cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Study of exclusive photoproduction of charmonium in ultra-peripheral lead-lead collisions
Creators: name: LHCb Collaboration
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The cross-sections of exclusive (coherent) photoproduction $J/ψ$ and $ψ(\mathrm{2S})$ mesons in ultra-peripheral PbPb collisions at a nucleon-nucleon centre-of-mass energy of $5.02\,\mathrm{TeV}$ are measured using a data sample corresponding to an integrated luminosity of $228\pm10\,\mathrm{μb}^{-1}$, collected by the LHCb experiment in 2018. The differential cross-sections are measured separately as a function of transverse momentum and rapidity in the nucleus-nucleus centre-of-mass frame for $J/ψ$ and $ψ(\mathrm{2S})$ mesons. The integrated cross-sections are measured to be \mbox{$σ^\mathrm{coh}_{J/ψ} = 5.965 \pm 0.059 \pm 0.232 \pm 0.262\,\mathrm{mb}$} and \mbox{$σ^\mathrm{coh}_{ψ(\mathrm{2S})} = 0.923 \pm 0.086 \pm 0.028 \pm 0.040\,\mathrm{mb}$}, where the first listed uncertainty is statistical, the second systematic and the third due to the luminosity determination. The cross-section ratio is measured to be \mbox{$σ^\mathrm{coh}_{ψ(\mathrm{2S})}/σ^\mathrm{coh}_{J/ψ} = 0.155 \pm 0.014 \pm 0.003$}, where the first uncertainty is statistical and the second is systematic. These results are compatible with theoretical predictions.
description: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-012.html (LHCb public pages)
Enhanced Electron Mixing and Heating in 3D Asymmetric Reconnection at the Earth's Magnetopause
Creators: name: Le, Ari
name: Daughton, William
name: Chen, Li-Jen
name: Egedal, Jan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Electron heating and mixing during asymmetric reconnection are studied with a 3D kinetic simulation that matches plasma parameters from Magnetospheric Multiscale (MMS) spacecraft observations of a magnetopause diffusion region. The mixing and heating are strongly enhanced across the magnetospheric separatrix compared to a 2D simulation. The transport of particles across the separatrix in 3D is attributed to lower-hybrid drift turbulence excited at the steep density gradient near the magnetopause. In the 3D simulation (and not the 2D simulation), the electron temperature parallel to the magnetic field within the mixing layer is significantly higher than its upstream value in agreement with the MMS observations.
La convivencia como requisito para el reconocimiento de la pensión de sobrevivientes y la sustitución pensional
Creators: name: González Manrique, Uriel
Publisher: name: Universidad Externado de Colombia
Year: 2024
Subjects: subject: Seguridad social - Colombia
subject: Pensiones - Legislación
subject: Cónyuges - Aspectos jurídicos
subject: Convivencia
subject: Pensión de sobrevivientes
subject: Sustitución pensional
subject: Compañera(o) permanente
subject: Familia tradicional

description: Se realiza una descripción del concepto de familia y su relevancia en materia de seguridad social. Contiene una exposición histórica sobre las normas que prevén el derecho a la pensión de sobrevivientes y a la sustitución pensional, acompañada de un análisis sobre la validez y completitud de la disposición. Se plantea como tema central el requisito de convivencia, como criterio distintivo de la familia. Además, en relación con la definición de convivencia, se realiza una descripción completa y detallada, tanto de su concepto etimológico como de los elementos y connotaciones originadas en la jurisprudencia del Consejo de Estado, de la Corte Suprema de Justicia y de la Corte Constitucional, lo que aporta a la resolución de conflictos de la seguridad social en los que se solicita la pensión de sobrevivientes o la sustitución pensional y es trascendental determinar qué se entiende por convivencia con el afiliado o pensionado.
description: A description of the concept of family and its relevance in terms of social security is made. It contains a historical exposition on the rules that provide for the right to a survivor's pension and pension replacement, accompanied by an analysis of the validity and completeness of the provision. The requirement of coexistence is raised as a central theme, as a distinctive criterion of the family. Furthermore, in relation to the definition of coexistence, a complete and detailed description is made, both of its etymological concept and of the elements and connotations originated in the jurisprudence of the Council of State, the Supreme Court of Justice and the Constitutional Court, what it contributes to the resolution of social security conflicts in which the survivors' pension or pension replacement is requested and it is essential to determine what is meant by coexistence with the member or pensioner.
Extinction phase transitions in a model of ecological and evolutionary dynamics
Creators: name: Barghathi, Hatem
name: Tackkett, Skye
name: Vojta, Thomas
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: We study the non-equilibrium phase transition between survival and extinction of spatially extended biological populations using an agent-based model. We especially focus on the effects of global temporal fluctuations of the environmental conditions, i.e., temporal disorder. Using large-scale Monte-Carlo simulations of up to $3\times 10^7$ organisms and $10^5$ generations, we find the extinction transition in time-independent environments to be in the well-known directed percolation universality class. In contrast, temporal disorder leads to a highly unusual extinction transition characterized by logarithmically slow population decay and enormous fluctuations even for large populations. The simulations provide strong evidence for this transition to be of exotic infinite-noise type, as recently predicted by a renormalization group theory. The transition is accompanied by temporal Griffiths phases featuring a power-law dependence of the life time on the population size.
description: 10 pages, 15 figures included, final version as published
Connecting processes with indefinite causal order and multi-time quantum states
Creators: name: Silva, Ralph
name: Guryanova, Yelena
name: Short, Anthony J.
name: Skrzypczyk, Paul
name: Brunner, Nicolas
name: Popescu, Sandu
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently, the possible existence of quantum processes with indefinite causal order has been extensively discussed, in particular using the formalism of process matrices. Here we give a new perspective on this question, by establishing a direct connection to the theory of multi-time quantum states. Specifically, we show that process matrices are equivalent to a particular class of pre- and post- selected quantum states. This offers a new conceptual point of view to the nature of process matrices. Our results also provide an explicit recipe to experimentally implement any process matrix in a probabilistic way, and allow us to generalize some of the previously known properties of process matrices. Furthermore we raise the issue of the difference between the notions of indefinite temporal order and indefinite causal order, and show that one can have indefinite causal order even with definite temporal order.
description: 10 pages, 4 figures
A Theoretical Framework for Lagrangian Descriptors
Creators: name: Lopesino, Carlos
name: Balibrea-Iniesta, Francisco
name: García-Garrido, Víctor J.
name: Wiggins, Stephen
name: Mancho, Ana M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: This paper provides a theoretical background for Lagrangian Descriptors (LDs). The goal of achieving rigourous proofs that justify the ability of LDs to detect invariant manifolds is simplified by introducing an alternative definition for LDs. The definition is stated for $n$-dimensional systems with general time dependence, however we rigorously prove that this method reveals the stable and unstable manifolds of hyperbolic points in four particular 2D cases: a hyperbolic saddle point for linear autonomous systems, a hyperbolic saddle point for nonlinear autonomous systems, a hyperbolic saddle point for linear nonautonomous systems and a hyperbolic saddle point for nonlinear nonautonomous systems. We also discuss further rigorous results which show the ability of LDs to highlight additional invariants sets, such as $n$-tori. These results are just a simple extension of the ergodic partition theory which we illustrate by applying this methodology to well-known examples, such as the planar field of the harmonic oscillator and the 3D ABC flow. Finally, we provide a thorough discussion on the requirement of the objectivity (frame-invariance) property for tools designed to reveal phase space structures and their implications for Lagrangian descriptors.
Beyond Fish and Bicycles: Exploring the Varieties of Online Women's Ideological Spaces
Creators: name: Balci, Utkucan
name: Ling, Chen
name: De Cristofaro, Emiliano
name: Squire, Megan
name: Stringhini, Gianluca
name: Blackburn, Jeremy
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computers and Society (cs.CY)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: The Internet has been instrumental in connecting under-represented and vulnerable groups of people. Platforms built to foster social interaction and engagement have enabled historically disenfranchised groups to have a voice. One such vulnerable group is women. In this paper, we explore the diversity in online women's ideological spaces using a multi-dimensional approach. We perform a large-scale, data-driven analysis of over 6M Reddit comments and submissions from 14 subreddits. We elicit a diverse taxonomy of online women's ideological spaces, ranging from counterparts to the so-called Manosphere to Gender-Critical Feminism. We then perform content analysis, finding meaningful differences across topics and communities. Finally, we shed light on two platforms, ovarit.com and thepinkpill.co, where two toxic communities of online women's ideological spaces (Gender-Critical Feminism and Femcels) migrated after their ban on Reddit.
MPEC 2023-P61 : 2023 PV
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 PV

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Classical surrogates for quantum learning models
Creators: name: Schreiber, Franz J.
name: Eisert, Jens
name: Meyer, Johannes Jakob
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The advent of noisy intermediate-scale quantum computers has put the search for possible applications to the forefront of quantum information science. One area where hopes for an advantage through near-term quantum computers are high is quantum machine learning, where variational quantum learning models based on parametrized quantum circuits are discussed. In this work, we introduce the concept of a classical surrogate, a classical model which can be efficiently obtained from a trained quantum learning model and reproduces its input-output relations. As inference can be performed classically, the existence of a classical surrogate greatly enhances the applicability of a quantum learning strategy. However, the classical surrogate also challenges possible advantages of quantum schemes. As it is possible to directly optimize the ansatz of the classical surrogate, they create a natural benchmark the quantum model has to outperform. We show that large classes of well-analyzed re-uploading models have a classical surrogate. We conducted numerical experiments and found that these quantum models show no advantage in performance or trainability in the problems we analyze. This leaves only generalization capability as possible point of quantum advantage and emphasizes the dire need for a better understanding of inductive biases of quantum learning models.
description: 4 pages, 3 figures
Vedānta Deśika's Dramidopaniṣad : presentation of a Tamil masterwork to a Sanskrit audience
Creators: name: Cauble, Marguerite Kate
Publisher: name: The University of Texas at Austin
Year: 2005
Subjects: Dramiḍopaniṣat Tātparyaratnāvaḷi
Sāra
Vedānta Deśika
Tamil poetry

description: This thesis is a translation and analysis of the Sanskrit poem Dramiḍopaniṣat Tātparyaratnāvaḷi and Sāra by the South Indian philosopher Vedānta Deśika, itself an interpretive translation of the Tamil poem-cycle Tiruvāymoḻi by the medieval poet-saint Nammāḻvār. The history of the religious movements behind both poems and the tradition of calling the Tiruvāymoḻi the “Tamil Veda” are discussed, along with both a poetic analysis of the Sanskrit work and a discussion of the ideas it contains. Vedānta Deśika’s beliefs about and motives for translating the Tiruvāymoḻi are analyzed alongside a treatment of the extent to which he inserted his own beliefs into the translation, attributing them to Nammāḻvār
Probing non-thermal density fluctuations in the one-dimensional Bose gas
Creators: name: De Nardis, Jacopo
name: Panfil, Miłosz
name: Gambassi, Andrea
name: Cugliandolo, Leticia F.
name: Konik, Robert
name: Foini, Laura
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Quantum integrable models display a rich variety of non-thermal excited states with unusual properties. The most common way to probe them is by performing a quantum quench, i.e., by letting a many-body initial state unitarily evolve with an integrable Hamiltonian. At late times, these systems are locally described by a generalized Gibbs ensemble with as many effective temperatures as their local conserved quantities. The experimental measurement of this macroscopic number of temperatures remains elusive. Here we show that they can be obtained by probing the dynamical structure factor of the system after the quench and by employing a generalized fluctuation-dissipation theorem that we provide. Our procedure allows us to completely reconstruct the stationary state of a quantum integrable system from state-of-the-art experimental observations.
description: 17 pages + appendices
title: Smartphones und Tablets als Verkaufsunterstützung im stationären Handel
title: Mitarbeiterakzeptanz im Mode- und Freizeiteinzelhandel
titleType: Subtitle
Creators: name: Schütz, Isabella
Publisher: name: FH CAMPUS 02 (CAMPUS 02 Fachhochschule der Wirtschaft)
Year: 2024
Subjects: subject: 658 Allgemeines Management

description: Der Einsatz von Technologien im Mode- und Freizeiteinzelhandel nimmt zu und verändert die Art und Weise, wie das Verkaufspersonal arbeitet und die Kundschaft einkauft. Die Kundschaft erwartet sich von einem modernen Einzelhandelsunternehmen ein nahtloses Einkaufserlebnis. Dies mündet in Kundenerlebnis und das wiederum ist eine wichtige Differenzierung zum Wettbewerb. Differenzierung erfolgt nicht nur durch den Einsatz von Technologien am Point of Sale (POS), sondern auch durch das Verkaufspersonal. Aus diesem Grund ist es von großer Bedeutung, dass das Verkaufspersonal dementsprechend mit der Technologie am POS vertraut ist und diese akzeptiert und anwendet. Viele Technologien fungieren als Verkaufsunterstützung und tragen zum Erfolg des Unternehmens bei. Ziel dieser Masterarbeit ist es, die Akzeptanz des stationären Verkaufspersonals im Mode- und Freizeiteinzelhandel in Österreich gegenüber den eingesetzten verkaufsunterstützenden Technologien, durch Smartphone und Tablet, am POS zu untersuchen. Eine quantitative online Befragung, auf Basis des Technology Acceptance Modell von Davis (1989) gibt Aufschluss darüber, ob Smartphones und Tablets als Verkaufsunterstützung angenommen oder abgelehnt werden. Des Weiteren zeigen die Ergebnisse, ob externe Faktoren wie Alter oder Position des Verkaufspersonals einen Einfluss auf die Akzeptanz haben.
description: The use of technology in fashion retail is increasing and changing the way sales staff work and customers shop. Customers expect a seamless shopping experience from a modern retailer. This translates into customer experience and this in turn is an important differentiator from the competition. Differentiation is not only through the use of technology at the Point of Sale (POS), but also through the sales force. For this reason, it is of great importance that the sales staff is accordingly familiar with the technology at the POS and accepts and uses it. Many technologies function as sales support and contribute to the success of the company. The aim of this master's thesis is to investigate the acceptance of stationary sales staff in fashion and leisure retail in Austria towards the sales-supporting technologies used by smartphones and tablets at the POS. A quantitative online survey based on the Technology Acceptance Model by Davis (1989) provides information on whether smartphones and tablets are accepted or rejected as sales support. Furthermore, the results show whether external factors such as age or position of the sales staff have an influence on acceptance.
Asymptotic-Preserving Neural Networks for multiscale hyperbolic models of epidemic spread
Creators: name: Bertaglia, Giulia
name: Lu, Chuan
name: Pareschi, Lorenzo
name: Zhu, Xueyu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: Machine Learning (cs.LG)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: When investigating epidemic dynamics through differential models, the parameters needed to understand the phenomenon and to simulate forecast scenarios require a delicate calibration phase, often made even more challenging by the scarcity and uncertainty of the observed data reported by official sources. In this context, Physics-Informed Neural Networks (PINNs), by embedding the knowledge of the differential model that governs the physical phenomenon in the learning process, can effectively address the inverse and forward problem of data-driven learning and solving the corresponding epidemic problem. In many circumstances, however, the spatial propagation of an infectious disease is characterized by movements of individuals at different scales governed by multiscale PDEs. This reflects the heterogeneity of a region or territory in relation to the dynamics within cities and in neighboring zones. In presence of multiple scales, a direct application of PINNs generally leads to poor results due to the multiscale nature of the differential model in the loss function of the neural network. To allow the neural network to operate uniformly with respect to the small scales, it is desirable that the neural network satisfies an Asymptotic-Preservation (AP) property in the learning process. To this end, we consider a new class of AP Neural Networks (APNNs) for multiscale hyperbolic transport models of epidemic spread that, thanks to an appropriate AP formulation of the loss function, is capable to work uniformly at the different scales of the system. A series of numerical tests for different epidemic scenarios confirms the validity of the proposed approach, highlighting the importance of the AP property in the neural network when dealing with multiscale problems especially in presence of sparse and partially observed systems.
Enabling Research through the SCIP Optimization Suite 8.0
Creators: name: Bestuzheva, Ksenia
name: Besançon, Mathieu
name: Chen, Wei-Kun
name: Chmiela, Antonia
name: Donkiewicz, Tim
name: van Doornmalen, Jasper
name: Eifler, Leon
name: Gaul, Oliver
name: Gamrath, Gerald
name: Gleixner, Ambros
name: Gottwald, Leona
name: Graczyk, Christoph
name: Halbig, Katrin
name: Hoen, Alexander
name: Hojny, Christopher
name: van der Hulst, Rolf
name: Koch, Thorsten
name: Lübbecke, Marco
name: Maher, Stephen J.
name: Matter, Frederic
name: Mühmer, Erik
name: Müller, Benjamin
name: Pfetsch, Marc E.
name: Rehfeldt, Daniel
name: Schlein, Steffan
name: Schlösser, Franziska
name: Serrano, Felipe
name: Shinano, Yuji
name: Sofranac, Boro
name: Turner, Mark
name: Vigerske, Stefan
name: Wegscheider, Fabian
name: Wellner, Philipp
name: Weninger, Dieter
name: Witzig, Jakob
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 90C05, 90C10, 90C11, 90C30, 90C90, 65Y05

description: The SCIP Optimization Suite provides a collection of software packages for mathematical optimization centered around the constraint integer programming framework SCIP. The focus of this paper is on the role of the SCIP Optimization Suite in supporting research. SCIP's main design principles are discussed, followed by a presentation of the latest performance improvements and developments in version 8.0, which serve both as examples of SCIP's application as a research tool and as a platform for further developments. Further, the paper gives an overview of interfaces to other programming and modeling languages, new features that expand the possibilities for user interaction with the framework, and the latest developments in several extensions built upon SCIP.
description: arXiv admin note: substantial text overlap with arXiv:2112.08872
Distinguishing between Dirac and Majorana neutrinos in the presence of general interactions
Creators: name: Rodejohann, Werner
name: Xu, Xun-Jie
name: Yaguna, Carlos E.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We revisit the possibility of distinguishing between Dirac and Majorana neutrinos via neutrino-electron elastic scattering in the presence of all possible Lorentz-invariant interactions. Defining proper observables, certain regions of the parameter space can only be reached for Dirac neutrinos, but never for Majorana neutrinos, thus providing an alternative method to differentiate these two possibilities. We first derive analytically and numerically the most general conditions that would allow to distinguish Dirac from Majorana neutrinos, both in the relativistic and non-relativistic cases. Then, we apply these conditions to data on $ν_μ$-$e$ and $\barν_e$-$e$ scatterings, from the CHARM-II and TEXONO experiments, and find that they are consistent with both types of neutrinos. Finally, we comment on future prospects of this kind of tests.
description: Comments added, version to appear in JHEP
Integral closures of powers of sums of ideals
Creators: name: Banerjee, Arindam
name: Ha, Huy Tai
Publisher: name: arXiv
Year: 2022
Subjects: subject: Commutative Algebra (math.AC)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 13C13, 90C05, 13D07

description: Let $k$ be a field, let $A$ and $B$ be polynomial rings over $k$, and let $S= A \otimes_k B$. Let $I \subseteq A$ and $J \subseteq B$ be monomial ideals. We establish a binomial expansion for rational powers of $I+J \subseteq S$ in terms of those of $I$ and $J$. Particularly, for a positive rational number $u$, we prove that $(I+J)_u = \sum_{0 \le ω\le u, \ ω\in \mathbb{Q}} I_ωJ_{u-ω},$ and that the sum on the right hand side is a finite sum. This finite sum can be made more precise using jumping numbers of rational powers of $I$ and $J$. We further give sufficient conditions for this formula to hold for the integral closures of powers of $I+J$ in terms of those of $I$ and $J$. Under these conditions, we provide explicit formulas for the depth and regularity of $\overline{(I+J)^k}$ in terms of those of powers of $I$ and $J$.
description: revision added connections to jumping numbers; 14 pages
Anesthesia in Emergency Radiology: Practical Considerations
Creators: name: Jesse Lawrence
Publisher: name: Zenodo
Year: 2022

description: This study delves into the practical considerations and challenges associated with administering anesthesia in emergency radiology settings. Focused on optimizing patient safety, procedural efficiency, and collaboration between anesthesiologists and radiologists, the research explores key aspects of anesthesia delivery during urgent imaging interventions. The study aims to provide valuable insights for healthcare professionals involved in emergency radiology and anesthesia, ultimately contributing to improved patient care in critical situations.
Winding theta and destructive interference of instantons
Creators: name: Nguyen, Mendel
name: Tanizaki, Yuya
name: Ünsal, Mithat
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: While the $θ$ dependence of field theories is $2π$ periodic, the ground-state wavefunctions at $θ$ and $θ+2π$ often belong to different classes of symmetry-protected topological states. When this is the case, a continuous change of the $θ$ parameter can introduce an interface that supports a nontrivial field theory localized on the wall. We consider the $2$d $\mathbb{C}P^{N-1}$ sigma model as an example and construct a weak-coupling setup of this interface theory by considering the small $S^1$ compactification with nonzero winding $θ$ parameter and a suitable symmetry-twisted boundary condition. This system has $N$ classical vacua connected by fractional instantons, but the anomaly constraint tells us that the fractional-instanton amplitudes should vanish completely to have $N$-fold degeneracy at the quantum level. We show how this happens in this purely bosonic system, uncovering that the integration over the zero modes annihilates the fractional instanton amplitudes, which is sharp contrast to what happens when the $θ$ angle is constant. Moreover, we provide another explanation of this selection rule by showing that the $N$ perturbative vacua acquire different charges under the global symmetry with the activation of the winding $θ$ angle. We also demonstrate a similar destructive interference between instanton effects in the $\mathbb{C}P^{N-1}$ quantum mechanics with the Berry phase.
description: 35 pages, 3 figures. V2 minor edits
Quantum ghost imaging of a transparent polarisation sensitive phase pattern
Creators: name: Saxena, Aditya
name: Kaur, Manpreet
name: Devrari, Vipin
name: Singh, Mandip
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A transparent polarisation sensitive phase pattern exhibits a position and polarisation dependent phase shift of transmitted light and it represents a unitary transformation. A quantum ghost image of this pattern is produced with hyper-entangled photons consisting of Einstein-Podolsky-Rosen (EPR) and polarisation entanglement. In quantum ghost imaging, a single photon interacts with the pattern and is detected by a stationary detector and a non-interacting photon is imaged on a coincidence camera. EPR entanglement manifests spatial correlations between an object plane and a ghost image plane, whereas a polarisation dependent phase shift exhibited by the pattern is detected with polarisation entanglement. In this quantum ghost imaging, the which-position-polarisation information of a photon interacting with the pattern is not present in the experiment. A quantum ghost image is constructed by measuring correlations of the polarisation-momentum of an interacting photon with polarisation-position of a non-interacting photon. The experiment is performed with a coincidence single photon detection camera, where a non-interacting photon travels a long optical path length of 17.83~$m$ from source to camera and a pattern is positioned at an optical distance of 19.16~$m$ from the camera.
description: 10 pages, 4 figures
title: Speech Entrainment in Neurotypical Adolescents
Creators: name: Wynn, Camille Jane
Publisher: name: Utah State University
Year: 2022

description: Conversation plays a vital role in the lives of adolescents. Through conversation, adolescents establish meaningful connections, develop friendships, and learn social skills they will use the rest of their lives. Therefore, there is a recognized need to understand the conversational patterns of this age group. One conversational skill that may be important in adolescent conversations is that of speech entrainment. Defined as the similarity of behaviors between conversation partners, there is strong theoretical rationale to suggest this phenomenon develops during adolescence and may be an important component of successful adolescent conversations. However there is little in the way of empirical evidence to highlight the specific developmental trajectory or actual benefits of entrainment for this age group. Accordingly, the purpose of this study is to characterize the speech entrainment patterns of early adolescents. To do this, we examine the entrainment patterns in a corpus of 96 task-based conversations between neurotypical adolescents between the ages of 9 and 14 years and a comparison corpus of 16 task-based conversations between neurotypical adults. Our findings show that entrainment skills develop across early adolescents with continued development likely extending into mid-and/or late-adolescence. Additionally, our results point to the importance of speech entrainment in promoting successful conversations in this age group. Accordingly, through this project, we set the stage for continued research investigating the role of speech entrainment in neurotypical and neurodiverse adolescent populations.
Aplicación del incentivo de limitación a los procesos de la contratación pública a las micro, pequeñas y medianas empresas en los acuerdos marco de precios de Colombia compra eficiente en virtud de la contratación estatal
Creators: name: Sangregorio Guarnizo, Valerie
Publisher: name: Universidad Externado de Colombia
Year: 2024
Subjects: subject: Contratos públicos - Legislación
subject: Compras - Aspectos económicos
subject: Interpretación del derecho - Aspectos jurídicos
subject: Mipymes
subject: Compras públicas
subject: Instrumento de agregación de demanda, y acuerdo
subject: Marco de precios

description: Este texto se sumerge en la realidad especifica de la contratación pública en Colombia, resaltando la importancia de las MiPymes para la economía nacional, pero también, poniendo de presente los diferentes desafíos que han sido impuestos a estos actores de la economía en torno a su creación, crecimiento y duración para ser parte de procesos de selección objetiva con el Estado colombiano. A través del presente, se tiene el propósito de abordar la realidad de las MiPymes en Colombia de acuerdo con la implementación de los AMP y la afectación que esta modalidad genera en el acercamiento de las MiPymes a la contratación con el Estado.
description: This text delves into the specific reality of public procurement in Colombia, highlighting the importance of MiPymes (Micro, Small, and Medium-sized Enterprises) for the national economy. However, it also brings to light the different challenges that have been imposed on these actors of the economy regarding its establishment, growth, and sustainability to become part of objective selection processes with the Colombian government. Through this, the purpose is to address the reality of MiPymes in Colombia in accordance with the implementation of AMPs (Affirmative Measures Programs) and the impact that this modality has on the approach of MiPymes to contracting with the State.
A Low-Mass Exoplanet Candidate Detected By ${\it K2}$ Transiting the Praesepe M Dwarf JS 183
Creators: name: Pepper, Joshua
name: Gillen, Ed
name: Parviainen, Hannu
name: Hillenbrand, Lynne A.
name: Cody, Ann Marie
name: Aigrain, Suzanne
name: Stauffer, John
name: Vrba, Frederick J.
name: David, Trevor
name: Lillo-Box, Jorge
name: Stassun, Keivan G.
name: Conroy, Kyle E.
name: Pope, Benjamin J. S.
name: Barrado, David
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report the discovery of a repeating photometric signal from a low-mass member of the Praesepe open cluster that we interpret as a Neptune-sized transiting planet. The star is JS 183 (HSHJ 163, EPIC 211916756) with $T_{\rm eff} = 3325\pm100$ K, $M_{*} = 0.44\pm0.04$ $M_{\odot}$, $R_{*} = 0.44\pm0.03$ $R_{\odot}$, and $\log{g_*} = 4.82\pm0.06$. The planet has an orbital period of 10.134588 days and a radius of $R_{P}= 0.32\pm0.02$ $R_J$. Since the star is faint at $V=16.5$ and $J=13.3$, we are unable to obtain a measured radial-velocity orbit, but we can constrain the companion mass to below about 1.7 $M_J$, and thus well below the planetary boundary. JS 183b (since designated as K2-95b) is the second transiting planet found with ${\it K2}$ that resides in a several hundred Myr open cluster; both planets orbit mid-M dwarf stars and are approximately Neptune-sized. With a well-determined stellar density from the planetary transit, and with an independently known metallicity from its cluster membership, JS 183 provides a particularly valuable test of stellar models at the fully convective boundary. We find that JS 183 is the lowest-density transit host known at the fully convective boundary, and that its very low density is consistent with current models of stars just above the fully convective boundary but in tension with the models just below the fully convective boundary.
description: 30 pages, 11 figures, Accepted for publication in the Astronomical Journal
title: Entwicklung eines materiellen Leistungsanreizsystems im Finanzdienstleistungsvertrieb B2C für die Generation X
Creators: name: Reiter-Haas, Lukas
Publisher: name: FH CAMPUS 02 (CAMPUS 02 Fachhochschule der Wirtschaft)
Year: 2024
Subjects: subject: 658 Allgemeines Management

description: Unternehmen sind aufgrund des vorherrschenden Fachkräftemangels sowie des dynamischen Wettbewerbsumfelds gefordert Mitarbeiter*innen nachhaltig an ihr Unternehmen zu binden. Mitarbeiter*innen der Generation X stellen dabei jene Gruppe dar, die aufgrund ihrer Erfahrung einen wesentlichen Beitrag zum Unternehmenserfolg leisten. Ziel der Unternehmensführung muss es daher sein, Mitarbeiter*innen der Generation X durch gezielte Maßnahmen zu motivieren und dadurch ihre Unternehmensziele zu erreichen. Eine Maßnahme zur Motivationssteigerung stellt die Entwicklung und Einführung eines materiellen Leistungsanreizsystems dar. Ziel dieser Arbeit war zu erforschen, welche materiellen Leistungsanreize bei Finanzdienstleistungsvertriebsmitarbeiter*innen B2C für die Generation X zu einer Leistungssteigerung führen. Aus den theoretischen und empirischen Untersuchungen ging hervor, dass der wichtigste materielle Leistungsanreiz zur Leistungssteigerung für Vertriebsmitarbeiter*innen der Generation X die Geldzuwendung ist. Dienstfahrzeuge für die private Nutzung und der Erhalt von zusätzlichen Urlaubstagen sind weitere materielle Anreize die Vertriebsmitarbeiter*innen besonders motivieren. Durch einen gezielten Einsatz von einem materiellen Leistungsanreizsystem gelingt es Unternehmen einen Wettbewerbsvorteil zu generieren, indem erfahrene Vertriebsmitarbeiter*innen aus der Generation X länger an ihr Unternehmen gebunden werden.
description: Due to the prevailing shortage of skilled workers and the dynamic competitive environment, companies are challenged to retain employees in the long term. Generation X employees represent the group that makes a significant contribution to the company's success due to their experience. The goal of corporate management must therefore be to motivate Generation X employees through targeted measures and thereby achieve their corporate goals. One measure to increase motivation is the development and introduction of a material performance incentive system. The aim of this work was to investigate which material performance incentives lead to an increase in performance for Generation X financial services sales employees. From the theoretical and empirical studies it emerged that the most important material incentive for performance enhancement for Generation X sales employees is the cash allowance. Company cars for private use and the receipt of additional holiday days are further material incentives that particularly motivate sales employees. Through the targeted use of a material performance incentive system, companies can generate a competitive advantage by retaining experienced sales employees from Generation X for longer.
Anomalous Thermal Expansion, Negative Linear Compressibility and High-Pressure Phase Transition in ZnAu2(CN)4: Neutron Inelastic Scattering and Lattice Dynamics Studies
Creators: name: Gupta, Mayanak K.
name: Singh, Baltej
name: Mittal, Ranjan
name: Zbiri, Mohamed
name: Cairns, Andrew B.
name: Goodwin, Andrew L.
name: Schober, Helmut
name: Chaplot, Samrath L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present temperature dependent inelastic neutron scattering measurments, accompanied byab-initio calculations of phonon spectra and elastic properties as a function of pressure to understand anharmonicity of phonons and to study the mechanism of negative thermal expansion and negative linear compressibility behaviour of ZnAu2(CN)4. The mechanism is identified in terms of specific anharmonic modes that involve bending of the Zn(CN)4-Au- Zn(CN)4 linkage. The high-pressure phase transition at about 2 GPa is also investigated and found to be related to softening of a phonon mode at the L-point at the Brillouin zone boundary and its coupling with a zone-centre phonon and an M-point phonon in the ambient pressure phase. Although the phase transition is primarily driven by a L-point soft phonon mode, which usually leads to a second order transition with a 2 x 2 x 2 supercell, in the present case the structure is close to an elastic instability that leads to a weakly first order transition.
description: 26 Pages, 12 Figures
FedACK: Federated Adversarial Contrastive Knowledge Distillation for Cross-Lingual and Cross-Model Social Bot Detection
Creators: name: Yang, Yingguang
name: Yang, Renyu
name: Peng, Hao
name: Li, Yangyang
name: Li, Tong
name: Liao, Yong
name: Zhou, Pengyuan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Social bot detection is of paramount importance to the resilience and security of online social platforms. The state-of-the-art detection models are siloed and have largely overlooked a variety of data characteristics from multiple cross-lingual platforms. Meanwhile, the heterogeneity of data distribution and model architecture makes it intricate to devise an efficient cross-platform and cross-model detection framework. In this paper, we propose FedACK, a new federated adversarial contrastive knowledge distillation framework for social bot detection. We devise a GAN-based federated knowledge distillation mechanism for efficiently transferring knowledge of data distribution among clients. In particular, a global generator is used to extract the knowledge of global data distribution and distill it into each client's local model. We leverage local discriminator to enable customized model design and use local generator for data enhancement with hard-to-decide samples. Local training is conducted as multi-stage adversarial and contrastive learning to enable consistent feature spaces among clients and to constrain the optimization direction of local models, reducing the divergences between local and global models. Experiments demonstrate that FedACK outperforms the state-of-the-art approaches in terms of accuracy, communication efficiency, and feature space consistency.
description: Accepted by the ACM Web Conference 2023 (WWW'23)
Diagnóstico del comercio internacional de Colombia con China desde su inserción en la Alianza Pacífico
Creators: name: Plata Fernandez, Valery Lorena
Publisher: name: Universidad Externado de Colombia
Year: 2024
Subjects: subject: Relaciones comerciales - Aspectos jurídicos
subject: Negocios del Estado - Legislación
subject: Evaluación económica - Comercio
subject: Integración económica
subject: Alianza del Pacífico
subject: Comercio Asia Pacífico
subject: Comercio internacional

description: El presente artículo académico quiere dar a conocer un diagnóstico, análisis y verificación del estado actual del comercio internacional de países del Asia pacífico y las relaciones comerciales de Colombia y China como principal socio, verificar si la inserción de Colombia en esta integración regional y sus objetivos de institución han servido para mejorar el comercio entre ambos países. En tal sentido, es menester identificar el Rol activo de la Alianza del pacífico como mecanismo de integración regional conformada por Colombia, Chile México y Perú, el cual se fundó con la pretensión de crear mercados atractivos entre los miembros para lograr una mayor competitividad a nivel internacional. De tal modo, así es como se pretende verificar y analizar la estructura actual y funcionalidad de la Alianza del Pacífico y comprender si la participación de Colombia como miembro es fructífera y útil para las empresas privadas colombianas en el cumplimiento de sus objetivos principales.
description: This academic article aims to present a diagnosis, analysis, and verification of the current state of international trade of Asia-Pacific countries and the commercial relations of Colombia and China as the main partner, verify if the insertion of Colombia in this regional integration and its institutional objectives have served to improve trade between both countries. In this sense, it is necessary to identify the active role of the Pacific Alliance as a regional integration mechanism formed by Colombia, Chile, Mexico, and Peru, which was founded with the aim of creating attractive markets among the members to achieve greater competitiveness at the international level. In this way, this is how it is intended to verify and analyze the current structure and functionality of the Pacific Alliance and understand if the participation of Colombia as a member is fruitful and useful for Colombian private companies in the fulfillment of their main objectives.
Analytic rotating black hole solutions in $N$-dimensional $f(T)$ gravity
Creators: name: Nashed, G. G. L.
name: Hanafy, W. El
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A non-diagonal vielbein ansatz is applied to the $N$-dimension field equations of $f(T)$ gravity. An analytical vacuum solution is derived for the quadratic polynomial $f(T)=T+εT^2$ in the presence of a cosmological constant $Λ$. Since the induced metric has off diagonal components, that cannot be removed by a mere of a coordinate transformation, the solution has a rotating parameter. The curvature and torsion scalars invariants are calculated to study the singularities and horizons of the solution. In contrast to the general relativity (GR), the Cauchy horizon is differ from the horizon which shows the effect of the higher order torsion. The general expression of the energy-momentum vector of $f(T)$ gravity is used to calculate the energy of the system. Finally, we have shown that this kind of solution satisfies the first law of thermodynamics in the framework of $f(T)$ gravitational theories.
description: 17 pages LaTex,Submitted to EPJC
Phenomenology of the Prethermal Many-Body Localized Regime
Creators: name: Long, David M.
name: Crowley, Philip J. D.
name: Khemani, Vedika
name: Chandran, Anushya
Publisher: name: arXiv
Year: 2022
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The dynamical phase diagram of interacting disordered systems has seen substantial revision over the past few years. Theory must now account for a large prethermal many-body localized (MBL) regime in which thermalization is extremely slow, but not completely arrested. We derive a quantitative description of these dynamics in short-ranged one-dimensional systems using a model of successive many-body resonances. The model explains the decay timescale of mean autocorrelators, the functional form of the decay - a stretched exponential - and relates the value of the stretch exponent to the broad distribution of resonance timescales. The Jacobi method of matrix diagonalization provides numerical access to this distribution, as well as a conceptual framework for our analysis. The resonance model correctly predicts the stretch exponents for several models in the literature. Successive resonances may also underlie slow thermalization in strongly disordered systems in higher dimensions, or with long-range interactions.
description: 7 pages, 3 figures + 9 pages, 9 figures; (v2) additional appendix on the absence of rare region effects, new numerical data for Heisenberg model autocorrelation functions and Floquet model decimated element distributions, other clarifications and corrections
Optical Limiting Performance of a GaAs/AlAs Heterostructure Microcavity in the Near-Infrared
Creators: name: Ryzhov, A. A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A multilayer GaAs/AlAs heterostructure forming a Fabry--Perot microcavity with a narrow resonance at 1.1~$μ$m was produced by molecular-beam epitaxy. Under nanosecond pulsed laser radiation, a blue shift of the resonant line, associated with a photo-induced negative change in refractive index in GaAs, was experimentally registered by using an optical parametric oscillator. The spectral shift was accompanied by a reduction in peak transmittance, associated with nonlinear intracavity absorption. Such a cavity can be used as an optical limiter at the resonant wavelength when both the spectral shift and the transmittance reduction contribute to the limiting effect. An exceptionally low limiting threshold of about 1 mJ/cm$^2$ was observed in the experiment.
description: 6 pages, 7 figures, uses RevTeX 4-1
Structure-Aware Methods for Expensive Derivative-Free Nonsmooth Composite Optimization
Creators: name: Larson, Jeffrey
name: Menickelly, Matt
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We present new methods for solving a broad class of bound-constrained nonsmooth composite minimization problems. These methods are specially designed for objectives that are some known mapping of outputs from a computationally expensive function. We provide accompanying implementations of these methods: in particular, a novel manifold sampling algorithm (\mspshortref) with subproblems that are in a sense primal versions of the dual problems solved by previous manifold sampling methods and a method (\goombahref) that employs more difficult optimization subproblems. For these two methods, we provide rigorous convergence analysis and guarantees. We demonstrate extensive testing of these methods. Open-source implementations of the methods developed in this manuscript can be found at \url{github.com/POptUS/IBCDFO/}.