cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
High-throughput discovery of high-temperature conventional superconductors
Creators: name: Shipley, Alice M.
name: Hutcheon, Michael J.
name: Needs, Richard J.
name: Pickard, Chris J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We survey the landscape of binary hydrides across the entire periodic table from 10 to 500 GPa using a crystal structure prediction method. Building a critical temperature ($T_c$) model, with inputs arising from density of states calculations and Gaspari-Gyorffy theory, allows us to predict which energetically competitive candidates are most promising for high-$T_c$ superconductivity. Implementing optimisations, which lead to an order of magnitude speed-up for electron-phonon calculations, then allows us to perform an unprecedented number of "high-throughput" calculations of $T_c$ based on these predictions and to refine the model in an iterative manner. Converged electron-phonon calculations are performed for 121 of the best candidates from the final model. From these, we identify 36 above-100 K dynamically stable superconductors. To the best of our knowledge, superconductivity has not been previously studied in 27 of these. Of the 36, 18 exhibit superconductivity above 200 K, including structures of NaH$_6$ (248-279 K) and CaH$_6$ (216-253 K) at the relatively low pressure of 100 GPa.
BIOSSEGURANÇA EM LABORATÓRIO FÍSICO-QUÍMICO E BACTERIOLÓGICO DE ÁGUA
Creators: name: Gilmar Santana Lima
Publisher: name: Zenodo
Year: 2024

description: Este artigo tem como finalidade colaborar com a literatura, a respeito de um tema com pouco estudo na área, objetivando também contribuir com discussões relacionadas às normas de biossegurança com foco em profissionais que atuam em laboratório físico-químico e bacteriológico de água. Relacionando os riscos pertinentes a essa classe de trabalhador no seu campo de atuação, pautando as medidas que reduzam a exposição a riscos que afetam a saúde do trabalhador de laboratório e boas práticas relacionadas à rotina de trabalho, assim como o manuseio adequado dos equipamentos de proteção individual (EPI) e equipamentos de proteção coletiva (EPC).
XAI-N: Sensor-based Robot Navigation using Expert Policies and Decision Trees
Creators: name: Roth, Aaron M.
name: Liang, Jing
name: Manocha, Dinesh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We present a novel sensor-based learning navigation algorithm to compute a collision-free trajectory for a robot in dense and dynamic environments with moving obstacles or targets. Our approach uses deep reinforcement learning-based expert policy that is trained using a sim2real paradigm. In order to increase the reliability and handle the failure cases of the expert policy, we combine with a policy extraction technique to transform the resulting policy into a decision tree format. The resulting decision tree has properties which we use to analyze and modify the policy and improve performance on navigation metrics including smoothness, frequency of oscillation, frequency of immobilization, and obstruction of target. We are able to modify the policy to address these imperfections without retraining, combining the learning power of deep learning with the control of domain-specific algorithms. We highlight the benefits of our algorithm in simulated environments and navigating a Clearpath Jackal robot among moving pedestrians. (Videos at this url: https://gamma.umd.edu/researchdirections/xrl/navviper)
Self-Organization applied to Dynamic Network Layout
Creators: name: Geipel, Markus M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Data Structures and Algorithms (cs.DS)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: As networks and their structure have become a major field of research, a strong demand for network visualization has emerged. We address this challenge by formalizing the well established spring layout in terms of dynamic equations. We thus open up the design space for new algorithms. Drawing from the knowledge of systems design, we derive a layout algorithm that remedies several drawbacks of the original spring layout. This new algorithm relies on the balancing of two antagonistic forces. We thus call it {\em arf} for "attractive and repulsive forces". It is, as we claim, particularly suited for a dynamic layout of smaller networks ($n < 10^3$). We back this claim with several application examples from on going complex systems research.
description: Text revision and figures improved in v.2. See http://www.sg.ethz.ch for more info and examples
Βελτιστοποίηση αντιρρυπαντικού σχεδιασμού υβριδικών οχημάτων
Creators: name: Ζαχαροπούλου, Θεοδώρα Μ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Αντιρρύπανση
Υβριδικά οχήματα
Μοντελοποίηση οχήματος
Εκπομπές καυσαερίων ρύπων
Exhaust aftertreatment
Hybrid vehicles
Vehicle modelling
Exhaust emissions

description: Η παρούσα εργασία εντάσσεται στην περιοχή της αντιρρυπαντικής τεχνολογίας αυτοκινήτων και εστιάζει στις ιδιαιτερότητες που εμφανίζονται σε υβριδικά οχήματα. Στα οχήματα αυτά, ο συνδυασμός της μηχανής εσωτερικής καύσης με συστήματα ηλεκτροκίνησης οδηγεί σε σημαντικές διαφοροποιήσεις σχετικά με τις ιδιότητες του καυσαερίου που εκπέμπονται (θερμοκρασία, παροχή, σύσταση). Στο πλαίσιο της έρευνας διερευνώνται αρχικά οι επιπτώσεις διαφόρων επιπέδων υβριδοποίησης στα χαρακτηριστικά του καυσαερίου κατά τους νομοθετημένους κύκλους οδήγησης. Σε θεωρητικό επίπεδο αυτό επιτυγχάνεται με χρήση κατάλληλων μοντέλων προσομοίωσης του συστήματος «κινητήρας-όχημα», ενώ πειραματικά διενεργούνται αντίστοιχες μετρήσεις στο Εργαστήριο Εφαρμοσμένης Θερμοδυναμικής (ΕΕΘ) του ΑΠΘ. Στη συνέχεια, διερευνάται η λειτουργία του συστήματος καταλυτικής μετεπεξεργασίας υπό τις ιδιαίτερες συνθήκες λειτουργίας του κινητήρα, που επιβάλλουν μεταξύ άλλων συχνές διακοπές/επανεκκινήσεις (start/stop), καθώς και λειτουργία σε υψηλότερο φορτίο. Η διερεύνηση στηρίζεται τόσο σε πειραματικές μετρήσεις, όσο και σε αντίστοιχες προσομοιώσεις με χρήση υπολογιστικών μοντέλων που προσαρμόζονται κατάλληλα. Τελικός στόχος είναι η κεφαλαιοποίηση της εμπειρίας που προκύπτει μέσω της ανάπτυξης μιας πιστοποιημένης πλατφόρμας προσομοίωσης υπολογιστικού μοντέλου, που θα προσφέρει τη δυνατότητα βελτιστοποίησης του σχεδιασμού με την ελάχιστη δυνατή ανάγκη σε πειραματική υποστήριξη.
description: Present study is a part of antipollution technology subject for vehicles, focusing on the particularities of hybrid vehicles. The combination of internal combustion engine and electric powertrain is the reason of significant variations for the exhaust gas emissions of HEVs (temperature, mass flow rate, composition). The effects of different levels of hybridization on the exhaust gas characteristics are investigated at first. This is theoretically achieved by using suitable simulation models of “engine-vehicle” system, while the respective experimental measurements are carried out in the Laboratory of Applied Thermodynamics (LAT) of AUTh. As next, the operation of the catalytic aftertreatment is investigated under particular engine conditions, which impose particular start/stops, as well as higher load operation. This investigation is based on both experimental measurements and the corresponding simulations, utilizing the properly fitted computational models. The ultimate goal is the capitalization of the experience that will be obtained through the development of a validated simulation model platform, offering the ability of optimizing the aftertreatment design under a minimum need of experimental support.
AfriVEC: Word Embedding Models for African Languages. Case Study of Fon and Nobiin
Creators: name: Dossou, Bonaventure F. P.
name: Sabry, Mohammed
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: From Word2Vec to GloVe, word embedding models have played key roles in the current state-of-the-art results achieved in Natural Language Processing. Designed to give significant and unique vectorized representations of words and entities, those models have proven to efficiently extract similarities and establish relationships reflecting semantic and contextual meaning among words and entities. African Languages, representing more than 31% of the worldwide spoken languages, have recently been subject to lots of research. However, to the best of our knowledge, there are currently very few to none word embedding models for those languages words and entities, and none for the languages under study in this paper. After describing Glove, Word2Vec, and Poincaré embeddings functionalities, we build Word2Vec and Poincaré word embedding models for Fon and Nobiin, which show promising results. We test the applicability of transfer learning between these models as a landmark for African Languages to jointly involve in mitigating the scarcity of their resources, and attempt to provide linguistic and social interpretations of our results. Our main contribution is to arouse more interest in creating word embedding models proper to African Languages, ready for use, and that can significantly improve the performances of Natural Language Processing downstream tasks on them. The official repository and implementation is at https://github.com/bonaventuredossou/afrivec
Cahiers de lexicologie. 1977-1, n° 30
Creators: name: (:Unap)
Publisher: name: Classiques Garnier
Year: 2012
Subjects: subject: Lexique
subject: Lexicographie
subject: Sémantique
subject: Traduction
subject: Linguistique historique

description: Les Cahiers de lexicologie, revue internationale de lexicologie et de lexicographie, s'intéressent au lexique dans ses relations avec les autres composantes de la langue (syntaxe, sémantique, morphologie, phonologie, discours…), tant du point de vue théorique que de leurs applications, notamment pour ce qui concerne le traitement informatique de la langue.
description: The Cahiers de lexicologie, international review of lexicology and lexicography, studies vocabulary in its relation to other aspects of language (syntax, semantics, morphology, phonology, speech...), both from a theoretical point of view and in practical applications, notably concerning computer treatment of language.
VIMOS total transmission profiles for broad-band filters
Creators: name: Mieske, S.
name: Rejkuba, M.
name: Bagnulo, S.
name: Izzo, C.
name: Marconi, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: VIMOS is a wide-field imager and spectrograph mounted on UT3 at the VLT, whose FOV consists of four 7'x8' quadrants. Here we present the measurements of total transmission profiles -- i.e. the throughput of telescope + instrument -- for the broad band filters U, B, V, R, I, and z for each of its four quadrants. Those measurements can also be downloaded from the public VIMOS web-page. The transmission profiles are compared with previous estimates from the VIMOS consortium.
description: 5 pages, 3 figures, to appear in the proceedings of the ESO instrument calibration workshop 2007, Springer Verlag series "ESO Astrophysics Symposia", eds. F. Kerber & A. Kaufer
Cahiers de lexicologie. 1986-2, n° 49
Creators: name: (:Unap)
Publisher: name: Classiques Garnier
Year: 2012
Subjects: subject: Lexique
subject: Lexicographie
subject: Sémantique
subject: Traduction
subject: Linguistique historique

description: Les Cahiers de lexicologie, revue internationale de lexicologie et de lexicographie, s'intéressent au lexique dans ses relations avec les autres composantes de la langue (syntaxe, sémantique, morphologie, phonologie, discours…), tant du point de vue théorique que de leurs applications, notamment pour ce qui concerne le traitement informatique de la langue.
description: The Cahiers de lexicologie, international review of lexicology and lexicography, studies vocabulary in its relation to other aspects of language (syntax, semantics, morphology, phonology, speech...), both from a theoretical point of view and in practical applications, notably concerning computer treatment of language.
Stress, health and quality of life of female migrant domestic workers in Singapore: a cross-sectional study.
Creators: name: Anjara, SG
name: Nellums, LB
name: Bonetto, C
name: Van Bortel, Tine
Publisher: name: Apollo - University of Cambridge Repository
Year: 2017
Subjects: Humans
Cross-Sectional Studies
Mental Health
Quality of Life
Work Schedule Tolerance
Adult
Middle Aged
Transients and Migrants
Housekeeping
Workload
Singapore
Female
Male

description: Abstract Background: There is a global increase in migrant workers. In Singapore, there are over 230,000 migrant domestic workers (MDWs). Female MDWs may experience high levels of stress and social isolation, which may negatively impact on their health and quality of life. There have also been documented cases of abuse and exploitation. However, there is a lack of empirical research with this population. This study aimed to investigate factors impacting on the health and quality of life of female MDWs in Singapore, including socio-demographic and job related characteristics, stress, social isolation, and working management style. Methods: A cross-sectional survey was carried out with 182 female MDWs in Singapore. The survey examined health and quality of life (WHOQoL-Bréf), social connectedness (the Friendship Scale), and preferred and experienced working management style (the Theory X and Theory Y Questionnaire). Descriptive analyses were carried out in addition to ANOVA, t-tests, and chi-square tests, followed by a multivariate analysis using linear regression. Results: Participants were found to have good overall quality of life and satisfaction with health. Age and working experience were found to be significantly (p < 0.05) associated with overall quality of life and three domains (psychological, social, and environmental health). Agreement between experienced and preferred working management style was also found to be associated with higher quality of life scores (with the exception of the social relationships domain). Though women reported relatively good overall quality of life, more than half of participants reported feeling stressed. In addition, nearly 20% of participants reported being isolated or very isolated. Stress was identified to be associated with isolation. In the multivariate analysis, stress was found to contribute to worse quality of life in all domains except social relationships, after adjusting for confounders. Social connectedness was positively associated with all domains of quality of life, and agreement of working management style was positively associated with physical health, psychological health and environmental quality of life. Conclusions: The findings serve as an evidence-base pointing to the need for policies aimed at decreasing stress and social isolation among female MDWs in order to improve their health and quality of life.
title: Cahiers de lexicologie. 2008-1, n° 92
title: Synonymie et lexicographie (xvie-xxie siècles)
titleType: Subtitle
Creators: name: (:Unap)
Publisher: name: Classiques Garnier
Year: 2012
Subjects: subject: Lexique
subject: Lexicographie
subject: Sémantique
subject: Traduction
subject: Linguistique historique

description: Les Cahiers de lexicologie, revue internationale de lexicologie et de lexicographie, s'intéressent au lexique dans ses relations avec les autres composantes de la langue (syntaxe, sémantique, morphologie, phonologie, discours…), tant du point de vue théorique que de leurs applications, notamment pour ce qui concerne le traitement informatique de la langue.
description: The Cahiers de lexicologie, international review of lexicology and lexicography, studies vocabulary in its relation to other aspects of language (syntax, semantics, morphology, phonology, speech...), both from a theoretical point of view and in practical applications, notably concerning computer treatment of language.
Flat bands with band crossings enforced by symmetry representation
Creators: name: Hwang, Yoonseok
name: Rhim, Jun-Won
name: Yang, Bohm-Jung
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Flat bands have band crossing points with other dispersive bands in many systems including the canonical flat band models in the Lieb and kagome lattices. Here we show that some of such band degeneracy points are unavoidable because of the symmetry representation (SR) of the flat band under unitary symmetry. We refer to such a band degeneracy point of flat bands as a SR-enforced band crossing. SR-enforced band crossing is distinct from the conventional band degeneracy protected by symmetry eigenvalues or topological charges in that its protection requires both specific symmetry representation and band flatness of the flat band, simultaneously. Even $n$-fold rotation $C_n$ ($n=2,3,4,6$) symmetry, which cannot protect band degeneracy without additional symmetries due to its abelian nature, can protect SR-enforced band crossings in flat band systems. In two-dimensional flat band systems with $C_n$ symmetry, when the degeneracy of a SR-enforced band crossing is lifted by a $C_n$ symmetry-preserving perturbation, we obtain a nearly flat Chern band. Our theory not only explains the origin of the band crossing points of FBs existing in various models, but also gives a strict no-go theorem for isolated FBs in a given lattice arising from the SR.
description: 8+14 pages, 4+6 figures, published version
MOESM2 of Bacitracin resistance and enhanced virulence of Streptococcus suis via a novel efflux pump
Creators: name: Ma, Jiale
name: Liu, Jin
name: Zhang, Yue
name: Wang, Dan
name: Liu, Runxia
name: Liu, Guangjin
name: Yao, Huochun
name: Pan, Zihao
Publisher: name: figshare
Year: 2019
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Ecology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Additional file 2. Comparison of growth curves between wild-type CZ130302 and mutant strain CZ13-â łsstEFG.
The European Pillar of Social Rights: reaction to the consultation document
Creators: name: Fair, Just
name: Beweging.Net
Publisher: name: Zenodo
Year: 2016

description: Re-InVest: Rebuilding an inclusive, value based Europe of solidarity and trust through Social Investments’, is a H2020 funded research project operating across 19 organizations and 12 member states. It aims to strengthen the philosophical as well as the institutional and empirical underpinnings of the Social Investment Package from the perspective of human rights and (individual and collective) capabilities.

Our consortium is embedded in the network ‘Alliances to Fight Poverty’. Our research methodology actively involves European citizens severely affected by the crisis in the co-construction of knowledge and the design of a more European social agenda. This contribution to the EPSR consultation reflects our theoretical understanding of how investing in human rights, as well as individual and collective capabilities can build strong institutional capacity to repair damage and restore a social Europe.

The RE-InVEST team welcomes the initiative of the European Commission of the European Pillar of Social rights (EPSR) as a timely intervention which brings fresh hope and a momentum to break a climate of socially harmful austerity policies. Moreover, the emphasis on human rights creates an opportunity to respond to increasing discontent among an important part of the European population.

However, for the EPSR Communication to become a strong social compass and not to read, as many policy papers do, as a series of ambiguous compromises, EPSR needs to include clearer and enforceable options.

In this policy brief, rather than respond in depth to the questions elaborated in the EPSR, the RE-InVEST consortium choses to elaborate core human rights principles. Making these the touchstone of the EPSR consultation allows us share RE-InVEST’s analysis as part of our co-construction of knowledge on human rights and capabilities, an analysis developed with Just Fair1, co-author of this policy brief and a partner of the broader Alliances to Fight Poverty network, in which the RE-InVEST Consortium is embedded. We also focus on recommendations for effective implementation of the ESPR and see implementation and enforcement as a vital success factor for the EPSR as a response to the public discontent and distrust in Europe.

Given the preliminary stage of the first scientific results of the RE-InVEST project, we look forward to publishing policy recommendations related to the labour market, social protection and social services at a later stage.
Searches for Ultra-Compact Dwarf Galaxies in Galaxy Groups
Creators: name: Evstigneeva, E. A.
name: Drinkwater, M. J.
name: Jurek, R.
name: Firth, P.
name: Jones, J. B.
name: Gregg, M. D.
name: Phillipps, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a search for ultra-compact dwarf galaxies (UCDs) in six different galaxy groups: Dorado, NGC1400, NGC0681, NGC4038, NGC4697 and NGC5084. We searched in the apparent magnitude range 17.5 < b_j < 20.5 (except NGC5084: 19.2 < b_j < 21.0). We found 1 definite plus 2 possible UCD candidates in the Dorado group and 2 possible UCD candidates in the NGC1400 group. No UCDs were found in the other groups. We compared these results with predicted luminosities of UCDs in the groups according to the hypothesis that UCDs are globular clusters formed in galaxies. The theoretical predictions broadly agree with the observational results, but deeper surveys are needed to fully test the predictions.
description: 8 pages, 2 figures, accepted for publication in MNRAS
Time crystals made of electron-positron pairs
Creators: name: Bialynicki-Birula, Iwo
name: Bialynicka-Birula, Zofia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is shown that in the greatly simplified model of the mutually interacting electron-positron pairs and the electric field time-crystal structures can spontaneously form. For a special choice of parameters we find a periodic modulation of the pair number and the electric field.
description: Several improvements and corrections introduced
The First Detailed Abundances for M giants in the inner Bulge from Infrared Spectroscopy
Creators: name: Rich, R. Michael
name: Origlia, Livia
name: Valenti, Elena
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the first abundance analysis of 17 M giant stars in the inner Galactic bulge at $(l,b)=(0°,-1°)$, based on $R=25,000$ infrared spectroscopy $(1.5-1.8 ~μ\rm m)$ using NIRSPEC at the Keck telescope. Based on their luminosities and radial velocities, we identify these stars with a stellar population older than 1 Gyr. We find the iron abundance $\rm < [Fe/H] > = -0.22 \pm 0.03$, with a $1σ$ dispersion of $0.14\pm 0.024$. We also find the bulge stars have enhanced [$\rm alpha$/Fe] abundance ratio at the level of +0.3 dex relative to the Solar stars, and low $\rm \approx 6.5\pm 0.3$. The derived iron abundance and composition for this inner bulge sample is indistinguishable from that of a sample of M giants our team has previously studied in Baade's Window $(l,b)=(0.9,-4)$. We find no evidence of any major iron abundance or abundance ratio gradient between this inner field and Baade's window.
description: Accpeted for publication in the Astrophysical Journal Letters
Σχεδιασμός και βελτιστοποίηση οδοστρωμάτων από σκυρόδεμα σε δασικές και ορεινές περιοχές
Creators: name: Αναστασίου, Γεώργιος Κλ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Δύσκαμπτο οδόστρωμα
Δασικοί δρόμοι
Σκυρόδεμα
Rigid pavements
Forest roads
Concrete

description: Αντικείμενο έρευνας της διατριβής είναι ο σχεδιασμός και η βελτιστοποίηση των δύσκαμπτων οδοστρωμάτων από σκυρόδεμα για δασικούς και ορεινούς δρόμους ώστε να παρέχουν καλές κυκλοφοριακές συνθήκες, έχοντας την απαραίτητη φέρουσα ικανότητα και αντοχή στο χρόνο με το χαμηλότερο δυνατό κόστος κατασκευής και συντήρησης. Το κύριο υλικό που χρησιμοποιείται στην κατασκευή δύσκαμπτων οδοστρωμάτων είναι το σκυρόδεμα. H παρούσα έρευνα επικεντρώνεται στον τρόπο εφαρμογής, τις διαστάσεις και τις ιδιότητες που απαιτείται να έχει το σκυρόδεμα για να αποδώσει το κατάλληλο οδόστρωμα για δασικές και ορεινές οδούς στην Ήπειρο και κατ’ επέκταση και στους υπόλοιπους δασικούς δρόμους της Ελλάδας. Η διαχείριση κατασκευής δασικού δύσκαμπτου οδοστρώματος (Forest Rigid Pavement Management System - FRPMS) που προκύπτει από την παρούσα έρευνα οδηγεί στην βελτιστοποίηση αυτών των οδοστρωμάτων για χρήση σε δασικές και ορεινές περιοχές.
description: The scope of this thesis is to investigate the design and properties of rigid concrete pavements for forest and mountainous areas of Greece. Rigid pavements at forest roads must provide adequate bearing capacity, long service life and good traffic conditions, with the minimum construction and maintenance cost. The area of research is Epirus, at Northwestern Greece, which is characterized as a steep, mountainous landscape, covered by forests to a great extent. The entire research leads to a Forest Rigid Pavement Management System – FRPMS. In Greece, forest mountainous roads are mainly being designed by forest engineers under the supervision and approval of the local forest service. Rigid pavement design for the average forest road in Epirus has been determined in this research, although by following the FRPMS it is possible to design optimal rigid concrete pavements for any forest and mountainous areas of Greece.
The effect of beam oscillation rate on Al evaporation behavior in the electron beam melting process
Creators: name: Nakamura, Hideo
Publisher: name: University of British Columbia
Year: 2010

description: Electron beam hearth melting process is widely used in producing superalloys, Ti and its alloys because of its excellent metallurgical characteristics. However, one of the disadvantages of the process is that alloying elements with high vapor pressure evaporate under the highly reduced operating pressure. This makes it very difficult to carry out an accurate chemical composition control. In order to prevent the excess evaporative loss by reducing the superheating of the molten pool, the beam scanning technique is employed in normal operation. Although the effect of this technique is well known empirically, few fundamental studies' have been made to date. The purpose of this study is, therefore, to clarify the quantitative effect of the beam oscillation rate on the evaporation behavior. Small amounts of Ti-6Al-4V alloy were melted in an EB melting furnace. The temperature on the melt surface was measured in situ by an optical pyrometer during the melting period. The evaporation loss of both Ti and Al was also investigated. On the basis of the experimental results, a two dimensional unsteady heat and mass transfer model was developed. (A one dimensional model was developed in the case of a stationary beam.) The model was used to investigate the effect of the beam oscillation rate on the evaporation behavior and also to discuss the optimum beam scanning rate. It was clearly shown that the evaporative loss of both Ti and Al could be suppressed by the increase of the beam oscillation rate. With the beam oscillation rate at more than 1.0 Hz, however, this effect could not be observed clearly anymore. It was also found that the beam scanning technique is useful not only in controlling Al concentration, wt%Al, but also in suppressing the total evaporative loss of both Ti and Al.
Deep Online Correction for Monocular Visual Odometry
Creators: name: Zhang, Jiaxin
name: Sui, Wei
name: Wang, Xinggang
name: Meng, Wenming
name: Zhu, Hongmei
name: Zhang, Qian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: In this work, we propose a novel deep online correction (DOC) framework for monocular visual odometry. The whole pipeline has two stages: First, depth maps and initial poses are obtained from convolutional neural networks (CNNs) trained in self-supervised manners. Second, the poses predicted by CNNs are further improved by minimizing photometric errors via gradient updates of poses during inference phases. The benefits of our proposed method are twofold: 1) Different from online-learning methods, DOC does not need to calculate gradient propagation for parameters of CNNs. Thus, it saves more computation resources during inference phases. 2) Unlike hybrid methods that combine CNNs with traditional methods, DOC fully relies on deep learning (DL) frameworks. Though without complex back-end optimization modules, our method achieves outstanding performance with relative transform error (RTE) = 2.0% on KITTI Odometry benchmark for Seq. 09, which outperforms traditional monocular VO frameworks and is comparable to hybrid methods.
description: Accepted at 2021 IEEE International Conference on Robotics and Automation (ICRA)
Van der Waals interaction between a microparticle and a single-wall carbon nanotube
Creators: name: Blagov, E. V.
name: Klimchitskaya, G. L.
name: Mostepanenko, V. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Lifshitz-type formulas describing the free energy and the force of the van der Waals interaction between an atom (molecule) and a single-wall carbon nanotube are obtained. The single-wall nanotube is considered as a cylindrical sheet carrying a two-dimensional free electron gas with appropriate boundary conditions on the electromagnetic field. The obtained formulas are used to calculate the van der Waals free energy and force between a hydrogen atom (molecule) and single-wall carbon nanotubes of different radia. Comparison studies of the van der Waals interaction of hydrogen atoms with single- and multi-wall carbon nanotubes show that depending on atom-nanotube separation distance the idealization of graphite dielectric permittivity is already applicable to nanotubes with only two or three walls.
description: 16 pages, 5 figures, to appear in Physical Review B
The impact of social disinvestment on vulnerable groups during the crisis in Europe
Creators: name: Nicaise, I.
Publisher: name: Zenodo
Year: 2017

description: RE‐InVEST is an ongoing Horizon 2020 research project, in which academic researchers, civil society organisations and vulnerable people at grassroots level from 12 European countries jointly reflect on the foundations of a social investment strategy for a more inclusive Europe. In the first stage of the research, 13 local groups (NEETs, mental health care users, migrants, disabled people, homeless people, families at risk of eviction) analysed how the crisis of 2008‐2013 affected their capabilities and human rights, as well as their relations with society at large. This ‘merging of academic, professional and experiential knowledge’ resulted in a unique and incisive account of the devastating effects of austerity policies on vulnerable groups in Europe.

The economic impact of the crisis was obviously very different across Europe, with countries such as Austria and Switzerland experiencing a far lower impact than Portugal, Latvia or Romania in terms of unemployment, poverty and austerity measures. Nevertheless, vulnerable groups in all study countries experienced severe damage through various mechanisms: labour market effects and related income losses (unemployment, wage decreases, forced migration, precarious and unprotected work and weaker unemployment protection), housing market effects (evictions, homelessness, increased rents), financial exclusion (over‐indebtedness, no access to credit) and government measures (tax increases, ‘social disinvestment’ through increased prices or cutbacks in public services, austerity measures in social protection). These mechanisms affected the basic rights and capabilities of vulnerable groups in quite dramatic, long-lasting and often almost irreversible ways (school dropout, health damage, disrupted family ties, social isolation, etc.). Above all, our vulnerable research partners experienced severe psycho‐social distress, due to a ‘social climate change’. The effects reach beyond the individual level and undermine the collective agency of local communities, civil society organisations, cities and public services. Overall, vulnerable people experience a generalised increase in individualism, social distrust and stigma, and a weakening of social rights as public services are getting overburdened and adopt more controlling and punitive ways of treating their clients.

The research findings provide concrete suggestions for the implementation of the European Pillar of Social Rights, combining a social investment agenda with legal measures to strengthen of the principle of non-regression in the protection of basic social rights.
High transmission in twisted bilayer graphene with angle disorder
Creators: name: Sainz-Cruz, Héctor
name: Cea, Tommaso
name: Pantaleón, Pierre A.
name: Guinea, Francisco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Angle disorder is an intrinsic feature of twisted bilayer graphene and other moiré materials. Here, we discuss electron transport in twisted bilayer graphene in the presence of angle disorder. We compute the local density of states and the Landauer-Büttiker transmission through an angle disorder barrier of width comparable to the moiré period, using a decimation technique based on a real space description. We find that barriers which separate regions where the width of the bands differ by 50% or more lead to a minor suppression of the transmission, and that the transmission is close to one for normal incidence, which is reminiscent of Klein tunneling. These results suggest that transport in twisted bilayer graphene is weakly affected by twist angle disorder.
description: 5 pages, 4 figures and supplementary material
The role of the Interstellar Medium in Galaxy Formation Simulations
Creators: name: Bryan, Greg L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There is a strong connection between the formation of a disk galaxy and the properties of the interstellar medium (ISM). Theoretical work has typically either focused on the cosmological buildup of a galaxy with a relatively crude model for the gas physics, or examined local processes in the ISM and ignored the global evolution of the galaxy itself. Here, I briefly review what has been learned from both of these approaches, and what can be done to bridge the gap between them. I argue that cosmological simulations need to learn from observational and theoretical work on local ISM properties and adopt more sophisticated models for the processes that they cannot resolve. Since the ISM is still incompletely understood, there are a number of reasonable approaches for these "subgrid" models, and I will discuss the strengths and limitations of each.
description: 10 pages, 4 figures, appeared in the proceedings of the CRAL-Conference Series I "Chemodynamics: from first stars to local galaxies", Lyon 10-14 July 2006, France, Eds. Emsellem, Wozniak, Massacrier, Gonzalez, Devriendt, Champavert, EAS Publications Series
Dispersal and organization of polarized cells: non-linear diffusion and cluster formation without adhesion
Creators: name: Nakamura, G.
name: Badoual, M.
name: Fabiani, E.
name: Deroulers, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Experimental studies of cell motility in culture have shown that under adequate conditions these living organisms possess the ability to organize themselves into complex structures. Such structures may exhibit a synergy that greatly increases their survival rate and facilitate growth or spreading to different tissues. These properties are even more significant for cancer cells and related pathologies. Theoretical studies supported by experimental evidence have also shown that adhesion plays a significant role in cellular organization. Here we show that the directional persistence observed in polarized displacements permits the formation of stable cell aggregates in the absence of adhesion, even in low-density regimes. We introduce a discrete stochastic model for the dispersal of polarized cells with exclusion and derive the hydrodynamic limit. We demonstrate that the persistence coupled with the cell-cell exclusion hinders the cellular motility around other cells, leading to a non-linear diffusion which facilitates their capture into larger aggregates.
Relativistic corrections for two- and three-body flux tube model
Creators: name: Buisseret, F.
name: Semay, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We generalize the relativistic flux tube model for arbitrary two- or three-body systems. The spin-independent and spin-dependent contributions of the flux tube to the total Hamiltonian are computed in perturbation. In particular, we show that the spin-dependent part exhibits a universal spin-orbit form: It does not depend on the nature of the confined particles. The general equations we present, being well-defined for light particles, can thus be applied to usual as well as exotic hadrons such as hybrid mesons and glueballs.
description: 10 pages; v2 accepted for publication (minor changes)
Linear integral equations and two-dimensional Toda systems
Creators: name: Yin, Yue
name: Fu, Wei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The direct linearisation framework is presented for the two-dimensional Toda equations associated with the infinite-dimensional Lie algebras $A_\infty$, $B_\infty$ and $C_\infty$, as well as the Kac--Moody algebras $A_{r}^{(1)}$, $A_{2r}^{(2)}$, $C_{r}^{(1)}$ and $D_{r+1}^{(2)}$ for arbitrary integers $r\in\mathbb{Z}^+$, from the aspect of a set of linear integral equations in a certain form. Such a scheme not only provides a unified perspective to understand the underlying integrability structure, but also induces the direct linearising type solution potentially leading to the universal solution space, for each class of the two-dimensional Toda system. As particular applications of this framework to the two-dimensional Toda lattices, we rediscover the Lax pairs and the adjoint Lax pairs and simultaneously construct the generalised Cauchy matrix solutions.
description: 26 pages
MOESM3 of Bacitracin resistance and enhanced virulence of Streptococcus suis via a novel efflux pump
Creators: name: Ma, Jiale
name: Liu, Jin
name: Zhang, Yue
name: Wang, Dan
name: Liu, Runxia
name: Liu, Guangjin
name: Yao, Huochun
name: Pan, Zihao
Publisher: name: figshare
Year: 2019
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Additional file 3. Genes involved in bacitracin transport.
On the triplet vertex algebra W(p)
Creators: name: Adamovic, Drazen
name: Milas, Antun
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Algebra (math.QA)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We study the triplet vertex operator algebra $\mathcal{W}(p)$ of central charge $1-\frac{6(p-1)^2}{p}$, $p \geq 2$. We show that $\trip$ is $C_2$-cofinite but irrational since it admits indecomposable and logarithmic modules. Furthermore, we prove that $\trip$ is of finite-representation type and we provide an explicit construction and classification of all irreducible $\mathcal{W}(p)$-modules and describe block decomposition of the category of ordinary $\trip$-modules. All this is done through an extensive use of Zhu's associative algebra together with explicit methods based on vertex operators and the theory of automorphic forms. Moreover, we obtain an upper bound for ${\rm dim}(A(\mathcal{W}(p)))$. Finally, for $p$ prime, we completely describe the structure of $A(\trip)$. The methods of this paper are easily extendable to other $\mathcal{W}$-algebras and superalgebras.
description: 32 pages; v2: a few minor changes, to appear in Advances in Mathematics
Is the Chiral Magnetic Effect fast enough?
Creators: name: Ghosh, Jewel K.
name: Grieninger, Sebastian
name: Landsteiner, Karl
name: Morales-Tejera, Sergio
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: It depends: While we find within holography that the lifetime of the magnetic field for collider energies like the ones achieved at RHIC is long enough to build up the chiral magnetic current, the lifetime of the magnetic field at LHC seems to be too short. We study the real time evolution of the chiral magnetic effect out-of-equilibrium in strongly coupled holographic gauge theories. We consider the backreaction of the magnetic field onto the geometry and monitor pressure and chiral magnetic current. Our findings show that generically at small magnetic field the pressure builds up faster than the chiral magnetic current whereas at strong magnetic field the opposite is true. At large charge we also find that equilibration is delayed significantly due to long lived oscillations. We also match the parameters of our model to QCD parameters and draw lessons of possible relevance to the realization of the chiral magnetic effect in heavy ion collisions. In particular, we find an equilibration time of about $\sim0.35$ fm/c in presence of the chiral anomaly for plasma temperatures of order $T\sim300-400$ MeV.
description: v2 matches version published in PRD; 11 pages + appendix, 9 + 3 figures
The No-Broadcasting Theorem and its Classical Counterpart
Creators: name: Kalev, A.
name: Hen, I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Although it is widely accepted that `no-broadcasting' -- the nonclonability of quantum information -- is a fundamental principle of quantum mechanics, an impossibility theorem for the broadcasting of general density matrices has not yet been formulated. In this paper, we present a general proof for the no-broadcasting theorem, which applies to arbitrary density matrices. The proof relies on entropic considerations, and as such can also be directly linked to its classical counterpart, which applies to probabilistic distributions of statistical ensembles.
description: 4 pages
Searching for chemical abundance variations in young star clusters in the Magellanic Clouds: NGC 411, NGC 1718 and NGC 2213
Creators: name: Kapse, Shalmalee
name: de Grijs, Richard
name: Zucker, Daniel B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The conventional picture of coeval, chemically homogeneous, populous star clusters -- known as `simple stellar populations' (SSPs) -- is a view of the past. Photometric and spectroscopic studies reveal that almost all ancient globular clusters in the Milky Way and our neighbouring galaxies exhibit star-to-star light-element abundance variations, typically known as 'multiple populations' (MPs). Here, we analyse photometric $\it Hubble$ $\it Space$ $\it Telescope$ observations of three young ($
description: 11 pages, 5 Figures
Muon and electron g-2 and proton and cesium weak charges implications on dark $\mathbf{Z_d}$ models
Creators: name: Cadeddu, M.
name: Cargioli, N.
name: Dordei, F.
name: Giunti, C.
name: Picciau, E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Theories beyond the standard model involving a sub-GeV-scale vector $Z_d$ mediator have been largely studied as a possible explanation of the experimental values of the muon and electron anomalous magnetic moments. Motivated by the recent determination of the anomalous muon magnetic moment performed at Fermilab, we derive the constraints on such a model obtained from the magnetic moment determinations and the measurements of the proton and cesium weak charge, $Q_W$, performed at low-energy transfer. In order to do so, we revisit the determination of the cesium $Q_W$ from the atomic parity violation experiment, which depends critically on the value of the average neutron rms radius of $^{133}\text{Cs}$, by determining the latter from a practically model-independent extrapolation from the recent average neutron rms radius of $^{208}\text{Pb}$ performed by the PREX-2 Collaboration. From a combined fit of all the aforementioned experimental results, we obtain rather precise limits on the mass and the kinetic mixing parameter of the $Z_d$ boson, namely $m_{Z_d} = 47{}^{+61}_{-16} \, \mathrm{MeV}$ and $\varepsilon = 2.3{}^{+1.1}_{-0.4} \times 10^{-3}$, when marginalizing over the $Z-Z_d$ mass mixing parameter $δ$.
description: 6 pages, 5 figures. Matches version published in Physical Review D Letter