cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Front Matter, Table of Contents, Preface, Conference Organization
Creators: name: Geary, Cody
name: Patitz, Matthew J.
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2020
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Conference Organization
subject: Theory of computation → Models of computation
subject: Applied computing → Molecular structural biology
subject: Applied computing → Biological networks
subject: Information systems → Information storage systems

description: Front Matter, Table of Contents, Preface, Conference Organization
description: LIPIcs, Vol. 174, 26th International Conference on DNA Computing and Molecular Programming (DNA 26), pages 0:i-0:xiv
Superstatistical distributions from a maximum entropy principle
Creators: name: Van der Straeten, Erik
name: Beck, Christian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We deal with a generalized statistical description of nonequilibrium complex systems based on least biased distributions given some prior information. A maximum entropy principle is introduced that allows for the determination of the distribution of the fluctuating intensive parameter $β$ of a superstatistical system, given certain constraints on the complex system under consideration. We apply the theory to three examples: The superstatistical quantum mechanical harmonic oscillator, the superstatistical classical ideal gas, and velocity time series as measured in a turbulent Taylor-Couette flow.
Higher-order topological insulator in cubic semiconductor quantum wells
Creators: name: Krishtopenko, Sergey S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The search for exotic new topological states of matter in widely accessible materials, for which the manufacturing process is mastered, is one of the major challenges of the current topological physics. Here we predict higher order topological insulator state in quantum wells based on the most common semiconducting materials. By successively deriving the bulk and boundary Hamiltonians, we theoretically prove the existence of topological corner states due to cubic symmetry in quantum wells with double band inversion. We show that the appearance of corner states does not depend solely on the crystallographic orientation of the meeting edges, but also on the growth orientation of the quantum well. Our theoretical results significantly extend the application potential of topological quantum wells based on IV, II-VI and III-V semiconductors with diamond or zinc-blende structures.
description: The main text and Supplementary Materials
The Ratio Monotonicity of the Boros-Moll Polynomials
Creators: name: Chen, William Y. C.
name: Xia, Ernest X. W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: In their study of a quartic integral, Boros and Moll discovered a special class of Jacobi polynomials, which we call the Boros-Moll polynomials. Kauers and Paule proved the conjecture of Moll that these polynomials are log-concave. In this paper, we show that the Boros-Moll polynomials possess the ratio monotone property which implies the log-concavity and the spiral property. We conclude with a conjecture which is stronger than Moll's conjecture on the $\infty$-log-concavity.
description: 14 pages, the final version, to appear in Mathematics of Computation
Early Universe cosmology in the light of the mirror dark matter interpretation of the DAMA/Libra signal
Creators: name: Ciarcelluti, Paolo
name: Foot, Robert
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Mirror dark matter provides a simple framework for which to explain the DAMA/Libra annual modulation signal consistently with the null results of the other direct detection experiments. The simplest possibility involves ordinary matter interacting with mirror dark matter via photon-mirror photon kinetic mixing of strength epsilon ~ 10^(-9). We confirm that photon-mirror photon mixing of this magnitude is consistent with constraints from ordinary Big Bang nucleosynthesis as well as the more stringent constraints from cosmic microwave background measurements and large scale structure considerations.
description: 9 pages, 1 figure; updated computations for T'(T), removed computation of Y'
title: Approximate Seeds of Strings
Creators: name: Christodoulakis, Manolis
name: Iliopoulos, Costas S.
name: Park, Kunsoo
name: Sim, Jeong Seop
Publisher: name: Institut für Informatik, Justus-Liebig-Universität Giessen
Year: 2005

description: In this paper we study approximate seeds of strings, that is, substrings of a given
string x that cover (by concatenations or overlaps) a superstring of $x$, under a variety
of distance rules (the Hamming distance, the edit distance, and the weighted edit
distance). We solve the smallest distance approximate seed problem and the restricted
smallest approximate seed problem in polynomial time and we prove that the general
smallest approximate seed problem is NP-complete.
description: Journal of Automata, Languages and Combinatorics, Volume 10, Numbers 5-6, 2005, 609-626
Dust rings as a footprint of planet formation in a protoplanetary disk
Creators: name: Kanagawa, Kazuhiro D.
name: Muto, Takayuki
name: Tanaka, Hidekazu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Relatively large dust grains (referred to as pebbles) accumulate at the outer edge of the gap induced by a planet in a protoplanetary disk, and a ring structure with a high dust-to-gas ratio can be formed. Such a ring has been thought to be located right outside of the planet orbit. We examined the evolution of the dust ring formed by a migrating planet, by performing two-fluid (gas and dust) hydrodynamic simulations. We found that the initial dust ring does not follow the migrating planet and remains at the initial location of the planet in the cases with a low viscosity of $α\sim 10^{-4}$. The initial ring is gradually deformed by viscous diffusion, and a new ring is formed in the vicinity of the migrating planet, which developes from the trap of the dust grains leaking from the initial ring. During this phase, two rings co-exist outside the planet orbit. This phase can continue over $\sim 1$~Myr for a planet migrating from 100~au. After the initial ring disappears, only the later ring remains. This change in the ring morphology can provide clues as to when and where the planet was formed, and is the footprint of the planet. We also carried out simulations with a mass-growing planet. These simulations show more complex asymmetric structures in the dust rings. The observed asymmetric structures in the protoplanetary disks may be related to a migrating and mass-growing planet.
description: Accepted for publication in ApJ, 24 pages, 20 figures
Band alignment effect in the topological photonic alloy
Creators: name: Qu, Tiantao
name: Wang, Mudi
name: Chen, Jun
name: Zhang, Lei
Publisher: name: arXiv
Year: 2024
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recently, a photonic alloy with non-trivial topological properties has been proposed, based on the random mixing of Yttrium Iron Garnet (YIG) and magnetized YIG rods. When the doping concentration of magnetized YIG rods is less than one, a chiral edge state (CES) of the topological photonic alloy appears in the frequency range of the non-trivial topological gap of the magnetized YIG crystal. In this work, we surprisingly find that by randomly mixing the Perfect Electric Conductor (PEC) and magnetized YIG rods in a square lattice, the photonic alloy system with appropriate doping concentrations can present CES in special frequency intervals even when both components support the propagation of bulk states. Analyzing the band structure of two components, we noticed a shift between the first trivial bandgap for PEC and the first topological bandgap for magnetized YIG. When calculating the transmission spectrum of the photonic alloy, we discovered that the frequency range for the topological gap gradually opens from the lower limit frequency of the bandgap for PEC to the bandgap for the magnetized YIG rods. The topological gap opening occurs as the doping concentration of magnetized YIG rods increases, creating an effective band alignment effect. Moreover, the topological gap for the photonic alloy is confirmed by calculating the reflection phase winding with the scattering method. Lastly, the gradual appearance of the CES is identified by applying Fourier transformation to real-space electromagnetic fields. Our work broadens the possibilities for flexible topological gap engineering in the photonic alloy system.
description: 8 pages, 5 figures
Euclidean Steiner shallow-light trees
Creators: name: Solomon, Shay
Publisher: name: Journal of Computational Geometry
Year: 2015

description: $\newcommand{\eps}{\epsilon}$A spanning tree that simultaneously approximates a shortest-path tree and a minimum spanning tree is called a shallow-light tree (shortly, SLT). More specifically, an $(\alpha,\beta)$-SLT of a weighted undirected graph $G = (V,E,w)$ with respect to a designated vertex $rt\in V$ is a spanning tree of $G$ with: (1) root-stretch $\alpha$ – it preserves all distances between $rt$ and the other vertices up to a factor of $\alpha$, and (2) lightness $\beta$ – it has weight at most $\beta$ times the weight of a minimum spanning tree $MST(G)$ of $G$. Tight tradeoffs between the parameters of SLTs were established by Awerbuch et al. in PODC'90 and by Khuller et al. in SODA'93. They showed that for any $\eps > 0$, any graph admits a $(1+\eps,O(\frac{1}{\eps}))$-SLT with respect to any root vertex, and complemented this result with a matching lower bound. Khuller et al. asked if the upper bound $\beta = O(\frac{1}{\eps})$ on the lightness of SLTs can be improved in Euclidean spaces. In FOCS'11 Elkin and this author gave a negative answer to this question, showing a lower bound of $\beta = \Omega(\frac{1}{\eps})$ that applies to 2-dimensional Euclidean spaces. In this paper we show that Steiner points lead to a quadratic improvement in Euclidean SLTs, by presenting a construction of Euclidean Steiner $(1+\eps,O(\sqrt{\frac{1}{\eps})})$-SLTs in arbitrary 2-dimensional Euclidean spaces. The lightness bound $\beta = O(\sqrt{\frac{1}{\eps}})$ of our construction is optimal up to a constant. The runtime of our construction, and thus the number of Steiner points used, are bounded by $O(n)$.
description: Journal of Computational Geometry, Vol. 6 No. 2 (2015): Special issue of Selected Papers from SoCG 2014
Schroedingers equation with gauge coupling derived from a continuity equation
Creators: name: Klein, U.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a statistical ensemble of particles of mass m, which can be described by a probability density ρand a probability current \vec{j} of the form ρ\nabla S/m. The continuity equation for ρand \vec{j} implies a first differential equation for the basic variables ρand S. We further assume that this system may be described by a linear differential equation for a complex state variable χ. Using this assumptions and the simplest possible Ansatz χ(ρ,S) Schroedingers equation for a particle of mass m in an external potential V(q,t) is deduced. All calculations are performed for a single spatial dimension (variable q) Using a second Ansatz χ(ρ,S,q,t) which allows for an explict q,t-dependence of χ, one obtains a generalized Schroedinger equation with an unusual external influence described by a time-dependent Planck constant. All other modifications of Schroeodingers equation obtained within this Ansatz may be eliminated by means of a gauge transformation. Thus, this second Ansatz may be considered as a generalized gauging procedure. Finally, making a third Ansatz, which allows for an non-unique external q,t-dependence of χ, one obtains Schroedingers equation with electromagnetic potentials \vec{A}, ϕin the familiar gauge coupling form. A possible source of the non-uniqueness is pointed out.
description: 25 pages, no figures
Topological Phase Transition in a Magnetic Weyl Semimetal
Creators: name: Liu, D. F.
name: Xu, Q. N.
name: Liu, E. K.
name: Shen, J. L.
name: Le, C. C.
name: Li, Y. W.
name: Pei, D.
name: Liang, A. J.
name: Dudin, P.
name: Kim, T. K.
name: Cacho, C.
name: Xu, Y. F.
name: Sun, Y.
name: Yang, L. X.
name: Liu, Z. K.
name: Felser, C.
name: Parkin, S. S. P.
name: Chen, Y. L.
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: Topological Weyl semimetals (TWSs) are exotic crystals possessing emergent relativistic Weyl fermions connected by unique surface Fermi-arcs (SFAs) in their electronic structures. To realize the TWS state, certain symmetry (such as the inversion or time reversal symmetry) must be broken, leading to a topological phase transition (TPT). Despite the great importance in understanding the formation of TWSs and their unusual properties, direct observation of such a TPT has been challenging. Here, using a recently discovered magnetic TWS Co3Sn2S2, we were able to systematically study its TPT with detailed temperature dependence of the electronic structures by angle-resolved photoemission spectroscopy. The TPT with drastic band structures evolution was clearly observed across the Curie temperature (TC = 177 K), including the disappearance of the characteristic SFAs and the recombination of the spin-split bands that leads to the annihilation of Weyl points with opposite chirality. These results not only reveal important insights on the interplay between the magnetism and band topology in TWSs, but also provide a new method to control their exotic physical properties.
description: 15 pages, 4 figures
New Dimensions for Randall-Sundrum Phenomenology
Creators: name: Davoudiasl, Hooman
name: Rizzo, Thomas G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a 6D extension of the Randall-Sundrum (RS) model, RS6, where the Standard Model (SM) gauge fields are allowed to propagate in an additional dimension, compactified on $S^1$ or $S^1/Z_2$. In a minimal scenario, fermions propagate in the 5D RS subspace and their localization provides a model of flavor. New Kaluza-Klein (KK) states, corresponding to excitations of the gauge fields along the 6th dimension, appear near the TeV scale. The new gauge KK modes behave differently from those in the 5D warped models. These RS6 states have couplings with strong dependence on 5D field localization and, within the SM, only interact with heavy fermions and the Higgs sector, to a very good approximation. Thus, the collider phenomenology of the new gauge KK states sensitively depends on the 5D fermion geography. We briefly discuss inclusion of SM fermions in all 6 dimensions, as well as the possibility of going beyond 6D.
description: 15 pages, 5 figures
Namen der Geschichte – Politik des Namens
Creators: name: Marchart, Oliver
Publisher: name: Österreichische Zeitschrift für Geschichtswissenschaften
Year: 2016

description: In this article, it is argued that Rancière’s theory of history should be located in the eld of political theory rather than historiography. To substantiate this claim, the historico-political function of naming (of the people) or self-naming (by the people), as presented by Rancière in the Names of History, is discussed and compared to the explicitly political role attributed to naming by Ernesto Laclau in On Populist Reason. It is argued that in both cases an inner dialectic can be observed between plebs and populus (or demos) which also gures in the theories of Giorgio Agamben and Alain Brossat. However, in Agamben and Brossat the plebs is presented in such messianic or insurrectionist terms that any connection to the world of real politics or to the category of the political is lost. On this account, Rancière’s and Laclau’s theories fare better, but, conversely, suffer from what can be described as a normative deficit. As a remedy, a post-foundational theory of democracy is proposed in which the ethical and the political are seen as two separate but intersecting dimensions of democracy.
description: Österreichische Zeitschrift für Geschichtswissenschaften, Bd. 27 Nr. 1 (2016): Apropos Rancière
An internal heating mechanism operating in ultra-short-period planets orbiting magnetically active stars
Creators: name: Lanza, A. F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A new mechanism for the internal heating of ultra-short-period planets is proposed based on the gravitational perturbation by a non-axisymmetric quadrupole moment of their host stars. Such a quadrupole is due to the magnetic flux tubes in the stellar convection zone, unevenly distributed in longitude and persisting for many stellar rotations as observed in young late-type stars. The rotation period of the host star evolves from its shortest value on the zero-age main sequence to longer periods due to the loss of angular momentum through a magnetized wind. If the stellar rotation period comes close to twice the orbital period of the planet, the quadrupole leads to a spin-orbit resonance that excites oscillations of the star-planet separation. As a consequence, a strong tidal dissipation is produced inside the planet. We illustrate the operation of the mechanism by modeling the evolution of the stellar rotation and of the innermost planetary orbit in the cases of CoRoT-7, Kepler-78, and K2-141 whose present orbital periods range between 0.28 and 0.85 days. If the spin-orbit resonance occurs, the maximum power dissipated inside the planets ranges between $10^{18}$ and $10^{19}$ W, while the total dissipated energy is of the order of $10^{30}-10^{32}$ J over a time interval as short as $(1-4.5) \times 10^{4}$ yr. Such a huge heating over a so short time interval produces a complete melting of the planetary interiors and may shut off their hydromagnetic dynamos. These may initiate a successive phase of intense internal heating owing to unipolar magnetic star-planet interactions and affect the composition and the escape of their atmospheres, producing effects that could be observable during the entire lifetime of the planets [abridged abstract].
description: 18 pages, 1 appendix, 9 figures, 3 tables; accepted by Astronomy & Astrophysics
Electron counting with a two-particle emitter
Creators: name: Splettstoesser, Janine
name: Ol'khovskaya, Sveta
name: Moskalets, Michael
name: Büttiker, Markus
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider two driven cavities (capacitors) connected in series via an edge state. The cavities are driven such that they emit an electron and a hole in each cycle. Depending on the phase lag the second cavity can effectively absorb the carriers emitted by the first cavity and nullify the total current or the set-up can be made to work as a two-particle emitter. We examine the precision with which the current can be nullified and with which the second cavity effectively counts the particles emitted by the first one. To achieve single-particle detection we examine pulsed cavities.
description: 5 pages, 3 figures, published in Phys. Rev. B
Modelling the economic effects of COVID-19 and possible green recovery plans: a post-Keynesian approach
Creators: name: Pollitt, Hector
name: Lewney, Richard
name: Kiss-Dobronyi, Bence
name: Lin, Xinru
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Only twelve years after the global financial crisis, in 2020 the world was again in economic crisis. This time around, the source of the crisis was the COVID-19 global pandemic, which has affected the economy differently than the global financial crisis. However, as they were in 2008–2009, conventional macroeconomic theory and models have once again been found wanting, and economists have again turned for insights to the work of Keynes and more recent post-Keynesian scholars. This paper explores a simulation of the macroeconomic impacts of COVID-19 using the E3ME macro-econometric model. It describes two potential recovery packages, one of which could be described as ‘green’. The modelling shows that the green recovery package could support the global economy and national labour markets through the recovery period, outperforming an equivalent conventional stimulus package while simultaneously reducing global CO2 emissions by 12%. A green recovery plan is assessed against a reference scenario with COVID-19. It outperforms a non-green recovery plan of comparable value, while also reducing CO2 emissions by up to 12% below the reference scenario (15% below no-COVID baseline).The policies in the green recovery plan provide different relative impacts. Car scrappage schemes that promote the uptake of electric vehicles have the largest impact on GDP and jobs. Renewables, energy efficiency and electric vehicle promotion all have large impacts on emissions.The green recovery plan boosts production levels in all sectors of the economy except for energy and utilities. It boosts the consumer services sector that has been most affected initially by the pandemic but also the investment sectors that could suffer longer-term damage. A green recovery plan is assessed against a reference scenario with COVID-19. It outperforms a non-green recovery plan of comparable value, while also reducing CO2 emissions by up to 12% below the reference scenario (15% below no-COVID baseline). The policies in the green recovery plan provide different relative impacts. Car scrappage schemes that promote the uptake of electric vehicles have the largest impact on GDP and jobs. Renewables, energy efficiency and electric vehicle promotion all have large impacts on emissions. The green recovery plan boosts production levels in all sectors of the economy except for energy and utilities. It boosts the consumer services sector that has been most affected initially by the pandemic but also the investment sectors that could suffer longer-term damage.
Hilltop Quintessence
Creators: name: Dutta, Sourish
name: Scherrer, Robert J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine hilltop quintessence models, in which the scalar field is rolling near a local maximum in the potential, and w is close to -1. We first derive a general equation for the evolution of the scalar field in the limit where w is close to -1. We solve this equation for the case of hilltop quintessence to derive w as a function of the scale factor; these solutions depend on the curvature of the potential near its maximum. Our general result is in excellent agreement (delta w < 0.5%) with all of the particular cases examined. It works particularly well (delta w < 0.1%) for the pseudo-Nambu-Goldstone Boson potential. Our expression for w(a) reduces to the previously-derived slow-roll result of Sen and Scherrer in the limit where the curvature goes to zero. Except for this limiting case, w(a) is poorly fit by linear evolution in a.
description: 7 pages, 9 figures, label on Fig. 4 corrected
Integer Cech Cohomology of Icosahedral Projection Tilings
Creators: name: Gähler, F.
name: Hunton, J.
name: Kellendonk, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: The integer Cech cohomology of canonical projection tilings of dimension three and codimension three is derived. These formulae are then evaluated for several icosahedral tilings known from the literature. Rather surprisingly, the cohomologies of all these tilings turn out to have torsion. This is the case even for the Danzer tiling, which is, in some sense, the simplest of all icosahedral tilings. This result is in contrast to the case of two-dimensional canonical projection tilings, where many examples without torsion are known.
The Sivashinsky equation for corrugated flames in the large-wrinkle limit
Creators: name: Joulin, Guy
name: Denet, Bruno
Publisher: name: arXiv
Year: 2008
Subjects: subject: Classical Physics (physics.class-ph)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Sivashinsky's (1977) nonlinear integro-differential equation for the shape of corrugated 1-dimensional flames is ultimately reducible to a 2N-body problem, involving the 2N complex poles of the flame slope. Thual, Frisch & Henon (1985) derived singular linear integral equations for the pole density in the limit of large steady wrinkles $(N \gg 1)$, which they solved exactly for monocoalesced periodic fronts of highest amplitude of wrinkling and approximately otherwise. Here we solve those analytically for isolated crests, next for monocoalesced then bicoalesced periodic flame patterns, whatever the (large-) amplitudes involved. We compare the analytically predicted pole densities and flame shapes to numerical results deduced from the pole-decomposition approach. Good agreement is obtained, even for moderately large Ns. The results are extended to give hints as to the dynamics of supplementary poles. Open problems are evoked.
Two-component galaxies with flat rotation curve
Creators: name: Ciotti, Luca
name: Morganti, Lucia
name: de Zeeuw, Tim
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Dynamical properties of two-component galaxy models whose stellar density distribution is described by a gamma-model while the total density distribution has a pure r^(-2) profile, are presented. The orbital structure of the stellar component is described by Osipkov-Merritt anisotropy, while the dark matter halo is isotropic. After a description of minimum halo models, the positivity of the phase-space density (the model consistency) is investigated, and necessary and sufficient conditions for consistency are obtained analytically as a function of the stellar inner density slope gamma and anisotropy radius. The explicit phase-space distribution function is recovered for integer values of gamma, and it is shown that while models with gamma>4/17 are consistent when the anisotropy radius is larger than a critical value (dependent on gamma), the gamma=0 models are unphysical even in the fully isotropic case. The Jeans equations for the stellar component are then solved analytically; in addition, the projected velocity dispersion at the center and at large radii are also obtained analytically for generic values of the anisotropy radius, and it is found that they are given by remarkably simple expressions. The presented models, even though highly idealized, can be useful as starting point for more advanced modeling of the mass distribution of elliptical galaxies in studies combining stellar dynamics and gravitational lensing.
description: 11 pages, 5 figures, accepted by MNRAS
Estimating total momentum at finite distances
Creators: name: Gallo, Emanuel
name: Lehner, Luis
name: Moreschi, Osvaldo
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the difficulties associated with the evaluation of the total Bondi momentum at finite distances around the central source of a general (asymptotically flat) spacetime. Since the total momentum is only rigorously defined at future null infinity, both finite distance and gauge effects must be taken into account for a correct computation of this quantity. Our discussion is applicable in general contexts but is particularly relevant in numerically constructed spacetimes for both extracting important physical information and assessing the accuracy of additional quantities.
description: 10 pages, 1 figure. Typos corrected. Comments added and a new Appendix. To be published in PRD
Chiral Effective Field Theory after Thirty Years: Nuclear Lattice Simulations
Creators: name: Lee, Dean
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The introduction of chiral effective field theory by Steven Weinberg three decades ago has had a profound and lasting impact on nuclear physics. This brief review explores the impact of Weinberg's work on the field of nuclear lattice simulations. Rather than a summary of technical details, an effort is made to present the conceptual advances that made much of the recent progress possible.
description: 12 pages, 2 figures, invited contribution to the special issue in Few-Body Systems "Celebrating 30 years of Steven Weinberg's papers on Nuclear Forces from Chiral Lagrangians"
Low-rank tensor recovery for Jacobian-based Volterra identification of parallel Wiener-Hammerstein systems
Creators: name: Usevich, Konstantin
name: Dreesen, Philippe
name: Ishteva, Mariya
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We consider the problem of identifying a parallel Wiener-Hammerstein structure from Volterra kernels. Methods based on Volterra kernels typically resort to coupled tensor decompositions of the kernels. However, in the case of parallel Wiener-Hammerstein systems, such methods require nontrivial constraints on the factors of the decompositions. In this paper, we propose an entirely different approach: by using special sampling (operating) points for the Jacobian of the nonlinear map from past inputs to the output, we can show that the Jacobian matrix becomes a linear projection of a tensor whose rank is equal to the number of branches. This representation allows us to solve the identification problem as a tensor recovery problem.
Asymptotic Entanglement Dynamics and Geometry of Quantum States
Creators: name: Drumond, Raphael Campos
name: Cunha, Marcelo de Oliveira Terra
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A given dynamics for a composite quantum system can exhibit several distinct properties for the asymptotic entanglement behavior, like entanglement sudden death, asymptotic death of entanglement, sudden birth of entanglement, etc. A classification of the possible situations was given in [M. O. Terra Cunha, {\emph{New J. Phys}} {\bf{9}}, 237 (2007)] but for some classes there were no known examples. In this work we give a better classification for the possibile relaxing dynamics at the light of the geometry of their set of asymptotic states and give explicit examples for all the classes. Although the classification is completely general, in the search of examples it is sufficient to use two qubits with dynamics given by differential equations in Lindblad form (some of them non-autonomous). We also investigate, in each case, the probabilities to find each possible behavior for random initial states.
description: 9 pages, 2 figures; revised version accepted for publication in J. Phys. A: Math. Theor
On Sequences with Non-Learnable Subsequences
Creators: name: V'yugin, Vladimir V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: F.4.1; I.2.6

description: The remarkable results of Foster and Vohra was a starting point for a series of papers which show that any sequence of outcomes can be learned (with no prior knowledge) using some universal randomized forecasting algorithm and forecast-dependent checking rules. We show that for the class of all computationally efficient outcome-forecast-based checking rules, this property is violated. Moreover, we present a probabilistic algorithm generating with probability close to one a sequence with a subsequence which simultaneously miscalibrates all partially weakly computable randomized forecasting algorithms. %subsequences non-learnable by each randomized algorithm. According to the Dawid's prequential framework we consider partial recursive randomized algorithms.
An Analysis and Implementation of the HDR+ Burst Denoising Method
Creators: name: Monod, Antoine
name: Delon, Julie
name: Veit, Thomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: I.4; F.2.1

description: HDR+ is an image processing pipeline presented by Google in 2016. At its core lies a denoising algorithm that uses a burst of raw images to produce a single higher quality image. Since it is designed as a versatile solution for smartphone cameras, it does not necessarily aim for the maximization of standard denoising metrics, but rather for the production of natural, visually pleasing images. In this article, we specifically discuss and analyze the HDR+ burst denoising algorithm architecture and the impact of its various parameters. With this publication, we provide an open source Python implementation of the algorithm, along with an interactive demo.
description: 28 pages, 15 figures, published at https://doi.org/10.5201/ipol.2021.336, code on https://github.com/amonod/hdrplus-python
Thermohaline mixing in low-mass giants
Creators: name: Cantiello, M.
name: Langer, N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Thermohaline mixing has recently been proposed to occur in low mass red giants, with large consequences for the chemical yields of low mass stars. We investigate the role of thermohaline mixing during the evolution of stars between 1Msun and 3Msun, in comparison to other mixing processes acting in these stars. We confirm that thermohaline mixing has the potential to destroy most of the ^3He which is produced earlier on the main sequence during the red giant stage. In our models we find that this process is working only in stars with initial mass M
description: 6 pages, conference proceedings IAU Symposium 252 (Sanya)
Rapid parameter estimation of a two-component neutron star model with spin wandering using a Kalman filter
Creators: name: Meyers, Patrick M.
name: O'Neill, Nicholas J.
name: Melatos, Andrew
name: Evans, Robin J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The classic, two-component, crust-superfluid model of a neutron star can be formulated as a noise-driven, linear dynamical system, in which the angular velocities of the crust and superfluid are tracked using a Kalman filter applied to electromagnetic pulse timing data and gravitational wave data, when available. Here it is shown how to combine the marginal likelihood of the Kalman filter and nested sampling to estimate full posterior distributions of the six model parameters, extending previous analyses based on a maximum-likelihood approach. The method is tested across an astrophysically plausible parameter domain using Monte Carlo simulations. It recovers the injected parameters to $\lesssim 10$ per cent for time series containing $\sim 10^3$ samples, typical of long-term pulsar timing campaigns. It runs efficiently in $\mathcal O(1)$ CPU-hr for data sets of the above size. In a present-day observational scenario, when electromagnetic data are available only, the method accurately estimates three parameters: the relaxation time, the ensemble-averaged spin-down of the system, and the amplitude of the stochastic torques applied to the crust. In a future observational scenario, where gravitational wave data are also available, the method also estimates the ratio between the moments of inertia of the crust and the superfluid, the amplitude of the stochastic torque applied to the superfluid, and the crust-superfluid lag. These empirical results are consistent with a formal identifiability analysis of the linear dynamical system.
description: 15 pages, 7 figures, accepted to MNRAS
Magnetotransport in non-planar SiGe/Si nanomembranes
Creators: name: Meyer, G. J.
name: Dias, N. L.
name: Blick, R. H.
name: Knezevic, I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate the relationship between electronics and geometry in a nonplanar SiGe/Si resonant quantum cavity (RQC) subject to a magnetic field. The transfer matrix technique originally due to Usuki and coworkers (Phys. Rev. B 52, 8244 1995) has been modified to account for the nonzero local curvature of the RQC. Our results demonstrate that low-temperature ballistic magnetoconductance in nonplanar RQCs is highly sensitive to the changes in curvature for a wide range of magnetic field strengths.
Bias dependence of magnetic exchange interactions: application to interlayer exchange coupling in spin valves
Creators: name: Haney, Paul M.
name: Heiliger, Christian
name: Stiles, Mark D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study how a bias voltage changes magnetic exchange interactions. We derive a general expression for magnetic exchange interactions for systems coupled to reservoirs under a bias potential, and apply it to spin valves. We find that for metallic systems, the interlayer exchange coupling shows a weak, oscillatory dependence on the bias potential. For tunneling systems, we find a quadratic dependence on the bias potential, and derive an approximate expression for this bias dependence for a toy model. We give general conditions for when the interlayer exchange coupling is a quadratic function of bias potential.
description: 10 pages, 8 figures
ПРОФИЛАКТИКА ИНСПЕКТОРИНИНГ МАҲАЛЛА ЁШЛАР ЕТАКЧИСИ ВА МАҲАЛЛА ЕТТИЛИГИ БИЛАН ЎЗАРО ҲАМКОРЛИГИНИ АҲАМИЯТИТ
Creators: name: Абдухалимов, Умар
name: Ниматов, Шерзод
Publisher: name: Zenodo
Year: 2025

description: Жамоат хавфсизлигини таъминлаш, ҳуқуқбузарликларнинг олдини олиш ва жиноятчиликка қарши курашишнинг яхлит тизимини шакллантириш, ички ишлар органларининг энг қуйи бўғинидан республика даражасигача самарали фаолиятини йўлга қўйиш ва замонавий иш услубларини жорий этиш орқали мамлакатимизда ҳуқуқ-тартибот ва қонунийликни мустаҳкамлаш, аҳолининг тинчлиги ва осойишталигини таъминлаш мақсадида бугунги кунда кўплаб ислоҳотлар амалга оширилмоқда.
On the Optimality of Backward Regression: Sparse Recovery and Subset Selection
Creators: name: Ament, Sebatian
name: Gomes, Carla
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Information Theory (cs.IT)
subject: Numerical Analysis (math.NA)
subject: Computation (stat.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Sparse recovery and subset selection are fundamental problems in varied communities, including signal processing, statistics and machine learning. Herein, we focus on an important greedy algorithm for these problems: Backward Stepwise Regression. We present novel guarantees for the algorithm, propose an efficient, numerically stable implementation, and put forth Stepwise Regression with Replacement (SRR), a new family of two-stage algorithms that employs both forward and backward steps for compressed sensing problems. Prior work on the backward algorithm has proven its optimality for the subset selection problem, provided the residual associated with the optimal solution is small enough. However, the existing bounds on the residual magnitude are NP-hard to compute. In contrast, our main theoretical result includes a bound that can be computed in polynomial time, depends chiefly on the smallest singular value of the matrix, and also extends to the method of magnitude pruning. In addition, we report numerical experiments highlighting crucial differences between forward and backward greedy algorithms and compare SRR against popular two-stage algorithms for compressed sensing. Remarkably, SRR algorithms generally maintain good sparse recovery performance on coherent dictionaries. Further, a particular SRR algorithm has an edge over Subspace Pursuit.
Velocity fluctuations of a piston confining a vibrated granular gas
Creators: name: Brey, J. Javier
name: Ruiz-Montero, M. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The steady state velocity fluctuations of a movable piston located on the top of a vibrated granular gas are studied by means of molecular dynamics simulations. From the second moment of the distribution, a temperature parameter for the piston is defined and compared with the granular temperature of the gas located just below it. Then the two temperature parameters refer to two interacting macroscopic systems. The equipartition of energy valid in usual molecular systems is strongly violated, and the temperature of the piston can be larger or smaller than the one of the gas, depending of the parameters defining the system at the particle level. The simulation results for the ratio of temperatures are in agreement with some theoretical predictions from kinetic theory assuming the validity of a hydrodynamic description in the limit of weak inelasticity of the gas.
Literarische Verarbeitungen der Deportation der krimtatarischen Bevölkerung
Creators: name: Czerwonnaja, Swetlana
name: Malek, Martin
Publisher: name: Österreichische Zeitschrift für Geschichtswissenschaften
Year: 2017

description: Österreichische Zeitschrift für Geschichtswissenschaften, Bd. 28 Nr. 1 (2017): Krimtataren
Glassy nematogenic properties induced by six-membered ring’s trimeric fluorinated Schiff base liquid crystals
Creators: name: Low, Mei-Ling
name: Ooi, Yew-Hong
name: Yeap, Guan-Yeow
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Science Policy
subject: Plant Biology
subject: 60506 Virology

description: New non-conventional Schiff base trimers composed of two fluorinated benzylideneaniline moieties connected to a halogen-substituted benzalideneaniline core at the ortho and para positions via octylene spacers were synthesized and characterized. The halogen X at the 4-position of the benzalideneaniline core includes F, Cl, Br and I. All the members exhibit enantiotropic nematic phase except for the compounds possessing fluorine and iodine substituents, which show only monotropic characteristics. A notable feature is that upon cooling the trimers vitrified to form the glassy state at low temperature. The Schlieren texture remains unchanged even it reaches the room temperature. This phenomenon resembles the one exhibited by glassy nematic liquid crystals and the enthalpy changes associated with the nematic to glass transition are unresolved due to the negligible value of heat change. The effect of different halogens towards the mesomorphic properties of the trimers was also described.
title: Front Matter, Table of Contents, Preface, Conference Organization
Creators: name: Bezem, Marc
name: Mahboubi, Assia
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2020
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Conference Organization
subject: Theory of computation → Type theory

description: Front Matter, Table of Contents, Preface, Conference Organization
description: LIPIcs, Vol. 175, 25th International Conference on Types for Proofs and Programs (TYPES 2019), pages 0:i-0:x
Magneto-Thermohaline Mixing in Red Giants
Creators: name: Denissenkov, Pavel A.
name: Pinsonneault, Marc
name: MacGregor, Keith B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We revise a magnetic buoyancy model that has recently been proposed as a mechanism for extra mixing in the radiative zones of low-mass red giants. The most important revision is our accounting of the heat exchange between rising magnetic flux rings and their surrounding medium. This increases the buoyant rising time by five orders of magnitude, therefore the number of magnetic flux rings participating in the mixing has to be increased correspondingly. On the other hand, our revised model takes advantage of the fact that the mean molecular weight of the rings formed in the vicinity of the hydrogen burning shell has been reduced by 3He burning. This increases their thermohaline buoyancy (hence, decreases the total ring number) considerably, making it equivalent to the pure magnetic buoyancy produced by a frozen-in toroidal field with B_phi ~ 10 MG. We emphasize that some toroidal field is still needed for the rings to remain cohesive while rising. Besides, this field prevents the horizontal turbulent diffusion from eroding the mu contrast between the rings and their surrounding medium. We propose that the necessary toroidal magnetic field is generated by differential rotation of the radiative zone, that stretches a pre-existing poloidal field around the rotation axis, and that magnetic flux rings are formed as a result of its buoyancy-related instability.
description: 31 pages, 4 figures, 2 tables, accepted by ApJ after minor changes
Electron mobility in silicon nanowires
Creators: name: Ramayya, E. B.
name: Vasileska, D.
name: Goodnick, S. M.
name: Knezevic, I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The low-field electron mobility in rectangular silicon nanowire (SiNW) transistors was computed using a self-consistent Poisson-Schrödinger-Monte Carlo solver. The behavior of the phonon-limited and surface-roughness-limited components of the mobility was investigated by decreasing the wire width from 30 nm to 8 nm, the width range capturing a crossover between two-dimensional (2D) and one-dimensional (1D) electron transport. The phonon-limited mobility, which characterizes transport at low and moderate transverse fields, is found to decrease with decreasing wire width due to an increase in the electron-phonon wavefunction overlap. In contrast, the mobility at very high transverse fields, which is limited by surface roughness scattering, increases with decreasing wire width due to volume inversion. The importance of acoustic phonon confinement is also discussed briefly.