1,721,159 research outputs found
CUHK electronic theses & dissertations collection
No full textLee Pui Sze Priscilla."October 2003."Thesis (Ph.D.)--Chinese University of Hong Kong, 2003.Includes bibliographical references.Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.Mode of access: World Wide Web.Abstracts in English and Chinese
Hexacyanoferrate-based nanocomposites for the electrochemical sensing of hydrogen peroxide and nicotine / Lee Pui Kee
No full textMetal hexacyanoferrate (MeHCF) is a unique material that not only acquired immense research interest in electrochemical sensing field but also possesses potential as energy storage material. As such, the present thesis sought to investigate the facile method to synthesis MeHCF-based nanocomposites and explore its possible applications. First, comparative research on the synthesis of Prussian blue-polypyrrole (PB-PPy) nanocomposite by novel self-assembly (SA) method and conventional electrodeposition technique was performed. PB-PPy nanocomposites were prepared by the novel self-assembly method and via the electrodeposition approach. The nanocomposites were compared in term of surface morphology and its electrochemical and electrocatalytic characteristics. The results indicated that the SA PB-PPy with 10 deposition cycles demonstrated good sensing behaviour towards hydrogen peroxide (H2O2) with a sensitivity of 384.7 mA M-1 cm-2 whereas capacitive property was observed when the deposition cycles were increased to 20. The SA approach offers easy preparation of electrodes, which allows control of its electrochemical behaviour and sensitivity towards H2O2. The second part of this work emphasised on the facile synthesis of PB analogue: copper hexacyanoferrate (CuHCF) towards nicotine. Reduced graphene oxide (rGO) was used as a substrate to enhance operational stability. The linear range of this fabricated electrochemical sensor was between 0.03 to 5 mM, which is the highest among the reported works, with a compatible sensitivity of 211.5 mA M-1 cm-2. In addition, this sensor was applied for the detection of nicotine in vape (e-cigarette) sample from the market. For the last section of this work, the capacitive behaviour of SA PB-PPy by 20 deposition cycles was investigated as capacitor material. The areal capacitance of PB- PPy was at least ten-fold of pristine PB. This revealed PB-PPy can be a promising candidate for energy storage purpose
Hong Kong Reintegrating with China: Political, Cultural and Social Dimensions by Lee Pui-tak
No full textThis collection of essays aims to achieve 'a systematic analysis of Hong Kong's political, social (or socio-economic) and cultural relations with China' (p. xiv) as the territory made its transition from British to Chinese sovereignty. It is divided into three sections: politics before and after 1997, social and economic interactions between Hong Kong and China, and the making of Hong Kong identity
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Disclosure standards of Chinese companies: a comparative study of companies with both A and H shares Listings.
Full text linkby Lee Pui-Wah, Josephine.Thesis (M.B.A.)--Chinese University of Hong Kong, 1997.Includes bibliographical references (leaves 41-42).ABSTRACT --- p.iiACKNOWLEDGEMENTS --- p.iiiTABLE OF CONTENTS --- p.ivChapterChapter I. --- INTRODUCTION --- p.1Purpose of Study --- p.3Chapter II. --- METHODOLOG --- p.4Approach --- p.4Time Horizon Covered in the Paper --- p.5Assumption --- p.5General Problems of Studies in China --- p.5Chapter III. --- CHINESE SHAREHOLDING REFORM AND OPERATING ENVIRONMENT --- p.6Chinese Legal System --- p.6Hong Kong Stock Market - H Shares Profile --- p.7Chinese Stock Market - A Shares Profile --- p.8Chapter IV. --- THEORIES RELATED TO STOCK MARKET REGULATION --- p.12Market Failure Theory --- p.14Public Choice Theory --- p.15COMPARATIVE ANALYSIS --- p.17Information Disclosure Related to Important Transactions --- p.18Information Disclosure Related to Takeover and Merger --- p.20Financial Information --- p.23Disclosure of Directors' and Substantial Shareholders' Interests --- p.24Chapter V. --- EVALUATION --- p.25Depth and Breadth of Information --- p.25The Quality of Information --- p.26Difficulties that Issuers Confront --- p.27Cultural Influence --- p.27Lack of Motivation --- p.28Lack of Education and standards --- p.28The Importance of Information in a Speculative Market --- p.29Nature of Reform --- p.30Chapter VI. --- CONCLUSION --- p.31APPENDIX --- p.34BIBLIORGRAPHY --- p.4
Variations on the Author
Full text link“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
Full text linkWe 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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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