implementations of stochastic gradient descent in parallel machine learning to communicating only when necessary at certain iterations. We provide theoretical analysis of convergence of our proposed algorithm. We also implement the proposed algorithm for data-parallel training of a popular residual neural network used for training the CIFAR-10 dataset and show that EventGraD can reduce the communication load by up to 60% while retaining the same level of accuracy. In addition, EventGraD can be combined with other approaches such as Top-K sparsification to decrease communication further while maintaining accuracy.
description: Published in Neurocomputing, Nov 2021
Recent developments in quasi-elastic scattering around the Coulomb barrier
Creators: name: Hagino, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We discuss two recent topics on heavy-ion quasi-elastic scattering at energies around the Coulomb barrier. The first topic is an application of quasi-elastic scattering at deep-subbarrier energies to extracting the surface diffuseness parameter of the nucleus-nucleus potential. The second topic is a coupled-channels analysis for the quasi-elastic barrier distribution for the $^{70}$Zn + $^{208}$Pb reaction. We show that the coupled-channels calculations which include the multi-phonon excitations in the colliding nuclei reproduce reasonably well the experimental excitation function for quasi-elastic scattering at backward angles and the barrier distribution for this reaction.
description: 9pages, 3 eps figures. Uses aipxfm.sty. A talk given at the TOURS2006: Tours Symposium on Nuclear Physics VI, September 5-8, 2006, Tours, France
Humboldt University Nubian Expedition 2005: Arbeiten im Bereich der Inselkonzession
Creators: name: Näser, Claudia
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 16 (2005): Der Antike Sudan
title: Physical Activity and Mental Health in College Students Before and During COVID-19
Creators: name: Bai, Yang
name: Burns, Ryan
name: Ma, Conrad
name: Curl, Azilee
name: Hudziak, Jim
name: Copeland, William E
Publisher: name: University of Wyoming Libraries
Year: 2024
Subjects: subject: mental health
subject: physical activity
subject: COVID-19
subject: college students

description: The purpose of this study was to examine longitudinal physical activity (PA) before and during COVID-19 using device-based assessment in a sample of college students. The participants were a convenience sample of first-year college students from the Wellness Environment study. A daily survey was distributed to the participants every night on a study app measured three mental health outcomes of mood, anxiety, and stress for 16 weeks. Participants wore Apple Watches to monitor PA. A total of 167 participants completed at least 50% of daily surveys and 20 days of valid Apple Watch data, which resulted in 11,387 participant-days’ of observations. Changes in average daily moderate-to-vigorous physical activity (MVPA) and step counts were examined week-over-week from an 8-week period before COVID to an 8-week period during COVID using cluster-robust piecewise regression (16-weeks total). Linear mixed models examined the association between PA and mental health outcomes, while also examining the moderating influence of COVID phase.
Laser-like Instabilities in Quantum Nano-electromechanical Systems
Creators: name: Bennett, S. D.
name: Clerk, A. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We discuss negative damping regimes in quantum nano-electromechanical systems formed by coupling a mechanical oscillator to a single-electron transistor (normal or superconducting). Using an analogy to a laser with a tunable atom-field coupling, we demonstrate how these effects scale with system parameters. We also discuss the fluctuation physics of both the oscillator and the single-electron transistor in this regime, and the degree to which the oscillator motion is coherent.
description: 4+ pages, 1 figure; reference to the work of Dykman and Krivoglaz added
Test of the Fluctuation Relation in lagrangian turbulence on a free surface
Creators: name: Bandi, M. M.
name: Cressman, J. R.
name: Goldburg, W. I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The statistics of lagrangian velocity divergence are studied for an assembly of particles in compressible turbulence on a free surface. Under an appropriate definition of entropy, the two-dimensional lagrangian velocity divergence of a particle trajectory represents the local entropy rate, a random variable. The statistics of this rate are shown to be in agreement with the fluctuation relation (FR) over a limited range. The probability distribution functions (PDFs) obtained in this analysis exhibit features different from those observed in previous experimental tests.
description: 10 Pages, 3 figures, 2 tables
title: Lower Extremity Kinematic and Kinetic Characteristics as Effects on Running Economy of Recreational Runners
Creators: name: Li, Fei
name: Chen, Shiqin
name: Segers, Veerle
name: Zhang, Qingshan
name: Zhang, Qin
name: Ding, Haiyong
Publisher: name: University of Wyoming Libraries
Year: 2024
Subjects: subject: energy cost
subject: biomechanics
subject: ground reaction force
subject: SPM

description: This study aims to investigate the relationship between running economy (RE) and running kinematics and kinetic parameters. A total of thirty male recreational runners (age: 21.21±1.22 years, VO2max: 54.61±5.42 ml·kg-1·min-1) participated in two separate test sessions. In the first session, the participant’s body composition and RE at 10 and 12 km·h-1 were measured. In the second session, measurements were taken for hip, knee, and ankle angles and range of motion (ROM), as well as ground reaction force.
Population statistics study of radio and gamma-ray pulsars in the Galactic plane
Creators: name: Gonthier, Peter L.
name: Story, Sarah A.
name: Clow, Brian D.
name: Harding, Alice K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results of our pulsar population synthesis of ordinary isolated and millisecond pulsars in the Galactic plane. Over the past several years, a program has been developed to simulate pulsar birth, evolution and emission using Monte Carlo techniques. We have added to the program the capability to simulate millisecond pulsars, which are old, recycled pulsars with extremely short periods. We model the spatial distribution of the simulated pulsars by assuming that they start with a random kick velocity and then evolve through the Galactic potential. We use a polar cap/slot gap model for $γ$-ray emission from both millisecond and ordinary pulsars. From our studies of radio pulsars that have clearly identifiable core and cone components, in which we fit the polarization sweep as well as the pulse profiles in order to constrain the viewing geometry, we develop a model describing the ratio of radio core-to-cone peak fluxes. In this model, short period pulsars are more cone-dominated than in our previous studies. We present the preliminary results of our recent study and the implications for observing these pulsars with GLAST and AGILE.
description: 6 pages, 3 figures, 1 table, accepted in Astrophysics and Space Science
Unitary $p$-wave Fermi gas in one dimension
Creators: name: Tajima, Hiroyuki
name: Tsutsui, Shoichiro
name: Doi, Takahiro M.
name: Iida, Kei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We elucidate universal many-body properties of a one-dimensional, two-component ultracold Fermi gas near the $p$-wave Feshbach resonance. The low-energy scattering in this system can be characterized by two parameters, that is, $p$-wave scattering length and effective range. At the unitarity limit where the $p$-wave scattering length diverges and the effective range is reduced to zero without conflicting with the causality bound, the system obeys universal thermodynamics as observed in a unitary Fermi gas with contact $s$-wave interaction in three dimensions. It is in contrast to a Fermi gas with the $p$-wave resonance in three dimensions in which the effective range is inevitably finite. We present the universal equation of state in this unitary $p$-wave Fermi gas within the many-body $T$-matrix approach as well as the virial expansion method. Moreover, we examine the single-particle spectral function in the high-density regime where the virial expansion is no longer valid. On the basis of the Hartree-like self-energy shift at the divergent scattering length, we conjecture that the equivalence of the Bertsch parameter across spatial dimensions holds even for a one-dimensional unitary $p$-wave Fermi gas.
description: 9 pages, 5 figures
title: The Effectiveness of Blood Flow Restriction Training for Post-Cast Removal Rehabilitation of Colles' Fracture
Creators: name: Yang, Mingming
name: Liang, Bin
name: Wang, Dan
Publisher: name: University of Wyoming Libraries
Year: 2024
Subjects: subject: blood flow restriction training
subject: fractures
subject: fracture rehabilitation

description: Distal radius fractures, particularly Colles' type, are prevalent among individuals over 50 years old. The common treatment involves plaster cast application, but studies revealed the decreased grip and pinch strength, wrist range of motion (ROM) loss, muscle resilience, and persistent hand disability post-fracture. Low-load resistance training is a traditional post-cast removal rehabilitation method, but it may limit muscle hypertrophy due to fewer recruited type II fibers. Blood flow restriction (BFR) training, involving partial arterial inflow restriction during low-intensity strength training, emerges as a promising alternative, mimicking high-intensity effects. BFR is effective in promoting muscle recovery in various musculoskeletal injuries.
Philae in Musawwarat es Sufra
Creators: name: Hallof, Jochen
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 16 (2005): Der Antike Sudan
title: Exploring Pre-Service Teachers and Their Use of the Sport Education Model across Two Progressive Practicum Experiences During a Physical Education Teacher Education Program
Creators: name: Sligar, Laci M
name: Wallhead, Tristan L
name: Simonton, Kelly
Publisher: name: University of Wyoming Libraries
Year: 2024
Subjects: subject: pre-service teachers
subject: sport education model
subject: practicum
subject: physical education

description: Sport Education (SE) is a curriculum and instructional model designed to provide students authentic positive sport experiences within physical education (Siedentop, 1994). Despite an extensive body of knowledge demonstrating the efficacy of the model in delivering on student learning outcomes, there remains a dearth of research that has theoretically explored how pre-service teachers learn, interpret and deliver the model. Previous research using the lens of occupational socialization has shown learning to teach SE comes with feelings of satisfaction, but pre-service teachers need to be provided with ample opportunity to experience and practice the model (McMahon & MacPhail, 2007). The purpose of this study was to use the OS perspective to examine the reasons why specific features of SE were delivered during two progressive school-based practicum experiences.
Additional file 8 of The pangenome of the wheat pathogen Pyrenophora tritici-repentis reveals novel transposons associated with necrotrophic effectors ToxA and ToxB
Creators: name: Gourlie, Ryan
name: McDonald, Megan
name: Hafez, Mohamed
name: Ortega-Polo, Rodrigo
name: Low, Kristin E.
name: Abbott, D. Wade
name: Strelkov, Stephen E.
name: Daayf, Fouad
name: Aboukhaddour, Reem
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 8. Intergenic distances of all genes in Pyrenophora tritici-repentis isolate D308. The 3’ intergenic length (x-axis) is the distance (bp) from the 3’ end of current gene to the 5’ end of next, and the 5’ intergenic length (y-axis) is the distance from the 3’ end of the previous gene to the 5’ end of the current gene.
Ultraviolet avalanche in anisotropic non-Abelian plasmas
Creators: name: Dumitru, Adrian
name: Nara, Yasushi
name: Strickland, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present solutions of coupled particle-field evolution in classical U(1) and SU(2) gauge theories in real time on three-dimensional lattices. For strongly anisotropic particle momentum distributions, we find qualitatively different behavior for the two theories when the field strength is high enough that non-Abelian self-interactions matter for SU(2). It appears that the energy drained by a Weibel-like plasma instability from the particles does not build up exponentially in transverse magnetic fields but instead returns, isotropically, to the hard scale via a rapid avalanche into the ultraviolet.
description: 22 pages, 10 figures; v3: small textual changes; updated to correspond with version to appear in publication
Embedded solitons in second-harmonic-generating lattices
Creators: name: Susanto, Hadi
name: Malomed, Boris A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Embedded solitons are exceptional modes in nonlinear-wave systems with the propagation constant falling in the system's propagation band. An especially challenging topic is seeking for such modes in nonlinear dynamical lattices (discrete systems). We address this problem for a system of coupled discrete equations modeling the light propagation in an array of tunnel-coupled waveguides with a combination of intrinsic quadratic (second-harmonic-generating) and cubic nonlinearities. Solutions for discrete embedded solitons (DESs) are constructed by means of two analytical approximations, adjusted, severally, for broad and narrow DESs, and in a systematic form with the help of numerical calculations. DESs of several types, including ones with identical and opposite signs of their fundamental-frequency and second-harmonic components, are produced. In the most relevant case of narrow DESs, the analytical approximation produces very accurate results, in comparison with the numerical findings. In this case, the DES branch extends from the propagation band into a semi-infinite gap as a family of regular discrete solitons. The study of stability of DESs demonstrates that, in addition to ones featuring the well-known property of semi-stability, there are linearly stable DESs which are genuinely robust modes.
title: How Sports Talents Are or Should Be Identified: The Development of the First Sport-Related Social Enterprice (PLACY) in Hong Kong
Creators: name: Ming, Choi Siu
Publisher: name: University of Wyoming Libraries
Year: 2024
Subjects: subject: PLACY
subject: social enterprise
subject: sports training
subject: physical literacy

description: The Physical Literacy Academy for Children and Youth (PLACY®) is the first sports-related social enterprise in Hong Kong SAR that provides a platform for the younger generation to assess their health conditions and increase awareness of the importance of sports in their lives. The business promotes the concept of sports for all and sports for life through early education on the importance of physical literacy. PLACY® also broadens the channel for sports talent identification (STI) and makes its programs more accessible to low-income families, thereby increasing the pool of potential elite athletes. Furthermore, PLACY® promotes social inclusion by providing assessments, consultations, and interventions tailored to different needs, including different anthropometric limitations, fitness abilities, and socio-economic statuses. The business also seeks sponsorships for individuals in need. Additionally, PLACY® aims to increase career opportunities for fitness professionals to become professional assessors and experienced consultants, further enhancing social inclusion. Due to the lack of standardized and comprehensive assessment of physical literacy, physical fitness, and sports talent identification for children and youth, a well-developed program and assessment are crucial to promoting a healthier lifestyle and excellence in sports performance. Schools and national sports associations prefer assessments to gauge the movement competency and fitness development of children and youth. Therefore, PLACY® provides physical literacy, physical fitness, and sports talent assessments, certifications, awards, rankings, and consultation and referral services for children and youth in Hong Kong. In the highly competitive sports training environment in Hong Kong, children and youth need support to understand their physical literacy and physical fitness levels so they can choose the sport that best suits them before entering an elite training system. Currently, there is a lack of structured and quality assessment and consultation programs in sports for children and youth in the market. Our services aim to fill this gap.
Archäologie, Verantwortung und Kulturerhalt — Die Rettungskampagne am Großen Hafir von Musawwarat 2005
Creators: name: Scheibner, Thomas
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 16 (2005): Der Antike Sudan
Are Proxima and Alpha Centauri Gravitationally Bound?
Creators: name: Wertheimer, Jeremy G.
name: Laughlin, Gregory
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using the most recent kinematic and radial velocity data in the literature, we calculate the binding energy of Proxima Centauri relative to the center of mass of the Alpha Centauri system. When we adopt the centroids of the observed data, we find that the three stars constitute a bound system, albeit with a semi-major axis that is on order the same size as Alpha Centauri AB's Hill radius in the galactic potential. We carry out a Monte Carlo simulation under the assumption that the errors in the observed quantities are uncorrelated. In this simulation, 44% of the trial systems are bound, and systems on the 1-3 sigma tail of the radial velocity distribution can have Proxima currently located near the apastron position of its orbit. Our analysis shows that a further, very significant improvement in the characterization of the system can be gained by obtaining a more accurate measurement of the radial velocity of Proxima Centauri.
description: 10 pages total, 4 pages of text, 1 page of references, 3 figures, and 2 tables This article will be published in The Astronomical Journal
title: Mind, Body and Spirit: Holistic Development Supports Student-Athletes In Accessing Peak Performance
Creators: name: Watson, Rachel
name: Boggs, Christine
Publisher: name: University of Wyoming Libraries
Year: 2024
Subjects: subject: holistic development
subject: student athletes
subject: performance

description: The International Nordic Ski Training and Coaching Program is a holistic scholar athlete development program at the University of Wyoming and in collaboration with the Shanghai University of Sport. The philosophy of the program centers on the belief that peak performance is reached only when student athletes integrate knowledge in physiology, technical and tactical approaches, general wellness, and psychological and philosophical pillars. Additionally, we contend that reaching peak performance requires that athletes are fully supported by coaches, support staff and governing bodies, all integrated into Nordic culture, and that scholar athletes are able to access healthy outdoor environments in which to train. This holistic curriculum is knit across the program, embedded in both classroom and experiential, place-based education. Three cohorts of scholar athletes have completed this program (N=29) and performance data show an average improvement of 35% over the course of only 8-months immersion. This performance trajectory would be equivalent to a 3000m running time dropping from 15 minutes to less than 10 minutes, or for a 20-year-old runner - a novice time to that of an elite 3000m runner.
Additional file 9 of The pangenome of the wheat pathogen Pyrenophora tritici-repentis reveals novel transposons associated with necrotrophic effectors ToxA and ToxB
Creators: name: Gourlie, Ryan
name: McDonald, Megan
name: Hafez, Mohamed
name: Ortega-Polo, Rodrigo
name: Low, Kristin E.
name: Abbott, D. Wade
name: Strelkov, Stephen E.
name: Daayf, Fouad
name: Aboukhaddour, Reem
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 9. Alignment of raw read data to long-read assemblies; a I-73-1; b D308.
Characterizing the X-ray Emission of Intermediate-Mass Pre-Main-Sequence Stars
Creators: name: Nuñez, Evan H.
name: Povich, Matthew S.
name: Binder, Breanna A.
name: Townsley, Leisa K.
name: Broos, Patrick S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We use X-ray and infrared observations to study the properties of three classes of young stars in the Carina Nebula: intermediate-mass (2--5~M$_\odot$) pre-main sequence stars (IMPS; i.e. intermediate-mass T Tauri stars), late-B and A stars on the zero-age main sequence (AB), and lower-mass T Tauri stars (TTS). We divide our sources among these three sub-classifications and further identify disk-bearing young stellar objects versus diskless sources with no detectable infrared (IR) excess emission using IR (1--8 $μ$m) spectral energy distribution modeling. We then perform X-ray spectral fitting to determine the hydrogen absorbing column density ($N_{\rm H}$), absorption-corrected X-ray luminosity ($L_{\rm X}$), and coronal plasma temperature ($kT$) for each source. We find that the X-ray spectra of both IMPS and TTS are characterized by similar $kT$ and $N_{\rm H}$, and on average $L_{\rm X}$/$L_{\rm bol} \sim4\times10^{-4}$. IMPS are systematically more luminous in X-rays (by $\sim$0.3 dex) than all other sub-classifications, with median $L_{\rm X} = 2.5\times10^{31}$ erg s$^{-1}$, while AB stars of similar masses have X-ray emission consistent with TTS companions. These lines of evidence converge on a magneto-coronal flaring source for IMPS X-ray emission, a scaled-up version of the TTS emission mechanism. IMPS therefore provide powerful probes of isochronal ages for the first $\sim$10 Myr in the evolution of a massive stellar population, because their intrinsic, coronal X-ray emission decays rapidly after they commence evolving along radiative tracks. We suggest that the most luminous (in both X-rays and IR) IMPS could be used to place empirical constraints on the location of the intermediate-mass stellar birth line.
description: Published September 21, 2021 in AJ , 18 pages, 13 figures
On the Detectability of Prompt Coherent GRB Radio Emission
Creators: name: Macquart, J. -P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Both induced Compton scattering and induced Raman scattering strongly limit the observability of the extremely bright (<< 10^21K), prompt coherent radio emission recently predicted to emanate from gamma-ray bursts. Induced Compton scattering is the main limiting factor when the region around the progenitor is not dense but when one still considers the scattering effect of the a tenuous circumburst ISM. For a medium of density 0.01 n_{0.01} cm^{-3} and a path length L_{kpc} kpc and emission that is roughly isotropic in its rest frame the brightness temperature is limited to < 3 x 10^18 Gamma_{100}^2 n_{0.01}^{-1} L_{\rm kpc}^{-1} K, where $100 Gamma_{100} is the Lorentz factor of the frame in which the emission occurs. Thus, for a burst at distance D the predicted emission is only visible if the jet is ultra-relativistic, with Gamma > 10^3 (D/100 Mpc), or if the intrinsic opening angle of the emission is extremely small. Thus the presence or absence of such radio emission provides an excellent constraint on the Lorentz factor of the GRB outflow during the very early stages of its outburst. Induced Raman scattering imposes an even more stringent limit independent of the emission opening angle, but only effective if GRB emission must propagate through a dense progenitor wind within ~ 10^{15} cm from the blast center.
description: ApJ Lett accepted
Aging tests for dielectric-coated aluminum to be used in the Sudbury Neutrino Observatory
Creators: name: McGarry, Louis J.
Publisher: name: University of British Columbia
Year: 2008

description: The Sudbury Neutrino Observatory is a heavy water Cerenkov detector designed to detect solar neutrinos. Its main objective is to confirm or negate the solar neutrino problem. To achieve maximum counting rates and, thus, minimum statistical uncertainties, collection of Cerenkov light must be maximized. Our group at UBC, working with collaborators at Oxford, have designed and tested an optical concentrator that couples with a photomultiplier tube to achieve an effective gain in light collection by nearly a factor of 2. We have designed a procedure for measuring the reflectivity of flat mirror immersed in water within the incident angular range of 15° to 750 to facilitate the reflectivity measurement of dielectric-coated aluminum (DCA) mirror—the reflective component in the the concentrators. DCA is a standard product used in lighting fixtures to enhance the total reflected light. We determined that our application would best be served with a dielectric coating that was 10% thinner than standard. Our DCA was manufactured with the thinner coating. To ensure that the mirror will not significantly deteriorate within the 10 year expected life span of the detector, equipment was designed and constructed that accelerates the aging of the mirror, allowing 10 year-equivalent aging to occur in 70 lab-days. The reflectivity of aged mirror was then measured to verify that no significant loss occured.
title: Exercise-Induced Microbial Changes in Preventing Type 2 Diabetes
Creators: name: Wang, Ru
Publisher: name: University of Wyoming Libraries
Year: 2024
Subjects: subject: microbial changes
subject: type 2 diabetes
subject: exercise prevention

description: ABSTRACT: Exercise has long been applied for the prevention and management of diabetes. However, the global metabolic reshaping induced by exercise and its specific impact on the gut microbiota to produce these benefits have not been fully elucidated. The purpose of this study is to investigate how exercise-induced alterations in the gut microbiome can prevent diabetes and to re-evaluated the link between the microbiota and physical fitness within a cohort of Chinese athlete students cohort.
Διοίκηση μονάδων υγείας: ηθικοκοινωνικά ζητήματα της περίθαλψης προσφύγων - μεταναστών στα δημόσια νοσοκομεία
Creators: name: Μπερσίμη, Ιφιγένεια Αντωνίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Πρόσφυγες - μετανάστες
Υγεία μεταναστών
Κοινωνικές διακρίσεις
Refugees - immigrants
Immigrants health
Social discrimination

description: Μέσα στα πλαίσια της διπλωματικής μου εργασίας επιχειρείται να καταγραφούν οι εννοιολογικοί προσδιορισμοί που αφορούν την ευάλωτη κοινωνική ομάδα των προσφύγων-μεταναστών/τριών καθώς και αυτοί της δημόσιας υγείας και της διοίκησης μονάδων υγείας. Αναφέρονται τα νομοθετικά πλαίσια που διέπουν την προσβασιμότητα των προσφύγων-μεταναστών/τριών, με ή χωρίς νομιμοποιητικά έγγραφα, στις υγειονομικές δομές της χώρας, οι περιορισμοί πρόσβασής τους στην υγειονομική περίθαλψη αλλά και ο ρόλος των λειτουργών υγείας και οι ηθικοκοινωνικοί προβληματισμοί αυτών στην παροχή υπηρεσιών υγείας. Γίνεται αναφορά στα προγράμματα που πραγματοποιούνται για τους ενήλικες και ανήλικες πρόσφυγες-μετανάστες/τριες από την Εκκλησία της Ελλάδος και τις εθελοντικές και Μη Κυβερνητικές Οργανώσεις που δραστηριοποιούνται στην Ελλάδα καθώς και για τη θέση της Ορθόδοξης Ελληνικής Εκκλησίας στην αντιμετώπιση του μεταναστευτικού ζητήματος και τον διακονικό χαρακτήρα που επιδεικνύει απέναντι στις ευάλωτες αυτές ομάδες. Τονίστηκαν ιδιαίτερα η αγάπη και η φιλοξενία ως πρωταρχικές χριστιανικές αρετές που χαρακτήριζαν και συνεχίζουν να χαρακτηρίζουν και να διέπουν, τους χριστιανούς όλων των εποχών. Τέλος, μέσα από τα χωρία της Αγίας Γραφής και των Πατερικών Κειμένων γίνεται μία προσπάθεια καταγραφής και προσέγγισης των εννοιών του πλησίον και του ξένου και παραλληλισμού τους με αυτές του/της πρόσφυγα και του/της μετανάστη/τριας.
description: Throughout my thesis it is attempted to document the conceptual identifications that refer to the vulnerable social group of refugees / immigrants as well as those of public health and health unit management. Also is mentioned is the legislative framework governing the accessibility of immigrants-refugees, with or without legal documents, to the health structures of the country, the access restrictions to health care as well as the role of health workers and their moral and social concerns in the provision of health services. Reference is made to programs organized for adults and minor immigrants-refugees by the Church of Greece and by voluntary and non-governmental organizations active in Greece, as well as to the position of the Greek Orthodox Church in addressing the migration issue and the ministering character it shows towards those vulnerable groups. It was especially emphasized that love and hospitality are primary Christian virtues that have characterized and continue to govern not only Christians of all times but also the people of Greece since ancient times. Finally, through the passages of the Holy Bible and the Patristic Texts, an attempt is being made to record and approach the concept of the neighbor and the foreign and its parallel to the refugee/immigrant.
title: Information Technology-Assisted Sport Pedagogy and Assessments: Achievements, Lessons Learnt, and Challenges to Overcome
Creators: name: Ha, Amy Sau-Ching
Publisher: name: University of Wyoming Libraries
Year: 2024
Subjects: subject: sport pedagogy
subject: information technology assisted

description: Information technology has become an integral part of many people’s lives and is widely applied in many facets of education. For example, technological applications for activity measurement, such as the use of pedometers, heart rate monitors, or accelerometers, are common in physical education research. The ability to provide objective, accurate assessment of students’ physical activity is an important element in Quality Physical Education, a concept adopted by UNESCO, which highlights the role of school physical education in children’s overall well-being development. Nevertheless, similar digital tools are not frequently applied in frontline teaching. Further, unlike the measurement of physical activity quantity, technology-assisted teaching, and assessment tools for the measurement of movement quality are scarce. With motion capturing devices such as infrared depth cameras being very affordable, such technologies could be capitalized to capture and analyze movement skill performances. In this talk, I will share real-life examples of how technology application could be applied to school physical education (and beyond) and explain how these led to enhancements in teachers’ teaching effectiveness and students’ learning experiences in Hong Kong. Challenges faced and potential solutions at technological and implementation levels will be discussed. While some of the challenges have remained partially unresolved, and new obstacles could be expected in the future, the processes of navigating through these barriers have led to new ideas and opportunities, such as the use of artificial intelligence in movement quality assessment. The continuous advancement of technology and data analytical approaches will open doors to novel assessment approaches and methods to tackle research questions that were previously unachievable. By maintaining optimism and being open-minded to new opportunities, researchers and frontline teachers could work in tandem to further shift the field closer to the idealistic goal of delivering Quality Physical Education to all students across the globe.
Struktur II C-V
Creators: name: Mucha, Rebekka
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 16 (2005): Der Antike Sudan
Understanding the Dyer-Roeder approximation as a consequence of local cancellations of projected shear and expansion rate fluctuations
Creators: name: Koksbang, S. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It is shown with several concrete examples that the Dyer-Roeder approximation is valid in spacetimes which fulfill the condition that fluctuations in the expansion rate along a light ray locally cancels with the shear contribution to the redshift. This is the case for standard cosmological scenarios including perturbed FLRW spacetimes, N-body simulations and Swiss-cheese models. With another concrete example it is then illustrated that it is possible to construct statistically homogeneous and effectively statistically isotropic cosmological models which do not fulfill the condition. In this case, the Dyer-Roeder approximation is invalid. Instead, the mean redshift-distance relation can be described using a relation based on the spatial averages of the transparent part of the spacetime.
description: 15 pages, 11 captioned figures. Accepted for publication in PRD
Untersuchungen in der Umgebung der Kleinen Anlage (I B)
Creators: name: Mucha, Rebekka
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 16 (2005): Der Antike Sudan
Structured Graph Learning for Scalable Subspace Clustering: From Single-view to Multi-view
Creators: name: Kang, Zhao
name: Lin, Zhiping
name: Zhu, Xiaofeng
name: Xu, Wenbo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Graph-based subspace clustering methods have exhibited promising performance. However, they still suffer some of these drawbacks: encounter the expensive time overhead, fail in exploring the explicit clusters, and cannot generalize to unseen data points. In this work, we propose a scalable graph learning framework, seeking to address the above three challenges simultaneously. Specifically, it is based on the ideas of anchor points and bipartite graph. Rather than building a $n\times n$ graph, where $n$ is the number of samples, we construct a bipartite graph to depict the relationship between samples and anchor points. Meanwhile, a connectivity constraint is employed to ensure that the connected components indicate clusters directly. We further establish the connection between our method and the K-means clustering. Moreover, a model to process multi-view data is also proposed, which is linear scaled with respect to $n$. Extensive experiments demonstrate the efficiency and effectiveness of our approach with respect to many state-of-the-art clustering methods.
The Melting Line of Hydrogen at High Pressures
Creators: name: Deemyad, Shanti
name: Silvera, Isaac F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The insulator to metal transition in solid hydrogen was predicted over 70 years ago but the demonstration of this transition remains a scientific challenge. In this regard, a peak in the temperature vs. pressure melting line of hydrogen may be a possible precursor for metallization. However, previous measurements of the fusion curve of hydrogen have been limited in pressure by diffusion of hydrogen into the gasket or diamonds. To overcome this limitation we have used an innovative technique of pulsed laser heating of the sample and final peak in the melting line at P=64.7+-4GPa and T=1055+-20 K.
description: 11 pages
Magnetic fields in evolving galaxies
Creators: name: Rodrigues, Luiz Felippe Santiago
Publisher: name: Zenodo
Year: 2019

description: Slides presented for talk at the "New Perspectives on Galactic Magnetism" conference in Newcastle, UK, on 13 June 2019.
description: {"references": ["L F S Rodrigues, L Chamandy, A Shukurov, C M Baugh, A R Taylor, Evolution of galactic magnetic fields, Monthly Notices of the Royal Astronomical Society, Volume 483, Issue 2, February 2019, Pages 2424\u20132440, https://doi.org/10.1093/mnras/sty3270"]}
Near Ultraviolet sources in the Great Observatories Origins Deep Survey Fields
Creators: name: de Mello, Duilia
name: Dahlen, T.
name: Gardner, J. P.
name: Grogin, N. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an Ultraviolet (UV) selected sample of 268 objects in the two fields of the Great Observatories Origins Deep Survey (GOODS). We used the parallel observations taken with WFPC2 in the U--band (F300W) which covered 88% of the GOODS fields to identify sources and selected only objects with GOODS/ACS counterparts. Spectroscopic redshifts for 95 of these sources are available and we have used the multiwavelength GOODS data to estimate photometric redshifts for the others. Most of the objects are between 0.2
description: 23 pages, 13 figures, accepted by the Astronomical Journal
L'Apprentissage Automatique dans la planification et le contr{ô}le de la production : un {é}tat de l'art
Creators: name: Cadavid, Juan Pablo Usuga
name: Lamouri, Samir
name: Grabot, Bernard
name: Fortin, Arnaud
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Proper Production Planning and Control (PPC) is capital to have an edge over competitors, reduce costs and respect delivery dates. With regard to PPC, Machine Learning (ML) provides new opportunities to make intelligent decisions based on data. Therefore, this communication provides an initial systematic review of publications on ML applied in PPC. The research objective of this study is twofold: firstly, it aims to identify techniques and tools allowing to apply ML in PPC, and secondly, it reviews the characteristics of Industry 4.0 (I4.0) in recent research papers. Concerning the second objective, seven characteristics of I4.0 are used in the analysis framework, from which two of them are proposed by the authors. Additionally, the addressed domains of ML-aided PPC in scientific literature are identified. Finally, results are analyzed and gaps that may motivate further research are highlighted.
description: in French