Liliane dos Santos Machado

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Immersive systems allow a high degree of involvement for the users and they can offer wide visual field and stereoscopic visualization for multiple users. This paper presents the VirtWall, a concept that uses a single fast processor and a dual-head video card to produces immersive stereo graphics for virtual reality applications at low-cost. The main goal(More)
Discussions about distance learning are not a novelty. In the last years, several systems to support learning were proposed and developed, some of them based on the Internet. For statistics teaching, as in other areas, there are many systems for distance learning in the web that only present a digital version of the traditional classes' content. Besides of(More)
Bone marrow transplant is a relatively new procedure to treat recently considered incurable diseases. One important part of the procedure is the process of harvesting the donor bone marrow. We are developing a virtual reality simulator for bone marrow harvest that integrates interactive stereo visualization and force feedback techniques. The main objective(More)
An on-line evaluator for training in simulators based on virtual reality must have a low complexity algorithm to do not compromise the performance of the simulator. Several approaches to perform that evaluation for on-line or off-line training simulators based on virtual reality have been proposed. We propose a new approach to on-line evaluation using(More)
 In the past few years, Virtual Reality Systems (VRS) have been used as an approach for the development of effective training systems. The CyberMed is a free software system that offers libraries for the development of simulation applications for medical teaching and training based on VRS. The system includes functionalities as stereoscopic visualization,(More)
 Several approaches for evaluation of online or offline training in simulators based on virtual reality have been proposed. However great part of these approaches has a high complexity and it demands large computational structure, what is very expensive. An online evaluator must have low complexity algorithm to do not compromise the performance of(More)
Virtual Reality has been used to simulate procedures in several fields, especially those where critical tasks are involved as simulation of some invasive medical procedures. We are developing a low-cost haptic and stereo simulator for bone marrow harvest for transplant. The system includes an intelligent evaluation procedure that allows classify the trainee(More)
 In several research areas, virtual reality environments have been constructed for training objectives. The goal is to immerge the user into a virtual world to provide realistic training and realistic interactions. However, it is important to know the quality of training to provide a status of the user performance. An online evaluation system allows the(More)