cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Une étude comparative des discours sur le Covid-19 en Côte d'Ivoire et au Cameroun beaucoup de peur et de questionnement
Creators: name: Drescher, Martina
name: Boukari, Oumarou
name: Ngawa Mbaho, Carline Liliane
Publisher: name: University of Bayreuth
Year: 2022
Subjects: subject: COVID-19
subject: moral discourse
subject: health discourse
subject: pandemic
subject: vaccine
subject: Côte d'Ivoire Cameroon
subject: 370
subject: 380
subject: 440
subject: 610

description: This paper presents the first results of a research project that focuses on the moral dimension of health discourse. With the emergence of Covid-19 in early 2020, we focused on the communication accompanying the evolution of the pandemic in two French-speaking African countries: Cameroon and Côte d'Ivoire. Based on data consisting of interviews, focus group discussions and media discourses collected on site between May and November 2020, our article studies the imaginary of the new disease from its discursive construction. It is based on the hypothesis that, firstly, the discourse on Covid-19 is grafted onto an imaginary that already exists in the collective consciousness by reactivating elements of a previous epi- or pandemic discourse and, secondly, that this discourse has a strong moral content. We focused on the issue of vaccines, which were still in the development phase at the time, as they were at the centre of many controversies and often provoked highly moral reactions. Using a pragmatic-discursive approach that employs qualitative analyses, we examined how Ivorians and Cameroonians position themselves in relation to what is right and wrong and how they make moral judgements about the actions and behaviour of others. This pilot study shows that the discursive practices observed in the different formats collected in the two countries are very similar. Moreover, the cross-sectional views on Côte d'Ivoire and Cameroon, as well as the comparison with other pandemic discourses, enhance both a relational and multiple perspective while contributing to the question of how Africa lives and perceives this health crisis triggered by the outbreak of the coronavirus.
Kottler Spacetime in Isotropic Static Coordinates
Creators: name: Solanki, R
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Kottler spacetime in isotropic coordinates is known where the metric is time-dependent. In this paper, the Kottler spacetime is given in isotropic static coordinates (i.e., the metric components are time-independent). The metric is found in terms of the Jacobian elliptic functions through coordinate transformations from the Schwarzschild-(anti-)de Sitter metric. In canonical coordinates, it is known that the unparameterized spatially projected null geodesics of the Kottler and Schwarzschild spacetimes coincide. We show that in isotropic static coordinates, the refractive indices of Kottler and Schwarzschild are not proportional, yielding spatially projected null geodesics that are different.
description: 17 pages, 2 figures; a section on parameterization, two appendices and six footnotes added, four typos corrected
Ανάλυση του επαγόμενου μαγνητικού πεδίου σε συνεισφορές φυσικά εντοπισμένων μοριακών τροχιακών
Creators: name: Λίγγας, Ραφαήλ Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Αρωματικότητα
Επαγόμενο Μαγνητικό Πεδίο
Μοριακά Τροχιακά
Aromaticity
Induced Magnetic Field
Molecular Orbitals

description: Στη παρούσα εργασία παρουσιάζεται η ανάπτυξη και η εφαρμογή της μεθοδολογίας ανάλυσης του επαγόμενου μαγνητικού πεδίου φυσικών εντοπισμένων μοριακών τροχιακών (NLMO-IMF) σε κυρτούς πολυκυκλικούς υδρογρονάνθρακες με πολλαπλά ολικά και τοπικά ομόκεντρα ρεύματα δακτυλίων. Συγκεκριμένα, τα μόρια που μελετήθηκαν είναι το κορονένιο, το κοραννουλένιο, το αλτάν-κοραννουλένιο, το πεντα-βενζο-κοραννουλένιο και το πεντα-ιντενο-κοραννουλένιο. Αναπτύχθηκε λογισμικό που επεξεργάζεται τα αρχεία εξόδου του λογισμικού Amsterdam Density Functional (ADF) και παράγει αρχεία cubes των συνεισφορών του διαχωρισμένου επαγόμενου μαγνητικού πεδίου. Με τη μεθοδολογία NLMO-IMF επιτεύχθηκε αξιόπιστος διαχωρισμός του π και σ συστήματος σε κυρτά μόρια και αναλύθηκε το ολικό μαγνητικό πεδίο σε συνεισφορές συγκεκριμένων ρευμάτων δακτυλίου.
description: The present paper presents the development and application of the methodology of analysis of the induced magnetic field of natural localized molecular orbitals (NLMO-IMF) in bowl-shaped polycyclic hydrocarbons with many global and local concentric ring currents. Specifically, the molecules that were studied are coronene, corannulene, altan-corannulene, penta-benzo-corannulene and penta-indeno-corannulene. Software was developed that processes the output files of the Amsterdam Density Functional (ADF) that produces cube files of the contributions of the separated induced magnetic field. With the NLMO-IMF methodology a reliable separation of the π and σ system in bowl-shaped molecules was achieved and the total magnetic field was analyzed in contributions of specific ring currents.
On factors of independent transversals in $k$-partite graphs
Creators: name: Yuster, Raphael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C35, 05C69

description: A $[k,n,1]$-graph is a $k$-partite graph with parts of order $n$ such that the bipartite graph induced by any pair of parts is a matching. An independent transversal in such a graph is an independent set that intersects each part in a single vertex. A factor of independent transversals is a set of $n$ pairwise-disjoint independent transversals. Let $f(k)$ be the smallest integer $n_0$ such that every $[k,n,1]$-graph has a factor of independent transversals assuming $n \ge n_0$. Several known conjectures imply that for $k \ge 2$, $f(k)=k$ if $k$ is even and $f(k)=k+1$ if $k$ is odd. While a simple greedy algorithm based on iterating Hall's Theorem shows that $f(k) \le 2k-2$, no better bound is known and in fact, there are instances showing that the bound $2k-2$ is tight for the greedy algorithm. Here we significantly improve upon the greedy algorithm bound and prove that $f(k) \le 1.78k$ for all $k$ sufficiently large, answering a question of MacKeigan.
description: Final version with added reference
Is the dependence of spectral index on luminosity real in optically selected AGN samples?
Creators: name: Tang, Sumin
name: Zhang, Shuang Nan
name: Hopkins, Philip F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We critically examine the dependence of spectral index on luminosity in optically selected AGN samples. An analysis of optically selected high-redshift quasars showed an anti-correlation of $α_{OX}$, the spectral index between the rest-frame 2500 A and 2 keV, with optical luminosity (Miyaji et al. 2006). We examine this relationship by means of Monte Carlo simulations and conclude that a constant spectral index independent of optical luminosity is still consistent with this high-z sample. We further find that that contributions of large dispersions and narrow range of optical luminosity are most important for the apparent, yet artificial, $α_{OX} - l_o$ correlation reported. We also examine another, but more complete low-z optical selected AGN sub-sample from Steffen et al. (2006), and our analysis shows that a constant spectral index independent of optical luminosity is also consistent with the data. By comparing X-ray and optical luminosity functions, we find that a luminosity independent spectral index is in fact more preferred than the luminosity dependent spectral index model. We also discuss the selection effects caused by flux limits, which might systematically bias the $l_x - l_o$ relation and cause discrepancy in optically selected and X-ray selected AGN samples. To correctly establish a dependence of spectral index of AGNs on their luminosity, a larger and more complete sample is needed and consequences of luminosity dispersions and selection effects in flux limited samples must be taken into account properly.
description: 10 pages, 11 figures, accepted for publication in MNRAS
A functional task analysis and motion simulation for the development of a powered upper-limb orthosis
Creators: name: Anglin, Carolyn
Publisher: name: University of British Columbia
Year: 2008

description: The objective of this thesis is to determine an optimal configuration of a powered upper-limborthosis. The criterion is to minimize the complexity, defined as the number of degrees of freedom of the orthosis, while maintaining the ability to perform specific tasks. This goal was realized in three stages of research. In the first stage, potential users were interviewed to determine their task priorities. In the second stage, the natural arm motions of able-bodied individuals performing the tasks identified as high priority were profiled with a video trackingsystem. Finally, a kinematic simulation algorithm was developed to evaluate whether a given orthosis configuration is able to perform the identified high-priority tasks. It was found that the task functionality was overly compromised for any configuration with less than five degrees of freedom. Two different configurations with five degrees of freedom are recommended. The recommendations are: (1) to power all but the motions of elevation and wrist yaw, or (2) to power all but wrist flexion and wrist yaw.
Spin liquid and ferroelectricity close to a quantum critical point in PbCuTe$_2$O$_6$
Creators: name: Thurn, Christian
name: Eibisch, Paul
name: Ata, Arif
name: Winkler, Maximilian
name: Lunkenheimer, Peter
name: Kézsmárki, István
name: Tutsch, Ulrich
name: Saito, Yohei
name: Hartmann, Steffi
name: Zimmermann, Jan
name: Hanna, Abanoub R. N.
name: Islam, A. T. M. Nazmul
name: Chillal, Shravani
name: Lake, Bella
name: Wolf, Bernd
name: Lang, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Geometrical frustration among interacting spins combined with strong quantum fluctuations destabilize long-range magnetic order in favour of more exotic states such as spin liquids. By following this guiding principle, a number of spin liquid candidate systems were identified in quasi-two-dimensional (quasi-2D) systems. For 3D, however, the situation is less favourable as quantum fluctuations are reduced and competing states become more relevant. Here we report a comprehensive study of thermodynamic, magnetic and dielectric properties on single crystalline and pressed-powder samples of PbCuTe$_2$O$_6$, a candidate material for a 3D frustrated quantum spin liquid featuring a hyperkagome lattice. Whereas the low-temperature properties of the powder samples are consistent with the recently proposed quantum spin liquid state, an even more exotic behaviour is revealed for the single crystals. These crystals show ferroelectric order at $T_{\text{FE}} \approx 1\,\text{K}$, accompanied by strong lattice distortions, and a modified magnetic response -- still consistent with a quantum spin liquid -- but with clear indications for quantum critical behaviour.
description: 59 pages, 15 figures, This version of the article has been accepted for publication, after peer review but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online
Neutrino Masses from Cosmological Probes in Interacting Neutrino Dark-Energy Models
Creators: name: Ichiki, Kiyotomo
name: Keum, Yong-Yeon
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate whether interaction between massive neutrinos and quintessence scalar field is the origin of the late time accelerated expansion of the universe. We present explicit formulas of the cosmological linear perturbation theory in the neutrinos probes of dark-energy model, and calculate cosmic microwave background anisotropies and matter power spectra. In these models, the evolution of the mass of neutrinos is determined by the quintessence scalar field, which is responsible for a varying effective equation of states: $ω_{eff}(z)$ goes down -1. We consider several types of scalar field potential and put constraints on the coupling parameter between neutrinos and dark energy. By combining data from cosmic microwave background (CMB) experiments including the WMAP 3-year results, large scale structure with 2dFGRS data sets, we constrain the hypothesis of massive neutrinos in the mass-varying neutrino scenario. Assuming the flatness of the universe, the constraint we can derive from the current observation is $\sum m_ν < 0.45$ eV at 1$σ$ (0.87 eV at 2$σ$) confidence level for the sum over three species of neutrinos. The dynamics of scalar field and the impact of scalar field perturbations on cosmic microwave background anisotropies are discussed. We also discuss on the instability issue of the our model and confirm that neutrinos are stable against the density fluctuation.
description: Latex, 34 pages, 11 figures, final version to appear in JHEP
The generalized Klein-Gordon oscillator with position-dependent mass in a particular Gödel-type space-time
Creators: name: Yang, Yi
name: Long, Zheng-Wen
name: Ran, Qi-Kang
name: Chen, Hao
name: Zhao, Zi-Long
name: Long, Chao-Yun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The relativistic quantum dynamics of the generalized Klein-Gordon (KG) oscillator having position-dependent mass in the Gödel-type space-time is investigated. We have presented the generalized KG oscillator in this space-time, and discussed the effect of Cornell potential and linear potential for our considered system. The modification from the parameters of position-dependent mass and characterizing the space-time for the energy spectrums are presented.
description: 11 pages
Complementary information about the poster: Effortless Counting of Sorted Culicoides from Light-Traps
Creators: name: Tejerina-Lardeux, Rosenka
name: Lardeux, Frederic
name: Rakotoarivany, Ignace
name: Garros, Claire
Publisher: name: E-Sove 2024
Year: 2024

description: The PDF file contains complementary information to the poster presented at the XXIIIrd European Society for Vector Ecology Conference (ESOVE) in Montpellier, France, from October 14–17, 2024
3D Relativistic MHD Simulations of Magnetized Spine-Sheath Relativistic Jets
Creators: name: Mizuno, Y.
name: Hardee, P.
name: Nishikawa, K. -I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have performed numerical simulations of weakly and strongly magnetized relativistic jets embedded in a weakly and strongly magnetized stationary or mildly relativistic (0.5c) sheath using the RAISHIN code. In the numerical simulations a jet with Lorentz factor γ=2.5 is precessed to break the initial equilibrium configuration. Results of the numerical simulations are compared to theoretical predictions from a normal mode analysis of the linearized RMHD equations describing a uniform axially magnetized cylindrical relativistic jet embedded in a uniform axially magnetized moving sheath. The prediction of increased stability of a weakly-magnetized system with mildly relativistic sheath flow to Kelvin-Helmholtz instabilities and the stabilization of a strongly-magnetized system with mildly relativistic sheath flow is confirmed by the numerical simulations.
description: 5 pages, 2 figures, to appear in the Proceedings of the VI Microquasar Workshop: "Microquasars and Beyond", Como, Italy, September 2006
A conditional, a fuzzy and a probabilistic interpretation of self-organising maps
Creators: name: Giordano, Laura
name: Gliozzi, Valentina
name: Dupré, Daniele Theseider
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: I.2.4

description: In this paper we establish a link between fuzzy and preferential semantics for description logics and Self-Organising Maps, which have been proposed as possible candidates to explain the psychological mechanisms underlying category generalisation. In particular, we show that the input/output behavior of a Self-Organising Map after training can be described by a fuzzy description logic interpretation as well as by a preferential interpretation, based on a concept-wise multipreference semantics, which takes into account preferences with respect to different concepts and has been recently proposed for ranked and for weighted defeasible description logics. Properties of the network can be proven by model checking on the fuzzy or on the preferential interpretation. Starting from the fuzzy interpretation, we also provide a probabilistic account for this neural network model.
description: 31 pages, 1 figure. arXiv admin note: text overlap with arXiv:2008.13278
Elicitation of imperative and indicative morphology
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio file VP-160512-11: Elicitation of imperative versus indicative mood in verbs that do not have a contrasting weak/light vs. strong/heavy stem.
Κακώσεις του προσωπικού κρανίου σε αθλητικές δραστηριότητες : «Επιδημιολογικά δεδομένα και τρόποι πρόληψής τους»
Creators: name: Παράσχου, Βασίλειος Χαράλαμπου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Κακώσεις προσωπικού κρανίου
Αθλητικές δραστηριότητες
Επιδημιολογία
Πρόληψη
Facial injuries
Sports
Epidemiology
Prevention

description: Ένα από τα πιο ευαίσθητα και σημαντικά μέρη του ανθρωπίνου σώματος είναι το πρόσωπο. Μαζί με τα τροχαία ατυχήματα, επεισόδια ανθρώπινης βίας και τα εργατικά ατυχήματα, οι αθλητικές δραστηριότητες αποτελούν τα συνηθέστερα αίτια πρόκλησής κακώσεων του προσώπου. Οι λόγοι ποικίλλουν και σχετίζονται με την ηλικία, το φύλο, τη γεωγραφική περιοχή, την κοινωνικοοικονομική θέση και άλλους παράγοντες. Η παρούσα βιβλιογραφική ανασκόπηση παρουσιάζει επιδημιολογικά δεδομένα της τελευταίας δεκαετίας για τις κακώσεις του προσωπικού κρανίου σε αθλητικές δραστηριότητες και αποτελεσματικούς τρόπους πρόληψής τους. Κακώσεις μαλακών μορίων και κατάγματα ρινός, ζυγωματικού οστού αλλά και οδοντοφατνιακοί τραυματισμοί συνθέτουν την κατανομή των συχνότερων κρανιοπροσωπικών κακώσεων. Ο προστατευτικός εξοπλισμός, που συχνά χρησιμοποιείται πλημμελώς από τους αθλούμενους, είναι το κράνος, ο αθλητικός στοματικός νάρθηκας και τα προστατευτικά γυαλιά ή μάσκες. Η εκπαίδευση τόσο των ειδικών, που συμμετέχουν στο χώρο των αθλητικών κακώσεων, όσο και των αθλουμένων σχετικά με τις συχνότερες κακώσεις του προσωπικού κρανίου και η χρήση προστατευτικού εξοπλισμού, αποτελεί αδιαμφισβήτητα τον αποτελεσματικότερο τρόπο περιορισμού του προβλήματος.
description: Face is one of the most sensitive and important parts of human body. Along with motor vehicle accidents, human violence incidents and labor accidents, sports activities constitute the most frequent causes of facial injuries. Reasons vary and correlate with age, gender, location, socioeconomic status and other factors. This literature review presents epidemiologic data published during the last decade about facial injuries in sports activities and effective ways of prevention. Soft tissue injuries, nasal fractures, zygomatic fractures, and dentoalveolar injuries represent the most common facial injuries distribution. Protective equipment, which frequently is used inadequately by athletes, consists of helmets, sports mouth guards, and sports goggles or masks. Informing specialists taking care of athletes with facial injuries, and athletes, per se, about common facial skeleton injuries and the use of protective equipment, is unquestionably the most efficient way to prevent sports facial injuries.
Renormalized charge in a two-dimensional model of colloidal suspension from hypernetted chain approach
Creators: name: Camargo, Manuel
name: Tellez, Gabriel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The renormalized charge of a simple two-dimensional model of colloidal suspension was determined by solving the hypernetted chain approximation and Ornstein-Zernike equations. At the infinite dilution limit, the asymptotic behavior of the correlations functions is used to define the effective interactions between the components of the system and these effective interactions were compared to those derived from the Poisson-Boltzmann theory. The results we obtained show that, in contrast to the mean-field theory, the renormalized charge does not saturate, but exhibits a maximum value and then decays monotonically as the bare charge increases. The results also suggest that beyond the counterion layer near to the macroion surface, the ionic cloud is not a diffuse layer which can be handled by means of the linearized theory, as the two-state model claims, but a more complex structure is settled by the correlations between microions.
High-Specific-Power Flexible Transition Metal Dichalcogenide Solar Cells
Creators: name: Nazif, Koosha Nassiri
name: Daus, Alwin
name: Hong, Jiho
name: Lee, Nayeun
name: Vaziri, Sam
name: Kumar, Aravindh
name: Nitta, Frederick
name: Chen, Michelle
name: Kananian, Siavash
name: Islam, Raisul
name: Kim, Kwan-Ho
name: Park, Jin-Hong
name: Poon, Ada
name: Brongersma, Mark L.
name: Pop, Eric
name: Saraswat, Krishna C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Semiconducting transition metal dichalcogenides (TMDs) are promising for flexible high-specific-power photovoltaics due to their ultrahigh optical absorption coefficients, desirable band gaps and self-passivated surfaces. However, challenges such as Fermi-level pinning at the metal contact-TMD interface and the inapplicability of traditional doping schemes have prevented most TMD solar cells from exceeding 2% power conversion efficiency (PCE). In addition, fabrication on flexible substrates tends to contaminate or damage TMD interfaces, further reducing performance. Here, we address these fundamental issues by employing: 1) transparent graphene contacts to mitigate Fermi-level pinning, 2) $\rm{MoO}_\it{x}$ capping for doping, passivation and anti-reflection, and 3) a clean, non-damaging direct transfer method to realize devices on lightweight flexible polyimide substrates. These lead to record PCE of 5.1% and record specific power of $\rm{4.4\ W\,g^{-1}}$ for flexible TMD ($\rm{WSe_2}$) solar cells, the latter on par with prevailing thin-film solar technologies cadmium telluride, copper indium gallium selenide, amorphous silicon and III-Vs. We further project that TMD solar cells could achieve specific power up to $\rm{46\ W\,g^{-1}}$, creating unprecedented opportunities in a broad range of industries from aerospace to wearable and implantable electronics.
description: 39 pages; v2: some references reformatted
Determination of the resistivity anisotropy of SrRuO$_{3}$ by measuring the planar Hall effect
Creators: name: Genish, Isaschar
name: Klein, Lior
name: Reiner, James W.
name: Beasley, M. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We have measured the planar Hall effect in epitaxial thin films of the itinerant ferromagnet SrRuO3 patterned with their current paths at different angles relative to the crystallographic axes. Based on the results, we have determined that SrRuO3 exhibits small resistivity anisotropy in the entire temperature range of our measurements (between 2 to 300 K); namely, both above and below its Curie temperature (~150 K). It means that in addition to anisotropy related to magnetism, the resistivity anisotropy of SrRuO3 has an intrinsic, nonmagnetic source. We have found that the two sources of anisotropy have competing effects.
A Novel Approach to Discover Switch Behaviours in Process Mining
Creators: name: Lu, Yang
name: Chen, Qifan
name: Poon, Simon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Databases (cs.DB)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Process mining is a relatively new subject which builds a bridge between process modelling and data mining. An exclusive choice in a process model usually splits the process into different branches. However, in some processes, it is possible to switch from one branch to another. The inductive miner guarantees to return sound process models, but fails to return a precise model when there are switch behaviours between different exclusive choice branches due to the limitation of process trees. In this paper, we present a novel extension to the process tree model to support switch behaviours between different branches of the exclusive choice operator and propose a novel extension to the inductive miner to discover sound process models with switch behaviours. The proposed discovery technique utilizes the theory of a previous study to detect possible switch behaviours. We apply both artificial and publicly-available datasets to evaluate our approach. Our results show that our approach can improve the precision of discovered models by 36% while maintaining high fitness values compared to the original inductive miner.
description: ICPM Workshop 2020
title: Photochroms, Photochrom Zürich. Palästina-Bilder-Kollektion
title: Unübertroffene farbige Photographien nach Originalaufnahmen vom Jahre 1894 von Palästina und Syrien
titleType: Subtitle
title: Geschichtlich-geographische Notizen
titleType: Subtitle
Creators: name: Furrer, Konrad
Publisher: name: Art. Institut Orell Füssli
Year: 1895
Subjects: subject: 000 Informatik, Informationswissenschaft, allgemeine Werke::010 Bibliografien::017 Allgemeine Sachkataloge
subject: 700 Künste und Unterhaltung::760 Grafik::760 Grafik, Druckgrafik, Drucke
subject: 700 Künste und Unterhaltung::770 Fotografie, Computerkunst::770 Fotografie, Fotografien, Computerkunst
subject: Fotochrom
subject: Verkaufskatalog
subject: Photochrom Zürich
subject: Farblithografie
subject: Palästina
subject: Syrien (Wilāyet)

description: Katalog mit geschichtlich-geographischen Notizen, verfasst von Prof. Dr. Konrad Furrer in Zürich
Dynamics and control of a class of ground based mobile flexible manipulators
Creators: name: Ries, Thomas Charles
Publisher: name: University of British Columbia
Year: 2009

description: The thesis studies dynamics and control of a two-link flexible manipulator, free to undergo planar translational and slewing maneuvers, through numerical simulation. To begin with kinematics and kinetics of the system are investigeted, for a general N-link system undergoing planar motion, leading to the nonlinear, nonautononious and coupled equations of motion obtained using the Lagrangian procedure. A parametric study follows to assess the influence of system variables on the dynamical response and particularly on the positioning error of the payload. A joint based non-collocated algorithm, using the Feedback Linearization Technique (FLT) that accounts for the complete nonlinear dynamics of the system. is proposed for the tip control. The results are useful in the design of the ground based flexible, mobile servicing systems which are gradually appearing on the industrial scene and are likely to be more common in the future.
Baryogenesis in $f(P)$ Gravity
Creators: name: Bhattacharjee, Snehasish
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work, we investigate gravitational baryogenesis in the framework of $f(P)$ gravity to understand the applicability of this class of modified gravity in addressing the baryon asymmetry of the Universe. For the analysis, we set $f(P) = αP$ where $α$ is the model parameter. We found that in $f(P)$ gravity, the CP-violating interaction acquires a modification through the addition of the nontopological cubic term $P$ in addition to the Ricci scalar $R$ and the mathematical expression of the baryon-to-entropy ratio depends not only on the time derivative of $R$ but also the time derivative of $P$. Additionally, we also investigate the consequences of a more complete and generalized CP-violating interaction proportional to $f(P)$ instead of $P$ in addressing the baryon asymmetry of the Universe. For this type of interaction, we report that the baryon-to-entropy ratio is proportional to $\dot{R}$, $\dot{P}$ and $f^{'}(P)$. We report that for both of these cases, rational values of $α$ and $χ$ generate acceptable baryon-to-entropy ratios compatible with observations.
Proof of ultra-violet finiteness for a planar non-supersymmetric Yang-Mills theory
Creators: name: Ananth, Sudarshan
name: Kovacs, Stefano
name: Shimada, Hidehiko
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This paper focuses on a three-parameter deformation of N=4 Yang-Mills that breaks all the supersymmetry in the theory. We show that the resulting non-supersymmetric gauge theory is scale invariant, in the planar approximation, by proving that its Green functions are ultra-violet finite to all orders in light-cone perturbation theory.
description: 13 pages, 1 figure; v2: minor corrections
$m=1$ Ideal Internal Kink Modes in a Line-tied Screw Pinch
Creators: name: Huang, Yi-Min
name: Zweibel, Ellen G.
name: Sovinec, Carl R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It is well known that the radial displacement of the $m=1$ internal kink mode in a periodic screw pinch has a steep jump at the resonant surface where $\mathbf{k}\cdot\mathbf{B}=0$. In a line-tied system, relevant to solar and astrophysical plasmas, the resonant surface is no longer a valid concept. It is then of interest to see how line-tying alters the aforementioned result for a periodic system. If the line-tied kink also produces a steep gradient, corresponding to a thin current layer, it may lead to strong resistive effects even with weak dissipation. Numerical solution of the eigenmode equations shows that the fastest growing kink mode in a line-tied system still possesses a jump in the radial displacement at the location coincident with the resonant surface of the fastest growing mode in the periodic counterpart. However, line-tying thickens the inner layer and slows down the growth rate. As the system length $L$ approaches infinity, both the inner layer thickness and the growth rate approach the periodic values. In the limit of small $ε\sim B_ϕ/B_{z}$, the critical length for instability $L_{c}\simε^{-3}$. The relative increase in the inner layer thickness due to line-tying scales as $ε^{-1}(L_{c}/L)^{2.5}$.
description: To appear in Physics of Plasmas
title: Seeking the Face of God : a study on Augustine's reception in the mystical thought of Bernard of Clairvaux and William of St. Thierry
Creators: name: Cvetković, Carmen Angela
Publisher: name: University of St Andrews
publisherIdentifier: https://ror.org/02wn5qz54
publisherIdentifierScheme: ROR
Year: 2010

description: The present thesis examines the way in which two twelfth century authors, the Cistercian monks, Bernard of Clairvaux (1091-1153) and William of St. Thierry (c. 1080-1148), used Augustine (354-430) in the articulation of their mystical thought. The approach to this subject takes into account the fact that in the works of all these medieval authors the “mystical” element is inescapably entangled with their theological discourse and that an accurate understanding of their views on the soul’s direct encounter with God cannot be achieved without a discussion of their theology. This thesis posits that the cohesion of Bernard’s and William’s mystical thought lies in their appropriation of the guiding principle of Augustine’s mystical theology: “You made us for yourself and our heart is restless until it rests in you” (conf. 1.1.1), reflected in the subtle interplay of three main themes, namely (1) the creation of humanity in the image and likeness of God, which provides the grounds for the understanding of the soul’s search for direct contact with God; (2) love as a longing innate in every human being, which explores the means to attain immediacy with God; and (3) the soul’s direct encounter with God, which discusses the nature of the soul’s immediate experience of the divine presence that can only be achieved in lasting fullness at the end of time. This examination of Bernard’s and William’s use of Augustine is structured on the basis of these three core themes which form the scaffolding of their mystical thought. Investigating the specific methods of their reception of Augustine will highlight the originality and uniqueness of each of the two Cistercian authors, who while drawing on the same patristic source use it nevertheless in various ways, by focussing on different aspects of Augustine’s immense oeuvre and by arriving at distinct mystical programmes.
Angular Anisotropies in the Cosmic Gamma-ray Background as a Probe of its Origin
Creators: name: Miniati, Francesco
name: Koushiappas, Savvas M.
name: Di Matteo, Tiziana
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Notwithstanding the advent of the Gamma-ray Large Area Telescope, theoretical models predict that a significant fraction of the cosmic gamma-ray background (CGB), at the level of 20% of the currently measured value, will remain unresolved. The angular power spectrum of intensity fluctuations of the CGB contains information on its origin. We show that probing the latter from a few tens of arcmin to several degree scales, together with complementary GLAST observations of gamma-ray emission from galaxy clusters and the blazars luminosity function, can discriminate between a background that originates from unresolved blazars or cosmic rays accelerated at structure formation shocks.
description: 4 pages, 3 figures. Replaced to match version accepted for publication in Astrophys. J. Lett
Toughening elastomers via microstructured thermoplastic fibers with sacrificial bonds and hidden lengths
Creators: name: Zou, Shibo
name: Therriault, Daniel
name: Gosselin, Frédérick P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Soft materials capable of large inelastic deformation play an essential role in high-performance nacre-inspired architectured materials with a combination of stiffness, strength and toughness. The rigid "building blocks" made from glass or ceramic in these architectured materials lack inelastic deformation capabilities and thus rely on the soft interface material that bonds together these building blocks to achieve large deformation and high toughness. Here, we demonstrate the concept of achieving large inelastic deformation and high energy dissipation in soft materials by embedding microstructured thermoplastic fibers with sacrificial bonds and hidden lengths in a widely used elastomer. The microstructured fibers are fabricated by harnessing the fluid-mechanical instability of a molten polycarbonate (PC) thread on a commercial 3D printer. Polydimethylsiloxane (PDMS) resin is infiltrated around the fibers, creating a soft composite after curing. The failure mechanism and damage tolerance of the composite are analyzed through fracture tests. The high energy dissipation is found to be related to the multiple fracture events of both the sacrificial bonds and elastomer matrix. Combining the microstructured fibers and straight fibers in the elastomer composite results in a ~ 17 times increase in stiffness and a ~ 7 times increase in total energy to failure compared to the neat elastomer. Our findings in applying the sacrificial bonds and hidden lengths toughening mechanism in soft materials at the microscopic scale will facilitate the development of novel bioinspired laminated composite materials with high mechanical performance.
Enhanced Remote Astronomical Archive System Based on the File-Level Unlimited Sliding-Window Technique
Creators: name: Shi, Cong-Ming
name: Deng, Hui
name: Wang, Feng
name: Mei, Ying
name: Guo, Shao-Guang
name: Yang, Chen
name: Wu, Chen
name: Wei, Shou-Lin
name: Wicenec, Andreas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Data archiving is one of the most critical issues for modern astronomical observations. With the development of a new generation of radio telescopes, the transfer and archiving of massive remote data have become urgent problems to be solved. Herein, we present a practical and robust file-level flow-control approach, called the Unlimited Sliding-Window (USW), by referring to the classic flow-control method in TCP protocol. Basing on the USW and the Next Generation Archive System (NGAS) developed for the Murchison Widefield Array telescope, we further implemented an enhanced archive system (ENGAS) using ZeroMQ middleware. The ENGAS substantially improves the transfer performance and ensures the integrity of transferred files. In the tests, the ENGAS is approximately three to twelve times faster than the NGAS and can fully utilize the bandwidth of network links. Thus, for archiving radio observation data, the ENGAS reduces the communication time, improves the bandwidth utilization, and solves the remote synchronous archiving of data from observatories such as Mingantu spectral radioheliograph. It also provides a better reference for the future construction of the Square Kilometer Array (SKA) Science Regional Center.
description: 11 pages, 10 figures
Deep Learning-Aided OFDM-Based Generalized Optical Quadrature Spatial Modulation
Creators: name: Chen, Chen
name: Zeng, Lin
name: Zhong, Xin
name: Fu, Shu
name: Liu, Min
name: Du, Pengfei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, we propose an orthogonal frequency division multiplexing (OFDM)-based generalized optical quadrature spatial modulation (GOQSM) technique for multiple-input multiple-output optical wireless communication (MIMO-OWC) systems. Considering the error propagation and noise amplification effects when applying maximum likelihood and maximum ratio combining (ML-MRC)-based detection, we further propose a deep neural network (DNN)-aided detection for OFDM-based GOQSM systems. The proposed DNN-aided detection scheme performs the GOQSM detection in a joint manner, which can efficiently eliminate the adverse effects of both error propagation and noise amplification. The obtained simulation results successfully verify the superiority of the deep learning-aided OFDM-based GOQSM technique for high-speed MIMO-OWC systems.
Variable-free exploration of stochastic models: a gene regulatory network example
Creators: name: Erban, Radek
name: Frewen, Thomas A.
name: Wang, Xiao
name: Elston, Timothy C.
name: Coifman, Ronald
name: Nadler, Boaz
name: Kevrekidis, Ioannis G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Computational Physics (physics.comp-ph)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Finding coarse-grained, low-dimensional descriptions is an important task in the analysis of complex, stochastic models of gene regulatory networks. This task involves (a) identifying observables that best describe the state of these complex systems and (b) characterizing the dynamics of the observables. In a previous paper [13], we assumed that good observables were known a priori, and presented an equation-free approach to approximate coarse-grained quantities (i.e, effective drift and diffusion coefficients) that characterize the long-time behavior of the observables. Here we use diffusion maps [9] to extract appropriate observables ("reduction coordinates") in an automated fashion; these involve the leading eigenvectors of a weighted Laplacian on a graph constructed from network simulation data. We present lifting and restriction procedures for translating between physical variables and these data-based observables. These procedures allow us to perform equation-free coarse-grained, computations characterizing the long-term dynamics through the design and processing of short bursts of stochastic simulation initialized at appropriate values of the data-based observables.
description: 26 pages, 9 figures
Editorial Vol. 12(24)-2024: Redimensiones del conocimiento científico
Creators: name: Arámbulo, Elizabeth
Publisher: name: Universidad Nacional Experimental Rafael María Baralt
Year: 2024

description: Perspectivas, Revista de Historia, Geografía, Arte y Cultura, en su N° 24, presenta las aportaciones de las investigaciones que buscan dinamizar y significar elementos que generan desafíos que hacen palpable   una dinámica puntual determinante; que presupone tomar en cuenta un quehacer científico para el abordaje de muchas consideraciones puesta en escena.
Elicitation of vocabulary for constructed and imitation items
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio file VP-160512-12: Elicitation of vocabulary related to items that are constructed from materials ('wooden shoes', 'fur hat') or imitations of something else ('fake', 'toy').
Second-order step-size tuning of SGD for non-convex optimization
Creators: name: Castera, Camille
name: Bolte, Jérôme
name: Févotte, Cédric
name: Pauwels, Edouard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: In view of a direct and simple improvement of vanilla SGD, this paper presents a fine-tuning of its step-sizes in the mini-batch case. For doing so, one estimates curvature, based on a local quadratic model and using only noisy gradient approximations. One obtains a new stochastic first-order method (Step-Tuned SGD), enhanced by second-order information, which can be seen as a stochastic version of the classical Barzilai-Borwein method. Our theoretical results ensure almost sure convergence to the critical set and we provide convergence rates. Experiments on deep residual network training illustrate the favorable properties of our approach. For such networks we observe, during training, both a sudden drop of the loss and an improvement of test accuracy at medium stages, yielding better results than SGD, RMSprop, or ADAM.
description: To appear in Neural Processing Letters (accepted Nov. 2021)
Towards reliable calculations of the correlation function
Creators: name: Maj, Radoslaw
name: Mrowczynski, Stanislaw
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The correlation function of two identical pions interacting via Coulomb potential is computed for a general case of anisotropic particle's source of finite life time. The effect of halo is taken into account as an additional particle's source of large spatial extension. Due to the Coulomb interaction, the effect of halo is not limited to very small relative momenta but it influences the correlation function in a relatively large domain. The relativistic effects are discussed in detail and it is argued that the calculations have to be performed in the center-of-mass frame of particle's pair where the (nonrelativistic) wave function of particle's relative motion is meaningful. The Bowler-Sinyukov procedure to remove the Coulomb interaction is tested and it is shown to significantly underestimate the source's life time.
description: 18 pages, presented at XIth International Workshop on Correlation and Fluctuation in Multiparticle Production, Hangzhou, China, November 21-24, 2006
Αξιολόγηση Ορθότητας Βιβλιογραφικών Συνδέσεων μέσω Crowdsourcing
Creators: name: Βροχίδης, Αλέξανδρος Θεοφάνης
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Βιβλιογραφικές αναφορές
Πληθοπορισμός
Διασυνδεδεμένα Δεδομένα
Bibliographic Links
Crowdsourcing
Linked Data

description: Η παρούσα εργασία πραγματεύεται το ζήτημα της αξιολόγησης μιας υπάρχουσας μεθόδου διασύνδεσης βιβλιογραφικών συνδέσμων. Η μέθοδος αυτή δημιουργήθηκε παλαιότερα σε κώδικα Java και σκοπός της είναι να δημιουργήσει εναλλακτικές βιβλιογραφικές αναφορές για την DBpedia, διασυνδέοντας την έτσι, σε άλλες βιβλιογραφικές βάσεις. Το θέμα αυτής της μεθόδου είναι εμπνευσμένο από το διαγωνισμό “DBpedia citations & references challenge”. Αφού λοιπόν δημιουργήθηκε αυτή η μέθοδος, σειρά έχει η αξιολόγηση της, προκειμένου να διαπιστωθεί εάν λειτουργεί σωστά ή όχι. Η αξιολόγηση αυτή γίνεται μέσω του crowdsourcing. Κατασκευάστηκε ένα website, στο οποίο θα συνδέονται οι υποψήφιοι, προκειμένου να αξιολογήσουν το αποτέλεσμα. Το website θα τους εμφανίζει δύο άρθρα ταυτόχρονα και αυτοί με τη σειρά τους, θα καλούνται να απαντήσουν σχετικά με το εάν είναι όμοια μεταξύ τους τα άρθρα αυτά. Το website θα χρησιμοποιεί τη μέθοδο που προαναφέρθηκε, προκειμένου να εμφανίσει τα επιστημονικά άρθρα.
description: This Master Thesis addresses the issue of evaluating an existing method of linking bibliographic links. This method was previously created in Java code and was intended to generate alternative bibliographic references for DBpedia, thereby linking it to other bibliographic links. The subject of this method is inspired by the “DBpedia citations & references challenge” contest. Evaluation of this method is done through crowdsourcing. A website has been developed in order to for the candidates to evaluate the results. The website will show the user two articles at the same time and will be asked to answer if they are similar. The website will use the method described above to display scientific articles.