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Efeito do uso de óleo na dieta sobre a lipogênese e o perfil lipídico de tilápi...

Trinta e cinco machos de tilápia com peso médio de 205 g foram mantidos em caixas de 250 litros para avaliar o metabolismo lipídico de tilápias-do-nilo (Oreochromis niloticus). O experimento foi conduzido durante 30 dias, entre os meses de outubro e novembro de 2006. Foram avaliadas cinco dietas, cada uma contendo óleo de oliva, óleo de milho, óleo de soja, óleo de linhaça ou óleo de peixe. Utilizou-se delineam...

Delusion: an epistemological analysis of the application of its jasperian conce...

O delírio, fenômeno central da psicopatologia, é ainda atualmente definido por meio de características legadas do século XIX e difundidas por Karl Jaspers (a convicção com que é sustentado, sua incorrigibilidade e falsidade), auxiliadas por algumas outras características enunciadas por ele próprio (sua incompreensibilidade, primariedade e a modificação da personalidade). Nem o conceito jasperiano de delírio nem...

Devir deserto no São Jerônimo de Júlio Bressane

Visamos mapear um conjunto de relações culturais e literárias que Júlio Bressane extrai ao sobrepor deserto (medieval) e sertão nordestino, no filme São Jerônimo. A imagem atua para recriar o signo dessa grande figura de intelectual e tradutor, realizando uma combinatória entre elementos de sistemas de signos e textos culturais diferentes. O cineasta discute tradução intersemiótica (transcriação), num sentido p...

SPICE implementation of a finite element method based model for bipolar power s...

This paper describes the methodology associated with the practical implementation, in SPICE circuit simulator, of a Finite Element Method (FEM) based model developed for Bipolar Power Semiconductor (BPS) simulation. The methodology is based on a modular approach that associates each zone of the semiconductor to a subcircuit implemented into SPICE simulator. Modeling a semiconductor is based in the union of the ...

Current source inverter for a 400 kW ocean waves induction generator

Electrical energy generated from the ocean waves is a renewable energy being developed. One form of retrieving this energy is using the Oscillating Water Column (OWC) principle. In order to optimise this energetic resource, the electric generator must work at variable speed depending on the input power. For the energy to be delivered to mains, the voltage magnitude and frequency must be constant. This paper des...

A method for bipolar semiconductor device modeling implementable in circuit sim...

This paper presents a method for modeling power semiconductor devices based on the unidimensional solution of the diffusion equation describing the behavior of charge in low doped zones. The method uses a variational approach, and the finite elements method, which allows to transform a partial differential equation in space and time into a finite set of differential equations in time only. As the used functiona...

A modular approach for modelling and simulation of semiconductor power devices

This paper presents a modular approach for the modeling and simulation of power semiconductor devices. The novelty of the method is the accurate description of the carrier distribution in the low doped zone using a modular circuit network. This is achieved through the variational reformulation of the ambipolar diffusion equation (ADE) with posterior approximate solution with a finite element approach. The obtai...

Power p-i-n diode modeling using SPICE

A physics based model for the power p-i-n diode is implemented into the general circuit simulation package SPICE. This model, based on a variational formulation and finite element solution of the semiconductor equations, accurately describes the forward and reverse recovery, as well as, the conduction behavior. The procedure used to implement the resulting model into SPICE is described. The simu...

A New Method for Solving the Ambipolar Diffusion Equation (ADE) Based on a Fini...

This paper presents a new method for simulation of power bipolar devices. The method is based on the solution of the Ambipolar Diffusion Equation (ADE) with a finite element (FE) approach. This one allows analog solutions for ADE through an equivalent electrical network. So the method could constitute the core for power bipolar devices simulation into any electrical circuit simulator. ; This pa...

Integration of Manufacturing Applications - Overcoming Heterogeneity to Preserv...