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Um metamodelo para facilitar a integração de ferramentas de visualização de software e mineração de interesses transversais
(Universidade Federal de São Carlos, 2013-11-22) Tanner, Oscar José Fernandes; Penteado, Rosângela Aparecida Dellosso; https://lattes.cnpq.br/4061946080136286; https://lattes.cnpq.br/8630115599550681
A goal of the Object-Oriented Programming is to develop software with better modularization and separation of concerns, although tangling and scattering of some of these concerns cannot be prevented. The Aspect-Oriented Programming was proposed to solve this problem. However, the identification of the scattering and tangling concerns, also known as crosscutting concerns (CC), is not simple. To assist this identification, it is recommended the use of CC Mining tools (MT), but some MTs do not properly display these CCs in the source code. One way to improve the presentation of this CCs is displaying them through software visualization tools. Software visualization aims to abstract the structural information of the software through visual metaphors. However, it is not always simple to integrate CC and visualization tools, because each tool store their results in a specific format that is usually not recognized by the others. In order to solve this problem, this work created a metamodel that facilitates this integration. The results obtained from a MT are transformed to this metamodel format, so they can be processed by a software visualization tool. Presenting the results of a MT through software visualization tools helps the comparison of these results, facilitating the detection of false negatives and the identification of visual patterns that indicate false positives. Four MT and two software visualization tools were integrated to demonstrate the benefits of an integrated environment. Moreover, two experiments were conducted: one to evaluate the use of the proposed metamodel; and another to evaluate the use of the integrated environment. The results revealed that the use of the proposed metamodel facilitates this integration and the software engineer must be a specialist of each of the integrated tools in order to enjoy the benefits from this integration.
Simulação numérica do forjamento a quente de um aço baixo carbono em matriz fechada acoplado com a evolução microestrutural
(Universidade Federal de São Carlos, 2013-11-22) Moraes, Araldo Luiz Isaias de; Balancin, Oscar; https://lattes.cnpq.br/8379205949387493; https://lattes.cnpq.br/9329544049345234
Hot closed die forging is the most used process to produce metal parts used in supporting and fixing cable conductors in transmission lines of electric power. In this forming process, the microstructural quality of the products, in most cases, is dependent on the control of several parameters during processing such as the geometry of dies and the starting material, the number of stages of deformation, operational sequence, temperature, strain, strain rate, and others. Thus, this work aimed to analyze the process parameters such as temperature, strain and strain rate as well as the microstructural evolution during the hot closed die forging of a low carbon steel through the use of commercial software for analysis of forming processes based on finite element method. The numerical simulation of the complete process of hot forging of product ball hook was conducted, in order to reproduce the real industrial process. The results showed that the simulation was efficient to describe parameters evaluations, since the results obtained were consistent with those found in the real process and there was good agreement when comparing simulated average grain size and measured by optical microscopy.