Günter Dörfel

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Due to the fact that Röntgen never reported the details of the discovery of his "new rays", he left the door open for speculative interpretations. As a contribution to a serious analysis of the history of Röntgen's discovery, this paper presents a previously unnoticed letter relating to an order of a number of very thin crystalline absorbers. The addressee(More)
From 1953 to 1978 3439 patients suffering from bronchial carcinoma underwent operation. Due to the changing conditions of mass X-ray early detection of lung cancer decreased. This was followed by a declining number of operations but also by an increase in pneumonectomies (1974 to 1978). The average number of exploratory thoracotomies amounts now to 14% with(More)
When moving a vertical black and white bar pattern horizontally across a T.V. screen there appears to exist a slant of the pattern depending on movement velocity. Subjects were asked to compensate this geometrical distortion by adjusting a potentiometer. Results show a clear difference between theoretical and actual data where apparent slant of the vertical(More)