66 resultados para Time-varying covariance matrices


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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Inclusive education is seen as quality education that should be provided by the educational system for all children, young people and adults. In order to put such a proposal into effect, qualified personnel are needed who are equipped to face such a challenge. This paper aims to examine the curriculum matrices of Pedagogy courses of the Universidade Estadual Paulista - UNESP that intend to prepare future teachers to follow an inclusive perspective. To this end, the political-pedagogical projects of six Pedagogy courses, the University resolutions that regulate the courses and excerpts taken from interviews carried out with course coordinators were analyzed. In order to analyze the curriculum matrices, the required subjects were distributed on a table according to the following categories: 1) specific subjects related to inclusive education, 2) number of hours of each subject related to inclusive education, 3) specific subjects related to special education and 4) amount of time scheduled for each subject related to special education. Among the six Pedagogy courses, five had subjects that focused on issues related to inclusive education, with varying time allotments, and four had subjects focusing on specific issues related to special education.

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

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Turmeric (Curcuma longa L.), which has been used for long time as a spice, food preservative and coloring agent, is a rich source of beneficial phenolic compounds identified as curcuminoids. These phenolic compounds are known for their antioxidant, anti-inflammatory and antimutagenic properties, among others. On the other hand, they are very susceptible to oxidation, requiring protection against oxygen, light and heat. This protection can be achieved by microencapsulation. In this work, the characteristics and the stability of turmeric oleoresin encapsulated by freeze-drying using mixtures of maltodextrin and gelatin as wall materials were studied. Encapsulated turmeric oleoresin was stored at –20, 25 and 60 °C, in the absence of light, and analyzed over a period of 35 days for curcumin and total phenolic contents and color. Results showed that the samples produced with 26% maltodextrin/0.6% gelatin and 22% maltodextrin/3% gelatin presented good encapsulation efficiencies and solubility. In general, the method of encapsulation employed originated products with satisfactory thermal stability, although the encapsulated materials with a higher proportion of maltodextrin in relation to gelatin had better stabilities, especially at –20 and 25 °C temperatures.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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A method for the identification and quantification of pesticide residues in water, soil, and sediment samples has been developed, validated, and applied for the analysis of real samples. The specificity was determined by the retention time and the confirmation and quantification of analyte ions. Linearity was demonstrated over the concentration range of 20 to 120 µg L(-1), and the correlation coefficients varied between 0.979 and 0.996, depending on the analytes. The recovery rates for all analytes in the studied matrix were between 86% and 112%. The intermediate precision and repeatability were determined at three concentration levels (40, 80, and 120 µg L(-1)), with the relative standard deviation for the intermediate precision between 1% and 5.3% and the repeatability varying between 2% and 13.4% for individual analytes. The limits of detection and quantification for fipronil, fipronil sulfide, fipronil-sulfone, and fipronil-desulfinyl were 6.2, 3.0, 6.6, and 4.0 ng L(-1) and 20.4, 9.0, 21.6, and 13.0 ng L(-1), respectively. The method developed was used in water, soil, and sediment samples containing 2.1 mg L(-1) and 1.2% and 5.3% of carbon, respectively. The recovery of pesticides in the environmental matrices varied from 88.26 to 109.63% for the lowest fortification level (40 and 100 µg kg(-1)), from 91.17 to 110.18% for the intermediate level (80 and 200 µg kg(-1)), and from 89.09 to 109.82% for the highest fortification level (120 and 300 µg kg(-1)). The relative standard deviation for the recovery of pesticides was under 15%.