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A rigorous proof for the existence of the second law of thermodynamics added as an appendix because of the distracting complexity of the mathematical developments. Again, this is not usually included in standard monographs.

Resume Le changement d'une prothese totale du genou est une entreprise difficile. L'analyse de la cause d'echec est un element important a prendre en consideration pour ne pas repeter deux fois la meme erreur. Il faut insister sur l'importance du planning qui doit suivre une check-list reprenant point par point les elements cliniques et radiographiques. Le but de l'intervention est de restaurer un genou stable, realigne et mobile. La realisation pratique peut repondre a plusieurs strategies. Le recours a des trous de meche precedant l'ablation des implants est une methode fiable pour restaurer l'interligne. La reconstruction des extremites osseuses ou « equilibrage osseux », en prenant comme reference le tibia, nous parait etre le meilleur postulat de depart. L'espace femoral posterieur, puis l'espace femoral distal sont alors restaures successivement. Cependant, l'ascension de l'interligne est parfois rendu necessaire pour equilibrer certains genoux raides. Une prothese a glissement, posterostabilisee, munie d'extensions modulaires, permet de repondre a la plupart des situations. Toutefois, l'existence d'une laxite asymetrique doit conduire a utiliser un implant de contrainte superieure.

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Publisher Summary This chapter provides some guidelines for group therapists. Psychodynamic group psychotherapy works on the basis of two major premises: individuals present themselves, complete with strengths and weaknesses, in a group in fundamentally the same ways as they live out their lives; and the various behaviors that occur within groups are interconnected via group associations and group contagion. The role of the group therapist is to help patients understand themselves by understanding their interactions in their therapy group. A major problem that confronts group therapists, perhaps uniquely, is the difficult task of selecting the most useful data from the massive amount of data that is generated by a therapy group. A major reason why there is a paucity of literature on this matter is that the process of a therapy group is entirely too unpredictable to allow for stereotypic “rules” for leaders to follow.

The view that ‘development’ is a diffusion process is still a deeply entrenched orthodoxy among transport planners. According to this view, the developed world has what the underdeveloped world wants, and anything that increases the contact between the two will assist the transfer of attitudes, skills and capital necessary to bring the latter up to the level of the former (Adams 1981:ix).