cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A pharmacological study of signal transduction mechanisms controlling fluid reabsorption and Ion transport in the locust rectum
Creators: name: Jeffs, Lloyd B.
Publisher: name: University of British Columbia
Year: 2008

description: Like most insects, locusts face severe regulatory challenges associated with arid habitats, high metabolic rates and high surface area to volume ratios. Therefore, the conservation of water, essential ions and metabolites is very important. Consequently, locusts regulate their hemolymph composition primarily by controlling epithelial transport in the excretory system. The locust excretory system is typical of many insects and consists of the Malpighian tubules and the hindgut. The Malpighian tubules secrete a primary isosmotic urine rich in KC1 and low in Na+ that contains most small hemolymph solutes, waste products and toxic plant chemicals. The hindgut (ileum and rectum) is responsible for the enormous changes in composition of the urine, by the selective reabsorption of water, ions and metabolites. Both the Malpighian tubules and the hindgut are under endocrine control. The purpose of this study was to investigate the involvement of second messengers in the control of fluid reabsorption (iv) and Cl- transport in the rectum of the desert locust, Schistocerca gregaria. Various agents known to block or activate specific signal transduction pathways were added to everted rectal sacs and short-circuited rectal flat-sheet bioassays. Cyclic AMP and its analogs were shown to stimulate rectal Jv and Cl-transport to the same extent as aqueous extracts of the nervous lobes of the corporacardiaca, suggesting that activation of the adenylate cyclase pathway is sufficient for maximal stimulation. It also appears that cGMP is involved, since its addition partially stimulated both Cl- and fluid reabsorption. External Ca2+ was not required for the maintenance or stimulation of rectal transport. However, intracellular Ca2+ was shown to influence the control of rectal transport. The role of intracellular Ca2+ appears to be quite complex and may vary with its relative concentration. Finally, it was found that Protein kinase C and the phosphotidylinositol cycle do not appear to be involved in the stimulation of rectal Cl- and fluid transport.
Diffuse Far-ultraviolet Observation of the Lupus Loop Region
Creators: name: Shinn, Jong-Ho
name: Min, Kyoung Wook
name: Lee, Chi-Na
name: Edelstein, Jerry
name: Korpela, Eric J.
name: Welsh, Barry Y.
name: Han, Wonyong
name: Nam, Uk-Won
name: Jin, Ho
name: Lee, Dae-Hee
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Diffuse far-ultraviolet (FUV) emissions from the Lupus Loop region (SNR 330.0+15.0) have been observed with Spectroscopy of Plasma Evolution from Astrophysical Radiation (SPEAR), also known as Far-ultraviolet IMaging Spectrograph (FIMS). We have detected several important ionic lines, including Si II*, C IV, and N IV], which characterize the warm, hot ionized gas in this region. The spatial variations in the line intensities of Si II* and C IV have also been studied in comparison with X-ray and dust observations. The result shows that they originate from the interface between the hot gas seen in the X-ray and the cooler H I shell with which dust is associated. The interface is rather diffuse, and the gases with different temperatures seem to co-exist in this region. A shock may exist upfront in the interface, but its velocity should be very small as no shock-related distinguished feature is seen in Ha.
description: Accepted in ApJL, 4 pages, 3 figures
Broadband quantum memory in a cavity via zero spectral dispersion
Creators: name: Moiseev, E. S.
name: Tashchilina, Arina
name: Moiseev, S. A.
name: Sanders, Barry C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We seek to design experimentally feasible broadband, temporally multiplexed optical quantum memory with near-term applications to telecom bands. Specifically, we devise dispersion compensation for an impedance-matched narrow-band quantum memory by exploiting Raman processes over two three-level atomic subensembles, one for memory and the other for dispersion compensation. Dispersion compensation provides impedance matching over more than a full cavity linewidth. Combined with one second spin-coherence lifetime the memory could be capable of power efficiency exceeding 90% leading to 106 modes for temporal multiplexing. Our design could lead to significant multiplexing enhancement for quantum repeaters to be used for telecom quantum networks.
Lagrangian of the quasi-rigid extended charge
Creators: name: Medina, Rodrigo
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is proposed a Lagrangian for the quasi-rigid extended charged particle, which consists of a bare point particle term plus the standard electromagnetic minimal coupling. The quasi-rigid motion is imposed as a constraint. The extension of the particle and the quasi-rigid motion appear inside the current density. The Lorentz contraction of the extended particle makes the interaction term dependent on the acceleration. This dependence produces the additional terms in the equations of motion that are necessary for the proper energy and momentum conservation, and that were previously identified as the inertial effects of stress. The momentum of stress is obtained as an explicit function of the electromagnetic field.
description: 10 pages, latex, submitted to JPA
Magnetoelectric effects in superconductors due to spin-orbit scattering: a non-linear $σ$-model description
Creators: name: Virtanen, P.
name: Bergeret, F. S.
name: Tokatly, I. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We suggest a generalization of nonlinear $σ$-model for diffusive superconducting systems to account for magnetoelectric effects due to spin-orbit scattering. In the leading orders of spin-orbit strength and gradient expansion it includes two additional terms responsible for the spin-Hall effect and the spin-current swapping. First, assuming a delta-correlated disorder we derive the new terms from the Keldysh path integral representation of the generating functional. Then we argue phenomenologically that they exhaust all invariants allowed in the effective action to the leading order in the spin-orbit coupling (SOC). Finally, the results are confirmed by a direct derivation of the saddle-point (Usadel) equation from the quantum kinetic equations in the presence of randomly distributed impurities with SOC. At this point we correct a recent derivation of the Usadel equation that includes magneto-electric effects and does not resort to the Born approximation.
description: 6 pages
Polarization from aligned atoms as a diagnostics of circumstellar, AGN and interstellar magnetic fields: II. Atoms with Hyperfine Structure
Creators: name: Yan, Huirong
name: Lazarian, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We show that atomic alignment presents a reliable way to study topology of astrophysical magnetic fields. The effect of atomic alignment arises from modulation of the relative population of the sublevels of atomic ground state pumped by anisotropic radiation flux. As such aligned atoms precess in the external magnetic field and this affects the properties of the polarized radiation arising from both scattering and absorption by the atoms. As the result the polarizations of emission and absorption lines depend on the 3D geometry of the magnetic field as well as the direction and anisotropy of incident radiation. We consider a subset of astrophysically important atoms with hyperfine structure. For emission lines we obtain the dependencies of the direction of linear polarization on the directions of magnetic field and the incident pumping radiation. For absorption lines we establish when the polarization is perpendicular and parallel to magnetic field. For both emission and absorption lines we find the dependence on the degree of polarization on the 3D geometry of magnetic field. We claim that atomic alignment provides a unique tool to study magnetic fields in circumstellar regions, AGN, interplanetary and interstellar medium. This tool allows studying of 3D topology of magnetic fields and establish other important astrophysical parameters. We consider polarization arising from both atoms in the steady state and also as they undergo individual scattering of photons. We exemplify the utility of atomic alignment for studies of astrophysical magnetic fields by considering a case of Na alignment in a comet wake.
description: 23 pages, 20 figures, ApJ, in press, minor changes
Επικουρικά Όργανα του Ο.Η.Ε.: Ίδρυση, Αρμοδιότητες και Έννομες Συνέπειες των Πράξεών τους
Creators: name: Τσιαμπέρα, Αικατερίνη Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ο.Η.Ε.-Οργανισμός Ηνωμένων Εθνών
Επικουρικά Όργανα
Γενική Συνέλευση
Συμβούλιο Ασφαλείας
United Nations
Subsidiary Organs
General Assembly
Security Council

description: Σκοπός της παρούσας διπλωματικής εργασίας είναι να προσφέρει στον αναγνώστη μία ακριβή και όσο το δυνατό σχολαστική παρουσίαση όλων των θεμάτων που αφορούν στα επικουρικά όργανα των Ηνωμένων Εθνών, με ειδική μνεία στην ίδρυσή τους, στις αρμοδιότητές τους και στις έννομες συνέπειες των πράξεών τους. Αρχικά, προσφέρεται μία γενική θεώρηση των Διεθνών Οργανισμών, ειδικά σχετικά με την ουσία τους, τα χαρακτηριστικά από τα οποία αποτελούνται και τη νομική τους προσωπικότητα. Στη συνέχεια, εξηγείται ο ορισμός της έννοιας «επικουρικά όργανα», κυρίως σε ό,τι αφορά και τη θεωρία των Διεθνών Οργανισμών και τον Ο.Η.Ε., ενώ απαριθμώνται τα βασικά χαρακτηριστικά τους. Έπειτα, παρουσιάζεται μία ανάλυση των βασικών προϋποθέσεων υπό τις οποίες ένα επικουρικό όργανο μπορεί να ιδρυθεί. Επιπλέον, δίδεται ιδιαίτερη μνεία στην ίδρυση επικουρικών οργάνων τόσο από τη Γενική Συνέλευση, όσο και από το Συμβούλιο Ασφαλείας, σύμφωνα με τα Άρθρα 22 και 29 του Χάρτη των Ηνωμένων Εθνών, αντίστοιχα. Σχετικά με τα θέματα αυτά, εξετάζονται Αποφάσεις και Γνωμοδοτήσεις του Διεθνούς Δικαστηρίου Δικαιοσύνης, καθώς και του Διεθνούς Ποινικού Δικαστηρίου για την πρώην Γιουγκοσλαβία, κυρίως για να προσεγγιστεί το ζήτημα της εκχωρήσεως κύριων και δοτών αρμοδιοτήτων από το κύριο όργανο στο επικουρικό του όργανο, καθώς και τις έννομες συνέπειες αυτής.
description: The aim of the present dissertation is to provide the reader with an accurate and, as thorough as possible, presentation of all aspects concerning the subsidiary organs of the United Nations, with special regard to their establishment, their competence and the legal consequences of their actions. To begin with, a general overview of the international organizations is provided, regarding their essence, the characteristics of which they consist, and their legal personality. Next, the meaning of the term “subsidiary organs” is explained, as regards both the theory of the Law of International Institutions and the United Nations, whilst their basic characteristics are enumerated. Afterwards, an analysis of the basic circumstances under which a subsidiary organ can be stablished, is presented. Moreover, special attention is paid to the establishment of subsidiary organs by both the General Assembly and the Security Council, pursuant to the Articles No. 22 and 29 of the UN Charter, respectively. Several International Court of Justice Judgments and Advisory Opinions, as well as some issued from the International Criminal Tribunal for the f. Yugoslavia, are thoroughly examined, in order to assess the transfer of express and implied powers from the principal organ to its subsidiary, as well as the legal consequences of this transfer.
Ultrafine Particles in Mexico City Metropolitan Area: a review
Creators: name: Cardenas, Beatriz
name: Alberto, Aguilar
name: Benitez, Sandy
name: González, Eder Herget
name: Jaimes, Monica
name: Retama, Armando
Publisher: name: Karlsruhe
Year: 2019

description: Mexico City Metropolitan Area (MCMA), once identified as the most polluted city in the world few decades ago is now a history of success in terms of air quality. As a result of a series of air quality actions implemented over the last 25 years, air quality has improved considerable. Based on a robust air monitoring and health databases, a recent study have shown that reductions in PM2.5 in this period, avoided 22,500 premature deaths approximately. Still, there is more way to go since quality standards are not attained yet for ozone and particulate matter (PM2.5 annual average concentrations in 2017 were 23 μg/m3 and 30 μg/m3, in Mexico City and Metropolitan area monitoring sites, respectively). Existing data either from emissions inventories, continuous monitoring and field campaigns have shown the contribution of the different emissions sources, highlighting the important role of transportation in emissions and formation of ultrafine particles in MCMA. Few pilot studies have shown the high level of ultrafine particles emissions of the existing heavy duty diesel fleet (Euro II and III). In addition, results of ultrafine particles emissions of gasoline light vehicles measured at the inspection and maintenance test shown that old vehicles among other characteristics are also high emitters. In despite of the above, ultrafine particles emissions and/or ambient concentrations are not yet part of the policy and/or regulation discussion in Mexico. The intention of this paper is to present a review of existing information of ultrafine particles in MCMA in order to analyze the impact of existing and planed control measures for air pollutants on ultrafine emissions and formation.
The Effects of $Λ$CDM Dark Matter Substructure on the Orbital Evolution of Star Clusters
Creators: name: Pavanel, Nicholas
name: Webb, Jeremy J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a comprehensive study on how perturbations due to a distribution of $Λ$CDM dark matter subhalos can lead to star clusters deviating from their orbits. Through a large suite of massless test particle simulations, we find that (1) subhalos with masses less than $10^8 M_{\odot}$ negligibly affect test particle orbits, (2) perturbations lead to orbital deviations only in environments with substructure fractions $f_{sub} \geq 1\%$, (3) perturbations from denser subhalos produce larger orbital deviations, and (4) subhalo perturbations that are strong relative to the background tidal field lead to larger orbital deviations. To predict how the variation in test particle orbital energy $σ_e(t)$ increases with time, we test the applicability of theory derived from single-mass subhalo populations to populations where subhalos have a mass spectrum. We find $σ_e(t)$ can be predicted for test particle evolution within a mass spectrum of subhalos by assuming subhalos all have masses equal to the mean subhalo mass and by using the local mean subhalo separation to estimate the change in test particle velocities due to subhalo interactions. Furthermore, the orbital distance variation at an orbital distance $r$ can be calculated via $σ_r=2.98 \times 10^{-5} \pm 8 \times 10^{-8} (\rm kpc^{-1} km^{-2} s^{2}) \times r \times σ_e$ with a dispersion about the line of best fit equalling 0.08 kpc. Finally, we conclude that clusters that orbit within 100 kpc of Milky Way-like galaxies experience a change no greater than $2\%$ in their dissolution times.
description: 9 pages, 7 figures, 1 table, accepted for publication in MNRAS
Ectopic expression of human and feline CD9 in a Human B cell line confers ß1 integrin-dependent motility on fibronectin and laminin substrates and enhanced tyrosine phosphorylation
Creators: name: Shaw, Andrew R. E.; Domanska, Agatha; Mak, Allan; Gilchrist, Anita; Dobler, Kelly; Visser, Lydia; Poppema, Sibrand; Fliegel, Larry; Letarte, Michelle; Willett, Brian J.
Publisher: name: University of Alberta Libraries
Year: 1995

Abstract
Semi-classical predictions of cosmological wave-packets from ridge-lines
Creators: name: Lan, Chen
name: Wang, Yi-Fan
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We introduce a concept of ridge-lines to investigate the semi-classical prediction from wave-packets with arbitrary width in conventional quantum mechanics and the Wheeler--DeWitt quantum cosmology. Two primary approaches are applied to the exact calculation of the ridge-lines, namely the contour and the stream approach. Moreover, aspects of these are discussed and compared to other scenarios and approaches, i.e. the narrow WKB wave-packets and the first-derivative test. As the main result, we show that the semi-classical predictions in toy models have more abundant solutions than in the classical theory, and most interestingly they may deviate from classical solutions due to the quantum corrections.
description: 44 pages, 14 figures, 3 tables
A statistical mechanics approach to macroscopic limits of car-following traffic dynamics
Creators: name: Chiarello, Felisia Angela
name: Piccoli, Benedetto
name: Tosin, Andrea
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences
subject: 35Q20, 35Q70, 90B20

description: We study the derivation of macroscopic traffic models from car-following vehicle dynamics by means of hydrodynamic limits of an Enskog-type kinetic description. We consider the superposition of Follow-the-Leader (FTL) interactions and relaxation towards a traffic-dependent Optimal Velocity (OV) and we show that the resulting macroscopic models depend on the relative frequency between these two microscopic processes. If FTL interactions dominate then one gets an inhomogeneous Aw-Rascle-Zhang model, whose (pseudo) pressure and stability of the uniform flow are precisely defined by some features of the microscopic FTL and OV dynamics. Conversely, if the rate of OV relaxation is comparable to that of FTL interactions then one gets a Lighthill-Whitham-Richards model ruled only by the OV function. We further confirm these findings by means of numerical simulations of the particle system and the macroscopic models. Unlike other formally analogous results, our approach builds the macroscopic models as physical limits of particle dynamics rather than assessing the convergence of microscopic to macroscopic solutions under suitable numerical discretisations.
description: 21 pages, 6 figures
Matter Collineations of Static Spacetimes with Maximal Symmetric Transverse Spaces
Creators: name: Sharif, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper is devoted to study the symmetries of the energy-momentum tensor for the static spacetimes with maximal symmetric transverse spaces. We solve matter collineation equations for the four main cases by taking one, two, three and four non-zero components of the vector $ξ^a$. For one component non-zero, we obtain only one matter collineation for the non-degenerate case and for two components non-zero, the non-degenerate case yields maximum three matter collineations. When we take three components non-zero, we obtain three, four and five independent matter collineations for the non-degenerate and for the degenerate cases respectively. This case generalizes the degenerate case of the static spherically symmetric spacetimes. The last case (when all the four components are non-zero) provides the generalization of the non-degenerate case of the static spherically symmetric spacetimes. This gives either four, five, six, seven or ten independent matter collineations in which four are the usual Killing vectors and rest are the proper matter collineations. It is mentioned here that we obtain different constraint equations which, on solving, may provide some new exact solutions of the Einstein field equations.
description: 33 pages, accepted for publication in Acta Physica Polonica B
Double species condensate with tunable interspecies interactions
Creators: name: Thalhammer, G.
name: Barontini, G.
name: De Sarlo, L.
name: Catani, J.
name: Minardi, F.
name: Inguscio, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We produce Bose-Einstein condensates of two different species, $^{87}$Rb and $^{41}$K, in an optical dipole trap in proximity of interspecies Feshbach resonances. We discover and characterize two Feshbach resonances, located around 35 and 79 G, by observing the three-body losses and the elastic cross-section. The narrower resonance is exploited to create a double species condensate with tunable interactions. Our system opens the way to the exploration of double species Mott insulators and, more in general, of the quantum phase diagram of the two species Bose-Hubbard model.
description: 4 pages, 4 figures
Extraction of Spectral Functions from Dyson-Schwinger Studies via the Maximum Entropy Method
Creators: name: Nickel, Dominik
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: It is shown how to apply the Maximum Entropy Method (MEM) to numerical Dyson-Schwinger studies for the extraction of spectral functions of correlators from their corresponding Euclidean propagators. Differences to the application in lattice QCD are emphasized and, as an example, the spectral functions of massless quarks in cold and dense matter are presented.
description: 16 pages, 7 figures
Persistence and change in regional entrepreneurship performance: a three-economy comparison
Creators: name: Fritsch, Michael
name: Potter, Jonathan
name: Qian, Haifeng
name: Fotopoulos, Georgios
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: This paper compares the factors related to the persistence and change of regional levels of new business formation in the United States, England and Wales, and West Germany. The three economies are highly comparable both in levels of path dependency in their regional start-up rate rankings and in the factors related to long-term changes in regional start-up performance. Regional levels of human capital, foreign-born population and population density explain improvement regional performance, whereas regional wages, population age structure, small firm presence and regional industry structure are not major factors. We propose policy implications and an agenda for further research.
Resummation of quantum radiation reaction in plane waves
Creators: name: Torgrimsson, Greger
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a new approach to obtain the momentum expectation value of an electron in a high-intensity laser, including multiple photon emissions and loops. We find a recursive formula that allows us to obtain the $\mathcal{O}(α^n)$ term from $\mathcal{O}(α^{n-1})$, which can also be expressed as an integro-differential equation. In the classical limit we obtain the solution to the Landau-Lifshitz equation to all orders. We show how spin-dependent quantum radiation reaction can be obtained by resumming both the energy expansion as well as the $α$ expansion.
description: 7 pages, 4 figures
Exact solutions of Brans-Dicke cosmology with decaying vacuum density
Creators: name: Montenegro, A. E.
name: Carneiro, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate cosmological solutions of Brans-Dicke theory with both the vacuum energy density and the gravitational constant decaying linearly with the Hubble parameter. A particular class of them, with constant deceleration factor, sheds light on the cosmological constant problems, leading to a presently small vacuum term, and to a constant ratio between the vacuum and matter energy densities. By fixing the only free parameter of these solutions, we obtain cosmological parameters in accordance with observations of both the relative matter density and the universe age. In addition, we have three other solutions, with Brans-Dicke parameter w = -1 and negative cosmological term, two of them with a future singularity of big-rip type. Although interesting from the theoretical point of view, two of them are not in agreement with the observed universe. The third one leads, in the limit of large times, to a constant relative matter density, being also a possible solution to the cosmic coincidence problem.
description: Minor changes, references added. Version accepted for publication in Classical and Quantum Gravity
Individualized Context-Aware Tensor Factorization for Online Games Predictions
Creators: name: Jiang, Julie
name: Lerman, Kristina
name: Ferrara, Emilio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Individual behavior and decisions are substantially influenced by their contexts, such as location, environment, and time. Changes along these dimensions can be readily observed in Multiplayer Online Battle Arena games (MOBA), where players face different in-game settings for each match and are subject to frequent game patches. Existing methods utilizing contextual information generalize the effect of a context over the entire population, but contextual information tailored to each individual can be more effective. To achieve this, we present the Neural Individualized Context-aware Embeddings (NICE) model for predicting user performance and game outcomes. Our proposed method identifies individual behavioral differences in different contexts by learning latent representations of users and contexts through non-negative tensor factorization. Using a dataset from the MOBA game League of Legends, we demonstrate that our model substantially improves the prediction of winning outcome, individual user performance, and user engagement.
Genre determining prediction: Non-standard TAM marking in football language
Creators: name: Egetenmeyer, Jakob
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: German and French football language display tense-aspect-mood (TAM) forms which differ from the TAM use in other genres. In German football talk, the present indicative may replace the pluperfect subjunctive. In French reports of football matches, the imperfective past may occur instead of a perfective past tense-aspect form. We argue that the two phenomena share a functional core and are licensed in the same way, which is a direct result of the genre they occur in. More precisely, football match reports adhere to a precise script and specific events are temporally determined in terms of objective time. This allows speakers to exploit a secondary function of TAM forms, namely, they shift the temporal perspective. We argue that it is on the grounds of the genre that comprehenders predict the deviating forms and are also able to decode them. We present various corpus studies where we explore the functioning of these phenomena in order to gain insights into their distribution, grammaticalization and their functioning in discourse. Relevant factors are Aktionsart properties, rhetorical relations and their interaction with other TAM forms. This allows us to discuss coping mechanisms on the part of the comprehender. We broaden our understanding of the phenomena, which have only been partly covered for French and up to now seem to have been ignored in German.
description: 23 pages, submitted to Frontiers in Communication
Classifying charge carrier interaction in highly-compressed elements and silane
Creators: name: Talantsev, E. F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Since pivotal experimental discovery of the near-room-temperature superconductivity (NRTS) in highly-compressed sulphur hydride by Drozdov et al (2015 Nature 525 73-76), more than a dozen of binary and of ternary hydrogen-rich phases exhibited superconducting transition above 100 K have been discovered to date. There is a widely accepted theoretical point of view that primary mechanism governing the emergence of superconductivity in hydrogen-rich phases is the electron-phonon pairing. However, our recent analysis of experimental temperature dependent resistance in $H_{3}S$, $LaH_{x}$, $PrH_{9}$ and $BaH_{12}$ (arXiv: 2104.14145) showed that these compounds exhibit the dominance of non-electron-phonon charge carrier interaction and, thus, it is unlikely that the electron-phonon pairing is the primary mechanism for the emergence of superconductivity in these materials. Here we use the same approach to reveal charge carrier interaction in highly-compressed lithium, black phosphorous, sulfur, and silane. We found that all these superconductors exhibit the dominance of non-electron-phonon charge carrier interaction. This explains the failure of high-Tc values predicted for these materials by the first-principles calculations which utilized the electron-phonon pairing as the mechanism for the emergence of superconductivity in these materials. Our result implies that alternative pairing mechanisms (i.e., electron-magnon, electron-polaron, electron-electron, etc.) should be tested within first-principles calculations approach as possible mechanisms for the emergence of superconductivity in highly-compressed superconductors.
description: 13 pages, 4 figures
Distance and mass of the NGC 253 galaxy group
Creators: name: Karachentsev, Igor D.
name: Tully, R. Brent
name: Anand, Gagandeep S.
name: Rizzi, Luca
name: Shaya, Edward J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Two dwarf galaxies: WOC2017-07 and PGC 704814 located in the vicinity of the nearby luminous spiral galaxy NGC 253 were observed with the Advanced Camera for Surveys on the Hubble Space Telescope. Their distances of 3.62$\pm$0.18 Mpc and 3.66$\pm$0.18 Mpc were derived using the tip of the red giant branch method. These distances are consistent with the dwarf galaxies being members of the NGC 253 group. Based on the radial velocities and projected separations of seven assumed dwarf companions, we estimated the total mass of NGC 253 to be $(8.1\pm2.6) 10^{11} M_{\odot}$, giving a total-mass-to-$K$-luminosity ratio $M_{\rm orb}/L_K = (8.5\pm2.7) M_{\odot}/L_{\odot}$. A notable property of NGC 253 is its declined rotation curve. NGC 253 joins four other luminous spiral galaxies in the Local Volume with declined rotation curves (NGC 2683, NGC 2903, NGC 3521 and NGC 5055) that together have the low average total-mass-to-luminosity ratio, $M_{\rm orb}/L_K = (5.5\pm1.1) M_{\odot}/L_{\odot}$. This value is only $\sim$1/5 of the corresponding ratio for the Milky Way and M 31.
description: 8 pages, 3 figures, 2 tables. Accepted to ApJ
Quasi-spherical collapse with cosmological constant
Creators: name: Debnath, Ujjal
name: Nath, Soma
name: Chakraborty, Subenoy
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The junction conditions between static and non-static space-times are studied for analyzing gravitational collapse in the presence of a cosmological constant. We have discussed about the apparent horizon and their physical significance. We also show the effect of cosmological constant in the collapse and it has been shown that cosmological constant slows down the collapse of matter.
description: 7 pages, No figures, RevTeX style
Gauss-Bonnet brane gravity with a confining potential
Creators: name: Heydari-Fard, M.
name: Sepangi, H. R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A brane scenario is envisaged in which the $m$-dimensional bulk is endowed with a Gauss-Bonnet term and localization of matter on the brane is achieved by means of a confining potential. The resulting Friedmann equations on the brane are modified by various extra terms that may be interpreted as the X-matter, providing a possible phenomenological explanation for the accelerated expansion of the universe. The age of the universe in this scenario is studied and shown to be consistent with the present observational data.
description: 14 pages, 4 figures, to appear in PRD
Coexistence of anomalous field effect and mesoscopic conductance fluctuations in granular aluminium
Creators: name: Delahaye, J.
name: Grenet, T.
name: Gay, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We perform electrical field effect measurements at 4 K on insulating granular aluminium thin films. When the samples size is reduced below 100 micrometers, reproducible and stable conductance fluctuations are seen as a function of the gate voltage. Our results suggest that these fluctuations reflect the incomplete self-averaging of largely distributed microscopic resistances. We also study the anomalous field effect (conductance dip) already known to exit in large samples and its slow conductance relaxation in the presence of the conductance fluctuations. Within our measurements accuracy, the two phenomena appear to be independent of each other, like two additive contributions to the conductance. We discuss the possible physical meaning of this independence and in particular whether or not this observation is in favor of an electron glass interpretation of slow conductance anomaly relaxations.
description: 16 pages, 26 figures
Ultraslow Propagation of Squeezed Vacuum Pulses with Electromagnetically Induced Transparency
Creators: name: Akamatsu, Daisuke
name: Yokoi, Yoshihiko
name: Arikawa, Manabu
name: Nagatsuka, Satoshi
name: Tanimura, Takahito
name: Furusawa, Akira
name: Kozuma, Mikio
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have succeeded in observing ultraslow propagation of squeezed vacuum pulses with electromagnetically induced transparency. Squeezed vacuum pulses (probe lights) were incident on a laser cooled 87Rb gas together with an intense coherent light (control light). A homodyne method sensitive to the vacuum state was employed for detecting the probe pulse passing through the gas. A delay of 3.1us was observed for the probe pulse having a temporal width of 10 us.
Frequency-scanned microresonator soliton comb with the tracking of the frequency of all comb modes
Creators: name: Kuse, Naoya
name: Navickaite, Gabriele
name: Geiselmann, Michael
name: Yasui, Takeshi
name: Minoshima, Kaoru
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Rapid and large scanning of a dissipative Kerr-microresonator soliton comb with the characterization of all comb modes along with the separation of the comb modes is imperative for the emerging applications of the frequency-scanned soliton combs. However, the scan speed is limited by the gain of feedback systems and the measurement of the frequency shift of all comb modes has not been demonstrated. To overcome the limitation of the feedback, we incorporate the feedback with the feedforward. With the additional gain of > 40 dB by a feedforward signal, a dissipative Kerr-microresonator soliton comb is scanned by 70 GHz in 500 $μ$s, 50 GHz in 125 $μ$s, and 25 GHz in 50 $μ$s (= 500 THz/s). Furthermore, we propose and demonstrate a method to measure the frequency shift of all comb modes, in which an imbalanced Mach-Zehnder interferometer with two outputs with different wavelengths is used. Because of the two degrees of freedom of optical frequency combs, the measurement at the two different wavelengths enables the estimation of the frequency shift of all comb modes.
The NN phase shifts in the extended quark-delocalization, color-screening model
Creators: name: Lu, Xi-Feng
name: Ping, Jia-Lun
name: Wang, Fan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: An alternative method is applied to the study of nucleon-nucleon(NN) scattering phase shifts in the framework of extended quark delocalization, color-screening model(QDCSM), where the one-pion-exchange(OPE) with short-range cutoff is included.
description: 5 pages, 3 figures, two-column
Ising spin glass in a random network with a gaussian random field
Creators: name: Erichsen, R.
name: Silveira, A.
name: Magalhaes, S. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate thermodynamic phase transitions of the joint presence of spin glass (SG) and random field (RF) using a random graph model that allows us to deal with the quenched disorder. Therefore, the connectivity becomes a controllable parameter in our theory, allowing us to answer what the differences are between this description and the mean-field theory i.e., the fully connected theory. We have considered the random network random field Ising model where the spin exchange interaction as well as the RF are random variables following a Gaussian distribution. The results were found within the replica symmetric (RS) approximation, whose stability is obtained using the two-replica method. This also puts our work in the context of a broader discussion, which is the RS stability as a function of the connectivity. In particular, our results show that for small connectivity there is a region at zero temperature where the RS solution remains stable above a given value of the magnetic field no matter the strength of RF. Consequently, our results show important differences with the crossover between the RF and SG regimes predicted by the fully connected theory.
Ανάπτυξη Καταλυτών για Παραγωγή Νανοδομημένου Γραφενίου
Creators: name: Κώτσης, Θεοφάνης Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Ανάπτυξη καταλυτών
Νανοδομημένο
Γραφένιο
Catalyst development
Nanostructured
Graphene

description: Στην παρούσα εργασία κατασκευάσθηκαν νανοσωματίδια χαλκού πάνω σε υποστρώματα πυριτίου με διεύθυνση επιπέδων {100} αλλά και σε υποστρώματα διοξειδίου του πυριτίου πάχους 110nm, μέσω της ηλεκτρολυτικής μεθόδου. Σταγόνα υδατικού διαλύματος με θειούχο χαλκό (CuSO4) και υδροφθόριο (HF) εναποτίθεται στην επιφάνεια του υποστρώματος για ένα χρονικό διάστημα και στη συνέχεια μέσω ανόπτησης υπό κενό γίνεται η μορφοποίηση των νανοσωματιδίων. Στη συνέχεια, μέσω χαμηλής πιέσεως χημικής εναπόθεσης ατμών (LP-CVD) με πρόδρομη ένωση την ασετιλίνη (C2H2), τα νανοσωματίδια χαλκού αποτελούν τον καταλύτη ώστε να αναπτυχθούν λεπτά στρώματα γραφενίου που τα περιβάλλουν. Ο χαρακτηρισμός του γραφενίου έγινε μέσω φασματοσκοπίας Raman, όπου ελέγχθηκε η ύπαρξη του γραφενίου και στη συνέχεια προσδιορίστηκε η ποιότητα του παραγομένου γραφενίου. Επιπρόσθετα, προσδιορίστηκαν οι οπτικές ιδιότητες των νανοσωματιδίων χαλκού μέσα από το φάσμα της οπτικής ανακλαστικότητας μέσω της Φασματοσκοπίας Οπτικής Ανακλαστικότητας και ταυτόχρονα επιλέχθηκε η κατάλληλη ποσότητα χαλκού πάνω στα υποστρώματα πυριτίου. Τέλος, προσδιορίστηκε η μορφολογία της επιφάνειας των νανοσωματιδίων χαλκού μέσω της μελέτης εικόνων Ηλεκτρονικής Μικροσκοπίας Σάρωσης πριν και μετά την ανόπτησή τους. Διαπιστώθηκε, πως μπορεί να αναπτυχθεί γραφένιο σε νανοσωματίδια χαλκού με καταλυτικό παράγοντα το μέγεθος των νανοσωματιδίων χαλκού όπου γίνεται και ένας εκτενής έλεγχος για το μέγεθός τους.
description: The scope of the present thesis is the development of a simple and low cost method of electroless metal deposition process for the production of through the development of catalytic Cu nanoparticles deposited on Si/SiO2substrate for nanostructured graphene growth via low pressure chemical vapor deposition using acetylene (C2H2) as the precursor gas. We systematically investigate the effects of the electroless deposition time of Cu’s nanoparticles to the number of the graphene layers that are grown on them. We use Raman scattering to identify and analyze the graphene layers. Also, scanning electron microscopy and optical reflectance spectroscopy are used to analyze the surface morphology of both the Cu nanoparticles and the graphene layers. It is proved that this method of graphene layers is superior in terms of better control and stability of annealing and it is fast and cost effective.
description: Σε συνεργασία με το Ινστιτούτο Τεχνολογίας Γκρενόμπλ (Γαλλία), το ΕΚΕΦΕ Δημόκριτος, και το CNRS (Centre National de la Researche Scientifique, Γαλλία)
Κριτική αντιπαραβολή της ελληνικής και αγγλικής μετάφρασης του μυθιστορήματος του Arturo Perez Reverte El club Dumas.
Creators: name: Δοσεμετζή, Βασιλική Λεωνίδα
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Ισοδυναμία μεταξύ πρωτότυπου και μεταφράσματος
Κριτική μετάφρασης
Κριτική αντιπαραβολή
Equivalence between target language and source language
Translation review
Critical comparison

description: Στην παρούσα εργασία θα πραγματοποιήσουμε την κριτική δύο μεταφράσεων. Το πρωτότυπο βιβλίο που επιλέξαμε είναι το μυθιστόρημα El club Dumás του Arturo Pérez Reverte. Οι μεταφράσεις που θα εξετάσουμε είναι η ελληνική και η αγγλική. Για να διεξάγουμε αυτή την κριτική αντιπαραβολή, επιλέξαμε την πρώτη παράγραφο από κάθε ένα από τα δεκαέξι κεφάλαια του βιβλίου. Κύριος στόχος αυτής της εργασίας είναι να θέσουμε κάποιες παραμέτρους τις οποίες θα μπορούσε να χρησιμοποιήσει ο εκάστοτε κριτικός, έτσι ώστε να επιτευχθεί μια άρτια κριτική. Τα κριτήρια που έχουμε θέσει είναι τα εξής: νοηματική ισοδυναμία μεταξύ ΓΠ και ΓΣ, υφολογική ισοδυναμία μεταξύ ΓΠ και ΓΣ και ορθή χρήση της ΓΣ. Στο τέλος αυτής της εργασίας θα διαπιστώσουμε εάν οι δύο μεταφραστές ανταποκρίνονται στα κριτήρια που έχουμε θέσει και εάν οι μεταφραστές διατηρούν την ίδια νόρμα κατά τη διάρκεια του μεταφραστικού εγχειρήματος.
description: In this dissertation we will conduct the review of two translations. The original book that we have selected is Arturo Pérez Reverte’s novel El club Dumás. The translations which we are going to revise are the English and the Greek translation. In order to perform this critical comparison we have selected the first paragraph from every single one of the sixteen chapters of the book. The main purpose of our research is to establish some parameters that critics would be able to use in order to perform an accurate review. The criteria that we have posed are: equivalence in meaning between TL and SL, equivalence in style between TL and SL and correct usage of the TL. At the end of this research we will determine if those two translators correspond to the criteria that we have posed and if the translators maintain the same norm throughout the translation procedure.
Modelling of tunnelling currents in Hf-based gate stacks as a function of temperature and extraction of material parameters
Creators: name: Campera, Andrea
name: Iannaccone, Giuseppe
name: Crupi, Felice
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this paper we show that through electrical characterization and detailed quantum simulations of the capacitance-voltage and current-voltage characteristics it is possible to extract a series of material parameters of alternative gate dielectrics. We have focused on HfO2 and HfSiXOYNZ gate stacks and have extracted information on the nature of localized states in the dielectric responsible for a trap-assisted tunneling current component and for the temperature behavior of the I-V characteristics. Simulations are based on a 1D Poisson-Schrdinger solver capable to provide the pure tunneling current and Trap Assisted Tunneling component. Energy and capture cross section of traps responsible for TAT current have been extracted.
description: Preprint version of a paper submitted to TED, Transaction on Electron Devices. this is the final reviewed version. This work studies HfO2 and HfSiXOYNZ gate stacks, their C-V and I-V characteristics. A temperature dependent Trap Assisted Tunnneling model was developed to explain the temperature dependence of the I-V chaacteristics
Uhlmann phase in composite systems with entanglement
Creators: name: Villavicencio, J.
name: Cota, E.
name: Rojas, F.
name: Maytorena, J. A.
name: Galindo, D. Morachis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study the geometric Uhlmann phase of entangled mixed states in a composite system made of two coupled spin-$\frac 1 2$ particles with a magnetic field acting on one of them. Within a depolarizing channel setup, an exact analytical expression for such a phase in each subsystem is derived. We find an explicit connection to the concurrence of the depolarizing channel density matrix, which allows to characterize the features of the Uhlmann phase in terms of the degree of entanglement in the system. In the space of field direction and coupling parameter, it exhibits a phase singularity revealing a topological transition between orders with different winding numbers. The transition occurs for fields lying in the equator of the sphere of directions and at critical values of the coupling which can be controlled by tuning the depolarization strength. Notably, under these conditions the concurrence of the composite system is bounded to the range $[0,1/2]$. We also compare the calculated Uhlmann phase to an interferometric phase, which has been formulated as an alternative for density matrices. The latter does not present a phase vortex, although they coincide in the weak entanglement regime, for vanishing depolarization (pure states). Otherwise they behave clearly different in the strong entanglement regime.
description: 10 pages, 8 figures