cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the performance of optical phased array technology for beam steering
Creators: name: Lesina, Antonio Cala'
name: Goodwill, Dominic
name: Bernier, Eric
name: Ramunno, Lora
name: Berini, Pierre
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Optics (physics.optics)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: Optical phased arrays are of strong interest for beam steering in telecom and LIDAR applications. A phased array ideally requires that the field produced by each element in the array (a pixel) is fully controllable in phase and amplitude (ideally constant). This is needed to realize a phase gradient along a direction in the array, and thus beam steering in that direction. In practice, grating lobes appear if the pixel size is not sub-wavelength, which is an issue for many optical technologies. Furthermore, the phase performance of an optical pixel may not span the required $2π$ phase range, or may not produce a constant amplitude over its phase range. These limitations result in imperfections in the phase gradient, which in turn introduce undesirable secondary lobes. We discuss the effects of non-ideal pixels on beam formation, in a general and technology-agnostic manner. By examining the strength of secondary lobes with respect to the main lobe, we quantify beam steering quality, and make recommendations on the pixel performance required for beam steering within prescribed specifications. By applying appropriate compensation strategies, we show that it is possible to realize high-quality beam steering even when the pixel performance is non-ideal, with intensity of the secondary lobes be two orders of magnitude smaller than the main lobe.
description: 19 pages, 10 figures, 3 movies and 1 Python code
Improving the design of agri-environmental policies: a case study in Italy
Creators: name: Bazzani, Guido Maria
name: Viaggi, Davide
name: Bazzani, Guido Maria
name: Viaggi, Davide
Publisher: name: Unknown
Year: 2004
Subjects: Environmental Economics and Policy

description: The application of agri-environmental policies (reg. EEC 2078/92 and reg. EU 1257/99) has produced a wide literature about the best policy design options. The data arising from the first ex post evaluation exercises have contributed only partially to the discussion about how such measures should be implemented. This paper simulates the results of different policy design options under adverse selection and moral hazard using data obtained from the monitoring of regulation 2078/92 in Emilia-Romagna (Italy). The results show the interplay between policy instruments, monitoring costs and payments. As a consequence a more consistent design of such policy parameters is required.
The Spectral Energy Distribution of CO lines in M82
Creators: name: Weiss, A.
name: Walter, F.
name: Scoville, N. Z.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an analysis of the excitation conditions of the molecular gas in the streamers and the outflow of M82 based on observations obtained at the IRAM 30m telescope. Our analysis of J=1-0 and J=2-1 transitions of CO and 13CO and the CO(3-2) line in 13 regions outside the central starburst disk shows that the gas density within the streamer/outflow system is about an orderof magnitude lower (n(H2) ~ 10^3 cm^-3) than in the central molecular disk. We have used an LVG model and data from the literature to constrain the flux density in each CO transition (the `CO line SED') arising from the streamer/outflow system and the central starburst disk itself. Globally, we find that the CO flux density up to the J=3-2 line is dominated by the diffuse outer regions while lines above the J=5-4 transition are almost exclusively emitted by the central starburst disk. We compare the CO line SED of M82 to CO observations of galaxies at high redshift and suggest that small high-J/low-J CO flux density ratios (observed in some of these sources) are not necessarily caused by a different excitation of the central molecular gas concentration, but may result from an additional, more extended and diffuse gas reservoir around these systems, reminiscent of the situation in M82.
description: 12 pages, 7 figures, accepted by A&A
Application of a Model for Evaluating the Environmental Sustainability of Cultures in Hill and Mountain Areas: The Case of Berries and Fruit Chestnuts in Northern Italy
Creators: name: Pirazzoli, Carlo
name: Castellini, Alessandra
name: Pirazzoli, Carlo
name: Castellini, Alessandra
Publisher: name: Unknown
Year: 2000
Subjects: Farm Management

description: This study proposes to evaluate the environmental sustainability of certain productive processes, which may be of interest for the enhancement, and economic development of specific hill and mountain areas of northern Italy. In order to make a comprehensive appraisal of the impact of the various activities in each geographical context, we adopted a methodology based on AHP multicriteria analysis. In particular, this method was applied to the cultivation of berries and fruit chestnut, also with reference to alternative cultures already consolidated in the areas under investigation
Non-Convex Stochastic Composite Optimization with Polyak Momentum
Creators: name: Gao, Yuan
name: Rodomanov, Anton
name: Stich, Sebastian
Publisher: name: CISPA
Year: 2024

description: The stochastic proximal gradient method is a powerful generalization of the
widely used stochastic gradient descent (SGD) method and has found numerous
applications in Machine Learning. However, it is notoriously known that this
method fails to converge in non-convex settings where the stochastic noise is
significant (i.e. when only small or bounded batch sizes are used). In this
paper, we focus on the stochastic proximal gradient method with Polyak
momentum. We prove this method attains an optimal convergence rate for
non-convex composite optimization problems, regardless of batch size.
Additionally, we rigorously analyze the variance reduction effect of the Polyak
momentum in the composite optimization setting and we show the method also
converges when the proximal step can only be solved inexactly. Finally, we
provide numerical experiments to validate our theoretical results.
[Letter from Anna Antoinette Weber van Bosse]
Creators: name: Weber Van Bosse, Anna Antoinette
Publisher: name: Unknown
Year: 1902
Subjects: Yendo, Kichisaburo
Heydrich, Franz

description: Sending a box containing Lithothamnia and various slides of Archaeolithothamnion erythraeum, fossil material from the East Indian archipelago and material from Heydrich. Has made arrangements for various specimens of Lithothamnion moluccense, Archaeolithothamnion erythraeum, L. erubescens, L. reinboldii and L. pulchrum to be photographed. She offers a photograph of any specimen wanted. Asks for the paper by Kichisaburo Yendo.
Sexualität und Sexualbegleitung aus Sicht von Fachpersonen der Sozialen Arbeit: Forschungsarbeit über die Sichtweisen der Fachpersonen im Hinblick auf Sexualität und Sexualbegleitung von Menschen mit kognitiven Beeinträchtigungen im institutionellen Kontext
Creators: name: Gasseling, Lynne
name: Hörndli, Nadine
Publisher: name: Zenodo
Year: 2020

description: Sexualität ist ein Grundbedürfnis aller Menschen und wird auf individuellste Art und Weise gelebt. Das Ausleben von Sexualität ist für Menschen mit kognitiven Beeinträchtigungen, oftmals mit Herausforderungen verbunden. Sexualbegleitung stellt ein mögliches Angebot dar, um zu einer individuell befriedigenden Sexualität beizutragen. Es wird untersucht, wie Fachpersonen der Sozialen Arbeit zur Thematik Sexualität und dem Angebot einer Sexualbegleitung stehen. In Experteninterviews wurden dazu acht Fachpersonen befragt, welche im institutionellen Kontext mit erwachsenen Personen mit kognitiven Beeinträchtigungen zusammenarbeiten. In dieser qualitativen Forschung standen die persönlichen Haltungen der Fachpersonen und ihre daraus abgeleiteten Arbeitsweisen im Fokus. Die Komplexität der Thematiken Sexualität, sexuelle Dienstleistungen, kognitive Beeinträchtigungen und institutioneller Kontext und die Bedingtheit dieser untereinander wurden deutlich. Daraus ergab sich für die Fachpersonen die Wichtigkeit einer Leitlinie, durch eine klar kommunizierte institutionelle Haltung einerseits und einen Konsens innerhalb der Teams über die Begleitung der Klientel in ihrer Sexualität andererseits. Weiter liess sich feststellen, dass Sexualbegleitung als ein wichtiges und interessantes Angebot betrachtet wurde, der Fokus der Fachpersonen aber tendenziell auf der Partnersuche ihrer Klientel lag. Für die zukünftige Praxis der Sozialen Arbeit könnte die Investition in Aus- und Weiterbildungen, Zeitressourcen und Gefässen, in welchen Themen rund um Sexualität im Fokus stehen, positive Auswirkungen auf die Lebensqualität für Menschen mit kognitiven Beeinträchtigungen haben.
description: + Code Diss LU: hslusa basp be 2020 + Fussnote: Bachelorarbeit, Hochschule Luzern - Soziale Arbeit, Ausbildungsgang Sozialpädagogik 2020 + NL-Code: NLLUHSA202002
Food Market Value Analysis: Product Quality Improvement, Product Origin Protection and Timing Decisions in Apple Market
Creators: name: Karipidis, Philippos I.
name: Galanopoulos, Konstantinos
name: Karipidis, Philippos I.
name: Galanopoulos, Konstantinos
Publisher: name: Unknown
Year: 2000
Subjects: Food Consumption/Nutrition/Food Safety
Industrial Organization

description: In an effective quality enhancement programme of fruit production and marketing, total quality firms must include consideration of those attributes that are important to customers. In this study the hedonic model is adopted, in order to examine the effects of product quality, region of origin and time of product availability on the price structure determination in the apple market in Greece. Results suggest increased marginal shadow values (customers' interest) for physical product quality and for product origin - particularly in the case of Volos region. There is no evidence that out-of-season time is an important factor determining product prices. Further, it is also shown that it is possible to use the hedonic analysis for the estimation of shadow value for some sales quality characteristics other than the physical ones.
Intersecting Brane Worlds at One Loop
Creators: name: Abel, Steven A.
name: Goodsell, Mark D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop techniques for one-loop diagrams on intersecting branes. The one-loop propagator of chiral intersection states on D6 branes is calculated exactly and its finiteness is shown to be guaranteed by RR tadpole cancellation. The result is used to demonstrate the expected softening of power law running of Yukawa couplings at the string scale. We also develop methods to calculate arbitrary N-point functions at one-loop, including those without gauge bosons in the loop. These techniques are also applicable to heterotic orbifold models.
description: 35 pages, 3 figures; added reference, corrected typos, JHEP style
Overcoming decoherence of cat-states formed in a cavity using squeezed-state inputs
Creators: name: Teh, R. Y.
name: Drummond, P. D.
name: Reid, M. D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A cat-state is a superposition of two coherent states with amplitudes $α_{0}$ and $-α_{0}$. Recent experiments create cat states in a microwave cavity field using superconducting circuits. As with degenerate parametric oscillation (DPO) in an adiabatic and highly nonlinear limit, the states are formed in a signal cavity mode via a two-photon dissipative process induced by the down conversion of a pump field to generate pairs of signal photons. The damping of the signal and the presence of thermal fluctuations rapidly decoheres the state, and the effect on the dynamics is to either destroy the possibility of a cat state, or else to sharply reduce the lifetime and size of the cat-states that can be formed. In this paper, we study the effect on both the DPO and microwave systems of a squeezed reservoir coupled to the cavity. While the threshold nonlinearity is not altered, we show that the use of squeezed states significantly lengthens the lifetime of the cat states. This improves the feasibility of generating cat states of large amplitude and with a greater degree of quantum macroscopic coherence, which is necessary for many quantum technology applications. Using current experimental parameters for the microwave set-up, which requires a modified Hamiltonian, we further demonstrate how squeezed states enhance the quality of the cat states that could be formed in this regime. Squeezing also combats the significant decoherence due to thermal noise, which is relevant for microwave fields at finite temperature. By modeling a thermal squeezed reservoir, we show that the thermal decoherence of the dynamical cat states can be inhibited by a careful control of the squeezing of the reservoir. To signify the quality of the cat state, we consider different signatures including fringes and negativity, and the $C_{l_{1}}$ measure of quantum coherence.
[Letter from Anna Antoinette Weber van Bosse]
Creators: name: Weber Van Bosse, Anna Antoinette
Publisher: name: Unknown
Year: 1902

description: Expresses gratitude for his willingness to identify the Lithothamnia. She agrees with the idea of keeping the Corallinaceae together and publishing them in one volume. She is collecting types of Amphiroa and thinks it is a difficult genus. She is sending a Melobesia found on a red alga, and all the slides of fossil forms she is able to get.
DYNAMICS OF LEARNING - A MULTIFACETED EXPLORATION OF JAPANESE FORMAL EDUCATION FROM EARLY CHILDHOOD TO ELEMENTARY SCHOOL
Creators: name: Brandl, Edenilson
Publisher: name: Zenodo
Year: 2024

description: This comprehensive exploration delves into the nuanced landscape of formal education in Japan, traversing the realms of early childhood to elementary school. The article elucidates the multifaceted approach undertaken by educators, emphasizing the intentional cultivation of skills, cognitive development, and socioemotional competencies. Government initiatives, collaborative efforts, and adaptive strategies in response to crises are highlighted, showcasing Japan's commitment to holistic and innovative education. The narrative unfolds through various lenses, including technology integration, literacy development, and the promotion of cultural diversity. Ultimately, this article seeks to provide a holistic understanding of Japan's educational paradigm, where the fusion of tradition and innovation converges to shape a dynamic and adaptable learning experience for students.

 

Diese umfassende Untersuchung befasst sich mit der differenzierten Landschaft der formalen Bildung in Japan und reicht von der frühen Kindheit bis zur Grundschule. Der Artikel erläutert den vielschichtigen Ansatz von Pädagogen und betont die gezielte Förderung von Fähigkeiten, kognitiver Entwicklung und sozioemotionalen Kompetenzen. Regierungsinitiativen, Kooperationsbemühungen und Anpassungsstrategien als Reaktion auf Krisen werden hervorgehoben und zeigen Japans Engagement für ganzheitliche und innovative Bildung. Die Erzählung entfaltet sich durch verschiedene Aspekte, darunter Technologieintegration, Alphabetisierungsentwicklung und die Förderung kultureller Vielfalt. Letztendlich soll dieser Artikel ein ganzheitliches Verständnis des japanischen Bildungsparadigmas vermitteln, in dem die Verschmelzung von Tradition und Innovation zu einer dynamischen und anpassungsfähigen Lernerfahrung für Schüler führt.
Leibliche Kinder von Pflegeeltern: Eine kleine Forschungsarbeit
Creators: name: Douglas, Alison Kim
Publisher: name: Zenodo
Year: 2020

description: In Pflegefamilien wachsen Pflegekinder oftmals mit den leiblichen Kindern der Pflegeeltern auf. Das Aufwachsen mit einem Pflegegeschwister bringt Chancen und Risiken mit sich. Zu leiblichen Kindern von Pflegeeltern gibt es jedoch wenig Literatur und Forschung. Deshalb beschäftigt sich diese Bachelorarbeit mit der Fragestellung: Welchen Auftrag haben Fachpersonen der Sozialen Arbeit bei der Begleitung einer Pflegefamilie gegenüber den leiblichen Kindern von Pflegeeltern? Im Theorieteil beschäftigt sich die Arbeit mit den Besonderheiten des Aufwachsens mit einem Pflegegeschwister. Für die Beantwortung der Forschungsfrage wurden fünf ehemalige leibliche Kinder zu ihren Erfahrungen zum familiären Zusammenleben mit einem Pflegegeschwister und ihrer Einschätzung nach einem Unterstützungsbedarf für leibliche Kinder befragt. Die Interviews wurden anhand eines Interviewleitfadens durchgeführt. Die Bearbeitung der Interviews erfolgte anhand des sechsstufigen Verfahrens nach Claus Mühlfeld, Paul Windolf, Norbert Lampert und Heidi Krüger. Die Forschungsergebnisse zeigen auf, dass das Aufwachsen mit Pflegegeschwistern sowohl po-sitive wie auch herausfordernde Erfahrungen mit sich bringt. Für die leiblichen Kinder von Pfle-geeltern besteht ein Unterstützungsbedarf, den die Soziale Arbeit leisten kann. Dieser betrifft die Schaffung von Partizipationsmöglichkeiten, das Anbieten und Einfordern von beratenden Ge-sprächen und das Erkennen von persönlichen Bedürfnissen der leiblichen Kinder. Es gilt für Fach-personen der Sozialen Arbeit, den Beitrag, den leibliche Kinder in Pflegefamilien leisten, wahr-zunehmen und wertzuschätzen.
description: + Code Diss LU: hslusa basp be 2020 + Fussnote: Bachelorarbeit, Hochschule Luzern - Soziale Arbeit, Ausbildungsgang Sozialpädagogik 2020 + NL-Code: NLLUHSA202002
[Letter from Anna Antoinette Weber van Bosse]
Creators: name: Weber Van Bosse, Anna Antoinette
Publisher: name: Unknown
Year: 1902

description: Has enclosed a list of answers to questions concerning various species. Has sent Archaeolithothamnion schmidtii or A. erythraeum, Lithothamnion erubescens f. haingsisiana and L. moluccense. Says that Heydrich called the specimen Lithophyllum orthoblastum.
description: Enclosed is a three pages list of names and information about fourteen specimens. The list has handwritten comments on it.
Optimization of Signal Significance by Bagging Decision Trees
Creators: name: Narsky, I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: An algorithm for optimization of signal significance or any other classification figure of merit suited for analysis of high energy physics (HEP) data is described. This algorithm trains decision trees on many bootstrap replicas of training data with each tree required to optimize the signal significance or any other chosen figure of merit. New data are then classified by a simple majority vote of the built trees. The performance of this algorithm has been studied using a search for the radiative leptonic decay B->gamma l nu at BaBar and shown to be superior to that of all other attempted classifiers including such powerful methods as boosted decision trees. In the B->gamma e nu channel, the described algorithm increases the expected signal significance from 2.4 sigma obtained by an original method designed for the B->gamma l nu analysis to 3.0 sigma.
description: 8 pages, 2 figures, 1 table
Observing the Invisible: Live Cache Inspection for High-Performance Embedded Systems
Creators: name: Tarapore, Dharmesh
name: Roozkhosh, Shahin
name: Brzozowski, Steven
name: Mancuso, Renato
Publisher: name: arXiv
Year: 2020
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: The vast majority of high-performance embedded systems implement multi-level CPU cache hierarchies. But the exact behavior of these CPU caches has historically been opaque to system designers. Absent expensive hardware debuggers, an understanding of cache makeup remains tenuous at best. This enduring opacity further obscures the complex interplay among applications and OS-level components, particularly as they compete for the allocation of cache resources. Notwithstanding the relegation of cache comprehension to proxies such as static cache analysis, performance counter-based profiling, and cache hierarchy simulations, the underpinnings of cache structure and evolution continue to elude software-centric solutions. In this paper, we explore a novel method of studying cache contents and their evolution via snapshotting. Our method complements extant approaches for cache profiling to better formulate, validate, and refine hypotheses on the behavior of modern caches. We leverage cache introspection interfaces provided by vendors to perform live cache inspections without the need for external hardware. We present CacheFlow, a proof-of-concept Linux kernel module which snapshots cache contents on an NVIDIA Tegra TX1 SoC (system on chip).
Direct observation of domain-wall configurations transformed by spin currents
Creators: name: Klaui, M.
name: Jubert, P. -O.
name: Allenspach, R.
name: Bischof, A.
name: Bland, J. A. C.
name: Faini, G.
name: Rudiger, U.
name: Vaz, C. A. F.
name: Vila, L.
name: Vouille, C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Direct observations of current-induced domain-wall propagation by spin-polarized scanning electron microscopy are reported. Current pulses move head-to-head as well as tail-to-tail walls in sub-micrometer Fe_{20}Ni_{80} wires in the direction of the electron flow, and a decay of the wall velocity with the number of injected current pulses is observed. High-resolution images of the domain walls reveal that the wall spin structure is transformed from a vortex to a transverse configuration with subsequent pulse injections. The change in spin structure is directly correlated with the decay of the velocity.
description: 5 pages, 3 figures
One-band Hubbard model with hopping asymmetry and the effective theory at finite U: Phase diagram and metal-insulator transition
Creators: name: Wen, Yuchuan
name: Yu, Yue
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the one-band Hubbard model at half filling with hopping asymmetry and its effective model at finite but large U up to the second order of tmix/U. Two variational wave functions, the resonating valence bond (RVB) wave function and antiferromagnetic (AF) RVB coexisted wave function, are studied by variational Monte Carlo method on L*L square lattices up to L=12. Based on these two wave functions, the phase diagrams for both models are presented. For the Hubbard model, we find that there is a metal-insulator transition when the hopping parameter tmix which changes the local double occupant vanishes while only a metal-insulator crossover is explored for any finite tmix. For the effective model in which the perturbation expansion is up to the second order of tmix/U, a clear metal-insulator transition can be identified for both variational wave functions and the phase diagram can be drawn accordingly. In both models, we find that the systems are dominated by AF-RVB wave function when U is large while the RVB wave function is favored when U is small.
description: 15pages,9figures
Real Space Raman Spectroscopy of Graphene Isotope Superlattices
Creators: name: Whiteway, Eric
name: Lee, Martin
name: Hilke, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the Raman spectroscopy of 12C/13C graphene isotope superlattices synthesized by chemical vapour deposition. At large periods the Raman spectra corresponds to the sum of the bulk 12C and 13C contributions. However, at small periods we observe the formation of mixed 12C/13C modes for Raman processes that involve two phonons, which results in the tripling of the 2D and 2D' Raman peaks. This tripling can be well understood in the framework of real space Raman spectroscopy, where the two emitted phonons stem from different regions of the superlattice. The intensity of the mixed peak increases as the superlattice half period approaches the mean free path of the photo-excited electron-hole pairs. By varying the superlattice period between 6 and 225 nm we have a direct measure of the photo-excited electron mean free path, which was found to be 18 nm for suspended graphene and 7 nm for graphene on SiO2 substrates.
Recovering $λ_R$ and $V/σ$ from seeing-dominated IFS data
Creators: name: Harborne, K. E.
name: van de Sande, J.
name: Cortese, L.
name: Power, C.
name: Robotham, A. S. G.
name: Lagos, C. D. P.
name: Croom, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Observers experience a series of limitations when measuring galaxy kinematics, such as variable seeing conditions and aperture size. These effects can be reduced using empirical corrections, but these equations are usually applicable within a restrictive set of boundary conditions (e.g. Sérsic indices within a given range) which can lead to biases when trying to compare measurements made across a full kinematic survey. In this work, we present new corrections for two widely used kinematic parameters, $λ_R$ and $V/σ$, that are applicable across a broad range of galaxy shapes, measurement radii and ellipticities. We take a series of mock observations of N-body galaxy models and use these to quantify the relationship between the observed kinematic parameters, structural properties and different seeing conditions. Derived corrections are then tested using the full catalogue of galaxies, including hydro-dynamic models from the EAGLE simulation. Our correction is most effective for regularly-rotating systems, yet the kinematic parameters of all galaxies -- fast, slow and irregularly rotating systems -- are recovered successfully. We find that $λ_R$ is more easily corrected than $V/σ$, with relative deviations of 0.02 and 0.06 dex respectively. The relationship between $λ_R$ and $V/σ$, as described by the parameter $κ$, also has a minor dependence on seeing conditions. These corrections will be particularly useful for stellar kinematic measurements in current and future integral field spectroscopic (IFS) surveys of galaxies.
description: Accepted for publication in MNRAS 2020 June 20. 29 pages, 26 figures, including further supplementary material included online in Appendix D
An unsupervised machine-learning checkpoint-restart algorithm using Gaussian mixtures for particle-in-cell simulations
Creators: name: Chen, G.
name: Chacon, L.
name: Nguyen, T. B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We propose an unsupervised machine-learning checkpoint-restart (CR) algorithm for particle-in-cell (PIC) algorithms using Gaussian mixtures (GM). The algorithm features a particle compression stage and a particle reconstruction stage, where a continuum particle distribution function (PDF) is constructed and resampled, respectively. To guarantee fidelity of the CR process, we ensure the exact preservation of invariants such as charge, momentum, and energy for both compression and reconstruction stages, everywhere on the mesh. We also ensure the preservation of Gauss' law after particle reconstruction. As a result, the GM CR algorithm is shown to provide a clean, conservative restart capability while potentially affording orders of magnitude savings in input/output requirements. We demonstrate the algorithm using a recently developed exactly energy- and charge-conserving PIC algorithm using both electrostatic and electromagnetic tests. The tests demonstrate not only a high-fidelity CR capability, but also its potential for enhancing the fidelity of the PIC solution for a given particle resolution.
Cosmological evolution of Alpha driven by a general coupling with Quintessence
Creators: name: Marra, Valerio
name: Rosati, Francesca
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A general model for the cosmological evolution of the fine structure constant αdriven by a typical Quintessence scenario is presented. We consider a coupling between the Quintessence scalar ϕand the electromagnetic kinetic term F^2, given by a general function B_F(ϕ). We study the dependence of the cosmological Δα(t) upon the functional form of B_F and discuss the constraints imposed by the data. We find that different cosmological histories for Δα(t) are possible within the avaliable constraints. We also find that Quasar absorption spectra evidence for a time variation of alpha, if confirmed, is not incompatible with Oklo and meteorites limits.
description: 14 pages, 8 figures; V2: small corrections, figures improved, matches published version
Die Klimastreik-Bewegung als Teil der Gesellschaft: Inwiefern soziale Bewegungen ein Handlungsfeld für die Soziokulturelle Animation darstellen und welche Handlungsmöglichkeiten sich ihr bieten
Creators: name: Amstad, Micha
Publisher: name: Zenodo
Year: 2020

description: Seit dem Herbst 2018 gehen tausende Schülerinnen und Schüler, Studierende und Familien auf die Strasse um auf den Klimawandel und seine Folgen aufmerksam zu machen und Politik und Gesellschaft zum Handeln zu bewegen. Mit der Klimastreik-Bewegung entwickelte sich innert Kürze eine soziale Bewegung, welche es schaffte, den Diskurs zu prägen und die Klimathematik in den Mittelpunkt der öffentlichen Aufmerksamkeit zu stellen. Doch wie funktioniert diese Bewegung? Welche Funktion nimmt sie in der Gesellschaft war? Vor welchen inneren und äusseren Herausforderungen steht sie? Über die Klimastreik-Bewegung ist wenig fundiertes Wissen vorhanden. Diese Arbeit nimmt sich den oben genannten Fragen an und geht dabei einen Schritt weiter. Es wird aufgezeigt, wie sich eine soziale Bewegung, in diesem Fall konkret die Klimastreik-Bewegung, auf die gesellschaftliche Kohäsion auswirkt. In dieser Arbeit werden daraus der Handlungsbedarf für die Soziokulturelle Animation abgeleitet und konkrete Handlungsmöglichkeiten vorgeschlagen. Um die Forschungsfrage «Wie funktioniert die Klimastreik-Bewegung und vor welchen Herausforderungen steht sie?» adäquat beantworten zu können wurde eine qualitative Forschungsmethode angewendet. Junge Menschen, welche selbst in der Bewegung partizipieren, wurden befragt und deren Aussagen anhand von Wissen aus der Forschung zu sozialen Bewegungen ausgewertet. Der Bogen zur Soziokulturellen Animation konnte geschlagen werden, indem diese gesellschaftlich verortet und ihre Grundsätze sowie Arbeitsweise aufgeführt wurden. Die vorliegende Arbeit zeigt die Wichtigkeit von sozialen Bewegungen für unsere demokratische Gesellschaft auf. Andererseits wird dargestellt, wie sie Spannungen in unserer Gesellschaft erzeugen und damit den Zusammenhalt gefährden können. In dieser Arbeit wird dargelegt, weshalb sich die Soziokulturelle Animation mit der behandelten Thematik auseinandersetzen muss. Es stellte sich dabei heraus, dass soziale Bewegungen für die Soziokulturelle Animation ein Handlungsfeld darstellen. Als Profession, die sich der gesellschaftlichen Kohäsion und der Demokratie verschreibt, muss sie sich mit solchen Bewegungen befassen. Am Beispiel der Klimastreik-Bewegung konnten durch die Forschung konkrete Handlungsmöglichkeiten ausgearbeitet werden.
description: + Code Diss LU: hslusa bask be 2020 + Fussnote: Bachelorarbeit, Hochschule Luzern - Soziale Arbeit, Ausbildungsgang Soziokultur 2020 + NL-Code: NLLUHSA202002
THE SUPERSTORE'S PLACE IN SERVING CONSUMER NEEDS TODAY AND IN 1985
Creators: name: Churchill, Walter A.
name: Churchill, Walter A.
Publisher: name: Unknown
Year: 1976
Subjects: Consumer/Household Economics

description: The ability of a store to contribute and remain important to society is governed by its effective ability to produce a profit and communicate this need. You must serve a significant number of consumers to sustain a superstore.
Quantum annealing speedup of embedded problems via suppression of Griffiths singularities
Creators: name: Knysh, Sergey
name: Plamadeala, Eugeniu
name: Venturelli, Davide
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Optimal parameter setting for applications problems embedded into hardware graphs is key to practical quantum annealers (QA). Embedding chains typically crop up as harmful Griffiths phases, but can be used as a resource as we show here: to balance out singularities in the logical problem changing its universality class. Smart choice of embedding parameters reduces annealing times for random Ising chain from $O(exp[c\sqrt N])$ to $O(N^2)$. Dramatic reduction in time-to-solution for QA is confirmed by numerics, for which we developed a custom integrator to overcome convergence issues.
description: 11 pages [5 pages (3 figs) main text+references; 5 pages (2 figs) appendix; 1 page code listing]
Lenalidomide: A Review in Previously Treated Follicular Lymphoma
Creators: name: Blair, Hannah A.
Publisher: name: Adis Journals
Year: 2020
Subjects: Medicine

description: Compliance with Ethical Standards Funding The preparation of this review was not supported by any external funding. Conflict of interest Hannah Blair is a salaried employee of Adis International Ltd/Springer Nature, is responsible for the article content and declares no relevant conflicts of interest.
Additional information about this Adis Drug Review can be found here.

Abstract Lenalidomide (Revlimid®) is a targeted immunomodulatory drug with multiple mechanisms of action. In the USA and the EU, oral lenalidomide is indicated in combination with rituximab or a rituximab product for the treatment of patients with previously treated follicular lymphoma. In the pivotal, phase III AUGMENT trial, lenalidomide + rituximab significantly prolonged progression-free survival (PFS; primary endpoint) relative to placebo + rituximab in patients with relapsed or refractory indolent non-Hodgkin lymphoma, with the PFS benefit appearing to be specific to patients with follicular lymphoma and extending to elderly patients with this subtype. Lenalidomide + rituximab also demonstrated activity in an interim analysis of the phase III MAGNIFY trial in patients with relapsed or refractory indolent non-Hodgkin lymphoma, including those with rituximab-refractory disease. Lenalidomide had an acceptable tolerability profile. Although grade 3 or 4 neutropenia occurred more frequently with lenalidomide + rituximab than with placebo + rituximab, this was generally well managed with dosage adjustments and growth factor support. In conclusion, lenalidomide in combination with rituximab represents an important new treatment option for previously treated follicular lymphoma, including patients whose disease has become refractory to rituximab.

© Springer Nature Switzerland AG 2020
On the relationship between auroral and nebular oxygen line intensities in spectra of HII regions
Creators: name: Pilyugin, L. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate relationships between observed auroral and nebular oxygen line fluxes in spectra of HII regions. We find a relation that is metallicity-dependent at low metallicities, but becomes independent of metallicity (within the uncertainties of the available data) above 12+logO/H ~ 8.25, i.e. there is one-to-one correspondance (the ff - relation) between auroral and nebular oxygen line fluxes in spectra of high-metallicity HII regions. The ff - relation allows one to estimate the flux in the auroral line from strong oxygen line measurements. This solves the problem of the electron temperature (and, consequently, abundance) determination in high-metallicity HII regions. The ff - relation confirms the basic idea of the empirical method, proposed by Pagel et al. (1979) a qurter of a century ago, that the oxygen abundance in HII region can be estimated from the strong oxygen lines measurements only.
description: 4 pages, 2 figures, accepted for publication in Astronomy and Astrophysics
Effects of Cowling Resistivity in the Weakly-Ionized Chromosphere
Creators: name: Yalim, Mehmet Sarp
name: Prasad, Avijeet
name: Pogorelov, Nikolai
name: Zank, Gary
name: Hu, Qiang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The physics of the solar chromosphere is complex from both theoretical and modeling perspectives. The plasma temperature from the photosphere to corona increases from ~5,000 K to ~1 million K over a distance of only ~10,000 km from the chromosphere and the transition region. Certain regions of the solar atmosphere have sufficiently low temperature and ionization rates to be considered as weakly-ionized. In particular, this is true at the lower chromosphere. As a result, the Cowling resistivity is orders of magnitude greater than the Coulomb resistivity. Ohm's law therefore includes anisotropic dissipation. To evaluate the Cowling resistivity, we need to know the external magnetic field strength and to estimate the neutral fraction as a function of the bulk plasma density and temperature. In this study, we determine the magnetic field topology using the non-force-free field (NFFF) extrapolation technique based on SDO/HMI SHARP vector magnetogram data, and the stratified density and temperature profiles from the Maltby-M umbral core model for sunspots. We investigate the variation and effects of Cowling resistivity on heating and magnetic reconnection in the chromosphere as the flare-producing active region (AR) 11166 evolves. In particular, we analyze a C2.0 flare emerging from AR11166 and find a normalized reconnection rate of 0.051.
description: 15 pages, 5 figures, The Astrophysical Journal Letters (in press)
Resonances in the one-dimensional Dirac equation in the presence of a point interaction and a constant electric field
Creators: name: Gonzalez-Diaz, Luis
name: Villalba, Victor M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We show that the energy spectrum of the one-dimensional Dirac equation in the presence of a spatial confining point interaction exhibits a resonant behavior when one includes a weak electric field. After solving the Dirac equation in terms of parabolic cylinder functions and showing explicitly how the resonant behavior depends on the sign and strength of the electric field, we derive an approximate expression for the value of the resonance energy in terms of the electric field and delta interaction strength.
description: 9 pages. To appear in Physics Letters A
Correlative study of the effect of the squat exercises on the improvement of the olympic exercises performance in Algerian weightlifters
Creators: name: Gasmi, Amin
name: Touami, Ali
Publisher: name: figshare
Year: 2020
Subjects: subject: 110699 Human Movement and Sports Science not elsewhere classified
subject: FOS: Health sciences

description: The purpose of this study was to determine the influence of the two squat variants (back and front squat) on the two olympic movements (snatch, clean and jerk) results. Seventy two (72) Algerian weightlifters, which nine of them are international confirmed weightlifters, have taken part in this study. Each weightlifter has gone through four maximal tests (1-RM) : snatch, clean and jerk, back and front squat. For each test the weightlifter has performed three trials. The best result in each test has been registred. Many categories was selected from the collected data : age (three categories), height (three categories) and weight (four categories). Then, we have statistically analyzed the selected data with a Personal Computer equiped by a statistics software : SPSS in order to determine the relationship between the squat exercises and the olympic movements results in different categories of age, height and weight by calculating the correlation coefficient of Pearson. The results of this research shows that Pearson coefficients are higher than 0,9 with a signification level of α = 0,0005 between the squat exercises and the olympic movements performances in any category of age, height or weight whichconfirms our hypothesis about the importance of the squat exercises in the improvement of the snatch and clean and jerk results. In front of this, no significative difference wasobserved between the influence neither of the back squat nor of the front squat on the olympic exercises which prove that the back and the front squat improve in the same way the results of the snatch and the clean and jerk.
Pattern of Water Use at the United Arab Emirates University
Creators: name: Yagoub, M. M.
Publisher: name: figshare
Year: 2020
Subjects: Geography

description: In this study, indoor water use at the United Arab Emirates University (UAEU) was assessedfor three years (2016, 2017, and 2018). A geographic information system (GIS) was employed todetermine where water use is high within the university, when and why water is used, who usesit, and how to minimize its usage. Diverse data were employed to elucidate the broad patterns ofuniversity water use. It was assumed that water use is directly proportional to the number of studentsand is lower during winter. The relationship between water use and number of students in academicbuildings was modeled using least squares regression. The results indicate a low correlation betweenwater use and the number of students, possibly due to the centralized usage of academic buildingsand movement of students between them. The hypothesis of activity-driven consumption indicatedthat most water use occurred in residential buildings (47.5%), averaging 81.7 L per person per day(LPD). This value is lower than the metrics for dormitories in the United States (121 LPD) and Europe(143 LPD). A survey of 412 students revealed that half the respondents were not aware of waterissues. Most of them (87%) preferred to drink bottled water and were not willing to use gray waterfor flushing (56%) or urinals (60%). The findings of this study will improve the understanding ofuniversity water use which will facilitate the development of e?ective water conservation policiesand the establishment of such practices among the next generation.
Quantum Imaging for Semiconductor Industry
Creators: name: Paterova, Anna V.
name: Yang, Hongzhi
name: Toa, Zi S. D.
name: Krivitsky, Leonid A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Infrared (IR) imaging is one of the significant tools for the quality control measurements of fabricated samples. Standard IR imaging techniques use direct measurements, where light sources and detectors operate at IR range. Due to the limited choices of IR light sources or detectors, challenges in reaching specific IR wavelengths may arise. In our work, we perform indirect IR microscopy based on the quantum imaging technique. This method allows us to probe the sample with IR light, while the detection is shifted into the visible or near-IR range. Thus, we demonstrate IR quantum imaging of the silicon chips at different magnifications, wherein a sample is probed at 1550 nm wavelength, but the detection is performed at 810 nm. We also analyze the possible measurement conditions of the technique and estimate the time needed to perform quality control checks of samples.
description: Submitted for publication
A hard-sphere model on generalized Bethe lattices: Statics
Creators: name: Hansen-Goos, Hendrik
name: Weigt, Martin
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We analyze the phase diagram of a model of hard spheres of chemical radius one, which is defined over a generalized Bethe lattice containing short loops. We find a liquid, two different crystalline, a glassy and an unusual crystalline glassy phase. Special attention is also paid to the close-packing limit in the glassy phase. All analytical results are cross-checked by numerical Monte-Carlo simulations.
description: 24 pages, revised version
Recombination Lines and Molecular Gas from Hypercompact HII regions in W51 A
Creators: name: Rivera-Soto, Rudy
name: Galván-Madrid, Roberto
name: Ginsburg, Adam
name: Kurtz, Stan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a detailed characterization of the population of compact radio-continuum sources in W51 A using subarcsecond VLA and ALMA observations. We analyzed their 2-cm continuum, the recombination lines (RL's) H77$α$ and H30$α$, and the lines of $\rm H_{2}CO(3_{0,3}-2_{0,2})$, $\rm H_{2}CO(3_{2,1}-2_{2,0})$, and $\rm SO(6_{5}-5_{4})$. We derive diameters for 10/20 sources in the range $D \sim 10^{-3}$ to $\sim 10^{-2}$ pc, thus placing them in the regime of hypercompact HII regions (HC HII's). Their continuum-derived electron densities are in the range $n_{\rm e} \sim 10^4$ to $10^5$ cm$^{-3}$, lower than typically considered for HC HII's. We combined the RL measurements and independently derived $n_{\rm e}$, finding the same range of values but significant offsets for individual measurements between the two methods. We found that most of the sources in our sample are ionized by early B-type stars, and a comparison of $n_{\rm e}$ vs $D$ shows that they follow the inverse relation previously derived for ultracompact (UC) and compact HII's. When determined, the ionized-gas kinematics is always (7/7) indicative of outflow. Similarly, 5 and 3 out of the 8 HC HII's still embedded in a compact core show evidence for expansion and infall motions in the molecular gas, respectively. We hypothesize that there could be two different types of $hypercompact$ ($D< 0.05$ pc) HII regions: those that essentially are smaller, expanding UC HII's; and those that are also $hyperdense$ ($n_{\rm e} > 10^6$ cm$^{-3}$), probably associated with O-type stars in a specific stage of their formation or early life.
description: The Astrophysical Journal, in press. 23 pages, 9 figures
CAUSALITY IN FUTURES MARKETS
Creators: name: Bryant, Henry L.
name: Bessler, David A.
name: Haigh, Michael S.
name: Bryant, Henry L.
name: Bessler, David A.
name: Haigh, Michael S.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Marketing
subject: FOS: Economics and business

description: This research investigates various unresolved issues regarding futures markets, using formal methods appropriate for inferring causal relationships from observational data when some relevant quantities are hidden. We find no evidence supporting the generalized version of Keynes's theory of normal backwardation. We find no evidence supporting theories that predict that the level of activity of speculators or uninformed traders affects the level of price volatility, either positively or negatively. Our evidence strongly supports the mixture of distribution hypothesis (MDH) that trading volume and price volatility have one or more latent common causes, resulting in their positive correlation.