Information navigation and knowledge discovery in virtual communities

Over the past decade, advances in the Internet and media technology have literally brought people closer than ever before. It is interesting to note that traditional sociological definitions of a community have been outmoded, for community has extended far beyond the geographical boundaries that were held by traditional definitions (Wellman & Gulia, 1999). Virtual or online community was defined in such a context to describe various forms of computer-mediated communication (CMC). Although virtual communities do not necessarily arise from the Internet, the overwhelming popularity of the Internet is one of the main reasons that virtual communities receive so much attention (Rheingold, 1999). The beginning of virtual communities is attributed to scientists who exchanged information and cooperatively conduct research during the 1970s. There are four needs of participants in a virtual community: member interest, social interaction, imagination, and transaction (Hagel & Armstrong, 1997). The first two focus more on the information exchange and knowledge discovery; the imagination is for entertainment; and the transaction is for commerce strategy. In this article, we investigate the function of information exchange and knowledge discovery in virtual communities. There are two important inherent properties embedded in virtual communities (Wellman, 2001):

Panel data, cointegration, causality and Wagner's law : empirical evidence from Chinese provinces

This paper tests Wagner's law of increasing state activity using panels of Chinese provinces. The paper's main methodological contribution is in that we employ for the first time in the literature on Wagner's law a panel unit root, panel cointegration and Granger causality testing approach. Overall, we find mixed evidence in support of Wagner's law for China's central and western provinces, but no support for Wagner's law for the full panel of provinces or for the panel of China's eastern provinces.

Evolving insight into high-dimensional data

ISOMap is a popular method for nonlinear dimensionality reduction in batch mode, but need to run its entirety inefficiently if the data comes sequentially. In this paper, we present an extension of ISOMap, namely I-ISOMap, augmenting the existing ISOMap framework to the situation where additional points become available after initial manifold is constructed. The MDS step, as a key component in ISOMap, is adapted by introducing Spring model and sampling strategy. As a result, it consumes only linear time to obtain a stable layout due to the Spring model’s iterative nature. The proposed method outperforms earlier work by Law [1], where their MDS step runs within quadratic time. Experimental results show that I-ISOMap is a precise and efficient technique for capturing evolving manifold.

Socratic teaching, the law and professional identity

This paper uses critical discourse analysis of interactions between law students and their lecturer to show how ‘Socratic’ teaching is used as a powerful technique to shape student identities. Data from a moot or simulated court in taxation law is analysed to show how students position themselves and are positioned as legal professionals. The paper argues that one student’s poor performance in the moot can be interpreted as resistance to attempts to influence her to adopt an uncongenial speaking position. This example supports the view that the difficulty law students have in learning to ‘think like a lawyer’ results not from a failure of skill but from the problems they have in assuming the speaking position of a legal professional. It is suggested that educators should consider helping students come to terms with the fragmented and contradictory subject positions associated with professionalisation.

A causal analysis for the expenditure data of business travelers

Determining the causal relation among attributes in a domain
is a key task in the data mining and knowledge discovery. In this
paper, we applied a causal discovery algorithm to the business traveler
expenditure survey data [1]. A general class of causal models is adopted in
this paper to discover the causal relationship among continuous and discrete variables. All those factors which have direct effect on the expense
pattern of travelers could be detected. Our discovery results reinforced
some conclusions of the rough set analysis and found some new conclusions which might significantly improve the understanding of expenditure behaviors of the business traveler.

Zero impact: are lawyers' values affected by law school?(Survey)

In 2001 approximately 700 Australian final-year undergraduate law students were surveyed as the first part of a three-year study of Australian lawyers' values. This study is being undertaken in an effort to understand what values are important in determining lawyers' attitudes to difficult behavioural choices confronting them in legal practice. It is hoped that knowledge of the actual values held by lawyers (in the context of critical professional choices) will enable better targeted values awareness education in both pre- and post-admission contexts.

The main quantitative survey employed a number of hypothetical scenarios. These were designed through the use of ethical dilemmas to examine issues of conflicting loyalties within a context of self-interest and lawyers' perceived obligations to the community, employers, family, friends and clients. (1)

Our approach in this paper is to set the scene by providing basic frequencies to responses in each scenario, followed by an analysis of themes elicited from respondents during the focus groups. Our immediate objective is to provide representative interviewee (that is, respondent) commentary designed to throw some light on the major choices of those respondents in the first year of the main quantitative survey. (2) Note that these focus groups were conducted some months after the quantitative analyses, and in particular after respondents had left law school. All respondents were, by that stage, working within a variety of legal workforce environments. In this analysis, it must be stressed, we have not attempted to match and compare individual respondents' comments with their earlier choices in the quantitative survey. That task awaits the longitudinal analysis now under way for the whole period of data collection during the three-year study.

Job stress in the law enforcement sector: comparing the linear, non-linear and interaction effects of working conditions

This study addresses a gap in much of the research involving stress among high-risk occupations by investigating the effects of linear, non-linear and interaction models in a law enforcement organization that has undertaken a series of efficiency-driven organizational reforms. The results of a survey involving 2085 police officers indicated that the demand-control-support model provided good utility in predicting an officer's satisfaction, commitment and well-being. In particular, social support and job control were closely associated with all three outcome variables. Although the demand × control/support interactions were not identified in the data, there was some support for the curvilinear effects of job demands. The results have implications for the organizational conditions that need to be addressed in contemporary policing environments where new public management strategies have had widespread affects on the social and organizational context in which policing takes place.

Nurturing regulatory compliance: Is procedural justice effective when people question the legitimacy of the law?

Procedural justice generally enhances an authority's legitimacy and encourages people to comply with an authority's decisions and rules. We argue, however, that previous research on procedural justice and legitimacy has examined legitimacy in a limited way by focusing solely on the perceived legitimacy of authorities and ignoring how people may perceive the legitimacy of the laws and rules they enforce. In addition, no research to date has examined how such perceptions of legitimacy may moderate the effect of procedural justice on compliance behavior. Using survey data collected across three different regulatory contexts – taxation (Study 1), social security (Study 2), and law enforcement (Study 3) – the findings suggest that one's perceptions of the legitimacy of the law moderates the effect of procedural justice on compliance behaviors; procedural justice is more important for shaping compliance behaviors when people question the legitimacy of the laws than when they accept them as legitimate. An explanation of these findings using a social distancing framework is offered, along with a discussion of the implications the findings have on enforcement.

Did workchoices deliver? Evidence from survey data

The introduction of the Workplace Relations (WorkChoices) Amendment Act 2005 (Cwlth) proved to be one of the most contentious changes to federal labour law in Australia's history. There is considerable debate as to whether it fulfilled the government's expectations of giving 'flexibility' and 'choice' to both employees and employers or whether it resulted in an overall deterioration in working conditions. In order to assess the impact of WorkChoices on Australian businesses and their employees, this study reports data from a survey of 5,600 human resource professionals throughout Australia. Despite the limitations of the survey, the survey evidence reveals that most human resource professionals did not report any significant changes in productivity, job creation or work family balance as a consequence of the new workplace laws. Moreover, only a minority expected an improvement over the next 3 years.

Can education add value to values? A study of law students

In the global market place the value of education takes on many meanings. In transnational education forums it relates to the market’s assessment (in dollar terms) of a qualification. But can we measure the value-addedness of tertiary education in existential terms? Can we measure the value that tertiary education provides to the enhancement of societies as a whole?

This study attempts to investigate what values are characteristic of Australian lawyers in their last year of law school. It is part of a larger longitudinal study, which aims to determine how values develop or degrade over time and what effect, if any, tertiary education can have in building and perpetuating ‘appropriate’ professional values? Results show that differing values sets do significantly predict behavioural choices on ethical questions presented to participants. The implications of results are discussed in the contexts of ethics education in a tertiary context, and applications for the professions.

Data monitoring sensor network for bignet research testbed

Equipped with recent advances in electronics and communication, wireless sensor networks gained a rapid development to provide reliable information with higher Quality of Service (QoS) at lower costs. This paper presents a realtime tracking system developed as a part of the ISSNIP BigNet Testbed project. Here a GPS receiver was used to acquire position information of mobile nodes and GSM technology was used as the data communication media. Moreover, Google map based data visualization software was developed to locate the mobile nodes via Internet. This system can be used to accommodate various sensors, such as temperature, pressure, pH etc., and monitor the status of the nodes.

Forensic accounting and Benford's law

An article [1] in the Journal of Forensic Accounting reviewed the background and development of forensic accounting using Benford’s Law (BL)—an interesting property in natural occurring numbers that can help identify fraudulent data in corporate financial records. The field of forensic accounting, and this law in particular, are relevant in light of several recent events that required the identification of false or otherwise misrepresented information in corporate financial statements. Such information was used or intended to be used to fraudulently misappropriate company funds, cover up illegal transactions, or evade taxation. In this article, we comment on forensic accounting and BL from a signal processing (SP) perspective.

Dematerialised data and human desire : the Internet and copy culture

Since Licklider in the 1960s [27] influential proponents of networked computing have envisioned electronic information in terms of a relatively small (even singular) number of 'sources', distributed through technologies such as the Internet. Most recently, Levy writes, in Becoming Virtual, that "in cyberspace, since any point is directly accessible from any other point, there is an increasing tendency to replace copies of documents with hypertext links. Ultimately, there will only need to be a single physical exemplar of the text" [13 p.61]. Hypertext implies, in theory, the end of 'the copy', and the multiplication of access points to the original. But, in practice, the Internet abounds with copying, both large and small scale, both as conscious human practice, and also as autonomous computer function. Effective and cheap data storage that encourages computer users to keep anything of use they have downloaded, lest the links they have found, 'break'; while browsers don't 'browse' the Internet - they download copies of everything to client machines. Not surprisingly, there is significant regulation against 'copying' - regulation that constrains our understanding of 'copying' to maintain a legal fiction of the 'original' for the purposes of intellectual property protection. In this paper, I will firstly demonstrate, by a series of examples, how 'copying' is more than just copyright infringement of music and software, but is a defining, multi-faceted feature of Internet behaviour. I will then argue that the Internet produces an interaction between dematerialised, digital data and human subjectivity and desire that fundamentally challenges notions of originality and copy. Walter Benjamin noted about photography: "one can make any number of prints [from a negative]; to ask for the 'authentic' print makes no sense" [4 p.224]. In cyberspace, I conclude, it makes no sense to ask which one is the copy.