Faceting of high angle grain boundaries in SIGMA = 3 and SIGMA = 5 coincidence lattices of the fcc structure was studied using thinfilm bicrystal specimens of controlled geometry. A number of relatively high index boundaries in the coincidence lattices (containing relatively low planar densities of coincidence sites) was found to break up into low energy facets corresponding to low index planes of the coincidence lattices (containing high densities of coincidence lattice sites). These results are consistent with a general expectation that the grain boundary energy decreases as the planar density of coincidence sites increases, i.e., the two-dimensional periodicity of the boundary becomes shorter, and long-ranged distortions are reduced. (auth)

None

Experimental details of a novel method for recording optical images is presented. In this method, a photoconductive layer arranges electric charges according to the optical image projected onto it. The differential electric fields thus produced, squeeze a thermoplastic layer into ridges that constitute the final image. The interference of two laser beams (0.83 mu m) that formed an optical image of l000 cycles/mm was clearly and accurately recorded. The spatial frequency response differs from the conventional photographic method and is well suited for holograms. The image can be erased and the medium reused many times. The thermoplastic layer alone can be written on'' by charges applied by touching with a thin wire. (auth)

A live-in type workshop available for academic credit covering basic nuclear power generation and the tradeoffs and problems that exist between nuclear power and alternative means to generate electricity was held for 37 high- school teachers at the Madison campus for the University of Wisconsin. Significant improvements over last year's program included the distribution of a large amount of information and the distribution of two minicourse outlines on the subject of power and the environment entitled: The Environmental Impact of Electrical Power Generation: Nuclear and Fossil'' prepared by the Pennsylvania State Dept. of Education, and Science II Matter-Energy Interactions in Natural Systems'' prepared by Carl Pfeiffer of Monona Grove High School, Monona, Wisconsin. (MCW)

Long, continuous, cylindrical charges of high explosives are considered as alternatives to nuclear explosives or massive hydraulic fracturing for the stimulation of gas production in tight gas formations. The calculational method was that used previously for nuclear stimulation; it was verified by comparison of the calculated and observed gas production from Rulison. The calculations indicate that charges of high explosives 24 inches in diameter and 2000 feet in length (the height assumed for the gas-bearing sands) detonated in four wells per section would be comparable in cost and effectiveness to estimates for one well stimulated by three 100-kiloton nuclear explosions. Stimulation by high explosives would require special development of the explosives (probably with ammonium nitrate as the base) to be suitably sensitive, temperature-resistant, and compatible with the gas-reservoir rocks; the required work appears to be straightforward, however. Comparative field testing is required to determine the optimum method (chemical or nuclear explosives or hydraulic fracturing) for a given region and to confirm that gas can be produced profitably for between 25 nd 80 er Mcf. (auth)

None

None

This report addresses the research and ecology semiannual progress report from July through December 1972.

The radiation dose received by passengers during flight on conventional jet aircraft was determined as a function of exposure to cosmic radiation, solar radiation, flight time, and flight path. The dosimetric measurements were made with thermoluminescent dosimeters (TLD's) and with emulsions of three types sealed in plastic packets. These packets were sent by air mail back and forth from Berkeley, California to five cities and a dose sufficiently above background for a satisfactory measurement was accumulated by the TLD's on one round trip and by the emulsions on three round trips. It was concluded that both experiments and theory show that the total doses received at present day conventional jet aircraft altitudes are considerably higher than those encountered in supersonic flights at much higher altitudes, even though the dose rate is lower at these lower altitudes, when the longer time of exposure at the lower altitudes is taken into consideration. Computer programs used in the dose calculations are included. (CH)

None

This report is a bibliography of published materials concerning school finances from January to June of 1973.

This report documents the F-14 fighter aircraft and costs associated with its production, a summary of Congressional actions related to the program, and issues in the contract between the Navy and Grumman Aerospace Corporation.

None

This report discusses the functions of the Law Enforcement Assistance Administration (LEAA) and major topics of debate regarding those functions and its funding.

Report from The Imperial Sugar Company discussing cash balances and deposits on a completed business day with company names.