Non Ideal Systems
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. Analysis of NH3-N Slow Release systems for fiber digestibility of low-quality forage: in vitro approach
ABSTRACT: Urea is a common non-protein supplement used in ruminant feed; however, excessive consumption may lead to poisoning by NH3. Although the slow release of urea into the rumen has shown to be an essential aspect for ruminant feed, to date only a few studies have addressed this matter. In this study we examined the influence of five different NH3-N slo
Sci. agric. (Piracicaba, Braz.). Publicado em: 20/12/2019
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2. Optical cryptography through analog control of amplitude and delay of spectral slices: anlysis for NRZ and DQPSK signals. / Criptografia Ãptica mediante controle analÃgico da amplitude e do atraso de fatias espectrais: anÃlise para sinais NRZ e DQPSK.
This work investigates a technique to encrypt the optical signal for Transparent Optical Network, TON, in order to safeguard the confidentiality and guarantee the security of informations that are transmitted through the Telecommunications Network. The technique is assessed on the physical layer of the reference model for open systems interconnection, OSI, a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/11/2012
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3. Aplicação do método da minimização da energia de Gibbs no cálculo de equilíbrio químico e de fases em sistemas eletrolíticos / Application method of the Gibbs energy minimization to calculation of phase and chemical equilibrium in electrolyte systems
In several industrial applications are used mixtures containing different solutes, often these solutes are non-volatile, such as electrolytes. The phase and chemical equilibrium in these processes occur in the various unit operations. The stages of production, as well as the separation and purification steps are critical to product quality. Thus, the calcula
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/12/2011
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4. Simulações Monte Carlo de integrais de trajetória : propriedades elásticas do 4He sólido / Path integrals Monte Carlo simulations : elastic properties of 4He
The path-integral Monte Carlo (PIMC) method is a sophisticated approach for the simulation of many-body quantum systems. In particular, it has been extensively used for the study of manybody bosonic systems such as 4He. The main objective of the present dissertation is to apply the PIMC method to determine the elastic constants of solid 4He in its hcp phase.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/11/2010
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5. Environmentally responsive polymeric "intelligent" materials: the ideal components of non-mechanical valves that control flow in microfluidic systems
Miniaturization and commercialization of integrated microfluidic systems has had great success with the development of a wide variety of techniques in microfabrication, since they allowed their construction at a low cost and by following simple step-series procedures. However, one of the major challenges in the design of microfluidic systems is to achieve co
Brazilian Journal of Chemical Engineering. Publicado em: 2010-03
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6. Compared education and anthropology: educational borrowing at international schools in Brazil. / Educação comparada e antropologia: "educational borrowing" em escolas internacionais no Brasil
At international schools in São Paulo, international and transnational curricula and methodology are utilized. In mathematics, these schools teach, for instance, an algorithm for division that is not normally adopted in the Brazilian educational system. Since the majority of the students of these schools are Brazilian, this is identified as educational borr
Publicado em: 2010
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7. Dynamic analysis of a cantilever beam excited by a non ideal source / Análise dinâmica de uma viga engastada excitada por uma fonte não ideal
Studies about the dynamic behaviour of nonlinear structures have been to this date subject of extensive research all around the world. Since the beginning of the development of the nonlinear oscillation theory one has tried to understand the basic mechanisms, like disruptions that would cause complex answers on flexible structures. This paper presents a theo
Publicado em: 2009
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8. Avaliação de controle neural a um processo de quatro tanques acoplados
The main goal of this doctorate thesis is the evaluation of neural control on a four interconnected tanks process, in laboratory environment, where the controlled variable is the water level height of the fourth tank. The dynamics of this process is non linear, as the outflow from the tanks depends on the square root of corresponding water height. This type
Publicado em: 2009
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9. Uma investigação sobre a aplicabilidade da teoria de sistemas não-ideais a fundações de máquinas reais. / An investigation on the applicability of the non-ideal systems theory to real machine foundations.
The main objective of the present project is to verify the interaction between the foundation structure of a machine - an industrial fan - with the excitation source, its own motor, in this case to identify possible occurrence of the so called "jump phenomenon", also known as Sommerfeld Effect. Such phenomenon is derived from the dynamic coupling between the
Publicado em: 2008
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10. Predição do equilibrio liquido-vapor atraves de redes neurais artificiais / Prediction of vapor-liquid equilibrium using artificial neural networks
: Esse trabalho tem como objetivo o estudo da viabilidade de se utilizar se redes neurais artificiais (RNAs) para a predição de equilíbrio líquido-vapor (EL V), utilizando a abordagem do método de contribuição de grupos, método UNIF AC. Foram feitas duas propostas de trabalho, uma substituindo o método UNIF AC para o cálculo do coeficiente de ativi
Publicado em: 2008
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11. Efeito do fluor de um sistema adesivo na resistencia de união e no desafio acido em dentina / Effect of fluoride containing adhesive system on microtensile bond strength and acid challenge on dentin
Despite of the advance in adhesive dentistry, it is not possible to achieve an ideal bonding between composite resin and dental substrate. Currently, a variety of adhesive systems have been used. However, any adhesive system is capable to hamper the marginal leakage, degradation, and secondary caries formation at dentin-resin interfaces in long-term. For tha
Publicado em: 2007
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12. Análise e Síntese de um Algoritmo Phase-Locked-Loop Robusto para Estimação de Amplitude, Fase e Freqüência de Sinais Elétricos
The always more restrictive energy quality benchmarks, pushed on by consumers, associated with the electric sector deregulamentation has been imposing the necessity, for the concessionaries, of a better and decentralized monitoring of energy electric quality. At the same time, the increase of nonlinear loads connected to the electric network, among other fac
Publicado em: 2007