cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Long-Term Investigation on the Effects of (Personalized) Gamification on Course Participation in a Gym
Creators: name: Altmeyer, Maximilian
name: Schubhan, Marc
name: Krüger, Antonio
name: Lessel, Pascal
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Gamification is frequently used to motivate people getting more physically active. However, most systems follow a one-size-fits-all gamification approach, although past research has shown that interpersonal differences exist in the perception of gamification elements. Also, most studies investigating the effects of gamification are rather short, although it has been shown that gamification can suffer from novelty effects. In this paper, we address both these issues by investigating whether gamification elements, integrated into a fitness course booking system, have an effect on how frequently users participate in fitness courses in a gym (N=52) over a duration of 275 days (548 days including baseline). Also, the gamification elements that we implemented are tailored to specific Hexad user types, which allows us to investigate whether using suitable gamification elements leads to an increased course participation. Our results show that gamification increased the participation in fitness courses significantly and that users who received a suitable set of gamification elements - according to their Hexad user type - increased their participation significantly more than others.
Adjustment to less-developed country competition in some Japanese industries
Creators: name: Goode, James Thomas
Publisher: name: University of British Columbia
Year: 2010

description: This exploratory study addresses the issue of adjustment to less-developed country (LDC) competition by affected firms and industries in developed countries (DCs). Empirically-based insights into the nature of the adjustment problem are inductively derived from examination of adjustment in four Japanese industries (producing, respectively; cutlery, footwear, umbrellas, and mosaic tile) which have faced severe competition from producers in the Asian newly industrializing countries (Korea, Taiwan, Hong Kong, and Singapore). The study employs existing public and non-public reports, interviews with informants in Japanese government and industry and the results of field research in a production centre. External factors favouring rapid development of LDC competitive strength are identified, including earlier Japanese exports which internationalized O.E.C.D. markets for the products examined. The pattern of evolution of LDC competitive strength along dimensions other than those of relative product standardization and factor-intensity is discussed. Japanese foreign direct investment in competing LDCs served to increase the adjustment problem of Japanese producers. This is related to the rapidity of LDC competitive development and to the structure of the Japanese industries examined. Adjustment alternatives are discussed, in terms of the concept of value-added, under the categories of: cost-improving, price-improving, and margin-improving adjustment. The last of these incorporates improvements in value-added arising from a change of product or of functional activity. The adjustment problem is seen to be a function not only of LDC development but also of concurrent DC development external to the affected industries. Variation among industry participants in the impact of the adjustment problem and in the number and nature of adjustment alternatives was highly related to differences in the functional activities of firms. Where existing producers are unable to adjust within an industry, the industry, itself, is found to "retrogress" and production activities are transferred to a geographic and socio-economic periphery within the DC. This shifts the ultimate exposure to LDC competition onto those who have the least mobility and are least able to actively adjust to that competition. Some suggestions are made regarding the implications of the findings for government, business, and further research.
Design Guidelines to Increase the Persuasiveness of Achievement Goals for Physical Activity
Creators: name: Altmeyer, Maximilian
name: Lessel, Pascal
name: Waqar, Atiq Ur Rehman
name: Krüger, Antonio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Achievement goals are frequently used to support behavior change. However, they are often not specifically designed for this purpose nor account for the degree to which a user is already intending to perform the target behavior. In this paper, we investigate the perceived persuasiveness of different goal types as defined by the 3x2 Achievement Goal Model, what people like and dislike about them and the role that behavior change intentions play when aiming at increasing step counts. We created visualizations for each goal type based on a qualitative pre-study (N=18) and ensured their comprehensibility (N=18). In an online experiment (N=118), we show that there are differences in the perception of these goal types and that behavior change intentions should be considered to maximize their persuasiveness as goals evolve. Next, we derive design guidelines on when to use which type of achievement goal and what to consider when using them
Leray-alpha simulations of wall-bounded turbulent flows
Creators: name: van Reeuwijk, Maarten
name: Jonker, Harm J. J.
name: Hanjalic, Kemo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The Leray-$α$ model reduces the range of active scales of the Navier-Stokes equations by smoothing the advective transport. Here we assess the potential of the Leray-$α$ model in its standard formulation to simulate wall-bounded flows. Three flow cases are considered: plane channel flow at $\Re_τ=590$, Rayleigh-Bénard convection at $\Ra=10^7$ and $\Pr=1$, and a side-heated vertical channel at $\Ra=5 \times 10^6$ and $\Pr=0.7$. The simulations are compared to results from a well resolved and coarse DNS. It is found that for all three flow cases, the variance in the velocity field increases as the filter width parameter $a$ is increased, where $a$ is connected to the filter width as $α_i = a Δx_i$, with $Δx_i$ the local grid size. Furthermore, the viscous and diffusive wall regions tend to thicken relative to the coarse DNS results as a function of $a$. In the cases where coarse DNS overpredicts wall gradients (as for Rayleigh-Bénard convection and the side-heated vertical channel), the thickening is beneficial. However, for the plane channel flow, coarse DNS underpredicts the wall-shear velocity, and increasing $a$ only degrades the results. It is shown that buoyancy effects need to be included with care, because of the close relation of turbulent heat flux and the production of turbulent kinetic energy.
Numerical validation of the Complex Swift-Hohenberg equation for lasers
Creators: name: Pedrosa, Juan M.
name: Hoyuelos, Miguel
name: Martel, Carlos
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Order parameter equations, such as the complex Swift-Hohenberg (CSH) equation, offer a simplified and universal description that hold close to an instability threshold. The universality of the description refers to the fact that the same kind of instability produces the same order parameter equation. In the case of lasers, the instability usually corresponds to the emitting threshold, and the CSH equation can be obtained from the Maxwell-Bloch (MB) equations for a class C laser with small detuning. In this paper we numerically check the validity of the CSH equation as an approximation of the MB equations, taking into account that its terms are of different asymptotic order, and that, despite of having been systematically overlooked in the literature, this fact is essential in order to correctly capture the weakly nonlinear dynamics of the MB. The approximate distance to threshold range for which the CSH equation holds is also estimated.
description: submitted to European Journal of Physics
Band gap analysis and carrier localization in cation-disordered ZnGeN$_2$
Creators: name: Cordell, Jacob J.
name: Tucker, Garritt J.
name: Tamboli, Adele C.
name: Lany, Stephan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Cation site disorder provides a degree of freedom in the growth of ternary nitrides for tuning the technologically relevant properties of a material system. For example, the band gap of ZnGeN$_2$ changes when the ordering of the structure deviates from that of its ground state. By combining the perspectives of carrier localization and defect states, we analyze the impact of different degrees of disordering on electronic properties in ZnGeN$_2$, addressing a gap in current studies which focus on dilute or fully disordered systems. The present study demonstrates changes in the density of states and localization of carriers in ZnGeN$_2$ calculated using band gap-corrected density functional theory and hybrid calculations on partially disordered supercells generated using the Monte Carlo method. We use localization and density of states to discuss the ill-defined nature of a band gap in a disordered material, comparing multiple definitions of the energy gap in the context of theory and experiment. Decreasing the order parameter results in a large reduction of the band gap in disordered cases. The reduction in band gap is due in part to isolated, localized states that form above the valence band continuum and are associated with nitrogen coordinated by more zinc than germanium. The prevalence of defect states in all but the perfectly ordered structure creates challenges for incorporating disordered ZnGeN$_2$ into optical devices, but the localization associated with these defects provides insight into mechanisms of electron/hole recombination in the material.
Superlight pairs in face-centred-cubic extended Hubbard models with strong Coulomb repulsion
Creators: name: Adebanjo, G D
name: Kornilovitch, P E
name: Hague, J P
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The majority of fulleride superconductors with unusually high transition-temperature to kinetic-energy ratios have a face-centred-cubic (FCC) structure. We demonstrate that, within extended Hubbard models with strong Coulomb repulsion, paired fermions in FCC lattices have qualitatively different properties than pairs in other three-dimensional cubic lattices. Our results show that strongly bound, light, and small pairs can be generated in FCC lattices across a wide range of the parameter space. We estimate that such pairs can Bose condense at high temperatures even if the lattice constant is large (as in the fullerides).
A geometrical representation of the quantum information metric in the gauge/gravity correspondence
Creators: name: Tsuchiya, Asato
name: Yamashiro, Kazushi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study a geometrical representation of the quantum information metric in the gauge/gravity correspondence. We consider the quantum information metric that measures the distance between the ground states of two theories on the field theory side, one of which is obtained by perturbing the other. We show that the information metric is represented by a back reaction to the volume of a codimension-2 surface on the gravity side if the unperturbed field theory possesses the Poincare symmetry.
description: 10 pages, published version
Charge ordering and magnetism in quarter-filled Hubbard-Holstein model
Creators: name: Kumar, Sanjeev
name: Brink, Jeroen van den
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study a two-dimensional Hubbard-Holstein model with phonons treated in the adiabatic limit. A Hartree-Fock decomposition is employed for the Hubbard term. A range of electronic densities are discussed with special emphasis on the quarter-filling ($n=0.5$). We argue that the quarter-filled system is relevant for the electronic properties observed at the interface between LaAlO$_3$ and SrTiO$_3$, where half-electron per unit cell is transferred to the TiO$_2$ layer as a consequence of the polar discontinuity at the interface. In addition to presenting the overall phase diagrams, we identify an interesting charge-ordered antiferromagnetic phase for $n=0.5$, which was also reported recently in the ab-initio study of the LaAlO$_3$-SrTiO$_3$ interface.
description: 6 pages, 5 figures
K to pi and K to 0 in 2+1 Flavor Partially Quenched Chiral Perturbation Theory
Creators: name: Aubin, C.
name: Laiho, J.
name: Li, S.
name: Lin, M. F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate results for K to pi and K to 0 matrix elements to next-to-leading order in 2+1 flavor partially quenched chiral perturbation theory. Results are presented for both the Delta I=1/2 and 3/2 channels, for chiral operators corresponding to current-current, gluonic penguin, and electroweak penguin 4-quark operators. These formulas are useful for studying the chiral behavior of currently available 2+1 flavor lattice QCD results, from which the low energy constants of the chiral effective theory can be determined. The low energy constants of these matrix elements are necessary for an understanding of the Delta I=1/2 rule, and for calculations of epsilon'/epsilon using current lattice QCD simulations.
description: 43 pages, 2 figures, uses RevTeX, added and updated references
Ultra high-energy cosmic rays from beyond the Greisen-Zatsepin-Kuz'min horizon
Creators: name: Owen, Ellis R.
name: Han, Qin
name: Wu, Kinwah
name: Yap, Y. X. Jane
name: Surajbali, Pooja
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Ultra-high-energy (UHE) cosmic rays (CRs) of energies $\sim (10^{18}-10^{20})~{\rm eV}$, accelerated in violent astrophysical environments, interact with cosmic background radiation fields via photo-hadronic processes, leading to strong attenuation. Typically, the Universe would become `opaque' to UHE CRs after several tens of Mpc, setting the boundary of the Greisen-Zatsepin-Kuz'min (GZK) horizon. In this work, we investigate the contribution of sources beyond the conventional GZK horizon to the UHE CR flux observed on Earth, when photo-spallation of the heavy nuclear CRs is taken into account. We demonstrate this contribution is substantial, despite the strong attenuation of UHE CRs. A significant consequence is the emergence of an isotropic background component in the observed flux of UHE CRs, coexisting with the anisotropic foreground component that are associated with nearby sources. Multi-particle CR horizons, which evolve over redshift, are determined by the CR nuclear composition. Thus, they are dependent on the source populations and source evolutionary histories.
description: 20 pages, 9 figures, 3 tables. Accepted for publication in ApJ
Observation of photoinduced phase transition in phase-separated Pr$_{0.55}$(Ca$_{1-y}$Sr$_{y}$)$_{0.45}$MnO$_3$ thin films via x-ray photoemission spectroscopy
Creators: name: Takubo, K.
name: Son, J. -Y.
name: Mizokawa, T.
name: Takubo, N.
name: Miyano, K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Perovskite manganite thin films, $Pr_{0.55}(Ca_{1-y}Sr_y)_{0.45}MnO_3$, have been studied using x-ray photoemission spectroscopy in order to clarify the consequence of the competition between ferromagnetic metal (FM) and charge-orbital ordered insulator (COOI). Films with $y$ = 0.40 undergo uniform paramagnetic insulator to FM transition. On the other hand, in films with $y$ = 0.25, the composition near the bicritical point, phase separation of COOI and FM domains is indicated by the spectral change below 125 K. Interestingly, between 50 K and 70 K, the visible laser illumination transfers the COOI-like spectra obtained in cooling process to the FM-like spectra obtained in warming process. This indicates that the photoinduced IMT is governed by the increase of the FM volume fraction and is deeply related to the phase separation between the FM and COOI states.
description: 10 pages, 4 figures
Normal State Correlated Electronic Structure of Iron Pnictides
Creators: name: Craco, L.
name: Laad, M. S.
name: Leoni, S.
name: Rosner, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We describe the correlated electronic structure of a prototype Fe-pnictide superconductor, $SmO_{1-x}F_{x}FeAs$, using LDA+DMFT. Strong, multi-orbital electronic correlations generate a low-energy pseudogap in the undistorted phase, giving a bad, incoherent metal in qualitative agreement with observations. Very good semi-quantitative agreement with the experimental spectral functions is seen, and interpreted, within a correlated, multi-orbital picture. Our results show that Fe-pnictides should be understood as low-carrier density, incoherent metals, in resemblance to the underdoped cuprate superconductors.
description: 4 pages, 3 figures
Generalized pseudo-Newtonian potential for studying accretion disk dynamics in off-equatorial planes around rotating black holes: Description of a vector potential
Creators: name: Ghosh, Shubhrangshu
name: Mukhopadhyay, Banibrata
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We prescribe a pseudo-Newtonian vector potential for studying accretion disks around Kerr black holes. The potential is useful to study the inner properties of disk not confined to the equatorial plane where general relativistic effect is indispensable. Therefore, we incorporate the essential properties of the metric at the inner radii through the pseudo-Newtonian potential derived from the general Kerr spacetime. The potential, reproducing most of the salient features of the general-relativity, is valid for entire regime of Kerr parameter. It reproduces the last stable circular orbit exactly as that in the Kerr geometry. It also reproduces last bound orbit and energy at last stable circular orbit with a maximum error ~7% and ~15% respectively upto an orbital inclination 30 degree.
description: 22 AASTeX pages including 5 postscript figures; Accepted for publication in The Astrophysical Journal
FAIR maturity indicators in the life sciences
Creators: name: Ammar, Ammar
Publisher: name: Zenodo
Year: 2020
Subjects: FAIR
Data sharing
maturity indicators
metrics

description: Data sharing and reuse are crucial to enhance scientific progress and maximize return of investments in science. Although attitudes are increasingly favorable, data reuse remains difficult due to lack of infrastructures, standards, and policies. The FAIR (findable, accessible, interoperable, reusable) principles aim to provide recommendations to increase data reuse. Because of the broad interpretation of the FAIR principles, maturity indicators are necessary to determine the FAIRness of a dataset. In this work, we propose a reproducible computational workflow to assess data FAIRness in the life sciences. Our implementation follows principles and guidelines recommended by the maturity indicator authoring group and integrates concepts from the literature. In addition, we propose a FAIR balloon plot to summarize and compare dataset FAIRness. We evaluated the feasibility of our method on three real use cases where researchers looked for six datasets to answer their scientific questions. We retrieved information from repositories (ArrayExpress, Gene Expression Omnibus, eNanoMapper, caNanoLab, NanoCommons and ChEMBL), a registry of repositories (re3data.org), and a searchable resource (Google Dataset Search) via application program interfaces (API) wherever possible. With our analysis, we found that the six datasets met the majority of the criteria defined by the maturity indicators, and we showed areas where improvements can easily be reached. We suggest that use of standard schema for metadata and the presence of specific attributes in registries of repositories could increase FAIRness of datasets.
Open science: with great data comes great responsibility
Creators: name: Stikov, Nikola
name: Jakobsen, Estrid
Publisher: name: Zenodo
Year: 2019
Subjects: open science
big data

description: This presentation was given at the 2019 Pint of Science event held in the bar St. Sulpice in Montreal. Synopsis below:

In the 20th century, the academic journals got picked up by big publishers who started charging the public a lot of money to access the science. In the 21st century, it is time to take the science back by making it open. The large amounts of high quality data generated by scientists today can revolutionize the way we practice and communicate science, but in doing so we need to strike the right balance between transparency and privacy. This talk will introduce several Canadian open science initiatives that are changing the way we think and talk about science.
Quantum memory for squeezed light
Creators: name: Appel, Juergen
name: Figueroa, Eden
name: Korystov, Dmitry
name: Lobino, M.
name: Lvovsky, A. I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We produce a 600-ns pulse of 1.86-dB squeezed vacuum at 795 nm in an optical parametric amplifier and store it in a rubidium vapor cell for 1 us using electromagnetically induced transparency. The recovered pulse, analyzed using time-domain homodyne tomography, exhibits up to 0.21+-0.04 dB of squeezing. We identify the factors leading to the degradation of squeezing and investigate the phase evolution of the atomic coherence during the storage interval.
description: To appear in PRL. Changes to version 3: we present a larger data set featuring somewhat less squeezing, but also better statistics and a lower margin of error. Some additional revisions are made in response to the referees' comments
Optimal state for keeping reference frames aligned and the Platonic solids
Creators: name: Kolenderski, Piotr
name: Demkowicz-Dobrzanski, Rafal
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The optimal N qubit states featuring highest sensitivity to small misalignment of cartesian reference frames are found using the Quantum Cramer-Rao bound. It is shown that the optimal states are supported on the symmetric subspace and hence are mathematically equivalent to a single spin J=N/2. Majorana representation of spin states is used to reveal a beautiful connection between the states optimal for aligning reference frames and the platonic solids.
Shift-symmetric $SO(N)$ multi-Galileon
Creators: name: Aoki, Katsuki
name: Manita, Yusuke
name: Mukohyama, Shinji
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A Poincarè invariant, local scalar field theory in which the Lagrangian and the equation of motion contain only up to second-order derivatives of the fields is called generalized Galileon. The covariant version of it in four dimensions is called Horndeski theory, and has been vigorously studied in applications to inflation and dark energy. In this paper, we study a class of multi-field extensions of the generalized Galileon theory. By imposing shift and $SO(N)$ symmetries on all the currently known multi-Galileon terms in general dimensions, we find that the structure of the Lagrangian is uniquely determined and parameterized by a series of coupling constants. We also study tensor perturbation in the shift-symmetric $SO(3)$ multi-Galileon theory in four dimensions. The tensor perturbations can obtain a mass term stemming from the same symmetry breaking pattern as the solid inflation. We also find that the shift-symmetric $SO(3)$ multi-Galileon theory gives rise to new cubic interactions of the tensor modes, suggesting the existence of a new type of tensor primordial non-Gaussianity.
description: 18 pages. v2: matches published version
Comprehensive Two-Point Analyses of Weak Gravitational Lensing Surveys
Creators: name: Bernstein, Gary M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a framework for analyzing weak gravitational lensing survey data, including lensing and source-density observables, plus spectroscopic redshift calibration data. All two-point observables are predicted in terms of parameters of a perturbed Robertson-Walker metric, making the framework independent of the models for gravity, dark energy, or galaxy properties. For Gaussian fluctuations the 2-point model determines the survey likelihood function and allows Fisher-matrix forecasting. The framework includes nuisance terms for the major systematic errors: shear measurement errors, magnification bias and redshift calibration errors, intrinsic galaxy alignments, and inaccurate theoretical predictions. We propose flexible parameterizations of the many nuisance parameters related to galaxy bias and intrinsic alignment. For the first time we can integrate many different observables and systematic errors into a single analysis. As a first application of this framework, we demonstrate that: uncertainties in power-spectrum theory cause very minor degradation to cosmological information content; nearly all useful information (excepting baryon oscillations) is extracted with ~3 bins per decade of angular scale; and the rate at which galaxy bias varies with redshift substantially influences the strength of cosmological inference. The framework will permit careful study of the interplay between numerous observables, systematic errors, and spectroscopic calibration data for large weak-lensing surveys.
description: submitted to ApJ
Charmonium Polarization in High Energy Collisions
Creators: name: Saleev, V. A.
name: Vasin, D. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider charmonium polarization at high-energy hadron collider Tevatron in the framework of the nonrelativistic QCD (NRQCD) and the k_T-factorization approach. The polarization effects are studied for the direct and the prompt production channels. The obtained predictions can be used to test the Regge limit of QCD and the NRQCD formalism.
description: Talk presented at XI Workshop on High Energy Spin Physics, JINR, Dubna, 2005
A Methodology for Hierarchical Classification of Semantic Answer Types of Questions
Creators: name: Ammar, Ammar
name: Celebi, Remzi
name: Mehryar, Shervin
Publisher: name: Zenodo
Year: 2020
Subjects: question answering
semantic question answering
knowledge graph
text classification

description: Question answering systems have recently been integrated with many smart devices and search engines. Answer type prediction plays an important role in question answering systems as it can help filter irrelevant results and improve overall search and retrieval performance. Here, we present our approach for answer type prediction using the datasets provided for the International Semantic Web Conference (ISWC 2020) SMART Task Challenge. Predicting granular answer types for a question from a big knowledge graph is a greater challenge due to the large number of possible classes. Thus, we propose a 3-step approach to tackle the challenge task. We start with building a classifier that predicts the category of the types and build another classifier just for resource types. The latter model will predict the most general (frequent) type for each question, ignoring type hierarchy. We use a multi-class text classification algorithm built-in fastai library for these two models. The models’ accuracies are 0.95 and 0.73 for category and generic type classification respectively in the validation set (20\% randomly chosen samples) of the DBPedia dataset. Next, we train a third classifier to find more specific types (sub-classes) for each question based on the previous general predicted types. We achieve 0.62 and 0.61 using NDCG@5 and NDCG@10 metrics respectively for the test set.
Substructures in hydrodynamical cluster simulations
Creators: name: Dolag, K.
name: Borgani, S.
name: Murante, G.
name: Springel, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The abundance and structure of dark matter subhalos has been analyzed extensively in recent studies of dark matter-only simulations, but comparatively little is known about the impact of baryonic physics on halo substructures. We here extend the SUBFIND algorithm for substructure identification such that it can be reliably applied to dissipative hydrodynamical simulations that include star formation. This allows, in particular, the identification of galaxies as substructures in simulations of clusters of galaxies, and a determination of their content of gravitationally bound stars, dark matter, and hot and cold gas. Using a large set of cosmological cluster simulations, we present a detailed analysis of halo substructures in hydrodynamical simulations of galaxy clusters, focusing in particular on the influence both of radiative and non-radiative gas physics, and of non-standard physics such as thermal conduction and feedback by galactic outflows. We also examine the impact of numerical nuisance parameters such as artificial viscosity parameterizations. We find that diffuse hot gas is efficiently stripped from subhalos when they enter the highly pressurized cluster atmosphere. This has the effect of decreasing the subhalo mass function relative to a corresponding dark matter-only simulation. These effects are mitigated in radiative runs, where baryons condense in the central subhalo regions and form compact stellar cores. However, in all cases, only a very small fraction, of the order of one percent, of subhalos within the cluster virial radii preserve a gravitationally bound hot gaseous atmosphere. (abridged)
description: improved manuscript, to appear in MNRAS
OVII and OVIII line emission in the diffuse soft X-ray background: heliospheric and galactic contributions
Creators: name: Koutroumpa, D.
name: Acero, F.
name: Lallement, R.
name: Ballet, J.
name: Kharchenko, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the 0.57 keV (O VII triplet) and 0.65 keV (O VIII) diffuse emission generated by charge transfer collisions between solar wind (SW) oxygen ions and interstellar H and He neutral atoms in the inner Heliosphere. These lines which dominate the 0.3-1.0 keV energy interval are also produced by hot gas in the galactic halo (GH) and possibly the Local Interstellar Bubble (LB). We developed a time-dependent model of the SW Charge-Exchange (SWCX) X-ray emission, based on the localization of the SW Parker spiral at each instant. We include input SW conditions affecting three selected fields, as well as shadowing targets observed with XMM-Newton, Chandra and Suzaku and calculate X-ray emission fot O VII and O VIII lines. We determine SWCX contamination and residual emission to attribute to the galactic soft X-ray background. We obtain ground level intensities and/or simulated lightcurves for each target and compare to X-ray data. The local 3/4 keV emission (O VII and O VIII) detected in front of shadowing clouds is found to be entirely explained by the CX heliospheric emission. No emission from the LB is needed at these energies. Using the model predictions we subtract the heliospheric contribution to the measured emission and derive the halo contribution. We also correct for an error in the preliminary analysis of the Hubble Deep Field North (HDFN).
description: 21 pages (3 on-line), 10 figures (4 on-line), accepted for publication in Astronomy and Astrophysics
A density-wave-like transition in the polycrystalline V3Sb2 sample with bilayer kagome lattice
Creators: name: Wang, N. N.
name: Gu, Y. H.
name: McGuire, M. A.
name: Yan, J. Q.
name: Shi, L. F.
name: Cui, Q.
name: Chen, K. Y.
name: Wang, Y. X.
name: Zhang, H.
name: Yang, H. X.
name: Dong, X. L.
name: Jiang, K.
name: Hu, J. P.
name: Wang, B. S.
name: Sun, J. P.
name: Cheng, J. -G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Recently, transition-metal-based kagome metals have aroused much research interest as a novel platform to explore exotic topological quantum phenomena. Here we report on the synthesis, structure, and physical properties of a bilayer kagome lattice compound V3Sb2. The polycrystalline V3Sb2 samples were synthesized by conventional solid-state-reaction method in a sealed quartz tube at temperatures below 850 Celsius degree. Measurements of magnetic susceptibility and resistivity revealed consistently a density-wave-like transition at Tdw ~ 160 K with a large thermal hysteresis, even though some sample-dependent behaviors are observed presumably due to the different preparation conditions. Upon cooling through Tdw, no strong anomaly in lattice parameters and no indication of symmetry lowering were detected in powder x-ray diffraction measurements. This transition can be suppressed completely by applying hydrostatic pressures of about 1.8 GPa, around which no sign of superconductivity is observed down to 1.5 K. Specific-heat measurements reveal a relatively large Sommerfeld coefficient γ = 18.5 mJ/mol-K2, confirming the metallic ground state with moderate electronic correlations. Density functional theory calculations indicate that V3Sb2 shows a non-trivial topological crystalline property. Thus, our study makes V3Sb2 a new candidate of metallic kagome compound to study the interplay between density-wave-order, nontrivial band topology, and possible superconductivity.
description: 22 pages, 8 figures
Existence of Kirillov-Reshetikhin crystals for nonexceptional types
Creators: name: Okado, Masato
name: Schilling, Anne
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 81R50, 81R10, 17B37

description: Using the methods of Kang et al. and recent results on the characters of Kirillov-Reshetikhin modules by Nakajima and Hernandez, the existence of Kirillov-Reshetikhin crystals B^{r,s} is established for all nonexceptional affine types. We also prove that the crystals B^{r,s} of type B_n^{(1)}, D_n^{(1)}, and A_{2n-1}^{(2)} are isomorphic to recently constructed combinatorial crystals for r not a spin node.
description: 23 pages; version that appeared in Representation Theory and erratum added
3D cosmic-ray muon tomography using portable muography detector
Creators: name: Chaiwongkhot, Kullapha
name: Kin, Tadahiro
name: Nagata, Yuta
name: Komori, Tomohiro
name: Okamoto, Naoya
name: Basiri, Hamid
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A feasibility demonstration of three-dimensional (3D) muon tomography was performed for infrastructure equivalent targets using the proposed portable muography detector. For the target, we used two sets of lead blocks placed at different heights. The detector consists of two muon position-sensitive detectors, made of plastic scintillating fibers (PSFs) and multi-pixel photon counters (MPPCs) with an angular resolution of 8 msr. The maximum likelihood-expectation maximization (ML-EM) method was used for the 3D imaging reconstruction of the muography simulation and measurement. For both simulation and experiment, the reconstructed positions of the blocks produce consistent results with prior knowledge of the blocks' arrangement. This result demonstrates the potential of the 3D tomographic imaging of infrastructure by using eleven detection positions for portable muography detectors to image infrastructure scale targets.
Topographically induced baroclinic eddies along a coastline
Creators: name: Swaters, Gordon E.
Publisher: name: University of British Columbia
Year: 2010

description: A mathematical model is formulated which describes the interaction between a baroclinic current and order Rossby number topography along a coastline. The lead term solution, in an asymptotic expansion in the Rossby number, is obtained for the pressure, density, velocity and mass transport fields. The lead term solution is found using a normal mode analysis and a Green's function technique. The solution is applied to the possible topographic generation of the Sitka eddy in the north east Pacific Ocean. The numerical calculations of the model and the observed location, dimensions, velocities and transports of the Sitka eddy are in very good agreement.
A high efficiency, low background detector for measuring pair-decay branches in nuclear decay
Creators: name: Tur, C.
name: Wuosmaa, A. H.
name: Austin, S. M.
name: Starosta, K.
name: Yurkon, J.
name: Estrade, A.
name: Goodman, N.
name: Lighthall, J. C.
name: Lorusso, G.
name: Marley, S. T.
name: Snyder, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We describe a high efficiency detector for measuring electron-positron pair transitions in nuclei. The device was built to be insensitive to gamma rays and to accommodate high overall event rates. The design was optimized for total pair kinetic energies up to about 7 MeV.
description: Accepted for publication by Nucl. Inst. & Meth. in Phys. Res. A (NIM A)
Optimal Entanglement Witness for Cooper Pair Splitters
Creators: name: Tam, Minh
name: Flindt, Christian
name: Brange, Fredrik
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The generation of spin-entangled electrons is an important prerequisite for future solid-state quantum technologies. Cooper pairs in a superconductor can be split into separate electrons in a spin-singlet state, however, detecting their entanglement remains an open experimental challenge. Proposals to detect the entanglement by violating a Bell inequality typically require a large number of current cross-correlation measurements, and not all entangled states can be detected in this way. Here, we instead formulate an entanglement witness that can detect the spin-entanglement using only three cross-correlation measurements of the currents in the outputs of a Cooper pair splitter. We identify the optimal measurement settings for witnessing the entanglement, and we illustrate the use of our entanglement witness with a realistic model of a Cooper pair splitter for which we evaluate the cross-correlations of the output currents. Specifically, we find that the entanglement of the spins can be detected even with a moderate level of decoherence. Our work thereby paves the way for an experimental detection of the entanglement produced by Cooper pair splitters.
description: 11 pages, 4 figures
Significance Tests for Periodogram Peaks
Creators: name: Frescura, F. A. M.
name: Engelbrecht, C. A.
name: Frank, B. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss methods currently in use for determining the significance of peaks in the periodograms of time series. We discuss some general methods for constructing significance tests, false alarm probability functions, and the role played in these by independent random variables and by empirical and theoretical cumulative distribution functions. We also discuss the concept of "independent frequencies" in periodogram analysis. We propose a practical method for estimating the significance of periodogram peaks, applicable to all time series irrespective of the spacing of the data. This method, based on Monte Carlo simulations, produces significance tests that are tailor-made for any given astronomical time series.
description: 22 pages, 11 Encapsulated Postscript figures, AAS LaTeX v5.2 Submitted to ApJ
CADE Regras de Negócio Cade em Números - AC
Creators: name: Alexandre Cordeiro Macedo
name: Paulo Eduardo Silva de Oliveira
name: Vinicius Eloy dos Reis
name: William José da Conceição Marques
name: Leonardo de Oliveira Alves Sanches Lima
name: Alessandro Lustosa Seixas Pinheiro
name: Cristiane de Freitas Leal
name: Felipe Alberto Moreira
name: Helio Ribeiro da Costa
name: Jorge Luiz Hachem Vasconcelos
name: Wendel Sousa de Anchieta
name: Márcia Abrahão Moura
name: Maria Emília Machado Telles Walter
name: Rafael Timóteo de Sousa Júnior
name: Edna Dias Canedo
name: Georges Daniel Amvame Nze
name: Valério Aymore Martins
name: Adailton Amaro Nunes
name: Alessandra de Vasconcelos Sales
name: Aline Lima da Silva
name: Ana Beatriz de Sousa Monteiro
name: Ana Flavia Araújo Santana
name: André Luiz Chaves da Silva
name: Bruno Justino Garcia Praciano
name: Caroline Emanuele da Silva Sousa
name: Danilo Freire Holanda de Paiva
name: Denise Mitie Taketomi
name: Edle Marcio dos Santos Silva
name: Eduardo Drumond Soares
name: Fábio Lúcio Lopes de Mendonça
name: Felipe Evangelista dos Santos
name: Felipe Lobão Lima
name: Guilherme Pereira Paiva
name: Hugo Bartolomeu Ferreira
name: Ian Porto e Melo
name: Igor de Almeida Gentil
name: Isabela de Lima Silva
name: Isabela Carolina Martins
name: Italo Eduardo Dias Frota
name: Izadora Oliveira Linhares
name: Jeanne Louize Emygdio
name: Julia Jamile de Oliveira Gonçalves
name: Karen Ferreira Machado
name: Lincoln Abreu Barbosa
name: Lohana Salustiano Cardoso
name: Luiz Fernando Santos de Araujo Caduda
name: Marcelo Dos Santos Vianna
name: Marcio Junior Vieira
name: Marcos Vinicius da Silva Souza
name: Mateus Alves Dantas
name: Noely Gomes de Lima
name: Paulo Henrique Batista Rodrigues
name: Rafael de Arruda Faria
name: Renato Carauta Ribeiro
name: Rogerio de Oliveira Costa
name: Thays de Oliveira Coelho
name: Thiago Augusto Montenegro Pestana
name: Vanessa Coelho Ribeiro
name: Welber Santos de Oliveira
name: Zaquel Isaque Alves Cabral
Publisher: name: Zenodo
Year: 2022

description: Pesquisa Aplicada com fundamento no estudo de necessidades, análise informacional, concepção, prototipação e experimentação com vistas à inovação tecnológica e de processos no domínio da Defesa Econômica para o Conselho Administrativo de Defesa Econômica – Cade.
title: Проблемы идентификации высокоавтоматизированного транспорта как элемента транспортной системы России
title: Problems of Identification of Highly Automated Transport as an Element of the Transportation System of Russia
Creators: name: Усольцева, Наталья Андреевна
name: Усольцев, Юрий Михайлович
Publisher: name: Издательский центр СурГУ
Year: 2021

description: В статье дана правовая характеристика и оценка перспектив правового регулирования высокоавтоматизированного (беспилотного) транспорта как элемента транспортной системы России. Исследуется вопрос соотношения высокотехнологичного и высокоавтоматизированного транспорта и возможные варианты его классификации.
description: The article provides a legal characteristic of highly automated (unmanned) transport, as an element of the transport system of Russia, and as a cyber-physical system, assesses the prospects for legal regulation of this category in the system of normative legal acts of Russia. The question of the ratio of high-tech and highly automated transport is investigated, the issues of possible options for the classification of highly automated transport are being studied.
Balancing Asymmetric Dark Matter with Baryon Asymmetry by Sphaleron Transitions
Creators: name: Chaudhuri, Arnab
name: Khlopov, Maxim Yu.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The effect of the electroweak sphaleron transition in balance between baryon excess and and the excess of stable quarks of 4th generation is studied in this paper. Considering the non-violation of $SU(2)$ symmetry and the conservation of electroweak and new charges and quantum numbers of the new family, it makes possible sphaleron transitions between baryons, leptons and 4th family of leptons and quarks. In this paper, we have tried to established a possible definite relationship between the value and sign of the 4th family excess relative to baryon asymmetry. If $U$-type quarks are the lightest quarks of the 4th family and sphaleron transitions provide excessive $\bar U$ antiquarks, asymmetric dark matter in the form of dark atom bound state of ($\bar{U} \bar{U} \bar{U}$) with primordial He nuclei is balanced with baryon asymmetry.
description: Presented at the 1st Electronic Conference on Universe, {22--28 February} 2021; Available online: https://ecu2021.sciforum.net