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  • Publication . Article . Preprint . Other literature type . 2020
    Open Access English
    Authors: 
    Mohit Gola; Florian M. Brunbauer; D. Janssens; A. Kumar; M. Lisowska; Hans Muller; Md. Naimuddin; Eraldo Oliveri; Dorothea Pfeiffer; L. Ropelewski; +4 more

    This work explores the use of multichannel readout electronics, already in use for quality assurance in gain uniformity studies, to measure the uniformity of the induction gap in Gas Electron Multipliers (GEM) based detectors. The devised procedure also provides a quali...

  • Publication . Article . Preprint . 2020
    Open Access English
    Authors: 
    Patrik Lundström; Johan Öinert;

    Let $R$ be a unital ring, let $E$ be a directed graph and recall that the Leavitt path algebra $L_R(E)$ carries a natural $\mathbb{Z}$-gradation. We show that $L_R(E)$ is strongly $\mathbb{Z}$-graded if and only if $E$ is row-finite, has no sink, and satisfies Condition...

  • Open Access English
    Authors: 
    Borynskyi, V. Yu.; Polishchuk, D. M.; Melnyk, A. K.; Kravets, A. F.; Tovstolytkin, A. I.; Korenivski, V.;

    We investigate spin dynamics in nanodisc arrays of synthetic-antiferromagnets (SAF) made of Py/NiCu/Py trilayers, where the NiCu spacer undergoes a Curie transition at about 200 K. The observed ferromagnetic resonance spectra have three distinct resonance modes at room ...

  • Publication . Article . Preprint . Conference object . 2021
    Open Access English
    Authors: 
    Safinianaini, Negar; Bostr��m, Henrik;
    Publisher: KTH, Programvaruteknik och datorsystem, SCS
    Country: Sweden

    Mixtures of Hidden Markov Models (MHMMs) are frequently used for clustering of sequential data. An important aspect of MHMMs, as of any clustering approach, is that they can be interpretable, allowing for novel insights to be gained from the data. However, without a pro...

  • Publication . Article . Preprint . Other literature type . 2021
    Open Access English
    Authors: 
    Mariia Sidorova; A. D. Semenov; Heinz-Wilhelm Hübers; Samuel Gyger; Stephan Steinhauer; Xiuhui Zhang; Andreas Schilling;
    Countries: Germany, Switzerland

    We report on the study of phonon properties and electron-phonon coupling in thin NbTiN films, which are intensively exploited in superconducting devices. Studied NbTiN films with thicknesses less than 10~nm are disordered with respect to electron transport, the Ioffe-Re...

  • Publication . Article . Preprint . 2017
    Open Access English
    Authors: 
    Volker Schomerus; Evgeny Sobko; Mikhail Isachenkov;
    Publisher: Springer
    Country: Germany
    Project: EC | EXQFT (335182), EC | GATIS (317089)

    Conformal blocks for correlation functions of tensor operators play an increasingly important role for the conformal bootstrap programme. We develop a universal approach to such spinning blocks through the harmonic analysis of certain bundles over a coset of the conform...

  • Publication . Article . Preprint . 2017
    Open Access English
    Authors: 
    Baykal, Cenk; Liebenwein, Lucas; Schwarting, Wilko;

    We present a novel coreset construction algorithm for solving classification tasks using Support Vector Machines (SVMs) in a computationally efficient manner. A coreset is a weighted subset of the original data points that provably approximates the original set. We show...

  • Publication . Preprint . Article . Conference object . 2018
    Open Access English
    Authors: 
    Antzela Kosta; Nikolaos Pappas; Anthony Ephremides; Vangelis Angelakis;

    We consider a cognitive shared access scheme consisting of a high priority primary node and a low priority network with $N$ secondary nodes accessing the spectrum. Assuming bursty traffic at the primary node, saturated queues at the secondary nodes, and multipacket rece...

  • Publication . Preprint . Article . 2020
    Open Access English
    Authors: 
    Nikolay Gromov; Fedor Levkovich-Maslyuk; Paul Ryan; Dmytro Volin;
    Publisher: Elsevier
    Country: France
    Project: EC | EXACTC (865075), ANR | PSL (ANR-10-IDEX-0001), ANR | ENS-ICFP (ANR-10-LABX-0010), UKRI | Fundamental Physics from ... (ST/P000258/1)

    Separation of variables (SoV) is an extremely efficient and elegant technique for analysing physical systems but its application to integrable spin chains was limited until recently to the simplest su(2) cases. In this paper we continue developing the SoV program for hi...

  • Open Access English
    Authors: 
    Matija Vidmar;

    For each of (i) arbitrary stochastic reset, (ii) deterministic reset with arbitrary period, (iii) reset at arbitrary constant rate, and then in the sense of either (a) first-order stochastic dominance or (b) expectation (i.e. for each of the six possible combinations of...