In this work, possibility of simulating biological organs in realtime using the Boundary Element Method (BEM) is investigated. Biological organs are assumed to follow linear elastostatic material behavior, and constant boundary element is the element type used. First, a Graphics Processing Unit (GPU) is used to speed up the BEM computations to achieve the realtime performance. Next, instead of ...

Although computer graphics hardware has made tremendous advances over the last few years, there are many things which are still not feasible to render in realtime. One of these is the subset of surfaces referred to as ’microgeometry,’ where many small individual pieces combine to create a complex surface. Microgeometry is a problem for typical polygonal rendering systems, the method used in the...

In recent years, projector technology has become ubiquitous in the consumer market. Because of this, we see widespread use of projectors in academic as well as home applications. However, projector technology does have a few limitations. Firstly, projectors have a very narrow depth of field, thus focusing a projector can become a laborious procedure. Furthermore, because a projector essentially...

We present a novel high-frequency photoacoustic microscopy system capable of imaging the microvasculature of living subjects in realtime to depths of a few mm. The system consists of a high-repetition-rate Q-switched pump laser, a tunable dye laser, a 30-MHz linear ultrasound array transducer, a multichannel high-frequency data acquisition system, and a shared-RAM multi-core-processor computer....

The capability of learning is one of the salient features of realtime search algorithms such as LRTA*. The major impediment is, however, the instability of the solution quality during convergence: (1) they try to nd all optimal solutions even after obtaining fairly good solutions, and (2) they tend to move towards unexplored areas thus failing to balance exploration and exploitation. We propose...

Dynamically providing students with clear explanations of complex spatial concepts is critical for a broad range of knowledge-based educational and training systems. This calls for a realtime solution that can dynamically create 3D animated explanations that artfully integrate well-chosen speech. We present a visuo-linguistic framework for generating multimedia spatial explanations combining 3D...

Ubiquitous systems require user to be dynamically and realtime informed in order to make his current activity increasingly easy. First, this paper presents and discusses a method to model the realtime interaction of the user with a ubiquitous system based on Petri-nets modelling technology. The goal deals with investigating dynamically the appropriate form of interaction depending on the contex...

Many sound processing effects need or can benefit from realtime control of one or more parameters. During interaction with the processor optimum settings can be achieved, or settings can be signal dependent. Time variance is a keyword here. For some effects the routing and mapping of the controller signals is of higher complexity than the audio signal routing itself. A concept for controlling a...

A room simulator has been developed as part of a project involving virtual acoustic environments. The system is similar to auditorium simulators for home use. The simulated reverberant field is rendered using six loudspeakers evenly spaced around the perimeter of a listening area. Listeners are not constrained to any particular orientation, although best results are obtained near the center of ...