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Cu cao biao mian de re tuan liu dui liu de Nusselt shu he Leinuo shu de ce liang
No full textChan, Tak Shing = 粗糙表面的熱湍流對流的Nusselt數和雷諾數的測量 / 陳德城.Thesis (M.Phil.)--Chinese University of Hong Kong, 2008.Includes bibliographical references (p. 63-67).Abstracts in English and Chinese.Chan, Tak Shing = Cu cao biao mian de re tuan liu dui liu de Nusselt shu he Leinuo shu de ce liang / Chen Decheng.Table of Contents --- p.vList of Figures --- p.xiList of Tables --- p.xiiChapter 1 --- Introduction --- p.1Chapter 1.1 --- What is turbulence ? --- p.1Chapter 1.2 --- Rayleigh Benard convection system --- p.3Chapter 1.2.1 --- Oberbeck-Boussinesq approximation and equations of Rayleigh- Benard system --- p.5Chapter 1.2.2 --- Some coherent structures of Rayleigh-Benard convection system --- p.7Chapter 1.3 --- Motivation --- p.8Chapter 2 --- Experimental methods and setups --- p.12Chapter 2.1 --- Convection cell --- p.12Chapter 2.2 --- Temperature measurement --- p.15Chapter 2.3 --- Experimental techniques --- p.16Chapter 2.3.1 --- Heat leakage prevention --- p.16Chapter 2.3.2 --- Water absorption of Dipropylene Glycol --- p.21Chapter 2.3.3 --- Particle Image Velocimetry --- p.22Chapter 3 --- Heat flux measurement --- p.25Chapter 3.1 --- Water Results --- p.26Chapter 3.1.1 --- Experimental procedures --- p.26Chapter 3.1.2 --- Heat leakage/ heat absorption estimation --- p.27Chapter 3.1.3 --- Results and discussions --- p.29Chapter 3.2 --- Dipropylene Glycol Results --- p.32Chapter 3.2.1 --- Experimental procedures --- p.32Chapter 3.2.2 --- Heat leakage/ heat absorption estimation --- p.33Chapter 3.2.3 --- Result and discussions --- p.34Chapter 3.3 --- More discussion --- p.41Chapter 4 --- Large scale circulation and Reynolds number measurement --- p.44Chapter 4.1 --- Flow pattern of turbulent Rayleigh-Benard convection over rough plates --- p.46Chapter 4.2 --- Reynolds number measurement --- p.48Chapter 4.2.1 --- Reynolds number determined from oscillation of temper- ature signals --- p.48Chapter 4.2.2 --- Reynolds number determined from velocity measurement near sidewall --- p.55Chapter 5 --- Conclusion --- p.61Chapter 5.1 --- Conclusion --- p.61Bibliography --- p.6
Dynamical wetting transitions : liquid film deposition and air entrainment
Get PDFThe speed at which a liquid can move over a substrate is strongly limited when the surface is partially dry. The wetting dynamics is then governed by the motion of the contact line, which has remained a challenging problem in fluid mechanics. Such moving contact lines play a key role for printing and imaging techniques. The technology of Immersion Lithography, for example, uses a portion of water between a lens and a substrate in order to increase the resolution. When the substrate is moving too fast, droplets are emitted at the receding part of the water. Similarly, air bubbles can be observed in the advancing part, suggesting entrainment of air at the advancing contact line. The transition from a steady interface to drop emission or air entrainment is called a dynamical wetting transition, and originates from the maximum speed at which contact lines can move across a surface. This thesis therefore addresses the fundamentals of “dynamical wetting transitions”
A Cognitive Information Theory of Music: A Computational Memetics Approach
Get PDFThis thesis offers an account of music cognition based on information theory and memetics. My research strategy is to split the memetic modelling into four layers: Data, Information, Psychology and Application. Multiple cognitive models are proposed for the Information and Psychology layers, and the MDL best-fit models with published human data are selected. Then, for the Psychology layer only, new experiments are conducted to validate the best-fit models.
In the information chapter, an information-theoretic model of musical memory is proposed, along with two competing models. The proposed model exhibited a better fit with human data than the competing models. Higher-level psychological theories are then built on top of this information layer. In the similarity chapter, I proposed three competing models of musical similarity, and conducted a new experiment to validate the best-fit model. In the fitness chapter, I again proposed three competing models of musical fitness, and conducted a new experiment to validate the best-fit model. In both cases, the correlations with human data are statistically significant.
All in all, my research has shown that the memetic strategy is sound, and the modelling results are encouraging. Implications of this research are discussed
A cognitive information theory of music : a computational memetics approach
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The impact of subordinates' professionalism on leadership effectiveness in the construction industry
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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