cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Associated Higgs production with bottom quarks at hadron colliders
Creators: name: Krämer, Michael
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Higgs-boson production in association with bottom quarks is an important discovery channel for supersymmetric Higgs particles at the Tevatron and the LHC. We present higher-order QCD predictions for inclusive cross sections and for the production of a Higgs boson in association with high-p_T bottom quarks. We compare calculations performed in a four-flavour scheme based on the parton processes gg,qqbar -> b bbar H with five-flavour scheme calculations based on bottom-quark scattering.
description: 5 pages, 6 figures, Contribution to the Proceedings of "Loops and Legs in Quantum Field Theory", Zinnowitz, Germany, April 2004
O PROGRAMA EMPRESÁRIO RURAL À LUZ DA NOVA PNATER
Creators: name: Geraldini Junior, Elcio Antonio
name: Peres, Carolina Violante
name: Bisetto, Silvana Cristina Bianco
name: Oliveira, Julieta Teresa Aier De
name: Bergamasco, Sonia Maria Pessoa Pereia
name: Geraldini Junior, Elcio Antonio
name: Peres, Carolina Violante
name: Bisetto, Silvana Cristina Bianco
name: Oliveira, Julieta Teresa Aier De
name: Bergamasco, Sonia Maria Pessoa Pereia
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: extensão rural
subject: empreendedorismo rural
subject: agricultura família
subject: rural extension
subject: rural enterprising
subject: familiar agriculture

description: O objetivo deste trabalho foi fazer uma análise comparada entre o “Programa Empresário Rural” – Proer - desenvolvido pelo Senar (Serviço Nacional de Aprendizagem Rural) para pequenos produtores e trabalhadores rurais, e a nova Pnater (Política Nacional de Assistência Técnica e Extensão Rural) do Ministério do Desenvolvimento Agrário (MDA). Os dados analisados foram obtidos em fontes secundárias junto às instituições responsáveis pelo Programa e pela Política. Lançou-se mão do método dedutivo para análise comparativa, destacando-se os principais pontos de divergência entre os documentos em relação à questão da gestão de unidades de produção familiar. Estes pontos se constituem como recomendações para o aprimoramento de programas que privilegiem as especificidades e a importância da agricultura familiar no desenvolvimento sustentável do país.---------------------------------------------The purpose of this paper was do the analysis between the “Program Rural Owner” – Proer – developed by Senar (Serviço Nacional de Aprendizagem Rural) for small rural producers and rural works, and the new Pnater( Política Nacional de Assistencia Técnica e Extension Rural) in the Ministerial of Agrarian Development(MDA). This files was got in the secondary sources through the responsible institutions for the Programs and the Polices. It was used deduction methods for the comparative analysis, detaching the principal points of divergences between the documents regarding the question of administrations of the production familiar agriculture. This points consists as recommendation to the improve programs that privileging the specifications and the important of the familiar agriculture on the development rural sustainable of the country.
Elucidating northern Sardinia’s fortified heritage through traditional masonry and historical materials
Creators: name: Pirisino, Maria Serena
Publisher: name: Restauro Archeologico
Year: 2021

description: In medieval Sardinia an important system of around a hundred fortifications was built for varying defensive purposes. This paper, part of an ongoing research focused on the study of this system, takes an interdisciplinary approach to the investigation of traditional masonry techniques and historical materials used between the 12th and 15th centuries in Northern Sardinia. In particular, 3 of 40 defensive structures distributed on this territory, have been selected as representative of a specific historical and cultural context: the Castles of Pedres and Della Fava, and Re Baldo Palace. Archaeological and material surveys were conducted in order to elucidate the formal, spatial, dimensional, technological, and constructional values of these sites as well as to reconstruct the architectural evolution that marked the history, not only of these fortifications, but also that of the surrounding territory, with the aim to recognise this heritage, which was ignored for a long time, as heritage to be safeguarded and enhanced.
description: Restauro Archeologico, Vol. 29 No. 1 (2021)
Jet energy drop
Creators: name: Cal, Pedro
name: Lee, Kyle
name: Ringer, Felix
name: Waalewijn, Wouter J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the jet energy drop, which is the relative difference between the groomed and ungroomed jet energy or transverse momentum. It is one of the fundamental quantities that characterizes the impact of grooming on jets produced in high energy collisions. We consider three different grooming algorithms i) soft drop, ii) iterated soft drop, and iii) trimming. We carry out the resummation of large logarithms of the jet energy drop, the jet radius as well as relevant grooming parameters at next-to-leading logarithmic (NLL$'$) accuracy. In addition, we account for non-global and clustering logarithms, and determine the next-to-leading order corrections. For soft drop we perform a joint resummation of the jet energy drop and the groomed jet radius, which is necessary to achieve the correct all-order structure of the cross section, in particular for the Sudakov-safe case of soft drop with $β=0$. We present numerical results for LHC energies and compare to Pythia simulations as well as CMS data. Our factorization framework predicts the onset of nonperturbative effects in the jet energy distribution, in line with what we find in Pythia. The jet energy drop observables stand out because they only probe soft radiation, making them ideal candidates for the tuning of parton shower Monte Carlo event generators and for probing medium effects in heavy-ion collisions.
description: 49 pages, 25 figures, published version
Scheduling for aggregated multiple asymmetrical links
Creators: name: Putih, Rony Patrice
Publisher: name: University of British Columbia
Year: 2009

description: Increase in demand for bandwidth has propelled the need for connecting two communication nodes with more than one physical link. Scheduling among these links must maintain Quality of Service (QoS) usually attained in the case of a single link connection. Previous single-server scheduling disciplines do not take into account properties inherent to multiple-server systems such as: packet re-ordering due to competition among packets of the same flow, and the ability to schedule more than one flow simultaneously due to division of total bandwidth among multiple servers / links. A multi-server system scheduling discipline, called the MSF2Q (Multiple Server Fair Queueing with bounded Fairness)[l], exploited the bandwidth division property using scheduling eligibility constraints to achieve better throughput fairness. However, MSF2Q assumes equal division of total bandwidth. In this thesis, we extend MSF Q to provide better fairness in throughput for multiple-server systems where each server is of a different (asymmetrical) rate. This new discipline, called MASF Q (Multiple Asymmetrical Server Fair Queueing with bounded Fairness), achieves the same theoretical delay bound and per-flow service discrepancy as MSF2Q. Simulation results are provided for performance comparison.
Simplicity of eigenvalues in the Anderson model
Creators: name: Klein, Abel
name: Molchanov, Stanislav
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 82B44

description: We give a simple, transparent, and intuitive proof that all eigenvalues of the Anderson model in the region of localization are simple.
Paesaggi archeologici nei contesti urbani. Il caso dell’Anfiteatro romano di Catania (Italia)
Creators: name: Sanfilippo, Giulia
name: Mondello, Attilio
name: Ferlito, Laura
Publisher: name: Restauro Archeologico
Year: 2021

description: Archaeological sites in urban centres represent tangible historical evidence, but they can also be a real cut in the heart of cities. They are often undervalued, and their survival is threatened by the stratifications with which they should coexist for a mutual valorisation. An emblematic case is the Catania Roman amphitheatre, one of the most representative Sicilian examples of hypogeal monumental archaeology. Its remains are located below the urban fabric of the 18th and 19th cent., in a precarious state of preservation and unsolved integration with the city. The paper presents the results of a cognitive process useful to provide the basis for a conservation and restoration plan. After a specific archival survey about all the scientific studies carried out so far, the research has made photogrammetric and constructive surveys to identify the main causes of decay and to propose a design solution.
description: Restauro Archeologico, Vol. 29 No. 1 (2021)
Protostars and Outflows in the NGC7538 - IRS9 Cloud Core
Creators: name: Sandell, G.
name: Goss, W. M.
name: Wright, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: New high resolution observations of HCO+ J=1-0, H13CN J=1-0, SO 2,2 - 1,1, and continuum with BIMA at 3.4 mm show that the NGC7538 - IRS9 cloud core is a site of active ongoing star formation. Our observations reveal at least three young bipolar molecular outflows, all ~ 10,000 -- 20,000 years old. IRS9 drives a bipolar, extreme high velocity outflow observed nearly pole on. South of IRS9 we find a cold, protostellar condensation with a size of ~ 14" x 6" with a mass > 250 Msun. This is the center of one of the outflows and shows deep, red-shifted self absorption in HCO+, suggesting that there is a protostar embedded in the core, still in a phase of active accretion. This source is not detected in the far infrared, suggesting that the luminosity < 10^4 Lsun; yet the mass of the outflow is ~ 60 Msun. The red-shifted HCO+ self-absorption profiles observed toward the southern protostar and IRS9 predict accretion rates of a few times 10^-4 to 10^-3 Msun/yr. Deep VLA continuum observations at 3.6 cm show that IRS9 coincides with a faint thermal VLA source, but no other young star in the IRS9 region has any detectable free-free emission at a level of ~ 60 microJy at 3.6 cm. The HCO+ abundance is significantly enhanced in the hot IRS9 outflow. A direct comparison of mass estimates from HCO+ and CO for the well-characterized red-shifted IRS9 outflow predicts an HCO+ enhancement of more than a factor of 30, or [HCO+/H2] >= 6 10^-8.
description: 40 pages, 3 tables and 10 figures included; to appear in ApJ
A pedagogia da alternância na construção do desenvolvimento rural do Vale do Jequitinhonha, Minas Gerais.
Creators: name: Teodoro, Ricardo Borges
name: Oliveira, Cyntia Meireles De
name: Silva, Daniel Ferreira Da
name: Teodoro, Ricardo Borges
name: Oliveira, Cyntia Meireles De
name: Silva, Daniel Ferreira Da
Publisher: name: Unknown
Year: 2008
Subjects: subject: Farm Management
subject: Município de Turmalina
subject: Escola Família Agrícola
subject: Agricultura Familiar
subject: municipal of Turmalina
subject: School Agricultural Family
subject: Family agriculture

description: O presente trabalho foi realizado no Vale do Jequitinhonha, município de Turmalina, Minas Gerais, analisando a interação entre a Escola Família Agroindustrial de Turmalina – EFAT, produtores associados e instituições parceiras. Para o levantamento dos dados foram realizadas visitas in loco e reuniões, trabalhando-se com questionários e entrevistas semi-estruturadas junto aos agricultores familiares do município, monitores e instituições parceiras. O objetivo foi observar como a EFAT tem atuado nas comunidades locais por meio dos instrumentos pedagógicos da alternância e como esta têm contribuído para o desenvolvimento local e regional. Constatou-se que a prática da pedagogia da alternância propicia a melhor organização dos produtores com vistas ao enfrentamento das dificuldades encontradas, capacitando e profissionalizando o jovem e os agricultores, proporcionando assim melhorias na qualidade de vida e renda das famílias, o que, por conseguinte, reflete diretamente na diminuição do êxodo rural. Palavras-chaves : Município de Turmalina; Escola Família Agrícola; Agricultura Familiar .----------------------------------------------------------------The present work was accomplished in Valley of Jequitinhonha, municipal district of Turmalina, Minas Gerais, analiyzing the interaction among the School Family Agroindustrial of Turmalina – EFAT, associated producers and institutions partners. For the rising of the data visits in loco and meetings were accomplished, being worked with questionnaires and interviews semi-structured the family farmers of the municipal, monitors and institutions partners. The objective was to observe like EFAT has been acting in the local communities through the pedagogic instruments of the alternation and as these have been contributing to the local and regional development. It was verified that the practice of the pedagogy of the alternation propitiates the best organization of the producing with views to the qualifying and professionalizing the youth and the farmers, providing like this improvements in the quality of life and income of the families, which, consequently, contemplates directly in the decrease of the rural exodus.
Geometric presentations for Thompson's groups
Creators: name: Dehornoy, Patrick
Publisher: name: arXiv
Year: 2004
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: MSC: 20F05, 20F36, 20B07

description: We prove that Thompson's groups $F$ and $V$ are the geometry groups of associativity, and of associativity together with commutativity, respectively. We deduce new presentations of $F$ and $V$. These presentations lead to considering a certain subgroup of $V$ and an extension of this subgroup. We prove that the latter are the geometry groups of associativity together with the law $x(yz) = y(xz)$, and of associativity together with a twisted version of this law involving self-distributivity, respectively.
From stone heaps to heritage landmarks. The excavation, restoration and reconstruction of prehistoric tombs at Salūt (central Oman) between experimental archaeology and site valorisation
Creators: name: Degli Esposti, Michele
name: Bizzarri, Stefano
Publisher: name: Restauro Archeologico
Year: 2021

description: The archaeological investigation by the former Italian Mission to Oman (University of Pisa) in the ancient oasis of Salūt, in central Oman, targeted several prehistoric burials located within the perimeter of the Archaeological Park of Bysiah and Salūt, a fundamental cultural pole developed under the auspices of the Ministry for Heritage and Tourism of the Sultanate of Oman. After stratigraphic excavation and documentation of the surviving structures, the tombs were restored and in some cases reconstructed to make them fully understandable to the wider public visiting the Park. This work provided useful information about the costs in human labour and raw materials procurement entailed in their construction, revealing itself as an experimental archaeology process capable of further highlighting the importance that these monuments had for the ancient community at the same time as fostering the bonds between the locals and their archaeological heritage.
description: Restauro Archeologico, Vol. 29 No. 1 (2021)
The GALAH Survey: Non-LTE departure coefficients for large spectroscopic surveys
Creators: name: Amarsi, A. M.
name: Lind, K.
name: Osorio, Y.
name: Nordlander, T.
name: Bergemann, M.
name: Reggiani, H.
name: Wang, E. X.
name: Buder, S.
name: Asplund, M.
name: Barklem, P. S.
name: Wehrhahn, A.
name: Skúladóttir, Á.
name: Kobayashi, C.
name: Karakas, A. I.
name: Gao, X. D.
name: Bland-Hawthorn, J.
name: De Silva, G. M.
name: Kos, J.
name: Lewis, G. F.
name: Martell, S. L.
name: Sharma, S.
name: Simpson, J. D.
name: Zucker, D. B.
name: Čotar, K.
name: Horner, J.
name: collaboration, the GALAH
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Massive sets of stellar spectroscopic observations are rapidly becoming available and these can be used to determine the chemical composition and evolution of the Galaxy with unprecedented precision. One of the major challenges in this endeavour involves constructing realistic models of stellar spectra with which to reliably determine stellar abundances. At present, large stellar surveys commonly use simplified models that assume that the stellar atmospheres are approximately in local thermodynamic equilibrium (LTE). To test and ultimately relax this assumption, we have performed non-LTE calculations for $13$ different elements (H, Li, C, N, O, Na, Mg, Al, Si, K, Ca, Mn, and Ba), using recent model atoms that have physically-motivated descriptions for the inelastic collisions with neutral hydrogen, across a grid of $3756$ 1D MARCS model atmospheres that spans $3000\leq T_{\mathrm{eff}}/\mathrm{K}\leq8000$, $-0.5\leq\log{g/\mathrm{cm\,s^{-2}}}\leq5.5$, and $-5\leq\mathrm{[Fe/H]}\leq1$. We present the grids of departure coefficients that have been implemented into the GALAH DR3 analysis pipeline in order to complement the extant non-LTE grid for iron. We also present a detailed line-by-line re-analysis of $50126$ stars from GALAH DR3. We found that relaxing LTE can change the abundances by between $-0.7\,\mathrm{dex}$ and $+0.2\,\mathrm{dex}$ for different lines and stars. Taking departures from LTE into account can reduce the dispersion in the $\mathrm{[A/Fe]}$ versus $\mathrm{[Fe/H]}$ plane by up to $0.1\,\mathrm{dex}$, and it can remove spurious differences between the dwarfs and giants by up to $0.2\,\mathrm{dex}$. The resulting abundance slopes can thus be qualitatively different in non-LTE, possibly with important implications for the chemical evolution of our Galaxy.
description: 19 pages, 25 figures, 2 tables, arXiv abstract abridged; accepted for publication in A&A
The group of parenthesized braids
Creators: name: Dehornoy, Patrick
Publisher: name: arXiv
Year: 2004
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: MSC 20F36, 20N02, 57M25, 57S05

description: We investigate a group $B\_\bullet$ that includes Artin's braid group $B\_\infty$ and Thompson's group $F$. The elements of $B\_\bullet$ are represented by braids diagrams in which the distances between the strands are not uniform and, besides the usual crossing generators, new rescaling operators shrink or strech the distances between the strands. We prove that $B\_\bullet$ is a group of fractions, that it is orderable, admits a non-trivial self-distributive structure, i.e., one involving the law $x(yz)=(xy)(xz)$, embeds in the mapping class group of a sphere with a Cantor set of punctures, and that Artin's representation of $B\_\infty$ into the automorphisms of a free group extends to $B\_\bullet$.
ESTIMATIVA DA CURVA DE KUZNETS AMBIENTAL PARA A AMAZÔNIA LEGAL.
Creators: name: Santos, Ricardo Bruno Nascimento Dos
name: Diniz, Marcelo Bentes
name: Diniz, Marcia Juca Teixeira
name: Rivero, Sergio Luiz De Medeiros
name: Oliveira Junior, Jose Nilo De
name: Santos, Ricardo Bruno Nascimento Dos
name: Diniz, Marcelo Bentes
name: Diniz, Marcia Juca Teixeira
name: Rivero, Sergio Luiz De Medeiros
name: Oliveira Junior, Jose Nilo De
Publisher: name: Unknown
Year: 2008
Subjects: subject: Environmental Economics and Policy
subject: International Development
subject: Meio Ambiente
subject: Hipótese de Kuznets
subject: Amazônia
subject: Crescimento Econômico
subject: Environment
subject: Kuznets Hypothesis
subject: Amazon
subject: Economic Growth

description: O presente trabalho investigou a hipótese da Curva Ambiental de Kuznets – CAK, diante da controvérsia que existe na atual literatura entre o crescimento econômico e impactos ambientais. A principal contribuição do artigo é apresentar um estudo de caso voltado para uma das regiões mais importantes no debate ambiental que é a Amazônia Legal. A questão em si, que não está determinada teoricamente, e apresenta diversos resultados empíricos contraditórios, incorpora a idéia de verificar se o crescimento econômico gera algum tipo de proteção automática ao meio ambiente, e até ao desenvolvimento sustentável. Com isso, o presente trabalho procura contribuir para esse debate, trazendo evidências empíricas inéditas a âmbito regional. Utilizando como variável dependente a área desmatada em hectares e como variável dependente o PIB per capita dos 792 municípios da Amazônia Legal, foi testada empiricamente qual a relação existente nessa região entre crescimento econômico e impacto ambiental. Há evidencias para curvas ambientais com formato quadrático, aceitando-se assim as CAK originais, porém com modelos pouco representativos.---------------------------------------------This study investigated the hypothesis of the Environmental Kuznets Curve - EKC, given the controversy that exists in the current literature between economic growth and environmental impacts. This work delayed to approach an analysis on the environmental aspect, and especially, for case study as one of the most important region in the environmental debate that is the Legal Amazon. The question itself, which is not theoretically determined, and presents several contradictory empirical results, and see if economic growth generates some kind of automatic protection to the environment and to sustainable development. Thus, the present work seeks to contribute for this debate, bringing empirical evidence unpublished a regional scope. Using as a dependent variable deforested area in hectares and as a dependent variable per capita GDP of 792 municipalities in the Legal Amazon, has been tested empirically what the relationship existing in the region between economic growth and environmental impact. There are evidences to environmental curves with quadratic form, accepting thereby the CAK originals, but with little models representative.
Internal Kinematics of Luminous Compact Blue Galaxies
Creators: name: Bershady, Matthew A.
name: Vils, M.
name: Hoyos, C.
name: Guzman, R.
name: Koo, D. C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We describe the dynamical properties which may be inferred from HST/STIS spectroscopic observations of luminous compact blue galaxies (LCBGs) between 0.1
description: To appear in "Starbursts: from 30 Doradus to Lyman Break Galaxies" 2005, eds. R. de Grijs and R. M. Gonzalez Delgado (Kluwer)
Prima di Atene. Cooperazione intellettuale e illusione elitaria, atmosfera de La Conférence d’Athènes sur la conservation des monuments del 1931
Creators: name: Caccia, Susanna
Publisher: name: Restauro Archeologico
Year: 2021

description: The essay aims to retrace the events leading up to the organisation of the 1931 Athens Conference, the first international conference on the conservation and restoration of monuments. Organised in Paris by the Office International des Musées under the aegis of the Société des Nations, the initiative brought together over one hundred participants including archaeologists, architects, conservators and art historians to discuss heritage issues. The Conference emblematised a key moment between the two wars, bringing out new approaches and new problems within a discussion that had been going on for many decades, including through, and it is first in this sense too, a comparison between the legislations of different countries. The political and cultural climate linked to this initiative today represents a fundamental stage in understanding the birth of the international debate on heritage conservation issues.
description: Restauro Archeologico, Vol. 29 No. 1 (2021)
DINÂMICA DA CADEIA AGROINDUSTRIAL DO CAFÉ (COFFEA ARABICA L.) BRASILEIRO APÓS A DESREGULAMENTAÇÃO
Creators: name: Ponciano, Niraldo Jose
name: Ney, Marlon Gomes
name: Mata, Henrique Tome Da Costa
name: Rocha, Jose Paccelli
name: Ponciano, Niraldo Jose
name: Ney, Marlon Gomes
name: Mata, Henrique Tome Da Costa
name: Rocha, Jose Paccelli
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agribusiness
subject: Crop Production/Industries
subject: Café
subject: cadeia agroindustrial
subject: comercialização
subject: diferenciação do produto
subject: exportação
subject: Coffee
subject: agroindustrial chain
subject: marketing
subject: product differentiation
subject: export

description: Objetivou-se analisar a estrutura e a dinâmica da cadeia agroindustrial do café brasileiro após a desregulamentação e seus ajustamentos para atender as exigências do mercado. Estimou-se estrutura e valores da cadeia por meio dos custos e da produção. Dados e informações foram levantados na internet e em trabalhos precursores. Os resultados mostraram que o café continua sendo um dos produtos mais importantes do agronegócio brasileiro. Com a desregulamentação, houve instabilidade nos preços e os ajustamentos tanto dos preços quanto das imperfeições dos agentes da cadeia ocorreram de forma lenta. Por outro lado, o mercado imprimiu certa dinâmica em toda a cadeia agroindustrial do café. Criaram-se novos nichos de mercado, com ênfase na diferenciação do produto, qualidade, certificação, responsabilidade social, mínimo de agressão ao meio ambiente. Houve migração da produção para regiões com melhores condições edafoclimáticas, Minas Gerais e Espírito Santo. No segmento de comercialização, tem ocorrido mais ênfase na formulação de blends alinhado ao processo de diferenciação do produto para atender as indústrias e importadores.----------------------------------------------The objective was to analyze the structure and dynamics of the chain of agroindustrial Brazilian coffee after deregulation and its adjustments to meet the demands of the market. It was estimated structure and values through the chain costs and production. Data and information were raised on the Internet and in work precursors. The results showed that the coffee remains one of the most important products of the Brazilian agribusiness. With deregulation, there was instability in prices and price adjustments both on the imperfections of the players in the chain were so slow. Moreover, the market printed momentum throughout the chain of coffee farming. Creation of new niche markets, with emphasis on the differentiation of the product, quality and certification, social responsibility, least of aggression to the environment. There was a migration of production to areas with better conditions climate and soil, Minas Gerais and Espirito Santo. In segment of the market, more emphasis has occurred in the formulation of blends aligned to the process of product differentiation to meet the industries and importers.
ERRÂNCIAS SERTANEJAS: AS MIGRAÇÕES CAMPO-CIDADE EM MONTES CLAROS NO NORTE DE MINAS GERAIS.
Creators: name: Narciso, Andrea Maria
name: Brandao, Carlos Rodriques B.
name: Narciso, Andrea Maria
name: Brandao, Carlos Rodriques B.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Community/Rural/Urban Development
subject: Labor and Human Capital
subject: migrações internas
subject: políticas públicas
subject: trabalho
subject: mercado de trabalho
subject: desemprego
subject: Montes Claros
subject: internal migrations
subject: public policies
subject: work market
subject: unemployment
subject: market

description: Este trabalho apresenta reflexões sobre a dinâmica interna rural no Brasil com ênfase para o Norte de Minas Gerais. A reflexão sobre a migração rural na cidade do sertão de Minas Gerais corrobora a hipótese das migrações estarem ocorrendo cada vez mais dentro das próprias regiões, em função do crescimento incentivado pelo Estado em algumas cidades e também a desilusão com as metrópoles, conseqüência do processo de organização do trabalho que produz uma combinação perversa cuja principal causa e conseqüência é o desrespeito aos trabalhadores migrantes. A análise do perfil sócio-econômico do migrante rural e a sua integração no mercado de trabalho, as possibilidades, colocações e o mercado informal como via de sub-integração, revelam que as relações sócio espaciais continuam marginalizando os trabalhadores oriundos do meio rural, limitando sua inserção no mercado de trabalho. Esse fenômeno tem levado a profundas diferenças sociais e econômicas, que são percebidas no espaço social, através da segregação urbana. As entrevistas sobre a experiência de trabalho dos migrantes rurais em Montes Claros revelam a formação da sociedade brasileira do terceiro milênio como uma história da (re) produção de indignas condições de vida.--------------------------------------------This piece of work presents reflections about the rural internal dynamics in Brazil with emphasis to the North of Minas Gerais. The reflection about the rural migration in the city of the outback's of Minas Gerais proves the hipothesis that the imigration is taking place more and more inside the regions, due to the growth impelled by the state in some cities and also the delusion with the metropolis, as a consequence of the process of organization of the work which produces a perverse combination whose main cause and consequence is the disrespect to the migrant workers. The analisys of the rural migrant sócio-economic profile and his integration in the workmarket, the possibilities, placement and the informal market as via of de sub integration, reveals that the social spacial relations keep segregating workers coming from the rural áreas, limiting their insertion in the workmarket. This fenomenon has led to deep social and economic differences, which are noticed in the social space, through the urban segregation. The interviews about the work experience of the rural migrants reveals the formation of the Brazilian society of the third millenium as a history of the (re)production of unfair life conditions.
A Gaia early DR3 mock stellar catalog: Galactic prior and selection function
Creators: name: Rybizki, Jan
name: Demleitner, Markus
name: Bailer-Jones, Coryn
name: Tio, Piero Dal
name: Cantat-Gaudin, Tristan
name: Fouesneau, Morgan
name: Chen, Yang
name: Andrae, Rene
name: Girardi, Leo
name: Sharma, Sanjib
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a mock stellar catalog, matching in volume, depth and data model the content of the planned Gaia early data release 3 (Gaia EDR3). We have generated our catalog (GeDR3mock) using galaxia, a tool to sample stars from an underlying Milky Way (MW) model or from N-body data. We used an updated Besançon Galactic model together with the latest PARSEC stellar evolutionary tracks, now also including white dwarfs. We added the Magellanic clouds and realistic open clusters with internal rotation. We empirically modelled uncertainties based on Gaia DR2 (GDR2) and scaled them according to the longer baseline in Gaia EDR3. The apparent magnitudes were reddened according to a new selection of 3D extinction maps. To help with the Gaia selection function we provide all-sky magnitude limit maps in G and BP for a few relevant GDR2 subsets together with the routines to produce these maps for user-defined subsets. We supplement the catalog with photometry and extinctions in non-Gaia bands. The catalog is available in the Virtual Observatory and can be queried just like the actual Gaia EDR3 will be. We highlight a few capabilities of the Astronomy Data Query Language (ADQL) with educative catalog queries. We use the data extracted from those queries to compare GeDR3mock to GDR2, which emphasises the importance of adding observational noise to the mock data. Since the underlying truth, e.g. stellar parameters, is know in GeDR3mock, it can be used to construct priors as well as mock data tests for parameter estimation. All code, models and data used to produce GeDR3mock are linked and contained in galaxia_wrap, a python package, representing a fast galactic forward model, able to project MW models and N-body data into realistic Gaia observables.
description: 22 pages, 20 figures, accepted by PASP, catalog info and download and ADQL interface: http://dc.g-vo.org/tableinfo/gedr3mock.main ; relevant github repositories: https://github.com/jan-rybizki/Galaxia_wrap ; https://github.com/jan-rybizki/gdr2_completeness
Figure S1 from Integrating real-time data analysis into automatic tracking of social insects
Creators: name: Sclocco, Alessio
name: Shirlyn Jia Yun Ong
name: Aung, Sai Yan Pyay
name: Teseo, Serafino
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Biological Engineering
subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Figure S1. a.- c. Classes of code visibility (horizontal, tilted, invisible). d.-f. Classes of image blurriness (sharp, blurry, very blurry). g.-j. Examples of instances in which codes became invisible: g. an ant covering another ant's code; h. an ant trying to climb the tracking setup wall; i. an ant grooming her gaster; j. an ant walking on the lower side of the glass lid covering the nest chambers. k. ‘Double detection’. l. ‘Double plus one detection’.
Lens modelling and H_0 estimate in quadruply lensed systems
Creators: name: Tortora, C.
name: Piedipalumbo, E.
name: Cardone, V. F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a numerical method to estimate the lensing parameters and the Hubble constant H_0 from quadruply imaged gravitational lens systems. The lens galaxy is modeled using both separable deflection potentials and constant mass-to-light ratio profiles, while possible external perturbations have been taken into account introducing an external shear. The model parameters are recovered inverting the lens and the time delay ratio equations and imposing a set of physically motivated selection criteria. We investigate correlations among the model parameters and the Hubble constant. Finally, we apply the codes to the real lensed quasars PG 1115+080 and RX J0911+0551, and combine the results from these two systems to get H_0 = 56 +/- 23 km/(s Mpc). In addition, we are able to fit to the single systems a general elliptical potential with a non fixed angular part, and then we model the two lens systems with the same potential and a shared H_0: in this last case we estimate H_0=49_(-11)^(+6) km/(s Mpc).
description: 14 pages, 8 figures, accepted by MNRAS
Garside groups are strongly translation discrete
Creators: name: Lee, Sang Jin
Publisher: name: arXiv
Year: 2004
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: The Garside group, as a generalization of braid groups and Artin groups of finite types, is defined as the group of fractions of a Garside monoid. We show that the semidirect product of Garside monoids is a Garside monoid. We use the semidirect product $\mathbb Z\ltimes G^n$ of the infinite cyclic group $\mathbb Z$ and the cartesian product $G^n$ of a Garside group $G$ to study the properties of roots and powers of elements in $G$. The main result is an estimate of the growth of the minimal word-length of powers of elements in Garside groups, when the generating set is the set of simple elements. A direct application is that the set of translation numbers in Garside groups is discrete. It gives an affirmative answer to the question of Gersten and Short for the case of Garside groups. The original question is for biautomatic groups. And we show that the root extraction problem in a Garside group $G$ can be reduced to a conjugacy problem in $\mathbb Z\ltimes G^n$. Using the algorithm for the conjugacy problem in Garside groups, the root extraction problem is decidable for any Garside group.
description: Title has been changed from "Growth of minimal word-length in Garside groups" To appear in Journal of Algebra
CERTIFICAÇÃO EUREPGAP NO SISTEMA AGROINDUSTRIAL DO LIMÃO TAHITI
Creators: name: Paulino, Sonia Regina
name: Jacometi, Wagner Antonio
name: Paulino, Sonia Regina
name: Jacometi, Wagner Antonio
Publisher: name: Unknown
Year: 2008
Subjects: subject: Crop Production/Industries
subject: certificação
subject: EUREPGAP
subject: fruticultura
subject: sistema agroindustrial
subject: meio ambiente
subject: certification
subject: fruit production
subject: agro-industrial system
subject: environment

description: O artigo analisa as mudanças verificadas no sistema produtivo do limão tahiti a partir da implantação da certificação EUREPGAP. Trata-se de um certificado de qualidade que inclui explicitamente entre os seus princípios a proteção ambiental e a saúde, segurança e bem-estar do trabalhador. É considerado um grupo de produtores de um dos maiores pólos fruticultores de limão tahiti do estado de São Paulo, pólo este que vem sendo foco de projetos voltados à competitividade e à inserção no mercado externo, desenvolvidos pelo Serviço Brasileiro de Apoio às Micro e Pequenas Empresas (SEBRAE) e Associação Brasileira dos Produtores e Exportadores de Limão (ABPEL). A análise proposta é realizada com base no conceito e na abordagem de sistemas agroindustriais. Verificou-se que a inserção dos produtores rurais, na maior parte pequenos produtores, no mercado internacional vem sendo acompanhada de mudanças de ampla incidência nos diferentes elos constitutivos do sistema agroindustrial: ambiente institucional, fornecimento de insumos, propriedade rural, agroindústria, distribuição e serviços de apoio. -------------------------------------------------------The article analyzes the change in production systems of tahiti lime carrying through an implantation of the certification European Retailers Produce Working Group - Agricultural Good Practices (EUREPGAP), which is a quality certification based on environmental protection and worker health, safety and welfare. It was considered an important farmer group of the State of São Paulo, where there are important projects focused on competitiveness and insertion in external markets supported by the Brazilian Agency for Support of Micro and Small Enterprises (SEBRAE) and the Lime Farmer and Exporter Brazilian Association (ABPEL). The proposed analyze is carried out through agro-industrial system concept and approach. It was verified the insertion of farmers in european market. It is followed by changes with wide incidence in agro-industrial system.
A Remarkable Low-Mass X-ray Binary within 0.1 pc of the Galactic Center
Creators: name: Muno, M. P.
name: Lu, J. R.
name: Baganoff, F. K.
name: Brandt, W. N.
name: Garmire, G. P.
name: Ghez, A. M.
name: Hornstein, S. D.
name: Morris, M. R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent X-ray and radio observations have identified a transient low-mass X-ray binary (LMXB) located only 0.1 pc in projection from the Galactic center, CXOGC J174540.0-290031. In this paper, we report the detailed analysis of X-ray and infrared observations of the transient and its surroundings. Chandra bservations detect the source at a flux of F_X = 2e-12 erg cm^-2 s^-1 (2-8 keV). After accounting for absorption both in the interstellar medium and in material local to the source, the implied luminosity of the source is only L_X = 4e34 erg/s (2-8 keV; D=8 kpc). However, the diffuse X-ray emission near the source also brightened by a factor of 2. The enhanced diffuse X-ray emission lies on top of a known ridge of dust and ionized gas that is visible infrared images. We interpret the X-ray emission as scattered flux from the outburst, and determine that the peak luminosity of CXOGC J174540.0-290031 was >2e36 erg/s. We suggest that the relatively small observed flux results from the fact that the system is observed nearly edge-on, so that the accretion disk intercepts most of the flux emitted along our line of sight. We compare the inferred peak X-ray luminosity to that of the radio jet. The ratio of the X-ray to radio luminosities, L_X/L_R<1e4, is considerably smaller than in other known LMXBs (> 1e5). This is probably because the jets are radiating with unusually high efficiency at the point where they impact the surrounding interstellar medium. This hypothesis is supported by a comparison with mid-infrared images of the surrounding dust. Finally, we find that the minimum power required to produce the jet, L_jet~1e37 erg/s, is comparable to the inferred peak X-ray luminosity. This is the most direct evidence yet obtained that LMXBs accreting at low rates release about half of their energy as jets.
description: 11 pages, including 9 figures (6 color). submitted to ApJ
Gapped boundary theories in three dimensions
Creators: name: Freed, Daniel S.
name: Teleman, Constantin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Algebra (math.QA)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We prove a theorem in 3-dimensional topological field theory: a Reshetikhin-Turaev theory admits a nonzero boundary theory iff it is a Turaev-Viro theory. The proof immediately implies a characterization of fusion categories in terms of dualizability. The main theorem applies to physics, where it implies an obstruction to a gapped 3-dimensional quantum system admitting a gapped boundary theory. Appendices on bordism multicategories and on internal duals may be of independent interest.; v2 extensive revision: added theorem on dualizable 2-categories, material on natural transformations, reworked theorems and several proofs, and more.
description: 51 pages, 32 figures; v2 major revision, including new Appendix B; v2 minor changes for publication in Commun. Math. Phys
Extending Science from Lunar Laser Ranging
Creators: name: Viswanathan, Vishnu
name: Mazarico, Erwan
name: Merkowitz, Stephen
name: Williams, James G.
name: Turyshev, Slava G.
name: Currie, Douglas G.
name: Ermakov, Anton I.
name: Rambaux, Nicolas
name: Fienga, Agnès
name: Courde, Clément
name: Chabé, Julien
name: Torre, Jean-Marie
name: Bourgoin, Adrien
name: Schreiber, Ulrich
name: Eubanks, Thomas M.
name: Wu, Chensheng
name: Dequal, Daniele
name: Dell'Agnello, Simone
name: Biskupek, Liliane
name: Müller, Jürgen
name: Kopeikin, Sergei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The Lunar Laser Ranging (LLR) experiment has accumulated 50 years of range data of improving accuracy from ground stations to the laser retroreflector arrays (LRAs) on the lunar surface. The upcoming decade offers several opportunities to break new ground in data precision through the deployment of the next generation of single corner-cube lunar retroreflectors and active laser transponders. This is likely to expand the LLR station network. Lunar dynamical models and analysis tools have the potential to improve and fully exploit the long temporal baseline and precision allowed by millimetric LLR data. Some of the model limitations are outlined for future efforts. Differential observation techniques will help mitigate some of the primary limiting factors and reach unprecedented accuracy. Such observations and techniques may enable the detection of several subtle signatures required to understand the dynamics of the Earth-Moon system and the deep lunar interior. LLR model improvements would impact multi-disciplinary fields that include lunar and planetary science, Earth science, fundamental physics, celestial mechanics and ephemerides.
description: 8 pages, 1 figure, A white paper submitted to the Committee on the Planetary Science Decadal Survey (2023-2032) of The National Academies of Sciences
The Solution of the Milne Problem for Magnetized Atmosphere
Creators: name: Shternin, P. S.
name: Gnedin, Yu. N.
name: Silant'ev, N. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The numerical solution of the Milne problem for semi-infinite plane-parallel magnetized electron atmosphere is obtained. It is assumed that magnetic field is directed along the normal to the atmosphere. The angular dependence, the polarization degree and positional angle of outgoing radiation are presented in the tables for various values of the Faraday rotation parameter and the degree of absorption q=0, 0.2 and 0.4. We assume that magnetic field B~1000000G when one can neglect the effects of circular dichroism and take into account only the Faraday rotation effect.
description: 14 pages
Recursive Bayesian traffic prediction for performance improvement in OBS networks
Creators: name: Li, Rong
Publisher: name: University of British Columbia
Year: 2009

description: This thesis deals with traffic prediction in Optical Burst Switched (OBS) networks with self-similar traffic, i.e., traffic with long-range dependence (LRD) properties. Aggregated traffic in high speed optical networks exhibits LRD properties. OBS is a recent promising optical network technology to facilitate IP-Over-WDM (Internet Protocol Over Wavelength Division Multiplexing). To improve the quality of service (QoS) in OBS transmission networks, traffic prediction is required for dynamic resource reservation. We present and discuss a model of IP traffic based on MMPP (Markov Modulated Poisson Process), which approximates LRD traffic by mimicking the hierarchical generation of data by Internet users. The MMPP model is capable of effectively capturing the key aspects of the traffic measured on an OBS edge router, hence representing an aggregation of the traffic generated by a number of sources. The main contribution of this thesis is to derive an optimal Bayesian predictor for the burst size at the ingress router of an OBS network for MMPP approximations of LRD traffic. Bayesian prediction yields the MMSE (Minimum Mean Square Error) estimate of the burst size. As shown in a simulated OBS testbed, such Bayesian predictor can yield substantial improvement in latency reduction and service differentiation of OBS network compared to linear predictors, without substantial increasing in computational complexity.