[en] 53 cranial computed tomographic scans were performed and the contribution of this new radiographic method is emphasized to ophthalmologic diagnosis, especially to the differential diagnosis of proptoses and orbital lesions. Computerized tomography is a noninvasive method easily tolerated by patients. Rapid diagnosis and exclusion of pathological processes shorten. The duration of the hospital treatment of patients. (author)

[en] This paper presents an improved multi-variable, probabilistic method for the safety analysis of power grounding systems. The application of this method is demonstrated in four examples. The first three examples illustrate the practical evaluation of one new and two existing substation grounding grids, when the substation is connected to an overhead distribution system. The fourth example ascertains the relative impact of a difference between the S curve of IEC Publication 479 and Dalziel's equation for the allowable body current used in ANSI/IEEE Std 80-1986 upon the validity of an exposure model based on the requirements of Std 80. In this example the statistical data on ground faults have been taken from actual system records. Further possible refinements of the exposure model are also discussed