cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
BPS Wilson Loops on S^2 at Higher Loops
Creators: name: Young, Donovan
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider supersymmetric Wilson loops of the variety constructed by Drukker, Giombi, Ricci, and Trancanelli, whose spatial contours lie on a two-sphere. Working to second order in the 't Hooft coupling in planar N=4 Supersymmetric Yang-Mills Theory (SYM), we compute the vacuum expectation value of a wavy-latitude and of a loop composed of two longitudes. We evaluate the resulting integrals numerically and find that the results are consistent with the zero-instanton sector calculation of Wilson loops in 2-d Yang-Mills on S^2 performed by Bassetto and Griguolo. We also consider the connected correlator of two distinct latitudes to third order in the 't Hooft coupling in planar N=4 SYM. We compare the result in the limit where the latitudes become coincident to a perturbative calculation in 2-d Yang-Mills on S^2 using a light-cone Wu-Mandelstam-Leibbrandt prescription. We are not able to calculate the SYM result at the required order in the separation between the latitudes necessary for a match with 2-d Yang-Mills; the result, however, does not preclude such a match.
description: 39 pages, 15 figures. v2 references added, minor cosmetic changes. v3 minor error in eq. (40) corrected. v4 error in coincident limit of correlator corrected; claims of disagreement with 2-d Yang-Mills retracted
Congruences between Ramanujan's tau function and elliptic curves, and Mazur--Tate elements at additive primes
Creators: name: Doyon, Anthony
name: Lei, Antonio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We show that if $E/\mathbb{Q}$ is an elliptic curve with a rational $p$-torsion for $p=2$ or $3$, then there is a congruence relation between Ramanujan's tau function and $E$ modulo $p$. We make use of such congruences to compute the Iwasawa invariants of $2$-adic and $3$-adic Mazur--Tate elements attached to Ramanujan's tau function. We also investigate numerically the Iwasawa invariants of the Mazur--Tate elements attached to an elliptic curve with additive reduction at a fixed prime number.
description: To appear in the Ramanujan Journal
Conflict Resolution with Equitative Algorithms: A Tool to Establish A European Common Ground of Available Rights
Creators: name: Salehi, Seyedeh Sajedeh
name: Giacalone, Marco
Publisher: name: Zenodo
Year: 2019
Subjects: Conflict Resolution, Algorithms, Civil Law, Asset Division

description: The current study examines the application of algorithms in resolving civil conflicts within the EU with specific focus on divorce and inheritance concerning asset division. For that purpose, this paper initially argues the applicability and advantages of deploying algorithmic conflict resolution for civil disputes, in general terms. Then, the best practices established at the global level in the United States, Canada and Australia will be discussed followed by the European approach towards the use of algorithms in resolving disputes. Next, the authors will focus on arguing how the use of the algorithmic dispute resolution method can best fit within the European context of civil dispute resolution-considering the existing inconsistencies among civil and civil procedural rules of the Member States-leading us to establish for the first time a European Common Ground of Available Rights at the EU level. Finally , this study lays out the project on Conflict Resolution with Equitative Algorithms (CREA) and looks at the results achieved through the data collection process and analysis of such data contributing towards the two major practical achievements of this project, namely developing CREA Software, which assists disputants to resolve their property division related conflicts through this online tool, and the establishment of the EU Common Ground of Available Rights framework, with the principle aim of tackling the existing inconsistencies in civil and civil procedural rules on divorce and inheritance within the EU.
The relativity of inertia and reality of nothing
Creators: name: Afriat, Alexander
name: Caccese, Ermenegildo
Publisher: name: arXiv
Year: 2008
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We first see that the inertia of Newtonian mechanics is absolute and troublesome. General relativity can be viewed as Einstein's attempt to remedy, by making inertia relative, to matter---perhaps imperfectly though, as at least a couple of freedom degrees separate inertia from matter in his theory. We consider ways the relationist (for whom it is of course unwelcome) can try to overcome such undetermination, dismissing it as physically meaningless, especially by insisting on the right transformation properties.
description: This is the best version available (the Studies version having suffered the many initiatives of an imaginative and zealous typesetter)
Four-Dimensional Gravity on a Covariant Noncommutative Space (II)
Creators: name: Manolakos, G.
name: Manousselis, P.
name: Zoupanos, G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Based on the construction of the 4-dim noncommutative gravity model described in our previous work, first, a more extended description of the covariant noncommutative space (fuzzy 4-dim de Sitter space), which accommodates the gravity model, is presented and then the corresponding field equations, which are obtained after variation of the previously proposed action, are extracted. Also, a spontaneous breaking of the initial symmetry is performed, this time induced by the introduction of an auxiliary scalar field, and its implications in the reduced theory, which is produced after considering the commutative limit, are examined.
Methods for Semantic Interoperability in AutomationML-based Engineering
Creators: name: Hua, Yingbing
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2021
Subjects: Interoperability
AutomationML
Concept Learning
Query By Example

description: Industrial engineering is an interdisciplinary activity that involves human experts from various technical backgrounds working with different engineering tools. In the era of digitization, the engineering process generates a vast amount of data. To store and exchange such data, dedicated international standards are developed, including the XML-based data format AutomationML (AML). While AML provides a harmonized syntax among engineering tools, the semantics of engineering data remains highly heterogeneous. More specifically, the AML models of the same domain or entity can vary dramatically among different tools that give rise to the so-called semantic interoperability problem. In practice, manual implementation is often required for the correct data interpretation, which is usually limited in reusability. Efforts have been made for tackling the semantic interoperability problem. One mainstream research direction has been focused on the semantic lifting of engineering data using Semantic Web technologies. However, current results in this field lack the study of building complex domain knowledge that requires a profound understanding of the domain and sufficient skills in ontology building. This thesis contributes to this research field in two aspects. First, machine learning algorithms are developed for deriving complex ontological concepts from engineering data. The induced concepts encode the relations between primitive ones and bridge the semantic gap between engineering tools. Second, to involve domain experts more tightly into the process of ontology building, this thesis proposes the AML concept model (ACM) for representing ontological concepts in a native AML syntax, i.e., providing an AML-frontend for the formal ontological semantics. ACM supports the bidirectional information flow between the user and the learner, based on which the interactive machine learning framework AMLLEARNER is developed. Another rapidly growing research field devotes to develop methods and systems for facilitating data access and exchange based on database theories and techniques. In particular, the so-called Query By Example (QBE) allows the user to construct queries using data examples. This thesis adopts the idea of QBE in AML-based engineering by introducing the AML Query Template (AQT). The design of AQT has been focused on a native AML syntax, which allows constructing queries with conventional AML tools. This thesis studies the theoretical foundation of AQT and presents algorithms for the automated generation of query programs. Comprehensive requirement analysis shows that the proposed approach can solve the problem of semantic interoperability in AutomationML-based engineering to a great extent.
Triple-Point Defective Ruled Surfaces
Creators: name: Chiantini, Luca
name: Markwig, Thomas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14H10, 14J10, 14C20, 32S15

description: In arXive:0705.3912 we studied triple-point defective very ample linear systems on regular surfaces, and we showed that they can only exist if the surface is ruled. In the present paper we show that we can drop the regularity assumption, and we classify the triple-point defective very ample linear systems on ruled surfaces.
description: 15 pages
Automatic Speaker Independent Dysarthric Speech Intelligibility Assessment System
Creators: name: Tripathi, Ayush
name: Bhosale, Swapnil
name: Kopparapu, Sunil Kumar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Sound (cs.SD)
subject: Artificial Intelligence (cs.AI)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Dysarthria is a condition which hampers the ability of an individual to control the muscles that play a major role in speech delivery. The loss of fine control over muscles that assist the movement of lips, vocal chords, tongue and diaphragm results in abnormal speech delivery. One can assess the severity level of dysarthria by analyzing the intelligibility of speech spoken by an individual. Continuous intelligibility assessment helps speech language pathologists not only study the impact of medication but also allows them to plan personalized therapy. It helps the clinicians immensely if the intelligibility assessment system is reliable, automatic, simple for (a) patients to undergo and (b) clinicians to interpret. Lack of availability of dysarthric data has resulted in development of speaker dependent automatic intelligibility assessment systems which requires patients to speak a large number of utterances. In this paper, we propose (a) a cost minimization procedure to select an optimal (small) number of utterances that need to be spoken by the dysarthric patient, (b) four different speaker independent intelligibility assessment systems which require the patient to speak a small number of words, and (c) the assessment score is close to the perceptual score that the Speech Language Pathologist (SLP) can relate to. The need for small number of utterances to be spoken by the patient and the score being relatable to the SLP benefits both the dysarthric patient and the clinician from usability perspective.
description: 29 pages, 2 figures, Computer Speech & Language 2021
CREA: An Introduction to Conflict Resolution with Equitative Algorithms
Creators: name: Giacalone, Marco
name: Salehi, Seyedeh Sajedeh
Publisher: name: Zenodo
Year: 2020
Subjects: Conflict Resolution, Algorithms, Civil Law, Asset Division, CREA Project

description: This study explores the CREA (Conflict Resolution with Equitative Algorithms) project and examines the applicability of game-theory algorithms in cross-border civil dispute resolution in the EU. The main argument in this study is concerned with the applicability of algorithms in resolving disputes over asset division in divorce and inheritance, aiming at increasing the parties’ mutual satisfaction
 for the achieved settlement. Therefore, in the initial part of this study, the authors will provide a brief introduction to the topic, followed by the ‘Literature Review’ that examines the literature about fundamental concepts of the algorithmic-based dispute resolution procedure. Next, the paper will discuss the research methodology applied by the authors and the results obtained. Then, in the Findings section, a comparative approach will be used in evaluating the data collected from several EU Member States as regards their rules on divorce and inheritance. The concept of the EU Common Ground of Available Rights and its impact on the CREA model of dispute resolution will also be discussed. Finally, the authors will elaborate the existing limitations in the course of conducting the current research, followed by the conclusion and future prospects.
Grazing incidence X-ray fluorescence based characterization of nanostructures for element sensitive profile reconstruction
Creators: name: Andrle, Anna
name: Hönicke, Philipp
name: Schneider, Philipp
name: Kayser, Yves
name: Hammerschmidt, Martin
name: Burger, Sven
name: Scholze, Frank
name: Beckhoff, Burkhard
name: Soltwisch, Victor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: For the reliable fabrication of the current and next generation of nanostructures it is essential to be able to determine their material composition and dimensional parameters. Using the grazing incidence X-ray fluoresence technique, which is taking advantage of the X-ray standing wave field effect, nanostructures can be investigated with a high sensitivity with respect to the structural and elemental composition. This is demonstrated using lamellar gratings made of Si$_3$N$_4$. Rigorous field simulations obtained from a Maxwell solver based on the finite element method allow to determine the spatial distribution of elemental species and the geometrical shape with sub-nm resolution. The increasing complexity of nanostructures and demanded sensitivity for small changes quickly turn the curse of dimensionality for numerical simulation into a problem which can no longer be solved rationally even with massive parallelisation. New optimization schemes, e.g. machine learning, are required to satisfy the metrological requirements. We present reconstruction results obtained with a Bayesian optimization approach to reduce the computational effort.
description: Event: SPIE Optical Metrology, 2019, Munich, Germany. arXiv admin note: text overlap with arXiv:1801.04157
The effects of lepton KK modes on the lepton electric dipole moments in the Randall Sundrum scenario
Creators: name: Iltan, E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the charged lepton electric dipole moments in the Randall Sundrum model where the leptons and the gauge fields are accessible to the extra dimension. We observe that the electron (muon; tau) electric dipole moment reaches to the value of the order of 10^{-26} e-cm (10^{-20} e-cm; 10^{-20} e-cm) with the inclusion of the lepton KK modes.
description: 17 pages, 5 figures, 2 tables
Bandwidth control of the biphoton wavefunction exploiting spatio-temporal correlations
Creators: name: Varga, J. J. Miguel
name: Lasa-Alonso, Jon
name: Molezuelas-Ferreras, Martín
name: Tischler, Nora
name: Molina-Terriza, Gabriel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this work we study the spatio-temporal correlations of photons produced by spontaneous parametric down conversion. In particular, we study how the waists of the detection and pump beams impact on the spectral bandwidth of the photons. Our results indicate that this parameter is greatly affected by the spatial properties of the detection beam, while not as much by the pump beam. This allows for a simple experimental implementation to control the bandwidth of the biphoton spectra, which only entails modifying the optical configuration to collect the photons. Moreover, we have performed Hong-Ou-Mandel interferometry measurements that also provide the phase of the biphoton wavefunction, and thereby its temporal shape. We explain all these results with a toy model derived under certain approximations, which accurately recovers most of the interesting experimental details.
description: 10 pages, 4 figures
Isolate record for VAFB-ISO-696
Creators: name: Holloway, Corinne
Year: 1900
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-696. The artifact is a projectile point tip.
A local reduction of the Dirac equation applied to the study of quark interactions
Creators: name: De Sanctis, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A general procedure of local reduction for the Dirac equation is introduced to study one- and n-body interacting systems. In the one-body case we show that the reduction allows for an approximate solution of the Dirac equation, correlating the upper and the lower components of the wave function. The two-body case is studied in more detail. We show that the method prevents from introducing spurious, unphysical states. The reduction is also applied to another relativistic equation. Finally, the method is used to construct a specific model in order to study the Charmonium spectrum.
description: 33 pages, 2 tables
title: Die Ethisierung dogmatischer Lehrstücke
title: Transformationen des Protestantismus in den 1970/1980er Jahren
titleType: Subtitle
Creators: name: Hoffmann, Anne Friederike
Publisher: name: Evangelische Verlagsanstalt
Year: 2018

description: Was unter Luther, lutherischer Theologie und Reformation verstanden wird, versteht sich nicht von selbst. Ihre Deutung ist immer von gegenwärtigen Fragestellungen und Perspektiven geleitet. Sie springt mit ihrem Erkenntnisinteresse nicht direkt ins 16. Jahrhundert zurück. Vielmehr kann sie auf Deutungstraditionen zurückgreifen, die das eigene Problembewusstsein schärfen. Ein Verstehen von Luther und der Reformation bedeutet also immer auch ein Verstehen von etwas schon Verstandenem, eine Hermeneutik von Luther- und Reformationsrezeptionen. 
Die in diesem Band versammelten Aufsätze rekonstruieren in theologiegeschichtlicher, ökumenischer, soziologischer und homiletischer Hinsicht wichtige Deutungen der Person Luthers und der Reformation in Hinblick auf ihre jeweils erkenntnisleitende Hermeneutik. Damit leistet dieser Band einen Beitrag zum gegenwärtigen Verständnis der Reformation und einer lutherischen Theologie. 

Mit Beiträgen von Daniela Blum, Claas Cordemann, Christina Costanza, Anne Friederike Hoffmann, Jan Kingreen, Arne Lademann, Constantin Plaul, Georg Raatz, Notger Slenczka und Karl Tetzlaff.
On Certain Probabilistic Properties of Polynomials over the Ring of $p$-adic Integers
Creators: name: Lei, Antonio
name: Poulin, Antoine
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: In this article, we study several probabilistic properties of polynomials defined over the ring of $p$-adic integers under the Haar measure. First, we calculate the probability that a monic polynomial is separable, generalizing a result of Polak. Second, we introduce the notion of two polynomials being strongly coprime and calculate the probability of two monic polynomials {being} strongly coprime. Finally, we explain how our method can be used to extrapolate other probabilistic properties of polynomials over the ring of $p$-adic integers from polynomials defined over the integers modulo powers of $p$.
Συμμαχικές επιδιώξεις και διπλωματικές παλινδρομήσεις: Οι ελληνοσερβικές σχέσεις από την προσάρτηση της Ανατολικής Ρωμυλίας μέχρι την Νεοτουρκική Επανάσταση (1885-1908)
Creators: name: Λούπας, Αθανάσιος Δ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Μακεδονικό Ζήτημα
Βαλκανική Ιστορία
Ελληνοσερβικές σχέσεις
Σερβική πολιτική στη Μακεδονία (19ος αιώνας)
Βαλκανική Ομοσπονδία (19ος αιώνας)
Macedonian Question
Balkan History
Greek-Serbian relations
Serbian Policy in Macedonia (19th century)
Balkan Confederation (19th century)

description: Σκοπός της διατριβής ήταν να διερευνήσει διεξοδικά την πορεία και να αποτυπώσει τις διακυμάνσεις των ελληνοσερβικών σχέσεων, φωτίζοντας παράλληλα τις σημαντικότερες όψεις της σερβικής πολιτικής στη Μακεδονία σε μία κρίσιμη φάση του Ανατολικού Ζητήματος. Συγκεκριμένα η παρούσα μελέτη εμβαθύνει την έρευνα, αναδεικνύοντας τους παράγοντες που διαδραμάτισαν καθοριστικό ρόλο στην εξέλιξη των διαπραγματεύσεων για τον διαχωρισμό των σφαιρών επιρροής στη Μακεδονία στα τέλη του 19ου αιώνα, την οπτική της εκάστοτε πλευράς αναφορικά με το χαρακτήρα και την προοπτική της σχεδιαζόμενης ελληνοσερβικής συνεννόησης, τις προτεραιότητες και τις επιδιώξεις των δύο εμπλεκομένων, την τυχόν επίδραση εξωτερικών παραγόντων αλλά και των εσωτερικών εξελίξεων στην πορεία των διαπραγματεύσεων. Παράλληλα, εξετάζονται επί μέρους ζητήματα όπως η σερβική οπτική στο ζήτημα της Βαλκανικής Ομοσπονδίας, οι επιδιώξεις της σερβικής εξωτερικής πολιτικής κατά τη διάρκεια της ελληνοτουρκικής κρίσης του 1897, οι διαφορετικές όψεις της σερβικής πολιτικής όσον αφορά την αυτονόμηση της Μακεδονίας στα τέλη του 19ου και τις αρχές του 20ου αιώνα ενώ τέλος επιχειρείται μια επισκόπηση των ελληνοσερβικών σχέσεων κατά τη διάρκεια του Μακεδονικού Αγώνα.
description: The aim of the present thesis was to scrutinize the course and present the fluctuations of the Greek-Serbian relations while illuminating the main aspects of the serbian policy in Macedonia during a critical phase of the Eastern Question. In particular, the study deepens the research on the matter, highlighting the factors that played a decisive role during the talks on delineating a Greek and Serbian zone of influence in Macedonia at the end of the 19th century, Greek and Serbian point of view regarding the character and the perspective of the planned Greek-Serbian understanding, the priorities and the aspirations of the two parties involved, the possible influence of external factors and internal developments during the negotiations. Additional matters such as the Serbian perspective on the issue of Balkan Confederation, Serbia’s attitude during the Greek-Turkish war in 1897 or the various aspects of Serbian policy towards the autonomy of Macedonia in the late 19th and early 20th century are being also examined. Finally, the study provides an overview of the Greek-Serbian relations during the Macedonian Struggle.
Room-Temperature Topological Phase Transition in Quasi-One-Dimensional Material Bi$_4$I$_4$
Creators: name: Huang, Jianwei
name: Li, Sheng
name: Yoon, Chiho
name: Oh, Ji Seop
name: Wu, Han
name: Liu, Xiaoyuan
name: Dhale, Nikhil
name: Zhou, Yan-Feng
name: Guo, Yucheng
name: Zhang, Yichen
name: Hashimoto, Makoto
name: Lu, Donghui
name: Denlinger, Jonathan
name: Wang, Xiqu
name: Lau, Chun Ning
name: Birgeneau, Robert J.
name: Zhang, Fan
name: Lv, Bing
name: Yi, Ming
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Quasi-one-dimensional (1D) materials provide a superior platform for characterizing and tuning topological phases for two reasons: i) existence for multiple cleavable surfaces that enables better experimental identification of topological classification, and ii) stronger response to perturbations such as strain for tuning topological phases compared to higher dimensional crystal structures. In this paper, we present experimental evidence for a room-temperature topological phase transition in the quasi-1D material Bi$_4$I$_4$, mediated via a first order structural transition between two distinct stacking orders of the weakly-coupled chains. Using high resolution angle-resolved photoemission spectroscopy on the two natural cleavable surfaces, we identify the high temperature $β$ phase to be the first weak topological insulator with gapless Dirac cones on the (100) surface and no Dirac crossing on the (001) surface, while in the low temperature $α$ phase, the topological surface state on the (100) surface opens a gap, consistent with a recent theoretical prediction of a higher-order topological insulator beyond the scope of the established topological materials databases that hosts gapless hinge states. Our results not only identify a rare topological phase transition between first-order and second-order topological insulators but also establish a novel quasi-1D material platform for exploring unprecedented physics.
description: 9 pages, 4 figures, accepted for publication in Phys. Rev. X
Isolate record for VAFB-ISO-661
Creators: name: Holloway, Corinne
Year: 1900
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Chert
valueUri: https://core.tdar.org/browse/material-type/213/chert
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-661. The artifact is a brown and white banded Monterey chert flake.
Aeroelastic instability of cantilevered flexible plates in uniform flow
Creators: name: Eloy, Christophe
name: Lagrange, Romain
name: Souilliez, Claire
name: Schouveiler, Lionel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We address the flutter instability of a flexible plate immersed in an axial flow. This instability is similar to flag flutter and results from the competition between destabilising pressure forces and stabilising bending stiffness. In previous experimental studies, the plates have always appeared much more stable than the predictions of two-dimensional models. This discrepancy is discussed and clarified in this paper by examining experimentally and theoretically the effect of the plate aspect ratio on the instability threshold. We show that the two-dimensional limit cannot be achieved experimentally because hysteretical behaviour and three-dimensional effects appear for plates of large aspect ratio. The nature of the instability bifurcation (sub- or supercritical) is also discussed in the light of recent numerical results.
Megnyilatkozáskezdő magánhangzók  glottális  jelöltsége a szintaktikai pozíció és a  magánhangzó-minőség  függvényében
Creators: name: Markó, Alexandra
name: Gráczi, Tekla Etelka
name: Deme, Andrea
name: Bartók, Márton
name: Csapó, Tamás Gábor
Publisher: name: Beszédkutatás
Year: 2019

description: Glottal marking of utterance-initial vowels as a function of the syntactic position and the vowel quality


In the present study, the glottal marking of utterance-initially appearing vowels was analysed with respect to the syntactic position, the vowel quality, the formal characteristics of the glottal marking (glottal stop, glottalization, and their combination), and the inter-speaker variability.
Four members of the Hungarian vowel-inventory were chosen for the analysis: front and high /i/, back and high /u/, front and low /ɛ/ and back and low /ɒ/ (in these examples the feature backness co-varies with lip spreading). From these vowels, V 1 pV 1 structured words (/ipi/, /upu/, /ɛpɛ/, /ɒpɒ/) were constructed, in which we analysed the word-initial vowel. The (pseudo-)words were embedded into meaningful sentences. We analysed the target words in two conditions: they were positioned in pre-focal topic and in focus positions, both occurring sentence-initially. Acoustic recordings were made with 20 female native Hungarian speakers (aged from 19 to 28 years) with an omnidirectional condenser microphone at 44.1 kHz sampling rate. With each participant, 40 target utterances (5 repetitions per each vowel in each condition) and 80 filler utterances (with the same dialogue and sentence construction) were recorded.
The results showed that the frequency of glottal marking did not differ between the analysed utterance-initial syntactic positions (focus and topic), in both cases more than 70% of the vowels were glottally marked. The vowel quality, however, had an effect on the frequency of glottal marking. With respect to vowel openness, we found (in accordance with earlier studies) that open vowels showed glottal marking in a higher frequency than their closed counterparts did. The backness of the vowels, however, did not show the expected tendency, since the frequency of glottal marking was higher in the case of the front vowels. The ratio of the analysed formal variants (glottal stop, glottalization, and their combination) did not differ in terms of syntactic position, although they did with respect to the dimensions of vowel quality. The inter-speaker variability was highly observed in all of the analysed parameters.
description: Beszédkutatás, Évf. 27 szám 1 (2019): Beszédkutatás
Dokumentation und Annotationsrichtlinien für das Korpus WroDiaCo Version 2
Creators: name: Wesolek, Sarah
name: Belz, Malte
Publisher: name: Zenodo
Year: 2021
Subjects: Phonetic corpus
Spontaneous dialogue

description: Documentation and annotation guidelines for the Wrocław Dialogue Corpus. This phonetic corpus contains 8 sessions of 16 participants speaking Polish as native and German as a foreign language. Each session consists of a task-based spontaneous dialogue, a task-free spontaneous dialogue, and the reading of a word list.
Testing Explanations of the $B\toϕK^*$ Polarization Puzzle
Creators: name: Datta, Alakabha
name: Gritsan, Andrei V.
name: London, David
name: Nagashima, Makiko
name: Szynkman, Alejandro
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: $B\toϕK^*$ ($\btos$) is three separate decays, one for each polarization of the final-state vector mesons (one longitudinal, two transverse). It is observed that the fraction of transverse decays, $\fT$, and the fraction of longitudinal decays, $\fL$, are roughly equal: $\fTfL \simeq 1$, in opposition to the naive expectation that $\fT \ll \fL$. If one requires a single explanation of all polarization puzzles, two possibilities remain within the standard model: penguin annihilation and rescattering. In this paper we examine the predictions of these two explanations for $\fTfL$ in $\btod$ decays. In $B \to ρρ$ decays, only $\bd \to ρ^0ρ^0$ can possibly exhibit a large $\fTfL$. In B decays related by U-spin, we find two promising possibilities: (i) $B^+ \to K^{*0} ρ^+$ ($\btos$) and $B^+ \to \Kbar^{*0} K^{*+}$ ($\btod$) and (ii) $\bs \to K^{*0} \Kbar^{*0}$ ($\btos$) and $\bd \to \Kbar^{*0} K^{*0}$ ($\btod$). The measurement of $\fTfL$ in these pairs of decays will allow us to test penguin annihilation and rescattering. Finally, it is possible to distinguish penguin annihilation from rescattering by performing a time-dependent angular analysis of $\bd \to \Kbar^{*0} K^{*0}$.
description: 15 pages, 2 figures. Added reference and PACS numbers. To appear in PRD
18.8 Gbps real-time quantum random number generator with a photonic integrated chip
Creators: name: Bai, Bing
name: Huang, Jianyao
name: Qiao, Guan-Ru
name: Nie, You-Qi
name: Tang, Weijie
name: Chu, Tao
name: Zhang, Jun
name: Pan, Jian-Wei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Cryptography and Security (cs.CR)
subject: Optics (physics.optics)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Quantum random number generators (QRNGs) can produce true random numbers. Yet, the two most important QRNG parameters highly desired for practical applications, i.e., speed and size, have to be compromised during implementations. Here, we present the fastest and miniaturized QRNG with a record real-time output rate as high as 18.8 Gbps by combining a photonic integrated chip and the technology of optimized randomness extraction. We assemble the photonic integrated circuit designed for vacuum state QRNG implementation, InGaAs homodyne detector and high-bandwidth transimpedance amplifier into a single chip using hybrid packaging, which exhibits the excellent characteristics of integration and high-frequency response. With a sample rate of 2.5 GSa/s in a 10-bit analog-to-digital converter and subsequent paralleled postprocessing in a field programmable gate array, the QRNG outputs ultrafast random bitstreams via a fiber optic transceiver, whose real-time speed is validated in a personal computer.
description: 5 pages, 4 figures. Accepted for publication in Applied Physics Letters
Can (H2O)n (n = 1–2) as effective catalysts in the CH2OO + H2S reaction under tropospheric conditions?
Creators: name: Wang, Rui
name: Wen, Mingjie
name: Chen, Xu
name: Zhang, Yongqi
name: Geng, Ximei
name: Su, Yingshi
name: Liang, Meng
name: Shao, Xianzhao
name: Wang, Wei
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences

description: The addition reaction of CH2OO + H2S → HSCH2OOH without and with catalyst X (X = H2O and (H2O)2) has been investigated by CCSD(T)-F12a/VTZ-F12//B3LYP/aug-cc-pVTZ method and canonical variational transition state theory with small curvature tunneling correction. When H2O was introduced in the CH2OO + H2S reaction, it not only acts as a catalyst for producing HSCH2OOH, but also plays as a reactant to forming HOCH2OOH. The formation channel of HSCH2OOH is more important than the formation channel of HOCH2OOH with its calculated rate constant larger by 11.0–43.2 times within the temperature 280–320 K. Then, (H2O)2 catalysed CH2OO + H2S → HSCH2OOH reaction has been taken into account with its rate lower 1.9–4.2 times than the reaction of CH2OO + H2S → HSCH2OOH with water. Also, CH2OO + H2S with H2O cannot compete with the CH2OO + H2S reaction without water. This is different from CH2OO + (H2O)2 reaction, which is about 4 orders of magnitude larger than the rate constant for CH2OO + H2O reaction. Such discrepancy is possible because C(CH2OO)···O(H2O) interaction has been enhanced more obviously by H2O as compared to that of C(CH2OO)···O(H2S) interaction.
Role of Structure Scalars on the evolution of Compact Objects in Palatini $f(R)$ Gravity
Creators: name: Bhatti, M. Z.
name: Yousaf, Z.
name: Tariq, Z.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The utmost concern of this article is the construction of modified scalar functions (structure scalars) by taking Palatini $f(R)$ gravitational theory into account. At first, a general formalism is established in which we assess gravitational stellar equations by putting into use the Palatini's technique. Later, from the perspective of tilted observer, we Lorentz boosted the components of energy-momentum tensor using relative velocity $ω$. To examine the physical as well as mathematical aspects of the fluid source, we carry out a detailed analysis of kinematical variables by evaluating shear tensor and scalar, four-acceleration and expansion scalar. For the fluid content inside our spherical star, we inferred the mass function (geometric mass) and the active gravitational mass. Raychaudhuri equation, Bianchi identities in addition to few other equations are worked out to discern the structure formation and analyze the object's evolutionary stages. The Riemann tensor is then broken up orthogonally to set up few scalar functions connected with fundamental physical characteristics of the fluid source like energy density, effects of tidal forces and anisotropic stresses etc.
description: 33 pages, version accepted for publications in Chinese Journal of Physics
Scenario of inflationary cosmology from the phenomenological $Λ$ models
Creators: name: Ray, Saibal
name: Ray, P. C.
name: Ghosh, Partha Pratim
name: Mukhopadhyay, Utpal
name: Chowdhury, Partha
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Choosing the three phenomenological models of the dynamical cosmological term $Λ$, viz., $Λ\sim (\dot a/a)^2$, $Λ\sim {\ddot a/a}$ and $Λ\sim ρ$ where $a$ is the cosmic scale factor, it has been shown by the method of numerical analysis that the three models are equivalent for the flat Universe $k=0$. The evolution plots for dynamical cosmological term $Λ$ vs. time $t$ and also the cosmic scale factor $a$ vs. $t$ are drawn here for $k=0, +1$. A qualitative analysis has been made from the plots which supports the idea of inflation and hence expanding Universe.
description: 12 latex pages with 12 figures; Replaced with the revised version; Accepeted for `J. Non-lin. Frac. Phen. Sci. Engg.'
Wavelength sensitivity of the speckle patterns produced by an integrating sphere
Creators: name: Facchin, Morgan
name: Dholakia, Kishan
name: Bruce, Graham D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Speckle metrology is a powerful tool in the measurement of wavelength and spectra. Recently, speckle produced by multiple reflections inside an integrating sphere has been proposed and showed high performance. However, to our knowledge, a complete characterisation of speckle sensitivity to wavelength in that geometry has not been performed to date. In this work, we derive a general model predicting the variation in a speckle pattern as a result of a generic transformation. Applying this to a shift in the incident wavelength, we show that the speckle sensitivity is mainly governed by the radius and surface reflectivity of the sphere. We show that integrating spheres offer sensitivity three orders of magnitude above that of multimode fibres of a similar size, and discuss analogies with the transmission line of a Fabry-Pérot interferometer.
description: 7 pages, 4 figures
An Analytical Approach to the Universal Wave Function and its Gravitational Effect
Creators: name: Xiong, Yunuo
name: Xiong, Hongwei
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Based on quantum origin of the universe, in this article we find that the universal wave function can be far richer than the superposition of many classical worlds studied by Everett. By analyzing the more general universal wave function and its unitary evolutions, we find that on small scale we can obtain Newton's law of universal gravity, while on the scale of galaxies we naturally derive gravitational effects corresponding to dark matter, without modifying any physical principles or hypothesizing the existence of new elementary particles. We find that an auxiliary function having formal symmetry is very useful to predict the evolution of the classical information in the universal wave function.
description: 17 pages
Economic analysis of risk to goods in transit
Creators: name: Anderson, Harold Andreas
Publisher: name: University of British Columbia
Year: 2010

description: The rules governing risk to goods in transit contained in the British Columbia Sale of Goods Act are based on a statute enacted in 1893. Although the method of transport as well as the types of goods being transported have changed significantly since that time, the rules have not been modified. The hypothesis explored in this thesis is whether rules governing risk to goods in transit drafted in the late nineteenth century represent efficient rules in the late twentieth century. The thesis applied economic analysis to the rules to test their efficiency. The rules were tested in the ocean transit environment. It was concluded that the rules were not efficient and required substantial modification. An efficient set of rules governing risk to goods in transit was advanced.
Feedback Linearization for Quadrotors with a Learned Acceleration Error Model
Creators: name: Spitzer, Alexander
name: Michael, Nathan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper enhances the feedback linearization controller for multirotors with a learned acceleration error model and a thrust input delay mitigation model. Feedback linearization controllers are theoretically appealing but their performance suffers on real systems, where the true system does not match the known system model. We take a step in reducing these robustness issues by learning an acceleration error model, applying this model in the position controller, and further propagating it forward to the attitude controller. We show how this approach improves performance over the standard feedback linearization controller in the presence of unmodeled dynamics and repeatable external disturbances in both simulation and hardware experiments. We also show that our thrust control input delay model improves the step response on hardware systems.
description: Accepted at ICRA 2021
On the zeros of functions in the Selberg class
Creators: name: Mukhopadhyay, Anirban
name: Srinivas, Kotyada
name: Rajkumar, Krishnan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11E45

description: It is proved that under some suitable conditions, the degree two functions in the Selberg class have infinitely many zeros on the critical line.
description: 9 pages
CLPVG: Circular limited penetrable visibility graph as a new network model for time series
Creators: name: Xuan, Qi
name: Zhou, Jinchao
name: Qiu, Kunfeng
name: Xu, Dongwei
name: Zheng, Shilian
name: Yang, Xiaoniu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Visibility Graph (VG) transforms time series into graphs, facilitating signal processing by advanced graph data mining algorithms. In this paper, based on the classic Limited Penetrable Visibility Graph (LPVG) method, we propose a novel nonlinear mapping method named Circular Limited Penetrable Visibility Graph (CLPVG). The testing on degree distribution and clustering coefficient on the generated graphs of typical time series validates that our CLPVG is able to effectively capture the important features of time series and has better anti-noise ability than traditional LPVG. The experiments on real-world time-series datasets of radio signal and electroencephalogram (EEG) also suggest that the structural features provided by CLPVG, rather than LPVG, are more useful for time-series classification, leading to higher accuracy. And this classification performance can be further enhanced through structural feature expansion by adopting Subgraph Networks (SGN). All of these results validate the effectiveness of our CLPVG model.
description: 9 pages, 9 figures
Dynamical correlation energy of metals in large basis sets from downfolding and composite approaches
Creators: name: Callahan, James M.
name: Lange, Malte F.
name: Berkelbach, Timothy C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Coupled-cluster theory with single and double excitations (CCSD) is a promising ab initio method for the electronic structure of three-dimensional metals, for which second-order perturbation theory (MP2) diverges in the thermodynamic limit. However, due to the high cost and poor convergence of CCSD with respect to basis size, applying CCSD to periodic systems often leads to large basis set errors. In a common "composite" method, MP2 is used to recover the missing dynamical correlation energy through a focal-point correction, but the inadequacy of MP2 for metals raises questions about this approach. Here we describe how high-energy excitations treated by MP2 can be "downfolded" into a low-energy active space to be treated by CCSD. Comparing how the composite and downfolding approaches perform for the uniform electron gas, we find that the latter converges more quickly with respect to the basis set size. Nonetheless, the composite approach is surprisingly accurate because it removes the problematic MP2 treatment of double excitations near the Fermi surface. Using the method to estimate the CCSD correlation energy in the combined complete basis set and thermodynamic limits, we find CCSD recovers over 90% of the exact correlation energy at $r_s=4$. We also test the composite and downfolding approaches with the random-phase approximation used in place of MP2, yielding a method that is more effective but more expensive.
description: 7 pages, 4 figures