In this research, a time-based oversampling delta-sigma (ΔΣ) ADC architecture is introduced. This system uses time, rather than voltage or current, as the analog variable for its quantizer, and the noise shaping process is realized by modulating the width of a variable-width digital “pulse.” The ΔΣ loop integrator, the quantizer and digital-to-analog converter (DAC) are all time-based circuits and are implemented using digital gates only. Hence, no amplifier or voltage-based circuit is required. The proposed architecture not only offers a viable for nano-scale ‘digital’ IC technologies, but also enables improved circuit performance compared to the state-of-the-art. This is in contrast to conventional voltage-based analog circuit design, whose performance decreases with scaling due to increasingly higher voltage uncertainty due to supply voltage. The proposed architecture allows all digital implementation after the Voltage to Time Converter (VTC) and merged multi-bit quantizer/DAC blocks by taking advantage of delay lines reusable in both quantization and DAC operation. The novelty of this architecture is digital pulse width processing to implement the ΔΣ modulation. It is realized with small area and potentially can take advantage from the process scaling. A 3-bit prototype of this ADC in 0.18 μm CMOS process is implemented, tested, and presented. With an OSR of 36 and a bandwidth of 2 MHz, it achieves a SNDR of 34.6 dB while consuming 1.5 mA from a 1.8 V supply. The core occupies an area of 0.0275 mm² (110μm × 250μm = 0.0275 mm²). The second generation of the architecture was fabricated in IBM 45 nm SOI process. The oversampling frequency of this system is 705 MHz and oversampling ratio of 64. The expected performance is 7-bit effective resolution for a 5.5 MHz bandwidth while consuming 8mW of power and occupying a core area of less than 0.02 mm² (160μm × 120μm = 0.0192 mm²). / text

Univ., Diss.--Köln, 2007. / Literaturverz. S. 257 - 264.

Zugl.: Siegen, Univ., Diss., 2009

This thesis explores the diverse range of textual and visual architectural representations in twelfth-century didactic texts. It argues that these representations are not arbitrarily chosen frameworks for holding data; instead, architecture can perform a certain pedagogical role. In this role architectural representations mediate between imperceptible abstract concepts in the text and the tangible world of the reader. By focusing on the relationship between text and image this thesis argues that the two play a meaningful part in conveying intangible elements of the world to the reader. The thesis creates an alternative to the historiography on architecture and its representations by redirecting focus from the development of technical drawings and onto the intellectual context of the drawings, and ultimately questions why architecture, in particular, appears so frequently in didactic manuscripts of the period. The argument is framed by two points. First, it recognises the manifold ways in which architectural representations appear by focusing on three particular examples: quadrivial texts, Richard of Saint Victor's In visionem Ezechielis, and Honorius Augustodunensis' Gemma animae. These texts provide case studies to argue the primary point of thesis, namely, that architectural representations were used to provide tangible or kinaesthetic models to aid readers' understanding of difficult material. Second, the language and structure of the three studies reflect a dimensional framework that was used to articulate particular aspects of the drawings. The dimensional aspects of the drawings appear in texts as references to length, width, height, and the typological qualities of architecture. Overall the thesis has two important implications. First by recognising the important relationship between text and image it is possible to draw out the pedagogical aims and processes present in some twelfth-century didactic works. Second, common examples of architectural representations, such as Gospel canon tables, are recognised as part of a broader spectrum of heuristic images and diagrams.

"The references above are illustrative of the fact that an effective right to information is significant to democracy and has an unequivocal basis in international and comparative human rights law. Although international jurisprudence in this area has been ambivalent, in this essay, a mounting body of evidence is produced in support of the proposition that Zambia, as part of the global village is under an obligation to gaurantee citizens a right to access information. ... The work is divided into five chapters. The first chapter introduces the subject and provides a general overview of the study. Chapter two addresses the theoretical framework and international standards in the area of access to information. Chapter three focuses on the South African context in detail and touches on the Ugandan freedom of information regime. The fourth chapter focuses on the situation in Zambia looking at the obvious gaps in relation to global trends as well as what Zambia could borrow from the South African experience and avoid from the Ugandan regime. The practice in terms of accessibility of public information is discussed, and chapter five is the concluding chapter with a summary of the findings in the foregoing chapters, as well as recommendations." -- Introduction. / Prepared under the supervision of Prof. Frederick Juuko at the Faculty of Law, Makerere University, Kampala, Uganda / Thesis (LLM (Human Rights and Democratisation in Africa)) -- University of Pretoria, 2006. / http://www.chr.up.ac.za/academic_pro/llm1/dissertations.html / Centre for Human Rights / LLM

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Extant information systems literature has viewed systems acceptance and adoption from a technocentric viewpoint that emphasizes post-implementation intentions and attitudes - mainly usefulness and ease of use. Further, the effects of organizational hierarchy and work-environment factors have not been adequately factored largely because the single level user-level perspective has dominated. This dissertation addresses this gap by incorporating work environment factors while focusing on users’ preliminary, pre-implementation attitudes, perceptions, and intentions. It thus employs a multilevel perspective that allows for deeper insights into the interplay between workgroup- and individual-level phenomena. The objectives herein are, first, to illuminate change readiness as a plausible lens through which system acceptance and adoption can be viewed. Although change readiness is predominantly studied in organizational behavior, it has not yet been applied in information systems research. Consequently, it presents a promising approach to explore users’ responses to new systems. Secondly, this dissertation aims to empirically explore the multilevel nature of the change readiness constructs as envisaged in the framework of the antecedents and outcomes of change readiness. The research model is adapted from the multilevel framework of the antecedents and outcomes of change readiness as propounded by Rafferty et al. (2013). Appropriate hypotheses are developed and a survey instrument established to test those hypotheses. To ensure validity, preliminary investigations are conducted after an expert panel review. Subsequently, data was collected and analyzed to assess the extent to which the proposed model and hypotheses are empirically supported. Results and findings from this dissertation have theoretical and practical implications. Extant literature notes the dearth of research that theorizes outcomes of change readiness in the organizational behavior domain. This dissertation theorizes intention to adopt as an outcome of change readiness. Practice benefits from the context-based empirical results which (1) examine whether change readiness has any significant impact on system adoption and (2) the effect of workgroup change readiness on individual’s intention to adopt the system.

Call number: LD2668 .T4 1956 C73 / Master of Science

Call number: LD2668 .T4 1984 S63 / Master of Science

Published Article / The relationship between the big five personality traits, Extraversion, Agreeableness Neuroticism, Conscientiousness and Openness to Experience and deep and surface approaches to learning forms the basis of this article. The findings of a research study in this milieu will be presented to prove that earlier studies in this field have been upheld, but that an important deviation has occurred on certain levels of personality. A students way of learning implies the type of learning that is taking place. Ultimately we as lecturers want to encourage deep learning as this stimulates retention of information, important in production of students that are ready for employment.