2,142 research outputs found

    Preliminary analysis of development programs performance

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    The regional development programs promoted by the national governments and international multilateral agencies, like the World Bank and the Inter American Development Bank, are oriented to public policies under which public goods, like public services and infrastructures, are supplied to underdeveloped regions, many in Latin America. More a more evidences are pointing to the fact that success of these programs depends in a good part of externalities, which are related to the changes in the form of networking and values among the stakeholders in the territory. These externalities are defined as the Social Capita

    AVALIAÇÃO NUTRITIVA DE FENOS DA PASTAGEM NATURAL DO PARANÁ

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    Fenos de pastagem natural do Paraná colhidos durante o verão nos municípios de Ponta Grossa, Guarapuava e Tibagi, foram avaliados pela composição química, determinação dos coeficientes de digestibilidade e consumo voluntário com ovinos. Baseados na composição química, os valores encontrados foram semelhantes para os três fenos estudados. No entanto, o feno de Guarapuava apresentou valores mais elevados em FDN e lignina. Entre os coeficientes de digestibilidade, somente o da proteína bruta e do FDN não apresentaram diferença significativa entre os locais (P>0,05). Para a digestibilidade da matéria seca e energia bruta, o feno de Ponta Grossa mostrou-se superior ao de Tibagi. No consumo de matéria seca, proteína e energia digestíveis, não houve diferença significativa (P>0,05) entre locais, mas em relação a energia líquida de manutenção o feno de Ponta Grossa diferiu significativamente do feno de Tibagi (P0.05). As far as digestibility of the dry matter and gross energy are concerned, the hay of Ponta Grossa showed superior qualities when compared with the Tibagi one. No significant differences (P>0.05) were found between all the hays studied. However, in regard to liquid maintenance energy, the Ponta Grossa hay differed significantly from the Tibagi hay (

    Evaluación de modelos de crecimiento en difrerentes condiciones de cultivo de pejerrey (Odontesthes bonariensis)

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    Fil: Solimano, Patricio José. Universidad Nacional de Río Negro. Escuela de producción, tecnología y medio ambiente; ArgentinaFil: Garcia de Souza, Javier Ricardo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología Dr. Raúl A. Ringuelet; ArgentinaFil: Maiztegui, Tomás. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología Dr. Raúl A. Ringuelet; ArgentinaFil: Bazzani, J.L.. Universidad Nacional de Río Negro. Escuela de producción, tecnología y medio ambiente; ArgentinaFil: Baigún, Claudio Rafael Mariano. Universidad Nacional de San Martín. Instituto Tecnológico de Chascomús. Instituto de Investigaciones Biotecnológicas; ArgentinaFil: Colautti, Darío César. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología Dr. Raúl A. Ringuelet; Argentin

    An architecture for message exchange in pervasive healthcare based on the use of intelligent agents

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    Aims: This paper proposes an architecture for the exchange of context-aware messages in Pervasive Healthcare environments.\ud \ud Materials and methods: In Pervasive Healthcare, novel information and communication technologies are applied to support the provision of health services anywhere, at anytime, and to anyone. Ubiquitous Computing technologies allow efficient and safe information exchange amongst caregivers and their patients in communities, homes and hospitals. Since health systems may offer their health records in various electronic formats, the openEHR foundation has proposed a dual model to achieve semantic interoperability between such systems. Intelligent Agents is a technology that has been applied to simulate human skills in healthcare procedures. This architecture is based on technologies from Ubiquitous Computing and Intelligent Agents, and complies with the openEHR dual model.\ud \ud Results: This architecture was demonstrated and evaluated in a controlled experiment that we conducted in the cardiology department of a hospital located in the city of Marília (São Paulo, Brazil).\ud \ud Conclusion: An application was developed to evaluate this architecture, and the results showed that the architecture is suitable for facilitating the development of healthcare systems by offering generic resources and powerful solution to integrate these systems

    ESTUDOS DE CARACTERÍSTICAS REPRODUTIVAS DE ANIMAIS DA RAÇA CANCHIM, CRIADOS A PASTO, NO ESTADO DO PARANÁ, BRASIL

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    Beef production efficiency depends heavely on reproductive performance. Information on age at first calving indicates sexual precocity. Good management of young animal and elimination of factors that negatively interfere with growth and development of heifers contribute to shorten age at first calving. This trait, together with calving interval and conception rate of heifers after their first calving were studied from records of 3.091 Canchim females, born from 1974 through 1998, at Estação Experimental Fazenda Modelo/IAPAR, Ponta Grossa-PR. Data were analyzed using SAS program. Average calving interval, computed using least squares methods, was 16.79 ± 0.43 months, with coefficient of variation equal to 32.07. The R square from the statistical model was 19.84%. For calving interval, only year of birth, month of birth and month of previous calving were significant. When interval between first and second calving was studied, month of previous calving was not significant. Considering that data came from controlled animals, the average calving interval was too long in contrast with the ideal (12 months). Improving management practices should result in shorter calving interval in this herd.A produção eficiente de gado de corte depende muito do seu desempenho reprodutivo. Informações sobre a idade ao primeiro parto evidenciam a precocidade do animal. A boa criação dos animais jovens e a eliminação de fatores que interferem negativamente no crescimento e desenvolvimento das novilhas contribuem para diminuir a idade ao primeiro parto.  Essa característica, juntamente com o intervalo de partos e a taxa de reconcepção de novilhas Canchim foram estimadas analisando-se registros pertencentes ao banco de dados do Instituto Agronômico do Paraná (IAPAR), totalizando 3.091 partos, ocorridos no período de 1974 a 1998. Esses dados foram analisados utilizando o programa SAS, para se processar as respectivas análises estatísticas. A média para o intervalo de partos geral, estimada pelo método dos quadrados mínimos, foi de 16,79 ± 0,43 meses. O modelo estatístico justificou 19,84%, com um coeficiente de variação de 32,07. Das fontes de variação do modelo, apenas mês, ano e mês do parto anterior foram significativos para o intervalo de partos (geral). Quando se estudou essa característica entre o primeiro e segundo parto, o mês do parto anterior não foi significativo, apenas mês e ano de parto o foram. Considerando que os dados são provenientes de animais controlados, constatou-se médias elevadas em relação ao ideal (12 meses). A implementação de melhorias no manejo para esses animais pode reduzir os valores de intervalo entre partos na propriedade

    Subtelomeric I-scei-mediated Double-strand Breaks Are Repaired By Homologous Recombination In Trypanosoma Cruzi

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    Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Trypanosoma cruzi chromosome ends are enriched in surface protein genes and pseudogenes (e.g., trans-sialidases) surrounded by repetitive sequences. It has been proposed that the extensive sequence variability among members of these protein families could play a role in parasite infectivity and evasion of host immune response. In previous reports we showed evidence suggesting that sequences located in these regions are subjected to recombination. To support this hypothesis we introduced a double-strand break (DSB) at a specific target site in a T. cruzi subtelomeric region cloned into an artificial chromosome (pTAC). This construct was used to transfect T. cruzi epimastigotes expressing the I-SceI meganuclease. Examination of the repaired sequences showed that DNA repair occurred only through homologous recombination (HR) with endogenous subtelomeric sequences. Our findings suggest that DSBs in subtelomeric repetitive sequences followed by HR between them may contribute to increased variability in T. cruzi multigene families. © 2016 Chiurillo, Moraes Barros, Souza, Marini, Antonio, Cortez, Curto, Lorenzi, Schijman, Ramirez and da Silveira.7DEC11/51475-3, FAPESP, Fundação de Amparo à Pesquisa do Estado de São Paulo11/51693-0, FAPESP, Fundação de Amparo à Pesquisa do Estado de São Paulo306591/2015-4, CNPq, Conselho Nacional de Desenvolvimento Científico e TecnológicoFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq

    Emissioin of Intermediate Mass Fragments During Fission

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    This research was sponsored by the National Science Foundation Grant NSF PHY-931478

    Transfer-matrix scaling from disorder-averaged correlation lengths for diluted Ising systems

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    A transfer matrix scaling technique is developed for randomly diluted systems, and applied to the site-diluted Ising model on a square lattice in two dimensions. For each allowed disorder configuration between two adjacent columns, the contribution of the respective transfer matrix to the decay of correlations is considered only as far as the ratio of its two largest eigenvalues, allowing an economical calculation of a configuration-averaged correlation length. Standard phenomenological-renormalisation procedures are then used to analyse aspects of the phase boundary which are difficult to assess accurately by alternative methods. For magnetic site concentration pp close to pcp_c, the extent of exponential behaviour of the Tc×pT_c \times p curve is clearly seen for over two decades of variation of ppcp - p_c. Close to the pure-system limit, the exactly-known reduced slope is reproduced to a very good approximation, though with non-monotonic convergence. The averaged correlation lengths are inserted into the exponent-amplitude relationship predicted by conformal invariance to hold at criticality. The resulting exponent η\eta remains near the pure value (1/4) for all intermediate concentrations until it crosses over to the percolation value at the threshold.Comment: RevTeX 3, 11 pages +5 figures, uuencoded, to appear in Phys. Rev. B (1994), PUC/RJ preprin
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