No description available.

No description available.

No description available.

No description available.

No description available.

Ce mémoire a pour sujet d’étude Le surréalisme et la peinture d’André Breton. Nous cherchons à montrer de quelle manière Breton redéfinit le mouvement surréaliste à la lumière des arts visuels. Nous avons pour postulat qu’il s’agit du texte central de Breton pour comprendre la peinture surréaliste, et qu’il pourrait même s’agir là d’un manifeste de la peinture surréaliste. Nous étudions de quelle manière Breton s’inscrit dans une lignée d’écrivains qui abordent les arts visuels dans leurs textes, et qu’il fait cela tout en se détachant des critiques d’art de son époque. Nous croyons que Le surréalisme et la peinture est un texte qui allie à la fois un discours critique et poétique. De plus, en nous penchant sur d’autres textes sur l’art de Breton, nous montrons l’évolution de ses idées sur les arts visuels. Nous nous penchons aussi sur des concepts comme le modèle intérieur et l’automatisme pour comprendre avec quels paramètres Breton tente de définir la peinture surréaliste.

M.S.

The purpose of this study was to develop a sewing method which could be used in home sewing to reduce seam puckering and to see how well a group of home sewers could use the method to reduce pucker. The hypothesis tested was that use of the method by home sewers would produce no reduction in the amount of pucker in a lengthwise seam. The sewing method included the following factors: controlling the upper and lower tensions, needle size, stitch length, pinning, holding the fabric plys as they passed through the machine, and pressing. Each subject (home sewer) first sewed seams without using the sewing method, and then used the method to complete more seams. The sets of seams were presented to a panel of judges for comparison, and their responses were statistically analyzed through use of a computer program. Duncan's multiple range test was used to group the results. The analysis indicated that it was possible to reject the hypothesis for nearly all of the subjects. It was observed that subjects who had the greatest amount of sewing experience apparently were able to use the method with more success than those with less experience. It was not possible to ascertain definite differences in the performance patterns of the high school girls who participated in the experiment and the adult women. The method did not show as strong an effect on seams sewn with nylon thread as it did on those sewn with cotton thread. It is possible that the age and condition of some of the sewing machines also affected the amount of pucker in the seam. / M.S.

The theory proposed in this thesis is an attempt to bridge the gap that exists between the linear and nonlinear theories of Elasticity. The theory is applied to the solution of a hubbed, clamped, circular plate made of polyurethane whose hub is subjected to a "large" axi~symmetrioc twist. This particular problem is attacked in the conventional manner of the generalized plane stress problem of linear elasticity. However, the strain displacement relations are formulated in the Eulerian manner and the displacement gradients are not assumed to be small. In addition, a more general stress~strain relationship than the conventional Hookean form is assumed. The solution is checked by experiment; and in addition, three auxiliary problems; the uniaxial compression problem, the uniaxial tension problem, and a shear problem are checked experimentally to further cheek the validity of the proposed theory when applied to the finite strain response of polyurethane. / Ph. D.

This study was undertaken to investigate the mineral nutrition of aquatic Hyphomycetes by determining the mineral requirements of several species. On the basis of rapidity and renroducibility of growth, four species were selected, These were Heliscus lugdunensis Webster (Nectria lugdunensis webster), Flagellospora penicillioides Ingold (Nectria penicillioides Ranzoni), Clavariopsis aquatica DeWildeman, and Lunulospora curvula Ingold. These were grown in liquid culture on a rotary shaker at constant temperature. The containers and other equipment were cleaned by acid washing. When necessary to establish a nutritional reguirement for an element, the nutrient salts were purified by the phosphate adsorption and dithizone methods. In addition to nutrient salts and purified water, the media contained only glucose. Since all the species except Clavariopsis aquatica DeWildeman grew well for many transfers and approximately two years on this completely defined medium, without vitamins or amino acids being provided, it is concluded that they do not require these nutrients. Whether an element was required, and in what concentration, was decided on the basis of the amounts of growth obtained with various concentrations of the element in the initial media. Growth was measured as the dry weight of the mycelium from 100 ml of medium and the values from four replicates were averaged. Phosphorus, calcium, nitrogen, zinc, iron, magnesium, and sulfur requirements were demonstrated for all four species. Efforts to demonstrate requirements for potassium were unsuccessful. Manganese toxicity was demonstrated for Clavariopsis aquatica DeWildeman and a manganese requirement was suggested for Flagellospora penicillioides Ingold (Nectria penicillioides Ranzoni). The results suggested a molybdenum requirement for Heliscus lugdunensis Webster (Neetria lugdunensis Webster) and Lunulospora curvula Ingold, a boron requirement for H. lugdunensis and toxicity for C. aquatica, and a copper requirement for F. penicillioides. Approximately 0.50, 0.25, 0.50-1.00, and 0,.05-0.10 milli-moles per liter of phosphate were required to obtain maximum dry weight yields of Heliscus lugdunensis Webster (Nectria lugdunensis Webster), Flagellospora penicillioides Ingold (Nectria penicillioides Ranzoni), Clavariopsis aguatica DeWildeman, and Lunulospora curvula Ingold respectively. Calcium concentrations of 7.5, 50, 7.5, and 25 milli-moles per liter supported maximum growth of these species in the same order. All four were able to utilize ammonium nitrogen, nitrate nitrogen, or ammonium nitrate to produce about the same amounts of growth. C. aquatica was apparently able to use nitrate nitrogen only in the presence of an unidentified nutrient and this is interpreted as indicating a role for that nutrient in the nitrate metabolism of this species. Fifteen milli-equivalents per liter of ammonium nitrate, ammonium, or nitrate nitrogen was adequate to obtain maximum dry weight yields of H. lugdunensis. Five milli-equivalents per liter of ammonium nitrate, 15 of ammonium, and 35 of nitrate nitrogen supported maximum growth of F. penicillioides. As little as 5 milli-equivalents per liter of ammonium nitrate or ammonium nitrogen was optimal for C. aguatica and 5 milli-equivalents per liter of any of the three nitrogen sources was optimal for L. curvula. The optimal nitrate concentration for C. aquatica was not determined. There is an obvious advantage to a single medium on which a great number and wide variety of species may be grown. The author is of the opinion that a far greater advantage lies in the use of a completely defined medium on which one or more organisms may be reproducibly grown, Such media are suggested and their employment is strongly urged. Only in this manner can considerable morphological and physiological variations be avoided. / Ph. D.