Browsing by Author "Burkhardt, J. M."

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    Multisensory VR exploration for computer fluid dynamics in the CoRSAIRe project
    (Springer-Verlag, 2009) Vezien, J. M.; Menelas, B.; Nelson, J.; Picinali, Lorenzo; Bourdot, P.; Ammi, M.; Katz, B. F. G.; Burkhardt, J. M.; Pastur, L.; Lusseyran, F.
    In the last 30 years, the evolution of digital data processing in terms of processing power, storage capacity, and algorithmic efficiency in the simulation of physical phenomena has allowed the emergence of the discipline known as computational fluid dynamics or CFD. More recently, virtual reality (VR) systems have proven an interesting alternative to conventional user interfaces, in particular, when exploring complex and massive datasets, such as those encountered in scientific visualization applications. Unfortunately, all too often, VR technologies have proven unsatisfactory in providing a true added value compared to standard interfaces, mostly because insufficient attention was given to the activity and needs of the intended user audience. The present work focuses on the design of a multimodal VR environment dedicated to the analysis of non-stationary flows in CFD. Specifically, we report on the identification of relevant strategies of CFD exploration coupled to adapted VR data representation and interaction techniques. Three different contributions will be highlighted. First, we show how placing the CFD expert user at the heart of the system is accomplished through a formalized analysis of work activity and through system evaluation. Second, auditory outputs providing analysis of time-varying phenomena in a spatialized virtual environment are introduced and evaluated. Finally, specific haptic feedbacks are designed and evaluated to enhance classical visual data exploration of CFD simulations.
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    Multisensory VR interaction for protein-docking in the CoRSAIRe project
    (Springer-Verlag, 2009) Ferey, N.; Nelson, J.; Martin, C.; Picinali, Lorenzo; Bouyer, G.; Tek, A.; Bourdot, P.; Burkhardt, J. M.; Katz, B. F. G.; Ammi, M.; Etchebest, C.; Autin, L.
    Proteins take on their function in the cell by interacting with other proteins or biomolecular complexes. To study this process, computational methods, collectively named protein docking, are used to predict the position and orientation of a protein ligand when it is bound to a protein receptor or enzyme, taking into account chemical or physical criteria. This process is intensively studied to discover new biological functions for proteins and to better understand how these macromolecules take on these functions at the molecular scale. Pharmaceutical research also employs docking techniques for a variety of purposes, most notably in the virtual screening of large databases of available chemicals to select likely molecular candidates for drug design. The basic hypothesis of our work is that Virtual Reality (VR) and multimodal interaction can increase efficiency in reaching and analysing docking solutions, in addition to fully a computational docking approach. To this end, we conducted an ergonomic analysis of the protein–protein current docking task as it is carried out today. Using these results, we designed an immersive and multimodal application where VR devices, such as the three-dimensional mouse and haptic devices, are used to interactively manipulate two proteins to explore possible docking solutions. During this exploration, visual, audio, and haptic feedbacks are combined to render and evaluate chemical or physical properties of the current docking configuration.