cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Analyses des vagues de chaleur survenues depuis le début du 20e siècle dans trois villes principales du sud-est du Canada
Creators: name: Beaudry, Marie-Lore
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2021
Subjects: Vague de chaleur
Changement climatique
Événement extrême
Canada
Humidex

description: Au cours des dernières années, des recherches réalisées à grande échelle ont permis de démontrer une augmentation de la fréquence, de l’intensité et/ou la durée des vagues de chaleur (VC) dans plusieurs régions du globe depuis le milieu du 20e siècle. Or, au Canada, les tendances historiques du phénomène ont été peu explorées. Dans ce contexte, la recherche qui suit a permis de mettre en lumière les tendances des VC de trois régions métropolitaines de recensement (RMR) du sud-est du Canada, soit Montréal, Ottawa et Toronto, afin de déterminer si le phénomène s’est amplifié au pays comme dans certaines autres régions du monde, et ce depuis le début du 20e siècle. Dans le cadre de cette recherche, des analyses statistiques ont été réalisées grâce aux données météorologiques historiques canadiennes récoltées sur la plateforme d’Environnement Canada. Plusieurs caractéristiques des VC, telles que la fréquence annuelle, la durée maximale et totale, l’intensité maximale, ainsi que la date du premier événement annuel, ont été explorées selon une gamme de seuils. De plus, les températures ressenties en période de VC de même que les tendances du phénomène dans les régions rurales situées aux abords des RMR préalablement identifiées ont été étudiées. Les conclusions de l’étude indiquent qu’il ne semble pas exister de tendance significative à la hausse ou à la baisse pour aucune des caractéristiques des VC dans les trois RMR canadiennes étudiées, pendant la période d’étude couverte. Ceci signifie donc que les événements de VC ne se sont pas amplifiés dans la région d’étude entre le début des années 1900 et le présent.
$R^4$ couplings and automorphic unipotent representations
Creators: name: Pioline, Boris
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Four-graviton, eight-derivative couplings in the low energy effective action of toroidal type II string compactifications are tightly constrained by U-duality invariance and by supersymmetry. In this note, we revisit earlier proposals for the automorphic form governing these couplings in dimension D=3,4,5,6, and propose that the correct automorphic form is the minimal theta series for the corresponding U-duality group. Evidence for this proposal comes from i) the matching of infinitesimal characters, ii) the fact that the Fourier coefficients have support on 1/2-BPS charges and iii) decompactification limits. In particular, we show that non-perturbative effects can be interpreted as 1/2-BPS instantons, or 1/2-BPS particles in one dimension higher (together with Taub-NUT instantons in the D=3 case). Based on similar considerations, we also conjecture the form of 1/4-BPS saturated couplings such as $\nabla^4 R^4$ couplings in the same dimensions.
description: 30 pages; v2: new appendix on decompactification limits, and minor corrections, published version; v3: fixed various misprints
$κ$-Minkowski and Snyder algebra from reparametrisation symmetry
Creators: name: Chatterjee, Chandrasekhar
name: Gangopadhyay, Sunandan
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Following our earlier work \cite{sunandan1, sunandan2}, we derive noncommuting phase-space structures which are combinations of both the $κ$-Minkowski and Snyder algebra by exploiting the reparametrisation symmetry of the recently proposed Lagrangian for a point particle \cite{subir} satisfying the exact Doubly Special Relativity dispersion relation in the Magueijo-Smolin framework.
description: Accepted in Euro Physics Letters
Do Thai Capital Markets Accurately Price Cash Flows and Normal and Abnormal Accruals?
Creators: name: Somchai Supattarakul
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี มหาวิทยาลัยธรรมศาสตร์
Year: 2014
Subjects: Earnings Persistence; Market Mispricing; Cash Flows; Accruals; Abnormal Accruals; Discretionary Accruals

description: 142 (เม.ย.-มิ.ย. 57), 37, วารสารบริหารธุรกิจ JBA
Supplementary Methods from Comparing acoustic and satellite telemetry: an analysis quantifying the space use of Chelonia mydas in Bimini, Bahamas
Creators: name: Hardin, Emily E.
name: Cullen, Joshua A.
name: Fuentes, Mariana M.P.B.
Publisher: name: The Royal Society
Year: 2023
Subjects: classificationCode: 310399
subject: Ecology not elsewhere classified
classificationCode: 310402
subject: Biogeography and phylogeography
classificationCode: 370899
subject: Oceanography not elsewhere classified

description: Supplementary methods for cost analysis
Selective substitution in orbital domains of a low doped manganite : an investigation from Griffiths phenomenon and modification of glassy features
Creators: name: Mukherjee, K.
name: Banerjee, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: An effort is made to study the contrast in magnetic behavior resulting from minimal disorder introduced by substitution of 2.5% Ga or Al in Mn-site of La${_{0.9}}$Sr$_{0.1}$MnO${_3}$. It is considered that Ga or Al selectively creates disorder within the orbital domains or on its walls, causing enhancement of Griffiths phase (GP) singularity for the former and disappearance of it in the later case. It is shown that Ga replaces Mn$^{3+}$ which is considered to be concentrated within the domains, whereas Al replaces Mn$^{4+}$ which is segregated on the hole-rich walls, without causing any significant effect on structure or ferromagnetic transition temperatures. Thus, it is presumed that the effect of disorder created by Ga extend across the bulk of the domain having correlation over similar length-scale resulting in enhancement of GP phenomenon. On the contrary, effect of disorder created by Al remains restricted to the walls resulting in the modification of the dynamics arising from the domain walls and suppresses the GP. Moreover contrasting features are observed in the low temperature region of the compounds; a re-entrant spin glass like behavior is observed in the Ga doped sample, while the observed characteristics for the Al doped sample is ascribed only to modified domain wall dynamics with the absence of any glassy phase. Distinctive features in third order susceptibility measurements reveals that the magnetic ground state of the entire series comprises of orbital domain states. These observations bring out the role of the nature of disorder on GP phenomenon and also reconfirms the character of self-organization in low-doped manganites.
Supplementary Tables and Figures from Comparing acoustic and satellite telemetry: an analysis quantifying the space use of Chelonia mydas in Bimini, Bahamas
Creators: name: Hardin, Emily E.
name: Cullen, Joshua A.
name: Fuentes, Mariana M.P.B.
Publisher: name: The Royal Society
Year: 2023
Subjects: classificationCode: 310399
subject: Ecology not elsewhere classified
classificationCode: 310402
subject: Biogeography and phylogeography
classificationCode: 370899
subject: Oceanography not elsewhere classified

description: Supplementary tables and figures
Supplementary Analysis from Comparing acoustic and satellite telemetry: an analysis quantifying the space use of Chelonia mydas in Bimini, Bahamas
Creators: name: Hardin, Emily E.
name: Cullen, Joshua A.
name: Fuentes, Mariana M.P.B.
Publisher: name: The Royal Society
Year: 2023
Subjects: classificationCode: 310399
subject: Ecology not elsewhere classified
classificationCode: 310402
subject: Biogeography and phylogeography
classificationCode: 370899
subject: Oceanography not elsewhere classified

description: Array-Restricted Satellite Data Analysis: comparison of occurrence distributions estimated from satellite data locations only within the extent of the acoustic receiver array
Flavor Bounds and Phenomenology in the Scalar Sector of RS Scenarios
Creators: name: Toharia, Manuel
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the context of a warped extra-dimension with Standard Model fields in the bulk, we obtain the general flavor structure of the couplings to fermions of both the Higgs scalar and the radion graviscalar. In the Flavor Anarchy paradigm, these couplings are generically misaligned with respect to the fermion mass matrix and moreover the off-diagonal couplings can be estimated parametrically as a function of fermion masses and the observed mixing angles. One can then study the flavor constraints and predictions arising from these couplings.
description: 6 pages, 4 figures, To appear in the proceedings of SUSY09, the 17th International Conference on Supersymmetry and the Unification of Fundamental Interactions. Added references and correctly edited figure 3.
Relation-aware Compositional Zero-shot Learning for Attribute-Object Pair Recognition
Creators: name: Xu, Ziwei
name: Wang, Guangzhi
name: Wong, Yongkang
name: Kankanhalli, Mohan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: This paper proposes a novel model for recognizing images with composite attribute-object concepts, notably for composite concepts that are unseen during model training. We aim to explore the three key properties required by the task --- relation-aware, consistent, and decoupled --- to learn rich and robust features for primitive concepts that compose attribute-object pairs. To this end, we propose the Blocked Message Passing Network (BMP-Net). The model consists of two modules. The concept module generates semantically meaningful features for primitive concepts, whereas the visual module extracts visual features for attributes and objects from input images. A message passing mechanism is used in the concept module to capture the relations between primitive concepts. Furthermore, to prevent the model from being biased towards seen composite concepts and reduce the entanglement between attributes and objects, we propose a blocking mechanism that equalizes the information available to the model for both seen and unseen concepts. Extensive experiments and ablation studies on two benchmarks show the efficacy of the proposed model.
description: Accepted by IEEE Transactions on Multimedia
Interdisciplinary Metadata-based Research: GRAPHIA, FASCA, and LUMEN Projects
Creators: name: Umerle, Tomasz
Publisher: name: Zenodo
Year: 2025
Subjects: metadata-based research
arts, humanities and social sciences

description: This presentation was given during the workshop Metadata-based Research in Arts, Humanities and Social Sciences (March 4–5, 2025) organised by the DARIAH ERIC Bibliographical Data Working Group.
description: The Metadata-based Research in Arts, Humanities and Social Sciences workshop has been supported by DARIAH ERIC as part of the 2023–2025 Working Group funding round.
A comparison of nonparametric tests of independence
Creators: name: Nemec, Amanda Frances
Publisher: name: University of British Columbia
Year: 2010

description: The nonparametrie tests of bivariate independence, based on Spearman's rho, Kendall's tau, the Blum-Kiefer-Rosenblatt statistic, the Fisher-Yates normal scores coefficient and the quadrant sum are compared with the parametric test based on the ordinary correlation coefficient. The tests are compared in the bivariate normal case by recording the Pitman and Bahadur efficiencies of each test. The empirical powers resulting from a Monte Carlo study are also given for the tests. The components of the Blum-Kiefer-Rosenblatt statistic are derived and are related to linear rank statistics. The rank statistic associated with the first component is suggested as a new nonparametric test of independence. This test is included in the comparison and is shown to perform reasonably well. As one sided tests of independence in bivariate populations the Fisher-Yates coefficient and the sample correlation coefficient are to be preferred over the other tests. As two sided tests the Blum-Kiefer-Rosenblatt statistic is the best test for alternatives near the null hypothesis. When the alternatives are distant from the null hypothesis the Fisher-Yates coefficient or the sample correlation coefficient should be used. The quadrant sum always performs poorly while the other nonparametric tests, including that based on the first component of the Blum-Kiefer-Rosenblatt statistic are acceptable tests.
KOMPYUTERNING STATIK VA DINAMIK OPERATIV XOTIRALARI
Creators: name: Tojimamatov, Israiljon
name: Nazirov, A'zamjon
Publisher: name: Zenodo
Year: 2023

description: Ushbu maqolada kompyuterning static va dinamik xotiralari mavzusi ko’rsatilgan. Static xotira va dinamik xotiralar orasidagi farqlar, ularning foydalanish sohalari haqida muhokama qilingan. Static xotiraning tezligi va sodda foydalanishi, ammo uning cheklanishlari ham keltirilgan. Dinamik xotira esa yorqin tashqi xotira manbalaridan foydalanish imkoniyatiga ega, lekin uning saqlash va yuklash jarayonlari bilan bog'liq muammoalari ham qanday hal qilish mumkinligi ko'rib chiqilgan.
Bursty star formation during the Cosmic Dawn driven by delayed stellar feedback
Creators: name: Furlanetto, Steven R.
name: Mirocha, Jordan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In recent years, several analytic models have demonstrated that simple assumptions about halo growth and feedback-regulated star formation can match the (limited) existing observational data on galaxies at z>6. By extending such models, we demonstrate that imposing a time delay on stellar feedback (as inevitably occurs in the case of supernova explosions) induces burstiness in small galaxies. Although supernova progenitors have short lifetimes (~5-30 Myr), the delay exceeds the dynamical time of galaxies at such high redshifts. As a result, star formation proceeds unimpeded by feedback for several cycles and "overshoots" the expectations of feedback-regulated star formation models. We show that such overshoot is expected even in atomic cooling halos, with masses up to ~10^10.5 Msun at z>6. However, these burst cycles damp out quickly in massive galaxies, because large haloes are more resistant to feedback so retain a continuous gas supply. Bursts in small galaxies - largely beyond the reach of existing observations - induce a scatter in the luminosity of these haloes (of ~1 mag) and increase the time-averaged star formation efficiency by up to an order of magnitude. This kind of burstiness can have substantial effects on the earliest phases of star formation and reionization.
description: 15 pages, 10 figures, submitted to MNRAS
Composition Sensitivity (for the Cosmic Ray Anisotropy with SWGO)
Creators: name: Taylor, A. M.
name: Giacinti, G.
name: Desiati, P.
name: Velez, J. C. Diaz
name: Chiavassa, A.
name: Di Sciascio, G.
name: Velazquez, J. C. Arteaga
name: Kunwar, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A number of cosmic-ray observatories have measured a change in both phase and amplitude of the dipole component in the distribution of cosmic-ray arrival directions above a primary energy of 100 TeV. We focus on probing the cosmic-ray dipole and multipole evolution in the energy region of mutli TeV to beyond PeV with a future large-area gamma-ray observatory, such as the Southern Wide-field Gamma-ray Observatory (SWGO). The ability to discriminate between different mass groups is essential to understand the origin of this evolution. Through a consideration of the energy and mass resolution for cosmic-ray detection by such an observatory, we estimate its separation power for decomposing the full-particle anisotropy into mass groups. In particular, we explore the feasibility of probing the dipole evolution with rigidity with SWGO. In this way, we demonstrate the great potential that this instrument offers for providing a deeper understanding of the origin of the cosmic-ray anisotropy.
description: Proceedings of the 37th International Cosmic Ray Conference (ICRC2021), 12-23 July 2021, Berlin, Germany - Online
A Statistical analysis of math 100 grades related to B.C. high school factors
Creators: name: McKeeman, Cheryl Ann
Publisher: name: University of British Columbia
Year: 2010

description: In this thesis we consider the records of students who graduated from British Cloumbia high schools, and who registered at U.B.C. for the first time in the 1977 fall term, including first-year calculus (Math 100) as one of their courses. Using canonical correlation techniques, we scale the Math 100 grades and the grade 12 mathematics grades. Other methods of multidimensional scaling are also considered. Analyses of variance are carried out to examine relationships between grade achieved in Math 100 and several-school factors, namely type of semesterization, Math 12 textbook, and geometry background for the 1976-77 high school graduating class. Then grade 12 mathematics grade is introduced as a covariate, and the above' analyses repeated. Finally the methods of correspondence analysis are described and an example of their application presented.
Precise and accurate control of the ellipticity of THz radiation using a photoconductive pixel array
Creators: name: Mosley, C. D. W.
name: Deveikis, J.
name: Lloyd-Hughes, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Full control of the ellipticity of broadband pulses of THz radiation, from linear to left- or right-handed circular polarization, was demonstrated via a 4-pixel photoconductive emitter with an integrated achromatic waveplate. Excellent polarization purity and accuracy was achieved, with Stokes parameters exceeding 97% for linear and circular polarization, via a robust scheme that corrected electrically for polarization changes caused by imperfect optical elements. Further, to assess the speed and precision of measurements of the THz polarization we introduced a new figure of merit, the standard error after one second of measurement, found to be 0.047$^{\circ}$ for the polarization angle.
description: 5 pages, 4 figures, 1 table
Recovering Trace Links Between Software Documentation And Code
Creators: name: Keim, Jan
name: Corallo, Sophie
name: Fuchß, Dominik
name: Hey, Tobias
name: Telge, Tobias
name: Koziolek, Anne
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2024
Subjects: software traceability
software architecture
documentation
transitive links
intermediate artifacts
information retrieval

description: Introduction Software development involves creating various artifacts at different levels of abstraction and establishing relationships between them is essential. Traceability link recovery (TLR) automates this process, enhancing software quality by aiding tasks like maintenance and evolution. However, automating TLR is challenging due to semantic gaps resulting from different levels of abstraction. While automated TLR approaches exist for requirements and code, architecture documentation lacks tailored solutions, hindering the preservation of architecture knowledge and design decisions.

Methods This paper presents our approach TransArC for TLR between architecture documentation and code, using componentbased architecture models as intermediate artifacts to bridge the semantic gap. We create transitive trace links by combining the existing approach ArDoCo for linking architecture documentation to models with our novel approach ArCoTL for linking architecture models to code.

Results We evaluate our approaches with five open-source projects, comparing our results to baseline approaches. The model-to-code TLR approach achieves an average F1-score of 0.98, while the documentation-to-code TLR approach achieves a promising average F1-score of 0.82, significantly outperforming baselines.

Conclusion Combining two specialized approaches with an intermediate artifact shows promise for bridging the semantic gap. In future research, we will explore further possibilities for such transitive approaches.
Quantum Markov Chains on the Comb graphs: Ising model
Creators: name: Mukhamedov, Farrukh
name: Souissi, Abdessatar
name: Hamdi, Tarek
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In the present paper, we construct quantum Markov chains (QMC) over the Comb graphs. As an application of this construction, it is proved the existence of the disordered phase for the Ising type models (within QMC scheme) over the Comb graphs. Moreover, it is also established that the associated QMC has clustering property with respect to translations of the graph. We stress that this paper is the first one where a nontrivial example of QMC over non-regular graphs is given.
The Ionization Energies of Dust-Forming Metal Oxide Clusters
Creators: name: Gobrecht, David
name: Sindel, Jan Philip
name: Lecoq-Molinos, Helena
name: Decin, Leen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Stellar dust grains are predominantly composed of mineralic, anorganic material forming in the circumstellar envelopes of oxygen-rich AGB stars. However, the initial stage of the dust synthesis, or its nucleation, is not well understood. In particular, the chemical nature of the nucleating species, represented by molecular clusters, is uncertain. We investigated the vertical and adiabatic ionization energies of four different metal-oxide clusters by means of density functional theory. They included clusters of magnesia (MgO)$_n$, silicon monoxide (SiO)$_n$, alumina (Al$_2$O$_3$)$_n$, and titania (TiO$_2$)$_n$ with stoichiometric sizes of $n$=1$-$8. The magnesia, alumina, and titania clusters showed relatively little variation in their ionization energies with respect to the cluster size n: 7.1$-$8.2 eV for (MgO)$_n$, 8.9$-$10.0 eV for (Al$_2$O$_3$)$_n$, and 9.3$-$10.5 eV for (TiO$_2$)$_n$. In contrast, the (SiO)$_n$ ionization energies decrease with size $n$, starting from 11.5 eV for $n$=1, and decreasing to 6.6 eV for $n$=8. Therefore, we set constraints on the stability limit for neutral metal-oxide clusters to persist ionization through radiation or high temperatures and for the nucleation to proceed via neutral-neutral reactions.
description: 11 pages, accepted for publication in Universe (MDPI)
Fermionic vacuum polarization around a cosmic string in compactified AdS spacetime
Creators: name: Bellucci, S.
name: Santos, W. Oliveira dos
name: de Mello, E. R. Bezerra
name: Saharian, A. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate topological effects of a cosmic string and compactification of a spatial dimension on the vacuum expectation value (VEV) of the energy-momentum tensor for a fermionic field in (4+1)-dimensional locally AdS spacetime. The contribution induced by the compactification is explicitly extracted by using the Abel-Plana summation formula. The mean energy-momentum tensor is diagonal and the vacuum stresses along the direction perpendicular to the AdS boundary and along the cosmic string are equal to the energy density. All the components are even periodic functions of the magnetic fluxes inside the string core and enclosed by compact dimension, with the period equal to the flux quantum. The vacuum energy density can be either positive or negative, depending on the values of the parameters and the distance from the string. The topological contributions in the VEV of the energy-momentum tensor vanish on the AdS boundary. Near the string the effects of compactification and gravitational field are weak and the leading term in the asymptotic expansion coincides with the corresponding VEV in (4+1)-dimensional Minkowski spacetime. At large distances, the decay of the cosmic string induced contribution in the vacuum energy-momentum tensor, as a function of the proper distance from the string, follows a power law. For a cosmic string in the Minkowski bulk and for massive fields the corresponding fall off is exponential. Within the framework of the AdS/CFT correspondence, the geometry for conformal field theory on the AdS boundary corresponds to the standard cosmic string in (3+1)-dimensional Minkowski spacetime compactified along its axis.
description: 24 pages, 6 figures
Bianchi type I models with two tilted fluids
Creators: name: Sandin, Patrik
name: Uggla, Claes
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we investigate expanding Bianchi type I models with two tilted fluids with linear equations of state. Individually the fluids have non-zero energy fluxes w.r.t. the symmetry surfaces, but these cancel each other because of the Codazzi constraint. Asymptotically toward the past the solutions approach Kasner states if the speeds of sound are less than that of light. If one of the fluids has a speed of sound that is less or equal to 1/3 of the speed of light (radiation) then the models isotropize toward the future, but if both fluids are stiffer than radiation then the final state is anisotropic with non-zero Hubble-normalized shear. The significance of these results is discussed in a broader context.
description: 19 pages, 2 figures
Positive Legendrian regular homotopies
Creators: name: Laudenbach, Francois
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 53D10

description: In contrast with what happens for Legendrian embeddings, there always exist positive loops of Legendrian immersions.
Worm Algorithm for Problems of Quantum and Classical Statistics
Creators: name: Prokof'ev, N.
name: Svistunov, B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: This is a chapter of the multi-author book "Understanding Quantum Phase Transitions," edited by Lincoln Carr and published by Taylor and Francis. In this chapter, we give a general introduction to the worm algorithm and present important results highlighting the power of the approach
description: 27 pages, 15 figures, chapter in a book
Critical adsorption and critical Casimir forces for geometrically structured confinements
Creators: name: Tröndle, M.
name: Harnau, L.
name: Dietrich, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the behavior of fluids, confined by geometrically structured substrates, upon approaching a critical point at T = Tc in their bulk phase diagram. As generic substrate structures periodic arrays of wedges and ridges are considered. Based on general renormalization group arguments we calculate, within mean field approximation, the universal scaling functions for order parameter profiles of a fluid close to a single structured substrate and discuss the decay of its spatial variation into the bulk. We compare the excess adsorption at corrugated substrates with the one at planar walls. The confinement of a critical fluid by two walls generates effective critical Casimir forces between them. We calculate corresponding universal scaling functions for the normal critical Casimir force between a flat and a geometrically structured substrate as well as the lateral critical Casimir force between two identically patterned substrates.
description: 25 pages, 21 figures
Study of pollution in the El Jadida-Safi Atlantic coastal zone (Morocco) by using PIXE and SSNTD methods
Creators: name: Erramli, H.
name: Godon, H. D.
name: Misdaq, M. A.
name: Sauvage, T.
name: Ramboz, Claire
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: In this work PIXE experiments were performed for measuring heavy and light elements (ranging from aluminium to lead) concentrations inside various polluted and unpolluted soils as well as liquid samples collected from different phosphate factory sewers in the El Jadida-Safi Atlantic coastal region (Morocco). In addition, uranium (238U) and thorium (232Th) contents were evaluated in the same samples studied by using CR-39 and LR-115 type II solid state nuclear track detectors (SSNTDs). The influence of the phosphate industry wastes on the concentrations of both radioactive and non-radioactive elements of the samples studied was investigated.
The spiral structure in the Solar neighborhood
Creators: name: Hou, L. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The spiral structure in the Solar neighborhood is an important issue in astronomy. In the past few years, there is significant progress in observation. The distances for a large number of good spiral tracers, i.e. giant molecular clouds, high-mass star-formation region masers, HII regions, O-type stars and young open clusters, have been accurately estimated, making it possible to depict the detailed properties of nearby spiral arms. In this work, we first give an overview about the research status for the Galaxy's spiral structure based on different types of tracers. Then the objects with distance uncertainties better than 15\% and $
description: 23 pages, 4 figures, published in Frontiers in Astronomy and Space Sciences as a REVIEW article
On the formation of spiral arms in dwarf galaxies
Creators: name: Zasov, Anatoly V.
name: Khoperskov, Alexander V.
name: Zaitseva, Natalia A.
name: Khrapov, Sergey S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Spiral structure (both flocculent and Grand Design types) is very rarely observed in dwarf galaxies because the formation of spiral arms requires special conditions. In this work we analyze the sample of about 40 dS-galaxies found by scanning by eye the images of late-type galaxies with $m_B<15^m$ and $M_B>-18^m$ and photometric diameter $D_{25}<12$~kpc. We found that apart from the lower average gas (HI) fraction the other properties of dS-galaxies including the presence of a bar and the isolation index do not differ much from those for dwarf Irr or Sm-types of similar luminosity and rotation velocity (or specific angular momentum).There are practically no dS-galaxies with rotation velocity below 50\,--\,60~km\,sec$^{-1}$. To check the conditions of formation of spiral structure in dwarf galaxies we carried out a series of N-body/hydrodynamic simulations of low-mass stellar-gaseous discy galaxies by varying the model kinematic parameters of discs, their initial thickness, relative masses and scale lengths of stellar and gaseous disc components, and stellar-to-dark halo masses. We came to conclusion that the gravitational mechanism of spiral structure formation is effective only for thin stellar discs, which are non-typical for dwarf galaxies, and for not too slowly rotating galaxies. Therefore, only a small fraction of dwarf galaxies with stellar/gaseous discs have spiral or ring structures. The thicker stellar disc, the more gas is required for the spiral structure to form. The reduced gas content in many dS-galaxies compared to non-spiral ones may be a result of more efficient star formation due to a higher volume gas density thank to the thinner stellar/gaseous discs.
description: 14 pages, 12 figures, accepted for publishing in Astronomy Reports
A generalised Landau-Lifshitz equation for isotropic SU(3) magnet
Creators: name: Bernatska, Julia
name: Holod, Petro
Publisher: name: arXiv
Year: 2010
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In the paper we obtain equations for large-scale fluctuations of the mean field (the field of magnetization and quadrupole moments) in a magnetic system realized by a square (cubic) lattice of atoms with spin s >= 1 at each site. We use the generalized Heisenberg Hamiltonian with biquadratic exchange as a quantum model. A quantum thermodynamical averaging gives classical effective models, which are interpreted as Hamiltonian systems on coadjoint orbits of Lie group SU(3).
description: 15 pages, 1 figure
Towards AI Logic for Social Reasoning
Creators: name: Dong, Huimin
name: Markovich, Réka
name: van der Torre, Leendert
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Artificial Intelligence (AI) logic formalizes the reasoning of intelligent agents. In this paper, we discuss how an argumentation-based AI logic could be used also to formalize important aspects of social reasoning. Besides reasoning about the knowledge and actions of individual agents, social AI logic can reason also about social dependencies among agents using the rights, obligations and permissions of the agents. We discuss four aspects of social AI logic. First, we discuss how rights represent relations between the obligations and permissions of intelligent agents. Second, we discuss how to argue about the right-to-know, a central issue in the recent discussion of privacy and ethics. Third, we discuss how a wide variety of conflicts among intelligent agents can be identified and (sometimes) resolved by comparing formal arguments. Importantly, to cover a wide range of arguments occurring in daily life, also fallacious arguments can be represented and reasoned about. Fourth, we discuss how to argue about the freedom to act for intelligent agents. Examples from social, legal and ethical reasoning highlight the challenges in developing social AI logic. The discussion of the four challenges leads to a research program for argumentation-based social AI logic, contributing towards the future development of AI logic.
On the origin of field O-type stars
Creators: name: Schilbach, E.
name: Roeser, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims: We try to identify the origins of field O-stars in the nearest 2 to 3 kpc around the Sun using the best presently available kinematic data on O-stars and on young open clusters. We investigate the question if the present-day data are consistent with the assumption that O-stars have formed in groups (clusters, associations), or in isolation. Methods: We apply the epicycle theory for back-tracing the orbits of O-type stars and of candidate parent open clusters. Results: From the 370 O-stars in the ``Galactic O star catalog v 2.0'' (GOSV2) we have investigated 93 stars classified as "field", and found the origin for 73 of them in 48 open clusters younger than 30 Myrs. Only for 32 stars or about 9% of all O-stars from this catalogue, the question of their origin in groups is not solved; some of them may have originated in isolation or may have disintegrated the group in which they formed. Fifty percent of the young open clusters (age < 30 Myr) in the ``Catalogue of Open Cluster Data'' (COCD) have O-stars as members, or have ejected at least one O-star in the first 10 Myrs of their life, or both. During this period the average mass loss from open clusters by ejecting O-stars is found to be 3 to 5 M_Sun per Myr. We prove that zeta Pup had its origin in the open cluster Trumpler 10 which it left about 2.5 Myrs ago, and that its present-day distance is 300 pc (compared to 440 pc before). The revised distance implies a significant revision of the stellar parameters (a radius of 14 R_Sun, a mass of 22.5 M_Sun, and a luminosity of log L/L_Sun of 5.74) i.e, zeta Pup is closer, less massive, and less luminous than previously thought. Our findings provide independent estimates of the present-day distances and absolute magnitudes of field O-stars.
description: 12 pages, 9 figures, 1 table, accepted for publication in Astronomy and Astrophysics
Infinite-dimensional supermanifolds over arbitrary base fields
Creators: name: Alldridge, Alexander
name: Laubinger, Martin
Publisher: name: arXiv
Year: 2009
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 58A50, 14M30, 18F99

description: In his recent investigation of a super Teichmüller space, Sachse (2007), based on work of Molotkov (1984), has proposed a theory of Banach supermanifolds using the `functor of points' approach of Bernstein and Schwarz. We prove that the the category of Berezin-Kostant-Leites supermanifolds is equivalent to the category of finite-dimensional Molotkov-Sachse supermanifolds. Simultaneously, using the differential calculus of Bertram-Glöckner-Neeb (2004), we extend Molotkov-Sachse's approach to supermanifolds modeled on Hausdorff topological super-vector spaces over an arbitrary non-discrete Hausdorff topological base field of characteristic zero. We also extend to locally k-omega base fields the `DeWitt' supermanifolds considered by Tuynman in his monograph (2004), and prove that this leads to a category which is isomorphic to the full subcategory of Molokov-Sachse supermanifolds modeled on locally k-omega spaces.
description: 36 pages; minor corrections, expanded introduction
Baryons and Baryonic Matter in Holographic QCD from Superstring
Creators: name: Suganuma, Hideo
name: Nawa, Kanabu
name: Kojo, Toru
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study baryons and baryonic matter in holographic QCD using a D4/D8/$\bar{\rm D8}$ multi-D-brane system in the superstring theory. We obtain the chiral soliton solution for baryons in the four-dimensional meson theory derived from the multi-D-brane system. For the analysis of finite baryon-density matter, we investigate the chiral soliton on $S^3$ in holographic QCD, and find the delocalization of the soliton, i.e., the swelling of baryons in dense matter.
Reconstruction of sub-threshold events of cosmic-ray radio detectors using an autoencoder
Creators: name: Bezyazeekov, P.
name: Shipilov, D.
name: Plokhikh, I.
name: Mikhaylenko, A.
name: Turishcheva, P.
name: Golovachev, S.
name: Sotnikov, V.
name: Sotnikova, E.
name: Budnev, N.
name: Fedorov, O.
name: Gress, O.
name: Grishin, O.
name: Haungs, A.
name: Huege, T.
name: Kazarina, Y.
name: Kleifges, M.
name: Korosteleva, E.
name: Kostunin, D.
name: Kuzmichev, L.
name: Lenok, V.
name: Lubsandorzhiev, N.
name: Malakhov, S.
name: Marshalkina, T.
name: Monkhoev, R.
name: Osipova, E.
name: Pakhorukov, A.
name: Pankov, L.
name: Prosin, V.
name: Schröder, F. G.
name: Zagorodnikov, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Radio detection of air showers produced by ultra-high energy cosmic rays is a cost-effective technique for the next generation of sparse arrays. The performance of this technique strongly depends on the environmental background, which has different constituents, namely anthropogenic radio frequency interference, synchrotron galactic radiation and others. These components have recognizable features, which can help for background suppression. A powerful method for handling this is the application of convolution neural networks with a specific architecture called autoencoder. By suppressing unwanted signatures, the autoencoder keeps the signal-like ones. We have successfully developed and trained an autoencoder, which is now applied to the data from Tunka-Rex. We show the procedures of the training and optimization of the network including benchmarks of different architectures. Using the autoencoder, we improved the standard analysis of Tunka-Rex in order to lower the threshold of the detection. This enables the reconstructing of sub-threshold events with energies lower than 0.1 EeV with satisfactory angular and energy resolutions.
description: Proceedings of the 37th International Cosmic Ray Conference (ICRC2021), 12-23 July 2021, Berlin, Germany - Online
Dynamic Logic of Legal Competences
Creators: name: Dong, Huimin
name: Roy, Olivier
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: We propose a new formalization of legal competences, and in particular for the Hohfeldian categories of power and immunity, through a deontic reinterpretation of dynamic epistemic logic. We argue that this logic explicitly captures the norm-changing character of legal competences while providing a sophisticated reduction of the latter to static normative positions. The logic is completely axiomatizable, and we apply it to a concrete case in German contract law to illustrate that it can capture the distinction between legal ability and legal permissibility.
FINANCING MECHANISMS OF ISLAMIC FINANCE PROJECTS FROM INVESTMENTS
Creators: name: Khoshimov, Jakhongir
Publisher: name: Zenodo
Year: 2023

description: According to the report of the Council of International Financial Services, "In 2022, the volume of financing of investment projects in the global financier association will be 3.25 trillion. Established the US Cabinet. However, due to problems such as the decrease in inflation, the increase in the price of oil and raw materials, and geopolitical uncertainty, the volume of financing of investments in the global financial institution increased by 11.3 percent in 2021 and 6.2 percent in 2022.
Strange hadron elliptic flow from 200 GeV Cu+Cu collisions
Creators: name: Shi, Shusu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Collective flow reflects dynamical evolution in high-energy heavy ion collisions. In particular, the strange hadron elliptic flow reflects early collision dynamics. We present results from a systematic analysis of the centrality dependence of strange hadron elliptic flow ($v_2$) measurement of $K_{S}^{0}$, $Λ$ and $Ξ$ for Cu + Cu collisions at 200 GeV. Results for Cu + Cu collisions are compared with results previously reported for Au + Au collisions. We will also compare our data with results from ideal hydrodynamic calculations.
description: 6 pages, 5 figures; Proc. 24th Winter Workshop on Nuclear Dynamics (2008)
Simultaneous estimation of the parameters of the distributions of independent Poisson random variables
Creators: name: Tsui, Kam-Wah
Publisher: name: University of British Columbia
Year: 2010

description: This work is devoted to simultaneously estimating the parameters of the distributions of several independent Poisson random variables. In particular, we explore the possibility of finding estimators of the Poisson parameters which have better performance than the maximum likelihood estimator (MLE). We first approach the problem from a fre-quentist point of view, employing a generally scaled loss function, called the k-normalized squared error loss function L[sub k] (λ, [sup ^]λ) = [sup P] ∑ [sub i=1] (λ[sub i] – [sup ^]λ[sub i])²/ λ[sup k][sub i], where k is a non-negative integer. The case k=0' is the squared error loss case, in which we propose a large class of estimators including those proposed by Peng [1975] as special cases. Estimators pulling the MLE towards a point other than zero as well as a point determined by the data itself are proposed, and it is shown that these estimators dominate the MLE uniformly. Under L[sub k] with k ≥ 1, we obtain a class of estimators dominating the MLE which includes the estimators proposed by Clevenson and Zidek [1975]. We next approach the problem from a Bayesian point, of view; a two-stage prior distribution is adopted and results for a large class of prior distributions are derived. Substantial savings in terms of mean squared error loss of the Bayes point estimators over the MLE are expected, especially when the Poisson parameters fall into a relatively narrow range. An empirical Bayes approach to the problem is carried out along the line suggested by Clevenson and Zidek [1975]. Some results are obtained which parallel those of Efron and Morris [1973], who work under the assumption that the random variables are normally distributed. We report the results of our computer simulation to quantitatively examine the performance of some of our proposed estimators. In most cases, the savings, under the appropriate loss functions, are an increasing function of the number of Poisson parameters. The simulation results indicate that our estimators are very promising. The savings of the Bayes estimators depend on the choice of prior hyperparameters, and hence proper choice leads to substantial improvement over the MLE. Although most of the results in this work are derived under the assumption that only one observation is taken from each Poisson distribution, we extend some results to the case where possibly more than one observation is taken. We conclude with suggestions for further work.
Vision Transformer based COVID-19 Detection using Chest X-rays
Creators: name: Krishnan, Koushik Sivarama
name: Krishnan, Karthik Sivarama
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: COVID-19 is a global pandemic, and detecting them is a momentous task for medical professionals today due to its rapid mutations. Current methods of examining chest X-rays and CT scan requires profound knowledge and are time consuming, which suggests that it shrinks the precious time of medical practitioners when people's lives are at stake. This study tries to assist this process by achieving state-of-the-art performance in classifying chest X-rays by fine-tuning Vision Transformer(ViT). The proposed approach uses pretrained models, fine-tuned for detecting the presence of COVID-19 disease on chest X-rays. This approach achieves an accuracy score of 97.61%, precision score of 95.34%, recall score of 93.84% and, f1-score of 94.58%. This result signifies the performance of transformer-based models on chest X-ray.