Constraints on the development of coal mining in arctic Alaska based on review of Eurasian arctic practices

Arctic Alaska's enormous reserves of coal may be a significant future source of energy for the United States and for the Pacific Basin. Large coal reserves have been developed in the Arctic portions of Eurasia, where problems similar to those that might be encountered in Alaska have already been faced. To determine the nature of these problems, the Mineral Industry Research Laboratory of the University of Alaska, under contracts S 0133057 with the U.S. Bureau of Mines, has conducted a literature review on Eurasian coal mining and visited mines in Svalbard, Norway; Carmacks, Y.T.; and Healy, Alaska. The purpose was to establish the most significant physical constraints which may apply to the eventual development of Northwestern Arctic Alaskan coal.Contract S 0133057 with the U.S. Bureau of Mine

Student use of psychiatric consultations in the Lowell mental hygeine unit 1950 to 1952

Thesis (M.S.)--Boston Universit

Effects of income and demographics on expenditures for whole, lowfat, and skim milk in the U.S.

This research was conducted in order to better understand and identify the demographic characteristics of markets for whole, lowfat, and skim milk in the United States. The cross sectional data used in this study was gathered by the U. S. Department of Agriculture (USDA) in their 1987- 88 National Food Consumption Survey (NFCS). The effects of income and other socioeconomic characteristics on the probability that a household will buy whole, lowfat, and skim milk were measured and compared. The probit model was used to examine these effects statistically. The results showed that distinct expenditure patterns do exist for the three types of fluid milk. Income before taxes tended to decrease the probability of expenditures for whole milk while having had a positive effect on skim milk. General nutritional information was found significant and tended to increase the probability of lowfat and skim milk expenditures. The level of formal education of the food manager also had a positive effect on the probability of expenditure of lowfat and skim milk. Increasing formal education along with nutritional awareness had negative effects on the probability of whole milk expenditure. These results have important implications for the dairy industry, health professionals, and policy makers. Potential target markets may be identified from these results for whole, lowfat, and skim milk

Suppression of Giant Magnetoresistance by a superconducting contact

We predict that current perpendicular to the plane (CPP) giant magnetoresistance (GMR) in a phase-coherent magnetic multilayer is suppressed when one of the contacts is superconducting. This is a consequence of a superconductivity-induced magneto-resistive (SMR) effect, whereby the conductance of the ferromagnetically aligned state is drastically reduced by superconductivity. To demonstrate this effect, we compute the GMR ratio of clean (Cu/Co)_nCu and (Cu/Co)_nPb multilayers, described by an ab-initio spd tight binding Hamiltonian. By analyzing a simpler model with two orbitals per site, we also show that the suppression survives in the presence of elastic scattering by impurities.Comment: 5 pages, 4 figures. Submitted to PR

DETERMINANTS OF WHOLESALE BEEF-CUT PRICES

Key determinants of monthly wholesale prices for 12 beef cuts include the quantity of the specific cut, stickiness in prices, marketing costs, quantities of pork and chicken, and seasonality. Seasonal patterns across the respective cuts are very different. Relative to the price in December, prices at the wholesale level in other months can be as much as 6 percent lower to as much as 21 percent higher.Wholesale prices, Beef cuts, Seasonality, Demand and Price Analysis, Livestock Production/Industries,

Calculation of the effects of ice on the backscatter of a ground plane

Described is a technique for examining the effect of a rough ice layer on the backscatter of a ground plane. The technique is applied to the special case of a rough ice layer that is periodic in space. By assuming that the roughness is periodic, the backscatter of the ground plane can be found from the backscatter of a single period. Backscatter calculations are presented for a single period in which the thickness of the ice layer has a Gaussian shape

Variations in Transport Derived from Satellite Altimeter Data over the Gulf Stream

Variations in total change of sea surface height (delta h) across the Gulf Stream are observed using Seasat radar altimeter data. The sea surface height is related to transport within the stream by a two layer model. Variations in delta h are compared with previously observed changes in transport found to increase with distance downstream. No such increase is apparent since the satellite transports show no significant dependence on distance. Though most discrepancies are less than 50 percent, a few cases differ by about 100 percent and more. Several possible reasons for these discrepancies are advanced, including geoid error, but only two oceanographic contributions to the variability are examined, namely, limitations in the two layer model and meanders in the current. It is concluded that some of the discrepancies could be explained as changes in the density structure not accounted for by the two layer model