Search
Now showing items 23021-23030 of 23030
Lawrence, Leavis and culture
(1974)
The explanatory power of Chomsky's transformational generative grammar
(1974)
One of the main difficulties in Chomsky's account of generative grammars and linguistic theories is to determine what exactly these grammars and theories explain. In some places Chomsky seems to be saying that they explain ...
A technique for obtaining the electrocardiogram of fish
(1973-02-01)
1. A method is described which enables the electrocardiogram of a fish to be studied over extended periods using chronically implanted electrodes. 2.2. This method has been used successfully for studies on restrained and ...
Waveguide electro-optic modulation in II-VI compounds
(1973)
Electro-optic intensity modulation is demonstrated in three-dimensional (channel) waveguides fabricated by diffusion techniques in ZnSe and CdS. Typical diffused guide dimensions are 1.6 μm × 19 μm × 2 mm. Two electrode ...
Photoluminescence determinations of Cd diffusion in ZnSe
(1973)
The diffusion constant D(T) of cadmium into single-crystal zinc selenide was measured using a photoluminescence/etch technique. Diffusions were performed in sealed ampoules using cadmium metal and cadmium selenide powder ...
Infection of protoplasts from yeast with tobacco mosaic virus
(1972-12-22)
PROTOPLASTS from higher plant cells can become infected with plant viruses under special conditions, and it has been shown that yeast cells can become infected with viruses normally found in different fungal genera . We ...
Optical waveguides by diffusion in II-VI compounds
(1972)
Planar optical waveguides have been made by sealed ampoule diffusion of Cd and Se into ZnS and Cd into ZnSe. Three-dimensional diffused guides of Cd-diffused ZnSe have been made by using a masking layer of evaporated ...
Fabrication of single-crystal semiconductor optical waveguides by solid-state diffusion
(1972)
Optical surface waveguides have been fabricated by diffusing selenium into single-crystal CdS substrates to produce graded-composition CdS Se crystals. Planar guides which confine a beam in one dimension and guides produced ...
Fluorescence of graded-band-gap CdSxSe1-x crystals produced by diffusion
(1972)
The fluorescence of CdSxSe1-x mixed crystals with band-gap gradients as large as 1200 eV/cm has been investigated at 77°K. The graded samples were produced by heating CdSe or CdSxSe1-x platelets in a sulfur-selenium ...