cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
About [q]-regularity properties of collections of sets
Creators: name: Kruger, Alexander Y.
name: Thao, Nguyen H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We examine three primal space local Hoelder type regularity properties of finite collections of sets, namely, [q]-semiregularity, [q]-subregularity, and uniform [q]-regularity as well as their quantitative characterizations. Equivalent metric characterizations of the three mentioned regularity properties as well as a sufficient condition of [q]-subregularity in terms of Frechet normals are established. The relationships between [q]-regularity properties of collections of sets and the corresponding regularity properties of set-valued mappings are discussed.
description: arXiv admin note: substantial text overlap with arXiv:1309.7002
Equal contribution of place cells and non-place cells to the position decoding from one-photon imaging calcium transients
Creators: name: Ivantaev, Vladislav
name: Attardo, Alessio
name: Leibold, Christian
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Learning, plasticity and memory

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
Complex spatial representations and computations emerge in a memory-augmented network that learns to navigate
Creators: name: Zeng, Xiangshuai
name: Wiskott, Laurenz
name: Cheng, Sen
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Learning, plasticity and memory

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
Tunneling into the localized phase near Anderson transitions with Coulomb interaction
Creators: name: Burmistrov, I. S.
name: Gornyi, I. V.
name: Mirlin, A. D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the tunneling density of states (TDOS) of a disordered electronic system with Coulomb interaction on the insulating side of the Anderson localization transition. The average TDOS shows a critical behavior at high energies, with a crossover to a soft Coulomb gap $Δ$ at low energies. We demonstrate that the single-particle excitations experience a localization transition (which belongs to the noninteracting universality class) at an energy $E=\pm E_c$. The mobility edge $E_c$ scales with the distance $μ_c-μ$ from the interacting critical point according to $E_c\propto (μ_c-μ)^{νz}$, where $ν$ and $z$ are the localization-length and the dynamical critical exponents. Local TDOS shows strong fluctuations and long-range correlations which reflect the multifractality associated with interacting and noninteracting fixed points as well the localization of low-energy excitations.
description: 14 pages, 5 figures; to appear in Physical Review B
Ab-Initio Simulation of Field Evaporation
Creators: name: Qi, Jiayuwen
name: Oberdorfer, Christian
name: Marquis, Emmanuelle A.
name: Windl, Wolfgang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A new simulation approach of field evaporation is presented. The model combines classical electrostatics with molecular dynamics (MD) simulations. Unlike previous atomic-level simulation approaches, our method does not rely on an evaporation criterion based on thermal activation theory, instead, electric-field-induced forces on atoms are explicitly calculated and added to the interatomic forces. Atoms then simply move according to the laws of classical molecular dynamics and are "evaporated" when the external force overcomes interatomic bonding. This approach thus makes no ad-hoc assumptions concerning evaporation fields and criteria, which makes the simulation fully physics-based and "ab-initio" apart from the interatomic potential. As proof of principle, we perform simulations to determine material dependent critical voltages which allow assessing the evaporation fields and the corresponding steady-state tip shapes in different metals. We also extract critical evaporation fields in elemental metals and sublimation energies in a high entropy alloy to have a more direct comparison with tabulated values. In contrast to previous approaches, we show that our method is able to successfully reproduce the enhanced zone lines observed in experimental field desorption patterns. We also demonstrate the need for careful selection of the interatomic potential by a comparative study for the example of Cu-Ni alloys.
Analytic characterization of sub-Alfvénic turbulence energetics
Creators: name: Skalidis, R.
name: Tassis, K.
name: Pavlidou, V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Magnetohydrodynamic (MHD) turbulence is a cross-field process relevant to many systems. A prerequisite for understanding these systems is to constrain the role of MHD turbulence, and in particular the energy exchange between kinetic and magnetic forms. The energetics of strongly magnetized and compressible turbulence has so far resisted attempts to understand them. Numerical simulations reveal that kinetic energy can be orders of magnitude larger than fluctuating magnetic energy. We solve this lack-of-balance puzzle by calculating the energetics of compressible and sub-Alfvénic turbulence based on the dynamics of coherent cylindrical fluid parcels. Using the MHD Lagrangian, we prove analytically that the bulk of the magnetic energy transferred to kinetic is the energy stored in the coupling between the ordered and fluctuating magnetic field. The analytical relations are in striking agreement with numerical data, up to second order terms.
Role of non-ideality for the ion transport in porous media: derivation of the macroscopic equations using upscaling
Creators: name: Allaire, Gregoire
name: Brizzi, Robert
name: Dufreche, Jean-Francois
name: Mikelic, Andro
name: Piatnitski, Andrey
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: Geophysics (physics.geo-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35Q35, 35B27, 76S05, 35Q82, 35Q86

description: This paper is devoted to the homogenization (or upscaling) of a system of partial differential equations describing the non-ideal transport of a N-component electrolyte in a dilute Newtonian solvent through a rigid porous medium. Realistic non-ideal effects are taken into account by an approach based on the mean spherical approximation (MSA) model which takes into account finite size ions and screening effects. We first consider equilibrium solutions in the absence of external forces. In such a case, the velocity and diffusive fluxes vanish and the equilibrium electrostatic potential is the solution of a variant of Poisson-Boltzmann equation coupled with algebraic equations. Contrary to the ideal case, this nonlinear equation has no monotone structure. However, based on invariant region estimates for Poisson-Boltzmann equation and for small characteristic value of the solute packing fraction, we prove existence of at least one solution. To our knowledge this existence result is new at this level of generality. When the motion is governed by a small static electric field and a small hydrodynamic force, we generalize O'Brien's argument to deduce a linearized model. Our second main result is the rigorous homogenization of these linearized equations and the proof that the effective tensor satisfies Onsager properties, namely is symmetric positive definite. We eventually make numerical comparisons with the ideal case. Our numerical results show that the MSA model confirms qualitatively the conclusions obtained using the ideal model but there are quantitative differences arising that can be important at high charge or high concentrations.
description: 46 pages
On the possibility of testing the two-peak structure of the LHCb hidden-charm strange pentaquark $P_{cs}(4459)^0$ in near-threshold antikaon-induced charmonium production on protons and nuclei
Creators: name: Paryev, E. Ya.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Accounting for the LHCb observation that the reported hidden-charm strange pentaquark $P_{cs}(4459)^0$ can split into two substructures, $P_{cs}(4455)^0$ and $P_{cs}(4468)^0$, with a mass difference of 13 MeV as well as the newly observed hidden-charm pentaquark resonance $P_{cs}(4338)^0$ with strangeness, we study within the double-peak scenario for the $P_{cs}(4459)^0$ state the near-threshold $J/ψ$ meson production from protons and nuclei by considering incoherent direct non-resonant (${K^-}p \to {J/ψ}Λ$) and two-step resonant (${K^-}p \to P_{csi}^0 \to {J/ψ}Λ$, $i=1$, 2, 3; $P_{cs1}^{0}=P_{cs}(4338)^0$, $P_{cs2}^{0}=P_{cs}(4455)^0$, $P_{cs3}^{0}=P_{cs}(4468)^0$) charmonium production processes with the main goal of clarifying the possibility to observe within this scenario both above two substructures contributing to the $P_{cs}(4459)^0$ state and the $P_{cs}(4338)^0$ resonance in this production. We calculate the absolute excitation functions, energy and momentum distributions for the non-resonant, resonant and for the combined (non-resonant plus resonant) production of $J/ψ$ mesons on protons as well as on carbon and tungsten target nuclei at near-threshold incident antikaon beam momenta by assuming the spin-parity assignments of the hidden-charm resonances $P_{cs}(4338)^0$, $P_{cs}(4455)^0$ and $P_{cs}(4468)^0$ as $J^P=(1/2)^-$, $J^P=(1/2)^-$ and $J^P=(3/2)^-$ within four different realistic choices for the branching ratios of their decays to the ${J/ψ}Λ$ mode (0.125, 0.25, 0.5 and 1\%) as well as for two options for the branching fraction of their decays to the $K^-p$ channel (0.01 and 0.001\%). We show that these combined observables reveal clear sensitivity to these scenarios. Hence, they may be an important tool to provide further evidence for the existence of the above strange hidden-charm pentaquark resonances.
description: 30 pages, 13 figures; arXiv admin note: text overlap with arXiv:2211.16037, references and some additional comments are added
Lensing with generalized symmetrons
Creators: name: Käding, Christian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Generalized symmetrons are models that have qualitatively similar features to the archetypal symmetron, but have barely been studied. In this article, we investigate for what parameter values the fifth forces induced by disformally coupling generalized symmetrons can provide an explanation for the difference between baryonic and lens masses of galaxies. While it is known that the standard symmetron struggles with providing an alternative source for the lensing otherwise attributed to particle dark matter, we show that some generalized symmetron models are more suitable for complying with existing constraints on disformal couplings. This motivates future studies of these only little explored models.
description: 18 pages, 4 figures, as published in Astronomy
The D4/D8 model and holographic QCD
Creators: name: Li, Si-wen
name: Zhang, Xiao-tong
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: As a top-down holographic approach, the D4/D8 model is expected to be the holographic version of QCD since it almost includes all the elementary features of QCD based on string theory. In this manuscript, we review the fundamental properties of the D4/D8 model with respect to the D4-brane background, embedding of flavor branes and holographic quark, gluon, meson, baryon and glueball with various symmetries, then we also take a look at some interesting applications and developments based on this model.
description: 72 pages, 8 Figures, invited paper by Symmetry, add keywords and upgrade the references to this version
Knocking out co-active plasticity rules in neural networks reveals synapse type-specific contributions for learning and memory
Creators: name: Harrington, Zoe P.M.
name: Confavreux, Basile
name: Gonçalves, Pedro J.
name: Macke, Jakob H.
name: Vogels, Tim P.
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Learning, plasticity and memory

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
Improper origin of polar displacements at CaTiO3 and CaMnO3 Twin Walls
Creators: name: Barone, Paolo
name: Di Sante, Domenico
name: Picozzi, Silvia
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recent interests towards novel functionalities arising at domain walls of ferroic materials naturally call for a microscopic understanding. To this end, first-principles calculations have been performed in order to provide solid evidence of ferroelectricity in the twin walls of nonpolar CaTiO3 and magnetic CaMnO3. We show that ferroelectricity arises from rotation/tilting octahedral distortions --- cooperatively acting at the twin wall in both considered systems --- rather than from a proper secondary ferroelectric instability, as often believed. Our results are in excellent agreement with experimental observations of domain walls in CaTiO3. In addition, we show that magnetic properties at the twin wall in CaMnO3 are also modified, thus suggesting an unexplored route to achieve and detect multiferroic ordering in a single-phase material.
Influence of the deviation of the matter power spectrum at small scales on the global 21-cm signal at cosmic dawn
Creators: name: Yang, Yupeng
name: Li, Xiujuan
name: Li, Gang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The matter power spectrum has been strongly constrained by astronomical measurements at large scales, but only weakly at small scales. Compared with the standard scenario, the deviation of the matter power spectrum at small scales has influence on the cosmological structure formation, e.g., the comoving number density of dark matter halos. The thermal history of the intergalactic medium (IGM) can be changed if dark matter is made of weakly interacting massive particles and can annihilate into standard model particles. The changes of the evolution of IGM could leave imprints on the relevant astronomical observations. Taking into account the dark matter annihilation, we investigate the impact of the deviation of matter power spectrum at small scales on the global 21-cm signal. In view of the measurements of the global 21-cm signal by the EDGES experiment, we explore the allowed parameter space of $m_s$, which describes the degree of deviation, by requiring the differential brightness temperature of the global 21-cm signal $δT_{21} \le -50~\rm mK$ at redshift $z=17$.
description: 9 npages, 4 figures. comments welcome. Added some references
High power density energy harvesting devices based on the anomalous Nernst effect of Co/Pt magnetic multilayers
Creators: name: Lopez-Polin, Guillermo
name: Aramberri, Hugo
name: Marques-Marchan, Jorge
name: Weintrub, Benjamin I.
name: Bolotin, Kirill I.
name: Cerda, Jorge I.
name: Asenjo, Agustina
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The anomalous Nernst effect (ANE) is a thermomagnetic phenomenon with potential applications in thermal energy harvesting. While many recent works studied the approaches to increase the ANE coefficient of materials, relatively little effort was devoted to increasing the power supplied by the effect. Here we demonstrate a nanofabricated device with record power density generated by the ANE. To accomplish this, we fabricate micrometer-sized devices in which the thermal gradient is three orders of magnitude higher than conventional macroscopic devices. In addition, we use Co/Pt multilayers, a system characterized by a high ANE thermopower (~1 microV/K), low electrical resistivity, and perpendicular magnetic anisotropy. These innovations allow us to obtain power densities of around 13 W/cm3. We believe that this design may find uses in harvesting wasted energy in e.g. electronic devices.
Contrast-invariant orientation selectivity in a synthetic biology model of the early visual pathway
Creators: name: Vogel, Julian
name: Franz, Jonas
name: Schottdorf, Manuel
name: Shoham, Shy
name: Stühmer, Walter
name: Wolf, Fred
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Sensory processing and perception

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
Combinatorics of generalized Dyck and Motzkin paths
Creators: name: Gan, Li
name: Ouvry, Stéphane
name: Polychronakos, Alexios P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We relate the combinatorics of periodic generalized Dyck and Motzkin paths to the cluster coefficients of particles obeying generalized exclusion statistics, and obtain explicit expressions for the counting of paths with a fixed number of steps of each kind at each vertical coordinate. A class of generalized compositions of the integer path length emerges in the analysis.
description: 27 pages, 11 figures
title: Zur Konstitution von Ethik und Engagement im italienischen Autorenfilm der Gegenwart
Creators: name: Schmeißner, Katrin
Publisher: name: University Library Heidelberg
Year: 2011

description: Film critics continue to discuss social and political commitment as a central aspect of the nuovo cinema italiano without having provided any profound analysis on the issue to date. Due to the fact that this commitment is emphasized as clearly in neorealism (the “golden age” of Italian cinema) as in recent productions, it is worth analyzing the most characteristic elements of Italian cinema in both periods. This article examines Roma, città aperta (Roberto Rossellini, 1945), Agatha e la tempesta (Silvio Soldini, 2004), Buongiorno notte (Marco Bellocchio, 2004), Tutta la vita davanti (Paolo Virzí, 2008) and Le ragioni dell’aragosta (Sabina Guzzanti, 2007) and shows that both neorealist and postmodern Italian films obtain their ethical qualities through the interplay of stylistic and content-related categories. While the moral claim in neorealist cinema seems to be at risk, in recent productions – even in heterotopias – this realization often takes place on the part of female protagonists, which leads to a different activation of the viewer.
description: Forschungsansatz, -methode oder -verfahren: Filmanalyse
description: HeLix - Dossiers zur romanischen Literaturwissenschaft, Bd. 4 (2011): HeLix, Beginn und Erscheinungsfrequenz: Jahr: 2009, Ausgaben pro Band: 1, Bände pro Jahr: 2
Feshbach-type resonances for two-particle scattering in graphene
Creators: name: Gaul, C.
name: Domínguez-Adame, F.
name: Sols, F.
name: Zapata, I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Two-particle scattering in graphene is a multichannel problem, where the energies of the identical or opposite-helicity channels lie in disjoint energy segments. Due to the absence of Galilean invariance, these segments depend on the total momentum $Q$. The dispersion relations for the two opposite-helicity scattering channels are analogous to those of two one-dimensional tight-binding lattices with opposite dispersion relations, which are known to easily bind states at their edges. When an $s$-wave separable interaction potential is assumed, those bound states reveal themselves as three Feshbach resonances in the identical-helicity channel. In the limit $Q \rightarrow 0$, one of the resonances survives and the opposite-helicity scattering amplitudes vanish.
description: 8 pages, 2 figures
Positively negative? Dynamics and predictors of exposure to positive and negative political communication during an election campaign
Creators: name: Maier, Michaela
name: Gorski, Lea C.
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social Influence and Political Communication
subject: Social and Behavioral Sciences
subject: Communication

description: This is a preregistration of the research questions and hypotheses for a research paper. The paper analyzes the consumption of positive and negative messages during an election campaign and how the consumption is influenced by particularly relevant predispositions. The registration takes place after data collection, but prior to the analysis of the data.
Equilibrium morphology of tactoids in elastically anisotropic nematics
Creators: name: Schimming, Cody D.
name: Viñals, Jorge
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study two dimensional tactoids in nematic liquid crystals by using a $\mathbf{Q}$-tensor representation. A bulk free energy of the Maier-Saupe form with eigenvalue constraints on $\mathbf{Q}$, plus elastic terms up to cubic order in $\mathbf{Q}$ are used to understand the effects of anisotropic anchoring and Frank-Oseen elasticity on the morphology of nematic-isotropic domains. Further, a volume constraint is introduced to stabilize tactoids of any size at coexistence. We find that anisotropic anchoring results in differences in interface thickness depending on the relative orientation of the director at the interface, and that interfaces become biaxial for tangential alignment when anisotropy is introduced. For negative tactoids, surface defects induced by boundary topology become sharper with increasing elastic anisotropy. On the other hand, by parametrically studying their energy landscape, we find that surface defects do not represent the minimum energy configuration in positive tactoids. Instead, the interplay between Frank-Oseen elasticity in the bulk, and anisotropic anchoring yields semi-bipolar director configurations with non-circular interface morphology. Finally, we find that for growing tactoids the evolution of the director configuration is highly sensitive to the anisotropic term included in the free energy, and that minimum energy configurations may not be representative of kinetically obtained tactoids at long times.
description: 10 pages, 7 figures
Two-body and Three-body Contacts for Identical Bosons near Unitarity
Creators: name: Smith, D. Hudson
name: Braaten, Eric
name: Kang, Daekyoung
name: Platter, Lucas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In a recent experiment with ultracold trapped Rb-85 atoms, Makotyn et al. have studied a quantum-degenerate Bose gas in the unitary limit where its scattering length is infinitely large. We show that the observed momentum distributions are compatible with a universal relation that expresses the high-momentum tail in terms of the 2-body and the 3-body contacts. We determine the 2- and 3-body contact densities for the unitary Bose gas with number density n to be approximately 20n^{4/3} and 2n^{5/3}, respectively. We also show that the observed atom loss rate is compatible with that from 3-atom inelastic collisions, which gives a contribution proportional to the 3-body contact, but the loss rate is not compatible with that from 2-atom inelastic collisions, which gives a contribution proportional to the 2-body contact. We point out that the contacts could be measured independently by using the virial theorem near and at unitarity.
description: 5 pages, 1 figure
Eiffel Tower: A Deep-Sea Underwater Dataset for Long-Term Visual Localization
Creators: name: Boittiaux, Clémentin
name: Dune, Claire
name: Ferrera, Maxime
name: Arnaubec, Aurélien
name: Marxer, Ricard
name: Matabos, Marjolaine
name: Van Audenhaege, Loïc
name: Hugel, Vincent
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Visual localization plays an important role in the positioning and navigation of robotics systems within previously visited environments. When visits occur over long periods of time, changes in the environment related to seasons or day-night cycles present a major challenge. Under water, the sources of variability are due to other factors such as water conditions or growth of marine organisms. Yet it remains a major obstacle and a much less studied one, partly due to the lack of data. This paper presents a new deep-sea dataset to benchmark underwater long-term visual localization. The dataset is composed of images from four visits to the same hydrothermal vent edifice over the course of five years. Camera poses and a common geometry of the scene were estimated using navigation data and Structure-from-Motion. This serves as a reference when evaluating visual localization techniques. An analysis of the data provides insights about the major changes observed throughout the years. Furthermore, several well-established visual localization methods are evaluated on the dataset, showing there is still room for improvement in underwater long-term visual localization. The data is made publicly available at https://www.seanoe.org/data/00810/92226/.
description: The International Journal of Robotics Research, In press
Spinon confinement in the gapped antiferromagnetic XXZ spin-1/2 chain
Creators: name: Rutkevich, S. B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The infinite Heisenberg XXZ spin-(1/2) chain in the gapped antiferromagnetic regime has two degenerate vacua and kink topological excitations (which are also called spinons) interpolating between these vacua as elementary excitations. Application of an arbitrary weak staggered longitudinal magnetic field h induces a long-range attractive potential between two adjacent spinons leading to their confinement into 'meson' bound states. Exploiting the integrability of the XXZ model in the deconfined phase h = 0, we perform perturbative calculations of the energy spectra of the two-spinon bound states in the weak confinement regime at h \to +0, using the strength of the staggered magnetic field h as a small parameter. Both transverse and longitudinal dynamical structure factors of the local spin operators are calculated as well in the two-spinon approximation in the weak confinement regime to the leading order in h.
description: 48 pages, 18 figures; v2: misprints corrected, some technical details moved into Appendix D
D10.4: Communication activities: how to face second half of the project
Creators: name: Africa Pardavila
name: Iñigo Rodilla
Publisher: name: Zenodo
Year: 2020
Subjects: dissemination
communication
awareness rising
waste management

description: This report presents Task by Task (1) the work done within the Work Package 10 of the Valuewaste project (GA 818312) during the first 24 months of the project and (2) the actions planned for the second half of the project. The Work Package 10 Tasks cover:
 1. Task 10.1. Development of a Dissemination & Communication Plan (M1-M3).
 2. Task 10.2: Educational campaign in Murcia (M9-M24)
 3. Task 10.3. Citizens awareness campaign in Murcia and Kalundborg (M18-M37, preparation)
 4. Task 10.4. Promotion of project results to a targeted audience (M4-M48)
 5. Task 10.5. Communication (M4-M48).
 The most relevant points regarding the progress of the project during the first 24 months of the project are: (1) the WP10 has progressed according to expectations; (2) the focus of the actions during the first part of the project was on project communication; (3) all the scheduled milestones (MS9) and deliverables (D10.1, D10.2 and D10.3) were achieved on time.
 The points above (progress made, focus of the actions taken, and challenges encountered during the first half of the project) have been reviewed to design the actions for the second half of project implementation (M24-M48).
 The most relevant points regarding future actions for the project are: (1) work on communication will continue -Task 10.5-; (2) the Educational Campaign in Murcia (Spain)-Task 10.2- will carry out a final set of actions and finish on January 2021; (3) the Awareness Campaign in Murcia (Spain) and Kalundborg (Denmark)-Task 10.3-will start in January 2021; (4) the project will work to boost the engagement with policy makers, the participation in trade shows and the publication of articles to promote results -Task 10.4; and (5) the final event of the project will take place.
Spatial integration properties in MT neurons affect spatiotemporal motion discrimination
Creators: name: Arancibia, Lucia
name: Wimmer, Klaus
name: Hyafil, Alexandre
name: Yates, Jacob L.
name: Huk, Alexander C.
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Sensory processing and perception

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
No-Reference Point Cloud Quality Assessment via Weighted Patch Quality Prediction
Creators: name: Cheng, Jun
name: Su, Honglei
name: Korhonen, Jari
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: With the rapid development of 3D vision applications based on point clouds, point cloud quality assessment(PCQA) is becoming an important research topic. However, the prior PCQA methods ignore the effect of local quality variance across different areas of the point cloud. To take an advantage of the quality distribution imbalance, we propose a no-reference point cloud quality assessment (NR-PCQA) method with local area correlation analysis capability, denoted as COPP-Net. More specifically, we split a point cloud into patches, generate texture and structure features for each patch, and fuse them into patch features to predict patch quality. Then, we gather the features of all the patches of a point cloud for correlation analysis, to obtain the correlation weights. Finally, the predicted qualities and correlation weights for all the patches are used to derive the final quality score. Experimental results show that our method outperforms the state-of-the-art benchmark NR-PCQA methods. The source code for the proposed COPP-Net can be found at https://github.com/philox12358/COPP-Net.
description: 6 pages, 5 figures, Accepted by International Conference on Software Engineering and Knowledge Engineering(SEKE2023)
Strong electroweak phase transition in $t$-channel simplified dark matter models
Creators: name: Biondini, Simone
name: Schicho, Philipp
name: Tenkanen, Tuomas V. I.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Beyond the Standard Model physics is required to explain both dark matter and the baryon asymmetry of the universe, the latter possibly generated during a strong first-order electroweak phase transition. While many proposed models tackle these problems independently, it is interesting to inquire whether the same model can explain both. In this context, we link state-of-the-art perturbative assessments of the phase transition thermodynamics with the extraction of the dark matter energy density. These techniques are applied to a next-to-minimal dark matter model containing an inert Majorana fermion that is coupled to Standard Model leptons via a scalar mediator, where the mediator interacts directly with the Higgs boson. For dark matter masses 180 GeV $ < M_χ<$ 300 GeV, we discern regions of the model parameter space that reproduce the observed dark matter energy density and allow for a first-order phase transition, while evading the most stringent collider constraints.
description: 54 pages, 12 figures, 1 table; v2: Journal version, extended section 3.2
Critical behaviour near critical end points and tricritical points in disordered spin-1 ferromagnets
Creators: name: Mukherjee, Soheli
name: Sumedha
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Critical end points and tricritical points are multicritical points that separate lines of continuous transitions from lines of first order transitions in the phase diagram of many systems. In models like the spin-1 disordered Blume-Capel model and the repulsive Blume-Emery-Griffiths model, the tricritical point splits into a critical end point and a bicritical end point with an increase in disorder and repulsive coupling strength respectively. In order to make a distinction between these two multicritical points, we investigate and contrast the behaviour of the first order phase boundary and the co-existence diameter around them.
description: 23 pages, 28 figures
Loop currents in $A$V$_3$Sb$_5$ kagome metals: multipolar and toroidal magnetic orders
Creators: name: Christensen, Morten H.
name: Birol, Turan
name: Andersen, Brian M.
name: Fernandes, Rafael M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Experiments in the recently discovered vanadium-based kagome metals have suggested that their charge-ordered state displays not only bond distortions, characteristic of a ``real" charge density-wave (rCDW), but also time-reversal symmetry-breaking, typical of loop currents described by an ``imaginary" charge density-wave (iCDW). Here, we combine density-functional theory, group-theory, and phenomenological modeling to investigate the complex charge-ordered states that arise from interactions between the low-energy van Hove singularities present in the electronic structure of $A$V$_3$Sb$_5$. We find two broad classes of mixed iCDW-rCDW configurations: triple-$\mathbf{Q}$ iCDW, triple-$\mathbf{Q}$ rCDW order, dubbed $3\mathbf{Q}$-$3\mathbf{Q}$, and double-$\mathbf{Q}$ iCDW, single-$\mathbf{Q}$ rCDW order, dubbed $2\mathbf{Q}$-$1\mathbf{Q}$. Moreover, we identify seven different types of iCDW order, stemming from the different vanadium-orbital and kagome-sublattice structures of the two pairs of van Hove singularities present above and below the Fermi level. While the $2\mathbf{Q}$-$1\mathbf{Q}$ states trigger an orthorhombic distortion that breaks the threefold rotational symmetry of the kagome lattice, the $3\mathbf{Q}$-$3\mathbf{Q}$ states induce various types of subsidiary uniform magnetic orders, from conventional ferromagnetism to magnetic octupolar, magnetic toroidal, and even magnetic monopolar order. We show that these exotic orders display unique magneto-striction, magneto-electric, and magneto-electric-striction properties that can be probed experimentally to identify which iCDW state is realized in these compounds. We briefly discuss the impact of an out-of-plane modulation of the charge order and the interplay between these complex charge-ordered states and superconductivity.
description: 20 pages, 8 figures
Double Ramp Loss Based Reject Option Classifier
Creators: name: Manwani, Naresh
name: Desai, Kalpit
name: Sasidharan, Sanand
name: Sundararajan, Ramasubramanian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We consider the problem of learning reject option classifiers. The goodness of a reject option classifier is quantified using $0-d-1$ loss function wherein a loss $d \in (0,.5)$ is assigned for rejection. In this paper, we propose {\em double ramp loss} function which gives a continuous upper bound for $(0-d-1)$ loss. Our approach is based on minimizing regularized risk under the double ramp loss using {\em difference of convex (DC) programming}. We show the effectiveness of our approach through experiments on synthetic and benchmark datasets. Our approach performs better than the state of the art reject option classification approaches.
Code reversal between stimulus processing and fading memories in primate V1
Creators: name: Wolff, Michael J.
name: Yiling, Yang
name: Krause, Noa N.
name: Singer, Wolf
name: Rademaker, Rosanne L.
Publisher: name: G-Node
Year: 2024
Subjects: Computational Neuroscience
Sensory processing and perception

description: Bernstein Conference 2024 abstract. https://bernstein-conference.de
Zero-average bias bidirectional single-electron current generation in a hybrid turnstile
Creators: name: Marín-Suárez, Marco
name: Pashkin, Yuri A.
name: Peltonen, Joonas T.
name: Pekola, Jukka P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Hybrid turnstiles have proven to generate accurate single-electron currents. The usual operation consists of applying a periodic modulation to a capacitively coupled gate electrode and requires a non-zero DC source-drain bias voltage. Under this operation, a current of the same magnitude and opposite direction can be generated by flipping the polarity of the bias. Here, we demonstrate that accurate single-electron currents can be generated under zero average bias voltage. We achieve this by applying an extra periodic modulation with twice the frequency of the gate signal and zero DC level to the source electrode. This creates a time interval, which is otherwise zero, between the crossings of tunnelling thresholds that enable single-electron tunnelling. Furthermore, we show that within this operation the current direction can be reversed by only shifting the phase of the source signal.
description: 5 pages
Linycus simulator HEINRICH 1974
Creators: name: Riedel, Matthias
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Linycus
Linycus simulator

description: Linycus simulator HEINRICH, 1974 M a t e r i a l: China, Yunnan, Tengshong 35 km SE Gongshan, N 24.828  E 98.767 , 2200 m, 1♀ 28.V.2009, leg. Blank, Liston & Taeger (SDEI); Laos, Hua Phan Prov., Ban Saleui, Phon-Pan-Mt. 2013´30´´N 10359´26´´E, 1350-1900 m, 1♀ 22.IV.2012, 13 4.VII.2013, 1♀ 21-25.IV.2014, leg. C. Holzschuh & natives (Linz); Thailand, Chiang Mai, Doi Southep-Pui NP, N 1850´E 9845´, 13 14.III.1992, leg. E. Hüttinger (Linz). D i s t r i b u t i o n: Known from Myanmar, new for China, Laos and Thailand.
description: Published as part of Riedel, Matthias, 2017, Contribution to the Ichneumoninae (Hymenoptera, Ichneumonidae) of Southeastern Asia: 4. Platylabini, Eurylabini, and Oedicephalini, pp. 1275-1307 in Linzer biologische Beiträge 49 (2) on page 1280, DOI: 10.5281/zenodo.5412243
Learning to Act through Evolution of Neural Diversity in Random Neural Networks
Creators: name: Pedersen, Joachim Winther
name: Risi, Sebastian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Biological nervous systems consist of networks of diverse, sophisticated information processors in the form of neurons of different classes. In most artificial neural networks (ANNs), neural computation is abstracted to an activation function that is usually shared between all neurons within a layer or even the whole network; training of ANNs focuses on synaptic optimization. In this paper, we propose the optimization of neuro-centric parameters to attain a set of diverse neurons that can perform complex computations. Demonstrating the promise of the approach, we show that evolving neural parameters alone allows agents to solve various reinforcement learning tasks without optimizing any synaptic weights. While not aiming to be an accurate biological model, parameterizing neurons to a larger degree than the current common practice, allows us to ask questions about the computational abilities afforded by neural diversity in random neural networks. The presented results open up interesting future research directions, such as combining evolved neural diversity with activity-dependent plasticity.
description: Linebreaks in abstract fixed
Pachyjoppa tibialis CAMERON 1901
Creators: name: Riedel, Matthias
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Pachyjoppa
Pachyjoppa tibialis

description: Pachyjoppa tibialis CAMERON, 1901 M a t e r i a l: China, Yunnan, Gongshan 40 km NW Dulong, N 27.984  E 98.324 , 1700 m, 1♀ 8.VI.2009, leg. Blank, Liston & Taeger (SDEI); China, Yunnan, Pianma environment, N 25.973  E 98.708 , 2500 m, 13 3.VI.2009, leg. Blank, Liston & Taeger (SDEI); Laos, Hua Phan Prov., Phon-Pan, Umg. Ort Ban Saleui, 2013´30´´N 10359´26´´E, 1350-1900 m, multiple ♀♀ and 33 2011-2013, leg. C. Holzschuh & natives (Linz). D i s t r i b u t i o n: Known from India and Myanmar, new for China and Laos.
description: Published as part of Riedel, Matthias, 2017, Contribution to the Ichneumoninae (Hymenoptera, Ichneumonidae) of Southeastern Asia: 4. Platylabini, Eurylabini, and Oedicephalini, pp. 1275-1307 in Linzer biologische Beiträge 49 (2) on page 1280, DOI: 10.5281/zenodo.5412243
Robust Quantum Memory in a Trapped-Ion Quantum Network Node
Creators: name: Drmota, P.
name: Main, D.
name: Nadlinger, D. P.
name: Nichol, B. C.
name: Weber, M. A.
name: Ainley, E. M.
name: Agrawal, A.
name: Srinivas, R.
name: Araneda, G.
name: Ballance, C. J.
name: Lucas, D. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We integrate a long-lived memory qubit into a mixed-species trapped-ion quantum network node. Ion-photon entanglement first generated with a network qubit in Sr-88 is transferred to Ca-43 with 0.977(7) fidelity, and mapped to a robust memory qubit. We then entangle the network qubit with a second photon, without affecting the memory qubit. We perform quantum state tomography to show that the fidelity of ion-photon entanglement decays ~70 times slower on the memory qubit. Dynamical decoupling further extends the storage duration; we measure an ion-photon entanglement fidelity of 0.81(4) after 10s.
Eficiency of REST and gRPC realizing communication tasks in microservice-based ecosystems
Creators: name: Bolanowski, Marek
name: Żak, Kamil
name: Paszkiewicz, Andrzej
name: Ganzha, Maria
name: Paprzycki, Marcin
name: Sowiński, Piotr
name: Lacalle, Ignacio
name: Palau, Carlos E.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Performance (cs.PF)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences
subject: C.2.4; C.4; D.4.4

description: The aim of this contribution is to analyse practical aspects of the use of REST APIs and gRPC to realize communication tasks in applications in microservice-based ecosystems. On the basis of performed experiments, classes of communication tasks, for which given technology performs data transfer more efficiently, have been established. This, in turn, allows formulation of criteria for the selection of appropriate communication methods for communication tasks to be performed in an application using microservices-based architecture.
description: Accepted for the conference -- The 21st International Conference on Intelligent Software Methodologies, Tools, and Techniques (SOMET 2022)
Groupe de Brauer non ramifié des espaces homogènes à stabilisateur fini (Unramified Brauer group of homogeneous spaces with finite stabilizer)
Creators: name: Arteche, Giancarlo Lucchini
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14F22, 14M17, 12G05, 14G15, 14G27,

description: We develop different formulas of algebraic and/or arithmetic nature allowing an explicit calculation, both over a finite field and over a field of characteristic 0, of the algebraic part of the unramified Brauer group of a homogeneous space G\G' under a semisiple simply connected linear group G' with finite stabilizer G. We also give examples of the calculations that can be done with these formulas.
description: Final version
Influence of the coordination defects on the dynamics and the potential energy landscape of two-dimensional silica
Creators: name: Roy, Projesh Kumar
name: Heuer, Andreas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The main cause of the fragile-to-strong crossover of 3D silica was previously attributed to the presence of a low energy cutoff in the potential energy landscape. The important question emerges about the microscopic origin of this crossover and the generalizibility to other glass-formers. In this work, the fragile-to-strong crossover of a model 2D glassy system is analyzed via molecular dynamics simulation, which represents 2D-silica. By separating the sampled defect and defect-free inherent structures, we are able to identify their respective density of state distributions with respect to energy. A low energy cutoff is found in both distributions. It is shown that the fragile-to-strong crossover can be quantitatively related to the parameters of the energy landscape, involving in particular the low-energy cutoff of the energy distribution. It is also shown that the low-energy cutoff of the defect-states is determined by the formation energy of a specific defect configuration, involving two silicon and no oxygen defect. The low-temperature behavior of 2D silica is quantitatively compared with that of 3D silica, showing surprisingly similar behavior.
description: 11 pages, 7 figures