Laure France

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This paper surveys the set of techniques developed in Computer Graphics for animating human walking. First, we focus on the evolution from purely kinematic \knowledgebased" methods to approaches that incorporate dynamics constraints, or use dynamics simulations to generate motion. Then, we review the recent advances in motion editing, that enable the(More)
In this paper, we propose a new approach to simulate the small intestine in a context of laparoscopic surgery. The ultimate aim of this work is to simulate the training of a basic surgical gesture in real-time: moving aside the intestine to reach hidden areas of the abdomen. The main problem posed by this kind of simulation is animating the intestine. The(More)
Pixed (Project Integrating eXperience in Distance Learning) is a research project attempting to use learners’ interaction logs gathered as learning episodes to provide contextual help for learners trying to navigate their way through an ontology-based Intelligent Tutoring System (ITS). First, we propose a model to describe a learning session, a way to log(More)
In this paper, we present a system dedicated to the simulation of various physically-based and mainly deformable objects. Its main purpose is surgical simulation where many models are necessary to simulate the organs and the user’s tools. In our system, we found convenient to decompose each simulated model in three units: The mechanical, the visual and the(More)
In this paper, we propose an approach based on visualization to support the teacher to observe the students’ activities. After comparing the teaching in classical rooms and in e-learning systems, we present some visualization techniques used in various domains. The paper then focuses on visualization techniques in order to help the teacher to better(More)
In this paper, we propose a modeling of the intestines by implicit surfaces for abdominal surgery simulation. The difficulty of such a simulation comes from the animation of the intestines. As a matter of fact, the intestines are a very long tube that is not isotropically elastic, and that bends over itself at various spots, creating multiple self-contacts.(More)
The ultraviolet circular dichroism of a protein can be used to estimate the net fraction of its amino acids in different classes of secondary structure. Recent advances in the accuracy of such calculations have resulted from improved computational techniques, as well as extension of the spectral region analyzed to wavelengths less than 180 nm, a wavelength(More)
The work reported here takes place in the educational domain and deals especially with observation of pedagogical activity. User behavior is observed through the raw traces (log files) of their activity from multiple sources. The main point of this paper deals with a very important stage, generally not described: the preparation of an observed experiment by(More)
The etiological agent of Lyme disease is the tick-borne spirochete, Borrelia burgdorferi. A major antigen of B. burgdorferi is a 31 kDa lipoprotein called outer surface protein A (OspA). Recently, a truncated form of OspA (lacking 17 amino acids at the N-terminus) was cloned, expressed and purified in large quantities (Dunn, J.J., Lade, B.A. and Barbour,(More)