cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Author guidelines in chemistry through the lens of research data sharing
Creators: name: Nicole A. Parks
name: Tilmann G. Fischer
name: Claudia Blankenburg
name: Vincent F. Scalfani
name: Leah R. McEwen
name: Sonja Herres-Pawlis
name: Steffen Neumann
Publisher: name: Zenodo
Year: 2023
Subjects: research data management
NFDI4Chem
publication standards
author guidelines
chemistry

description: NFDI4Chem’s vision is the digitalisation of all key steps in chemical research to support scientists in their efforts to collect, store, process, analyse, publish, and re-use research data [1]. For that goal, we aim at making chemical research data FAIR (Findable, Accessible, Interoperable, Reusable) [2]. 

As the primary method of communicating research results, journals and their author guidelines have a tremendous impact on community behavior. To work with scientific journal editors to enhance recommendations on data publication, we organised the Editors4Chem workshop in 2021 [3]. The 2nd Editors4Chem workshop will be held in the fall of 2023. Additionally, we analysed author guidelines from several publishers and journals active in chemistry research.

This poster outlines the results of a large-scale analysis [4] of author guidelines: To which extent is the publishing landscape supporting FAIR Data and Open Science practices? In which areas is this support lacking and what are the underlying reasons? How should authors navigate these changes?

 

[1]  C. Steinbeck, O. Koepler, F. Bach, S. Herres-Pawlis, N. Jung, J. Liermann, S. Neumann, et al., Research Ideas and Outcomes, 2020, 6: e55852. DOI: 10.3897/rio.6.e55852. Website: www.nfdi4chem.de.

[2]  M. Wilkinson, M. Dumontier, I. Aalbersberg, G. Appleton, M. Axton, A. Baak, N. Blomberg, J.-W. Boiten, L. B. da Silva Santos, P. E. Bourne, et al. Sci Data 2016, 3, 160018, DOI: 10.1038/sdata.2016.18.

[3] T. G. Fischer, 1st Editors4Chem Workshop, www.nfdi4chem.de, 2021, URL: www.nfdi4chem.de/index.php/2021/11/23/1st-editors4chem-workshop/ 

[4] N. A. Parks, T. G. Fischer, C. Blankenburg, V. F. Scalfani, L. R. McEwen, S. Herres-Pawlis, S. Neumann, Pure Appl. Chem. 2023, ASAP. DOI: 10.1515/pac-2022-1001.
LA PAROLA VISTA: STRATEGIE VISUALI E SCENICHE NE LA RELIGlEUSE DI DIDEROT
Creators: name: BERTOLINI, MICHELE
Publisher: name: Dipartimento di Scienze Umane, Università di Ferrara
Year: 2015
Subjects: Philosophy, Modern Philosophy, Aesthetics, Diderot,

description: La Religieuse can be included in Diderot’s project of dialogue, comparison and reciprocal enlightenment of the arts of representation. Such a dialogue assigns a predominant role to the visual dimension, as it is closely linked to the imagination process at work in the production and fruition of the works of art. This does set the ground for the comparison of word and image, of tale and pictures, as, through the tormented story of Suzanne Simonin, Diderot’s novel stages the feminine body in its pathetic, desiring, suffering, aesthetic and erotic dimension, and it becomes the description and institution of paintings and scenes, in close theoretical connection with the traced path of the Salons. Particularly, the essay sets out to focus on Suzanne’s gaze, on function of literary detail and pictorial patterns in Diderot’s novel.
description: I castelli di Yale online, volume III, numero 2, 2015
DEVELOPMENT OF THE UTILIZATION OF PASTORAL LAND IN THE EU 25 AFTER 2003
Creators: name: Roeder, Norbert
name: Hennessy, Thia C.
name: Stilmant, Didier
name: Roeder, Norbert
name: Hennessy, Thia C.
name: Stilmant, Didier
Publisher: name: Unknown
Year: 2007
Subjects: subject: Land Economics/Use
subject: Pastoral Systems
subject: EU
subject: 2003 CAP Reform
subject: Enlargement

description: Farming systems based on products of roughage feeders are a vital part of the EU agricultural production. Up to the CAP reform in 2003 the EU promoted these systems via a wide variety of measures. This paper highlights the different impacts European, national and regional support measures have on the utilization of pastoral resources across the EU-25. Based on an expert survey and a literature review the paper summarizes the expected developments of pastoral farming systems across the EU.
Particle-hole symmetry breaking in a spin-dimer system TlCuCl$_3$ observed at 100 T
Creators: name: Zhou, X. -G.
name: Yao, Yuan
name: Matsuda, Y. H.
name: Ikeda, A.
name: Matsuo, A.
name: Kindo, K.
name: Tanaka, H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The entire magnetization process of TlCuCl$_3$ has been experimentally investigated up to 100 T employing the single-turn technique. The upper critical field $H_{c2}$ is observed to be 86.1 T at 2 K. A convex slope of the $M$-$H$ curve between the lower and upper critical fields ($H_{c1}$ and $H_{c2}$) is clearly observed, which indicates that a particle-hole symmetry is broken in TlCuCl$_3$. By quantum Monte Carlo simulation and the bond-operator theory method, we find that the particle-hole symmetry breaking results from strong inter-dimer interactions.
Low-energy pions in nuclear matter and pi pi photoproduction within a BUU transport model
Creators: name: Buss, Oliver
name: Alvarez-Ruso, Luis
name: Muehlich, Pascal
name: Mosel, Ulrich
name: Shyam, Radhey
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In the present paper we investigate a method to describe low-energy scattering events of pions and nuclei within a Boltzmann-Uehling-Uhlenbeck (BUU) transport model. Implementing different scenarios of medium modifications, we studied the mean free path of pions in nuclear matter at low momenta and compared pion absorption simulations to data. Pursuing these studies we have shown, that also in a regime of a long pionic wave length the semi-classical BUU model still generates reasonable results. We present results on pi-induced events in the regime of 10 MeV < Tkin < 130 MeV and photo-induced pi pi production at incident beam energies of 400-460 MeV.
description: 8 pages, 4 figures, Contribution to the "Workshop on In-Medium Hadron Physics", Giessen, Germany, 11-13 November 2004
A COMPARATIVE ANALYSIS OF FOOD QUALITY ASSURANCE SCHEMES: THE CASE OF NEULAND AND EUREPGAP
Creators: name: Gay, Stephan Hubertus
name: Schneider, Andreas
name: Gay, Stephan Hubertus
name: Schneider, Andreas
Publisher: name: Unknown
Year: 2007
Subjects: subject: Agribusiness
subject: Food Consumption/Nutrition/Food Safety
subject: Quality Assurance Schemes
subject: Food policy
subject: Food chain

description: Food Quality Assurance Schemes (QAS) are widely applied in the European Union. Neuland and EurepGAP represent two different approaches. Neuland differentiates meat clearly by a strict emphasis on rules regarding animal welfare to provide consumers with meat produced at a high animal welfare standard. EurepGAP certifies the compliance to international accepted standards with regard to Good Agricultural Practise to ease the exchange of products throughout the supply chain. In terms of overall benefits and costs, the study showed that for both QAS the benefits clearly outweigh the costs. This paper compares the schemes and their implications for the agro-food chain.
МЕТОДЫ ФОРМИРОВАНИЯ КОММУНИКАТИВНОЙ КОМПЕТЕНТНОСТИ НА ИНОСТРАННОМ ЯЗЫКЕ
Creators: name: Калмуратова, Айзада
Publisher: name: Zenodo
Year: 2024

description: В системе непрерывного образования особое внимание уделяется изучению языка. В условиях современной рыночной экономики и развития информационных технологий потребность в изучении иностранного языка возрастает. Изучение иностранного языка как средства межкультурного общения стало требованием времени. 10 декабря 2012 года Президент Республики Узбекистан принял Постановление № ПК-1875 «О мерах по дальнейшему совершенствованию системы изучения иностранных языков».
New Constraints on the Mass of Fermionic Dark Matter from Dwarf Spheroidal Galaxies
Creators: name: Alvey, James
name: Sabti, Nashwan
name: Tiki, Victoria
name: Blas, Diego
name: Bondarenko, Kyrylo
name: Boyarsky, Alexey
name: Escudero, Miguel
name: Fairbairn, Malcolm
name: Orkney, Matthew
name: Read, Justin I.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Dwarf spheroidal galaxies are excellent systems to probe the nature of fermionic dark matter due to their high observed dark matter phase-space density. In this work, we review, revise and improve upon previous phase-space considerations to obtain lower bounds on the mass of fermionic dark matter particles. The refinement in the results compared to previous works is realised particularly due to a significantly improved Jeans analysis of the galaxies. We discuss two methods to obtain phase-space bounds on the dark matter mass, one model-independent bound based on Pauli's principle, and the other derived from an application of Liouville's theorem. As benchmark examples for the latter case, we derive constraints for thermally decoupled particles and (non-)resonantly produced sterile neutrinos. Using the Pauli principle, we report a model-independent lower bound of $m \geq 0.18\,\mathrm{keV}$ at 68% CL and $m \geq 0.13\,\mathrm{keV}$ at 95% CL. For relativistically decoupled thermal relics, this bound is strengthened to $m \geq 0.59\,\mathrm{keV}$ at 68% CL and $m \geq 0.41\,\mathrm{keV}$ at 95% CL, whilst for non-resonantly produced sterile neutrinos the constraint is $m \geq 2.80\,\mathrm{keV}$ at 68% CL and $m \geq 1.74\,\mathrm{keV}$ at 95% CL. Finally, the phase-space bounds on resonantly produced sterile neutrinos are compared with complementary limits from X-ray, Lyman-$α$ and Big Bang Nucleosynthesis observations.
description: 14 pages, 6 figures, 1 table. Matches version to appear in MNRAS - minor clarifications added
IST EINE REDUZIERUNG DES PFLANZENSCHUTZMITTELEINSATZES IM FREILANDGEMÜSEBAU MÖGLICH? ERGEBNISSE EINES BIOÖKONOMISCHEN SIMULATIONSMODELLS
Creators: name: Dirksmeyer, Walter
name: Dirksmeyer, Walter
Publisher: name: Unknown
Year: 2007
Subjects: subject: Farm Management
subject: Pflanzenschutz
subject: Gemüsebau
subject: Stochastische Simulation
subject: Stochastische Dominanz
subject: Pest control vegetable production
subject: Bio-economic simulation
subject: Monte Carlo simulation
subject: Stochastic dominance

description: In field vegetable production pesticide a levels are very high although pest control technologies are known, which require much less pesticides than the commonly applied control technologies. A stochastic bio-economic simulation model is used to determine the net return derived from the application of different pest control technologies in carrot, leek and onion production. Following the concept of stochastic dominance efficient technologies can be identified. Results reveal that it is possible to reduce pesticide use levels in field vegetable production if alternative control technologies are applied. This is possible without losses in net return on farm level and without increasing risk of field vegetable production. Der Einsatz von chemisch-synthetischen Pflanzenschutzmitteln ist im Freilandgemüsebau sehr hoch. Obwohl Pflanzenschutzverfahren bekannt sind, die deutlich weniger PSM benöti-gen, als dies bei den Standardverfahren der Fall ist, werden sie häufig nur von einem kleinen Kreis der Produzenten angewandt. Mit Hilfe eines stochastischen bioökonomischen Simulationsmodells wird die Verteilung des Nettoertrages ermittelt, die von der Anwendung verschie-dener in der Produktion von Möhren, Porree und Zwiebeln eingesetzter Pflanzenschutzverfah-ren zu erwarten sind. Unter Verwendung des Konzeptes der stochastischen Dominanz können effiziente Verfahren identifiziert werden. Die Simulationsergebnisse zeigen, dass es durch den Einsatz alternativer Pflanzenschutzverfahren im Freilandgemüsebau möglich ist, die PSM-Einsatzmengen zu reduzieren, ohne betriebswirtschaftliche Einbußen oder ein erhöhtes Risiko in Kauf nehmen zu müssen.
Simulations of spiral galaxies with an active potential: molecular cloud formation and gas dynamics
Creators: name: Dobbs, Clare
name: Bonnell, Ian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We describe simulations of the response of a gaseous disc to an active spiral potential. The potential is derived from an N-body calculation and leads to a multi-armed time-evolving pattern. The gas forms long spiral arms typical of grand design galaxies, although the spiral pattern is asymmetric. The primary difference from a grand-design spiral galaxy, which has a consistent 2/4-armed pattern, is that instead of passing through the spiral arms, gas generally falls into a developing potential minimum and is released only when the local minimum dissolves. In this case, the densest gas is coincident with the spiral potential, rather than offset as in the grand-design spirals. We would there fore expect no offset between the spiral shock and star formation, and no obvious co-rotation radius. Spurs which occur in grand-design spirals when large clumps are sheared off leaving the spiral arms, are rare in the active, time-evolving spiral reported here. Instead, large branches are formed from spiral arms when the underlying spiral potential is dissolving due to the N-body dynamics. We find that the molecular cloud mass spectrum for the active potential is similar to that for clouds in grand design calculations, depending primarily on the ambient pressure rather than the nature of the potential. The largest molecular clouds occur when spiral arms collide, rather than by agglomeration within a spiral arm.
description: 11 pages, 7 figures, accepted for publication in MNRAS
Dirac neutrinos and $N_{\rm eff}$ II: the freeze-in case
Creators: name: Luo, Xuheng
name: Rodejohann, Werner
name: Xu, Xun-Jie
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We discuss Dirac neutrinos whose right-handed component $ν_R$ has new interactions that may lead to a measurable contribution to the effective number of relativistic neutrino species $N_{\rm eff}$. We aim at a model-independent and comprehensive study on a variety of possibilities. Processes for $ν_R$-genesis from decay or scattering of thermal species, with spin-0, spin-1/2, or spin-1 initial or final states are all covered. We calculate numerically and analytically the contribution of $ν_R$ to $N_{\rm eff}$ primarily in the freeze-in regime, since the freeze-out regime has been studied before. While our approximate analytical results apply only to freeze-in, our numerical calculations work for freeze-out as well, including the transition between the two regimes. Using current and future constraints on $N_{\rm eff}$, we obtain limits and sensitivities of CMB experiments on masses and couplings of the new interactions. As a by-product, we obtain the contribution of Higgs-neutrino interactions, $ΔN_{\rm eff}^{\rm SM} \approx 7.5\times10^{-12}$, assuming the neutrino mass is 0.1 eV and generated by the standard Higgs mechanism.
description: 29 pages, 6 figures, comments on non-thermal distributions added, JCAP published version
About the role of 2D screening in High Temperature Superconductivity
Creators: name: Vazquez-Ponce, Yosdanis
name: Aguero, David Oliva
name: de Oca, Alejandro Cabo Montes
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The 2D screening is investigated in a simple single band square tight-binding model which qualitatively resembles the known electronic structure in high temperature superconductors. The Coulomb kernel for the two particle Bethe-Salpeter equation in the single loop (RPA) approximation for the polarization can be evaluated in a strong tight binding limit. The results indicate an intense screening of the Coulomb repulsion between the particles, which becomes stronger and anisotropic when the Fermi level approach half filling (or equivalently, when the Fermi surface approach the Van Hove singularities) and rapidly decreases away it. The effect is also more pronounced for quasi-momenta regions near the corners of the Brillouin cell, which correspond to dual spatial distances of the order few unit cells. Therefore, a possible mechanism is identified which could explain the existence of extremely small Cooper pairs in these materials, as bounded anisotropic composites joined by residual super-exchange or phonon interactions.
description: 16 pages, 4 figures, presented in the " Conference on Strongly Interacting Systems at the Nanoscale", ICTP, Trieste, Italy (8-12 August 2005)
DIE BEDEUTUNG DER LANDWIRTSCHAFT AUF DEM ARBEITSMARKT IM KONTEXT WIRTSCHAFTSRAUMLICHER DISPARITATEN-ERGEBNISSE EINER PANEL-ANALYSE (German)
Creators: name: Harsche, Johannes
name: Harsche, Johannes
Publisher: name: Unknown
Year: 2007
Subjects: subject: Regionalanalyse
subject: Agrarstruktureller Wandel
subject: Arbeitsmarktökonomik
subject: Panel-Modelle
subject: Erwerbsverhalten

description: Eine Analyse der jüngeren Entwicklung der hessischen Agrarstruktur zeigt, dass diese während der vergangenen fünf Jahrzehnte durch eine erhebliche Abnahme der Anzahl der landwirtschaftlichen Betriebe und des Beschäftigtenanteils des Agrarsektors gekennzeichnet war. Zum Zwecke einer theoretischen Erklärung dieses Strukturwandels lässt sich mit Hilfe eines Zwei-Sektoren-Modells die Arbeitsallokation auf zwei unterschiedliche Wirtschaftsbereiche erklären. Zur empirischen Überprüfung der theoretischen Überlegungen wurden mit Hilfe eines Panel-Modells, das auf Daten aus den 26 hessischen Land- und Stadtkreisen bzw. sechs Bezugsjahren aus einem zwanzigjährigen Untersuchungszeitraum basiert, Kausalbeziehungen zwischen exogenen Variablen der Agrarstruktur und der allgemeinen Wirtschaftsstruktur einerseits und endogenen Variablen der landwirtschaftlichen Erwerbstruktur andererseits aufgezeigt. Offenbar hat eine Erhöhung des nichtlandwirtschaftlichen Referenzlohnes eine Verringerung sowohl der Dichte der landwirtschaftlichen Betriebe als auch des Beschäftigtenanteils des Agrarsektors zur Folge. Zudem ist die regionale Bedeutung der Landwirtschaft auf den Arbeitsmärkten um so höher, je größer der Anteil des Grünlandes an der landwirtschaftlich genutzten Fläche und je bedeutsamer die Fremdenverkehrswirtschaft ist.
Dipole Deformations of N=1 SYM and Supergravity backgrounds with U(1) X U(1) global symmetry
Creators: name: Gursoy, Umut
name: Nunez, Carlos
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study SL(3,R) deformations of a type IIB background based on D5 branes that is conjectured to be dual to N=1 SYM. We argue that this deformation of the geometry correspond to turning on a dipole deformation in the field theory on the D5 branes. We give evidence that this deformation only affects the KK-sector of the dual field theory and helps decoupling the KK dynamics from the pure gauge dynamics. Similar deformations of the geometry that is dual to N=2 SYM are studied. Finally, we also study a deformation that leaves us with a possible candidate for a dual to N=0 YM theory.
description: 41 pages plus appendices. References added and typos corrected
Atomic calculations of hyperfine structure anomaly in gold
Creators: name: Demidov, Yu. A.
name: Konovalova, E. A.
name: Imanbaeva, R. T.
name: Kozlov, M. G.
name: Barzakh, A. E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The magnetic hyperfine structure constants have been calculated for low-lying levels in neutral gold atom and gold-like ion of mercury taking into account Bohr--Weisskopf (BW) effect. BW effect is represented as a product of atomic and nuclear ($d_\mathrm{nuc}$) factors. We have calculated the atomic factors, which enable one to extract BW-correction values for far from stability gold nuclei from the experimental data. The possible uncertainty of our atomic calculations have been estimated by the comparison with the available experimental data. It has been shown that the standard single-particle approach in $d_\mathrm{nuc}$ calculation reasonably well describes experimental data for $11/2^-$ gold isomers and $3/2^+$ ground state of $\rm ^{199}Au$. At the same time, it fails to describe the hyperfine constant in $^{197}\mathrm{Au}$. This indicates the more pronounced configuration mixing in $\rm ^{197}Au$ than in $\rm ^{199}Au$.
ASYMMETRIC PRICE TRANSMISSION IN THE ISRAELI CITRUS EXPORT SECTOR IN THE AFTERMATH OF LIBERALIZATION
Creators: name: Goetz, Linde
name: Von Cramon-Taubadel, Stephan
name: Goetz, Linde
name: Von Cramon-Taubadel, Stephan
Publisher: name: Unknown
Year: 2007
Subjects: Crop Production/Industries
International Relations/Trade

description: The Israeli citrus export sector was liberalized in 1991 with the aim to increase citrus growers' income and to improve overall efficiency of the international citrus marketing channel. However, the former government export monopoly's activities were mainly taken over by four large companies accounting for over 90% of total Israeli citrus market exports. In addition, citrus exporters maintained the monopoly's consignment system, substantially limiting transparency on how the grower price is determined. This lead the government to intervene in the newly liberalized market by implementing a minimum price agreement in the 1994/95 season to protect citrus growers against exporters' abuse of market power. In this paper we analyze whether market power was exerted by exporting companies over citrus growers in the form of asymmetric price transmission. Our study is unique in that it investigates vertical price transmission across international borders, i.e. in the context of Israeli grapefruit exports to France. We explicitly account for possible changes in exporters' pricing behaviour in the post-liberalization period. We apply an error correction model (ECM) to disaggregated firm-level Israeli grower price and French import price data. An ECM is estimated individually for each of the major exporting companies within a seemingly unrelated regression (SUR) framework. We find asymmetric price transmission in the first years after liberalisation, but symmetry in the second half of the 1990s. Our results indicate that growers' losses due to asymmetry amounted to as much as 2.5% of their total revenues. Our results suggest that liberalization improved the efficiency of the Israeli citrus international marketing channel, but that this took time and was probably accelerated by government intervention.
Conserving many body approach to the fully screened, infinite U Anderson model
Creators: name: Lebanon, Eran
name: Rech, Jerome
name: Coleman, P.
name: Parcollet, Olivier
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Using a Luttinger Ward scheme for interacting gauge particles, we present a conserving many body treatment of a family of fully screened infinite U Anderson models that has a smooth cross-over into the Fermi liquid state, with a finite scattering phase shift at zero temperature and a Wilson ratio greater than one. We illustrate our method, computing the temperature dependence of the thermodynamics, resistivity and electron dephasing rate and discuss its future application to non-equilibrium quantum dots and quantum critical mixed valent systems.
Asymptotic Freedom: From Paradox to Paradigm
Creators: name: Wilczek, Frank
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Asymptotic freedom was developed as a response to two paradoxes: the weirdness of quarks, and in particular their failure to radiate copiously when struck; and the coexistence of special relativity and quantum theory, despite the apparent singularity of quantum field theory. It resolved these paradoxes, and catalyzed the development of several modern paradigms: the hard reality of quarks and gluons, the origin of mass from energy, the simplicity of the early universe, and the power of symmetry as a guide to physical law.
description: 26 pages, 10 figures. Lecture on receipt of the 2004 Nobel Prize. v2: typo (in Ohm's law) corrected
Back-reaction in canonical analogue black holes
Creators: name: Liberati, Stefano
name: Tricella, Giovanni
name: Trombettoni, Andrea
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the back-reaction associated with Hawking evaporation of an acoustic canonical analogue black hole in a Bose-Einstein condensate. We show that the emission of Hawking radiation induces a local back-reaction on the condensate, perturbing it in the near-horizon region, and a global back-reaction in the density distribution of the atoms. We discuss how these results produce useful insights into the process of black hole evaporation and its compatibility with a unitary evolution.
description: This article belongs to the Special Issue Analogue Gravitational Dynamics
Exploring the Kinematics of the Oxygen-Rich Supernova Remnant G292.0+1.8: Ejecta Shells, Fast-Moving Knots and Shocked Circumstellar Material
Creators: name: Ghavamian, Parviz
name: Hughes, John P.
name: Willliams, T. B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results of an in-depth optical study of the core collapse supernova remnant G292.0+1.8 using the Rutgers Fabry-Perot (RFP) imaging spectrometer. Our observations provide a detailed picture of the supernova remnant in the emission lines of [O III] 5007, Halpha and [N II] 6548. The [O III] Fabry-Perot scans reveal a bright crescent-shaped spur of previously known high-velocity (V_radial ~ 1500 km/s) O-rich ejecta located on the eastern side of the remnant. The spur consists of a semi-coherent structure of mostly redshifted material, along with several clumps that have apparently broken out of the more orderly shell-like expansion. The high velocity (>= 600 km/s) component of the spur also displays a scalloped morphology characteristic of Rayleigh-Taylor instabilities. We also find a large number of fast-moving knots (FMKs) of O-rich ejecta undetected in prior photographic plate images and similar to features seen in Cas A. The position-velocity distribution of the FMKs can be kinematically described as a shell 3.4' in radius expanding at a velocity of 1700 km/s. Another feature apparent in the [O III] scans is an equatorial belt consisting of both a bar-like structure at zero radial velocity and a clumpy, high velocity ejecta component seen in projection along the line of sight. The bar is also detected in our Halpha RFP images at zero radial velocity, providing further evidence that this structure is of circumstellar origin. We find that the optical and X-ray properties of the bar are consistent with incomplete (partially radiative) shocks in material of moderate densities. Assuming a distance of 6 kpc for G292.0+1.8, we estimate a kinematic age of (3000-3400) d_6 years for this remnant (Abridged).
description: Submitted to ApJ, 22 pages, 14 figures. Revised version after referee's report
Reducing orbital eccentricity in initial data of black hole--neutron star binaries in the puncture framework
Creators: name: Kyutoku, Koutarou
name: Kawaguchi, Kyohei
name: Kiuchi, Kenta
name: Shibata, Masaru
name: Taniguchi, Keisuke
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We develop a method to compute low-eccentricity initial data of black hole--neutron star binaries in the puncture framework extending previous work on other types of compact binaries. In addition to adjusting the orbital angular velocity of the binary, the approaching velocity of a neutron star is incorporated by modifying the helical Killing vector used to derive equations of the hydrostationary equilibrium. The approaching velocity of the black hole is then induced by requiring the vanishing of the total linear momentum of the system, differently from the case of binary black holes in the puncture framework where the linear momentum of each black hole is specified explicitly. We successfully reduce the orbital eccentricity to
description: 15 pages, 9 figures
Octonionic Version of Dirac Equations
Creators: name: Gogberashvili, Merab
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is shown that a simple continuity condition in the algebra of split octonions suffices to formulate a system of differential equations that are equivalent to the standard Dirac equations. In our approach the particle mass and electro-magnetic potentials are part of an octonionic gradient function together with the space-time derivatives. As distinct from previous attempts to translate the Dirac equations into different number systems here the wave functions are real split octonions and not bi-spinors. To formulate positively defined probability amplitudes four different split octonions (transforming into each other by discrete transformations) are necessary, rather then two complex wave functions which correspond to particles and antiparticles in usual Dirac theory.
description: Version accepted by Int. J Mod. Phys
Commutants of von Neumann Correspondences and Duality of Eilenberg-Watts Theorems by Rieffel and by Blecher
Creators: name: Skeide, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46L08, 46L10, 46L53, 46M05

description: The category of von Neumann correspondences from B to C (or von Neumann B-C-modules) is dual to the category of von Neumann correspondences from C' to B' via a functor that generalizes naturally the functor that sends a von Neumann algebra to its commutant and back. We show that under this duality, called commutant, Rieffel's Eilenberg-Watts theorem (on functors between the categories of representations of two von Neumann algebras) switches into Blecher's Eilenberg-Watts theorem (on functors between the categories of von Neumann modules over two von Neumann algebras) and back.
description: 20 pages
Algebraic Tensor Products Revisited: Axiomatic Approach
Creators: name: Kubrusly, C. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46M05, 47A80, 15A63

description: This is an expository paper on tensor products where the standard approaches for constructing concrete instances of algebraic tensor products of linear spaces, via quotient spaces or via linear maps of bilinear maps, are reviewed by reducing them to different but isomorphic interpretations of an abstract notion, viz., the universal property, which is based on a pair of axioms.
Two Rydberg-dressed atoms escaping from an open well
Creators: name: Dobrzyniecki, Jacek
name: Sowiński, Tomasz
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: A comprehensive analysis of the dynamics of two Rydberg-dressed particles (bosons or fermions) tunneling from a potential well into open space is provided. We show that the dominant decay mechanism switches from sequential tunneling to pair tunneling when the interaction strength is tuned below a certain critical value. These critical values can be modified by tuning the effective range of the interaction potential. By comparing the dynamics for bosons and fermions, we show that there are significant differences between the two cases. In particular, increasing the interaction range modifies the tunneling rate in opposite ways for fermions and bosons. Furthermore, for the fermionic system much stronger attractive interactions are needed to achieve pair tunneling. The results provide insight into the dynamics of tunneling systems and, in light of recent realizations of tunneling few-body systems and Rydberg dressing of atoms, they offer promise for future experiments.
description: 16 pages, 13 figures
Massive Protoplanetary Disks in the Trapezium Region
Creators: name: Eisner, J. A.
name: Carpenter, John M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (abridged) We determine the disk mass distribution around 336 stars in the young Orion Nebula cluster by imaging a 2.5' x 2.5' region in 3 mm continuum emission with the Owens Valley Millimeter Array. For this sample of 336 stars, we observe 3 mm emission above the 3-sigma noise level toward ten sources, six of which have also been detected optically in silhouette against the bright nebular background. In addition, we detect 20 objects that do not correspond to known near-IR cluster members. Comparisons of our measured fluxes with longer wavelength observations enable rough separation of dust emission from thermal free-free emission, and we find substantial dust emission toward most objects. For the ten objects detected at both 3 mm and near-IR wavelengths, eight exhibit substantial dust emission. Excluding the high-mass stars and assuming a gas-to-dust ratio of 100, we estimate circumstellar masses ranging from 0.13 to 0.39 Msun. For the cluster members not detected at 3 mm, images of individual objects are stacked to constrain the mean 3 mm flux of the ensemble. The average flux is detected at the 3-sigma confidence level, and implies an average disk mass of 0.005 Msun, comparable to the minimum mass solar nebula. The percentage of stars in Orion surrounded by disks more massive than ~0.1 Msun is consistent with the disk mass distribution in Taurus, and we argue that massive disks in Orion do not appear to be truncated through close encounters with high-mass stars. Comparison of the average disk mass and number of massive dusty structures in Orion with similar surveys of the NGC 2024 and IC 348 clusters constrains the evolutionary timescales of massive circumstellar disks in clustered environments.
description: 27 pages, including 7 figures. Accepted by ApJ
Why the Universe Started from a Low Entropy State
Creators: name: Holman, R.
name: Mersini-Houghton, L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that the inclusion of backreaction of massive long wavelengths imposes dynamical constraints on the allowed phase space of initial conditions for inflation, which results in a superselection rule for the initial conditions. Only high energy inflation is stable against collapse due to the gravitational instability of massive perturbations. We present arguments to the effect that the initial conditions problem {\it cannot} be meaningfully addressed by thermostatistics as far as the gravitational degrees of freedom are concerned. Rather, the choice of the initial conditions for the universe in the phase space and the emergence of an arrow of time have to be treated as a dynamic selection.
description: 12 pages, 2 figs. Final version; agrees with accepted version in Phys. Rev. D
The different shapes of spin textures as a journey through Brillouin zone chiral and polar symmetries
Creators: name: Acosta, Carlos Mera
name: Yuan, Linding
name: Dalpian, Gustavo M.
name: Zunger, Alex
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Crystallographic space group symmetry (CPGS) such as polar and nonpolar crystal classes have long been known to classify compounds that have spin-orbit-induced spin splitting. While taking a journey through the Brillouin Zone (BZ) from one k-point to another for a fixed CPGS, it is expected that the wavevector point group symmetry (WPGS) can change, and consequently a qualitative change in the texture of the spin polarization (the expectation value of spin operator $\vec{S}^{nk_{0}}$ in Bloch state $u(n,k)$ and the wavevector $k_0$). However, the nature of the spin texture (ST) change is generally unsuspected. In this work, we determine a full classification of the linear-in-$k$ spin texture patterns based on the polarity and chirality reflected in the WPGS at $k_0$. The spin-polarization vector $\vec{S}^{nk_{0}}$ controlling the ST is bound to be parallel to the rotation axis and perpendicular to the mirror planes and hence, symmetry operation types in WPGSs impose symmetry restriction to the ST. For instance, the ST is always parallel to the wavevector $k$ in non-polar chiral WPGSs since they contain only rotational symmetries. Some consequences of the ST classification based on the symmetry operations in the WPGS include the observation of ST patterns that are unexpected according to the symmetry of the crystal. For example, it is usually established that spin-momentum locking effect requires the crystal inversion symmetry breaking by an asymmetric electric potential. However, we find that polar WPGS can have this effect even in compounds without electric dipoles or external electric fields. We use the determined relation between WPGS and ST as a design principle to select compounds with multiple ST near band edges at different $k$-valleys. Based on high-throughput calculations for 1481 compounds, we find 37 previously fabricated materials with different ST near band edges.
description: 28 pages and 9 figures
Publication Standards in Chemistry and Beyond
Creators: name: Nicole A. Parks
name: Tilmann G. Fischer
name: Sonja Herres-Pawlis
name: Steffen Neumann
Publisher: name: Zenodo
Year: 2023
Subjects: research data management
metadata
publication standards
standards
NFDI4Chem

description: This poster aims to outline NFDI4Chem’s efforts on Publication Standards, while fostering exchange on similar work beyond the realm of chemistry. We present results of our most recent pilot with a scientific publisher connected to past but ongoing work involving (1) the Editors4Chem Workshop, (2) a wide-scale study on how journals’ author guidelines support FAIR and open sciences practices, and (3) the work in pilot projects to enhance the appreciation of data publications and to support data publishing by researchers through the publishers’ manuscript submission processes. This pilot aims  to improve how journals link articles to their respective datasets at a technical (metadata) level (F2, I3). Based on these aspects, we also aim to initiate cross-consortia collaborations with our poster at CoRDI to identify opportunities for cross-disciplinary knowledge transfer on domain-independent aspects of publication standards.
Local Phase Space - Shaped by Chaos?
Creators: name: Chakrabarty, Dalia
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We attempt to understand the state of the local phase space by comparing simulated 2-D velocity distributions to the distribution that is constructed for the solar neighbourhood, from measurements of stellar radial and transverse velocities. The joint perurbation of the central bar in the Galaxy and the spiral pattern is found to be a must, in order to produce successful models of the local phase space. The existence of chaos is found to be an important ingredient in the formation of the observed phase space structure.
description: 8 pages, 3 figures, proceedings of the conference: "Chaos in Astronomy", Athens, September 2007, G. Contopoulos and P.A. Patsis (eds), to be published by Springer
Isobaric analog state energy in deformed nuclei: a toy model
Creators: name: Roca-Maza, X.
name: Colo', G.
name: Sagawa, H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A formula to evaluate the effects of a general deformation on the Coulomb direct contribution to the energy of the Isobaric Analog State (IAS) is presented and studied via a simple yet physical model. The toy model gives a reasonable account of microscopic deformed Hartree-Fock-Bogolyubov (HFB) calculations in a test case, and provides a guidance when predicting unknown IAS energies. Thus, deformed HFB calculations, to predict the IAS energies, are performed for several neutron-deficient medium-mass and heavy nuclei which are now planned to be studied experimentally.
Fermionic zero modes in self-dual vortex background on a torus
Creators: name: Liu, Yu-Xiao
name: Wang, Yong-Qiang
name: Duan, Yi-Shi
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study fermionic zero modes in the self-dual vortex background on an extra two-dimensional Riemann surface in 5+1 dimensions. Using the generalized Abelian Higgs model, we obtain the inner topological structure of the self-dual vortex and establish the exact self-duality equation with topological term. Then we analyze the Dirac operator on an extra torus and the effective Lagrangian of four-dimensional fermions with the self-dual vortex background. Solving the Dirac equation, the fermionic zero modes on a torus with the self-dual vortex background in two simple cases are obtained.
description: 11 pages, no figures, published version
Quantum tomography with random diagonal unitary maps and statistical bounds on information generation using random matrix theory
Creators: name: PG, Sreeram
name: Madhok, Vaibhav
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study quantum tomography from a continuous measurement record obtained by measuring expectation values of a set of Hermitian operators obtained from unitary evolution of an initial observable. For this purpose, we consider the application of a random unitary, diagonal in a fixed basis at each time step and quantify the information gain in tomography using Fisher information of the measurement record and the Shannon entropy associated with the eigenvalues of covariance matrix of the estimation. Surprisingly, very high fidelity of reconstruction is obtained using random unitaries diagonal in a fixed basis even though the measurement record is not informationally complete. We then compare this with the information generated and fidelities obtained by application of a different Haar random unitary at each time step. We give an upper bound on the maximal information that can be obtained in tomography and show that a covariance matrix taken from the Wishart-Laguerre ensemble of random matrices and the associated Marchenko-Pastur distribution saturates this bound. We find that physically, this corresponds to an application of a different Haar random unitary at each time step. We show that repeated application of random diagonal unitaries gives a covariance matrix in tomographic estimation that corresponds to a new ensemble of random matrices. We analytically and numerically estimate eigenvalues of this ensemble and show the information gain to be bounded from below by the Porter-Thomas distribution.
description: 12 pages, 9 figures
Transcription of the narration of Reel #2 (collection LA 256)
Creators: name: Parker, Verdena
name: Kelly, Christine
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio file VP-150417-07: transcription of VP-180317-06 (narration of Reel #2 from the LA 256 collection at SCOIL, one of six reels of 8mm film created by Verdena in the 1960s, featuring scenes of everyday life around Hoopa Valley as well as Brush Dances). From 8:30 to 11:00. Due to re-numbering, Reel #2 has been assigned the CLA item number LA 256.041.
Angular Conductance Resonances of Quantum Dots Non-Collinearly Coupled to Ferromagnetic Leads
Creators: name: Fransson, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The zero bias conductance of quantum dots coupled to ferromagnetic leads is investigated. In the strong coupling regime, it is found that the conductance is a non-monotonic function of the angle between the magnetisation directions in the two contacts. This behaviour is an effect of the presence of the leads which induces an angle dependent spin split of the quantum dot states, and spin flip transitions between the quantum dot states whenever the magnetisation directions of the leads are non-collinear which enhances the current density at the chemical potential. In the weak coupling regime, the system reverts to normal spin valve character.
description: 4 pages, 4 figures. Europhysics Letters (accepted)
Ultrafast photoluminescence from Poly(p-phenylenevinylene)
Creators: name: McCutcheon, Murray
Publisher: name: University of British Columbia
Year: 2009

description: Femtosecond time-resolved photoluminescence spectroscopy is used to study the dynamics of poly(p-phenylenevinylene) (PPV) at 77K and 300K over an energy range 2.19-2.37 eV. At all emission energies studied, the photoluminescence excited by ~100 fs long pulses of 400 nm radiation rises to a maximum value in less than 1 ps and then monotonically decreases with increasing delay. The decay curves can all be described by the summation of two, or in some cases three, exponential functions. Analysis of the spectral dependence of the various time constants extracted from these fits indicates that the photoluminescence at any given wavelength is due in general to the superposition of three transitions emanating from a single set of inhomogeneously broadened excitons. The three distinct transitions correspond to processes in which two, one or zero phonons are excited in the host polymer during the emission event. A complete analysis of the data indicates that the lifetime of the inhomogeneously broadened excitons is found to increase monotonically from a value less than the 300 fs time resolution of our system at 330 meV above the peak in the density of states (DOS), to 116 ps at an energy 7 meV below the peak in the DOS.