320 research outputs found
Levantamento das principais pragas e inimigos naturais na cultura da cana-de-açúcar, no município de salto do Jacuí, RS.
NEW SEISMIC SOURCE ZONE MODEL FOR PORTUGAL AND AZORES
The development of seismogenic source models is one of the first steps in seismic hazard assessment. In seismic hazard terminology, seismic source zones (SSZ) are polygons (or volumes) that delineate areas with homogeneous characteristics of seismicity. The importance of using knowledge on geology, seismicity and tectonics in the definition of source zones has been recognized for a long time [1]. However, the definition of SSZ tends to be subjective and controversial. Using SSZ based on broad geology, by spreading the seismicity clusters throughout the areal extent of a zone, provides a way to account for possible long-term non-stationary seismicity behavior [2,3]. This approach effectively increases seismicity rates in regions with no significant historical or instrumental seismicity, while decreasing seismicity rates in regions that display higher rates of seismicity. In contrast, the use of SSZ based on concentrations of seismicity or spatial smoothing results in stationary behavior [4]. In the FP7 Project SHARE (Seismic Hazard Harmonization in Europe), seismic hazard will be assessed with a logic tree approach that allows for three types of branches for seismicity models: a) smoothed seismicity, b) SSZ, c) SSZ and faults. In this context, a large-scale zonation model for use in the smoothed seismicity branch, and a new consensus SSZ model for Portugal and Azores have been developed. The new models were achieved with the participation of regional experts by combining and adapting existing models and incorporating new regional knowledge of the earthquake potential. The main criteria used for delineating the SSZ include distribution of seismicity, broad geological architecture, crustal characteristics (oceanic versus continental, tectonically active versus stable, etc.), historical catalogue completeness, and the characteristics of active or potentially-active faults. This model will be integrated into an Iberian model of SSZ to be used in the Project SHARE seismic hazard assessment
Automated quantum operations in photonic qutrits
CNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOCAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL E NÍVEL SUPERIORFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOFAPEMIG - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE MINAS GERAISWe report an experimental implementation of automated state transformations on spatial photonic qutrits following the theoretical proposal made by Baldijao et al. [Phys. Rev. A 96, 032329 (2017)]. A qutrit state is simulated by using three Gaussian beams, and after some state operations, the transformed state is available in the end in terms of the basis state. The state transformation setup uses a spatial light modulator and a calcite-based interferometer. The results reveal the usefulness of the operation method. The experimental data show a good agreement with theoretical predictions, opening possibilities for explorations in higher dimensions and in a wide range of applications. This is a necessary step in qualifying spatial photonic qudits as a competitive setup for experimental research in the implementation of quantum algorithms which demand a large number of steps.97216CNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOCAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL E NÍVEL SUPERIORFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOFAPEMIG - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE MINAS GERAISCNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOCAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL E NÍVEL SUPERIORFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOFAPEMIG - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE MINAS GERAISSem informaçãoSem informação2014/27223-22016/24162-8Sem informaçã
Análise das Camadas Retinianas em Doentes com Lesão Isquémica da Artéria Cerebral Posterior Unilateral: um Estudo de Tomografia de Coerência Óptica
Introdução: A degeneração transneuronal retrógrada (DTR) das células ganglionares tem sido implicada na fisiopatologia de lesões na via visual posterior. Apesar de estarem descritas alterações nas camadas mais externas da retina na patologia do nervo óptico, esta relação com lesões a nível occipital permanece desconhecida. O objectivo do presente estudo é a avaliação das camadas nuclear interna (CNi), plexiforme externa (CPe), nuclear externa (CNe) e dos fotoreceptores (CFo) em doentes com lesões isquémicas da artéria cerebral posterior (ACP) com tomografia de coerência óptica (OCT).
Métodos: Estudo transversal observacional, caso-controlo de doentes com hemianópsia homónima
decorrente de lesão unilateral isquémica da ACP seguidos no departamento de Neuroftalmologia
do Centro Hospitalar de Lisboa Central. Todos os doentes realizaram OCT macular em ambos os olhos. Após segmentação automática das diferentes camadas, foram obtidos os valores de espessuras correspondentes às regiões nasal e temporal entre 1 a 3mm (N1-3 e T1-3) e entre 3 e 6 mm (N3-6 e T3-6) centradas na fóvea.
Resultados: Dez doentes com lesão da PCA e um grupo de controlo pareado para o sexo e idade foram incluidos no estudo. Quando comparados ambos os olhos do mesmo doente, verificou-se um aumento da espessura da CNi em N3-6 (p=0,005) do olho contralateral e em T3-6 (p=0,011) no olho ipsilateral, assim como da CPe em N3-6 (p=0,034) do olho contralateral. Não se verificaram diferenças estatisticamente significativas no grupo controle.
Conclusão: Além da já documentada associação entre lesões isquémicas occipitais e as alterações nas camadas internas da retina, podemos ainda observar algumas alterações nas camadas retinianas mais externas. É possível que a DTR no sistema visual seja um processo que não se esgota nas células ganglionares, afectando camadas mais externas da retina.info:eu-repo/semantics/publishedVersio
Avaliação da composição centesimal e dos teores de isoflavonas de cultivares de soja (Glycine max (L.) Merrill) especiais para alimentação humana.
With a little help from DNA barcoding: investigating the diversity of Gastropoda from the Portuguese coast
The Gastropoda is one of the best studied classes of marine invertebrates. Yet, most species have been delimited based on morphology only. The application of DNA barcodes has shown to be greatly useful to help delimiting species. Therefore, sequences of the cytochrome c oxidase I gene from 108 specimens of 34 morpho-species were used to investigate the molecular diversity within the gastropods from the Portuguese coast. To the above dataset, we added available COI-5P sequences of taxonomically close species, in a total of 58 morpho-species examined. There was a good match between ours and sequences from independent studies, in public repositories. We found 32 concordant (91.4%) out of the 35 Barcode Index Numbers (BINs) generated from our sequences. The application of a ranking system to the barcodes yield over 70% with top taxonomic congruence, while 14.2% of the species barcodes had insufficient data. In the majority of the cases, there was a good concordance between morphological identification and DNA barcodes. Nonetheless, the discordance between morphological and molecular data is a reminder that even the comparatively well-known European marine gastropods can benefit from being probed using the DNA barcode approach. Discordant cases should be reviewed with more integrative studies.The present study was financed by FEDER through POFC-COMPETE, in the scope the project FCOMP-01-0124-FEDER-015429 funded by "Fundacao para a Ciencia e a Tecnologia" (FCT), Portugal. Work at CBMA was supported by FCT I.P. through the strategic funding UID/BIA/04050/2013. Sequencing at the Biodiversity Institute of Ontario was funded by the International Barcode of Life (iBOL), through the Canadian Centre for DNA Barcoding, from the Ontario Genomics Institute, Genome Canada, the Ontario Ministry of Research and Innovation, and the Natural Sciences and Engineering Research Council of Canada. Claudia Hollatz was supported by a CAPES Post-doctoral fellowship (Ministry of Education, Brazil), while Jorge Lobo was supported by a PhD fellowship (SFRH/BD/69750/2010) from FCT.info:eu-repo/semantics/publishedVersio
With a little help from DNA barcoding: investigating the diversity of Gastropoda from the Portuguese coast
The Gastropoda is one of the best studied classes of marine invertebrates. Yet, most species have been delimited based on morphology only. The application of DNA barcodes has shown to be greatly useful to help delimiting species. Therefore, sequences of the cytochrome c oxidase I gene from 108 specimens of 34 morpho-species were used to investigate the molecular diversity within the gastropods from the Portuguese coast. To the above dataset, we added available COI-5P sequences of taxonomically close species, in a total of 58 morpho-species examined. There was a good match between ours and sequences from independent studies, in public repositories. We found 32 concordant (91.4%) out of the 35 Barcode Index Numbers (BINs) generated from our sequences. The application of a ranking system to the barcodes yield over 70% with top taxonomic congruence, while 14.2% of the species barcodes had insufficient data. In the majority of the cases, there was a good concordance between morphological identification and DNA barcodes. Nonetheless, the discordance between morphological and molecular data is a reminder that even the comparatively well-known European marine gastropods can benefit from being probed using the DNA barcode approach. Discordant cases should be reviewed with more integrative studies.The present study was financed by FEDER through POFC-COMPETE, in the scope the project FCOMP-01-0124-FEDER-015429 funded by "Fundacao para a Ciencia e a Tecnologia" (FCT), Portugal. Work at CBMA was supported by FCT I.P. through the strategic funding UID/BIA/04050/2013. Sequencing at the Biodiversity Institute of Ontario was funded by the International Barcode of Life (iBOL), through the Canadian Centre for DNA Barcoding, from the Ontario Genomics Institute, Genome Canada, the Ontario Ministry of Research and Innovation, and the Natural Sciences and Engineering Research Council of Canada. Claudia Hollatz was supported by a CAPES Post-doctoral fellowship (Ministry of Education, Brazil), while Jorge Lobo was supported by a PhD fellowship (SFRH/BD/69750/2010) from FCT.info:eu-repo/semantics/publishedVersio
Functional behaviour of TiO2films doped with noble metals
To evaluate the effects of different concentrations of noble metal in a TiO2 matrix, different films
of both Ag:TiO2 and Au:TiO2 systems were prepared. Mechanical and tribological
characterization was carried out to evaluate the coatings response as a function of the noble metals
composition and (micro)structure of the films. The overall set of results indicates that the
amorphous films reveal better results than the crystalline ones. For the amorphous samples, the reduced Young’s modulus and the adhesion critical loads followed similar tendencies in both sets
of films. Wear rates were similar for all samples except for the one with the highest silver content.
To improve brittleness of TiO2 films, the results seem to indicate that a slight metal doping is
preferred, and Au showed to be a better choice than Ag. In fact, the sample with the lowest Au
content revealed a better mechanical behaviour than the pure TiO2 film.This research was sponsored by FEDER funds through the COMPETE program (Programa
Operacional Factores de Competitividade) and by FCT (Fundação para a Ciência e a Tecnologia),
under the projects PEST-C/FIS/UI607/2013 and PEst-C/EME/UI0285/2013. The authors also
acknowledge the financial support by the project Nano4color – Design and develop a new
generation of color PVD coatings for decorative applications (FP7 EC R4SME Project No.
315286)
Avaliação de estratégias de produção em agricultura irrigada no perímetro de irrigação do Gorutuba.
Apresenta-se aqui o relatório de projeto de pesquisa, parcialmente financiado pelo Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq, que teve como objetivo gerar uma base de informações para dar suporte a decisões relativas ao manejo da irrigação e ao planejamento para o perímetro de irrigação do Gorutuba. O relatório compreende o período de 10 de agosto de 2005 a 10 de agosto de 2007. Informações técnicas e econômicas de cinco culturas perenes e quinze anuais foram levantadas na literatura internacional, nacional e local e em relatórios do distrito de irrigação Gorutuba e da Codevasf. Séries históricas de dados de clima foram obtidas na Embrapa Milho e Sorgo. Amostras de solo foram coletadas em quatro propriedades representativas de pequeno e grande produtor e as análises físicas e químicas realizadas nos laboratórios da Embrapa. Os coeficientes técnicos dos custos de produção foram obtidos junto ao distrito de irrigação Jaíba, sendo considerados similares aos verificados no perímetro Gorutuba. Consideraram-se valores médios para os custos dos fatores de produção para o Norte de Minas Gerais, atualizados para dezembro de 2006. Consideraram-se os custos de água de irrigação praticados no perímetro e os preços de venda dos produtos foram ajustados com base em uma série histórica, corrigida pelo IPCA, obtida junto aos distritos de irrigação, Emater-MG e Codevasf e preços recebidos no Ceasa-MG, em diferentes épocas do ano. Os requerimentos totais de irrigação (RIT) e as produtividades relativas totais (YRT) foram obtidos mediante simulações com o modelo MCID. Posteriormente, essas informações foram empregadas nos estudos de otimização de padrão de cultivo, associados à análise de risco, na definição de coeficientes técnicos relativos à função objetivo e na definição de restrições no modelo de programação linear. Visando demonstrar a aplicação das ferramentas de otimização de padrão de cultivo e de requerimento de água, foram construídos dois modelos de programação linear (MPL), sendo que a cada um destes MPL ?s foi associada uma análise de risco. Para proceder as análises de risco empregou-se o programa P-Risco, no qual algumas variáveis de entrada e de saída são estocásticas, tendo a elas associada uma distribuição de probabilidade. Duas propriedades, uma de 200 ha e outra de 11 ha, foram utilizadas como estudos de caso, com base em cenários de produção hipotéticos. As análises demonstraram a capacidade das ferramentas propostas para o planejamento e para o auxílio à tomada de decisões em propriedades de perímetros irrigados.bitstream/item/61027/1/doc-73.pd
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