The Coordination of interdependencies between tasks in collaborative environments is a very important and difJicult endeavor. The separation between tasks and interdependencies allows f o r the use of different coordination policies in the same collaborative environment by changing only the coordination mechanisms that control the interdependencies. This paper presents a framework for the defin...

The educational collaborative virtual environment supposes the active participation of students and teachers, interacting highly and aiming the knowledge exchange and creation of new abilities. The learning becomes a process that one assists the other to reach the objective, by changing experiences, dialogues, discussion of ideas, accomplishment of group, and individual activities that can be s...

A procedure for the evaluation of instructional techniques based on fictitious scenarios is described; it has been used to make the compared analysis of two strategies of cross-training applied as instructional techniques in the initiation of human groups that will be trained in tasks of sociotechnical nature. The training strategy uses two fictitious scenarios through which knowledge, abilitie...

In this paper we present #SEVEN, a sensor effector model that enables the execution of complex scenarios for driving Virtual Reality applications. #SEVEN is based on an enhanced Petri net model which is able to describe and solve intricate event sequences. Our model also proposes several useful features for the design of collaborative scenarios for Collaborative Virtual Environments such as ver...

This paper describes the findings of ethnographical research which elaborates and analyses the interaction forms of a contemporary multiplayer game. The motivation for the research originates from the issue that the lack of intuitive and non-intrusive interaction cues is one of the distinctive features separating desktop virtual reality settings from face-to-face encounters. The analysis of the...

In this work, it is described some of the results of an ongoing research focused on developing communicative practice in foreign languages, using networked virtual environments, which can be explored cooperatively over the Internet. A courseware, the Tour Guide Virtual Course, was specially designed to use virtual reality environments that represent the environments typically found in the daily...

The concept of Collaborative Virtual Environments has been deployed in many systems in the past few years. Applications of such technology have been used anywhere from military combat simulations to various civilian commercial applications. In this paper we present a specific system developed for industrial teletraining. The system, which aims to reduce the cost of training, consists of an inte...