Thesis (doctoral)--Bonn, 1984. / Bibliography: p. 200-203.

Thesis (doctoral)--Rheinische Friedrich-Wilhelms-Universität Bonn, 1996. / Includes bibliographical references (p. 115-116).

Thesis (doctoral)--Bonn, 1984. / Includes bibliographical references (p. 160-162).

Inaug.-Diss.--Bonn.

Proefschrift--Vrije Universiteit, Amsterdam. / "Literatuur": p. [63].

Biomaterials is a systematically, pharmacologically inert substance designed for implantation within or incorporation with a living system. The ultimate goal of biomaterials is to restore function of living tissues and organs of the body. Chemical stability, mechanical behavior and biocompatibility in body fluids and tissues are basic requirements for successful application of implant materials in hip replacements. The field of biomaterials has become a vital area, as these materials can enhance the quality and longevity of human life and the science and technology associated with this field has now led to multi-million dollar business. The thesis focuses mainly on fractured analysis of retrieved titanium-alloy modular hip implants, even though there exists biomaterials made up of ceramics, polymers and composite materials As it is well known that a good biomaterial should possess the fundamental properties such as better mechanical and biological compatibility and enhanced wear and corrosion resistance in biological environment. The primary purpose of this thesis was to identify the reasons which lead to fracture of implant retrieved from 60years old male implanted for a 16 month time. The retrieved Implant was sterilized for two hours to overcome bio hazardous condition. The fractured area of implant sleeve and stem was cut with help of machine ISOMET BUEHLER 4000 consisting of diamond saw. The cut sample was placed into physiological solution (0.9% NaCl in H2O), and was maintained at room temperature over night. Samples were then thoroughly brushed with help of toothpaste and tooth brush to get rid of tissue deposits and blood stains so as to get clear picture under SEM. Fractures sample was than observed under Scanning Electron Microscope and a detailed study revealed fretting corrosion and fatigue failure were main cause of implant failure. After examining under SEM, sample was than prepared to be polished by covering it with epoxy and using BUEHLER polishing machine and sand paper from 240-1200 grid and finally a micro cloth to smoothen the surface. After sample being polished, it was immersed in Kroll solution for etching and observing under microscope to figure micro-structural changes.

By identifying these sampling of systems, research was undertaken to connect possible systems to create a technology platform. This system being one possibility within ideas already thought out from groups like Archigram and the Metabolism group until today with all the debate from container architecture to prefabricated houses and buildings. This is not an effort to propose new ways of thinking in architecture, but combining ideas and systems out in the open to create a system and a building, being able to fit into context in Africa and also in the systems and context of the bigger world. The Theoretical investigation (pp. 10-16) was not supplied by the student / Dissertation (MArch(Prof))--University of Pretoria, 2008. / Architecture / unrestricted

The aim of this thesis is to provide an introduction to the study of elliptic curves and modular forms over general commutative rings or schemes. We will recall a few aspects of the classical theory of these objects (over the complex numbers) while placing emphasis on the geometric picture. Moreover, we will formulate the theory of elliptic curves in the modern language of algebraic geometry following the work of Katz and Mazur. In addition, we provide an application of p−adic modular forms to the theory of p−adic heights on elliptic curves.

<p> This thesis determines necessary and sufficient conditions for an equational class to be modular and finds a modular property that is equivalent to permutability.</p> / Thesis / Master of Science (MSc)

<p> A new prefabrication building system using modular construction is proposed. </p> <p> The existing housing systems, the requirements of both the housebuilding system and the dwelling house are discussed. The effect of innovation in building and the use of standardization, coordination and preferred dimensions are described.</p> <p> A study of the space allocation problem; its definition, importance, and solving techniques is presented.</p> <p> The computerization of plans based on the proposed system of building is achieved through the use of the user oriented program developed in this thesis. It designs the optimum plan configuration given the user requirements and constraints.</p> / Thesis / Master of Engineering (MEngr)