In this paper, we show how to deform a planar rational cubic based on a local interpolation constraint while retaining the qualitative shape of the curve. An impedance-type, parallel haptic device is used to signal changes of the number of inflection points, cusps and loops during the deformation. In this way, the user is provided with an intuitive and natural guidance throughout the curve's shape generation process in CAD.
Based on traffic data acquisition by the vehicles themselves, road traffic self-organization has been studied for several years. Geolocation equipment is now available at an affordable cost. With the IEEE-802.11 p standard, wireless inter-vehicle communication is of age. This explains current interest for this subject, the practical applications being immediate. In this paper, we study this type of system with a simulator able to treat realistic traffic situations, and to take into account interactions between the physical (vehicles) and informational (data) traffics. Such an integrated approach allows to obtain global informations on the effectiveness of the strategies used (for example, the broadcasting of traffic information). This characteristic distinguishes our research from those which optimize some parts of the problem separately. This document presents the preliminary results obtained from the FORESEE simulator, developed according to this principle. These results clearly display the effectiveness of self-organization when a road network is nearly saturated.
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