cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Gut Virome is Associated with Stress-Induced Changes in Behaviour and Immune Responses in Mice
Creators: name: Bastiaanssen, Thomaz
name: Ritz, Nathaniel
name: Turkington, Christopher
Publisher: name: Zenodo
Year: 2024

description: The microbiota-gut-brain axis has been shown to play an important role in stress response, however, previous work has focused primarily on the role of the bacteriome. The gut virome constitutes a major portion of the microbiome, with bacteriophages having the potential to remodel bacteriome structure and activity. Here, we use a mouse model of chronic social stress, and employ 16S rRNA and whole metagenomic sequencing on faecal pellets to determine how the virome is modulated by and contributes to the effects of stress. We find that chronic stress led to behavioural, immune, and bacteriome alterations in mice that were associated with changes in the bacteriophage class Caudoviricetes and unassigned viral taxa. To determine if these changes were causally related to stress-associated behavioural or physiological outcomes, we conducted a faecal virome transplant from mice before stress and autochthonously transferred it to mice undergoing chronic social stress. The transfer of the faecal virome protected against stress-associated behaviour sequelae, and restored stress-induced changes in select circulating immune cell populations, cytokine release, bacteriome alterations and gene expression in the amygdala. These data provide evidence that the virome plays a role in the modulation of the microbiota-gut-brain axis during stress, indicating that these viral populations should be considered when designing future microbiome-directed therapies. These are the R and Python scripts used to generate the sequencing data sets.
Distribution Amplitudes of Pseudoscalar Mesons
Creators: name: Braun, V. M.
name: Gockeler, M.
name: Horsley, R.
name: Perlt, H.
name: Pleiter, D.
name: Rakow, P. E. L.
name: Schierholz, G.
name: Schiller, A.
name: Schroers, W.
name: Stueben, H.
name: Zanotti, J. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present results for the first two moments of the distribution amplitudes of pseudoscalar mesons. Using two flavors of non-perturbatively improved clover fermions and non-perturbative renormalization of the matrix elements we perform both chiral and continuum extrapolations and compare with recent results from models and experiments.
description: 7 pages, 4 figures, based on presentation at Lattice 2006
Theory of magnetism in the van der Waals magnet CrI3
Creators: name: Jaeschke-Ubiergo, Rodrigo
name: Morell, Eric Suarez
name: Nunez, Alvaro Sebastian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the microscopical origin of anisotropic ferromagnetism in the van der Waals magnet CrI3. We conclude that the nearest neighbors exchange is well described by the Heisenberg-Kitaev-Gamma (HKGamma) model, and we also found a nonzero Dzyaloshinskii-Moriya interaction (DMI) on next nearest neighbors. Both Kitaev and DMI are known to generate a non-trivial topology of the magnons in the honeycomb lattice and have been used separately to describe the low energy regime of this material. We discuss that including one or the other leads to different signs of the Chern number. Furthermore, the topological gap at K-point seems to be mainly produced by DMI, despite it is one order of magnitude smaller than Kitaev. Finally, we show that by applying an external electric field perpendicular to the crystal plane, it is possible to induce DMI on nearest neighbors, and this could have consequences in non-collinear spin textures, such as domain walls and skyrmions.
description: Submitted to Physical Review B. 13 pages and 7 figures; Added references in section II.C
GEOMETRIC PROBLEMS ON TWO-DIMENSIONAL ARRAY PROCESSORS
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 10399 Numerical and Computational Mathematics not elsewhere classified
subject: FOS: Mathematics

description: Parallel algorithms for solving geometric problems on two array processor models--the mesh-connected computer (MCC) and a two-dimensional systolic array--are presented. We illustrate a recursive divide-and-conquer paradigm for MCC algorithms by presenting a time-optimal solution for the problem of finding the nearest neighbors of a set of planar points represented by their Cartesian coordinates. The algorithm executes on a √n x √n MCC, and requires an optimal O(√n) time. An algorithm for constructing the convex hull of a set of planar points and an update algorithm for the disk placement problem on an n2/3x n2/3 two dimensional systolic array are presented. Both these algorithms require O(n2/3) time steps. The advantage of the systolic solutions lies in their suitability for direct hardware implementation.
Figure S1 from Pausing to swarm: locust intermittent motion is instrumental for swarming-related visual processing
Creators: name: Aidan, Yossef
name: Bleichman, Itay
name: Ayali, Amir
Publisher: name: The Royal Society
Year: 2024
Subjects: classificationCode: 310901
subject: Animal behaviour
classificationCode: 520499
subject: Cognitive and computational psychology not elsewhere classified

description: Locust walking kinematics in three experimental conditions: continuously moving stimuli, in-phase, and out-of-phase (see Figure 1 for details). All experiments were conducted on the same insects (in random order). For the sake of simplicity, data shown are only those for stimuli moving in the opposite direction to the locust's heading, similarly on both screens. A. Walking fraction; B. Avg. pause duration.
Goldstone Bosons in Josephson Junctions
Creators: name: Dierckx, B.
name: Verbeure, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: For a microscopic model of a Josephson junction the normal coordinates of the two junction Goldstone bosons are constructed and their dynamical spectrum is computed. The explicit dependence on the phase difference of the two superconductors is calculated.
Feasibility and acceptability of ‘low-intensity mental health support via a telehealth-enabled network’ for adults with type 1 and type 2 diabetes: the LISTEN pilot study
Creators: name: Holloway, EE
name: Gray, S
name: Halliday, J
name: Harrap, B
name: Hines, C
name: Skinner, Timothy
name: Speight, J
name: Hendrieckx, C
Publisher: name: La Trobe
Year: 2024
Subjects: classificationCode: 4203
subject: Health services and systems

description: Background: This study examined the feasibility and acceptability of the low-intensity mental health support via telehealth-enabled network (LISTEN) intervention, for adults with diabetes, facilitated by diabetes health professionals (HPs). Methods: LISTEN training. Three HPs participated in three half-day online workshops and applied their learnings during training cases (maximum four). Competency was assessed with a validated tool and achieved ‘satisfactory’ ratings for three consecutive sessions. LISTEN pilot. A single-group, pre-post study (up to four LISTEN sessions) with online assessments at baseline, post-intervention, and 4-week follow-up. Eligible participants were adults with type 1 or type 2 diabetes, with diabetes distress, but excluded if they had moderate/severe depressive and/or anxiety symptoms. Feasibility was assessed via recruitment and session completion rates. Acceptability was assessed with post-intervention self-report data. Changes in diabetes distress and general emotional well-being from baseline (T1) were explored at post-intervention (T2) and at 4-week follow-up (T3). Results: Two HPs achieved competency (median training case sessions required: 7) and progressed to deliver LISTEN in the pilot study. In the pilot, N = 16 adults (Med [IQR] age: 60 [37–73] years; 13 women) with diabetes participated (median sessions per participant: 2). Twelve participants (75%) completed the post-intervention assessment (T2): 92% endorsed the number of sessions offered as ‘just right’, 75% felt comfortable talking with the HP, and 67% were satisfied with LISTEN. Perceived limitations were the structured format and narrow scope of problems addressed. Diabetes distress scores were lower post-intervention. Conclusions: This pilot demonstrates the feasibility of training HPs to deliver LISTEN, and the acceptability and potential benefits of LISTEN for adults with diabetes. The findings highlight adaptations that may enhance the delivery of, and satisfaction with, LISTEN that will be tested in a hybrid type 1 effectiveness-implementation trial.
MPEC 2024-T195 : 2024 TX5
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TX5

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
D-JIP2-4.1.1 Implemented database
Creators: name: Di Pasquale, Adriano
name: Caldarelli, Valentina
Publisher: name: Zenodo
Year: 2019
Subjects: OHEJP
COHESIVE
COHESIVE Information System
CIS
Workpackage 4
D-JIP2-4.1.1
D 4.1.1
Implemented database
IZSAM

description: Project JIP2 COHESIVE COHESIVE: One Health Structure In Europe
 Deliverable D-JIP2-4.1.1 Deliverable D-4.1.1 Workpackage 4 D 4.1.1 Implemented database D-JIP2-4.1.1 Implemented database COHESIVE Information System (CIS) (COHESIVE)
description: The initial code of this deliverable was D-4.1.1. Now the code is D-JIP2-4.1.
Rooted tree graphs and the Butcher group: Combinatorics of elementary perturbation theory
Creators: name: Faris, William G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C05, 16T30, 41A58 (Primary) 65L06, 81T15 (Secondary)

description: The perturbation expansion of the solution of a fixed point equation or of an ordinary differential equation may be expressed as a power series in the perturbation parameter. The terms in this series are indexed by rooted trees and depend on a parameter in the equation in a way determined by the structure of the tree. Power series of this form may be considered more generally; there are two interesting and useful group structures on these series, corresponding to operations of composition and substitution. The composition operation defines the Butcher group, an infinite dimensional group that was first introduced in the context of numerical analysis. This survey discusses various ways of realizing these rooted trees: as labeled rooted trees, or increasing labeled rooted trees, or unlabeled rooted trees. It is argued that the simplest framework is to use labeled rooted trees.
description: 32 pages with 12 figures, to appear in Festschrift for Charles M. Newman
title: Context Sensitive Design – Thinking Beyond the Pavement
title: Documentation of Workshop Development and Training
titleType: Subtitle
Creators: name: Pigman, Jerry G.
name: Hartman, Donald L.
name: Hopwood, Theodore
name: Agent, Kenneth R.
name: O'Connell, Lenahan
name: Stamatiadis, Nikiforos
name: Tyndall, Patrick
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2005
Subjects: subject: Transportation Engineering

description: This report documents the development and presentation of the workshop titled “Thinking Beyond the Pavement – A Workshop on Context Sensitive Design”. Work began on the workshop development in 1998 after the Kentucky Transportation Cabinet was selected as one of the pilot states to implement a training program for context sensitive design. The Kentucky Transportation Center at the University of Kentucky was selected to develop and deliver the training to state personnel and consultants who were commonly involved with project development. The training course was comprised of the following four modules:      Facilitated Communication and Public Involvement,     Environmental Issues,     Liability Issues, and     Design Guidelines, Safety, and Aesthetics.  A case study was prepared for use with the training modules in order to simulate the project development process and promote participant interaction. Through May 2004, there were 46 presentations of the workshop with 1,693 participants.
How extreme are the Wolf-Rayet clusters in NGC3125?
Creators: name: Hadfield, L J
name: Crowther, P A
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We reinvestigate the massive stellar content of NGC3125 (Tol3) using VLT/FORS1 imaging & spectroscopy, plus archival VLT/ISAAC, HST/FOC and HST/STIS datasets. Narrow-band imaging confirms that A and B knots represent the primary sites of Wolf-Rayet (WR) stars, whilst HST imaging reveals that both regions host multiple clusters. Clusters A1 + A2 within region A host WR stars. altough is not clear which cluster within region B hosts WR stars. Nebular properties infer an LMC-like metallicity. LMC template WN5-6 & WC4 spectra are matched to the observed optical WR bumps of A1 and B, permitting the contribution of WC stars to the blue bump to be quantified. We obtain N(WN5-6:WC4)=105:20, 55:0, 40:20 for clusters A1, A2 and B1+B2, a factor of 3 lower than optical studies, as a result of a lower E(B-V). Using Starburst99 models to estimate O star populations for individual clusters, we find N(WR)/N(O)=0.2 for A1 and 0.1 for A2 and B1+B2. From Halpha imaging, the O star content of the Giant HII regions A and B is found to be a factor of 5-10 times higher than that derived spectroscopically for the UV/optically bright clusters, suggesting that NGC3125 hosts optically obscured young massive clusters, further supported by VLT/ISAAC K band imaging. Archival HST/STIS UV spectroscopy confirms the low E(B-V) towards A1, for which we have determined an SMC extinction law, in preference to an LMC or starburst law. We obtain N(WN5-6)=110 from the slit-loss corrected HeII 1640 line flux, in excellent agreement with optical result. However, this is a factor of 35 times lower than that inferred from the same dataset by Chandar et al. due to their use of a starburst extinction law. Highly discrepant stellar populations may result in spatially resolved star forming regions from UV and optical studies through use of different extinction laws.
description: 12 pages, 8 figures, accepted for MNRAS (fixes previous error in Table 2)
Fluorides of silver under large compression
Creators: name: Kurzydłowski, Dominik
name: Derzsi, Mariana
name: Zurek, Eva
name: Grochala, Wojciech
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The silver-fluorine phase diagram has been scrutinized as a function of external pressure using theoretical methods. Our results indicate that two novel stoichiometries containing Ag+ and Ag2+ cations (Ag3F4 and Ag2F3) are thermodynamically stable at ambient and low pressure. Both are computed to be magnetic semiconductors at ambient pressure conditions. For Ag2F5, containing both Ag2+ and Ag3+, we find that strong 1D antiferromagnetic coupling is retained throughout the pressure-induced phase transition sequence up to 65 GPa. Our calculations show that throughout the entire pressure range of their stability the mixed valence fluorides preserve a finite band gap at the Fermi level. We also confirm the possibility of synthesizing AgF4 as a paramagnetic compound at high pressure. Our results indicate that this compound is metallic in its thermodynamic stability region. Finally, we present general considerations on the thermodynamic stability of mixed valence compounds of silver at high pressure.
Screening of point charge impurities in highly anisotropic metals: application to $μ^+$ spin relaxation in underdoped cuprates
Creators: name: Shekhter, Arkady
name: Shu, Lei
name: Aji, Vivek
name: MacLaughlin, D. E.
name: Varma, C. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We calculate the screening charge density distribution due to a point charge, such as that of a positive muon ($μ^+$), placed between the planes of a highly anisotropic layered metal. In underdoped hole cuprates the screening charge converts the charge density in the metallic-plane unit cells in the vicinity of the $μ^+$ to nearly its value in the insulating state. The current-loop ordered state observed by polarized neutron diffraction then vanishes in such cells, and also in nearby cells over a distance of order the intrinsic correlation length of the loop-ordered state. This in turn strongly suppresses the loop-current field at the $μ^+$ site. We estimate this suppressed field in underdoped YBa$_2$Cu$_3$O$_{6+x}$ and La$_{2-x}$Sr$_x$CuO$_4$, and find consistency with the observed 0.2--0.3 G field in the former case and the observed upper bound of $\sim$0.2 G in the latter case. This resolves the controversy between the neutron diffraction and $μ$SR experiments. The screening calculation also has relevance for the effect of other charge impurities in the cuprates, such as the dopants themselves.
Today’s DOT and the Quest for More Accountable Organizational Structures
Creators: name: O'Connell, Lenahan
name: Yusuf, Juita-Elena (Wie)
name: Hackbart, Merl
name: Hartman, Donald L.
name: Wallace, Candice
name: Kreis, Doug
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2005
Subjects: subject: Transportation Engineering

description: This study investigates the impact of DOT organizational structures on effective transportation planning and performance. A review of the 50 state DOT authorizing statutes and DOT organizational charts found minimal differences in organizational structures among the states. However, 37 states have quasi-independent commissions (sometimes called boards, or councils.) A statistical analysis showed that the commission states have higher Government Performance Project (GPP) scores than the non-commission states. The analysis suggested that effective commissions avoid having members represent geographical regions and political parties and avoid giving the commission the power to select the director of the DOT. In addition the states with effective DOTs staff their commissions with citizens, not politicians, and give the commission oversight authority, a policy formation role and a clear mission. In the second phase of the study, we conducted five case studies of high performing commission states to obtain best practices. The high performing states were found to institutionalize practices and rules to improve performance and accountability. These structured practices and rules were designed to do the following: (1) reduce political involvement in project selection; (2) hold statewide, regional and local meetings to increase transparency and trust; (3) empower their district offices to make decisions regarding system maintenance and preservation; (4) establish formal waste reduction techniques and processes; (5) allocate road fund resources on a consistent and objective basis; and (6)ensure sufficient funds are available to complete projects on time and on budget.
Fornet-Ponse, Thomas: Ökumene in drei Dimensionen
Creators: name: Koslowski, Jutta
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 62 Nr. 2 (2013): Ökumenische Rundschau, Band 62, Heft 2
Study of Pentaquark and $Λ(1405)$
Creators: name: Nemura, H.
name: Nakamoto, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We perform a five-body calculation for pentaquark $(q^4\bar{q})$ state of $Λ(1405)$ as well as the three-body calculations for the ground state baryons and the $Λ(1405)$, and two-body calculations for mesons. The hamiltonian, which reproduces reasonably well the energies of ground state baryons ($N,Λ,Σ,Ξ$ and $Δ$) and mesons ($π,K,ρ,K^\ast$), includes kinetic energy of semi-relativistic form, linear confinement potential, and the simplest form of color-magnetic interaction with Gaussian form factor. Flavor symmetry breaking ($m_s> m_{u,d}$) is taken into account. The energy calculated for $(q^4\bar{q})$ state of $Λ(1405)$ is lower than the energy for the $(q^3)$ state. The present result suggests that the $Λ(1405)$ is a pentaquark-dominated state if the color-magnetic potential plays a leading role of the quark-quark and quark-antiquark interactions.
description: talk given at Particles and Nuclei International Conference (PANIC05), Santa Fe, New Mexico, 24-28 Oct 2005
title: The adoption of the national programme for information technology in the NHS: the case of Lorenzo
Creators: name: Salloum, Adel Akram
Publisher: name: University of Kent
Year: 2021

description: This thesis is concerned with the aspect of Health Informatics that relates to IT adoption in the NHS. It focuses on the identification of the factors that influence significantly the implementation of LORENZO, the Electronic Health Record system that is being implemented in the Strategic Health Authorities (SHAs) in the North, Midlands, and East of England (NME) region as part of the National Programme for Information Technology (NPfIT) in the NHS. As a result of a review of the literature it was concluded that the study should be based on the underlying ideas of the Technology Acceptance Model (TAM). However, rather than the quantitative approach usually associated with the TAM, a qualitative research methodology was used to approach this area. The data was obtained by conducting face-to-face semi-structured interviews with people who represented the end users in the NHS and the designing company (the LSP). By contrast with most academic studies, the research, therefore, studied the NPfIT from the bottom up (i.e. the end user perspective). NVivo was used to aid the analysis of the interview data. This analysis was used to develop an extended TAM model and to suggest a theoretical model of the relationship between LORENZO development methodology and users' acceptance.
Incompressible topological solitons
Creators: name: Adam, C.
name: Naya, C.
name: Oles, K.
name: Romanczukiewicz, T.
name: Sanchez-Guillen, J.
name: Wereszczynski, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We discover a new class of topological solitons. These solitons can exist in a space of infinite volume like, e.g., $\mathbb{R}^n$, but they cannot be placed in any finite volume, because the resulting formal solutions have infinite energy. These objects are, therefore, interpreted as totally incompressible solitons. As a first, particular example we consider (1+1) dimensional kinks in theories with a nonstandard kinetic term or, equivalently, in models with the so-called runaway (or vacummless) potentials. But incompressible solitons exist also in higher dimensions. As specific examples in (3+1) dimensions we study Skyrmions in the dielectric extensions both of the minimal and the BPS Skyrme models. In the the latter case, the skyrmionic matter describes a completely incompressible topological perfect fluid.
description: reference added
Nanogaps with very large aspect ratios for electrical measurements
Creators: name: Fursina, A.
name: Lee, S.
name: Sofin, R. G. S.
name: Shvets, I. V.
name: Natelson, D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: For nanoscale electrical characterization and device fabrication it is often desirable to fabricate planar metal electrodes separated by large aspect ratio gaps with interelectrode distances well below 100 nm. We demonstrate a self-aligned process to accomplish this goal using a thin Cr film as a sacrificial etch layer. The resulting gaps can be as small as 10 nm and have aspect ratios exceeding 1000, with excellent interelectrode isolation. Such Ti/Au electrodes are demonstrated on Si substrates and are used to examine a voltage-driven transition in magnetite nanostructures. This shows the utility of this fabrication approach even with relatively reactive substrates.
description: 4 pages, 4 figures
Turbulence monitoring at Calern observatory with the Generalised Differential Image Motion Monitor
Creators: name: Aristidi, Eric
name: Fantéï-Caujolle, Yan
name: Ziad, Aziz
name: Chabé, Julien
name: Giordano, Christophe
name: Renaud, Catherine
name: Rafalimanana, Alohotsy
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Generalised Differential Image Motion Monitor (GDIMM) was proposed a few years ago as a new generation instrument for turbulence monitoring. It measures integrated parameters of the optical turbulence, i.e the seeing, isoplanatic angle, scintillation index, coherence time and wavefront coherence outer scale. GDIMM is based on a fully automatic small telescope (28cm diameter), equipped with a 3-holes mask at its entrance pupil. The instrument is installed at the Calern observatory (France) and performs continuous night-time monitoring of turbulence parameters. In this communication we present long-term and seasonnal statistics obtained at Calern, and combine GDIMM data to provide quantities such as the equivalent turbulence altitude and the effective wind speed.
description: SPIE Proceedings Volume 11448, Adaptive Optics Systems VII; 114484Z (2020) arXiv admin note: text overlap with arXiv:1904.07093
Complete noncommutativity in a cosmological model with radiation
Creators: name: Oliveira-Neto, G.
name: Marcon, L. Fazza
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In order to try explaining the present accelerated expansion of the universe, we consider the most complete noncommutativity, of a certain type, in a Friedmann-Robertson-Walker cosmological model, coupled to a perfect fluid. We use the ADM formalism in order to write the gravitational Hamiltonian of the model and the Schutz's formalism in order to write the perfect fluid Hamiltonian. The noncommutativity is introduced by four nontrivial Poisson brackets between all geometrical as well as matter variables of the model. Each nontrivial Poisson bracket is associated to a noncommutative parameter. We recover the description in terms of commutative variables by introducing four variables transformations that depend on the noncommutative parameters. Using those variables transformations, we rewrite the total noncommutative Hamiltonian of the model in terms of commutative variables. From the resulting Hamiltonian, we obtain the scale factor dynamical equations for a generic perfect fluid. In order to solve these equations, we restrict our attention to a model where the perfect fluid is radiation. The solutions depend on six parameters: the four noncommutative parameters, a parameter associated with the fluid energy $C$, and the curvature parameter $k$. They also depend on the initial conditions of the model variables. We compare the noncommutative solutions to the corresponding commutative ones and determine how the former ones differ from the latter ones. The comparison shows that the noncommutative model is very useful for describing the accelerated expansion of the universe. We also obtain estimates for one of the noncommutative parameters.
description: The paper has 35 pages and 14 figures
3D Primitives Gpgpu Generation for Volume Visualization in 3D Graphics Systems
Creators: name: Al-Oraiqat, Anas M.
name: Zori, Sergii A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: This article discusses the study of 3D graphic volume primitive computer system generation (3D segments) based on General Purpose Graphics Processing Unit (GPGPU) technology for 3D volume visualization systems. It is based on the general method of Volume 3D primitive generation and an algorithm for the voxelization of 3D lines, previously proposed and studied by the authors. We considered the Compute Unified Device Architect (CUDA) implementation of a parametric method for generating 3D line segments and characteristics of generation on modern Graphics Processing Units. Experiments on the test bench showed the relative inefficiency of generating a single 3D line segment and the efficiency of generating both fixed and arbitrary length of 3D segments on a Graphics Processing Unit (GPU). Experimental studies have proven the effectiveness and the quality of produced solutions by our method, when compared to existing state-of-the-art approaches.
description: 12 pages, 9 figures
A "blue ring nebula" surrounding a thousands of years old stellar merger
Creators: name: Hoadley, Keri
name: Martin, Christopher
name: Metzger, Brian D.
name: Seibert, Mark
name: McWilliam, Andrew
name: Shen, Ken J.
name: Neill, James D.
name: Stefansson, Gudmundur
name: Monson, Andrew
name: Schaefer, Bradley E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Stellar mergers are a brief-lived but common phase in the evolution of binary star systems. Among the many astrophysical implications of these events include the creation of atypical stars (e.g. magnetic stars, blue stragglers, rapid rotators), interpretation of stellar populations, and formation channels of LIGO-detected compact object mergers. Although stellar mergers are thus commonly invoked phenomena, observations of these events and details of their evolution remain elusive. While a handful of stellar mergers have been directly observed in recent years, the central remnants of these events remain shrouded by an opaque shell of dust and molecules, making it impossible to observe their final state (e.g. as a single merged star or a tighter surviving binary). Here we report observations of an unusual, ring-shaped ultraviolet nebula and the star at its center, TYC 2597-735-1. The nebula shows two opposing fronts, suggesting a bipolar outflow from TYC 2597-735-1. TYC 2597-735-1's spectrum and proximity above the Galactic plane suggest it is an old star, yet it shows abnormally low surface gravity and a detectable long-term luminosity decay, uncharacteristic for its evolutionary stage. TYC 2597-735-1 also exhibits H-alpha emission, radial velocity variations, enhanced ultraviolet radiation, and excess infrared emission, common signposts of dusty circumstellar disks, stellar activity, and accretion. The combined observations, paired with stellar evolution models, suggests TYC 2597-735-1 merged with a lower-mass companion several thousand years ago. TYC 2597-735-1 provides a look at an unobstructed stellar merger found at an evolutionary stage between its dynamic onset and the theorized final equilibrium state, directly inferring how two stars merge into a single star.
description: 25 pages (Main article), 3 Figures and 8 Extended Data Figures, SI (57 pages) included after Extended Data Figures. To appear in Nov 19 publication of Nature. Online release URL (Nov 18): https://www.nature.com/articles/s41586-020-2893-5
Photonic Chern insulators from two-dimensional atomic lattices interacting with a single surface plasmon polariton
Creators: name: Rituraj
name: Orenstein, Meir
name: Fan, Shanhui
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the polaritonic bandstructure of two-dimensional atomic lattices coupled to a single excitation of a surface plasmon polariton mode. We show the possibility of realizing topological gaps with different Chern numbers by having resonant atomic transitions to excited states with different angular momentum. We employ a computational method based on the recently proposed Dirichlet-to-Neumann (DtN) map technique which accurately models non-Markovian dynamics as well as interactions involving higher-order electric and magnetic multipole transitions. We design topologically robust edge states which are used to achieve unidirectional emission and non-reciprocal transmission of single photons. We also point out the challenges in realizing bands with higher Chern numbers in such systems.
3D Pseudo Stereo Visualization with Gpgpu Support
Creators: name: Al-Oraiqat, Anas M.
name: Zori, Sergii A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: This article discusses the study of a computer system for creating 3D pseudo-stereo images and videos using hardware and software support for accelerating a synthesis process based on General Purpose Graphics Processing Unit (GPGPU) technology. Based on the general strategy of 3D pseudo-stereo synthesis previously proposed by the authors, Compute Unified Device Architect (CUDA) method considers the main implementation stages of 3D pseudo-stereo synthesis: (i) the practical implementation study; (ii) the synthesis characteristics for obtaining images; (iii) the video in Ultra-High Definition (UHD) 4K resolution using the Graphics Processing Unit (GPU). Respectively with these results of 4K content test on evaluation systems with a GPU the acceleration average of 60.6 and 6.9 times is obtained for images and videos. The research results show consistency with previously identified forecasts for processing 4K image frames. They are confirming the possibility of synthesizing 3D pseudo-stereo algorithms in real time using powerful support for modern Graphics Processing Unit/Graphics Processing Clusters (GPU/GPC).
description: 14 pages, 8 figures
Deeper understanding through dance
Creators: name: Dionne, Claude
Publisher: name: University of British Columbia
Year: 2009

description: This study concerns dance as a Fine. Arts subject in a junior high school French Immersion program. It focuses on two semesters involving grades 8, 9, and 10, and examines the quality of students' work with reference to the practicalities of the British Columbia K-12 Dance Curriculum, and the ideas of "deeper understanding", as defined by Howard Gardner (1991). Assessment of the quality and range, of students' work focuses on the categories of Production, Reflection, Perception and Approach to Work. These were drawn from the project known as Arts Propel initiated by Howard Gardner. Students' various "competencies" are examined through in depth interviews, video taping and field notes, as well as direct observations of students' work. The role of a knowledgeable external observer is acknowledged. Analysis of the findings suggest that dance may be a natural vehicle for this quality of deeper understanding but in this particular case such learning depended upon an emphasis on original dance composition performed within group contexts.
title: Die theoriegeleitete Erfassung früher naturwissenschaftlicher (Leistungs-)Potenziale im Übergangsprozess von der Kita in die Grundschule aus Perspektive einer inklusiven Begabungsförderung.
Creators: name: Müller, Freya
name: Mehrtens, Tobias
name: Köster, Hilde
Publisher: name: Universität Graz
Year: 2021

description: Der Beitrag befasst sich mit dem frühen Erkennen naturwissenschaftlicher (Begabungs-) Potenziale im Übergangsprozess von der Kita in die Grundschule. Hierfür wird ein multiperspektivisches, theoriebasiertes Modell zur Beschreibung vorgestellt. Darüber hinaus wird die Konzeption zweier, dem Ansatz des Design-Based Research (DBR) folgenden Forschungsprojekte präsentiert. Das Ziel der Forschungsvorhaben besteht darin, mithilfe der aus dem Modell abgeleiteten Indikatoren Instrumente zur Bildungsdokumentationen von frühen Potenzialen für beide Bereiche zu entwickeln und zu evaluieren. Im Ausblick kommt es zur kurzen Darstellung des aktuellen Entwicklungsstands beider Instrumente sowie zur Limitation und Diskussion des Forschungsvorhabens.
description: Schlüsselwörter: frühe naturwissenschaftliche Begabung, Übergangsprozess, inklusive Begabungsförderung, Bildungsdokumentation, Diagnostiktool, DBR (Design-Based-Research)
description: The article deals with the early recognition of scientific (giftedness) potentials in the transition process from kindergarten to elementary school. For this purpose, a multi-perspective, theory-based model for description is presented. Furthermore, the conception of two research projects following the Design-based research (DBR) approach will be presented. The aim of the research projects is to use the indicators derived from the model to develop and evaluate instruments for the educational documentation of early potentials for both areas. In the outlook, the current state of development of both instruments is briefly presented and the research project is limited and discussed.
description: Keywords: early science giftness, transition process, inclusive gifted education, educational documentation, diagnostic tool, DBR (design-based-research)
description: ElFo – Elementarpädagogische Forschungsbeiträge (2021), 3 (2), S. 18-31
Towards mmWave V2X in 5G and Beyond to Support Automated Driving
Creators: name: Sakaguchi, Kei
name: Fukatsu, Ryuichi
name: Yu, Tao
name: Fukuda, Eisuke
name: Mahler, Kim
name: Heath, Robert
name: Fujii, Takeo
name: Takahashi, Kazuaki
name: Khoryaev, Alexey
name: Nagata, Satoshi
name: Shimizu, Takayuki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Millimeter wave provides high data rates for Vehicle-to-Everything (V2X) communications. This paper motivates millimeter wave to support automated driving and begins by explaining V2X use cases that support automated driving with references to several standardi-zation bodies. The paper gives a classification of existing V2X stand-ards: IEEE802.11p and LTE V2X, along with the status of their com-mercial deployment. Then, the paper provides a detailed assessment on how millimeter wave V2X enables the use case of cooperative perception. The explanations provide detailed rate calculations for this use case and show that millimeter wave is the only technology able to achieve the requirements. Furthermore, specific challenges related to millimeter wave for V2X are described, including cover-age enhancement and beam alignment. The paper concludes with some results from three studies, i.e. IEEE802.11ad (WiGig) based V2X, extension of 5G NR (New Radio) toward mmWave V2X, and prototypes of intelligent street with mmWave V2X.
Bose-Einstein Condensation of Confined and Non-interacting Bose Particles by the Integral Representation of Bose Functions
Creators: name: Kim, Sang-Hoon
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: With the integral representation of Bose functions, the Bose-Einstein condensation of non-interacting bosons in a three-dimensional harmonic trap was studied. The relation between the particle number and its phase transition temperature was clarified. Some next-order terms in the thermodynamic expansions were obtained. We plotted the chemical potential, the mean energy, and the specific heat and found most of these properties obtained by using the integral representation were almost identical with those of the series representation of Bose functions.
description: 7 pages, 5 figures
The TESS-Keck Survey IV: A Retrograde, Polar Orbit for the Ultra-Low-Density, Hot Super-Neptune WASP-107b
Creators: name: Rubenzahl, Ryan A.
name: Dai, Fei
name: Howard, Andrew W.
name: Chontos, Ashley
name: Giacalone, Steven
name: Lubin, Jack
name: Rosenthal, Lee J.
name: Isaacson, Howard
name: Batalha, Natalie M.
name: Crossfield, Ian J. M.
name: Dressing, Courtney
name: Fulton, Benjamin
name: Huber, Daniel
name: Kane, Stephen R.
name: Petigura, Erik A
name: Robertson, Paul
name: Roy, Arpita
name: Weiss, Lauren M.
name: Beard, Corey
name: Hill, Michelle L.
name: Mayo, Andrew
name: Močnik, Teo
name: Murphy, Joseph M. Akana
name: Scarsdale, Nicholas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We measured the Rossiter-McLaughlin effect of WASP-107b during a single transit with Keck/HIRES. We found the sky-projected inclination of WASP-107b's orbit, relative to its host star's rotation axis, to be $|λ| = {118}^{+38}_{-19}$ degrees. This confirms the misaligned/polar orbit that was previously suggested from spot-crossing events and adds WASP-107b to the growing population of hot Neptunes in polar orbits around cool stars. WASP-107b is also the fourth such planet to have a known distant planetary companion. We examined several dynamical pathways by which this companion could have induced such an obliquity in WASP-107b. We find that nodal precession and disk dispersal-driven tilting can both explain the current orbital geometry while Kozai-Lidov cycles are suppressed by general relativity. While each hypothesis requires a mutual inclination between the two planets, nodal precession requires a much larger angle which for WASP-107 is on the threshold of detectability with future Gaia astrometric data. As nodal precession has no stellar type dependence, but disk dispersal-driven tilting does, distinguishing between these two models is best done on the population level. Finding and characterizing more extrasolar systems like WASP-107 will additionally help distinguish whether the distribution of hot-Neptune obliquities is a dichotomy of aligned and polar orbits or if we are uniformly sampling obliquities during nodal precession cycles.
description: 13 pages, 6 figures, to be published in The Astronomical Journal
Extrasolar planets and brown dwarfs around A-F type stars. IV. A candidate brown dwarf around the A9V pulsating star HD180777
Creators: name: Galland, F.
name: Lagrange, A. M.
name: Udry, S.
name: Beuzit, J. L.
name: Pepe, F.
name: Mayor, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present here the detection of a brown dwarf orbiting the A9V star HD180777. The radial velocity measurements, obtained with the ELODIE echelle spectrograph at the Haute-Provence Observatory, show a main variation with a period of 28.4 days. Assuming a primary mass of 1.7 Mo, the best Keplerian fit to the data leads to a minimum mass of 25 MJup for the companion (the true mass could be significantly higher). We also show that, after substraction of the Keplerian solution from the radial velocity measurements, the residual radial velocities are related to phenomena intrinsic to the star, namely pulsations with typical periods of Gamma Dor stars. These results show that in some cases, it is possible to disentangle radial velocity variations due to a low mass companion from variations intrinsic to the observed star.
description: 7 pages, final version, accepted for publication (A&A)
Spirostomum ambiguum
Creators: name: Durán-Ramírez, Carlos Alberto
name: Dias, Roberto Júnio Pedroso
name: Estrada, Rosaura Mayén-
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Chromista
Ciliophora
Heterotrichea
Heterotrichida
Spirostomidae
Spirostomum
Spirostomum ambiguum

description: Spirostomum ambiguum 2 (Müller, 1786) Ehrenberg, 1835
Distribution. JAMAICA: (Dunthorn et al. 2012).
description: Published as part of Durán-Ramírez, Carlos Alberto, Dias, Roberto Júnio Pedroso & Estrada, Rosaura Mayén-, 2020, Checklist of ciliates (Alveolata: Ciliophora) that inhabit in bromeliads from the Neotropical Region, pp. 1-36 in Zootaxa 4895 (1) on page 8, DOI: 10.11646/zootaxa.4895.1.1, http://zenodo.org/record/4321437
title: Kategorisierung der Dinge des pädagogischen Alltags. Interaktionsorientierte Benennung unbelebter Akteure
Creators: name: Albeyhll, Laura von
Publisher: name: Universität Graz
Year: 2021

description: Seit dem „material turn“ (Cloos, Bensel, Haug-Schnabel, Wadepohl & Weltzien, 2018) der Erziehungswissenschaft wenden sich Forschungsvorhaben vermehrt der Rolle der Dinge zu. Wie konkret die Dinge in Interaktionen als Akteure auftreten, beeinflusst und lenkt den Verlauf von pädagogischen Situationen (u. a. Nohl, 2011; Stieve, 2008). Der vorliegende Beitrag setzt den Fokus auf die Kategorisierung der Dinge in frühpädagogischen Settings. Dargestellt wird ein Kategorisierungssystem, das auf Basis videografierter Situationen des frühpädagogischen Alltags entstanden ist. Dabei werden die Benennungen praxistheoretisch orientiert von den menschlichen Akteur:innen ausgedacht, mit denen die Dinge in ein beobachtbares Handlungsnetzwerk eingebunden sind (Gertenbach & Laux, 2019).
description: Schlüsselwörter: Akteur-Netzwerk-Theorie, Dinge, Interaktion, Kategorisierung, Frühpädagogik
description: Since the „material turn“ (Cloos, Bensel, Haug-Schnabel, Wadepohl & Weltzien, 2018) in educational science, research projects have increasingly turned to the role of things. How concretely things act as actors in interactions, influences and directs the course of pedagogical situations (amongst others: Nohl, 2011; Stieve, 2008). This paper focuses on categorizing things in early education settings. A categorization system is presented, which was developed based on videographed situations of everyday life in kindergartens. In this context, the category labels are conceived in a practical theory-oriented way from the human actors with whom things are integrated into an observable action-network (Gertenbach & Laux, 2019).
description: Keywords: Actor-Network-Theory, things, interaction, categorisation, early childhood education
description: ElFo – Elementarpädagogische Forschungsbeiträge (2021), 3 (2), S. 7-17
Anisotropic s-wave superconductivity in single crystals CaAlSi from penetration depth measurements
Creators: name: Prozorov, Ruslan
name: Olheiser, Tyson A.
name: Giannetta, Russell W.
name: Uozato, Kentaro
name: Tamegai, Tsuyoshi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In- and out-of-plane London penetration depths were measured in single crystals CaAlSi (T_{c}=6.2 K and 7.3 K) using a tunnel-diode resonator. A full 3D BCS analysis of the superfluid density is consistent with a prolate spheroidal gap, with a weak-coupling BCS value in the ab-plane and stronger coupling along the c-axis. The gap anisotropy was found to significantly decrease for higher T_{c} samples.
description: 4 pages
Virial theorem for four-dimensional supersymmetric Yang-Mills quantum mechanics with SU(2) gauge group
Creators: name: Kotanski, Jan
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Supersymmetric Yang-Mills quantum mechanics (SYMQM) in four dimensions for SU(2) gauge group is considered. In this work a two-fermionic sector with the angular momentum j=0 in discussed. Energy levels from discrete and continuous spectra are calculated. To distinguish localized states from non-localized ones the virial theorem is applied.
description: Presented at the Cracow School of Theoretical Physics, Zakopane 2006, 9 pages, 4 figures