cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Semi-Supervised Learning using Siamese Networks
Creators: name: Sahito, Attaullah
name: Frank, Eibe
name: Pfahringer, Bernhard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Neural networks have been successfully used as classification models yielding state-of-the-art results when trained on a large number of labeled samples. These models, however, are more difficult to train successfully for semi-supervised problems where small amounts of labeled instances are available along with a large number of unlabeled instances. This work explores a new training method for semi-supervised learning that is based on similarity function learning using a Siamese network to obtain a suitable embedding. The learned representations are discriminative in Euclidean space, and hence can be used for labeling unlabeled instances using a nearest-neighbor classifier. Confident predictions of unlabeled instances are used as true labels for retraining the Siamese network on the expanded training set. This process is applied iteratively. We perform an empirical study of this iterative self-training algorithm. For improving unlabeled predictions, local learning with global consistency [22] is also evaluated.
description: added link of GitHub repository
Nonlinear metrology with a quantum interface
Creators: name: Napolitano, M.
name: Mitchell, M. W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We describe nonlinear quantum atom-light interfaces and nonlinear quantum metrology in the collective continuous variable formalism. We develop a nonlinear effective Hamiltonian in terms of spin and polarization collective variables and show that model Hamiltonians of interest for nonlinear quantum metrology can be produced in $^{87}$Rb ensembles. With these Hamiltonians, metrologically relevant atomic properties, e.g. the collective spin, can be measured better than the "Heisenberg limit" $\propto 1/N$. In contrast to other proposed nonlinear metrology systems, the atom-light interface allows both linear and non-linear estimation of the same atomic quantities.
description: 8 pages, 1 figures
Lensing Effects in Retarded Gravity
Creators: name: Yahalom, Asher
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Galaxies are gigantic physical systems having a typical size of many tens of thousands of light years. Thus any change at the center of the galaxy will affect the rim only tens of millennia later. Those retardation effects seems to be ignored in present day modelling used to calculate rotational velocities of matter in the outskirts of the galaxy and the surrounding gas. The significant discrepancies between the velocities predicted by Newtonian theory and observed velocities are usually handled by either assuming an unobservable type of matter denoted "dark matter" or by modifying the laws of gravity (MOND as an example). Here we will show that considering general relativistic effects without neglecting retardation one can explain the apparent excess matter leading to gravitational lensing in both galaxies and galaxy clusters.
description: 25 pages, 4 figures. arXiv admin note: text overlap with arXiv:2012.04490
Low-power threshold gas discharge by enhanced local electric field in electromagnetically-induced-transparencylike metamolecules
Creators: name: Tamayama, Yasuhiro
name: Yamada, Ryosuke
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: To realize efficient nonlinear metamaterials, we investigate a method for enhancing the local electric field in a metamolecule composed of two radiatively coupled cut-wire resonators where resonance of the cut-wire resonators and low-group-velocity propagation of an incident electromagnetic wave simultaneously occur. Numerical analysis shows that the local electric field in the metamolecule can be enhanced by decreasing the electrode size and the gap of the capacitor structure of the cut-wire resonators while keeping the equivalent electrical circuit parameters of the metamolecule constant. We measure and compare the threshold incident power for a gas discharge in the metamolecule fabricated in our previous study and that in the metamolecule with shrunken capacitor structures. The experiment reveals that shrinking the capacitor structure while keeping the resonance frequency of the metamolecule decreases the threshold incident power for a gas discharge and may increase the gas pressure where the threshold incident power is minimum. Further development of this work will enable us to realize efficient nonlinear metamaterials that have atmospheric-pressure gas as a nonlinear element.
description: 11 pages, 4 figures. This is the version of the article before peer review or editing, as submitted by an author to Journal of Physics D: Applied Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1361-6463/ac0d50
Transfer of Pretrained Model Weights Substantially Improves Semi-Supervised Image Classification
Creators: name: Sahito, Attaullah
name: Frank, Eibe
name: Pfahringer, Bernhard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Deep neural networks produce state-of-the-art results when trained on a large number of labeled examples but tend to overfit when small amounts of labeled examples are used for training. Creating a large number of labeled examples requires considerable resources, time, and effort. If labeling new data is not feasible, so-called semi-supervised learning can achieve better generalisation than purely supervised learning by employing unlabeled instances as well as labeled ones. The work presented in this paper is motivated by the observation that transfer learning provides the opportunity to potentially further improve performance by exploiting models pretrained on a similar domain. More specifically, we explore the use of transfer learning when performing semi-supervised learning using self-learning. The main contribution is an empirical evaluation of transfer learning using different combinations of similarity metric learning methods and label propagation algorithms in semi-supervised learning. We find that transfer learning always substantially improves the model's accuracy when few labeled examples are available, regardless of the type of loss used for training the neural network. This finding is obtained by performing extensive experiments on the SVHN, CIFAR10, and Plant Village image classification datasets and applying pretrained weights from Imagenet for transfer learning.
description: added link to code and data repo
Collaborative model of interaction and Unmanned Vehicle Systems' interface
Creators: name: Saget, Sylvie
name: Legras, Francois
name: Coppin, Gilles
Publisher: name: arXiv
Year: 2008
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Human-Computer Interaction (cs.HC)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: The interface for the next generation of Unmanned Vehicle Systems should be an interface with multi-modal displays and input controls. Then, the role of the interface will not be restricted to be a support of the interactions between the ground operator and vehicles. Interface must take part in the interaction management too. In this paper, we show that recent works in pragmatics and philosophy provide a suitable theoretical framework for the next generation of UV System's interface. We concentrate on two main aspects of the collaborative model of interaction based on acceptance: multi-strategy approach for communicative act generation and interpretation and communicative alignment.
KMD Elev
Creators: Glostrup Kommune
Herlev Kommune
Høje-Taastrup Kommune
Hillerød Kommune
Køge Kommune
Kalundborg Kommune
Stevns Kommune
Kerteminde Kommune
Nordfyns Kommune
Ærø Kommune
Fanø Kommune
Favrskov Kommune
Odder Kommune
Samsø Kommune
Skanderborg Kommune
Ringkøbing-Skjern Kommune
Publisher: name: Rigsarkivet
Year: 2022

description: KMD Elev løser de administrative opgaver, der er omkring elevernes stam- og undervisningsoplysninger, samt de administrative opgaver der er med undervisningspligten, adressekontrol, plejebørn/udenbys børn, skoleregister, aktuelt elevtal, skoleindskrivning, skolebestyrelsesvalg, transport/buskort, søskendeoplysninger, forældreoplysninger, elevernes fravær, handleplan, skolefritidsordning, klasseoprykning, prøveafvikling samt ungdomsskoletilbud.
Influence of cutoff dipole interaction radius and dilution on phase transition in kagome artificial spin ice
Creators: name: Andriushchenko, Petr
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The investigations carried out in this paper show the influence of cutoff dipole interaction radius and dilution on the basic thermodynamic characteristics of the kagome artificial spin ice with free boundary conditions. The phase transition disappearance at the dipole interaction radius limitation was shown in our previous study by Shevchenko {\it et al.} [JETP {\bf 124}(6), 982-993 (2017)]. This work continues this study and answers the question of the coordination spheres numbers that must be taken into account, in order not to lose the basic collective phenomena. The answer is at least three coordination spheres with 14 nearest neighbors must be taken into account for kagome artificial spin ice. Restriction to a smaller cutoff radius leads to significant changes in the thermodynamic behavior of the main characteristics of the system. An increase of the interaction radius shifts the phase transition temperature to the low-temperature area. The effects of dilution on kagome artificial spin ice were also investigated. It is shown that the phase transition occurs up to $p_c\approx0.35$ dilution concentrations, that well coincides with the Sykes and Essam theory. Further dilution leads to the phase transition disappearance.
Magnetic excitations in dipolar pyrochlore antiferromagnet Gd$_2$Sn$_2$O$_7$
Creators: name: Sosin, S. S.
name: Prozorova, L. A.
name: Bonville, P.
name: Zhitomirsky, M. E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The spin dynamics in the geometrically frustrated pyrochlore antiferromagnet $\rm Gd_2Sn_2O_7$ is studied by means of the electron spin resonance. In the ordered phase ($T_N = 1$ K), we have detected three gapped resonance modes. Their values agree well with the developed spin-wave theory which takes into account the Heisenberg nearest-neighbor exchange, the single-ion anisotropy and the long-range dipolar interactions. The theory also predicts a fourth lowest-frequency gap, which lies beyond the experimental range of frequencies, but determines the exponential decrease of the specific heat at low temperature.
description: 8 pages, 5 figures
Accuracy and Stability of Computing High-Order Derivatives of Analytic Functions by Cauchy Integrals
Creators: name: Bornemann, Folkmar
Publisher: name: arXiv
Year: 2009
Subjects: subject: Numerical Analysis (math.NA)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 65E05, 65D25, 65G56, 30D15

description: High-order derivatives of analytic functions are expressible as Cauchy integrals over circular contours, which can very effectively be approximated, e.g., by trapezoidal sums. Whereas analytically each radius r up to the radius of convergence is equal, numerical stability strongly depends on r. We give a comprehensive study of this effect; in particular we show that there is a unique radius that minimizes the loss of accuracy caused by round-off errors. For large classes of functions, though not for all, this radius actually gives about full accuracy; a remarkable fact that we explain by the theory of Hardy spaces, by the Wiman-Valiron and Levin-Pfluger theory of entire functions, and by the saddle-point method of asymptotic analysis. Many examples and non-trivial applications are discussed in detail.
description: Version 4 has some references and a discussion of other quadrature rules added; 57 pages, 7 figures, 6 tables; to appear in Found. Comput. Math
Is non-particle dark matter equation of state parameter evolving with time?
Creators: name: Ghose, Souvik
name: Bhadra, Arunabha
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Recently, the so-called Hubble Tension, i.e. the mismatch between the local and the cosmological measurements of the Hubble parameter, has been resolved when non-particle dark matter is considered which has a negative equation of state parameter ($ω\approx -0.01$). We investigate if such a candidate can successfully describe the galactic flat rotation curves. It is found that the flat rotation curve feature puts a stringent constraint on the dark matter equation of state parameter $ω$ and $ω\approx -0.01$ is not consistent with flat rotational curves, observed around the galaxies. However, a dynamic $ω$ of non-particle dark matter may overcome the Hubble tension without affecting the flat rotation curve feature.
description: 6 pages, 1 figure, Accepted for publication in EPJC
Automorphism groups of minimal algebras
Creators: name: Renner, Lex Ellery
Publisher: name: University of British Columbia
Year: 2010

description: Rational homotopy theory is the study of uniquely divisible homotopy invariants. For each nilpotent space X the association X ——» minimal algebra for X is a complete determination of these invariants. If X is a space and Mx its minimal algebra, the algebraic group Aut Mx and the representation Aut Mx ——» Gl(Mx) have considerable influence on the structure of Mx . This thesis contains a systematic study of this interaction. Chapter I contains preliminary results from algebraic group theory and general topology. In Chapter II I define and study inverse limits of algebraic groups. I prove that many of the known structural properties of algebraic groups remain valid in this more general setting. Emphasis is placed on the conjugacy theorems that are particularly useful for studying minimal algebras. Chapter III is the main part of the thesis where I develop a structure theory for minimal algebras which relates toroidal symmetry to retracts. Precisely, if M is a minimal algebra, then there exists a 1-parameter subgroup λ : Q* ——> Aut Mx such that λ extends to λ : Q——» End Mx λ: (0) = e = e²: Mx——» Mx Further if e so chosen is minimal then it is uniquely determined up to conjugation by Aut Mx . In the interesting case where e = 0m I give a pro-algebraic group theoretic proof of uniqueness of coproduct and product decompositions in the appropriate homotopy category.
Upper bounds for the moments of zeta prime rho
Creators: name: Milinovich, Micah B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11M06, 11M26

description: Assuming the Riemann Hypothesis, we obtain an upper bound for the 2k-th moment of the derivative of the Riemann zeta-function averaged over the non-trivial zeros of $ζ(s)$ for every positive integer k. Our bounds are nearly as sharp as the conjectured asymptotic formulae for these moments. The proof is based upon a recent method of K. Soundararajan that provides analogous bounds for continuous moments of the Riemann zeta-function as well as for moments L-functions at the central point, averaged over families.
description: submitted for publication
Complex chemical dynamics through engineering-like methods
Creators: name: Moro, Lorenzo <1985>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: CHIM/02 Chimica fisica

description: Most of the problems in modern structural design can be described with a set of equation; solutions of these mathematical models can lead the engineer and designer to get info during the design stage. The same holds true for physical-chemistry; this branch of chemistry uses mathematics and physics in order to explain real chemical phenomena. In this work two extremely different chemical processes will be studied; the dynamic of an artificial molecular motor and the generation and propagation of the nervous signals between excitable cells and tissues like neurons and axons. These two processes, in spite of their chemical and physical differences, can be both described successfully by partial differential equations, that are, respectively the Fokker-Planck equation and the Hodgkin and Huxley model. With the aid of an advanced engineering software these two processes have been modeled and simulated in order to extract a lot of physical informations about them and to predict a lot of properties that can be, in future, extremely useful during the design stage of both molecular motors and devices which rely their actions on the nervous communications between active fibres.
Hydrodynamic Impulse in a Compressible Fluid
Creators: name: Shivamoggi, Bhimsen K.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: A suitable expression for hydrodynamic impulse in a compressible fluid is deduced. The development of appropriate impulse formulation for compressible Euler equations confirms the propriety of the hydrodynamic impulse expression for a compressible fluid given here. Implications of the application of this formulation to a compressible vortex ring are pointed out. A variational characterization for an axisymmetric vortex system moving steadily in an ideal, compressible fluid is discussed.
Typical orbits of quadratic polynomials with a neutral fixed point: non-Brjuno type
Creators: name: Cheraghi, Davoud
Publisher: name: arXiv
Year: 2010
Subjects: subject: Dynamical Systems (math.DS)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 37F50, 46T25, 37F25

description: We investigate the quantitative and analytic aspects of the near-parabolic renormalization scheme introduced by Inou and Shishikura in 2006. These provide techniques to study the dynamics of some holomorphic maps of the form $f(z) = e^{2πi α} z + \mathcal{O}(z^2)$, including the quadratic polynomials $e^{2πi α} z+z^2$, for some irrational values of $α$. The main results of the paper concern fine-scale features of the measure-theoretic attractors of these maps, and their dependence on the data. As a bi-product, we establish an optimal upper bound on the size of the maximal linearization domain in terms of the Siegel-Brjuno-Yoccoz series of $α$.
description: 80 pages; Corrections have been made according to referee reports. A new statement is added to the paper
Impact of javelin point geometry on aerodynamic performance and flight distance
Creators: name: Blocken, Bert
name: van Druenen, Thijs
name: Malizia, Fabio
name: Gillmeier, Stefanie
name: Ricci, Alessio
Publisher: name: Loughborough University
Year: 2024

description: Engineering of Sport 15 - Proceedings from the 15th International Conference on the Engineering of Sport (ISEA 2024)
Different types of javelin exist. Two common types are the pointed-nosed and blunt-nosed javelin. These javelins can be identical except for the shape of the nose. Different statements have been made concerning the performance of these javelins. Some have indicated that the pointed-nosed javelin would always be more aerodynamic than the blunt-nosed javelin and would therefore allow superior performance in terms of flight distance. However, a pioneer in javelin design has repeatedly declared that the blunt-nosed javelin would be superior over the pointed-nosed javelin in terms of flight distance, but only under tailwind conditions.  As a result, this javelin was termed the “tailwind javelin”. Although recently some new statements have emerged that the blunt-nosed javelin would be superior under all conditions (tailwind, no wind and headwind), to the best of our knowledge, no scientific evidence of any of these statements has been reported in the scientific literature. Therefore, the present authors have applied numerical simulation with computational fluid dynamics (CFD), validated by wind-tunnel tests, to shed more light on the aerodynamic characteristics and the flight performance of these two javelin types.
Relaxation time of a CFT plasma at finite coupling
Creators: name: Buchel, Alex
name: Paulos, Miguel
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Following recent formulation of second order relativistic viscous hydrodynamics for conformal fluids, we compute finite coupling corrections to the relaxation time of N=4 supersymmetric Yang-Mills plasma. The result is expected to be universal for any strongly coupled conformal gauge theory plasma in four dimensions.
description: 17 pages
Chiral Bargmann-Wigner Equations for Spin-1 Massive Fields
Creators: name: Watson, T. B.
name: Musielak, Z. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Bargman-Wigner equations are generalized to include chiral symmetry based on the irreps of the Poincaré group, and the chirial Bargmann-Wigner equations are derived for spin-1 massive fields. By specifying the chiral basis, the chiral Bargmann-Wigner equations are reduced to the Proca-like equation, which is coupled by chirality to an auxiliary equation for spin-0 massive field. The coupling is a new phenomenon whose physical implications for the Higgs field and dark matter are discussed.
title: Contact area analysis of an asphalt-concrete boundary layer with X-ray computed tomography imaging
Creators: name: Middendorf, Moritz
name: Umbach, Cristin
name: Liu, Jia
name: Koenders, Eduardus A.B.
Publisher: name: Elsevier
Year: 2024

description: This study focusses on the bond between asphalt and concrete. The bond is a decisive factor for the transfer of traffic loads. A lack of bond between the layers can quickly reduce the load-bearing behavior and thus lead to pavement failure. In the literature, the bond between asphalt pavements and concrete substrates is usually analyzed using mechanical test methods. With mechanical test methods, the effects of interlocking, glue adhesion and friction, which have an effect at the layer boundary, are not considered individually. Based on previous findings, the aim of this study is to carry out a precise analysis of the bonding at the layer interface between concrete and asphalt using bitumen emulsion by means of measurements with a high-resolution X-ray computer tomography (CT). To determine the effect of the surface texture of the substrate, the investigations were carried out on milled and smooth surface textures. In addition to the variation of the substrate profiles, the influence of the application quantity of the bitumen emulsions C40 B5-S and C60 BP4-S was analyzed by spraying quantities of 90 g/m² and 180 g/m² bitumen after breaking. A newly developed method was used to determine the effective degree of gluing at the layer boundary, which allowed the bonding efficiency to be determined. The results of the calculated degree of gluing for the individual variants show that the highest degree of gluing of 61.94% is achieved with the smooth texture variant and high application quantity of bitumen emulsion. The lowest degree of gluing of 17.01% was achieved with the milled texture variant without the application of bitumen emulsion. Overall, the results showed that the degree of gluing was increased for both surface textures by applying the bitumen emulsion. Compared to the smooth texture, the milled textures exhibit a lower degree of gluing for both bitumen quantities, which could be explained by the distribution of the bitumen emulsions on the substrate profiles.
Acoustic Geometric-Phase Meta-Array
Creators: name: Liu, Bingyi
name: Su, Zhaoxian
name: Zeng, Yong
name: Wang, Yongtian
name: Huang, Lingling
name: Zhang, Shuang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Metasurfaces based on geometric phase acquired from the conversion of the optical spin states provide a robust control over the wavefront of light, and have been widely employed for construction of various types of functional metasurface devices. However, this powerful approach cannot be readily transferred to the manipulation of acoustic waves because acoustic waves do not possess the spin degree of freedom. Here, we propose the concept of acoustic geometric-phase meta-array by leveraging the conversion of orbital angular momentum of acoustic waves, where well-defined geometric-phases can be attained through versatile topological charge conversion processes. This work extends the concept of geometric-phase metasurface from optics to acoustics, and provides a new route for acoustic wave control.
description: 14 pages, 4 figures
Valg
Creators: Københavns Kommune
Frederiksberg Kommune
Ballerup Kommune
Brøndby Kommune
Dragør Kommune
Gentofte Kommune
Gladsaxe Kommune
Glostrup Kommune
Herlev Kommune
Albertslund Kommune
Hvidovre Kommune
Høje-Taastrup Kommune
Egedal Kommune
Lyngby-Taarbæk Kommune
Rødovre Kommune
Ishøj Kommune
Tårnby Kommune
Vallensbæk Kommune
Allerød Kommune
Rudersdal Kommune
Furesø Kommune
Fredensborg-Humlebæk Kommune
Frederikssund Kommune
Fredensborg Kommune
Halsnæs Kommune
Gribskov Kommune
Helsingør Kommune
Hillerød Kommune
Hørsholm Kommune
Greve Kommune
Køge Kommune
Lejre Kommune
Roskilde Kommune
Solrød Kommune
Holbæk Kommune
Odsherred Kommune
Kalundborg Kommune
Ringsted Kommune
Slagelse Kommune
Sorø Kommune
Stevns Kommune
Faxe Kommune
Møn Kommune
Næstved Kommune
Vordingborg Kommune
Lolland Kommune
Guldborgsund Kommune
Bornholm Kommune
Christiansø Kommune
Assens Kommune
Nordfyn Kommune
Faaborg-Midtfyn Kommune
Kerteminde Kommune
Middelfart Kommune
Nyborg Kommune
Odense Kommune
Svendborg Kommune
Ærø Kommune
Langeland Kommune
Sønderborg Kommune
Aabenraa Kommune
Haderslev Kommune
Billund Kommune
Tønder Kommune
Esbjerg Kommune
Fanø Kommune
Varde Kommune
Vejen Kommune
Fredericia Kommune
Hedensted Kommune
Horsens Kommune
Kolding Kommune
Vejle Kommune
Herning Kommune
Holstebro Kommune
Ikast-Brande Kommune
Lemvig Kommune
Ringkøbing-Skjern Kommune
Struer Kommune
Syddjurs Kommune
Norddjurs Kommune
Mariagerfjord Kommune
Odder Kommune
Randers Kommune
Samsø Kommune
Silkeborg Kommune
Skanderborg Kommune
Århus Kommune
Skive Kommune
Thisted Kommune
Viborg Kommune
Rebild Kommune
Jammerbugt Kommune
Frederikshavn Kommune
Brønderslev Kommune
Læsø Kommune
Vesthimmerland Kommune
Aalborg Kommune
Hjørring Kommune
Publisher: name: Rigsarkivet
Year: 2022

description: Opsamling, behandling og bevaring af afstemningsdata for valg.
Conductance fluctuations and field asymmetry of rectification in graphene
Creators: name: Ojeda-Aristizabal, C.
name: Monteverde, M.
name: Weil, R.
name: Ferrier, M.
name: Gueron, S.
name: Bouchiat, H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate conductance fluctuations as a function of carrier density $n$ and magnetic field in diffusive mesoscopic samples made from monolayer and bilayer graphene. We show that the fluctuations' correlation energy and field, which are functions of the diffusion coefficient, have fundamentally different variations with $n$, illustrating the contrast between massive and massless carriers. The field dependent fluctuations are nearly independent of $n$, but the $n$-dependent fluctuations are not universal and are largest at the charge neutrality point. We also measure the second order conductance fluctuations (mesoscopic rectification). Its field asymmetry, due to electron-electron interaction, decays with conductance, as predicted for diffusive systems.
description: Panel c in figure 4 represented differently
5G-ROUTES: D1.1 Use-Cases scenarios specs target KPIs for 5G for CAM
Creators: name: PHAM-MINH, Duc
Publisher: name: Zenodo
Year: 2022

description: This report provides a representative set of detailed use case scenarios for Connected and Automated Mobility (CAM) with appropriate requirements to be tested and validated both in lab and in large-scale field trials across borders. The document summarizes the work done by the partners to define use cases, scenarios and KPIs applicable to 5G Connected and Automated Mobility trials. 5G-ROUTES stakeholders come from different companies and have a different background and interest in the project. We have first analysed their characteristics and identified 4 categories of stakeholders: The telecom category contains large telecom manufacturers and operators; within the transport category, railway operators are supporting future railway mobile communications system (FRMCS); Several SMEs, Research institutes and universities bring their expertise on specific domains. 5G will extend the range of services offered by mobile telecom systems. Three directions have been identified by ITU-R: massive Machine Type Communications, Ultra Reliable Low Latency Communications and enhanced Mobile BroadBand communication. We have detailed the multilayer architecture of a 5G radio access network and some key features of the core network as Mobile Edge Computing, Network Slicing and roaming. Finally, we described typical satellite communication systems and detailed the performance of different 4G, 5G, satellite and 5G-ROUTES experimental network. Several use cases of CAM using 5G networks have been identified in the 5G-ROUTES project. We have identified key aspects of these use cases and filed them in 3 main categories: The mMTC category groups messaging applications which involve a large number of devices; the URLLC category groups real time applications with strong delay constraints; the eMBB category groups use cases which require high data rates. These use cases and their requirements are further described in more details, as well as the corresponding scenarios. The work carried out showed that the performances of 5G networks are sufficient but necessary to support our use cases; it shows also that the selected use cases exploit all the possibilities of 5G networks. This document is the initial version of the CAM use cases and will be updated by month M10.
High frequency pressure fluctuations on a two dimensional square cylinder in smooth and turbulent flows
Creators: name: Vasanji, Zainulabdeen
Publisher: name: University of British Columbia
Year: 2010

description: There is a need to develop statistical design procedures for glass and cladding panels in buildings exposed to strong winds. Account must be taken of the high frequency, high amplitude pressure fluctuations observed occassionally on full scale buildings and building models in simulated atmospheric flows, and the non-Gaussian probability distribution of these pressure amplitudes. Most probability distributions of the pressure fluctuations can be modelled over the low-pressure range where the danger of damage is the highest, by a decaying exponential curve of the form F(x) = 1 – e[sup –ax[sup b]] Using this type of approximation, which finally rests on the determination of the two empirical statistical parameters "a" and "b", plus the usually measured mean and root-mean square pressure coefficients, the numerical risk of occurrence of any specified low pressure can be predicted for a particular time interval over which the high winds persist. The simple analysis developed here also requires as an input a non-dimensional Strouhal number which relates the length scale (panel size) and velocity scale (reference velocity) to the highest frequency of pressure fluctuation which is likely to affect the panel in Question. Wind tunnel measurements have been made of the pressure fluctuations on a simplified building model, a square prismatic cylinder, in smooth and turbulent uniform flows. Spectra and probability distributions have been obtained for various locations at various angles of the incident wind, where possible glass and cladding failure could occur. Careful calibration of the pressure measuring system ensured that a broad frequency range of pressure fluctuations was sensed. The measured probability distributions of the pressure fluctuations have been fitted by a Gaussian model for locations where the mean pressure coefficients are positive-going, and by a curve of the exponential type over other locations where the mean-pressure coefficients are definitely negative. The two statistical parameters required to fit the distributions in the latter case do not correlate well with the measured mean pressure coefficients. Once empirical values of the two parameters are obtained however, from experience or test, design of building elements to include the extreme values of negative (suction) pressures can be readily accomplished. Examples are given to demonstrate this procedure.
Resonance fluorescence spectral dynamics of an acoustically modulated quantum dot
Creators: name: Wigger, Daniel
name: Weiß, Matthias
name: Lienhart, Michelle
name: Müller, Kai
name: Finley, Jonathan J.
name: Kuhn, Tilmann
name: Krenner, Hubert J.
name: Machnikowski, Paweł
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Quantum technologies that rely on photonic qubits require a precise controllability of their properties. For this purpose hybrid approaches are particularly attractive because they offer a large flexibility to address different aspects of the photonic degrees of freedom. When combining photonics with other quantum platforms like phonons, quantum transducers have to be realized that convert between the mechanical and optical domain. Here, we realize this interface between phonons in the form of surface acoustic waves (SAWs) and single photons, mediated by a single semiconductor quantum dot exciton. In this combined theoretical and experimental study, we show that the different sidebands exhibit characteristic blinking dynamics that can be controlled by detuning the laser from the exciton transition. By developing analytical approximations we gain a better understanding of the involved internal dynamics. Our specific SAW approach allows us to reach the ideal frequency range of around 1 GHz that enables simultaneous temporal and spectral phonon sideband resolution close to the combined fundamental time-bandwidth limit.
MPEC 2024-S173 : 2024 SY4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 SY4

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.
Familieindkomststatistik 2017
Creators: Danmarks Statistik
Publisher: name: Rigsarkivet
Year: 2022

description: Hovedformålet med statistikken er at belyse størrelse, sammensætning og fordeling af indkomster for familier med bopæl i Danmark. Statistikken søger at inddrage så mange væsentlige indkomstarter som muligt uden hensyn til, hvordan indkomsterne behandles skattemæssigt.
Discriminative Latent Semantic Graph for Video Captioning
Creators: name: Bai, Yang
name: Wang, Junyan
name: Long, Yang
name: Hu, Bingzhang
name: Song, Yang
name: Pagnucco, Maurice
name: Guan, Yu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Video captioning aims to automatically generate natural language sentences that can describe the visual contents of a given video. Existing generative models like encoder-decoder frameworks cannot explicitly explore the object-level interactions and frame-level information from complex spatio-temporal data to generate semantic-rich captions. Our main contribution is to identify three key problems in a joint framework for future video summarization tasks. 1) Enhanced Object Proposal: we propose a novel Conditional Graph that can fuse spatio-temporal information into latent object proposal. 2) Visual Knowledge: Latent Proposal Aggregation is proposed to dynamically extract visual words with higher semantic levels. 3) Sentence Validation: A novel Discriminative Language Validator is proposed to verify generated captions so that key semantic concepts can be effectively preserved. Our experiments on two public datasets (MVSD and MSR-VTT) manifest significant improvements over state-of-the-art approaches on all metrics, especially for BLEU-4 and CIDEr. Our code is available at https://github.com/baiyang4/D-LSG-Video-Caption.
description: accepted by ACM MM 2021
Additional file 5 of Genetic diversity and population divergence of Leonurus japonicus and its distribution dynamic changes from the last interglacial to the present in China
Creators: name: Wang, Yiheng
name: Wang, Jingyi
name: Garran, Thomas Avery
name: Liu, Hangxiu
name: Lin, Huaibin
name: Luo, Jun
name: Yuan, Qingjun
name: Sun, Jiahui
name: Dong, Wenpan
name: Guo, Lanping
Publisher: name: figshare
Year: 2023
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified

description: Supplementary Material 5
Large peaks in the entropy of the diluted nearest-neighbor spin-ice model on the pyrochlore lattice in a [111] magnetic field
Creators: name: Andriushchenko, Petr
name: Soldatov, Konstantin
name: Peretyatko, Alexey
name: Shevchenko, Yuriy
name: Nefedev, Konstantin
name: Otsuka, Hiromi
name: Okabe, Yutaka
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the residual entropy of the nearest-neighbor spin-ice model in a magnetic field along the [111] direction using the Wang-Landau Monte Carlo method, with a special attention to dilution effects. For a diluted model, we observe a stepwise decrease of the residual entropy as a function of the magnetic field, which is consistent with the finding of the five magnetization plateaus in a previous replica-exchange Monte Carlo study by Peretyatko {\it et al.} [Phys. Rev. B {\bf 95}, 144410 (2017)]. We find large peaks of the residual entropy due to the degeneracy at the crossover magnetic fields, $h_c/J$ = 0, 3, 6, 9, and 12, where $h$ and $J$ are the magnetic field and the exchange coupling, respectively. In addition, we also study the residual entropy of the diluted antiferromagnetic Ising models in a magnetic field on the kagome and triangular lattices. We again observe large peaks of the residual entropy, which are associated with multiple magnetization plateaus for the diluted model. Finally, we discuss the interplay of dilution and magnetic fields in terms of the residual entropy.
On slowdown and speedup of transient random walks in random environment
Creators: name: Fribergh, Alexander
name: Gantert, Nina
name: Popov, Serguei
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K37

description: We consider one-dimensional random walks in random environment which are transient to the right. Our main interest is in the study of the sub-ballistic regime, where at time $n$ the particle is typically at a distance of order $O(n^κ)$ from the origin, $κ\in(0,1)$. We investigate the probabilities of moderate deviations from this behaviour. Specifically, we are interested in quenched and annealed probabilities of slowdown (at time $n$, the particle is at a distance of order $O(n^{ν_0})$ from the origin, $ν_0\in (0,κ)$), and speedup (at time $n$, the particle is at a distance of order $n^{ν_1}$ from the origin, $ν_1\in (κ,1)$), for the current location of the particle and for the hitting times. Also, we study probabilities of backtracking: at time $n$, the particle is located around $(-n^ν)$, thus making an unusual excursion to the left. For the slowdown, our results are valid in the ballistic case as well.
description: 43 pages, 4 figures; to appear in Probability Theory and Related Fields
BERT, mBERT, or BiBERT? A Study on Contextualized Embeddings for Neural Machine Translation
Creators: name: Xu, Haoran
name: Van Durme, Benjamin
name: Murray, Kenton
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: The success of bidirectional encoders using masked language models, such as BERT, on numerous natural language processing tasks has prompted researchers to attempt to incorporate these pre-trained models into neural machine translation (NMT) systems. However, proposed methods for incorporating pre-trained models are non-trivial and mainly focus on BERT, which lacks a comparison of the impact that other pre-trained models may have on translation performance. In this paper, we demonstrate that simply using the output (contextualized embeddings) of a tailored and suitable bilingual pre-trained language model (dubbed BiBERT) as the input of the NMT encoder achieves state-of-the-art translation performance. Moreover, we also propose a stochastic layer selection approach and a concept of dual-directional translation model to ensure the sufficient utilization of contextualized embeddings. In the case of without using back translation, our best models achieve BLEU scores of 30.45 for En->De and 38.61 for De->En on the IWSLT'14 dataset, and 31.26 for En->De and 34.94 for De->En on the WMT'14 dataset, which exceeds all published numbers.
description: EMNLP 2021
AstroSat study of the globular cluster NGC 2298: probable evolutionary scenarios of hot HB stars
Creators: name: Rani, Sharmila
name: Pandey, Gajendra
name: Subramaniam, Annapurni
name: Chung, Chul
name: Sahu, Snehalata
name: Rao, N. Kameswara
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the far-UV (FUV) photometry of images acquired with UVIT on AstroSat to probe the horizontal branch (HB) population of the Galactic globular cluster NGC 2298. UV-optical color-magnitude diagrams (CMDs) are constructed for member stars in combination with HST UV Globular Cluster Survey (HUGS) data for the central region and Gaia and ground-based photometric data for the outer region. Blue HB (BHB) sequence with a spread and four hot HB stars are detected in all FUV-optical CMDs and are compared with theoretical updated BaSTI isochrones and synthetic HB models with a range in helium abundance, suggesting that the hot HB stars are helium enhanced when compared to the BHB. The estimated effective temperature, radius, and luminosity of HB stars, using best SED fits, were compared with various HB models. BHB stars span a temperature range from 7,500-12,250 K. The three hot HB stars have 35,000-40,000 K, whereas one star has around 100,000K. We suggest the following evolutionary scenarios: two stars are likely to be the progeny of extreme HB (EHB) stars formed through an early hot-flasher scenario; one is likely to be an EHB star with probable helium enrichment, the hottest HB star is about to enter the WD cooling phase, could have evolved from BHB phase. Nevertheless, these are interesting spectroscopic targets to understand the late stages of evolution.
description: 25 pages, 12 figures, 5 tables, Accepted for publication in ApJ
Multipartite separability of Laplacian matrices of graphs
Creators: name: Wu, Chai Wah
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently, Braunstein et al. [1] introduced normalized Laplacian matrices of graphs as density matrices in quantum mechanics and studied the relationships between quantum physical properties and graph theoretical properties of the underlying graphs. We provide further results on the multipartite separability of Laplacian matrices of graphs. In particular, we identify complete bipartite graphs whose normalized Laplacian matrix is multipartite entangled under any vertex labeling. Furthermore, we give conditions on the vertex degrees such that there is a vertex labeling under which the normalized Laplacian matrix is entangled. These results address an open question raised in [1]. Finally, we extend some of the results in [1,2] to the multipartite case and show that the Laplacian matrix of any product of graphs (strong, Cartesian, tensor, categorical, etc.) is multipartite separable.
description: 13 pages, 1 figure
Intra-day variability of BL Lacertae from 2016 to 2018
Creators: name: Li, Tian
name: Wu, Jianghua
name: Meng, Nankun
name: Dai, Yan
name: Zhang, Xiaoyuan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We monitored BL Lacertae in the B, V, R and I bands for 14 nights during the period of 2016-2018. The source showed significant intraday variability on 12 nights. We performed colour-magnitude analysis and found that the source exhibited bluer-when-brighter chromatism. This bluer-when-brighter behavior is at least partly caused by the larger variation amplitude at shorter wavelength. The variations at different wavelengths are well correlated and show no inter-band time lag.