cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Analytic structure of many-body Coulombic wave functions
Creators: name: Fournais, Søren
name: Hoffmann-Ostenhof, Maria
name: Hoffmann-Ostenhof, Thomas
name: Sørensen, Thomas Østergaard
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 35B65, 35J10, 35B45, 81Q05, 35J15, 81V55

description: We investigate the analytic structure of solutions of non-relativistic Schr"odinger equations describing Coulombic many-particle systems. We prove the following: Let psi(x) with x=(x_1,...,x_N) in R^{3N} denote an N-electron wavefunction of such a system with one nucleus fixed at the origin. Then in a neighbourhood of a coalescence point, for which x_1=0 and the other electron coordinates do not coincide, and differ from 0, psi can be represented locally as psi(x) = psi^(1)(x) + |x_1|psi^(2)(x) with psi^(1), psi^(2) real analytic. A similar representation holds near two-electron coalescence points. The Kustaanheimo-Stiefel transform and analytic hypoellipticity play an essential role in the proof.
description: 23 pages
New properties of z-scaling: flavor independence and saturation at low z
Creators: name: Zborovsky, I.
name: Tokarev, M. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Experimental data on inclusive cross sections of particles produced in high energy proton-(anti)proton collisions at ISR, RHIC, and Tevatron are analyzed in the framework of $z$-scaling. New features of the scaling function $ψ(z)$ are established. These are flavor independence of $ψ(z)$ including particles with heavy flavor content and saturation at low $z$. The flavor independence means that the shape of the scaling function $ψ(z)$ is the same for different hadron species. The saturation corresponds to flattening of $ψ(z)$ for $z<0.1$. Relations of model parameters used in data $z$-presentation with some thermodynamical quantities (entropy, specific heat, temperature) are discussed. It is shown that behavior of the particle spectra at low $z$ is controlled by a parameter $c$ interpreted as a specific heat of the created medium associated with production of the inclusive particle. The saturation regime of $ψ(z)$ observed at low $z$ is assumed to be preferable in searching for phase transitions of hadron matter and for study of non-perturbative QCD in high energy proton-(anti)proton collisions at U70, RHIC, Tevatron, and LHC.
description: 20 pages, 17 figures
Nonlinear stability of the Taub-NUT soliton in 6+1 dimensions
Creators: name: Lipert, Marek
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Using mixed numerical and analytical methods we give evidence that the 6+1 dimensional Taub-NUT soliton is asymptotically nonlinearly stable against small perturbations preserving biaxial Bianchi IX symmetry. We also show that for sufficiently strong perturbations the soliton collapses to a warped black hole. Since this black hole solution is not known in closed form, for completeness of the exposition we prove its existence and determine its properties. In particular, the mass of the black hole is computed.
description: 19 pages, 5 figures
Viscous damping of r-mode oscillations in compact stars with quark matter
Creators: name: Jaikumar, Prashanth
name: Rupak, Gautam
name: Steiner, Andrew W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We determine characteristic timescales for the viscous damping of r-mode oscillations in rapidly rotating compact stars that contain quark matter. We present results for the color-flavor-locked (CFL) phase of dense quark matter, in which the up, down and strange quarks are gapped, as well as the normal (ungapped) quark phase. While the ungapped quark phase supports a temperature window between 10^8 K and 5x10^9 K where the r-mode is damped even for rapid rotation, the r-mode in a rapidly rotating pure CFL star is not damped in the temperature range 10^10 K - 10^11 K. Rotating hybrid stars with quark matter cores display an instability window whose width is determined by the amount of quark matter present, and they can have large spin frequencies outside this window. Except at high temperatures T > 10^10 K, the presence of a quark phase allows for larger critical frequencies and smaller spin-periods compared to rotating neutron stars. If low-mass X-ray binaries contain a large amount of ungapped or CFL quark matter, then our estimates of the r-mode instability suggest that there should be a population of rapidly rotating binaries at frequencies greater than 1000 Hz which have not yet been observed.
description: 22 pages, 4 figures, 2 tables, LaTeX2e; typos corrected, references added
ปัจจัยเชิงสาเหตุที่มีอิทธิพลต่อการคงอยู่ในองค์การ ของพนักงานมหาวิทยาลัยสายวิชาการในประเทศไทย
Creators: name: ศรัณย์ พิมพ์ทอง
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี มหาวิทยาลัยธรรมศาสตร์
Year: 2014
Subjects: การคงอยู่ในองค์การ; พนักงานมหาวิทยาลัยสายวิชาการ; ความสัมพันธ์เชิงสาเหตุ

description: 142 (เม.ย.-มิ.ย. 57), 37, วารสารบริหารธุรกิจ JBA
Optical properties of graphene: the Fermi liquid approach
Creators: name: Katsnelson, M. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Optical properties of two-dimensional massless Dirac fermions are considered by the formalism of pseudospin precession equations which provides an easy and natural semiphenomenological way to include correlation effects. It is shown that the latter are negligible, with the only assumption that the system under consideration is normal Fermi liquid. This result probably explains recent experimental data on the universal optical conductivity of graphene (Nair R. R. et al, Science 320 (2008) 1308).
description: 3 pages
Relationships between Mutagen-induced DNA repair, chromosome aberrations and sister chromatid exchanges
Creators: name: MacRae, W. Donald
Publisher: name: University of British Columbia
Year: 2010

description: The induction of sister chromatid exchanges(SCEs) and chromosome aberrations by mutagenic agents was examined in normal human and xeroderma pigmentosum cells and Chinese hamster ovary (CHO) cells. The effects of the alteration of 5'-bromodeoxyuridine concentration on the spontaneous and mutagen-induced SCE frequency, the time of treatment and sampling, and the duration of mutagen treatment were each considered with respect to the applicability of the technique, as a test for detecting mutagenic and carcinogenic agents. SCE induction by U.V. light,4-nitroquinoline 1-oxide and N-methyl-N'-nitro-nitrosoguanidine in xeroderma pigmentosum and normal human cells was studied as a possible means of examining the relationships between unscheduled DNA synthesis, chromosome aberrations and SCEs. Xeroderma pigmentosum cells were more responsive than normal cells with respect to SCE formation after treatment with each of these mutagenic agents. To further probe the relationships between SCEs, chromosome aberrations, DNA repair and cell survival, the response of cells arrested by amino-acid deprivation to mutagen treatment was examined. CHO cells were arrested by arginine deprivation and treated with mutagen. They were found to be markedly more sensitive than dividing cells, showing a reduced survival and an elevated frequency of chromosome aberrations. No removal of those lesions which produced chromosome aberrations was detected after post-treatment incubation in arginine deficient medium. U.V.-induced SCEs, on the other hand, could be reduced in number by holding the cells in arginine deficient medium for 24 hours after irradiation. This phenomenon, which was interpreted as the removal of SCE-producing lesions, was not observed after treatment with either of the alkylating agents N-methyl-N'-nitro-nitrosoguanidine or mitomycin C. The implications of these findings with respect to mammalian DNA repair mechanisms are discussed.
Fairness Criteria and Thresholding in Automated Predictions and Decisions
Creators: name: Lagioia, Francesca
name: Rovatti, Riccardo
name: Sartor, Giovanni
Publisher: name: Zenodo
Year: 2021
Subjects: Fairness, Group-parity, Classifiers, COMPAS, Automated decision, Affirmative action

description: Machine learning classifiers are increasingly used to inform, or even make, decisions significantly affecting human lives. Fairness concerns have spawned a number of contributions aimed at both identifying and addressing unfairness in algorithmic decision-making. This paper critically discusses the adoption of group-parity criteria (e.g., demographic parity, equality of opportunity, treatment equality) as fairness standards. To this end, we evaluate the use of machine learning methods relative to different steps of the decision-making process: assigning a predictive score, linking a classification to the score, and adopting decisions based on the classification. Throughout our inquiry we have used the COMPAS system, complemented by a radical simplification of it (our SAPMOC I and SAPMOC II models), as our running examples. Through these examples, we show how a system that is equally accurate for two groups may fail to comply with group-parity standards owing to different base rates in the population. We discuss the general properties of the statistics determining the satisfaction of group-parity criteria and levels of accuracy. Using the distinction between scoring, classifying, and deciding, we argue that equalisation of classifications/decisions between groups can be achieved thorough group-dependent thresholding. We discuss contexts in which this approach may be meaningful and useful in pursuing policy objectives. We claim that the implementation of group-parity standards should be left to competent human decision-makers, under appropriate scrutiny, since it involves discretionary value-based political choices. Accordingly, predictive systems should be designed in such a way that relevant policy goals can be transparently implemented.
Adaptation to Inexactness for some Gradient-type Methods
Creators: name: Stonyakin, Fedor S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We introduce a notion of inexact model of a convex objective function, which allows for errors both in the function and in its gradient. For this situation, a gradient method with an adaptive adjustment of some parameters of the model is proposed and an estimate for the convergence rate is found. This estimate is optimal on a class of sufficiently smooth problems in the presence of errors. We consider a special class of convex nonsmooth optimization problems. In order to apply the proposed technique to this class, an artificial error should be introduced. We show that the method can be modified for such problems to guarantee a convergence in the function with a nearly optimal rate on the class of convex nonsmooth optimization problems. An adaptive gradient method is proposed for objective functions with some relaxation of the Lipschitz condition for the gradient that satisfy the Polyak--Lojasievicz gradient dominance condition. Here, the objective function and its gradient can be given inexactly. The adaptive choice of the parameters is performed during the operation of the method with respect to both the Lipschitz constant of the gradient and a value corresponding to the error of the gradient and the objective function. The linear convergence of the method is justified up to a value associated with the errors.
description: in Russian
$ZZ$ production at nNNLO+PS with MiNNLO$_{\text{PS}}$
Creators: name: Buonocore, Luca
name: Koole, Gabriël
name: Lombardi, Daniele
name: Rottoli, Luca
name: Wiesemann, Marius
name: Zanderighi, Giulia
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider $ZZ$ production in hadronic collisions and present state-of-the-art predictions in QCD perturbation theory matched to parton showers. Next-to-next-to-leading order corrections to the quark-initiated channel are combined with parton showers using the MiNNLO$_{\text{PS}}$ method, while next-to-leading order corrections to the loop-induced gluon fusion channel are matched using the POWHEG method. Their combination, dubbed nNNLO+PS, constitutes the best theoretical description of $ZZ$ events to date. Spin correlations, interferences and off-shell effects are included by calculating the full process $pp \to \ell^+\ell^-\ell^{(\prime)+}\ell^{(\prime)-}$. We show the crucial impact of higher-order corrections for both quark- and gluon-initiated processes as well as the relevance of the parton shower in certain kinematical regimes. Our predictions are in very good agreement with recent LHC data.
description: 32 pages, 7 figures, 2 tables
A categorical approach to cyclic duality
Creators: name: Böhm, Gabriella
name: Stefan, Dragos
Publisher: name: arXiv
Year: 2009
Subjects: subject: K-Theory and Homology (math.KT)
subject: Category Theory (math.CT)
subject: FOS: Mathematics
subject: 16E40 (Primary), 18G30 (Secondary), 16W30

description: The aim of this paper is to provide a unifying categorical framework for the many examples of para-(co)cyclic modules arising from Hopf cyclic theory. Functoriality of the coefficients is immediate in this approach. A functor corresponding to Connes's cyclic duality is constructed. Our methods allow, in particular, to extend Hopf cyclic theory to (Hopf) bialgebroids.
description: LaTeX 2e, 47 pages, lots of figures. v2: the same mathematical content as in v1 is presented via string diagrams. Final version to appear in J. Noncommutative Geometry
The shear dynamo problem for small magnetic Reynolds numbers
Creators: name: Sridhar, S.
name: Singh, Nishant K.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study large-scale dynamo action due to turbulence in the presence of a linear shear flow, in the low conductivity limit. Our treatment is nonperturbative in the shear strength and makes systematic use of both the shearing coordinate transformation and the Galilean invariance of the linear shear flow. The velocity fluctuations are assumed to have low magnetic Reynolds number (Rm) but could have arbitrary fluid Reynolds number. The magnetic fluctuations are determined to lowest order in Rm by explicit calculation of the resistive Green's function for the linear shear flow. The mean electromotive force is calculated and an integro-differential equation is derived for the time evolution of the mean magnetic field. In this equation, velocity fluctuations contribute to two different kinds of terms, the C and D terms, in which first and second spatial derivatives of the mean magnetic field, respectively, appear inside the spacetime integrals. The contribution of the D terms is such that the time evolution of the cross-shear components of the mean field do not depend on any other components excepting themselves. Therefore, to lowest order in Rm but to all orders in the shear strength, the D terms cannot give rise to a shear-current assisted dynamo effect. Casting the integro-differential equation in Fourier space, we show that the normal modes of the theory are a set of shearing waves, labelled by their sheared wavevectors. The integral kernels are expressed in terms of the velocity spectrum tensor, which is the fundamental quantity that needs to be specified to complete the integro-differential equation description of the time evolution of the mean magnetic field.
description: Near-final version; Accepted for publication in the Journal of Fluid Mechanics; References added; 22 pages, 2 figures
Competition between Discrete Random Variables, with Applications to Occupancy Problems
Creators: name: Eaton, Julia
name: Godbole, Anant
name: Sinclair, Betsy
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 60C05

description: Consider $n$ players whose "scores" are independent and identically distributed values $\{X_i\}_{i=1}^n$ from some discrete distribution $F$. We pay special attention to the cases where (i) $F$ is geometric with parameter $p\to0$ and (ii) $F$ is uniform on $\{1,2,...,N\}$; the latter case clearly corresponds to the classical occupancy problem. The quantities of interest to us are, first, the $U$-statistic $W$ which counts the number of "ties" between pairs $i,j$; second, the univariate statistic $Y_r$, which counts the number of strict $r$-way ties between contestants, i.e., episodes of the form ${X_i}_1={X_i}_2=...={X_i}_r$; $X_j\ne {X_i}_1;j\ne i_1,i_2,...,i_r$; and, last but not least, the multivariate vector $Z_{AB}=(Y_A,Y_{A+1},...,Y_B)$. We provide Poisson approximations for the distributions of $W$, $Y_r$ and $Z_{AB}$ under some general conditions. New results on the joint distribution of cell counts in the occupancy problem are derived as a corollary.
description: 21 pages
Hydrodynamic correlations in the translocation of biopolymer through a nanopore: theory and multiscale simulations
Creators: name: Fyta, Maria
name: Melchionna, Simone
name: Succi, Sauro
name: Kaxiras, Efthimios
Publisher: name: arXiv
Year: 2008
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We investigate the process of biopolymer translocation through a narrow pore using a multiscale approach which explicitly accounts for the hydrodynamic interactions of the molecule with the surrounding solvent. The simulations confirm that the coupling of the correlated molecular motion to hydrodynamics results in significant acceleration of the translocation process. Based on these results, we construct a phenomenological model which incorporates the statistical and dynamical features of the translocation process and predicts a power law dependence of the translocation time on the polymer length with an exponent $α$ $\approx 1.2$. The actual value of the exponent from the simulations is $α= 1.28 \pm 0.01$, which is in excellent agreement with experimental measurements of DNA translocation through a nanopore, and is not sensitive to the choice of parameters in the simulation. The mechanism behind the emergence of such a robust exponent is related to the interplay between the longitudinal and transversal dynamics of both translocated and untranslocated segments. The connection to the macroscopic picture involves separating the contributions from the blob shrinking and shifting processes, which are both essential to the translocation dynamics.
description: 7 pages, 5 figures. to appear in Phys. Rev. E
Fermionisation dynamics of a strongly interacting 1D Bose gas after an interaction quench
Creators: name: Muth, Dominik
name: Schmidt, Bernd
name: Fleischhauer, Michael
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We study the dynamics of a one-dimensional Bose gas after a sudden change of the interaction strength from zero to a finite value using the numerical time-evolving block decimation (TEBD) algorithm. It is shown that despite the integrability of the system, local quantities such as the two-particle correlation $g^{(2)}(x,x)$ attain steady state values in a short characteristic time inversely proportional to the Tonks parameter $γ$ and the square of the density. The asymptotic values are very close to those of a finite temperature grand canonical ensemble with a local temperature corresponding to initial energy and density. Non-local density-density correlations on the other hand approach a steady state on a much larger time scale determined by the finite propagation velocity of oscillatory correlation waves.
description: 11 pages, 5 figures, extended
Confidential Token-Based License Management
Creators: name: Engelmann, Felix
name: Speichert, Jan Philip
name: God, Ralf
name: Kargl, Frank
name: Bösch, Christoph
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: In a global economy with many competitive participants, licensing and tracking of 3D printed parts is desirable if not mandatory for many use-cases. We investigate a blockchain-based approach, as blockchains provide many attractive features, like decentralized architecture and high security assurances. An often neglected aspect of the product life-cycle management is the confidentiality of transactions to hide valuable business information from competitors. To solve the combined problem of trust and confidentiality, we present a confidential licensing and tracking system which works on any publicly verifiable, token-based blockchain that supports tokens of different types representing licenses or attributes of parts. Together with the secure integration of a unique eID in each part, our system provides an efficient, immutable and authenticated transaction log scalable to thousands of transactions per second. With our confidential Token-Based License Management system (cTLM), large industries such as automotive or aviation can license and trace all parts confidentially.
description: To be published in the proceedings of the 2021 Workshop on Additive Manufacturing (3D Printing) Security (AMSec '21)
An automated threshold Edge Drawing algorithm
Creators: name: Orhei, Ciprian
name: Mocofan, Muguras
name: Vert, Silviu
name: Vasiu, Radu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Parameter choosing in classical edge detection algorithms can be a costly and complex task. Choosing the correct parameters can improve considerably the resulting edge-map. In this paper we present a version of Edge Drawing algorithm in which we include an automated threshold choosing step. To better highlight the effect of this additional step we use different first order operators in the algorithm. Visual and statistical results are presented to sustain the benefits of the proposed automated threshold scheme.
Small x resummation in collinear factorisation
Creators: name: Kirschner, R.
name: Segond, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The summation of the small x-corrections to hard-scattering QCD amplitudes by collinear factorisation method is reconsidered and the K-factor is derived in leading ln x approximation with a result differing from the corresponding expression by Catani and Hautmann (Nucl. Phys. B 427, 475, 1994). The significance of the difference is demonstrated in the examples of structure function F_L and of exclusive vector meson electroproduction. The formulation covers the channels of non-vanishing conformal spin n paving the way for new applications.
description: 34 pages, 6 figures
AstronomicAL: An interactive dashboard for visualisation, integration and classification of data using Active Learning
Creators: name: Stevens, Grant
name: Fotopoulou, Sotiria
name: Bremer, Malcolm N.
name: Ray, Oliver
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Human-Computer Interaction (cs.HC)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: AstronomicAL is a human-in-the-loop interactive labelling and training dashboard that allows users to create reliable datasets and robust classifiers using active learning. This technique prioritises data that offer high information gain, leading to improved performance using substantially less data. The system allows users to visualise and integrate data from different sources and deal with incorrect or missing labels and imbalanced class sizes. AstronomicAL enables experts to visualise domain-specific plots and key information relating both to broader context and details of a point of interest drawn from a variety of data sources, ensuring reliable labels. In addition, AstronomicAL provides functionality to explore all aspects of the training process, including custom models and query strategies. This makes the software a tool for experimenting with both domain-specific classifications and more general-purpose machine learning strategies. We illustrate using the system with an astronomical dataset due to the field's immediate need; however, AstronomicAL has been designed for datasets from any discipline. Finally, by exporting a simple configuration file, entire layouts, models, and assigned labels can be shared with the community. This allows for complete transparency and ensures that the process of reproducing results is effortless
description: 7 pages, 4 figures, Journal of Open Source Software
PPM-Extended (PPMX) - a catalogue of positions and proper motions
Creators: name: Roeser, S.
name: Schilbach, E.
name: Schwan, H.
name: Kharchenko, N. V.
name: Piskunov, A. E.
name: Scholz, R. -D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims: We build a catalogue PPM-Extended (PPMX) on the ICRS system which is complete down to a well-defined limiting magnitude and contains the best presently available proper motions to be suited for kinematical studies in the Galaxy. Methods: We perform a rigorous weighted least-squares adjustment of individual observations, spread over more than a century, to determine mean positions and proper motions. The stellar content of PPMX is taken from GSC 1.2 supplemented by catalogues like ARIHIP, PPM and Tycho-2 at the bright end. All observations have been weighted according to their individual accuracy. The catalogue has been screened towards rejecting false entries in the various source catalogues. Results: PPM-Extended (PPMX) is a catalogue of 18,088,920 stars containing astrometric and photometric information. Its limiting magnitude is about 15.2 in the GSC photometric system. PPMX consists of three parts: a) a survey complete down to R_U = 12.8 in the magnitude system of UCAC2; b) additional stars of high-precision proper motions, and c) all other stars from GSC 1.2 identified in 2MASS. The typical accuracy of the proper motions is 2mas/y for 66 percent of the survey stars (a) and the high-precision stars (b), and about 10 mas/y for all other stars. PPMX contains photometric information from ASCC-2.5 and 2MASS.
description: 9 pages, 8 figures, accepted for publication in Astronomy and Astrophysics
Person Re-identification via Attention Pyramid
Creators: name: Chen, Guangyi
name: Gu, Tianpei
name: Lu, Jiwen
name: Bao, Jin-An
name: Zhou, Jie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In this paper, we propose an attention pyramid method for person re-identification. Unlike conventional attention-based methods which only learn a global attention map, our attention pyramid exploits the attention regions in a multi-scale manner because human attention varies with different scales. Our attention pyramid imitates the process of human visual perception which tends to notice the foreground person over the cluttered background, and further focus on the specific color of the shirt with close observation. Specifically, we describe our attention pyramid by a "split-attend-merge-stack" principle. We first split the features into multiple local parts and learn the corresponding attentions. Then, we merge local attentions and stack these merged attentions with the residual connection as an attention pyramid. The proposed attention pyramid is a lightweight plug-and-play module that can be applied to off-the-shelf models. We implement our attention pyramid method in two different attention mechanisms including channel-wise attention and spatial attention. We evaluate our method on four largescale person re-identification benchmarks including Market-1501, DukeMTMC, CUHK03, and MSMT17. Experimental results demonstrate the superiority of our method, which outperforms the state-of-the-art methods by a large margin with limited computational cost.
description: Accepted by IEEE Transcations on Image Processing. Code available at https://github.com/CHENGY12/APNet
title: Συστήματα υποστήριξης αποφάσεων για ελαχιστοποίηση λειτουργικού κόστους μεγάλων οργανισμών: Το κλειστό κολυμβητήριο «ΚΥΠΡΟΣ» της Στρατιωτικής Σχολής Ευελπίδων
Creators: name: Σταυροπουλος Ιωαννης
Publisher: name: Technical University of Crete
Year: 2020

description: Η παρούσα μεταπτυχιακή εργασία πραγματεύεται τρόπους με τους οποίους μπορεί ένα σύστημα λήψης αποφάσεων να έχει τη βέλτιστη αποτελεσματικότητα στον τομέα της μείωσης του λειτουργικού κόστους μεγάλων οργανισμών και διοικητικών δομών.
Πιο εξειδικευμένα στη μεταπτυχιακή διατριβή παρουσιάζονται με αναλυτικό τρόπο οι κύριες πηγές λειτουργικών εξόδων του κλειστού κολυμβητηρίου «ΚΥΠΡΟΣ» της Στρατιωτικής Σχολής Ευελπίδων. Παράλληλα προτείνονται τρόποι μείωσης αυτών των λειτουργικών εξόδων της εγκατάστασης, έτσι ώστε αυτά να ελαχιστοποιηθούν στο ελάχιστο.
Η σημασία της προσπάθειας ελαχιστοποίησης του κόστους λειτουργίας του κλειστού κολυμβητηρίου «ΚΥΠΡΟΣ» είναι τεράστια τόσο για την ίδια την εγκατάσταση όσο και ευρύτερα για τη Στρατιωτική Σχολή Ευελπίδων. Αυτό φαίνεται χαρακτηριστικά από τους παρακάτω ενδεικτικούς λόγους:
	Εξοικονόμιση πόρων.
	Ποιοτικότερη οικονομική βιωσιμότητα της δομής.
	Καλύτερη απόδοση της εργασίας του προσωπικού της εγκατάστασης μέσω της εισαγωγής καινοτόμων λύσεων και αυτοματισμών.
	Προστασία του περιβάλλοντος μέσω της μείωσης των ενεργειακών καταναλώσεων και των εκπεμπόμενων ρύπων στην ατμόσφαιρα.
Τέλος η εργασία έχει χωριστεί σε δύο τμήματα. Στο πρώτο θα γίνει προσέγγιση του προβλήματος ως δομημένο. Μέσω της προσέγγισης αυτής θα προταθούν πεπερασμένες, αριθμήσιμες και φραγμένες λύσεις των οποίων η αποτελεσματικότητα και η αποδοτικότητα μπορεί να εκτιμηθεί αριθμητικά. Στο δεύτερο τμήμα της εργασίας θα υπάρξει προσέγγιση του προβλήματος ως αδόμητο. Με απλά λόγια το πρόβλημα θα ερμηνευτεί με πολλούς διαφορετικούς τρόπους ανάλογα με την οπτική γωνία εξέτασής του και αυτό συνεπάγεται ότι δεν υπάρχει κριτήριο που να διαβεβαιώνει ότι όλες οι πιθανές λύσεις προσδιορίστηκαν και εξετάστηκαν.
Two Jupiter-Mass Planets Orbiting HD 154672 and HD 205739
Creators: name: Lopez-Morales, Mercedes
name: Butler, R. Paul
name: Fischer, Debra A.
name: Minniti, Dante
name: Shectman, Stephen A.
name: Takeda, Genya
name: Adams, Fred C.
name: Wright, Jason T.
name: Arriagada, Pamela
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the detection of the first two planets from the N2K Doppler planet search program at the Magellan telescopes. The first planet has a mass of M sin i = 4.96 M_Jup and is orbiting the G3 IV star HD154672 with an orbital period of 163.9 days. The second planet is orbiting the F7 V star HD205739 with an orbital period of 279.8 days and has a mass of M sin i = 1.37 M_Jup. Both planets are in eccentric orbits, with eccentricities e = 0.61 and e = 0.27, respectively. Both stars are metal rich and appear to be chromospherically inactive, based on inspection of their Ca II H and K lines. Finally, the best Keplerian model fit to HD205739b shows a trend of 0.0649 m/s/day, suggesting the presence of an additional outer body in that system.
description: 16 pages, 5 figures, accepted for publication on AJ
Predicting Roughness Effects on Velocity and Temperature in Turbulent Flow - A Data-Driven Approach
Creators: name: Dalpke, Simon Benedikt
name: Yang, Jiasheng
name: Stroh, Alexander
name: Frohnapfel, Bettina
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2024
Subjects: GPU-Computing
Roughness
Symbolic Regression
Neural Network

description: Accurately predicting the impact of arbitrary rough surfaces on turbulent fluid flow is crucial for industrial applications and for enhancing the precision of RANS simulations. Thermohydraulic turbulent roughness properties, specifically the augmentation in velocity $\Delta U^+$ and temperature $\Delta \Theta^+$, describe this effect, but their prediction for a rough surface currently requires a detailed simulation. Recently, the application of neural networks for these types of predictions have been developed to circumvent the costly simulations. $93$ high fidelity direct numerical simulations of a fully-developed turbulent channel flow at $Re_{\tau} \approx 800$ with artificially generated realistic rough surfaces provide a sufficient database for training, validation, and testing of a neural network architecture with strong predictive capabilities for $\Delta U^+$. For better explainability of the 'black-box' model, a genetic programming technique, namely symbolic regression, is applied to translate the data-driven model into an understandable, simple expressions using well-known statistical parameters. Nevertheless, the prediction of the temperature augmentation using an analog procedure remains insufficient, particularly since the dependencies on the Prandtl number $Pr$ have not yet fully been investigated.

As supercomputing facilities are transitioning towards heterogeneous cluster architectures and GPU accelerated computation showed massive speed-up in other domains, using these new capabilities to overcome the data limitation motivated the use of a GPU accelerated DNS-solver. Using this GPU-code for rough surface channel flow with non-conjugate heat transfer is tested, and the applicability for data generation on the Tier 2 Cluster HoreKa will be additionally discussed in the conference presentation.
High harmonic generation in fullerene molecules
Creators: name: Avetissian, H. K.
name: Ghazaryan, A. G.
name: Mkrtchian, G. F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Using dynamical Hartree-Fock mean-field theory, we study the high-harmonic generation (HHG) in the fullerene molecules C$_{60}$ and C$_{70}$ under strong pump wave driving. We consider a strong-field regime and show that the output harmonic radiation exhibits multiple plateaus, whose borders are defined by the molecular excitonic lines and cutoff energies within each plateau scale linearly with the field strength amplitude. In contrast to atomic cases for the fullerene molecule, with the increase of the pump wave photon energy the cutoff harmonic energy is increased. We also show that with the increase of the electron-electron interaction energy overall the HHG rate is suppressed. We demonstrate that the C$_{70}$ molecule shows richer HHG spectra and a stronger high-harmonic intensity than the C$_{60}$.
description: 6 pages, 5 figures
Fan-out enabled spin wave majority gate
Creators: name: Mahmoud, Abdulqader
name: Vanderveken, Frederic
name: Adelmann, Christoph
name: Ciubotaru, Florin
name: Hamdioui, Said
name: Cotofana, Sorin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: By its very nature, Spin Wave (SW) interference provides intrinsic support for Majority logic function evaluation. Due to this and the fact that the $3$-input Majority (MAJ3) gate and the Inverter constitute a universal Boolean logic gate set, different MAJ3 gate implementations have been proposed. However, they cannot be directly utilized for the construction of larger SW logic circuits as they lack a key cascading mechanism, i.e., fan-out capability. In this paper, we introduce a novel ladder-shaped SW MAJ3 gate design able to provide a maximum fan-out of 2 (FO2). The proper gate functionality is validated by means of micromagnetic simulations, which also demonstrate that the amplitude mismatch between the two outputs is negligible proving that an FO2 is properly achieved. Additionally, we evaluate the gate area and compare it with SW state-of-the-art and 15nm CMOS counterparts working under the same conditions. Our results indicate that the proposed structure requires 12x less area than the 15 nm CMOS MAJ3 gate and that at the gate level the fan-out capability results in 16% area savings, when compared with the state-of-the-art SW majority gate counterparts.
description: This work has received funding from the European Union's Horizon 2020 research and innovation program within the FET-OPEN project CHIRON under the grant agreement No. 801055
What should be done to decrease the incidence of human salmonellosis in Canada?
Creators: name: Ross, Andrew Francis
Publisher: name: University of British Columbia
Year: 2010

description: The thesis is concerned with what should be done to decrease the incidence of human salmonellosis in Canada. The present high incidence of Salmonella contaminated poultry is reviewed and evidence is given that links Salmonella contaminated poultry carcasses at the retail level to human salmonellosis. The question is raised as to whether control or eradication should be the goal in Canada, and present regulations involving various levels of Governments are examined. The incidence of Salmonella contaminated poultry in some other countries is reviewed, together with some of the Salmonella control programmes that have been instituted by these countries. Finally, certain recommendations are made, as to what could be done in Canada to decrease the incidence of human salmonellosis. These recommendations stress the need for further research to develop ways of decreasing the incidence of Salmonella contaminated poultry at the retail level. The colonization of the gut of day-old chickens with the intestinal flora of adult chickens is a method that shows promise. The use of radiation and chlorination of the poultry carcasses would also help to reduce the incidence of carcass contamination. If Canada is determined to reduce human salmonellosis, then steps must be taken to coordinate the many different branches of both the Federal and Provincial Governments, and regulations, when promulgated, must be enforced. Caterers and those cooking in their own homes must be educated on correct food handling practices and cooking techniques. Human salmonellosis will probably never be eradicated, but its present incidence could certainly be reduced.
Probing the Gluon Plasma with Charm Balance Functions
Creators: name: Basu, Sumit
name: Christiansen, Peter
name: Ohlson, Alice
name: Silvermyr, David
Publisher: name: arXiv
Year: 2021
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: Recent theoretical explanations for how hydrodynamic-like flow can build up quickly in small collision systems (hydrodynamization) has led to a microscopic picture of flow building up in a gluon-dominated phase before chemical equilibrium between quarks and gluons has been attained. The goal of this contribution to Offshell-2021 is to explore consequence of assuming a long-lived gluon-dominated phase, which we shall denote a gluon plasma (GP). As these consequences are naturally enhanced in a large systems, we assume and explore the extreme scenario in which a GP would be created in AA collisions and exist for significant time before the formation of a chemically-equilibrated quark-gluon plasma (QGP). The GP and its formation would be impossible to probe with light-quark hadrons, which are first produced later in this scenario. As charm quarks are produced early in the collision, they can circumvent the limitations of light quarks and we propose charm balance functions as an effective tool to test this idea and constrain the dynamics of the GP.
description: 9 pages, 5 figures. Prepared for "Offshell-2021" conference
A note on relativistic rocketry
Creators: name: Westmoreland, Shawn
Publisher: name: arXiv
Year: 2009
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: In the context of special relativity, we discuss the specific impulse of a rocket whose exhaust jet consists of massive and/or massless particles. This work generalizes previous results and corrects some errors of a recently published paper by U. Walter. (The errors stem from the omission of a Lorentz factor.)
description: includes an errata for the original preprint
title: Einleitung: Konsum als Vermittler globaler und lokaler Entwicklungen
Creators: name: Schrage, Dominik
Publisher: name: SSOAR -   GESIS Leibniz Institute for the Social Sciences
Year: 2019
Subjects: subject: 10205 Sociology of Economics
subject: consumption
subject: materialism

description: Komplexe Dynamiken globaler und lokaler Entwicklungen: Verhandlungen des 39. Kongresses der Deutschen Gesellschaft für Soziologie in Göttingen 2018
title: Effectiveness of flameless catalytic infrared radiation against life stages of three storedproduct insect species in stored wheat
Creators: name: Khamis, M.
name: Subramanyam, B.
name: Dogan, H.
name: Flinn, P. W.
name: Gwirtz, J. A.
Publisher: name: Julius Kühn-Institut
Year: 2010
Subjects: subject: infrared radiation
subject: stored-product insects
subject: non-chemical method
subject: efficacy assessment

description: Julius-Kühn-Archiv; 425; 695-700
title: Einleitung: Kulturelle Medien gesellschaftlicher Transformation
Creators: name: Schrage, Dominik
Publisher: name: SSOAR -   GESIS Leibniz Institute for the Social Sciences
Year: 2019
Subjects: subject: 10216 Cultural Sociology, Sociology of Art, Sociology of Literature
subject: media
subject: culture

description: Komplexe Dynamiken globaler und lokaler Entwicklungen: Verhandlungen des 39. Kongresses der Deutschen Gesellschaft für Soziologie in Göttingen 2018
The Fractional Langevin Equation: Brownian Motion Revisited
Creators: name: Mainardi, Francesco
name: Pironi, Paolo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 0J60, 60J65, 45E10, 45J05, 44A10, 33B20

description: We have revisited the Brownian motion on the basis of the fractional Langevin equation which turns out to be a particular case of the generalized Langevin equation introduced by Kubo on 1966. The importance of our approach is to model the Brownian motion more realistically than the usual one based on the classical Langevin equation, in that it takes into account also the retarding effects due to hydrodynamic backflow, i.e. the added mass and the Basset memory drag. On the basis of the two fluctuation-dissipation theorems and of the techniques of the Fractional Calculus we have provided the analytical expressions of the correlation functions (both for the random force and the particle velocity) and of the mean squared particle displacement. The random force has been shown to be represented by a superposition of the usual white noise with a "fractional" noise. The velocity correlation function is no longer expressed by a simple exponential but exhibits a slower decay, proportional to $t^{-3/2}$ as $t \to \infty$, which indeed is more realistic. Finally, the mean squared displacement has been shown to maintain, for sufficiently long times, the linear behaviour which is typical of normal diffusion, with the same diffusion coefficient of the classical case. However, the Basset history force induces a retarding effect in the establishing of the linear behaviour, which in some cases could appear as a manifestation of anomalous diffusion to be correctly interpreted in experimental measurements.
description: Plain TeX pre-print, 15 pages
title: Autopoietische Systeme und sympoietische Gefüge: Niklas Luhmann meets Donna Haraway
Creators: name: Hoppe, Katharina
Publisher: name: SSOAR -   GESIS Leibniz Institute for the Social Sciences
Year: 2019
Subjects: subject: 10201 General Sociology, Basic Research, General Concepts and History of Sociology, Sociological Theories
subject: Luhmann, Niklas
subject: evolution
subject: anthropocentrism
subject: social change
subject: autopoiesis

description: Der Beitrag diskutiert die evolutionstheoretischen Motive der Autopoiesis bei Niklas Luhmann und der Sympoiesis bei Donna Haraway, um deren Potentiale für eine soziologische Analyse ökologischer Gefährdung einerseits und eine post-anthropozentrische Sozialtheorie andererseits auszuloten. Es werden Affinitäten der beiden Ansätze herausgearbeitet, die für eine post-anthropozentrische Soziologie wegweisend sind. Die Idee selbstreferentiell operierender (Sub-)Systeme, die durch Ausdifferenzierung entstehen und sich durch Abgrenzung aufrechterhalten, die Luhmann entwickelt, lässt sich mit Haraway jedoch auch komplizieren. So geht Luhmanns Systemtheorie zu leichtfertig von der Unterscheidungskapazität von Systemen aus, die eine Differenzierung von Natur und Gesellschaft setzt. Eine sympoietische Perspektive lässt die Grenze zwischen Sozialem und Natürlichem erodieren und versteht Evolution als unfreiwilligen Prozess des Kooperierens, aber auch (Zer)Störens. Gesellschaft erscheint aus einer solchen Perspektive als Prozess, an dem eine Reihe heterogener Symbionten beteiligt sind, die sich durch systemische Selbstbeschreibung nicht gänzlich (her)einholen lassen. Nicht Ausdifferenzierung ist hier Triebwerk und Maßstab gesellschaftlicher Entwicklung, sondern auch die Komplizierung sozialer (oder besser: natürlichkultureller) Sachverhalte. Der Beitrag zeigt, wie sich dennoch ein Zusammenspiel beider Perspektiven in soziologischen Analysen ökologischer Gefährdung produktiv erweisen kann.
description: Komplexe Dynamiken globaler und lokaler Entwicklungen: Verhandlungen des 39. Kongresses der Deutschen Gesellschaft für Soziologie in Göttingen 2018
The Response of orchardgrass-ladino clover to the application of high-rise poultry manure in the Lower Fraser Valley
Creators: name: Maynard, Douglas George
Publisher: name: University of British Columbia
Year: 2010

description: Approximately 86% of the poultry population of British Columbia is concentrated in the lower Fraser Valley. Because many of these operations are located on small land areas adjacent to suburban developments, the management of the poultry manure is a major problem. Landspreading is still the most widely practised way of handling poultry manure. The objectives of this study were to determine maximum disposal rates and optimum fertilizer rates of high-rise poultry manure on orchardgrass and orchardgrass-clover forage. Experimentation with poultry manure rates of 1.25 to 40 tonnes per hectare applied to orchardgrass and orchardgrass-clover forage was carried out in the Chilliwhack district of the lower Fraser Valley over a 2-year period. The poultry manure contained 5.1, 2.5 and 2.0% N, P and K respectively in 1975, and 3.5, 1.6 and 1.4% N, P and K respectively in 1976, with coefficients of variation from 5 to. 40%. The N:P:K ratio in the manure indicated that K and P (in some cases) would be limiting if the manure was applied to meet the N requirements of the crop. The recommended rate of poultry manure determined for disposal was 20 t/ha/year on orchardgrass forage. A poultry manure rate of 10 t/ha/year on orchardgrass forage is recommended to efficiently utilize the N resource of the manure as a fertilizer. A poultry layer operation of 2500 hens would require 3.6 ha of orchardgrass forage to dispose of the poultry manure produced in one year and 7.3 ha of orchardgrass forage to utilize the manure efficiently as a fertilizer.