A brief biography of Kurt Semm, the pioneer of laparoscopic appendectomy and inventor of various laparoscopic instruments are done, with special reference to his struggle to establish the foundation of minimally invasive surgery amongst his contemporary surgeons.

INTRODUCTION In periapical surgery, the absence of standardization between different studies makes it difficult to compare the outcomes. OBJECTIVE To compare the healing classification of different authors and evaluate the prognostic criteria of periapical surgery at 12 months. MATERIAL AND METHODS 278 patients (101 men and 177 women) with a mean age of 38.1 years (range 11 to 77) treated w...

Multicellular Developmental Model Kurt Fleischer Previous address: California Institute of Technology, MS 350-74, Pasadena, CA, USA, 91125 Current address: Pixar Animation Studios, 1001 W. Cutting Blvd #200, Richmond, CA, USA, 94804 e-mail: kurt@pixar.com c Kurt Fleischer, 1996. Abstract This paper reports recent simulation experiments that probe the capabilities of a particular multicellular d...

Twenty years ago, in his Principles of Gestalt Psychology, Kurt Koffka posed the problem of visual perception in the succinct question, "Why do things look as they do?" He took issue with the usual answer that things look as they do because of our past experience with them, arguing that an empiristic theory not only failed to account for many of the facts of visual perception, but, in addition,...

The objective of this descriptive, cross-sectional study was to analyze the driving and hindering forces for team work at a Material and Sterilization Center (MSC) of a teaching hospital, through an approximation of Kurt Lewin's Field Theory,in Goiânia, Goiás. Participants were 35 professionals, who answered a self-administered questionnaire based on the referred theory, which establishes that ...