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The inability to render realistic soft-tissue behavior in real time has remained a barrier to face and content aspects of validity for many virtual reality surgical training systems. Biophysically based models are not only suitable for training purposes but also for patient-specific clinical applications, physiological modeling and surgical planning. When(More)
We present a hybrid framework for physics-based simulation of fracture and debris clouds. Previous methods mainly consider bulk fractures. However, in many situations, small fractured pieces and debris are visually important. Our framework takes a hybrid approach that integrates both tetrahedron-based finite element and particle-based meshfree methods. The(More)
PURPOSE To determine if the photon beams associated with several models of accelerators are matched with 'Golden Beam' data (VGBD) to assess treatment planning modeling and delivery. METHODS Six accelerators' photon beams were evaluated to determine if they matched the manufacturer's (Varian Medical Systems, Inc.) VGBD. Additional direct comparisons of(More)
Abslract-We present a set of recent results on the control of movements in which the hand interacts with force fields that simulate the presence of dynamical objects and of surface boundaries. These experiments exploit the possibility of using humanlrobot interactions for exploring if and how the smoothness is enforced by the adaptive control system. We(More)
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