Typescript (photocopy). / Digitized by Kansas Correctional Industries

Typescript, etc. / Digitized by Kansas State University Libraries

We use high rate magnetically-confined-plasma-triode sputtering guns in a diffusion pumped vacuum chamber to fabricate metal-metal superlattices. By feedback control of the sputtering rates and microprocessor control of the substrate rotation the individual layer thicknesses were kept constant to within ±0.3% over the entire sample thickness ∼0.5 μm. We describe in detail the results of a number of structural characterization techniques applied to these materials, including Bragg Θ-2Θ x-ray diffraction, transmission and reflection Laue diffraction, wide film Debye-Scherrer diffraction, and Rutherford Backscattering Spectrometry (RBS). By depositing Ta onto freshly deposited Mo surfaces and using RBS to measure the resultant Ta coverage we determined the dependence of the Ta sticking coefficient on coverage. The same was done for Mo deposited on Ta surfaces. We grew a series of Mo/Ta superlattices with superlattice wavelengths covering the range from 10 to 120 Å. A number of four-wire resistance measuring patterns were etched in each superlattice using standard photolithographic techniques. Resistivities of the superlattice films of various layer thicknesses were then measured to a relative precision of 0.01% and an absolute accuracy of 1%. The layer thickness dependence and temperature coefficient of the resistivity of these superlattices was analyzed using grain and size effect theories.

published_or_final_version / Botany / Doctoral / Doctor of Philosophy

<p>Vårt huvudsakliga syfte är att söka kunskap om och fördjupa förståelsen för hur gymnasieelever med diagnosen Aspergers syndrom (AS) upplever sin skolgång. Vår konkreta frågeställning är att undersöka elevernas upplevelser av bemötandet från lärare genom en kvalitativ intervjustudie där 4 gymnasieelever med diagnosen AS har intervjuats. Den litteratur som använts har varit kopplad till skolan och Aspergers syndrom. Uppsatsen ger en överblick av tidigare forskning om Aspergers syndrom och hur undervisning av dessa elever kan läggas upp. Vårt resultat pekar på att det är nödvändigt att ta hänsyn till den enskilda Aspergers elevens behov. Det är även viktigt hur dessa elever blir bemötta. En lärare ska acceptera elever som de är och möta dem med empati, värme och respekt. Det är också väsentligt att ha en kännedom i hur man på ett medvetet sätt kan arbeta och bemöta elever med denna diagnos.</p>

The effect of increased egg consumption on plasma cholesterol levels and its distribution among lipoproteins and Apolipoprotein A-I/A-II ratios of high density lipoprotein subfractions in individuals who did and did not demonstrate response in plasma cholesterol levels was studied in 20 healthy middle-aged men (30-55 years of age) for three months. Lunch containing 3 eggs was fed all subjects during the first month classification period. Subsequently, subjects were divided into hyper and hyporesponders according to their blood cholesterol level. Thereafter, 6 eggs were fed to hypo (n=12) while hyper (n=8) continued to consume 3 eggs with lunch. The average plasma cholesterol level of the 20 subjects was increased from 185±34 to 195±34 mg/lOOml during the classification period. The mean plasma cholesterol level of the hyperresponders was significantly (p<0.025) increased from 170±42 to 199±40 mg/100ml during classification while that of the hyporesponders fell slightly. The additional 6 eggs consumed by the hyporesponders for 6 weeks did not increase the mean plasma cholesterol level. The apoprotein ratios did not change as a result of the increased cholesterol diet and were not significantly different between the two response groups. The hyper and hyporesponders differed significantly in initial plasma cholesterol parameters that diminished as the subjects were challenged with increased cholesterol consumption. These initial differences included a significantly lower low density lipoprotein cholesterol/high density lipoprotein cholesterol ratio of 2.26±0.6 for hyperresponders compared to 3.31±0.9 for hyporesponders. There were also initial differences in the percentage of whole plasma cholesterol found in the HDL fractions: hyperresponders had a greater percentage of total and free cholesterol in the HDL and HDL-2 fractions and a greater percentage of total cholesterol in the HDL-3 fraction. The present data demonstrate that increased cholesterol consumption will increase plasma cholesterol levels and that there is individual variability of plasma cholesterol response as a result of feeding cholesterol. / Graduation date: 1984

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