cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Fast and Simple Algorithm for Detecting Large Scale Structures
Creators: name: Pillastrini, Giovanni C. Baiesi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Aims: we propose a gravitational potential method (GPM) as a supercluster finder based on the analysis of the local gravitational potential distribution measured by fast and simple algorithm applied to a spatial distribution of mass tracers. Methodology: the GPM performs a two-step exploratory data analysis: first, it measures the comoving local gravitational potential generated by neighboring mass tracers at the position of a test point-like mass tracer. The computation extended to all mass tracers of the sample provides a detailed map of the negative potential fluctuations. The most negative gravitational potential is provided by the highest mass density or, in other words, the deeper is a potential fluctuations in a certain region of space and denser are the mass tracers in that region. Therefore, from a smoothed potential distribution, the deepest potential well detects unambiguously a high concentration in the mass tracer distribution. Second, applying a density contrast criterion to that mass concentration, a central bound core may be identify and quantify in terms of memberships and total mass. Results: using a complete volume-limited sample of galaxy clusters, a huge concentration of galaxy clusters has been detected. In its central region, 35 clusters seem to form a massive and bound core enclosed in a spherical volume of 51 Mpc radius. Conclusions: the substantial agreement of our findings compared with those obtained by different methodologies, confirms the GPM as a straightforward and powerful as well as fast cluster finder useful for analyzing large datasets.
description: 13 pages, 3 figures
NGC 2579 and the carbon and oxygen abundance gradients beyond the solar circle
Creators: name: Esteban, C.
name: Carigi, L.
name: Copetti, M. V. F.
name: García-Rojas, J.
name: Mesa-Delgado, A.
name: Castañeda, H. O.
name: Péquignot, D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present deep echelle spectrophotometry of the Galactic HII region NGC 2579. The data have been taken with the Very Large Telescope Ultraviolet-Visual Echelle Spectrograph in the 3550--10400 Å range. This object, which has been largely neglected, shows however a rather high surface brightness, a high ionization degree and is located at a galactocentric distance of 12.4 $\pm$ 0.7 kpc. Therefore, NGC 2579 is an excellent probe for studying the behaviour of the gas phase radial abundance gradients in the outer disc of the Milky Way. We derive the physical conditions of the nebula using several emission line-intensity ratios as well as the abundances of several ionic species from the intensity of collisionally excited lines. We also determine the ionic abundances of C$^{2+}$, O$^+$ and O$^{2+}$ -- and therefore the total O abundance -- from faint pure recombination lines. The results for NGC 2579 permit to extend our previous determinations of the C, O and C/O gas phase radial gradients of the inner Galactic disc (Esteban etal. 2005) to larger galactocentric distances. We find that the chemical composition of NGC 2579 is consistent with flatten gradients at its galactocentric distance. In addition, we have built a tailored chemical evolution model that reproduces the observed radial abundance gradients of O, C and N and other observational constraints. We find that a levelling out of the star formation efficiency about and beyond the isophotal radius can explain the flattening of chemical gradients observed in the outer Galactic disc.
description: 10 pages, 5 figures. Accepted for publication in Monthly Notices of the Royal Astronomical Society
Autonomous parafoil precision landing using convex real-time optimized guidance and control
Creators: name: Leeman, Antoine
name: Preda, Valentin
name: Huertas, Irene
name: Bennani, Samir
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: To overcome the limitations of current parafoil precision landing capabilities, an efficient real-time convex optimized guidance and control strategy is presented. Successive convexification of the parafoil guidance problem guarantees local optimality with polynomial convergence rate for efficient real-time implementation, where each iteration is dynamically feasible. Our approach shows reliable and fast numerical convergence through in-flight recalculation of time of flight and a new optimal trajectory to cope with time-varying dynamics. The efficiency of our strategy is demonstrated via a comparative analysis of the existing X-38 in-flight demonstrated guidance and control system. Exhaustive Monte-Carlo simulations show performance improvements of about one order of magnitude. The concept proposed is simple, yet general, as it scales to any atmospheric parafoil landing system and allows efficient implementation relying only on the turn rate information.
Egdon Heath
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2017

description: The music of "Egdon Heath," inspired by Thomas Hardy's The Return of the Native, is elusive and unpredictable. Its three main elements are set out at the beginning-a pulseless wandering melody, first for double basses and then all the strings, a sad brass processional and restless music for strings and oboe. All three intertwine and transmute, eventually coming to rest with music of desolation, out of which emerges a ghostly dance, the strangest moment in a strange work. After this comes a resolution of sorts, and the ending, though hardly conclusive, gives the impression of an immense journey achieved, even though "Egdon Heath" lasts no more than 12 minutes.
D2.2 - First Report of the Ethics Advisory Board
Creators: name: Lea, Nathan
name: Kalra, Dipak
Publisher: name: Zenodo
Year: 2022

description: This deliverable provides the first report of the GenoMed4All Ethical Advisory Board (EAB). The report has been compiled after the first meeting of the Ethical Advisory Board held on 19th January 2022. The meeting was presented with the current position with regards the project objectives and progress, data protection and ethics oversight and assessments for the project.
Die bronzenen Rasiermesser in Jugoslawien, Rumänien und Ungarn
Creators: name: Weber, Claus
Publisher: name: DGUF e.V.
Year: 2017

description: [nicht vorhanden / not available]
description: Archäologische Informationen, Bd. 6, Nr. 2 (1983): Archäologische Informationen
Studies on some exponential-screened Coulomb potentials
Creators: name: Roy, Amlan K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The generalized pseudospectral method is employed to study the bound-state spectra of some of the exponentially screened Coulomb potentials, \emph{viz.}, the exponential cosine screened Coulomb (ECSC) and general exponential screened Coulomb (GESC) potential, with special emphasis on \emph{higher} states and \emph{stronger} interaction. Eigenvalues accurate up to eleven significant figures are obtained through a non-uniform optimal spatial discretization of the radial Schrödinger equation. All the 55 eigenstates of ECSC potential with $n \le 10$ and 36 eigenstates of GESC potential with $n \le 8$ are considered for arbitrary values of the screening parameter, covering a wide range of interaction. Excited states as high as up to $n=18$ have been computed with high accuracy for the first time. Excellent agreement with the literature data has been observed in all cases. All the GESC eigenstates are calculated with much greater accuracy than the existing methods available in literature. Many $l \ne 0$ states of this potential are reported here. In both cases, a detailed variation of energies with respect to the parameters in potential is monitored.
description: 15 pages, 5 tables, 2 figures
Cajsa S. Lund, Fornnordiska klanger / The Sounds of Prehistorie Scandinavia, Stockholm 1984
Creators: name: Hickmann, Ellen
Publisher: name: DGUF e.V.
Year: 2017

description: Rezension zu: Cajsa S. Lund, Fornnordiska klanger / The Sounds of Prehistorie Scandinavia, MUSICA SVECIAE MS 101, LP mit 41 Klangbeispielen.
Beiheft mit Texten in schwedischer und englischer Sprache, Tabellen, Fotos, technischen Zeichnungen, Namensregistern; EMI 1361031, Stockholm 1984)
description: Archäologische Informationen, Bd. 9, Nr. 1 (1986): Archäologische Informationen
Parametric G-computation for Compatible Indirect Treatment Comparisons with Limited Individual Patient Data
Creators: name: Remiro-Azócar, Antonio
name: Heath, Anna
name: Baio, Gianluca
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Population adjustment methods such as matching-adjusted indirect comparison (MAIC) are increasingly used to compare marginal treatment effects when there are cross-trial differences in effect modifiers and limited patient-level data. MAIC is based on propensity score weighting, which is sensitive to poor covariate overlap and cannot extrapolate beyond the observed covariate space. Current outcome regression-based alternatives can extrapolate but target a conditional treatment effect that is incompatible in the indirect comparison. When adjusting for covariates, one must integrate or average the conditional estimate over the relevant population to recover a compatible marginal treatment effect. We propose a marginalization method based on parametric G-computation that can be easily applied where the outcome regression is a generalized linear model or a Cox model. The approach views the covariate adjustment regression as a nuisance model and separates its estimation from the evaluation of the marginal treatment effect of interest. The method can accommodate a Bayesian statistical framework, which naturally integrates the analysis into a probabilistic framework. A simulation study provides proof-of-principle and benchmarks the method's performance against MAIC and the conventional outcome regression. Parametric G-computation achieves more precise and more accurate estimates than MAIC, particularly when covariate overlap is poor, and yields unbiased marginal treatment effect estimates under no failures of assumptions. Furthermore, the marginalized regression-adjusted estimates provide greater precision and accuracy than the conditional estimates produced by the conventional outcome regression, which are systematically biased because the measure of effect is non-collapsible.
description: 31 pages, 4 figures, 1 Table (19 additional pages in the Supplementary Material). This is the journal version of some of the research in the working paper arXiv:2008.05951. Accepted for publication by Research Synthesis Methods
Neue Wege im Lateinunterricht? Zur praktischen Umsetzung der Kompetenzorientierung am Beispiel der Metamorphosen Ovids
Creators: name: Münzner, Iris
Publisher: name: Pegasus-Onlinezeitschrift
Year: 2017

description: Iris Münzner untersucht in ihrem Aufsatz ein Lektüreprojekt zu den Metamorphosen Ovids. Dabei steht die Frage im Zentrum, in welchem Maß und in welcher Weise das Projekt die Anforderungen eines kompetenzorientierten Unterrichts umsetzt. Nach einer ausführlichen Analyse des Materials, bei der sie auch Erkenntnisse und Forderungen aktueller Literatur zum Thema Kompetenz mit einbezieht, macht Iris Münzner Verbesserungsvorschläge und stellt eigens ausgearbeitete Materialien vor.
description: Pegasus-Onlinezeitschrift, Bd. 13, Nr.1/2: Pegasus-Onlinezeitschrift
Influence of the Nucleon Hard Partons Distribution on J/ΨSuppression in a GMC Framework
Creators: name: Wang, Hongmin
name: Hou, Zhao-Yu
name: Sun, Xian-Jing
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: In a Glauber Monte Carlo framework, taking account of the transverse spatial distribution of hard partons in the nucleon, we analyse the nuclear modification factor $R_{dAu}$ for $J/ψ$ in d+Au collisions with the EPS09 shadowing parametrization. After the influence of nucleon hard partons distribution is considered, a clearly upward correction is revealed for the dependence of $R_{dAu}$ on $N_{coll}$ in peripheral d+Au collisions, however, an unconspicuous correction is shown for the results versus $p_{T}$. The theoretical results are in good agreement with the experimental data from PHENIX.
description: 7pages,2figures
Adiabatic quantum pumping in graphene with magnetic barriers
Creators: name: Grichuk, E.
name: Manykin, E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study an adiabatic quantum pump effect in a two terminal graphene device with two oscillating square electric barriers and a stationary magnetic barrier using the scattering matrix approach. The model employs the low-energy Dirac approximation and incorporates the possible existence of a finite band gap in graphene spectrum. We show that in this case valley-polarized and pure valley currents can be pumped due to the valley symmetry breaking. For a δ-function magnetic barrier we present analytical expressions for bilinear total and valley pumping responses. These results are compared to numerical ones for a double δ-function, a square and a triple square magnetic barriers.
Stability of Schwarzschild black holes in fourth-order gravity revisited
Creators: name: Myung, Yun Soo
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We revisit the classical stability of Schwarzschild black hole in fourth-order theories of gravity. On the contrary of the stability of this black hole, it turns out that the linearized perturbations exhibit unstable modes featuring the Gregory-Laflamme instability of five-dimensional black string. This shows clearly an instability of black hole in fourth-order gravity with $α=-β/3$.
description: 10 pages, no figures, version to appear in PRD
Polarization of $Λ$ and $\overlineΛ$ hyperons along the beam direction in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV
Creators: name: ALICE Collaboration
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The polarization of the $Λ$ and $\overlineΛ$ hyperons along the beam ($z$) direction, $P_{\rm z}$, has been measured in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02TeV recorded with ALICE at the Large Hadron Collider (LHC). The main contribution to $P_{\rm z}$ comes from elliptic flow induced vorticity and can be characterized by the second Fourier sine coefficient $P_{\rm z,s2} = \langle P_{\rm z} \sin(2φ- 2 Ψ_{\rm 2}) \rangle$, where $φ$ is the hyperon azimuthal emission angle, and $Ψ_{\rm 2}$ is the elliptic flow plane angle. We report the measurement of $P_{\rm z,\,{\rm s2}}$ for different collision centralities, and in the 30-50% centrality interval as a function of the hyperon transverse momentum and rapidity. The $P_{\rm z,\,{\rm s2}}$ is positive similarly as measured by the STAR Collaboration in Au-Au collisions at $\sqrt{s_{\rm NN}}$ = 200 GeV, with somewhat smaller amplitude in the semi-central collisions. This is the first experimental evidence of a non-zero hyperon $P_{\rm z}$ in Pb-Pb collisions at the LHC. The comparison of the measured $P_{\rm z,\,{\rm s2}}$ with the hydrodynamic model calculations shows sensitivity to the competing contributions from thermal and the recently found shear induced vorticity, as well as to whether the polarization is acquired at the quark-gluon plasma or the hadronic phase.
description: 18 pages, 4 captioned figures, authors from page 12, published version, figures at http://alice-publications.web.cern.ch/node/7262
Towards a double-scaling limit for tensor models: probing sub-dominant orders
Creators: name: Kaminski, Wojciech
name: Oriti, Daniele
name: Ryan, James P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The definition of a double-scaling limit represents an important goal in the development of tensor models. We take the first steps towards this goal by extracting and analysing the next-to-leading order contributions, in the 1/N expansion, for the IID tensor models. We show that the radius of convergence of the NLO series coincides with that of the leading order melonic sector. Meanwhile, the value of the susceptibility exponent at NLO is 3/2, signaling a departure from the leading order behaviour. Both pieces of information provide clues for a non-trivial double-scaling limit, for which we put forward some precise conjecture.
Quark Propagation in the Instantons of Lattice QCD
Creators: name: Trewartha, Amalie
name: Kamleh, Waseem
name: Leinweber, Derek
name: Roberts, Dale S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We quantitatively examine the extent to which instanton degress of freedom, contained within standard Monte-carlo generated gauge-field configurations, can maintain the characteristic features of the mass and renormalisation functions of the non-perturbative quark propagator. We use over-improved stout-link smearing to isolate instanton effects on the lattice. Using a variety of measures, we illustrate how gauge fields consisting almost solely of instanton-like objects are produced after only 50 sweeps of smearing. We find a full vacuum, with a packing fraction more than three times larger than phenomenological models predict. We calculate the overlap quark propagator on these smeared configurations, and find that even at high levels of smearing the majority of the characteristic features of the propagator are reproduced. We thus conclude that instantons contained within standard Monte-carlo generated gauge-field configurations are the degrees of freedom responsible for the dynamical generation of mass observed in lattice QCD.
On matrix Painlevé-4 equations. Part 1: Painlevé--Kovalevskaya test
Creators: name: Bobrova, Irina
name: Sokolov, Vladimir
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Using the Painlevé--Kovalevskaya test, we find several new matrix generalizations of the Painlevé-4 equation. Some limiting transitions reduce them to known matrix Painlevé-2 equations.
Superstripes : superconductivity in complex granular striped matter
Creators: name: Bianconi, Antonio
name: Innocenti, Davide
name: Campi, Gaetano
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The role of phase separation and superstripes in high temperature superconductors and related materials has been discussed at the meeting in Erice, Italy, July 11 July 17, 2012. The focus was on the point where we are after 25 years of research on the key role of complex structural, electronic, and magnetic matter in the mechanism of high temperature superconductivity.
description: 9 pages, 3 figures, Preface for the Proceedings of the meeting SUPERSTRIPES 2012 on Phase Separation and superstripes in high temperature superconductors and related materials, Erice, Italy, July 11 2012
Space-borne gravitational wave detectors as time-delayed differential dynamometers
Creators: name: Congedo, Giuseppe
name: Dolesi, Rita
name: Hueller, Mauro
name: Vitale, Stefano
name: Weber, William J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The basic constituent of many space-borne gravitational missions, in particular for interferometric gravitational waves detectors, is the so-called link made out of a satellite sending an electromagnetic beam to a second satellite. We illustrate how, by measuring the time derivative of the frequency of the received beam, the link behaves as a differential, time-delayed dynamometer in which the effect of gravity is exactly equivalent to an effective differential force applied to the two satellites. We also show that this differential force gives an integrated measurement of curvature along the beam. Finally, we discuss how this approach can be implemented to benefit the data analysis of gravitational wave detectors.
description: 5 pages, 1 figure
Warkworth 12-m VLBI Station: WARK12M - 2012
Creators: name: Weston, Stuart
name: Takiguchi, Hiroshi
name: Natusch, Tim
name: Gulyaev, Sergei
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Warkworth 12-m Radio Telescope is operated by the Institute for Radio Astronomy and Space Research (IRASR) at AUT University, Auckland, New Zealand. This report briefly reviews the characteristics of the 12-m VLBI station. We report on a number of activities and technical developments.
description: 5 pages, 2 figures, 1 table
New limits on variation of the fine-structure constant using atomic dysprosium
Creators: name: Leefer, N.
name: Weber, C. T. M.
name: Cingöz, A.
name: Torgerson, J. R.
name: Budker, D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report on the spectroscopy of radio-frequency transitions between nearly-degenerate, opposite-parity excited states in atomic dysprosium (Dy). Theoretical calculations predict that these states are very sensitive to variation of the fine-structure constant, $α$, owing to large relativistic corrections of opposite sign for the opposite-parity levels. The near degeneracy reduces the relative precision necessary to place constraints on variation of $α$ competitive with results obtained from the best atomic clocks in the world. Additionally, the existence of several abundant isotopes of Dy allows isotopic comparisons that suppress common-mode systematic errors. The frequencies of the 754-MHz transition in $^{164}$Dy and 235-MHz transition in $^{162}$Dy were measured over the span of two years. Linear variation of $α$ is found to be $\dotα/α= (-5.8\pm6.9)\times10^{-17}$ yr$^{-1}$, consistent with zero. The same data are used to constrain the dimensionless parameter $k_α$, characterizing a possible coupling of $α$ to a changing gravitational potential. We find that $k_α= (-5.5\pm5.2)\times10^{-7}$, essentially consistent with zero and the best constraint to date.
description: 5 pages, 3 figures
Assessing Behavioral Intention of Outbound Travelers' Travel Bubbles Amid COVID-19 in Phnom Penh, Cambodia
Creators: name: Visothy So
Publisher: name: Assumption University
Year: 2023
Subjects: subject: Travel Bubbles
subject: Tourism
subject: FOS: Economics and business
subject: Behavioral Intention
subject: COVID-19
subject: Cambodia

description: AU-GSB e-Journal, 16, 1, 131-139
Rotational threshold in global numerical dynamo simulations
Creators: name: Schrinner, Martin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Magnetic field observations of low-mass stars reveal an increase of magnetic activity with increasing rotation rate. The so-called activity-rotation relation is usually attributed to changes in the underlying dynamo processes generating the magnetic field. We examine the dependence of the field strength on rotation in global numerical dynamo models and interpret our results on the basis of energy considerations. In agreement with the scaling law proposed by Christensen & Aubert (2006), the field strength in our simulations is set by the fraction of the available power used for the magnetic field generation. This is controlled by the dynamo efficiency calculated as the ratio of Ohmic to total dissipation in our models. The dynamo efficiency grows strongly with increasing rotation rate at a Rossby number of 0.1 until it reaches its upper bound of one and becomes independent of rotation. This gain in efficiency is related to the strong rotational dependence of the mean electromotive force in this parameter regime. For multipolar models at Rossby numbers clearly larger than 0.1, on the other hand, we do not find a systematic dependence of the field strength on rotation. Whether the enhancement of the dynamo efficiency found in our dipolar models explains the observed activity-rotation relation needs to be further assessed.
description: 6 pages, 4 figures
Weak Pontryagin's Maximum Principle for Optimal Control Problems Involving a General Analytic Kernel
Creators: name: Ndairou, Faical
name: Torres, Delfim F. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 26A33, 49K15

description: We prove a duality relation and an integration by parts formula for fractional operators with a general analytical kernel. Based on these basic results, we are able to prove a new Gronwall's inequality and continuity and differentiability of solutions of control differential equations. This allow us to obtain a weak version of Pontryagin's maximum principle. Moreover, our approach also allow us to consider mixed problems with both integer and fractional order operators and derive necessary optimality conditions for isoperimetric variational problems and other problems of the calculus of variations.
description: This is a preprint whose final form is published by Elsevier in the book 'Fractional Order Systems and Applications in Engineering'. Submitted 10/Sept/2020; Revised 22/Nov/2020 and 18/May/2021; Accepted 05/Sept/2021
Light-Induced Control of Magnetic Phases in Kitaev Quantum Magnets
Creators: name: Sriram, Adithya
name: Claassen, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Leveraging coherent light-matter interaction in solids is a promising new direction towards control and functionalization of quantum materials, to potentially realize regimes inaccessible in equilibrium and stabilize new or useful states of matter. We show how driving the strongly spin-orbit coupled proximal Kitaev magnet $α$-RuCl$_3$ with circularly-polarized light can give rise to a novel ligand-mediated magneto-electric effect that both photo-induces a large dynamical effective magnetic field and dramatically alters the interplay of competing isotropic and anisotropic exchange interactions. We propose that tailored light pulses can nudge the material towards the elusive Kitaev quantum spin liquid as well as probe competing magnetic instabilities far from equilibrium, and predict that the transient competition of magnetic exchange processes can be readily observed via pump-probe spectroscopy.
description: 14 pages, 9 figures
Neutrino mass spectrum from the seesaw extension
Creators: name: Jurciukonis, Darius
name: Gajdosik, Thomas
name: Juodagalvis, Andrius
name: Sabonis, Tomas
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The smallness of the neutrino masses can be well understood within the seesaw mechanism. We analyse two cases of the minimal extension of the standard model when one or two right-handed fields are added to the three left-handed fields. A second Higgs doublet is included in our model. We calculate the one-loop radiative corrections to the mass parameters which produce mass terms for the neutral leptons. In both cases we numerically analyse light neutrino masses as functions of the heavy neutrinos masses. Parameters of the model are varied to find light neutrino masses that are compatible with experimental data of solar $Δm^2_\odot$ and atmospheric $Δm^2_\mathrm{atm}$ neutrino oscillations for normal and inverted hierarchy.
description: Submitted to the proceedings of "International Symposium on Multiparticle Dynamics", Kielce, Poland, 16-21 September 2012. arXiv admin note: text overlap with arXiv:1212.5370
Ein silber- und messingtauschierter Feuerstahl aus Krefeld-Gellep
Creators: name: Pirling, Renate
Publisher: name: Verlag des Römisch-Germanischen Zentralmuseums Mainz
Year: 2017
Subjects: Frühmittelalter; Mitte 5. Jh.; Deutschland; Nordrhein-Westfalen; Krefeld-Gellep; Grabfunde; Eisen

description: [nicht vorhanden / not available]
description: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz, Bd. 7 (1960)
Ordering of two small parameters in the shallow water wave problem
Creators: name: Burde, Georgy I.
name: Sergyeyev, Artur
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Mathematical Physics (math-ph)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences
subject: 76M45

description: The classical problem of irrotational long waves on the surface of a shallow layer of an ideal fluid moving under the influence of gravity as well as surface tension is considered. A systematic procedure for deriving an equation for surface elevation for a prescribed relation between the orders of the two expansion parameters, the amplitude parameter $α$ and the long wavelength (or shallowness) parameter $β$, is developed. Unlike the heuristic approaches found in the literature, when modifications are made in the equation for surface elevation itself, the procedure starts from the consistently truncated asymptotic expansions for unidirectional waves, a counterpart of the Boussinesq system of equations for the surface elevation and the bottom velocity, from which the leading order and higher order equations for the surface elevation can be obtained by iterations. The relations between the orders of the two small parameters are taken in the form $β=O(α^n)$ and $α=O(β^m)$ with $n$ and $m$ specified to some important particular cases. The analysis shows, in particular, that some evolution equations, proposed before as model equations in other physical contexts (like the Gardner equation, the modified KdV equation, and the so-called 5th-order KdV equation), can emerge as the leading order equations in the asymptotic expansion for the unidirectional water waves, on equal footing with the KdV equation. The results related to the higher orders of approximation provide a set of consistent higher order model equations for unidirectional water waves which replace the KdV equation with higher-order corrections in the case of non-standard ordering when the parameters $α$ and $β$ are not of the same order of magnitude. (See the paper for the complete abstract.)
description: 17 pages, LaTeX, uses IOP style files, accepted for publication in J. Phys. A: Math. Theor. (see also the copyright notice in the paper)
Sachdev-Ye-Kitaev Models and Beyond: A Window into Non-Fermi Liquids
Creators: name: Chowdhury, Debanjan
name: Georges, Antoine
name: Parcollet, Olivier
name: Sachdev, Subir
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a review of the Sachdev-Ye-Kitaev (SYK) model of compressible quantum many-body systems without quasiparticle excitations, and its connections to various theoretical studies of non-Fermi liquids in condensed matter physics. The review is placed in the context of numerous experimental observations on correlated electron materials. Strong correlations in metals are often associated with their proximity to a Mott transition to an insulator created by the local Coulomb repulsion between the electrons. We explore the phase diagrams of a number of models of such local electronic correlation, employing a dynamical mean field theory in the presence of random spin exchange interactions. Numerical analyses and analytical solutions, using renormalization group methods and expansions in large spin degeneracy, lead to critical regions which display SYK physics. The models studied include the single-band Hubbard model, the $t$-$J$ model and the two-band Kondo-Heisenberg model in the presence of random spin exchange interactions. We also examine non-Fermi liquids obtained by considering each SYK model with random four-fermion interactions to be a multi-orbital atom, with the SYK-atoms arranged in an infinite lattice. We connect to theories of sharp Fermi surfaces without any low-energy quasiparticles in the absence of spatial disorder, obtained by coupling a Fermi liquid to a gapless boson; a systematic large $N$ theory of such a critical Fermi surface, with SYK characteristics, is obtained by averaging over an ensemble of theories with random boson-fermion couplings. Finally, we present an overview of the links between the SYK model and quantum gravity and end with an outlook on open questions.
description: 72 pages, 25 figures and lots of references. Comments are welcome; (v2) Added references
Novel O(H(N)+N/H(N)) Algorithmic Techniques for Several Types of Queries and Updates on Rooted Trees and Lists
Creators: name: Andreica, Mugurel Ionut
Publisher: name: arXiv
Year: 2013
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: In this paper we present novel algorithmic techniques with a O(H(N)+N/H(N)) time complexity for performing several types of queries and updates on general rooted trees, binary search trees and lists of size N. For rooted trees we introduce a new compressed super-node tree representation which can be used for efficiently addressing a wide range of applications. For binary search trees we discuss the idea of globally rebuilding the entire tree in a fully balanced manner whenever the height of the tree exceeds the value of a conveniently chosen function of the number of tree nodes. In the end of the paper we introduce the H-list data structure which supports concatenation, split and several types of queries. Note that when choosing H(N)=sqrt(N) we obtain O(H(N)+N/H(N))=O(sqrt(N)).
Fast-response silicon photonic microheater induced by parity-time symmetry breaking
Creators: name: Wei, Yanxian
name: Cheng, Junwei
name: Wang, Yilun
name: Zhou, Hailong
name: Dong, Jianji
name: Huang, Dongmei
name: Li, Feng
name: Li, Ming
name: Wai, P. K. A.
name: Zhang, Xinliang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Thermo-optic microheater is indispensable in silicon photonic devices for smart and reconfigurable photonic networks. Much efforts have been made to improve the metallic microheater performance in the past decades. However, because of the metallic nature of light absorption, placing the metallic microheater very close to the waveguide for fast response is impractical and has not been done experimentally. Here, we experimentally demonstrate a metallic microheater placed very close to the waveguide based on parity-time (PT) symmetry breaking. The intrinsic high loss of metallic heater ensures the system will operate in the PT-symmetry-broken region, which guarantee the low loss of light in the silicon waveguide. Moreover, heating at a close range significantly reduces the response time. A fast response time of ~1 us is achieved without introducing extra loss. The insertion loss is only 0.1 dB for the long heater. The modulation bandwidth is 280 kHz, which is an order of magnitude improvement when compared with that of the mainstream thermo-optic phase shifters. To verify the capability of large-scale integration, a 1*8 phased array for beam steering is also demonstrated experimentally with the PT-symmetry-broken metallic heaters. Our work provides a novel design concept for low-loss fast-response optical switches with dissipative materials and offers a new approach to enhance the performance of thermo-optic phase shifters.
Two-temperature Langevin dynamics in a parabolic potential
Creators: name: Dotsenko, Victor
name: Maciolek, Anna
name: Vasilyev, Oleg
name: Oshanin, Gleb
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study a planar two-temperature diffusion of a Brownian particle in a parabolic potential. The diffusion process is defined in terms of two Langevin equations with two different effective temperatures in the X and the Y directions. In the stationary regime the system is described by a non-trivial particle position distribution P(x,y), which we determine explicitly. We show that this distribution corresponds to a non-equilibrium stationary state, characterised by the presence of space-dependent particle currents which exhibit a non-zero rotor. Theoretical results are confirmed by the numerical simulations.
description: 9 pages, 2 figures
EVReflex: Dense Time-to-Impact Prediction for Event-based Obstacle Avoidance
Creators: name: Walters, Celyn
name: Hadfield, Simon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: The broad scope of obstacle avoidance has led to many kinds of computer vision-based approaches. Despite its popularity, it is not a solved problem. Traditional computer vision techniques using cameras and depth sensors often focus on static scenes, or rely on priors about the obstacles. Recent developments in bio-inspired sensors present event cameras as a compelling choice for dynamic scenes. Although these sensors have many advantages over their frame-based counterparts, such as high dynamic range and temporal resolution, event-based perception has largely remained in 2D. This often leads to solutions reliant on heuristics and specific to a particular task. We show that the fusion of events and depth overcomes the failure cases of each individual modality when performing obstacle avoidance. Our proposed approach unifies event camera and lidar streams to estimate metric time-to-impact without prior knowledge of the scene geometry or obstacles. In addition, we release an extensive event-based dataset with six visual streams spanning over 700 scanned scenes.
description: To be published in IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) 2021
Fast recognition of alternating groups of unknown degree
Creators: name: Jambor, Sebastian
name: Leuner, Martin
name: Niemeyer, Alice C.
name: Plesken, Wilhelm
Publisher: name: arXiv
Year: 2013
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20P05, 20B30, 20B40 (Primary) 68Q25, 20-04 (Secondary)

description: We present a constructive recognition algorithm to decide whether a given black-box group is isomorphic to an alternating or a symmetric group without prior knowledge of the degree. This eliminates the major gap in known algorithms, as they require the degree as additional input. Our methods are probabilistic and rely on results about proportions of elements with certain properties in alternating and symmetric groups. These results are of independent interest; for instance, we establish a lower bound for the proportion of involutions with small support.
description: 31 pages, submitted to Journal of Algebra
Offline trumps online: Name recognition effects in the Five Star Movement 2012 Primary Election
Creators: name: Miotto, Maria Lucia
name: Marolla, Francesco
name: Cassani, Giovanni
Publisher: name: Zenodo
Year: 2023
Subjects: online elections
online community
five star movement

description: We study the impact of (i) online engagement on the MeetUp platform and (ii) previous candidacies in local elections on the electoral prospects of the candidates in the 2012 online primaries of the Five Star Movement (FSM).
While previous research has produced mixed findings regarding the influence of extensive digital media use on intra-party democracy, our study addresses a critical research gap by examining how digital tools and previous candidacies shape the distribution of power within a political party.
Using data from the FSM's MeetUp galaxy, we derive the online network of party members and explore the relationship between their network centrality (taken to quantify higher levels of online engagement) and their result in the primary election. We hypothesise that higher network centrality correlates with better electoral performances, especially considering the emphasis the FSM put on grass-root online activism. We further control for the documented influence exerted on the voting process by the voting interface, with strong ballot order effects. We also look at whether candidates who ran in previous local elections (but lost) were advantaged due to name recognition.
Our results show that online activity had no correlation with electoral outcomes, with no differences between candidates who were or were not on MeetUp. Network centrality was also uncorrelated with the election outcome. On the contrary, the few candidates who ran for local office received a consistent advantage, which remains significant after controlling for the influence of the voting interface.
While we considered a single platform to quantify online activity and plan to extend our study to other arenas were the party's political discourse was articulated, our results suggest that online efforts were not rewarded, whereas party endorsements in the form of candidacies in local elections did play a part in orienting the vote.
The Willmore energy and the magnitude of Euclidean domains
Creators: name: Gimperlein, Heiko
name: Goffeng, Magnus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Metric Geometry (math.MG)
subject: Analysis of PDEs (math.AP)
subject: Classical Analysis and ODEs (math.CA)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We study the geometric significance of Leinster's notion of magnitude for a compact metric space. For a smooth, compact domain in an odd-dimensional Euclidean space, we show that the asymptotic expansion of the magnitude function at infinity determines the Willmore energy of the boundary. This disproves the Leinster-Willerton conjecture for a compact convex body in all odd dimensions.
description: 10 pages, to appear in Proceedings of the AMS
The C-flame Quenching by Convective Boundary Mixing in Super-AGB Stars and the Formation of Hybrid C/O/Ne White Dwarfs and SN Progenitors
Creators: name: Denissenkov, Pavel A.
name: Herwig, Falk
name: Truran, James W.
name: Paxton, Bill
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: After off-center C ignition in the cores of super-AGB stars the C flame propagates all the way down to the center, trailing behind it the C-shell convective zone, and thus building a degenerate ONe core. This standard picture is obtained in stellar evolution simulations if the bottom C-shell convection boundary is assumed to be a discontinuity associated with a strict interpretation of the Schwarzschild condition for convective instability. However, this boundary is prone to additional mixing processes, such as thermohaline convection and convective boundary mixing. Using hydrodynamic simulations we show that, contrary to previous results, thermohaline mixing is too inefficient to interfere with the C-flame propagation. However, even a small amount of convective boundary mixing removes the physical conditions required for the C-flame propagation all the way to the center. This result holds even if we allow for some turbulent heat transport in the CBM region. As a result, super AGB stars build in their interiors hybrid C-O-Ne degenerate cores composed of a relatively large CO core (M_CO ~ 0.2 M_sun) surrounded by a thick ONe zone (M_ONe ~ 0.85 M_sun) with another thin CO layer above. If exposed by mass loss, these cores will become hybrid C-O-Ne white dwarfs. Otherwise, the ignition of C-rich material in the central core, surrounded by the thick ONe zone, may trigger a thermonuclear supernova explosion. The quenching of the C-flame may have implications for the ignition mechanism of SN Ia in the double-degenerate merger scenario.
description: 26 pages, 10 figures, accepted by ApJ
Discriminating different models of luminosity-redshift distribution
Creators: name: Cosmai, L.
name: Fanizza, G.
name: Gasperini, M.
name: Tedesco, L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The beginning of the cosmological phase bearing the direct kinematic imprints of supernovae dimming may significantly vary within different models of late-time cosmology, even if such models are able to fit present SNe data at a comparable level of statistical accuracy. This effect -- useful in principle to discriminate among different physical interpretations of the luminosity-redshift relation -- is illustrated here with a pedagogical example based on the LTB geometry.
description: 11 pages, 6 figures. To appear in Class. Quantum Grav
Factors Influencing Consumer Satisfaction and Use Intention of B2C E-Commerce Platforms on Chengdu, China
Creators: name: Xiaomei Pu
Publisher: name: Assumption University
Year: 2023
Subjects: Perceived Ease of Use
Perceived Usefulness
Intention to Use
Satisfaction
E-Commerce

description: AU-GSB e-Journal, 16, 1, 150-159
Getting Ready for Business Expansion: To Enhance Employee Motivation and Work Performance Through HR Management Practices, Emotional Intelligence and Initiating Organization Learning Culture: A Study of a Fintech Company in Myanmar
Creators: name: Htet Yie Win
Publisher: name: Assumption University
Year: 2023
Subjects: HRM Practices
Emotinal Intelligence
Organization Learning Culture
Employee Motivation
Work Performance

description: AU-GSB e-Journal, 16, 1, 160-171
A characterization of rationality for operators in free semicircular elements
Creators: name: Miyagawa, Akihiro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: Realizing free semicircular elements on the full Fock space, we prove an equivalence between rationality of operators obtained from them and finiteness of the rank of their commutators with right annihilation operators. This is an analogue of the result for the reduced $C^*$-algebra of the free group by G. Duchamp and C. Reutenauer which was extended by PA. Linnel to densely defined unbounded operators affiliated with the free group factor. Although their result was motivated from quantized calculus in noncommutative geometry, we state our results in terms of free probability theory.
description: 20 pages. This version includes minor modifications and will appear to Journal of Functional Analysis