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Cell adhesion molecules are expected to play an important role in long-term storage of information in the central nervous system. Several of these glycoproteins, such as NCAM, L1, and the ependymins, express the HNK-1 carbohydrate structure, which is known to be involved in cell-cell and cell-matrix interactions. To investigate the contribution of the HNK-1(More)
To investigate the involvement of the cell adhesion molecules L1.1, L1.2, NCAM, and tenascin-C in memory formation, zebrafish (Brachydanio rerio) were trained in an active avoidance paradigm to cross a hurdle to avoid mild electric shocks after a light signal. Application of [(14)C]deoxyglucose prior to the training session revealed an increased energy(More)
Autism is a complex neuropsychological disorder characterized by qualitative alterations in social interaction and interpersonal communication. The aim of this study is to estimate the interaction between autistic children and a mobile toy robot during free spontaneous game play. The duration of different criteria including eye contact, touch, manipulation,(More)
This paper describes a frescoes based method aiming at the representation of an indoor environment for mobile robot navigation. In particular, it shows fresco's landmarks construction and two selection criteria: barycentre and resemblance. The experimental results yield optimal threshold values for the above mentioned criteria, leading to the development of(More)
Autonomous mobile robot navigation systems are based on three principal kinds of techniques: map-based navigation, map-building-based navigation and mapless navigation. We propose a method for symbolic trajectory description in unknown indoor environments. The chosen form uses a panoramic description called fresco. The method uses distance measurements from(More)
Autonomous mobile robot navigation systems are based on three principal kinds of techniques: map-based navigation, map-building-based navigation and mapless navigation. We propose a mapless method for trajectory description in unknown indoor environments. The method uses distance measurements from a 2D laser range finder, digitises the robot's visibility(More)
— This work aims at modeling a system which allows a user and more particulary a disabled person, to give a mission to a team of robots and to determine the whole process leading to its execution. This paper proposes a participative model to set up this system. We separate the actor: active element subjected to the stimulus (the user and its request, for(More)
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