cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Lattice calculation of the heavy quark potential at non-zero temperature
Creators: name: Bazavov, A.
name: Burnier, Y.
name: Petreczky, P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculated the real and imaginary parts of the static quark anti-quark potential at T>0 in 2+1 flavor QCD using correlators of Wilson lines in Coulomb gauge and lattices with temporal extent N_tau=12. We find that the real part of the potential is larger than the singlet free energy but smaller than the zero temperature potential. The imaginary part of the potential is similar in size to the perturbative HTL result.
description: LaTeX, 4 pages, 3 figures, uses elsarticle.cls , proceedings of Hard Probes 2013, 3-8 November 2013 Stellenbosch, South Africa
Magnetic structures of non-cerium analogues of heavy-fermion Ce2RhIn8: case of Nd2RhIn8, Dy2RhIn8 and Er2RhIn8
Creators: name: Čermák, Petr
name: Javorský, Pavel
name: Kratochvílová, Marie
name: Pajskr, Karel
name: Ouladdiaf, Bachir
name: Lemée-Cailleau, Marie-Hélène
name: Rodriguez-Carvajal, Juan
name: Boehm, Martin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: R2RhIn8 compounds (space group P4/mmm, R is a rare-earth element) belong to a large group of structurally related tetragonal materials which involves several heavy-fermion superconductors based on Ce. We have succeeded to grow single crystals of compounds with Nd, Dy and Er and following our previous bulk measurements, we performed neutron-diffraction studies to determine their magnetic structures. The Laue diffraction experiment showed that the antiferromagnetic order below the Néel temperature is in all three compounds characterized by the propagation vector k = (1/2, 1/2, 1/2). The amplitude and direction of the magnetic moments, as well as the invariance symmetry of the magnetic structure, were determined by subsequent experiments using two- and four-circle diffractometers. The critical exponents were determined from the temperature dependence of the intensities below TN.
description: 10 pages, 7 figures, submitted to PRB
Quench dynamics of a disordered array of dissipative coupled cavities
Creators: name: Creatore, C.
name: Fazio, R.
name: Keeling, J.
name: Türeci, H. E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the mean-field dynamics of a system of interacting photons in an array of coupled cavities in presence of dissipation and disorder. We follow the evolution of on an initially prepared Fock state, and show how the interplay between dissipation and disorder affects the coherence properties of the cavity emission and that these properties can be used as signatures of the many-body phase of the whole array.
description: 8 pages, 10 figures, new reference added
Gap Sequence of Factors of Fibonacci Sequence
Creators: name: Huang, Yuke
name: Wen, Zhiying
Publisher: name: arXiv
Year: 2014
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Let w be a factor of Fibonacci sequence F=x_1x_2..., then it appears in the sequence infinitely many times. Let w_p be the p-th appearance of w and v_{w,p} be the gap between w_p and w_{p+1}. In this paper, we discuss the structure of the gap sequence {v_{w,p}}, we first introduce the singular kernel word sk(w) for any factor w of F and give a decomposition of w with respect to sk(w). Using the singular kernel and the decomposition, we prove the gap sequence {v_{w,p}} has exactly two different elements {v_{w,1},v_{w,2}} and determine the expressions of gaps completely, then we prove that the gap sequence over the alphabet {v_{w,1},v_{w,2}} is still a Fibonacci sequence. Finally, we introduce the spectrum for studying some typical combinatorial, using the results above, we determine completely the spectrums.
description: 20 pages
Editorial: Our Creative Selves
Creators: name: Gillaspy, Emma
name: Hunter, Anna
name: Withnell, Neil
name: Nerantzi, Chrissi
Publisher: name: PRISM: Casting New Light on Learning, Theory and Practice
Year: 2020

description: PRISM: Casting New Light on Learning, Theory and Practice, Vol 3 No 1 (2020): Our Creative Selves
Magnetic field-dependence of the basal-plane superconducting anisotropy in YBa2Cu4O8 from small-angle neutron scattering measurements of the vortex lattice
Creators: name: White, Jonathan S.
name: Bowell, Charlotte J.
name: Cameron, Alistair S.
name: Heslop, Richard W.
name: Mesot, Joël
name: Gavilano, Jorge L.
name: Strässle, Simon
name: Mächler, Lars
name: Khasanov, Rustem
name: Dewhurst, Charles D.
name: Karpinski, Janusz
name: Forgan, Edward M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report a study of the basal-plane anisotropy of the superfluid density in underdoped YBa$_{2}$Cu$_{4}$O$_{8}$ (Y124), showing the effects of both the CuO$_{2}$ planes and the fully occupied CuO chains. From small-angle neutron scattering measurements of the vortex lattice, we can infer the superconducting (SC) properties for a temperature ($T$) range $T=$ 1.5 K to $T_{\rm c}$ and magnetic induction $B$ from 0.1 to 6 T. We find that the superfluid density along \textbf{a} has a simple $d$-wave T-dependence. However, along \textbf{b} (the chain direction) the superfluid density falls much more rapidly with $T$ and also with increasing field. This strongly suggests the suppression of proximity-effect induced superconductivity in the CuO chains. In addition, our results do not support a common framework for the low field in-plane SC response in Y124 and related YBa$_{2}$Cu$_{3}$O$_{7}$, and also indicate that any magnetic field-induced charge-density-wave order in Y124 exists only for fields above 6 T.
description: 8 pages, accepted in Phys. Rev. B
A Study of the Variation of Geometry of Accretion Flows of Compact Objects through Timing and Spectral Analysis of Their Outbursts
Creators: name: Pal, Partha Sarathi
name: Chakrabarti, Sandip K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Temporal and spectral variations of black hole candidates during outbursts have been reported in several publications. It is well known that during an outburst, source becomes softer in first few days, and then returns to hard states after a few weeks or months. In the present paper, we show variation of Comptonization Efficiency (CE), defined to be the ratio of number of power-law photons and number of soft photons injected to into the Compton cloud, as a function of time in several outbursts. Since power-law photons are generated through inverse-Comptonization of the intercepted soft photons, CE is a measure of geometry of Compton cloud. Our investigation indicates that all outbursts start with a large CE and becomes very small after a few days, when the Compton cloud becomes small enough to intercept any significant number of soft photons. CE returns back to a larger value at the end of outburst. We show co-variation of count rates, frequency of quasi-periodic oscillations (QPOs), photon index and CE and establish a general trend of disk geometry variation during outbursts in all systems under consideration.a
description: 14 Pages, 7 figures
Thermal balance and photon-number quantization in layered structures
Creators: name: Partanen, Mikko
name: Häyrynen, Teppo
name: Oksanen, Jani
name: Tulkki, Jukka
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The quantization of the electromagnetic field in lossy and dispersive dielectric media has been widely studied during the last few decades. However, several aspects of energy transfer and its relation to consistently defining position-dependent ladder operators for the electromagnetic field in nonequilibrium conditions have partly escaped the attention. In this work we define the position-dependent ladder operators and an effective local photon-number operator that are consistent with the canonical commutation relations and use these concepts to describe the energy transfer and thermal balance in layered geometries. This approach results in a position-dependent photon-number concept that is simple and consistent with classical energy conservation arguments. The operators are formed by first calculating the vector potential operator using Green's function formalism and Langevin noise source operators related to the medium and its temperature, and then defining the corresponding position-dependent annihilation operator that is required to satisfy the canonical commutation relations in arbitrary geometry. Our results suggest that the effective photon number associated with the electric field is generally position dependent and enables a straightforward method to calculate the energy transfer rate between the field and the local medium. In particular, our results predict that the effective photon number in a vacuum cavity formed between two lossy material layers can oscillate as a function of the position suggesting that also the local field temperature oscillates. These oscillations are expected to be directly observable using relatively straightforward experimental setups in which the field-matter interaction is dominated by the coupling to the electric field.
Lattice Vibrational Modes and Phonon Thermal Conductivity of Monolayer MoS2
Creators: name: Cai, Yongqing
name: Lan, Jinghua
name: Zhang, Gang
name: Zhang, Yong-Wei
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The anharmonic behavior of phonons and intrinsic thermal conductivity associated with the Umklapp scattering in monolayer MoS2 sheet are investigated via first-principles calculations within the framework of density functional perturbation theory. In contrast to the negative Gruneissen parameter occurring in low frequency modes in graphene, positive Gruneissen parameter in the whole Brillouin zone is demonstrated in monolayer MoS2 with much larger Gruneissen parameter for acoustic modes than that for the optical modes, suggesting that monolayer MoS2 sheet possesses a positive coefficient of thermal-expansion. The calculated phonon lifetimes of the infrared active modes are 5.50 and 5.72 ps for E'and A2'' respectively, in good agreement with experimental result obtained by fitting the dielectric oscillators with the infrared reflectivity spectrum. The lifetime of Raman A1' mode (38.36 ps) is about 7 times longer than those of the infrared modes. The dominated phonon mean free path of monolayer MoS2 is less than 20 nm, about 30-fold smaller than that of graphene. Combined with the non-equilibrium Green's function calculations, the room temperature thermal conductivity of monolayer MoS2 is found to be around 23.2 Wm-1K-1, two orders of magnitude lower than that of graphene.
Parametric robust structured control design
Creators: name: Apkarian, P.
name: Dao, M. N.
name: Noll, D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We present a new approach to parametric robust controller design, where we compute controllers of arbitrary order and structure which minimize the worst-case $H_\infty$ norm over a pre-specified set of uncertain parameters. At the core of our method is a nonsmooth minimization method tailored to functions which are semi-infinite minima of smooth functions. A rich test bench and a more detailed example illustrate the potential of the technique, which can deal with complex problems involving multiple possibly repeated uncertain parameters.
Development of Interactive Instructional Model Using Augmented Reality based on Edutainment to Enhance Emotional Quotient
Creators: name: Pakprod, Nuttakan
name: Wannapiroon, Panita
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: The research aims to develop an interactive instructional model using augmented reality based on edutainment to enhance emotional quotient and evaluate the model. Two phases of the research will be carried out: a development and an evaluation of the model. Samples are experts in the field of IT, child psychology, and 7th grade curriculum management. Ten experts are selected by purposive sampling method. The obtained data are analyzed using mean and standard deviation. The research result demonstrates the following findings: 1) The results of this research show that Model consists of 3 elements: IIAR, EduLA, and EQ. EQ is a means to assess EQ based on Time Series Experimental Design using 2 kinds of tools; i.e. EQ Assessment by programs in tablet computers, and EQ Assessment by behavioral observation. 2) The ten experts have evaluated the model and commented that the developed model showed high suitability.
description: 8 pages
Language teaching in transnational contexts within an intercultural framework, ed. by Giovanna Carloni, Samuele Grassi, Anita Virga, Brian Zuccala
Creators: name: AAVV, AAVV
Publisher: name: Firenze University Press
Year: 2018

description:
description: LEA - Lingue e Letterature d'Oriente e d'Occidente, Vol 7 (2018)
The Formation of Very Massive Stars
Creators: name: Krumholz, Mark R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this chapter I review theoretical models for the formation of very massive stars. After a brief overview of some relevant observations, I spend the bulk of the chapter describing two possible routes to the formation of very massive stars: formation via gas accretion, and formation via collisions between smaller stars. For direct accretion, I discuss the problems of how interstellar gas may be prevented from fragmenting so that it is available for incorporation into a single very massive star, and I discuss the problems presented for massive star formation by feedback in the form of radiation pressure, photoionization, and stellar winds. For collision, I discuss several mechanisms by which stars might be induced to collide, and I discuss what sorts of environments are required to enable each of these mechanisms to function. I then compare the direct accretion and collision scenarios, and discuss possible observational signatures that could be used to distinguish between them. Finally, I come to the question of whether the process of star formation sets any upper limits on the masses of stars that can form.
description: 36 pages, 7 figures, review to appear as a chapter in "Very Massive Stars in the Local Universe" (Ed. J S Vink); fixed a missing citation / copyright acknowledgement, no other changes from previous version
Entanglement of Bipartite Quantum Systems driven by Repeated Interactions
Creators: name: Attal, S.
name: Deschamps, J.
name: Pellegrini, C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider a non-interacting bipartite quantum system $\mathcal H_S^A\otimes\mathcal H_S^B$ undergoing repeated quantum interactions with an environment modeled by a chain of independant quantum systems interacting one after the other with the bipartite system. The interactions are made so that the pieces of environment interact first with $\mathcal H_S^A$ and then with $\mathcal H_S^B$. Even though the bipartite systems are not interacting, the interactions with the environment create an entanglement. We show that, in the limit of short interaction times, the environment creates an effective interaction Hamiltonian between the two systems. This interaction Hamiltonian is explicitly computed and we show that it keeps track of the order of the successive interactions with $\mathcal H_S^A$ and $\mathcal H_S^B$. Particular physical models are studied, where the evolution of the entanglement can be explicitly computed. We also show the property of return of equilibrium and thermalization for a family of examples.
Electron-Energy-Loss Spectra of Free-Standing Silicene
Creators: name: Priede, Luis M.
name: Meza-Montes, Lilia
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Silicene is becoming one of the most important two-dimensional materials. In this work, EEL Spectra were calculated for alfa-silicene (flat), and beta-silicene (low-buckled, and theoretically the most stable). Band structures were determined using the semi-empirical Tight-Binding Method considering second nearest neighbors, sp3 model, Harrison's rule, and Slater-Koster parameterization. The dielectric function was calculated within the Random Phase Approximation and a space discretization scheme. We found that, compared to bulk Si, additional resonances appear which are red-shifted. Buckling gives rise to a richer structure at low energy.
description: 6 pages
PHILOLOGY AND HERMENEUTICS: TRACES OF PETER SZONDI, ED. BY ÉVA KOCZISZKY
Creators: name: ,
Publisher: name: Firenze University Press
Year: 2018

description:
description: LEA - Lingue e Letterature d'Oriente e d'Occidente, Vol 7 (2018)
Stochastic modeling and large-eddy simulation of heated concentric coaxial pipe flow
Creators: name: Klein, Marten
name: Tsai, Pei-Yun
name: Schmidt, Heiko
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 76F25, 76F40, 80A20, 82C31, 82C70

description: Turbulent concentric coaxial pipe flows are numerically investigated as canonical problem addressing spanwise curvature effects on heat and momentum transfer that are encountered in various engineering applications. It is demonstrated that the wall-adapting local eddy-viscosity (WALE) model within a large-eddy simulation (LES) framework, without model parameter recalibration, has limited predictive capabilities as signalized by poor representation of wall curvature effects and notable grid dependence. The identified lack in the modeling of radial transport processes is therefore addressed here by utilizing a stochastic one-dimensional turbulence (ODT) model. A standalone ODT formulation for cylindrical geometry is used in order to asses to which extent the predictability can be expected to improve by utilizing an advanced wall-modeling modeling strategy. It is shown that ODT is capable of capturing spanwise curvature and finite Reynolds number effects for fixed adjustable ODT model parameters. Based on the analogy of heat and mass transfer, present results yield new opportunities for modeling turbulent transfer process in chemical, process, and thermal engineering.
description: In: New Results in Numerical and Experimental Fluid Mechanics XIV -- Contributions to the 23rd STAB/DGLR Symposium Berlin, Germany, 2022, edited by Andreas Dillmann, Gerd Heller, Ewald Kr\"amer, Claus Wagner, and Julien Weiss
title: Анализ синтетических красителей в кетчупах и томатной пасте
Creators: name: Пасовский, А.П.
name: Бегунов, А.А.
name: Ахмедов, Б.М.
Publisher: name: Tashkent State Technical University Named after Islam Karimov
Year: 2018

description: Изучено влияние матриксов плодовоовощных консервных продуктов на выделение и последующее хроматографическое разделение синтетических красителей азо-, трифенилметанового и индигоидного ряда, разрешенных в настоящее время к применению в пищевой промышленности. Исследования проводились с помощью жидкостного хроматографа Shimadzu LC-20 Prominence. Проведенные исследования призваны способствовать развитию нормативно-технического контроля синтетических красителей в продуктах питания.
Near-substrate composition depth profile of direct current-plated and pulse-plated Fe-Ni alloys
Creators: name: Neuróhr, Katalin
name: Csik, Attila
name: Vad, Kálmán
name: Molnár, György
name: Bakonyi, Imre
name: Péter, László
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Composition depth profiles of d.c.-plated and pulseplated Fe-Ni alloys have been investigated with the reverse depth profile analysis method. When d.c. plating is applied, the mole fraction of iron near the substrate is higher than during steadystate deposition since iron is preferentially deposited beside nickel and the achievement of the steadystate deposition condition takes time. The steadystate composition was achieved typically after depositing a 90-nm-thick alloy layer. In the pulseplating mode, samples with nearly uniform composition could be obtained at a duty cycle of 0.2 or smaller, and a continuous change in the composition profile could be seen as a function of the duty cycle above this value. A constant sample composition was achieved with pulseplating in a wide peak current density interval. The composition depth profile was also measured for a wide range of Fe2+ concentration. The different characteristics of the composition depth profile as a function of the deposition mode can be explained mostly in terms of mass transport effects. The elucidation of the results is fully in accord with the kinetic models of anomalous codeposition and with the assumption of the superposition of a stationary and a pulsating diffusion layer. The results achieved help to identify the conditions for the deposition of ultrathin magnetic samples with uniform composition along the growth direction.
RIPENSARE LA DIDATTICA DELLE LINGUE E DELLE LETTERATURE IN ITALIA 1. REPORT
Creators: name: ,
Publisher: name: Firenze University Press
Year: 2018

description:
description: LEA - Lingue e Letterature d'Oriente e d'Occidente, Vol 7 (2018)
Investigation of countercurrent flow profile and liquid holdup in random packed column with local CFD data
Creators: name: Fu, Yucheng
name: Bao, Jie
name: Singh, Rajesh Kumar
name: Wang, Chao
name: Xu, Zhijie
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Liquid holdup and mass transfer area are critical parameters for packed column design and CO2 capture efficiency prediction. In this paper, a framework was established for modeling the liquid-gas countercurrent flow hydrodynamics in a random packed column with pall rings. Besides the column-averaged information, the radial pall ring distribution, velocity, and liquid holdup profiles are obtained to study the entrance effect and the wall influence in the packed column. With local CFD data, the validated packing specific area ap and liquid velocity uL range for liquid holdup correlation is significantly expanded with respect to existing experimental or column-averaged CFD data. The proposed liquid holdup correlation $h_L \propto u_L^{0.44}$ indicates the random packed column falls in a viscous to turbulent transition regime and it covers a Reynolds Number range of [6.7-40.2]. The derived liquid holdup correlation is in good agreement with existing correlations developed using the column-averaged experimental data.
Heavy dense QCD and nuclear matter from an effective lattice theory
Creators: name: Langelage, Jens
name: Neuman, Mathias
name: Philipsen, Owe
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A three-dimensional effective lattice theory of Polyakov loops is derived from QCD by expansions in the fundamental character of the gauge action, u, and the hopping parameter, κ, whose action is correct to κ^n u^m with n+m=4. At finite baryon density, the effective theory has a sign problem which meets all criteria to be simulated by complex Langevin as well as by Monte Carlo on small volumes. The theory is valid for the thermodynamics of heavy quarks, where its predictions agree with simulations of full QCD at zero and imaginary chemical potential. In its region of convergence, it is moreover amenable to perturbative calculations in the small effective couplings. In this work we study the challenging cold and dense regime. We find unambiguous evidence for the nuclear liquid gas transition once the baryon chemical potential approaches the baryon mass, and calculate the nuclear equation of state. In particular, we find a negative binding energy per nucleon causing the condensation, whose absolute value decreases exponentially as mesons get heavier. For decreasing meson mass, we observe a first order liquid gas transition with an endpoint at some finite temperature, as well as gap between the onset of isospin and baryon condensation.
description: 34 pages, 13 figures
Experimental Implementation of a Quantum Optical State Comparison Amplifier
Creators: name: Donaldson, Ross J.
name: Collins, Robert J.
name: Eleftheriadou, Electra
name: Barnett, Stephen M.
name: Jeffers, John
name: Buller, Gerald S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum optical amplification that beats the noise addition limit for deterministic amplifiers has been realized experimentally using several different nondeterministic protocols. These schemes either require single-photon sources, or operate by noise addition and photon subtraction. Here we present an experimental demonstration of a protocol that allows nondeterministic amplification of known sets of coherent states with high gain and high fidelity. The experimental system employs the two mature quantum optical technologies of state comparison and photon subtraction and does not rely on elaborate quantum resources such as single-photon sources. The use of coherent states rather than single photons allows for an increased rate of amplification and a less complex photon source. Furthermore it means that the amplification is not restricted to low amplitude states. With respect to the two key parameters, fidelity and amplified state production rate, we demonstrate, without the use of quantum resources, significant improvements over previous experimental implementations.
description: 21 pages, 4 figures
An octave spanning mid-infrared frequency comb generated in a silicon nanophotonic wire waveguide
Creators: name: Kuyken, Bart
name: Ideguchi, Takuro
name: Holzner, Simon
name: Yan, Ming
name: Haensch, Theodor W.
name: Van Campenhout, Joris
name: Verheyen, Peter
name: Coen, Stéphane
name: Leo, Francois
name: Baets, Roel
name: Roelkens, Gunther
name: Picque, Nathalie
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate an octave-spanning frequency comb with a spectrum covering wavelengths from 1,540 nm up to 3,200 nm. The supercontinuum is generated by pumping a 1-cm long dispersion engineered silicon wire waveguide by 70 fs pulses with an energy of merely 15 pJ. We confirm the phase coherence of the output spectrum by beating the supercontinuum with narrow bandwidth CW lasers. We show that the experimental results are in agreement with numerical simulations.
Seilbahnsteuerungstechnik im Wandel
Creators: name: Joss, Marcel
Publisher: name: Zenodo
Year: 2023

description: kein Abstract verfügbar
description: + ID der Publikation: hslu_49078 + Art des Beitrages: Referat/Vortrag + Veranstalter: zentralschweiz innovativ + Sprache: Deutsch + Letzte Aktualisierung: 2023-03-06 08:52:08
Casimir energy and force induced by an impenetrable flux tube of finite radius
Creators: name: Gorkavenko, V. M.
name: Sitenko, Yu. A.
name: Stepanov, O. B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A perfectly reflecting (Dirichlet) boundary condition at the edge of an impenetrable magnetic-flux-carrying tube of nonzero transverse size is imposed on the charged massive scalar matter field which is quantized outside the tube. We show that the vacuum polarization effects outside the tube give rise to a macroscopic force acting at the increase of the tube radius (if the magnetic flux is held steady). The Casimir energy and force are periodic in the value of the magnetic flux, being independent of the coupling to the space-time curvature scalar. We conclude that a topological defect of the vortex type can polarize the vacuum of only those quantum fields that have masses which are much less than a scale of the spontaneous symmetry breaking.
description: 16 pages, 3 figures, 1 table. arXiv admin note: substantial text overlap with arXiv:1207.0224
Fabrication of optically smooth Sn thin films
Creators: name: Borra, Vamsi
name: Georgiev, Daniel G.
name: Grice, Corey R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The fabrication of optically smooth thin Sn films by vacuum or electrodeposition techniques is usually challenging. Little has been published on how to address this challenge mainly because very few applications require such smooth Sn surfaces. The excitation of surface plasmon polaritons on Sn surfaces by prism-based methods represents a case that requires very smooth surfaces and has motivated this work. It is shown that the deposition rate and the substrate temperature of a vacuum evaporation method can be optimized to obtain very smooth Sn films and this is supported by direct imaging evidence from atomic force microscopy and scanning electron microscopy.
description: 7 figures
LETTERATURA E CULTURA VISUALE / LITERATURE AND VISUAL CULTURE. INTRODUZIONE AI LAVORI 2019-2020 / INTRODUCTION TO THE 2019-2020 WORKS
Creators: name: AAVV, AAVV
Publisher: name: Firenze University Press
Year: 2018

description:
description: LEA - Lingue e Letterature d'Oriente e d'Occidente, Vol 7 (2018)
Sn whisker growth mitigation by using NiO sublayers
Creators: name: Borra, Vamsi
name: Itapu, Srikanth
name: Georgiev, Daniel G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The potential of NiO sublayers for whisker growth mitigation has been examined. A thin NiO film was applied on a Cu-coated substrate before the deposition of a thicker Sn layer. The growth of Sn whiskers was then followed by optical and scanning electron microscopy and was compared with the whisker growth on a control sample without the NiO sublayer. No whiskers were observed on the sample with the NiO layer even after 12 months, whereas the control sample developed whiskers of size and density that is generally expected, based on the vast amount of published work on the topic. The mechanisms of whisker growth and whisker growth suppression are briefly discussed as well.
description: 7 figures
Context-driven Software Project Estimation
Creators: name: Münch, Jürgen
name: Heidrich, Jens
Publisher: name: arXiv
Year: 2014
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Using quantitative data from past projects for software project estimation requires context knowledge that characterizes its origin and indicates its applicability for future use. This article sketches the SPRINT I technique for project planning and controlling. The underlying prediction mechanism is based on the identification of similar past projects and the building of so-called clusters with typical data curves. The article focuses on how to characterize these clusters with context knowledge and how to use context information from actual projects for prediction. The SPRINT approach is tool-supported and first evaluations have been conducted.
description: 2 pages
Inducing Lifshitz transition by extrinsic doping of surface bands in topological crystalline insulator Pb$_{1-x}$Sn$_{x}$Se
Creators: name: Pletikosić, Ivo
name: Gu, Genda D.
name: Valla, Tonica
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Narrow gap semiconductor Pb$_{1-x}$Sn$_{x}$Se was investigated for topologically protected surface states in its rock-salt structural phase for x=0.45, 0.23, 0.15, and 0. Angle-resolved photoelectron spectroscopy of intrinsically p-doped samples showed clear indication of two Dirac cones, eccentric about the time-reversal invariant point X of the surface Brillouin zone for all but the x=0 sample. Adsorption of alkalies gradually filled the surface bands with electrons, driving the x>0 topological crystalline insulator systems through Lifshitz transitions, and from a hole- to electron-like Fermi surface. The electron-doped bands in x>0 samples exhibited the full configuration of the Dirac cones, also confirming electron-hole symmetry of the surface bands.
Metal whisker growth induced by localized, high-intensity DC electric fields
Creators: name: Borra, Vamsi
name: Oudat, Osama
name: Georgiev, Daniel G.
name: Karpov, Victor G.
name: Shvydka, Diana
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work, a very high, locally applied electric field was used to induce whisker nucleation on an Sn film. The field was generated by using a conductive AFM tip and applying a voltage bias between the sample and the conductive cantilever>The tip-sample separation distance was thus controllable, and any dielectric breakdown could be avoided. At locations where the AFM tip was positioned for an extended period, minuscule whiskers were observed, whose growth direction matched vertical orientation of the field.
description: 4 figures
Explaining by Imitating: Understanding Decisions by Interpretable Policy Learning
Creators: name: Hüyük, Alihan
name: Jarrett, Daniel
name: van der Schaar, Mihaela
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Understanding human behavior from observed data is critical for transparency and accountability in decision-making. Consider real-world settings such as healthcare, in which modeling a decision-maker's policy is challenging -- with no access to underlying states, no knowledge of environment dynamics, and no allowance for live experimentation. We desire learning a data-driven representation of decision-making behavior that (1) inheres transparency by design, (2) accommodates partial observability, and (3) operates completely offline. To satisfy these key criteria, we propose a novel model-based Bayesian method for interpretable policy learning ("Interpole") that jointly estimates an agent's (possibly biased) belief-update process together with their (possibly suboptimal) belief-action mapping. Through experiments on both simulated and real-world data for the problem of Alzheimer's disease diagnosis, we illustrate the potential of our approach as an investigative device for auditing, quantifying, and understanding human decision-making behavior.
High performance bilayer-graphene Terahertz detectors
Creators: name: Spirito, Davide
name: Coquillat, Dominique
name: De Bonis, Sergio L.
name: Lombardo, Antonio
name: Bruna, Matteo
name: Ferrari, Andrea C.
name: Pellegrini, Vittorio
name: Tredicucci, Alessandro
name: Knap, Wojciech
name: Vitiello, Miriam S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report bilayer-graphene field effect transistors operating as THz broadband photodetectors based on plasma-waves excitation. By employing wide-gate geometries or buried gate configurations, we achieve a responsivity $\sim 1.2V/W (1.3 mA/W)$ and a noise equivalent power $\sim 2\times 10^{-9} W/Hz^{-1/2}$ in the 0.29-0.38 THz range, in photovoltage and photocurrent mode. The potential of this technology for scalability to higher frequencies and the development of flexible devices makes our approach competitive for a future generation of THz detection systems.
description: 8 pages, 5 figures. Submitted to Applied Physics Letters
title: Аналитическое описание зависимости магнитной проницаемости сердечника магнитоупругих датчиков усилий от механических напряжений
Creators: name: Амиров, С.Ф.
name: Жураева, К.К.
Publisher: name: Tashkent State Technical University Named after Islam Karimov
Year: 2018

description: Получено аналитическое выражение зависимости относительной магнитной проницаемости ферромагнитного сердечника магнитоупругого датчика усилий от прилагаемых механических напряжений. Показано, что для магнитоупругих датчиков усилий, магнитная цепь которых работает на линейном участке основной кривой намагничивания, зависимость относительной магнитной проницаемости ферромагнитного сердечника от прилагаемых к датчикам механических напряжений может быть аппроксимирована в виде линейной функции с отрицательным коэффициентом пропорциональности.
Punzi-loss: a non-differentiable metric approximation for sensitivity optimisation in the search for new particles
Creators: name: Feichtinger, P.
name: Haigh, H.
name: Inguglia, G.
name: Kahn, J.
name: Abudinén, F.
name: Bertemes, M.
name: Bilokin, S.
name: Campajola, M.
name: Casarosa, G.
name: Cunliffe, S.
name: Corona, L.
name: De Nuccio, M.
name: De Pietro, G.
name: Dey, S.
name: Eliachevitch, M.
name: Ferber, T.
name: Gemmler, J.
name: Goldenzweig, P.
name: Gottmann, A.
name: Graziani, E.
name: Hohmann, M.
name: Humair, T.
name: Keck, T.
name: Komarov, I.
name: Krohn, J.-F.
name: Kuhr, T.
name: Lacaprara, S.
name: Lieret, K.
name: Maiti, R.
name: Martini, A.
name: Meier, F.
name: Metzner, F.
name: Milesi, M.
name: Park, S.-H.
name: Prim, M.
name: Pulvermacher, C.
name: Ritter, M.
name: Sato, Y.
name: Schwanda, C.
name: Sutcliffe, W.
name: Tamponi, U.
name: Tenchini, F.
name: Urquijo, P.
name: Zani, L.
name: Žlebčík, R.
name: Zupanc, A.
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2022
Subjects: subject: 530
subject: new particle
subject: sensitivity
subject: neural network
subject: statistical analysis
subject: data analysis method

description: We present the novel implementation of a non-differentiable metric approximation and a corresponding loss-scheduling aimed at the search for new particles of unknown mass in high energy physics experiments. We call the loss-scheduling, based on the minimisation of a figure-of-merit related function typical of particle physics, a Punzi-loss function, and the neural network that utilises this loss function a Punzi-net. We show that the Punzi-net outperforms standard multivariate analysis techniques and generalises well to mass hypotheses for which it was not trained. This is achieved by training a single classifier that provides a coherent and optimal classification of all signal hypotheses over the whole search space. Our result constitutes a complementary approach to fully differentiable analyses in particle physics. We implemented this work using PyTorch and provide users full access to a public repository containing all the codes and a training example.
Approximating gradients with continuous piecewise polynomial functions
Creators: name: Veeser, Andreas
Publisher: name: arXiv
Year: 2014
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 41A15, 41A63, 41A05, 65N30, 65N15

description: Motivated by conforming finite element methods for elliptic problems of second order, we analyze the approximation of the gradient of a target function by continuous piecewise polynomial functions over a simplicial mesh. The main result is that the global best approximation error is equivalent to an appropriate sum in terms of the local best approximations errors on elements. Thus, requiring continuity does not downgrade local approximability and discontinuous piecewise polynomials essentially do not offer additional approximation power, even for a fixed mesh. This result implies error bounds in terms of piecewise regularity over the whole admissible smoothness range. Moreover, it allows for simple local error functionals in adaptive tree approximation of gradients.
description: 21 pages, 1 figure
Modeling the Telemarketing Process using Genetic Algorithms and Extreme Boosting: Feature Selection and Cost-Sensitive Analytical Approach
Creators: name: Ghatasheh, Nazeeh
name: Altaharwa, Ismail
name: Aldebei, Khaled
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Currently, almost all direct marketing activities take place virtually rather than in person, weakening interpersonal skills at an alarming pace. Furthermore, businesses have been striving to sense and foster the tendency of their clients to accept a marketing offer. The digital transformation and the increased virtual presence forced firms to seek novel marketing research approaches. This research aims at leveraging the power of telemarketing data in modeling the willingness of clients to make a term deposit and finding the most significant characteristics of the clients. Real-world data from a Portuguese bank and national socio-economic metrics are used to model the telemarketing decision-making process. This research makes two key contributions. First, propose a novel genetic algorithm-based classifier to select the best discriminating features and tune classifier parameters simultaneously. Second, build an explainable prediction model. The best-generated classification models were intensively validated using 50 times repeated 10-fold stratified cross-validation and the selected features have been analyzed. The models significantly outperform the related works in terms of class of interest accuracy, they attained an average of 89.07\% and 0.059 in terms of geometric mean and type I error respectively. The model is expected to maximize the potential profit margin at the least possible cost and provide more insights to support marketing decision-making.
Pesantren Walisanga Ende, Membangun Asa di Antara Kerasnya Alam: Pesantren Pertama Di Nusa Tenggara Timur (NTT)
Creators: name: Murtadlo, Muhamad
Publisher: name: Zenodo
Year: 2015
Subjects: Pesantren Walisanga
Ende
Multikultural

description: Book Chapter
Measurement-based implementation makes entanglement purification based on hashing practical
Creators: name: Zwerger, M.
name: Briegel, H. J.
name: Dür, W.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate entanglement purification protocols based on hashing, where a large number of noisy entangled pairs is jointly processed to obtain a reduced number of perfect, noiseless copies. While hashing and breeding protocols are the only purification protocols that asymptotically obtain a nonzero yield, they are not applicable in a realistic scenario if local gates and measurements are imperfect. We show that such problems can be overcome by a compact measurement-based implementation, yielding entanglement purification schemes with nonzero yield that are applicable also in noisy scenarios, with tolerable noise per particle of several percent. We also generalize these findings to multiparty purification protocols for arbitrary graph states.
Building a community of data stewards in Flanders - The FRDN Knowledge Hub's experience with the Community Canvas
Creators: name: Oset García, Paula
Publisher: name: Zenodo
Year: 2024
Subjects: Community building
Research Data Management

description: Slides from the keynote presentation for the Data Stewardship goes Germany 2024 (DSgG 2024). 

The presentation highlights the development of the FRDN Knowledge Hub, a network for data stewards and professionals in research data management (RDM) and open science (OS). Launched in 2021, the Knowledge Hub aimed to share expertise and foster collaboration between data stewards and other research (data) support roles across Flemish research institutions. After initial challenges in sustaining member engagement, a participatory process based on the Community Canvas framework was introduced to reshape the community's vision and structure, which significantly increased member involvement and activity. This presentation aims to share key insights and lessons learned, that can serve as inspiration for other networks of data professionals.
Rotated stripe order and its competition with superconductivity in La$_{1.88}$Sr$_{0.12}$CuO$_4$
Creators: name: Thampy, V.
name: Dean, M. P. M.
name: Christensen, N. B.
name: Islam, Z.
name: Oda, M.
name: Ido, M.
name: Momono, N.
name: Wilkins, S. B.
name: Hil, J. P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report the observation of a bulk charge modulation in La$_{1.88}$Sr$_{0.12}$CuO$_4$ (LSCO) with a characteristic in-plane wave-vector of (0.236, $\pm δ$), with $δ$=0.011 r.l.u. The transverse shift of the ordering wave-vector indicates the presence of rotated charge-stripe ordering, demonstrating that the charge ordering is not pinned to the Cu-O bond direction. On cooling through the superconducting transition, we find an abrupt change in the growth of the charge correlations and a suppression of the charge order parameter indicating competition between the two orderings. Orthorhombic LSCO thus helps bridge the apparent disparities between the behavior previously observed in the tetragonal "214" cuprates and the orthorhombic yttrium and bismuth-based cuprates and thus lends strong support to the idea that there is a common motif to charge order in all cuprate families.
description: 6 pages, 4 figues
Synoptic solar radio observations as proxies for upper atmosphere modelling
Creators: name: de Wit, Thierry Dudok
name: Bruinsma, Sean
name: Shibasaki, Kiyoto
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The specification of the upper atmosphere strongly relies on solar proxies that can properly reproduce the solar energetic input in the UV. Whilst the microwave flux at 10.7 cm (also called F10.7 index) has been routinely used as a solar proxy, we show that the radio flux at other wavelengths provides valuable complementary information that enhances their value for upper atmospheric modelling. We merged daily observations from various observatories into a single homogeneous data set of fluxes at wavelengths of 30, 15, 10.7, 8 and 3.2 cm, spanning from 1957 to today. Using blind source separation (BSS), we show that their rotational modulation contains three contributions, which can be interpreted in terms of thermal bremsstrahlung and gyro-resonance emissions. The latter account for 90% of the rotational variability in the F10.7 index. Most solar proxies, such as the MgII index, are remarkably well reconstructed by simple linear combination of radio fluxes at various wavelengths. The flux at 30 cm stands out as an excellent proxy and is better suited than the F10.7 index for the modelling the thermosphere-ionosphere system, most probably because it receives a stronger contribution from thermal bremsstrahlung. This better performance is illustrated here through comparison between the observed thermospheric density, and reconstructions by the Drag Temperature Model.
description: 13 pages