Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009. / Committee Chair: Meindl, James; Committee Co-Chair: Davis, Jeffrey; Committee Member: Callen, Russell; Committee Member: Gaylord, Thomas; Committee Member: Kohl, Paul; Committee Member: Mukhopadhyay, Saibal. Part of the SMARTech Electronic Thesis and Dissertation Collection.

Thesis (Ph. D.)--University of Missouri-Columbia, 1997. / Typescript. Vita. Includes bibliographical references (leaves 127-128). Also available on the Internet.

Thesis (M. Phil.)--University of Hong Kong, 2005. / Title proper from title frame. Also available in printed format.

Thesis (Ph. D.)--Lehigh University, 1999. / Includes vita. Includes bibliographical references (leaf 223).

Thesis (M.S.)--Rochester Institute of Technology, 1992. / Typescript. Includes bibliographical references (leaves 56-58).

Miniature Hybrid Microwave Integrated Circuits (MHMIC's) in conjunction with Monolithic MIC's (MMIC's) play an important role in modern telecommunication systems. Accurate, fast and reliable analysis tools are crucial to the design of MMIC's and MHMIC's. The space-spectral domain approach (SSDA) is such a numerically efficient method, which combines the advantage of the one-dimensional method of lines (MoL) with that of the one-dimensional spectral-domain method (SDM). In this dissertation, the basic idea of the SSDA is first introduced systematically. Then, a quasi-static deterministic variation of the SSDA is developed to analyze and design low dispersive 3-D MMIC's and MHMIC's. S-parameters and equivalent circuit elements for discontinuities are investigated. This includes air bridges, smooth transitions, open ends, step in width and gaps in coplanar waveguide (CPW) or microstrip type circuits. Experimental work is done to verify the simulation. The full-wave SSDA is a more generalized and field theoretically exact numerical tool to model also dispersive circuits. The new concept of self-consistent hybrid boundary conditions to replace the modal source concept in the feed line is used here. In parallel, a deterministic approach is developed. Scattering parameters for some multilayered planar discontinuities including dispersion effect are calculated to validate this method. / Graduate

The problem of electromagnetic field penetration in the finite-resistivity conductors of a uniform, multiple, coupled transmission line system (MTL) is considered. Under the assumption of quasi-transverse electric and magnetic (quasi-TEM) mode of propagation, the problem of determining the per-unit-length resistance and inductance matrices for such MTL systems reduces to solving a quasi-magnetostatic problem. An integral equation for the current density distribution inside the conductors is formulated and solved numerically using the method of moments. From straightforward energy considerations and the current density distribution, the per-unit-length resistance and inductance matrices are calculated. Several microstrip configurations are then analysed and the effects of the geometrical characteristics of the structures on the per-unit-length inductance and resistance matrices, as well as their frequency dependence are investigated.

Purpose – The purpose of this thesis is to investigate how mandatory obligation to follow the International <IR> Framework while producing the corporate reports influence the intellectual capital disclosures in the reports. Research design – The study uses a disclosure scoreboard to score a selected sample of annual reports depending on whether it disclose intellectual capital information or not. The sample consists of companies listed in South Africa were it is mandatory to follow the integrated reporting framework and companies listen in Sweden where it is not mandatory to produce an integrated report. Empirical results and conclusion – The results of this thesis indicates that the mandatory use of the International <IR> Framework have an impact on the amount of intellectual capital disclosures. Further it concludes that higher level of compliance with the framework further increases the intellectual capital disclosure. Contribution – This study has been an early step towards concluding whether the use of integrated reporting has any effect on the amount of intellectual capital information disclosed in companies’ annual report.

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