Chen-Huei Chou

A study of Facebook Groups members’ knowledge sharing

Abstract There have been many studies focusing on individuals’ knowledge sharing behavior in the organizational setting. With the rapid prevalence of social networking sites, many people began to express their thoughts or share their knowledge via Facebook website. Facebook is an open environment which does not provide any immediate monetary benefits to its users. Its Groups members’ knowledge sharing behavior could be different from the ones in organizations. We proposed a research model to examine factors which promote the Facebook Groups users’ willingness to share knowledge. The factors in the study include extrinsic motivation, social and psychological forces, and social networking sharing culture. We used PLS to test our proposed hypotheses based on 271 responses collected through an online survey. Our results indicated that reputation would affect knowledge sharing attitude of Groups members and sense of self-worth would directly and indirectly (through subjective norm) affect the attitude. In addition, social networking sharing culture (fairness, identification, and openness) is the most significant factor, not only directly affecting knowledge sharing intention, but also indirectly influencing the sharing intention through subjective norm and knowledge sharing attitude.

Ontology for Developing Web Sites for Natural Disaster Management: Methodology and Implementation

Recent natural disasters have highlighted the need for disaster preparedness, planning, and management. Hurricane Katrina demonstrated the usefulness of Web sites in dealing with natural disasters. However, little is known about the necessary contents and structures of Web-based information systems for natural disaster management. In this paper, we focus on developing an ontology structure of elements for Web-based disaster management systems. Web elements are identified, following a grounded-theory approach, from an inventory of 6032 Web pages drawn from 100 disaster management Web sites. Selected semi-structured data representation approaches are used to organize the resulting ontology structure, which consists of 2094 Web elements. The ontology structure is further coded into a Web-based system, allowing easy online access.

A text mining approach to Internet abuse detection

As the use of the Internet in organizations continues to grow, so does Internet abuse in the workplace. Internet abuse activities by employees-such as online chatting, gaming, investing, shopping, illegal downloading, pornography, and cybersex-and online crimes are inflicting severe costs to organizations in terms of productivity losses, resource wasting, security risks, and legal liabilities. Organizations have started to fight back via Internet usage policies, management training, and monitoring. Internet filtering software products are finding an increasing number of adoptions in organizations. These products mainly rely on blacklists, whitelists, and keyword/profile matching. In this paper, we propose a text mining approach to Internet abuse detection. We have empirically compared a variety of term weighting, feature selection, and classification techniques for Internet abuse detection in the workplace of software programmers. The experimental results are very promising; they demonstrate that the proposed approach would effectively complement the existing Internet filtering techniques.

An exploratory study of product placement in social media

Purpose – The purpose of this paper is to focus specifically on the examination of factors influencing the effectiveness of product placement in social media. Design/methodology/approach – Two field experiments were used to test research models and questions. In each experiment, random sampling was used to assign volunteers into groups, controlled by different experimental settings. Questionnaires were distributed to the volunteers in order to collect their attitude toward advertisement, brand impression, and intention to click the advertisement. Their browsing behavior was measured by click through rate, browse depth, and browsing time. Findings – The paper found that the effects of product placement conducts (product prominence and presentation) in social media are similar to the effects of product placement in other media. Also, a match between the vehicle and product would create deeper browsing depth and longer browsing time on the product web site. Product placement on a higher awareness vehicle wou...

Ontology-based evaluation of natural disaster management websites: a multistakeholder perspective

In recent years, the world has witnessed a number of severe natural disasters, causing heavy losses to families, communities, and even nations. Natural disaster management (NDM) websites play an important role in assisting people through various disaster stages. However, such websites are complex and there is little research on standards and guidelines for their development and evaluation. In this paper, we develop an ontology-based evaluation tool to assess the utility of NDM websites. Two main groups of stakeholders-- experts who are in charge of NDM websites and potential users of such websites--contributed to the process. A total of 73 experts validated the ontology developed for NDM web elements through a Delphi study. These experts also provided importance ratings for web elements in the ontology. In a survey of the second major group of stakeholders--potential users--818 participants provided another set of importance ratings for web elements in the ontology. The design theory in this work is based on utility theory. The metrics for the evaluation of websites are relative utility and absolute utility. Using the evaluation tool, we evaluated the NDM websites of the 50 U.S. states from the perspectives of the two groups of stakeholders. The results indicate a lack of readiness in most of these websites.

Metrics in Evaluating Software Defects

Due to the popularity of mobile devices and increasing demands of software applications, more and more individual developers join this industry. However, software defects top at the cost of software development. Software metrics are able to show some indication of software defect. This paper reviews popular static code and object-oriented metrics and summarizes heuristics for using the metrics. Correlations between software defect and metrics are presented. Finally, advantages and disadvantages of metrics are discussed.According to the summary of correlation analyses, some metricsshow inconsistent relationships with software defect. Implications to practice and research are provided.

When natural disasters strike: managing individual and organisational needs with web-based systems

Increased impacts and frequency of recent natural disasters have given rise to the need for finding new ways to enhance disaster preparedness, planning and management. Web-based information systems have demonstrated the usefulness of websites in recent disasters. However, little is known about the contents of web-based information management for disaster management and the needs and requirements of those who use it. In this paper, we focus on identifying the contents of a web-based disaster management system from the perspectives of multiple stakeholders (victims and aid providers), the needs the system should meet, and crisis behaviours that the system should anticipate. We propose two conceptual models to investigate how these categories of web-design elements could enhance victims’ coping mechanisms and reduce impacts of natural disasters on individuals (Model 1) and businesses (Model 2). Extending the theories of task-technology fit and self-efficacy, we propose the concepts of need-web element fit, behaviour-web element fit, and disaster self-efficacy. We formulate an assessment model for dealing with the effectiveness of the proposed design. The contribution of this work is in assisting organisations, managers, and individuals involved in disaster management to create effective and efficient web-based tools that prepare for disasters and deal with the aftermath of disasters once they occur.

Design and Implementation of jAHP: A Java-based Analytic Hierarchy Process Application

a multiple criteria decision making problem by a group of decision makers in different geographical locations could be hard. Analytic Hierarchy Process is a mathematical model capable of dealing with such type of problems. However, the lack of geographical support is the major drawback of a traditional standalone Analytic Hierarchy Process tool. To address this issue, this paper proposes to adopt Java programming language to design and implement jAHP, a Java-based Analytic Hierarchy Process application available over the Internet. External validity is accessed by comparing jAHP results with both manual approach and commercial software. KeywordsHierarchy Process (AHP), Java Programming, JTree