Sistemas adesivos convencional e autocondicionante: análise micromecânica tridimensional da interface dentina-adesivo

Pós-graduação em Odontologia - FOA

Efeitos dos ascorbato de sódio e alfatocoferol na resistência à fratura, resistência de união e na interface adesiva na dentina de dentes tratados endodonticamente submetidos a clareamento dental com peróxido de hidrogênio

Pós-graduação em Ciências Odontológicas - FOAR

Desenvolvimento de um aplicativo Android e de uma interface bluetooth para um dinamômetro biomédico

Pós-graduação em Engenharia Elétrica - FEIS

Avaliação do tipo de carregamento, pela análise de elementos finitos, sobre a resistência de união ao cisalhamento da interface metal/porcelana (Ni-Cr/vita omega 900)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estrutura do esmalte humano e sua interface com sistemas adesivos

Esta tese sistematiza uma série de estudos dedicados à compreensão da interface do esmalte e sistemas adesivos. Para tanto, a estrutura da camada aprismática do esmalte em alta resolução pela microscopia eletrônica de varredura foi avaliada quanto a sua continuidade, espessura, distribuição nas faces coronárias e em fossas e fissuras, predominantemente em dentes decíduos não erupcionados. Foi também analisado pela microscopia eletrônica de varredura os efeitos do condicionamento de diferentes tipos de ácido e, em especial, do ácido fosfórico em diferentes concentrações, metodologias e tempos de aplicação. Estes trabalhos permitiram visualizar as principais ações ácidas desmineralizantes e os tipos de retenções no centro ou periferias dos prismas ou em ambas as regiões, bem como a profundidade e forma dos “tags” resinosos com carga e sem carga na intimidade do esmalte. No caso particular da aplicação dos selantes em fossas e fissuras foi também avaliada comparativamente a eficácia das técnicas invasivas ou não invasivas. Os últimos experimentos foram dedicados ao estudo da microinfiltração de diferentes sistemas adesivos e da resistência destes sistemas adesivos na estrutura do esmalte. Novos estudos merecem dar continuidade à linha de pesquisa de sempre priorizando o propósito de vincular os procedimentos aplicados com uma consistente e indispensável fundamentação de pesquisa básica no interesse da clínica odontopediátrica.

A Fuzzy Goal Programming model for solving aggregate production-planning problems under uncertainty: A case study in a Brazilian sugar mill

This paper proposes a Fuzzy Goal Programming model (FGP) for a real aggregate production-planning problem. To do so, an application was made in a Brazilian Sugar and Ethanol Milling Company. The FGP Model depicts the comprehensive production process of sugar, ethanol, molasses and derivatives, and considers the uncertainties involved in ethanol and sugar production. Decision-makings, related to the agricultural and logistics phases, were considered on a weekly-basis planning horizon to include the whole harvesting season and the periods between harvests. The research has provided interesting results about decisions in the agricultural stages of cutting, loading and transportation to sugarcane suppliers and, especially, in milling decisions, whose choice of production process includes storage and logistics distribution. (C)2014 Elsevier B.V. All rights reserved.

Emergetic ternary diagrams: five examples for application in environmental accounting for decision-making

In a recent paper, "A combined tool for environmental scientists and decision makers: ternary diagrams and emergy accounting." [Giannettti BF, Barrella FA, Almeida CMVB. A combined tool for environment scientists and decision makers: ternary diagrams and emergy accounting. J Clean Prod, in press http://dx.doi.org/10.1016/j.jclepro.2004.09.002] Ternary diagrams were proposed as a graphical tool to assist emergy analysis. The graphical representation of the emergy accounting data makes it possible to compare processes and systems with and without ecosystem services, to evaluate improvements and to follow the system performance over time. The graphic tool is versatile and adaptable to represent products, processes, systems, countries, and different periods of time.The use and the versatility of ternary diagrams for assisting in performing emergy analyses are illustrated by means of five examples taken from the literature, which are presented and discussed. It is shown that emergetic ternary diagram's properties assist the assessment of the system of the system efficiency, its dependance upon renewable and non-renewable inputs and the environmental support for dilution and abatement of process emissions. With the aid of ternary diagrams, details such as the interaction between systems and between systems and the environment are recognized and evaluated. Such a tool for graphical analysis allows a transparent presentation of the results and can serve as an interface between emergy scientists and decision makers, provided the meaning of each line in the diagram is carefully explained and understood. (c) 2005 Elsevier Ltd. All rights reserved.

Avaliação da influência da taxa de resfriamento posterior ao tratamento térmico nas propriedades mecânicas do aço API 5L X70

In this work a study about the mechanical properties of the API 5L X70 steel, with or without heat treating, has been made, with the intetion of assess the influence of cooling after the austenitization heat treating by air cooling (normalizing) and a rapid cooling with oil (tempering). This steel is known by high strength and ductility values and it is commonly used in the manufacture of oil pipes. The growing energy demand encouraged the study and manufacture of this material. Although this microalloyed dispense subsequent heat treatings, it was proven that its implementation is very advantageous for this type of application, improving hardness and plastic stability. It was also assessed that the faster the cooling rate is, the better will be these properties

Effect of time between adhesive application and photoactivation on adhesion and collagen exposure

Fundacao de Amparo a Pesquisa do Estado de sao Paulo (FAPESP)

Heterojunction between Al2O3 and SnO2 thin films for application in transparent FET

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Características da interface dos sites de notícias: um estudo do design e da usabilidade de jornais impressos e eletrônicos

The paper presents an ergonomic analysis of reading usability of electronic journals and the comparison with newspapers. As a method, it was adopted an evaluation of the user perception, from a printed questionnaire applied to a group of 41 people. Overall, the results indicate that on the analyzed newspapers there is need for greater care concerning the aspects of visual representation, involving more design application, usability, ergonomics, technology and communication.

Metodologia para otimização em subcontratação de serviço de usinagem

Operational Research (OR) is an eminent science to business competitiveness and the capacity of algorithms and spreadsheets that exist today allows people to apply them for a lower cost and with less complexity. However, spreadsheets linked to OR techniques, when directed to real problems, are still little explored in their full potential. In order to use them better, this article utilizes the Microsoft Office Excel to solve an optimization practical problem and decision-making of machining subcontracting. In general, although considered a frequent problem, is not of easy solution, optimize the mix of production versus outsourcing, because of the restrictions and resources available, it requests investments in specific software. In this way, this research aims to develop software to be called SOSU (Optimization Software for Machining Subcontracting). SOSU should introduce the best mix of internal and subcontracted machining for n types of parts that, over a certain period of time t, maximize capacity and meet all the demand at the lowest cost possible. The methodology adopted follows the bibliographic reference and it is assumed that the necessary data to prove from mathematical modeling of production areas and from a system of costs already structured. The nature of the problem justifies the application of Linear Programming (LP), Visual Basic for Applications (VBA) is used for computational implementation and interface with the user and the supplement Solver to find the solution. The analysis of the experiments show that the SOSU optimizes resources and improves the decision-making process, besides an easy operation, it can be implemented or quickly adapted and without the need of large investments.

Controle e aquisição de dados experimentais com tecnologia bluetooth em dispositivos móveis

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Resolução do problema de fluxo de potência ótimo pela meta-heurística algoritmo dos fogos de artifício de busca dinâmica com mutação de covariância

Pós-graduação em Engenharia Elétrica - FEIS

Análise da resistência à fadiga de tubos de aço API 5CT N80 Tipo Q soldados via processo de indução magnética de alta frequência (HFIW)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)