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New CAD/CAM materials are becoming more accepted in veneer restoration. The objective is to investigate the margin integrity of CAD/CAM veneer, their color masking over dark backgrounds and shear bond strength (SBS) to resin cements. Materials and Methods: Four types of CAD/CAM materials shaded A2: Lava Ultimate (LU); IPS Empress CAD (IPS); Vita Enamic (VE); and Vitablocs Mark II (VMII) were sectioned into tiles of different thicknesses: 0.3mm, 0.5mm and 0.7mm (n=7). The color (CIE - L*a*b*) of each specimen was measured against grey background, then against each tooth-shaded background: A3, A4, B3 and C2 acrylic (Coldpac, Motloid). Color differences (ΔE) were calculated. Specimens were measured against black then white background to calculate translucency. Two-way ANOVA was used to compare the differences in ΔE among the groups (a=0.05). SBS values of 2mm thick tile specimens of the same CAD/CAM materials to resin cements, RelyX Ultimate and Varilonik Veneer, were measured using Instron Universal Testing Machine. (n=10). Statistical analysis was performed by ANOVA with Tukey-Kramer HSD multiple comparison test (a=0.05). Qualitative evaluation of margin integrity of the veneers milled from the same CAD/CAM materials in three thicknesses 0.3, 0.5 and 0.7mm were observed under the optical microscope. Results: Significant differences in masking capabilities were found among the tested material for all three thicknesses. In comparison of ΔE values of the tested materials over tooth-shaded backgrounds, specimens over shade A3 background showed the highest color masking ability. LU and VE exhibited better color masking than IPS and VMII. IPS showed significantly higher in translucency than the other groups. IPS showed the highest SBS to resin cements and LU showed lowest SBS. Materials cemented with RelyX showed significantly higher SBS values than those with Variolink. CAD/CAM milled LU and VE veneers show smoother margins when compared to IPS and VMII. Conclusion: LU and VE exhibited higher color masking, lower translucency, lower SBS values, and better margin integrity than IPS and VMI. / 2019-09-26T00:00:00Z

Computational human models have become essential in several different biomedical and electrical engineering research areas. They enable scientists to study, model, and solve complex problems of human body responses to various external stimuli including electromagnetic and radio-frequency signals. This study describes the algorithms and procedures of creating multi-tissue full-body Computer-Aided Design (CAD) human models. An emphasis is made on full-body shells of variable thicknesses, e.g. skin, fat, and average body container shells. Such shells, along with internal organs, are useful for multiple high- and low-frequency simulations in a variety of applications. Along with the creation of full-body models, an automatic algorithm to selectively decimate the meshes based on average surface curvature is developed. The algorithm will significantly reduce model size while keeping the same interpolation accuracy.

A informática tem um amplo campo de atuação e sua evolução não tem sido apenas em direção à conquista de mais capacidade de memória e velocidade, mas principalmente no que tange aos três elementos básicos da comunicação: emissor, mensagem e receptor. As interfaces estão sendo otimizadas para que os usuários aumentem suas condições de concepção de projetos e diminuam o tempo necessário para adquirir conhecimento técnico e habilidade no manuseio. Sem dúvida, o computador ainda é motivo de travamento da fluidez do pensamento e ação sobre o mesmo, afinal investem-se tempo e memória para o aprendizado do manual de instrução ou tutoriais, se assim preferirem. Diante deste contexto em que todos se vêem acoplados a vários sistemas computacionais complexos, o recorte para este trabalho restringiu-se a um pequeno universo referente ao aprendizado da computação gráfica no curso de Arquitetura e Desenho Industrial da Faculdade de Artes Plásticas da Fundação Armando Álvares Penteado FAAP. Não houve a pretensão de se aprofundar a análise na área de ensino e aprendizado por falta de tempo para o domínio de um conhecimento no assunto, mas a essência é o alerta para os profissionais do ensino superior, no caso o curso de Arquitetura, se conscientizarem do amplo espectro de possibilidades de recursos computacionais como ferramenta didática para a concepção de modelos explorativos objetivando um aumento no tempo da investigação. / Information Technology provides a large range and its development is not only to improve memory and speed capacity but mainly to get the three basic principles of connection : sender, message and receiver. Interfaces have been optimized for users to add their possibilities of projects conceiving and to shorten the necessary time to acquire technical knowledge and handling abilities. Certainly, computer restrains thought streams and proceedings about it, so it has been invested in time and report for learning the instruction manual or tutorials, whether it is preferred. Due to this argument it becomes known that people are attached to several systems , then the aim of this project has restricted to a limited subject referring to learning of graphic design in the Architecture Course and Industrial Draw at FAAP - Fundação Armando Alvares Penteados Plastic Arts College. The claim was not to make a profound analysis in educational area in default of time to research about it more, but the most important is the advice to all graduated professionals, mainly the Architecture course ones, to keep aware about the large computer resources possibilities as a pedagogical tool to develop models, resulting in more time for researching.

by Wai Bong Ngai. / Bibliography: leaves 105-106 / Thesis (M.Ph.)--Chinese University of Hong Kong, 1985

Graph and network theory have become commonplace in modern life. So widespread in fact that most people not only understand the basics of what a network is, but are adept at using them and do so daily. This has not long been the case however and the relatively quick growth and uptake of network technology has sparked the interest of many scientists and researchers. The Science of Networks has sprung up, showing how networks are useful in connecting molecules and particles, computers and web pages, as well as people. Despite being shown to be effective in many areas, network theory has yet to be applied to mechanical engineering design. This work makes use of network science advances and explores how they can impact Computer Aided Design (CAD) data. CAD data is considered the most valuable design data within mechanical engineering and two places large collections are found are educational institutes and industry. This work begins by exploring 5 novel networks of different sized CAD collections, where metrics and network developments are assessed. From there collections from educational and industrial settings are explored in depth, with novel methods and visualisations being presented. The results of this investigation show that network science provides interesting analysis of CAD collections and two key discoveries are presented: network metrics and visualisations are shown to be effective at highlighting plagiarism in collections of students' CAD submissions. Also when used to assess collections of real world company data, network theory is shown to provide unique metrics for analysis and characterising collections of CAD and associated data.