11 resultados para ADMA

em Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho"


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Perylene tetracarboxylic derivatives (PTCDs) display exceptionally high two-photon absorption (2PA) cross-sections (6, see Figure). In addition, the 2PA saturation behavior and strong two-photon-pumped fluorescence suggest that PTCD compounds may be attractive candidates for applications in optical limiting and two-photon-pumped upconversion lasing.

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A thermally activated photoluminescence memory effect, induced by a reversible order-disorder phase transition of the alkyl chains, is reported for highly organized bilayer alkyl/siloxane hybrids (see figure; left at room temperature, right at 120 degrees C). The emission energy is sensitive to the annihilation/formation of the hydrogen-bonded amide-amide array displaying a unique nanoscopic sensitivity (ca. 150 nm).

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

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A contribuição de engenheiros precursores para a ergonomia foi fator determinante na melhora e desempenho do homem no trabalho, dentre eles podemos citar Leonardo da vinci, Bélidor, Vaucanson, Taylor e o casal Gilbreth. O artigo relata a contribuição significativa desses engenheiros para a construção da ergonomia.

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This cross-sectional study aimed to evaluate the load carried by students in primary and secondary schools, state Vespasian /MG, and quantify the percentage established between backpack weight and body mass of these young people carry every day. The study included 916 students of both genders. Ages ranged from 10-19 years. 541 students (59.06%) carried the load backpack ranging from 10.02 to 33.43% of his body mass. Students with younger age, female students and those who opted for the backpack model designed dorsal attachment tended to carry a load higher than 10% of his body weight. 224 (24.45%) students complain of back pain and shoulder. It was concluded that the cargo is inadequate from the point of view of biomechanics and ergonomics, especially for younger individuals and females, since they are in growth phase, and this exposes them to an overhead increased risk of spinal injuries, with consequent repercussions in adulthood.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)