cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Strain induced variations in transport and optical properties of SrVO$_3$: a DFT+U study
Creators: name: Biswas, Maitreyo
name: Misra, Debolina
name: Kundu, Tarun K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: First-principles calculations based on density functional theory + Hubbard U (DFT+U) approach have been carried out to study the strain induced variations in the optical and transport properties of the correlated perovskite SrVO$_3$. By virtue of its conductivity, high carrier mobility and optical transparency, SrVO$_3$ can be used as a potential replacement of indium tin oxide (ITO) as a transparent conductor. As strain tuning is an effective way to tune the electron-electron correlations in correlated oxides, the epitaxial strain induced variations in V-3d bandwidth, band center shift and band splitting at high symmetry points ($Γ$, R) in SrVO$_3$ are investigated. The alterations in resistivity, carrier concentration, Hall coefficient and plasma frequency with applied strain are also elucidated. Our calculations revealed that under tensile strain, the lifting of the threefold degeneracy of 3d-t$_{2g}$ orbital and d-band narrowing reinforces a relatively less conducting state thus limiting the $ω_P$ to lower frequencies. On the contrary, in case of compressive strain the d-band widening predominates leading to an increase in carrier concentration and decrease in resistivity enhancing the metallic state. As a result, $ω_P$ is increased to higher frequencies which decreases the optical transparency window. Hence, our results and findings clearly demonstrate the interdependence between the optical and transport properties, and provides a detailed mechanism to tune the optoelectronic properties of SrVO$_3$ for its applications as a transparent conducting oxide.
Dirac gauge theory for topological spinors in 3+1 dimensional networks
Creators: name: Bianconi, Ginestra
Publisher: name: arXiv
Year: 2022
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Lattice (hep-lat)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Gauge theories on graphs and networks are attracting increasing attention not only as approaches to quantum gravity but also as models for performing quantum computation. Here we propose a Dirac gauge theory for topological spinors in $3+1$ dimensional networks associated to an arbitrary metric. Topological spinors are the direct sum of $0$-cochains and $1$-cochains defined on a network and describe a matter field defined on both nodes and links of a network. Recently in Ref. \cite{bianconi2021topological} it has been shown that topological spinors obey the topological Dirac equation driven by the discrete Dirac operator. In this work we extend these results by formulating the Dirac equation on weighted and directed $3+1$ dimensional networks which allow for the treatment of a local theory. The commutators and anti-commutators of the Dirac operators are non vanishing an they define the curvature tensor and magnetic field of our theory respectively. This interpretation is confirmed by the non-relativistic limit of the proposed Dirac equation. In the non-relativistic limit of the proposed Dirac equation the sector of the spinor defined on links follows the Schrödinger equation with the correct giromagnetic moment, while the sector of the spinor defined on nodes follows the Klein-Gordon equation and is not negligible. The action associated to the proposed field theory comprises of a Dirac action and a metric action. We describe the gauge invariance of the action under both Abelian and non-Abelian transformations and we propose the equation of motion of the field theory of both Dirac and metric fields. This theory can be interpreted as a limiting case of a more general gauge theory valid on any arbitrary network in the limit of almost flat spaces.
description: 26 pages
Survey and analysis of writing interests of grade five students
Creators: name: Bullivant, Gordon Moores
Publisher: name: University of Calgary
Year: 1972
Subjects: subject: PN 171 C5 B79 1972 Microfilm
subject: Children as authors
subject: English language - Study and teaching (Elementary)
subject: Writing - Study and teaching
subject: Grade Five students

description: Bibliography: p. 76-86.
The Wiener Property for a Class of Fourier Integral Operators
Creators: name: Cordero, Elena
name: Gröchenig, Karlheinz
name: Nicola, Fabio
name: Rodino, Luigi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Functional Analysis (math.FA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35S30, 47G30, 42C15

description: We construct a one-parameter family of algebras consisting of Fourier integral operators. We derive boundedness results, composition rules, and the spectral invariance of this class of operators. The operator algebra is defined by the decay properties of an associated Gabor matrix around the graph of the canonical transformation.
description: 19 pages
General covariant xp models and the Riemann zeros
Creators: name: Sierra, German
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Number Theory (math.NT)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study a general class of models whose classical Hamiltonians are given by H = U(x) p + V(x)/p, where x and p are the position and momentum of a particle moving in one dimension, and U and V are positive functions. This class includes the Hamiltonians H_I =x (p+1/p) and H_II=(x+ 1/x)(p+ 1/p), which have been recently discussed in connection with the non trivial zeros of the Riemann zeta function. We show that all these models are covariant under general coordinate transformations. This remarkable property becomes explicit in the Lagrangian formulation which describes a relativistic particle moving in a 1+1 dimensional spacetime whose metric is constructed from the functions U and V. General covariance is maintained by quantization and we find that the spectra are closely related to the geometry of the associated spacetimes. In particular, the Hamiltonian H_I corresponds to a flat spacetime, whereas its spectrum approaches the Riemann zeros in average. The latter property also holds for the model H_II, whose underlying spacetime is asymptotically flat. These results suggest the existence of a Hamiltonian whose underlying spacetime encodes the prime numbers, and whose spectrum provides the Riemann zeros.
description: 34 pages, 3 figures
Hybrid stars within the framework of the Sigma-Omega-Rho model combined with the MIT and NJL models
Creators: name: Karimi, Reza
name: Moshfegh, H. R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we investigate the structure of hybrid stars consisting of hadrons (neutrons, protons, sigmas, lambdas), leptons (electrons, muons), and quarks (up, down, strange). We use a relativistic mean-field (RMF) model namely the Sigma-omega-rho model for the hadronic phase and the MIT bag model as well as the NJL model for the quark phase. In addition, Maxwell and Gibbs conditions are employed to investigate the hadron-Quark phase transition. Finally, by obtaining the mass-radius relation, $ M (M_{sun}) \leqslant 2.07 $ is predicted for such hybrid stars.
description: 23 pages, 10 figures
Synthetic dust polarization emission maps at 353 GHz for an observer placed inside a Local Bubble-like cavity
Creators: name: Maconi, E.
name: Soler, J. D.
name: Reissl, S.
name: Girichidis, P.
name: Klessen, R. S.
name: Hennebelle, P.
name: Molinari, S.
name: Testi, L.
name: Smith, R. J.
name: Sormani, M. C.
name: Teh, J. W.
name: Traficante, A.
name: .
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a study of synthetic observations of polarized dust emission at 353 GHz as seen by an observer within a cavity in the interstellar medium (ISM). The cavity is selected from a magnetohydrodynamic simulation of the local ISM with time-dependent chemistry, star formation, and stellar feedback in form of supernova explosions with physical properties comparable to the Local Bubble ones. We find that the local density enhancement together with the coherent magnetic field in the cavity walls makes the selected candidate a translucent polarization filter to the emission coming from beyond its domains. This underlines the importance of studying the Local Bubble in further detail. The magnetic field lines inferred from synthetic dust polarization data are qualitatively in agreement with the all-sky maps of polarized emission at 353 GHz from the Planck satellite in the latitudes interval 15deg <= |b| <= 65deg. As our numerical simulation allows us to track the Galactic midplane only out to distances of 250 pc, we exclude the region |b|<15deg from our analysis. At large Galactic latitudes, our model exhibits a high degree of small-scale structures. On the contrary, the observed polarization pattern around the Galactic poles is relatively coherent and regular, and we argue that the global toroidal magnetic field of the Milky Way is important for explaining the data at |b| > 65deg. We show that from our synthetic polarization maps, it is difficult to distinguish between an open and a closed Galactic cap using the inferred magnetic field morphology alone.
Analysis of poetry teaching practices in grade five
Creators: name: De Vlaming, Rhoda Jane
Publisher: name: University of Calgary
Year: 1975
Subjects: subject: PN 1101 V58 1975 Microfiche
subject: Poetry - Study and teaching
subject: Language Arts (Elementary)
subject: Creative writing (Elementary education)
subject: Grade Five students

description: Bibliography: p. 149-159.
Lepton number violating four-body tau lepton decays
Creators: name: Castro, Gabriel Lopez
name: Quintero, Nestor
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the four-body tau^+- -> nu_tau l^+- l^+- X^-+ decays where l=e or mu and X=pi, K, rho and K^* mesons. These decay processes violate the total lepton number (|Delta L|=2) and can be induced by the exchange of Majorana neutrinos. We consider an scenario where these decays are dominated by the exchange of only one heavy neutrino which produces an enhancement of the decay amplitude via the resonant mechanism. Searches for these novel decay channels with branching fractions sensitivities of (10^-7) can provide constraints on the parameter space of the Majorana neutrinos which are stronger than the ones obtained from Delta L=2 decays of charged pseudoscalar mesons.
description: REVTeX, 14 pages, 6 figures, four references added. Version accepted for publication in PRD
Kondo effect near the Van Hove singularity in biased bilayer graphene
Creators: name: Lipinski, S.
name: Krychowski, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Magnetic impurity adsorbed on one of the carbon planes of a bilayer graphene is studied. The formation of the many-body SU(2) and SU(4) resonances close to the bandgap is analyzed within the mean field Kotliar-Ruckenstein slave boson approach. Impact of enhanced hybridization and magnetic instability of bilayer doped near the Van Hove singularity on the screening of magnetic moment is discussed.
description: 10 pages, 8 figures
Transition from inspiral to plunge for braneworld EMRI
Creators: name: Mukherjee, Sajal
name: Chakraborty, Sumanta
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the present article, we discuss the late inspiral and then the transition regime to the plunge phase of a secondary, less massive compact object into a more massive braneworld black hole, in the context of an extreme-mass-ratio inspiral. We obtain the approximate expressions for fluxes due to slowly evolving constants of motion, such as the energy and the angular momentum, in the presence of the tidal charge inherited from the higher spacetime dimensions for an extreme-mass-ratio system. These expressions for fluxes are further used to introduce dissipative effects while modeling the inspiral to the plunge phase through the transition regime. Within our setup, we provide a qualitative understanding of how the additional tidal charge present in the braneworld scenario may affect the timescale of the late inspiral to the plunge, in particular, by enhancing the time scale of the transition regime. Finally, we provide an estimate for the tidal charge from the higher dimensions, using the observable aspects of the transition regime from the late inspiral to the plunge by the gravitational wave detectors.
description: 22 pages, 2 figures
Energy Content of Colliding Plane Waves using Approximate Noether Symmetries
Creators: name: Sharif, M.
name: Waheed, Saira
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper is devoted to study the energy content of colliding plane waves using approximate Noether symmetries. For this purpose, we use approximate Lie symmetry method of Lagrangian for differential equations. We formulate the first-order perturbed Lagrangian for colliding plane electromagnetic and gravitational waves. It is shown that in both cases, there does not exist
description: 18 pages, accepted for publication in Brazilian J Physics
Strongly-interacting Fermi gases with population imbalance
Creators: name: Ku, Mark
Publisher: name: University of British Columbia
Year: 2009

description: This thesis presents a theoretical study of strongly-interacting Fermi systems with population imbalance, which is motivated by some differences in cold atoms experiments. We calculate the energy of a single fermion interacting resonantly with a Fermi sea of different species fermions in anisotropic traps, and show that finite particle numbers and the trap geometry impact the phase structure and the critical polarization, the limit of resonance superfluidity in traps. Our findings contribute to understanding some experimental discrepancies as finite-size and confinement effects. For an imbalanced gas in the uniform system, we calculate the energy of adding an impurity, and construct the equation of state of the partially-polarized normal Fermi liquid. Finally, we study the properties of a spin-down polaron in a trapped gas containing arbitrary numbers of spin-up and spin-down fermions, and derive a self-consistent equation for the polaron energy.
Electronic transport mechanisms in a thin crystal of the Kitaev candidate $α$-RuCl$_3$ probed through guarded high impedance measurements
Creators: name: Barfield, Patrick
name: Tran, Vinh
name: Nagarajan, Vikram
name: Martinez, Maya
name: Diego, Amirari
name: Bergner, Derek
name: Lanzara, Alessandra
name: Analytis, James G.
name: Ojeda-Aristizabal, Claudia
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: $α$-RuCl$_3$ is considered to be the top candidate material for the experimental realization of the celebrated Kitaev model. It is however known that additional interactions beyond the Kitaev model trigger in $α$-RuCl$_3$, a long-range zigzag antiferromagnetic ground state. In this work, we investigate a nanoflake of $α$-RuCl$_3$ through guarded high impedance measurements aimed at reaching through electronic transport, the regime where the system turns into a zigzag antiferromagnet. We investigated a variety of temperatures (\SI{1.45}{\kelvin} - \SI{175}{\kelvin}) and out-of-plane magnetic fields ranging up to \SI{11}{\tesla}. We found a clear signature of a structural phase transition at $\approx 160$\,K as reported for thin crystals of $α$-RuCl$_3$, as well as a thermally activated behavior at temperatures above $\approx 30$\,K with a characteristic activation energy significantly smaller than the energy gap that we observe for $α$-RuCl$_3$ bulk crystals through our Angle Resolved Photoemission Spectroscopy (ARPES) experiments. Additionally we found that below $\approx 30$\,K, transport is ruled by Efros-Shklovskii (ES) VRH. These observations point to the presence of Coulomb impurities in our thin crystals. Most importantly, our data shows that below the magnetic ordering transition known for bulk $α$-RuCl$_3$ ($\approx 7$\,K), there is a clear deviation from VRH or thermal activation transport mechanisms. Our work demonstrates the possibility of reaching through specialized high impedance measurements, the thrilling ground states predicted for $α$-RuCl$_3$ at low temperatures in the frame of the Kitaev model, and informs about the transport mechanisms in this material in a wide temperature range as well as on important characteristic quantities such as the localization length of the impurities in a thin $α$-RuCl$_3$ crystal.
description: 8 pages, 6 figures, Supplementary Materials
Scoping and narrative review protocol: Influence of emulsion structure on physiology and health
Creators: name: Dassoff, Erik Scott
name: Wright, Amanda
name: Shireen, Arshia
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Life Sciences
subject: Dietetics and Clinical Nutrition
subject: Physiology
subject: FOS: Biological sciences
subject: Food Science
subject: Medicine and Health Sciences
subject: Nutrition
subject: Emulsion Structure
subject: Digestion
subject: Food Matrix
subject: Lipids
subject: Food Structure
subject: Physiology
subject: Health
subject: Emulsion

description: This protocol describes reproducible procedures for conducting a scoping review on the influence of emulsion structure on physiology and health. In addition, it considers the potential for a narrative structure to discuss novel mechanisms which may not be covered within the scope of existing food science literature.
On the invariant causal characterization of singularities in spherically symmetric spacetimes
Creators: name: Fayos, Francesc
name: Torres, Ramon
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The causal character of singularities is often studied in relation to the existence of naked singularities and the subsequent possible violation of the cosmic censorship conjecture. Generally one constructs a model in the framework of General Relativity described in some specific coordinates and finds an ad hoc procedure to analyze the character of the singularity. In this article we show that the causal character of the zero-areal-radius (R=0) singularity in spherically symmetric models is related with some specific invariants. In this way, if some assumptions are satisfied, one can ascertain the causal character of the singularity algorithmically through the computation of these invariants and, therefore, independently of the coordinates used in the model.
description: A misprint corrected in Theor. 4.1 /Cor. 4.1
Probing the energy-smeared R-ratio on the lattice
Creators: name: Alexandrou, Constantia
name: Bacchio, Simone
name: De Santis, Alessandro
name: Dimopoulos, Petros
name: Finkenrath, Jacob
name: Frezzotti, Roberto
name: Gagliardi, Giuseppe
name: Garofalo, Marco
name: Hadjiyiannakou, Kyriakos
name: Kostrzewa, Bartosz
name: Jansen, Karl
name: Lubicz, Vittorio
name: Petschlies, Marcus
name: Sanfilippo, Francesco
name: Simula, Silvano
name: Tantalo, Nazario
name: Urbach, Carsten
name: Wenger, Urs
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a first-principles lattice QCD investigation of the $R$-ratio between the $e^+e^-$ cross-section into hadrons and that into muons. By using the method of Ref.[1], that allows to extract smeared spectral densities from Euclidean correlators, we compute the $R$-ratio convoluted with Gaussian smearing kernels of widths of about $600$ MeV and central energies from $220$ MeV up to $2.5$ GeV. Our theoretical results are compared with the corresponding quantities obtained by smearing the KNT19 compilation [2] of $R$-ratio experimental measurements with the same kernels and, by centring the Gaussians in the region around the $ρ$-resonance peak, a tension of about three standard deviations is observed. From the phenomenological perspective, we have not included yet in our calculation QED and strong isospin-breaking corrections and this might affect the observed tension. From the methodological perspective, our calculation demonstrates that it is possible to study the $R$-ratio in Gaussian energy bins on the lattice at the level of accuracy required in order to perform precision tests of the Standard Model.
description: Version accepted for publication on PRL. Results unchanged
The cosmic web in Lyman-alpha emission
Creators: name: Byrohl, Chris
name: Nelson, Dylan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We develop a comprehensive theoretical model for Lyman-alpha emission, from the scale of individual Lyman-alpha emitters (LAEs) to Lyman-alpha halos (LAHs), Lyman-alpha blobs (LABs), and Lyman-alpha filaments (LAFs) of the diffuse cosmic web itself. To do so, we post-process the high-resolution TNG50 cosmological magnetohydrodynamical simulation with a Monte Carlo radiative transfer method to capture the resonant scattering process of Lyman-alpha photons. We build an emission model incorporating recombinations and collisions in diffuse gas, including radiative effects from nearby AGN, as well as emission sourced by stellar populations. Our treatment includes a physically motivated dust model, which we empirically calibrate to the observed LAE luminosity function. We then focus on the observability, and physical origin, of the $z=2$ Lyman-alpha cosmic web, studying the dominant emission mechanisms and spatial origins. We find that diffuse Lyman-alpha filaments are, in fact, illuminated by photons which originate, not from the intergalactic medium itself, but from within galaxies and their gaseous halos. In our model, this emission is primarily sourced by intermediate mass halos ($10^{10} - 10^{11}\,$M$_{\odot}$), principally due to collisional excitations in their circumgalactic media as well as central, young stellar populations. Observationally, we make predictions for the abundance, area, linear size, and embedded halo/emitter populations within filaments. Adopting an isophotal surface brightness threshold of $10^{-20}\,$erg$\,$s$^{-1}\,$cm$^{-2}\,$arcsec$^{-2}$, we predict a volume abundance of Lyman-alpha filaments of ${\sim}10^{-3}$ cMpc$^{-3}\,$ for lengths above $400\,$pkpc. Given sufficiently large survey footprints, detection of the Lyman-alpha cosmic web is within reach of modern integral field spectrographs, including MUSE, VIRUS, and KCWI.
description: Submitted to MNRAS
Reflections on Research: Toward an Open Data Toolkit Centered on Diversity, Equity, Inclusion, and Accessibility Principles
Creators: name: Woodbrook, Rachel
Publisher: name: My University
Year: 2020
Subjects: subject: DEIA
subject: Diversity scholarship
subject: Data management
subject: Information and Library Science
subject: Social Sciences

description: This white paper reports on research and progress toward building a toolkit to support DEIA (Diversity, Equity, Inclusion and Accessibility) considerations in data management and open data for diversity scholars. The University of Michigan Library partnered with the National Center for Institutional Diversity on this project.
description: First published at https://www.lyrasis.org/Leadership/Pages/2019-Catalyst-Fund-Projects.aspx
Stability limits of an optical frequency standard based on free Ca atoms
Creators: name: Sherman, J. A.
name: Oates, C. W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We have quantified a short term instability budget for an optical frequency standard based on cold, freely expanding calcium atoms. Such systems are the subject of renewed interest due to their high frequency stability and relative technical simplicity compared to trapped atom optical clocks. By filtering the clock laser light at 657 nm through a high finesse cavity, we observe a slight reduction in the optical Dick effect caused by aliased local oscillator noise. The ultimately limiting technical noise is measured using a technique that does not rely on a second clock or fs-comb.
description: 5 pages, 6 figures, 2 tables
The finite temperature phase transition from domain wall fermions
Creators: name: Cheng, Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present results on the finite temperature QCD transition with 2+1 flavors using Domain Wall Fermions (DWF) with the Dislocation Suppressing Determinant Ratio (DSDR). In particular, we discuss how the use of DSDR allows us to study the finite temperature transition at the coarse lattice spacings corresponding to the transition region (T = 139 - 195 MeV) with DWF at N_τ= 8. The residual chiral symmetry breaking at these lattice spacings is sufficiently small so that a constant pion mass of m_π\approx 200 MeV is obtained in our calculations. The strange quark mass is set to near its physical value. We show results on the restoration of chiral symmetry and deconfinement at finite temperature.
description: 7 pages, 4 figures, The XXIX International Symposium on Lattice Field Theory, July 10-16, 2011, Squaw Valley, Lake Tahoe, California
Progress in animation of an EMA-controlled tongue model for acoustic-visual speech synthesis
Creators: name: Steiner, Ingmar
name: Ouni, Slim
Publisher: name: arXiv
Year: 2012
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: We present a technique for the animation of a 3D kinematic tongue model, one component of the talking head of an acoustic-visual (AV) speech synthesizer. The skeletal animation approach is adapted to make use of a deformable rig controlled by tongue motion capture data obtained with electromagnetic articulography (EMA), while the tongue surface is extracted from volumetric magnetic resonance imaging (MRI) data. Initial results are shown and future work outlined.
The Calgary Renal Self-Help Group (C.H.A.T.): a social work perspective
Creators: name: O'Mahony, Anne
Publisher: name: University of Calgary
Year: 1979
Subjects: subject: Self-help groups
subject: Calgary Haemodialysis and Transplant (C.H.A.T.)
subject: Kidneys - Diseases

description: Bibliography: p. 96-98.
The Hitchhiker's guide to the galaxy catalog approach for gravitational wave cosmology
Creators: name: Gair, Jonathan R.
name: Ghosh, Archisman
name: Gray, Rachel
name: Holz, Daniel E.
name: Mastrogiovanni, Simone
name: Mukherjee, Suvodip
name: Palmese, Antonella
name: Tamanini, Nicola
name: Baker, Tessa
name: Beirnaert, Freija
name: Bilicki, Maciej
name: Chen, Hsin-Yu
name: Dálya, Gergely
name: Ezquiaga, Jose Maria
name: Farr, Will M.
name: Fishbach, Maya
name: Garcia-Bellido, Juan
name: Ghosh, Tathagata
name: Huang, Hsiang-Yu
name: Karathanasis, Christos
name: Leyde, Konstantin
name: Hernandez, Ignacio Magaña
name: Noller, Johannes
name: Pierra, Gregoire
name: Raffai, Peter
name: Romano, Antonio Enea
name: Seglar-Arroyo, Monica
name: Steer, Danièle A.
name: Turski, Cezary
name: Vaccaro, Maria Paola
name: Vallejo-Peña, Sergio Andrés
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We outline the ``dark siren'' galaxy catalog method for cosmological inference using gravitational wave (GW) standard sirens, clarifying some common misconceptions in the implementation of this method. When a confident transient electromagnetic counterpart to a GW event is unavailable, the identification of a unique host galaxy is in general challenging. Instead, as originally proposed by Schutz (1986), one can consult a galaxy catalog and implement a dark siren statistical approach incorporating all potential host galaxies within the localization volume. Trott & Hunterer 2021 recently claimed that this approach results in a biased estimate of the Hubble constant, $H_0$, when implemented on mock data, even if optimistic assumptions are made. We demonstrate explicitly that, as previously shown by multiple independent groups, the dark siren statistical method leads to an unbiased posterior when the method is applied to the data correctly. We highlight common sources of error possible to make in the generation of mock data and implementation of the statistical framework, including the mismodeling of selection effects and inconsistent implementations of the Bayesian framework, which can lead to a spurious bias.
description: 19 pages, 11 figures. Submitted to ApJ
On perturbations of almost distance-regular graphs
Creators: name: Dalfó, Cristina
name: van Dam, Edwin R.
name: Fiol, Miquel Angel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C50, 05E30

description: In this paper we show that certain almost distance-regular graphs, the so-called $h$-punctually walk-regular graphs, can be characterized through the cospectrality of their perturbed graphs. A graph $G$ with diameter $D$ is called $h$-punctually walk-regular, for a given $h\le D$, if the number of paths of length $\ell$ between a pair of vertices $u,v$ at distance $h$ depends only on $\ell$. The graph perturbations considered here are deleting a vertex, adding a loop, adding a pendant edge, adding/removing an edge, amalgamating vertices, and adding a bridging vertex. We show that for walk-regular graphs some of these operations are equivalent, in the sense that one perturbation produces cospectral graphs if and only if the others do. Our study is based on the theory of graph perturbations developed by Cvetković, Godsil, McKay, Rowlinson, Schwenk, and others. As a consequence, some new characterizations of distance-regular graphs are obtained.
Kleinere Mitteilungen
Creators: name: Oelmann, Franz
name: Ekholm, Gunnar
name: Hagen, Wilhelmine
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Bonner Jahrbücher, Bd. 143/144 (1938): Bonner Jahrbücher des Vereins von Altertumsfreunden im Rheinlande und des Rheinischen Provinzialmuseums in Bonn
Die neuen Gesichter nach dem XVII. Parteitag der Kommunistischen Partei Chinas
Creators: name: Liu, Jen-Kai
Publisher: name: China aktuell
Year: 2020

description: Auf der 1. Plenartagung des XVII. ZK der KPCh am 22. Oktober 2007 wurden die Mitglieder des Politbüros des ZK der KPCh, die Mitglieder seines Ständigen Ausschusses, die Mitglieder des ZK-Sekretariats und die Mitglieder der Zentralen Militärkommission (ZMK) der KPCh gewählt. Ferner wurden die Sekretäre der Zentralen Disziplinkontrollkommission (ZDK), die auf deren 1. Plenartagung am selben Tag gewählt worden waren, bestätigt. Das 25-köpfige Politbüro umfasst neun Mitglieder des Ständigen Ausschusses und 16 einfache Politbüromitglieder. Einen Politbürokandidaten wie beim XVI. ZK gibt es nicht mehr. Wang Gang, der den Posten innegehabt hatte, wurde jetzt in das Politbüro gewählt.
description: China aktuell, China aktuell - 6/2007
A Generalist, Automated ALFALFA Baryonic Tully-Fisher Relation
Creators: name: Ball, Catie J.
name: Haynes, Martha P.
name: Jones, Michael G.
name: Peng, Bo
name: Durbala, Adriana
name: Koopmann, Rebecca A.
name: Ribaudo, Joseph
name: O'Donoghue, Aileen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Baryonic Tully-Fisher Relation (BTFR) has applications in galaxy evolution as a testbed for the galaxy-halo connection and in observational cosmology as a redshift-independent secondary distance indicator. We use the 31,000+ galaxy ALFALFA sample -- which provides redshifts, velocity widths, and HI content for a large number of gas-bearing galaxies in the local universe -- to fit and test an extensive local universe BTFR. This BTFR is designed to be as inclusive of ALFALFA and comparable samples as possible. Velocity widths measured via an automated method and $M_{b}$ proxies extracted from survey data can be uniformly and efficiently measured for other samples, giving this analysis broad applicability. We also investigate the role of sample demographics in determining the best-fit relation. We find that the best-fit relations are changed significantly by changes to the sample mass range and to second order, mass sampling, gas fraction, different stellar mass and velocity width measurements. We use a subset of ALFALFA with demographics that reflect the full sample to measure a robust BTFR slope of $3.30\pm0.06$. We apply this relation and estimate source distances, finding general agreement with flow-model distances as well as average distance uncertainties of $\sim0.17$ dex for the full ALFALFA sample. We demonstrate the utility of these distance estimates by applying them to a sample of sources in the Virgo vicinity, recovering signatures of infall consistent with previous work.
description: 23 pages, 10 figures, submitted to ApJ
The reactivity of tungsten chlorides towards sulfur donor ligands
Creators: name: Mahadev, K. N.
Publisher: name: University of Calgary
Year: 1976
Subjects: subject: QD 181 W1 M34 1975 Microfiche
subject: Tungsten
subject: Sulphur

description: Bibliography: o. 154-161.
description: The reactions of various tungsten chlorides with sulfur donor ligands have been investigated as part of a general study of tungsten-sulfur chemistry. The reactions of the higher halides, tungsten hexachloride and pentachloride are quite complicated. They react with simple alkyl sulfides Me2S and Et2S to form (R3S)2[WC16] (R = Me, Et). The reactions involve S-dealkylation followed by reductive elimination of the respective R2S2 from the tungsten site. Alkylation of R2S by RCl, which probably occurs at the tungsten site, yields R3SC1, which reacts with the intermediate WCl4•2R2S to form the final product. The same halides show a different behavior towards the cyclic sulfide tetrahydrothiophene. The reactions are again complex, and involve the desulfurization of the tetrahydrothiophene and formation of two tungsten complexes, both containing inorganic sulfur. The reactions lead to the alkylation of tetrahydrothiophene molecule to yield the cationic species -(CH2)4Cl. From the reaction of WCl5 with tetrahydrothiophene, organic products such as ethylene, 2-chlorotetrahydrothiophene, 2,3-dihydrothiophene and propanethiol have been identified. A reaction mechanism has been postulated, involving the initial chlorination of sulfur, followed by two possible degradative pathways. Tungsten tetrachloride on the other hand reacts with these alkyl sulfides to form simple adducts of the type WCl4•2L. These complexes have been shown to be unstable with respect to displacement of the sulfide ligands by halide ions or neutral donors and therefore form excellent intermediates for W(IV) synthetic chemistry. These compounds exhibit an unexpected ability to interact with carbon monoxide and certain alkenes. Preliminary investigations have been carried out on the reactions of WC16 with the alkylthiotrimethylsilanes Me3SiSR (R = Me and Et). These reactions lead to the formation of several interesting, and sometimes polynuclear, tungsten complexes. The stoichiometry of the reaction and the nature of the solvent used seem to have a profound effect on the composition of the final product. It has been conclusively shown that alkylthiogroups tend to be oxidized by W(VI) to disulfides, which may be retained in the co-ordination sphere of the metal.
Discrete Painleve II equation over finite fields
Creators: name: Kanki, Masataka
name: Mada, Jun
name: Tamizhmani, K. M.
name: Tokihiro, Tetsuji
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 37K10, 37P25

description: We investigate the discrete Painleve II equation over finite fields. We treat it over local fields and observe that it has a property that is similar to the good reduction over finite fields. We can use this property, which seems to be an arithmetic analogue of singularity confinement, to avoid the indeterminacy of the equations over finite fields and to obtain special solutions from those defined originally over fields of characteristic zero.
description: 9 pages
Disease prevalence and conformity
Creators: name: Murray, Damian
Publisher: name: University of British Columbia
Year: 2009

description: The fitness costs and benefits of conforming to ones ingroup vary depending upon the dangers inherent in the immediate environment. In threatening environments, conformity is likely to be more beneficial than it is in less threatening environments. One specific threat that has had a profound selective influence on humans is infectious disease. Therefore, it was predicted that cultures inhabiting regions where risk of disease transmission is high would have more conformist orientations. Across four divergent measures of conformity, this was shown to be the case. Laboratory manipulations of disease, however, did not change levels of conformity. In two laboratory studies in which participants made judgments about either physical quantities (such as weight or volume) or about subjective liking for abstract art, participants did not conform more to normative information when disease was made salient compared to control conditions. Implications are discussed.
Pseudo Hermitian formulation of Black-Scholes equation
Creators: name: Jana, T. K.
name: Roy, P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Finance (q-fin.GN)
subject: FOS: Economics and business

description: We show that the non Hermitian Black-Scholes Hamiltonian and its various generalizations are eta-pseudo Hermitian. The metric operator eta is explicitly constructed for this class of Hamitonians. It is also shown that the effective Black-Scholes Hamiltonian and its partner form a pseudo supersymmetric system.
Z_p scalar dark matter from multi-Higgs-doublet models
Creators: name: Ivanov, I. P.
name: Keus, V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In many models, stability of dark matter particles is protected by a conserved Z_2 quantum number. However dark matter can be stabilized by other discrete symmetry groups, and examples of such models with custom-tailored field content have been proposed. Here we show that electroweak symmetry breaking models with N Higgs doublets can readily accommodate scalar dark matter candidates stabilized by groups Z_p with any $p \le 2^{N-1}$, leading to a variety of kinds of microscopic dynamics in the dark sector. We give examples in which semi-annihilation or multiple semi-annihilation processes are allowed or forbidden, which can be especially interesting in the case of asymmetric dark matter.
description: 10 pages
DIGITAL COMPETENCIES OF A MODERN TEACHER AS BASIS FOR SUCCESSFUL TEACHING PERFORMANCE
Creators: name: Sheraliev, Odiljon
Publisher: name: Zenodo
Year: 2023

description: The current study describes the digital competencies of teaching staff necessary for working in modern education. The authors present the well-known structures of digital competencies, analyze them and identify their own set of key competencies that contribute to the improvement of a successful pedagogical performance. The study concludes that the possession of digital competencies increases the competitiveness of teachers in the educational environment, which contributes to the success of teaching activity.
Bayesian Group Factor Analysis
Creators: name: Virtanen, Seppo
name: Klami, Arto
name: Khan, Suleiman A.
name: Kaski, Samuel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We introduce a factor analysis model that summarizes the dependencies between observed variable groups, instead of dependencies between individual variables as standard factor analysis does. A group may correspond to one view of the same set of objects, one of many data sets tied by co-occurrence, or a set of alternative variables collected from statistics tables to measure one property of interest. We show that by assuming group-wise sparse factors, active in a subset of the sets, the variation can be decomposed into factors explaining relationships between the sets and factors explaining away set-specific variation. We formulate the assumptions in a Bayesian model which provides the factors, and apply the model to two data analysis tasks, in neuroimaging and chemical systems biology.
description: 9 pages, 5 figures
A conceptual replication of Brooke’s 1991 chapter: Do Jewish responses to Copernican thought corroborate the findings?
Creators: name: Peels, Rik
name: Van Woudenberg, René
name: Van Eyghen, Hans
name: Bouter, Lex
name: Brink, G. Van Den
name: Pear, Rachel S. A.
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: History
subject: Arts and Humanities
subject: Jewish Studies
subject: Religion
subject: science and religion

description: This postdoctoral research is part of a subproject entitled "Progress in the humanities-- replication of cornerstone studies," which in turn sits within the larger project "Epistemic Progress in the University" being carried out at the Abraham Kuyper Center, Vrije Universiteit Amsterdam.
Relationship of late-Wisconsin Rocky Mountain and Laurentide ice in the vicinity of Sundre, Alberta
Creators: name: Boydell, A. N. (Anthony Nigel)
Publisher: name: University of Calgary
Year: 1970
Subjects: subject: QE 697 B67 1970
subject: Glacial epoch - Alberta - Sundre
subject: Sedimentation and deposition

description: Bibliography: p. 120-123.
Multiple glaciation in the Foothills, Rocky Mountain House Area, Alberta
Creators: name: Boydell, A. N. (Anthony Nigel)
Publisher: name: University of Calgary
Year: 1972
Subjects: subject: QE 697 B667 1972
subject: Glacial epoch - Alberta - Rocky Mountain House area
subject: Geology - Alberta - Rocky Mountain House area

description: Bibliography: p. 86-89.
PRACTICE, OPPORTUNITIES AND CHALLENGES OF ELECTRONIC BANKING CUSTOMERS IN ADDIS ABEBA AREA CASE STUDY ON CBE, AB,DB AND ABY
Creators: name: FikruAbebe
Publisher: name: Zenodo
Year: 2019

description: The main objective of this study is to find out the factors influencing the usage of E-banking in Ethiopia. The study tries to find the main independent variables that could hamper the development of E-banking service products based on the two widely used adoption theories which are Technology Acceptance Model (TAM) and Innovation Diffusion Theory (IDT). The study identify main independent variables (perceived usefulness, perceived ease of use, compatibility, complexity, triability, observability, perceived risk or trust, culture, awareness,

infrastructure, legal framework and government support) and usage or practicing of E-banking

service products as dependant variable. Data on bank clients was collected in Addis Ababa from one government bank, Commercial Bank of Ethiopia and three private banks, Awash Bank, Dashen Bank, and Bank of Abyssinia and random quota sampling was taken from each of these banks.
Real-space imaging of quantum Hall effect edge strips
Creators: name: Suddards, M. E.
name: Baumgartner, A.
name: Henini, M.
name: Mellor, C. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We use dynamic scanning capacitance microscopy (DSCM) to image compressible and incompressible strips at the edge of a Hall bar in a two-dimensional electron gas (2DEG) in the quantum Hall effect (QHE) regime. This method gives access to the complex local conductance, Gts, between a sharp metallic tip scanned across the sample surface and ground, comprising the complex sample conductance. Near integer filling factors we observe a bright stripe along the sample edge in the imaginary part of Gts. The simultaneously recorded real part exhibits a sharp peak at the boundary between the sample interior and the stripe observed in the imaginary part. The features are periodic in the inverse magnetic field and consistent with compressible and incompressible strips forming at the sample edge. For currents larger than the critical current of the QHE break-down the stripes vanish sharply and a homogeneous signal is recovered, similar to zero magnetic field. Our experiments directly illustrate the formation and a variety of properties of the conceptually important QHE edge states at the physical edge of a 2DEG.
description: 7 pages
Dark matter produced from right-handed neutrinos
Creators: name: Li, Shao-Ping
name: Xu, Xun-Jie
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Right-handed neutrinos (RHNs) provide a natural portal to a dark sector accommodating dark matter (DM). In this work, we consider that the dark sector is connected to the standard model only via RHNs and ask how DM can be produced from RHNs. Our framework concentrates on a rather simple and generic interaction that couples RHNs to a pair of dark particles. Depending on whether RHNs are light or heavy in comparison to the dark sector and also on whether one or both of them are in the freeze-in/out regime, there are many distinct scenarios resulting in rather different results. We conduct a comprehensive and systematic study of all possible scenarios in this paper. For illustration, we apply our generic results to the type-I seesaw model with the dark sector extension, addressing whether and when DM in this model can be in the freeze-in or freeze-out regime. Some observational consequences in this framework are also discussed.
description: 33 pages, 5 figures; calculations on non-thermal spectra added; matching the JCAP published version