Skinning geometry effectively continues to be one of the more challenging and time consuming aspects of character setup. While anatomic and physically based approaches to skinning have been investigated, many skinned objects have no physical equivalents. Geometric approaches, which are more general and provide finer control, are thus predominantly used in the animation industry. Free-form defor...

We present a new approach to surface tracking applied to 3D medical data with a deformable model. It is based on a parametric model composed of a superquadric t followed by a Free-Form Deformation (FFD), that gives a compact representation of a set of points in a 3D image. We present three diierent approaches to track surfaces in a sequence of 3D cardiac images. From the tracking, we infer quan...

This paper is a summary of the results we presented at the Feature Panel Session of the 1997 ASME Computers in Engineering Conference. Five participating groups submitted a total of nine test parts for feature recognition. To these test parts, we have applied our feature recognition method using a convex decomposition method called Alternating Sum of Volumes with Partitioning (ASVP). By applyin...

In this paper, a nonlinear theory applicable to the design of nanotube based devices is presented. The role of finite kinematics for a doubly clamped nanotube device is investigated. In particular, we analyze the continuous deformation and instability (pull in) of a clamped-clamped nanotube suspended over an electrode from which a potential differential is imposed. The transformation of an appl...

The main objective of this paper is to investigate the performance trade off with MSK, BPSK and QAM_64 modulation techniques. Investigations have been reported to compare the performance and tradeoffs of MSK, BPSK and QAM_64 modulation schemes. Here modulation schemes have been identified which gives significant performance improvement over the other based on energy consumption and power recept...

Introduction 1. How to Solve the Deformation Equation 2. Deformations of Singularities 3. Smoothing Components of Curves 4. The Versal Deformation of L14 5. Remarks References Acknowledgement Electronic Availability In recent years I have computed versal deformations of various singularities, partly by hand, but mostly with the program Macaulay. I explain here how to do these computations. As a...

Orthodontic torque expression is the result of axial rotation of rectangular archwires within a rectangular bracket slot. This study investigates the effect of bracket material on torque expression. Torque exerted by a rotating archwire on each bracket will be measured as well as the relative deformation of each bracket slot. A total of 60 tests were performed where archwires were rotated withi...

Original scientific paper Time-dependent deformations in soft rocks represent an important part of total deformations which occur after excavation of the tunnel opening. In the light of this, comprehensive laboratory uniaxial creep tests were performed on marl rock monolits. The testing used marl as a chosen representative rock samples of the group of soft rocks which exhibits creep behaviour. ...

The tibio-femoral contact area in five current popular total knee joint replacements has been measured using pressure-sensitive film under a normal load of 2.5 kN and at several angles of flexion. The corresponding maximum contact pressure has been estimated from the measured contact areas and found to exceed the point at which plastic deformation is expected in the ultra-high molecular weight ...

Osteonecrotic collapse of the femoral head is a common refractory disease in orthopedics, and the occurrence of collapse is an important factor in the prognosis of this condition. Osteonecrotic collapse of the femoral head can be delayed or prevented by the formation of a sclerotic rim. This study used finite element analysis to evaluate the mechanical role of a proximal sclerotic rim on stress...