The objective of this study is to develop "Virtual Collaborator" as a new type of humanmachine interface, which works as "intelligent interface agent" to help machine operators controlling large scale machine system such as power plants. In this paper, first, the basic concept of the virtual collaborator is introduced. And, the prototype system of the virtual collaborator is described. At prese...

The purpose of this paper is to explore the acceptance and the appropriation of videoconferencing-mediated training during real training situations in a French company. We compare the acceptance and appropriation by 60 employees of two videoconferencingmediated training systems : the virtual class (desktop videoconferencing) and the remote class (where learners are gathered together in the same...

this paper presents some analyses about the robust practical stability of a class of nonlinear affine systems in the presence of non-vanishing perturbations based on the passivity concept. the given analyses confirm the robust passivity property of the perturbed nonlinear systems in a certain region. moreover, robust control laws are designed to guarantee the practical stability of the perturbe...

The purpose of this paper is to explore the acceptance and the appropriation of videoconferencingmediated training during real training situations in a French company. The authors compare the acceptance and appropriation by 60 employees of two videoconferencing-mediated training systems: the virtual class (desktop videoconferencing) and the remote class (where learners are gathered together in ...

Virtual Path (VP) concept is gaining recently attention in terms of eeective deployment of ATM networks. In this paper, we present models and algorithms for network design and management of ATM networks based on virtual path concept from a network planning perspective. Our approach is based on statistical multiplexing of traac within a traac class by using a virtual path for the class and deter...

Real-time interactive virtual classroom is an important type of distance learning. However currently available systems are insufficient in the support of large-scale user access and cannot accommodate heterogeneous devices and networks access either. Furthermore, these systems are usually desktop-based, which means the teacher experience is completely different from teaching in a real classroom...

This paper examines a necessary condition for successful exploitation of a virtual environment (VE) in therapeutic intervention for fear of public speaking. The condition is that clients experience a degree of anxiety in the VE that is similar to what they would have been expected to experience in a similar real world setting. We refer to this as a "presence" response. The experimental study in...

In this work, aspects in real-time modeling and synthesis of three-dimensional sound in the context of digital audio, multimedia, and virtual environments are studied. The concept of virtual acoustics is discussed, which includes models for sound sources, room acoustics, and spatial hearing. Real-time virtual acoustics modeling is carried out using a real-time parametric room impulse response r...

The surface energy of MgO is determined using experimental data collected from equilibrated thermal grooves circumscribing island grains. Local equilibrium assumptions at each groove require that the Herring equations be satisfied at each data site, thereby yielding a large and overdetermined system of equations involving the surface energy γ. This inverse problem is then solved using a new tec...