Cholesteric liquid crystals (CLCs) are one dimensional photonic band-gap materials. Due to distributed feedback, low threshold mirrorless lasing can occur in dye-doped and pure CLCs. In order to… (More)

This paper discusses the statistical distribution of internal fields due to random defects in solids. It extends previous discussions by separating explicitly the contribution of the nearest defect… (More)

A general method has been developed for performing self-consistent calculations for shallow defects or defect complexes in semiconductors. Results are given here for donoracceptor pairs in GaP and a… (More)

We have investigated the existence, frequency and the course of arteries of the human stomach fundus by injection method. Our material obtained 52 human fetuses of the length range from 127 to 285 mm… (More)

The Crystal Ball detector at the DORIS II storage ring at DESY has been used to measure the branching ratios for the decay modes r* -+ h*‘lr’u and r* + h*r”rov, where h* is any charged hadron. The… (More)