Thesis (M.P.A.)--University of Hong Kong, 2002. / Includes bibliographical references (leaves 103-104). Also available in print.

Thesis (M. Sc.)--University of Hong Kong, 2005.

Thesis (Ph. D.)--Baylor University, 2006. / Includes bibliographical references (p. 133-144).

We study properties of algorithms which minimize (or almost minimize) empirical error over a Donsker class of functions. We show that the L2-diameter of the set of almost-minimizers is converging to zero in probability. Therefore, as the number of samples grows, it is becoming unlikely that adding a point (or a number of points) to the training set will result in a large jump (in L2 distance) to a new hypothesis. We also show that under some conditions the expected errors of the almost-minimizers are becoming close with a rate faster than n^{-1/2}.

Made available in DSpace on 2016-08-29T15:33:25Z (GMT). No. of bitstreams: 1 tese_9881_Ata de defesa.pdf: 679815 bytes, checksum: bd13283b6e7f400de68b79f04cf0b4a9 (MD5) Previous issue date: 2016-05-20 / The objective of this work is to present the effectiveness and efficiency of algorithms for solving the loss minimization problem in Multi-Label Classification (MLC). We first prove that a specific case of loss minimization in MLC isNP-complete for the loss functions Coverage and Search Length, and therefore,no efficient algorithm for solving such problems exists unless P=NP. Furthermore, we show a novel approach for evaluating multi-label algorithms that has the advantage of not being limited to some chosen base learners, such as K-neareast Neighbor and Support Vector Machine, by simulating the distribution of labels according to multiple Beta Distributions.

This thesis is about Zero Waste governance in Scotland. The thesis has three aims: empirically, it seeks to develop an understanding of the Scottish Zero Waste policy; theoretically, it aims to critically assess this policy in relation to Governmentality for Sustainable Development; and methodologically, it investigates the use of governmentality as an analytical framework through which to understand governance of complex sustainability issues. The thesis argues that existing studies of Zero Waste have limited engagement with social theories. It is suggested that governmentality offers a potential theoretical framing through which to better understand Zero Waste governance. The thesis develops a process to critically evaluate Zero Waste governmentalities in comparison with a prescriptive Governmentality for Sustainable Development. Using a Sustainability Science approach, the thesis adopts a pluralist methodology in which multiple perspectives are valued in both data collection and analysis. Using a framework developed from empirical data and academic studies, data from expert interviews and policy documents is used to construct an understanding of Zero Waste policy in Scotland. The thesis found that Zero Waste in Scottish policy is understood as a tangible goal and a philosophy of resource use. Innovative governance techniques to promote Zero Waste are identified within policy. It is argued that the Zero Waste policy in Scotland presents a new form of governmentality. It is suggested that this governmentality has the potential to align with Governmentality for Sustainable Development. However, it is found that the strong transdisciplinarity envisaged as part of Governmentality for Sustainable Development is lacking in Zero Waste governance. This thesis considers the role of post-normal techniques in Zero Waste and evaluates and promotes the use of governmentality as a way to develop the strong transdisciplinarity missing from the Zero Waste policy in Scotland.

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Approved for public release; distribution is unlimited / The purpose of this thesis is to find suitable ways to design feedback compensators for high order systems by using Root-Locus methods. As a starting point we will examine a motor amplidyne system and a position control system that were previously designed using Bode methods. Then we generalize the method and extend it to other systems. The final subject of this thesis is to design feedback compensators as filters by using state feedback coefficients to define zeros of the filter, then we extend this idea to build cascade filters. / http://archive.org/details/designingfeedbac00kork / Lieutenant, Junior Grade, Turkish Navy

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Terahertz (THz) band represents the unused frequency band between the microwave and optical bands and lies in the range of frequencies between 0.1 to 10 THz. As a result, the THz signal generation can be done using electronic or photonic circuits. Moreover, the channel gain has hybrid features from both microwave and optical bands allowing to reap the benefits of each band. Adopting such a technology can mitigate the spectrum scarcity and introduce a substantial solution to other systems such as visible light communications. Despite of the generous bandwidth, the THz communications suffer from high attenuation that increases with adopted frequency similar to the microwave frequency band. Furthermore, THz communications are subject to a different type of attenuation called Molecular Absorption, that depends on the chemical nature of the ambiance air. Thus, THz transmitters need to use extra power and high antenna gains to overcome signal loss and compensate the short distance range limitation. In this thesis, we investigate the pathloss model to compute the overall attenuation faced by the THz wave for different frequencies and weather conditions. Then, we use the THz technology to support the operation of uplink networks using directional narrow beams. We optimize the uplink communication network resource represented in the frequency bands and the assigned power in order to minimize the total power consumption while achieving a specific quality of service. Furthermore, we investigate the impact of weather conditions and the system’s requirements in order to guarantee a better performance.