cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The first-principles research on the role of surface in the heavy fermion compound CeRh$_2$Si$_2$
Creators: name: Wang, Yue-Chao
name: Xu, Yuan-Ji
name: Liu, Yu
name: Han, Xing-Jie
name: Zhu, Xie-Gang
name: Yang, Yi-feng
name: Bi, Yan
name: Liu, Hai-Feng
name: Song, Hai-Feng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In the heavy fermion materials, the characteristic energy scales of many exotic strongly correlated phenomena (Kondo effect, magnetic order, superconductivity, etc.) are at milli-electron-volt order, implying that the heavy fermion materials are surface sensitive. Here, we investigate the electronic structures for Si- and Ce-terminated surfaces of CeRh$_2$Si$_2$ by first-principles methods. Our research reveals three notable impacts of surface effects on electronic structures, which are consistent with recent angle-resolved photoemission spectroscopy (ARPES) experiments. Firstly, the relaxation of surface crystal structures changes the relative position of Fermi level, adjusts the dispersion of bands and enhances the Kondo resonance. Secondly, the decrease of the hybridization between the Ce-4$f$ and conduction electrons in the surface layer leads to a weaker Kondo resonance peak and the shift of spin-orbit bands. Thirdly, the variation of crystal electric field around surface Ce atoms affects the splitting of Kondo resonance peaks, and also pushes down the lower-Hubbard bands of surface 4$f$ electrons. Moreover, we find the characteristic of bulk's lower-Hubbard bands, which was overlooked in previous works. Our investigation suggests that these surface effects are potentially important and highlighted in the future researches on properties of strongly correlated materials.
description: 9 pages (text), 5 figures (text), 1 table (text), 6 pages (SI), 6 figures (SI), and 1 table (SI)
Menschen helfen oder in Ruhe tüfteln? Wie sich Mädchen und Jungen einen attraktiven Beruf vorstellen
Creators: name: Funk, Lore
Publisher: name: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG)
Year: 2016

description: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG), IFFOnZeit Nr. 5 (2016)
Near-Infrared Observations of Globular Clusters in NGC 4472, NGC 4594, NGC 3585 and NGC 5813 and Implications for their Ages and Metallicities
Creators: name: Hempel, Maren
name: Zepf, Steve
name: Kundu, Arunav
name: Geisler, Doug
name: Maccarone, Thomas J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present near-infrared photometry of the globular cluster systems of the early-type galaxies NGC 4472, NGC 4594, NGC 3585, and NGC 5813. We combine these near-infrared data, obtained with PANIC at the Magellan Baade 6.5m telescope, with archival optical HST and FORS/VLT data, and use the optical to near-infrared colors to constrain the ages and metallicities of the globular clusters around the target galaxies. For NGC 4472 we have the most extensive near-infrared and optical photometric dataset. These colors show that the NGC 4472 globular cluster system has a broad metallicity distribution and that the clusters are predominantly old (i.e. ages of about 10 Gyr or more). This result agrees well with earlier spectroscopic work on NGC 4472, and is evidence that the combination of optical to near-infrared colors can identify predominantly old systems and distinguish these from systems with a substantial intermediate age component. Based on the smaller sample of combined optical and near-infrared data NGC 4594 and NGC 3585 appear to have predominantly old globular cluster systems, while that of NGC 5813 may have a more significant age spread. We also match our sample of globular clusters with near-infrared and optical photometry to Chandra X-ray source detections in these galaxies, and discuss how the probability that a globular cluster hosts a low-mass X-ray binary depends on metallicity and age.
description: 28 pages,7 figures, 7 tables, accepted for publication in ApJ, corrected coordinates for NGC 4594 globular clusters (Table 5), updated reference
A connection whose curvature is the Lie bracket
Creators: name: Morrison, Kent E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C05; 53C29

description: Let G be a Lie group. On the trivial principal G-bundle over the Lie algebra of G there is a natural connection whose curvature is the Lie bracket. The exponential map is given by parallel transport of this connection. If G is the diffeomorphism group of a manifold, the curvature of the natural connection is the Lie bracket of vectorfields on the manifold. The motion of a ball rolling on an oriented surface is the parallel transport of a similar connection on the trivial SO(3)-bundle over the surface. If the surface is a plane or a sphere, then the curvature of the connection is a scalar multiple of the Lie bracket in the Lie algebra of SO(3).
description: 13 pages, revised and expanded
Fast rotating massive stars and the origin of the abundance patterns in galactic globular clusters
Creators: name: Decressin, T.
name: Meynet, G.
name: Charbonnel, C.
name: Prantzos, N.
name: Ekström, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose the Wind of Fast Rotating Massive Stars scenario to explain the origin of the abundance anomalies observed in globular clusters. We compute and present models of fast rotating stars with initial masses between 20 and 120 Msun for an initial metallicity Z=0.0005 ([Fe/H]=-1.5). We discuss the nucleosynthesis in the H-burning core of these objects and present the chemical composition of their ejecta. We consider the impact of uncertainties in the relevant nuclear reaction rates. Fast rotating stars reach the critical velocity at the beginning of their evolution and remain near the critical limit during the rest of the main sequence and part of the He-burning phase. As a consequence they lose large amounts of material through a mechanical wind which probably leads to the formation of a slow outflowing disk. The material in this slow wind is enriched in H-burning products and presents abundance patterns similar to the chemical anomalies observed in globular cluster stars. In particular, the C, N, O, Na and Li variations are well reproduced by our model. However the rate of the 24Mg(p,gamma) has to be increased by a factor 1000 around 50 MK in order to reproduce the whole amplitude of the observed Mg-Al anticorrelation. We discuss how the long-lived low-mass stars currently observed in globular clusters could have formed out of the slow wind material ejected by massive stars.
description: 16 pages, 17 figures, accepted by A&A
Personalia
Creators: name: IZGOnZeit, Redaktion
Publisher: name: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG)
Year: 2016

description: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG), IFFOnZeit Nr. 5 (2016)
Born-Infeld corrections to Coulombian interactions
Creators: name: Ferraro, Rafael
name: Lipchak, Maria Evangelina
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Two-dimensional Born-Infeld electrostatic fields behaving as the superposition of two point-like charges in the linearized (Maxwellian) limit are worked out by means of a non-holomorphic mapping of the complex plane. The changes underwent by the Coulombian interaction between two charges in Born-Infeld theory are computed. Remarkably, the force between equal charges goes to zero as they approach each other.
description: 7 pages, 6 figures. Enlarged and corrected version
Experimentalpsychologische Genderforschung in Bielefeld
Creators: name: Bohner, Gerd
Publisher: name: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG)
Year: 2016

description: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG), IFFOnZeit Nr. 5 (2016)
Das Kompetenzzentrum Frauen- und Gesundheit NRW
Creators: name: Hornberg, Claudia
name: Wattenberg, Ivonne
Publisher: name: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG)
Year: 2016

description: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG), IFFOnZeit Nr. 5 (2016)
Geschlecht, Umwelt und Gesundheit: GeUmGe-NET
Creators: name: Bolte, Gabriele
Publisher: name: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG)
Year: 2016

description: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG), IFFOnZeit Nr. 5 (2016)
On the effect of overshooting as predicted by the modelling of the pre-main sequence evolution of a 2 solar-mass star
Creators: name: Marques, J. P.
name: Monteiro, M. J. P. F. G.
name: Fernandes, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the effects of convective overshooting in the PMS evolution of intermediate mass stars, by analysing in detail the early evolution towards the main sequence of a 2 M_sun stellar model. These effects can be extremely important in the end of the PMS, when the abundances in CNO elements approach the equilibrium in the centre. We provide a possible physical explanation on why a moderate amount of overshooting produces, as the star approaches the ZAMS, an extra loop in the evolutionary tracks on the HR diagram. An interesting feature is that there is a very well defined amount of overshooting (for a given stellar mass and chemical composition) beyond which a loop is produced. For smaller amounts of overshooting such a loop does not take place and the evolutionary tracks are similar to the ones obtained by Iben (1965). The amount of overshooting needed to produce the loop decreases with stellar mass. We discuss the underlining physical reasons for the behaviour predicted by the evolution models and argue that it provides a crucial observational test for convective overshooting in the core of intermediate mass stars.
description: 10 pages and 7 figures - to appear in MNRAS
Parabolic jet shape on parsec scales in high redshift AGN
Creators: name: Nokhrina, E. E.
name: Pashchenko, I. N.
name: Kutkin, A. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Geometry of relativistic jets in active galaxies provides important information about mechanisms of launching, collimation and acceleration of plasma flow. We propose a new method to probe a boundary shape of a jet on parsec scales -- in the vicinity of its radio core. Apparent speed of an outflow is derived from variability time delays and core shifts measured at the same jet region, providing a self-consistent estimate of the Lorentz factor $Γ$. We link together the distance along the jet $z$ with its transverse size assuming a constant flow acceleration. Our results indicate that jets have parabolic shape and sustain an effective acceleration in the core region, consistent with the Lorentz factor dependency $Γ\propto z^{0.5}$. The proposed method can be applied to the sources observed at small viewing angles as well as to the distant sources when direct measurements are impossible due to a limited angular resolution.
description: 14 pages, 6 figures, accepted by MNRAS
Η έφεση και η αναίρεση στο Ελεγκτικό Συνέδριο
Creators: name: Πάκας, Αθανάσιος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Έφεση
Αναίρεση
Ελεγκτικό Συνέδριο
Appeal
Cassation
Court of Audit

description: Αντικείμενο της παρούσας μεταπτυχιακής διπλωματικής εργασίας είναι η παρουσίαση των κυριότερων ζητημάτων της έφεσης και της αίτησης αναιρέσεως στο Ελεγκτικό Συνέδριο. Στο γενικό μέρος παρατίθεται συνοπτικά η ιστορική εξέλιξη του Ελεγκτικού Συνεδρίου και αναλύεται η νομική φύση του. Αναφέρονται οι θεμελιώδεις δικονομικές αρχές της δικονομίας του Ελεγκτικού Συνεδρίου και οι ιδιαιτερότητές του. Τέλος, παρατίθενται τα βασικά νομοθετήματα της δικονομίας του καθώς και τα νομοθετήματα που καταργήθηκαν. Στο ειδικό μέρος, παρουσιάζεται αφενός, το ένδικο βοήθημα της έφεσης, η αίτηση αναστολής στην έφεση και η προσωρινή διαταγή και αφετέρου το ένδικο μέσο της αίτησης αναίρεσης και η αίτηση αναστολής στην αίτηση αναίρεσης.
description: The subject of this thesis is the presentation of the main issues of the appeal and the cassation to the Court of Audit. The general part summarizes the historical evolution of the Court of Audit and analyzes its legal nature. Reference is made to the fundamental procedural principles of the Court of Audit and its specifications. At last, they are quoted the basic laws of its legal procedures and the laws that have been cancelled. In the specific part, on one hand is presented the legal remedy of appeal, the suspension request in the appeal and the temporary order and, on the other hand, the cassation and the suspension request in the cassation.
Signal identification with Kalman Filter towards background-free neutrinoless double beta decay searches in gaseous detectors
Creators: name: Li, Tao
name: Wang, Shaobo
name: Chen, Yu
name: Han, Ke
name: Lin, Heng
name: Ni, Kaixiang
name: Wang, Wei
name: Xu, Yiliu
name: Zou, Anni
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Particle tracks and differential energy loss measured in high pressure gaseous detectors can be exploited for event identification in neutrinoless double beta decay~($0νββ$) searches. We develop a new method based on Kalman Filter in a Bayesian formalism (KFB) to reconstruct meandering tracks of MeV-scale electrons. With simulation data, we compare the signal and background discrimination power of the KFB method assuming different detector granularities and energy resolutions. Typical background from $^{232}$Th and $^{238}$U decay chains can be suppressed by another order of magnitude than that in published literatures, approaching the background-free regime. For the proposed PandaX-III experiment, the $0νββ$ search half-life sensitivity at the 90\% confidence level would reach $2.7 \times 10^{26}$~yr with 5-year live time, a factor of 2.7 improvement over the initial design target.
Conformal Portal to Dark Matter
Creators: name: Kaneta, Kunio
name: Ko, Pyungwon
name: Park, Wan-Il
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We propose a new portal coupling to dark matter by taking advantage of the nonminimally coupled portal sector to the Ricci scalar. Such a portal sector conformally induces couplings to the trace of the energy-momentum tensor of matters including highly secluded dark matter particles. The portal coupling is so feeble that dark matter is produced by freeze-in processes of scatterings and/or the decay of the mediator. We consider two concrete realizations of the portal: conformally induced Higgs portal and conformally induced mediator portal. The former case is compatible with the Higgs inflation, while the latter case can be tested by dark matter direct detection experiments.
description: 16 pages, 5 figures, version accepted by PRD
On Sp_4 modularity of Picard--Fuchs differential equations for Calabi--Yau threefolds (with an appendix by Vicentiu Pasol)
Creators: name: Yang, Yifan
name: Zudilin, Wadim
Publisher: name: arXiv
Year: 2008
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F46, 14J32 (Primary), 11F23, 20H10, 30F35, 32Q25, 32S40, 34M35 (Secondary)

description: Motivated by the relationship of classical modular functions and Picard--Fuchs linear differential equations of order 2 and 3, we present an analogous concept for equations of order 4 and 5.
description: 33 pages
Bounds on the mass and abundance of dark compact objects and black holes in dwarf spheroidal galaxy halos
Creators: name: Sanchez-Salcedo, F. J.
name: Lora, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We establish new dynamical constraints on the mass and abundance of compact objects in the halo of dwarf spheroidal galaxies. In order to preserve kinematically cold the second peak of the Ursa Minor dwarf spheroidal (UMi dSph) against gravitational scattering, we place upper limits on the density of compact objects as a function of their assumed mass. The mass of the dark matter constituents cannot be larger than 1000 solar masses at a halo density in UMi's core of 0.35 solar masses/pc^3. This constraint rules out a scenario in which dark halo cores are formed by two-body relaxation processes. Our bounds on the fraction of dark matter in compact objects with masses >3000 solar masses improve those based on dynamical arguments in the Galactic halo. In particular, objects with masses $\sim 10^{5}$ solar masses can comprise no more than a halo mass fraction $\sim 0.01$. Better determinations of the velocity dispersion of old overdense regions in dSphs may result in more stringent constraints on the mass of halo objects. For illustration, if the preliminary value of 0.5 km/s for the secondary peak of UMi is confirmed, compact objects with masses above $\sim 100$ solar masses could be excluded from comprising all its dark matter halo.
description: 6 pages, 2 figures, accepted for publication in ApJ Letters
Neuerscheinungen
Creators: name: IZGOnZeit, Redaktion
Publisher: name: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG)
Year: 2015

description: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG), IFFOnZeit Nr. 4 (2015)
Verschiedenes
Creators: name: IZGOnZeit, Redaktion
Publisher: name: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG)
Year: 2015

description: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG), IFFOnZeit Nr. 4 (2015)
Η αγωγιμότητα του δέρματος ως πιθανός προγνωστικός δείκτης ατοπικού δέρματος στον παιδιατρικό πληθυσμό
Creators: name: Μαρκογιαννάκης, Παναγιώτης Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Έφεση
Αναίρεση
Ελεγκτικό Συνέδριο
Appeal
Cassation
Court of Audit

description: Η παρούσα εργασία αποτελεί μία προσπάθεια συσχέτισης της ατοπίας του δέρματος σε παιδιά με την αγωγιμότητα του δέρματος. Η μελέτη της βιβλιογραφίας της επιδημιολογίας και της κλινικής εικόνας της ατοπικής δερματίτιδας σε συνδυασμό με την διερεύνηση των μετρήσεων της ηλεκτρικής αγωγιμότητας του δέρματος του δείγματος 27 παιδιών με την κατάλληλη συσκευή, αποτελούν τον βασικό κορμό της έρευνας μας. Η στατιστικά σημαντική διαφορά μεταξύ των τιμών αγωγιμότητας των υγιών και ασθενών παιδιών κάνει τον ισχυρισμό μας έντονα αληθή. Οι τιμές μέτρησης της αγωγιμότητας του δέρματος των παιδιών με ατοπική δερματίτιδα ήταν υψηλότερες έναντι των υγιών. Συνεκδοχικά, τα αποτελέσματα οδηγούν στο συμπέρασμα πως η μέτρηση της αγωγιμότητας του δέρματος μπορεί να αποτελέσει προγνωστικό δείκτη ατοπικού δέρματος σε παιδιατρικό πληθυσμό.
description: This study is an attempt to correlate skin atopy in children with skin conductivity. The study of the bibliography of epidemiology and the clinical picture of atopic dermatitis combined with the investigation of the measurements of the skin's electrical conductivity in the sample of 27 children with the appropriate device constitute the main body of our research. The statistically significant difference between the conduction values of healthy and sick children makes our claim strongly true. The skin conductivity measurement values of children with atopic dermatitis were higher than the healthy ones. Concomitantly, the results lead to the conclusion that measuring skin conductivity could perhaps be a predictive indicator of atopic skin in a pediatric population.
Editorial
Creators: name: Wrede, Birgitta
Publisher: name: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG)
Year: 2016

description: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG), IFFOnZeit Nr. 5 (2016)
Phase diagram of the spin-1/2 Yukawa-SYK model: Non-Fermi liquid, insulator, and superconductor
Creators: name: Wang, Wei
name: Davis, Andrew
name: Pan, Gaopei
name: Wang, Yuxuan
name: Meng, Zi Yang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We analyze the phase diagram of the Yukawa-Sachdev-Ye-Kitaev model, which describes complex fermions randomly interacting with real bosons via a Yukawa coupling, at finite temperatures and varying fermion density. In a recent work [Phys. Rev. Research 2, 033084 (2020)] it has been shown that, upon varying filling or chemical potential, there exists a first-order quantum phase transition between a non-Fermi liquid (nFL) phase and an insulating phase. Here we show that in such a model with time-reversal symmetry this quantum phase transition is preempted by a pairing phase that develops as a low-temperature instability. As a remnant of the would-be nFL-insulator transition, the superconducting critical temperature rapidly decreases beyond a certain chemical potential. On the other hand, depending on parameters the first-order quantum phase transition extend to finite-temperatures and terminate at a thermal critical point, beyond which the nFL and the insulator become the same phase, similar to that of the liquid-gas and metal-insulator transition in real materials. We determine the pairing phase boundary and the location of the thermal critical point via combined analytic and quantum Monte Carlo numeric efforts. Our results provide the model realization of the transition of nFL's towards superconductivity and insulating states, therefore offer a controlled platform for future investigations of the generic phase diagram that hosts nFL, insulator and superconductor and their phase transitions.
description: 9 pages, 6 figures
The FP420 R&D Project at the LHC
Creators: name: Cox, B. E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A brief review of the FP420 R&D project at the LHC is presented
description: Talk givien at DIS2006, Tsukuba, Japan, 20th - 24th April 2006
RUSSIAN LANGUAGE AS TOOL IN FOREIGN POLICY IN CIS
Creators: name: Khan Shoaib
Publisher: name: Постсоветские исследования
Year: 2021
Subjects: РОССИЯ
СНГ
БАЛТИЯ
ЦЕНТРАЛЬНАЯ АЗИЯ
ЯЗЫК
СССР
ЕВРОПА
RUSSIA
CIS
BALTICS
CENTRAL ASIA
LANGUAGE
SOVIET UNION
EUROPE

description: The development of political, economic and cultural relations with the CIS countries is the priority direction of the foreign policy of the Russian Federation. Cultural policy in relation to the CIS countries is the so-called "soft power", which helps to establish a constructive dialogue between countries. Language plays a special role in cultural policy. The Russian language is an instrument of interethnic communication, an integral part of world culture. Language reflects the thinking of the people, their values and worldview. For this purpose, federal target programs "Russian language" are being created. One of the objectives of the program is to support the Russian language as the basis for the development of integration processes in the member states of the Commonwealth of Independent States. In the Foreign Policy Concept of the Russian Federation, one of the stated goals is to spread and strengthen the position of the Russian language in the world. In the field of international humanitarian cooperation and human rights, one of the tasks of foreign policy is to promote the study and dissemination of the Russian language as an integral part of the world culture and an instrument of international and interethnic communication. The development of the Russian language also presupposes purposeful efforts to promote it in the world, to support and expand the Russian-speaking communities in foreign countries, to increase interest in the Russian language and Russian culture in all countries of the world. First of all, in the countries of the CIS and constituting the so-called post-Soviet space. In this article, the author analyzes the role of the Russian language in the CIS space, taking into account the indicated processes and designated tasks. The work uses the methodology of political analysis, structural linguistics and the method of comparative studies.
THE UKRAINIAN EXPERIENCE OF USING PRIVATE MILITARY CAMPAIGNS
Creators: name: Kurylev Konstantin
name: Ivkina Natalia
Publisher: name: Постсоветские исследования
Year: 2021
Subjects: УКРАИНА
ЧВК
ДОНБАСС
БОЕВЫЕ ДЕЙСТВИЯ
ПОЛИТИКА
THE UKRAINE
PMCS
DONBASS
HOSTILITIES
POLITICS

description: Since early XXI century the number of private military companies in the world has grown to five hundred. The global market turnover in this industry has reached hundreds of billions of dollars. The popularity of mercenaries again became comparable to the times when they decided the outcome of entire military campaigns, as it was during the Middle Ages. Private military companies are non-governmental commercial organizations authorized by the state (or other customer) to solve military problems. Their field of activity is the protection, escort of people and cargo in the conditions of hostilities, and often participation in hostilities. PMCs can also provide consulting services and training. Sometimes, by mistake, any paramilitary entity is called a private military company. The main difference between PMCs and, for example, volunteer battalions (which operated en masse in Ukraine during the acute phase of the conflict in Donbass in 2014-2015) is that the purpose of the former is to extract commercial benefits. While volunteering, in theory, does not provide for the receipt of material benefits. At the same time, individual beneficiaries or their members receive illegal income, but they are associated, rather, with looting, racketeering or raiding, and not with classical mercenary activities. Within the framework of this study, the author reveals the key differences between PMCs and volunteer battalions, identifies fundamental differences in the methodology of their application and analyzes the effectiveness of their work during the acute phase of the conflict. The work uses the methodology of historical and political sciences - the historical-analytical method, the method of political analysis and the structural method.
The SCUBA HAlf Degree Extragalactic Survey (SHADES) - IV: Radio-mm-FIR photometric redshifts
Creators: name: Aretxaga, Itziar
name: Hughes, David H.
name: Coppin, Kristen
name: Mortier, Angela M. J.
name: Wagg, Jeff
name: Dunlop, James S.
name: Chapin, Edward L.
name: Eales, Stephen A.
name: Gaztanaga, Enrique
name: Halpern, Mark
name: Ivison, Rob J.
name: van Kampen, Eelco
name: Scott, Douglas
name: Serjeant, Stephen
name: Smail, Ian
name: Babbedge, Thomas
name: Benson, Andrew J.
name: Chapman, Scott
name: Clements, David L.
name: Dunne, Loretta
name: Dye, Simon
name: Farrah, Duncan
name: Jarvis, Matthew J.
name: Mann, Robert G.
name: Pope, Alexandra
name: Priddey, Robert
name: Rawlings, Steve
name: Seigar, Marc
name: Silva, Laura
name: Simpson, Chris
name: Vaccari, Mattia
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the redshift distribution of the SHADES galaxy population based on the rest-frame radio-mm-FIR colours of 120 robustly detected 850um sources in the Lockman Hole East (LH) and Subaru XMM-Newton Deep Field (SXDF). The redshift distribution derived from the full SED information is shown to be narrower than that determined from the radio-submm spectral index, as more photometric bands contribute to a higher redshift accuracy. The redshift distribution of sources derived from at least two photometric bands peaks at z ~ 2.4 and has a near-Gaussian distribution, with 50 per cent (interquartile range) of sources at z=1.8-3.1. We find a statistically-significant difference between the measured redshift distributions in the two fields; the SXDF peaking at a slightly lower redshift (median z ~ 2.2) than the LH (median z ~ 2.7), which we attribute to the noise-properties of the radio observations. We demonstrate however that there could also be field-to-field variations that are consistent with the measured differences in the redshift distributions, and hence, that the incomplete area observed by SHADES with SCUBA, despite being the largest sub-mm survey to date, may still be too small to fully characterize the bright sub-mm galaxy population. Finally we present a brief comparison with the predicted, or assumed, redshift distributions of sub-mm galaxy formation and evolution models, and we derive the contribution of these SHADES sources and the general sub-mm galaxy population to the star formation-rate density at different epochs.
description: MNRAS, accepted (22 pages, 9 figures, 5 tables). Revised version, minor modifications and 2 extra figures
[Frases em mỹky, relato de viagem]
Creators: name: Monserrat, Ruth
name: Rondon Amarante, Elizabeth
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: irn

description: 2 arquivos WAV. Lado A: gravação "de material sintático transcrito em agosto 81 por Ruth Monserrat." Lado B: viagem (61 segundos). Data de gravação escrita em fita de novembro de 1981. Cada frase repetida por ambos os falantes. Digitalizado pelo Berkeley Language Center.
Universal gauge-invariant cellular automata
Creators: name: Arrighi, Pablo
name: Costes, Marin
name: Eon, Nathanaël
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Gauge symmetries play a fundamental role in Physics, as they provide a mathematical justification for the fundamental forces. Usually, one starts from a non-interactive theory which governs `matter', and features a global symmetry. One then extends the theory so as make the global symmetry into a local one (a.k.a gauge-invariance). We formalise a discrete counterpart of this process, known as gauge extension, within the Computer Science framework of Cellular Automata (CA). We prove that the CA which admit a relative gauge extension are exactly the globally symmetric ones (a.k.a the colour-blind). We prove that any CA admits a non-relative gauge extension. Both constructions yield universal gauge-invariant CA, but the latter allows for a first example where the gauge extension mediates interactions within the initial CA.
Resonant Nonlinear Hall Effect in Two-Dimensional Electron Systems
Creators: name: Huang, Botsz
name: Moghaddam, Ali G.
name: Facio, Jorge I.
name: Chang, Ching-Hao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the Hall conductivity of a two-dimensional electron gas under an inhomogeneous magnetic field $B(x)$. First, we prove using the quantum kinetic theory that an odd magnetic field can lead to a purely nonlinear Hall response. Second, considering a real-space magnetic dipole consisting of a sign-changing magnetic field and based on numerical semiclassical dynamics, we unveil a parametric resonance involving the cyclotron ratio and a characteristic width of $B(x)$, which can greatly enhance the Hall response. Different from previous mechanisms that rely on the bulk Berry curvature dipole, here, the effect largely stems from boundary states associated with the real-space magnetic dipole. Our findings pave a new way to engineer current rectification and higher harmonic generation in two-dimensional materials having or not crystal inversion symmetry.
description: 10 pages, 4 figures
Electronic localization in small-angle twisted bilayer graphene
Creators: name: Nguyen, V. Hung
name: Paszko, D.
name: Lamparski, M.
name: Van Troeye, B.
name: Meunier, V.
name: Charlier, J. -C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Close to a magical angle, twisted bilayer graphene (TBLG) systems exhibit isolated flat electronic bands and, accordingly, strong electron localization. TBLGs have hence been ideal platforms to explore superconductivity, correlated insulating states, magnetism, and quantized anomalous Hall states in reduced dimension. Below a threshold twist angle ($\sim$ $1.1^\circ$), the TBLG superlattice undergoes lattice reconstruction, leading to a periodic moiré structure which presents a marked atomic corrugation. Using a tight-binding framework, this research demonstrates that superlattice reconstruction affects significantly the electronic structure of small-angle TBLGs. The first magic angle at $\sim$ $1.1^\circ$ is found to be a critical case presenting globally maximized electron localization, thus separating reconstructed TBLGs into two classes with clearly distinct electronic properties. While low-energy Dirac fermions are still preserved at large twist angles $> 1.1 ^\circ$, small-angle ($\lesssim 1.1^\circ$) TBLG systems present common features such as large spatial variation and strong electron localization observed in unfavorable AA stacking regions. However, for small twist angles below $1.1 ^\circ$, the relative contribution of the local AA regions is progressively reduced, thus precluding the emergence of further magic angles, in very good agreement with existing experimental evidence.
description: 8 pages, 5 figures, 1 SI document, revised for publication
One-particle dynamical correlations in the one-dimensional Bose gas
Creators: name: Caux, Jean-Sebastien
name: Calabrese, Pasquale
name: Slavnov, Nikita A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The momentum- and frequency-dependent one-body correlation function of the one-dimensional interacting Bose gas (Lieb-Liniger model) in the repulsive regime is studied using the Algebraic Bethe Ansatz and numerics. We first provide a determinant representation for the field form factor which is well-adapted to numerical evaluation. The correlation function is then reconstructed to high accuracy for systems with finite but large numbers of particles, for a wide range of values of the interaction parameter. Our results are extensively discussed, in particular their specialization to the static case.
description: 19 Pages, 7 figures
Reducing orbital eccentricity in binary black hole simulations
Creators: name: Pfeiffer, Harald P.
name: Brown, Duncan A.
name: Kidder, Lawrence E.
name: Lindblom, Lee
name: Lovelace, Geoffrey
name: Scheel, Mark A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Binary black hole simulations starting from quasi-circular (i.e., zero radial velocity) initial data have orbits with small but non-zero orbital eccentricities. In this paper the quasi-equilibrium initial-data method is extended to allow non-zero radial velocities to be specified in binary black hole initial data. New low-eccentricity initial data are obtained by adjusting the orbital frequency and radial velocities to minimize the orbital eccentricity, and the resulting ($\sim 5$ orbit) evolutions are compared with those of quasi-circular initial data. Evolutions of the quasi-circular data clearly show eccentric orbits, with eccentricity that decays over time. The precise decay rate depends on the definition of eccentricity; if defined in terms of variations in the orbital frequency, the decay rate agrees well with the prediction of Peters (1964). The gravitational waveforms, which contain $\sim 8$ cycles in the dominant l=m=2 mode, are largely unaffected by the eccentricity of the quasi-circular initial data. The overlap between the dominant mode in the quasi-circular evolution and the same mode in the low-eccentricity evolution is about 0.99.
description: 27 pages, 9 figures; various minor clarifications; accepted to the "New Frontiers" special issue of CQG
Η αστική και ποινική ευθύνη διοικούντων προσωπικών και κεφαλαιουχικών εταιρειών για φορολογικές οφειλές και φορολογικές παραβάσεις στο όνομα του νομικού προσώπου
Creators: name: Καρακώστα, Σεβαστή – Μαρία Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Αστική ευθύνη
Ποινική ευθύνη
Διοικούντες προσωπικών και κεφαλαιουχικών εταιρειών
Civil liability
Legal liability
Representatives of personal and corporate companies

description: Η παρούσα μελέτη έχει ως αντικείμενό της την αστική και ποινική ευθύνη των διοικούντων νομικών προσώπων, ιδίως των προσωπικών και κεφαλαιουχικών εταιρειών, για τις οφειλές και τις φορολογικές παραβάσεις αυτών έναντι του Δημοσίου. Στο πεδίο της αστικής ευθύνης των νομίμων εκπροσώπων των ως άνω εταιρικών τύπων, σκοπός της οικείας διπλωματικής εργασίας είναι να προβεί σε μια σύγκριση μεταξύ των νομοθετικών ρυθμίσεων του Ν. 2238/1994 κι εκείνων που εισήγαγε Ν. 4174/2013, ως προς το υποκείμενο και το αντικείμενο της φορολογικής υποχρέωσης. Περαιτέρω, ως προς την ποινική ευθύνη των διοικούντων εταιριών, η σύγκριση που επιχειρείται αφορά στις ρυθμίσεις του Ν. 2523/1997 κι εκείνες του Ν. 4174/2013, ως προς τα τυποποιούμενα εγκλήματα φοροδιαφυγής, το υποκείμενο της ποινικής ευθύνης και την βαρύτητα της απειλούμενης ποινής. Η ανωτέρω έρευνα εξετάζει απόψεις της θεωρίας και νομολογίας επί του προϊσχύοντος νομοθετικού καθεστώτος αλλά και τις θέσεις που αυτές διαμόρφωσαν και εξακολουθούν μέχρι σήμερα να διαμορφώνουν υπό το ισχύουσες πλέον νομοθετικές διατάξεις.
description: This study has as its object the civil and criminal liability of the directors of legal persons, especially of the personal and capital companies, for their debts and tax violations against the State. In the field of civil liability of the legal representatives of the aforementioned corporate formations, the aim of the diplomatic work is to make a comparison between the legislation of Law 2238/1994 and those who introduced Law 4174/2013, as regards the subject and the object of the tax liability. Furthermore, as regards the criminal liability of the management companies, the comparison attempted concerns the provisions of Law 2523/1997 and those of Law 4174/2013, as regards standardized tax evasion crimes, the subject of criminal liability and the gravity of the threatened penalty. This research examines views of theory and jurisprudence on the preexisting legislative regime and the positions they have shaped and continue to shape under the current legislative provisions.
Geometric Hamilton-Jacobi Theory
Creators: name: Carinena, J. F.
name: Gracia, X.
name: Marmo, G.
name: Martinez, E.
name: Munoz-Lecanda, M.
name: Roman-Roy, N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 70H20, 70G45, 70H45, 70H03, 70H05

description: The Hamilton-Jacobi problem is revisited bearing in mind the consequences arising from a possible bi-Hamiltonian structure. The problem is formulated on the tangent bundle for Lagrangian systems in order to avoid the bias of the existence of a natural symplectic structure on the cotangent bundle. First it is developed for systems described by regular Lagrangians and then extended to systems described by singular Lagrangians with no secondary constraints. We also consider the example of the free relativistic particle, the rigid body and the electron-monopole system.
description: 40 pages
[Vocabulário básico em mỹky, frases em munduruku]
Creators: name: Mỹky, Atusi
name: Mỹky, Kamunu
name: Mỹky, Yurusi
name: Monserrat, Ruth
name: Rondon Amarante, Elizabeth
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: irn
subject: myu

description: 2 arquivos WAV. Lado B, 23:07: "últimas frases do voc padrão (lá pelo final)." A data e os nomes dos falantes referem-se apenas às gravações em mỹky. Digitalizado pelo Berkeley Language Center.
Fractal fits to Riemann zeros
Creators: name: Slater, Paul B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 11M26; 28A20; 81Q05

description: Wu and Sprung (Phys. Rev. E 48, 2595 (1993)) reproduced the first 500 nontrivial Riemann zeros, using a one-dimensional local potential model. They concluded -- and similarly van Zyl and Hutchinson (Phys. Rev. E 67, 066211 (2003)) -- that the potential possesses a fractal structure of dimension d=3/2. We model the nonsmooth fluctuating part of the potential by the alternating-sign sine series fractal of Berry and Lewis A(x,g). Setting d=3/2, we estimate the frequency parameter (gamma), plus an overall scaling parameter (sigma) we introduce. We search for that pair of parameters (gamma,sigma) which minimizes the least-squares fit S_{n}(gamma,sigma) of the lowest n eigenvalues -- obtained by solving the one-dimensional stationary (non-fractal) Schrodinger equation with the trial potential (smooth plus nonsmooth parts) -- to the lowest n Riemann zeros for n =25. For the additional cases we study, n=50 and 75, we simply set sigma=1. The fits obtained are compared to those gotten by using just the smooth part of the Wu-Sprung potential without any fractal supplementation. Some limited improvement -- 5.7261 vs. 6.39207 (n=25), 11.2672 vs. 11.7002 (n=50) and 16.3119 vs. 16.6809 (n=75) -- is found in our (non-optimized, computationally-bound) search procedures. The improvements are relatively strong in the vicinities of gamma=3 and (its square) 9. Further, we extend the Wu-Sprung semiclassical framework to include higher-order corrections from the Riemann-von Mangoldt formula (beyond the leading, dominant term) into the smooth potential.
description: 19 pages, 19 figures, minor additions, accepted by Canad. J. Phys
Particle dynamics governed by radiation losses in extreme-field current sheets
Creators: name: Muraviev, A.
name: Bashinov, A.
name: Efimenko, E.
name: Gonoskov, A.
name: Meyerov, I.
name: Sergeev, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Particles moving in current sheets under extreme conditions, such as those in the vicinity of pulsars or those predicted on upcoming multipetawatt laser facilities, may be subject to significant radiation losses. We present an analysis of particle motion in fields of a relativistic neutral electron-positron current sheet in the case when radiative effects must be accounted for. In the Landau-Lifshitz radiation reaction force model, when quantum effects are negligible, an analytical solution for particle trajectories is derived. Based on this solution, for the case when quantum effects are significant an averaged quantum solution in the semiclassical approach is obtained. The applicability region of the solutions is determined and analytical trajectories are found to be in good agreement with those of numerical simulations with account for radiative effects. Based on these results we gain new insights into current sheet phenomena expected on upcoming laser facilities.
Coexistence of coarsening and mean field relaxation in the long-range Ising chain
Creators: name: Corberi, Federico
name: Iannone, Alessandro
name: Kumar, Manoj
name: Lippiello, Eugenio
name: Politi, Paolo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the kinetics after a low temperature quench of the one-dimensional Ising model with long range interactions between spins at distance $r$ decaying as $r^{-α}$. For $α=0$, i.e. mean field, all spins evolve coherently quickly driving the system towards a magnetised state. In the weak long range regime with $α>1$ there is a coarsening behaviour with competing domains of opposite sign without development of magnetisation. For strong long range, i.e. $0
description: 11 pages, 3 figures
S-Z Power Spectra
Creators: name: Rephaeli, Yoel
name: Sadeh, Sharon
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There is some observational evidence for earlier evolution of clusters of galaxies than predicted in the standard LambdaCDM model with a Gaussian primordial density fluctuation field, and a low value for the mass variance parameter sigma_8. Particularly difficult in this model is the interpretation of possible excess CMB anisotropy on cluster scales as due to the Sunyaev-Zeldovich (S-Z) effect. We have calculated S-Z power spectra in the standard model, and in two alternative models which predict higher cluster abundance - a model with non-Gaussian PDF, and an early dark energy model. As anticipated, the levels of S-Z power in the latter two models are significantly higher than in the standard model, and in good agreement with current measurements of CMB anisotropy at high multipole values. Our results provide a sufficient basis for testing the viability of the three models by futur high quality measurements of cluster abundance and the anisotropy induced by the S-Z effect.
description: 8 pages, 2 figures, proceedings of CosPA07
Οι Παιδικοί Χαρακτήρες στο Παιδικό μυθιστόρημα 19ου και 20ου αιώνα: Αναζητώντας τα Χαρακτηριστικά τους γνωρίσματα
Creators: name: Λίτσα, Μαρία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Μυθιστόρημα 19ου και 20ου
Παιδί-Ήρωας
19th and 20th century novel
Child-Hero

description: Σκοπός της παρούσας μεταπτυχιακής διπλωματικής εργασίας είναι μέσα από πραγματολογική και κυρίως ιδεολογική προσέγγιση να αναδειχθεί μέσα από μυθιστορήματα του 19ου και του 20ου αιώνα, το πρόσωπο/μοντέλο του μυθιστορηματικού ήρωα. Η εν λόγω ιδεολογική προσέγγιση επιτρέπει να απομονώσουμε τα γνωρίσματα της προσωπικότητας του μυθιστορηματικού ήρωα και την ηθική και κοινωνική του υπόσταση, τη στάση του απέναντι σε προβλήματα, αξίες και θεσμούς, χωρίς την πρόθεση φιλολογικής ανάλυσης και αισθητικής προσέγγισης των έργων
description: The aim of the present thesis is to feature the model of the hero in the novel of 19th and 20th century, following a pragmatistic and mainly an ideological approach. This approach will allow to isolate particular traits of the characters, their moral and social status and their attitude towards institutions, values, without any reference to the aesthetic value of the works
Feedback cooling of a cantilever's fundamental mode below 5 mK
Creators: name: Poggio, M.
name: Degen, C. L.
name: Mamin, H. J.
name: Rugar, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We cool the fundamental mechanical mode of an ultrasoft silicon cantilever from a base temperature of 2.2 K to 2.9 +/- 0.3 mK using active optomechanical feedback. The lowest observed mode temperature is consistent with limits determined by the properties of the cantilever and by the measurement noise. For high feedback gain, the driven cantilever motion is found to suppress or "squash" the optical interferometer intensity noise below the shot noise level.
description: 4 pages, 6 figures