This paper presents an "inverse" reasoning to solve problems of sunlighting, visibility and solar reflection in architectural and urban spaces. We propose a numerical model which enables to mix these parameters. Inverse simulation considers the relation between a given observer or an area and environmental elements. This relation represents a volumetric constraint. The CAD tool which is develop...

The long-standing goal of computer aided design (CAD)/computer aided engineering (CAE) integration demands seamless interfaces between geometric design and engineering analysis/simulation tasks. The key challenge to this integration stems from the distinct and often incompatible roles geometric representations play, respectively, in design and analysis. This paper critically examines and compar...

The fourth workshop Decision Diagrams – Concepts and Applications in the series Computer Aided Design and Test at the IBFI SchloßDagstuhl was organized by Bernd Becker (Univ. Freiburg), Randy Bryant (Carnegie Mellon Univ.), Masahiro Fujita (Fujitsu Labs. San José) and Christoph Meinel (Univ. Trier). It was attended by 39 scientists. Binary Decision Diagrams (BDDs) have found widespread use in c...

This paper presents a control model of the hydroforming and the dual hydroforming process of a tube. The theoretical part includes calculations to measure the change in tube thickness through the developed process. The hydroforming and the dual hydroforming processes are simulated in the SOLIDSIMULATION software and the static and the dynamic simulations are modeled. The obtained results for th...

All engineering firms maintain archives of previously designed artifacts, often in the form of databases of computer aided design (CAD) data. Design repositories are an evolution of such databases to include more heterogenous information and to provide enhanced capabilities through the application of knowledge representation techniques. This paper introduces on-going work on applying descriptio...

Often in modeling the engineering optimization design problems, the value of objective function(s) is not clearly defined in terms of design variables. Instead it is obtained by some numerical analysis such as FE structural analysis, fluid mechanic analysis, and thermodynamic analysis, etc. Yet, the numerical analyses are considerably time consuming to obtain the final value of objective functi...