Univ., Diss.--Utrecht, 2007.

No description available.

The energy crisis of 2001, high prices for gas and electricity and worries of climate change have caused a growing awareness about energy issues in California. The problems are clear. This paper looks at the next step of finding and implementing solutions. In this case the contribution that solar photovoltaic and solar thermal generation could make toward solving the problem. This paper looks at technological change, the current state of solar energy research, current government policies on solar energy, and finally makes policy recommendations to meet the stated problem.

The energy crisis of 2001, high prices for gas and electricity and worries of climate change have caused a growing awareness about energy issues in California. The problems are clear. This paper looks at the next step of finding and implementing solutions. In this case the contribution that solar photovoltaic and solar thermal generation could make toward solving the problem. This paper looks at technological change, the current state of solar energy research, current government policies on solar energy, and finally makes policy recommendations to meet the stated problem.

No description available.

A Sigma Pile was constructed to serve as a laboratory facility at V.P.I. Reproducible foil positions are possible with the positioning plates installed on the pile. Withdrawal of the two outer blocks in each foil channel is facilitated by a coupling mechanism. Five source positions permit operation with reduced harmonics. The neutron distribution in the pile was proven to be symmetric by horizontal and vertical traverses. By means of a diffusion length measurement, which gave an "L” of 54.5 ± 2 cm, and a Fermi Age measurement, which gave a "r” of 357 ± 5 cm², the parameters of the pile were shown to be in good agreement with published data on graphite. / Master of Science

Thesis. 1976. Ph.D.--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics. / Microfiche copy available in Archives and Barker. / Vita. / Includes bibliographical references. / by Roderick A. Hyde. / Ph.D.

Magíster en Análisis Sistémico Aplicado a la Sociedad / Se presenta en este informe de Tesis un análisis de las perspectivas de desarrollo de la Energía Solar observadas en el Solar Energy Research Center (SERC), en específico aquellas relacionadas con los ámbitos de Ciencia y Tecnología, Mercado y Políticas Públicas. Para ello, y a partir de metodologías cualitativas, se desarrollaron redes semánticas asociadas a cada ámbito señalado, indagando en las formas de procesamiento usadas por miembros del SERC para tratarlos. A partir de ello, se muestra el surgimiento de distintos niveles de complejidad en las formas de abordar el fenómeno y su incidencia en el proceso de estabilización de la Energía Solar en nuestro país, relevando el papel que el concepto de perspectiva tiene en la configuración del emergente campo solar en nuestro país

The development of technologies and structures providing energy for household use in South Africa have for many years been dominated by the needs of "white" households. While these needs have been comprehensively met through cheap and efficient energy supplies, the needs of those in the "homelands" and townships have effectively been ignored. Thus, for roughly two-thirds of the population in South Africa, the struggle to meet basic energy needs for cooking, water heating, space heating and lighting is time consuming and expensive. The planning of a national energy strategy for the future can no longer overlook the energy needs of underdeveloped areas. While the immense task of building institutions and techniques for providing all with adequate and affordable energy supplies will require substantial technical intervention and a large amount of capital, ignoring these problems will incur even greater political, social and environmental costs. Interest in the field of energy for underdeveloped areas has been increasing in recent years, and has led to research on various appropriate energy technologies and the highlighting of energy problems in various locations. However, there has been no overview of experience to date, nor any comparative assessment of these technologies and their potential role in an energy supply strategy. By drawing together the body of research into one publication, this thesis hopes to provide an overview, to allow different energy technologies and supply options to be assessed and compared, and to provide a starting point for debate on suitable energy strategies for underdeveloped areas.

Structure-property relationships were investigated for electron beam(EB) irradiated monomeric and polymeric systems. The objectives were to study the feasibility of preparing systems of potential application, and to characterize these systems in terms of structure-property behavior. In this thesis, the basic theories on radiation chemistry were first reviewed. Next, five different studies on the application of EB radiation were discussed. In the first study on the surface modification of the methacrylic acid derivative of the glycidyl ether of bis-phenol A(bis-GMA) substrates, considerable changes in wetting characteristics were observed using functionalized poly(dimethyl siloxane)(PDMS) oligomers as surface modifiers. Systematic studies were conducted to investigate the effects of the type of functionality, the molecular weight of PDMS and the radiation dosage, etc. The second subject was on the structure-property behavior of EB crosslinked caprolactone-allyl glycidyl ether(CL-AGE) copolymers. EB radiation was utilized to crosslink these materials at various temperatures both above and below the crystalline melting point. The final solid state properties were found to be strongly dependent on the morphological state of the CL-AGE copolymer at the time of EB irradiation. In the third study, models of time-temperature-energy(TTE) diagrams in an idealized EB radiation curing system were developed to help provide a conceptual understanding of the TTE relationship. Three general adiabatic cases were presented with increasing degree of complexity: the first considered only heating through EB energy dissipation, while the second and third attempted to include a kinetic exotherm, and the effects of glass transition and vitrification behavior, respectively. The fourth study focused on the effects of EB irradiation on the mechanical and thermal properties of poly(phenylene sulfide). The effects of morphological state and atmospheric environment such as air or nitrogen during the irradiation process were investigated in terms of structure—property behavior. In the fifth study, two systems(symmetric and asymmetric) based on the controlled distribution of bis-GMA within a crosslinked nitrile rubber(NBR) network were prepared utilizing EB irradiation. The prepared symmetric and asyrnronetric distributions of bis-GMA and the morphological structure of the NBR/bis-GMA system were investigated by dynamic mechanical as well as by FTIR and polarizing optical microscopy analyses. / Ph. D.