In this paper, a method is presented for modeling sound propagation in rooms using a signal processing approach. Low order digital filters are designed to match to sound propagation transfer functions calculated from boundary material and air absorption data. The technique is applied to low frequency, finite difference time domain (FDTD) simulation of room acoustics and to real-time image-sourc...

Enabling quality of service in Grids requires not only resource management strategies but also the development of protocols enabling structured negotiation for the use of resources. In this paper, we describe design, implementation, and application of an agreement-based infrastructure. We then discuss its use in the virtual control room developed for the National Fusion Collaboratory.

In this paper, a method is presented for modeling sound propagation in rooms using a signal processing approach. Low order digital filters are designed to match to sound propagation transfer functions calculated from boundary material and air absorption data. The technique is applied to low frequency, finite difference time domain (FDTD) simulation of room acoustics and to real-time image-sourc...

Virtual Path (VP) concept has been gaining attention in terms of eeective deployment of ATM (Asyn-chronous Transfer Mode) networks in recent years. In this paper, we discuss a multi-hour, multi-traac class network (capacity) design model for providing speciied quality-of-service in dynamically reconngurable ATM networks. Our approach is based on statistical multi-plexing of traac within a traac...

This chapter reviews contemporary research on virtual collaboration. In particular, we focus on synchronous communication and collaboration processes in virtual conferencing environments. In a virtual conference, interactants are geographically distant but their avatars (virtual representations) appear in the same virtual conference room. Two types of virtual collaboration are examined. First, ...

Effective control of the perceived location of virtual sound sources is an important aspect of auditory displays. While room acoustics modelling may be used to produce cues related to the sound source and listener location in a space, in many real-time applications it is more feasible to utilize ready-made room impulse responses. This paper looks at how the perception of distance can be affecte...

An I-Room is an “intelligent room” which can act as a knowledge aid to support collaborative meetings and activities, especially when these involve sense-making about the current context, planning, considering options, and decision-making. The I-Room provides a generic technology basis for a wide range of potential collaborative applications and uses. It can provide a conduit for accessing inte...

BACKGROUND Context conditioning has been suggested to model clinical anxiety, but context, as manipulated in animal models, has not been translated to human studies. A virtual environment might prove to be the ideal tool for innovative experimental paradigms to study explicitly cued fear and contextual anxiety in humans. METHODS Subjects were guided through a virtual environment that consiste...