cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Experiências de mapeamento participativo no INPE
Creators: name: Jocilene Dantas Barros
Publisher: name: IVIDES.org, Rio de Janeiro.
Year: 2025

description: Palestra ministrada no Workshop Mapeamento Participativo e Cartografia Social 2022, em 14 de dezembro de 2022. Este é um evento organizado pelo Instituto Virtual para o Desenvolvimento Sustentável - IVIDES.org, com parceria do Laboratório de Cartografia - GeoCart-UFRJ.

Vídeo no canal do IVIDES.org no YouTube: https://www.youtube.com/live/30Zi_eTMtyo

Este material está sob a licença Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0). Você pode adaptar esta apresentação e disseminá-la, desde que mencione a autoria, mas não pode usar com fins comerciais.
Nanophononic metamaterial: Thermal conductivity reduction by local resonance
Creators: name: Davis, Bruce L.
name: Hussein, Mahmoud I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present the concept of a locally resonant nanophononic metamaterial for thermoelectric energy conversion. Our configuration, which is based on a silicon thin-film with a periodic array of pillars erected on one or two of the free surfaces, qualitatively alters the base thin-film phonon spectrum due to a hybridization mechanism between the pillar local resonances and the underlying atomic lattice dispersion. Using an experimentally-fitted lattice-dynamics-based model, we conservatively predict a drop in the metamaterial thermal conductivity to as low as 50% of the corresponding uniform thin-film value despite the fact that the pillars add more phonon modes to the spectrum.
VUV-Vis optical characterization of Tetraphenyl-butadiene films on glass and specular reflector substrates from room to liquid Argon temperature
Creators: name: Francini, R.
name: Montereali, R. M.
name: Nichelatti, E.
name: Vincenti, M. A.
name: Canci, N.
name: Segreto, E.
name: Cavanna, F.
name: Di Pompeo, F.
name: Carbonara, F.
name: Fiorillo, G.
name: Perfetto, F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The use of efficient wavelength-shifters from the vacuum-ultraviolet to the photosensor's range of sensitivity is a key feature in detectors for Dark Matter search and neutrino physics based on liquid argon scintillation detection. Thin film of Tetraphenyl-butadiene (TPB) deposited onto the surface delimiting the active volume of the detector and/or onto the photosensor optical window is the most common solution in current and planned experiments. Detector design and response can be evaluated and correctly simulated only when the properties of the optical system in use (TPB film + substrate) are fully understood. Characterization of the optical system requires specific, sometimes sophisticated optical methodologies. In this paper the main features of TPB coatings on different, commonly used substrates is reported, as a result of two independent campaigns of measurements at the specialized optical metrology labs of ENEA and University of Tor Vergata. Measured features include TPB emission spectra with lineshape and relative intensity variation recorded as a function of the film thickness and for the first time down to LAr temperature, as well as optical reflectance and transmittance spectra of the TPB coated substrates in the wavelength range of the TPB emission.
title: Effect of masker level on overshoot in running‐ and frozen‐noise maskers
Creators: name: Klitzing, Regine von
name: Kohlrausch, Armin
Publisher: name: AIP Publishing
Year: 2022

description: Masked thresholds were measured with running‐ and frozen‐noise maskers. The 5‐kHz signal was 2 ms in duration. The masker was low‐pass noise (20 Hz–10 kHz); its total duration was 300 ms. The overall level of the masker was 30, 50, or 70 dB SPL. The onset of the signal was delayed by 0, 3, 8, 18, 198, or 278 ms relative to the onset of the masker. In all frozen‐noise measurements, the signal was added to the same fine structure of the noise. Overshoot in frozen noise was measured for two starting phases of the signal that led to a 10‐dB difference for large signal‐onset delays. In all three configurations (running noise and frozen noise with two different signal phases) masker level had a similar influence on overshoot. At the intermediate masker level (50 dB SPL), a significant amount of overshoot (up to 15 dB) was observed in all three conditions. At the low and the high masker levels, overshoot was very much reduced, and even became negative in most conditions for the 30‐dB‐SPL masker. For the 50‐dB frozen‐noise masker, the total variation of thresholds with signal phase was 8 to 11 dB for long signal‐onset delays, but only 3 to 6 dB for short delays. For the low‐ and high‐level maskers, where only a small overshoot was observed, the threshold variation with phase for a signal at masker onset was the same as that for the long‐delay condition. An explanation for the variation of signal detectability with masker level is proposed that refers explicitly to the compressive input–output characteristic of the basilar membrane at intermediate levels.
Relativistic path integral and relativistic Hamiltonians in QCD and QED
Creators: name: Simonov, Yu. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The proper-time 4d path integral is used as a starting point to derive the new explicit parametric form of the quark-antiquark Green's function in gluonic and QED fields, entering as a common Wilson loop. The subsequent vacuum averaging of the latter allows to derive the instantaneous Hamiltonian. The explicit form and solutions are given in the case of the $q\bar q$ mesons in magnetic field.
description: 27 pages,2 figures,misprints corrected
Information-theoretic tools for parametrized coarse-graining of non-equilibrium extended systems
Creators: name: Katsoulakis, Markos A.
name: Plechac, Petr
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Information Theory (cs.IT)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: 82-08, 82-C20, 82-C22, 82-C80

description: In this paper we focus on the development of new methods suitable for efficient and reliable coarse-graining of {\it non-equilibrium} molecular systems. In this context, we propose error estimation and controlled-fidelity model reduction methods based on Path-Space Information Theory, and combine it with statistical parametric estimation of rates for non-equilibrium stationary processes. The approach we propose extends the applicability of existing information-based methods for deriving parametrized coarse-grained models to Non-Equilibrium systems with Stationary States (NESS). In the context of coarse-graining it allows for constructing optimal parametrized Markovian coarse-grained dynamics, by minimizing information loss (due to coarse-graining) on the path space. Furthermore, the associated path-space Fisher Information Matrix can provide confidence intervals for the corresponding parameter estimators. We demonstrate the proposed coarse-graining method in a non-equilibrium system with diffusing interacting particles, driven by out-of-equilibrium boundary conditions.
description: 14 pages, 6 figures, expanded version v2 with additional benchmark
A new integral representation for the scalar products of Bethe states for the XXX spin chain
Creators: name: Kazama, Yoichi
name: Komatsu, Shota
name: Nishimura, Takuya
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Based on the method of separation of variables due to Sklyanin, we construct a new integral representation for the scalar products of the Bethe states for the SU(2) XXX spin 1/2 chain obeying the periodic boundary condition. Due to the compactness of the symmetry group, a twist matrix must be introduced at the boundary in order to extract the separated variables properly. Then by deriving the integration measure and the spectrum of the separated variables, we express the inner product of an on-shell and an off-shell Bethe states in terms of a multiple contour integral involving a product of Baxter wave functions. Its form is reminiscent of the integral over the eigenvalues of a matrix model and is expected to be useful in studying the semi-classical limit of the product.
description: 37 pages;v3 Typos corrected and ref added, Clarifying explanations added, Published ver
The Fate of Monsters in Anti-de Sitter Spacetime
Creators: name: Ong, Yen Chin
name: Chen, Pisin
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Black hole entropy remains a deep puzzle: where does such enormous amount of entropy come from? Curiously, there exist gravitational configurations that possess even larger entropy than a black hole of the same mass, in fact, arbitrarily high entropy. These are the so-called monsters, which are problematic to the Anti-de Sitter/Conformal Field Theory (AdS/CFT) correspondence paradigm since there is far insufficient degrees of freedom on the field theory side to account for the enormous entropy of monsters in AdS bulk. The physics of the bulk however may be considerably modified at semi-classical level due to the presence of branes. We show that this is especially so since monster spacetimes are unstable due to brane nucleation. As a consequence, it is not clear what the final fate of monsters is. We argue that in some cases there is no real threat from monsters since although they are solutions to Einstein's Field Equations, they are very likely to be completely unstable when embedded in string theory, and thus probably are not solutions to the full quantum theory of gravity. Our analysis, while suggestive and supportive of the claim that such pathological objects are not allowed in the final theory, by itself does not rule out all monsters. We comment on various kin of monsters such as the bag-of-gold spacetime, and also discuss briefly the implications of our work to some puzzles related to black hole entropy.
description: Version accepted by JHEP
Low-Mass Dark-Matter Hint from CDMS II, Higgs Boson at the LHC, and Darkon Models
Creators: name: He, Xiao-Gang
name: Tandean, Jusak
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The CDMS II experiment has observed three events which may have arisen from weakly interacting massive particle (WIMP) dark matter (DM) with mass of order 9 GeV colliding with nuclei. Although the implied WIMP parameter region seems to be excluded by limits from the XENON experiments, it is interesting that most of this tension can go away if the WIMP-nucleon interaction violates isospin. This motivates us to explore some of the implications for models in which a real gauge-singlet scalar particle, the darkon, serves as the WIMP, taking into account the recent discovery of a Higgs boson at the LHC and Planck determination of the DM relic density. In the simplest scenario, involving only the standard model plus a darkon, the Higgs boson is largely invisible due to its decay into a pair of darkons having the WIMP mass suggested by CDMS II and hence cannot be identified with the one found at the LHC. We find, on the other hand, that a two-Higgs-doublet model supplemented with a darkon has ample parameter space to accommodate well both the new potential DM hint from CDMS II and the Higgs data from the LHC, whether or not the darkon-nucleon interaction conserves isospin.
description: 9 pages, 2 figures, somewhat revised, references added, results unchanged, matches journal version
A photoelastic investigation of the effect of cutouts in panels subject to shear and bending
Creators: name: Tyra, Thomas Donald
name: Hollister, William Wallace
Publisher: name: California Institute of Technology
Year: 1941
Subjects: Aeronautics
Aeronautical Engineering

description: In the design of modern aircraft many structural problems have arisen which are not subject to a simple analysis. Although the usual formulas of elasticity apply, their application becomes too cumbersome for practical use. A problem of this type is the determination of stresses around openings or cutouts. Thus, in monocoque construction there are openings for doors, windows, hatches, etc. Frames and bulkheads are pierced for the passage of conduits, ducts, or other members. In many of these cases, no formal determinations of the stresses can be made. It is well known, however, that stress concentrations do occur at reentrant corners, openings, etc. It was the purpose of this investigation to determine by photoelastic means the amount of this stress concentration, and how it varied in intensity under different conditions of loading, and with various types of openings.
Question - How do we document validated questionnaires and their usage?
Creators: name: Mills, Hayley
Publisher: name: Zenodo
Year: 2022

description: Validated questionnaires (or standardised scales) are a set of question items designed to quantify one or more indirectly measured concepts. They are validated to ensure researchers can reliably measure the same concept across samples, and over time. For intra- and inter-study comparison, it is valuable to know where and when validated questionnaires have been used and how. Metadata for this can be difficult to obtain as information is often distributed across multiple sources and little information is available about where the questions have been used. CLOSER aims to make this information more easily accessible by adding validated questionnaires to CLOSER Discovery (discovery.closer.ac.uk), and moreover, link the question items to where they have been used. This presentation will set out how CLOSER intends to use DDI, to structure this metadata within CLOSER Discovery and the Colectica repository. It will detail the considerations and reasoning used to find a workable solution; however, we would value input on whether this is the optimal approach.
Exploring the geometry of qutrit state space using symmetric informationally complete probabilities
Creators: name: Tabia, Gelo Noel M.
name: Appleby, D. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We examine the geometric structure of qutrit state space by identifying the outcome probabilities of symmetric informationally complete (SIC) measurements with quantum states. We categorize the infinitely many qutrit SICs into eight SIC families corresponding to independent orbits of the extended Clifford group. Every SIC can be uniquely identified from a set of geometric invariants that we use to establish several properties of the convex body of qutrits, which include a simple formula describing its extreme points, an expression for the rotation between the probability vectors for distinct qutrit SICs, and a polar equation for its boundary states.
description: 8 pages, 3 figures; v2 published version
Lipschitz connectivity and filling invariants in solvable groups and buildings
Creators: name: Young, Robert
Publisher: name: arXiv
Year: 2013
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 20F65, 20E42

description: We give some new methods, based on Lipschitz extension theorems, for bounding filling invariants of subsets of nonpositively curved spaces. We apply our methods to find sharp bounds on higher-order Dehn functions of Sol_{2n+1}, horospheres in euclidean buildings, Hilbert modular groups, and certain S-arithmetic groups.
description: 32 pages, 2 figures; minor revisions
Aprendiendo Funciones Matemáticas en Educación Secundaria con Desmos
Creators: name: Peralta, Javier
Publisher: name: Zenodo
Year: 2021
Subjects: matemáticas
educación secundaria
desmos
art-thinking
gamification

description: En este Trabajo Final de Máster (TFM) presento el proyecto de investigación llevado a cabo en el colegio concertado Huerta de la Cruz (Algeciras, España) durante el curso escolar 2020/2021, contemporizando mi formación como docente durante el periodo de prácticas del Máster Universitario en Formación del Profesorado de Secundaria, Bachillerato, Ciclos, Escuelas de Idiomas y Enseñanzas Deportivas de la Universidad Europea de Valencia. El objetivo principal era evaluar la incidencia del alumnos afectados por miedo a las matemáticas y del impacto que la combinación de ciertas metodologías activas con herramientas digitales puede tener en estudiantes de 2º de Enseñanza Secundaria Obligatoria (ESO). El estudio se extendió 51 días, entre el 18 de Mayo y el 7 de Julio de 2021. Constó de una encuesta inicial, dos sesiones de una hora cada una en el aula de informática del centro (donde el alumnado aprendió sobre funciones matemáticas combinando la plataforma Desmos con videojuegos y una actividad artística), y finalmente otra encuesta para evaluar el impacto de las actividades.
title: Сборник контрольных работ и проверочных заданий по грамматике для студентов-иностранцев экономического факультета. В 2 частях. Ч. I
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2023

description: Учебное пособие представляет собой сборник контрольных материалов и включает в себя блоки грамматических заданий, составленных на базе как общеупотребительной лексики, так и лексики экономической специальности. В издание вошли основные грамматические темы, характерные для изучения на уровне В1+. Предлагаемые авторами сборника задания могут быть направлены, с одной стороны, на контроль, с другой стороны — на систематизацию, корректировку и углубление знаний учащихся в области русской грамматики. Учебное пособие адресовано иностранным студентам, продолжающим изучать русский язык как иностранный в вузах Российской Федерации. Может быть использовано в ходе практических занятий при обучении иностранных студентов первых курсов бакалавриата и магистратуры.
A Sample of OB Stars That Formed in the Field
Creators: name: Oey, M. S.
name: Lamb, J. B.
name: Kushner, C. T.
name: Pellegrini, E. W.
name: Graus, A. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a sample of 14 OB stars in the Small Magellanic Cloud that meet strong criteria for having formed under extremely sparse star-forming conditions in the field. These stars are a minimum of 28 pc in projection from other OB stars, and they are centered within symmetric, round HII regions. They show no evidence of bow shocks, implying that the targets are not transverse runaway stars. Their radial velocities relative to local HI also indicate that they are not line-of-sight runaway stars. A friends-of-friends analysis shows that 9 of the objects present a few low-mass companion stars, with typical mass ratios for the two highest-mass stars of around 0.1. This further substantiates that these OB stars formed in place, and that they can and do form in extremely sparse conditions. This poses strong constraints on theories of star formation and challenges proposed relations between cluster mass and maximum stellar mass.
description: Accepted to ApJ, 12 pages
Attracting STEM-talented undergraduates to secondary education with early teaching experiences - Abstract
Creators: name: Gugliucci, Nicole
name: Demers, Kelly
Publisher: name: figshare
Year: 2021
Subjects: subject: Education
subject: 130313 Teacher Education and Professional Development of Educators
subject: FOS: Educational sciences

description: Peer-reviewed abstract for the 2021 Meeting of the New England Educational Research Organization. Accepted for presentation.
title: Rebooting Electronic Literature, volume 2: Documenting Pre-Web Born Digital Media
Creators: name: Grigar, Rudyne (Dene)
name: Schiller, Nicholas
name: Slocum, Holly
name: Gwin, Mariah
name: Nevue, Andrew
name: Zoller, Kathleen
name: Roath, Moneca
Publisher: name: Electronic Literature Lab
Year: 2019

description: Rebooting Electronic Literature, Volume 2  is the second of a series of open-source, multimedia books documenting works of electronic literature held in Dene Grigar's Electronic Literature Lab (ELL) collection at Washington State University Vancouver. The five works selected for this volume are among the most unique and fragile in the collection. All constitute long-form writing produced with stand-alone hypertext authoring systems available during the late 20th and early 21st centuries. The hypertext novels include Kathryn Cramer's In Small & Large Pieces (1994), Richard Holeton's Figurski at Findhorn on Acid (2001), and Tim McLaughlin's Notes toward Absolute Zero (1995). Also featured is Stephanie Strickland's long narrative poem, True North (1997), and Deena Larsen's anthology of interconnected hypertext stories, Samplers (1997). All were produced with Storyspace, the software program created by Michael Joyce, Jay David Bolter, and John B. Smith in 1987 and licensed by Mark Bernstein of Eastgate Systems, Inc. in 1990 [1]  and published by the company. Additionally all were released on 3.5-inch floppy disks. Most works were migrated later to the CD-ROM format. That said, Strickland's True North came out both on floppy disk and CD-ROM versions close to the same time. Cramer's In Small & Large Pieces, on the other hand, was never migrated to CD-ROM format. With the demise of the CD-ROM drive as standard equipment on contemporary computers, access to all of these works is in danger of being lost to the public.
Analogues of 1, 2-propanediol, inactivators of dioldehydrase I. Studies on the effect of 3-halo-1, 2-propanediols on the coenzyme B_(12) dependent dioldehydrase reaction II. Studies on the effect of an epoxide on dioldehydrase
Creators: name: Lamkin, Mark Stuart
Publisher: name: California Institute of Technology
Year: 1976
Subjects: Chemistry

description: PART I:
3-Chloro-1, 2 -propanediol, 3 -bromo-1, 2-propanediol, and 3-iodo-1, 2-propanediol have been found to bind to dioldehydrase. Dissociation constants are approximately equal in each case. Binding occurs in a manner similar to that of the normal substrate, 1, 2-propanediol.  All three compounds behave as competitive inhibitors while 3-chloro-1, 2-propanediol and 3-brom-1, 2-propanediol inactivate the holoenzyme as well. This inactivation process is irreversible and may involve the alkylation of sulfhydryl residues of dioldehydrase. Of the above compounds, only 3-chloro-1, 2-propanediol is converted to product; possibly β-chloropropionaldehyde is formed.

PART II:
2, 3-Epoxypropanol (glycidol) has been found to bind to dioldehydrase.	Its calculated dissociation constant is 8.8 X 10^(-4) M.  It binds to dioldehydrase even though it has but one hydroxyl group.	2, 3-Epoxypropanol behaves as a competitive inhibitor.  This compound also inactivates the holoenzyme.  Unlike the compounds studied in Part I, it also inactivates the apoenzyme, although at a slower rate.  Since epoxides are known to alkylate sulfhydryl groups, the above result suggests the presence of exposed sulfhydryl residues.
title: Сборник контрольных работ и проверочных заданий по грамматике для студентов-иностранцев экономического факультета. В 2 частях. Ч. II
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2023

description: Учебное пособие представляет собой сборник контрольных материалов и включает в себя блоки грамматических заданий, составленных на базе как общеупотребительной лексики, так и лексики экономической специальности. В издание вошли основные грамматические темы, характерные для изучения на уровне В1+. Предлагаемые авторами сборника задания могут быть направлены, с одной стороны, на контроль, с другой стороны — на систематизацию, корректировку и углубление знаний учащихся в области русской грамматики. Учебное пособие адресовано иностранным студентам, продолжающим изучать русский язык как иностранный в вузах Российской Федерации. Может быть использовано в ходе практических занятий при обучении иностранных студентов первых курсов бакалавриата и магистратуры.
Nonlinear subdiffusive fractional equations and aggregation phenomenon
Creators: name: Fedotov, Sergei
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: In this article we address the problem of the nonlinear interaction of subdiffusive particles. We introduce the random walk model in which statistical characteristics of a random walker such as escape rate and jump distribution depend on the mean field density of particles. We derive a set of nonlinear subdiffusive fractional master equations and consider their diffusion approximations. We show that these equations describe the transition from an intermediate subdiffusive regime to asymptotically normal advection-diffusion transport regime. This transition is governed by nonlinear tempering parameter that generalizes the standard linear tempering. We illustrate the general results through the use of the examples from cell and population biology. We find that a nonuniform anomalous exponent has a strong influence on the aggregation phenomenon.
description: 10 pages
Emission of fermions in little string theory
Creators: name: Lorente-Espín, Oscar
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It is well-known that little string theory (LST) black holes radiate a purely thermal spectrum of scalar particles. This theory lives in a Hagedorn phase with a fixed Hagedorn temperature that does not depend on its mass. Therefore, the theory keeps a thermal profile even taking into account self-gravitating effects and the back-reaction of the metric. This has implications concerning the information loss paradox; one would not be able to recover any information from the LST black hole since the emission of scalar particles is totally uncorrelated. Several studies of the emission spectrum in LST concern scalar fields; it is our aim in this work to extend the study to the emission of fermions in order to verify that the most relevant conclusion for the scalar field remains valid for the fermions fields. Thus, we have calculated the emission probability, the flux, and also the greybody factor corresponding to a fermion field in LST background.
description: 17 pages, no figures, minor corrections
Exact and approximate solutions to the pressure-loaded plate strip with temperature distribution
Creators: name: Lindquist, David Max Wadsworth
Publisher: name: California Institute of Technology
Year: 1960
Subjects: Aeronautics

description: The large deflection analysis for a plate strip under uniform pressure and temperature loading is extended to include spanwise variation of temperature. An exact temperature distribution is derived and stress and deflection equations are developed for the fundamental mode thereof. A parabolic approximation to the fundamental mode is shown to be reasonably accurate. Using this approximation, a direct analogy to the case of uniform temperature distribution can be demonstrated in terms of "effective" pressure, temperature moment, and average temperature.  The equilibrium equations are formally identical, permitting the use of design charts based on spanwise constant loadings.
Great debate
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Politics and culture
Politics and government

description: A series of pre-recorded talks by Dr. Timothy Leary and G. Gordon Liddy. Leary discusses the younger generation, outer space, using video games in education, and drugs. Liddy focuses on gun control, religion, and politics. They both discuss being disliked by the public. "America the Beautiful" plays.
Attracting STEM-talented undergraduates to secondary education with early teaching experiences - Abstract
Creators: name: Gugliucci, Nicole
Publisher: name: figshare
Year: 2021
Subjects: subject: Education
subject: 130313 Teacher Education and Professional Development of Educators
subject: FOS: Educational sciences

description: Peer-reviewed abstract for the 2021 Meeting of the New England Educational Research Organization. Accepted for presentation.
Four-dimensional aether-like Lorentz-breaking QED revisited and problem of ambiguities
Creators: name: Scarpelli, A. P. Baeta
name: Mariz, T.
name: Nascimento, J. R.
name: Petrov, A. Yu.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we consider the perturbative generation of the CPT-even aether-like Lorentz-breaking term in the extended Lorentz-breaking QED within different approaches and discuss its ambiguities.
description: 15 pages, version accepted to EPJ C
Hot Brownian Carriers in the Langevin Picture: Application to a simple model for the Gunn Effect in GaAs
Creators: name: Bauke, F. C.
name: Lagos, R. E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider a charged Brownian gas under the influence of external, static and uniform electric and magnetic fields, immersed in a uniform bath temperature. We obtain the solution for the associated Langevin equation, and thereafter the evolution of the nonequilibrium temperature towards a nonequilibrium (hot) steady state. We apply our results to a simple yet relevant Brownian model for carrier transport in GaAs. We obtain a negative differential conductivity regime (Gunn effect) and discuss and compare our results with experimental results.
description: 22 pages, 9 figures, submitted to Physica A
Rotating Black Droplet
Creators: name: Fischetti, Sebastian
name: Santos, Jorge E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct the gravitational dual, in the Unruh state, of the "jammed" phase of a CFT at strong coupling and infinite N on a fixed five-dimensional rotating Myers-Perry black hole with equal angular momenta. When the angular momenta are all zero, the solution corresponds to the five-dimensional generalization of the solution first studied by Figueras, Lucietti, and Wiseman. In the extremal limit, when the angular momenta of the Myers-Perry black hole are maximum, the Unruh, Boulware and Hartle-Hawking states degenerate. We give a detailed analysis of the corresponding holographic stress energy tensor for all values of the angular momenta, finding it to be regular at the horizon in all cases. We compare our results with existent literature on thermal states of free field theories on black hole backgrounds.
description: 29 pages. v2: Updated to correct a mistake and address referee's comments
Collaboration and Entrepreneurship within Digital Environment
Creators: name: Shvetsova, Olga A.
Publisher: name: Zenodo
Year: 2021
Subjects: Entrepreneurship
big data
online collaboration
digital economy
case study
knowledge economy

description: Companies engage in various international relationships with external stakeholders to create attractive offerings. This book describes the most common online business collaboration concepts in international environment, and compare their characteristics. The concepts are evaluated in terms of their implications for companies, particularly in innovation and big data collaboration contexts. The study is based on the literature findings on common online business collaboration concepts, analyses of their characteristics, and an evaluation of implications from a company’s perspective. The key implications for a company include the need for interaction with various external stakeholders to enhance innovation, opportunities and access to important resources, and the need to prepare for online network changes. While many collaboration concepts are utilized in contemporary business literature, their use in traditional research varies, and the concepts have not been analyzed and compared together within online environment.
Národný informačný webinár k Európskemu cloudu pre otvorenú vedu (EOSC)
Creators: name: Dobbersteinová, Jitka
name: Krivjanská, Anna
name: Sofianos, Silvia
name: Stožická, Zuzana
Publisher: name: Zenodo
Year: 2022
Subjects: EOSC
Open Science
FAIR data
DMP

description: EOSC nastoľuje v oblasti vedy nový štandard výskumnej i publikačnej činnosti. Umožňuje tiež napredovanie výskumu prostredníctvom uchovávania nadobudnutých dát a ich využitia pre ďalší pokrok vo výskume. EOSC je úzko previazaný s princípmi otvorenej vedy a FAIR dát. Tieto sú pre ďalší rozvoj vedy, a teda celej spoločnosti, nevyhnutné. Účastníci webinára získajú možnosť praktického oboznámenia sa s vypracovaním Data Management Plan, ktorý uvádza, ako sa má s dátami zaobchádzať v procese výskumu i po jeho dokončení. Rovnako budú predstavené aktuálne výzvy programu Horizont Európa zamerané na zlepšovanie výskumných dát a infraštruktúr.
Convergence of The Relative Value Iteration for the Ergodic Control Problem of Nondegenerate Diffusions under Near-Monotone Costs
Creators: name: Arapostathis, Ari
name: Borkar, Vivek S.
name: Kumar, K. Suresh
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 93E15, 93E20

description: We study the relative value iteration for the ergodic control problem under a near-monotone running cost structure for a nondegenerate diffusion controlled through its drift. This algorithm takes the form of a quasilinear parabolic Cauchy initial value problem in $\RR^{d}$. We show that this Cauchy problem stabilizes, or in other words, that the solution of the quasilinear parabolic equation converges for every bounded initial condition in $\Cc^{2}(\RR^{d})$ to the solution of the Hamilton--Jacobi--Bellman (HJB) equation associated with the ergodic control problem.
Quantum Hall effect in gapped graphene heterojunctions
Creators: name: Lado, J. L.
name: González, J. W.
name: Fernández-Rossier, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We model the quantum Hall effect in heterostructures made of two gapped graphene stripes with different gaps, $Δ_1$ and $Δ_2$. We consider two main situations, $Δ_1=0,Δ_2\neq0$ and $Δ_1=-Δ_2$. They are different in a fundamental aspect: only the latter feature kink states that, when intervalley coupling is absent, are protected against backscattering. We compute the two terminal conductance of heterostructures with channel length up to 430 nm, in two transport configurations, parallel and perpendicular to the interface. By studying the effect of disorder on the transport along the boundary, we quantify the robustness of kink states with respect to backscattering. Transport perpendicular to the boundary shows how interface states open a backscattering channel for the conducting edge states, spoiling the perfect conductance quantization featured by the homogeneously gapped graphene Hall bars. Our results can be relevant for the study of graphene deposited on hexagonal Boron-Nitride as well as to model graphene with an interaction-driven gapped phase with two equivalent phases separated by a domain wall.
description: 11 pages, 8 figures
title: An examination of technology transfer: The channels through which technology can be transferred to and acquired by recipient organisations in Oman
Creators: name: Al-Ghafri, Hamdan Hamed
Publisher: name: University of Glasgow
Year: 1992
Subjects: subject: Organizational behavior, Information technology.

description: This research examines the transfer of technology to Oman and analyses the channels through which technology can be transferred to and acquired by recipient organisations in Oman. The present empirical investigation is intended to contribute to the existing large volume of literature on technological transfer, and highlight the salient factors relating to this process and analyse their impact on Oman as a developing country. In addition, it examines the impact of these factors on the development of national capabilities such as natural resources, educational institutions, and manpower. It was found from the literature review, the empirical findings and the questionnaire that Oman depends on foreign technology and foreign manpower, and lacks indigenous skilled manpower able to operate, monitor and adapt the imported technology. This study concludes that Oman should develop a plan to create and develop local capabilities, to generate technological know-how, and to use indigenous manpower for the benefit of the country. Therefore, the import of technology from advanced countries and the development of indigenous technological infrastructure must be viewed by Omani decision-makers as complementary to one another.
title: Все наверх! Интенсивный курс научного языка и речи для изучающих русский язык как иностранный
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2023

description: Настоящее учебное пособие адресовано будущим морским инженерам и предназначено для обучения речевой деятельности на русском языке иностранных обучающихся продвинутого этапа обучения (II–III курсы), магистрантов, аспирантов. Может быть использовано в качестве дополнения к базовым учебникам русского языка как иностранного для мьянманских носителей бирманского языка и англоговорящих студентов. Текстовые материалы составлены на основе базовых учебников и учебно-методических материалов выпускающих кафедр СПбГМТУ. В учебном пособии использованы и материалы печатных и электронных российских средств массовой информации по проблематике, указанной в содержании. Некоторые тексты сокращены и отредактированы в учебных целях.
Aerodynamic characteristics of a wedge and cone at hypersonic Mach numbers
Creators: name: Scherer, L. R.
Publisher: name: California Institute of Technology
Year: 1950
Subjects: Aeronautics

description: Up to the present time, the reliability of the determination of aerodynamic characteristics at hypersonic Mach numbers by theoretical calculations has been unknown due to the lack of experimental data. This report is the calculations of these characteristics by four different theories of a wedge and a cone over a range of Mach numbers from 2 to 12.

Correlation of these results with wind tunnel tests was not possible due to scheduling difficulties of the hypersonic wind tunnel; therefore, this report is designed to serve as the basis for comparison of future hypersonic experiments.

From correlation of the various theories it is found that the closest agreement to the exact theory at hypersonic speeds is given by the hypersonic similarity theory. Above Mach numbers of about 3, the first and second order theories deviate considerably from the exact theory.
Attracting STEM-talented undergraduates to secondary education with early teaching experiences
Creators: name: Gugliucci, Nicole
name: Demers, Kelly
Publisher: name: figshare
Year: 2021
Subjects: subject: 130313 Teacher Education and Professional Development of Educators
subject: FOS: Educational sciences
subject: Education

description: Full paper presented at the 2021 Meeting of the New England Educational Research Organization.
Fidelity of the surface code in the presence of a bosonic bath
Creators: name: Jouzdani, P.
name: Novais, E.
name: Mucciolo, E. R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the resilience of the surface code to decoherence caused by the presence of a bosonic bath. This approach allows us to go beyond the standard stochastic error model commonly used to quantify decoherence and error threshold probabilities in this system. The full quantum mechanical system-bath dynamics is computed exactly over one quantum error correction cycle. Since all physical qubits interact with the bath, space-time correlations between errors are taken into account. We compute the fidelity of the surface code as a function of the quantum error correction time. The calculation allows us to map the problem onto an Ising-like statistical spin model with two-body interactions and a fictitious temperature which is related to the inverse bath coupling constant. The model departs from the usual Ising model in the sense that interactions can be long ranged and can involve complex exchange couplings; in addition, the number of allowed configurations is restricted by the syndrome extraction. Using analytical estimates and numerical calculations, we argue that, in the limit of an infinite number of physical qubits, the spin model sustain a phase transition which can be associated to the existence of an error threshold in the surface code. An estimate of the transition point is given for the case of nearest-neighbor interactions.
description: 15 pages, 5 figures
title: Analysis of the dynamic behavior of sand-lime and ceramic bricks
Creators: name: Lamzin, D.A.
name: Bragov, A.M.
name: Lomunov, A.K.
name: Konstantinov, A.Yu.
name: dell'Isola, F.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2019

description: The results of dynamic tests on building brick samples were analyzed using the
incubation time fracture criterion. The strength and time properties of sand-lime brick and
ceramic brick were under study. The tests were carried out using the classical Kolsky method
and its modification - dynamic splitting. Strain rates under compression reached
2.5·103
 MPa/s while stress rates under tension reached 3.5·102 GPa/s. It is noted that the
strain rate affects the strength and time properties of the materials under study. The
parameters of the incubation time fracture criterion were determined on the basis of the
experimental deformation diagrams of material in axes stress versus time. Herewith, nonlinear
nature of the loading branch of dynamic diagrams was taken into account. Both tested
materials qualitatively showed the same change of the mechanical properties
title: A numerical study of ballistic behaviour of ceramic metallic bi-layer armor under impact load
Creators: name: Khan, M.K.
name: Iqbal, M.A.
name: Bratov, V.
name: Gupta, N.K.
name: Morozov, N.F.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2019

description: A 3D finite element model has been developed for studying the ballistic behaviour
of bi-layer ceramic-metal target plates under the impact loads induced by the projectiles of
different diameter to length ratios. The bi-layer target constituted of alumina 95, as front
layer, backed by aluminium alloy 2024-T3 layer, has been impacted by steel 4340 blunt and
ogival nosed projectiles of diameter to length ratios, 0.5 and 1.1. The constitutive behaviour
of ceramic was modelled using the Johnson-Holmquist (JH-2) constitutive model while that
of the metallic backing and the projectile using the Johnson-Cook (JC) material model. The
range of incident velocity of the projectile was considered between 800-1000 m/s. The
residual projectile velocity, damage induced in the target as well as the projectile, and the
ballistic limit velocity (BLV) have been obtained for the different diameter to length ratios (of
projectile).
DDI Variable Documentation and data access using R
Creators: name: Klas, Claus-Peter
name: Hopt, Oliver
Publisher: name: Zenodo
Year: 2022

description: Processing statistical files produced by STATA or SPSS are used for the documentation of research data. They contain information about the variables, explicitly variable name and label, as well as the response scales. But foremost the statistical files contain the data. So, besides the general metadata documentation also frequency tables, summary statistics or cross tables are created for documentation purposes based on the files. In order to enhance and automate the documentation process for archiving research data, I created an architecture based on R, exposed as generic REST API, partially based on the DDIwithR package. In the presentation I will describe the general architecture, how it is integrated into the DDI documentation process within the GESIS questionnaire editor. The process consists of - Reading the statistical file to connect questions in the questionnaire editor with variable metadata and store it in DDI LC 3.2 - Generating statistical information such as summary statistics and store it as variable statistics in DDI. - Furthermore, the package is technically able to give access to the actual data for direct usage in R, without downloading the SPSS/STATA file, either the complete dataset or singled out variables via PIDs.
description: The service is part of the KonsortSWD project deliverable (Persistent Identifiers for Variables - KonsortSWD Task Area 5: Measure 1), NFDI funding number 442494171.
title: Use of advanced materials in protection against high-velocity impact and explosion
Creators: name: Gerasimov, Aleksander V.
name: Igumnov, Leonid A.
name: Bragov, Anatoliy M.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2019

description: Numerical studies of the behavior of combined barriers consisting of solid and
porous materials were carried out during high-speed impact on them with thin plates. It is
shown that the introduction of plates of porous materials into the composition of combined
barriers can significantly reduce the amplitude of compression waves and reduce the
likelihood of spall damage. Comparison of the results of numerical modeling of high-speed
impact interaction processes with the experimental results of other authors showed their good
qualitative and quantitative agreement.
The temperature evolution of the shear viscosity in a unitary Fermi gas
Creators: name: Wlazłowski, Gabriel
name: Magierski, Piotr
name: Bulgac, Aurel
name: Roche, Kenneth J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present an ab initio determination of the shear viscosity for the unitary Fermi gas based on finite temperature quantum Monte Carlo (QMC) calculations and the Kubo linear-response formalism. The results are confronted with the bound for the shear viscosity originating from hydrodynamic fluctuations. Assuming smoothness of the frequency dependent shear viscosity eta(omega), we show that the bound is violated in the low temperature regime and the violation occurs simultaneously with the onset of the Cooper paring in the system. In order to preserve the hydrodynamic bound in QMC eta(omega) has to possess a sharp structure located in the vicinity of zero frequency which is not resolved by an analytic continuation procedure.