cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
THE ESSENCE OF STUDENT-CENTRED APPROACH IN ORGANIZATION OF EDUCATIONAL PROCESS IN COUNTRIES OF THE WORLD
Creators: name: Garlitska, N.
name: Zahrychuk, H.
Publisher: name: Sciences of Europe
Year: 2021
Subjects: student-centred learning
higher education
pedagogical innovation
developing countries.

description: The article highlights main features of the implementation of student-centred approach in the construction of educational process in countries of the world. There are described international teaching practices that engrain of teaching and learning which focused on students. The experience of foreign universities has presented involving students in the scientific and educational process for improvement student-centred learning.
Richardson extrapolation allows truncation of higher order digital nets and sequences
Creators: name: Goda, Takashi
Publisher: name: arXiv
Year: 2018
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We study numerical integration of smooth functions defined over the $s$-dimensional unit cube. A recent work by Dick et al. (2019) has introduced so-called extrapolated polynomial lattice rules, which achieve the almost optimal rate of convergence for numerical integration and can be constructed by the fast component-by-component search algorithm with smaller computational costs as compared to interlaced polynomial lattice rules. In this paper we prove that, instead of polynomial lattice point sets, truncated higher order digital nets and sequences can be used within the same algorithmic framework to explicitly construct good quadrature rules achieving the almost optimal rate of convergence. The major advantage of our new approach compared to original higher order digital nets is that we can significantly reduce the precision of points, i.e., the number of digits necessary to describe each quadrature node. This finding has a practically useful implication when either the number of points or the smoothness parameter is so large that original higher order digital nets require more than the available finite-precision floating point representations.
Neutral-naturalness from a holographic SO(6)/SO(5) composite Higgs model
Creators: name: Dillon, Barry M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study a holographic realisation of a composite Higgs model with an SO(6)/SO(5) symmetry breaking coset in which the top sector includes colour-neutral twin-partners that reduce the sensitivity of the Higgs mass to the cut-off. Key to this neutral-naturalness mechanism is a Z2 symmetry that leaves the Yukawa couplings to the Higgs boson invariant under an exchange of the top quark and twin top quark, but the symmetry structure of the model means that the Z2 symmetry is not present in the gauge boson couplings to the Higgs. Within the calculable framework of holography we construct and study the Higgs potential. We examine the relation between the Higgs mass, top-partner spectra, and the input parameters, finding that the presence of the twin-partners pushes the masses of the lightest coloured top-partners up to approximately 1500 GeV while the decay constant remains at approximately 700 GeV. Interestingly, no additional Z2 breaking terms are required to reproduce the observed masses of the electroweak gauge bosons, Higgs boson, and top quark.
description: Published version, references added. An extended discussion on 5D anomalies added, along with discussions on the Z2 breaking and phenomenology
Do Small-Scale Dark Matter Fluctuations Govern the Fragmentation of Primordial Gas?
Creators: name: Bromm, Volker
name: Coppi, Paolo
name: Larson, Richard
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In order to constrain the initial mass function of the first generation of stars (Population III), one has to study the fragmentation properties of primordial gas. We present results from 3D simulations, based on Smoothed Particle Hydrodynamics, which explore the idea that small-scale fluctuations in the (cold) dark matter recreate a filamentary and clumpy structure in the gas component on scales smaller than the initial Jeans mass, where all primordial fluctuations would have been wiped out.
description: 4 pages, 2 eps figures, uses aipproc.sty to appear in Proceedings: After the Dark Ages, 9th October conference
Effects of the partial substitution of soybean meal with single cell proteins meal (Torula yeast Candida utilis ) on growth performance, occurrence of footpad dermatitis and breast meat quality traits of broiler chickens
Creators: name: ZAMPIGA, MARCO
name: Soglia, F
name: Piscitelli, R
name: Petracci, M
name: SIRRI, FEDERICO
Publisher: name: Zenodo
Year: 2023

description: The growth of world population and the related increase in animal products demand are leading to a remarkable increment in annual worldfeed supply, strengthening the need to identify alternative, more sustainable protein ingredients The present study was carried out to evaluatethe effects of the dietary replacement of soybean meal ( with single cell proteins meal (from inactive Torula yeast Candida utilis SCP)during the grower and finisher phases on productive performance, occurrence of footpad dermatitis ( and breast meat quality traits ofbroiler chickens
title: ADCO, Grènetier de Cîteaux : comptes (1497-1504) (11 H 1172), f. 00446
Creators: name: de la Côte-d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CBMA/CG21/F.PETOT/2019
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: comptes
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge

description: Grènetier de Cîteaux : comptes (1497-1504), Archives départementales de la Côte-d'Or, (11 H 1172). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Grènetier de Cîteaux : comptes (1497-1504), Archives départementales de la Côte-d'Or, (11 H 1172), f. 00446, in Projet CBMA - Corpus Burgundiae Medii Aevi \[Ressource en ligne\], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
Model-Independent Measurement of the Primordial Power Spectrum
Creators: name: Wang, Yun
name: Spergel, David N.
name: Strauss, Michael A.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In inflationary models with minimal amount of gravity waves, the primordial power spectrum of density fluctuations, $A_S^2(k)$, together with the basic cosmological parameters, completely specify the predictions for the cosmic microwave background (CMB) anisotropy and large scale structure. Here we show how we can strongly constrain both $A_S^2(k)$ and the cosmological parameters by combining the data from the Microwave Anisotropy Probe (MAP) and the galaxy redshift survey from the Sloan Digital Sky Survey (SDSS). We allow $A_S^2(k)$ to be a free function, and thus probe features in the primordial power spectrum on all scales. MAP and SDSS have scale-dependent measurement errors that decrease in opposite directions on astrophysically interesting scales; they complement each other and allow the measurement of the primordial power spectrum independent of inflationary models, giving us valuable information on physics in the early Universe, and providing clues to the correct inflationary model.
description: 4 pages including 4 figures. To appear in "Particle Physics and the Early Universe (COSMO-98)", editor David O. Caldwell (American Institute of Physics)
The dg Leavitt algebra, singular Yoneda category and singularity category
Creators: name: Chen, Xiao-Wu
name: Keller, Bernhard
name: Wang, Yu
name: Wang, Zhengfang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Representation Theory (math.RT)
subject: Category Theory (math.CT)
subject: K-Theory and Homology (math.KT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: For any finite dimensional algebra $Λ$ given by a quiver with relations, we prove that its dg singularity category is quasi-equivalent to the perfect dg derived category of a dg Leavitt path algebra. The result might be viewed as a deformed version of the known description of the dg singularity category of a radical-square-zero algebra in terms of a Leavitt path algebra with trivial differential.
 The above result is achieved in two steps. We first introduce the singular Yoneda dg category of $Λ$, which is quasi-equivalent to the dg singularity category of $Λ$. The construction of this new dg category follows from a general operation for dg categories, namely an explicit dg localization inverting a natural transformation from the identity functor to a dg endofunctor. This localization turns out to be quasi-equivalent to a dg quotient category. Secondly, we prove that the endomorphism algebra of the quotient of $Λ$ modulo its Jacobson radical in the singular Yoneda dg category is isomorphic to the dg Leavitt path algebra. The appendix is devoted to an alternative proof of the result using Koszul-Moore duality and derived localizations.
description: Appendix by Bernhard Keller and Yu Wang, v2 some changes in exposition, 51 pages
Decomposing the Tube Category
Creators: name: Hardiman, Leonard
name: King, Alastair
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Algebra (math.QA)
subject: Category Theory (math.CT)
subject: FOS: Mathematics
subject: 18D10

description: The tube category of a modular tensor category is a variant of the tube algebra, first introduced by Ocneanu. As a category, it can be decomposed in two different, but related, senses. Firstly, via the Yoneda embedding, the Hom spaces decompose into summands factoring though irreducible functors, in a manner analogous to decomposing an algebra as a sum of matrix algebras. We describe these summands. Secondly, under the Yoneda embedding, each object decomposes into irreducibles, which correspond to primitive idempotents in the category itself. We identify these idempotents. We make extensive use of diagram calculus in the description and proof of these decompositions.
description: 17 pages; v2: fixed typos; v3: made multiple minor changes that were suggested during the refereeing process
Sgr A* ``Visual Binaries'': A Direct Measurement of the Galactocentric Distance
Creators: name: Salim, Samir
name: Gould, Andrew
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new geometrical method for measuring the distance to the Galactic center (R_0) by solving for the Keplerian orbit of individual stars bound to the black hole associated with the Sgr A* from radial velocity and proper motion measurements. We identify three stars to which the method may be applied, and show that 1-5 % accuracy of R_0 can be expected after 15 years of observing, and 0.5-2 % after 30 years of observing, depending on what the orbital parameters of these three stars turn out to be. Combining the measurements of the three stars with favorable orbital parameters leads to even more precise values. In the example that we present, such combined solution yields 4 % accuracy already by the year 2002. All these estimates assume that annual position measurements will continue to be made with the 2 mas precision recently reported by Ghez et al. The precision of the distance measurement is relatively insensitive to the radial velocity errors, provided that the latter are less than 50 km/s. Besides potentially giving an estimate of R_0 that is better than any currently in use, the greatest advantage of this method is that it is free from systematic errors.
description: Submitted to ApJ, 14 pages, 8 figures
Sensor array processing: localisation of wireless sources
Creators: name: Fang, Zexi
Publisher: name: Imperial College London
Year: 2017

description: In this thesis, various subspace array processing techniques for wireless source localisation are presented and investigated in the following three aspects. First, in the environment of indoor optical wireless communications, the paths of different sources and/or from different reflectors may impinge on the receiver from closely spaced directions with a high probability. In this case, the ranges of the paths, together with their directions, are important especially for isolating the desired source from the interferers. A blind multi-source localisation approach, which can be used as a channel estimator in the receiver of a communication system, is proposed for direction, range, and path gain estimation. Utilising the above channel parameter estimates, two subspace multibeam beamformers are also presented to achieve complete interference cancellation. Second, in applications such as wireless sensor networks and ubiquitous computing, both the location and orientation of an array are important parameters of interest to be estimated. Hence, array localisation and orientation estimation approaches are proposed for two cases. In the first case, a number of sources of known locations are employed to estimate these parameters of a receiver array. In the second case, a receiver array is utilised to estimate these parameters of multiple sources with each one being a transmitter array. Last, when sources operate in the near field of an array, the spherical wave propagation model needs to be considered. A problem associated with such a scenario is source localisation under the wideband assumption, where the wavefront of a baseband signal varies when traversing through the sensors of the array. Two novel approaches with the employment of the subcovariance of the received signal and the rotation of the array reference point are proposed to localise multiple sources under the wideband assumption. Throughout the thesis, computer simulation studies are presented for evaluating the performance of the proposed approaches.
Discovery of a Magnetic White Dwarf in the Symbiotic Binary Z Andromedae
Creators: name: Sokoloski, J. L.
name: Bildsten, Lars
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the first result from our survey of rapid variability in symbiotic binaries: the discovery of a persistent oscillation at P=1682.6 +- 0.6 s in the optical emission from the prototype symbiotic, Z Andromedae. The oscillation was detected on all 8 occasions on which the source was observed over a timespan of nearly a year, making it the first such persistent periodic pulse found in a symbiotic binary. The amplitude was typically 2 - 5 mmag, and it was correlated with the optical brightness during a relatively small outburst of the system. The most natural explanation is that the oscillation arises from the rotation of an accreting, magnetic (B_S > 10^5 G) white dwarf. This discovery constrains the outburst mechanisms, since the oscillation emission region near the surface of the white dwarf was visible during the outburst.
description: Accepted for publication in the Astrophysical Journal (6 pages, including 4 figures), LaTeX
Інструкція з користування сервісом Cited-by від CrossRef для редакцій наукових журналів
Creators: name: Kolesnykova, Tetyana
name: D. Solovianenko
name: Savelieva, Olena
Publisher: name: figshare
Year: 2018
Subjects: subject: Library and Information Studies
subject: FOS: Media and communications

description: UK: Представлено покрокові дії із користування сервісом Cited-by від CrossRef для редакцій наукових журналів. Присвоєння DOI для кожної статті в науковому журналі є необхідною умовою його відповідності міжнародним стандартам. Сервіс Cited-by, використовуючи наявність DOI в різних наукових документах (статтях, монографіях та ін,) допомагає видавцям дізнатися, хто цитує їх контент, відображає лічильники і посилається на цитований контент. При складанні Інструкції використано досвід роботи редакції журналу «Наука та прогрес транспорту». Видання журналу на прикладі кращих світових практик Library Publishing підтримується науково-технічною бібліотекою Дніпровського національного університету залізничного транспорту імені академіка В. Лазаряна.
RU: Представлены пошаговые действия по пользованию сервисом Cited-by от CrossRef для редакций научных журналов. Присвоение DOI для каждой статьи в научном журнале является необходимым условием его соответствия международным стандартам. Сервис Cited-by, используя наличие DOI в различных научных документах (статьях, монографиях и др,) помогает издателям узнать, кто цитирует их контент, отражает счетчики и ссылается на цитируемый контент. При составлении Инструкции использован опыт работы редакции журнала «Наука та прогрес транспорту». Издание журнала на примере лучших мировых практик Library Publishing поддерживается научно-технической библиотекой Днипровского национального университета железнодорожного транспорта имени академика В. Лазаряна.
EN: The Instruction presents step-by-step actions on the use of Crossref’s Cited-by Service for editorial boards of scientific journals. The assignment of a DOI for each article in a scientific journal is a prerequisite for its compliance with international standards. The Cited-by Service, using DOI in various scientific documents (articles, monographs, etc.) helps publishers find out who is citing their contents, display the counts, and links to the citing content. The Instructions incorporated the experience of the editorial board of the journal "Science and Transport Progress". The publication of the journal in the context of the best world Library Publication practices is supported by the Scientific and Technical Library of Dnipro National University of Railway Transport named after Academician V. Lazaryan.
Recalling Extra Data: A Replication Study of Finding Missing Markets
Creators: name: Wood, Benjamin D. K.
name: Dong, Michell
Publisher: name: Taylor & Francis
Year: 2018
Subjects: Cell Biology
Cancer
Science Policy

description: We re-examine some of the strongest evidence supporting agricultural commercialisation, a highly touted yet under-researched development intervention. Our replication study re-examines Ashraf, Giné, and Karlan’s ‘Finding Missing Markets’ paper. Using the previous paper’s raw data, our research generally reproduces the original findings. We explore the evaluation’s theory of change, focusing on the result that first time export crop adopters benefit more from agricultural commercialisation than previous adopters. We also examine recall bias questions and provide sample size guidance for future researchers. Similar to the original paper, we find that the intervention mostly benefits households just entering the agricultural production value-chain.
Instantaneous braids and Dehn twists in topologically ordered states
Creators: name: Zhu, Guanyu
name: Lavasani, Ali
name: Barkeshli, Maissam
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A defining feature of topologically ordered states of matter is the existence of locally indistinguishable states on spaces with non-trivial topology. These degenerate states form a representation of the mapping class group (MCG) of the space, which is generated by braids of defects or anyons, and by Dehn twists along non-contractible cycles. These operations can be viewed as fault-tolerant logical gates in the context of topological quantum error correcting codes and topological quantum computation. Here we show that braids and Dehn twists can in general be implemented by a constant depth quantum circuit, with a depth that is independent of code distance $d$ and system size. The circuit consists of a constant depth local quantum circuit (LQC) implementing a local geometry deformation of the quantum state, followed by a permutation on (relabelling of) the qubits. The permutation requires permuting qubits that are separated by a distance of order $d$; it can be implemented by collective classical motion of mobile qubits or as a constant depth circuit using long-range SWAP operations (with a range set by $d$) on immobile qubits. Applying these results to certain non-Abelian quantum error correcting codes demonstrates how universal logical gate sets can be implemented on encoded qubits using only constant depth unitary circuits.
description: 45 pages, 41 figures. Added sections (including a new figure) discussing about fault tolerance and time overhead due to decoding. Abstract, introduction and summary updated
New slow wave structures for travelling wave tubes
Creators: name: Hazell, Jonathan
Publisher: name: Imperial College London
Year: 2017

description: This thesis covers the design of slow wave structures for travelling wave tubes, with a specific focus on those that could be used for operation at millimetre or shorter wavelengths. Serpentine and a coupled cavity photonic crystal structure are covered in detail, together with the interaction between the electromagnetic waves they support and the electron gun and magnetic beam focusing systems needed for a travelling wave interaction. In Chapter 2, the existing small-signal theory of the travelling wave interaction is introduced and applied to a serpentine travelling wave tube. A set of synthesis equations for the serpentine structure are then derived from the analysis and verified with simulation. In Chapter 3, possible improvements to the serpentine structure for high frequency operation, and operation on harmonics other than the fundamental (for both the phase and the interaction impedance) are considered. From the investigation it can be concluded that higher harmonics allow a larger beam current than the fundamental. In Chapter 4, slow wave structures based on photonic crystals are proposed for use in travelling wave tubes. A specific photonic crystal arrangement – the coupled resonator optical waveguide (CROW) - that does not appear to have been studied previously in this application is then investigated. The conclusion is that a CROW is suitable for use in a travelling wave tube and is significantly more manufacturable than existing approaches. In Chapter 5, the design of a full electron beam system for use with both the original and the improved slow wave structures is presented. The design of an electron gun, cathode and collimating magnet using an immersed flow insertion are all covered in detail. In Chapter 6, conclusions are drawn and avenues for possible future work are presented.
n-Qubit Operations on Sphere and Queueing Scaling Limits for Programmable Quantum Computer
Creators: name: Dai, Wanyang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Emerging Technologies (cs.ET)
subject: Information Theory (cs.IT)
subject: Performance (cs.PF)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We study n-qubit operation rules on (n+1)-sphere with the target to help developing a (photon or other technique) based programmable quantum computer. In the meanwhile, we derive the scaling limits (called reflecting Gaussian random fields on a (n+1)-sphere) for n-qubit quantum computer based queueing systems under two different heavy traffic regimes. The queueing systems are with multiple classes of users and batch quantum random walks over the $(n+1)$-sphere as arrival inputs. In the first regime, the qubit number $n$ is fixed and the scaling is in terms of both time and space. Under this regime, performance modeling during deriving the scaling limit in terms of balancing the arrival and service rates under first-in first-out and work conserving service policy is conducted. In the second regime, besides the time and space scaling parameters, the qubit number $n$ itself is also considered as a varying scaling parameter with the additional aim to find a suitable number of qubits for the design of a quantum computer. This regime is in contrast to the well-known Halfin-Whitt regime.
description: 24 pages, 4 figures
Transfer Learning for Related Reinforcement Learning Tasks via Image-to-Image Translation
Creators: name: Gamrian, Shani
name: Goldberg, Yoav
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Despite the remarkable success of Deep RL in learning control policies from raw pixels, the resulting models do not generalize. We demonstrate that a trained agent fails completely when facing small visual changes, and that fine-tuning---the common transfer learning paradigm---fails to adapt to these changes, to the extent that it is faster to re-train the model from scratch. We show that by separating the visual transfer task from the control policy we achieve substantially better sample efficiency and transfer behavior, allowing an agent trained on the source task to transfer well to the target tasks. The visual mapping from the target to the source domain is performed using unaligned GANs, resulting in a control policy that can be further improved using imitation learning from imperfect demonstrations. We demonstrate the approach on synthetic visual variants of the Breakout game, as well as on transfer between subsequent levels of Road Fighter, a Nintendo car-driving game. A visualization of our approach can be seen in https://youtu.be/4mnkzYyXMn4 and https://youtu.be/KCGTrQi6Ogo .
description: Proceedings of the 36th International Conference on Machine Learning (ICML 2019)
Investigating the Metal Line Systems at Z=1.9 toward J2233-606 in the HDF-S
Creators: name: Prochaska, Jason X.
name: Burles, Scott M.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The combination of STIS and optical spectroscopy with STIS imaging of the field surrounding J2233-606 afford a unique opportunity to study the physical nature of the Quasar Absorption Line systems. We present an analysis of the ionization state, chemical abundances, and kinematic characteristics of two metal-line systems at z=1.92 and z=1.94 toward J2233-606. We focus on these two systems because (i) the observations provide full coverage of the Lyman series, hence an accurate determination of their HI column densities and (ii) the metal-line transitions allow a measurement of their ionization state. Line-profile fits of the Lyman series for the two systems indicate log N(HI) = 17.15 \pm 0.02 cm^-2 evenly distributed between two components for the z=1.92 system and log N(HI) = 16.33 \pm 0.04 cm^-2 for the z=1.94 system. By comparing observed ionic ratios of C and Si against calculations performed with the CLOUDY software package, we find the ionization state is high and well constrained in both systems. Applying ionization corrections to the measured ionic column densities, we determine that the systems exhibit significantly different metallicities: ~ 1/50 solar and < 1/200 solar for the two components of z=1.92 and ~40% solar at z=1.94. The properties of the z=1.92 system are consistent with a low metallicity galaxy (e.g. a dwarf galaxy) as well as absorption by large scale structure of the IGM. On the other hand, the high metallicity of the z=1.94 system suggests significant star formation and is therefore most likely associated with a galactic system. Furthermore, we predict it is the most likely to be observed with the STIS imaging and follow-up observations. If a galaxy is identified, our results provide direct measurements on the properties of the ISM for a z~2 galaxy.
description: 9 pages, 6 encapsulated figures, LaTeX2e, uses emulateapj.sty and onecolfloat.sty (included). Submitted to the Astronomical Journal
Empirical measures and random walks on compact spaces in the quadratic Wasserstein metric
Creators: name: Borda, Bence
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60B05, 60B15, 60G10, 49Q22

description: Estimating the rate of convergence of the empirical measure of an i.i.d. sample to the reference measure is a classical problem in probability theory. Extending recent results of Ambrosio, Stra and Trevisan on 2-dimensional manifolds, in this paper we prove sharp asymptotic and nonasymptotic upper bounds for the mean rate in the quadratic Wasserstein metric $W_2$ on a $d$-dimensional compact Riemannian manifold. Under a smoothness assumption on the reference measure, our bounds match the classical rate in the optimal matching problem on the unit cube due to Ajtai, Komlós, Tusnády and Talagrand. The i.i.d. condition is relaxed to stationary samples with a mixing condition. As an example of a nonstationary sample, we also consider the empirical measure of a random walk on a compact Lie group. Surprisingly, on semisimple groups random walks attain almost optimal rates even without a spectral gap assumption. The proofs are based on Fourier analysis, and in particular on a Berry-Esseen smoothing inequality for $W_2$ on compact manifolds, a result of independent interest with a wide range of applications.
description: 28 pages
title: Avant-propos_Guide de l'amateur d'escrime
Creators: name: AmateurS
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2021

description: Avant-propos
description: ID_PARA_01097
3-Phase Evolution of a Coronal Hole, Part II: The Magnetic Field
Creators: name: Heinemann, S. G.
name: Hofmeister, S. J.
name: Veronig, A. M.
name: Temmer, M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the magnetic characteristics of a persistent coronal hole (CH) extracted from EUV imagery using HMI filtergrams over the timerange February 2012-October 2012. The magnetic field, its distribution as well as the magnetic fine structure in form of flux tubes (FT) are analyzed in different evolutionary states of the CH. We find a strong linear correlation between the magnetic properties (e.g. signed/unsigned magnetic field strength) and area of the CH. As such, the evolutionary pattern in the magnetic field clearly follows the three-phase evolution (growing, maximum and decaying phase) as found from EUV data (Part I). This evolutionary process is most likely driven by strong FTs with a mean magnetic field strength exceeding 50 G. During the maximum phase they entail up to 72% of the total signed magnetic flux of the CH, but only cover up to 3.9% of the total CH area, whereas during the growing and decaying phase, strong FTs entail 54-60% of the signed magnetic flux and cover around 1-2% of the CHs total area. We conclude that small scale-structures of strong unipolar magnetic field are the fundamental building blocks of a CH and govern its evolution.
description: under revision for ApJ
Unravelling Social Network Usage Patterns: A study based on unsupervised learning
Creators: name: Alpuente, Alfredo Zarco
Publisher: name: OSF Registries
Year: 2024
Subjects: subject: Psychiatry and Psychology
subject: Medicine and Health Sciences
subject: Behavioral addictions
subject: Latent Class Analysis
subject: Social Network

description: The aim of the present study are to explore the profiles of social network (SN) users and contrast the differences between these groups in relevant variables that scientific literature has shown to influence PSNU.
Specifically, we want to explore user profiles of SN in a sample of the general population. Subsequently, to assess the validity of the formed groups, it aims to contrast the differences between these groups in relevant variables that scientific literature has shown to influence PSNU, such as impulsivity, emotional intelligence, empathy, and aggression.
Microlocal analysis of borehole seismic data
Creators: name: Felea, Raluca
name: Gaburro, Romina
name: Greenleaf, Allan
name: Nolan, Clifford
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: Borehole seismic data is obtained by receivers located in a well, with sources located on the surface or in another well. Using microlocal analysis, we study possible approximate reconstruction via linearized, filtered backprojection of an isotropic sound speed in the subsurface for three types of data sets. The sources may form a dense array on the surface, or be located along a line on the surface (walkaway geometry) or in another borehole (crosswell). We show that for the dense array, reconstruction is feasible, with no artifacts in the absence of caustics in the background ray geometry, and mild artifacts in the presence of fold caustics in a sense that we define. In contrast, the walkaway and crosswell data sets both give rise to strong, nonremovable artifacts.
description: 35 pages, 2 figures
ASCA Observations of GRO J1744-28
Creators: name: Nishiuchi, M.
name: Koyama, K.
name: Maeda, Y.
name: Asai, K.
name: Dotani, T.
name: Inoue, H.
name: Mitsuda, K.
name: Nagase, F.
name: Ueda, Y.
name: Kouveliotou, C.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the ASCA results of the bursting X-ray pulsar \gro, which was observed in February 1996 and March 1997. The source flux in the 2--10 keV band was $2.0\times10^{-8}$ erg/sec/cm$^2$ in 1996 and $5.0\times10^{-9}$ erg/sec/cm$^2$ in 1997. We detected 12 and 17 Type II bursts during the two observations with mean bursting intervals of about 27 min and 37 min. Each burst is followed by an intensity dip with the depleted flux depending on the burst fluence. The energy spectra are approximated by an absorbed power law with additional structure around 6--7 keV\@. Constant absorption column, $(5-6)\times10^{22}$ cm$^{-2}$, independent of the observation dates and emission phases (persistent, burst and dip) is interpreted as an interstellar absorption. The source may be actually located near the Galactic center, at a distance of 8.5 kpc. The structure in the energy spectrum at 6--7 keV is most probably due to iron and maybe reproduced by a disk line model with additional broadening mechanism.
description: 28 pages 11 figures. ApJ accepted
Role of local short-scale correlations in the mechanism of negative magnetization
Creators: name: Tripathi, M.
name: Chatterji, T.
name: Fischer, H. E.
name: Raghunathan, R.
name: Majumder, S.
name: Choudhary, R. J.
name: Phase, D. M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We elaborate here why the antiferromagnetically ordered GdCrO$_3$ responds in a diamagnetic way under certain conditions, by monitoring the evolution of the microscopic global and local magnetic phases. Using high energy $\sim$ 0.3 eV neutrons, the magnetic ordering is shown to adopt three distinct magnetic phases at different temperatures: G$_x^{Cr}$,A$_y^{Cr}$,F$_z^{Cr}$ below Néel temperature = 171 K; (F$_x^{Cr}$, C$_y^{Cr}$, G$_z^{Cr}$)$\bullet$( F$_x$$^{Gd}$,C$_y$$^{Gd}$) below 7 K and an intermediate phase for 7 K $ \le T \le$ 20 K in the vicinity of spin-reorientation phase transition. Although, bulk magnetometry reveals a huge negative magnetization (NM) in the terms of both magnitude and temperature range ( $M_{- max}$ ( 18 K)$\sim$ 35 $\times M_{+ max}$ (161 K), $ΔT \sim 110$ K in presence of $μ_0H$ = 0.01 T); the long-range magnetic structure and derived ordered moments are unable to explain the NM. Real-space analysis of the total (Bragg's + diffuse) scattering reveals significant magnetic correlations extending up to $\sim$ 9 $Å$. Accounting for these short-range correlations with a spin model reveals spin frustration in the S= 3 ground state, comprising competing first, second and third next nearest exchange interactions with values J$_1$ = 2.3 K, J$_2$ = -1.66 K and J$_3$ = 2.19 K in presence of internal field, governs the observance of NM in GdCrO$_{3}$.
description: 11 pages, 8 figures
Development of new on-board battery diagnosis/prognosis tools for extending lifetime and mitigating failure
Creators: name: Merla, Yu
Publisher: name: Imperial College London
Year: 2017

description: Lithium-ion batteries age over their lifetime of operation through various complex degradation mechanisms. In order to maximise battery performance and lifetime, the industrial standard method of measuring the state of health (SOH) by capacity and power fade is no longer good enough. In this thesis, Differential Thermal Voltammetry (DTV) is introduced as a new in-situ diagnosis/prognosis tool that is capable of a more sophisticated diagnosis of SOH, and is application ready with minimal installation costs. DTV uses only cell voltage and surface temperature measurements to infer detailed SOH information. The method was validated through various accelerated ageing experiments carried out on commercial lithium-ion pouch cells as well as through industrial collaborations. DTV was demonstrated for use as a diagnostic tool on a cell level for tracking battery degradation throughout its operation, for screening 2nd life batteries to estimate the degradation state/history, and for estimating the state-of-charge (SOC) of lithium iron phosphate cells during partial charge/discharges. In anticipation of an EV application, the technique was tested for its capabilities in a battery pack. DTV was able to correctly identify aged cells within a pack in a quantitative manner validating its capability embedded within a battery management system (BMS). Through an industrial collaboration, DTV demonstrated its use as a prognosis tool for forecasting cell failure in a commercial BMS mounted on a high-power battery pack used in a motorsport application. The concept of adaptive operation through DTV analysis was explored which resulted in a slower rate of degradation. Given the application opportunities validated through experiments, this research aims to provide an alternative tool for battery diagnosis/prognosis in a real-world application.
The Symmetry, Color and Morphology of Galaxies in the Hubble Deep Field
Creators: name: Conselice, Christopher J.
name: Bershady, Matthew A.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new method of utilizing the color and asymmetry values for galaxies in the Hubble Deep Field to determine both their morphological features and physical parameters. By using a color-asymmetry diagram, we show that various types of star-forming galaxies (e.g. irregular versus interacting, peculiar galaxies) can be distinguished in local samples. We apply the same methods to the F814W images of the Hubble Deep Field, and show preliminary results indicating that galaxy mergers and interactions are the dominate process responsible for creating asymmetries in the HDF galaxies.
description: 5 Pages with 1 figure; To appear in "After the Dark Ages: When Galaxies were Young", proceedings of the 9th annual October Astrophysics Conference, ed. S. Holt and E. Smith
The stimulant higenamine in weight loss and sports supplements
Creators: name: Cohen, Pieter A.
name: Travis, John C.
name: Keizers, Peter H. J.
name: Boyer, Frederick E.
name: Venhuis, Bastiaan J.
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine

description: Background: Higenamine is a stimulant with cardiovascular properties recently prohibited in sport by the World Anti-Doping Agency (WADA). Higenamine is also a natural constituent of several traditional botanical remedies and is listed as an ingredient in weight loss and sports supplements sold over-the-counter in the United States. Objectives: We analyzed dietary supplements available for sale in the United States prior to WADA’s prohibition of higenamine in sport for the presence and quantity of higenamine. Methods: All supplements labeled as containing higenamine or a synonym (i.e., norcoclaurine or demethylcoclaurine) available for sale in the United States were identified. For each brand, one sample was analyzed by NSF International (Ann Arbor, MI) and one sample by the Netherland’s National Institute for Public Health and the Environment (RIVM). NSF International carried out qualitative and quantitative analyses using ultra high performance liquid chromatography (UHPLC) with tandem mass spectrometry. RIVM carried out qualitative analysis using UHPLC quadrupole time of flight mass spectrometry for an independent confirmation of identity. Results: Twenty-four products were analyzed. The majority of supplements were marketed as either weight loss (11/24; 46%) or sports/energy supplements (11/24; 46%); two brands did not list a labeled indication. The quantity of higenamine (±95% CI) ranged from trace amounts to 62 ± 6.0 mg per serving. Consumers could be exposed to up to 110 ± 11 mg of higenamine per day when following recommended serving sizes provided on the label. Five products (5/24; 21%) listed an amount of higenamine, but none were accurately labeled; the quantity in these supplements ranged from <0.01% to 200% of the quantity listed on the label. Conclusion: Dosages of up to 62 ± 6.0 mg per serving of the stimulant higenamine were found in dietary supplements sold in the United States.
Free-Breathing Myocardial T1 Mapping using Inversion-Recovery Radial FLASH and Motion-Resolved Model-Based Reconstruction
Creators: name: Wang, Xiaoqing
name: Rosenzweig, Sebastian
name: Roeloffs, Volkert
name: Blumenthal, Moritz
name: Scholand, Nick
name: Tan, Zhengguo
name: Holme, H. Christian M.
name: Unterberg-Buchwald, Christina
name: Hinkel, Rabea
name: Uecker, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Purpose: To develop a free-breathing myocardial T1 mapping technique using inversion-recovery (IR) radial fast low-angle shot (FLASH) and calibrationless motion-resolved model-based reconstruction. Methods: Free-running (free-breathing, retrospective cardiac gating) IR radial FLASH is used for data acquisition at 3T. First, to reduce the waiting time between inversions, an analytical formula is derived that takes the incomplete T1 recovery into account for an accurate T1 calculation. Second, the respiratory motion signal is estimated from the k-space center of the contrast varying acquisition using an adapted singular spectrum analysis (SSA-FARY) technique. Third, a motion-resolved model-based reconstruction is used to estimate both parameter and coil sensitivity maps directly from the sorted k-space data. Thus, spatiotemporal total variation, in addition to the spatial sparsity constraints, can be directly applied to the parameter maps. Validations are performed on an experimental phantom, eleven human subjects, and a young landrace pig with myocardial infarction. Results: In comparison to an IR spin-echo reference, phantom results confirm good T1 accuracy when reducing the waiting time from five seconds to one second using the new correction. The motion-resolved model-based reconstruction further improves precision compared to the spatial regularization-only reconstruction. Aside from showing that a reliable respiratory motion signal can be estimated using modified SSA-FARY, in vivo studies demonstrate that dynamic myocardial T1 maps can be obtained within two minutes with good precision and repeatability. Conclusion: Motion-resolved myocardial T1 mapping during free-breathing with good accuracy, precision and repeatability can be achieved by combining inversion-recovery radial FLASH, self-gating and a calibrationless motion-resolved model-based reconstruction.
description: Part of this work has been presented at the ISMRM Annual Conference 2021 (Virtual), accepted by Magnetic Resonance in Medicine
3D printing of transition metal dichalcogenides
Creators: name: Grotta, Chiara
Publisher: name: Imperial College London
Year: 2018

description: The discovery of graphene initiated a surge of interest in other two-dimensional atomically thin materials. A class of materials that is attracting tremendous attention since 2011 is the family of layered transition metal dichalcogenides (TMDs), specifically group IV TMDs, namely MoS2, WS2, MoSe2 and WSe2. Their fascinating main characteristic is a varied electronic structure with layer number. This characteristic manifests as varied properties in their atomically thin form where they can be tuned to be direct band gap semi-conductors or electrically conductive, chemically stable, mechanically strong, flexible, catalytically and photo-catalytically active, and have very high specific surface area. All these properties make them very promising materials for applications in optoelectronics on flexible substrates, photonics, water splitting, and energy storage device electrodes. The objective of this thesis is the development of a scalable templating method to fabricate 3D architectures based on atomically thin layers of TMDs. We have chosen to utilize three-dimensional (3D) printing via robocasting (or direct ink writing) to fabricate 3D architectures of assembled 2D nanosheets. To this end, firstly we develop a liquid-phase exfoliation method of bulk TMDs which allows the achievement of nanosheets with lateral sizes greater than 1 micron in water with high yield. This lateral size is essential to achieve cohesive and mechanically stable 3D networks of 2D nanosheets and the use of water as dispersant agent is necessary to enable the scalability of the process. Secondly, we have formulated inks of exfoliated TMDs with the desirable rheological properties for printing, which are the shear thinning behaviour and high viscosity. 3D printed devices with footprint of mm2 and features in the hundreds of micrometre range have been successfully obtained based on exfoliated MoS2 and TiS2 nanosheets. Different architectures have been demonstrated, including woodpile and stacked and some of them have been tested as electrodes for supercapacitors. In proof of concept devices for electrochemical energy storage, they exhibit superior areal capacitance and energy density as compared to the existing planar microsupercapacitors, and enhanced performance to hybrid supercapacitor-battery devices. This work opens new directions towards additive manufacturability of 3D miniaturized devices with TMDs.