Forward kinematics of the general triple-arm robot using a distance-based formulation

Distance-based formulations have successfully been used to obt ain closure polynomials for planar mechanisms without relying, in most cases, on variab le eliminations. The methods re- sulting from previous attempts to generalize these techniques t o spatial mechanisms exhibit some limitations such as the impossibility of incorporating orient ation constraints. For the first time, this paper presents a complete satisfactory generalization. As an e xample, it is applied to obtain a clo- sure polynomial for the the general triple-arm parallel robot (that is , the 3-RP S 3-DOF robot). This polynomial, not linked to any particular reference frame, is obtai ned without variable eliminations or tangent-half-angle substitutions

Les rapports squelettiques et la compensation dento-alvéolaire

L'étude des téléradiographies et des moulages d'une population d'Europe Centrale comportant 2275 individus conduit l'auteur à établir une classification des rapports squelettiques, en tenant compte des compensations dento-alvéolaires. Cette architecture dento-alvéolaire, c'est-à-dire la forme et l'inclinaison du plan d'occlusion, ainsi que l'angulation du groupe incisivo-canin, est toujours liée au type squelettique de l'individu

Business to business end-of-life IT industrial networks

Business-to-business waste electrical and electronic equipment systems are not reported under current EuropeanUnion regulations. This paper examines the independent, unreported, industrial networks for the collection andtreatment of such waste in the UK, Austria, Germany, Romania and Spain. Methods used are semi-structuredinterviews and surveys of relevant literature. The results show that treatment options are highly driven by the endmarket for the resulting product. Reuse rarely occurs in Austria and Spain, but is common in the UK and prevalent inGermany. The flow of equipment through different recovery/disposal routes cannot be estimated. It is concluded that a solution needs to be developed to avoid negative sustainability impacts, but which does not place such a burden on the industry that it makes the practice unattractive

Business to business end-of-life IT industrial networks

Business-to-business waste electrical and electronic equipment systems are not reported under current EuropeanUnion regulations. This paper examines the independent, unreported, industrial networks for the collection andtreatment of such waste in the UK, Austria, Germany, Romania and Spain. Methods used are semi-structuredinterviews and surveys of relevant literature. The results show that treatment options are highly driven by the endmarket for the resulting product. Reuse rarely occurs in Austria and Spain, but is common in the UK and prevalent inGermany. The flow of equipment through different recovery/disposal routes cannot be estimated. It is concluded that a solution needs to be developed to avoid negative sustainability impacts, but which does not place such a burden on the industry that it makes the practice unattractive