cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
NISHONLANGAN SANOATBOP TUT IPAK QURTI DURAGAYLARINI YARATISHNING ILMIY ASOSLARINI O'RGANISH
Creators: name: Nortosheva, Nozima
Publisher: name: Zenodo
Year: 2024

description: Ipakchilik ilmiy-tadqiqot institutining ipak qurtining jahon kolleksiyasidagi, jinsi bo‘yicha nishonlangan zotlarning mahsuldorlik ko‘rsatkichlarini tahlili, tanlangan zotlarlarning ayrim qimmatli ko‘rsatkichlarini yaxshilash, jinsi bo‘yicha nishonlangan zotlarda pillardan kapalaklarning chiqmaslik muammosi, jins bo‘yicha nishonlangan zotlar orasida duragay kombinatsiyalarni yaratish, yaratilgan duragaylarni laboratoriyada va ishlab chiqarish sharoitida sinovdan o‘tkazish jarayonlari keltirilgan.
A rate of convergence for the circular law for the complex Ginibre ensemble
Creators: name: Meckes, Elizabeth S.
name: Meckes, Mark W.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We prove rates of convergence for the circular law for the complex Ginibre ensemble. Specifically, we bound the expected $L_p$-Wasserstein distance between the empirical spectral measure of the normalized complex Ginibre ensemble and the uniform measure on the unit disc, both in expectation and almost surely. For $1 \le p \le 2$, the bounds are of the order $n^{-1/4}$, up to logarithmic factors.
description: Final version: to appear in Annales de la Facult\'e des Sciences de Toulouse. Previous comments: New result added giving almost sure convergence rates in addition to rates in expectation. One figure added to illustrate an initial segment with respect to the spiral order. Several references to related work added
Simulations of Odd Microswimmers
Creators: name: Kobayashi, Akira
name: Yasuda, Kento
name: Lin, Li-Shing
name: Sou, Isamu
name: Hosaka, Yuto
name: Komura, Shigeyuki
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We perform numerical simulations of odd microswimmers consisting of three spheres and two odd springs. To describe the hydrodynamic interaction, both the Oseen-type and the Rotne-Prager-Yamakawa (RPY)-type mobilities are used. For the Oseen-type mobility, the simulation results quantitatively reproduce the asymptotic expression of the average velocity. For the RPY-type mobility, on the other hand, the average velocity is smaller than that of the Oseen-type mobility and the deviation is more pronounced for larger spheres. We also perform simulations of microswimmers having different sphere sizes and show that the average velocity becomes smaller than that of the equal size case. The size of the middle sphere plays an important role in determining the average velocity.
Surface carboxylation of hydrophobic synthetic fibers for enhancing deposition of reduced graphene oxide to create highly conductive and bactericidal textiles
Creators: name: Dong, Yongchun
name: Sun, Xuan
name: Gu, Jiayu
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Hematology
subject: Infectious Diseases
subject: FOS: Health sciences

description: The surface functionality of three synthetic fibers including polyethylene terephthalate (PET) fiber, polypropylene (PP) fiber and polytetrafluoroethylene (PTFE) fiber was obviously hindered by their high hydrophobicity. In this work, the three fibers were carboxylated by different surface modification methods to introduce carboxyl groups for increasing the deposition of reduced graphene oxide (RGO) on their surface. High surface carboxyl group content further enhanced RGO deposition, thus increasing electrical conductivity of these fibers. Carboxylated PET and PP fibers deposited more RGO, and show higher electrical conductivity and antibacterial activity than carboxylated PTFE fiber. Increasing temperature, acidic pH or the addition of NaCl or anionic surfactant improved RGO deposition on PTFE fiber. The increasing number of GO deposition cycles increased electrical conductivity of RGO deposited PTFE fiber and its washing resistance. Glucose was used as an environmentally benign substitute of Na2S2O4 to improve the transformation of GO into RGO on these fibers.
Proofs of some conjectures on monotonicity of ratios of Kummer, Gauss and generalized hypergeometric functions
Creators: name: Mehrez, Khaled
name: Sitnik, Sergei M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 33C15

description: In 1993 one of the authors formulated some conjectures on monotonicity of ratios for exponential series sections. They lead to more general conjecture on monotonicity of ratios of Kummer hypergeometric functions and was not proved from 1993. In this paper we prove these conjectures in the more general setting for Kummer hypergeometric functions and its further generalizations for Gauss and generalized hypergeometric functions. The results are also closely connected with Turan--type inequalities.
description: 8 pages, minor correction of formulas and references
DataCite: agora e no futuro
Creators: name: Ferreira, Veronica
Publisher: name: Zenodo
Year: 2022
Subjects: DataCite Member Meeting 2022

description: Ligar a investigação, identificando o conhecimento Verónica Ferreira, DataCite DataCite Reunião Virtual Anual Setembro 2022 Uma gravação da apresentação pode ser encontrada em: https://youtu.be/WswcIAeK5aY
Swift J1728.9-3613 is a black hole X-ray binary: spectral and timing study using NICER
Creators: name: Saha, Debasish
name: Mandal, Manoj
name: Pal, Sabyasachi
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study different timing and spectral properties of the new Galactic X-ray transient Swift J1728.9-3613 using NICER and Swift, discovered by the Burst Alert Telescope (BAT) on the Neil Gehrels Swift Observatory. The source went through multiple transitions to different spectral states during the outburst, and the complete evolution created a q-shaped track in the hardness intensity diagram. A partial hysteresis is also observed in the RMS-intensity diagram, which is another well-defined phenomenon of black hole transients. In SIMS, power density spectra were dominated by broadband noise components, and two type B QPOs were detected. We have fitted 1-10 keV energy spectra obtained from NICER observations that were performed during the outburst, and the temporal evolution of spectral parameters were studied. On MJD 58584.69, a small-scale reflare happened, and we observed that the spectral index decreased to a much lower value associated with finite changes in other spectral parameters also, and the 1-10 keV averaged flux also increased. We observed that the innermost radius of the accretion disc was almost constant during the soft state, which corresponds to the Innermost Stable Circular Orbit (ISCO). We have measured the lower limit of mass of the compact object to be approximately 4.6 M, considering a non-spinning black hole binary system, by fitting 1-10 keV NICER spectra with the diskbb component. The soft-to-hard transition occurred when the bolometric luminosity was 0.01 times the Eddington luminosity. Based on our combined study of the evolution of the timing and spectral properties, we conclude that the new source Swift J1728.9-3613 is a black hole X-ray binary.
description: 6 figures, 2 tables, submitted in MNRAS
SARLAVHA: OʻZBEKISTONDA DAVLAT-XUSUSIY SHERIKLIK LOYIHALARINI MOLIYAVIY NAZORAT QILISHNI TOKOMILLASHTIRISH
Creators: name: Xoliqov, Akmal
Publisher: name: Zenodo
Year: 2024

description: O‘zbekistonda davlat-xususiy sheriklik tushunchasining mazmuni va mohiyati, hozirgi holati, milliy iqtisodiyotimizda tutgan oʻrni va afzalliklari. Shuningdek oʻzbekistonda davlat-xususiy sheriklik asosida amalga oshirilayotgan loyihalari va ularni monitoring qilishni takomillashitirish. Bundan tashqari davlat-xususiy sheriklik qonunining qabul qilinishidan koʻzlangan maqsadi va davlat-xususiy sheriklik (DXSh) rivojlangan mamlakatlar tajribasi yoritilgan.
Resonance shifts and spill-out effects in self-consistent hydrodynamic nanoplasmonics
Creators: name: Toscano, Giuseppe
name: Straubel, Jakob
name: Kwiatkowski, Alexander
name: Rockstuhl, Carsten
name: Evers, Ferdinand
name: Xu, Hongxing
name: Mortensen, N. Asger
name: Wubs, Martijn
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The standard hydrodynamic Drude model with hard-wall boundary conditions can give accurate quantitative predictions for the optical response of noble-metal nanoparticles. However, it is less accurate for other metallic nanosystems, where surface effects due to electron density spill-out in free space cannot be neglected. Here we address the fundamental question whether the description of surface effects in plasmonics necessarily requires a fully quantum-mechanical approach, such as time-dependent density-functional theory (TD-DFT), that goes beyond an effective Drude-type model. We present a more general formulation of the hydrodynamic model for the inhomogeneous electron gas, which additionally includes gradients of the electron density in the energy functional. In doing so, we arrive at a Self-Consistent Hydrodynamic Model (SC-HDM), where spill-out emerges naturally. We find a redshift for the optical response of Na nanowires, and a blueshift for Ag nanowires, which are both in quantitative agreement with experiments and more advanced quantum methods. The SC-HDM gives accurate results with modest computational effort, and can be applied to arbitrary nanoplasmonic systems of much larger sizes than accessible with TD-DFT methods. Moreover, while the latter typically neglect retardation effects due to time-varying magnetic fields, our SC-HDM takes retardation fully into account.
description: 27 pages, including 4 figures. Supplemental Material is available upon request to authors
Particle creation from the vacuum by an exponentially decreasing electric field
Creators: name: Adorno, T. C.
name: Gavrilov, S. P.
name: Gitman, D. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyze the creation of fermions and bosons from the vacuum by the exponentially decreasing in time electric field in detail. In our calculations we use QED and follow in main the consideration of particle creation effect in a homogeneous electric field. To this end we find complete sets of exact solutions of the $d$-dimensional Dirac equation in the exponentially decreasing electric field and use them to calculate all the characteristics of the effect, in particular, the total number of created particles and the probability of a vacuum to remain a vacuum. It should be noted that the latter quantities were derived in the case under consideration for the first time. All possible asymptotic regimes are discussed in detail. In addition, switching on and switching off effects are studied.
description: We add some references and minor comments. Version accepted for publication in Physica Scripta as a Invited Comment
Magnetic Solitons due to interfacial chiral interactions
Creators: name: Mellado, Paula
name: Tapia, Ignacio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study solitons in a zig-zag lattice of magnetic dipoles. The lattice comprises two sublattices of parallel chains with magnetic dipoles at their vertices. Due to orthogonal easy planes of rotation for dipoles belonging to different sublattices, the total dipolar energy of this system is separable into a sum of symmetric and chiral long-ranged interactions between the magnets where the last takes the form of Dzyaloshinskii-Moriya coupling. For a specific range of values of the offset between sublattices, the dipoles realize an equilibrium magnetic state in the lattice plane, consisting of one chain settled in an antiferromagnetic parallel configuration and the other in a collinear ferromagnetic fashion. If the offset grows beyond this value, the internal Dzyaloshinskii-Moriya field stabilizes two Bloch domain walls at the edges of the antiferromagnetic chain. The dynamics of these solitons is studied by deriving the long-wavelength lagrangian density for the easy axis antiferromagnet. We find that the chiral couplings between sublattices give rise to an effective magnetic field that stabilizes the solitons in the antiferromagnet. When the chains displace respect to each other, an emergent Lorentz force accelerates the domain walls along the lattice.
description: 6 pages, 3 figures
Budding of domains in mixed bilayer membranes
Creators: name: Wolff, Jean
name: Komura, Shigeyuki
name: Andelman, David
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We propose a model that accounts for budding behavior of domains in lipid bilayers, where each of the bilayer leaflets has a coupling between its local curvature and local lipid composition. The compositional asymmetry between the two monolayers leads to an overall spontaneous curvature. The membrane free-energy contains three contributions: bending energy, line tension, and a Landau free-energy for a lateral phase separation. Within a mean-field treatment, we obtain various phase diagrams which contain fully-budded, dimpled and flat states. In particular, for some range of membrane parameters, the phase diagrams exhibit a tricritical behavior as well as three-phase coexistence region. The global phase diagrams can be divided into three types and are analyzed in terms of the curvature-composition coupling parameter and domain size.
description: 11 pages, 12 figures
Exceptional Field Theory III: E$_{8(8)}$
Creators: name: Hohm, Olaf
name: Samtleben, Henning
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop exceptional field theory for E$_{8(8)}$, defined on a (3+248)-dimensional generalized spacetime with extended coordinates in the adjoint representation of E$_{8(8)}$. The fields transform under E$_{8(8)}$ generalized diffeomorphisms and are subject to covariant section constraints. The bosonic fields include an `internal' dreibein and an E$_{8(8)}$-valued `zweihundertachtundvierzigbein' (248-bein). Crucially, the theory also features gauge vectors for the E$_{8(8)}$ E-bracket governing the generalized diffeomorphism algebra and covariantly constrained gauge vectors for a separate but constrained E$_{8(8)}$ gauge symmetry. The complete bosonic theory, with a novel Chern-Simons term for the gauge vectors, is uniquely determined by gauge invariance under internal and external generalized diffeomorphisms. The theory consistently comprises components of the dual graviton encoded in the 248-bein. Upon picking particular solutions of the constraints the theory reduces to D=11 or type IIB supergravity, for which the dual graviton becomes pure gauge. This resolves the dual graviton problem, as we discuss in detail.
description: 26 pages, v2: published version
Statistical Issues in Astrophysical Searches for Particle Dark Matter
Creators: name: Conrad, Jan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this review statistical issues appearing in astrophysical searches for particle dark matter, i.e. indirect detection (dark matter annihilating into standard model particles) or direct detection (dark matter particles scattering in deep underground detectors) are discussed. One particular aspect of these searches is the presence of very large uncertainties in nuisance parameters (astrophysical factors) that are degenerate with parameters of interest (mass and annihilation/decay cross sections for the particles). The likelihood approach has become the most powerful tool, offering at least one well motivated method for incorporation of nuisance parameters and increasing the sensitivity of experiments by allowing a combination of targets superior to the more traditional data stacking. Other statistical challenges appearing in astrophysical searches are to large extent similar to any new physics search, for example at colliders, a prime example being the calculation of trial factors. Frequentist methods prevail for hypothesis testing and interval estimation, Bayesian methods are used for assessment of nuisance parameters and parameter estimation in complex parameter spaces. The basic statistical concepts will be exposed, illustrated with concrete examples from experimental searches and caveats will be pointed out.
description: Invited review, 38 pages, 9 figures, refereed version to match publication
ESSE YOZISHDA MAHORAT VA USLUB
Creators: name: Nasridinova, Gulbahor
Publisher: name: Zenodo
Year: 2024

description: Mazkur maqolada o‘zbek adabiyotida essenavisligi taraqqiyotining bosqichlari tadqiq etilgan shu bilan birga jahon adabiyotida esse janrining paydo bo‘lish davrlari ham ilmiy asoslari ko‘rsatilgan. Shundan kelib chiqib, dastlab esse janrida ijod qilgan essenavislarning  ijodi tahlillar asosida yoritildi.
Object Segmentation of Cluttered Airborne LiDAR Point Clouds
Creators: name: Caros, Mariona
name: Just, Ariadna
name: Segui, Santi
name: Vitria, Jordi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Airborne topographic LiDAR is an active remote sensing technology that emits near-infrared light to map objects on the Earth's surface. Derived products of LiDAR are suitable to service a wide range of applications because of their rich three-dimensional spatial information and their capacity to obtain multiple returns. However, processing point cloud data still requires a significant effort in manual editing. Certain human-made objects are difficult to detect because of their variety of shapes, irregularly-distributed point clouds, and low number of class samples. In this work, we propose an efficient end-to-end deep learning framework to automatize the detection and segmentation of objects defined by an arbitrary number of LiDAR points surrounded by clutter. Our method is based on a light version of PointNet that achieves good performance on both object recognition and segmentation tasks. The results are tested against manually delineated power transmission towers and show promising accuracy.
description: proceedings of the 24th International Conference of the Catalan Association for Artificial Intelligence (CCIA 2022)
A Quantum Annealing Approach for Fault Detection and Diagnosis of Graph-Based Systems
Creators: name: Perdomo-Ortiz, Alejandro
name: Fluegemann, Joseph
name: Narasimhan, Sriram
name: Biswas, Rupak
name: Smelyanskiy, Vadim N.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Diagnosing the minimal set of faults capable of explaining a set of given observations, e.g., from sensor readouts, is a hard combinatorial optimization problem usually tackled with artificial intelligence techniques. We present the mapping of this combinatorial problem to quadratic unconstrained binary optimization (QUBO), and the experimental results of instances embedded onto a quantum annealing device with 509 quantum bits. Besides being the first time a quantum approach has been proposed for problems in the advanced diagnostics community, to the best of our knowledge this work is also the first research utilizing the route Problem $\rightarrow$ QUBO $\rightarrow$ Direct embedding into quantum hardware, where we are able to implement and tackle problem instances with sizes that go beyond previously reported toy-model proof-of-principle quantum annealing implementations; this is a significant leap in the solution of problems via direct-embedding adiabatic quantum optimization. We discuss some of the programmability challenges in the current generation of the quantum device as well as a few possible ways to extend this work to more complex arbitrary network graphs.
HeartSiam: A Domain Invariant Model for Heart Sound Classification
Creators: name: Mashhoor, Reza Yousefi
name: Ayatollahi, Ahmad
Publisher: name: arXiv
Year: 2022
Subjects: subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Cardiovascular disease is one of the leading causes of death according to WHO. Phonocardiography (PCG) is a costeffective, non-invasive method suitable for heart monitoring. The main aim of this work is to classify heart sounds into normal/abnormal categories. Heart sounds are recorded using different stethoscopes, thus varying in the domain. Based on recent studies, this variability can affect heart sound classification. This work presents a Siamese network architecture for learning the similarity between normal vs. normal or abnormal vs. abnormal signals and the difference between normal vs. abnormal signals. By applying this similarity and difference learning across all domains, the task of domain invariant heart sound classification can be well achieved. We have used the multi-domain 2016 Physionet/CinC challenge dataset for the evaluation method. Results: On the evaluation set provided by the challenge, we have achieved a sensitivity of 82.8%, specificity of 75.3%, and mean accuracy of 79.1%. While overcoming the multi-domain problem, the proposed method has surpassed the first-place method of the Physionet challenge in terms of specificity up to 10.9% and mean accuracy up to 5.6%. Also, compared with similar state-of-the-art domain invariant methods, our model converges faster and performs better in specificity (4.1%) and mean accuracy (1.5%) with an equal number of epochs learned.
Symmetric Saliency-based Adversarial Attack To Speaker Identification
Creators: name: Yao, Jiadi
name: Chen, Xing
name: Zhang, Xiao-Lei
name: Zhang, Wei-Qiang
name: Yang, Kunde
Publisher: name: arXiv
Year: 2022
Subjects: subject: Sound (cs.SD)
subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Adversarial attack approaches to speaker identification either need high computational cost or are not very effective, to our knowledge. To address this issue, in this paper, we propose a novel generation-network-based approach, called symmetric saliency-based encoder-decoder (SSED), to generate adversarial voice examples to speaker identification. It contains two novel components. First, it uses a novel saliency map decoder to learn the importance of speech samples to the decision of a targeted speaker identification system, so as to make the attacker focus on generating artificial noise to the important samples. It also proposes an angular loss function to push the speaker embedding far away from the source speaker. Our experimental results demonstrate that the proposed SSED yields the state-of-the-art performance, i.e. over 97% targeted attack success rate and a signal-to-noise level of over 39 dB on both the open-set and close-set speaker identification tasks, with a low computational cost.
title: Die Repräsentation Afrikas in griechischen Quellen von der Bronzezeit bis in die Klassik
Creators: name: Cappel, Andreas
Year: 2021

description: Die vorliegende Arbeit, die in drei unterschiedlich gewichtete inhaltliche Abschnitte gegliedert ist, untersucht die Repräsentation des heute Afrika, in der Antike Libye genannten Erdteils in griechischen Quellen von der Bronzezeit bis in die Klassik, wobei der Schwerpunkt in der frühen Zeit (vor Einführung der Schrift) auf Sach- und Bildquellen, danach (ab ca. 700) auf schriftlichen Quellen liegt. Nach einleitenden Bemerkungen folgen in Kapitel 2 allgemeine theoretische Grundlagen (Verhältnis von Mythos und Geschichte. Versuch einer Definition des (griechischen) Mythos) und methodische Überlegungen (Quelleninterpretation, Quellenkritik). Kapitel 3 ist der Konzeption Afrikas als geographischer Raum gewidmet. Darin werden zunächst antike Bezeichnungen für den afrikanischen Erdteil und deren Bevölkerung erörtert. Danach folgt ein chronologischer Überblick über die Beziehungen Griechenlands mit Afrika (im Wesentlichen Ägypten und dem libyschen Küstengebiet) In Kapitel 4 steht schließlich die Analyse schriftlicher griechischer Quellen über Afrika, der der mit Abstand größte Teil der Arbeit gewidmet ist, im Mittelpunkt. Nach einführenden Bemerkungen zur Quellenlage (Erhaltungszustand, Umfang, Überlieferungsgeschichte) erfolgt eine eingehende Analyse ausgewählter Quellen, die sowohl im Original wie auch in einer deutschen Übersetzung angeführt und mit einem Kommentar versehen werden, wobei zunächst Afrika als Schauplatz mythischer Erzählungen behandelt wird. Ausführlich zur Sprache kommen dabei – gegliedert nach chronologischen Aspekten und jeweils geordnet nach literarischen Formen – wichtige Vertreter des Epos, der Lyrik, des Dramas und der frühen Geschichtsschreibung). Ein kurzer Abschnitt zur Darstellung von Landschaft und Bevölkerung Afrikas in geographischen und ethnographischen Berichten (mit Beispielen aus dem philosophisch-naturwissenschaftlichen Schrifttum und einem Seefahrerbericht) rundet das Kapitel ab.
title: Die Hässlichkeit als eine Kategorie sui generis am Beispiel von Videospielen
Creators: name: Eiter, Elias
Year: 2021

description: Digitale Medien sind in der heutigen Welt nicht mehr wegzudenken. Neben Filmen und der Musik haben nun auch Videospiele Einzug in den Mainstream und in die Popkultur gehalten. Früher als nerdige Freizeitbeschäftigung stigmatisiert, sind sie heute sogar in der Kunst angelangt. Die vorliegende Arbeit geht der Frage nach der Umsetzung der Hässlichkeit als eine eigenständige Kategorie in Videospielen nach. Der moderne Ansatz der Hässlichkeit als Kategorie sui generis, einer Hässlichkeit die nun nicht länger an die Kategorie des Schönen geknüpft ist, instrumentalisiert oder negativ bewertet wird, steht also im Zentrum dieser Arbeit. Es wird hierbei insbesondere auf Michael Pauen und Ursula Franke verwiesen. Um die Frage dieser Arbeit zu beantworten ist es zunächst notwendig eine Grundlage zu schaffen. Es ist sich dem Begriff der Hässlichkeit mithilfe wichtiger Vertreter anzunähern und auch zu klären, ob Videospiele als Kunstwerke verstanden werden können. Auf Daniel Martin Feige verweisend, ist dies für gewisse Videospiele grundsätzlich positiv zu beantworten. Schließlich ist eine Reihe an Beispielen angeführt, wie die Hässlichkeit in Videospielen grundsätzlich Verwendung findet. Nachdem diese Grundlage geschaffen ist, zeigt die Arbeit anhand einer Reihe von Spielen auf, dass gewisse Videospiele zu großen Teilen diesem modernen Ansatz entsprechen. Naturgemäß trifft dies nicht auf alle Videospiele zu, jedoch kann das Hässliche als eine Kategorie sui generis in diversen Videospielen ausfindig gemacht werden.
Impact of Reconfigurable Intelligent Surface Geometry on Communication Performance
Creators: name: Cui, Zhuangzhuang
name: Pollin, Sofie
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: When beamforming is applied at the transmitter, only part of reconfigurable intelligent surfaces (RISs) will be active, and it becomes indispensable to study the impact of RIS geometry. This letter aims at evaluating RIS geometry, ranging from linear (1D), and planar (2D), to cylindrical (3D) structures. We first derive the effective illuminated surface of different RIS topologies and determine the resulting signal-to-noise ratio (SNR) and outage probability. Then, we investigate the optimal RIS location to trade off active area versus received power considering near-field propagation. Numerical results quantify the benefit of RIS geometric compactness and provide their applicable ranges.
Search and design of nonmagnetic centrosymmetric layered crystals with large local spin polarization
Creators: name: Liu, Qihang
name: Zhang, Xiuwen
name: Jin, Hosub
name: Lam, Kanber
name: Im, Jino
name: Freeman, Arthur J.
name: Zunger, Alex
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Until recently, spin-polarization in nonmagnetic materials was the exclusive territory of non- centrosymmetric structures. It was recently shown that a form of hidden spin polarization (named the Rashba-2 or R-2 effect) could exist in globally centrosymmetric crystals provided the individual layers belong to polar point group symmetries. This realization could considerably broaden the range of materials that might be considered for spin-polarization spintronic applications to include the hitherto forbidden spintronic compound that belong to centrosymetric symmetries. Here we take the necessary steps to transition from such general, material-agnostic condensed matter theory arguments to material-specific design principles that could aid future laboratory search of R-2 materials. Specifically, we (i) classify different prototype layered structures that have been broadly studied in the literature in terms of their expected R-2 behavior, including the Bi2Se3-structure type (a prototype topological insulator), MoS2-structure type (a prototype valleytronic compound) and LaBiOS2-structure type (a host of superconductivity upon doping); (ii) formulate the properties that ideal R-2 compounds should have in terms of combination of their global unit cell symmetries with specific point group symmetries of their constituent sectors; (iii) use first-principles band theory to search for compounds from the prototype family of LaOBiS2-type structures that satisfy these R-2 design metrics. We initially consider both stable and hypothetical compounds to establish an understanding of trends of R-2 with composition, and then indicate the predictions that are expected to be stable and synthesizable. We predict large spin splittings (up to ~ 200 meV for holes in LaOBiTe2) as well as surface Rashba states. Experimental testing of such predictions is called for.
description: 29 pages, 6 figures, 2 tables
The Bright Supernova 1996cr in the Circinus Galaxy Imaged with VLBI: Shell Structure with Complex Evolution
Creators: name: Bietenholz, Michael F.
name: Bartel, Norbert
name: Dwarkadas, Vikram V.
name: Mtshweni, Leon
name: Orquera-Rojas, Carlos
name: Ellingsen, Simon
name: Horiuchi, Shinji
name: Tzioumis, Anastasios
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present broadband radio flux-density measurements supernova (SN) 1996cr, made with MeerKAT, ATCA and ALMA, and images made from very long baseline interferometry (VLBI) observations with the Australian Long Baseline Array. The spectral energy distribution of SN 1996cr in 2020, at age, $t \sim$8700 d, is a power-law, with flux density, $S \propto ν^{-0.588 \pm 0.011}$ between 1 and 34 GHz, but may steepen at $>35$ GHz. The spectrum has flattened since $t = 5370$ d (2010). Also since $t = 5370$ d, the flux density has declined rapidly, with $S_{\rm 9 \, GHz} \propto t^{-2.9}$. The VLBI image at $t = 8859$ d shows an approximately circular structure, with a central minimum reminiscent of an optically-thin spherical shell of emission. For a distance of 3.7 Mpc, the average outer radius of the radio emission at $t = 8859$ d was $(5.1 \pm 0.3) \times 10^{17}$ cm, and SN 1996cr has been expanding with a velocity of $4650 \pm 1060$ km s$^{-1}$ between $t=4307$ and 8859 d. It must have undergone considerable deceleration before $t = 4307$ d. Deviations from a circular shell structure in the image suggest a range of velocities up to $\sim$7000 km s$^{-1}$, and hint at the presence of a ring- or equatorial-belt-like structure rather than a complete spherical shell.
description: 10 Pages, 5 figures; Accepted for publication in MNRAS; this version (3) differs from version 2 by further minor revision
Coulomb string tension, asymptotic string tension, and the gluon chain
Creators: name: Greensite, Jeff
name: Szczepaniak, Adam 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 compute, via numerical simulations, the non-perturbative Coulomb potential of pure SU(3) gauge theory in Coulomb gauge. We find that that the Coulomb potential scales nicely in accordance with asymptotic freedom, that the Coulomb potential is linear in the infrared, and that the Coulomb string tension is about four times larger than the asymptotic string tension. We explain how it is possible that the asymptotic string tension can be lower than the Coulomb string tension by a factor of four.
description: 10 pages, 7 figures. v2: Published version. This version concerns only the non-perturbative Coulomb potential. Results for the ghost propagator are deferred to a later publication
Cardy Formulae for SUSY Theories in d=4 and d=6
Creators: name: Di Pietro, Lorenzo
name: Komargodski, Zohar
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider supersymmetric theories on a space with compact space-like slices. One can count BPS representations weighted by (-1)^F, or, equivalently, study supersymmetric partition functions by compactifying the time direction. A special case of this general construction corresponds to the counting of short representations of the superconformal group. We show that in four-dimensional N=1 theories the "high temperature" asymptotics of such counting problems is fixed by the anomalies of the theory. Notably, the combination a-c of the trace anomalies plays a crucial role. We also propose similar formulae for six-dimensional (1,0) theories.
description: 33 pages; added references
title: Spiele für den Mathematikunterricht der Oberstufe
Creators: name: Buzanich, Mario
Year: 2021

description: Diese ihnen vorliegende Arbeit befasst sich damit, Spiele zu finden, welche in einem gängigen Mathematikunterricht der Oberstufe zum Einsatz kommen können. Dabei werden die Themengebiete und Voraussetzungen aus dem aktuellen Lehrplan der AHS für Österreich abgeleitet. Anschließend werden die vorgestellten Spiele unter Kategorien beurteilt, welche aus der Behandlung von Themen sowohl der allgemeinen Didaktik, der mathematischen Fachdidaktik als auch der Spielwissenschaft hervorgehen. Dadurch soll gewährleistet werden, dass diese Spiele dokumentierte Kriterien für Lehrkräfte besitzen, an denen die Umsetzbarkeit und der Mehrwert für ihren Unterricht bestimmt werden kann. Durch die Einführung in eben diese Theorien wird dabei anfangs versucht einen Überblick in die Denkweisen zu geben, welche für die Erstellung eigener Spiele für den Mathematikunterricht wichtig sind.
Greybody Factors for Scalar Fields emitted by a Higher-Dimensional Schwarzschild-de-Sitter Black-Hole
Creators: name: Kanti, Panagiota
name: Pappas, Thomas
name: Pappas, Nikolaos
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this work, we consider the propagation of scalar particles in a higher-dimensional Schwarzschild-de-Sitter black-hole spacetime, both on the brane and in the bulk. Our analysis applies for arbitrary partial modes and for both minimal and non-minimal coupling of the scalar field. A general expression for the greybody factor is analytically derived in each case, and its low-energy behaviour is studied in detail. Its profile in terms of scalar properties (angular-momentum number and non-minimal coupling parameter) and spacetime properties (number of extra dimensions and cosmological constant) is thoroughly investigated. In contrast to previous studies, the effect of the cosmological constant is taken into account both close to and far away from the black-hole horizon. The dual role of the cosmological constant, that may act either as a helping agent to the emission of scalar particles or as a deterring effect depending on the value of the non-minimal coupling parameter, is also demonstrated.
description: Latex file, 28 pages, 10 figures, references added, typos corrected, version to appear in Physical Review D
Complexified boost invariance and holographic heavy ion collisions
Creators: name: Gubser, Steven S.
name: van der Schee, Wilke
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: At strong coupling holographic studies have shown that heavy ion collisions do not obey normal boost invariance. Here we study a modified boost invariance through a complex shift in time, and show that this leads to surprisingly good agreement with numerical holographic computations. When including perturbations the agreement becomes even better, both in the hydrodynamic and the far-from-equilibrium regime. One of the main advantages is an analytic formulation of the stress-energy tensor of the longitudinal dynamics of holographic heavy ion collisions.
description: 13 pages, 8 figures. v2: minor clarification and updated computation. v3: matches published version, added a table
Spin-orbit and exchange proximity couplings in graphene/1T-TaS$_2$ heterostructure triggered by a charge density wave
Creators: name: Szałowski, Karol
name: Milivojević, Marko
name: Kochan, Denis
name: Gmitra, Martin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Proximity-induced fine features and spin-textures of the electronic bands in graphene-based van der Waals heterostructures can be explored from the point of tailoring a twist angle. Here we study spin-orbit coupling and exchange coupling engineering of graphene states in the proximity of 1T-TaS$_2$ not triggering the twist, but a charge density wave in 1T-TaS$_2$-a realistic low-temperature phase. Using density functional theory and effective model we found that the emergence of the charge density wave in 1T-TaS$_2$ significantly enhances Rashba spin-orbit splitting in graphene and tilts the spin texture by a significant Rashba angle-in a very similar way as in the conventional twist-angle scenarios. Moreover, the partially filled Ta $d$-band in the charge density wave phase leads to the spontaneous emergence of the in-plane magnetic order that transgresses via proximity from 1T-TaS$_2$ to graphene, hence, simultaneously superimposing along the spin-orbit also the exchange coupling proximity effect. To describe this intricate proximity landscape we have developed an effective model Hamiltonian and provided a minimal set of parameters that excellently reproduces all the spectral features predicted by the first-principles calculations. Conceptually, the charge density wave provides a highly interesting knob to control the fine features of electronic states and to tailor the superimposed proximity effects-a sort of twistronics without twist.
Photometric Objects Around Cosmic Webs (PAC) Delineated in a Spectroscopic Survey. IV. High Precision Constraints on the Evolution of Stellar-Halo Mass Relation at Redshift $z<0.7$
Creators: name: Xu, Kun
name: Jing, Y. P.
name: Zheng, Yun
name: Gao, Hongyu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Taking advantage of the Photometric objects Around Cosmic webs (PAC) method developed in Paper I, we measure the excess surface density $\bar{n}_2w_{\rm{p}}$ of photometric objects around spectroscopic objects down to stellar mass $10^{8.0}M_{\odot}$, $10^{9.2}M_{\odot}$ and $10^{9.8}M_{\odot}$ in the redshift ranges of $z_s<0.2$, $0.2
description: 18 + 9 (appendix) pages, 12 + 7 (appendix) figures. Main results in Figure 6-9. Published in ApJ. arXiv admin note: text overlap with arXiv:2207.12423
Homomorphisms on infinite direct products of groups, rings and monoids
Creators: name: Bergman, George M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Group Theory (math.GR)
subject: Logic (math.LO)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 08B25 (Primary), 20A15, 20K25, 17A01, 20M15 (Secondary)

description: We study properties of a group, abelian group, ring, or monoid $B$ which (a) guarantee that every homomorphism from an infinite direct product $\prod_I A_i$ of objects of the same sort onto $B$ factors through the direct product of finitely many ultraproducts of the $A_i$ (possibly after composition with the natural map $B\to B/Z(B)$ or some variant), and/or (b) guarantee that when a map does so factor (and the index set has reasonable cardinality), the ultrafilters involved must be principal. A number of open questions, and topics for further investigation, are noted.
description: 26 pages. Copy at http://math.berkeley.edu/~gbergman/papers may be updated more frequently than arXiv copy. Version 2 has minor revisions in wording etc. from version 1
Shielding a charged black hole
Creators: name: Feng, Justin C.
name: Chakraborty, Sumanta
name: Cardoso, Vitor
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We describe a shielding mechanism for a charged black hole immersed in a background involving charged matter fields, solely arising from the Einstein-Maxwell field equations. In particular, we consider a charged generalization of the Einstein cluster, that is a charged black hole surrounded by an effective fluid model for a partially charged dust cloud. We show that the shielding mechanism, arising thereof, is generic and appears in a different parametrization of the problem as well. In this process, we provide the most general electrovacuum solution in a spacetime region devoid of charges, but in the presence of a static and spherically symmetric charge distribution elsewhere. Side by side, we also introduce a convenient parametrization, providing the global solution of the Einstein-Maxwell's field equations in the presence of a charged black hole within the environment of charged fluid. We also comment on the nature of the photon sphere, shadow radius and the eikonal quasi-normal modes in the Einstein-Maxwell cluster.
description: 12 pages, 9 figures, 1 table
Peer Evaluation of Video Lab Reports in a Blended Introductory Physics Course
Creators: name: Douglas, Scott S.
name: Lin, Shih-Yin
name: Aiken, John M.
name: Thoms, Brian D.
name: Greco, Edwin F.
name: Caballero, Marcos D.
name: Schatz, Michael F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: The Georgia Tech blended introductory calculus-based mechanics course emphasizes scientific communication as one of its learning goals, and to that end, we gave our students a series of four peer-evaluation assignments intended to develop their abilities to present and evaluate scientific arguments. Within these assignments, we also assessed students' evaluation abilities by comparing their evaluations to a set of expert evaluations. We summarize our development efforts and describe the changes we observed in student evaluation behavior.
description: 4 pages, 1 table, 2 figures, submitted to Summer 2014 PERC Proceedings
title: Der Einfluss von Tonhöhenmanipulation weiblicher Stimmen auf Stimmattraktivitäts- und Gesichtsattraktivitäts- Beurteilungen
Creators: name: Ameen, Karsan
Year: 2021

description: Da bisherige Forschungsergebnisse dafürsprechen, dass Attraktivität multimodal wahrgenommen wird, stellt sich die Frage wie Wahrnehmungen von der visuellen und auditiven Modalität im Kontext von Attraktivität interagieren. Ein wichtiger akustischer Parameter zur Variation von Stimmattraktivität ist die Tonhöhe. Insbesondere scheinen Männer, Frauenstimmen mit hoher Tonhöhe als attraktiver zu beurteilen, da diese mit Partnerqualitäten wie Jugendlichkeit, Gesundheit, und Weiblichkeit assoziiert werden. In der vorliegenden Studie wurde untersucht, ob eine Erhöhung der Tonhöhe weiblicher Stimmen zu einer erhöhten Bewertung von Attraktivität, Weiblichkeit, Gesundheit und zu einer verringerten Alterseinschätzung führt. 63 männliche Teilnehmer wurden in einem Within-Subject-Design getestet, in dem sowohl weibliche Stimmen (Audio-Block) als auch kurze Videoclips von weiblichen Gesichtern mit den dazugehörigen Stimmen (Audiovisueller-Block) präsentiert wurden. Laut unseren Ergebnissen werden Frauenstimmen mit erhöhter Tonhöhe im Vergleich zu nicht-manipulierten Stimmen als attraktiver, weiblicher und jünger, aber nicht gesünder beurteilt. Wenn jedoch manipulierte und nicht- manipulierte Stimmen gleichzeitig mit synchronisierten Gesichtsvideos präsentiert werden, sind diese Effekte nicht vorhanden. Diese Ergebnisse unterstützen die Multiple-Message- Hypothese, dass Stimmen und Gesichter unterschiedliche Aspekte der Gesamtqualität einer Person signalisieren. Um die Schlussfolgerungen unserer Ergebnisse zu stützen, können zukünftige Studien untersuchen, ob die Variation der Gesichtsattraktivität einen Einfluss auf Stimmattraktivität hat.
description: Research suggests that the perception of attractiveness is multimodal, but it is unclear how visual and auditory cues interact. Voice pitch seems important, as men judge high-pitched female voices to be more attractive, possibly due to their association with youthfulness, health, and femininity. We investigated whether an increase in voice pitch in female voices would lead to increased ratings of attractiveness, femininity, and health, and decreased age ratings. 63 male participants were tested in a within-subject design in which both female voices (audio-block) and short videoclips of female faces with their associated voices (audio- visual block) were presented. We found that higher-pitched female voices were rated more attractive, more feminine, and younger, but not healthier compared to non-manipulated voices. However, when manipulated and control voices were presented simultaneously with synchronized face videos, these effects were absent. These results support the multiple- message hypothesis that voices and faces signal different aspects of an individual’s overall quality. Further experiments will examine the effect of face attractiveness manipulations on voice ratings.