cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Scaling and Asymptotic Scaling in the SU(2) Gauge Theory
Creators: name: Fingberg, J.
name: Heller, U. M.
name: Karsch, F.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We determine the critical couplings for the deconfinement phase transition in $SU(2)$ gauge theory on $N_τ\times N_σ^3$ lattices with $N_τ= 8$ and 16 and $N_σ$ varying between 16 and 48. A comparison with string tension data shows scaling of the ratio $T_c / \sqrtσ$ in the entire coupling regime $β=2.30-2.75$, while the individual quantities still exhibit large scaling violations. We find $T_c / \sqrtσ=0.69(2)$. We also discuss in detail the extrapolation of $T_c / Lambda_{\rm{\bar{M} \bar{S}}}$ and $\sqrtσ / Lambda_{\rm{\bar{M}\bar{S}}}$ to the continuum limit. Our result, which is consistent with the above ratio, is $T_c / Lambda_{\rm{\bar{M}\bar{S}}} = 1.23(11)$ and $\sqrtσ / Lambda_{\rm{\bar{M}\bar{S}}} = 1.79(12)$. We also comment upon corresponding results for $SU(3)$ gauge theory and four flavour QCD.
description: 27 pages with 9 postscript figures included. Plain TeX file (needed macros are included). BI-TP 92-26, FSU-SCRI-92-103, HLRZ-92-39 (Quote of UKQCD string tension, and accordingly Figs. 5 and 7a, plus a few typo's corrected.)
Structural details of Al/Al2O3 junctions and their role in formation of electron tunnel barriers
Creators: name: Koberidze, M.
name: Puska, M. J.
name: Nieminen, R. M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a computational study of the adhesive and structural properties of the Al/Al2O3 interfaces as building blocks of the Metal-Insulator-Metal (MIM) tunnel devices, where electron transport is accomplished via tunnelling mechanism through the sandwiched insulating barrier. The main goal of this paper is to understand, on the atomic scale, the role of the geometrical details in the formation of the tunnel barrier profiles. To provide reliable results, we carefully assess the accuracy of the traditional methods used to examine Al/Al2O3 interfaces. These are the most widely employed exchange-correlation functionals, LDA, PBE and PW91, the Universal Binding Energy Relation (UBER) for predicting equilibrium interfacial distances and adhesion energies, and the ideal work of separation as a measure of junction stability. Finally, we perform a detailed analysis of the atomic and interplanar relaxations in each junction. Our results imply that the structural irregularities on the surface of the Al film have a significant contribution to lowering the tunnel barrier height, while interplanar relaxations in the Al film, away from the immediate interface do not have a notable impact on the tunnelling properties. On the other hand, up to 5-7 layers of Al2O3 may be involved in shaping the tunnel barriers. Interplanar relaxations of these layers depend on the geometry of the interface and may result in the net contraction by 13% relative to the corresponding thickness in the bulk oxide. This is a significant amount as the tunnelling probability depends exponentially on the barrier width.
description: 13 pages, 5 figures
Testimony, House Financial Services Committee
Creators: name: Meltzer, Allan
Publisher: name: Carnegie Mellon University
Year: 1970
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: Last year the New York Times ran several articles about the end of capitalism. Others picked up the theme and reinforced it with claims that greedy bankers and deregulated financial markets had brought the world to the brink of another Great Depression. Allegedly we were saved by timely, forceful, and intelligent government actions. And the next phase had to be more government regulation of financial and economic life. Unbelievable! Certainly there were many mistakes in the financial sector and a massive response by the Federal Reserve. Left out is the government’s disastrous mortgage and housing policy. Without the policies followed by Fannie Mae, Freddie Mac, and the destructive changes in government housing and mortgage policies, the crisis would not have happened. Also, without warning, a 30-year policy changed when Lehman Brothers failed, followed by a hesitant and uncertain lead from Treasury Secretary Paulson. These actions converted a garden-variety recession into a world-wide crisis. The Federal Reserve acted forcefully and determinedly to lessen the fallout from its Lehman error, but much damage was done. Let’s not overlook government failure. Let’s try to prevent more of the same.
The Weinberg Angle Without Grand Unification
Creators: name: Moroi, T.
name: Murayama, Hitoshi
name: Yanagida, T.
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We assume that strong and electroweak interactions become strong at very high energies. With this assumption, we compute the low-energy gauge coupling constants $α_i (m_Z)$ as a function of the cutoff scale, taking the supersymmetric standard model with $3+2n$ families of quark and lepton multiplets. We find that only the five family case $(n=1)$ is consistent with the experimental values of the gauge coupling constants. This suggests the presence of a pair of families at $\sim 1$~TeV.
description: 8 pages, TU-438
Superconductivity in electron-doped arsenene
Creators: name: Kong, Xin
name: Gao, Miao
name: Yan, Xun-Wang
name: Lu, Zhong-Yi
name: Xiang, Tao
Publisher: name: arXiv
Year: 2018
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Based on the first-principles density functional theory electronic structure calculation, we investigate the possible phonon-mediated superconductivity in arsenene, a two-dimensional buckled arsenic atomic sheet, under electron doping. We find that the strong superconducting pairing interaction results mainly from the $p_z$-like electrons of arsenic atoms and the $A_1$ phonon mode around the $K$ point, and the superconducting transition temperature can be as high as 30.8 K in the arsenene with 0.2 doped electrons per unit cell and 12\% applied biaxial tensile strain. This transition temperature is about ten times higher than that in the bulk arsenic under high pressure. It is also the highest transition temperature that is predicted for electron-doped two-dimensional elemental superconductors, including graphene, silicene, phosphorene, and borophene.
description: 8 pages, 9 figures
Semiclassical resolvent estimates for bounded potentials
Creators: name: Klopp, Frédéric
name: Vogel, Martin
Publisher: name: arXiv
Year: 2018
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We study the cut-off resolvent of semiclassical Schr{ö}dinger operators on $\mathbb{R}^d$ with bounded compactly supported potentials $V$. We prove that for real energies $λ^2$ in a compact interval in $\mathbb{R}_+$ and for any smooth cut-off function $χ$ supported in a ball near the support of the potential $V$, for some constant $C>0$, one has \begin{equation*} \| χ(-h^2Δ+ V-λ^2)^{-1} χ\|_{L^2\to H^1} \leq C \,\mathrm{e}^{Ch^{-4/3}\log \frac{1}{h} }. \end{equation*} This bound shows in particular an upper bound on the imaginary parts of the resonances $λ$, defined as a pole of the meromorphic continuation of the resolvent $(-h^2Δ+ V-λ^2)^{-1}$ as an operator $L^2_{\mathrm{comp}}\to H^2_{\mathrm{loc}}$: any resonance $λ$ with real part in a compact interval away from $0$ has imaginary part at most \begin{equation*} \mathrm{Im} λ\leq - C^{-1} \,\mathrm{e}^{Ch^{-4/3}\log \frac{1}{h} }. \end{equation*} This is related to a conjecture by Landis: The principal Carleman estimate in our proof provides as well a lower bound on the decay rate of $L^2$ solutions $u$ to $-Δu = Vu$ with $0\not\equiv V\in L^{\infty}(\mathbb{R}^d)$. We show that there exist a constant $M>0$ such that for any such $u$, for $R>0$ sufficiently large, one has \begin{equation*} \int_{B(0,R+1)\backslash \overline{B(0,R)}}|u(x)|^2 dx \geq M^{-1}R^{-4/3} \mathrm{e}^{-M \|V\|_{\infty}^{2/3} R^{4/3}}\|u\|^2_2. \end{equation*}
description: 21 pages
Ted Balbach: In Memoriam
Creators: name: Meltzer, Allan
Publisher: name: Carnegie Mellon University
Year: 2018
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: Ted Balbach was my friend and fellow worker in the small cohort that worked to improve monetary policy in the 1970s. As most of you know, Ted came to the United States after World War II. He managed to survive the war and the vicious murders known as the final solution
Fitting a quart into a pint pot at the Sir John Soane's Museum in London: A new library management and conservation survey tool for historic libraries
Creators: name: Martin, Aurélie
name: Pickwoad, Nicholas
name: Velios, Athanasios
Publisher: name: Zenodo
Year: 2016
Subjects: book conservation survey
digital tool
bookbinding descriptions
historic libraries
re-shelving

description: This paper describes the survey of the Library of Sir John Soane Museum in London and the creation of a digital tool to assess the condition of the books and facilitate their re-organisation within the original shelving. This project comprises the types of issues often encountered in historic buildings: very few unused spaces available for re-shelving the books, a complex architectural plan, historic shelving of many different sizes and types of construction with variable environmental conditions and a collection on public view, thus allowing for few aesthetic changes in terms of boxes and re-organisation.
 The digital tool allows to automate the re-organisation of the books, thus limiting unnecessary handling of the objects. It was designed using an open-source software (the MySQL relational database with the phpMyAdmin tool as a frontend) but could work with any relational database. Additionally, the database allows to easily extract standard reports such as cost estimates for conservation treatments or enclosures projects, as well as binding information if a more historical report is required. This tool can be used by historic libraries with similar criteria and restrictions as those encountered in Soane's library.
NMR Time Reversal as a Probe of Incipient Turbulent Spin Dynamics
Creators: name: Hayden, Michael E.
name: Baudin, Emmanuel
name: Tastevin, Geneviève
name: Nacher, Pierre-Jean
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We demonstrate time reversal of nuclear spin dynamics in highly magnetized dilute liquid 3He-4He mixtures through effective inversion of long-range dipolar interactions. These experiments, which involve using magic sandwich NMR pulse sequences to generate spin echoes, probe the spatiotemporal development of turbulent spin dynamics and promise to serve as a versatile tool for the study and control of dynamic magnetization instabilities. We also show that a repeated magic sandwich pulse sequence can be used to dynamically stabilize modes of nuclear precession that are otherwise intrinsically unstable. To date, we have extended the effective precession lifetimes of our magnetized samples by more than three orders of magnitude.
Gauge invariant extremization on the lattice
Creators: name: van der Sijs, A. J.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Recently, a method was proposed and tested to find saddle points of the action in simulations of non-abelian lattice gauge theory. The idea, called `extremization', is to minimize $\int(\dl S/\dl A_μ)^2$. The method was implemented in an explicitly gauge variant way, however, and gauge dependence showed up in the results. Here we show how extremization can be formulated in a way that preserves gauge invariance on the lattice. The method applies to any gauge group and any lattice action. The procedure is worked out in detail for the standard plaquette action with gauge groups U(1) and SU(N).
description: 7 pages, LaTeX, Oxford preprint OUTP-92-16P
NMR Time Reversal Experiments in Highly Polarised Liquid 3He-4He Mixtures
Creators: name: Baudin, Emmanuel
name: Hayden, Michael E.
name: Tastevin, Geneviève
name: Nacher, Pierre-Jean
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Long-range magnetic interactions in highly magnetised liquids (laser-polarised 3He-4He dilute mixtures at 1 K in our experiment) introduce a significant non-linear and non-local contribution to the evolution of nuclear magnetisation that leads to instabilities during free precession. We recently demonstrated that a multi-echo NMR sequence, based on the magic sandwich pulse scheme developed for solid-state NMR, can be used to stabilise the magnetisation against the effect of distant dipolar fields. Here, we report investigations of echo attenuation in an applied field gradient that show the potential of this NMR sequence for spin diffusion measurements at high magnetisation densities.
description: Accepted for publication in the Journal of Low Temperature Physics
Non-perturbative unification in the light of LEP results
Creators: name: Brahmachari, B.
name: Sarkar, U.
name: Sridhar, K.
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider an alternative to conventional GUTs originally proposed by Maiani, Parisi and Petronzio, where owing to the existence of extra fermion generations at some intermediate scale, the gauge couplings become large at high energies. We first comment on how the non- supersymmetric version of this scenario is ruled out; we then consider the two-loop evolution of the couplings in the supersymmetric extension of this scenario, and check whether such a scenario is feasible in the light of the precies values of couplings now available from LEP.
description: Latex file 7 pages+1 fig. (ps file appended after the latex file), CERN-TH.6913/93
Noncomputability Arising In Dynamical Triangulation Model Of Four-Dimensional Quantum Gravity
Creators: name: Nabutovsky, A.
name: Ben-Av, R.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Computations in Dynamical Triangulation Models of Four-Dimensional Quantum Gravity involve weighted averaging over sets of all distinct triangulations of compact four-dimensional manifolds. In order to be able to perform such computations one needs an algorithm which for any given $N$ and a given compact four-dimensional manifold $M$ constructs all possible triangulations of $M$ with $\leq N$ simplices. Our first result is that such algorithm does not exist. Then we discuss recursion-theoretic limitations of any algorithm designed to perform approximate calculations of sums over all possible triangulations of a compact four-dimensional manifold.
description: 8 Pages, LaTex, PUPT-1327
Spectroscopic study of native defects in the semiconductor to metal phase transition in V2O5 nanostructure
Creators: name: Basu, Raktima
name: Dhara, Sandip
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Vanadium is a transition metal with multiple oxidation states and V2O5 is the most stable form among them. Besides catalysis, chemical sensing and photo-chromatic applications, V2O5 is also reported to exhibit a semiconductor to metal transition (SMT) at a temperature range of 530-560K. Even though, there are debates in using the term 'SMT' for V2O5, the metallic behavior above transition temperature and its origin are of great interests in the scientific community. In this study, V2O5 nanostructures were deposited on SiO2/Si substrate by vapour transport method using Au as catalyst. Temperature dependent electrical measurement confirms the SMT in V2O5 without any structural change. Temperature dependent photoluminescence analysis proves the appearance of oxygen vacancy related peaks due to reduction of V2O5 above the transition temperature, as also inferred from temperature dependent Raman spectroscopic studies. The newly evolved defect levels in the V2O5 electronic structure with increasing temperature is also understood from the downward shift of the bottom most split-off conduction bands due to breakdown of pdπ bonds leading to metallic behavior in V2O5 above the transition temperature.
Gravitational settling of 22Ne and white dwarf evolution
Creators: name: García--Berro, E.
name: Althaus, L. G.
name: Córsico, A. H.
name: Isern, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the effects of the sedimentation of the trace element 22Ne in the cooling of white dwarfs. In contrast with previous studies, which adopted a simplified treatment of the effects of 22Ne sedimentation, this is done self-consistently for the first time, using an up-to-date stellar evolutionary code in which the diffusion equation is coupled with the full set of equations of stellar evolution. Due the large neutron excess of 22Ne, this isotope rapidly sediments in the interior of the white dwarf. Although we explore a wide range of parameters, we find that using the most reasonable assumptions concerning the diffusion coefficient and the physical state of the white dwarf interior the delay introduced by the ensuing chemical differentation is minor for a typical 0.6 Msun white dwarf. For more massive white dwarfs, say M_Wd about 1.0 Msun, the delay turns out to be considerably larger. These results are in qualitatively good accord with those obtained in previous studies, but we find that the magnitude of the delay introduced by 22Ne sedimentation was underestimated by a factor of about 2. We also perform a preliminary study of the impact of 22Ne sedimentation on the white dwarf luminosity function. Finally, we hypothesize as well on the possibility of detecting the sedimentation of 22Ne using pulsating white dwarfs in the appropriate effective temperature range with accurately determined rates of change of the observed periods.
description: To apper in The Astrophysical Journal
The role of spin in the calculation of Hubbard $U$ and Hund's $J$ parameters from first principles
Creators: name: Linscott, Edward B.
name: Cole, Daniel J.
name: Payne, Michael C.
name: O'Regan, David D.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The density functional theory (DFT)+$U$ method is a pragmatic and effective approach for calculating the ground-state properties of strongly-correlated systems, and linear response calculations are widely used to determine the requisite Hubbard parameters from first principles. We provide a detailed treatment of spin within this linear response approach, demonstrating that the conventional Hubbard $U$ formula, unlike the conventional DFT+$U$ corrective functional, incorporates interactions that are off-diagonal in the spin indices and places greater weight on one spin channel over the other. We construct alternative definitions for Hubbard and Hund's parameters that are consistent with the contemporary DFT+$U$ functional, expanding upon the minimum-tracking linear response method. This approach allows Hund's $J$ and spin-dependent $U$ parameters to be calculated with the same ease as for the standard Hubbard $U$. Our methods accurately reproduce the experimental band gap, local magnetic moments, and the valence band edge character of manganese oxide, a canonical strongly-correlated system. We also apply our approach to a complete series of transition-metal complexes [M(H$_2$O)$_6$]$^{n+}$ (for M = Ti to Zn), showing that Hubbard corrections on oxygen atoms are necessary for preserving bond lengths, and demonstrating that our methods are numerically well-behaved even for near-filled subspaces such as in zinc. However, spectroscopic properties appear beyond the reach of the standard DFT+$U$ approach. Collectively, these results shed new light on the role of spin in the calculation of the corrective parameters $U$ and $J$, and point the way towards avenues for further development of DFT+$U$-type methods.
description: 19 pages, 10 figures, 8 tables
Introduction to the MODULAIR-PM
Creators: name: Hagan, David H.
name: Cross, Eben S.
Publisher: name: Zenodo
Year: 2022
Subjects: particulate matter, air quality

description: The MODULAIR-PM is a professional-grade particulate matter sensor manufactured by QuantAQ, Inc. (Somerville, MA USA). This application note describes its general operating principle and data corrections.
Higgs Bosons: Intermediate Mass Range at e+e- Colliders
Creators: name: Barger, V.
name: Cheung, K.
name: Djouadi, A.
name: Kniehl, B. A.
name: Zerwas, P. M.
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We elaborate on the production of the Standard Model Higgs particle at high-energy $e^+e^-$ colliders through the reaction $e^+e^- \rightarrow ZH$. Particular emphasis is put on the intermediate mass range. In addition to the signal we discuss in detail the background processes. Angular distributions which are sensitive to the spin and parity of the Higgs particle are analyzed.
description: Standard Latex. 15 pages. 11 figures available by fax or regular mail. MAD/PH/749, DESY 93-064, UdeM-LPN-TH-93-143, NUHEP-TH-93-12
Phase Transitions in the Pseudospin-Electron Model
Creators: name: Stasyuk, Ihor
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A review of the present state of investigations of the pseudospin-electron model (PEM), which is used in the theory of strongly correlated electron systems, is given. The model is used to describe the systems with the locally anharmonic elements of structure represented in the model by pseudospins. The consideration is based on the dynamical mean field theory approach and the generalized random phase approximation. Electron spectrum and thermodynamics of the model are investigated; the cases of the simplified model, the model with strong interaction and the two-sublattice model are studied more in detail. The phase transitions into other uniform or modulated states as well as superconducting phases are described; the criteria of their realization are established. Based on this, the description of structural and dielectric (ferroelectric type) instabilities, phase separation and bistability phenomena is given. A comparison is made with the thermodynamics of the Falicov-Kimball model (which can be considered as a particular case of PEM). The possibility of applying the PEM to the analysis of thermodynamics of the real HTSC systems is discussed. Attention is paid to the unsolved problems in the study of PEM.
title: ADCO, Cartulaire de l'abbaye de Cîteaux dit Cartulare Antiquum t.3 (2e moitié XIIIe siècle), Cart. 168 (11 H 66), f. 0121v
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2010
name: Petot, Frédéric
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: cartulaire
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge

description: Cartulaire de l'abbaye de Cîteaux dit Cartulare Antiquum t.3 (2e moitié XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 168 (11 H 66), f. 0121v, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de l'abbaye de Cîteaux dit Cartulare Antiquum t.3 (2e moitié XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 168 (11 H 66), f. 0121v, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
Technology Deployment Decisions in the Natural Gas Industry
Creators: name: Enders, Paul
name: Wolf, Alan
name: Secomandi, Nicola
Publisher: name: Carnegie Mellon University
Year: 2006
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: Since natural gas reserves in North America and Europe are declining, energy companies there can no longer create value by just drilling more wells; they must create value by better managing their current production assets, and by better leveraging technology. In this paper, we analyze the real option to pause production from a well (better management) along with the real option to scale production technology (leverage technology), within a model incorporating price and geological uncertainty.We use our model to generate insights through numerical experiments, using actual financial and well data provided by Equitable Resources. We find, surprisingly, that the often neglected option to pause production adds up to 5% to the value of a well. Furthermore, we find that technology scaling options add up to 65% through enhanced extraction technology, and almost 5% through improved communication technology. That is, we show that profits can be increased by managing for value, and not just by drilling more wells. In addition, our work provides insights into the optimal tactical management of a well when adjusting to changes in price, production rate, and seasonal cost factors. Our results extend to other natural resource extraction projects, such as mining and oil extraction, and may extend to other production processes such as farming and forestry.
A hierarchy of topological systems with completely positive entropy
Creators: name: Barbieri, Sebastián
name: García-Ramos, Felipe
Publisher: name: arXiv
Year: 2018
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37B40

description: We define a hierarchy of systems with topological completely positive entropy in the context of continuous countable amenable group actions on compact metric spaces. For each countable ordinal we construct a dynamical system on the corresponding level of the aforementioned hierarchy and provide subshifts of finite type for the first three levels. We give necessary and sufficient conditions for entropy pairs by means of the asymptotic relation on systems with the pseudo-orbit tracing property, and thus create a bridge between a result by Pavlov and a result by Meyerovitch. As a corollary, we answer negatively an open question by Pavlov regarding necessary conditions for completely positive entropy.
description: 26 pages and 11 gorgeous figures (new version fixes various typos and improves readability of figures in grayscale)
Enhancement of the spontaneous emission in subwavelength quasi-two-dimensional waveguides and resonators
Creators: name: Tokman, Mikhail
name: Long, Zhongqu
name: AlMutairi, Sultan
name: Wang, Yongrui
name: Belkin, Mikhail
name: Belyanin, Alexey
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We consider a quantum-electrodynamic problem of the spontaneous emission from a two-dimensional (2D) emitter, such as a quantum well or a 2D semiconductor, placed in a quasi-2D waveguide or cavity with subwavelength confinement in one direction. We apply the Heisenberg-Langevin approach which includes dissipation and fluctuations in the electron ensemble and in the electromagnetic field of a cavity on equal footing. The Langevin noise operators that we introduce do not depend on any particular model of dissipative reservoir and can be applied to any dissipation mechanism. Moreover, our approach is applicable to nonequilibrium electron systems, e.g. in the presence of pumping, beyond the applicability of the standard fluctuation-dissipation theorem. We derive analytic results for simple but practically important geometries: strip lines and rectangular cavities. Our results show that a significant enhancement of the spontaneous emission, by a factor of order 100 or higher, is possible for quantum wells and other 2D emitters in a subwavelength cavity.
description: 22 pages including Appendix and 2 figures
Technology and Organizations--An Individual Level Perspective
Creators: name: Goodman, Paul S.
name: Griffith, Terri L.
name: Fenner, Deborah B.
Publisher: name: Carnegie Mellon University
Year: 2004
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: The goal of this chapter is to expand our knowledge of the relationship between new technology and the individual in the organizational context, We explore both the impact of technology on the individual and the impact of the individual on technology Our key products will be a set of intellectual tools which should enhance research in this area
There is no Khintchine threshold for metric pair correlations
Creators: name: Aistleitner, Christoph
name: Lachmann, Thomas
name: Technau, Niclas
Publisher: name: arXiv
Year: 2018
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We consider sequences of the form $\left(a_{n} α\right)_{n}$ mod 1, where $α\in\left[0,1\right]$ and where $\left(a_{n}\right)_{n}$ is a strictly increasing sequence of positive integers. If the asymptotic distribution of the pair correlations of this sequence follows the Poissonian model for almost all $α$ in the sense of Lebesgue measure, we say that $(a_n)_n$ has the metric pair correlation property. Recent research has revealed a connection between the metric theory of pair correlations of such sequences, and the additive energy of truncations of $(a_n)_{n}$. Bloom, Chow, Gafni and Walker speculated that there might be a convergence/divergence criterion which fully characterises the metric pair correlation property in terms of the additive energy, similar to Khintchine's criterion in the metric theory of Diophantine approximation. In the present paper we give a negative answer to such speculations, by showing that such a criterion does not exist. To this end, we construct a sequence $(a_n)_n$ having large additive energy which, however, maintains the metric pair correlation property.
description: Version 1: 14 pages. Version 2: Several minor corrections. Version 3: Substantial revision. Improved quantitative results. Major modifications in the presentation of proofs. Included a subsection on the heuristics behind the proof. 17 pages. Version 4: Some further corrections. 17 pages
A Polyhedral Method for Sparse Systems with many Positive Solutions
Creators: name: Bihan, Frédéric
name: Santos, Francisco
name: Spaenlehauer, Pierre-Jean
Publisher: name: arXiv
Year: 2018
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We investigate a version of Viro's method for constructing polynomial systems with many positive solutions, based on regular triangulations of the Newton polytope of the system. The number of positive solutions obtained with our method is governed by the size of the largest positively decorable subcomplex of the triangulation. Here, positive decorability is a property that we introduce and which is dual to being a subcomplex of some regular triangulation. Using this duality, we produce large positively decorable subcomplexes of the boundary complexes of cyclic polytopes. As a byproduct we get new lower bounds, some of them being the best currently known, for the maximal number of positive solutions of polynomial systems with prescribed numbers of monomials and variables. We also study the asymptotics of these numbers and observe a log-concavity property.
Relaxation phenomena at criticality
Creators: name: Gambassi, Andrea
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The collective behaviour of statistical systems close to critical points is characterized by an extremely slow dynamics which, in the thermodynamic limit, eventually prevents them from relaxing to an equilibrium state after a change in the thermodynamic control parameters. The non-equilibrium evolution following this change displays some of the features typically observed in glassy materials, such as ageing, and it can be monitored via dynamic susceptibilities and correlation functions of the order parameter, the scaling behaviour of which is characterized by universal exponents, scaling functions, and amplitude ratios. This universality allows one to calculate these quantities in suitable simplified models and field-theoretical methods are a natural and viable approach for this analysis. In addition, if a statistical system is spatially confined, universal Casimir-like forces acting on the confining surfaces emerge and they build up in time when the temperature of the system is tuned to its critical value. We review here some of the theoretical results that have been obtained in recent years for universal quantities, such as the fluctuation-dissipation ratio, associated with the non-equilibrium critical dynamics, with particular focus on the Ising model with Glauber dynamics in the bulk. The non-equilibrium dynamics of the Casimir force acting in a film is discussed within the Gaussian model.
description: Talk delivered at Statphys23, Genova, Italy, July 9-13, 2007. 8 pages, 7 figures
Single cell and classic RNA sequencing – analysis and options for data integration
Creators: name: Pastuszak, Krzysztof
name: Supernat, Anna
name: Stokowy, Tomasz
Publisher: name: F1000 Research Limited
Year: 2019

description: Single cell RNA-sequencing (scRNA-Seq) allows for separation and quantitative analysis of gene expression from separated cells. The method allows for unprecedented resolution while compared to classic RNA sequencing. Unfortunately, computational analysis of scRNA-Seq is not standardized and requires further development.
First, we used Seurat normalization and cell clustering package to identify cell types and expression levels in the 10X Genomics dataset consisting of 5247 peripheral blood mononuclear cells. Next we compared the results to classic GTEx bulk RNA-Seq dataset, which includes expression patterns in whole blood cells from healthy individuals.

We compared expression of genes from 10x Genomics PBMC dataset [1] with two classic GTEx bulk RNA-Seq datasets, which included whole blood [2] and white blood [3] data, respectively.

We clustered cells from 10x Genomics dataset into 6 groups and precisely identified type of 3 of them (Fig. II), based on a list of canonical markers specific to particular cell types, e.g. CD14 and LYZ for CD14+ monocytes. Cell types of 3 clusters remained ambiguous and further biological interpretation is needed to interrogate cell clusters.
Gravitational waves from asymmetric oscillon dynamics?
Creators: name: Amin, Mustafa A.
name: Braden, Jonathan
name: Copeland, Edmund J.
name: Giblin, John T.
name: Solorio, Christian
name: Weiner, Zachary J.
name: Zhou, Shuang-Yong
Publisher: name: arXiv
Year: 2018
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: It has been recently suggested that oscillons produced in the early universe from certain asymmetric potentials continue to emit gravitational waves for a number of $e$-folds of expansion after their formation, leading to potentially detectable gravitational wave signals. We revisit this claim by conducting a convergence study using graphics processing unit (GPU)-accelerated lattice simulations and show that numerical errors accumulated with time are significant in low-resolution scenarios, or in scenarios where the run-time causes the resolution to drop below the relevant scales in the problem. Our study determines that the dominant, growing high frequency peak of the gravitational wave signals in the fiducial "hill-top model" in [arXiv:1607.01314] is a numerical artifact. This finding prompts the need for a more careful analysis of the numerical validity of other similar results related to gravitational waves from oscillon dynamics.
description: v2: 6 pages, 2 figures; matches PRD version
Technology and Group Performance
Creators: name: Goodman, Paul S.
name: Leyden, Dennis Patrick
Publisher: name: Carnegie Mellon University
Year: 2005
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: This paper will examine the role of technology on group performance.. It presents a new way to think about modeling group performance in organizations. The paper begins by examining some current approaches to modeling work group effectiveness. The next section identifies some of the basic concepts and assumptions underlying our approach to group effectiveness. Then an empirical question is posed which concerns the extent to which changes in group membership affect group performance.. A data set on coal mining crews is used to illustrate how our' technological approach would be utilized in examining work group performance and the effect of changes in work group membership on performance. It should be clear from these introductory remarks that our focus is on permanent groups in an organization that produce goods and services.
Using $b$-Tagging to Detect $t\anti t$~Higgs Production with Higgs$\rta b\anti b$
Creators: name: Dai, J.
name: Gunion, J. F.
name: Vega, R.
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We demonstrate that expected efficiencies and purities for $b$-tagging at SSC/LHC detectors may allow detection of the Standard Model Higgs in $t\anti t \hsm$ production, with $\hsm\rta b\anti b$ decay, for $80\lsim\mhsm\lsim 130\gev$, provided $\mt\gsim 130\gev$.
description: 11 pages, uses phyzzx.tex and tables.tex macros, full postscript file, including embedded figures, available via anonymous ftp at ucdhep.ucdavis.edu as [anonymous.gunion]hbb_sm.ps, Higgs branching ratios corrected to larger values, additional b-tagging and mis-identification scenarios studied, preprint UCD-93-18
Particle-without-Particle: a practical pseudospectral collocation method for linear partial differential equations with distributional sources
Creators: name: Oltean, Marius
name: Sopuerta, Carlos F.
name: Spallicci, Alessandro D. A. M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computational Physics (physics.comp-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Numerical Analysis (math.NA)
subject: Neurons and Cognition (q-bio.NC)
subject: Computational Finance (q-fin.CP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: FOS: Biological sciences
subject: FOS: Economics and business

description: Partial differential equations with distributional sources---in particular, involving (derivatives of) delta distributions---have become increasingly ubiquitous in numerous areas of physics and applied mathematics. It is often of considerable interest to obtain numerical solutions for such equations, but any singular ("particle"-like) source modeling invariably introduces nontrivial computational obstacles. A common method to circumvent these is through some form of delta function approximation procedure on the computational grid; however, this often carries significant limitations on the efficiency of the numerical convergence rates, or sometimes even the resolvability of the problem at all. In this paper, we present an alternative technique for tackling such equations which avoids the singular behavior entirely: the "Particle-without-Particle" method. Previously introduced in the context of the self-force problem in gravitational physics, the idea is to discretize the computational domain into two (or more) disjoint pseudospectral (Chebyshev-Lobatto) grids such that the "particle" is always at the interface between them; thus, one only needs to solve homogeneous equations in each domain, with the source effectively replaced by jump (boundary) conditions thereon. We prove here that this method yields solutions to any linear PDE the source of which is any linear combination of delta distributions and derivatives thereof supported on a one-dimensional subspace of the problem domain. We then implement it to numerically solve a variety of relevant PDEs: hyperbolic (with applications to neuroscience and acoustics), parabolic (with applications to finance), and elliptic. We generically obtain improved convergence rates relative to typical past implementations relying on delta function approximations.
description: 41 pages, 11 figures; v2: references and clarifications added (mostly in the introduction), matches the published version in Journal of Scientific Computing
The Hyperfine Splitting in Charmonium: Lattice Computations Using the Wilson and Clover Fermion Actions
Creators: name: UKQCD Collaboration
name: Allton, C. R.
name: Sachrajda, C. T.
name: Booth, S. P.
name: Bowler, K. C.
name: Henty, D. S.
name: Kenway, R. D.
name: Pendleton, B. J.
name: Richards, D. G.
name: Simone, J. N.
name: Simpson, A. D.
name: Michael, C.
name: Stephenson, P. W.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We compute the hyperfine splitting $m_{J/ψ}-m_{η_c}$ on the lattice, using both the Wilson and $O(a)$-improved (clover) actions for quenched quarks. The computations are performed on a $24^3\times48$ lattice at $β= 6.2$, using the same set of 18 gluon configurations for both fermion actions. We find that the splitting is 1.83\err{13}{15} times larger with the clover action than with the Wilson action, demonstrating the sensitivity of the spin-splitting to the magnetic moment term which is present in the clover action. However, even with the clover action the result is less than half of the physical mass-splitting. We also compute the decay constants $f_{η_c}$ and $f^{-1}_{J/ψ}$, both of which are considerably larger when computed using the clover action than with the Wilson action. For example for the ratio $f^{-1}_{J/ψ}/f^{-1}_ρ$ we find 0.32\err{1}{2} with the Wilson action and $0.48\pm 3$ with the clover action (the physical value is 0.44(2)).
description: LaTeX file, 8 pages and two postscript figures. Southampton Preprint: SHEP 91/92-27 Edinburgh Preprint: 92/510
title: ADCO, Cartulaire de Saint-Etienne de Dijon (XIIIe siècle), Cart. 34 (G 138), 22 folios, f. 0059
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2009
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Cartulaire de Saint-Etienne de Dijon (XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 34 (G 138), 22 folios, f. 0059, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de Saint-Etienne de Dijon (XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 34 (G 138), 22 folios, f. 0059, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye Saint-Étienne de Dijon
description: Provenance: http://www.wikidata.org/entity/Q15945019
The graphene/n-Ge(110) interface: structure, doping, and electronic properties
Creators: name: Tesch, Julia
name: Paschke, Fabian
name: Fonin, Mikhail
name: Wietstruk, Marko
name: Böttcher, Stefan
name: Koch, Roland J.
name: Bostwick, Aaron
name: Jozwiak, Chris
name: Rotenberg, Eli
name: Makarova, Anna
name: Paulus, Beate
name: Voloshina, Elena
name: Dedkov, Yuriy
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The implementation of graphene in semiconducting technology requires the precise knowledge about the graphene-semiconductor interface. In our work the structure and electronic properties of the graphene/$n$-Ge(110) interface are investigated on the local (nm) and macro (from $μ\mathrm{m}$ to mm) scales via a combination of different microscopic and spectroscopic surface science techniques accompanied by density functional theory calculations. The electronic structure of freestanding graphene remains almost completely intact in this system, with only a moderate $n$-doping indicating weak interaction between graphene and the Ge substrate. With regard to the optimization of graphene growth it is found that the substrate temperature is a crucial factor, which determines the graphene layer alignment on the Ge(110) substrate during its growth from the atomic carbon source. Moreover, our results demonstrate that the preparation routine for graphene on the doped semiconducting material ($n$-Ge) leads to the effective segregation of dopants at the interface between graphene and Ge(110). Furthermore, it is shown that these dopant atoms might form regular structures at the graphene/Ge interface and induce the doping of graphene. Our findings help to understand the interface properties of the graphene-semiconductor interfaces and the effect of dopants on the electronic structure of graphene in such systems.
description: submitted on 21.12.2017; manuscript and supplementary info
Technological Tying and the Intensity of Competition: An Empirical Analysis of the Video Game Industry
Creators: name: Derdenger, Timothy
Publisher: name: Carnegie Mellon University
Year: 2005
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: Using data from the 128 bit video game industry this paper evaluates the incentives for hardware firms to technologically tie their produced software to their own hardware as well as analyze the impact such an action has on the intensity of console price competition. Tying occurs when a console hardware manufacturer produces software which is incompatible with rival hardware. There are two important trade-offs an integrated firm faces when implementing a technological tie. The first is an effect that increases console market power and forces prices higher. The second, an effect due to the integration of the firm, drives prices lower. A counterfactual exercise determines technological tying of hardware and software increases console price competition and is due to console makers subsidizing consumer hardware purchases in order to increase video games sales, in particular their tied games, where the greatest proportion of industry profits are made. Moreover, I determine technological tying to be a dominant strategy for hardware manufacturers when software development costs are low.