Master of Science

Tests were conducted in the Lubrication Laboratory of the Virginia Polytechnic Institute to study the effect of several metals on the deterioration of steam-turbine oils. A special test apparatus was constructed and three commercial turbine oils were tested in the presence of 14 different metal and metal combination. Included in this group of metals were five bearing metals, several metals now extensively used in turbine lubricating systems, and several metals that are not at present used in turbine oiling systems. Oxidation of the oils was accomplished by heating the oil in glass containers at 275°F for 200 hours, in the presence of the metals. The oil samples were then subjected to laboratory inspections to determine the extent of oxidation. It was found that in the case of oil A copper, lead and the copper-lead combination were increasingly effective in increasing the viscosity and acidity. Brass, copper, and copper-lead were increasingly effective in promoting sludge formation. With oil B copper, lead, and the copper-lead combination were increasingly effective in promoting sludge formation and increasing the viscosity. Steel, lead and the copper-lead combination were increasingly effective in producing acidity. Copper, metal No. 9, and the copper-lead combination were increasingly effective in increasing the viscosity of oil C. Copper, metal Ho. 5, and copper-lead produced acidity in increasing amounts. Aluminum, zinc, and cooper were increasingly effective in promoting sludge formation. Tin showed the least effect on solidity in the case of all three oil. It caused the lowest sludge formation with oils A and B and was low with oil C. The viscosity of oil A was least affected by metal No. 6, of oil B by metal No. 8, end of oil C by steel. / Master of Science

Master of Science

Master of Science

Master of Science

Master of Science

In recent years, both the state and federal governments of the United States have at last recognized erosion as a serious problem affecting the people of this land socially and economically, just as it affected the people of those kingdoms now buried in the sands of the deserts. Because of the seriousness of the problem, studies are being instituted on larger scopes than ever before and there is a greater realization of the pressing need for more adequate information about erosion, its causes, effects, prevention, and other related factors. That intense rainstorms result in higher rates of runoff is an acknowledged fact. These rates of runoff play an important part in studies made by soil conservationists, and upon their studies will depend the same success or failure of conservation practices. Soil conservationists have already espied the need for planning projects or designs that will take care of maximum runoffs which are to be expected at definite frequencies. The United States Geological Survey has collected records and made investigations of great value to engineers of navigation and flood control projects, as well as power developments and other such works which interest students of hydrology and soil conservation. Moreover, experiment stations in practically every state are cooperating with soil conservationists and soil specialists in attacking erosion problems facing the nation. The goal of all these investigations is towards finding means by which to help Nature in keeping the land so clothes that erosion may be kept within the natural limits. Hence, work is being conducted on many various problems. One particular problem upon which more information is needed is that runoff, its causes and effects in the Limestone Valley and Uplands Region in the State of Virginia. With the idea of making some contribution, therefore, that may help effect a solution by making available data for the above region, this problem was chosen as a subject for a Master’s thesis. / Master of Science

Québec Université Laval, Bibliothèque 2018

Héritière d'un mode de vie désormais considéré comme folklorique et marquée d'une profonde cicatrice symbolique laissée par son passage du monde ouvrier au monde bourgeois, la narratrice des récits d'Annie Emaux témoigne d'événements personnels, sociaux et historiques qui auront bouleversé sa vie. Récit de soi, autofiction ou document sociologique, les critiques ne s'entendent pas sur l'espace que devrait occuper l'oeuvre d'Annie Ernaux au sein de la littérature contemporaine. Délaissant le champ de l'analyse de contenu pour s'intéresser à la forme des récits, la présente étude se propose d'établir une syntaxe du texte permettant d'aborder l'œuvre sous le jour de ses composantes structurelles les plus signifiantes. Notre corpus sera composé de La place, Une femme, Passion simple, Journal du dehors, « Je ne suis pas sortie de ma nuit », La honte et L'événement. Cet ensemble présente, au plan de la forme, une continuité qui permet de retracer les correspondances entre écriture et récit, signifiant signifié, parole et histoire. Pour ce faire, plusieurs théories littéraires seront mises à contribution : la narratologie et la théorie de l'énonciation permettront d'abord de saisir la densité présente dans chacun des deux espaces textuels que nous définirons au premier chapitre; une fois le texte ainsi schématisé, il nous sera possible d'y poser un regard plus englobant en définissant certains effets de lecture entraînés par les particularités narratives étudiées. Nous replacerons finalement l'œuvre dans son contexte historique à l'aide du concept de vision du monde de Goldmann.

Québec Université Laval, Bibliothèque 2018