Solar energy, its conversion and utilization

The work being carried out at the University of Florida Solar Energy and Energy Conversion Laboratory in converting solar energy, our only income, into other needed and useful forms of energy is described. A treatment such as this demonstrates, in proper perspective, how solar energy can benefit mankind with its many problems of shortages and pollution. Descriptions were given of the conversion processes, equipment, and performance. The testing of materials, solar water heating, space heating, cooking and baking, solar distillation, refrigeration and air-conditioning, work with the solar furnace, conversion to mechanical power, hot air engines, solar-heated sewage digestion, conversion to electricity, and other devices will be discussed

A Mathematical Model for Defining Explosive Yield and Mixing Probabilities of Liquid Propellants

This paper describes how a mathematical model can be constructed to fit theoretical or experimental data on yield and spill of liquid propellants. It shows how these primary quantities can be separated, how probability distributions can be found for each, and how probability confidence regions and confidence limits can be established. The fundamental function of this very general mathematical model, based upon four independent parameters, and the characteristics of the resulting probability surface are discussed in detail. The mathematical model, programmed for an IBM 709 computer, is applied to some spill test data of liquid propellants for which the necessary information is available and then with a minimum number of assumptions to missile failure yield estimates

Prediction of explosive yield and other characteristics of liquid propellant rocket explosions Final report

Explosive hazards and yield predictions for liquid rocket propellant

Characteristics of liquid rocket propellant explosion phenomena. Part 8, no. 448 - Prediction of explosive yield and other characteristics of liquid propellant rocket explosions

Prediction of yield and other characteristics of liquid propellant rocket explosion

Evidence for a Bulk Complex Order-Parameter in Y0.9Ca0.1Ba2Cu3O7-delta Thin Films

We have measured the penetration depth of overdoped Y0.9Ca0.1Ba2Cu3O7-delta (Ca-YBCO) thin films using two different methods. The change of the penetration depth as a function of temperature has been measured using the parallel plate resonator (PPR), while its absolute value was obtained from a quasi-optical transmission measurements. Both sets of measurements are compatible with an order parameter of the form: Delta*dx2-y2+i*delta*dxy, with Delta=14.5 +- 1.5 meV and delta=1.8 meV, indicating a finite gap at low temperature. Below 15 K the drop of the scattering rate of uncondensed carriers becomes steeper in contrast to a flattening observed for optimally doped YBCO films. This decrease supports our results on the penetration depth temperature dependence. The findings are in agreement with tunneling measurements on similar Ca-YBCO thin films.Comment: 11 pages, 4 figure

Free Trade and the Regulatory State: A GATTs-Eye View of the Dormant Commerce Clause

At one time, federalism may have seemed a peculiarly American institution. Today, however, we can see federalism as a special case of the more general problem of allocating power among geographic units. Problems of federalism arise in structures as large as the European Union\u27 and the even larger global trade system under the General Agreement on Tariffs and Trade ( GATT ). Free trade increasingly is accepted as a value internationally, as it always has been for commerce within the United States. Yet, both internationally and domestically, free trade must accommodate the reality of the modern regulatory state-a state that shows little tendency to wither away. Regulation often creates competitive disadvantages for foreign producers. Sometimes the disadvantage is intended, but sometimes it is a genuinely unwanted consequence of a domestic policy. Trade-restricting effects frequently occur even with facially nondiscriminatory regulations because the different geographic or market positions of foreign producers often make it more costly to comply with demanding regulations. For example, a rule mandating particular pollution controls for automobiles can force the foreign producer to set up a separate production operation in order to sell in that particular jurisdiction