cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Chemical Origin of SEY at Technical Surfaces
Creators: name: Larciprete, R.
name: Grosso, D. R.
name: Commisso, M.
name: Flammini, R.
name: Cimino, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: The secondary emission yield (SEY) properties of colaminated Cu samples for LHC beam screens are correlated to the surface chemical composition determined by X-ray photoelectron spectroscopy. The surface of the "as received" samples is characterized by the presence of significant quantities of contaminating adsorbates and by the maximum of the SEY curve (dmax) being as high as 2.2. After extended electron scrubbing at kinetic energy of 10 and 500 eV, the dmax value drops to the ultimate values of 1.35 and 1.1, respectively. In both cases the surface oxidized phases are significantly reduced, whereas only in the sample scrubbed at 500 eV the formation of a graphitic-like C layer is observed. We find that the electron scrubbing of technical Cu surfaces can be described as occurring in two steps, where the first step consists in the electron induced desorption of weakly bound contaminants that occurs indifferently at 10 and at 500 eV and corresponds to a partial decrease of dmax, and the second step, activated by more energetic electrons and becoming evident at high doses, which increases the number of graphitic-like C-C bonds via the dissociation of adsorbates already contaminating the "as received" surface or accumulating on this surface during irradiation. Our results demonstrate how the kinetic energy of impinging electrons is a crucial parameter when conditioning technical surfaces of Cu and other metals by means of electron induced chemical processing.
description: 6 pages, contribution to the Joint INFN-CERN-EuCARD-AccNet Workshop on Electron-Cloud Effects: ECLOUD'12; 5-9 Jun 2012, La Biodola, Isola d'Elba, Italy; CERN Yellow Report CERN-2013-002, pp.99-104
Rheological and Electrical Transitions in Carbon Nanotube/Epoxy Suspensions
Creators: name: Allaoui, Aissa
name: Bounia, Nour-Eddine El
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The rheological and electrical properties of suspensions of carbon nanotubes in an uncured epoxy resin were investigated by means of shear rheology and impedance spectroscopy. It was found that above an onset CNT weight fraction (0.1 wt %), the steady viscosity increased with CNT loading and presented a shear thinning behaviour. The concentration dependence of viscosity changed from a power law to an exponential with increasing shear rate, indicating a loss of interaction between aggregates and CNT network breakage. The fluid-to-solidlike and insulator-to-conductor transitions occurred in the same CNT weight fraction range between 0.5 and 0.6 wt %. The correspondence of these transitions was explained by the reduction of contact resistance between CNT by stiffening of the CNT network leading to improved electronic transport.
Systematic of isovector and isoscalar giant quadrupole resonances in normal and superfluid deformed nuclei
Creators: name: Scamps, Guillaume
name: Lacroix, Denis
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The systematic study of isoscalar (IS) and isovector (IV) giant quadrupole responses (GQR) in normal and superfluid nuclei presented in [G. Scamps and D. Lacroix, Phys. Rev. 88, 044310 (2013)] is extended to the case of axially deformed and triaxial nuclei. The static and dynamical energy density functional based on Skyrme effective interaction are used to study static properties and dynamical response functions over the whole nuclear chart. Among the 749 nuclei that are considered, 301 and 65 are respectively found to be prolate and oblate while 54 do not present any symmetry axis. For these nuclei, the IS- and IV-GQR response functions are systematically obtained. In these nuclei, different aspects related to the interplay between deformation and collective motion are studied. We show that some aspects like the fragmentation of the response induced by deformation effects in axially symmetric and triaxial nuclei can be rather well understood using simple arguments. Besides this simplicity, more complex effects show up like the appearance of non-trivial deformation effects on the collective motion damping or the influence of hexadecapole or higher-orders effects. A specific study is made on the triaxial nuclei where the absence of symmetry axis adds further complexity to the nuclear response. The relative importance of geometric deformation effects and coupling to other vibrational modes are discussed.
description: 17 pages, 26 figures
Investigating independent subsets of graphs, with Mathematica
Creators: name: Codara, Pietro
name: D'Antona, Ottavio M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Software (cs.MS)
subject: Discrete Mathematics (cs.DM)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: With this work we aim to show how Mathematica can be a useful tool to investigate properties of combinatorial structures. Specifically, we will face enumeration problems on independent subsets of powers of paths and cycles, trying to highlight the correspondence with other combinatorial objects with the same cardinality. Then we will study the structures obtained by ordering properly independent subsets of paths and cycles. We will approach some enumeration problems on the resulting partially ordered sets, putting in evidence the correspondences with structures known as Fibonacci and Lucas Cubes.
ASSURED Business Cases
Creators: name: Bagliano, Valeria
name: Marchi, Francesca
name: Camisetti, Fabrizio
Publisher: name: Zenodo
Year: 2019

description: This deliverable defines the Business Cases identified in ASSURED, starting from the needs of the different stakeholders involved, i.e.
 cities, Public Transport Operators, Public Transport Authorities, Distribution Systems Operators, vehicle manufacturers and
 technological solutions suppliers.
Coffee Lectures zum FDM und Open Science (im Winter 2022)
Creators: name: Strauch-Davey, Annette
Publisher: name: Zenodo
Year: 2022
Subjects: FDM
Open Science
Forschungsdatenmanagement
Forschungsdaten
RDM
Research Data Management

description: Annette Strauch-Davey (FDM) lädt Sie zu einem geplanten Zoom-Meeting ein.

 Thema: Coffee Lecture Forschungsdatenmanagement, OVGU Magdeburg.
 Uhrzeit: Dies ist ein regelmäßig stattfindendes Meeting Jederzeit treffen

 Zoom-Meeting beitreten
 https://ovgu.zoom.us/j/67215151478

 Meeting-ID: 672 1515 1478
 Schnelleinwahl mobil
 +496950502596,,67215151478# Deutschland
 +496971049922,,67215151478# Deutschland

 Einwahl nach aktuellem Standort
 +49 695 050 2596 Deutschland
 +49 69 7104 9922 Deutschland
 Meeting-ID: 672 1515 1478
 Ortseinwahl suchen: https://ovgu.zoom.us/u/cdcU77taYL
TIPOS DE ERROS NA ESCRITA DE FORMATOS SILÁBICOS
Creators: name: Vicente, Francisco
Publisher: name: POLISSEMA – Revista de Letras do ISCAP
Year: 2019

description: Estudos já disponíveis demonstram dificuldades ortográficas em população de variados níveis de ensino, do básico ao universitário, e em diferentes variedades do Português (cf. Santos 2013; Veloso 2003, para Português europeu; Abaurre 2001; Miranda & Matzenauer 2010, para o Português do Brasil; Gonçalves & Vicente 2010, para o Português de Moçambique, entre outros). O presente estudo teve como objectivo descrever os tipos de erros na escrita de diferentes formatos silábicos (CV, V, CCV, CVC) por crianças moçambicanas do Ensino Básico (2ª, 3ª e 5ª classes), falantes do Português como L2 (língua segunda), cuja L1 (língua materna) é o Changana. Os dados foram recolhidos com base num ditado de imagens, com o qual as crianças foram solicitadas a escrever o nome de cada uma das imagens incluídas no ditado (cf. Santos 2013; Veloso 2003). As palavras testadas incluíam sílabas de diferentes formatos: V (asa), CV (faca), CCV (prato, blusa) e CVC (porta, balde, pasta). A análise dos dados recolhidos permitiu notar que, nos Ataques não ramificados, simples e vazio, os erros são raros. Na escrita do Ataque CR, o apagamento de C2 é o tipo de erro mais frequente. Porém, na escrita do Ataque CL, há um equilíbrio entre o apagamento de C2 e a epêntese de vogal. Na escrita dos três tipos de Codas (S, R e L), o apagamento da Coda é o tipo de erro mais frequente. Estes resultados estão, de uma forma geral, de acordo com a tendência atestada em estudos anteriores sobre a escrita em Português como língua materna (cf. Silva 2015; Veloso 2003). A vogal epentética por excelência na escrita das crianças moçambicanas avaliadas é . No entanto, no Ensino Básico português, a vogal epentética por excelência na grafia de formatos silábicos ramificados é (cf. Lourenço-Gomes, Rodrigues & Alves 2016; Santos 2013; Veloso 2003). Palavras-chave: Tipos de erros. Complexidade silábica. Crianças moçambicanas. Ensino Básico. L1 (Língua materna). L2 (Língua segunda).
description: POLISSEMA – Revista de Letras do ISCAP, No. 19 (2019)
On the radius of spatial analyticity for semilinear symmetric hyperbolic systems
Creators: name: Cappiello, Marco
name: D'Ancona, Piero
name: Nicola, Fabio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We study the problem of propagation of analytic regularity for semi-linear symmetric hyperbolic systems. We adopt a global perspective and we prove that if the initial datum extends to a holomorphic function in a strip of radius (=width) ε_0, the same happens for the solution u(t,.) for a certain radius ε(t), as long as the solution exists. Our focus is on precise lower bounds on the spatial radius of analyticity ε(t) as t grows. We also get similar results for the Schroedinger equation with a real-analytic electromagnetic potential.
description: 16 pages
A TRADUÇÃO INTERSEMIÓTICA EM «LOLITA» DE VLADIMIR NABOKOV E DE STANLEY KUBRIK
Creators: name: Veloso, Manuela
Publisher: name: POLISSEMA – Revista de Letras do ISCAP
Year: 2019

description: .
description: POLISSEMA – Revista de Letras do ISCAP, No. 1 (2001)
Statistics of Local Seismic Emission from the Solar Granulation
Creators: name: Lindsey, Charles
name: Donea, Alina
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We apply computational seismic holography to high-frequency helioseismic observations of the quiet Sun from SDO/HMI to locate predominant sources of seismic emission with respect to the structure of the solar granulation. The regions of greatest seismic emission are the edges of photospheric granules. Seismic emission from regions whose continuum brightnesses are 95-100% of the mean, as resolved by HMI, are about 2.5 times as emissive as regions whose brightnesses are 100-104% of the mean. The greater seismic emissivity from regions whose brightnesses are somewhat less than the mean is roughly in line with expectations from an understanding that attributes most seismic emission to cool plumes plummeting from the edges of granules. However, seismic emission from regions whose continuum brightnesses significantly exceed 104% of the mean is also remarkably high. This unexpected feature of high-frequency seismic emission from the solar granulation begs to be understood.
description: 6 pages, published, Eclipse on the Coral Sea: Cycle 24 Ascending (GONG 2012, LWS/SDO-5, and SOHO 27) IOP Publishing Journal of Physics: Conference Series 440 (2013) 012044
Documentation of the Elasticities Underlying the Current Grains, Oilseeds, and Livestock (GOL) Model
Creators: name: Bishop, Robert V.
name: Bishop, Robert V.
Publisher: name: Unknown
Year: 1980
Subjects: Demand and Price Analysis
Research Methods/ Statistical Methods

description: Excerpt from the paper: This paper presents all of the price elasticities currently contained in the World Grain, Oilseeds and Livestock (GOL) Model. The elasticities presented here differ from those listed in Alternative Futures for World Food in 1985, Volume 3 (FAER 151) since many of the intercept terms of the model’s equations have been adjusted as new information has become available. The first part of this paper describes the construction of the "synthesized coefficients" in each of the equations. The second part describes the effect of changing intercept terms on the assumed elasticities underlying the model.
Localization for a nonlinear sigma model in a strip related to vertex reinforced jump processes
Creators: name: Disertori, Margherita
name: Merkl, Franz
name: Rolles, Silke W. W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study a lattice sigma model which is expected to reflect Anderson localization and delocalization transition for real symmetric band matrices in 3D, but describes the mixing measure for a vertex reinforced jump process too. For this model we prove exponential localization at any temperature in a strip, and more generally in any quasi-one dimensional graph, with pinning (mass) at only one site. The proof uses a Mermin-Wagner type argument and a transfer operator approach.
description: 45 pages, 3 figures
O VEREDICTO, «DAS URTEIL», 1916, Franz Kafka
Creators: name: Guimarães, Maria Helena
name: Vilas-Boas, Gonçalo
Publisher: name: POLISSEMA – Revista de Letras do ISCAP
Year: 2019

description: POLISSEMA – Revista de Letras do ISCAP, No. 1 (2001)
The awakening of BL Lacertae: observations by Fermi, Swift, and the GASP-WEBT
Creators: name: Raiteri, C. M.
name: Villata, M.
name: D'Ammando, F.
name: Larionov, V. M.
name: Gurwell, M. A.
name: Mirzaqulov, D. O.
name: Smith, P. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Since the launch of the Fermi satellite, BL Lacertae has been moderately active at gamma-rays and optical frequencies until May 2011, when the source started a series of strong flares. The exceptional optical sampling achieved by the GLAST-AGILE Support Program (GASP) of the Whole Earth Blazar Telescope (WEBT) in collaboration with the Steward Observatory allows us to perform a detailed comparison with the daily gamma-ray observations by Fermi. Discrete correlation analysis between the optical and gamma-ray emission reveals correlation with a time lag of 0 +- 1 d, which suggests cospatiality of the corresponding jet emitting regions. A better definition of the time lag is hindered by the daily gaps in the sampling of the extremely fast flux variations. In general, optical flares present more structure and develop on longer time scales than corresponding gamma-ray flares. Observations at X-rays and at millimetre wavelengths reveal a common trend, which suggests that the region producing the mm and X-ray radiation is located downstream from the optical and gamma-ray-emitting zone in the jet. The mean optical degree of polarisation slightly decreases over the considered period and in general it is higher when the flux is lower. The optical electric vector polarisation angle (EVPA) shows a preferred orientation of about 15 deg, nearly aligned with the radio core EVPA and mean jet direction. Oscillations around it increase during the 2011-2012 outburst. We investigate the effects of a geometrical interpretation of the long-term flux variability on the polarisation. A helical magnetic field model predicts an evolution of the mean polarisation that is in reasonable agreement with the observations. These can be fully explained by introducing slight variations in the compression factor in a transverse shock waves model.
description: 17 pages, 17 figures, 1 table, accepted for publication in MNRAS
The efficiency of quantum tomography based on photon detection
Creators: name: Bogdanov, Yu. I.
name: Kulik, S. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a general methodology for efficient statistical reconstruction of a quantum state through collection and analysis of photon counting statistics. Our approach includes both strict quantitative criteria for adequacy and completeness of the statistical inverse problem, as well as a simple and reliable method for evaluating errors in the reconstructed state and approximation of a quantum state by means of the reduced finite-dimensional model.
An Elasticities Approach to Estimating Excess Demand in Price-Controlled Markets
Creators: name: Liefert, William M.
name: Liefert, William M.
Publisher: name: Unknown
Year: 1991
Subjects: Demand and Price Analysis
Research Methods/ Statistical Methods

description: This paper develops a method for estimating excess demand in markets where state-controlled prices are set below market-clearing levels. The estimation equations express excess demand as a function of price elasticities of supply and demand. Although the method is most appropriate for empirical work involving centrally planned economies, it is not specific to that system. The procedure is then used to calculate excess consumer demand for meat in the USSR during the 1980's. Our best defended results from sensitivity analysis suggest that in the late 80's close to one quarter of the total quantity demanded of meat at state prices was not satisfied by purchase.
José Saramago «Cadernos de Lanzarote - Diário V», 1998, pp. 52-3
Creators: name: Clara Sarmento E Turmas De Tradução De Textos Literários (Inglês)
Publisher: name: POLISSEMA – Revista de Letras do ISCAP
Year: 2019

description: POLISSEMA – Revista de Letras do ISCAP, No. 1 (2001)
W. B. YEATS «THE ROSE», 1893, e «The Tower», 1928
Creators: name: Clara Sarmento E Turmas De Tradução De Textos Literários (Inglês)
Publisher: name: POLISSEMA – Revista de Letras do ISCAP
Year: 2019

description: POLISSEMA – Revista de Letras do ISCAP, No. 1 (2001)
Twisted homological stability for extensions and automorphism groups of free nilpotent groups
Creators: name: Szymik, Markus
Publisher: name: arXiv
Year: 2014
Subjects: subject: Group Theory (math.GR)
subject: Algebraic Topology (math.AT)
subject: Geometric Topology (math.GT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics

description: We prove twisted homological stability with polynomial coefficients for automorphism groups of free nilpotent groups of any given class. These groups interpolate between two extremes for which homological stability was known before, the general linear groups over the integers and the automorphism groups of free groups. The proof presented here uses a general result that applies to arbitrary extensions of groups, and that has other applications as well.
description: 17 pages
Doping and critical-temperature dependence of the energy gaps in Ba(Fe_{1-x}Co_x)_2As_2 thin films
Creators: name: Pecchio, P.
name: Daghero, D.
name: Ummarino, G. A.
name: Kurth, F.
name: Holzapfel, B.
name: Iida, K.
name: Gonnelli, R. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The dependence of the superconducting gaps in epitaxial Ba(Fe_{1-x}Co_{x})_2As_2 thin films on the nominal doping x (0.04 \leq x \leq 0.15) was studied by means of point-contact Andreev-reflection spectroscopy. The normalized conductance curves were well fitted by using the 2D Blonder-Tinkham-Klapwijk model with two nodeless, isotropic gaps -- although the possible presence of gap anisotropies cannot be completely excluded. The amplitudes of the two gaps Δ_{S} and Δ_{L} show similar monotonic trends as a function of the local critical temperature T_{c}^{A} (measured in the same point contacts) from 25 K down to 8 K. The dependence of the gaps on x is well correlated to the trend of the critical temperature, i.e. to the shape of the superconducting region in the phase diagram. When analyzed within a simple three-band Eliashberg model, this trend turns out to be compatible with a mechanism of superconducting coupling mediated by spin fluctuations, whose characteristic energy scales with T_{c} according to the empirical law Ω_{0}= 4.65*k_{B}*T_{c}, and with a total electron-boson coupling strength λ_{tot}= 2.22 for x \leq 0.10 (i.e. up to optimal doping) that slightly decreases to λ_{tot}= 1.82 in the overdoped samples (x = 0.15).
description: 8 pages, 5 color figures
The Chemical Evolution of the Milky Way: the Three Infall Model
Creators: name: Micali, A.
name: Matteucci, F.
name: Romano, D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a new chemical evolution model for the Galaxy that assumes three main infall episodes of primordial gas for the formation of halo, thick and thin disk, respectively. We compare our results with selected data taking into account NLTE effects. The most important parameters of the model are (i) the timescale for gas accretion, (ii) the efficiency of star formation and (iii) a threshold in the gas density for the star formation process, for each Galactic component. We find that, in order to best fit the features of the solar neighbourhood, the halo and thick disk must form on short timescales (~0.2 and ~1.25 Gyr, respectively), while a longer timescale is required for the thin-disk formation. The efficiency of star formation must be maximum (10 Gyr-1) during the thick-disk phase and minimum (1 Gyr-1) during the thin-disk formation. Also the threshold gas density for star formation is suggested to be different in the three Galactic components. Our main conclusion is that in the framework of our model an independent episode of accretion of extragalactic gas, which gives rise to a burst of star formation, is fundamental to explain the formation of the thick disk. We discuss our results in comparison to previous studies and in the framework of modern galaxy formation theories.
description: 12 pages, 7 figures, accepted for publication in MNRAS
A PROBLEMÁTICA DA NÃO EQUIVALÊNCIA DAS FORMAS DE TRATAMENTO EM INGLÊS E PORTUGUÊS
Creators: name: F. Guimarães, Maria De Lurdes
Publisher: name: POLISSEMA – Revista de Letras do ISCAP
Year: 2019

description: .
description: POLISSEMA – Revista de Letras do ISCAP, No. 1 (2001)
ESTILÍSTICA (COGNITIVA) COMPARADA NO CURRÍCULO DISCIPLINAR DO CURSO DE TRADUÇÃO ESPECIALIZADA DO ISCAP
Creators: name: Fernandes, Joana
Publisher: name: POLISSEMA – Revista de Letras do ISCAP
Year: 2019

description: .
description: POLISSEMA – Revista de Letras do ISCAP, No. 1 (2001)
Soft X-ray reflectivity: from quasi-perfect mirrors to accelerator walls
Creators: name: Schäfers, F.
name: Cimino, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Reflection of light from surfaces is a very common, but complex phenomenon not only in science and technology, but in every day life. The underlying basic optical principles have been developed within the last five centuries using visible light available from the sun or other laboratory light sources. X-rays were detected in 1895, and the full potential of soft- and hard-x ray radiation as a probe for the electronic and geometric properties of matter, for material analysis and its characterisation is available only since the advent of synchrotron radiation sources some 50 years ago. On the other hand high-brilliance and high power synchrotron radiation of present-days 3rd and 4th generation light sources is not always beneficial. Highenergy machines and accelerator-based light sources can suffer from a serious performance drop or limitations due to interaction of the synchrotron radiation with the accelerator walls, thus producing clouds of photoelectrons (e-cloud) which in turn interact with the accelerated beam. Thus the suitable choice of accelerator materials and their surface coating, which determines the x-ray optical behaviour is of utmost importance to achieve ultimate emittance. Basic optical principles and examples on reflectivity for selected materials are given here.
description: 11 pages, contribution to the Joint INFN-CERN-EuCARD-AccNet Workshop on Electron-Cloud Effects: ECLOUD'12; 5-9 Jun 2012, La Biodola, Isola d'Elba, Italy; CERN Yellow Report CERN-2013-002, pp.105-115
On Roussel-Rubio-type lemmas and their consequences
Creators: name: Trotignon, Nicolas
name: Vušković, Kristina
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C17

description: Roussel and Rubio proved a lemma which is essential in the proof of the Strong Perfect Graph Theorem. We give a new short proof of the main case of this lemma. In this note, we also give a short proof of Hayward's decomposition theorem for weakly chordal graphs, relying on a Roussel--Rubio-type lemma. We recall how Roussel--Rubio-type lemmas yield very short proofs of the existence of even pairs in weakly chordal graphs and Meyniel graphs.
OS CONTRIBUTOS DA ANÁLISE DO DISCURSO PARA O ENSINO DA TRADUÇÃO
Creators: name: Ferreira Da Mota, Eduarda Maria
Publisher: name: POLISSEMA – Revista de Letras do ISCAP
Year: 2019

description: .
description: POLISSEMA – Revista de Letras do ISCAP, No. 1 (2001)
A cosmological bound on $e^+ e^-$ mass difference
Creators: name: Dolgov, A. D.
name: Novikov, V. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We demonstrate that CPT-violation due to $e^+ e^-$ mass difference generates a non-zero photon mass. As a result the cosmological bounds on the photon mass lead to the bounds on $e^+ e^-$ mass difference which are at least by 10 orders of magnitude stronger than the direct experimental bound.
description: 8 pages
Economic Issues Associated with Food Safety
Creators: name: Unnevehr, Laurian
name: Crutchfield, Stephen
name: Roberts, Tanya
name: Kuchler, Fred
name: Unnevehr, Laurian
name: Crutchfield, Stephen
name: Roberts, Tanya
name: Kuchler, Fred
Publisher: name: Unknown
Year: 1995
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Health Economics and Policy
subject: Risk and Uncertainty
subject: foodborne illness
subject: microbial pathogens
subject: cost of illness
subject: pesticide residues

description: This document outlines, in graphs and figures, ERS research findings about the incidence and costs of foodborne illness in meat and poultry, and exposure to pesticide residues on fresh fruit and vegetables. It was prepared as a briefing for staffs of the House and Senate Agriculture Committees.
The Question of Purpose in Music Theory: Description, Suggestion, and Explanation
Creators: name: Temperley, David
Publisher: name: Columbia University
Year: 2001
Subjects: Music

description: Is musical structure something in the mind of the listener, in which case its elucidation involves the
description of (perhaps unconscious) psychological processes and representations?
Or is it something that resides in the musical object itself perhaps, in large part, not normally part of the listener's hearing and experience, but revealed by the analyst with the aim of enhancing that
experience? Temperley explores the purpose and definition of music theory.
Seasonal differences in intestinal flora are related to rats’ intestinal water metabolism
Creators: name: Liu, Leilei
Publisher: name: figshare
Year: 2022
Subjects: Medical microbiology not elsewhere classified

description: To explore the correlation among seasonal factors and intestThe intestinal water metabolism was evaluated by determining the intestinal transmission function, fecal water content, water content of colonic tissue, and the colonic expression levels of AQP3, AQP4, and AQP8. The composition and relative abundance of intestinal microflora in rats in each season were assessed through 16SrDNA amplifier sequencing, and the relationship between the dominant flora and intestinal water metabolism in each season was analyzed using Spearman correlation analysis. inal water metabolism and intestinal flora, 20 Sprague Dawley (SD) rats were divided into spring, summer, autumn, and winter groups.
Towards Precise Ages and Masses of Free Floating Planetary Mass Brown Dwarfs
Creators: name: Canty, James
name: Lucas, Philip
name: Roche, Patrick
name: Pinfield, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Measurement of the substellar initial mass function (IMF) in very young clusters is hampered by the possibility of the age spread of cluster members. This is particularly serious for candidate planetary mass objects (PMOs), which have a very similar location to older and more massive brown dwarfs on the Hertzsprung-Russell Diagram (HRD). This degeneracy can be lifted by the measurement of gravity-sensitive spectral features. To this end we have obtained medium resolution (R~5000) Near-infrared Integral Field Spectrometer (NIFS) K band spectra of a sample of late M- / early L-type dwarfs. The sample comprises old field dwarfs and very young brown dwarfs in the Taurus association and in the Sigma Orionis cluster. We demonstrate a positive correlation between the strengths of the 2.21micron NaI doublet and the objects' ages. We demonstrate a further correlation between these objects' ages and the shape of their K band spectra. We have quantified this correlation in the form of a new index, the H2(K) index. This index appears to be more gravity-sensitive than the NaI doublet and has the advantage that it can be computed for spectra where gravity-sensitive spectral lines are unresolved, while it is also more sensitive to surface gravity at very young ages (<10 Myr) than the triangular H band peak. Both correlations differentiate young objects from field dwarfs, while the H2(K) index can distinguish, at least statistically, populations of ~1 Myr objects from populations of ~10 Myr objects. We applied the H2(K) index to NIFS data for one Orion nebula cluster (ONC) PMO and to previously published low resolution spectra for several other ONC PMOs where the 2.21micron NaI doublet was unresolved and concluded that the average age of the PMOs is ~1 Myr.
description: 17 pages, 13 figures
On a Family of Circulant Matrices for Quasi-Cyclic Low-Density Generator Matrix Codes
Creators: name: Baldi, Marco
name: Bambozzi, Federico
name: Chiaraluce, Franco
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We present a new class of sparse and easily invertible circulant matrices that can have a sparse inverse though not being permutation matrices. Their study is useful in the design of quasi-cyclic low-density generator matrix codes, that are able to join the inner structure of quasi-cyclic codes with sparse generator matrices, so limiting the number of elementary operations needed for encoding. Circulant matrices of the proposed class permit to hit both targets without resorting to identity or permutation matrices that may penalize the code minimum distance and often cause significant error floors.
description: 27 pages, 7 figures
The evolution of moment generating functions for the Wright Fisher model of population genetics
Creators: name: Tran, Tat Dat
name: Hofrichter, Julian
name: Jost, Juergen
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Mathematics
subject: FOS: Biological sciences
subject: 60J27, 60J60

description: We derive and apply a partial differential equation for the moment generating function of the Wright-Fisher model of population genetics.
The Kramers-Kronig relations for usual and anomalous Poisson-Nernst-Planck models
Creators: name: Evangelista, Luiz Roberto
name: Lenzi, Ervin Kaminski
name: Barbero, Giovanni
Publisher: name: arXiv
Year: 2013
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The consistency of the frequency response predicted by a class of electrochemical impedance expressions is analytically checked by invoking the Kramers-Kronig (KK) relations. These expressions are obtained in the context of Poisson-Nernst-Planck usual (PNP) or anomalous (PNPA) diffusional models that satisfy Poisson's equation in a finite-length situation. The theoretical results, besides being successful in interpreting experimental data, are also shown to obey the KK relations when these relations are modified accordingly
description: 11 pages, 2 Figures (1a and 1b)
Optimal Intelligent Control for Wind Turbulence Rejection in WECS Using ANNs and Genetic Fuzzy Approach
Creators: name: kasiri, Hadi
name: momeni, hamid reza
name: Kasiri, Atiyeh
Publisher: name: arXiv
Year: 2014
Subjects: subject: Systems and Control (eess.SY)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: One of the disadvantages in Connection of wind energy conversion systems (WECSs) to transmission networks is plentiful turbulence of wind speed. Therefore effects of this problem must be controlled. Nowadays, pitch-controlled WECSs are increasingly used for variable speed and pitch wind turbines. Megawatt class wind turbines generally turn at variable speed in wind farm. Thus turbine operation must be controlled in order to maximize the conversion efficiency below rated power and reduce loading on the drive-train. Due to random and non-linear nature of the wind turbulence and the ability of Multi-Layer Perceptron (MLP) and Radial Basis Function (RBF) Artificial Neural Networks (ANNs) in the modeling and control of this turbulence, in this study, widespread changes of wind have been perused using MLP and RBF artificial NNs. In addition in this study, a new genetic fuzzy system has been successfully applied to identify disturbance wind in turbine input. Thus output power has been regulated in optimal and nominal range by pitch angle regulation. Consequently, our proposed approaches have regulated output aerodynamic power and torque in the nominal rang.
description: International journal of soft computing & soft engineering 2012
Double-discrete solitons in fishnet arrays of optical fibers
Creators: name: Staliunas, Kestutis
name: Malomed, Boris
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We demonstrate that crossed arrays of optical fibers support the double-discrete linear and nonlinear propagation of light beams, in which not only the transverse coordinate (the fiber's number) is discrete, but also the longitudinal (propagation) coordinate, i.e., the number of the fiber-crossing site, is effectively discrete too. In the linear limit, this transmission regime features double-discrete self-collimation. The nonlinear fishnet arrays with both focusing and defocusing nonlinearities give rise to double-discrete spatial solitons. Solitons bifurcating from two different branches of the linear dispersion relation feature strong interactions and form composite states. In the continuum limit, the model of the nonlinear fishnet reduces to a system of coupled-mode equations similar to those describing Bragg gratings, but without the cross-phase-modulation terms.
description: Physical Review E, in press
Statistics of weighted Poisson events and its applications
Creators: name: Bohm, G.
name: Zech, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Methodology (stat.ME)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The statistics of the sum of random weights where the number of weights is Poisson distributed has important applications in nuclear physics, particle physics and astrophysics. Events are frequently weighted according to their acceptance or relevance to a certain type of reaction. The sum is described by the compound Poisson distribution (CPD) which is shortly reviewed. It is shown that the CPD can be approximated by a scaled Poisson distribution (SPD). The SPD is applied to parameter estimation in situations where the data are distorted by resolution effects. It performs considerably better than the normal approximation that is usually used. A special Poisson bootstrap technique is presented which permits to derive confidence limits for observations following the CPD.
description: 14 pages, 2 figures
Quality, impact, productivity: Researchers' conceptions of bibliometric indicators and altmetrics
Creators: name: Sachse, Jacqueline
name: Leckert, Max
Publisher: name: Zenodo
Year: 2022
Subjects: bibliometrics
altmetrics
research quality
impact
science studies

description: Bibliometric measures are increasingly used in academic funding and hiring situations. Although rather vaguely described as “impact” or “performance” indicators, they often appear to be equaled with research quality. Altmetrics challenge established bibliometric evaluation concepts by promoting alternative notions of impact: Attention, visibility or societal relevance are some of the concepts that may be used to charge metrics with value and thus add to the many dimensions of quality. Research quality, however, is a hard to define concept. Researchers are likely to express different understandings of quality, influenced by their fields’ shared epistemic and cultural beliefs. Evaluative contexts that make use of indicators often crucially determine researchers’ career paths. They can thus be assumed to affect researchers’ conceptions of quality and consequently shape the way research is conducted, communicated and received. We argue that in order to use metrics responsibly, we need to understand the relation between quality and indicators. However, research in this regard is limited. Several survey and interview studies have investigated the use of and opinions on metrics by researchers from different fields and career levels (Aksnes & Rip, 2009; Aubert Bonn & Pinxten, 2021a, 2021b; Hammarfelt & Haddow, 2018; Langfeldt et al., 2021; Lemke et al., 2019; Ma & Ladisch, 2019). Their findings suggest which indicators researchers use for peer evaluation or self-marketing, and reasons for objecting the usage of indicators, such as limitations of the indicators’ validity or reactive effects on publishing practices. Hammarfelt & Haddow (2018) showed that scholars in the humanities experience that indicators do not reflect their understanding of quality. While humanities are known to be disadvantaged in bibliometric analyses, our study lays emphasis on the use of indicators with respect to different notions of quality outside the humanities. It explores how researchers in the life sciences assess and prioritize different bibliometric measures and altmetric data in terms of their suitability for evaluating scientific work. What are researchers’ conceptions of bibliometric and altmetric indicators regarding research quality? How is quality related to notions of impact and productivity?
Gluon fragmentation into S-wave heavy quarkonium
Creators: name: Nejad, S. Mohammad Moosavi
name: Mahdi, Delpasand
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Fragmentation is the dominant production mechanism for heavy hadronic bound states with large transverse momentum. We numerically calculate the initial $g\rightarrow H(Q\bar{Q})$ fragmentation functions (FFs) using the nonrelativistic QCD factorization approach. Our analytical expression of FFs depends on both the momentum fraction $z$ and the transverse momentum of the gluon, and contains most of the kinematical and dynamical properties of the process. Specifically, using the perturbative QCD we present the FF for a gluon to split into $S$-wave charmonium meson $H_c$ to leading order in the QCD coupling constant.
description: 7 pages, 5 figures. arXiv admin note: text overlap with arXiv:1307.6351
Least Entropy-Like Approach for Reconstructing L-Shaped Surfaces Using a Rotating Array of Ultrasonic Sensors
Creators: name: Giannoccaro, Nicola Ivan
name: Indiveri, Giovanni
name: Spedicato, Luigi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper introduces a new algorithm for accurately reconstructing two smooth orthogonal surfaces by processing ultrasonic data. The proposed technique is based on a preliminary analysis of a waveform energy indicator in order to classify the data as belonging to one of the two flat surfaces. The following minimization of a nonlinear cost function, inspired by the mathematical definition of Gibbs entropy, allows to estimate the plane parameters robustly with respect to the presence of outlying data. These outliers are mainly due to the effect of multiple reflections arising in the surfaces intersection region. The scanning system consists of four inexpensive ultrasonic sensors rotated by means of a precision servo digital motor in order to obtain distance measurements for each orientation. Experimental results are presented and compared with the classic Least Squares Method demonstrating the potentiality of the proposed approach in terms of precision and reliability.
description: 15 pages, 15 figures
The effects of soluble dietary fibers on glycemic response: an overview and futures perspectives
Creators: name: GIUNTINI, Eliana Bistriche
name: Hoffmann Sarda, Fabiana Andrea
name: MENEZES, Elizabete Wenzel de
Publisher: name: University of Limerick
Year: 2023
Subjects: classificationCode: 40
subject: Engineering

description: The properties of each food, composition, and structure affect the digestion and absorption of nutrients. Dietary fiber (DF), especially viscous DF, can contribute to a reduction in the glycemic response resulting from the consumption of carbohydrate-rich foods. Target and control of post-prandial glycemic values are critical for diabetes prevention and management. Some mechanisms have been described for soluble DF action, from the increase in chyme viscosity to the production of short-chain fatty acids resulting from fermentation, which stimulates gastrointestinal motility and the release of GLP-1 and PYY hormones. The postprandial glycemic response due to inulin and resistant starch ingestion is well established. However, other soluble dietary fibers (SDF) can also contribute to glycemic control, such as gums, β-glucan, psyllium, arabinoxylan, soluble corn fiber, resistant maltodextrin, glucomannan, and edible fungi, which can be added alone or together in different products, such as bread, beverages, soups, biscuits, and others. However, there are technological challenges to be overcome, despite the benefits provided by the SDF, as it is necessary to consider the palatability and maintenance of their proprieties during production processes. Studies that evaluate the effect of full meals with enriched SDF on postprandial glycemic responses should be encouraged, as this would contribute to the recommendation of viable dietary options and sustainable health goals.
A PROBLEMÁTICA DA TRADUÇÃO NO CURSO DE LÍNGUAS E SECRETARIADO DO ISCAP
Creators: name: Rapenne Botelho, Annette Pierrette
name: Monteiro Martins De Almeida, Maria José
Publisher: name: POLISSEMA – Revista de Letras do ISCAP
Year: 2019

description: .
description: POLISSEMA – Revista de Letras do ISCAP, No. 1 (2001)
Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field
Creators: name: Sallen, G.
name: Kunz, S.
name: Amand, T.
name: Bouet, L.
name: Kuroda, T.
name: Mano, T.
name: Paget, D.
name: Krebs, O.
name: Marie, X.
name: Sakoda, K.
name: Urbaszek, B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Optical and electrical control of the nuclear spin system allows enhancing the sensitivity of NMR applications and spin-based information storage and processing. Dynamic nuclear polarization in semiconductors is commonly achieved in the presence of a stabilizing external magnetic field. Here we report efficient optical pumping of nuclear spins at zero magnetic field in strain free GaAs quantum dots. The strong interaction of a single, optically injected electron spin with the nuclear spins acts as a stabilizing, effective magnetic field (Knight field) on the nuclei. We optically tune the Knight field amplitude and direction. In combination with a small transverse magnetic field, we are able to control the longitudinal and transverse component of the nuclear spin polarization in the absence of lattice strain i.e. nuclear quadrupole effects, as reproduced by our model calculations.
description: 8 pages, 3 figures
ElectricSafetyInterlock
Creators: name: Pauw, Brian Richard
name: Smales, Glen-Jacob
Publisher: name: figshare
Year: 2023
Subjects: Electrical circuits and systems

description: Schematics, pictures, parts list and documents for an electric safety interlock (ESI). Disclaimer While this particular safety interlock design and execution has been approved by our local electronics department, rules and regulations in your area might differ. The functionality and reliability is also dependent on the build quality. The original designers hold no responsibility or liability for (modified) copies built elsewhere. Use at your own risk. General aim This interlock is designed to prevent electrical shock from high voltage (>60V) equipment.
 While the general safety interlock can be generically applied, this particular example employs an external vacuum-activated switch. It is for safeguarding human operations inside a vacuum sample chamber while the chamber doors are open. The circuit is closed (output is active) when a sufficient level of vacuum is reached, i.e. when all accessible openings are necessarily closed. The initial application is to interrupt power to a 220V, 250W heating cartridge (itself mounted inside a small sample holder with potentially exposed contacts) when the sample chamber is open.
 The external circuit can be modified to use different interlock mechanisms as needed. Note that the external interlock circuit is only a single circuit (with two signal lines) and thus is not protected against external shorts.
 To accomodate a range of safety interlocks, the 4-pin M12 connector is wired as follows: Pin 1 (Brown): +24V for power supply, max current 0.6A Pin 2 (White): Safety interlock system signal 1 (0 or 24V) Pin 3 (Blue) : Safety interlock system signal 2 (0 or 24V) Pin 4 (Black): 0V for power supply
 The safety is interlocked (output active) when both signal pins are set high (24V), with sufficient current to activate the two relays. Pin 1 and 4 can be used to power safety hardware (such as light curtains or proximity detectors) with 24VDC up to a current of 0.6A. A larger power supply can be installed when higher currents are needed, while staying within the current limits imposed by the wiring cross-section. Lights and indicators during operation The green signal lamp indicates that the ESI is operational.
 The orange signal lamp indicates that the output is active (safety circuit closed, relays on, 230V supplied).
 An extra warning light (red) is connected in such a way that, if the relays are in an unequal state, and if 230V is supplied on the interlocked circuit, the RED signal lamp lights up. This can happen when the signal cable is incorrectly wired or broken, or when one of the relays is welded closed and needs replacing.
 The power switch (red) at the back of the device indicates that power is supplied to the 24V side of the circuit.