cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
St. Peter's Chapel of St. Luke's Episcopal Church, Celebrating 125 Years
Creators: name: Springs Historical Society/Library
Publisher: name: Unknown
Year: 2006
Subjects: Springs
East Hampton
Churches
St. Peter's Chapel
Chapels
Anniversaries

description: This card features artwork from Robert Budd in 2002 of St. Peter's Chapel of St. Luke's Church. The reverse side shows a brief description about the history of the chapel and the celebration of their 125th year.
description: This material was lent to the Long Island Collection by the Springs Historical Society Library for digitization purposes.
Electron transport through Aharonov-Bohm interferometer with laterally coupled double quantum dots
Creators: name: Kubo, Toshihiro
name: Tokura, Yasuhiro
name: Hatano, Tsuyoshi
name: Tarucha, Seigo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically investigate electron transport through an Aharonov-Bohm interferometer containing laterally coupled double quantum dots. We introduce the indirect coupling parameter $α$, which characterizes the strength of the coupling via the reservoirs between two quantum dots. $|α|=1$ indicates the strongest coupling, where only a single mode contributes to the transport in the system. Two conduction modes exist in a system where $|α|\neq 1$. The interference effects such as the Fano resonance and the Aharonov-Bohm oscillation are suppressed as the absolute value of the parameter $α$ decreases from 1. The linear conductance does not depend on the flux when $α=0$ since it corresponds to independent coupling of the dots to the reservoir modes.
description: 15 pages, 13 figures
Quantum wave equations and non-radiating electromagnetic sources
Creators: name: Davidson, Mark P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A connection between classical non-radiating sources and free-particle wave equations in quantum mechanics is rigorously made. It is proven that free-particle wave equations for all spins have currents which can be defined which are non-radiating electromagnetic sources. It is also proven that the advanced and retarded fields are exactly equal for these sources. Implications of these results are discussed.
description: 24 pages, changed content
Fast Fourier Transform computations and build-up of plastic deformation in 2D, elastic-perfectly plastic, pixelwise disordered porous media
Creators: name: Willot, Francois
name: Pellegrini, Yves-Patrick
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Stress and strain fields in a two-dimensional pixelwise disordered system are computed by a Fast Fourier Transform method. The system, a model for a ductile damaged medium, consists of an elastic-perfectly matrix containing void pixels. Its behavior is investigated under equibiaxial or shear loading. We monitor the evolution with loading of plastically deformed zones, and we exhibit a nucleation / growth / coalescence scenario of the latter. Identification of plastic ``clusters'' is eased by using a discrete Green function implementing equilibrium and continuity at the level of one pixel. Observed morphological regimes are put into correspondence with some features of the macroscopic stress / strain curves.
description: 6 pages, 5 figures. Presented at the "11th International Symposium On Continuum Models and Discrete Systems (CMDS 11)" (Ecole des Mines, Paris, July 30- August 3 2007)
Interacting Stellar EMRIs as Sources of Quasi-Periodic Eruptions in Galactic Nuclei
Creators: name: Metzger, Brian D.
name: Stone, Nicholas C.
name: Gilbaum, Shmuel
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A star that approaches a supermassive black hole (SMBH) on a circular extreme mass ratio inspiral (EMRI) can undergo Roche lobe overflow (RLOF), resulting in a phase of long-lived mass-transfer onto the SMBH. If the interval separating consecutive EMRIs is less than the mass-transfer timescale driven by gravitational wave emission (typically ~1-10 Myr), the semi-major axes of the two stars will approach each another on scales of
description: 13 pages, 4 figures, submitted to ApJ
In-medium $Δ(1232)$ potential, pion production in heavy-ion collisions and the symmetry energy
Creators: name: Cozma, M. D.
name: Tsang, M. B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Using the dcQMD transport model, the isoscalar and isovector in-medium potentials of the $Δ$(1232) baryon are studied and information regarding their effective strength is obtained from a comparison to experimental pion production data in heavy-ion collisions below 800 MeV/nucleon impact energy. The best description is achieved for an isoscalar potential moderately more attractive than the nucleon optical potential and a rather small isoscalar relative effective mass m$^*_Δ\approx$ 0.45. For the isovector component only a constraint between the potential's strength at saturation and the isovector effective mass difference can be extracted, which depends on quantities such as the slope of the symmetry energy and the neutron-proton effective mass difference. These results are incompatible with the usual assumption, in transport models, that the $Δ$(1232) and nucleon potentials are equal. The density dependence of symmetry energy can be studied using the high transverse momentum tail of pion multiplicity ratio spectra. Results are however correlated with the value of neutron-proton effective mass difference. This region of spectra is shown to be affected by uncertain model ingredients such as the pion potential or in-medium correction to inelastic scattering cross-sections at levels smaller than 10$\%$. Extraction of precise constraints for the density dependence of symmetry energy above saturation will require experimental data for pion production in heavy-ion collisions below 800 MeV/nucleon impact energy and experimental values for the high transverse momentum tail of pion multiplicity ratio spectra accurate to better than 5$\%$.
description: 22 pages, 13 figures
title: Development of an Adaptative Robotic System with Vision-Guided Capabilities and Advanced Automatic Adjustment for Laboratory Scale Production of PV Strings.
Creators: name: Bikandi, Asier
Publisher: name: TU Wien
Year: 2024
Subjects: subject: Vision-guided robotics
subject: Laboratory-scale production
subject: Adaptive robotic system
subject: Automatic adjustment
subject: PV string production
subject: High-Mix Low-Volume (HMLV) manufacturing
subject: Flexible automation solution
subject: Precision manufacturing
subject: Adaptive control strategies
subject: Integration of vision systems and robotics
subject: Advanced sensing technologies
subject: Staublil
subject: Visual servoing
subject: EtherCat

description: Arbeit an der Bibliothek noch nicht eingelangt - Daten nicht geprueft - gesperrte Arbeit (bis 2026-10-01+02:00)
description: Abweichender Titel nach Übersetzung der Verfasserin/des Verfassers
Power-law random walks
Creators: name: Vignat, C.
name: Plastino, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present some new results about the distribution of a random walk whose independent steps follow a $q-$Gaussian distribution with exponent $\frac{1}{1-q}; q \in \mathbb{R}$. In the case $q>1$ we show that a stochastic representation of the point reached after $n$ steps of the walk can be expressed explicitly for all $n$. In the case $q<1,$ we show that the random walk can be interpreted as a projection of an isotropic random walk, i.e. a random walk with fixed length steps and uniformly distributed directions.
description: 5 pages, 4 figures
Puff turbulence in the limit of strong buoyancy
Creators: name: Mazzino, Andrea
name: Rosti, Marco Edoardo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We provide a numerical validation of a recently proposed phenomenological theory to characterize the space-time statistical properties of a turbulent puff, both in terms of bulk properties, such as the mean velocity, temperature and size, and scaling laws for velocity and temperature differences both in the viscous and in the inertial range of scales. In particular, apart from the more classical shear-dominated puff turbulence, our main focus is on the recently discovered new regime where turbulent fluctuations are dominated by buoyancy. The theory is based on an adiabaticity hypothesis which assumes that small-scale turbulent fluctuations rapidly relax to the slower large-scale dynamics, leading to a generalization of the classical Kolmogorov and Kolmogorov-Obukhov-Corrsin theories for a turbulent puff hosting a scalar field. We validate our theory by means of massive direct numerical simulations finding excellent agreement.
The integral symplectic groups and the eichler trace of ℤp actions of Riemann surfaces
Creators: name: Yang, Qingjie
Publisher: name: University of British Columbia
Year: 2009

description: Every conformal automorphism on a compact connected Riemann surface S of genus g gives rise to a matrix A in the integral symplectic group SP[sub 2g](ℤ) by passing to the first homology group. [NOTE: The remainder of the abstract cannot be reproduced here; please see pp.3-4 of the accompanying pdf file].
Successes and failures of Bethe Ansatz Density Functional Theory
Creators: name: Schenk, Stefan
name: Dzierzawa, Michael
name: Schwab, Peter
name: Eckern, Ulrich
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The response of a one-dimensional fermion system is investigated using Density Functional Theory (DFT) within the Local Density Approximation (LDA), and compared with exact results. It is shown that DFT-LDA reproduces surprisingly well some of the characteristic features of the Luttinger liquid, namely the vanishing spectral weight of low energy particle-hole excitations, as well as the dispersion of the collective charge excitations. On the other hand, the approximation fails, even qualitatively, for quantities for which backscattering is important, i.e., those quantities which are crucial for an accurate description of transport. In particular, the Drude weight in the presence of a single impurity is discussed.
Using the work of the Sphakia Survey
Creators: name: Sphakia Survey
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430104
subject: Archaeology of Europe, the Mediterranean and the Levant
classificationCode: 430305
subject: Classical Greek and Roman history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430307
subject: Environmental history

description: A guide to using the Sphakia Survey online collection.
Probing Fairness of Mobile Ocular Biometrics Methods Across Gender on VISOB 2.0 Dataset
Creators: name: Krishnan, Anoop
name: Almadan, Ali
name: Rattani, Ajita
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Recent research has questioned the fairness of face-based recognition and attribute classification methods (such as gender and race) for dark-skinned people and women. Ocular biometrics in the visible spectrum is an alternate solution over face biometrics, thanks to its accuracy, security, robustness against facial expression, and ease of use in mobile devices. With the recent COVID-19 crisis, ocular biometrics has a further advantage over face biometrics in the presence of a mask. However, fairness of ocular biometrics has not been studied till now. This first study aims to explore the fairness of ocular-based authentication and gender classification methods across males and females. To this aim, VISOB $2.0$ dataset, along with its gender annotations, is used for the fairness analysis of ocular biometrics methods based on ResNet-50, MobileNet-V2 and lightCNN-29 models. Experimental results suggest the equivalent performance of males and females for ocular-based mobile user-authentication in terms of genuine match rate (GMR) at lower false match rates (FMRs) and an overall Area Under Curve (AUC). For instance, an AUC of 0.96 for females and 0.95 for males was obtained for lightCNN-29 on an average. However, males significantly outperformed females in deep learning based gender classification models based on ocular-region.
Prevención y reacción frente a restricciones públicas injustificadas de la competencia por las autoridades antitrust españolas (Prevention and Reaction Against Unjustified Restraints to Competition by Spanish Antitrust Authorities)
Creators: name: Marcos, Francisco
Publisher: name: IE Law School
Year: 2019
Subjects: Freedom of enterprise
Free competition
Competition Advocacy
Competition Promotion

description: Este artículo examina las actividades de promoción de la competencia de las autoridades de competencia españolas frente a las barreras y restricciones públicas injustificadas a la libre competencia, distinguiendo entre actuaciones preventivas y reactivas. La actuación preventiva se articula a través de informes que buscan inspirar la regulación y actuación administrativa, persuadiendo a los poderes públicos para la adopción de aquellas soluciones más respetuosas con la libre competencia en los mercados. La actuación reactiva se verifica una vez la regulación o actuación administrativa se ha materializado y es de carácter impugnatorio. Este mecanismo de intervención ex post se ha visto reforzado en diciembre de 2013 con el reconocimiento a la Comisión Nacional de los Mercados y de la Competencia de potestades adicionales de impugnación de actuaciones y normas en la Ley de Garantía de la Unidad de Mercado.
Magnetic Domain Patterns Depending on the Sweeping Rate of Magnetic Fields
Creators: name: Kudo, Kazue
name: Mino, Michinobu
name: Nakamura, Katsuhiro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The domain patterns in a thin ferromagnetic film are investigated in both experiments and numerical simulations. Magnetic domain patterns under a zero field are usually observed after an external magnetic field is removed. It is demonstrated that the characteristics of the domain patterns depend on the decreasing rate of the external field, although it can also depend on other factors. Our numerical simulations and experiments show the following properties of domain patterns: a sea-island structure appears when the field decreases rapidly from the saturating field to the zero field, while a labyrinth structure is observed for a slowly decreasing field. The mechanism of the dependence on the field sweeping rate is discussed in terms of the concepts of crystallization.
description: 4 pages, 3 figures
Atlas models of equity markets
Creators: name: Banner, Adrian D.
name: Fernholz, Robert
name: Karatzas, Ioannis
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: Computational Finance (q-fin.CP)
subject: FOS: Mathematics
subject: FOS: Economics and business
subject: 60H10, 91B28 (Primary) 60J55 (Secondary)

description: Atlas-type models are constant-parameter models of uncorrelated stocks for equity markets with a stable capital distribution, in which the growth rates and variances depend on rank. The simplest such model assigns the same, constant variance to all stocks; zero rate of growth to all stocks but the smallest; and positive growth rate to the smallest, the Atlas stock. In this paper we study the basic properties of this class of models, as well as the behavior of various portfolios in their midst. Of particular interest are portfolios that do not contain the Atlas stock.
description: Published at http://dx.doi.org/10.1214/105051605000000449 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Energy balance for forced two-dimensional incompressible ideal fluid flow
Creators: name: Filho, Milton Lopes
name: Lopes, Helena Nussenzveig
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q30, 35Q31, 76B03, 76D05

description: In [Commun Math Phys 348(1), 129-143, 2016], Cheskidov et al. proved that physically realizable weak solutions of the incompressible 2D Euler equations on a torus conserve kinetic energy. Physically realizable weak solutions are those that can be obtained as limits of vanishing viscosity. The key hypothesis was boundedness of the initial vorticity in $L^p$, $p>1$. In this work we extend their result, by adding forcing to the flow.
1990. L. Nixon, J. Moody, S. Price, O. Rackham, V. Niniou-Kindeli, 'Archaeological Survey in Sphakia, Crete', EMC/CV 34 n.s. 9: 213-20.
Creators: name: Sphakia Survey
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430104
subject: Archaeology of Europe, the Mediterranean and the Levant
classificationCode: 430305
subject: Classical Greek and Roman history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430307
subject: Environmental history

description: 1990. L. Nixon, J. Moody, S. Price, O. Rackham, V. Niniou-Kindeli, 'Archaeological Survey in Sphakia, Crete', EMC/CV 34 n.s. 9: 213-20. Copied from original Sphakia Survey website.
Toward a No-Go Theorem for an Accelerating Universe through a Nonlinear Backreaction
Creators: name: Kasai, Masumi
name: Asada, Hideki
name: Futamase, Toshifumi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The backreaction of nonlinear inhomogeneities to the cosmic expansion is re-analyzed in the framework of general relativity. Apparent discrepancies regarding the effect of the nonlinear backreaction, which exist among the results of previous works in different gauges, are resolved. By defining the spatially averaged matter energy density as a conserved quantity in the large comoving volume, it is shown that the nonlinear backreaction neither accelerates nor decelerates the cosmic expansion in a matter-dominated universe. The present result in the Newtonian gauge is consistent with the previous results obtained in the comoving synchronous gauge. Although our work does not give a complete proof, it strongly suggests the following no-go theorem: No cosmic acceleration occurs as a result of the nonlinear backreaction via averaging.
description: 6 pages (PTPTeX); accepted for publication in Prog. Theor. Phys; minor changes to match published version
Non-Ohmic negative longitudinal magnetoresistance in two-dimensional electron gas
Creators: name: Lyu, Yang-Yang
name: Zhou, Xian-Jing
name: Xiao, Zhi-Li
name: Fotovat, Roxanna
name: Xu, Jing
name: Basnet, Gobind
name: Wang, Yong-Lei
name: Jin, Dafei
name: Divan, Ralu
name: Wang, Hua-Bing
name: Kwok, Wai-Kwong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Negative longitudinal magnetoresistance (NLMR) has been reported in a variety of materials and has attracted extensive attention as an electrotransport hallmark of topological Weyl semimetals. However, its origin is still under debate. Here, we demonstrate that the NLMR in a two dimensional electron gas can be influenced by the measurement current. While the NLMR persists up to 130 K, its magnitude and magnetic field response become dependent on the applied current below 60 K. The tunable NLMR at low and high currents can be best attributed to quantum interference and disorder scattering effects, respectively. This work uncovers non-Ohmic NLMR in a non-Weyl material and highlights potential effects of the measurement current in elucidating electrotransport phenomena. We also demonstrate that NLMRs can be a valuable phenomenon in revealing the origins of other properties, such as negative MRs in perpendicular magnetic fields.
Hydrodynamic Manipulation of Nano-Objects by Thermo-Osmotic Flows
Creators: name: Fränzl, Martin
name: Cichos, Frank
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The manipulation of micro- and nano-objects is of great technological significance to construct new materials, manipulate tiny amounts of liquids in fluidic systems, or detect minute concentrations of analytes. It is commonly approached by the generation of potential energy landscapes, for example, with optical fields. Here we show that strong hydrodynamic boundary flows enable the trapping and manipulation of nano-objects near surfaces. These thermo-osmotic flows are induced by modulating the van der Waals interaction at a solid-liquid interface with optically induced temperature fields. We use a thin gold film on a glass substrate to provide localized but reconfigurable point-like optical heating. Convergent boundary flows with velocities of tens of micrometres per second are observed and substantiated by a quantitative physical model. The hydrodynamic forces acting on suspended nanoparticles and attractive van der Waals or depletion induced forces to enable precise positioning and guiding of the nanoparticles. Fast multiplexing of flow fields further provides the means for parallel manipulation of many nano-objects. Our findings have direct consequences for the field of plasmonic nano-tweezers and other thermo-plasmonic trapping schemes and pave the way for a general scheme of nanoscopic manipulation with boundary flows.
description: 9 pages, 4 figures
A systematic survey for infrared star clusters with |b|<20deg using 2MASS
Creators: name: Froebrich, D.
name: Scholz, A.
name: Raftery, C. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We used star density maps obtained from 2MASS to obtain a sample of star clusters in the entire Galactic Plane with |b|<20deg. A total of 1788 star cluster candidates are identified in this survey. Among those are 681 previously known open clusters and 86 globular clusters. A statistical analysis indicates that our sample of 1021 new cluster candidates has a contamination of about 50%. Star cluster parameters are obtained by fitting a King profile to the star density. These parameters are used to statistically identify probable new globular cluster candidates in our sample. A detailed investigation of the projected distribution of star clusters in the Galaxy demonstrates that they show a clear tendency to cluster on spatial scales in the order of 12-25pc, a typical size for molecular clouds.
description: 31 pages, 7 Figures, 3 Tables, Accepted for publication by MNRAS, A version with higher resolution figures can be found at http://astro.kent.ac.uk/~df/
The NSW Syllabus and Citizen Science - Stage 4 Curriculum mapping
Creators: name: Learning By Doing
Publisher: name: Zenodo
Year: 2021
Subjects: citizen science, curicullum, teachers, learning by doing

description: This document is a teacher resource, aimed to map citizen science projects to the Australian curriculum and provide information that will accompany teachers in their citizen science journey in the classroom. We have handpicked a range of citizen science projects which vary in nature and scope and aligned these to the four ‘knowledge and understanding’ themes of the NSW syllabus: Physical World, Earth and Space, Living World and Chemical World. We also provide an overview of citizen science contributions to skill development across all Working Scientifically processes and an overview of citizen science potential for learning across the curriculum. Learning By Doing (LBD) is a research project led by an interdisciplinary group of researchers from The University of Sydney and Taronga Conservation Society Australia. We are passionate about citizen science and its benefits for education and are researching ways to bring citizen science into schools. LBD aims to inform efforts to embed citizen science into the Australian Science Curriculum and will support its goal ‘to develop an understanding of important science concepts and processes, the practices used to develop scientific knowledge, of science’s contribution to our culture and society, and its applications in our lives.’ We want to hear what you think! LBD is constantly trying to improve. If you’ve downloaded or used one of the resources designed by LBD, we would be grateful to receive your feedback through the following link – https://forms.gle/nMvnqkMcrrvMmUdx9
Supersymmetric solutions of PT-/non-PT-symmetric and non-Hermitian Screened Coulomb potential via Hamiltonian hierarchy inspired variational method
Creators: name: Faridfathi, Gholamreza
name: Sever, Ramazan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The supersymmetric solutions of PT-symmetric and Hermitian/non-Hermitian forms of quantum systems are obtained by solving the Schrodinger equation for the Exponential-Cosine Screened Coulomb potential. The Hamiltonian hierarchy inspired variational method is used to obtain the approximate energy eigenvalues and corresponding wave functions.
description: 13 pages
Radon daughter removal from PTFE surfaces and its application in liquid xenon detectors
Creators: name: Bruenner, S.
name: Cichon, D.
name: Eurin, G.
name: Gómez, P. Herrero
name: Jörg, F.
name: Undagoitia, T. Marrodán
name: Simgen, H.
name: Rupp, N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Long-lived radon daughters are a critical background source in experiments searching for low-energy rare events. Originating from radon in ambient air, radioactive polonium, bismuth and lead isotopes plate-out on materials that are later employed in the experiment. In this paper, we examine cleaning procedures for their capability to remove radon daughters from PTFE surfaces, a material often used in liquid xenon TPCs. We found a large difference between the removal efficiency obtained for the decay chains of $^{222}$Rn and $^{220}$Rn, respectively. This indicates that the plate-out mechanism has an effect on the cleaning success. While the long-lived $^{222}$Rn daughters could be reduced by a factor of ~2, the removal of $^{220}$Rn daughters was up to 10 times more efficient depending on the treatment. Furthermore, the impact of a nitric acid based PTFE cleaning on the liquid xenon purity is investigated in a small-scale liquid xenon TPC.
Nonextensivity and q-distribution of a relativistic gas under an external electromagnetic field
Creators: name: Liu, Zhipeng
name: Du, Jiulin
name: Guo, Lina
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the nonextensivity and the q-distribution of a relativistic gas under an external electromagnetic field. We derive a formula expression of the nonextensive parameter q based on the relativistic generalized Boltzmann equation, the relativistic q-H theorem and the relativistic version of q-power-law distribution function in the nonextensive q-kinetic theory. We thus provide the connection between the parameter 1-q and the differentiation of the temperature field of the gas as well as the four-potential with respect to time and space coordinates, and therefore present the nonextensivity for the gas a clearly physical meaning.
description: 9 pages, 39 refences
2011. S. Price, ‘Estimating Ancient Greek Populations: The Evidence of Field Survey’, in A. Bowman and A. Wilson (eds), Settlement, Urbanization, and Population, Oxford: OUP, 17-35.
Creators: name: Sphakia Survey
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430305
subject: Classical Greek and Roman history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430307
subject: Environmental history
classificationCode: 430104
subject: Archaeology of Europe, the Mediterranean and the Levant

description: 2011. S. Price, ‘Estimating Ancient Greek Populations: The Evidence of Field Survey’, in A. Bowman and A. Wilson (eds), Settlement, Urbanization, and Population, Oxford: OUP, 17-35.
K-band polarimetry of an Sgr A* flare with a clear sub-flare structure
Creators: name: Meyer, L.
name: Schoedel, R.
name: Eckart, A.
name: Karas, V.
name: Dovciak, M.
name: Duschl, W. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: The supermassive black hole at the Galactic center, SgrA*, shows frequent radiation outbursts, often called 'flares'. In the near-infrared some of these flares were reported as showing intrinsic quasi-periodicities. The flux peaks associated with the quasi-periodic behavior were found to be highly polarized. Aims: The aim of this work is to present new evidence to support previous findings of the properties of the polarized radiation from SgrA* and to again provide strong support for the quasi-periodicity of ~18+-3 min reported earlier. Methods: Observations were carried out at the European Southern Observatory's Very Large Telescope on Paranal, Chile. We used the NAOS/CONICA adaptive optics/near-infrared camera instrument. By fitting the polarimetric lightcurves with a hot-spot model, we addressed the question of whether the data are consistent with this model. To fit the observed data we used a general relativistic ray-tracing code in combination with a simple hot-spot/ring model. Results: We report on new polarization measurements of a K-band flare from the supermassive black hole at the Galactic center. The data provide very strong support for a quasi-periodicity of 15.5+-2 min. The mean polarization of the flare is consistent with the direction of the electric field vector that was reported in previous observations. The data can be modeled successfully with a combined blob/ring model. The inclination i of the blob orbit must be i > 20 deg on a 3sigma level, and the dimensionless spin parameter of the black hole is derived to be a > 0.5.
description: accepted by A&A Letters for publication; 5 pages, 9 figures
OSIRIS Software: The Mask Designer Tool
Creators: name: Gonzalez-Serrano, J. I.
name: Sanchez-Portal, M.
name: Castaneda, H.
name: Quirk, R.
name: de Miguel, E. D.
name: Aguiar, M.
name: Cepa, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: OSIRIS is a Day One instrument that will be available at the 10m GTC telescope which is being built at La Palma observatory in the Canary Islands. This optical instrument is designed to obtain wide-field narrow-band images using tunable filters and to do low-resolution spectroscopy in both long-slit and multislit modes. For the multislit spectroscopy mode, we have developed a software to assist the observers to design focal plane masks. In this paper we describe the characteristics of this Mask Designer tool. We discuss the main design concepts, the functionality and particular features of the software.
description: 6 figures; accepted for publication in Experimental Astronomy
The Carpentries & Author Carpentry
Creators: name: Morrell, Thomas E.
Publisher: name: Zenodo
Year: 2021
Subjects: Carpentries
Author Carpentry
Instruction

description: This webinar will provide a brief introduction to The Carpentries instructional philosophy of researcher-to-researcher computational training. We’ll then discuss Author Carpentry, an independent set of modules that can be integrated into a Carpentries Workshops or taught as an independent curriculum. They cover topics not traditionally included in a Carpentry Workshop, such as open authorship, writing in standard formats like Markdown, creating a reproducible and interactive report in RStudio, digital object identifiers, and ORCID IDs. We’ll discuss the future of Author Carpentry and ways you can be involved in the development of this open curriculum.
Challenges in the crystal growth of Li2FeSiO4
Creators: name: Hergett, Waldemar
name: Neef, Christoph
name: Meyer, Hans-Peter
name: Klingeler, Rüdiger
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The high-pressure optical floating-zone method enables single crystal growth of the Pmnb high-temperature phase of Li2FeSiO4. The influence of growth conditions on crystal quality, phase homogeneity, and impurity formation in Li2FeSiO4 is studied. The use of different starting materials, i.e., either the P121/n1 or the Pmn21 polymorph, as well as optimization of various growth conditions is investigated. Several mm3-sized high-quality single crystals are obtained by the choice of the Pmn21 polymorph as the starting material. A general challenge of Li2FeSiO4 crystal growth is polymorph control during crystallization. While the temperature gradient at the solid-liquid interface seems to have significant impact on stabilizing the Pmnb high-temperature phase, growth velocity has no evident effect.
Numerical relativity with characteristic evolution, using six angular patches
Creators: name: Reisswig, Christian
name: Bishop, Nigel T.
name: Lai, Chi Wai
name: Thornburg, Jonathan
name: Szilagyi, Bela
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The characteristic approach to numerical relativity is a useful tool in evolving gravitational systems. In the past this has been implemented using two patches of stereographic angular coordinates. In other applications, a six-patch angular coordinate system has proved effective. Here we investigate the use of a six-patch system in characteristic numerical relativity, by comparing an existing two-patch implementation (using second-order finite differencing throughout) with a new six-patch implementation (using either second- or fourth-order finite differencing for the angular derivatives). We compare these different codes by monitoring the Einstein constraint equations, numerically evaluated independently from the evolution. We find that, compared to the (second-order) two-patch code at equivalent resolutions, the errors of the second-order six-patch code are smaller by a factor of about 2, and the errors of the fourth-order six-patch code are smaller by a factor of nearly 50.
description: 12 pages, 5 figures, submitted to CQG (special NFNR issue)
Versuche zur Querkrafttragfähigkeit von Stahlbetonplatten unter Gleich- und konzentrierten Lasten : Versuchsbericht
Experimental investigations on shear failure in RC slabs subjected to distributed and concentrated loads - Technical Report
Creators: name: Rombach, Günter Axel
name: Harter, Maike
name: Henze, Lukas
name: Finger, Harald
Publisher: name: Technische Universität Hamburg, Institut für Massivbau
Year: 2024
Subjects: subject: Querkraft
subject: Stahlbeton
subject: Platten
subject: Einzellasten
subject: gleichförmige Lasten
classificationCode: 6
subject: Technology::624: Civil Engineering, Environmental Engineering

description: Versuchsbericht über eine Versuchreihe zum Thema Querkrafttragfähigkeit von Stahlbetonplatten ohne Querkraftbewehrung unter kozentrierten Lasten und zusätzlichen gleichförmigen Lasten.
baza telemunca.sav
Creators: name: Stefan, Bruno
Publisher: name: figshare
Year: 2021
Subjects: subject: 140208 Health Economics
subject: FOS: Economics and business
subject: 140211 Labour Economics
subject: Sociology
subject: FOS: Sociology

description: The database contains the answers to the statistical survey on the effects of telework, conducted on 554 subjects in Romania.
Geometrical dynamics of edge-driven surface growth
Creators: name: Kaplan, C. Nadir
name: Mahadevan, L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Accretion of mineralized thin wall-like structures via localized growth along their edges is observed in a range of physical and biological systems ranging from molluscan and brachiopod shells to carbonate-silica composite precipitates. To understand the shape of these mineralized structures, we develop a mathematical framework that treats the thin-walled shells as a smooth surface left in the wake of the growth front that can be described as an evolving space curve. Our theory then takes an explicit geometric form for the prescription of the velocity of the growth front curve, along with some compatibility relations and a closure equation related to the nature of surface curling. The result is a set of equations for the geometrical dynamics of a curve that leaves behind a compatible surface. Solutions of these equations capture a range of geometric precipitate patterns seen in abiotic and biotic forms across scales. In addition to providing a framework for the growth and form of these thin-walled morphologies, our theory suggests a new class of dynamical systems involving moving space curves that are compatible with non-Euclidean embeddings of surfaces.
description: 25 pages, 7 figures. Submitted version
Magnetic excitations in the Kagome staircase compounds
Creators: name: Wilson, N. R.
name: Petrenko, O. A.
name: Balakrishnan, G.
name: Manuel, P.
name: Fak, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Inelastic neutron scattering measurements have been performed on single crystal samples of Co3V2O8 and Ni3V2O8. The magnetic system in these compounds is believed to be frustrated, as the magnetic ions Co2+ with S=3/2 and Ni2+ with S=1 adopt a buckled version of the Kagome lattice. Magnetic excitations have been observed in both samples using a time-of-flight neutron spectrometer. The excitation spectrum is dispersive for both samples and has a considerable gap in the low temperature phases, while the intermediate temperature phases are marked by a significant softening of the excitations energy.
description: 2 pages, 2 figures
TYPES OF TRADING AND THEIR PECULIARITIES
Creators: name: Sherboyev, Nosir
Publisher: name: Zenodo
Year: 2024

description: Language is a complex system of characters with conceptual content. Among the basic functions of the language, it is necessary to cite such as communication (communication), cognitive (thinking), cumulative (accumulation and storage of knowledge), nominative (naming things and objects), emotive-expressive (manifesting emotionality, reacting). It is argued by researchers that language is a cultural phenomenon, a derivative of social interaction.
The Somalia Poverty: How Can Economic Reform Policies and Conflicts Destroy a Country's Way of Life.
Creators: name: Mahmud, Nur Ahmed
Publisher: name: figshare
Year: 2021
Subjects: subject: 150308 International Business
subject: FOS: Economics and business

description: This thesis aimed to define the concepts of food insecurity, aid dependency and recognizing the external and internal poverty effects in Somalia. The thesis defines the critical role of food aid organizations and political stakeholders who mainly concentrated on their vision of improving the Somali society's needs and reducing poverty, despite the fact that they still have so little to solve Somali poverty.
 Somalia’s food insecurity involves a variety of causes such as political, economic, social, and environmental variables. The study investigates the role of economic reforms that affected the Somali economy that depended on the exchange goods between farmers and pastoralists. The thesis addresses the hidden gap in existing food security causes by exploring how innovation solves, corruption, crime and food shortages in practice.
 At the end of the thesis, solutions for the critical features that require action in Somalia are presented. Potential problems with Somali poverty were locally identified. A direct solution to improve the non-consumption groups, engage in development processes, and reduce poverty via innovation and self-improvement were analyzed.
Spectral characteristics of photocatalytic constant for titania
Creators: name: Ahmed, Adwaa
Publisher: name: Universität Rostock
Year: 2020
Subjects: subject: 530 Physics

description: In this project, we performed a systematic study for the spectral dependency of the photocatalytic constant of TiO2 which was fabricated by different methods and analyzed the electronic states of the used TiO2 using different approaches. We found that two simultaneous effects occur in water: an electrochemical degradation and a photocatalytic degradation of the pollutants. Furthermore, the existence of a synergetic effect was observed which is explained by the electron-hole pair separation in the electric field which increases the lifetime, even when the electric field is small.
1996. Interview about the Survey in Ta Sphakia no. 83 (Feb.-April 1996), 8-9, newspaper for Sphakiotes in Greece and abroad.
Creators: name: Sphakia Survey
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430104
subject: Archaeology of Europe, the Mediterranean and the Levant
classificationCode: 430305
subject: Classical Greek and Roman history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430307
subject: Environmental history

description: 1996. Interview about the Survey in Ta Sphakia no. 83 (Feb.-April 1996), 8-9, newspaper for Sphakiotes in Greece and abroad.
Using Muonic Hydrogen in Optical Spectroscopy Experiment to Detect Extra Dimensions
Creators: name: Luo, Feng
name: Liu, Hongya
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Considering that gravitational force might deviate from Newton's inverse-square law (ISL) and become much stronger in small scale, we propose a kind of optical spectroscopy experiment to detect this possible deviation and take electronic, muonic and tauonic hydrogen atoms as examples. This experiment might be used to indirectly detect the deviation of ISL down to nanometer scale and to explore the possibility of three extra dimensions in ADD's model, while current direct gravity tests cannot break through micron scale and go beyond two extra dimensions scenario.
description: 9 pages, 2 figures. To appear in IJTP
NNLO analysis of unpolarized DIS structure functions
Creators: name: Blümlein, J.
name: Böttcher, H.
name: Guffanti, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the results of a NNLO QCD analysis of the World data on unpolarized DIS Non-Singlet Structure functions.
description: 4 pages, 1 figure, to appear in the proceedings of DIS 2006, Tsukuba, Japan, April 2006
A robust transition to homochirality in complex chemical reaction networks
Creators: name: Laurent, Gabin
name: Lacoste, David
name: Gaspard, Pierre
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Homochirality, i.e. the dominance across all living matter of one enantiomer over the other among chiral molecules, is thought to be a key step in the emergence of life. Building on ideas put forward by Frank and many others, we proposed recently one such mechanism in G. Laurent et al., PNAS (2021) based on the properties of large out of equilibrium chemical networks. We showed that in such networks, a phase transition towards an homochiral state is likely to occur as the number of chiral species in the system becomes large or as the amount of free energy injected into the system increases. This paper aims at clarifying some important points in that scenario, not covered by our previous work. We first analyze the various conventions used to measure chirality, introduce the notion of chiral symmetry of a network, and study its implications regarding the relative chiral signs adopted by different groups of molecules. We then propose a generalization of Frank's model for large chemical networks, which we characterize completely using methods of random matrices. This analysis can be extended to sparse networks, which shows that the emergence of homochirality is a robust transition.
Linear stability analysis of a oceanic frontal system over a Submarine ridge
Creators: name: De︠ry, Francis
Publisher: name: University of British Columbia
Year: 2009

description: The stability of frontally-trapped baroclinic waves along the crest of an oceanic ridge on an f-plane is examined to determine under which conditions two neighboring, inviscid water layers, each of uniform density and momentum, can coexist without mixing by eddies associated with instabilities. A linear stability analysis for a weak disturbance is performed over a steady laminar state. The study follows that of Gawarkiewicz [1991] for a frontal system over a shelf-break, but deviates by building an implicit dispersion relation to solve, by finite difference, a fourth-order ordinary differential equation. The implicit dispersion relation for a submarine ridge, with straight slopes that extend to infinity, depends on four parameters that characterize the physical system. They are the nondimensional wave number, the nondimensionalized ridge slopes, and a quantity, analogous to the Richardson number, that characterizes the shearing force against the buoyancy at the pycnocline. For a model with finite straight slopes, the positions at which the slopes meet the flat bottom have to be taken into account in t he boundary conditions. The model is applied to various cases. First, both slopes are set to zero for a flat topography case and for comparison with Orlanski [1968]. In the second case, a slope is introduced beneath the front to simulate a shelf-break analogous to Flagg and Beardsley's [1978] model with a seaward false bottom condition. Stable branches of backward-propagating waves occur with phase velocity faster than the layers' speed. Unstable features occur for waves with phase velocity less or equal to the layers' speed. In further cases, the false bottom condition is replaced by shifting the foot of the ridge away from the shelf break, into a near or far location. The main findings are that a ridgefoot displacement does not change most unstable features, but it increases the number of stable branches. Finally, the shelfbreak model is modified for a symmetric ridge model by introducing another finite straight slope of the same value and length. In these cases, the main unstable features are not different from the shelfbreak model. It creates forward-propagating waves with phase velocity faster than the layers' speed.