Hong, Wei = 膠體玻璃化相變的實驗及理論研究 / 洪偉. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2011. / Includes bibliographical references (leaves 89-91). / Abstracts in English and Chinese. / Hong, Wei = Jiao ti bo li hua xiang bian de shi yan ji li lun yan jiu / Hong Wei. / Abstract --- p.i / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Experimental background --- p.2 / Chapter 1.1.1 --- What is a colloidal system? --- p.2 / Chapter 1.1.2 --- Single particle diffusion --- p.5 / Chapter 1.1.3 --- Inter-particle interaction --- p.9 / Chapter 1.1.4 --- Colloidal phase transition --- p.14 / Chapter 1.2 --- Glass transition --- p.16 / Chapter 1.2.1 --- Vibrational modes --- p.18 / Chapter 1.2.2 --- Dynamics --- p.21 / Chapter 2 --- Experimental setup and methods --- p.29 / Chapter 2.1 --- Sample and setup --- p.29 / Chapter 2.1.1 --- Sample preparation --- p.29 / Chapter 2.1.2 --- Setup --- p.32 / Chapter 2.2 --- Resolution enhancement --- p.36 / Chapter 2.2.1 --- Alignment --- p.36 / Chapter 2.2.2 --- Lens resolution --- p.37 / Chapter 2.2.3 --- Lens combination --- p.38 / Chapter 2.2.4 --- LED light source and filter --- p.39 / Chapter 2.3 --- Image preprocessing --- p.42 / Chapter 2.3.1 --- Background subtraction --- p.42 / Chapter 2.3.2 --- Noise filter --- p.43 / Chapter 2.3.3 --- Particle recognition and tracking --- p.45 / Chapter 2.3.4 --- Dedrift --- p.47 / Chapter 3 --- Measurement --- p.50 / Chapter 3.1 --- Dynamical characteristics --- p.50 / Chapter 3.1.1 --- Mean squared displacement --- p.50 / Chapter 3.1.2 --- Diffusion coefficient versus area fraction --- p.56 / Chapter 3.2 --- Structural characteristics --- p.58 / Chapter 3.2.1 --- Pair correlation function --- p.58 / Chapter 3.2.2 --- Cluster statistics --- p.62 / Chapter 4 --- Dynamical heterogeneity and structural properties --- p.67 / Chapter 4.1 --- Dynamical heterogeneity --- p.67 / Chapter 4.2 --- Structural properties --- p.71 / Chapter 4.2.1 --- The general picture --- p.71 / Chapter 4.2.2 --- Identification of the slow particles --- p.72 / Chapter 4.2.3 --- Growing clusters of slow particles --- p.80 / Chapter 5 --- Discussion --- p.81 / Chapter 5.1 --- Percolation model --- p.81 / Chapter 6 --- Summary and conclusion --- p.87 / Bibliography --- p.89

This thesis examines the collection of Cypriot glass stored in the basement at Scripps and its context throughout history. The first chapter focuses on the collection itself and includes a brief summary of the founding of the Mudd family’s Cyprus Mines Corporation, which led to the collection of the glass. The repatriation of the collection is also detailed. The second chapter examines the history of Cyprus, and how valuable resources such as copper led to trade on the island. A history of glass is given: how it was made, what it was made out of, and how it was used and appreciated at different times in history. The third chapter addresses the history of the glass trade and production on Cyprus. Island-specific shapes and production are explored. This chapter also looks at how glass was valued and used by different levels of society as glass production evolved and led to a saturated market. The fourth chapter focuses on five pieces selected from the Scripps and Mudd collections. These case studies include conservation condition reports. Physical description, condition, use, and similar examples in other collections are detailed. The final chapter addresses glass conservation. It contains an analysis of previous conservation interventions, descriptions of different types of weathering and degradation, and tips for stabilizing, storing, shipping, handling, and displaying the collection.

The research and development of zinc selenide (ZnSe) based wide-gap II¡VVI materials and related blue/green light-emitting devices have significantly progressed since 1990. ZnSe is also a promising material for use in windows, lenses, output couplers, beam expanders, optically controlled switching, visible transmission and giant photo-resistivity. Recently, ZnSe has become an important material used as the window layer of CuInSe2-based solar cells . To improve device performance, it is necessary to reduce interface defects and improve epitaxial layer quality. However, ZnSe thin films on glass substrates with high reliability and applicability have not yet been developed. In this study, a ZnSe buffer layer was firstly grown by SME during the initial stage of film growth; the film crystallinity could gradually be improved layer by layer with smaller thicknesses. While the lattice disorder of the buffer layer decreased rapidly after several cycles of SME growth, the interfacial lattice mismatch between the buffer layer and the ZnSe film deposited by MBD was reduced. Thus, ZnSe films with buffer layers demonstrated better crystallinity. Initial growth stage evaluation of high-quality ZnSe films deposited on glass substrate was investigated. The self-limiting monolayer epitaxial (SME) process was used to pre-growth the buffer layer for a zinc selenide (ZnSe) film deposited. After alternating depositions for several cycles, the growth mode was changed to the molecular beam deposition (MBD) mode under growth conditions. Films deposited at substrate temperatures of 250¡V350¢XC and Se/Zn beam equivalent pressure (BEP) ratios of 0.77¡V1.87 were investigated. The crystal structure and preferred orientation of as-grown ZnSe films were examined using X-ray diffraction (XRD) patterns. The optical properties of the ZnSe films were revealed by photoluminescence spectra. The structure properties of as-deposited ZnSe films have been measured by X-ray diffraction (XRD) technique. The optimum film growth condition has been determined rapidly by comparing and analyzing the relative full width at half-maximum (FWHM) and peak intensity of XRD spectra. The composition of ZnSe films is determined by energy dispersive spectroscopic (EDS) analysis. Optical properties of ZnSe films are characterized by photoluminescence spectra. In addition, the structural parameters, crystallinity, lattice constant, grain size, strain, dislocation density and orientation of ZnSe film calculated are correlated with their growth conditions. The characteristics of the ZnSe films with and without a buffer layer were compared and discussed in detail. Finally, our results demonstrate that how the quality of ZnSe film can be improved on glass substrates for application to various devices.

The primary goal of the conservator is to stabilize and conserve artifacts with the best possible treatment available. Ideally, these treatments are noninvasive and reversible, and maintain the integrity of the object as a top priority. In this respect, it is the responsibility of the conservator to research other possible treatments when traditional methods prove to be insufficient to properly stabilize and conserve an object. Sometimes choosing to treat with a seemingly unorthodox method is the only chance for the objects survival. Though glass is considered one of the most stable archaeological materials, noninvasive, reversible treatments are not always possible given the level of deterioration glass objects undergo within the archaeological setting, specifically the underwater or waterlogged archaeological setting. This research is a consideration and investigation of the use of silicone polymers and silanes as consolidation materials for 17th-century glass recovered from aqueous environments. Working within the Conservation Research Laboratory and the Archaeological Preservation Research Laboratory at Texas A and M University, a newly developed polymer passivation technique utilizing materials acquired from the Dow Corning Corporation was applied to archaeological glass recovered from the 1686 shipwreck La Belle, excavated in Matagorda Bay off the coast of Texas by the Texas Historical Commission from 1996 to 1997. The successful application of a hydroxyl ended silicone polymer Q-1 3563, combined with a methyltrimethoxysilane intermediate crosslinker, Q-9 1315, at a 15% solution by weight and catalyzed with dibutyltin diacetate (DBTDA Fascat 4200) occurred in 1999. This project was the first large scale application of silicone polymers and silanes to 17th-century archaeological glass recovered from a marine site. Through this investigation we answered a number of questions regarding the use and application of the silicone technologies and confirmed that these materials are a viable resource for glass consolidation and conservation in terms of the suggested conservation guidelines of the IIC. The silicone technology was successfully applied to numerous types, forms, colors and degradation levels of glass. This included successful application to composite artifacts and the retreatment of objects unsuccessfully treated with a "traditional" method.

Thesis (M.S. in Poly.)--School of Textile and Fiber Engineering, Georgia Institute of Technology, 2004. Directed by Youjiang Wang. / Includes bibliographical references (leaves [66-67]).

Thesis (Ph. D.)--Lehigh University, 2001. / Includes vita. Includes bibliographical references (leaves 154-165).

Thesis (Ph. D.)--University of Texas at Austin, 2002. / Vita. Includes bibliographical references. Available also from UMI Company.

Not available / text

published_or_final_version / Mechanical Engineering / Doctoral / Doctor of Philosophy

No description available.