No description available.

An improved quenching technique is described. This technique allows samples to be quenched at slow quenching rates without introducing unwanted dislocations during quench. High quality platinum single crystals 1 mm in diameter have been quenched from temperatures between 900°C and 1550°C using this technique. The data have been analysed and discussed using a sink model for vacancy loss proposed by Emrick. The formation energy was found to be (1.30 ± 0.03) eV. The entropy of formation and the concentration of vacancies at the melting point have been determined to be respectively (0.42 ± 0.11)k and (9.4 ± 0.7)10⁻⁴. High purity palladium single crystals have also been quenched using the same technique. Due to the need for a temperature scale, measurements of the electrical resistance of an ultra pure palladium single crystal have been made to a temperature within 100°C of the melting point. These, along with measurements of the liquid palladium resistivity, are reported. The results are discussed and compared to previously reported values.

No description available.

This thesis contains the exploration and investigation of self-diffusion of Na-22 in Molten PbCl2-NaCl mixtures.

Siu-kwan Kwok. / Thesis (M.Phil.)--Chinese University of Hong Kong. / Bibliography: leaves [108-114]

Doctor of Philosophy (PhD) / In this thesis we consider several novel photonic crystal structures that derive their properties from optical resonances and mode coupling effects. We present first a theoretical analysis of a new class of photonic crystal device based on the combination of mode coupling and Fabry-Perot resonance effects. These structures exhibit characteristics that make them promising candidates as compact, integrated photonic components. The second aspect we consider is highly-efficient coupling into uniform photonic crystals. The results of this study identify inherent advantages of rod-type photonic crystals over the more common hole-type structures for in-band applications. The third contribution of this thesis is the demonstration of an efficient and powerful theoretical approach to studying photonic crystal devices. Throughout this work, we combine general numerical methods with simple physical models to develop physical insight into the behaviour of photonic crystal structures. We show that this can lead to novel device geometries with highly attractive properties.

Graduation date: 1997

Thesis (Ph. D.)--University of Oregon, 2001. / Typescript. Includes vita and abstract. Includes bibliographical references (leaves 236-238). Also available for download via the World Wide Web; free to University of Oregon users.

Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2003. / Includes bibliographical references. Also available in electronic version. Access restricted to campus users.

Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2003. / Includes bibliographical references (leaves 176-186). Also available in electronic version. Access restricted to campus users.