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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Collaborative infomediaries and the measuring factors that influence the success of infomediary.

January 2004 (has links)
Wong Wai-Yiu. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references (leaves 113-120). / Abstracts in English and Chinese. / Chapter 1 --- Introduction and Outline of the Dissertation --- p.1 / Chapter 1.1 --- Collaborative Infomediaries --- p.1 / Chapter 1.2 --- Measuring Factors that Influence the Success of Infomediary --- p.3 / Chapter 1.3 --- Thesis Contributions --- p.5 / Chapter 1.4 --- Thesis Organization --- p.7 / Chapter 2 --- Related Work on Collaborative Infomediary --- p.8 / Chapter 2.1 --- RECOMMENDER SYSTEM - Infomediary --- p.8 / Chapter 2.1.1 --- Utility-based recommenders --- p.9 / Chapter 2.1.2 --- Knowledge-based recommenders --- p.10 / Chapter 2.1.3 --- Content-based recommenders --- p.11 / Chapter 2.1.4 --- Collaborative recommenders --- p.12 / Chapter 2.1.5 --- Hybrid recommenders --- p.14 / Chapter 2.2 --- Types of Collaborative Filtering --- p.15 / Chapter 2.2.1 --- Memory-based methods --- p.15 / Chapter 2.2.2 --- Model-based methods --- p.16 / Chapter 2.3 --- Similarity Measures --- p.16 / Chapter 2.4 --- Prediction algorithm --- p.19 / Chapter 2.5 --- User Profile --- p.20 / Chapter 2.6 --- Relevance Feedback --- p.21 / Chapter 2.7 --- Comparison basis for user similarity --- p.22 / Chapter 3 --- Research Methodology --- p.23 / Chapter 3.1 --- Collaborative Infomediary System Design --- p.24 / Chapter 3.1.1 --- System Functionalities --- p.24 / Chapter 3.1.2 --- Overview of System Design --- p.24 / Chapter 3.2 --- User Profile --- p.26 / Chapter 3.2.1 --- Sources of news articles --- p.27 / Chapter 3.2.2 --- Regions of news --- p.27 / Chapter 3.2.3 --- Categories of Industries --- p.28 / Chapter 3.2.4 --- Listed Companies --- p.29 / Chapter 3.2.5 --- User-specified Keywords --- p.30 / Chapter 3.2.6 --- User Profile Scoring (Scoreprofile) --- p.30 / Chapter 3.3 --- User Feedback --- p.31 / Chapter 3.3.1 --- Scoring formulation for feedback (Score feedback) --- p.31 / Chapter 3.4 --- User Similarity --- p.33 / Chapter 3.4.1 --- Source --- p.34 / Chapter 3.4.2 --- Regions of news --- p.35 / Chapter 3.4.3 --- Category of Industries --- p.35 / Chapter 3.4.4 --- Listed companies in Hong Kong stock market and Userspecified Keywords --- p.36 / Chapter 3.4.5 --- Overall Similarity --- p.36 / Chapter 3.5 --- News Article Scoring --- p.37 / Chapter 3.6 --- User Interface of Collaborative Infomediary --- p.38 / Chapter 3.6.1 --- User Registration and Preference Setting --- p.38 / Chapter 3.6.2 --- Current Day News Retrieval --- p.42 / Chapter 3.6.3 --- Past News Retrieval --- p.46 / Chapter 3.6.4 --- Search News --- p.47 / Chapter 4 --- Evaluation Methodology & Experimental Results --- p.50 / Chapter 4.1 --- Experimental Design & Setup --- p.51 / Chapter 4.1.1 --- Performance Measures --- p.53 / Chapter 4.2 --- Experiment Results & Discussions --- p.54 / Chapter 4.2.1 --- Similarity Threshold against average number of collaborators --- p.54 / Chapter 4.2.2 --- Performance Measures among setups --- p.55 / Chapter 4.2.3 --- Performance Measures against Similarity Threshold --- p.59 / Chapter 5 --- Related work on the Measuring Factors that Influence the Success of Infomediary --- p.64 / Chapter 5.1 --- Different approaches to IS success measurement --- p.64 / Chapter 5.2 --- User Information Satisfaction/End-User Computing Satisfaction --- p.66 / Chapter 5.2.1 --- Definition of user satisfaction --- p.66 / Chapter 5.2.2 --- Factors/dimensions affecting IS user satisfaction --- p.67 / Chapter 5.3 --- Evaluation of Web-site --- p.69 / Chapter 5.4 --- Web Customer Satisfaction --- p.70 / Chapter 5.4.1 --- Customer satisfaction --- p.71 / Chapter 5.4.2 --- Factors/Dimensions affecting customer information satisfaction --- p.72 / Chapter 6 --- Research Methodology --- p.78 / Chapter 6.1 --- Methodological Approach --- p.78 / Chapter 6.2 --- Construct Definition and Item Pool Generation --- p.79 / Chapter 6.2.1 --- Customer Values on Infomediary --- p.79 / Chapter 6.2.2 --- Means Objectives and Fundamental Objectives --- p.80 / Chapter 6.3 --- Relationships between Customer Values --- p.85 / Chapter 6.4 --- Survey Instrument --- p.86 / Chapter 6.4.1 --- Task File --- p.87 / Chapter 6.4.2 --- Questionnaire: Demographic Variables and Measures . --- p.87 / Chapter 6.4.3 --- Sample Description and Survey Administration --- p.88 / Chapter 7 --- Data Analysis and Results --- p.90 / Chapter 7.1 --- DATA ANALYSIS APPROACH --- p.90 / Chapter 7.1.1 --- Purification --- p.90 / Chapter 7.1.2 --- Identification of Factor Structure --- p.92 / Chapter 7.1.3 --- Construct validity --- p.97 / Chapter 7.2 --- RESEARCH FINDINGS --- p.98 / Chapter 7.2.1 --- Descriptive statistics --- p.98 / Chapter 7.2.2 --- Purification- Means Objectives --- p.99 / Chapter 7.2.3 --- Factor Structure Identification- Means Objectives --- p.99 / Chapter 7.2.4 --- Construct validity- Means Objectives --- p.104 / Chapter 7.2.5 --- Purification- Fundamental Objectives --- p.104 / Chapter 7.2.6 --- Factor Structure Identification- Fundamental Objectives --- p.105 / Chapter 7.2.7 --- Construct validity- Fundamental Objectives --- p.107 / Chapter 7.2.8 --- A Model for Measuring factors that Influence Infomediary Success --- p.108 / Chapter 8 --- Conclusions and Future Work --- p.109 / Chapter 8.1 --- "Implications, Limitations and Future Work - Collaborative Infomediary" --- p.109 / Chapter 8.2 --- "Implications, Limitations and Future Work - Infomediary Success Factors" --- p.110 / Chapter 8.3 --- Conclusions --- p.112 / Bibliography --- p.113 / Chapter A --- Means Objectives Fundamental Objectives --- p.121 / Chapter A.1 --- List of Means Objectives & Fundamental Objectives --- p.121 / Chapter B --- Statistical Results for Collaborative Infomediary Experiment --- p.129 / Chapter C --- Statistical Results for Measuring Factors that influence success of Infomediary --- p.136 / Chapter D --- Survey Task File Questionnaire --- p.152 / Chapter E --- Tutorial Guide for experiment on Collaborative Infomediary --- p.170
2

The adoption of online information service :

Chen, Yen-Hao Howard. Unknown Date (has links)
An information service is one in which information is the primary value exchanged between two parties. The research object of the current study is information service provided online (termed as online information service, OIS) which is also the core service product in the service offerings of Internet content providers (ICPs). The OIS industry is the highest growth area in the current service revolution (Santos 2003). However, the many efforts so far in the industry for developing innovative OISs have largely failed to attract audiences and frustrated the attempts to generate revenue from subscriptions and advertising (Alves 2001; Sullivan 2006). Researchers face great challenge in applying conventional wisdom from information system (IS) research to analyse OISs. Bobbitt and Dabholkar (2001) and Santos (2003) argued that there is no comprehensive theoretical framework for understanding or predicting consumers' online adoption behaviour. Research to gain greater understanding of factors that contribute to online adoption behaviour is therefore of high priority. / The aim of the study is to identify the key factors contributing to the adoption of OISs, enhance the understanding of the adoption process of online innovation, and thereby confirm, or add to the general understanding of the innovation adoption process. For comprehensively exploring the factors, in addition to an extensive review of literature, a series of in-depth interviews with industry experts were conducted to potentially gather new and important insights not yet appearing in the literature. For facilitating the current research in a real business context and among typical OIS users, a new commercial OIS and a Web-based survey system co-designed by the researcher were launched by industry partners during study, and the survey respondents were then invited to answer questions online after sampling the new OIS. The current study uses multivariate analysis and also structural equation modeling (SEM) as the statistical analysis technique. / A conceptual model mainly developed from Technology Acceptance Model (TAM) for understanding the adoption of OIS is proposed and tested in the real business context. The extended model employed additional constructs drawn from Uses and Gratification Theory, among others, and demonstrated improved prediction capacity (55%). The inter-relations between constructs were also investigated. This study successfully identifies online users' key preference that influences the OIS adoption, and provides new and empirically-based insights into several important debates in the academic and industry literature. The conclusions and implications include that OIS adoption may not be enhanced by online interactivities among users (or termed as C2C online interactivities, such as on-site Blogs) and services that add values to the core service (or termed as “supplementary services”). These are contrary to what many experts expected. Also, the popular assumption of behaviour intention (BI) having a direct positive effect on actual adoption behaviour (B) is not supported by the data of the current research. / Thesis (PhD)--University of South Australia, 2007.
3

Perceptions of community college student services personnel about the online delivery of student services

Washington, Luther Marshall. January 1900 (has links)
Thesis (Ph.D.)--University of Nebraska-Lincoln, 2007. / Title from title screen (site viewed Aug. 2, 2007). PDF text: vi, 182 p. UMI publication number: AAT 3256645. Includes bibliographical references. Also available in microfilm and microfiche formats.
4

Believe it or not youth and young adult female perceptions of the credibility of online multimedia messages /

Adi, Ana. January 2007 (has links)
Thesis (M.A.)--University of Missouri-Columbia, 2007. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on October 23, 2007) Includes bibliographical references.
5

Technology acceptance of information services

Luo, Mei-Ling. January 2005 (has links)
Thesis (Ph. D.)--University of Hawaii at Manoa, 2005. / Includes bibliographical references (leaves 123-130).
6

Consumers' adoption of online financial services the case of Taiwan /

Chang, Chih-Chia. January 1900 (has links)
Thesis (D.B.A.)--Alliant International University, San Diego, 2009. / Adviser: Rene M. Naert. Includes bibliographical references.
7

The development and implementation of an online subscription information centre for the South African wine and brandy industry

Dippenaar, Christine 08 January 2009 (has links)
M.A. / This thesis summarises research into the feasibility and subsequent implementation of a subscription based online and electronic information resource centre for the South African wine and brandy industry. A business case was compiled and accepted by key decision makers in the industry. The information resource centre was established under a recognised industry body to ensure equal access to all the role-players in the industry. The benefits of a centralised industry information resource centre have been demonstrated to result in: ► Reduced information acquisition cost ► No unnecessary duplication of high cost items, such as market analysis reports ► Improved and accelerated dissemination of information within the local industry through the use of a full electronic distribution strategy ► A point of contact for information for all role-players in the local industry and not just those organisations or institutions which have large research and marketing budgets ► A consistent and a unified database of local and international holdings within the local industry.
8

A context-aware model to improve usability of information presented on mobile devices

Ntawanga, Felix Fred January 2014 (has links)
Online information access on mobile devices is increasing as a result of the growth in the use of Internet-enabled handheld (or pocket-size) devices. The combined influence of recent enabling technologies such as Web 2.0, mobile app stores and improved wireless networks have driven the increase in online applications that allow users to access various types of information on mobile devices regardless of time and location. Examples of such applications (usually shortened to app) include: social media, such as FacebookTM App and TwitterTM App, banking applications such as (Standard Bank South Africa)TM Mobile Banking App and First National Bank (FNB) BankingTM App, and news application such as news 24TM App and BBCTM News App. Online businesses involved in buying, selling and business transaction processing activities via the Internet have exploited the opportunity to extend electronic commerce (e-commerce) initiatives into mobile commerce (m-commerce). Online businesses that interact with end user customers implement business to consumer (B2C) m-commerce applications that enable customers to access and browse product catalogue information on mobile devices, anytime, anywhere. Customers accessing electronic product catalogue information on a mobile device face a number of challenges such as a long list of products presented on a small screen and a longer information download time. These challenges mainly originate from the limiting and dynamic nature of the mobile apps operating environment, for example, dynamic location, bandwidth fluctuations and, diverse and limited device features, collectively referred to as context. The goal of this research was to design and implement a context-aware model that can be incorporated into an m-commerce application in order to improve the presentation of product catalogue information on m-commerce storefronts. The motivation for selecting product catalogue is prompted by literature which indicates that improved presentation of information in m-commerce (and e-commerce) applications has a positive impact on usability of the websites. Usable m-commerce (and e-commerce) websites improve efficiency in consumer behaviour that impacts sales, profits and business growth. The context-aware model aimed at collecting context information within the user environment and utilising it to determine optimal retrieval and presentation of product catalogue in m-commerce. An integrated logical context sensor and Mathematical algorithms were implemented in the context-aware model. The integrated logical context sensor was responsible for the collection of different types of predetermined context information such as device specification or capabilities, connection bandwidth, location and time of the day as well as the user profile. The algorithms transformed the collected context information into usable formats and enabled optimal retrieval and presentation of product catalogue data on a specific mobile device. Open-source implementation tools were utilised to implement components of the model including: HTML5, PhP, JavaScript and MySQL database. The context-aware model was incorporated into an existing m-commerce application. Two user evaluation studies were conducted during the course of the research. The first evaluation was to evaluate the accuracy of information collected by the context sensor component of the model. This survey was conducted with a sample of 30 users from different countries across the world. In-between the context sensor and main evaluation surveys, a pilot study was conducted with a sample of 19 users with great experience in mobile application development and use from SAP Next Business and Technology, Africa. Finally an overall user evaluation study was conducted with a sample of 30 users from a remote area called Kgautswane in Limpopo Province, South Africa. The results obtained indicate that the context-aware model was able to determine accurate context information in real-time and effectively determine how much product information should be retrieved and how the information should be presented on a mobile device interface. Two main contributions emerged from the research, first the research contributed to the field of mobile Human Computer Interaction. During the research, techniques of evaluating and improving usability of mobile applications were demonstrated. Secondly, the research made a significant contribution to the upcoming field of context-aware computing. The research brought clarity with regard to context-aware computing which is lacking in existing, current research despite the field’s proven impact of improving usability of applications. Researchers can utilise contributions made in this research to develop further techniques and usable context-aware solutions.
9

Online service design : a socio-technical perspective to engage an ageing population

Du Preez, Vikki January 2018 (has links)
Thesis (DTech (Design))--Cape Peninsula University of Technology, 2018. / As online environments become more cost effective, allow for more personalisation and often offer faster solutions, numerous service providers have shifted priority to the development of online user interactions. Many perceive this trend as positive, and welcome services that can be accessed online, anywhere, anytime. However, not all members of society favour the shift to online services, and resistance to technology and online services have been documented among ageing individuals. In order to design user interactions for ageing users more effectively, it is imperative to understand the normative changes that impact ageing users’ interactions with online services. The exploration of user perception and experience links to both physical and emotional involvement - documenting reactions such as frustration, fear, joy and excitement in relation to online services. The study focuses on the exploration of perceived interaction barriers among South African ageing users, as well as those interactions already perceived as appealing, contributing to new theoretical insights and a description of the sociotechnical context investigated in this study. The study is completed using a constructivist grounded theory method, with qualitative methods focused on user participation and co-design. In addition to the emerging substantive theory of Ageing User Decision-Determined Engagement (AUDDE), the study adds value to online service design practice by developing a deeper understanding of user perceptions and experiences, within a socio-technical context. Findings from the participatory research sessions informed a set of practical service design interaction guidelines, which can inform the design of more engaging online services for the ageing community. Methodologically the study explores the grounded theory method, within a design research framework, and establishes it as a suitable methodology to generate theory through design practice
10

Growing online community core conditions to support successful development of community in internet-mediated communities of practice /

Stuckey, Bronwyn. January 2007 (has links)
Thesis (Ph.D.)--University of Wollongong, 2007. / Typescript. Includes bibliographical references: p. 305-328.

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