cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
MOJAVE: XVIII. Kinematics and Inner Jet Evolution of Bright Radio-Loud Active Galaxies
Creators: name: Lister, M. L.
name: Homan, D. C.
name: Kellermann, K. I.
name: Kovalev, Y. Y.
name: Pushkarev, A. B.
name: Ros, E.
name: Savolainen, T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have analyzed the parsec-scale jet kinematics of 447 bright radio-loud AGN, based on 15 GHz VLBA data obtained between 1994 August 31 and 2019 August 4. We present new total intensity and linear polarization maps obtained between 2017 January 1 to 2019 August 4 for 143 of these AGN. We tracked 1923 bright features for five or more epochs in 419 jets. A majority (60%) of the well-sampled jet features show either accelerated or non-radial motion. In 47 jets there is at least one non-accelerating feature with an unusually slow apparent speed. Most of the jets show variations of 10 to 50 deg in their inner jet position angle (PA) over time, although the overall distribution has a continuous tail out to 200 deg. AGN with SEDs peaked at lower frequencies tend to have more variable PAs, with BL Lacs being less variable than quasars. The Fermi LAT gamma-ray associated AGN also tend to have more variable PAs than the non-LAT AGN in our sample. We attribute these trends to smaller viewing angles for the lower spectral peaked and LAT-associated jets. We identified 13 AGN where multiple features emerge over decade-long periods at systematically increasing or decreasing PAs. Since the ejected features do not fill the entire jet cross-section, this behavior is indicative of a precessing flow instability near the jet base. Although some jets show indications of oscillatory PA evolution, we claim no bona fide cases of periodicity since the fitted periods are comparable to the total VLBA time coverage.
description: 25 pages, 16 figures, 7 tables, accepted by ApJ; full electronic tables are provided as arXiv ancillary files; figure sets are made available from the full paper source https://www.physics.purdue.edu/astro/MOJAVE/paperXVIII.tar. This article is a follow-up to the previous MOJAVE survey paper on blazar jet kinematics (arXiv:1902.09591), in which the same data gathering and calibration procedures were used
Hyperbolicity of exact hydrodynamics for three-dimensional linearized Grad's equations
Creators: name: Colangeli, M.
name: Karlin, I. V.
name: Kroger, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We extend a recent proof of hyperbolicity of the exact (to all orders in Knudsen number) linear hydrodynamic equations [M. Colangeli et al, Phys. Rev. E (2007), in press; arXiv:cond-mat/0703791v2] to the three-dimensional Grad's moment system. A proof of an H-theorem is also presented.
description: 5 pages, 2 figures
title: Allgemeine Bestimmungen der Prüfungsordnung für den Masterstudiengang Kultur und Gesellschaft der Fakultät für Kulturwissenschaften an der Universität Paderborn
title: vom 11. Juni 2019
titleType: Subtitle
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2019

description: Amtliche Mitteilungen / Universität Paderborn
Probles (Microdiaparsis) caudiculatus Khalaim 2007
Creators: name: Khalaim, Andrey
name: Sheng, Mao-Ling
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Probles
Probles caudiculatus

description: Probles (Microdiaparsis) caudiculatus Khalaim, 2007 Distribution. Transpalaearctic species: Europe, Caucasus, Russian Siberia and Far East, Mongolia, China (Ningxia, 35°24’ N, 106°23’ E, 1820 m).
description: Published as part of Khalaim, Andrey & Sheng, Mao-Ling, 2009, Review of Tersilochinae (Hymenoptera, Ichneumonidae) of China, with descriptions of four new species, pp. 67-81 in ZooKeys 14 (14) on page 75, DOI: 10.3897/zookeys.14.141, http://zenodo.org/record/576472
description: {"references": ["Khalaim AI (2007) 17. Subfamily Tersilochinae. In: Key to the insects of Russian Far East. Vol. IV. Neuropteroidea, Mecoptera, Hymenoptera. Pt 5. Vladivostok: Dal'nauka, 566 - 597. [In Russian]."]}
Simple Stringy Dynamical SUSY Breaking
Creators: name: Aharony, Ofer
name: Kachru, Shamit
name: Silverstein, Eva
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present simple string models which dynamically break supersymmetry without non-Abelian gauge dynamics. The Fayet model, the Polonyi model, and the O'Raifeartaigh model each arise from D-branes at a specific type of singularity. D-brane instanton effects generate the requisite exponentially small scale of supersymmetry breaking.
description: 12 pages, 6 figures, harvmac. v2: minor corrections
Building counterexamples to generalizations for rational functions of Ritt's decomposition theorem
Creators: name: Gutierrez, Jaime
name: Sevilla, David
Publisher: name: arXiv
Year: 2008
Subjects: subject: Commutative Algebra (math.AC)
subject: Symbolic Computation (cs.SC)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 12Y05; 13P99; 68W30

description: The classical Ritt's Theorems state several properties of univariate polynomial decomposition. In this paper we present new counterexamples to Ritt's first theorem, which states the equality of length of decomposition chains of a polynomial, in the case of rational functions. Namely, we provide an explicit example of a rational function with coefficients in Q and two decompositions of different length. Another aspect is the use of some techniques that could allow for other counterexamples, namely, relating groups and decompositions and using the fact that the alternating group A_4 has two subgroup chains of different lengths; and we provide more information about the generalizations of another property of polynomial decomposition: the stability of the base field. We also present an algorithm for computing the fixing group of a rational function providing the complexity over Q.
description: 17 pages
Lagrangian subcategories and braided tensor equivalences of twisted quantum doubles of finite groups
Creators: name: Naidu, Deepak
name: Nikshych, Dmitri
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: We classify Lagrangian subcategories of the representation category of a twisted quantum double of a finite group. In view of results of 0704.0195v2 this gives a complete description of all braided tensor equivalent pairs of twisted quantum doubles of finite groups. We also establish a canonical bijection between Lagrangian subcategories of the representation category of a twisted quantum double of a finite group G and module categories over the category of twisted G-graded vector spaces such that the dual tensor category is pointed. This can be viewed as a quantum version of V. Drinfeld's characterization of homogeneous spaces of a Poisson-Lie group in terms of Lagrangian subalgebras of the double of its Lie bialgebra. As a consequence, we obtain that two group-theoretical fusion categories are weakly Morita equivalent if and only if their centers are equivalent as braided tensor categories.
description: 26 pages; several comments and references added
title: Besondere Bestimmungen der Prüfungsordnung für den Masterstudiengang Kultur und Gesellschaft für das Fach Deutschsprachige Literaturen der Fakultät für Kulturwissenschaften an der Universität Paderborn
title: vom 11. Juni 2019
titleType: Subtitle
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2019

description: Amtliche Mitteilungen / Universität Paderborn
Characterisation of Silicon Photomultiplier Detectors for their Application in Very-High-Energy Astrophysics.
Creators: name: Duara, Angaraj
Publisher: name: University of Leicester
Year: 2021
Subjects: Uncategorized

description: A novel method has been developed in this thesis to characterise silicon photomultiplier (SiPM) detectors for their application in very high energy astrophysics. This method includes a novel technique to digitally shape and filter SiPM pulses, that allows the extraction of a clean SiPM pulse. A transfer function has been developed using the Laplace Transform in the s-plane on the equivalent electrical circuit model of an SiPM. This transfer function allows easy extraction of all the electrical parameters of an SiPM. This method has then been used to investigate four novel SiPMs for their primary application in the Compact High Energy Camera (CHEC-S) designed for the upcoming next generation ground based gamma ray observatory Cherenkov Telescope Array (CTA). Another novel technique has been developed to investigate the thermal response of an SiPM. This method accurately probes the junction temperature of an SiPM when it is exposed to varying levels of night sky background (NSB). Finally, a simulation called Toy Model has been developed to simulate the impact of SiPM parameters such as pulse shape and gain on the trigger level, efficiency and resolution of CHEC-S.
Thermal Radiation Equilibrium: (Nonrelativistic) Classical Mechanics versus (Relativistic) Classical Electrodynamics
Creators: name: Boyer, Timothy H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Physics (physics.class-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Energy equipartition is appropriate only for nonrelativistic classical mechanics, but has only limited relevance for a relativistic theory such as classical electrodynamics. In this article, we discuss harmonic-oscillator thermal equilibrium from three different perspectives. First, we contrast the thermal equilibrium of nonrelativistic mechanical oscillators (where point collisions are allowed and frequency is irrelevant) with the equilibrium of relativistic radiation modes (where frequency is crucial). The Rayleigh-Jeans law appears from applying a dipole-radiation approximation to impose the nonrelativistic mechanical equilibrium on the radiation spectrum. In this discussion, we note the possibility of zero-point energy for relativistic radiation, which possibility does not arise for nonrelativistic classical-mechanical systems. Second, we turn to a simple electromagnetic model of a harmonic oscillator and show that the oscillator is fully in radiation equilibrium (which involves all radiation multipoles, dipole, quadrupole, etc.) with classical electromagnetic zero-point radiation, but is not in equilibrium with the Rayleigh-Jeans spectrum. Finally, we discuss the contrast between the flexibility of nonrelativistic mechanics with its arbitrary potential functions allowing separate scalings for length, time, and energy, with the sharply-controlled behavior of relativistic classical electrodynamics with its single scaling connecting together the scales for length, time, and energy. It is emphasized that within classical physics, energy-sharing, velocity-dependent damping is associated with the low-frequency, nonrelativistic part of the Planck thermal radiation spectrum, whereas acceleration-dependent radiation damping is associated with the high-frequency adiabatically-invariant and Lorentz-invariant part of the spectrum corresponding to zero-point radiation.
description: 31 pages
A semi-automatic approach to protocol implementation : the ISO class 2 Transport protocol as an example
Creators: name: Lau, Allen Chakming
Publisher: name: University of British Columbia
Year: 2010

description: Formal Description Techniques (FDTs) for specifying communication protocols, and the adopted FDT standards such as Estelle have opened a new door for the possibility of automating the implementation of a complex communication protocol directly from its specification. After a brief overview of Estelle FDT, we present the basic ideas and the encountered problems in developing a C-written Estelle compiler, which accepts an Estelle specification of protocols and produces a protocol implementation in C. The practicality of this tool — the Estelle compiler — has been examined via a semi-automatic implementation of the ISO class 2 Transport Protocol using the tool. A manual implementation in C/UNIX 4.2bsd of this protocol is also performed and compared with the semi-automatic implementation. We find the semi-automatic approach to protocol implementation offers several advantages over the conventional manual one. These advantages include correctness and modularity in protocol implementation code and reduction in implementation development time. In this thesis, we discuss our experience on using the semi-automatic approach in implementing the ISO class 2 Transport Protocol.
title: Besondere Bestimmungen der Prüfungsordnung für den Masterstudiengang "Kultur und Gesellschaft" für das Fach Digital Humanities der Fakultät für Kulturwissenschaften an der Universität Paderborn
title: vom 11. Juni 2019
titleType: Subtitle
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2019

description: Amtliche Mitteilungen / Universität Paderborn
Joint Routing and Charging Problem of Multiple Electric Vehicles: A Fast Optimization Algorithm
Creators: name: Yao, Canqi
name: Chen, Shibo
name: Yang, Zaiyue
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Logistics has gained great attentions with the prosperous development of commerce, which is often seen as the classic optimal vehicle routing problem. Meanwhile, electric vehicle (EV) has been widely used in logistic fleet to curb the emission of green house gases in recent years. Solving the optimization problem of joint routing and charging of multiple EVs is in a urgent need, whose objective function includes charging time, charging cost, EVs travel time, usage fees of EV and revenue from serving customers. This joint problem is formulated as a mixed integer programming (MIP) problem, which, however, is NP-hard due to integer restrictions and bilinear terms from the coupling between routing and charging decisions. The main contribution of this paper lies at proposing an efficient two stage algorithm that can decompose the original MIP problem into two linear programming (LP) problems, by exploiting the exactness of LP relaxation and eliminating the coupled term. This algorithm can achieve a nearoptimal solution in polynomial time. In addition, another variant algorithm is proposed based on the two stage one, to further improve the quality of solution.
description: Accepted by IEEE Transactions on Intelligent Transportation Systems, DOI: 10.1109/TITS.2021.3076601
On the connection between magnetic interactions and the spin-wave gap of the insulating phase of NaOsO$_{3}$
Creators: name: Ntallis, Nikolaos
name: Borisov, Vladislav
name: Kvashnin, Yaroslav O.
name: Thonig, Danny
name: Sjöqvist, Erik
name: Bergman, Anders
name: Delin, Anna
name: Eriksson, Olle
name: Pereiro, Manuel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The scenario of a metal-insulator transition driven by the onset of antiferromagnetic order in NaOsO$_3$ calls for a trustworthy derivation of the underlying effective spin Hamiltonian. To determine the latter we rely on {\it ab initio} electronic-structure calculations, linear spin-wave theory, and comparison to experimental data of the corresponding magnon spectrum. We arrive this way to Heisenberg couplings that are $\lesssim$45\% to$\lesssim$63\% smaller than values presently proposed in the literature and Dzyaloshinskii-Moriya interactions in the region of 15\% of the Heisenberg exchange $J$. These couplings together with the symmetric anisotropic exchange interaction and single-ion magnetocrystalline anisotropy successfully reproduce the magnon dispersion obtained by resonant inelastic X-ray scattering measurements. In particular, the spin-wave gap fully agrees with the measured one. We find that the spin-wave gap is defined from a subtle interplay between the single-ion anisotropy, the Dzyaloshinskii-Moriya exchange and the symmetric anisotropic exchange interactions. The results reported here underpin the local-moment description of NaOsO$_3$, when it comes to analyzing the magnetic excitation spectra. Interestingly, this comes about from a microscopic theory that describes the electron system as Bloch states, adjusted to a mean-field solution to Hubbard-like interactions.
description: 7 pages, 6 figures
Persistent currents in one dimension: the other side of Leggett's theorem
Creators: name: Waintal, Xavier
name: Fleury, Genevieve
name: Kazymyrenko, Kyryl
name: Houzet, Manuel
name: Schmitteckert, Peter
name: Weinmann, Dietmar
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We discuss the sign of the persistent current of N electrons in one dimensional rings. Using a topology argument, we establish lower bounds for the free energy in the presence of arbitrary electron-electron interactions and external potentials. Those bounds are the counterparts of upper bounds derived by Leggett. Rings with odd (even) numbers of polarized electrons are always diamagnetic (paramagnetic). We show that unpolarized electrons with N being a multiple of four exhibit either paramagnetic behavior or a superconductor-like current-phase relation.
description: 4 pages, 4 figures
Validating module network learning algorithms using simulated data
Creators: name: Michoel, Tom
name: Maere, Steven
name: Bonnet, Eric
name: Joshi, Anagha
name: Saeys, Yvan
name: Bulcke, Tim Van den
name: Van Leemput, Koenraad
name: van Remortel, Piet
name: Kuiper, Martin
name: Marchal, Kathleen
name: Van de Peer, Yves
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences

description: In recent years, several authors have used probabilistic graphical models to learn expression modules and their regulatory programs from gene expression data. Here, we demonstrate the use of the synthetic data generator SynTReN for the purpose of testing and comparing module network learning algorithms. We introduce a software package for learning module networks, called LeMoNe, which incorporates a novel strategy for learning regulatory programs. Novelties include the use of a bottom-up Bayesian hierarchical clustering to construct the regulatory programs, and the use of a conditional entropy measure to assign regulators to the regulation program nodes. Using SynTReN data, we test the performance of LeMoNe in a completely controlled situation and assess the effect of the methodological changes we made with respect to an existing software package, namely Genomica. Additionally, we assess the effect of various parameters, such as the size of the data set and the amount of noise, on the inference performance. Overall, application of Genomica and LeMoNe to simulated data sets gave comparable results. However, LeMoNe offers some advantages, one of them being that the learning process is considerably faster for larger data sets. Additionally, we show that the location of the regulators in the LeMoNe regulation programs and their conditional entropy may be used to prioritize regulators for functional validation, and that the combination of the bottom-up clustering strategy with the conditional entropy-based assignment of regulators improves the handling of missing or hidden regulators.
description: 13 pages, 6 figures + 2 pages, 2 figures supplementary information
Model and solution strategy for placement of rectangular blocks in the Euclidian plane
Creators: name: Alon, Ami
Publisher: name: University of British Columbia
Year: 2010

description: This thesis describes a nonlinear optimization model for the placement of rectangular blocks with some wire connections among them in the Euclidian plane, such that the total wire length is minimized. Such a placement algorithm is useful as a CAD tool for VLSI and PCB layout designs. In contrast to some previous placement techniques, the mathematical model presented here ensures that the blocks will not overlap, and minimizes the sum of the distances of the interconnections of the blocks with respect to their orientation as well as their position. We also present mechanisms for solving more restrictive placement problems: one in which there is a set of equally spaced, discrete angles to be used in the placement, and one in which the blocks have to be assigned into predefined slots. The mathematical model is based on the Lennard-Jones 6-12 potential equation, on a sine wave shaped penalty function, and on minimizing the sum of the squares of the Euclidian distances of the block interconnections. We implement and embed our optimization routines in an interactive graphic block editor. We also present some experimental results which show that near optimal placements are achieved with our techniques.
Virtual Manufacturing : Tools for improving Design and Production
Creators: name: Dépincé, Philippe
name: Chablat, Damien
name: Woelk, Peer-Oliver
Publisher: name: arXiv
Year: 2007
Subjects: subject: Robotics (cs.RO)
subject: Classical Physics (physics.class-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The research area "Virtual Manufacturing" can be defined as an integrated manufacturing environment which can enhance one or several levels of decision and control in manufacturing process. Several domains can be addressed: Product and Process Design, Process and Production Planning, Machine Tool, Robot and Manufacturing System. As automation technologies such as CAD/CAM have substantially shortened the time required to design products, Virtual Manufacturing will have a similar effect on the manufacturing phase thanks to the modelling, simulation and optimisation of the product and the processes involved in its fabrication.
title: Verónica :
title: Directrices para la ejecución del examen de la distinción, la homogeneidad y la estabilidad.
titleType: Subtitle
Creators: name: International Union For The Protection Of New Varieties Of Plants,
Publisher: name: International Union for the Protection of New Varieties of Plants,
Year: 0
Subjects: Plants
New Varieties of Plants
Hebe

description: La finalidad de estas directrices (“directrices de examen”) es elaborar los principios que figuran en la Introducción General (documento TG/1/3) y sus documentos TGP conexos, con objeto de que sirvan de orientación práctica y detallada para el examen armonizado de la distinción, homogeneidad y estabilidad (DHE) y en particular, para identificar los caracteres apropiados para el examen DHE y producir descripciones armonizadas de variedades.
On the role of the final state interactions in rare B-decays
Creators: name: Kaidalov, A. B.
name: Vysotsky, M. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The effects of final state interactions (FSI) in hadronic B-decays are investigated. The model for FSI, based on Regge phenomenology of high-energy hadronic interactions is proposed. It is shown that this model explains the pattern of phases in matrix elements of $B\toππ$ and $B\toρρ$ decays. These phases play an important role for CP-violation in B-decays. The most precise determination of the unitarity triangle angle $α$ from $B_d\to ρπ$ decays is performed. The relation between CP-asymmetries in $B\to Kπ$ decays is discussed. It is emphasized that the large distance FSI can explain the structure of polarizations of the vector mesons in B-decays and other puzzles like a very large branching ratio of the B-decay to $\barΞ_cΛ_c$.
description: 19 pages
Orbital degeneracy removed by charge order in triangular antiferromagnet AgNiO2
Creators: name: Wawrzynska, E.
name: Coldea, R.
name: Wheeler, E. M.
name: Mazin, I. I.
name: Johannes, M. D.
name: Sorgel, T.
name: Jansen, M.
name: Ibberson, R. M.
name: Radaelli, P. G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report a high-resolution neutron diffraction study on the orbitally-degenerate spin-1/2 hexagonal antiferromagnet AgNiO2. A structural transition to a tripled unit cell with expanded and contracted NiO6 octahedra indicates root(3) x root(3) charge order on the Ni triangular lattice. This suggests charge order as a possible mechanism of lifting the orbital degeneracy in the presence of charge fluctuations, as an alternative to Jahn-Teller distortions. A novel magnetic ground state is observed at base temperatures with the electron-rich S = 1 Ni sites arranged in alternating ferromagnetic rows on a triangular lattice, surrounded by a honeycomb network of non-magnetic and metallic Ni ions. We also report first-principles band-structure calculations that explain microscopically the origin of these phenomena.
description: 4 pages including 4 eps figures, improved Fig 4, to appear in Physical Review Letters
Production of a chiral magnetic anomaly with emerging turbulence and mean-field dynamo action
Creators: name: Schober, Jennifer
name: Rogachevskii, Igor
name: Brandenburg, Axel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: In relativistic magnetized plasmas, asymmetry in the number densities of left- and right-handed fermions, i.e., a non-zero chiral chemical potential mu_5, leads to an electric current along the magnetic field. This causes a chiral dynamo instability for a uniform mu_5, but our simulations reveal a dynamo even for fluctuating mu_5 with zero mean. It produces magnetically-dominated turbulence and generates mean magnetic fields via the magnetic alpha effect. Eventually, a universal scale-invariant k^(-1) spectrum of mu_5 and a k^(-3) magnetic spectrum are formed independently of the initial condition.
description: 6 pages, 4 figures, published in Phys. Rev. Lett
Stochastic resonance and heat fluctuations in a driven double-well system
Creators: name: Sahoo, Mamata
name: Saikia, Shantu
name: Mahato, Mangal C.
name: Jayannavar, A. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study a periodically driven (symmetric as well as asymmetric)double-well potential system at finite temperature. We show that mean heat loss by the system to the environment(bath) per period of the applied field is a good quantifier of stochastic resonance. It is found that the heat fluctuations over a single period are always larger than the work fluctuations. The observed distributions of work and heat exhibit pronounced asymmetry near resonance. The heat losses over a large number of periods satisfies the conventional steady-state fluctuation theorem, though different relation exists for this quantity.
description: modified version, 10 figures
Statistical correlations of an anyon liquid at low temperatures
Creators: name: Pellegrino, F. M. D.
name: Angilella, G. G. N.
name: March, N. H.
name: Pucci, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Using a proposed generalization of the pair distribution function for a gas of non-interacting particles obeying fractional exclusion statistics in arbitrary dimensionality, we derive the statistical correlations in the asymptotic limit of vanishing or low temperature. While Friedel-like oscillations are present in nearly all non-bosonic cases at T=0, they are characterized by exponential damping at low temperature. We discuss the dependence of these features on dimensionality and on the value of the statistical parameter alpha.
description: to appear in Phys. Chem. Liquids
Injection of Inner Oort Cloud Objects Into the Distant Kuiper Belt by Planet Nine
Creators: name: Batygin, Konstantin
name: Brown, Michael E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The outer solar system exhibits an anomalous pattern of orbital clustering, characterized by an approximate alignment of the apsidal lines and angular momentum vectors of distant, long-term stable Kuiper belt objects. One explanation for this dynamical confinement is the existence of a yet-undetected planetary-mass object, "Planet Nine (P9)". Previous work has shown that trans-Neptunian objects, which originate within the scattered disk population of the Kuiper belt, can be corralled into orbital alignment by Planet Nine's gravity over ~Gyr timescales, and characteristic P9 parameters have been derived by matching the properties of a synthetic Kuiper belt generated within numerical simulations to the available observational data. In this work, we show that an additional dynamical process is in play within the framework of the Planet Nine hypothesis, and demonstrate that P9-induced dynamical evolution facilitates orbital variations within the otherwise dynamically frozen inner Oort cloud. As a result of this evolution, inner Oort cloud bodies can acquire orbits characteristic of the distant scattered disk, implying that if Planet Nine exists, the observed census of long-period trans-Neptunian objects is comprised of a mixture of Oort cloud and Kuiper belt objects. Our simulations further show that although inward-injected inner Oort cloud objects exhibit P9-driven orbital confinement, the degree of clustering is weaker than that of objects originating within the Kuiper belt. Cumulatively, our results suggest that a more eccentric Planet Nine is likely necessary to explain the data than previously thought.
description: 11 pages, 1 figures, accepted for publication in ApJL
Dynamo instabilities in plasmas with inhomogeneous chiral chemical potential
Creators: name: Schober, Jennifer
name: Rogachevskii, Igor
name: Brandenburg, Axel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study the dynamics of magnetic fields in chiral magnetohydrodynamics, which takes into account the effects of an additional electric current related to the chiral magnetic effect in high energy plasmas. We perform direct numerical simulations, considering weak seed magnetic fields and inhomogeneities of the chiral chemical potential mu_5 with a zero mean. We demonstrate that a small-scale chiral dynamo can occur in such plasmas if fluctuations of mu_5 are correlated on length scales that are much larger than the scale on which the dynamo growth rate reaches its maximum. Magnetic fluctuations grow by many orders of magnitude due to the small-scale chiral dynamo instability. Once the nonlinear backreaction of the generated magnetic field on fluctuations of mu_5 sets in, the ratio of these scales decreases and the dynamo saturates. When magnetic fluctuations grow sufficiently to drive turbulence via the Lorentz force before reaching maximum field strength, an additional mean-field dynamo phase is identified. The mean magnetic field grows on a scale that is larger than the integral scale of turbulence after the amplification of the fluctuating component saturates. The growth rate of the mean magnetic field is caused by a magnetic alpha effect that is proportional to the current helicity. With the onset of turbulence, the power spectrum of mu_5 develops a universal k^(-1) scaling independently of its initial shape, while the magnetic energy spectrum approaches a k^(-3) scaling.
description: 22 pages, 22 figures
Hyperspherical harmonics with arbitrary arguments
Creators: name: Meremianin, A. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The derivation scheme for hyperspherical harmonics (HSH) with arbitrary arguments is proposed. It is demonstrated that HSH can be presented as the product of HSH corresponding to spaces with lower dimensionality multiplied by the orthogonal (Jacobi or Gegenbauer) polynomial. The relation of HSH to quantum few-body problems is discussed. The explicit expressions for orthonormal HSH in spaces with dimensions from 2 to 6 are given. The important particular cases of four- and six-dimensional spaces are analyzed in detail and explicit expressions for HSH are given for several choices of hyperangles. In the six-dimensional space, HSH representing the kinetic energy operator corresponding to i) the three-body problem in physical space and ii) four-body planar problem are derived.
description: 18 pages, 1 figure
Lattice-switch Monte Carlo for binary hard-sphere crystals
Creators: name: Jackson, A. N.
name: Ackland, G. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show how to generalize the Lattice Switch Monte Carlo method to calculate the phase diagram of a binary system. A global coordinate transformation is combined with a modification of particle diameters, enabling the multi-component system in question to be explored and directly compared to a suitable reference state in a single Monte Carlo simulation. We use the method to evaluate the free energies of binary hard sphere crystals. Calculations at moderate size ratios, α=0.58 and α=0.73, are in agreement with previous results, and confirm AB2 and AB13 as stable structures. We also find that the AB(CsCl) structure is not entropically stable at the size ratio and volume at which it has been reported experimentally, and therefore that those observations cannot be explained by packing effects alone.
description: 14 pages, 9 figures
Probles (Microdiaparsis) temulentus Khalaim 2007
Creators: name: Khalaim, Andrey
name: Sheng, Mao-Ling
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Probles
Probles temulentus

description: Probles (Microdiaparsis) temulentus Khalaim, 2007 Distribution. China (Qunghai, 33°35’ N, 96°20’).
description: Published as part of Khalaim, Andrey & Sheng, Mao-Ling, 2009, Review of Tersilochinae (Hymenoptera, Ichneumonidae) of China, with descriptions of four new species, pp. 67-81 in ZooKeys 14 (14) on page 75, DOI: 10.3897/zookeys.14.141, http://zenodo.org/record/576472
description: {"references": ["Khalaim AI (2007) 17. Subfamily Tersilochinae. In: Key to the insects of Russian Far East. Vol. IV. Neuropteroidea, Mecoptera, Hymenoptera. Pt 5. Vladivostok: Dal'nauka, 566 - 597. [In Russian]."]}
Spectral flow is the integral of one forms on the Banach manifold of self adjoint Fredholm operators
Creators: name: Carey, Alan
name: Potapov, Denis
name: Sukochev, Fyodor
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics

description: One may trace the idea that spectral flow should be given as the integral of a one form back to the 1974 Vancouver ICM address of I.M. Singer. Our main theorem gives analytic formulae for the spectral flow along a norm differentiable path of self-adjoint bounded Breuer-Fredholm operators in a semi-finite von Neumann algebra. These formulae have a geometric interpretation which derives from the proof. Namely we define a family of Banach submanifolds of all bounded self-adjoint Breuer-Fredholm operators and on each submanifold define global one forms whose integral on a norm differentiable path contained in the submanifold calculates the spectral flow along this path. We emphasise that our methods do not give a single globally defined one form on the self adjoint Breuer- Fredholms whose integral along all paths is spectral flow rather, as the choice of the plural `forms' in the title suggests, we need a family of such one forms in order to confirm Singer's idea. The original context for this result concerned paths of unbounded self-adjoint Fredholm operators. We therefore prove analogous formulae for spectral flow in the unbounded case as well. The proof is a synthesis of key contributions by previous authors, whom we acknowledge in detail in the introduction, combined with an additional important recent advance in the differential calculus of functions of non-commuting operators.
description: Some additional explanations and corrections are introduced
Evidence of local effects in anomalous refraction and focusing properties of dodecagonal photonic quasicrystals
Creators: name: Di Gennaro, Emiliano
name: Miletto, Carlo
name: Savo, Salvatore
name: Andreone, Antonello
name: Morello, Davide
name: Galdi, Vincenzo
name: Castaldi, Giuseppe
name: Pierro, Vincenzo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present the key results from a comprehensive study of the refraction and focusing properties of a two-dimensional dodecagonal photonic ``quasicrystal'' (PQC), carried out via both full-wave numerical simulations and microwave measurements on a slab made of alumina rods inserted in a parallel-plate waveguide. We observe anomalous refraction and focusing in several frequency regions, confirming some recently published results. However, our interpretation, based on numerical and experimental evidence, differs substantially from the one in terms of ``effective negative refractive-index'' that was originally proposed. Instead, our study highlights the critical role played by short-range interactions associated with local order and symmetry.
description: 4 pages, 5 figures, accepted on Physical Review B as Brief Report
Gravitational $SL(2,\mathbb{R})$ Algebra on the Light Cone
Creators: name: Wieland, Wolfgang
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In a region with a boundary, the gravitational phase space consists of radiative modes in the interior and edge modes at the boundary. Such edge modes are necessary to explain how the region couples to its environment. In this paper, we characterise the edge modes and radiative modes on a null surface for the tetradic Palatini--Holst action. Our starting point is the definition of the action and its boundary terms. We choose the least restrictive boundary conditions possible. The fixed boundary data consists of the radiative modes alone (two degrees of freedom per point). All other boundary fields are dynamical. We introduce the covariant phase space and explain how the Holst term alters the boundary symmetries. To infer the Poisson brackets among Dirac observables, we define an auxiliary phase space, where the $SL(2\mathbb{R})$ symmetries of the boundary fields is manifest. We identify the gauge generators and second-class constraints that remove the auxiliary variables. All gauge generators are at most quadratic in the fundamental $SL(2,\mathbb{R})$ variables on phase space. We compute the Dirac bracket and identify the Dirac observables on the light cone. Finally, we discuss various truncations to quantise the system in an effective way.
description: 29 pages
CATEGORY OF CONCEPT IN LINGUOCULTUROLOGY: HISTORY OF DEVELOPMENT, STRUCTURE, CLASSIFICATION
Creators: name: Obidova, Guzalkhon
Publisher: name: Zenodo
Year: 2023

description: The article is devoted to a description of the concept of “concept” in cultural linguistics, a comprehensive review and detailed analysis of the history of the study of concepts in linguistic science. Presenting the concept as a basic concept of linguoculturology is the main goal of this article, which is achieved by describing the history of development, analyzing the main directions in the study and research of the structure of the concept.
Updating the Phase Diagram of the Gross-Neveu Model in 2+1 Dimensions
Creators: name: Kneur, Jean-Loic
name: Pinto, Marcus Benghi
name: Ramos, Rudnei O.
name: Staudt, Ederson
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The method of optimized perturbation theory (OPT) is used to study the phase diagram of the massless Gross-Neveu model in 2+1 dimensions. In the temperature and chemical potential plane, our results give strong support to the existence of a tricritical point and line of first order phase transition, previously only suspected to exist from extensive lattice Monte Carlo simulations. In addition of presenting these results we discuss how the OPT can be implemented in conjunction with the Landau expansion in order to determine all the relevant critical quantities.
description: 7 pages, 2 eps figures. Replaced with the version that matches the published one (PLB)
title: Besondere Bestimmungen der Prüfungsordnung für den Masterstudiengang Kultur und Gesellschaft für das Fach Englischsprachige Literatur und Kultur der Fakultät für Kulturwissenschaften an der Universität Paderborn
title: vom 11. Juni 2019
titleType: Subtitle
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2019

description: Amtliche Mitteilungen / Universität Paderborn
Probles (Rugodiaparsis)
Creators: name: Khalaim, Andrey
name: Sheng, Mao-Ling
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Probles

description: Probles (Rugodiaparsis) sp. Material examined. China, Ningxia Hui Autonomous Region, Liupanshan, 35°24’ N, 106°23’ E, 1820 m, 21.VII.2005, coll. M.-L. Sheng, 1 ♁. First record of subgenus from China.
description: Published as part of Khalaim, Andrey & Sheng, Mao-Ling, 2009, Review of Tersilochinae (Hymenoptera, Ichneumonidae) of China, with descriptions of four new species, pp. 67-81 in ZooKeys 14 (14) on page 75, DOI: 10.3897/zookeys.14.141, http://zenodo.org/record/576472
title: Besondere Bestimmungen der Prüfungsordnung für den Masterstudiengang Kultur und Gesellschaft für das Fach Englische Sprachwissenschaft der Fakultät für Kulturwissenschaften an der Universität Paderborn
title: vom 11. Juni 2019
titleType: Subtitle
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2019

description: Amtliche Mitteilungen / Universität Paderborn
Orbital Evolution of an Accreting Millisecond Pulsar: Witnessing the Banquet of a Hidden Black Widow?
Creators: name: Di Salvo, T.
name: Burderi, L.
name: Riggio, A.
name: Papitto, A.
name: Menna, M. T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have performed a timing analysis of all the four X-ray outbursts from the accreting millisecond pulsar SAX J1808.4-3658 observed so far by the PCA on board RXTE. For each of the outbursts we derived the best-fit value of the time of ascending node passage. We find that these times follow a parabolic trend, which gives an orbital period derivative $\dot P_{\rm orb} = (3.40 \pm 0.18) \times 10^{-12}$ s/s, and a refined estimate of the orbital period, $P_{\rm orb} = 7249.156499 \pm 1.8 \times 10^{-5}$ s (reference epoch $T_0 = 50914.8099$ MJD). This derivative is positive, suggesting a degenerate or fully convective companion star, but is more than one order of magnitude higher than what is expected from secular evolution driven by angular momentum losses caused by gravitational radiation under the hypothesis of conservative mass transfer. Using simple considerations on the angular momentum of the system, we propose an explanation of this puzzling result assuming that during X-ray quiescence the source is ejecting matter (and angular momentum) from the inner Lagrangian point. We have also verified that this behavior is in agreement with a possible secular evolution of the system under the hypothesis of highly non-conservative mass transfer. In this case, we find stringent constraints on the masses of the two components of the binary system and its inclination. The proposed orbital evolution indicates that in this kind of sources the neutron star is capable to efficiently ablate the companion star, suggesting that this kind of objects are part of the population of the so-called black widow pulsars, still visible in X-rays during transient mass accretion episodes.
description: Replaced with the revised version accepted by MNRAS. Improved with a more extended discussion, conclusions unchanged
Reasoning with incomplete information : investigations of non-monotonic reasoning
Creators: name: Etherington, David William
Publisher: name: University of British Columbia
Year: 2010

description: Intelligent behaviour relies heavily on the ability to reason in the absence of complete information. Until recently, there has been little work done on developing a formal understanding of how such reasoning can be performed. We focus on two aspects of this problem: default or prototypical reasoning, and closed-world or circumscriptive reasoning. After surveying the work in the field, we concentrate on Reiter's default logic and the various circumscriptive formalisms developed by McCarthy and others. Taking a largely semantic approach, we develop and/or extend model-theoretic semantics for the formalisms in question. These and other tools are then used to chart the capabilities, limitations, and interrelationships of the various approaches. It is argued that the formal systems considered, while interesting in their own rights, have an important role as specification/evaluation tools vis-a-vis explicitly computational approaches. An application of these principles is given in the formalization of inheritance networks in the presence of exceptions, using default logic.