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Collision detection is an important component of many applications in computer graphics applications. In particular, it is a critical question for virtual environments applications, where real time performance is required to provide the feeling of being immerse in a environment that looks and is interactive like a real one. In this paper, we look into(More)
In the framework of the European project aimed at the sequencing of the Bacillus subtilis genome the DNA region located between gerB (314 degrees) and sacXY (333 degrees) was assigned to the Institut Pasteur. In this paper we describe the cloning and sequencing of a segment of 97 kb of contiguous DNA. Ninety-two open reading frames were predicted to encode(More)
Nowadays health concerns are effectively becoming ubiquitous. Most people have the need to effectively control their nutritional consumptions, mostly due to health issues. Personal computational devices may assist this control with a solution that allows an efficient management of each individual nutritional profile. In this work we propose a mobile service(More)
1. ABSTRACT This paper presents a constraint-based virtual environment which is being developed to support the assessment of assembly and maintenance tasks within a CAVE environment. The proposed environment provides an integrated framework for supporting both assembly and disassembly operations. This environment is being evaluated using realistic(More)
Virtual prototyping tools have already captivated the industry's interest as a viable design tool. One of the key challenges for the research community is to extend the capabilities of Virtual Reality technology beyond its current scope of ergonomics and design reviews. The research presented in this paper is part of a larger research programme that aims to(More)
Due to the growth of potential of Wireless Sensor Networks (WSN), now becomes possible to use this technology in various new generation services such as monitor environment characteristics like temperature, humidity, among others. WSNs are emerging as a new paradigm, gathering information in a collaborative way, where independent sensor nodes collect and(More)
This paper presents the design and implementation of a constraint-based virtual environment for supporting interactive assembly and maintenance tasks within an immersive virtual reality environment. The system architecture of the constraint-based virtual environment is based on the integration of components such as OpenGL Optimizer, Parasolid geometric(More)
This article presents and describes the implementation of an augmented reality system to assist in the task of warehouse inventory. The proposed system integrates an augmented reality engine (NyARToolkitCS) with a QR Code library. This integration enables users to capture product codes add the product's information to the view of the product itself. This(More)
With the increasing number of mobile devices it is necessary to create adapted solutions for this type of devices that respect their limited processing capacities, memory and bandwidth. We propose a synchronization model based on message digests to synchronize relational databases between mobile devices and a server, in order to minimize the data(More)