Optimal space trajectory problems and the necessaly and sufficient conditions that define their solutions are stated most compactly in terms of position and velocity vectors. To obtain analytical or numerical solutions, however, the problems are expressed using a particular set of coordinates. Each set of coordinates has advantages and disadvantages depending on the application. Thus, it may be...

Past approaches to the self have emphasized people'^ desire for positive evaluations I suggest that this emphasis overlooks another powerful and important motive, the desire for evaluations that venfy self-views Among people with negative self-views, this desirt for self-venfication can override the desire for positive evaluations For example, people with negative self-views seek relationship p...

A review of the application of hyperthermia in the treatment of cancer is presented. The definition, historical background, biological rationale, indications and contraindications are discussed. The five basic methods of inducing hyperthermia as well as the five objective therapeutic modalities are reviewed. Hyperthermia for the treatment of cancer applied by extracorporeal circulation either a...