262 resultados para validação de equações


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Indiscriminate and inappropriate use of pesticides in agriculture has been pointed out for increasing health problems and environmental damage. Considering that water resources are the principal destiny of those compounds after application, the present study presents optimization and validation of two simple and effi cient analytical methods for pesticides quantifi cation in both surface and groundwater. Were selected the pesticides more commonly used at Dourados (MS - Brazil), region with intense agricultural activity. Pesticides were preconcentrated by solid-phase extraction using C18 (500 mg) cartridges and then divided in two groups for elution and quantifi cation: 2.4-D and 2.4-DCP were eluted with methanol and quantifi ed by high performance liquid chromatography with ultra-violet detector (HPLC-UV) while atrazine, DIA, DEA, trifl uralin and methyl parathion were eluted with ethylacetate (1:1, v/v) and quantifi ed by gas chromatography with thermionic specifi c detector (GC-TSD). The methods showed satisfactory accuracy (76-107%) and precision (<12%) for the substances analyzed at the fortifi ed levels selected for the study, except for DIA (<51%). Study of pesticide stability also presented good results: C18 cartridges could be stored for at least for 21 days at -20ºC with no signs of the compounds degradability. Both methods limits of quantifi cation of the pesticides (0.22 - 0.48 μg L-1) are in accordance to the levels currently established by the Brazilian national legislation for pesticides in water. Although only the pesticide 2.4-D has been detected in two distinct collection points in the study period of time, this work warns for the requirement of systematical analysis of pesticides presence in water destined to human consume, principally in areas of intense agriculture activity. Such monitoring can provide subsidies for public environmental policies.

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Pós-graduação em Microbiologia Agropecuária - FCAV

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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The objective of this study was to develop a model that allows testing in the wind tunnel at high angles of attack and validates its most critical components by analyzing the results of simulations in finite element software. During the project this structure suffered major loads identified during the flight conditions and, from these, we calculated the stresses in critical regions defined as the parts of the model that have higher failure probabilities. All aspects associated with Load methods, mesh refining and stress analysis were taken into account in this approach. The selection of the analysis software was based on project needs, seeking greater ease of modeling and simulation. We opted for the software ANSYS® since the entire project is being developed in CAD platforms enabling a friendly integration between software's modeling and analysis

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The purpose of this work was the study of numerical methods for differential equations of fractional order and ordinary. These methods were applied to the problem of calculating the distribution of the concentration of a given substance over time in a given physical system. The two compartment model was used for representation of this system. Comparison between numerical solutions obtained were performed and, in particular, also compared with the analytical solution of this problem. Finally, estimates for the error between the solutions were calculated

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O presente trabalho foi realizado nas dependências da FURP (Fundação para o Remédio Popular) de Américo Brasiliense - SP, com o objetivo de validar o método de determinação para residual de detergente alcalino nos equipamentos de revestimento de comprimidos. O trabalho foi desenvolvido no laboratório do Controle de Qualidade da FURP. A validação de limpeza é um tema pouco visto durante o curso de graduação em Farmácia - Bioquímica, porém bastante importante dentro da Indústria Farmacêutica. O processo de limpeza dos equipamentos utilizados na indústria farmacêutica deve ser validado para garantir a qualidade dos produtos. Determinar o residual de um produto de limpeza em um equipamento assegura que o agente de limpeza usado no processo, no caso o detergente alcalino, esteja em uma quantidade dentro do limite aceitável após a limpeza do equipamento. Primeiramente, validou-se o método analítico utilizado para determinar a quantidade de resíduo através da condutividade. Foram analisados os parâmetros linearidade, precisão e especificidade, que se encontraram dentro do limite permitido. Também foi realizado o estudo de recuperação (recovery) do resíduo de detergente do equipamento para confirmar a eficácia da técnica de amostragem juntamente com o método analítico quantitativo escolhido. Após a validação da metodologia analítica quantitativa e o estudo de recuperação foi possível definir um procedimento adequado para a análise do residual de detergente alcalino nos equipamentos submetidos ao processo de limpeza. Juntamente com o setor de Garantia da Qualidade, também foi realizado o estudo de validação da limpeza dos equipamentos da linha de sólidos da FURP (unidade Américo Brasiliense), neste estudo foi avaliado se o procedimento de limpeza estava sendo eficiente e também foi possível fazer a determinação de residual de detergente alcalino presente no equipamento após amostragem com swab, ...

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Pós-graduação em Engenharia Mecânica - FEG

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This article aims to describe the proposed development of an emulator application for digital TV that operates on a local computer network, to have it as a testing environment for students and researchers. The emulator application is presented as a useful tool to reduce validation costs of applications developed for digital TV.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Fonoaudiologia - FFC

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Post-Occupancy Evaluation of buildings considers user satisfaction, building pathologies and performance, as well as users interventions in the built environment. The possibility of identifying interventions regardless of the user could provide a significant gain in the efficiency of Post-Occupancy Evaluations. We foresee the application of Augmented Reality (AR) to improve the identification of renovations by overlapping the construction information model with an image of the actual building. This article validates the use of AR on existing smartphone and tablet applications. This study proposes the incorporation of AR into the planning, execution and application of Post-Occupancy Evaluation. For the planning, this study proposes the development of a new research tool. With regards to the execution, this study examined the data collection conditions on site through the visualization of overlapping models. For the application, this study proposes displaying the results through the use of RA information layers. The transparency oft he RA model was used to allow comparison between the virtual model and the real model. The development and adaptation of the virtual model and the solution developed for the experiment of the RA proposal are presented and discussed. The experiment points to shortcomings that still make the proposed technological solution unfeasible.