cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Simulation der Strömung im Windkanal und Labor
Creators: name: Stojanovic, Ivo
Publisher: name: TU Wien
Year: 2019
Subjects: subject: CFD
subject: Strömungsmessung
subject: Windkanal
subject: CFD
subject: flow measurement
subject: wind tunnel

description: Für den Windkanal am Institut für Strömungsmechanik und Wärmeübertragung wird in dieser Arbeit die Luftströmung mittels geeigneter CFD-Programme simuliert. Neben diesem Niedergeschwindigkeitswindkanal wird auch der umgebende Raum, in welchem der Windkanal steht, in der Simulation berücksichtigt. Außerdem soll ein Überblick über die verschiedenen Windkanalarten gegeben werden. Es werden zwei Modelle zur Veranschaulichung des Strömungsproblems erstellt,welche sich in ihrer Komplexität unterscheiden. Während im ersten Modell starke Vereinfachungen getroffen wurden, soll das zweite Modell der Realität möglichst genau entsprechen. Durch den Vergleich beider Modelle soll der Effekt der vereinfachenden Modellannahmen visualisiert werden. Um die zum Rechengebiet proportionale Rechenzeit möglichst gering zu halten, wird die vorliegende turbulente Strömung mit Hilfe eines Turbulenzmodells beschrieben. Darüber hinaus wurden im Windkanal Geschwindigkeitsmessungen bei verschiedenen Drehzahlen durchgeführt, um eine quantitative Gegenüberstellung mit beiden Modellen zu ermöglichen. Nach ausführlicher Analyse der Ergebnisse wird ein Ausblick auf weiterführende Arbeiten gegeben.
description: The airflow through the wind tunnel of the Institute of Fluid Mechanics and Heat Transfer will be simulated using CFD-programs. The surrounded room, in which the low speed wind tunnel is located, will be considered in the simulations as well. Furthermore an overview of different types of wind tunnels will be given. Two models of different complexity will be designed in order to illustrate the flow of the considered problem. While the first model is strongly simplified, the second model should conform to the reality as much as possible. Due to the comparison of both models the effect of the assumptions of the simplified model can be visualized. The computational time is proportional to the computational area and should be as small as possible. Therefor the present turbulent flow will be described with an appropriate turbulence model. Beyond that velocity measurements will be done in order to enable a comparison with the two models. After a detailed analysis of the results an outlook of possible continuative work will be given.
title: Towards the total synthesis of providencin
Creators: name: Steinacher, Michael
Publisher: name: TU Wien
Year: 2019
Subjects: subject: total synthesis
subject: providencin

description: Providencin is a highly oxygenated diterpenoid found in the sea plume Antillogorgia Kallos. It features a previously undescribed bicyclo[12.2.0]undecane carbon skeleton containing a tetrasubstituted cyclobutane ring, two trans-fused epoxides and a butenolide moiety. The absolute configuration of providencin remains to be proven. Biological testing revealed modest cytotoxic activity against several human cancer cell lines. This work presents the synthesis of an important building block en route to providencin based on a new retrosynthetic approach. Key steps are an enantioselective Lewis acid-catalyzed cycloaddition reaction to form the cyclobutane ring, a copper-assisted Stille-coupling under very mild conditions and the regioselective deprotection of just one of two trityl protecting groups.
Additional file 1 of Predictive model of multiple emergency department visits among adults: analysis of the data from the National Survey of Drug Use and Health (NSDUH)
Creators: name: Bobashev, Georgiy
name: Warren, Lauren
name: Li-Tzy Wu
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Biotechnology
Science Policy

description: Additional file 1: Table A1. Sociodemographic characteristics, substance use behaviors, mental health issues, and prevalence of ED visits in the past 12 months among adults in the national sample of the NSDUH.
Two-magnon Raman scattering in spin-ladders with exact singlet-rung ground state
Creators: name: Bibikov, P. N.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We suggest a family of spin-ladder models with exact singlet-rung vacuum. In addition to the terms describing interactions along legs and rungs the Hamiltonian has frustration and cyclic terms. Using coordinate Bethe ansatze all one- and two-dimensional states are constructed. The explicit formula for zero-temperature Raman scattering cross section is derived. The corresponding line-shapes are strongly asymmetric and have no more than one van-Hove singularity. The results are in good agreement with experimental data.
description: 10 pages, 1 figure
Large-scale patterns of forest fire occurrence in the conterminous United States, Alaska, and Hawaii, 2015
Creators: name: Potter, Kevin
Publisher: name: figshare
Year: 2020
Subjects: subject: 70505 Forestry Pests, Health and Diseases
subject: FOS: Agriculture, forestry and fisheries
subject: 70503 Forestry Fire Management

description: Potter, K.M. 2017. Large-scale patterns of forest fire occurrence in the conterminous United States, Alaska, and Hawaii, 2015. Chapter 3 in K.M. Potter and B.L. Conkling, eds., Forest Health Monitoring: National Status, Trends and Analysis, 2016. General Technical Report SRS-222. Asheville, North Carolina: U.S. Department of Agriculture, Forest Service, Southern Research Station. p. 43-62.

Forest fire occurrence outside the historic range of frequency and intensity can result in extensive economic and ecological impacts. The detection of regional patterns of fire occurrence density can allow for the identification of areas at greatest risk of significant impact and for the selection of locations for more intensive analysis. In 2015, the number of satellite-detected forest fire occurrences recorded for the conterminous States was the lowest since 2011. Ecoregions in the interior of the Pacific Northwest States, and near the coast of northwestern California and southeastern Oregon experienced the most fires per 100 km2 of forested area. Geographic hot spots of high fire occurrence density were detected in these same areas. Ecoregions in the Pacific Northwest, the Great Lakes States, and the Northeast experienced greater fire occurrence density than normal compared to the 12-year mean and accounting for variability over time. Alaska experienced moderately high fire occurrence densities in the interior of the State, but low densities elsewhere. The Big Island of Hawai‘i experienced very high fire occurrence density as a result of an ongoing volcanic eruption.
A ATUAÇÃO DAS ORGANIZAÇÕES DA CÂMARA SETORIAL DA CADEIA PRODUTIVA DO LEITE NA GARANTIA DA QUALIDADE DO PRODUTO EM MATO GROSSO DO SUL
Creators: name: Bacarji, Alencar Garcia
name: Sauer, Leandro
name: Bacarji, Alencar Garcia
name: Sauer, Leandro
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agricultural and Food Policy
subject: Câmara setorial
subject: organizações
subject: garantia de qualidade.

description: Objetivou-se, neste estudo, foi examinar o papel das organizações que atuam na Câmara Setorial da Cadeia Produtiva do Leite, no estado de Mato Grosso do Sul (CSCPLMS) para garantir a qualidade do leite produzido no Estado. Especificamente, pretende-se identificar quais os fatores determinantes para a garantia da qualidade do leite no Estado e, se a CSCPLMS é considerada pelos seus membros como um agente coordenador dessa cadeia de produção. Para atender tais objetivos, foi realizada uma pesquisa aplicada com abordagem qualitativa e quantitativa. Em relação aos seus objetivos, caracteriza-se por uma abordagem descritiva exploratória, revelando um referencial teórico abrangente, e ao mesmo tempo, peculiar ao estado de MS. Os resultados revelam que a matéria-prima da maioria das indústrias de laticínios do Estado é oriunda de pequenos produtores constatando-se que não há por parte das organizações, ações efetivas voltadas a essa classe de produtores, bem como ações desenvolvidas pelas indústrias visando assegurar a qualidade da matéria-prima. Destaca-se a baixa atuação e representação das organizações nos elos transporte, distribuição e comercialização do produto. Além disso, verifica-se que poucas organizações a reconhecem como coordenadora dessa cadeia de produção.
Pressure-induced suppression of ferromagnetism in the itinerant ferromagnet LaCrSb$_3$
Creators: name: Brubaker, Z. E.
name: Harvey, J. S.
name: Badger, J. R.
name: Ullah, R. R.
name: Campbell, D. J.
name: Xiao, Y.
name: Chow, P.
name: Kenney-Benson, C.
name: Smith, J. S.
name: Reynolds, C.
name: Paglione, J.
name: Zieve, R. J.
name: Jeffries, J. R.
name: Taufour, V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have performed an extensive pressure-dependent structural, spectroscopic, and electrical transport study of LaCrSb$_3$. The ferromagnetic phase (T$_C$ = 120 K at p = 0 GPa) is fully suppressed by p = 26.5 GPa and the Cr-moment decreases steadily with increasing pressure. The unit cell volume decreases smoothly up to p = 55 GPa. We find that the bulk modulus and suppression of the magnetism are in good agreement with theoretical predictions, but the Cr-moment decreases smoothly with pressure, in contrast to steplike drops predicted by theory. The ferromagnetic ordering temperature appears to be driven by the Cr-moment.
description: 8 pages, 8 figures
214 MOURA, M.L.C. de & HONÓRIO, L.C. Organizações Rurais & Agroindustriais, Lavras, v. 13, n. 2, p. 214-226, 2011 DETERMINANTES MOTIVACIONAIS E ESTRATÉGICOS DO COMPORTAMENTO EXPORTADOR DE UMA EMPRESA MINEIRA DO SETOR ALIMENTÍCIO
Creators: name: Moura, Magno Luiz Coelho De
name: Honorio, Luiz Carlos
name: Moura, Magno Luiz Coelho De
name: Honorio, Luiz Carlos
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Internacionalização
subject: negócios internacionais
subject: comportamento exportador
subject: motivação internacional e processo de formação estratégica.

description: Objetivou-se, neste artigo, analisar aspectos facilitadores e dificultadores do comportamento exportador de uma empresa mineira do setor alimentício, tendo em vista a teoria sobre aspectos motivacionais e estratégicos da internacionalização da firma. Reconhece-se que tais aspectos estão interligados e que eles podem revelar o modo como as atividades internacionais são realizadas em diferentes mercados estrangeiros. O artigo pode ser caracterizado como um estudo de caso que utilizou a entrevista semiestruturado como a principal técnica de levantamento de dados. Foram entrevistados dois diretores da empresa exportadora e uma diretora da trading company responsável pelas atividades de exportação da empresa pesquisada. Pelos resultados percebe-se que, apesar da exportadora participante do estudo manifestar aspirações e expectativas gerenciais com a possibilidade de obter lucros com os negócios no exterior, esse aspecto não se mostra alinhado a certas características organizacionais importantes para o desempenho exportador bem sucedido, isto é, experiência internacional, comprometimento de recursos e estratégias de marketing internacional.
Threat perception and the role of security entrepreneurs explaining the reinforcement of the US-Japan alliance since 1995
Creators: name: Omukai, Asako
Publisher: name: University of British Columbia
Year: 2009

description: The US-Japan alliance and security cooperation between Japan and the US has been visibly strengthened since the middle of the 1990s. It is often argued that this strengthening of the alliance took place in response to growing security threats in the region. This thesis argues that security threats alone do not provide a sufficient explanation, and proposes an alternative explanation for the strengthening of the alliance. The alliance has been strengthened by domestic actors who used regional threats as opportunities to achieve their goals, which are different from the strengthening of the alliance itself. They attributed the need for security cooperation with the US to growing security threats in the region, and tried to pursue their real goal through the strengthening of the alliance. In particular, a coalition of three types of domestic actors (traditional nationalists, the staff of the Prime Minister's Office, and the Ministry of Foreign Affairs) has formed in the late 1990s. I named these actors "security entrepreneurs." The strengthening of the US-Japan alliance has become a focal point for cooperation among these domestic actors who are pursuing their own domestic goals in the process.
Spin-Hall conductivity due to Rashba spin-orbit interaction in disordered systems
Creators: name: Chalaev, Oleg
name: Loss, Daniel
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider the spin-Hall current in a disordered two-dimensional electron gas in the presence of Rashba spin-orbit interaction. We derive a generalized Kubo-Greenwood formula for the spin-Hall conductivity $σ$ and evaluate it in an systematic way using standard diagrammatic techniques for disordered systems. We find that in the diffusive regime both Boltzmann and the weak localization contributions to $σ$ are of the same order and vanish in the zero frequency limit. We show that the uniform spin current is given by the total time derivative of the magnetization from which we can conclude that the spin current vanishes exactly in the stationary limit. This conclusion is valid for arbitrary spin-independent disorder, external electric field strength, and also for interacting electrons.
description: sec. VI is extended
JAMIYAT RIVOJIDA G'OYALARNING ORNI
Creators: name: Sultamuratov, Azamat
Publisher: name: Zenodo
Year: 2025

description: Ushbu maqolada jamiyatdagi g'oyalarning orni, shakllanishi va rivoji haqida so'z boradi. Jamiyat rivojida g‘oyalarning ta’sirini tasdiqlovchi tarixiy va zamonaviy ko'rinishlari ham bayon qilingan.
Single-electron operation of a silicon-CMOS 2x2 quantum dot array with integrated charge sensing
Creators: name: Gilbert, Will
name: Saraiva, Andre
name: Lim, Wee Han
name: Yang, Chih Hwan
name: Laucht, Arne
name: Bertrand, Benoit
name: Rambal, Nils
name: Hutin, Louis
name: Escott, Christopher C.
name: Vinet, Maud
name: Dzurak, Andrew S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The advanced nanoscale integration available in silicon complementary metal-oxide-semiconductor (CMOS) technology provides a key motivation for its use in spin-based quantum computing applications. Initial demonstrations of quantum dot formation and spin blockade in CMOS foundry-compatible devices are encouraging, but results are yet to match the control of individual electrons demonstrated in university-fabricated multi-gate designs. We show here that the charge state of quantum dots formed in a CMOS nanowire device can be sensed by using floating gates to electrostatically couple it to a remote single electron transistor (SET) formed in an adjacent nanowire. By biasing the nanowire and gates of the remote SET with respect to the nanowire hosting the quantum dots, we controllably form ancillary quantum dots under the floating gates, thus enabling the demonstration of independent control over charge transitions in a quadruple (2x2) quantum dot array. This device overcomes the limitations associated with measurements based on tunnelling transport through the dots and permits the sensing of all charge transitions, down to the last electron in each dot. We use effective mass theory to investigate the necessary optimization of the device parameters in order to achieve the tunnel rates required for spin-based quantum computation.
description: 12 pages and 6 figures, including supplementary material
PRODUÇÃO DE BIODIESEL E ÓLEO VEGETAL NO BRASIL: REALIDADE E DESAFIO
Creators: name: Osaki, Mauro
name: Batalha, Mario Otavio
name: Osaki, Mauro
name: Batalha, Mario Otavio
Publisher: name: Unknown
Year: 2011
Subjects: subject: Crop Production/Industries
subject: Biodiesel
subject: produção de biodiesel e óleo vegetal.

description: O governo e a sociedade têm debatido a matriz energética do país com a intenção de identificar alternativas aos derivados de petróleo como fonte de energia. O biodiesel (BD) tem sido considerado mais promissor para substituir parte do diesel fóssil consumido no Brasil. A produção do BD permitiria a obtenção de ganhos ambientais e poderia servir como instrumento de inclusão social de pequenos produtores rurais de regiões menos favorecidas. Mas, para que esses objetivos sejam alcançados, é necessário que essa produção seja sustentável a partir das principais matérias-primas disponíveis no país. O trabalho analisou o potencial de produção e inclusão do BD no diesel nas cinco regiões geográficas brasileiras. Para isso, por meio do estudo de caso descritivo, foram determinados dois cenários de oferta de óleo vegetal para a produção de BD. No primeiro cenário toda a produção de óleo vegetal seria destinada para a produção de BD. Em outro cenário somente o óleo exportado seria alocado para a fabricação de BD. No primeiro, a produção total de óleo vegetal transformada em biodiesel atenderia à lei n. 11.097 em todas as regiões pesquisadas. No segundo cenário, a produção exportada indicou que as regiões Centro-oeste e Sul poderiam atender ao Programa Nacional de Produção e Uso de BD (PNPB) e as demais regiões não apresentaram resultados capazes de cumprir a mistura obrigatória de 2% de BD no diesel.
title: Optimisation of processing parameters of a laboratory extrusion press for the application in Aluminium alloys
Creators: name: Ziegler, Martin
Publisher: name: TU Wien
Year: 2019
Subjects: subject: Strangpressen
subject: Mikrostruktur
subject: extrusion
subject: microstructure

description: Die Extrusion von Aluminiumlegierungen, speziell die der 6xxx-Serie, ist ein weit verbreiteter inudstrieller Prozess um Leichtbauprodukte komplexer Geometrien herzustellen. Es gibt dabei eine Vielzahl an Prozessparametern die eine Auswirkung auf die Produktqualität bestitzen. Ziel dieser Arbeit ist es, die essentiellen Parameter der Laborstrangpresse zu optimieren und so eine vollständige Prozesskette zu erschaffen, mit der eine Produktion Labormaß ermöglicht wird die einen Vergleich zu industriellen Standards zulässt und außerdem eine Quelle für Input-Variablen zur Gefüge-Simulation bietet. In experimentellen Tests mit Bolzen der Legierung AW6082 konnte die Aufheizcharakteristik des Laborofens untersucht und eine Routine für die Bolzen-Vorwärmung etabliert werden. Vier unterschiedliche Werkzeuggeometrien wurden auf deren Funktionalität überprüft. Deren Effektivität um eine feinfasrige Mikrostruktur zu schaffen wurde untersucht und deren Verpressungsverhältnisse wurden evaluiert. Das Gefüge der Extrusionsprodukte wurde lichtmikroskopisch analysiert. Weiters wurde der Einfluss verschiedener nachfolgender Wärmebehandlungen auf die Härte evaluiert. Es konnte gezeigt werden, dass eine Variation der Bolzenvorwärmung im Temperaturbereich von 420 bis 540C nur geringe Auswirkungen auf die Endhärte hatte, dass jedoch eine nachfolgende Lösungsglühung mit Warmauslagerung die Brinellhärte deutlich anhob.
description: Extrusion of aluminium alloys, especially the 6xxx alloys, is a widely used industrial process to manufacture lightweight products of complex geometries. There are numerous process parameters that have an impact on end product quality. The goal of this thesis is to optimize the essential parameters for a laboratory extrusion press in order to generate a whole process chain that allows scaled down production as a reference to industrial processes and as an efficient source for the extraction of input parameters for microstructural modelling. In an experimental series with billets of AW6082 alloy, heating characteristics of the laboratory oven prior to extrusion were tested and a pre-heating routine for the billets is established. Four different die geometries were tested on their functionality. Their effectiveness for a fine microstructure and their extrusion ratios were evaluated. The microstructure of extrudates was analysed using light optical microscopy. Furthermore, the influence on hardness of different thermal treatments after extrusion was evaluated. It could be shown, that variation of billet pre-heating in a temperature range from 420 to 540C has only a minor impact on end product hardness, but that a subsequent solution annealing and artificial ageing step increases Brinell hardness significantly.
Crosscap number and knot projections
Creators: name: Ito, Noboru
name: Takimura, Yusuke
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We introduce an unknotting-type number of knot projections that gives an upper bound of the crosscap number of knots. We determine the set of knot projections with the unknotting-type number at most two, and this result implies classical and new results that determine the set of alternating knots with the crosscap number at most two.
description: 20 pages, 20 figures
VIBRATION ANALYSIS OF ALUMINUM CANTILEVER BEAM SOLID CROSS
Creators: name: Ibrahim, Bahaa
Publisher: name: figshare
Year: 2020
Subjects: subject: Aerospace Engineering
subject: FOS: Mechanical engineering
subject: 90599 Civil Engineering not elsewhere classified
subject: FOS: Civil engineering
subject: Mechanical Engineering

description: The aim of this technical report is to make a vibration analysis of an
aluminum cantilever beam with solid rectangular cross-section under concentrated
load. The continuous systems’ vibration analysis conduct partial differential equations
have to be solved; there are three options to solve the continuous system, which are,
Exact solution, Approximated solution, and Finite Element Method in which in this
report I will call the three of them to solve the main problem of the report. FEA in
Ansys software using the Finite Element Method concept will be used here to solve the
continuous system. Free Vibration in which a force applied initially and structure
vibrates at its natural frequencies on the other side Forced Vibration a force applied
repeatedly to a mechanical system.
Additional file 1 of A smartphone ocular alignment measurement app in school screening for strabismus
Creators: name: Wenbo Cheng
name: Lynn, Marissa H.
name: Shrinivas Pundlik
name: Almeida, Cheryl
name: Luo, Gang
name: Houston, Kevin
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Science Policy

description: Additional file 1.
ANÁLISE SWOT DO SISTEMA AGROINDUSTRIAL DO AMENDOIM NA REGIÃO DE TUPÃ E MARÍLIA – SP
Creators: name: Joao, Iraci De Souza
name: Lourenzani, Wagner Luiz
name: Joao, Iraci De Souza
name: Lourenzani, Wagner Luiz
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Research Methods/ Statistical Methods
subject: Sistema Agroindustrial
subject: amendoim
subject: competitividade
subject: análise SWOT.

description: O amendoim (Arachis Hypogaea) é uma oleaginosa consumida mundialmente, sendo a quarta mais cultivada. No Brasil, essa cultura já ocupou posição de destaque, mas atualmente o país é apenas o 19° produtor mundial. O estado de São Paulo é responsável por aproximadamente 78% da produção nacional, possuindo duas grandes regiões produtoras. Procura-se, no presente estudo, analisar o Sistema Agroindustrial do Amendoim na região de Tupã e Marília, devido a grande representatividade desse local na produção e industrialização. Com base em uma pesquisa exploratória realizada com produtores rurais da região, cooperativas, indústrias de alimentos e instituições de apoio regional, foram descritas as principais características do agronegócio regional do amendoim e sistematizadas por meio da metodologia de análise SWOT (Strenghs, Weaknesses, Opportunities and Threats). Pelas análises realizadas comprovou-se que a cultura está em fase de transição e que, embora existam sérios problemas a serem resolvidos, há um ambiente propício para o crescimento e o aumento da competitividade, regionalmente. Há necessidade de ações conjuntas entre elos para trabalharem os pontos fracos e as ameaças que a cultura enfrenta, bem como coordenação mais eficiente que iniba a clandestinidade, o comportamento oportunista, e a quebra de contratos, entre outros gargalos que barram e/ou dificultam o crescimento do Sistema.
Algebraic and F-Independent sets in 2-firs
Creators: name: Leroy, A.
name: Ozturk, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16S36; 16K40

description: Let $R$ denote a 2-fir. The notions of F-independence and algebraic subsets of R are defined. The decomposition of an algebraic subset into similarity classes gives a simple way of translating the F-independence in terms of dimension of some vector spaces. In particular to each element $a \in R$ is attached a certain algebraic set of atoms and the above decomposition gives a lower bound of the length of the atomic decompositions of $a$ in terms of dimensions of certain vector spaces. A notion of rank is introduced and fully reducible elements are studied in details.
DINÂMICA EM REDES APLICADA À PESQUISA DO CAFÉ NO BRASIL
Creators: name: Araujo, Uajara Pessoa
name: Antonialli, Luiz Marcelo
name: Guerrini, Fabio Muller
name: Araujo, Uajara Pessoa
name: Antonialli, Luiz Marcelo
name: Guerrini, Fabio Muller
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agribusiness
subject: Redes
subject: redes de pesquisa
subject: pesquisa do café
subject: análise de redes sociais.

description: A dinâmica de uma rede especifica de pesquisa sobre café no Brasil pode ser descrita mediante o emprego da análise sociométrica e de recortes da teoria de redes e do institucionalismo. Optou-se, neste trabalho, pela pesquisa do café, devido a uma característica que lhe peculiar : a ingerência de um Consórcio de alcance nacional, instrumento de intervenção inédito e até então único no cenário da pesquisa científica no país. Além de revelar as estratégias distintas de inserção das entidades centrais da rede – o que era seu objetivo primário – as evidências colhidas serviram para o exame de algumas hipóteses que frequentemente são tomadas como válidas, sem maiores questionamentos. Uma parte delas foi confirmada; outra, por exemplo, a relação entre densidade e coesão de Coleman, não passou incólume ao teste propiciado pela rede em consideração, o que deveria estimular o desenvolvimento de outras construções teóricas mesmo que circunscrita ao caso em estudo. Em paralelo, foi desenvolvido o indicador “Grau de Exogenia” que se mostrou útil à análise de rede de pesquisa; bem como foi possível oferecer uma descrição estrutural da rede em consideração.
GRO J1750-27, a super-critical X-ray neutron star that does not blink an eye
Creators: name: Malacaria, Christian
name: Ducci, Lorenzo
name: Falanga, Maurizio
name: Altamirano, Diego
name: Bozzo, Enrico
name: Guillot, Sebastien
name: Jaisawal, Gaurava
name: Kretschmar, Peter
name: Ng, Mason
name: Pradhan, Pragati
name: Rothschild, Richard
name: Sanna, Andrea
name: Thalammer, Philipp
name: Wilms, Joern
Publisher: name: Zenodo
Year: 2022
Subjects: x-ray
neutron stars
accreting x-ray pulsars
NUSTAR
NICER
cyclotron line
pulse profiles

description: When accreting X-ray pulsars (XRPs) undergo bright X-ray outbursts, their luminosity-dependent spectral and timing features can be analyzed in detail. The XRP GRO J1750-27 recently underwent one of such episodes, during which it was observed with NuSTAR and monitored with NICER. Such a data set is rarely available, as it samples the outburst over more than a month at a luminosity that is always exceeding ~5x1037 erg/s. This value is larger than the typical critical luminosity value, where a radiative shock is formed above the neutron star's surface.
 Our data analysis of the joint spectra confirms the discovery of a deep cyclotron line at a centroid energy of about 44 keV, corresponding to a magnetic field strength of 4.7x1012 G. This value is independently supported by the best-fit physical model for spectral formation in accreting XRPs, which also favors a distance of 14 kpc, in agreement with recent findings. Contrary to theoretical expectations and observational evidence from other similar sources, the pulse profiles as observed by NICER through the outburst raise, peak and decay remain remarkably steady. The NICER spectrum, including the iron K\($\alpha$\) line best-fit parameters, also remain almost unchanged at all probed outburst stages, similar to the pulsed fraction behavior. We argue that all these phenomena are linked and interpret them as resulting from a saturation effect of the accretion column's emission, which occurs in the high-luminosity regime.
Additional file 1 of Understanding family caregivers’ needs to support relatives with advanced progressive disease at home: an ethnographic study in rural Portugal
Creators: name: Teixeira, Maria João Cardoso
name: Abreu, Wilson
name: Nilza Costa
name: Maddocks, Matthew
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy

description: Additional file 1: Table S1. Report in accordance with the COREQ guidelines – checklist for reporting qualitative research.
Real scalar field, non-relativistic limit, and cosmological expansion
Creators: name: Heyen, Lars Helge
name: Floerchinger, Stefan
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The existing transformation from a relativistic real scalar field to a complex non-relativistic scalar field by Namjoo, Guth, and Kaiser is generalized from Minkowski space to a more general background metric. In that case the transformation is not purely algebraic any more but determined by a differential equation. We apply the generalized transformation to a real scalar with $ϕ^4$ interaction on an Friedmann-Lemaître-Robertson-Walker cosmologically expanding background and calculate the resulting non-relativistic action up to second order in small parameters. We also show that the transformation can be interpreted as a Bogoliubov transformation between relativistic and non-relativistic creation and annihilation operators and comment on emerging symmetries in the non-relativistic theory.
REMUNERAÇÃO E CARACTERÍSTICAS DAS PESSOAS OCUPADAS NA AGRO-INDÚSTRIA CANAVIEIRA NO BRASIL, DE 2002 a 2006
Creators: name: Hoffmann, Rodolfo
name: Oliveira, Fabiola Cristina Ribeiro De
name: Hoffmann, Rodolfo
name: Oliveira, Fabiola Cristina Ribeiro De
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agribusiness
subject: Crop Production/Industries
subject: Cana-de-açúcar
subject: Empregados
subject: Agro-indústria canavieira
subject: Brasil
subject: Sugar cane
subject: Earnings
subject: Sugar industry
subject: Brazil

description: ste artigo analisa a remuneração, a qualificação e características do emprego das pessoas ocupadas em empreendimentos cuja atividade principal é a cultura da cana-de-açúcar, a produção de açúcar e/ou a produção de álcool, no período de 2002 a 2006. Considera-se o conjunto de todas as pessoas ocupadas nessas atividades e destaca-se aqueles que são empregados (assalariados). Compara-se o nível de rendimento das pessoas empregadas em diversas lavouras: cana-de-açúcar, arroz, soja, café, mandioca, milho etc. são apresentados resultados para o Brasil como um todo, para as regiões norte-nordeste e centro-sul e para o estado de São Paulo. Verifica-se que a remuneração dos empregados na cultura da cana cresceu no período analisado, acompanhando o crescimento do salário mínimo real. Comparando a remuneração e as características dos empregados na cana e em outras lavouras, verifica-se que a segunda remuneração mais elevada é a dos empregados na cana-de-açúcar.---------------------------The paper analysis the earnings and other characteristics of employment in sugar cane crops and in sugar and alcohol industries in Brazil, from 2002 to 2006, considering either all occupied persons or only employees. The paper also compares earnings of workers in different crops: sugar cane, rice, soybean, coffee, corn and others. Results are shown considering the whole country, the North-Northeast and Center-South regions and the State of São Paulo. It is shown that average earnings of sugar cane workers increased during the period, following the increasing value of the national real minimum wage. Comparing the characteristics of the employment in different crops, it can be verified that the second highest earnings level is in sugar cane.
Staggered Fermion, its Symmetry and Ichimatsu-Patterned Lattice
Creators: name: Itoh, K.
name: Kato, M.
name: Murata, M.
name: Sawanaka, H.
name: So, H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We investigate exact symmetries of a staggered fermion in D dimensions. The Dirac operator is reformulated by SO(2D) Clifford algebra. The chiral symmetry, rotational invariance and parity symmetries are clarified in any dimension. Local scalar and pseudo-scalar modes are definitely determined, in which we find non-standard modes. The relation to Ichimatsu-patterned lattice approach is discussed.
description: 3 pages, 1 figure, "Talk at Lattice2004(theory), Fermilab, June 21-26, 2004"
Additional file 1 of Counting on birth registration: mixed-methods research in two EN-BIRTH study hospitals in Tanzania
Creators: name: Reed, Sarah
name: Shabani, Josephine
name: Boggs, Dorothy
name: Nahya Salim
name: Sillanoga Ng’unga
name: Day, Louise T.
name: Peven, Kimberly
name: Kong, Stefanie
name: Ruysen, Harriet
name: Jackson, Debra
name: Shamba, Donat
name: Lawn, Joy E.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1. EN-BIRTH study sites – National mortality rates and hospital context.
A contribuição de P&D Agropecuário para Convergência e Crescimento da Renda Agropecuária no Brasil
Creators: name: Barreto, Ricardo Candéa Sá
name: Almeida, Eduardo Simões De
name: Barreto, Ricardo Candéa Sá
name: Almeida, Eduardo Simões De
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural Finance
subject: Research and Development/Tech Change/Emerging Technologies
subject: convergência de renda agropecuária
subject: nova geografia econômica
subject: modelo de efeitos fixos com dependência espacial
subject: income convergence
subject: new economic geography
subject: fixed effect model with spatial dependence

description: Este artigo estuda o crescimento econômico e a convergência de renda Agropecuária dos estados Brasileiros de 1986 a 2004. Para este fim, utiliza-se um modelo econométrico de efeitos fixos, controlando-se a dependência espacial. Além de comprovar convergência condicional, o modelo econométrico revelou que o crescimento do PIB per capita agropecuário foi afetado por variáveis como capital físico agropecuário, infra-estrutura telefônica, infra-estrutura de armazenagem, crédito rural, número de trabalhadores rurais, e por externalidades espaciais. Além disso, ficou evidenciada a importância de P & D agropecuário para o crescimento e convergência de renda per capita no setor agropecuário e ainda a geração de externalidades espaciais positivas.--------------------------This article examines the economic growth and the convergence of income farming Brazilian states from 1986 to 2004. For this purpose, use is an econometric model of fixed effects, managing to spatial dependence. Besides prove conditional convergence, the econometric model showed that the growth in GDP per capita farming was affected by variables such as farming physical capital, infrastructure telephone, storage infrastructure, rural credit, number of rural workers, and by externalities spatial. Furthermore, it was demonstrated the importance of R & D, for growth and convergence of per capita income in the agricultural sector and the generation of positive externalities spatial.
THE HIDDEN HISTORY BEHIND COMMON GRAMMAR RULES: WHY DO WE SAY "AN HOUR" BUT NOT "A UNIVERSITY"?
Creators: name: Jalg'asbaeva, Tumaris
Publisher: name: Zenodo
Year: 2025

description: The distinction between the indefinite articles "a" and "an" in English grammar is a fundamental yet often misunderstood rule. While seemingly straightforward, this grammatical feature is deeply rooted in the historical evolution of the English language and guided by phonological principles rather than spelling conventions. This paper examines the historical origins of article usage, the phonetic rationale behind the distinction, and its implications for linguistic efficiency, cognitive processing, and second-language acquisition. Furthermore, it explores cross-linguistic variations and the influence of borrowed words on article selection. By analyzing linguistic studies and phonological adaptation theories, this study highlights the dynamic nature of language and its role in optimizing speech clarity and ease of articulation.
Additional file 1 of From research to clinical practice: a systematic review of the implementation of psychological interventions for chronic headache in adults
Creators: name: Perlini, Cinzia
name: Donisi, Valeria
name: Piccolo, Lidia Del
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: Additional file 1. Survey.
Additional file 1 of A method for estimating neighborhood characterization in studies of the association with availability of sit-down restaurants and supermarkets
Creators: name: Peng, Ke
name: Rodriguez, Daniel A.
name: Hirsch, Jana A.
name: Gordon-Larsen, Penny
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 1. SIC codes used to identify food outlets.
Additional file 2 of From research to clinical practice: a systematic review of the implementation of psychological interventions for chronic headache in adults
Creators: name: Perlini, Cinzia
name: Donisi, Valeria
name: Piccolo, Lidia Del
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: Additional file 2: Supplementary Table. Other variables extracted from the 28 selected studies (in chronological order).
The Power of Axisymmetric Pulsar
Creators: name: Gruzinov, Andrei
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Stationary force-free magnetosphere of an axisymmetric pulsar is shown to have a separatrix inclination angle of 77.3$^\circ$. The electromagnetic field has an $R^{-1/2}$ singularity inside the separatrix near the light cylinder. A numerical simulation of the magnetosphere which crudely reproduces these properties is presented. The numerical results are used to estimate the power of an axisymmetric pulsar: $L=(1\pm 0.1)μ^2Ω^4/c^3$. A need for a better numerical simulation is pointed out.
description: 9 pages
Exact $p$-adic computation in Magma
Creators: name: Doris, Christopher
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: Symbolic Computation (cs.SC)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We describe a new arithmetic system for the Magma computer algebra system for working with $p$-adic numbers exactly, in the sense that numbers are represented lazily to infinite $p$-adic precision. This is the first highly featured such implementation. This has the benefits of increasing user-friendliness and speeding up some computations, as well as forcibly producing provable results. We give theoretical and practical justification for its design and describe some use cases. The intention is that this article will be of benefit to anyone wanting to implement similar functionality in other languages.
description: 22 pages, 2 figures. arXiv admin note: text overlap with arXiv:1805.09794
ANÁLISE DE RENTABILIDADE FINANCEIRA DE UMA MINIFÁBRICA DE BENEFICIAMENTO CASTANHA DE CAJU NO ESTADO DO CEARÁ
Creators: name: Santos, Antonio Celio
name: Mendonca, Kamila Vieira
name: Campos, Roberio Telmo
name: Santos, Antonio Celio
name: Mendonca, Kamila Vieira
name: Campos, Roberio Telmo
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agribusiness
subject: Crop Production/Industries
subject: Rentabilidade
subject: minifábrica
subject: castanha de caju
subject: Ceará
subject: Economic return
subject: minifactory
subject: cashew nut

description: Objetiva-se analisar a viabilidade de instalação de um tamanho específico de minifábrica de processamento da castanha de caju sob os pontos de vista de mercado, técnico e de rentabilidade econômica. Os dados foram obtidos mediante consulta direta à EMBRAPA, acrescidos de pesquisa bibliográfica sobre a situação da cajucultura no Brasil e Ceará. Faz-se uso da técnica básica da análise de custos e benefícios sob o ponto de vista privado ou financeiro. Conclui-se que o referido tamanho de unidade de processamento é plenamente viável, segundo análise dos indicadores relação Benefício/Custo, Valor Presente Líquido e Taxa Interna de Retorno. Para o Brasil, o mercado é bastante promissor com potencial para ampliar o mercado externo de amêndoas de castanhas de caju.----------------This study aims to analyze the installation viability of a specific size of cashew nut processing minifactory under the market, technical and economic return stand points. The data were obtained through out direct application of questionnaires to the EMBRAPA, in addition to the bibliography review about the cashew plantation in Brazil and Ceará. It was used the basic tools of benefit cost analysis under the private and financing perspectives. We concluded that the specified size of processing unit is fully viable, given the indicators of benefit-cost ratio, net present value and internal tax of return. In Brazil, the market of cashew nuts is quite promising considering that there is prospect of extending it to the external market.
Towards a holistic assessment of intertidal ecosystem health
Creators: name: Ogden, Donna Lesley
Publisher: name: University of British Columbia
Year: 2009

description: A diagnostic tool of intertidal ecosystem health was created and tested at a study area in southern Vancouver Island, British Columbia, Canada. The diagnostic tool was created to promote a more holistic approach to intertidal ecosystem health assessment, in addition to being simple, fast, inexpensive, and accessible. The diagnostic tool was generated after 6 coastal zone managers were interviewed and data were gathered on current practices and challenges in ecosystem health assessment. Based on a conceptual model of intertidal health drawing on the metaphor of the ecosystem as a household, the diagnostic tool was designed with respondents' comments in mind. The tool is composed of a series of questions that ask the practitioner to consider and judge the essential components of, and their interactions within, an intertidal ecosystem to assess the overall health of a specific site. To test the diagnostic tool, species and abundance data were collected from the intertidal zone in the Cordova Bay area, during the summer of 2004. The survey methodology followed the Shorekeepers' protocol for monitoring intertidal habitat in Canada's Pacific Waters (Jamieson et al., 1999). The study area has known impacts primarily from non-point sources of pollution and secondarily, from recreational use. Three sites within the Cordova Bay study area were chosen to reflect the differing severity of impacts. A high impact site, located directly at the mouth of Douglas Creek, carries a large amount of pollutants from urban run-off. A low impact site was chosen several hundred metres away from the mouth of the creek, with a moderately impacted site in between the sites with high and low levels of impact. The field data were used to test and evaluate the diagnostic tool based on its ability to meet the above criteria (holistic approach, simple, fast, inexpensive, accessible). The results indicate that the diagnostic tool is an appropriate first step in working towards an holistic assessment of intertidal ecosystem health. Implications of this research for integrated coastal zone management and future research are discussed in the final chapter of this paper.
title: Analysis of recurrent event processes with dynamic models
Creators: name: Nirmalkanna, Kunasekaran
Publisher: name: Memorial University of Newfoundland
Year: 2021

description: The analysis of past developments of processes through dynamic covariates is useful to understand the present and future of processes generating recurrent events. In this study, we consider two essential features of recurrent event processes through dynamic models. These features are related to monotonic trends and clustering of recurrent events, and frequently seen in medical studies. We discuss the estimation of these features through dynamic models for event counts. We also focus on the settings in which unexplained excess heterogeneity is present in the data. Furthermore, we show that the violation of the strong assumption of independent gap times may introduce substantial bias in the estimation of these features with models for event counts. To address these issues, we apply a copula-based estimation method for the gap time models. Our approach does not rely on the strong independent gap time assumption, and provides a valid estimation of model parameters. We illustrate the methods developed in this study with data on repeated asthma attacks in children. Finally, we propose some goodness-of-fit procedures as future research.