Light shield and cooling apparatus

A light shield and cooling apparatus was developed for a high intensity ultraviolet lamp including water and high pressure air for cooling and additional apparatus for shielding the light and suppressing the high pressure air noise

Product Focus versus Diversification: Estimates of X-Efficiency for the US Life Insurance Industry

Using data for the life insurance industry during 1990-1995, we empirically test for a relationship between a firm's output choice and measures of X-efficiency. Our empirical evidence suggests that diversification across multiple insurance and investment product lines resulted in greater X-efficiency than a more focused production strategy. The analysis in this article is consistent with the proposition that managers of multiproduct firms are able to achieve greater cost efficiencies than their counterparts in more focused firms by sharing inputs and efficiently allocating resources across product lines in response to changing industry conditions. Our findings are important since they justify the existence of multiproduct firms in the absence of cost complementarities and identify product diversification as a source of efficiency in the life insurance industry that should be recognized by managers, policyholders, and regulators.

A preliminary study of ester oxidation on an aluminum surface using chemiluminescence

The oxidation characteristics of a pure ester (trimethyolpropane triheptanoate) were studied by using a chemiluminescence technique. Tests were run in a thin-film micro-oxidation apparatus with an aluminum alloy catalyst. Conditions included a pure oxygen atmosphere and a temperature range of 176 to 206 C. Results indicated that oxidation of the ester (containing 10 to the minus 3 power M diphenylanthracene as an intensifier) was accompanied by emission of light. The maximum intensity of light emission (I sub max) was a function of the amount of ester, the concentration of intensifier, and the test temperature. The induction period or the time to reach one-half of maximum intensity (t sub 1/2) was an inverse function of test temperature. Decreases in light emission at the later stages of a test were caused by depletion of the intensifier

The Interactions Between Nitrogen and Oxygen Molecules

Lippincott's delta-function model for atomic interactions is analyzed, both physically and mathematically, and extended, by differentiation between K- and L-shell electrons and the introduction of a variable parameter in the expression for the delta-function strength, to cover homonuclear molecules more complex than hydrogen. In addition, modifications are made which allow treatments of diatomic, heteronuclear molecules. This theory, in conjunction with a reasonably extensive study of resonance, dispersion, and configuration interaction phenomena, as well as the use of simple quantum mechanical arguments, is then applied to the N2-N2, N2-O2, and O2-O2 interactions

Project Home Evaluation: Final Report

Evaluates a New York State Department of Health-funded project to help nursing home patients move home or into community-based settings through discharge planning services, training, and education. Examines differentiating factors such as Medicaid status

Analysis of Natural Fractures and Borehole Ellipticity Travis Peak Formation East Texas

This report summarizes petrographic studies of natural and coring-induced fractures in 7 cores from the Travis Peak Formation, a low-permeability gas sandstone in East Texas, and also presents an analysis of fracturing and wellbore elongation based on Borehole Televiewer, Formation Microscanner, and Ellipticity logs from 12 Travis Peak wells. Natural, vertical extension fractures in sandstone are open or only partly mineral-filled in the cored depth range (approximately -5,000 to -10,000 ft), and they are therefore potential gas reservoirs as well as a potentially important influence on commercial hydraulic fracture treatment. Crack-seal structure in fracture-filling quartz shows that fracturing and quartz cementation were contemporary; this result, together with evidence of timing of fracturing and the large water volumes that are inferred to have passed through the Travis Peak, suggests that natural hydraulic fracturing influenced fracture development. Healed transgranular microfractures that occur in sandstone can be used to ascertain natural fracture trends in core that lacks macrofractures, and coring-induced petal-centerline fractures can be used to infer stress orientations. Fractures trend ENE to E. In the upper Travis Peak, borehole ellipticity trends ENE, parallel to fracture trends, and in the lower Travis Peak ellipticity trends NNW, parallel to the direction of least horizontal stress.Bureau of Economic Geolog