Abstract not available

<p>Many English teachers see British English as the standard variety and teach this variety in the classroom. Their students are, however, also exposed to a great deal of American English in today’s media. As a result, there are a lot of students who use a mixture of these varieties because of the double input, both from media and from the teachers in school. In this paper, I interviewed teachers from Swedish secondary and upper secondary schools to find out what their attitudes towards British and American English were and whether these attitudes were reflected in their teaching. I also examined whether the teachers actually spoke the variety of English they thought they did as well as what their views were on students using a mixture of varieties. The focus of this essay will be on American English and British English.</p>

Strawbreaker foot-rot is a major limiting factor to cost efficient winter wheat production in the Pacific Northwest. Development of resistant cultivars has been hindered by the lack of adequate levels of genetic resistance and screening techniques which can consistently detect desired genotypes. Studies were conducted to determine if the reported strawbreaker foot-rot resistance of the cultivar "Rendezvous" is effective on isolates of Pseudocercosporella herpotrichoides found in the Pacific Northwest. Protected, naturally infected and artificially inoculated treatments were employed to determine the level of resistance of 10 cultivars including Rendezvous. Different concentrations of inoculum and stages of development were also used to determine if observations on leaf sheath penetration of seedlings obtained in the greenhouse were related to disease severity index readings taken in the field for selected cultivars. In addition, the nature of inheritance of strawbreaker foot-rot was studied in two crosses involving Rendezvous. Experiments were conducted at three locations and over two years at one location. Despite cultivar x treatment interaction, consistent levels of infection were observed in all experiments at each location. Significant differences were found for treatments and cultivars for most attributes. Yield losses, including the components of yield spikes per square meter, 1000 kernel weight, and kernel number per spike were proportional to the severity of the disease. Losses were greater when lodging occurred, which was also associated with disease severity. However, even in the absence of lodging losses were recorded in the naturally and artificially inoculated plots. Traits measured involving Rendezvous and Vpm/Mos 95//*2Hill were only slightly influenced by the treatments. Under greenhouse conditions, it was possible to distinguish the level of resistance of Rendezvous from susceptible cultivars at concentrations of 100 spores/ml, two weeks after inoculation at the seedling stage. Leaf sheath penetration of seedlings was found to be closely associated with the disease severity index obtained under field conditions. Generation means analysis performed in crosses involving Rendezvous indicated that additive and additive x additive gene action were responsible for most of the genetic variability associated with resistance. Narrow-sense heritability estimates also confirmed these fmdings. It would appear that Rendezvous has at least two major genes for resistance to strawbreaker foot-rot. / Graduation date: 1992

Thesis (Ph. D.)--University of Missouri-Columbia, 1999. / Typescript. Vita. Includes bibliographical references. Also available on the Internet.

Thesis (Ph. D.)--University of Texas at Austin, 2001. / Vita. Includes bibliographical references. Available also from UMI/Dissertation Abstracts International.

Thesis (Ph. D.)--University of Missouri-Columbia, 1999. / Typescript. Vita. Includes bibliographical references. Also available on the Internet.

Thesis (Ph. D.)--University of Texas at Austin, 2001. / Vita. Includes bibliographical references (leaves 106-107). Available also in a digital version from Dissertation Abstracts.

Bott-Samelson varieties associated to reductive algebraic groups are much studied in representation theory and algebraic geometry. They not only provide resolutions of singularities for Schubert varieties but also have interesting geometric properties of their own. A distinguished feature of Bott-Samelson varieties is that they admit natural affine coordinate charts, which allow explicit computations of geometric quantities in coordinates. Poisson geometry dates back to 19th century mechanics, and the more recent theory of quantum groups provides a large class of Poisson structures associated to reductive algebraic groups. A holomorphic Poisson structure Π on Bott-Samelson varieties associated to complex semisimple Lie groups, referred to as the standard Poisson structure on Bott-Samelson varieties in this thesis, was introduced and studied by J. H. Lu. In particular, it was shown by Lu that the Poisson structure Π was algebraic and gave rise to an iterated Poisson polynomial algebra associated to each affine chart of the Bott-Samelson variety. The formula by Lu, however, was in terms of certain holomorphic vector fields on the Bott-Samelson variety, and it is much desirable to have explicit formulas for these vector fields in coordinates. In this thesis, the holomorphic vector fields in Lu’s formula for the Poisson structure Π were computed explicitly in coordinates in every affine chart of the Bott-Samelson variety, resulting in an explicit formula for the Poisson structure Π in coordinates. The formula revealed the explicit relations between the Poisson structure and the root system and the structure constants of the underlying Lie algebra in any basis. Using a Chevalley basis, it was shown that the Poisson structure restricted to every affine chart of the Bott-Samelson variety was defined over the integers. Consequently, one obtained a large class of iterated Poisson polynomial algebras over any field, and in particular, over fields of positive characteristic. Concrete examples were given at the end of the thesis. / published_or_final_version / Mathematics / Master / Master of Philosophy

This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.

This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.