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Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1992. / Vita. Abstract. Includes bibliographical references (leaves 149-153). Also available via the Internet.

Thesis--Wisconsin. / Vita. Includes bibliographical references (leaves 160-164).

Free energy techniques provide the basis for an analysis of aspects of the liquid-vapour interface undertaken in this study. The main focus of this work is an extensive theoretical investigation into properties of the surface tension, including curvature dependance and supersaturation effects, using Monte Carlo computer simulation techniques. / Thesis (PhD)--University of South Australia, 2002.

Optical techniques were used to study the critical behaviour of the pure fluids CHF₃, CCIF₃ and Xe, and binary mixtures He-Xe and nicotine + water. We find that for all these substances, the order parameter is described by a power law in the reduced temperature t = (Tc - T)/Tc with a leading exponent β = 0.327 ± 0.002. Also, we determine the first correction to scaling exponent to be Δ = 0.43 ± 0.02 for the pure fluids and Δ = 0.50 ± 0.02 for the He-Xe system. The coexistence curve diameter in CHF₃ and CCIF₃ exhibits a deviation from rectilinear diameter, in agreement with a modern theory which interprets this behaviour as resulting from three-body effects. In contrast, no such deviation is observed in Xe where, according to that theory, it should be more pronounced than in other substances. In the polar fluid CHF₃, the order parameter, isothermal compressibility and the chemical potential along the critical isotherm were simultaneously measured in the same experiment in an effort to ensure self-consistency of the results. From the data, two amplitude ratios which are predicted to be universal are determined: Γ+⃘ /Γ-⃘= 4.8 ± 0.6 and D⃘Γ+⃘B⃘δ-₁ = 1.66 ± 0.14. In the binary liquid system nicotine + water, the diffusivity was measured both by light scattering and by interferometry. The results agree qualitatively, but differ by a factor of ≈ 2. From the light scattering data, the critical exponent of the viscosity is found to be zη = 0.044 ± 0.008. The interferometric experiments on Xe and He-Xe furnish a direct way to maesure the effects of wetting: From the data, the exponent of the surface tension is found to be n = 1.24 ± 0.06. The similarity of the order parameter and compressibility in Xe and a He-Xe mixture containing 5% He indicate that the phase transition in this He-Xe mixture is of the liquid-gas type rather than the binary liquid type. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

Nesta dissertação, realizamos um estudo sobre cadeias unidimensionais quânticas de spin meio e spin um exatamente integráveis. Estudamos as propriedades do espectro de energia e efeitos produzidos no mesmo devido à finitude da cadeia. Para tal fim, exploramos as propriedades advindas da invariância por transformações conforme dos modelos em seus respectivos pontos críticos. Como apreciação dessa abordagem, estudamos o modelo exatamente integrável NDF, proposto por Alcaraz e Bariev, para partículas de spin 1. Verificamos em tal modelo uma transição de fase quântica. / In this dissertation, we have studied exactly integrable unidimensional quantum spin chains of spin 1/2 and spin 1. Special atention was given to the properties of the energy eigenspectra of these chains and particularly to their finite size effects. To achieve this goal, we have explored the invariance by conformal transformations of the models in their critical points. As an appreciation of these studies, we have studied the exactly integrable model NDF of spin 1, proposed by Alcaraz e Bariev. We verified that such model possess a quantum phase transition.

Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Physics. / M̲i̲c̲ṟo̲f̲i̲c̲ẖe̲ c̲o̲p̲y̲ a̲v̲a̲i̲ḻa̲ḇḻe̲ i̲ṉ A̲ṟc̲ẖi̲v̲e̲s̲ a̲ṉḏ S̲c̲i̲e̲ṉc̲e̲. / Vita. / Bibliography : leaf 134. / Ph.D.

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1982. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE / Bibliography: leaves 63-64. / by Karen Marie Klincewicz. / M.S.

Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1981. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE. / Vita. / Bibliography: leaves 523-531. / by Glenn Thomas Hong. / Sc.D.

Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1981. / MICROFICHE COPY AVAILABLE IN SCIENCE AND ARCHIVES. Science copy in 2 v. / Vita. / Bibliography: leaves 320-331. / by Ronald Ted Kurnik. / Sc.D.