Thesis (M.A.)--Zhong guo wen hua xue yuan. / Reproduced from typescript. Bibliography: p. 123-128.

by Saul B. Gelfand and Sanjoy K. Mitter. / On cover "d̳" indicates superscript. Cover title. / Includes bibliographical references (leaf 35). / Research partially supported by the Air Force Office of Scientific Research. 89-0276 Research partially supported by the Army Research Office. DAAL03-86-K-0171

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Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.

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In the operation of combined heating and power plants, there are two serious threats to economy as measured by fuel consumption for the service rendered. These are loss or exhaust steam to the atmosphere and, less serious, exhaust or steam to a condenser. The greater part of the heat supplied to the steam in the form of latent heat by the boilers is lost in either case. Use of exhaust steam for heating makes available a maximum amount of heat to useful purpose and consequently shows decided economical advantages over systems wherein the heating and power supplies are separate. Still further economies are possible by operating units having the best possible economy characteristics at the particular load range in question at any time. As often happens when the electrical and exhaust steam requirements vary considerably, two dissimilar types of units must be installed to maintain satisfactory economy over the complete range of load demand on the plant. When the capacities of two such units are equal or overlap in some portion or the demand range, it is evident that there should be some load condition at which either or the units could be operated with equal economy; below which condition, one unit would show the better economy, and above which, the other unit would be more suitable. The Virginia Polytechnic Institute Heating and Power Plant has one back-pressure turbine and one condensing, bleeder-type turbines. Either of these units is capable of carrying the present electrical load. When, due to electrical load limitations, the low-pressure steam available is insufficient, the reducing valves installed enable either of the units to satisfactorily supply this low-pressure steam demand. However, at high electrical and low low-pressure demands, the back-pressure unit will discharge part of its exhaust steam to the atmosphere, while the condensing unit will discharge the excess supply, over and above the low-pressure demand, into the condenser. In the condenser, the circulating water removes the latent heat of the steam. The problem, then, is one of obtaining a quantitative comparison of the two machines throughout the range of seasonal variation of both electrical and low-pressure loads. The authors believe that the investigation will lead to fairly accurate results which, if used as a guide in operation, will aid considerably in preventing possible future fuel waste from the operation of the wrong unit for any particular set of conditions. / M.S.

Thesis (M.A.)--Indiana University, 2007. / Title from screen (viewed on Apr. 27, 2007) Department of English, Indiana University-Purdue University Indianapolis (IUPUI) Includes vita. Includes bibliographical references (leaves 83-85)

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Louis Vierne indicated his 24 Pices en style libre as being for organ or harmonium and he provided separate registrations for each instrument. Nevertheless, several organists and authors have noted a disparity in the work's success on the two different instruments. This study begins with a look into the development of the harmonium and a consideration of sorne important traits of standard harmonium literature as exemplified by Franck and Guilmant. An examination of Vierne's pieces from this harmonium perspective reveals several problems, mostly in the areas of compositional texture, the harmonium's air supply; and Vierne's harmonium registrations, which often point in opposite directions from his verbal indications in the score and his organ registrations. This study concludes that Vierne's 24 Pices are genuine organ music and that Vierne made little attempt to conform to the musical capabilities and constraints of the harmonium, even as he hoped that indicating the harmonium would increase the market appeal of this volume. / Louis Vierne indiqua que ses 24 Pices en style libre taient crites pour orgue ou pour harmonium, et il fournit des indications de registration pour les deux instruments. Toutefois, plusieurs organistes et auteurs ont not une disparit entre le succs de l'oeuvre sur l'un ou l'autre des instruments. Cette tude s'intresse tout d'abord l'histoire de l'harmonium ainsi qu' la littrature pour harmonium, telle qu'illustre dans certaines oeuvres de Franck et Guilmant. Une analyse des pices de Vierne, du point de vue de l'harmonium, rvle plusieurs problmes, notamment en ce qui concerne la texture musicale et le systme de vent de l'harmonium, ainsi que les registrations pour harmonium, qui souvent indiquent le contraire de ce qu'indiquent les instructions verbales et les registrations pour orgue. Cette tude conclut que les 24 Pices de Vierne constituent une musique d'orgue vritable, et que Vierne ne fit que peu d'efforts pour les adapter aux capacits et limitations de l'harmonium, en esprant que l'harmonium permettrait ce recueil de trouver un public plus large.