cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Measuring parameters of AGN central engines with very high energy gamma-ray flares
Creators: name: Neronov, A.
name: Semikoz, D.
name: Sibiryakov, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss a "compact source" model of very high energy (VHE) emission from blazars in which the variability time is determined by the blazar central engine. In this model electron or proton acceleration close to the supermassive black hole is followed by the development of electromagnetic cascade in a radiatively inefficient accretion flow. Assuming such a model for the TeV blazar PKS 2155-304, we show that the variability properties of the TeV gamma-ray signal observed during a bright flare from this source, such as the minimal variability time scale and the recurrence period of the sub-flares, constrain the mass and the angular momentum of the supermassive black hole.
description: 11 pages, 3 figure, accepted to MNRAS
Finite Resolution Deconvolution of Multi-Wavelength Imaging of 20,000 Galaxies in the COSMOS Field: The Evolution of Clumpy Galaxies Over Cosmic Time
Creators: name: Sok, Visal
name: Muzzin, Adam
name: Jablonka, Pascale
name: Marsan, Z. Cemile
name: Tan, Vivian
name: Alcorn, Leo
name: Marchesini, Danilo
name: Stefanon, Mauro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Compact star-forming clumps observed in distant galaxies are often suggested to play a crucial role in galaxy assembly. In this paper, we use a novel approach of applying finite resolution deconvolution on ground-based images of the COSMOS field to resolve 20,185 star-forming galaxies (SFG) at 0.5
A Search for the Most Massive Galaxies. II. Structure, Environment and Formation
Creators: name: Bernardi, M.
name: Hyde, J. B.
name: Fritz, A.
name: Sheth, R. K.
name: Gebhardt, K.
name: Nichol, R. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study a sample of 43 early-type galaxies, selected from the SDSS because they appeared to have velocity dispersion > 350 km/s. High-resolution photometry in the SDSS i passband using HRC-ACS on board the HST shows that just less than half of the sample is made up of superpositions of two or three galaxies, so the reported velocity dispersion is incorrect. The other half of the sample is made up of single objects with genuinely large velocity dispersions. None of these objects has sigma larger than 426 +- 30 km/s. These objects define rather different relations than the bulk of the early-type galaxy population: for their luminosities, they are the smallest, most massive and densest galaxies in the Universe. Although the slopes of the scaling relations they define are rather different from those of the bulk of the population, they lie approximately parallel to those of the bulk "at fixed sigma". These objects appear to be of two distinct types: the less luminous (M_r>-23) objects are rather flattened and extremely dense for their luminosities -- their properties suggest some amount of rotational support and merger histories with abnormally large amounts of gaseous dissipation. The more luminous objects (M_r
description: 21 pages, 19 figures, accepted for publication in MNRAS
Assessing the Integration of Software Agents and Industrial Automation Systems with ISO/IEC 25010
Creators: name: Karnouskos, Stamatis
name: Sinha, Roopak
name: Leitão, Paulo
name: Ribeiro, Luis
name: Strasser, Thomas. I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Agent-technologies have been used for higher-level decision making in addition to carrying out lower-level automation and control functions in industrial systems. Recent research has identified a number of architectural patterns for the use of agents in industrial automation systems but these practices vary in several ways, including how closely agents are coupled with physical systems and their control functions. Such practices may play a pivotal role in the Cyber-Physical System integration and interaction. Hence, there is a clear need for a common set of criteria for assessing available practices and identifying a best-fit practice for a given industrial use case. Unfortunately, no such common criteria exist currently. This work proposes an assessment criteria approach as well as a methodology to enable the use case based selection of a best practice for integrating agents and industrial systems. The software product quality model proposed by the ISO/IEC 25010 family of standards is used as starting point and is put in the industrial automation context. Subsequently, the proposed methodology is applied, and a survey of experts in the domain is carried out, in order to reveal some insights on the key characteristics of the subject matter.
description: Conference paper, 7 pages, 2 figures, 1 table
Horizontal Branch Morphology and Mass Loss in Globular Clusters
Creators: name: Dotter, Aaron
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The connection between mass loss on the red giant branch (RGB) and horizontal branch (HB) morphology in globular clusters (GCs) has long been acknowledged but the mechanisms governing mass loss remains poorly understood from a theoretical perspective. The present study uses synthetic HB models to demonstrate for the first time that alpha-enhancement and a simple relation between mass loss and metallicity can explain the entire range of HB morphology (characterized by the HB type index) observed in old, coeval GCs. The mass loss-metallicity relation accounts naturally for the fact that the most metal poor GCs ([Fe/H] < -2) have redder HBs than is typical of GCs with -2 < [Fe/H] < -1.5 without invoking younger ages. These results may prove useful in studying the contribution of HB stars to integrated light via stellar population synthesis.
description: 13 pages, 5 figures, to appear in ApJ Letters (figure 2 may not display correctly in some PDF viewers)
Optoelectronic sampling of ultrafast electric transients with single quantum dots
Creators: name: Widhalm, Alex
name: Krehs, Sebastian
name: Siebert, Dustin
name: Sharma, Nand Lal
name: Langer, Timo
name: Jonas, Björn
name: Reuter, Dirk
name: Thiede, Andreas
name: Förstner, Jens
name: Zrenner, Artur
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In our work, we have engineered low capacitance single quantum dot photodiodes as sensor devices for the optoelectronic sampling of ultrafast electric signals. By the Stark effect, a time-dependent electric signal is converted into a time-dependent shift of the transition energy. This shift is measured accurately by resonant ps laser spectroscopy with photocurrent detection. In our experiments, we sample the laser synchronous output pulse of an ultrafast CMOS circuit with high resolution. With our quantum dot sensor device, we were able to sample transients below 20 ps with a voltage resolution in the mV-range.
An obstacle to populating the string theory landscape
Creators: name: Johnson, Matthew C
name: Larfors, Magdalena
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct domain walls and instantons in a class of models with coupled scalar fields, determining, in agreement with previous studies, that many such solutions contain naked timelike singularities. Vacuum bubble solutions of this type do not contain a region of true vacuum, obstructing the ability of eternal inflation to populate other vacua. We determine a criterion that potentials must satisfy to avoid the existence of such singularities, and show that many domain wall solutions in Type IIB string theory are singular. This has profound implications for applying the program of eternal inflation to making predictions in the string theory landscape.
description: 5 PRD style pages with 2 embedded figures. Replaced to match published version
20 years of concert research at the University of Oslo
Creators: name: Jensenius, Alexander Refsum
Publisher: name: Zenodo
Year: 2024

description: In my talk I will give an overview of the concert research conducted in the fourMs Lab at the University of Oslo from the early 2000s to today. Over the years, we have explored and refined numerous data captures methods, from qualitative observation studies, interviews, and diaries to motion capture and physiological sensing. At the core has always been the attempt to shed light on the complexity of music performance. This includes understanding more about the subtleties of performer's sound-producing actions, sound-facilitating motion, and communicative and expressive gestures. It also includes the intricacies of inter-personal synchronization. Over the years, we have been able to expand from studying duos, trios, and quartets to full orchestras. Today, we have lots of data, some answers, and even more questions than when we started. An excellent starting point for future research.
title: Phone-to-Phone Communication for Adaptive Image Classification
Creators: name: Bruns, Erich
name: Bimber, Oliver
Publisher: name: Bauhaus-Universität Weimar
Year: 2008
Subjects: subject: Peer-to-Peer-Netz
subject: Bilderkennung
subject: Museumsführer
subject: Ad-hoc-Netz
subject: 004

description: In this paper, we present a novel technique for adapting local image classifiers that are applied for object recognition on mobile phones through ad-hoc network communication between the devices. By continuously accumulating and exchanging collected user feedback among devices that are located within signal range, we show that our approach improves the overall classification rate and adapts to dynamic changes quickly. This technique is applied in the context of PhoneGuide – a mobile phone based museum guidance framework that combines pervasive tracking and local object recognition for identifying a large number of objects in uncontrolled museum environments.
Following the flow for large N and large charge
Creators: name: Orlando, Domenico
name: Reffert, Susanne
name: Schmidt, Tim
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss the O(2N) vector model in three dimensions. While this model flows to the Wilson-Fisher fixed point when fine tuned, working in a double-scaling limit of large N and large charge allows us to study the model away from the critical point and even to follow the RG flow from the UV to the IR. The crucial observation is that the effective potential -- at leading order in N but exact to all orders in perturbation theory -- is the Legendre transform of the grand potential at fixed charge. This allows us to write an effective action and the free energy for generic values of the coupling in a very simple fashion and without evaluating any Feynman diagrams.
description: 20 pages, 4 figures
Quiver Varieties and Branching
Creators: name: Nakajima, Hiraku
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Algebra (math.QA)
subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 14D21, 17B65

description: Braverman and Finkelberg recently proposed the geometric Satake correspondence for the affine Kac-Moody group $G_\aff$ [Braverman A., Finkelberg M., arXiv:0711.2083]. They conjecture that intersection cohomology sheaves on the Uhlenbeck compactification of the framed moduli space of $G_{\mathrm{cpt}}$-instantons on $\R^4/\Z_r$ correspond to weight spaces of representations of the Langlands dual group $G_\aff^\vee$ at level $r$. When $G = \SL(l)$, the Uhlenbeck compactification is the quiver variety of type $\algsl(r)_\aff$, and their conjecture follows from the author's earlier result and I. Frenkel's level-rank duality. They further introduce a convolution diagram which conjecturally gives the tensor product multiplicity [Braverman A., Finkelberg M., Private communication, 2008]. In this paper, we develop the theory for the branching in quiver varieties and check this conjecture for $G=\SL(l)$.
description: 37 pages
La vie après-voiture, ou comment les ménages démotorisés s’adaptent à un quotidien sans voiture personnelle
Creators: name: Korsu, Emre
name: Aguilera, Anne
name: Proulhac, Laurent
Publisher: name: Univ Gustave Eiffel
Year: 2021
Subjects: Sciences de l'Homme et Société
GEOGRAPHIE
SOCIOLOGIE

description: Cet article s’intéresse à la mobilité des ménages français (intégralement) démotorisés, c’est-à-dire ne possédant plus d’automobile mais en ayant eu au moins une par le passé. Si leur nombre est faible (seulement 8 % des ménages en France selon l’Enquête Nationale Transports et Déplacements (ENTD) de 2008), leur cas est intéressant pour la recherche scientifique et l’action publique dans une perspective d’un monde post-automobile personnelle. L’article pose la question des modalités d’adaptation de leurs pratiques de mobilité à un quotidien sans voiture particulière. L’article fait l’hypothèse de différences d’une part entre ménages motorisés, démotorisés et ménages sans voiture mais n’en ayant jamais possédé, d’autre part selon que la démotorisation est plutôt contrainte ou choisie, et enfin selon l’ancienneté de la démotorisation, susceptible de favoriser des formes de réorganisation spécifiques des modes de vie. Les éléments de réponse sont issus de l’exploitation statistique de deux grandes enquêtes nationales, l’ENTD (2008) et le Panel Parc Auto (2015). Nous discutons à la fin des résultats obtenus dans une perspective d’action publique qui se donnerait pour objectif de stimuler les décisions de démotorisation des ménages.
description: RTS - Recherche Transports Sécurité, volume 2021
Learning Implicit User Profiles for Personalized Retrieval-Based Chatbot
Creators: name: Qian, Hongjin
name: Dou, Zhicheng
name: Zhu, Yutao
name: Ma, Yueyuan
name: Wen, Ji-Rong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: In this paper, we explore the problem of developing personalized chatbots. A personalized chatbot is designed as a digital chatting assistant for a user. The key characteristic of a personalized chatbot is that it should have a consistent personality with the corresponding user. It can talk the same way as the user when it is delegated to respond to others' messages. We present a retrieval-based personalized chatbot model, namely IMPChat, to learn an implicit user profile from the user's dialogue history. We argue that the implicit user profile is superior to the explicit user profile regarding accessibility and flexibility. IMPChat aims to learn an implicit user profile through modeling user's personalized language style and personalized preferences separately. To learn a user's personalized language style, we elaborately build language models from shallow to deep using the user's historical responses; To model a user's personalized preferences, we explore the conditional relations underneath each post-response pair of the user. The personalized preferences are dynamic and context-aware: we assign higher weights to those historical pairs that are topically related to the current query when aggregating the personalized preferences. We match each response candidate with the personalized language style and personalized preference, respectively, and fuse the two matching signals to determine the final ranking score. Comprehensive experiments on two large datasets show that our method outperforms all baseline models.
description: Accepted by CIKM 2021, codes and dataset will be released at https://github.com/qhjqhj00/CIKM2021-IMPChat
title: Οι οικονομικές και κοινωνικές προεκτάσεις των παχύσαρκων - υπέρβαρων παιδιών στην Ελλάδα. Η έλλειψη πρόληψης και θέματα υγείας
title: The economic and social implications of the obese and over-weighted children in Greece. Absence of prevention in Greece and health issues
titleType: AlternativeTitle
Creators: name: Βούρκας, Γεώργιος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Οικονομικές προεκτάσεις
subject: Κοινωνικές προεκτάσεις
subject: Παχυσαρκία
subject: Υπέρβαρα παιδιά
subject: Πρόληψη
subject: Διατροφή
subject: Άσκηση

description: Η παχυσαρκία είναι μία από τις σοβαρότερες προκλήσεις της δημόσιας υγείας του 21ου αιώνα. Οι συνέπειες της παιδικής παχυσαρκίας μπορεί να επηρεάσουν βαθιά τη σωματική υγεία των παιδιών, αλλά και την κοινωνική και συναισθηματική ευημερία και την αυτοεκτίμηση τους. Σκοπός της εργασίας είναι να διερευνήσει τις οικονομικές και κοινωνικές προεκτάσεις των παχύσαρκων-υπέρβαρων παιδιών, τονίζοντας τη σημασία πρόληψης και κάνοντας αναφορά στις αδυναμίες που χαρακτηρίζουν τη διαχείριση του ζητήματος αυτού στη χώρα μας. Το κοινωνικοοικονομικό επίπεδο θεωρείται πως είναι ένας καθοριστικός παράγοντας της εμφάνισης της κεντρικής παχυσαρκίας στην παιδική ηλικία, με την εν λόγω σχέση να είναι πολύπλοκη και να επηρεάζεται σημαντικά από δημογραφικούς παράγοντες. Η έγκαιρη πρόληψη θεωρείται πρωταρχικό μέτρο αντιμετώπισης της παιδικής παχυσαρκίας. Τα αποδεικτικά στοιχεία αναδεικνύουν τη σημαντικότητα της διατροφής, τις διατροφικές συμπεριφορές, τη σωματική δραστηριότητα ενώ σημαντική είναι και η θεραπεία στο πλαίσιο της ψυχολογικής στήριξης ιδίως μέσα από προγράμματα γνωστικής συμπεριφορικής θεραπείας. Η ολιστική προσέγγιση παρέμβασης της παιδικής παχυσαρκίας είναι απαραίτητη για την Ελλάδα που έχει πρωτιά παγκοσμίως στην παιδική παχυσαρκία και σημαντικές ελλείψεις στο ζήτημα διαχείρισης του θέματος.
Chow groups of K3 surfaces and spherical objects
Creators: name: Huybrechts, Daniel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We show that for a K3 surface X the finitely generated subring R(X) of the Chow ring introduced by Beauville and Voisin is preserved under derived equivalences. This is proved by analyzing Chern characters of spherical bundles. As for a K3 surface X defined over a number field all spherical bundles on the associated complex K3 surface are defined over $\bar\QQ$, this is compatible with the Bloch-Beilinson conjecture. Besides the work of Beauville and Voisin, Lazarfeld's result on Brill-Noether theory for curves in K3 surfaces and the deformation theory developed with Macri and Stellari in arXiv:0710.1645 are central for the discussion.
description: 18 pages, minor modifcations and corrections, to appear in JEMS
Accurate sky signal reconstruction for ground-based spectroscopy with kinetic inductance detectors
Creators: name: Fasano., A.
name: Macías-Pérez, J. F.
name: Benoit, A.
name: Aguiar, M.
name: Beelen, A.
name: Bideaud, A.
name: Bounmy, J.
name: Bourrion, O.
name: Bres, G.
name: Calvo, M.
name: Castro-Almazán, J. A.
name: Catalano, A.
name: de Bernardis, P.
name: De Petris, M.
name: de Taoro, A. P.
name: Fernández-Torreiro, M.
name: Garde, G.
name: Génova-Santos, R.
name: Gomez, A.
name: Gómez-Renasco, M. F.
name: Goupy, J.
name: Hoarau, C.
name: Hoyland, R.
name: Lagache, G.
name: Marpaud, J.
name: Marton, M.
name: Monfardini, A.
name: Peel, M. W.
name: Pisano, G.
name: Ponthieu, N.
name: Rebolo, R.
name: Roudier, S.
name: Rubiño-Martín, J. A.
name: Tourres, D.
name: Tucker, C.
name: Vescovi, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context. Wide-field spectrometers are needed to deal with current astrophysical challenges that require multiband observations at millimeter wavelengths. An example of these is the KIDs Interferometer Spectrum Survey (KISS), which uses two arrays of kinetic inductance detectors (KIDs) coupled to a Martin-Puplett interferometer (MPI). KISS has a wide instantaneous field of view (1 deg in diameter) and a spectral resolution up to 1.45 GHz in the 120-180 GHz electromagnetic band. The instrument is installed on the 2.25 m Q-U-I JOint TEnerife telescope in Teide Observatory (Tenerife, Canary Islands), at an altitude of 2395 m above sea level. Aims. This work presents an original readout modulation method developed to improve the sky signal reconstruction accuracy for types of instruments for which a fast sampling frequency is required both to remove atmospheric fluctuations and to perform full spectroscopic measurements on each sampled sky position. Methods. We first demonstrate the feasibility of this technique using simulations. Then, we apply such a scheme to on-sky calibration. Results. We show that the sky signal can be reconstructed to better than 0.5% for astrophysical sources, and to better than 2% for large background variations such as in "skydip", in an ideal noiseless scenario. The readout modulation method is validated by observations on-sky during the KISS commissioning campaign. Conclusions. We conclude that accurate photometry can be obtained for future KID-based MPI.
description: 11 pages, 10 figures, accepted for publication in A&A
Repositorio Concepción Cabrera
Creators: name: Ibarra Robles, Rodolfo Saúl
Publisher: name: Zenodo
Year: 2021
Subjects: subject: Repositorio
subject: Concepción Cabrera
subject: Patrimonio Cultural
subject: Mujer mexicana
subject: Escritora
subject: Espiritualidad de la Cruz
subject: Beata
subject: https://sites.google.com/view/concepcioncabrera/inicio

description: Es un repositorio que permite consultar, investigar y descargar los textos y manuscritos originales de la beata Concepción Cabrera de su autobiografía "VIDA". También, este repositorio ofrece la información detallada y seleccionada por temas como literatura, historia y religión; a través de ellos se presenta la propuesta de la Beata que hoy en día es Patrimonio Cultural.
description: {"references": ["Castro C. (2018). Concepci\u00f3n, esposa y madre. Editorial la cruz.", "Cabrera, C. (1936).Cuenta de Conciencia, tomos 1-66, edici\u00f3n privada, M\u00e9xico Cabrera, C. Autobiograf\u00eda, edici\u00f3n privada.", "Cabrera, C. (1909) Vida, tomos I-X, edici\u00f3n privada.", "Guti\u00e9rrez, J. (1998). Cruz de Jes\u00fas: vida m\u00edstica e itinerario espiritual. Tomo I. Editorial la Cruz.", "Foulard, C. (2017). Hacia los l\u00edmites del cuerpo: Pr\u00e1cticas penitenciales de una m\u00edstica cat\u00f3lica en la Revoluci\u00f3n Mexicana. Trace. Travaux et recherches dans les Am\u00e9riques du Centre, (72).", "Vera, C. (2007). Flor de M\u00e9xico. El itinerario espiritual de Concepci\u00f3n Cabrera de Armida. M\u00e9xico, CIDEC.", "Vera, C (2009). Eco de mis amores. Selecci\u00f3n de textos de Concepci\u00f3n Cabrera de Armida. M\u00e9xico, CIDEC."]}
A quantum route to the classical Lagrangian formalism
Creators: name: Ciaglia, Florio M.
name: Di Cosmo, Fabio
name: Ibort, Alberto
name: Marmo, Giuseppe
name: Schiavone, Luca
name: Zampini, Alessandro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Using the recently developed groupoidal description of Schwinger's picture of Quantum Mechanics, a new approach to Dirac's fundamental question on the role of the Lagrangian in Quantum Mechanics is provided. It is shown that a function $\ell$ on the groupoid of configurations (or kinematical groupoid) of a quantum system determines a state on the von Neumann algebra of the histories of the system. This function, which we call {\itshape q-Lagrangian}, can be described in terms of a new function $\mathcal{L}$ on the Lie algebroid of the theory. When the kinematical groupoid is the pair groupoid of a smooth manifold $M$, the quadratic expansion of $\mathcal{L}$ will reproduce the standard Lagrangians on $TM$ used to describe the classical dynamics of particles.
description: 12 pages
Proceedings 12th International Symposium on Games, Automata, Logics, and Formal Verification
Creators: name: Ganty, Pierre
name: Bresolin, Davide
Publisher: name: arXiv
Year: 2021
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: Computer Science and Game Theory (cs.GT)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: This volume contains the proceedings of the 12th International Symposium on Games, Automata, Logic and Formal Verification (GandALF 2021). The aim of GandALF 2021 symposium is to bring together researchers from academia and industry which are actively working in the fields of Games, Automata, Logics, and Formal Verification. The idea is to cover an ample spectrum of themes, ranging from theory to applications, and stimulate cross-fertilization.
title: Front Matter, Table of Contents, Preface, Conference Organization, External Reviewers, List of Authors
Creators: name: Martens, Wim
name: Zeume, Thomas
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2016
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Conference Organization
subject: External Reviewers
subject: List of Authors

description: Front Matter, Table of Contents, Preface, Conference Organization, External Reviewers, List of Authors
description: LIPIcs, Vol. 48, 19th International Conference on Database Theory (ICDT 2016), pages 0:i-0:xvi
Hafnia-based Double Layer Ferroelectric Tunnel Junctions as Artificial Synapses for Neuromorphic Computing
Creators: name: Max, Benjamin
name: Hoffmann, Michael
name: Mulaosmanovic, Halid
name: Slesazeck, Stefan
name: Mikolajick, Thomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Emerging Technologies (cs.ET)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Ferroelectric tunnel junctions (FTJ) based on hafnium zirconium oxide (Hf1-xZrxO2; HZO) are a promising candidate for future applications, such as low-power memories and neuromorphic computing. The tunneling electroresistance (TER) is tunable through the polarization state of the HZO film. To circumvent the challenge of fabricating thin ferroelectric HZO layers in the tunneling range of 1-3 nm range, ferroelectric/dielectric double layer sandwiched between two symmetric metal electrodes are used. Due to the decoupling of the ferroelectric polarization storage layer and a dielectric tunneling layer with a higher bandgap, a significant TER ratio between the two polarization states is obtained. By exploiting previously reported switching behaviour and the gradual tunability of the resistance, FTJs can be used as potential candidates for the emulation of synapses for neuromorphic computing in spiking neural networks. The implementation of two major components of a synapse are shown: long term depression/potentiation by varying the amplitude/width/number of voltage pulses applied to the artificial FTJ synapse, and spike-timing-dependent-plasticity curves by applying time-delayed voltages at each electrode. These experimental findings show the potential of spiking neural networks and neuromorphic computing that can be implemented with hafnia-based FTJs.
A Joint Top Income and Wealth Distribution
Creators: name: Steiner, Viktor
name: Zhu, Junyi
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: income and wealth joint distribution
subject: copula
subject: heavy-tailed distributions
subject: external consistency
subject: incidental truncation
subject: 300 Sozialwissenschaften::330 Wirtschaft::336 Öffentliche Finanzen

description: Top distributions of income and wealth are still incompletely measured in many national statistics, particularly when using survey data. This paper develops the technique of incorporating the joint distributional relationship to enhance the estimation of these two top distributions by using the best data available for Germany. We leverage the bivariate copula to extrapolate both income and wealth distributions from German PHF (Panel on Household Finance) data under the incidental truncation model. The copula modelling grants the separability in choosing the estimation domain as well as the parametric specification between the marginal distribution and dependence structure. One distinct feature of our paper is to complement the model fit with external validation. The copula estimate can help us to perform out-of-sample prediction on the very top of the tail distribution from one margin conditional on the characteristics of the other. The validation exercises show that our copula-based approach can approximate much closer to the top tax data and wealth “rich list” than those unconditional marginal extrapolations. The data and effectiveness of our copula-based approach also verify our presumption of incidental truncation and differential detectability in the top lists.
L’expérimentation des véhicules autonomes : quelle place dans le processus d’innovation ? Le cas du projet Rouen Normandy Autonomous Lab
Creators: name: Buisson, Lucile
name: Nicolas, Jean-Pierre
name: Gouget, Nathalie
Publisher: name: Univ Gustave Eiffel
Year: 2021
Subjects: Sciences de l'Homme et Société
SOCIOLOGIE

description: La phase actuelle de développement du véhicule autonome se manifeste notamment par une multiplication des expérimentations. Cependant, peu de travaux se penchent sur ces dernières en tant que témoins du processus d’innovation à l’œuvre. En vue d’apporter cet éclairage, nous proposons une grille d’analyse dédiée, basée sur la notion de niche. Nous l’appliquons au projet Rouen Normandy Autonomous Lab, qui a eu lieu à Saint-Étienne-du-Rouvray, dans la Métropole de Rouen, entre octobre 2017 et décembre 2019. Nous déterminons le type d’acteurs présents, leurs régimes d’appartenance et les « phénomènes » internes et externes à la niche. Nous montrons l’adéquation de cette approche à l’étude des expérimentations de véhicules autonomes et dégageons certaines similitudes avec d’autres contextes d’innovation. Ainsi, nous mettons en exergue l’importance de la formation d’un réseau d’acteurs et la prévalence des attentes fonctionnelles, celles portant sur le rôle actuel du projet, dans la poursuite d’expérimentations de véhicules autonomes au niveau local.
description: RTS - Recherche Transports Sécurité, volume 2021
title: Psychophysical Measurements of Temporal Integration Effects in Cochlear Implant Users
Creators: name: Dietze, Anna
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018
Subjects: subject: Cochlear Implant; Temporal Integration; Stimulation Rate
subject: 150
subject: 570
subject: 620

description: In this study, the effect of high stimulation rates on temporal integration in cochlear implant hearing was investigated. We measured threshold amplitudes, maximal acceptable levels and a line of equal loudness in 11 cochlear implant users (all with implants from MED-EL). The measurements were done (a) with a clinically used single channel stimulation rate of 1500 pulses per second (pps) and (b) at a high stimulation rate of 18000 pps, both for an apical electrode and a basal electrode. The duration of the stimulation pulse trains varied from 1 pulse to 5400 pulses. Additionally, we collected data on the perception of the different stimulation rates and stimulation electrodes using a questionnaire. A power-law like function was used to fit the threshold amplitudes of individual subjects with a high accuracy (R² = 0.96 +/- 0.05). The change of the stimulation electrode did not cause any systematic effects regarding threshold amplitudes or the slope of the temporal integration (TI) curve. We found lower thresholds for the high rate and slopes of 3.48 dB and 5.55 dB per tenfold increase in duration for the low and high rate, respectively. The DR was increased with the high rate by 6.58 +/- 3.79 dB. Since the increased DRs at the high rate were accompanied by higher variability of the given answers, the same number of audible loudness steps in the given DR is expected for both rates. Some of the subjects perceived the change in stimulation rate with a change in pitch, whereas most participants were only sensitive to a variation of the stimulation electrode. It is noteworthy, that besides pitch, the perception of other characteristics like sharpness are affected by changes in stimulation rate and stimulation electrode.
Nuclear Charge Radii of Be-7,9,10 and the one-neutron halo nucleus Be-11
Creators: name: Nörtershäuser, W.
name: Tiedemann, D.
name: Žáková, M.
name: Andjelkovic, Z.
name: Blaum, K.
name: Bissell, M. L.
name: Cazan, R.
name: Drake, G. W. F.
name: Geppert, Ch.
name: Kowalska, M.
name: Krämer, J.
name: Krieger, A.
name: Neugart, R.
name: Sánchez, R.
name: Schmidt-Kaler, F.
name: Yan, Z. -C.
name: Yordanov, D. T.
name: Zimmermann, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Nuclear charge radii of $^{7,9,10,11}$Be have been determined by high-precision laser spectroscopy. On-line measurements were performed with collinear laser spectroscopy in the $2s_{1/2} \to 2p_{1/2}$ transition on a beam of Be$^{+}$ ions. Collinear and anticollinear laser beams were used simultaneously and the absolute frequency determination using a frequency comb yielded an accuracy in the isotope-shift measurements of about 1 MHz. Combination with accurate calculations of the mass-dependent isotope shifts yield nuclear charge radii. The charge radius decreases from $^7$Be to $^{10}$Be and then increases for the halo nucleus $^{11}$Be. When comparing our results with predictions of {\it ab initio} nuclear structure calculations we find good agreement. Additionally, the nuclear magnetic moment of $^7$Be was determined to be $-1.3995(5)μ_{\rm N}$ and that of $^{11}$Be from a previous $β$-NMR measurement was confirmed.
description: 4 pages, 2 figures calculated mass shift values have been re-evaluated with the latest mass values for the beryllium isotopes and the nuclear polarization contribution for Be-11, published by K. Pachucki et al. ater submission of our manuscript, is also included now
Dynamics of the solar tachocline II: the stratified case
Creators: name: Garaud, Pascale
name: Garaud, Jean-Didier D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a detailed numerical study of the Gough & McIntyre model for the solar tachocline. This model explains the uniformity of the rotation profile observed in the bulk of the radiative zone by the presence of a large-scale primordial magnetic field confined below the tachocline by flows originating from within the convection zone. We attribute the failure of previous numerical attempts at reproducing even qualitatively Gough & McIntyre's idea to the use of boundary conditions which inappropriately model the radiative--convective interface. We emphasize the key role of flows downwelling from the convection zone in confining the assumed internal field. We carefully select the range of parameters used in the simulations to guarantee a faithful representation of the hierarchy of expected lengthscales. We then present, for the first time, a fully nonlinear and self-consistent numerical solution of the Gough & McIntyre model which qualitatively satisfies the following set of observational constraints: (i) the quenching of the large-scale differential rotation below the tachocline - including in the polar regions - as seen by helioseismology (ii) the confinement of the large-scale meridional flows to the uppermost layers of the radiative zone as required by observed light element abundances and suggested by helioseismic sound-speed data.
description: 21 pages, 15 figures, submitted to MNRAS
High-Redshift Starbursting Dwarf Galaxies Revealed by GRB Afterglows
Creators: name: Chen, Hsiao-Wen
name: Perley, Daniel A.
name: Pollack, Lindsey K.
name: Prochaska, J. X.
name: Bloom, J. S.
name: Dessauges-Zavadsky, M.
name: Pettini, M.
name: Lopez, S.
name: Dall'Aglio, A.
name: Becker, G. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a study of 15 long-duration gamma-ray burst (GRB) host galaxies at z>2. The GRBs are selected with available early-time afterglow spectra in order to compare interstellar medium (ISM) absorption-line properties with stellar properties of the host galaxies. In addition to five previously studied hosts, we consider new detections for the host galaxies of GRB050820 and GRB060206 and place 2-sigma upper limits to the luminosities of the remaining unidentified hosts. We examine the nature of the host galaxy population and find that (1) the UV luminosity distribution of GRB host galaxies is consistent with expectations from a UV luminosity weighted random galaxy population with a median luminosity of =0.1 L*; (2) there exists a moderate correlation between UV luminosity and SiII 1526 absorption width, which together with the observed large line widths of W(1526)>1.5 Ang for a large fraction of the objects suggests a galactic outflow driven velocity field in the host galaxies; (3) there is tentative evidence for a trend of declining ISM metallicity with decreasing galaxy luminosity in the star-forming galaxy population at z=2-4; (4) the interstellar UV radiation field is found ~ 35-350 times higher in GRB hosts than the Galactic mean value; and (5) additional galaxies are found at < 2" from the GRB host in all fields with known presence of strong MgII absorbers, but no additional faint galaxies are found at < 2" in fields without strong MgII absorbers. Our study confirms that the GRB host galaxies (with known optical afterglows) are representative of unobscured star-forming galaxies at z>2, and demonstrates that high spatial resolution images are necessary for an accurate identification of GRB host galaxies in the presence of strong intervening absorbers.
description: 24 emulateapj pages, 24 figures, ApJ in press; full-resolution version available at http://lambda.uchicago.edu/public/tmp/ghost.pdf
Complexity Measures from Interaction Structures
Creators: name: Kahle, Thomas
name: Olbrich, Eckehard
name: Jost, Juergen
name: Ay, Nihat
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: FOS: Physical sciences

description: We evaluate new complexity measures on the symbolic dynamics of coupled tent maps and cellular automata. These measures quantify complexity in terms of $k$-th order statistical dependencies that cannot be reduced to interactions between $k-1$ units. We demonstrate that these measures are able to identify complex dynamical regimes.
description: 11 pages, figures improved, minor changes to the text
A Search for the Most Massive Galaxies. III. Global and Central Structure
Creators: name: Hyde, J. B.
name: Bernardi, M.
name: Sheth, R. K.
name: Nichol, R. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We used the Advanced Camera for Surveys on board the Hubble Space Telescope to obtain high resolution i-band images of the centers of 23 single galaxies, which were selected because they have SDSS velocity dispersions larger than 350 km/s. The surface brightness profiles of the most luminous of these objects (M_i-23) tend to have steeper `power-law' inner profiles, higher-ellipticity, diskier isophotes, and bulge-to-total ratios of order 0.5 -- all of which suggest that they are `fast-rotators' and rotational motions could have contaminated the velocity dispersion estimate. There are obvious dust features within about 300 pc of the center in about 35% of the sample, predominantly in power-law rather than core galaxies.
description: 27 Pages, 22 Figures, 2 Tables, Accepted for Publication in MNRAS
Spinor Field Realizations of the half-integer $W_{2,s}$ Strings
Creators: name: Wei, Shao-Wen
name: Liu, Yu-Xiao
name: Zhang, Li-Jie
name: Ren, Ji-Rong
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The grading Becchi-Rouet-Stora-Tyutin (BRST) method gives a way to construct the integer $W_{2,s}$ strings, where the BRST charge is written as $Q_B=Q_0+Q_1$. Using this method, we reconstruct the nilpotent BRST charges $Q_{0}$ for the integer $W_{2,s}$ strings and the half-integer $W_{2,s}$ strings. Then we construct the exact grading BRST charge with spinor fields and give the new realizations of the half-integer $W_{2,s}$ strings for the cases of $s=3/2$, 5/2, and 7/2.
description: 16 pages, 2 tables, references added
A Multi-Mission Catalogue of Ultraluminous X-ray Source Candidates
Creators: name: Walton, D. J.
name: Mackenzie, A. D. A.
name: Gully, H.
name: Patel, N. R.
name: Roberts, T. P.
name: Earnshaw, H. P.
name: Mateos, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a new, multi-mission catalogue of ultraluminous X-ray source (ULX) candidates, based on recent data releases from each of the XMM-Newton, Swift and Chandra observatories (the 4XMM-DR10, 2SXPS and CSC2 catalogues, respectively). This has been compiled by cross-correlating each of these X-ray archives with a large sample of galaxies primarily drawn from the HyperLEDA archive. Significant efforts have been made to clean the sample of known non-ULX contaminants (e.g. foreground stars, background AGN, supernovae), and also to identify ULX candidates that are common to the different X-ray catalogues utilized, allowing us to produce a combined 'master' list of unique sources. Our sample contains 1843 ULX candidates associated with 951 different host galaxies, making it the largest ULX catalogue compiled to date. Of these, 689 sources are catalogued as ULX candidates for the first time. Our primary motivation is to identify new sources of interest for detailed follow-up studies, and within our catalogue we have already found one new extreme ULX candidate that has high S/N data in the archive: NGC 3044 ULX1. This source has a peak luminosity of $L_{\rm{X,peak}} \sim 10^{40}$ erg s$^{-1}$, and the XMM-Newton spectrum of the source while at this peak flux is very similar to other, better-studied extreme ULXs that are now understood to be local examples of super-Eddington accretion. This likely indicates that NGC 3044 ULX1 is another source accreting at super-Eddington rates. We expect that this catalogue will be a valuable resource for planning future observations of ULXs - both with our current and future X-ray facilities - to further improve our understanding of this enigmatic population.
description: 18 pages, 7 figures; accepted for publication in MNRAS
Exploring alternatives to the Hamiltonian calculation of the Ashtekar-Olmedo-Singh black hole solution
Creators: name: García-Quismondo, Alejandro
name: Marugán, Guillermo A. Mena
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this article, we reexamine the derivation of the dynamical equations of the Ashtekar-Olmedo-Singh black hole model in order to determine whether it is possible to construct a Hamiltonian formalism where the parameters that regulate the introduction of quantum geometry effects are treated as true constants of motion. After arguing that these parameters should capture contributions from two distinct sectors of the phase space that had been considered independent in previous analyses in the literature, we proceed to obtain the corresponding equations of motion and analyze the consequences of this more general choice. We restrict our discussion exclusively to these dynamical issues. We also investigate whether the proposed procedure can be reconciled with the results of Ashtekar, Olmedo, and Singh, at least in some appropriate limit.
description: 12 pages, accepted for publication in Frontiers of Astronomy and Space Sciences
Neutrino Masses, Baryon Asymmetry, Dark Matter and the Moduli Problem : A Complete Framework
Creators: name: Kumar, Piyush
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recent developments in string theory have led to "realistic" string compactifications which lead to moduli stabilization while generating a hierarchy between the Electroweak and Planck scales at the same time. However, this seems to suggest a rethink of our standard notions of cosmological evolution after the end of inflation and before the beginning of BBN. We argue that within classes of realistic string compactifications, there generically exists a light modulus with a mass comparable to that of the gravitino which generates a large late-time entropy when it decays. Therefore, all known mechanisms of generating the baryon asymmetry of the Universe in the literature have to take this fact into account. In this work, we find that it is still possible to naturally generate the observed baryon asymmetry of the Universe as well as light left-handed neutrino masses from a period of Affleck-Dine(AD) leptogenesis shortly after the end of inflation, in classes of realistic string constructions with a minimal extension of the MSSM below the unification scale (consisting only of right-handed neutrinos) and satisfying certain microscopic criteria described in the text. The consequences are as follows. The lightest left-handed neutrino is required to be virtually massless. The moduli (gravitino) problem can be naturally solved in this framework both within gravity and gauge mediation. The observed upper bound on the relic abundance constrains the moduli-matter and moduli-gravitino couplings since the DM is produced non-thermally within this framework. Finally, although not a definite prediction, the framework naturally allows a light right-handed neutrino and sneutrinos around the electroweak scale which could have important implications for DM as well as the LHC.
description: 41 pages, no figures, journal version added
KUIELab-MDX-Net: A Two-Stream Neural Network for Music Demixing
Creators: name: Minseok Kim
name: Woosung Choi
name: Jaehwa Chung
name: Daewon Lee
name: Soonyoung Jung
Publisher: name: Zenodo
Year: 2021
Subjects: mdx challenge, mdx, music demixing challenge, KUIELab-MDX-Net

description: Uploaded files are trained parameters for KUIELab-MDX-Net.
Tensions et routines autour des formes de l’aménagement viaire d’un centre-ville ordinaire
Creators: name: Claux, Martin
name: Dieudonné, Patrick
Publisher: name: Univ Gustave Eiffel
Year: 2021
Subjects: Sciences de l'Homme et Société
ARCHITECTURE
AMENAGEMENT DE L'ESPACE

description: Nous proposons d’aborder l’évolution de la « culture automobile » au travers de l’aménagement des réseaux viaires ordinaires. Notre prisme est singulier : il porte sur l’analyse d’un processus de production de la voie dans la commune de Plestin-les-Grèves, située dans les Côtes-d’Armor et limitrophe au Finistère. À partir de cet exemple nous cherchons à comprendre quelles sont les lignes de forces qui participent à l’évolution de la culture automobile dans la production d’espaces viaires ordinaires, éloignés des grands projets de voiries des espaces métropolitains. La thèse que nous défendons est celle d’une persistance de certaines routines dans la production viaire qui participe d’une évolution lente de la culture automobile.
description: RTS - Recherche Transports Sécurité, volume 2021