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We have examined the electronic properties of intrinsic amorphous silicon films as a function of deposition rate, and compared these with the performance of companion solar cell p-i-n devices. The device efficiency in the light-soaked state was strongly inversely correlated with growth rate. Film properties were evaluated in both the as-grown and light soaked states using drive-level capacitance profiling and transient photocapacitance spectroscopy. Although deep defect densities measured by drive-level capacitance profiling did not vary significantly between samples, the magnitude of the defect band deduced via transient photocapacitance spectroscopy was well correlated with device performance. Possible reasons for this discrepancy are discussed. Urbach energies were also correlated with film growth rate.
Total en bloc removal is the ideal surgical treatment for glomus jugulare tumours. Efforts to accomplish this have been made periodically since shortly after this tumour was first identified in the early 1940s. A method of removal using a combined approach through the neck and temporal bone is described here. This method is preceded by pre-operative irradiation therapy and on occasion by embolization. The early results obtained using this method in 19 patients are reported.
Dr. Clouston explained that he was the spokesman of Drs. Middlemass and Robertson, who had made almost all the sections and had supervised the micro-photography. He explained that as yet micro-photography had many disadvantages owing to the very delicate structure of the brain and the high powers that had to be used, as well as the difficulty in photographing many of the aniline stains. In the case of some of the sections more than six slides had been made before a satisfactory photograph was got.
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