Learn More
We present a new method for the animation of fire on polyhedral surfaces. Using the notion of discrete straightest geodesics, we evolve fire fronts directly on the surface of arbitrarily complex objects. Animator control and motion complexity is achieved by driving the fire motion using multi-scale turbulent wind fields and geometric quantities. Our model(More)
Virtual Reality (VR) technology offers new options for neuropsychological assessment and cognitive rehabilitation. If empirical studies demonstrate effectiveness, virtual environments (VEs) could be of considerable benefit to persons with cognitive and functional impairments due to traumatic brain injury, neurological disorders, and learning disabilities.(More)
In brain-computer interfacing (BCI), motor imagery is used to provide a gateway to an effector action or behavior. However, in contrast to the main functional role of the primary motor cortex (M1) in motor execution, the M1's involvement in motor imagery has been debated, while the roles of secondary motor areas such as the premotor cortex (PMC) and(More)
In this paper, we explore haptic editing as a powerful way to enhance haptic realism. Building upon the framework of a previous implicit-based haptic technique, our haptic decoration technique allows the user to first paint directly on 3D models, and then to sense the thickness variation due to the added paint. Meanwhile, material editing permits the user(More)
Capsule endoscopy allows clinicians to wirelessly examine the small intestine using a capsule equipped with a miniscule camera. However, it has intrinsic limitations such as a lack of controlled capsule locomotion and limited therapeutic functions inside the gastrointestinal (GI) track. Recently, several researches have been conducted to prototype robotic(More)
We present a novel haptic rendering technique. Building on previous work, we propose a haptic model based on a volumetric description of the geometry of an object. Unlike previous volumetric approaches, we also find a virtual contact point on the surface in order to derive a penalty force that is consistent with the real geometry of the object, without(More)
We present haptic simulation and volume modeling techniques for a virtual dental training system. The system allows dental students to learn dental procedures and master their skills with realistic tactual feelings. It supports various dental procedures, such as dental probing, to diagnose carious lesions, drilling operation for cavity preparation, and(More)
We propose a novel method for monitoring cognitive engagement in stroke patients during motor rehabilitation. Active engagement reflects implicit motivation and can enhance motor recovery. In this study, we used electroencephalography (EEG) to assess cognitive engagement in 11 chronic stroke patients while they executed active and passive motor tasks(More)