cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Persistent Coherence and Spin-Polarization of Topological Surface States on Topological Insulators
Creators: name: Pan, Z. -H.
name: Vescovo, E.
name: Fedorov, A. V.
name: Gu, G. D.
name: Valla, T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Gapless surface states on topological insulators are protected from elastic scattering on non-magnetic impurities which makes them promising candidates for low-power electronic applications. However, for wide-spread applications, these states should remain coherent and significantly spin polarized at ambient temperatures. Here, we studied the coherence and spin-structure of the topological states on the surface of a model topological insulator, Bi2Se3, at elevated temperatures in spin and angle-resolved photoemission spectroscopy. We found an extremely weak broadening and essentially no decay of spin polarization of the topological surface state up to room temperature. Our results demonstrate that the topological states on surfaces of topological insulators could serve as a basis for room temperature electronic devices.
description: 5 pages, 3 figures
Molekulare Charakterisierung von Beet mild yellowing virus (BMYV) und Beet chlorosis virus (BChV) sowie Selektion von BMYV Amplicon-transgenen Nicotiana benthamiana
Creators: name: Stephan, Dirk
Publisher: name: Hannover : Universität
Year: 2005
Subjects: subject: Beet mild yellowing virus (BMYV)
subject: amplicon
subject: full-length clone
subject: agroinfection
subject: Dewey Decimal Classification::600 | Technik::630 | Landwirtschaft, Veterinärmedizin

description: [no abstract]
Helianthemum nummularium
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: H. nummularium X salicifolium (=H. Farqueüi Christ) - 2: Creux du Loup ob Branson (F. 1919). (Fraglicher Bastard: Verf.)
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Thermodynamics of Strongly Correlated One-Dimensional Bose Gases
Creators: name: Vogler, Andreas
name: Labouvie, Ralf
name: Stubenrauch, Felix
name: Barontini, Giovanni
name: Guarrera, Vera
name: Ott, Herwig
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate the thermodynamics of one-dimensional Bose gases in the strongly correlated regime. To this end, we prepare ensembles of independent 1D Bose gases in a two-dimensional optical lattice and perform high-resolution in situ imaging of the column-integrated density distribution. Using an inverse Abel transformation we derive effective one-dimensional line-density profiles and compare them to exact theoretical models. The high resolution allows for a direct thermometry of the trapped ensembles. The knowledge about the temperature enables us to extract thermodynamic equations of state such as the phase-space density, the entropy per particle and the local pair correlation function.
description: 4 pages, 5 figures
Diodenlaser mit Hertz-Linienbreite für ein optisches Calcium-Frequenznormal
Creators: name: Stoehr, Hardo
Publisher: name: Hannover : Universität
Year: 2005
Subjects: subject: Diode laser
subject: frequency stabilization
subject: optical reference cavity
subject: optical frequency standard
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Properties of ultra-cool dwarfs with Gaia. An assessment of the accuracy for the temperature determination
Creators: name: Sarro, Luis M.
name: Berihuete, Angel
name: Carrion, Cesar
name: Barrado, David
name: Cruz, Patricia
name: Isasi, Yago
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We aimed to assess the accuracy of the Gaia teff and logg estimates as derived with current models and observations. We assessed the validity of several inference techniques for deriving the physical parameters of ultra-cool dwarf stars. We used synthetic spectra derived from ultra-cool dwarf models to construct (train) the regression models. We derived the intrinsic uncertainties of the best inference models and assessed their validity by comparing the estimated parameters with the values derived in the bibliography for a sample of ultra-cool dwarf stars observed from the ground. We estimated the total number of ultra-cool dwarfs per spectral subtype, and obtained values that can be summarised (in orders of magnitude) as 400000 objects in the M5-L0 range, 600 objects between L0 and L5, 30 objects between L5 and T0, and 10 objects between T0 and T8. A bright ultra-cool dwarf (with teff=2500 K and \logg=3.5 will be detected by Gaia out to approximately 220 pc, while for teff=1500 K (spectral type L5) and the same surface gravity, this maximum distance reduces to 10-20 pc. The RMSE of the prediction deduced from ground-based spectra of ultra-cool dwarfs simulated at the Gaia spectral range and resolution, and for a Gaia magnitude G=20 is 213 K and 266 K for the models based on k-nearest neighbours and Gaussian process regression, respectively. These are total errors in the sense that they include the internal and external errors, with the latter caused by the inability of the synthetic spectral models (used for the construction of the regression models) to exactly reproduce the observed spectra, and by the large uncertainties in the current calibrations of spectral types and effective temperatures.
description: 18 pages, 17 figures, accepted by Astronomy & Astrophysics
Realization of independent contacts in barrier-separated InAs/GaSb quantum wells
Creators: name: Wu, Xingjun
name: Wang, Jianhuan
name: Huang, Miaoling
name: Yan, Shili
name: Du, Rui-Rui
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: InAs/GaSb double quantum wells (QWs) separated by a 100 Å AlSb middle barrier are grown by molecular beam epitaxy. We report a nanofabrication technique that utilizes the surface Fermi level pinning position in InAs $[E_f^s(\rm InAs)]$ for realizing independent electric contacts to each well. In particular, separate ohmic contacts to the upper InAs quantum well are achieved by selectively etching down to the InAs, while contacts to the lower GaSb quantum well are obtained by the depletion method. For the latter, the upper InAs quantum well is locally pinched off by top etched trenches capped with a remaining 2-3 nm InAs layer. As a result of a relatively low $E_f^s(\rm InAs)$, applying a negative bias gate potential will create a conducting hole channel in GaSb, and hence a separate ohmic contact to the lower quantum well. This method is demonstrated with experiment and the support of a self-consistent band bending calculation. A number of experiments on separately probing Coulomb and tunnel-coupled InAs/GaSb systems now become accessible.
Zeitaufgelöster Transport und Randkanalspektroskopie im Regime des Quanten-Hall-Effekts
Creators: name: Sukhodub, Gennadiy
Publisher: name: Hannover : Universität
Year: 2005
Subjects: subject: Quantum Hall effect
subject: edge magnetoplasmons
subject: edge channels
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Charakterisierung der transkriptionellen Regulation des humanen Period 1-Gens (hPER1) in vitro
Creators: name: Motzkus, Dirk
Publisher: name: Hannover : Universität
Year: 2001
Subjects: subject: Circadian rhythms
subject: period 1
subject: signal-transduction
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Kalte Atome für die Quanteninformationsverarbeitung
Creators: name: Volk, Michael
Publisher: name: Hannover : Universität
Year: 2005
Subjects: subject: Quantum information
subject: atomic qubits
subject: decoherence
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
title: Электроматериаловедение
Creators: name: ELS IPR BOOKS
Publisher: name: Профобразование
Year: 2022

description: В практикуме изложены исследования электропроводности металлов, свойств полупроводниковых материалов, электропроводности диэлектриков. Показана методика проведения исследований поляризации диэлектриков, диэлектрических потерь в диэлектриках, пробоя диэлектриков, свойств магнитных материалов. Практикум предназначен для студентов всех профессий и специальностей среднего профессионального образования, учебными планами которых предусмотрено изучение дисциплин «Электроматериаловедение», «Основы электроматериаловедения», «Материаловедение», «Электротехнические материалы».
Computational study of flow dynamics from a dc arc plasma jet
Creators: name: Trelles, Juan Pablo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Mathematical Physics (math-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Plasma jets produced by direct-current (DC) non-transferred arc plasma torches, at the core of technologies ranging from spray coating to pyrolysis, present intricate dynamics due to the coupled interaction of fluid flow, thermal, and electromagnetic phenomena. The flow dynamics from an arc discharge plasma jet are investigated using time-dependent three-dimensional simulations encompassing the dynamics of the arc inside the torch, the evolution of the jet through the discharge environment, and the subsequent impingement of the jet over a flat substrate. The plasma is described by a chemical equilibrium and thermodynamic nonequilibrium (two-temperature) model. The numerical formulation of the physical model is based on a monolithic and fully-coupled treatment of the fluid and electromagnetic equations using a Variational Multiscale Finite Element Method. Simulation results uncover distinct aspects of the flow dynamics, including the jet forcing due to the movement of the electric arc, the prevalence of deviations between heavy-species and electron temperatures in the plasma fringes, the development of shear flow instabilities around the jet, the occurrence of localized regions with high electric fields far from the arc, and the formation and evolution of coherent flow structures.
description: 31 pages, 2 Tables, 9 figures. arXiv admin note: text overlap with arXiv:1301.0742
Production of $c \bar c c \bar c$ in double-parton scattering within $k_{t}$-factorization approach -- meson-meson correlations
Creators: name: Maciula, Rafal
name: Szczurek, Antoni
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We discuss production of two pairs of $c \bar c$ in proton-proton collisions at the LHC. Both double-parton scattering (DPS) and single-parton scattering (SPS) contributions are included in the analysis. Each step of DPS is calculated within $k_t$-factorization approach, i.e. effectively including next-to-leading order corrections. The conditions how to identify the DPS contribution are presented. The discussed mechanism unavoidably leads to the production of pairs of mesons: $D_i D_j$ (each containing $c$ quarks) or $\bar D_i \bar D_j$ (each containing $\bar c$ antiquarks). We calculate corresponding production rates for different combinations of charmed mesons as well as some differential distribution for $(D^0 D^0$ + $\bar D^0 \bar D^0)$ production. Within large theoretical uncertainties the predicted DPS cross section is fairly similar to the cross section measured recently by the LHCb collaboration. The best description is obtained with the Kimber-Martin-Ryskin (KMR) unintegrated gluon distribution, which very well simulates higher-order corrections. The contribution of SPS, calculated in the high-energy approximation, turned out to be rather small. Finally, we emphasize significant contribution of DPS mechanism to inclusive charmed meson spectra measured recently by ALICE, ATLAS and LHCb.
description: 15 pages, 12 figures
Monument to the memory of the victims of prison ships at Fort Greene, Brooklyn : March 27, 1888, committed to the Committee of the Whole House on the state of the Union and ordered to be printed : Mr. Maish, from the Committee on Military Affairs, submitted the following report
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 1888
Subjects: War memorials--New York (State)--New York--Anniversaries, etc.

description: Report on the Prison Ship Martyrs' Monument in Forte Greene Park
Entanglement in a multiverse with no common space-time
Creators: name: Robles-Pérez, S. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Inter-universal entanglement may even exist in a multiverse in which there is no common space-time among the universes. In particular, the entanglement between the expanding and contracting branches of the universe might have observable consequences in the dynamical and thermodynamical properties of one single branch, making therefore testable the whole multiverse proposal, at least in principle.
description: 4 pages. Prepared for the proceedings of the Multiverse and Fundamental Cosmology Meeting (Multicosmofun'12)
Next decade of sterile neutrino studies
Creators: name: Boyarsky, Alexey
name: Iakubovskyi, Dmytro
name: Ruchayskiy, Oleg
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We review the status of sterile neutrino dark matter and discuss astrophysical and cosmological bounds on its properties as well as future prospects for its experimental searches. We argue that if sterile neutrinos are the dominant fraction of dark matter, detecting an astrophysical signal from their decay (the so-called 'indirect detection') may be the only way to identify these particles experimentally. However, it may be possible to check the dark matter origin of the observed signal unambiguously using its characteristic properties and/or using synergy with accelerator experiments, searching for other sterile neutrinos, responsible for neutrino flavor oscillations. We argue that to fully explore this possibility a dedicated cosmic mission - an X-ray spectrometer - is needed.
description: 23 pages, 6 figures
Localized states in the conserved Swift-Hohenberg equation with cubic nonlinearity
Creators: name: Thiele, Uwe
name: Archer, Andrew J.
name: Robbins, Mark J.
name: Gomez, Hector
name: Knobloch, Edgar
Publisher: name: arXiv
Year: 2013
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The conserved Swift-Hohenberg equation with cubic nonlinearity provides the simplest microscopic description of the thermodynamic transition from a fluid state to a crystalline state. The resulting phase field crystal model describes a variety of spatially localized structures, in addition to different spatially extended periodic structures. The location of these structures in the temperature versus mean order parameter plane is determined using a combination of numerical continuation in one dimension and direct numerical simulation in two and three dimensions. Localized states are found in the region of thermodynamic coexistence between the homogeneous and structured phases, and may lie outside of the binodal for these states. The results are related to the phenomenon of slanted snaking but take the form of standard homoclinic snaking when the mean order parameter is plotted as a function of the chemical potential, and are expected to carry over to related models with a conserved order parameter.
description: 40 pages, 13 figures
Algebraic and Affine Pattern Avoidance
Creators: name: Denton, Tom
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We investigate various connections between the 0-Hecke monoid, Catalan monoid, and pattern avoidance in permutations, providing new tools for approaching pattern avoidance in an algebraic framework. In particular, we characterize containment of a class of `long' patterns as equivalent to the existence of a corresponding factorization. We then generalize some of our constructions to the affine setting.
description: Modified from a chapter of the author's dissertation, currently submitted for review for publication
Effect of annealing on the superconducting properties of a-Nb(x)Si(1-x) thin films
Creators: name: Crauste, O.
name: Gentils, A.
name: Couëdo, F.
name: Dolgorouky, Y.
name: Bergé, L.
name: Collin, S.
name: Marrache-Kikuchi, C. A.
name: Dumoulin, L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: a-Nb(x)Si(1-x) thin films with thicknesses down to 25 Å have been structurally characterized by TEM (Transmission Electron Microscopy) measurements. As-deposited or annealed films are shown to be continuous and homogeneous in composition and thickness, up to an annealing temperature of 500°C. We have carried out low temperature transport measurements on these films close to the superconductor-to-insulator transition (SIT), and shown a qualitative difference between the effect of annealing or composition, and a reduction of the film thickness on the superconducting properties of a-NbSi. These results question the pertinence of the sheet resistance R_square as the relevant parameter to describe the SIT.
description: 9 pages, 12 figures
Periodic Orbits in the Generalized Photogravitational Chermnykh-Like Problem with Power-law Profile
Creators: name: Kishor, Ram
name: Kushvah, Badam Singh
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences
subject: 70F07, 70F15

description: The orbits about Lagrangian equilibrium points are important for scientific investigations. Since, a number of space missions have been completed and some are being proposed by various space agencies. In light of this, we consider a more realistic model in which a disk, with power-law density profile, is rotating around the common center of mass of the system. Then, we analyze the periodic motion in the neighborhood of Lagrangian equilibrium points for the value of mass parameter $0
description: Accepted in APSS(Springer)
„So hört sich der Satzbau besser an“ : eine Untersuchung metasprachlichen Wissens von Schüler/innen verschiedener Schulformen und -stufen
Creators: name: Otten, Tina
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2021
Subjects: subject: Metasprachliches Wissen
subject: Metasprachliche Handlungen
subject: Verbalisierbarkeit von Wissen
subject: Sprachdidaktik
subject: Grammatik in der Schule
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::370 | Erziehung, Schul- und Bildungswesen

description: „Also, wenn man einen Satz hört, der sich für einen nicht richtig anhört, dann weiß man vielleicht nicht immer, was daran richtig falsch ist vom Grammatischen her, aber man weiß, dass es falsch ist und kann es auch korrigieren. Aber man weiß nicht direkt immer was jetzt direkt der Fehler daran war, aber man hört es irgendwie.“ Mit diesen Worten versucht ein Schüler des 7. Jahrgangs eines Gymnasiums, einen Satzbaufehler in einem Text näher zu erklären. Es wird deutlich, dass er sich zur Begründung seiner Schreibentscheidung in erster Linie auf seinen Höreindruck bzw. sein Sprachgefühl bezieht. Fachliche Begriffe und Konzepte aus dem schulischen Grammatikunterricht verwendet er hingegen nicht. Doch woran liegt das? Was wissen Schülerinnen und Schüler verschiedener Schulformen und Klassenstufen über Sprache? Welche Faktoren beeinflussen die Entwicklung ihres metasprachlichen Wissens? Und bietet fachsprachliches Wissen im Vergleich zu anderen Wissensformen überhaupt einen Mehrwert? Die vorliegende Arbeit geht diesen Fragen nach, indem metasprachliche Handlungen und das den Handlungen zugrunde liegende metasprachliche Wissen von Schülerinnen und Schülern in den Blick genommen werden. Dabei wird insbesondere das explizite metasprachliche Wissen der Lernenden untersucht, um aufzuzeigen, 1) welche unterschiedlichen Qualitäten explizites Wissen über Sprache bei Lernenden haben kann, 2) wie sich Schülerinnen und Schüler unter Berücksichtigung verschiedener innerer und äußerer Einflussfaktoren in Bezug auf ihr Wissen über Sprache voneinander unterscheiden und 3) wie sich unterschiedliche Formen expliziten Wissens über Sprache auf das metasprachliche Handeln von Lernenden auswirken. Empirisch untersucht werden diese Aspekte anhand einer Studie, die in vier verschiedenen Schulformen (Hauptschule, Realschule, Gymnasium, Berufsbildende Schule) und drei unterschiedlichen Jahrgangsstufen (7, 10, 12) sowie vier Seminargruppen der Universität durchgeführt wurde (n = 405).
Sagina procumbens
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: F.procumbens (Dunal) Gren. et Godr. (F. vulgaris Spach, Helianthemum Fumana [L.] Miller) Cat. 35und 422. Bis etwa 1510 m. l: Ob La Bätiaz (J.); Dorenaz (Garns). - 2: Föhrenwaldbei der Station Ardon (J.); unter der Kapelle St-Bernard ob Ardon (Binz); Chandolin (P.); ob Ayent (P.); Montana (Coquoz); Miege (Becherer); Salgesch (idem); Leuk-Guttet und Leuk-Getwing (idem); Niedergampel (Garns; Becherer und Schatzmann); Raron (P.). - 3: Vence (Guyot); Chemin (idem); Saxon (Miller); Riddes (J.); Iserables (Mantz); Briex (J.); Niouc (Sulger); Chippis (J.); Aren nördlich Visperterminen, etwa 1510 m (Beauverd).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Relationships between diffusion parameters and phosphorus precipitation during the POCl3 diffusion process
Creators: name: Dastgheib-Shirazi, Amir
name: Steyer, Michael
name: Micard, Gabriel
name: Wagner, Hannes
name: Altermatt, Pietro P.
name: Hahn, Giso
Publisher: name: Amsterdam : Elsevier
Year: 2013
Subjects: subject: Diffusion
subject: Emitter
subject: Precipitation
subject: PSG
subject: Solar Cells
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The POCl3 diffusion process is still a common way to create the pn-junction of Si solar cells. Concerning the screen-printing process, it is necessary to find a compromise between low emitter recombination, low contact resistance and high lateral conductivity. The formation of a homogeneous emitter during the POCl3 diffusion process depends on several diffusion parameters, including duration, temperature and gas flow. This primarily controls the growth of the highly doped phosphosilicate glass (PSG) layer, which acts as a dopant source during the diffusion process. Detailed investigations of the PSG layer have shown a distinct correlation between the process gas flows and the composition of the PSG layer. Specifically, in this research we examine the influence of phosphorus precipitation at the PSG/Si interface. Furthermore, we show the influence of phosphorus precipitation during the pre-deposition phase on the passivation quality of the corresponding emitter. In a second step, we use the results to create emitters with a reduced density of phosphorus precipitates. In a last step, the optimized emitter structure was transferred to screen-printed solar cell processes, whereby efficiencies up to 19.4% abs. were achieved on monocrystalline p-type Cz material with full area Al-BSF rear side.
Spacetime Transformations from a Uniformly Accelerated Frame
Creators: name: Friedman, Yaakov
name: Scarr, Tzvi
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Physics (physics.gen-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We use Generalized Fermi-Walker transport to construct a one-parameter family of inertial frames which are instantaneously comoving to a uniformly accelerated observer. We explain the connection between our approach and that of Mashhoon. We show that our solutions of uniformly accelerated motion have constant acceleration in the comoving frame. Assuming the Weak Hypothesis of Locality, we obtain local spacetime transformations from a uniformly accelerated frame $K'$ to an inertial frame $K$. The spacetime transformations between two uniformly accelerated frames with the same acceleration are Lorentz. We compute the metric at an arbitrary point of a uniformly accelerated frame.
description: 19 pages, one figure. arXiv admin note: substantial text overlap with arXiv:1105.0492
Cloud-Based Augmentation for Mobile Devices: Motivation, Taxonomies, and Open Challenges
Creators: name: Abolfazli, Saeid
name: Sanaei, Zohreh
name: Ahmed, Ejaz
name: Gani, Abdullah
name: Buyya, Rajkumar
Publisher: name: arXiv
Year: 2013
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Recently, Cloud-based Mobile Augmentation (CMA) approaches have gained remarkable ground from academia and industry. CMA is the state-of-the-art mobile augmentation model that employs resource-rich clouds to increase, enhance, and optimize computing capabilities of mobile devices aiming at execution of resource-intensive mobile applications. Augmented mobile devices envision to perform extensive computations and to store big data beyond their intrinsic capabilities with least footprint and vulnerability. Researchers utilize varied cloud-based computing resources (e.g., distant clouds and nearby mobile nodes) to meet various computing requirements of mobile users. However, employing cloud-based computing resources is not a straightforward panacea. Comprehending critical factors that impact on augmentation process and optimum selection of cloud-based resource types are some challenges that hinder CMA adaptability. This paper comprehensively surveys the mobile augmentation domain and presents taxonomy of CMA approaches. The objectives of this study is to highlight the effects of remote resources on the quality and reliability of augmentation processes and discuss the challenges and opportunities of employing varied cloud-based resources in augmenting mobile devices. We present augmentation definition, motivation, and taxonomy of augmentation types, including traditional and cloud-based. We critically analyze the state-of-the-art CMA approaches and classify them into four groups of distant fixed, proximate fixed, proximate mobile, and hybrid to present a taxonomy. Vital decision making and performance limitation factors that influence on the adoption of CMA approaches are introduced and an exemplary decision making flowchart for future CMA approaches are presented. Impacts of CMA approaches on mobile computing is discussed and open challenges are presented as the future research directions.
description: Accepted for Publication in IEEE Communications Surveys & Tutorials
Dynamics of multifrequency oscillator communities
Creators: name: Komarov, Maxim
name: Pikovsky, Arkady
Publisher: name: arXiv
Year: 2012
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We consider a generalization of the Kuramoto model of coupled oscillators to the situation where communities of oscillators having essentially different natural frequencies interact. General equations describing possible resonances between the communities' frequencies are derived. The mostly simple situation of three resonantly interacting groups is analyzed in details. We find conditions for the mutual coupling to promote or suppress synchrony in individual populations, and present examples where interaction between communities leads to their synchrony, or to a partially asynchronous state, or to a chaotic dynamics of order parameters.
description: 5 pages
An exercise on Gauss' law for gravitation: The Flat Earth model
Creators: name: Tort, A C
Publisher: name: arXiv
Year: 2013
Subjects: subject: Popular Physics (physics.pop-ph)
subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: We discuss the flat and hollow models of the Earth as a pedagogical example of the application of Gauss' law to the gravitational field.
description: 4 pages, Latex file. More typos corrected
Analysis of localization phenomena in weakly interacting disordered lattice gases
Creators: name: Schulte, T.
name: Drenkelforth, S.
name: Kruse, J.
name: Tiemeyer, R.
name: Sacha, K.
name: Zakrzewski, J.
name: Lewenstein, M.
name: Ertmer, Wolfgang
name: Arlt, Jan J.
Publisher: name: Bristol : IOP Publishing Ltd.
Year: 2006
Subjects: subject: systems
subject: bosons
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Disorder plays a crucial role in many systems particularly in solid state physics. However, the disorder in a particular system cannot usually be chosen or controlled. We show that the unique control available for ultracold atomic gases may be used for the production and observation of disordered quantum degenerate gases. A detailed analysis of localization effects for two possible realizations of a disordered potential is presented. In a theoretical analysis, clear localization effects are observed when a superlattice is used to provide a quasiperiodic disorder. The effects of localization are analysed by investigating the superfluid fraction and the localization length within the system. The theoretical analysis in this paper paves a clear path for the future observation of Anderson- like localization in disordered quantum gases.
Fumana ericoides Gandoger
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: F. ericoides (Cav.) Gandoger (F. Spachii Gren. et Godr., F. vulgaris ssp. ericoides Braun-Blanquet) Vgl. SchinzLit. 1909. 2:Fully-Saillon, 480-990 m (Garns); nordwestlich ob Ardon (Kunz); Sex de Gru zwischen Ardon und Chamoson (Terretaz und M. Mutrux); Granges-Lens (Beauverd); Siders (idem). - 3: Pfyn (R).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Determination of the collection diffusion length by electroluminescence imaging
Creators: name: Schinke, Carsten
name: Hinken, David
name: Bothe, Karsten
name: Ulzhöfer, Christian
name: Milsted, Ashley
name: Schmidt, Jan
name: Brendel, Rolf
Publisher: name: Amsterdam : Elsevier BV
Year: 2011
Subjects: subject: Collection diffusion length
subject: Electroluminescence imaging
subject: Crystalline silicon solar cells
subject: Diffusion length
subject: Electroluminescence emission
subject: Experimental evidence
subject: Multi-crystalline silicon solar cells
subject: Quantum Efficiency measurements
subject: Rear surfaces
subject: Relative accuracy
subject: Crystalline materials
subject: Diffusion
subject: Electroluminescence
subject: Energy gap
subject: Monocrystalline silicon
subject: Photovoltaic effects
subject: Polysilicon
subject: Silicon solar cells
subject: Light
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The electroluminescence emission of crystalline silicon solar cells at near-bandgap wavelengths is investigated. We show that the intensity of the emitted luminescence at near-bandgap wavelengths is directly proportional to the collection diffusion length Lc which is a measure of bulk and rear surface recombination properties and determines the short circuit current of a solar cell illuminated with light of near-bandgap wavelengths. We provide experimental evidence for the determination of Lc by carrying out electroluminescence measurements on a set of 15 specially prepared monocrystalline silicon solar cells with different thicknesses. Moreover, we demonstrate and discuss the applicability of the proposed method to obtain images of the collection diffusion length Lc of multicrystalline silicon solar cells. The values determined by electroluminescence imaging coincide with values obtained from spectrally resolved quantum efficiency measurements with a relative accuracy of 13 %.
Exchange-Correlation Energy from Pairing Matrix Fluctuation and the Particle-Particle Random Phase Approximation
Creators: name: van Aggelen, Helen
name: Yang, Yang
name: Yang, Weitao
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We formulate an adiabatic connection for the exchange-correlation energy in terms of pairing matrix fluctuation. This connection opens new channels for density functional approximations based on pairing interactions. Even the simplest approximation to the pairing matrix fluctuation, the particle-particle Random Phase Approximation (pp-RPA), has some highly desirable properties. It has no delocalization error with a nearly linear energy behavior for systems with fractional charges, describes van der Waals interactions similarly and thermodynamic properties significantly better than particle-hole RPA, and eliminates static correlation error for single-bond systems. Most significantly, the pp-RPA is the first known functional that has an explicit and closed-form dependence on the occupied and unoccupied orbitals and captures the energy derivative discontinuity in strongly correlated systems. These findings illlustrate the potential of including pairing interactions within a density functional framework.
title: Дифракция плоской волны на волноводной решетке Ван Атта, расположенной на поверхности идеально проводящего цилиндра
Creators: name: ., Ю. В. Юханов – д.т.н., профессор, гл. науч. сотрудник, зав. кафедрой антенн и радиопередающих устройств, Южный федеральный университет (г. Таганрог) E-mail: yu_yukhanov@mail.ru Т. Ю. Привалова – к.ф.-м.н., доцент, кафедра общей физики, Южный федеральный университет (г. Ростов-на-Дону) E-mail: tatyana.privalova@gmail.com Е. В. Крюк – аспирант, кафедра антенн и радиопередающих устройств, Южный федеральный университет (г. Таганрог) E-mail: evkryuk@sfedu.ru Ф. С. Топалов – аспирант, кафедра антенн и радиопередающих устройств, Южный федеральный университет (г. Таганрог) E-mail: fzzavod@yandex.ru И. В. Мерглодов – к.т.н., ассистент, кафедра антенн и радиопередающих устройств, Южный федеральный университет (г. Таганрог) E-mail: ivmerglodov@sfedu.ru
Publisher: name: Издательство Радиотехника
Year: 2019

description: Решена двумерная задача дифракции плоской волны на волноводной решетке Ван Атта, расположенной на поверхности кругового идеально проводящего цилиндра. Излучатели в виде открытых концов волноводов соединены плоскопараллельными волноводами.
Задача сведена к решению интегрального уравнения относительно вектора напряженности электрического поля в апертурах излучателей. Решение получено в предположении, что взаимосвязь между апертурами осуществляется только через соединяющие одномодовые тракты. Получены выражения для моностатических и бистатических диаграмм рассеяния, представленные через геометрические параметры конструкции. Точность полученных в работе приближенных формул проверена путем точного решения задачи рассеяния плоской волны на одноэлементной решетке с помощью пакета Ansoft HFSS.
Приведены результаты расчетов диаграмм отражения для решеток Ван Атта с различным числом излучателей, расположенных на цилиндрах различных электрических размеров. Дана оценка соотношения между антенной и структурной составляющими рассеянного поля.
On massless and spinless particles with varying speed
Creators: name: Kruglov, S. I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The wave equation for spin-0 massless particles with the Lorentz violating term leading to varying speed of particles is considered. This equation is represented as the first-order 6$\times$6 matrix equation. Solutions of the equation in the form of projection matrix are obtained. The Schrödinger form of the equation is obtained and the quantum-mechanical Hamiltonian is found.
description: 9 pages, no figures, to appear in EPL
title: Двухдиапазонная совмещенная ОВЧ/УВЧ антенная система авиационного мониторинга земной поверхности
Creators: name: ., А. Ю. Гринев – д.т.н., профессор, кафедра «Радиофизика, антенны и микроволновая техника», Московский авиационный институт (национальный исследовательский университет) E-mail: grinevau@yandex.ru А. А. Измайлов – аспирант, кафедра «Радиофизика, антенны и микроволновая техника», Московский авиационный институт (национальный исследовательский университет); инженер 1 категории, ПАО «НПО «Алмаз» (Москва) E-mail: yustas1993@yandex.ru А. П. Волков – к.т.н., ст. науч. сотрудник, АО «Концерн «Вега» (Москва) E-mail: tkoh@yandex.ru
Publisher: name: Издательство Радиотехника
Year: 2019

description: Представлено техническое решение совмещения двух разнесенных диапазонов ОВЧ и УВЧ в одной радиочастотной аппаратуре с применением частотно-селективных структур (ЧСС), обладающих свойствами искусственного магнитного проводника (AMC).
Важной особенностью такой системы является выполнение ЧСС роли режекторного фильтра (полосно-пропускающего для АР ОВЧ-диапазона и полосно-заграждающего для АР УВЧ-диапазона), позволяющего существенно снизить поперечный размер АС и уменьшить взаимное влияние диапазонов. В УВЧ-диапазоне ЧСС является металлическим экраном, при этом излучатели УВЧ-диапазона располагаются над экраном на расстоянии λувч/4. Для ОВЧ-диапазона ЧСС обладают свойствами поверхности с высоким импедансом (поскольку касательная компонента магнитного поля равна нулю), реализующие коэффициент отражения +1. Недостатком такой схемы является противоречивые требования к ЧСС, а также в искажении ДН АР ОВЧ-диапазона АР УВЧ-диапазона.
ผลของระยะเวลาในการงอกต่อปริมาณสารประกอบฟีนอลิกทั้งหมด ฤทธิ์การต้านอนุมูลอิสระและไฟโตสเตอรอลในข้าวไทยบางชนิด
Creators: name: วีระชาติ นันตะเวช
Publisher: name: คณะเทคโนโลยีการเกษตร มหาวิทยาลัยราชภัฏมหาสารคาม
Year: 2023
Subjects: เวลา
การงอก
สารออกฤทธิ์ทางชีวภาพ
ข้าวกล้อง

description: วารสารเกษตรพระวรุณ, 20, 2, 92-97
VLT/XSHOOTER & Subaru/MOIRCS Spectroscopy of HUDF-YD3: No Evidence for Lyman-alpha Emission at z=8.55
Creators: name: Bunker, Andrew J.
name: Caruana, Joseph
name: Wilkins, Stephen M.
name: Stanway, Elizabeth R.
name: Lorenzoni, Silvio
name: Lacy, Mark
name: Jarvis, Matt J.
name: Hickey, Samantha
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present spectroscopic observations with VLT/XSHOOTER and Subaru/MOIRCS of a relatively bright Y-band drop-out galaxy in the Hubble Ultra Deep Field, first selected by Bunker et al. (2010), McLure et al. (2010) and Bouwens et al. (2010) to be a likely z~8-9 galaxy on the basis of its colours in the HST ACS and WFC3 images. This galaxy, HUDF.YD3 (also known as UDFy-38135539) has been targetted for VLT/SINFONI integral field spectroscopy by Lehnert et al. (2010), who published a candidate Lyman-alpha emission line at z=8.55 from this source. In our independent spectroscopy using two different infrared spectrographs (5 hours with VLT/XSHOOTER and 11 hours with Subaru/MOIRCS) we are unable to reproduce this line. We do not detect any emission line at the spectral and spatial location reported in Lehnert et al. (2010), despite the expected signal in our combined MOIRCS & XSHOOTER data being 5-sigma. The line emission also seems to be ruled out by the faintness of this object in recently extremely deep F105W (Y-band) HST/WFC3 imaging from HUDF12; the line would fall within this filter and such a galaxy should have been detected at Y(AB)=28.6mag (~20 sigma) rather than the marginal Y(AB)~30mag observed in the Y-band image, >3 times fainter than would be expected if the emission lie was real. Hence it appears highly unlikely that the reported Lyman-alpha line emission at z>8 is real, meaning that the highest-redshift sources for which Lyman-alpha emission has been seen are at z=6.9-7.2. It is conceivable that Lyman-alpha does not escape galaxies at higher redshifts, where the Gunn-Peterson absorption renders the Universe optically thick to this line. However, deeper spectroscopy on a larger sample of candidate z>7 galaxies will be needed to test this.
description: Accepted for publication in MNRAS
title: Сканирующие антенны вытекающей волны КВЧ-диапазона
Creators: name: ., М. А. Галуза – адъюнкт, Воронежский институт МВД России E-mail: q0mezon@gmail.com А. И. Климов – д.т.н., доцент, профессор кафедры инфокоммуникационных систем и технологий, Воронежский институт МВД России E-mail: alexserkos@inbox.ru А. В. Кузнецов – генеральный директор, АО «Воронежское центральное конструкторское бюро «Полюс» E-mail: polus@vckb.ru Ю. Б. Нечаев – Засл. деятель науки РФ, д.ф.-м.н., профессор, профессор кафедры информационных систем, Воронежский государственный университет E-mail: nechaev_ub@mail.ru
Publisher: name: Издательство Радиотехника
Year: 2019

description: Представлены результаты компьютерного моделирования и анализа характеристик сканирующих антенн вытекающей волны с последовательным и параллельно-последовательным возбуждением КВЧ-диапазона.
Показано, что антенна с параллельно-последовательным (центральным) возбуждением обеспечивает однокоординатное фазовое сканирование в пределах углового сектора не менее ±20°. Для обеспечения однокоординатного фазового сканирования ДН многовходовой АВВ с центральным возбуждением ее конструктивные параметры должны быть такими, чтобы при синфазном возбуждении входов в рабочей полосе частот обе подрешетки антенны создавали наклонное излучение в направлениях краев раскрыва в Е-плоскости под углом, не превышающим половину ширины диаграммы направленности подрешетки, причем минимальная рабочая частота антенны должна быть не менее частоты резонансной дифракции Брэгга второго порядка (то есть частоты, на которой должно происходить излучение вдоль нормали к апертуре антенны).
Предполагаемые области применения – аппаратура беспроводных систем передачи информации, охранные устройства и ав-томобильные радары.
Engaging at the science-policy interface as an early-career researcher: experiences and perceptions in biodiversity and ecosystem services research
Creators: name: Filyushkina, Anna
name: Ryu, Hyeonju
name: Kadykalo, Andrew N.
name: Murali, Ranjini
name: Campagne, C. Sylvie
name: Washbourne, Carla-Leanne
name: Peter, Sophie
name: Saidi, Nada
name: Sarzynski, Thuan
name: Fontanella Pisa, Paola
name: Ávila-Flores, Giovanni
name: Amiar, Taha
Publisher: name: London [u.a.] : Taylor & Francis
Year: 2022
Subjects: subject: Barriers
subject: boundary organizations
subject: IPBES
subject: opportunities
subject: outcomes
subject: Sander Jacobs
subject: young scholars
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: Effective knowledge exchange at science-policy interfaces (SPIs) can foster evidence-informed policy-making through the integration of a wide range of knowledge inputs. This is especially crucial for conservation and sustainable use of biodiversity and ecosystem services (ES), human well-being and sustainable development. Early-career researchers (ECRs) can contribute significantly to knowledge exchange at SPIs. Recognizing that, several capacity building programs focused on sustainability have been introduced recently. However, little is known about the experiences and perceptions of ECRs in relation to SPIs. Our study focused on SPI engagement of ECRs who conduct research on biodiversity and ES, as perceived and experienced. Specifically, we addressed ‘motivations’, ‘barriers’ and ‘opportunities and ‘benefits’. A total of 145 ECRs have completed the survey. Our results showed that ECRs were generally interested to engage in SPIs and believed it to be beneficial in terms of contributing to societal change, understanding policy processes and career development. Respondents perceived lack of understanding about involvement channels, engagement opportunities, funding, training, perceived credibility of ECRs by other actors and encouragement of senior colleagues as barriers to engaging in SPIs. Those who have already participated in SPIs generally saw fewer barriers and more opportunities. A key reason for dissatisfaction with experience in SPIs was a lack of impact and uptake of science-policy outputs by policymakers–an issue that likely extends beyond ECRs and implies the need for transformations in knowledge exchange within SPIs. In conclusion, based on insights from our survey, we outline several opportunities for increased and better facilitation of ECR engagement in SPIs. © 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
Epistemic Beliefs in Science—A Systematic Integration of Evidence From Multiple Studies
Creators: name: Schiefer, Julia
name: Edelsbrunner, Peter A.
name: Bernholt, Andrea
name: Kampa, Nele
name: Nehring, Andreas
Publisher: name: Dordrecht [u.a.] : Springer Science + Business Media B.V
Year: 2022
Subjects: subject: Development
subject: Epistemic beliefs
subject: Latent profile analysis
subject: Primary school
subject: Secondary school
subject: Dewey Decimal Classification::100 | Philosophie::150 | Psychologie
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::370 | Erziehung, Schul- und Bildungswesen

description: Recent research has integrated developmental and dimensional perspectives on epistemic beliefs by implementing an approach in which profiles of learners’ epistemic beliefs are modeled across multiple dimensions. Variability in study characteristics has impeded the comparison of profiles of epistemic beliefs and their relations with external variables across studies. We examined this comparability by integrating data on epistemic beliefs about the source, certainty, development, and justification of knowledge in science from six studies comprising N = 10,932 German students from elementary to upper secondary school. Applying latent profile analyses to these data, we found that profiles of epistemic beliefs that were previously conceptualized were robust across multiple samples. We found indications that profiles of epistemic beliefs homogenize over the course of students’ education, are related to school tracking, and demonstrate robust relations with students’ personal characteristics and socioeconomic background. We discuss implications for the theory, assessment, and education of epistemic beliefs. © 2022, The Author(s).