Today, they are students in colleges and universities. Tomorrow, they will be engineers in various industrial sectors. One of the primary goals of education is to prepare people for successful careers in the real world. As in every course, students want to obtain the maximum value of a CAD related course for their future careers. They want to obtain knowledge and skills that are most practical and useful to them when they become engineers. College professors and teachers also want to provide the maximum value for students in their CAD courses. The question is: what should be included in such a CAD curriculum. This paper tries to answer some critical questions related to developing such a curriculum, from an industrial perspective, based on the authors' survey results and the first author's own (rather limited) experiences as a R&D staff for a CAD vendor. It focuses on issues related to teaching and training students on CAD systems. These include, for different roles, how much underlying mathematical foundations in CAD systems should be taught, how much computer skills and engineering knowledge the students should know, how much design methodologies related to CAD systems should be taught, and how much ability the students should develop in order to specify their CAD needs and to evaluate and choose the CAD systems most suitable for their specific applications. The paper then shares some personal experiences and suggestions from long-term CAD veterans on the essential topics of CAD education. Based on the survey results, last section concludes the paper by authors' suggestions on what should be included in CAD curriculums for different levels of students.

This paper describes a computerized simulation system for less invasive vascular interventions using virtual-reality (VR)-based technology. A virtual human patient is constructed on top of the visible human data (VHD) incorporating in various vascular disease cases. Specially, the human vascular network is modeled for the use of catheterization simulation. Physical modeling technique is applied to model the interaction between the blood vessels and vascular catheterization devices. A haptic interface is integrated with the computer simulation system to provide tactile sensations to the user during the simulated catheterization procedures. The system can be used for training and pretreatment planning of interventional vascular procedures.

We present algorithms for computing the differential geometry properties of intersection curves of two surfaces where the combination of two surfaces can be parametric-parametric, implicit-implicit and parametric-implicit. We derive unit tangent vector, curvature vector, binormal vector, curvature, torsion, and algorithms to evaluate the higher-order derivatives for transversal as well as tangential intersections for all three types of intersection problems.

This paper elaborates the implementation of boundary evaluation of interval-based manifold and non-manifold solid models, based on the interval geometric representation and graph-based data structure for interval geometries. Boundary evaluation of 2D interval objects is introduced first. The paper then focuses on boundary evaluation of 3D interval objects based on the refinement of vertex, edge, face and shell nodes. Examples are given to illustrate the method. Copyright

This paper presents efficient methods for directly generating B