cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Gravitational Dynamics of an Infinite Shuffled Lattice of Particles
Creators: name: Baertschiger, Thierry
name: Joyce, Michael
name: Gabrielli, Andrea
name: Labini, Francesco Sylos
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study, using numerical simulations, the dynamical evolution of self-gravitating point particles in static euclidean space, starting from a simple class of infinite ``shuffled lattice'' initial conditions. These are obtained by applying independently to each particle on an infinite perfect lattice a small random displacement, and are characterized by a power spectrum (structure factor) of density fluctuations which is quadratic in the wave number k, at small k. For a specified form of the probability distribution function of the ``shuffling'' applied to each particle, and zero initial velocities, these initial configurations are characterized by a single relevant parameter: the variance $δ^2$ of the ``shuffling'' normalized in units of the lattice spacing $\ell$. The clustering, which develops in time starting from scales around $\ell$, is qualitatively very similar to that seen in cosmological simulations, which begin from lattices with applied correlated displacements and incorporate an expanding spatial background. From very soon after the formation of the first non-linear structures, a spatio-temporal scaling relation describes well the evolution of the two-point correlations. At larger times the dynamics of these correlations converges to what is termed ``self-similar'' evolution in cosmology, in which the time dependence in the scaling relation is specified entirely by that of the linearized fluid theory. Comparing simulations with different $δ$, different resolution, but identical large scale fluctuations, we are able to identify and study features of the dynamics of the system in the transient phase leading to this behavior. In this phase, the discrete nature of the system explicitly plays an essential role.
description: 21 pages, 16 figures, final version to match one to appear in Phys. Rev. E, minor changes to introduction and improvement of some figures
Black-hole microstate spectroscopy: ringdown, quasinormal modes, and echoes
Creators: name: Ikeda, Taishi
name: Bianchi, Massimo
name: Consoli, Dario
name: Grillo, Alfredo
name: Morales, Josè Francisco
name: Pani, Paolo
name: Raposo, Guilherme
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Deep conceptual problems associated with classical black holes can be addressed in string theory by the ``fuzzball'' paradigm, which provides a microscopic description of a black hole in terms of a thermodynamically large number of regular, horizonless, geometries with much less symmetry than the corresponding black hole. Motivated by the tantalizing possibility to observe quantum gravity signatures near astrophysical compact objects in this scenario, we perform the first $3+1$ numerical simulations of a scalar field propagating on a large class of multicenter geometries with no spatial isometries arising from ${\cal N}=2$ four-dimensional supergravity. We identify the prompt response to the perturbation and the ringdown modes associated with the photon sphere, which are similar to the black-hole case, and the appearance of echoes at later time, which is a smoking gun of some structure at the horizon scale and of the regular interior of these solutions. The response is in agreement with an analytical model based on geodesic motion in these complicated geometries. Our results provide the first numerical evidence for the dynamical linear stability of fuzzballs, and pave the way for an accurate discrimination between fuzzballs and black holes using gravitational-wave spectroscopy.
description: Published version, 22 pages, 10 figures, Movies are available in https://web.uniroma1.it/gmunu/fuzzballs-multipole-moments-and-ringdown
Designing high-performance propagation-compressing spaceplates using thin-film multilayer stacks
Creators: name: Page, Jordan T. R.
name: Reshef, Orad
name: Boyd, Robert W.
name: Lundeen, Jeff S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The development of metasurfaces has enabled unprecedented portability and functionality in flat optical devices. Spaceplates have recently been introduced as a complementary element to reduce the space between individual metalenses. This will further miniaturize entire imaging devices. However, a spaceplate necessitates a non-local optical response -- one which depends on the transverse spatial frequency component of a light field -- therefore making it challenging both to design them and to assess their ultimate performance and potential. Here, we employ inverse-design techniques to explore the behaviour of general thin-film-based spaceplates. We observe a tradeoff between the compression factor R and the numerical aperture NA of such devices; we obtained a compression factor of R = 5.5 for devices with an NA = 0.42 up to a record R = 340 with NA of 0.017. Our work illustrates that even simple designs consisting of realistic materials (i.e., silicon and glass) permit capable spaceplates for monochromatic applications.
description: 8 pages, 4 figures
Scale-free random branching tree in supercritical phase
Creators: name: Lee, D. -S.
name: Kim, J. S.
name: Kahng, B.
name: Kim, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the size and the lifetime distributions of scale-free random branching tree in which $k$ branches are generated from a node at each time step with probability $q_k\sim k^{-γ}$. In particular, we focus on finite-size trees in a supercritical phase, where the mean branching number $C=\sum_k k q_k$ is larger than 1. The tree-size distribution $p(s)$ exhibits a crossover behavior when $2 < γ< 3$; A characteristic tree size $s_c$ exists such that for $s \ll s_c$, $p(s)\sim s^{-γ/(γ-1)}$ and for $s \gg s_c$, $p(s)\sim s^{-3/2}\exp(-s/s_c)$, where $s_c$ scales as $\sim (C-1)^{-(γ-1)/(γ-2)}$. For $γ> 3$, it follows the conventional mean-field solution, $p(s)\sim s^{-3/2}\exp(-s/s_c)$ with $s_c\sim (C-1)^{-2}$. The lifetime distribution is also derived. It behaves as $\ell(t)\sim t^{-(γ-1)/(γ-2)}$ for $2 < γ< 3$, and $\sim t^{-2}$ for $γ> 3$ when branching step $t \ll t_c \sim (C-1)^{-1}$, and $\ell(t)\sim \exp(-t/t_c)$ for all $γ> 2$ when $t \gg t_c$. The analytic solutions are corroborated by numerical results.
description: 6 pages, 6 figures
Η χρήση του Ψαλτηρίου κατά τον Άγιο Αρσένιο τον Καππαδόκη
Creators: name: Τραντάλης Προκόπιος Χρήστος Ευστρατίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Αρσένιος ο Καππαδόκης
Παΐσιος ο Αγιορείτης
Ψαλτήριον
Arsenios the Cappadocian
Paisios the Athonite
Psaltirion

description: Σκοπός της μεταπτυχιακής εργασίας ήταν η μελέτη της χρήσης του Ψαλτηρίου κατά τον Άγιο Αρσένιο τον Καππαδόκη. Ο Άγιος Αρσένιος είχε ορίσει για κάθε Ψαλμό μία ευχολογική χρήση. Στο πρώτο κεφάλαιο πραγματοποιείται μία προσέγγιση και παρουσίαση του Αγίου, μέσα από τον βίο, την προσωπικότητα και την εποχή του, αντλώντας πληροφορίες κυρίως από το βιογραφικό έργο του Αγίου Παϊσίου του Αγιορείτου. Παρουσιάζονται παράλληλα λόγοι του Αγίου Παϊσίου για τον Άγιο Αρσένιο και το Ψαλτήριο. Στο δεύτερο κεφάλαιο, η μελέτη των προηγουμένων παραδόσεων χρήσεως του Ψαλτηρίου, κατά την κοινή και κελλιώτικη προσευχή, οδηγούν σε μία ομαλή μετάβαση στο τρίτο κεφάλαιο, όπου παρουσιάζεται η μοναδικότητα της περιπτώσεως του Αγίου Αρσενίου, της χρήσεως αυτουσίου του Ψαλμικού κειμένου ως ευχών. Στο τέλος, παρατίθενται οι χρήσεις των Ψαλμών κατά σειράν, καθώς και ο τρόπος που μπορεί ο πιστός να χρησιμοποιήσει αυτόν τον τρόπο προσευχής, όπως μας παραδίδετε μέσω του Αγίου Παϊσίου
description: The aim of the present thesis was the study of the usage of Psaltirion according to Saint Arsenios the Cappadocian. St Arsenios had chosen for every Psalm one euchological(praying) usage. In the first chapter a presentation and view of the Saint is performed, through his life, his personality and his era, collecting information mainly from the biographical work of Saint Paisios the Athonite. In the same chapter are presented sermons of St Paisios about St Arsenios and the Psaltirion. In the second chapter, the study of the previous traditions on the usage of the Psaltirion, during the common and the kelliotiki(in the monk’s cell) prayer, leads to a smooth entrance to the third chapter, in which is presented, the unique case of St Arsenios’ usage of the Psalms’ text as blessings. In conclusion, the usages of the Psalms are quoted according to their order, as is also how the faithful can use this way of prayer, as it is given to us by St Paisios
Exact evaluation of density matrix elements for the Heisenberg chain
Creators: name: Sato, Jun
name: Shiroishi, Masahiro
name: Takahashi, Minoru
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have obtained all the density matrix elements on six lattice sites for the spin-1/2 Heisenberg chain via the algebraic method based on the quantum Knizhnik-Zamolodchikov equations. Several interesting correlation functions, such as chiral correlation functions, dimer-dimer correlation functions, etc... have been analytically evaluated. Furthermore we have calculated all the eigenvalues of the density matrix and analyze the eigenvalue-distribution. As a result the exact von Neumann entropy for the reduced density matrix on six lattice sites has been obtained.
description: 33 pages, 4 eps figures, 3 authors
Multi-Channel Speech Enhancement using Graph Neural Networks
Creators: name: Tzirakis, Panagiotis
name: Kumar, Anurag
name: Donley, Jacob
Publisher: name: arXiv
Year: 2021
Subjects: subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Multi-channel speech enhancement aims to extract clean speech from a noisy mixture using signals captured from multiple microphones. Recently proposed methods tackle this problem by incorporating deep neural network models with spatial filtering techniques such as the minimum variance distortionless response (MVDR) beamformer. In this paper, we introduce a different research direction by viewing each audio channel as a node lying in a non-Euclidean space and, specifically, a graph. This formulation allows us to apply graph neural networks (GNN) to find spatial correlations among the different channels (nodes). We utilize graph convolution networks (GCN) by incorporating them in the embedding space of a U-Net architecture. We use LibriSpeech dataset and simulate room acoustics data to extensively experiment with our approach using different array types, and number of microphones. Results indicate the superiority of our approach when compared to prior state-of-the-art method.
A round robin on room acoustical simulation and auralization
Creators: name: Brinkmann, Fabian
name: Aspöck, Lukas
name: Ackermann, David
name: Lepa, Steffen
name: Vorländer, Michael
name: Weinzierl, Stefan
Publisher: name: Technische Universität Berlin
Year: 2019
Subjects: subject: 530 Physik
subject: acoustics
subject: room
subject: auralization
subject: sound perception
subject: simulation

description: A round robin was conducted to evaluate the state of the art of room acoustic modeling software both in the physical and perceptual realms. The test was based on six acoustic scenes highlighting specific acoustic phenomena and for three complex, “real-world” spatial environments. The results demonstrate that most present simulation algorithms generate obvious model errors once the assumptions of geometrical acoustics are no longer met. As a consequence, they are neither able to provide a reliable pattern of early reflections nor do they provide a reliable prediction of room acoustic parameters outside a medium frequency range. In the perceptual domain, the algorithms under test could generate mostly plausible but not authentic auralizations, i.e., the difference between simulated and measured impulse responses of the same scene was always clearly audible. Most relevant for this perceptual difference are deviations in tone color and source position between measurement and simulation, which to a large extent can be traced back to the simplified use of random incidence absorption and scattering coefficients and shortcomings in the simulation of early reflections due to the missing or insufficient modeling of diffraction.
The All-wavelength Extended Groth Strip International Survey (AEGIS) Data Sets
Creators: name: Davis, M.
name: Guhathakurta, P.
name: Konidaris, N.
name: Newman, J. A.
name: Ashby, M. L. N.
name: Biggs, A. D.
name: Barmby, P.
name: Bundy, K.
name: Chapman, S.
name: Coil, A. L.
name: Conselice, C.
name: Cooper, M.
name: Croton, D.
name: Eisenhardt, P.
name: Ellis, R.
name: Faber, S.
name: Fang, T.
name: Fazio, G. G.
name: Georgakakis, A.
name: Gerke, B.
name: Goss, W. M.
name: Gwyn, S.
name: Harker, J.
name: Hopkins, A.
name: Huang, J. -S.
name: Ivison, R. J.
name: Kassin, S. A.
name: Kirby, E.
name: Koekemoer, A.
name: Koo, D. C.
name: Laird, E.
name: Floc'h, E. Le
name: Lin, L.
name: Lotz, J.
name: Marshall, P. J.
name: Martin, D. C.
name: Metevier, A.
name: Moustakas, L. A.
name: Nandra, K.
name: Noeske, K.
name: Papovich, C.
name: Phillips, A. C.
name: Rich, R. M.
name: Rieke, G. H.
name: Rigopoulou, D.
name: Salim, S.
name: Schiminovich, D.
name: Simard, L.
name: Smail, I.
name: Small, T. A.
name: Weiner, B.
name: Willmer, C. N. A.
name: Willner, S. P.
name: Wilson, G.
name: Wright, E.
name: Yan, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this the first of a series of Letters, we present a description of the panchromatic data sets that have been acquired in the Extended Groth Strip region of the sky. Our survey, the All-wavelength Extended Groth strip International Survey (AEGIS), is intended to study the physical properties and evolutionary processes of galaxies at z ~ 1. It includes the following deep, wide-field imaging data sets: Chandra/ACIS X-ray (0.5 - 10 keV), GALEX ultraviolet (1200 - 2500 Angstrom), CFHT/MegaCam Legacy Survey optical (3600 - 9000 Angstroms), CFHT/CFH12K optical (4500 - 9000 Angstroms), Hubble Space Telescope/ACS optical (4400 - 8500 Angstroms), Palomar/WIRC near-infrared (1.2 - 2.2 microns), Spitzer/IRAC mid-infrared (3.6 - 8.0 microns), Spitzer/MIPS far-infrared (24 - 70 microns), and VLA radio continuum (6 - 20 cm). In addition, this region of the sky has been targeted for extensive spectroscopy using the DEIMOS spectrograph on the Keck II 10 m telescope. Our survey is compared to other large multiwavelength surveys in terms of depth and sky coverage.
description: 21 pages, 1 fig; intro letter for AEGIS ApJL special issue; ps & pdf at http://www.ucolick.org/~raja/aegis.ps & http://www.ucolick.org/~raja/aegis.pdf
Riemann zeros from a periodically-driven trapped ion
Creators: name: He, Ran
name: Ai, Ming-Zhong
name: Cui, Jin-Ming
name: Huang, Yun-Feng
name: Han, Yong-Jian
name: Li, Chuan-Feng
name: Guo, Guang-Can
name: Sierra, G.
name: Creffield, C. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The non-trivial zeros of the Riemann zeta function are central objects in number theory. In particular, they enable one to reproduce the prime numbers. They have also attracted the attention of physicists working in Random Matrix Theory and Quantum Chaos for decades. Here we present an experimental observation of the lowest non-trivial Riemann zeros by using a trapped ion qubit in a Paul trap, periodically driven with microwave fields. The waveform of the driving is engineered such that the dynamics of the ion is frozen when the driving parameters coincide with a zero of the real component of the zeta function. Scanning over the driving amplitude thus enables the locations of the Riemann zeros to be measured experimentally to a high degree of accuracy, providing a physical embodiment of these fascinating mathematical objects in the quantum realm.
description: 10 pages, 6 figures
On the efficiency of particle acceleration by rotating magnetospheres in AGN
Creators: name: Osmanov, Zaza
name: Rogava, Andria D.
name: Bodo, Gianluigi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: To investigate the efficiency of centrifugal acceleration of particles as a possible mechanism for the generation of ultra-high $γ$-ray nonthermal emission from TeV blazars, we study the centrifugal acceleration of electrons by rotating magnetic field lines, for an extended range of inclination angles and determine the maximum Lorentz factors $γ_{max}$ attainable by the electrons via this process. {Two principal limiting mechanisms for the particle acceleration, inverse Compton scattering and breakdown of the bead-on-the-wire approximation, are examined. Particles may be centrifugally accelerated up to $γ_{max} \simeq 10^8$ and the main limiting mechanism for the $γ_{max}$ is the inverse Compton scattering. The energy of centrifugally accelerated particles can be amply sufficient for the generation (via inverse Compton scattering) of the ultra-high energy (up to $20TeV$) gamma emission in TeV blazars.
description: 7 pages 5 figures
Semantic elicitation: Epistemic indefinites and modality
Creators: name: Kipkoech, Linus
name: Bossi, Madeline
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: sgc

description: One .mp4 file and one .pdf file. Elicitation of Binder Roof Constraint constructions with epistemic indefinites. Elicitation of modal force flexibility under negation.
Aspects of organometallic chromium nitrosyl chemistry
Creators: name: Shaw, Michael J.
Publisher: name: University of British Columbia
Year: 2008

description: The behavior of a series of paramagnetic organometallic complexes, CpCr(N0)(L)X, (Cp = 175-05H5; L = phosphine or amine; X = Cl or I) in solutions has been investigated by ESR spectrometry and cyclic voltammetry. The 17-valence electron CpCr(N0)(L)X compounds undergo ligand substitution in donor solvents, S, forming either CpCr(N0)(S)I or [CpCr(N0)(L)(S)]I complexes, depending on the conditions used. The CpCr(N0)(L)X complexes display irreversible reduction behavior in THF/0.1M En-Bu4NFF6. The complexes are moderately difficult to reduce. Interestingly, the reduced species are more substitutionally labile than their odd-electron precursors, in contrast to the usual observed trend where even-electron species are less labile. The kinetics of the substitution of THF for PPh3 on the CpCr(N0)(THF)(I) complex have been investigated by using UV-V is spectroscopy. The unusual 17-valence electron alkyl complexes CpCr(N0)(L)R (R = CH2SiMe3,CH2Ph) have been prepared and studied. Some of these complexes display unprecedented delocalization of the unpaired electron throughout the coordination sphere of the metal as determined by ESR and X-ray crystallography of the CpCr(N0)(PPh3)CH2SiMe3complex. This complex possesses the ability to lose ligands selectively to attain an 18-valence electron configuration. For example, reaction of CpCr(N0)(PPh3)CH2SiMe3 with NO and [INTO]+ results in the formation of the 18-valence electron CpCr(NO)2CH2SiMe3and [CpCr(NO)2PPh3]+ complexes, respectively. Reaction of the CpCr(N0)(PPh3)CH2SiMe3 complex with HSnPh3 yields the first isolable chromium nitrosyl hydride, CpCr(N0)(PPh3)(H)(SnPh3). The solid-state molecular structure of the hydride complex has been established by X-ray methods. The reaction of CpCr(N0)(PPh3)I with Me3SiCH2MgC1 to obtain CpCr(N0)(PPh3)CH2SiMe3 has been studied in some detail by ESR and IR spectrometry. The alkyl complex forms via initial ligand exchange of PPh3 for a solvent molecule, followed by coordination of the nitrosyl oxygen to the organomagnesium reagent. The halide-for-alkyl metathesis step occurs when the thus-formed isonitrosyl complex reacts with another equivalent of the Grignard reagent. Finally, the CpCr(N0)(L)I complexes undergo N-0 bond cleavage when reacted with (mes)MgBr (mes = 2,4,6-C6H2Me3). Further reaction results in the formation of CpCr(N-mes)(mes)(0) and CpCr(N-mes)(mes)I. The latter complex has been structurally characterized by X-ray crystallography. The CpCr(N-mes)(mes)(0) complex reacts with CO to produce (mes)C(0)NH(mes), thus effecting an overall transformation of a coordinated nitrosyl ligand to an organic amide.
Διαδοχικές προσεγγίσεις της ελληνικότητας στη μακρά διάρκεια της νεωτερικότητας: αναζητώντας τη μεγαλύτερη δυνατή συγχρονία
Creators: name: Κόγιας, Μιχαήλ Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ελληνικότητα
Νεωτερικότητα
Ιστορία των Ιδεών
Greekness
Modernity
History of Ideas

description: Στο μελέτημα τούτο εστιάζουμε στις σταθερές συγκροτητικές αρχές, που συμβάλλουν στις στοχαστικές προσαρμογές και διαρκείς μεταποιήσεις της ελληνικότητας στη μακρά διάρκεια της νεωτερικότητας. Το αρχαιοελληνικό και βυζαντινό παρελθόν μέσα από το ιδεολόγημα της αδιάρρηκτης συνέχειας, ο λαϊκός πολιτισμικός κώδικας μαζί με τα καλλιτεχνικά του παράγωγα αλλά και η ένταξη στην ευρωπαϊκή οικογένεια προσεγγίζονται ως οι κύριες και σταθερές πολιτισμικές δομές, οι οποίες (ανα)μορφώνουν την ελληνικότητα σε ένα ιστορικό άνυσμα δύο περίπου αιώνων. Οι απαρχές τους εντοπίζονται στα χρόνια των Φώτων, έπειτα μετασταθμεύουν και μετατονίζονται στον εθνορομαντικό 19ο αιώνα, ενώ εκβάλλουν στις αισθητικές αναζητήσεις του ελληνικού μοντερνισμού. Αντιμετωπίζοντας τον Διαφωτισμό, τον Ρομαντισμό και τον Μοντερνισμό ως τρεις διαδοχικές στιγμές στην Ιστορία των Ιδεών, συμπλέκουμε τον άξονα της συγχρονίας και της διαχρονίας και αναζητάμε σε κάθε παροντική διάσταση της ελληνικότητας μια ορισμένη επανάληψη, ένα ορισμένο παρελθόν. Πρόθεσή μας να διαφανεί πώς η ελληνικότητα – όπως άλλωστε και οι ίδιες οι εποχές – καμώνεται από αυτές τις «διαδοχικές προσεγγίσεις», από αυτές τις επίμονες επαναδιαπραγματεύσεις, που αντιστέκονται και επιβιώνουν στη μακρά διάρκεια
description: Τhis thesis focuses on the steady constituting constructions that contribute to stochastic adaptations and continuing transformations of Greekness in the long-lasting modernity. The ancient Greek and Byzantine past, through the ideological cluster of the uninterrupted continuation, the popular cultural code with its artistic products, as well as the sense of belonging in the European family, are being approached as significant and stable cultural structures which mould "Greekness" for approximately two centuries. Their early days are detected in the Enlightenment era, later they are displaced and shifted in the national romantic 19th century, till they flow into the aesthetic searches of Greek Modernism. Comprehending Enlightenment, Romanticism, and Modernism as three successive times in the History of Ideas, we entwine the synchronic and diachronic axis and look into every present dimension of Greekness a defined continuity, a precise past. Our purpose is to remark how Greekness – as alike the eras – is shaped by these “successive approaches”, by these continued renegotiations, resisting and surviving in the long-term
SELEX: Recent Progress in the Analysis of Charm-Strange and Double-Charm Baryons
Creators: name: Engelfried, Jurgen
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present recent progress in the analysis of the Omega_c^0, the Xi_cc^+ and the Xi_cc^++.
description: Contribution to the proceedings of HQL06, Munich, October 16th-20th 2006
Semantic elicitation: Modality and epistemic indefinites
Creators: name: Yegon, Kiplangat
name: Bossi, Madeline
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: sgc

description: One .mp4 file and one .pdf file. Elicitation of various modal contexts. Elicitation of different nouns with epistemic indefinite forms. Testing of Binder Roof Constraint with epistemic indefinites.
การใช้บริการทรัพยากรสารสนเทศอิเล็กทรอนิกส์ของอาจารย์ที่จัดโดยสำนักวิทยบริการและเทคโนโลยีสารสนเทศ มหาวิทยาลัยราชภัฏสวนดุสิต
Creators: name: รุ่งนะภา โนรี, จิรัชฌา วิเชียรปัญญา
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2556
Subjects: ทรัพยากรสารสนเทศอิเล็กทรอนิกส์,มหาวิทยาลัยราชภัฏสวนดุสิต

description: 3, 9, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Efficient first-principles methodology for the calculation of the all-phonon inelastic scattering in solids
Creators: name: Zacharias, Marios
name: Seiler, Hélène
name: Caruso, Fabio
name: Zahn, Daniela
name: Giustino, Feliciano
name: Kelires, Pantelis C.
name: Ernstorfer, Ralph
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Inelastic scattering experiments are key methods for mapping the full dispersion of fundamental excitations of solids in the ground as well as non-equilibrium states. A quantitative analysis of inelastic scattering in terms of phonon excitations requires identifying the role of multi-phonon processes. Here, we develop an efficient first-principles methodology for calculating the all-phonon quantum mechanical structure factor of solids. We demonstrate our method by obtaining excellent agreement between measurements and calculations of the diffuse scattering patterns of black phosphorus, showing that multi-phonon processes play a substantial role. The present approach constitutes a step towards the interpretation of static and time-resolved electron, X-ray, and neutron inelastic scattering data.
Integration of Multi-Omics Single-Cell Data
Creators: name: Abadi, Al J.
name: Riveros, Carlos
name: Shannon, Casey P.
name: Lee, Heather J.
name: Kim-Anh Lê Cao
Publisher: name: F1000 Research Limited
Year: 2019

description: We analysed transcription in conjunction with CpG methylation for matching cells in two single-cell populations using a sparse latent factor approach. For methylome we considered regions overlapping gene-body, promoter, and CG islands. We identified a subset of correlated markers relevant to the experimental conditions across these data modalities without relying on prior biological knowledge. Our methods are implemented in both supervised and supervised frameworks and are capable of jointly integrating multiple omics.
Συσχετισμός χαρακτηριστικών προσωπικότητας με τεχνικές δεξιότητες προγραμματιστών
Creators: name: Τσίγγος, Βασίλειος Ανδρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Προγραμματιστές
Προσωπικότητα
Τεχνικές Δεξιότητες
Programmers
Personality
Technical Skills
R
Stack Overflow

description: Διανύουμε μια εποχή όπου η τεχνολογία εξελίσσεται με ταχείς ρυθμούς και παράγεται τέτοιος όγκος δεδομένων που είναι δύσκολο να διαχειριστεί. Παρόλα αυτά, αν οι εταιρείες και οι ερευνητές καταφέρουν να εκμεταλλευτούν ακόμα και ένα μικρό μέρος των δεδομένων αυτών, θα μπορέσουν να χαρτογραφήσουν πολύπλοκες έννοιες, όπως είναι η προσωπικότητα του ανθρώπου ή οι τεχνικές του δεξιότητες. Στην παρούσα εργασία ερευνάται εάν υπάρχει συσχέτιση στα χαρακτηριστικά της προσωπικότητας των προγραμματιστών ανάμεσα στις διάφορες κατηγορίες γραπτών κειμένων (Ερωτήσεις, Απαντήσεις) που υποβάλλουν στην ιστοσελίδα Stack Overflow. Επιπροσθέτως, ερευνάται αν υπάρχει συσχέτιση ανάμεσα στις τεχνικές τους δεξιότητες και την προσωπικότητά τους ως προς τις διάφορες κατηγορίες γραπτών κειμένων (Ερωτήσεις, Απαντήσεις) και ποια από αυτές τις δύο κατηγορίες είναι πιο σημαντική στην συσχέτιση. Η προσωπικότητα των προγραμματιστών ορίστηκε βάσει του Μοντέλου των Πέντε Παραγόντων και οι αναλύσεις υλοποιήθηκαν στην προγραμματιστική γλώσσα R
description: We live in an era where technology is evolving rapidly and a large amount of data is produced that is difficult to be managed. However, if companies and researchers manage to exploit even a small portion of this data, they will be able to map complex concepts such as human personality or technical skills. This paper investigates if the characteristics of programmers’ personality are associated among the different categories of written texts (Questions, Answers) which they submit on the website Stack Overflow. In addition, it is investigated, based on the different categories of written texts (Questions, Answers), whether there is a correlation between their technical skills and their personality traits. Also, it is investigated which category of written texts is more important in the correlation. The personality of the programmers was defined based on the Five Factor Model and the correlations were implemented with the programming language R
Magic angle twisted bilayer graphene as a highly efficient quantum Otto engine
Creators: name: Singh, Ayush
name: Benjamin, Colin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: At a discrete set of magic angles, twisted bilayer graphene has been shown to host extraordinarily flat bands, correlated insulating states, unconventional superconductivity, and distinct Landau level degeneracies. In this work, we design a highly efficient quantum Otto engine using a twisted bilayer graphene sample. Flat bands, which occur at magic angles, make the prospect of extracting useful work from our Otto engine lucrative. We use an eight-band continuum model of twisted bilayer graphene to compute efficiencies and work outputs for magic and non-magic angle twists, and compare the results with an $AB$ stacked bilayer and a monolayer. It is observed that the efficiency varies smoothly with the twist angle and the maximum is attained at the magic angle.
description: 9 pages, 8 figures, accepted for publication in Physical Review B
Baryonic content of the pion
Creators: name: Sanchez-Puertas, Pablo
name: Arriola, Enrique Ruiz
name: Broniowski, Wojciech
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The baryon form factor of charged pions arises since isospin symmetry is broken with unequal up and down quark masses, $m_d>m_u$, as well as electromagnetic effects. We obtain estimates for this basic property in two phenomenological ways: from simple constituent quark models, as well as from fitting the $e^+e^- \to π^+ π^-$ data. All our methods yield the result that the baryon mean square radius, extracted from the slope of the form factor, is positive for $π^+$, hence a picture where the outer region has a net baryon, and the inner region a net antibaryon density, both compensating each other such that the total baryon number is zero. For $π^-$ the effect is equal and opposite. We estimate the corresponding mean squared baryon radius as $\langle r^2 \rangle_B^{π^{+}} = (0.03-0.04~{\rm fm})^2$.
description: 7 pages, 5 figures; references and figures added; extended discussions; version accepted for publication in PLB
Asteroseismology with the WIRE satellite
Creators: name: Bruntt, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I give a summary of results from the WIRE satellite, which has been used to observe bright stars from 1999-2000 and 2003-2006. The WIRE targets are monitored for up to five weeks with a duty cycle of 30-40%. The aim has been to characterize the flux variation of stars across the Hertzsprung-Russell diagram. I present an overview of the results for solar-like stars, delta Scuti stars, giant stars, and eclipsing binaries.
description: Accepted for publication in CoAst. Proceedings of the Vienna Workshop on the Future of Asteroseismology (September 2006). 8 pages, 2 figures
Amalgamated Geometric Structure of the Local Multiverse
Creators: name: Potemine, Igor Yu.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider multiverses as time-amalgamated multiply warped products of Lorentzian (Einstein) manifolds. We define the Local Multiverse as timely-connected component of our physical (3+1)-spacetime. It is a collection of ``parallel universes" with (mutually) synchronized timelines. Metaphysical considerations suggest that the Local Multiverse could be an extremely complex agglomeration with, at least, several hundred parallel universes in the Solar neighbourhood (and many thousands in galaxy bulks). In this paper we study a simplified time-almagamated globally hyperbolic model. Our picture implies the multiversality of elementary particles which are, actually, transcosmic (super)strings with multiple endpoints on parallel universes considered as D-branes.
description: 7 pages, 1 figure
การพัฒนาตัวชี้วัดการประยุกต์ใช้เศรษฐกิจพอเพียงของธุรกิจชุมชน: กรณีศึกษาหมู่บ้านโฮมสเตย์ จังหวัดหนองคาย
Creators: name: ธวัชชัย เพ็งพินิจ
name: และคณะ
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2556
Subjects: เศรษฐกิจพอเพียง,ธุรกิจชุมชน,หมู่บ้านโฮมสเตย์,จังหวัดหนองคาย

description: 3, 9, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Probing the Coupling between Dark Components of the Universe
Creators: name: Guo, Zong-Kuan
name: Ohta, Nobuyoshi
name: Tsujikawa, Shinji
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We place observational constraints on a coupling between dark energy and dark matter by using 71 Type Ia supernovae (SNe Ia) from the first year of the five-year Supernova Legacy Survey (SNLS), the cosmic microwave background (CMB) shift parameter from the three-year Wilkinson Microwave Anisotropy Probe (WMAP), and the baryon acoustic oscillation (BAO) peak found in the Sloan Digital Sky Survey (SDSS). The interactions we study are (i) constant coupling delta and (ii) varying coupling delta(z) that depends on a redshift z, both of which have simple parametrizations of the Hubble parameter to confront with observational data. We find that the combination of the three databases marginalized over a present dark energy density gives stringent constraints on the coupling, -0.08 < delta < 0.03 (95% CL) in the constant coupling model and -0.4 < delta_0 < 0.1 (95% CL) in the varying coupling model, where delta_0 is a present value. The uncoupled LambdaCDM model (w_X = -1 and delta = 0) still remains a good fit to the data, but the negative coupling (delta < 0) with the equation of state of dark energy w_X < -1 is slightly favoured over the LambdaCDM model.
description: 9 pages, 7 figures, RevTeX, minor corrections, references added, accepted for publication in Phys. Rev. D
Relativistic Dissipative Hydrodynamics: A Minimal Causal Theory
Creators: name: Koide, T.
name: Denicol, G. S.
name: Mota, Ph.
name: Kodama, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a new formalism for the theory of relativistic dissipative hydrodynamics. Here, we look for the minimal structure of such a theory which satisfies the covariance and causality by introducing the memory effect in irreversible currents. Our theory has a much simpler structure and thus has several advantages for practical purposes compared to the Israel-Stewart theory (IS). It can readily be applied to the full three-dimensional hydrodynamical calculations. We apply our formalism to the Bjorken model and the results are shown to be analogous to the IS.
description: 25 pages, 2 figures, Phys. Rev. C in press
Ορθόδοξη Εκκλησία και Φιλανθρωπία: Η περίπτωση του ‘Φάρου του Κόσμου
Creators: name: Μιχαήλ, Θεανώ Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ορθόδοξη Φιλανθρωπία
Ρομά
Φάρος του Κόσμου»
Orthodox Charity
Rom
Lighthouse of the World (Faros tou kosmou)

description: Σκοπός της παρούσας διατριβής ήταν η μελέτη της φιλανθρωπίας της Ορθόδοξης Εκκλησίας και η παρουσίαση του φιλανθρωπικού έργου του «Φάρου του Κόσμου». Πρώτον, έγινε ιστορική επισκόπηση της Ορθόδοξης Φιλανθρωπίας και αναλύθηκε η σημασία της Χριστιανικής Φιλανθρωπίας. Στη συνέχεια, εξηγήσαμε την έννοια του κοινωνικού αποκλεισμού και του ρατσισμού και δώσαμε τα βασικές πληροφορίες σχετικά με τη κοινωνική και πολιτιστική ταυτότητα του πληθυσμού των Ρομά. Τέλος, παρουσιάσαμε την ίδρυση και λειτουργία του "Φάρου του Κόσμου". Επίσης σχολιάσαμε τα επιτυχημένα αποτελέσματά του στη κοινωνικοποίηση και την ένταξη των νεαρών Ρομά στη κοινωνία
description: The aim of the present thesis was the study of the charity of Orthodox Church and the presentation of the charity work of “Lighthouse of The World”. Firstly, was made a historical overview of Orthodox Charity and was analyzed the importance of Christian Charity. After that, we explained the concept of social exclusion and racism and we provided the basics social and cultural information about Roma population. Finally, we presented the establishment and operation of “Lighthouse of The World”. We also commented on its successful results on the socialization and integration of Roma youth in the social community
Generation of twin Fock states via transition from a two-component Mott insulator to a superfluid
Creators: name: Rodríguez, M.
name: Clark, S. R.
name: Jaksch, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose the dynamical creation of twin Fock states, which exhibit Heisenberg limited interferometric phase sensitivities, in an optical lattice. In our scheme a two-component Mott insulator with two bosonic atoms per lattice site is melted into a superfluid. This process transforms local correlations between hyperfine states of atom pairs into multi-particle correlations extending over the whole system. The melting time does not scale with the system size which makes our scheme experimentally feasible.
description: 4 pages, 4 figures
Can Spinor Dipolar Effects be Observed in Bose-Einstein Condensates?
Creators: name: Kawaguchi, Yuki
name: Saito, Hiroki
name: Ueda, Masahito
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Weak dipolar effects in atomic Bose-Einstein condensates (BECs) have recently been predicted to develop spin textures. However, observation of these effects requires magnetic field as low as $\sim 10 μ$G for spin-1 alkali BECs, so that they are not washed out by the Zeeman effect. We present a scheme to observe the magnetic dipole-dipole interaction in alkali BECs under a realistic magnetic field of $\sim 100$ mG. Our scheme enables us to extract genuine dipolar effects and should apply also to $^{52}$Cr BECs.
description: 4 pages, 3 figures
Effect of the Inverse Volume Modification in Loop Quantum Cosmology
Creators: name: Xiong, Hua-Hui
name: Zhu, Jian-Yang
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It is known that in loop quantum cosmology (LQC) the universe avoids the singularity by a bounce when the matter density approaches the critical density $ρ_c$ (the order of Planck density). After incorporating the inverse volume modifications both in the gravitational and matter part in the improved framework of LQC, we find that the inverse volume modification can decrease the bouncing energy scale, and the presence of nonsingular bounce is generic. For the backward evolution in the expanding branch, in terms of different initial states the evolution trajectories classify into two classes. One class with larger initial energy density leads to the occurrence of bounce in the region $a>a_{ch}$ where $a_{ch}$ marks the different inverse volume modification region. The other class with smaller initial energy density evolves back into the region $a
description: revised version
Stereo CenterNet based 3D Object Detection for Autonomous Driving
Creators: name: Shi, Yuguang
name: Guo, Yu
name: Mi, Zhenqiang
name: Li, Xinjie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Recently, three-dimensional (3D) detection based on stereo images has progressed remarkably; however, most advanced methods adopt anchor-based two-dimensional (2D) detection or depth estimation to address this problem. Nevertheless, high computational cost inhibits these methods from achieving real-time performance. In this study, we propose a 3D object detection method, Stereo CenterNet (SC), using geometric information in stereo imagery. SC predicts the four semantic key points of the 3D bounding box of the object in space and utilizes 2D left and right boxes, 3D dimension, orientation, and key points to restore the bounding box of the object in the 3D space. Subsequently, we adopt an improved photometric alignment module to further optimize the position of the 3D bounding box. Experiments conducted on the KITTI dataset indicate that the proposed SC exhibits the best speed-accuracy trade-off among advanced methods without using extra data.
Entanglement and fidelity signatures of quantum phase transitions in spin liquid models
Creators: name: Tribedi, Amit
name: Bose, Indrani
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider a spin ladder model which is known to have matrix product states as exact ground states with spin liquid characteristics. The model has two critical-point transitions at the parameter values u=0 and infinity. We study the variation of entanglement and fidelity measures in the ground states as a function of u and specially look for signatures of quantum phase transitions at u=0 and infinity. The two different entanglement measures used are S(i) (the single-site von Neumann entropy) and S(i, j) (the two-body entanglement). At the quantum critical point (QCP) u=infinity, the entanglement measure E (=S(i) ,S(i, j)) vanishes but remains nonzero at the other QCP u=0. The first and second derivatives of E with respect to the parameter u and the entanglement length associated with S(i, j) are further calculated to identify special features, if any, near the QCPs. We further determine the GS fidelity F and a quantity ln(D) related to the second derivative of F and show that these quantities calculated for finite-sized systems are good indicators of QPTs occurring in the infinite system.
description: 18 pages, 7 figures
A $μ$-mode integrator for solving evolution equations in Kronecker form
Creators: name: Caliari, Marco
name: Cassini, Fabio
name: Einkemmer, Lukas
name: Ostermann, Alexander
name: Zivcovich, Franco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this paper, we propose a $μ$-mode integrator for computing the solution of stiff evolution equations. The integrator is based on a $d$-dimensional splitting approach and uses exact (usually precomputed) one-dimensional matrix exponentials. We show that the action of the exponentials, i.e. the corresponding batched matrix-vector products, can be implemented efficiently on modern computer systems. We further explain how $μ$-mode products can be used to compute spectral transforms efficiently even if no fast transform is available. We illustrate the performance of the new integrator by solving, among the others, three-dimensional linear and nonlinear Schrödinger equations, and we show that the $μ$-mode integrator can significantly outperform numerical methods well established in the field. We also discuss how to efficiently implement this integrator on both multi-core CPUs and GPUs. Finally, the numerical experiments show that using GPUs results in performance improvements between a factor of $10$ and $20$, depending on the problem.
Deconvolving Instrumental and Intrinsic Broadening in Excited State X-ray Spectroscopies
Creators: name: Fister, T. T.
name: Seidler, G. T.
name: Rehr, J. J.
name: Kas, J. J.
name: Elam, W. T.
name: Cross, J. O.
name: Nagle, K. P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Intrinsic and experimental mechanisms frequently lead to broadening of spectral features in excited-state spectroscopies. For example, intrinsic broadening occurs in x-ray absorption spectroscopy (XAS) measurements of heavy elements where the core-hole lifetime is very short. On the other hand, nonresonant x-ray Raman scattering (XRS) and other energy loss measurements are more limited by instrumental resolution. Here, we demonstrate that the Richardson-Lucy (RL) iterative algorithm provides a robust method for deconvolving instrumental and intrinsic resolutions from typical XAS and XRS data. For the K-edge XAS of Ag, we find nearly complete removal of ~9.3 eV FWHM broadening from the combined effects of the short core-hole lifetime and instrumental resolution. We are also able to remove nearly all instrumental broadening in an XRS measurement of diamond, with the resulting improved spectrum comparing favorably with prior soft x-ray XAS measurements. We present a practical methodology for implementing the RL algorithm to these problems, emphasizing the importance of testing for stability of the deconvolution process against noise amplification, perturbations in the initial spectra, and uncertainties in the core-hole lifetime.
description: 35 pages, 13 figures
Swift/BAT and RXTE Observations of the Peculiar X-ray Binary 4U 2206+54 - Disappearance of the 9.6 Day Modulation
Creators: name: Corbet, R. H. D.
name: Markwardt, C. B.
name: Tueller, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Observations of the high-mass X-ray binary 4U 2206+54 with the Swift Burst Alert Telescope (BAT) do not show modulation at the previously reported period of 9.6 days found from observations made with the Rossi X-ray Timing Explorer (RXTE) All-Sky Monitor (ASM). Instead, the strongest peak in the power spectrum of the BAT light curve occurs at a period of 19.25 +/- 0.08 days, twice the period found with the RXTE ASM. The maximum of the folded BAT light curve is also delayed compared to the maximum of the folded ASM light curve. The most recent ASM data folded on twice the 9.6 day period show similar morphology to the folded BAT light curve. This suggests that the apparent period doubling is a recent secular change rather than an energy-dependent effect. The 9.6 day period is thus not a permanent strong feature of the light curve. We suggest that the orbital period of 4U 2206+54 may be twice the previously proposed value.
description: Accepted for publication in The Astrophysical Journal