cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Geometric phase effects in dynamics near conical intersections: Symmetry breaking and spatial localization
Creators: name: Ryabinkin, Ilya G.
name: Izmaylov, Artur F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that finite systems with conical intersections can exhibit spontaneous symmetry breaking which manifests itself in spatial localization of eigenstates. This localization has a geometric phase origin and is robust against variation of model parameters. The transition between localized and delocalized eigenstate regimes resembles a continuous phase transition. The localization slows down the low-energy quantum nuclear dynamics at zero and low temperatures.
description: 5 pages, 5 figures
Looking for empty topological wormhole spacetimes in $F(R)$-modified gravity
Creators: name: Di Criscienzo, R.
name: Myrzakulov, R.
name: Sebastiani, L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Much attention has been recently devoted to modified theories of gravity in the attempt to efficiently describe both early inflation and late-time acceleration of our universe without referring to the cosmological constant or other ad hoc kinds of fluids. The simplest models overcome General Relativity simply by replacing $R$ with $F(R)$ in the Einstein--Hilbert action. Unfortunately, such models typically lack most of the beautiful solutions discovered in Einstein's gravity. Nonetheless, in $F(R)$ gravity, it has been possible to get at least few black holes, but still we do not know any empty wormhole-like spacetime solution. The present paper aims to explain why it is so hard to get such solutions (given that they exist). Few solutions are derived in the simplest cases while only an implicit form has been obtained in the non-trivial case.
description: 13 pages, published version
Visual-semantic embedding networks for cross-modal learning and information retrieval with search engine integration
Creators: name: Gong, Yan
Publisher: name: Loughborough University
Year: 2023
Subjects: classificationCode: 469999
subject: Other information and computing sciences not elsewhere classified

description: With the expansion of multimedia, cross-modal information retrieval has become increasingly critical, facilitating integrated retrieval across text, images, and videos. Visual-Semantic Embedding (VSE) networks represent state-of-the-art algorithms for cross-modal learning and information retrieval, aiming to extract the semantics of vision and language and then embed them into a shared latent space. This thesis focuses on image-to-text and text-to-image retrieval using VSE networks, and its motivations with associated contributions are outlined as follows.1) In training VSE networks, the commonly used hard negatives loss function results in a low learning speed due to its fixed learning objective. This thesis proposes a novel Semantically-Enhanced Hard negatives Loss function (LSEH) that dynamically determines the learning objective based on the optimal similarity scores between irrelevant image–description pairs, improving both the learning speed and performance of cross-modal information retrieval for VSE networks. 2) For state-of-the-art VSE network architectures, they rely on Vision Transformer (ViT) for pre-training but are limited in their ability to focus on image region relations, as their primary focus is on globally matching images with relevant descriptions. This thesis introduces a novel network of VIsion Transformers with Relation-focus (VITR) trained with LSEH, enhancing ViT by incorporating a local encoder for regional relation reasoning. The results of relational reasoning are fused with pre-trained global knowledge using a novel fusion module, improving cross-modal information retrieval with a focus on relations. 3) Within the applications of VSE networks, the full potential of integrating them into search engines has yet to be fully explored. This thesis presents Boon, a cross-modal search engine integrating VITR to enhance user experience through relation-focused image-text retrieval and multilingual conversations with Generative Pre-trained Transformer (GPT)-3.5. Boon showcases its capabilities using the RefCOCOg real-world image dataset and the ArtUK painting image dataset. Additionally, Boon enables web multimedia search through integration with Google’s API.Future work will explore VSE networks on unsupervised learning, text-video retrieval, and employing Large Language Model (LLM)s for efficient text embedding; additionally, it will focus on integrating image-to-image retrieval within cross-modal search engines.
Multiobjective Firefly Algorithm for Continuous Optimization
Creators: name: Yang, Xin-She
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Design problems in industrial engineering often involve a large number of design variables with multiple objectives, under complex nonlinear constraints. The algorithms for multiobjective problems can be significantly different from the methods for single objective optimization. To find the Pareto front and non-dominated set for a nonlinear multiobjective optimization problem may require significant computing effort, even for seemingly simple problems. Metaheuristic algorithms start to show their advantages in dealing with multiobjective optimization. In this paper, we extend the recently developed firefly algorithm to solve multiobjective optimization problems. We validate the proposed approach using a selected subset of test functions and then apply it to solve design optimization benchmarks. We will discuss our results and provide topics for further research.
description: 10 pages, 9 figures. arXiv admin note: text overlap with arXiv:1203.6571
Microwave control of atomic motional states in a spin-dependent optical lattice
Creators: name: Belmechri, Noomen
name: Förster, Leonid
name: Alt, Wolfgang
name: Widera, Artur
name: Meschede, Dieter
name: Alberti, Andrea
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Spin-dependent optical potentials allow us to use microwave radiation to manipulate the motional state of trapped neutral atoms (Förster et al. 2009 Phys. Rev. Lett. 103, 233001). Here, we discuss this method in greater detail, comparing it to the widely-employed Raman sideband coupling method. We provide a simplified model for sideband cooling in a spin-dependent potential, and we discuss it in terms of the generalized Lamb-Dicke parameter. Using a master equation formalism, we present a quantitative analysis of the cooling performance for our experiment, which can be generalized to other experimental settings. We additionally use microwave sideband transitions to engineer motional Fock states and coherent states, and we devise a technique for measuring the population distribution of the prepared states.
description: 22 pages, 11 figures
title:  Consumi e stili di vita al tempo del Covid. Impatti sulle comunità
Creators: name: Manfreda, Ada
Publisher: name: RomaTrE-Press
Year: 2021

description: La pandemia Covid-19 ha comportato conseguenze e trasformazioni prefigurando scenari inediti sul piano economico, sociale e personale, determinando anche nel campo della ricerca l’urgenza di esplorarne le ricadute. Il volume dà quindi conto delle indagini svolte e in corso, sin dai primi giorni del lockdown, dai docenti e dai collaboratori del Dipartimento di Scienze della Formazione dell’Università Roma Tre, toccando i temi più diversi: dalla didattica a distanza, all’università e nei diversi ordini di scuola, al futuro dei servizi di orientamento, dal lavoro socio-educativo nelle varie tipologie di servizi all’impatto della pandemia sulle comunità, dalle narrazioni ai linguaggi artistici a contrasto di quest’emergenza non solo sanitaria. Si sono così esplorate le diverse educazioni possibili, riassegnando centralità ai processi formativi e al benessere delle persone, provando a tratteggiare nuovi paradigmi e prospettive.
description: La pandemia da Sars-Covid2 ha generato un fenomeno estremamente complesso e multifattoriale che pone problemi di ordine biologico, sanitario, economico, politico, socio-culturale ed educativo. A livello comunitario esso impatta su: relazioni familiari e sociali, pratiche d’uso degli ambienti domestici e degli spazi urbani e pubblici, organizzazione dei tempi e degli spazi di vita e di lavoro, opinioni e rappresentazioni simbolico-culturali attorno a temi come salute, sicurezza, democrazia e libertà. Quanto e come le comunità riescono ad assorbire l’onda d’urto generata dalle strategie che sono state messe in campo per affrontare la pandemia (quarantena e distanziamento sociale)? Ovvero le strategie attuate, mettendo sotto stress il delicato confronto/conflitto tra comune ed immune, agiscono dentro una cornice di sostenibilità, verso nuove e virtuose forme di benessere ed empowerment comunitario, ovvero minacciano in radice le dinamiche di funzionamento di una comunità? Il lavoro presenta un’analisi di scenario condotta sugli stili di vita degli italiani, con particolare riferimento a una dimensione di indagine: il CONSUMO.
description: La Ricerca dipartimentale ai tempi del COVID-19
Neutrino Mixing and Discrete Symmetries
Creators: name: Hu, Bo
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we discuss a new way to derive neutrino mixing patterns, which originates from the idea proposed in a recent article by Hernandez and Smirnov. Its applications to various cases are discussed. We first present the complete set of possible mixing patterns for the minimal case where unbroken residual symmetries of the Majorana neutrino and left-handed charged-lepton mass matrices obey some general assumptions that are also satisfied by many models based on discrete symmetries. We find that they are either well-known mixing patterns or phenomenologically disfavored ones. It shows clearly that, for full-mixing matrices to fit the mixing data with small or negligible corrections, it is necessary to go beyond the minimal scenario. We present an explicit formalism for a rather general nonminimal case. Some applications and phenomenological implications are discussed. Several new mixing patterns are derived.
description: v3: Minor changes, published version
Carnivora Bowdich 1821
Creators: name: W. Christopher Wozencraft
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Carnivora

description: ORDER CARNIVORA COMMENTS: Recent studies on family level relationships have agreed in several key areas, among which are: (1) The sister group to the Carnivora is the +Creodonta. (2) The Recent Carnivora are organized into two monophyletic groups; Suborder Feliformia: felids, herpestids, hyaenids and viverrids; and Suborder Caniformia: canids, ursids, mustelids, odobenids, otariids, phocids, and procyonids. (3) The pinnipeds (otariids, odobenids, and phocids) are included within the suborder Caniformia; placing them in a separate Order would make the Carnivora paraphyletic (Flynn et al., 1988; Tedford, 1976; Wozencraft, 1989a; Berta, 1991).
description: Published as part of W. Christopher Wozencraft, 1993, Order Carnivora, pp. 279-348 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 279, DOI: 10.5281/zenodo.7359191
description: {"references": ["Flynn, L. J., N. A. Neff, and R. H. Tedford. 1988. Phylogeny of the Carnivora, Pp. 73 - 115, in The phylogeny and classification of the tetrapods (M. J. Benton, ed.). Clarendon Press, Oxford, 2 (Mammals): 1 - 329.", "Tedford, R. H. 1976. Relationship of pinnipeds to other carnivores (Mammalia). Systematic Zoology, 25: 363 - 374.", "Wozencraft, W. C. 1989 a. The phylogeny of the Recent Carnivora. Pp. 495 - 535, in Carnivore behavior, ecology, and evolution (J. L. Gittleman, ed.). Cornell University Press, Ithaca, NY, 620 pp.", "Berta, A. 1991. New Enaliarctos (Pinnipedimorpha) from the Oligocene and Miocene of Oregon and the role of \" Enaliarctids \" in pinniped phylogeny. Smithsonian Contributions to Paleobiology, 69: 1 - 33."]}
Toolkit briefing (Estonian/Eesti)
Creators: name: ySKILLS
Publisher: name: KU Leuven: ySKILLS
Year: 2023

description: Projekti ySKILLS uurimisrühm on välja töötanud kasuliku õppevahendi, mis aitab õpilastel omandada teadmisi noorte digioskuste kohta. Õppevahend sisaldab teabematerjali, küsimusi ja harjutusi ning on sündinud projekti ySKILLS uurimistöö tulemusel. Projekti kohta saab täpsemalt lugeda aadressil www.yskills.eu.
Käesoleva juhendi eesmärk on anda ülevaade õppevahendi sisust ja kasutusvõimalustest.
Marine Habitat Protection Indexes to understand the local and global conservation of marine habitats - Poster Presentation
Creators: name: Kumagai, Joy A.
name: Favoretto, Fabio
Publisher: name: Zenodo
Year: 2021
Subjects: indicator
marine habitat
coastal habitat
conservation

description: A short video presentation and poster prepared for the Ecological Society of America Conference 2021 based on recent manuscript submitted for publication that proposes two new indexes for tracking progress toward area based targets for marine and coastal habitat conservation. Presentation name: Marine Habitat Protection Indexes to understand the local and global conservation of marine habitats Conference: 2021 Ecological Society of America Conference Session: Conservation Planning, Policy, And Theory session on Thursday, August 5th 2021.
description: This poster was based on a manuscript currently available as a preprint on BioRxiv here: https://doi.org/10.1101/2021.06.09.447318
Pair production of a 125 GeV Higgs boson in MSSM and NMSSM at the ILC
Creators: name: Heng, Zhaoxia
name: Shang, Liangliang
name: Wan, Peihua
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this work we investigate the Higgs pair production in the MSSM and NMSSM at the photon-photon collision of the ILC. We consider various experimental constraints and scan over the parameter space of the MSSM and NMSSM. Then we calculate the cross section of Higgs pair production in the allowed parameter space and compare the results with the predictions in the SM. We find that the large enhancement of the cross section in the MSSM is mainly due to the contributions from the loops mediated by the stau, while in the NMSSM it is mainly due to the contributions from the top-squark loops. For light $m_{\tildeτ_1}$ and large $μ\tanβ$, the production rate can be enhanced by a factor of 18 in the MSSM (relative to the SM prediction). And for a large trilinear soft breaking parameter $A_t$ and a moderately light top-squark, it can also be enhanced by a factor of 2 in the NMSSM. Moreover, we also calculate the $χ^2$ values with the LHC Higgs data and display the results for the parameter space with $χ^2$ better than the SM value.
description: 14 pages, 6 figures
Broad iron line in the fast spinning neutron-star system 4U 1636-53
Creators: name: Sanna, Andrea
name: Hiemstra, Beike
name: Mendez, Mariano
name: Altamirano, Diego
name: Belloni, Tomaso
name: Linares, Manuel
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We analysed the X-ray spectra of six observations, simultaneously taken with XMM-Newton and Rossi X-ray Timing Explorer (RXTE), of the neutron star low-mass X-ray binary 4U 1636-53. The observations cover several states of the source, and therefore a large range of inferred mass accretion rate. These six observations show a broad emission line in the spectrum at around 6.5 keV, likely due to iron. We fitted this line with a set of phenomenological models of a relativistically broadened line, plus a model that accounts for relativistically smeared and ionised reflection from the accretion disc. The latter model includes the incident emission from both the neutron-star surface or boundary layer and the corona that is responsible for the high-energy emission in these systems. From the fits with the reflection model we found that in four out of the six observations the main contribution to the reflected spectrum comes from the neutron-star surface or boundary layer, whereas in the other two observations the main contribution to the reflected spectrum comes from the corona. We found that the relative contribution of these two components is not correlated to the state of the source. From the phenomenological models we found that the iron line profile is better described by a symmetric, albeit broad, profile. The width of the line cannot be explained only by Compton broadening, and we therefore explored the case of relativistic broadening. We further found that the direct emission from the disc, boundary layer, and corona generally evolved in a manner consistent with the standard accretion disc model, with the disc and boundary layer becoming hotter and the disc moving inwards as the source changed from the hard in to the soft state. The iron line, however, did not appear to follow the same trend.
description: 20 pages, 8 figures, Accepted for publication in MNRAS
A Homogeneous Ensemble of Artificial Neural Networks for Time Series Forecasting
Creators: name: Adhikari, Ratnadip
name: Agrawal, R. K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: 68T05

description: Enhancing the robustness and accuracy of time series forecasting models is an active area of research. Recently, Artificial Neural Networks (ANNs) have found extensive applications in many practical forecasting problems. However, the standard backpropagation ANN training algorithm has some critical issues, e.g. it has a slow convergence rate and often converges to a local minimum, the complex pattern of error surfaces, lack of proper training parameters selection methods, etc. To overcome these drawbacks, various improved training methods have been developed in literature; but, still none of them can be guaranteed as the best for all problems. In this paper, we propose a novel weighted ensemble scheme which intelligently combines multiple training algorithms to increase the ANN forecast accuracies. The weight for each training algorithm is determined from the performance of the corresponding ANN model on the validation dataset. Experimental results on four important time series depicts that our proposed technique reduces the mentioned shortcomings of individual ANN training algorithms to a great extent. Also it achieves significantly better forecast accuracies than two other popular statistical models.
description: 8 pages, 4 figures, 2 tables, 26 references, international journal
Mathematical Modelling Of Heat Transfer Processes With Particular Application To Lighting Fittings
Creators: name: Wright, George
Publisher: name: London South Bank University
Year: 1986

description: In this thesis the heat transfer processes which are present in a lighting fitting are described and modelled. The coupling of these processes is also studied. All (of the models have been made as general as possible and could be applied to other heat transfer situations, ranging from solar collectors to production of semiconductor crystals, with little amendment. The main interest in the work is in two areas: firstly, in the solution of the coupled nonlinear partial differential equations which describe natural convection and secondly in the study of the coupling of radiation and convection in the lighting fitting, together with external heat transfer effects. The governing equations for natural convection were solved using a finite element method and various results were obtained in this area. The coupled problem was described by two models =: one involving a simple model of the internal convection and the other using a finite element model of this mechanism. The solution of coupled radiation and convection using finite elements has not been done before, although there has been some simultaneous work in this area. The inclusion of external heat transfer effects in the study of coupled radiation and convection in a cavity is also a new field: the only previous work on this subject used finite difference methods and was concerned with rectangular cavities ; here finite element methods are used and the geometry is axisymmetric. The coupled models were applied to the lighting fitting and temperatures at the shade of the fitting were predicted ; these predictions were compared with experiment and reasonable agreement was found. The models described here represent an improvement over previous work on prediction of temperatures in fittings; this improvement is due to the fact that the natural convection was modelled in a more detailed way than previously.
The triangle wave versus the cosine: How classical systems can optimally approximate EPR-B correlations
Creators: name: Gill, Richard D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: 81P45

description: The famous singlet correlations of a composite quantum system consisting of two spatially separated components exhibit notable features of two kinds. The first kind consists of striking certainty relations: perfect correlation and perfect anti-correlation in certain settings. The second kind consists of a number of symmetries, in particular, invariance under rotation, as well as invariance under exchange of components, parity, or chirality. In this note, I investigate the class of correlation functions that can be generated by classical composite physical systems when we restrict attention to systems which reproduce the certainty relations exactly, and for which the rotational invariance of the correlation function is the manifestation of rotational invariance of the underlying classical physics. I call such correlation functions classical EPR-B correlations. It turns out that the other three (binary) symmetries can then be obtained "for free": they are exhibited by the correlation function, and can be imposed on the underlying physics by adding an underlying randomisation level. We end up with a simple probabilistic description of all possible classical EPR-B correlations in terms of a "spinning coloured disk" model, and a research programme: describe these functions in a concise analytic way. We survey open problems, and we show that the widespread idea that "quantum correlations are more extreme than classical physics allows" is at best highly inaccurate, through giving a concrete example of a classical correlation which satisfies all the symmetries and all the certainty relations and which exceeds the quantum correlations over a whole range of settings
description: This version, arXiv:1312.6403v.6, as accepted by "Entropy" 27 February 2020
title:  Lavoro socioeducativo e precarietà ai tempi del Covid-19. Prime note e osservazioni di ricerca
Creators: name: Di Sandro, Mirco
name: Carbone, Vincenzo
Publisher: name: RomaTrE-Press
Year: 2021

description: La pandemia Covid-19 ha comportato conseguenze e trasformazioni prefigurando scenari inediti sul piano economico, sociale e personale, determinando anche nel campo della ricerca l’urgenza di esplorarne le ricadute. Il volume dà quindi conto delle indagini svolte e in corso, sin dai primi giorni del lockdown, dai docenti e dai collaboratori del Dipartimento di Scienze della Formazione dell’Università Roma Tre, toccando i temi più diversi: dalla didattica a distanza, all’università e nei diversi ordini di scuola, al futuro dei servizi di orientamento, dal lavoro socio-educativo nelle varie tipologie di servizi all’impatto della pandemia sulle comunità, dalle narrazioni ai linguaggi artistici a contrasto di quest’emergenza non solo sanitaria. Si sono così esplorate le diverse educazioni possibili, riassegnando centralità ai processi formativi e al benessere delle persone, provando a tratteggiare nuovi paradigmi e prospettive.
description: “Lavoro socio-educativo e precarietà ai tempi del Covid-19” è il titolo dell’inchiesta lanciata all’indomani del lockdown, configurata come una ricerca-intervento che si colloca all’interno di un dibattito pubblico, particolarmente vivace in quei giorni in Italia, imperniato sulla rilevanza dei temi della riproduzione e della cura. L’inchiesta mira a cogliere le specificità e gli aspetti problematici della gestione dei servizi alla
description: La Ricerca dipartimentale ai tempi del COVID-19
Possible experimental realization of a basic Z2 topological semimetal in GaGeTe
Creators: name: Haubold, E.
name: Fedorov, A.
name: Pielnhofer, F.
name: Rusinov, I. P.
name: Menshchikova, T. V.
name: Duppel, V.
name: Friedrich, Daniel
name: Weihrich, Richard
name: Pfitzner, Arno
name: Zeugner, A.
name: Isaeva, A.
name: Thirupathaiah, S.
name: Kushnirenko, Y.
name: Rienks, E.
name: Kim, T.
name: Chulkov, E. V.
name: Büchner, B.
name: Borisenko, S.
Publisher: name: Universität Regensburg
Year: 2019
Subjects: subject: 540 Chemie

description: We report experimental and theoretical evidence that GaGeTe is a basic Z2 topological semimetal with three types of charge carriers: bulk-originated electrons and holes as well as surface state electrons. This electronic situation is qualitatively similar to the classic 3D topological insulator Bi2Se3, but important differences account for an unprecedented transport scenario in GaGeTe. High-resolution angle-resolved photoemission spectroscopy combined with advanced band structure calculations show a small indirect energy gap caused by a peculiar band inversion at the T-point of the Brillouin zone in GaGeTe. An energy overlap of the valence and conduction bands brings both electron and holelike carriers to the Fermi level, while the momentum gap between the corresponding dispersions remains finite. We argue that peculiarities of the electronic spectrum of GaGeTe have a fundamental importance for the physics of topological matter and may boost the material’s application potential.
Weak decay constant of neutral pions in a hot and magnetized quark matter
Creators: name: Fayazbakhsh, Sh.
name: Sadooghi, N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The directional weak decay constants of neutral pions are determined at finite temperature T, chemical potential μand in the presence of a constant magnetic field B. To do this, we first derive the energy dispersion relation of neutral pions from the corresponding effective action of a two-flavor, hot and magnetized Nambu--Jona-Lasinio model. Using this dispersion relation, including nontrivial directional refraction indices, we then generalize the PCAC relation of neutral pions and derive the Goldberger-Treiman (GT) as well as the Gell--Mann-Oakes-Renner (GOR) relations consisting of directional quark-pion coupling constant g_{qqπ^{0}}^{(μ)} and weak decay constant f_{π^{0}}^{(μ)} of neutral pions. The temperature dependence of g_{qqπ^{0}}^{(μ)} and f_{π^{0}}^{(μ)}, are then determined for fixed chemical potential and various constant background magnetic fields. The GT and GOR relations are also verified at finite T,μand eB. It is shown that, because of the explicit breaking of the Lorentz invariance by the magnetic field, the directional quark-pion coupling and decay constants of neutral pions in the longitudinal and transverse directions with respect to the direction of the external magnetic field are different, i.e. g_{qqπ^{0}}^{\|}\neq g_{qqπ^{0}}^{\perp} and f_{π^{0}}^{\|}\neq f_{π^{0}}^{\perp}. As it turns out, for fixed T,μand B, g_{qqπ^{0}}^{\|}> g_{qqπ^{0}}^{\perp} and f_{π^{0}}^{\|}< f_{π^{0}}^{\perp}.
description: V1: 25 pages, 15 figures; V2: 27 pages, 15 figures, 1 table. Discussions improved, references updated. Version accepted for publication in PRD
The PSR J1124-5916 wind nebula in the near-infrared
Creators: name: Zharikov, Sergey V.
name: Zyuzin, Dmitry A.
name: Shibanov, Yuri A.
name: Mennickent, Ronald E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The young radio pulsar J1124-5916 is associated with a Cas A like supernova remnant G292.0+1.8. It powers a compact torus-like pulsar wind nebula with a jet first detected in X-rays and then identified in the optical and mid-infrared. We carried out deep near-infrared observations of the pulsar field to identify the pulsar and its nebula in this range. The direct imaging mode of the NACO adaptive optics instrument at the ESO VLT in the H and Ks bands was used. In both bands we detected a faint, H=21.30(10) and Ks=20.45(10), extended elliptical object, whose center position is consistent with the X-ray position of the pulsar. The morphology of the object and the orientation of its major axis are in a good agreement with those observed for the pulsar torus-like nebula in the mid-infrared, optical, and X-rays. This suggests that it is the near-infrared counterpart of the nebula. The measured fluxes compiled with the data in other ranges show a complicated unabsorbed power law spectrum of the torus-like nebula with several steep breaks between the near-infrared and mid-infrared, the optical and X-rays, and possibly in the mid-infrared. This implies a multiple relativistic particle population responsible for the synchrotron emission of the nebula in different spectral ranges. We have not resolved the pulsar counterpart from its nebula and place only upper limits on its brightness, H >= 23.9$ and Ks >= 22.7. Based on that, its contribution to the total near-infrared flux of the pulsar+nebula system is <= 10%, which is comparable with the expected contribution in the optical.
description: 7 pages, 6 figures, 3 tables, Accepted for publication in A&A
A physical approach to the classification of indecomposable Virasoro representations from the blob algebra
Creators: name: Gainutdinov, Azat M.
name: Jacobsen, Jesper Lykke
name: Saleur, Hubert
name: Vasseur, Romain
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In the context of Conformal Field Theory (CFT), many results can be obtained from the representation theory of the Virasoro algebra. While the interest in Logarithmic CFTs has been growing recently, the Virasoro representations corresponding to these quantum field theories remain dauntingly complicated, thus hindering our understanding of various critical phenomena. We extend in this paper the construction of Read and Saleur (2007), and uncover a deep relationship between the Virasoro algebra and a finite-dimensional algebra characterizing the properties of two-dimensional statistical models, the so-called blob algebra (a proper extension of the Temperley--Lieb algebra). This allows us to explore vast classes of Virasoro representations (projective, tilting, generalized staggered modules, etc.), and to conjecture a classification of all possible indecomposable Virasoro modules (with, in particular, L_0 Jordan cells of arbitrary rank) that may appear in a consistent physical Logarithmic CFT where Virasoro is the maximal local chiral algebra. As by-products, we solve and analyze algebraically quantum-group symmetric XXZ spin chains and sl(2|1) supersymmetric spin chains with extra spins at the boundary, together with the "mirror" spin chain introduced by Martin and Woodcock (2004).
description: 65 pages, 19 figures. New appendix
Unveiling the emission properties of three long-period pulsars using FAST
Creators: name: Tedila, H. M.
name: Li, D.
name: Wang, P.
name: Yuen, R.
name: Yuan, J. P.
name: Wang, N.
name: Wen, Z. G.
name: Dang, S. J.
name: Tegegne, A. G.
name: Rejep, R.
name: Miao, C. C.
name: Collaboration, FAST
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We detail the emission behaviors of three long-period pulsars detected using the Five-hundred-meter Aperture Spherical radio Telescope (FAST) during the CRAFTS survey. Their rotational periods range from 1.83 s to 4.75 s, and the null fractions measure between 28% and 53%. PSR J1945+1211 and PSR J2323+1214 exhibited quasi-periodic nulls, with duration of around 57 seconds. The longest null was observed in PSR J1945+1211, lasting 76 seconds. PSR J2323+1214 displayed varying null fractions between its leading and trailing components. For the first time in PSR J2323+1214, we detected five dwarf pulses, which are much weaker and narrower pulses than typical burst pulses. In addition, we investigate the microstructure of PSR J1900-0134 for the first time, revealing intricate pulses of up to 2.05 milliseconds and noting its complex emission characteristics. Bright pulses occur in all of these sources at different rates. These observations suggest complex magnetospheric processes, potentially related to magnetic reconnections, and provide insights into the origins of bright and microstructure pulses, as well as their distinctions from ordinary pulses.
description: 36 pages, 23 figures
Metastable D-term Dynamical SUSY Breaking
Creators: name: Maru, Nobuhito
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present the mechanism of the dynamical supersymmetry (SUSY) breaking at the metastable vacuum in the N=1 U(N) SUSY gauge theory with adjoint superfields. The dynamical SUSY breaking is triggered by the non-vanishing D-term coupled to the observable sector, and is realized by the self-consistent Hartree-Fock approximation of the NJL type while it eventually brings us the non-vanishing F-term as well. We numerically check the local stability of our metastable vacuum.
description: 7 pages, 2 figures, contribution to SCGT12 "KMI-GCOE Workshop on Strong Coupling Gauge Theories in the LHC Perspective", 4-7 Dec. 2012, Nagoya University
title:  L’enkyklios paideia si arricchisce della pandemia tra cultura e scienza della pedagogia
Creators: name: Chistolini, Sandra
Publisher: name: RomaTrE-Press
Year: 2021

description: La pandemia Covid-19 ha comportato conseguenze e trasformazioni prefigurando scenari inediti sul piano economico, sociale e personale, determinando anche nel campo della ricerca l’urgenza di esplorarne le ricadute. Il volume dà quindi conto delle indagini svolte e in corso, sin dai primi giorni del lockdown, dai docenti e dai collaboratori del Dipartimento di Scienze della Formazione dell’Università Roma Tre, toccando i temi più diversi: dalla didattica a distanza, all’università e nei diversi ordini di scuola, al futuro dei servizi di orientamento, dal lavoro socio-educativo nelle varie tipologie di servizi all’impatto della pandemia sulle comunità, dalle narrazioni ai linguaggi artistici a contrasto di quest’emergenza non solo sanitaria. Si sono così esplorate le diverse educazioni possibili, riassegnando centralità ai processi formativi e al benessere delle persone, provando a tratteggiare nuovi paradigmi e prospettive.
description: La pedagogia generale e sociale è stata completamente rivisitata durante l’emergenza epidemiologica da COVID-19, sia dal punto di vista epistemologico che dal punto di vista metodologico. È ancora in pieno svolgimento l’aggiornamento della formulazione del lessico pedagogico e delle scienze dell’educazione con riferimento a concetti e significati intesi a rispondere al progetto fondamentale di formazione completa e integrale della persona umana. Il divenire dell’educazione viene sensibilmente riorientano nell’era della pandemia, tra postmodernità e globalizzazione. Il contributo della scienza medica è tale da fornire parole che si associano ai processi educativi, ancora da decifrare. Nella lettura interpretativa dell’educazione i neologismi rappresentano momenti di conoscenza da leggere con la decodifica dei contenuti destinati a diventare epistemologia rinnovata e anche metafora del tempo in cui viviamo. Una recente ricerca condotta nella scuola e nell’università evidenzia le dinamiche in atto coagulate intorno alla definizione dell’identità professionale del docente. L’ipotesi da verificare, costruita per l’analisi degli effetti del distanziamento sociale sull’identità professionale del docente, non ha permesso di rilevare una perdita di comunicazione. Si è rafforzato il sentimento di partecipazione sociale, in termini di acquisizione di norme di comportamento valutate come indispensabili per il bene della famiglia, della scuola, della comunità, della società più ampia. La costatazione della risorgente emergenza educativa ha condotto a riformulare i sentieri dell’educazione etica, alla salute, sociale, civile. Ne sono nate azioni di prevenzione e tutela che si sarebbero meglio pianificate nel ritorno a scuola dopo il lockdown.
description: La Ricerca dipartimentale ai tempi del COVID-19
The Connection between Star Formation and Metallicity Evolution in Barred Spiral Galaxies
Creators: name: Martel, Hugo
name: Kawata, Daisuke
name: Ellison, Sara L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We have performed a series of chemodynamical simulations of barred disc galaxies. Our goal is to determine the physical processes responsible for the increase in the central gas-phase metallicity and of the central SFR observed in SDSS. We define a 2kpc diameter central aperture to approximate the integrated spectroscopic fibre measurements from the SDSS. The chemical evolution observed within this central region depends critically upon the relative size of the bar and the aperture, which evolves strongly with time. At t~0.5Gyr, a strong bar forms, whose length is considerably longer than the 2kpc aperture. The stars and gas lose angular momentum and follow elongated orbits that cause an intense mixing of the gas between the central region and its surroundings. During the next 1.5Gyr, the orbits of the gas contract significantly until the entire gas bar is contained in the 2kpc aperture, resulting in a net flux of gas into the central region. During this period, the metallicity in the central region increases steadily, and this enrichment is dominated by metal-rich gas that is flowing into the central region. The main result of this work is therefore that the observed enrichment in the centres of barred galaxies is not dominated by in-situ enrichment by stars formed in the centre. Rather, star formation occurs along the full length of the bar, much of which occurs initially outside the 2kpc aperture. About 50% of the metals that end up in the central region originate from this extended bar-long star formation, but flow into the central region due to loss of angular momentum. We conclude that there is no direct connection between central SFR and central metallicity. The central metallicity does not originate exclusively from central stars. Instead, the global SFR (especially along the bar) and the large-scale flow of enriched gas play a major role.
description: Accepted for publication in MNRAS
Yangian symmetric correlators
Creators: name: Chicherin, D.
name: Kirschner, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Similarity transformations and eigenvalue relations of monodromy operators composed of Jordan-Schwinger type L matrices are considered and used to define Yangian symmetric correlators of n-dimensional theories. Explicit expressions are obtained and relations are formulated. In this way basic notions of the Quantum inverse scattering method provide a convenient formulation for high symmetry and integrability not only in lower dimensions.
description: 21 pages, 2 figures, comments and reference added
A new method for computing the expected hitting time between arbitrary different configurations of the multiple-urn Ehrenfest model
Creators: name: Song, Sai
name: Yao, Qiang
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 60C05, 60J10

description: We study a multiple-urn version of the Ehrenfest model. In this setting, we denote the n urns by Urn 1 to Urn n, where n>=2. Initially, M balls are randomly placed in the n urns. At each subsequent step, a ball is selected and put into the other n-1 urns with equal probability. The expected hitting time leading to a change of the M balls' status is computed using the method of stopping times. As a corollary, we obtain the expected hitting time of moving all the M balls from Urn 1 to Urn 2. This proves a conjecture which was recently made in Chen et al.(2017).
description: 14 pages
title:  I cambiamenti dei comportamenti religiosi ai tempi della pandemia
Creators: name: Canta, Carmelina Chiara
Publisher: name: RomaTrE-Press
Year: 2021

description: La pandemia Covid-19 ha comportato conseguenze e trasformazioni prefigurando scenari inediti sul piano economico, sociale e personale, determinando anche nel campo della ricerca l’urgenza di esplorarne le ricadute. Il volume dà quindi conto delle indagini svolte e in corso, sin dai primi giorni del lockdown, dai docenti e dai collaboratori del Dipartimento di Scienze della Formazione dell’Università Roma Tre, toccando i temi più diversi: dalla didattica a distanza, all’università e nei diversi ordini di scuola, al futuro dei servizi di orientamento, dal lavoro socio-educativo nelle varie tipologie di servizi all’impatto della pandemia sulle comunità, dalle narrazioni ai linguaggi artistici a contrasto di quest’emergenza non solo sanitaria. Si sono così esplorate le diverse educazioni possibili, riassegnando centralità ai processi formativi e al benessere delle persone, provando a tratteggiare nuovi paradigmi e prospettive.
description: Quanto sta accadendo in questo periodo pandemico cambia il modo di vivere la fede e il rapporto con la religione? È questa la domanda alla quale si cerca di dare una risposta nel saggio. Si affrontano perciò alcuni aspetti sulle modalità del ‘sentire religioso’, nel periodo del Covid 19, dal 2020 fino ad oggi. In particolare si riconosce il ruolo di Papa Francesco, figura di riferimento nella prima fase della pandemia e il valore simbolico dei suoi gesti per i cattolici, le altre religioni e il mondo. Un altro aspetto riguarda il significato della solitudine del morente di Covid 19, privato della celebrazione di un rito, e del conforto dei suoi cari, incapaci di “elaborare il lutto”. I dati di una ricerca empirica, condotta nel periodo della pandemia, sono significativi per comprendere le dinamiche della religiosità e per ridisegnare il futuro della religione nel post-Covid.
description: La Ricerca dipartimentale ai tempi del COVID-19
title: Globalization, regulation and profitability of banks: a comparative analysis of Europe, United States, India and China
Creators: name: Paulet, Elisabeth
name: Mavoori, Hareesh
Publisher: name: Università Carlo Cattaneo - LIUC
Year: 2019

description: The last financial crisis spurred regulators to emphasize enhanced stability indicators for financial institutions. Therefore, banks have to take into account this new element while defining their strategic decisions and their profitability. The aim of this paper is to provide evidence of the transformation of banking activities on a global scale comparing different regulatory and governance regimes. Using a sample of 102 banks from 4 geographic regions (United States, Europe, China, India) we propose pooled and regional models to highlight the parameters that explain profitability and risk management of banks. Leveraging 2000-2016 monthly data, our empirical analysis underlines the regional differences in profitability, which influence global stability of banking institutions. We find that increasing market capitalization often induces increased performance as expected; however a regional analysis of its impact reveals more nuanced geospatial variations and insights for risk management purposes. In particular, China constitutes an interesting case study as regards the impact of government on the performance of banking institutions, with this effect being cross validated by models contrasting private and public sector banks with different levels of government controls.
Efficiency Analysis of Swarm Intelligence and Randomization Techniques
Creators: name: Yang, Xin-She
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Swarm intelligence has becoming a powerful technique in solving design and scheduling tasks. Metaheuristic algorithms are an integrated part of this paradigm, and particle swarm optimization is often viewed as an important landmark. The outstanding performance and efficiency of swarm-based algorithms inspired many new developments, though mathematical understanding of metaheuristics remains partly a mystery. In contrast to the classic deterministic algorithms, metaheuristics such as PSO always use some form of randomness, and such randomization now employs various techniques. This paper intends to review and analyze some of the convergence and efficiency associated with metaheuristics such as firefly algorithm, random walks, and Lévy flights. We will discuss how these techniques are used and their implications for further research.
description: 10 pages. arXiv admin note: substantial text overlap with arXiv:1212.0220, arXiv:1208.0527, arXiv:1003.1466
title: Worker mobility and the purchase of low CO2 emission vehicles in France: a datamining approach
Creators: name: Boroumand, Raphaël Homayoun
name: Goutte, Stéphane
name: Péran, Thomas
name: Porcher, Thomas
Publisher: name: Università Carlo Cattaneo - LIUC
Year: 2019

description: This paper seeks to pattern a non-driven geographical classification of French departmental territorial units based on both mobility behavior and passenger car fleet composition. With no mathematical regression analysis but applying datamining methodology to behavior, consumption and geography variables, we have grouped French territorial units into 8 clusters with similar characteristics. The main results reveal that commuters’ behavior with respect to the choice of transport mode varies substantially across clusters (rural and highly rural, urban and highly urban clusters, ...). Conversely, the structure of the French vehicle fleet and French car purchases in terms of engines, tax horsepower and CO2 emissions are similar. This finding should enable state organizations to implement differentiated public policies for environmental and industrial sectors. Alternatively, our paper should help industrial groups to better deploy their economic strategies in line with environmental concerns.
Asymptotic behaviour of solutions to fractional diffusion-convection equations
Creators: name: Ignat, Liviu
name: Stan, Diana
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider a convection-diffusion model with linear fractional diffusion in the sub-critical range. We prove that the large time asymptotic behavior of the solution is given by the unique entropy solution of the convective part of the equation. The proof is based on suitable a-priori estimates, among which proving an Oleinik type inequality plays a key role.
description: 24p, typos corrected