Une ville neuve du Sénégal : Thiès

Savonnet Georges. Une ville neuve du Sénégal : Thiès. In: Cahiers d'outre-mer. N° 33 - 9e année, Janvier-mars 1956. pp. 70-93

Scientific Collaborations: principles of WikiBridge Design

Semantic wikis, wikis enhanced with Semantic Web technologies, are appropriate systems for community-authored knowledge models. They are particularly suitable for scientific collaboration. This paper details the design principles ofWikiBridge, a semantic wiki.Comment: in Adrian Paschke, Albert Burger begin_of_the_skype_highlighting end_of_the_skype_highlighting, Andrea Splendiani, M. Scott Marshall, Paolo Romano: Proceedings of the 3rd International Workshop on Semantic Web Applications and Tools for the Life Sciences, Berlin,Germany, December 8-10, 201

A parametric model of the thigh-buttock complex for developing FE model to estimate seat pressure

5th International Digital Human Modeling Symposium, BONN, ALLEMAGNE, 26-/06/2017 - 28/06/2017Contact pressure on the seat surface is one of the most important factors to consider when assessing sitting discomfort (De Looze et al., 2003). Several finite element models of the thigh-buttock region have been developed to simulate user-seat interaction. However, the models predominantly match one specific body anthropometric type (often the 50th male per-centile in stature), meaning they cannot represent the large range of variation of sitters' population. The objective of this study was to develop a parametric model of the thigh-buttock region including both bones (pelvis and femur) and outer skin of varying ranges of anthropometry. Thirty-six participants (19 males, 17 females) of varying weight (healthy BMI, obese BMI) and stature (small, average height and tall) were recruited for this study. Using a VICON optoelectronic system, 8 pelvis anatomical landmarks were palpated manually in a seated position. Participants were then scanned using a portable handheld laser scanner (Nikon, ModelMaker MMD x /MMC Handheld Scanner) in a position with a thigh-trunk angle of approximately 110°. The position was maintained by an adjustable kneeling structure so that both the torso and the thighs were not supported, making it more accessible to scan the back, buttocks and thighs. After having pre-processed the 3D scans, a principal component analysis was first performed on the coordinates of the surface mesh including anatomical landmarks. Then, a statistical linear regression was run on the retained PC scores with stature, BMI and pelvis-femur angle as predictors in order to obtain a statistical shape model (SSM). Regarding bone surfaces, the SSMs of femur and pelvis were obtained using previously collected CT scans of 54 bodies from the University Libre de Bruxelles, Belgium. The bony landmarks predicted by the SSM of external shape were used as the inputs of the SSM of bones surface. Bone surface estimation was assessed with the use of MRI images of one subject. The parametric model of thigh-buttock complex will be used to generate the meshes of the finite element models to be developed for simulating occupant/seat interaction for a large range of anthropometry