cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Mapping the Galactic disk with the LAMOST and $Gaia$ Red clump sample: V: On the origin of the "young" [$α$/Fe]-enhanced stars
Creators: name: Sun, Weixiang
name: Huang, Yang
name: Wang, Haifeng
name: Wang, Chun
name: Zhang, Meng
name: Li, Xinyi
name: Chen, Bingqiu
name: Zhang, Huawei
name: Wei, Dandan
name: Jiang, Dengkai
name: Liu, Xiaowei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using a sample of nearly 140,000 primary red clump stars selected from the LAMOST and $Gaia$ surveys, we have identified a large sample of "young" [$α$/Fe]-enhanced stars with stellar ages younger than 6.0 Gyr and [$α$/Fe] ratios greater than 0.15 dex. The stellar ages and [$α$/Fe] ratios are measured from LAMOST spectra, using a machine learning method trained with common stars in the LAMOST-APOGEE fields (for [$α$/Fe]) and in the LAMOST-$Kepler$ fields (for stellar age). The existence of these "young" [$α$/Fe]-enhanced stars is not expected from the classical Galactic chemical evolution models. To explore their possible origins, we have analyzed the spatial distribution, and the chemical and kinematic properties of those stars and compared the results with those of the chemically thin and thick disk populations. We find that those "young" [$α$/Fe]-enhanced stars have distributions in number density, metallicity, [C/N] abundance ratio, velocity dispersion and orbital eccentricity that are essentially the same as those of the chemically thick disk population. Our results clearly show those so-called "young" [$α$/Fe]-enhanced stars are not really young but $genuinely$ $old$. Although other alternative explanations can not be fully ruled out, our results suggest that the most possible origin of these old stars is the result of stellar mergers or mass transfer.
description: 10 pages, 10 figures, accepted for publication in ApJ
A SUSTENTABILIDADE DA AGRICULTURA ORGÂNICA FAMILIAR DOS PRODUTORES ASSOCIADOS À APOI (ASSOCIAÇÃO DOS PRODUTORES ORGÂNICOS DA IBIAPABA-CE)
Creators: name: Oliveira, Ana Ferreira Dos Santos
name: Khan, Ahmad Saeed
name: Lima, Patricia Veronica Pinheiro Sales
name: Silva, Lucia Maria Ramos
name: Oliveira, Ana Ferreira Dos Santos
name: Khan, Ahmad Saeed
name: Lima, Patricia Veronica Pinheiro Sales
name: Silva, Lucia Maria Ramos
Publisher: name: Unknown
Year: 2008
Subjects: subject: Environmental Economics and Policy
subject: Farm Management
subject: Agricultura Orgânica
subject: Agricultura Familiar
subject: Agricultura Sustentável
subject: Organic Agriculture
subject: Family farminglture
subject: Sustainable Agriculture

description: A agricultura orgânica é uma atividade que visa promover a preservação do meio ambiente, respeitando a biodiversidade e as atividades biológicas do solo. Desta forma, esta atividade enfatiza o uso de práticas de manejo em oposição ao uso de agrotóxicos, assim fixando de modo mais definitivo o homem no campo. Acredita-se que esta atividade seja uma forma de produção ecologicamente sustentável, socialmente justa e economicamente viável em todas as escalas da produção. No Ceará a agricultura orgânica tem uma área plantada de 13.820 ha, espalhados em vários municípios, sendo a maior concentração na microrregião da Ibiapaba. Esse trabalho tem como objetivo geral analisar a sustentabilidade da agricultura orgânica familiar dos produtores associados à APOI (Associação dos Produtores Orgânicos da Ibiapaba)-CE e fazer uma análise dos indicadores, econômico, técnico-agronômico, manejo, ecológico e político-institucional. O resultado permite concluir que o sistema de produção da APOI é sustentável, embora os indicadores econômico, técnico-agronômico e político-institucional, demonstrem que precisam ser melhorados para obtenção do Índice de Sustentabilidade.---------------------------------------------The organic agriculture is an activity which aims for environment preservation, respecting biodiversity an biological activities of the soil. This activity emphasizes the use of management techniques in contrast to the use of agrochemicals, thus definitely fixing man in the countryside. It is believed that this activity is a method of production which is ecologically sustainable, socially fair and economically feasible in all scales of production. In Ceará, the organic agriculture has a cultivated area of 13.820 ha spread over many counties, being the biggest concentration in the micro region of Ibiapaba.. This paper aims to analyze the sustainability of organic agriculture of family producers associated to APOI (Associação dos Produtores Orgânicos da Ibiapaba)-CE and make an analysis of the economic, technical-agronomical, managementl, ecological and political-institutional indicators. The results allowed us to conclude that the APOI production system is sustainable, although the economic, technical-agronomical and political-institutional indicators need to be improved to obtain higher sustainability index.
title: 02_0230
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Transverse Magnetic Anisotropy in Mn12-acetate: Direct Determination by Inelastic Neutron Scattering
Creators: name: Bircher, Roland
name: Chaboussant, Gregory
name: Sieber, Andreas
name: Guedel, Hans U.
name: Mutka, Hannu
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A high resolution inelastic neutron scattering (INS) study of fully deuterated Mn$_{12}$-acetate provides the most accurate spin Hamiltonian parameters for this prototype single molecule magnet so far. The Mn$_{12}$-clusters deviate from axial symmetry, a non-zero rhombic term in the model Hamiltonian leading to excellent agreement with observed positions and intensities of the INS peaks. The following parameter set provides the best agreement with the experimental data: $D=-0.0570(1)$ meV, $B_{4}^0=-2.78(7)\cdot 10^{-6}$ meV, $B_{4}^4=-3.2(6)\cdot 10^{-6}$ meV and $\mid$\textit{E}$\mid =6.8(15)\cdot 10^{-4}$ meV. Crystal dislocations are not the likely cause of the symmetry lowering. Rather, this study lends strong support to a recently proposed model, which is based on the presence of several molecular isomers with distinct spin Hamiltonian parameters.
description: 4 pages, 4 figures
Numeric simulation of relativistic stellar core collapse and the formation of Reissner-Nordstrom space-times
Creators: name: Ghezzi, Cristian R.
name: Letelier, Patricio S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The time evolution of a set of 22 Mo unstable charged stars that collapse is computed integrating the Einstein-Maxwell equations. The model simulate the collapse of an spherical star that had exhausted its nuclear fuel and have or acquires a net electric charge in its core while collapsing. When the charge to mass ratio is Q/M >= 1 the star do not collapse and spreads. On the other hand, it is observed a different physical behavior with a charge to mass ratio 1 > Q/ M > 0.1. In this case, the collapsing matter forms a bubble enclosing a lower density core. We discuss an immediate astrophysical consequence of these results that is a more efficient neutrino trapping during the stellar collapse and an alternative mechanism for powerful supernova explosions. The outer space-time of the star is the Reissner-Nordstrom solution that match smoothly with our interior numerical solution, thus the collapsing models forms Reissner-Nordstrom black holes.
description: 13 pages, 13 figures, paper accepted
ANÁLISE ECONÔMICA DA OVINOCULTURA NA METADE SUL DO RIO GRANDE DO SUL, BRASIL.
Creators: name: Viana, Joao Garibaldi Almeida
name: Silveira, Vicente Celestino Pires
name: Viana, Joao Garibaldi Almeida
name: Silveira, Vicente Celestino Pires
Publisher: name: Unknown
Year: 2008
Subjects: subject: Livestock Production/Industries
subject: custos de produção
subject: ovinos
subject: rentabilidade
subject: production costs
subject: sheep
subject: profitability

description: Com o objetivo verificar os principais centros de custos, os custos de produção e a rentabilidade da produção ovina na metade sul do Rio Grande do Sul foram realizados a análise econômica de sete produtores entre o período de agosto de 2006 a julho de 2007. Os dados mensais levantados consistem em todas as despesas, receitas e os valores referentes aos produtos consumidos nas propriedades. Também foram realizados os inventários patrimoniais para o cálculo de depreciação e evolução dos ativos físicos. Os custos foram segmentados em custos variáveis, custos fixos, custo operacional e custo total. Indicadores econômicos foram formulados a fim de verificar a rentabilidade da atividade. Os custos variáveis e os custos de oportunidade foram às categorias de custo que mais impactaram a formação do custo total. Dentro do custo operacional destaca-se o elevado custo com mão de obra, sendo o grupo de custo que mais onerou a produção ovina. A ovinocultura mostrou-se como uma atividade rentável quando verificados os indicadores de margem bruta e renda operacional agrícola. Entretanto, a margem líquida apresentou valores negativos em todas as propriedades analisadas. Os custos por quilograma de peso vivo variaram de R$ 0,86 a R$ 2,02 enquanto os custos por quilograma de lã variaram de R$ 1,58 a R$ 3,67. Constatou-se que o indicador desfrute de produção influencia diretamente os custos por quilograma de peso vivo.----------------------------------------------------The goal of this study is to examine the production costs and profitability of the sheep production system in the south of Rio Grande do Sul. The economic analysis included seven sheep farms throughout 12 months, between August of 2006 and July of 2007. Expenses, revenue and value of products consumed in the farm were measured monthly. Depreciation and physical assets were calculated based on patrimony balance. Costs were divided in variable costs, fixed costs, operational costs and total costs. Economic indicators were computed to evaluate sheep raising profitability. Results showed that variable and opportunity costs had the largest impact on total costs. In terms of operational costs, labor costs were the largest expense for sheep farms. Overall, sheep raising is a profitable activity, as indicated by positive gross margins and operational revenue indicators. However, net margins were negative across all farms included in the study. Costs per kilogram of live stock varied from R$ 0,86 to R$ 2,02, while the costs per kilogram of wool varied from R$1,58 to R$3,67. The production acquired is a variable that directly influences the costs per kilogram of live stock.
On the higher moments of the error term in the divisor problem
Creators: name: Ivić, Aleksandar
name: Sargos, Patrick
Publisher: name: arXiv
Year: 2004
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11N37; 11M06

description: Let $Δ(x)$ denote the error term in the Dirichlet divisor problem. Our main results are the asymptotic formulas $$ \int_1^X Δ^3(x){\rm d}x = BX^{7/4} + O_ε(X^{β+ε}) \qquad(B > 0) $$ and $$ \int_1^X Δ^4(x){\rm d}x = CX^2 + O_ε(X^{γ+ε}) \qquad(C > 0) $$ with $β= 7/5, γ= 23/12$. This improves on the values $β= 47/28, γ= 45/23$, due to K.-M. Tsang. A result on the integrals of $Δ^3(x)$ and $Δ^4(x)$ in short intervals is also proved.
description: 27 pages
Patrimônio Imaterial e museus reflexões sobre processos de patrimonialização e de musealização vinculados às políticas culturais
Creators: name: Núcleo Multidimensional De Gestão Do Patrimônio E De Documentação Em Museus (NUGEP) Universidade Federal Do Estado Do Rio De Janeiro (UNIRIO)
name: Barboza, Alice
name: Mendonça, Elizabete De Castro
Publisher: name: figshare
Year: 2020
Subjects: subject: Museology
subject: 210204 Museum Studies
subject: FOS: Media and communications

description: A relação entre materialidade e imaterialidade vinculada ao patrimônio cultural musealizado há décadas é amplamente debatida nas reflexões sobre processos de patrimonialização e musealização. No entanto, a relação entre patrimônio imaterial instituído e museus precisa estar mais presente no bojo das discussões acadêmicas, institucionais e socioculturais. Tal debate mostra-se essencial, porque está associado à reflexão sobre o panorama das políticas públicas para a área da cultura implementadas, pelo menos nos últimos 15 anos, pelo Estado brasileiro. Com base nessa premissa, este texto busca fazer breves apontamentos sobre os processos de musealização na salvaguarda do patrimônio imaterial, bem como a importância de musealizar um bem cultural já patrimonializado.
Referência eletrônica do artigo:
BARBOZA, Alice; MENDONÇA, Elizabete de Castro. Patrimônio imaterial e museus: reflexões sobre processos de patrimonialização e de musealização vinculados às políticas culturais. Samba em revista, Rio de Janeiro, n. 8, ano 8, p. 20-25, 2016. ISSN: 2176-4425. Disponível em: . Acesso em: [inserir data de consulta].DOI: 10.6084/m9.figshare.12388850
Field-Induced Tunneling Ionization and Terahertz-Driven Electron Dynamics in Liquid Water
Creators: name: Ghalgaoui, Ahmed
name: Koll, Lisa-Marie
name: Schütte, Bernd
name: Fingerhut, Benjamin P.
name: Reimann, Klaus
name: Woerner, Michael
name: Elsaesser, Thomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Liquid water at ambient temperature displays ultrafast molecular motions and concomitant fluctuations of very strong electric fields originating from the dipolar H2O molecules. We show that such random intermolecular fields induce tunnel ionization of water molecules, which becomes irreversible if an external terahertz (THz) pulse imposes an additional directed electric field on the liquid. Time-resolved nonlinear THz spectroscopy maps charge separation, transport and localization of the released electrons on a few-picosecond time scale. The highly polarizable localized electrons modify the THz absorption spectrum and refractive index of water, a manifestation of a highly nonlinear response. Our results demonstrate how the interplay of local electric field fluctuations and external electric fields allows for steering charge dynamics and dielectric properties in aqueous systems.
Um museu que dá samba! A Musealização como Instrumento de Salvaguarda das Matrizes do Samba Carioca
Creators: name: Núcleo Multidimensional De Gestão Do Patrimônio E De Documentação Em Museus (NUGEP) Universidade Federal Do Estado Do Rio De Janeiro (UNIRIO)
name: Silva, Paula C. Leite E
name: Mendonça, Elizabete De Castro
Publisher: name: figshare
Year: 2020
Subjects: subject: Museology
subject: 210204 Museum Studies
subject: FOS: Media and communications

description: A proposta de criação do Museu do Samba resulta do processo de Patrimonialização das Matrizes do Samba do Rio de Janeiro. Soma-se a isto a experiência de ações isoladas que, ao longo do histórico institucional, buscam aproximações com os processos de Musealização. Considerar essa articulação entre os processos de Patrimonialização de bens imateriais e de Musealização permite-nos refletir sobre o papel da Museologia e dos museus no âmbito da Política Nacional de Patrimônio
Imaterial (PNPI). Nesta vertente, a presente investigação tem como objetivo geral analisar, com base nos embasamentos conceituais do campo da Museologia, o discurso institucional e as práticas do Centro Cultural Cartola (foco do projeto de criação do Museu do Samba) no que tange o paralelo entre Patrimonialização e Musealização de referências culturais imateriais. Para este estudo de caso foram coletadas e analisadas referências bibliográficas e documentos institucionais, e também realizada observação sistemática sobre o funcionamento do Museu. Desse modo, observa-se a utilização do processo de Musealização como estratégia de Salvaguarda para as Matrizes do Samba do Rio de Janeiro e evidencia-se também o papel que a Museologia e os museus podem desempenhar no âmbito das políticas públicas para o Patrimônio Imaterial no Brasil, configurado-se como importantes instrumentos para ações de salvaguarda de bens dessa natureza.
Referência eletrônica do artigo:
SILVA, Paula C. Leite e; MENDONÇA, Elizabete de Castro. Um museu que dá samba! A musealização como instrumento de salvaguarda das matrizes do samba carioca. In: Seminário Brasileiro de Museologia. n. III, 2017, Pará. Anais do III Sebramus. Pará: Universidade Federal do Pará, 2017, p. 1-22. ISSN 2446-8940. Disponível em: . Acesso em: [inserir data de consulta].DOI: 10.6084/m9.figshare.12388826
Who Gains and Who Loses from China's Growth?
Creators: name: Cheptea, Angela
name: Cheptea, Angela
Publisher: name: Unknown
Year: 2011
Subjects: subject: International Relations/Trade
subject: China
subject: Export Performance
subject: Shift-Share

description: Emerging countries have been winning large market shares since the early 1990s. Among these, China stands out with the most remarkable performance: it almost tripled its world market share since 1994 reaching 16.1% in 2007. The present paper attempts to identify the countries that have profited the most from this increase in the size of the Chinese market. I use an econometric shift-share methodology, that permits to identify for each trade flow the share of growth arising from the capacity to target the products and markets with the highest increase in demand, and the share due exclusively to exporter’s performance.
Technical Change Performance and Water Use Efficiency in the Irrigated Areas: Data Envelopment Analysis Approach
Creators: name: Chemak, Fraj
name: Chemak, Fraj
Publisher: name: Unknown
Year: 2011
Subjects: subject: Resource /Energy Economics and Policy
subject: Irrigated Area
subject: Technical Efficiency
subject: Water Use Efficiency
subject: Productivity Change
subject: Data Envelopment Analysis

description: In order to cope with the water scarcity, Tunisia has to manage efficiently the water demand of the economic and social sectors mainly that of the agricultural irrigated activities. Within this context, this investigation aims to analyze the technical efficiency, the water use efficiency and the dynamic of the productivity of the irrigated areas in the Sidi Bouzid region. Farm surveys have been carried out during 2003 and 2007 cropping years and technology performance has been assessed using Data Envelopment Analysis approach. Malmquist index has been also computed in order to characterize the productivity change. Empirical findings showed that the technical efficiency of the farms has increased by 17% during this period leading to an improvement of the water use efficiency up to 22%. Both, the technical efficiency change as well as the technical change reveal a positive impact on the productivity change. However, in 2007, the water use efficiency was only 78%. Therefore, farmers have to improve further their irrigated practices in order to save more water.
Pressure dependence of critical temperature in MgB2 and two bands Eliashberg theory
Creators: name: Ummarino, G. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The variation of the superconducting critical temperature Tc as a function of the pressure p in the magnesium diboride MgB2 has been studied in the framework of two-bands Eliashberg theory and traditional phonon coupling mechanism. I have solved the two-bands Eliashberg equations using first-principle calculations or simple assumptions for the variation, with the pressure, of the relevant physical quantities. I have found that the experimental Tc versus p curve can be fitted very well and information can be obtained on the dependence of the electron-phonon interaction matrix  by pressure. The pressure dependence of the superconductive gaps Delta{sigma} and Delta{pi} is also predicted.
description: 6 pages, 7 figures
Democracia cultural, museu e patrimônio: relações para a garantia dos direitos culturais
Creators: name: Núcleo Multidimensional De Gestão Do Patrimônio E De Documentação Em Museus (NUGEP) Universidade Federal Do Estado Do Rio De Janeiro (UNIRIO)
name: Barboza, Alice
name: Mendonça, Elizabete De Castro
Publisher: name: figshare
Year: 2020
Subjects: subject: Museology
subject: 210204 Museum Studies
subject: FOS: Media and communications

description: Este artigo realiza uma revisão da literatura sobre a relação entre Democracia Cultural, Museus, Patrimônio e Modernidade, tentando compreender os desafios que tais conceitos apresentam para as ações de Democracia Cultural. Para tanto, entende-se a Museologia como área de conhecimento que atribui valor, cria narrativas e é também espaço de poder. O campo dos Museus e do Patrimônio se estrutura simultaneamente ao surgimento da Modernidade, da conquista da América e da centralização de poder que a Europa passa a ter sobre o resto do globo. No entanto, atualmente o debate a respeito de um modelo de gestão cultural baseado no paradigma da Democracia Cultural permite repensar o papel dos Museus e do Patrimônio enquanto campos que contribuem para a garantia dos direitos culturais, para promover a cidadania entre os diferentes grupos culturais.
Referência eletrônica do capítulo do livro:
BARBOZA, Alice; MENDONÇA, Elizabete de Castro.Democracia cultural, museu e patrimônio: relações para a garantia dos direitos culturais. Museus e democracia cultural: diálogos e tensões. E-cadernos CES [Online]. Coimbra, n. 30, 14-38p, 2018. ISSN: 1647-0737. Disponível em:. Acessado em: [inserir data de consulta].DOI:10.4000/eces.3674
Effect of a finite-time resolution on Schrödinger Cat States in complex collisions
Creators: name: Benet, L.
name: Kun, S. Yu.
name: Qi, Wang
name: Denisov, V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the effect of finite time resolution on coherent superpositions of rotating clockwise and anticlockwise wave packets in the regime of strongly overlapping resonances of the intermediate complex. Such highly excited deformed complexes may be created in binary collisions of heavy-ions, molecules and atomic clusters. It is shown that time averaging reduces the interference fringes acting effectively as dephasing. We propose a simple estimate of the ``critical'' time averaging interval. For the time averaging intervals bigger than the critical one the interference fringes wash out appreciably. This is confirmed numerically. We evaluate minimal energy intervals for measurements of the excitation functions needed to observe the Schrödinger Cat States. These should be easily observable in heavy-ion scattering. Such an experiment is suggested.
description: 7 pages, 2 figures (in colour); uses elsart.cls
Hail Insurance and Pesticide use in French agriculture: an empirical analysis of multiple risks management
Creators: name: Chakir, Raja
name: Hardelin, Julien
name: Chakir, Raja
name: Hardelin, Julien
Publisher: name: Unknown
Year: 2011
Subjects: Risk and Uncertainty

description: This paper investigates the determinants of rapeseed hail insurance and pesticide use decisions using individual panel data set of French farms covering the period from 1993 to 2004. Economic theory suggests that insurance and prevention decisions are not independent due to risk reduction and/or moral hazard effects. Statistical tests show that the pesticide use and hail insurance demand are endogenous to each other. An econometric model involving two simultaneous equations with a mixed censored/continuous dependent variables is then estimated. Estimation results show that rapeseed insurance demand has a positive and significant effect on pesticide use and vice versa. Insurance demand is also positively influenced by the yield’s coefficient of variation and the loss ratio, and negatively influenced by proxies for wealth (including CAP subsidies) and activity diversification.
Analytic model studies of polarized baryon production
Creators: name: Boldizsár, B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate known exact solutions of hydrodynamics and derive analytic formulas for the polarization of baryons produced at freeze-out. Such polarization (observed in high energy heavy-ion experiments) carries information on the time evolution of the quark-gluon plasma (sQGP), and our results give first analytic insight into the connection between this type of measurements and dynamical properties of the sQGP (e.g. vorticity). We present results for a rotating and acceleratingly expanding solution and also give hints on how to calculate the polarization using a rotating extension of the Buda--Lund parameterization.
description: 5 pages, 2 figures, 19th Workshop on Particle Correlations and Femtoscopy (WPCF 2019) conference
CURRENT STATE OF ARTIFICIAL INTELLIGENCE IN THE REPUBLIC OF UZBEKISTAN
Creators: name: Jabbarov Axmedjon Internal affairs officer of the Republic of Uzbekistan
Publisher: name: Zenodo
Year: 2024

description: The article examines the problems and opportunities related to the current state of artificial intelligence in Uzbekistan. It will address issues such as data privacy, ethical considerations, and the need for skilled AI professionals. At the same time, the author highlights the potential for economic growth, job creation and community development through the strategic adoption of AI technologies.

Key words: artificial intelligence, information technology, AI technology, intelligent teaching systems, internet of things (IoT), national strategy, Self-learning methods.
Characterization of the photomultiplier tubes for the scintillation detectors of GRANDProto35 experiment
Creators: name: Wang, Xu
name: Qian, Xiangli
name: Yu, Yanhong
name: Feng, Cunfeng
name: Martineau-Huynh, Olivier
name: Zhang, Yi
name: Gou, Quanbu
name: Liu, Wei
name: Feng, Youliang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: GRANDProto35 is the first stage of the GRAND project. It will be composed of an array of 35 radio antennas and 24 scintillation detectors, the radio and scintillating subarrays being triggered independently. The scintillation detector array allow to cross check,through an offline treatment, if the selected radio candidates are indeed air shower events and thus quantitatively determine the detection efficiency of the radio array. The Hamamatsu R7725 is candidate for the scintillation detector photomultiplier. The characteristics of the PMT will directly affects the time and energy resolution, dynamic detection range of a scintillation detector.In order to cover the large dynamic range, voltage divider circuit featured with dual-readoutwas designed for the PMT. In this paper,details about the system setup, measurement method and results will be described. Some characteristics of PMT were calibrated and researched: the absolution gain, single photoelectron (SPE) energy resolution, transit time spread (TTS), linear dynamic range and temperature dependence of PMT gain.
Time Spent for Food Information Search and Obesity: North-South Dualism in Italy
Creators: name: Cavaliere, Alessia
name: Banterle, Alessandro
name: Cavaliere, Alessia
name: Banterle, Alessandro
Publisher: name: Unknown
Year: 2011
Subjects: Food Consumption/Nutrition/Food Safety

description: In industrialized countries, the last 40 years has seen a marked change in the average level of per capita calorie intake, which has led to increased growth in overweight and obesity rates. There are many reasons to encourage public intervention aimed at facing the problems associated with excess body weight, and to promote healthy dietary habits. Among the public policies set out to reduce obesity rates, an important role is played by information measures. The purpose of this work is to analyse for the consumers the importance of food information in the allocation of free time, and to investigate the variables that affect the search for information. Following Drichoutis et al. (2008) we developed a conceptual framework through variables that affect the time spent searching for information. The study was conducted through an empirical analysis, and the sample consisted of 300 Italian consumers, 150 resident in Lombardy (northern Italy), and 150 in Apulia (southern Italy). The interviews were conducted in small shops, supermarkets and hypermarkets. For small shops we selected greengrocers, butcher's shops and shops selling dairy products. The data were analysed through OLS regression and ordinal regression models. The study, for the south sample, showed a relationship between the consumer willingness to devote time to information search and work flexibility, information stock, nutritional knowledge. In the case of northern sample, another variable that affects the time allocated for information search is BMI.
Democracia cultural, museu e patrimônio - relações para a garantia dos direitos culturais
Creators: name: Núcleo Multidimensional De Gestão Do Patrimônio E De Documentação Em Museus (NUGEP) Universidade Federal Do Estado Do Rio De Janeiro (UNIRIO)
name: Barboza, Alice
name: Mendonça, Elizabete De Castro
Publisher: name: figshare
Year: 2020
Subjects: subject: Museology
subject: 210204 Museum Studies
subject: FOS: Media and communications

description: Este artigo realiza uma revisão da literatura sobre a relação entre Democracia Cultural, Museus, Patrimônio e Modernidade, tentando compreender os desafios que tais conceitos apresentam para as ações de Democracia Cultural. Para tanto, entende-se a Museologia como área de conhecimento que atribui valor, cria narrativas e é também
espaço de poder. O campo dos Museus e do Patrimônio se estrutura simultaneamente ao surgimento da Modernidade, da conquista da América e da centralização de poder que a Europa passa a ter sobre o resto do globo. No entanto, atualmente o debate a respeito de um modelo de gestão cultural baseado no paradigma da Democracia Cultural permite repensar o papel dos Museus e do Patrimônio enquanto campos que contribuem para a garantia dos direitos culturais, para promover a cidadania entre os diferentes grupos culturais.
Examining the barriers and opportunities to local food system planning in the Georgia Basin : of planners, politics and the public
Creators: name: Bouris, Kristina Michele Evelyn
Publisher: name: University of British Columbia
Year: 2009

description: Given its inter-disciplinary nature and community-oriented perspective, the field of planning is well poised to help create more sustainable, local food systems. Yet the food system has been virtually ignored by the planning profession (Pothukuchi and Kaufman, 2000). Such ignorance is puzzling given the enormous importance of the food system to urban sustainability, a central issue of planning practice. Drawing on the theory of urban political ecology, I propose food system planning as an approach to designing and implementing sustainable urban systems. This thesis identifies the barriers and opportunities that exist to the emerging field of food system planning. Thirteen interviews were conducted with local government planners in the Georgia Basin region of British Columbia. Two central themes emerged from the research: first, political, public and institutional will are major factors in helping and/or hindering food system planning, a finding that supports urban political ecology theorists who contend that sustainable development is as much about governance as it is about ecology, community or economy. Second, food system planning faces a major barrier in that it is perceived as lying outside the roles and responsibilities of planners, a barrier attributed to a dualistic view of planning that sees agriculture as separate from the food system, social planning as separate from land use planning, and the domain of the public sector as separate from the domain of the market. These dualisms must be overcome if urban sustainability strategies, including food system planning, are to be successfully implemented. While the future of food system planning is not without significant challenges, the experiences of participants provided valuable insight into how the food system might be more comprehensively inserted into the local government planning agenda. Strategies are presented for advancing the field of food system planning in British Columbia, including recommendations for practice, policy and further study.
An analysis on the use of autoencoders for representation learning: fundamentals, learning task case studies, explainability and challenges
Creators: name: Charte, David
name: Charte, Francisco
name: del Jesus, María J.
name: Herrera, Francisco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: 68T05

description: In many machine learning tasks, learning a good representation of the data can be the key to building a well-performant solution. This is because most learning algorithms operate with the features in order to find models for the data. For instance, classification performance can improve if the data is mapped to a space where classes are easily separated, and regression can be facilitated by finding a manifold of data in the feature space. As a general rule, features are transformed by means of statistical methods such as principal component analysis, or manifold learning techniques such as Isomap or locally linear embedding. From a plethora of representation learning methods, one of the most versatile tools is the autoencoder. In this paper we aim to demonstrate how to influence its learned representations to achieve the desired learning behavior. To this end, we present a series of learning tasks: data embedding for visualization, image denoising, semantic hashing, detection of abnormal behaviors and instance generation. We model them from the representation learning perspective, following the state of the art methodologies in each field. A solution is proposed for each task employing autoencoders as the only learning method. The theoretical developments are put into practice using a selection of datasets for the different problems and implementing each solution, followed by a discussion of the results in each case study and a brief explanation of other six learning applications. We also explore the current challenges and approaches to explainability in the context of autoencoders. All of this helps conclude that, thanks to alterations in their structure as well as their objective function, autoencoders may be the core of a possible solution to many problems which can be modeled as a transformation of the feature space.
Influence of Animal Feeding on Milk Supply in Navarre
Creators: name: Casasnovas, Valero L.
name: Aldanondo, Ana Maria
name: Casasnovas, Valero L.
name: Aldanondo, Ana Maria
Publisher: name: Unknown
Year: 2011
Subjects: subject: Livestock Production/Industries
subject: multiproduct cost function
subject: panel data
subject: milk
subject: animal feed
subject: dairy farms

description: Determining the competitive position of dairy farms depends on several technological, economic and institutional variables. Among them, are remarkable those related to animal feeding in the current context of high variability on prices. In this context, the aim of our study is to analyze the effects on milk supply and the competitiveness of dairy farms with different models of land intensification, with greater reliance on market purchases or self production of livestock feed. Our work is based on an econometric approach to a variable cost function, in a fixed effects model for unbalanced panel data of specialized dairy farms in Navarre (Spain). From this region, we use 3 geographical areas in relation to the availability of grazing land. It has been tested the absence of sample selection bias and satisfaction of regularity conditions. The study shows a flexible milk farm supply with respect to the price of milk and very dependent on the evolution of feed prices. This aspect has been emphasized by the restructuring of farms, characterized by strong size increases and productivity gains based on a greater reliance on purchases of animal feed. The provision of grazing land has an important role in determining the average costs and farm profitability. In addition, grazing land use permits greater exploitation of economies of scale present in the dairy sector.
Lyman Break Galaxies at z = 4 - 6 in cosmological SPH Simulations
Creators: name: Night, Christopher
name: Nagamine, Kentaro
name: Springel, Volker
name: Hernquist, Lars
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We perform a spectrophotometric analysis of galaxies at redshifts z = 4 - 6 in cosmological SPH simulations of a Lambda CDM universe. Our models include radiative cooling and heating by a uniform UV background, star formation, supernova feedback, and a phenomenological model for galactic winds. Analysing a series of simulations of varying boxsize and particle number allows us to isolate the impact of numerical resolution on our results. Specifically, we determine the luminosity functions in B, V, R, i', and z' filters, and compare the results with observed galaxy surveys done with the Subaru telescope and the Hubble Space Telescope. We find that the simulated galaxies have UV colours consistent with observations and fall in the expected region of the colour-colour diagrams used by the Subaru group. Assuming a uniform extinction of E(B-V) = 0.15, we also find reasonable agreement between simulations and observations in the space density of UV bright galaxies at z = 3 - 6, down to the magnitude limit of each survey. For the same moderate extinction level of E(B-V) ~ 0.15, the simulated luminosity functions match observational data, but have a steep faint-end slope with alpha ~ -2.0. We discuss the implications of the steep faint-end slope found in the simulations.
description: 13 pages, 16 figures, MNRAS in press
ПОЛИМЕРНЫЕ КОМПОЗИТЫ, АРМИРОВАННЫЕ ПРИРОДНЫМИ ВОЛОКНАМИ
Creators: name: Адхамов Амурбек
name: Нумонов Аброр
Publisher: name: TECHика
Year: 2021
Subjects: Полимерные композиционные материалы
армирование
матрица
натуральные волокна.

description: В статье расммотрены возможности использования натуральных волокон различных растений для армирования полимерных композиционных материалов. Выявлено что вместо композитов, армированных стеклянными волокнами, для внутренней отделки автомобилей (например, дверных панелей) можно успешно применяють композиты, армированные природными волокнами. Для авиационного, аэрокосмического и автомобильного машиностроения разработываются биоразлагаемые и огнестойкие полимерные композиты с использованием конопли, льна и сои. Предполагается, что в недалеком будущем природные полимеры и волокна, а также полимерные композиты с их использованием будут составлять 15% от веса автомобиля.
Different types of photon entanglement from a constantly driven quantum emitter inside a cavity
Creators: name: Seidelmann, Tim
name: Cosacchi, Michael
name: Cygorek, Moritz
name: Reiter, Doris E.
name: Vagov, Alexei
name: Axt, Vollrath Martin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Bell states are the most prominent maximally entangled photon states. In a typical four-level emitter, like a semiconductor quantum dot, the photon states exhibit only one type of Bell state entanglement. By adding an external driving to the emitter system, also other types of Bell state entanglement are reachable without changing the polarization basis. In this paper, we show under which conditions the different types of entanglement occur and give analytical equations to explain these findings. We further identify special points, where the concurrence, being a measure for the degree of entanglement, drops to zero, while the coherences between the two-photon states stay strong. Results of this work pave the way to achieve a controlled manipulation of the entanglement type in practical devices.
description: 14 pages, 7 figures
Patrimônio Arqueológico dos protocolos mínimos à gestão de coleções
Creators: name: Núcleo Multidimensional De Gestão Do Patrimônio E De Documentação Em Museus (NUGEP) Universidade Federal Do Estado Do Rio De Janeiro (UNIRIO)
name: Santos, Heide Hoviene Dos
name: Mendonça, Elizabete De Castro
Publisher: name: figshare
Year: 2020
Subjects: subject: Museology
subject: 210204 Museum Studies
subject: FOS: Media and communications

description: Pensando no patrimônio arqueológico como fonte de informação, o presente estudo visa apresentar dados parciais da pesquisa de doutorado, a qual trata da gestão do patrimônio arqueológico, especificamente o gerenciamento de informações referentes às coleções que receberam endosso das instituições de pesquisa e de guarda de coleções arqueológicas vinculadas às Universidades Federais, como os museus e laboratórios, e na interface Museologia e Arqueologia. O objetivo é analisar a ação dos protocolos mínimos para ingresso de coleções e no diálogo desses com os procedimentos de concessão de endosso institucional, bem como estas concessões interferem na gestão dessas coleções arqueológicas sob sua tutela. A investigação se justifica devido à necessidade de que, a cada emissão de endosso, as instituições de pesquisa e de guarda reflitam e ajustem esse mecanismo, que é um termo de responsabilidades dado por elas aos projetos de salvamento arqueológico, a fim de que as condutas de gestão de coleções possibilitem a redução de lacunas informacionais sobre as coleções arqueológicas. Nesse sentido, este trabalho tem como base autores que discutem a relevância da gestão de coleções para o patrimônio arqueológico, do endosso institucional e da criação de políticas institucionais como os protocolos de ingressos de coleções e o diálogo mais estreito entre museólogos e arqueólogos. Para tanto, analisa e reflete a partir de textos e documentos que tragam considerações acerca do endosso institucional e da necessidade desse procedimento se tornar uma ferramenta eficaz para as instituições de pesquisa e de guarda, principalmente, no que se refere à gestão, pesquisa e disseminação da informação. Este estudo também se debruça sobre o aparato legal brasileiro, como Leis, Instruções Normativas, Decretos que envolvam o salvamento arqueológico, os órgãos encarregados por essas definições legais e as instituições de guarda. Observa-se que, por meio do procedimento de gestão de
coleções, a ação do endosso institucional pode ficar mais criteriosa, com a intenção de reduzir as lacunas referentes às coleções e que as políticas institucionais precisam atuar antes e durante o momento do salvamento e após a chegada das coleções à instituição. Isso permite concluir que, ao conceder o endosso institucional as instituições tornam-se responsáveis por vasta quantidade de coleções. Logo, a sua gestão merece atenção especial, principalmente na condução de ações que envolvem a melhoria das pesquisas e dos critérios adotados.
Quasi-particle model of strongly interacting matter
Creators: name: Bluhm, M.
name: Kampfer, B.
name: Soff, G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The successful quasi-particle model is compared with recent lattice data of the coefficients in the Taylor series expansion of the excess pressure at finite temperature and baryon density. A chain of approximations, starting from QCD to arrive at the model expressions for the entropy density, is presented.
description: Nov 2004. 4pp. Invited talk given at 8th International Conference on Strangeness in Quark Matter (SQM2004), Cape Town, South Africa, 15-20 Sep 2004
ПЕРСПЕКТИВЫ ПРИМЕНЕНИЯ ПКМ В АВТОМОБИЛЬНОЙ ПРОМЫШЛЕННОСТИ
Creators: name: Нумонов Аброр
name: Адхамов Амурбек
Publisher: name: TECHика
Year: 2021
Subjects: полимерные композиционные материалы (ПКМ)
BMC
углепластики
стеклопластики
автомобильная промышленность
автомобили.

description: Применение композиционных материалов осуществляется во все более широких масштабах. В автомобилестроении композиционные материалы используются уже много лет, и с каждым годом объем их применения растет. Если раньше ПКМ использовались в основном в качестве отделки салона и в деталях, не несущих значительных нагрузок, то в настоящее время полимеры стали применяться в крупногабаритных корпусных деталях, а зарубежные компании, такие как ВМW, Ford, Mercedes, AUDI, и вовсе изготавливают автомобили, кузов которых полностью состоит из композитов.