We present an efficient, user-guided volumetric approximation algorithm, specifically designed for physically-based animation. Our method combines automatic and interactive segmentation methods to give users an intuitive and easy way to approximate 3D meshes. Our approach first constructs the simplified medial axis transform (MAT) of the input mesh object, and segments the medial axis (MA) into...

In this paper, we highlight our past experiences on fast penetration depth computation and its applications in different areas such as physically-based animation, 6DOF haptic rendering and robot motion planning.

Physically-based animation techniques enable more realistic and accurate animation to be created. We present a GPU-based finite element (FE) simulation and interactive visualisation system for efficiently producing realisticlooking animations of facial movement, including expressive wrinkles. It is optimised for simulating multi-layered voxel-based models using the total Lagrangian explicit dyn...

Realism has always been a goal in computer graphics. However, the algorithms involved in mimicking the physical world are often complex, abstract, and sensitive to changes in experimental parameters. We present an interface to a physically-based algorithm, a thin shell animation, which focuses on visualization, experimentation, and control. Through the use of dynamic surface coloring, abstract ...

BACKGROUND Disability is more based on social, rather than medical aspects. Lack of attention and social support may impact on participation of people with physical disability in various aspects and their return to normal life in the society. OBJECTIVES This study was conducted to determine perceived social support and related factors among physically disabled in the city of Tehran. PATIENT...

Accurate physical modeling of transient dynamics with contact is validated by experiment and generally requires simulation at close to convergent spatial and temporal grid sizes. This makes even a single forward dynamic simulation run in 3D prohibitively expensive. On the other end of the spectrum physically based animation methods seek efficiency by pushing simulations towards maximally stable...

This research is based on experimental and numerical investigations of human lumbar spine. Human intervertebral discs usually exhibit highly anisotropic mechanical responses in a finite strain regime under physiological loading conditions. Human disc body units basically consist of a fluid filled cavity (nucleus pulposus) approximately at the disc center and surrounding tissue reinforced by col...

From the outset, mathematicians and physicists have been concerned with the ways in which solutions to this equation can be associated to classical particle motion, and the ways in which they cannot: the classical dynamical behavior of particles is intermixed with dispersive spreading and interference phenomena in quantum theory. More recently, nonlinear Schrödinger equations have come to play ...

The dynamics of the highly nonlinear fifth order KdV-type equation is discussed in the framework of the Lagrangian and Hamiltonian formalisms. The symmetries of the Lagrangian produce three commuting conserved quantities that are found to be recursively related to one-another for a certain specific value of the power of nonlinearity. The above cited recursion relations are obeyed with a second ...

In this paper, the issue of nonlinear sensitivity analysis for dimensionality reduction in hydrologic model calibration is discussed, and a novel method to quantify the sensitivity of each parameter that considers the nonlinear relationship in the model is presented. The method is based on computing the absolute variation of the nonlinear function represented by the model in its parameter space...