cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Stringy Instanton Partition Function
Creators: name: Bonelli, Giulio
name: Sciarappa, Antonio
name: Tanzini, Alessandro
name: Vasko, Petr
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We perform an exact computation of the gauged linear sigma model associated to a D1-D5 brane system on a resolved A_1 singularity. This is accomplished via supersymmetric localization on the blown-up two-sphere. We show that in the blow-down limit C^2/Z_2 the partition function reduces to the Nekrasov partition function evaluating the equivariant volume of the instanton moduli space. For finite radius we obtain a tower of world-sheet instanton corrections, that we identify with the equivariant Gromov-Witten invariants of the ADHM moduli space. We show that these corrections can be encoded in a deformation of the Seiberg-Witten prepotential. From the mathematical viewpoint, the D1-D5 system under study displays a twofold nature: the D1-branes viewpoint captures the equivariant quantum cohomology of the ADHM instanton moduli space in the Givental formalism, and the D5-branes viewpoint is related to higher rank equivariant Donaldson-Thomas invariants of P^1 x C^2.
description: 30+1 pages;v2: references added;v3: added comments, version to appear in JHEP
Interferometry of class I methanol masers, statistics and the distance scale
Creators: name: Voronkov, M. A.
name: Breen, S. L.
name: Ellingsen, S. P.
name: Jordan, C. H.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Australia Telescope Compact Array (ATCA) participated in a number of survey programs to search for and image common class I methanol masers (at 36 and 44 GHz) with high angular resolution. In this paper, we discuss spatial and velocity distributions revealed by these surveys. In particular, the number of maser regions is found to fall off exponentially with the linear distance from the associated young stellar object traced by the 6.7-GHz maser, and the scale of this distribution is 263+/-15 milliparsecs. Although this relationship still needs to be understood in the context of the broader field, it can be utilised to estimate the distance using methanol masers only. This new technique has been analysed to understand its limitations and future potential. It turned out, it can be very successful to resolve the ambiguity in kinematic distances, but, in the current form, is much less accurate (than the kinematic method) if used on its own.
description: 4 pages, 1 figure, to appear in proceedings of IAU Symposium 336 "Astrophysical Masers: Unlocking the Mysteries of the Universe", Editors: A. Tarchi, M. J. Reid & P. Castangia
martellata report - beta version
Creators: name: Gambacorti-Passerini, Martino
Publisher: name: Zenodo
Year: 2023
Subjects: qgis
qfield
forest
martellata
forestale

description: martellata report 1.0.2 - beta version è un progetto qgis predisposto per essere utilizzato all'interno dell'applicazione Qfield al fine di georeferenziare le aree di intervento di assegno al taglio delle piante o semplicemente per stimare il volume tariffario delle piante. 

Il progetto è in fase beta (sperimentale) e non si risponde della accuratezza dei dati e delle eventuali conseguenze del suo utilizzo. La mappa di base è quella di OSM (openstreetmap) fusa assieme alla Carta Tecnica della Provincia Autonoma di Trento.

Le tariffe (Scrinzi, G., Galvagni, D., & Marzullo, L. 2010) utilizzate per il calcolo dei volumi tariffari sono quelle pubblicate sul sito del Servizio Foreste della Provincia Autonoma di Trento, per le “altre latifoglie” vengono utilizzati i valori relativi al faggio.

Le attribuzioni e le singole licenze sono riportate all'interno del file pdf allegato al progetto qgis.

M. Gambacorti-Passerini

Nella versione 1.0.2 beta è stato corretto un piccolo bug che impediva di modificare correttamente la specie di un inserimento in un secondo momento e corretto un errore di caricamento.
description: Project is released under CC BY-NC 4.0 License (Attribution-NonCommercial).
Single layers are property of original owners/authors and have been used in the project in respect of the licenses declared by owners and reported inside the pdf file attached to the project which details them (citing also where is possible to download the original version released by their owners/authors.
Dynamical creation of bosonic Cooper-like pairs
Creators: name: Keilmann, T.
name: Garcia-Ripoll, J. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a scheme to create a metastable state of paired bosonic atoms in an optical lattice. The most salient features of this state are that the wavefunction of each pair is a Bell state and that the pair size spans half the lattice, similar to fermionic Cooper pairs. This mesoscopic state can be created with a dynamical process that involves crossing a quantum phase transition and which is supported by the symmetries of the physical system. We characterize the final state by means of a measurable two-particle correlator that detects both the presence of the pairs and their size.
A Walk Through the Approximations of Ab Initio Multiple Spawning
Creators: name: Mignolet, Benoit
name: Curchod, Basile F. E.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Full Multiple Spawning offers an in principle exact framework for excited-state dynamics, where nuclear wavefunctions in different electronic states are represented by a set of coupled trajectory basis functions that follow classical trajectories. The couplings between trajectory basis functions can be approximated to treat molecular systems, leading to the Ab Initio Multiple Spawning method, which has been successfully employed to study the photochemistry and photophysics of several molecules. However, a detailed investigation of its approximations and their consequences is currently missing in the literature. In this work, we simulate the explicit photoexcitation and subsequent excited-state dynamics of a simple system, LiH, and we analyze (i) the effect of the Ab Initio Multiple Spawning approximations on different observables and (ii) the convergence of the Ab Initio Multiple Spawning results towards numerically exact quantum dynamics upon a progressive relaxation of these approximations. We show that, despite the crude character of the approximations underlying Ab Initio Multiple Spawning for this low-dimensional system, the qualitative excited-state dynamics is adequately captured, and affordable corrections can further be applied to ameliorate the coupling between trajectory basis functions.
Standard Model predictions for B -> Kll with form factors from lattice QCD
Creators: name: Bouchard, Chris
name: Lepage, G. Peter
name: Monahan, Christopher
name: Na, Heechang
name: Shigemitsu, Junko
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We calculate, for the first time using unquenched lattice QCD form factors, the Standard Model differential branching fractions $dB/dq^2(B \to Kll)$ for $l=e, μ, τ$ and compare with experimental measurements by Belle, BABAR, CDF, and LHCb. We report on $\mathcal{B}(B \to Kll)$ in $q^2$ bins used by experiment and predict $\mathcal{B}(B \to K ττ) = (1.44 \pm 0.15) 10^{-7}$. We also calculate the ratio of branching fractions $R^μ_e = 1.00023(63)$ and predict $R^τ_l = 1.159(40)$, for $l=e, μ$. Finally, we calculate the "flat term" in the angular distribution of the differential decay rate $F_H^{e, μ, τ}$ in experimentally motivated $q^2$ bins.
description: 6 pages, 3 figures; v4 corrected error in evaluation of Wilson coefficient C9eff, resulting in
martellata report - beta version
Creators: name: Gambacorti-Passerini, Martino
Publisher: name: Zenodo
Year: 2023
Subjects: qgis
qfield
forest
martellata
forestale

description: martellata report 1.0.1 - beta version è un progetto qgis predisposto per essere utilizzato all'interno dell'applicazione Qfield al fine di georeferenziare le aree di intervento di assegno al taglio delle piante o semplicemente per stimare il volume tariffario delle piante. Il progetto è in fase beta (sperimentale) e non si risponde della accuratezza dei dati e delle eventuali conseguenze del suo utilizzo. La mappa di base è quella di OSM (openstreetmap) fusa assieme alla Carta Tecnica della Provincia Autonoma di Trento. Le tariffe (Scrinzi, G., Galvagni, D., & Marzullo, L. 2010) utilizzate per il calcolo dei volumi tariffari sono quelle pubblicate sul sito del Servizio Foreste della Provincia Autonoma di Trento, per le “altre latifoglie” vengono utilizzati i valori relativi al faggio. Le attribuzioni e le singole licenze sono riportate all'interno del file pdf allegato al progetto qgis. M. Gambacorti-Passerini Nella versione 1.0.1 beta è stato corretto un piccolo bug che impediva di modificare correttamente la specie di un inserimento in un secondo momento.
description: Project is released under CC BY-NC 4.0 License (Attribution-NonCommercial). Single layers are property of original owners/authors and have been used in the project in respect of the licenses declared by owners and reported inside the pdf file attached to the project which details them.
Bourgueville, Charles de, Les Recherches et antiquitez de la province de Neustrie, à present duché de Normandie, comme des villes remarquable sic d'icelles: mais plus speciallement de la ville et université de Caen, Caen, Impr. De T. Chalopin, Nouvelle édition, 1833.
Creators: name: de Bourgueville, Charles
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2019

description: Source: https://books.google.fr/books?id=eKxfAAAAcAAJ&printsec=frontcover&dq=inauthor:bourgueville&hl=fr&sa=X&ved=0ahUKEwiMqeXY-YbjAhXSz4UKHRZpDXoQ6AEIKDAA#v=onepage&q&f=false
description: Relation: vignette : https://www.nakala.fr/data/11280/fe3b3a98
Gross fibrations, SYZ mirror symmetry, and open Gromov-Witten invariants for toric Calabi-Yau orbifolds
Creators: name: Chan, Kwokwai
name: Cho, Cheol-Hyun
name: Lau, Siu-Cheong
name: Tseng, Hsian-Hua
Publisher: name: arXiv
Year: 2013
Subjects: subject: Symplectic Geometry (math.SG)
subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: For a toric Calabi-Yau (CY) orbifold $\mathcal{X}$ whose underlying toric variety is semi-projective, we construct and study a non-toric Lagrangian torus fibration on $\mathcal{X}$, which we call the Gross fibration. We apply the Strominger-Yau-Zaslow (SYZ) recipe to the Gross fibration of $\mathcal{X}$ to construct its mirror with the instanton corrections coming from genus 0 open orbifold Gromov-Witten (GW) invariants, which are virtual counts of holomorphic orbi-disks in $\mathcal{X}$ bounded by fibers of the Gross fibration. We explicitly evaluate all these invariants by first proving an open/closed equality and then employing the toric mirror theorem for suitable toric (partial) compactifications of $\mathcal{X}$. Our calculations are then applied to (1) prove a conjecture of Gross-Siebert on a relation between genus 0 open orbifold GW invariants and mirror maps of $\mathcal{X}$ -- this is called the open mirror theorem, which leads to an enumerative meaning of mirror maps, and (2) demonstrate how open (orbifold) GW invariants for toric CY orbifolds change under toric crepant resolutions -- an open analogue of Ruan's crepant resolution conjecture.
description: v4: 65 pages, significantly shortened to avoid too much overlap with arXiv:1006.3830 and arXiv:1206.3994, to appear in JDG
Tracking objects using 3D object proposals
Creators: name: Pahwa, Ramanpreet Singh
name: Ng, Tian Tsong
name: Do, Minh N.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Robotics (cs.RO)
subject: Computational Geometry (cs.CG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: 3D object proposals, quickly detected regions in a 3D scene that likely contain an object of interest, are an effective approach to improve the computational efficiency and accuracy of the object detection framework. In this work, we propose a novel online method that uses our previously developed 3D object proposals, in a RGB-D video sequence, to match and track static objects in the scene using shape matching. Our main observation is that depth images provide important information about the geometry of the scene that is often ignored in object matching techniques. Our method takes less than a second in MATLAB on the UW-RGBD scene dataset on a single thread CPU and thus, has potential to be used in low-power chips in Unmanned Aerial Vehicles (UAVs), quadcopters, and drones.
description: 4 pages, 4 figures, published in APSIPA 2017
André-Martin-François Plaisant du Château
Creators: name: Plouvain, Pierre-Antoine-Samuel-Joseph (1754-1832)
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2017
Subjects: Officier de justice d'Ancien Régime

description: Source: http://www.sudoc.fr/080675700
description: Coverage: Parlement de Flandre
The Radio and $γ$-ray Variability Analysis of S5 0716+714
Creators: name: Li, H. Z.
name: Jiang, Y. G.
name: Yi, T. F.
name: Guo, D. F.
name: Chen, X.
name: Zhang, H. M.
name: Gao, Q. G.
name: Lu, F. W.
name: Ren, J. Y.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have studied the variability of \object{S5 0716+714} at radio 15 GHz and $γ$-ray band using three different methods. A possible periodicity of $P_{15 GHz}=266.0\pm11.5$ and $P_γ=344.0\pm16.4$ days are obtained for radio 15 GHz and $γ$-ray light curves, respectively. The variability may be related to the intrinsically emission mechanism. The difference between the variability timescales of radio 15 GHz and $γ$-ray may be due to that the emission of radio 15 GHz is produced via the synchrotron process, while the $γ$-ray is produced by both the SSC and EC processes.
description: 8 pages, 5 figures, Accepted for publication in ApSS
Search for weakly interacting sub-eV particles with the OSQAR laser-based experiment: results and perspectives
Creators: name: Pugnat, P.
name: Ballou, R.
name: Schott, M.
name: Husek, T.
name: Sulc, M.
name: Deferne, G.
name: Duvillaret, L.
name: Finger, M.
name: Finger, M.
name: Flekova, L.
name: Hosek, J.
name: Jary, V.
name: Jost, R.
name: Kral, M.
name: Kunc, S.
name: Macuchova, K.
name: Meissner, K. A.
name: Morville, J.
name: Romanini, D.
name: Siemko, A.
name: Slunecka, M.
name: Vitrant, G.
name: Zicha, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recent theoretical and experimental studies highlight the possibility of new fundamental particle physics beyond the Standard Model that can be probed by sub-eV energy experiments. The OSQAR photon regeneration experiment looks for "Light Shining through a Wall" (LSW) from the quantum oscillation of optical photons into "Weakly Interacting Sub-eV Particles" (WISPs), like axion or axion-like particles (ALPs), in a 9 T transverse magnetic field over the unprecedented length of $2 \times 14.3$ m. No excess of events has been detected over the background. The di-photon couplings of possible new light scalar and pseudo-scalar particles can be constrained in the massless limit to be less than $8.0\times10^{-8}$ GeV$^{-1}$. These results are very close to the most stringent laboratory constraints obtained for the coupling of ALPs to two photons. Plans for further improving the sensitivity of the OSQAR experiment are presented.
description: 7 pages, 7 figures
Time-Dependent Electron Acceleration in Pulsar-Wind Termination Shocks: Application to the 2011 April Crab Nebula Gamma-Ray Flare
Creators: name: Kroon, John J.
name: Becker, Peter A.
name: Finke, Justin D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The $γ$-ray flares from the Crab nebula observed by {\it AGILE} and {\it Fermi}-LAT between 2007-2013 reached GeV photon energies and lasted several days. The strongest emission, observed during the 2011 April "super-flare," exceeded the quiescent level by more than an order of magnitude. These observations challenge the standard models for particle acceleration in pulsar wind nebulae, because the radiating electrons have energies exceeding the classical radiation-reaction limit for synchrotron. Particle-in-cell simulations have suggested that the classical synchrotron limit can be exceeded if the electrons also experience electrostatic acceleration due to shock-driven magnetic reconnection. In this paper, we revisit the problem using an analytic approach based on solving a fully time-dependent electron transport equation describing the electrostatic acceleration, synchrotron losses, and escape experienced by electrons in a magnetically confined plasma "blob" as it encounters and passes through the pulsar-wind termination shock. We show that our model can reproduce the $γ$-ray spectra observed during the rising and decaying phases of each of the two sub-flare components of the 2011 April super-flare. We integrate the spectrum for photon energies $\ge 100\,$MeV to obtain the light curve for the event, which agrees with the observations. We find that strong electrostatic acceleration occurs on both sides of the termination shock, driven by magnetic reconnection. We also find that the dominant mode of particle escape changes from diffusive escape to advective escape as the blob passes through the shock.
description: 8 figures, 29 pages
Fission Fragment Mass and Total Kinetic Energy Distributions of Spontaneously Fissioning Plutonium Isotopes
Creators: name: Pomorski, K.
name: Nerlo-Pomorska, B.
name: Bartel, J.
name: Schmitt, C.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The fission-fragment mass and total kinetic energy (TKE) distributions are evaluated in a quantum mechanical framework using elongation, mass asymmetry, neck degree of freedom as the relevant collective parameters in the Fourier shape parametrization recently developed by us. The potential energy surfaces (PES) are calculated within the macroscopic-microscopic model based on the Lublin-Strasbourg Drop (LSD), the Yukawa-folded (YF) single-particle potential and a monopole pairing force. The PES are presented and analysed in detail for even-even Plutonium isotopes with $A=236 -246$. They reveal deep asymmetric valleys. The fission-fragment mass and TKE distributions are obtained from the ground state of a collective Hamiltonian computed within the Born-Oppenheimer approximation, in the WKB approach by introducing a neck-dependent fission probability. The calculated mass and total kinetic energydistributions are found in good agreement with the data.
description: 10 pages, 7 figures, Eur. Phys. Journ. Web of Conf. (2018) Proc. of the THEORY-4 Scientific Workshop on the Nuclear Fission Dynamics and the Emission of Prompt Neutrons and Gamma Rays, 20-22 June, Varna, Bulgaria
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome V, Cart. 189 (11 H 74), 316 folios, f. 0012r
Creators: name: de la Côte d'Or, Archives départementales
name: CG21/F.PETOT/2012
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
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: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome V, Archives départementales de la Côte-d'Or, Cart. 189 (11 H 74), 316 folios, f. 0012r, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome V, Archives départementales de la Côte-d'Or, Cart. 189 (11 H 74), 316 folios, f. 0012r, 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
Fundamental Conditions for N-th Order Accurate Lattice Boltzmann Models
Creators: name: Chen, Hudong
name: Shan, Xiaowen
Publisher: name: arXiv
Year: 2007
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: In this paper, we theoretically prove a set of fundamental conditions pertaining discrete velocity sets and corresponding weights. These conditions provide sufficient conditions for a priori formulation of lattice Boltzmann models that automatically admit correct hydrodynamic moments up to any given N-th order.
La formation à l'éthique dans le commandement militaire. Communication à la onzième journée du GDR Cadres (résumé)
Creators: name: Reboul (Colonel), Richard
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2019
Subjects: Aptitude pour la direction
Forces armées -- Direction
Éthique militaire

description: Temporal: 2000-2010
Extending Counter-Streaming Motion from an Active Region Filament to Sunspot Light Bridge
Creators: name: Wang, Haimin
name: Liu, Rui
name: Li, Qin
name: Liu, Chang
name: Deng, Na
name: Xu, Yan
name: Jing, Ju
name: Wang, Yuming
name: Cao, Wenda
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We analyze the high-resolution observations from the 1.6m telescope at Big Bear Solar Observatory that cover an active region filament. Counter-streaming motions are clearly observed in the filament. The northern end of the counter-streaming motions extends to a light bridge, forming a spectacular circulation pattern around a sunspot, with clockwise motion in the blue wing and counterclockwise motion in the red wing as observed in Halpha off-bands. The apparent speed of the flow is around 10 to 60 km/s in the filament, decreasing to 5 to 20 km/s in the light bridge. The most intriguing results are the magnetic structure and the counter-streaming motions in the light bridge. Similar to those in the filament, magnetic fields show a dominant transverse component in the light bridge. However, the filament is located between opposite magnetic polarities, while the light bridge is between strong fields of the same polarity. We analyze the power of oscillations with the image sequences of constructed Dopplergrams, and find that the filament's counter-streaming motion is due to physical mass motion along fibrils, while the light bridge's counter-streaming motion is due to oscillation in the direction along the line-of-sight. The oscillation power peaks around 4 minutes. However, the section of the light bridge next to the filament also contains a component of the extension of the filament in combination with the oscillation, indicating that some strands of the filament are extended to and rooted in that part of the light bridge.
description: 5 Figures, ApJ Letter, Accepted
The Fox project : advanced development of systems software
Creators: name: Cooper, Eric Charles.
name: Harper, Robert
name: , Lee
Publisher: name: Carnegie Mellon University
Year: 1978
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Abstract: "The Fox project will use an advanced programming language to build software such as operating systems, network protocols, and distributed systems. The goals of the project are to improve the design and construction of real systems software and to further the development of advanced programming languages. We will base our work on Standard ML, a modern functional programming language that provides polymorphism, first-class functions, exception handling, garbage collection, a parameterized module system, static typing, and formal semantics. The Fox project spans a wide range of research interests, from experimental systems building to type theory, and involves several faculty members."
Gauge symmetry and background independence: Should the proton spin decomposition be path independent?
Creators: name: Lorcé, Cédric
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Exploring the similarities between the Chen \emph{et al.} approach, where physical and gauge degrees of freedom of the gauge potential are explicitly separated, and the background field method, we provide an alternative point of view to the proton spin decomposition issue. We show in particular that the gauge symmetry can be realized in two different ways, and discuss the relations between the concepts of path dependence, Stueckelberg dependence and background dependence. Finally, we argue that path/Stueckelberg/background-dependent decompositions of the proton spin are in principle measurable and therefore physically meaningful.
description: 10 pages, extended version
Theoretical study on isotopic shift in angle-resolved photoemission spectra of Bi2Sr2CaCu2O8
Creators: name: Ji, Kai
name: Nasu, Keiichiro
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We develop a path-integral theory to study the angle-resolved photoemission spectra (ARPES) of high-T_c superconductors based on a two-dimensional model for the CuO2 conduction plane, including both electron-electron (e-e) and electron-phonon (e-ph) interactions. Comparing our result with the experimental one of Bi2Sr2CaCu2O8, we find that the experimentally observed isotopic band shift in ARPES is due to the off-diagonal quadratic e-ph coupling, whereas the presence of e-e repulsion partially suppresses this effect.
description: 4 pages, 2 figures, Procs. of IVC-17/ICSS-13/ICN+T2007, submitted to J. Phys.: Conf. Ser
On the electrostatic field created at ground level by a halo
Creators: name: Pérez-Invernón, F. J.
name: Gordillo-Vázquez, F. J.
name: Luque, A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: We investigate the effect of halo activity on the electrostatic field measured at ground level. We use electrostatic arguments as well as self-consistent simulations to show that, due to the screening charge in the ionosphere, the distant electrostatic field created by the uncompensated charge in a thundercloud decays exponentially rather than as the third power of the distance. Furthermore, significative ionization around the lower edge of the ionosphere slightly reduces the electrostatic field at ground level. We conclude that halos do not extend the range of detectability of lightning-induced electrostatic fields.
Controlling spatiotemporal chaos in excitable media using an array of control points
Creators: name: Sridhar, S.
name: Sinha, Sitabhra
Publisher: name: arXiv
Year: 2007
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The dynamics of activation waves in excitable media can give rise to spiral turbulence, the resulting spatiotemporal chaos being associated with empirical biological phenomena such as life-threatening disturbances in the natural rhythm of the heart. In this paper, we propose a spatially extended but non-global scheme using an array of control points for terminating such spatiotemporally chaotic excitations. A low-amplitude control signal is applied sequentially at each point on the array, resulting in a traveling wave of excitation in the underlying medium which drives away the turbulent activity. Our method is robust even in the presence of significant heterogeneities in the medium, which have often been an impediment to the success of other control schemes.
description: 5 pages, 5 figures
The Flask Security Architecture: System Support for Diverse Security Policies
Creators: name: Spencer, Ray
name: Smalley, Stephen
name: Loscocco, Peter
name: Hibler, Mike
name: Andersen, David G.
name: Lepreau, Jay
Publisher: name: Carnegie Mellon University
Year: 2005
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Operating systems must be flexible in their support for security policies, providing sufficient mechanisms for supporting the wide variety of real-world security policies. Such flexibility requires controlling the propagation of access rights, enforcing fine-grained access rights and supporting the revocation of previously granted access rights. Previous systems are lacking in at least one of these areas. In this paper we present an operating system security architecture that solves these problems. Control over propagation is provided by ensuring that the security policy is consulted for every security decision. This control is achieved without significant performance degradation through the use of a security decision caching mechanism that ensures a consistent view of policy decisions. Both fine-grained access rights and revocation support are provided by mechanisms that are directly integrated into the service-providing components of the system. The architecture is described through its prototype implementation in the Flask microkernel-based operating system, and the policy flexibility of the prototype is evaluated. We present initial evidence that the architecture's impact on both performance and code complexity is modest. Moreover, our architecture is applicable to many other types of operating systems and environments.
Cysteine and cystine adsorption on FeS$_{2}$(100)
Creators: name: Suzuki, Teppei
name: Yano, Taka-aki
name: Hara, Masahiko
name: Ebisuzaki, Toshikazu
Publisher: name: arXiv
Year: 2017
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Iron pyrite (FeS$_{2}$) is the most abundant metal sulfide on Earth. Owing to its reactivity and catalytic activity, pyrite has been studied in various research fields such as surface science, geochemistry, and prebiotic chemistry. Importantly, native iron-sulfur clusters are typically coordinated by cysteinyl ligands of iron-sulfur proteins. In the present paper, we study the adsorption of L-cysteine and its oxidized dimer, L-cystine, on the FeS$_{2}$ surface, using electronic structure calculations based density functional theory and Raman spectroscopy measurements. Our calculations suggest that sulfur-deficient surfaces play an important role in the adsorption of cysteine and cystine. In the thiol headgroup adsorption on the sulfur-vacancy site, dissociative adsorption is found to be energetically favorable compared with molecular adsorption. In addition, the calculations indicate that, in the cystine adsorption on the defective surface under vacuum conditions, the formation of the S-Fe bond is energetically favorable compared with molecular adsorption. Raman spectroscopic measurements suggest the formation of cystine molecules through the S-S bond on the pyrite surface in aqueous solution. Our results might have implications for chemical evolution at mineral surfaces on the early Earth and the origin of iron-sulfur proteins, which are believed to be one of the most ancient families of proteins.
description: main: 15 pages, 6 figures, 3 tables; supplementary material: 7 pages, 7 figures, 3 tables, submitted to Surface Science
Integral-field spectroscopy of a Lyman-Break Galaxy at z=3.2: evidence for merging
Creators: name: Nesvadba, N. P. H.
name: Lehnert, M. D.
name: Davies, R. I.
name: Verma, A.
name: Eisenhauer, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present spatially-resolved, rest-frame optical spectroscopy of a z~3 Lyman-break galaxy (LBG), Q0347-383 C5, obtained with SINFONI on the VLT. This galaxy, among the ~10% brightest LBGs, is only the second z~3 LBG observed with an integral-field spectrograph. It was first described by Pettini et al. (2001), who obtained WFPC2 F702W imaging and longslit spectroscopy in the K-band. We find that the emission line morphology is dominated by two unresolved blobs at a projected distance of ~5 kpc with a velocity offset of ~33 km s^-1. Velocity dispersions suggest that each blob has a mass of ~10^10 M_sun. Unlike Pettini et al. (2001), our spectra are deep enough to detect H-beta, and we derive star-formation rates of ~20-40 M_sun yr^-1, and use the H-beta/[OIII] ratio to crudely estimate an oxygen abundance 12+[O/H]=7.9-8.6, which is in the range typically observed for LBGs. We compare the properties of Q0347-383 C5 with what is found for other LBGs, including the gravitationally lensed ``arc+core'' galaxy (Nesvadba et al. 2006), and discuss possible scenarios for the nature of the source, namely disk rotation, a starburst-driven wind, disk fragmentation, and merging of two LBGs. We favor the merging interpretation or bright, extended LBGs like Q0347-383C5, in broad agreement with predicted merger rates from hierarchical models.
description: A&A accepted
Run-and-tumble in a crowded environment: persistent exclusion process for swimmers
Creators: name: Soto, Rodrigo
name: Golestanian, Ramin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: The effect of crowding on the run-and-tumble dynamics of swimmers such as bacteria is studied using a discrete lattice model of mutually excluding particles that move with constant velocity along a direction that is randomized at a rate $α$. In stationary state, the system is found to break into dense clusters in which particles are trapped or stopped from moving. The characteristic size of these clusters predominantly scales as $α^{-0.5}$ both in 1D and 2D. For a range of densities, due to cooperative effects, the stopping time scales as ${\cal T}_{1d}^{0.85}$ and as ${\cal T}_{2d}^{0.8}$, where ${\cal T}_d$ is the diffusive time associated with the motion of cluster boundaries. Our findings might be helpful in understanding the early stages of biofilm formation.
description: 7 pages, 5 figures, accepted in PRE
title: Investigations into ivermectin resistance mechanisms in parasitic nematodes and the development of PROTAC technology towards the selective degradation of HIV Capsid protein
Creators: name: Ruddell, Stuart
Publisher: name: University of Glasgow
Year: 2019
Subjects: subject: Anthelmintic, bifunctional molecule, chemical biology, fluorescent probe, HIV, ivermectin, nematode, PF74, PROTAC.

description: This thesis comprises two projects detailing the synthesis and testing of bifunctional molecules. The projects were aimed at addressing the key biological problems of combating drug resistance and the requirement for novel therapeutic strategies. Chapter one details the first of these projects, which was concerned with elucidating the mechanism(s) of drug resistance in parasitic nematodes by using bifunctional fluorescent chemical probes based on the anthelmintic drug ivermectin. The first section presents the relevant background information for the project including information regarding the mechanism of action of ivermectin and the basic anatomy of nematodes, which were used to guide the design of the probes, BLI and FBI. The second section discusses the synthesis of each of the probes as well as their biological assaying used to assess the utility of the probes for the purposes of studying ivermectin resistance. The FBI probe was then administered to both free-living and parasitic nematode strains, which when assessed with fluorescence microscopy, successfully identified the route of ivermectin uptake. Furthermore, the data generated was consistent with impaired drug uptake as an operative mechanism of ivermectin resistance. The final section comprises experimental data regarding the preparation and characterisation of the discussed compounds as well as biological assay data. Chapter two details a project aimed at developing heterobifunctional PROTAC molecules towards the selective degradation of HIV capsid protein in human cells. The first section presents the relevant background information for the project including information on the chosen protein targets, which was used to guide the design of the PROTAC molecules. These molecules are based on the HIV capsid inhibitor PF74. The second section discusses the synthesis of each of the PROTAC molecules. Additionally, the synthesis of (S)- and (R)-PF74 and an epimerisation study of PF74 are discussed. The third section discusses the biological assaying of the enantiomers of PF74, which successfully identified (S)-PF74 as significantly more active than (R)-PF74. In addition, the testing of each of the synthesised PROTACs is presented, which successfully demonstrated inhibition of HIV replication and answered fundamental questions regarding PROTAC target engagement. The final section comprises experimental data regarding the preparation and characterisation of the discussed compounds as well as biological assay data.
The first Segway soccer experience : towards peer-to-peer human-robot teams
Creators: name: Argall, Brenna
Publisher: name: Carnegie Mellon University
Year: 2007
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Abstract: "Robotic soccer is an adversarial multi-agent research domain, in which issues of perception, multi-agent coordination and team strategy are explored. We define particularly a game involving heterogeneous teams of humans and robots. Here teammates must coordinate not as master and slave, but as equal participants. One of our contributions is to research this peer-to-peer question within the domain of Segway soccer, where teams of humans riding Segway HTs and robotic Segway RMPs coordinate together in competition against other human-robot teams. Beyond the task of physically enabling these robots to play soccer, a key issue in the development of such a heterogeneous team is determining the balance between the human and robot player. The first ever Segway soccer competition occurred at the 2005 RoboCup US Open, where demonstrations were held between Carnegie Mellon University (CMU) and the Neurosciences Institute (NSI). Through the execution of these soccer demonstrations, many of the challenges associated with maintaining equality within a peer-to-peer game were revealed. This paper chronicles our experience within the Segway soccer demonstrations at the 2005 US Open, and imparts our interpretation and analysis regarding what is needed to better attain this goal of teammate equality within the peer-to-peer research domain. We begin with an explanation of the motivations behind the Segway soccer and peer-to-peer research, providing details of the game rules and flow. We then describe our approach to the building of a heterogeneous Segway soccer team, in which we developed a robot-dominated soccer strategy. Robot decision making was autonomous, and the human player reacted to the robot's chosen actions. Our analysis of the experience at the US Open is presented, giving regard to both research challenges as well as difficulties in the physical execution of a Segway soccer game. We evaluate the strengths and weaknesses of our robot-driven approach within the context of game performance, as well as in contrast to the human-driven approach of our opponent team from NSI. While each team displayed either a strong bias towards the human or the robot, the intent of these peer-to-peer games is in fact to explore teamwork where the teammates are equal. Based upon our observations from the actual demonstrations, and interpretation of the research goals of the league, we offer a revised set of game rules. We conclude with thoughts on the direction of future research within the Segway soccer domain."
Holographic Floquet states II: Floquet condensation of vector mesons in nonequilibrium phase diagram
Creators: name: Kinoshita, Shunichiro
name: Murata, Keiju
name: Oka, Takashi
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: With the aim to reveal universal features of hadronic matter and correlated Dirac insulators in strong AC-electric fields, we study the $\mathcal{N}=2$ supersymmetric QCD with a finite quark mass driven by a rotating electric field $\mathcal{E}_x+i\mathcal{E}_y= E e^{iΩt}$. The analysis is done in the holographically dual D3/D7 system in the co-rotating frame, effectively. The nonequilibrium phase diagram is determined from the threshold electric field at which the insulator phase breaks down to a conductive phase due to the AC version of the Schwinger mechanism. The external field induces a rotating current $\mathcal{J}_x + i \mathcal{J}_y = J e^{iΩt}$ originating from vacuum polarization and dissipative current in the insulating and conductive phases respectively. Intriguing features are observed as the frequency $Ω$ approaches resonance with the meson excitation energy $Ω_{\rm meson}$. There, the threshold minimizes and a condensate of vector mesons with oscillating current exists even in the zero driving field limit. This state, which we call Floquet condensate of vector mesons, is expected to be dynamically stable realizing a non-thermal fixed point that breaks time translational and reversal symmetries. Our finding has many similarities with exciton BEC discussed in solid state systems, where the semiconductor is to be replaced by materials hosting gapped Dirac electrons, e.g. 3D topological insulators or bismuth. Vector meson Floquet condensate may also have implications in the pre-thermalized dynamics in heavy ion collision experiments.
description: 36 pages, 15 figures
title: Candidature projet de résidence "Design scene for the drama Waiting for Godot (Samuel Beckett) with a view of visual communication to show the role of visual communication in design scene" Fondation Camargo 2016
Creators: name: Aboutalebi, Roja
name: Ahmadi Motlagh, Samaneh
name: Hasanlou, Saeed
name: Sadeghikolaei, Sadegh
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: Candidature pour projet de résidence à la Fondation Camargo, réalisée par Roja Aboutalebi; Saeed Hasanlou; Samaneh Ahmadi Motlagh et Sadegh Sadeghikolaei.
Reactive transport under stress: Permeability evolution in deformable porous media
Creators: name: Roded, Roi
name: Paredes, Xavier
name: Holtzman, Ran
Publisher: name: arXiv
Year: 2018
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study reactive transport in a stressed porous media, where dissolution of the solid matrix causes two simultaneous, competing effects: pore enlargement (chemical deformation), and pore compaction due to mechanical weakening. A novel, mechanistic pore-scale model simulates flooding of a sample under fixed confining stress, showing that increasing stress inhibits permeability enhancement, increasing the injected volume required to reach a certain permeability, in agreement with recent experiments. We explain this behavior by stress concentration downstream, in the less dissolved (hence stiffer) region. As this region is also less conductive, even its small compaction has a strong bottleneck effect that curbs the permeability. Our results also elucidate that the impact of stress depends on the dissolution regime. Under wormholing conditions (slow injection, i.e. high Damkohler, $Da$), the development of a sharp dissolution front and high porosity contrast accentuates the bottleneck effect. This reduces transport heterogeneity, promoting wormhole competition. Once the outlet starts eroding, the extreme focusing of transport and hence dissolution--characteristic of wormholing--becomes dominant, diminishing the bottleneck effect and hence the impact of stress. In contrast, at low $Da$, incomplete reaction upstream allows the reagent to traverse the sample, causing a more uniform dissolution. The continuous dissolution and its partial counteraction by compaction downstream provides a steady, gradual increase in the effect of stress. Consequently, the impact of stress is more pronounced at high $Da$ during early stages (low permeability), and at low $Da$ close to breakthrough. Our work promotes understanding of the hydromechanical property evolution, with important implications for processes ranging from diagenesis and weathering of rocks, to well stimulation and carbon geosequetration.
A universal set of qubit quantum channels
Creators: name: Braun, Daniel
name: Giraud, Olivier
name: Nechita, Ion
name: Pellegrini, Clement
name: Znidaric, Marko
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We investigate the set of quantum channels acting on a single qubit. We provide an alternative, compact generalization of the Fujiwara-Algoet conditions for complete positivity to non-unital qubit channels, which we then use to characterize the possible geometric forms of the pure output of the channel. We provide universal sets of quantum channels for all unital qubit channels as well as for all extremal (not necessarily unital) qubit channels, in the sense that all qubit channels in these sets can be obtained by concatenation of channels in the corresponding universal set. We also show that our universal sets are essentially minimal.
description: 34 pages of revtex, 3 figures. v2: minor typos corrected
The eXtreme programming (XP) metaphor and software architecture
Creators: name: Herbsleb, James
name: Root, David
name: J. E.(James E.) Tomayko
Publisher: name: Carnegie Mellon University
Year: 2004
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Abstract: "The Metaphor is intended to contribute to the Agile Programming value of communication. Previously, some of the author [sic] studied the Metaphor as a means of communication among team members and between them and clients. This paper examines the Metaphor's contribution to the software architecture. Both experiments seem to reveal that the Metaphor has poor effectiveness."