The short-run price-performance dynamics of microcomputer technologies

Models of technology growth are often conceived in terms of long-run trends in performance and price because, in general, short-run parameter stability and even the form of the growth function have proved elusive. Yet short-run growth models are arguably more useful for managers and research scientists, because the majority of their decisions are concerned with discretionary spending and operations rather than longer run strategic plans and investments. Our research explores short-run growth in microcomputer technologies by specifying growth models and parameter estimates for six commercially important computer technologies over short time periods with weekly data. Observations were acquired in a homogeneous market, limited to a collection time frame of less than two years. Data was collected at granular, weekly intervals, with concurrent tests to determine whether parameters were stable over successively longer intervals; conversely candidate growth models from longer ‘strategic’ planning horizons were tested to determine whether they scaled down to operational planning horizons. We found that an exponential model of performance-to-price growth is supported over short time horizons in all but one microcomputer technology (nonvolatile RAM). The exponential model and technology specific parameter estimates that are valid over short horizons were found to accurately scale up to longer planning horizons. We expect our results to contribute to more accurate price-performance forecasting at the corporate and product level; better decision making concerning inventory management, capacity utilization, lead and lag times in supply-chain operations, and efficiency of logistics.     

Exploring university-based teacher educators’ teaching beliefs and practice: a Hong Kong study

This study explores two higher education-based language teacher educators’ teaching beliefs and how they implemented their beliefs in classroom practice. Drawing on data from in-depth interviews and classroom observation, the findings revealed the teacher educators’ multiple and complex beliefs, which were derived from their past experiences and continued to be shaped and transformed through their professional work. The study also shows that while the participants tried to act in accordance with their beliefs in their teaching of teachers, they encountered some contextual obstacles (e.g. the ‘publish-or-perish’ system) which resulted in the gap between their beliefs and practice. Through their continuous reflections and agentive work, the teacher educators tried to close the gap and facilitate their students’ learning to teach. This study concludes with some implications for current teacher education and higher education on how to promote language teacher educators’ cognitive learning and continuous development.     

How open source software works: “free” user-to-user assistance

Research into free and open source software development projects has so far largely focused on how the major tasks of software development are organized and motivated. But a complete project requires the execution of “mundane but necessary” tasks as well. In this paper, we explore how the mundane but necessary task of field support is organized in the case of Apache web server software, and why some project participants are motivated to provide this service gratis to others. We find that the Apache field support system functions effectively. We also find that, when we partition the help system into its component tasks, 98% of the effort expended by information providers in fact returns direct learning benefits to those providers. This finding considerably reduces the puzzle of why information providers are willing to perform this task “for free.” Implications are discussed.     

Trust as an antecedent to knowledge sharing in virtual communities of practice

This study focusses on the role of trust in knowledge sharing within the context of virtual communities of practice. Trust is widely accepted as an important enabler of knowledge management (KM) processes. We conceptualise trust across three dimensions, namely: competence, integrity and benevolence; we test hypotheses as to the effect of these facets of trust on knowledge sharing by surveying an intra-organisational global virtual community of practitioners. The results indicate that all three dimensions of trust are positively related to knowledge-sharing behaviour. Trust based on the perceived integrity of the community was found to be the strongest predictor of knowledge-sharing behaviour. Our findings suggest that the dimensions of trust buttress each other; although they are theoretically distinct, they appear to be empirically inseparable. We propose that in order for knowledge sharing to be enabled, trust must concurrently exist in all three dimensions. Implication to organisations in their recruitment policy is to include competence, integrity and benevolence in their sought-for attributes of new employees. KM practitioners also have to encourage these attributes in existing employees, who are potential members of on-line communities of practice. Knowledge sharing itself was conceptualised with three components – quantity (frequency), quality (usefulness or value) and focus (the degree to which an individual feels that they engage in knowledge sharing). Of the three components, focus exhibits the most significant relationship with trust factors. This finding makes knowledge sharing less tangible than perhaps would be expected. It suggests that establishing whether knowledge has been shared is more than counting the frequency or trying to evaluate the usefulness of the shared knowledge. These aspects are important especially to management, but to the individual who shares knowledge, her feelings of having shared knowledge appear to be more important. With the current understanding that knowledge sharing is more of a human activity than technology, it is important that any information system should be assistive in boosting users’ confidence that they are indeed sharing knowledge. If the systems do not re-enforce the users’ knowledge-sharing orientation, knowledge sharing may be discouraged. Notwithstanding the point made about knowledge-sharing focus, it is necessary to take into consideration all the components of knowledge sharing to fully capture the concept. This was well indicated when the combined variable of all (rather than individual) knowledge-sharing items had the strongest correlation with trust factors.

     

Profiting from voluntary information spillovers: how users benefit by freely revealing their innovations

Empirical studies of innovation have found that end users frequently develop important product and process innovations. Defying conventional wisdom on the negative effects of uncompensated spillovers, innovative users also often openly reveal their innovations to competing users and to manufacturers. Rival users are thus in a position to reproduce the innovation in-house and benefit from using it, and manufacturers are in a position to refine the innovation and sell it to all users, including competitors of the user revealing its innovation. In this paper, we explore the incentives that users might have to freely reveal their proprietary innovations. We then develop a game-theoretic model to explore the effect of these incentives on users’ decisions to reveal or hide their proprietary information. We find that, under realistic parameter constellations, free revealing pays. We conclude by discussing some implications of our findings.     

Professor or Knowledge Worker? The Politics of Defining Faculty Work

To define “contractual regulations and institutional practices” for university faculty we need to consider significant changes in academic work in the last two decades. On the one hand, there persists the traditional view of disciplinary knowledge as valuable for its own sake; on the other, universities are a driving force in providing intellectual capital for the new knowledge society. While academic contracts have traditionally focused on defining work regulations and guidelines, faculty freedoms, tenure and so on, within the disciplinary framework, today these issues are deeply dependent on how the university's post‐Fordist organizational model (centralized controls, disaggregated models for managing knowledge) delivers knowledge in which symbolic and exchange values can play conflicting roles.     

The effect of redundant text in multimedia instruction

The purpose of this study was to examine the redundancy effects obtained when spoken information was duplicated in writing during the learning of a multimedia document. Documents consisting of diagrams and spoken information on the development of memory models were presented to three groups of students. In the first group, no written text was presented. In the second, written sentences redundant with the spoken information were progressively presented on the screen while in the third group, these written sentences were presented together. The results show that whatever the type of text presentation (sequential or static), the duplication of information in the written mode led to a substantial impairment in subsequent retention and transfer tests as well as in a task in which the memorization of diagrams was evaluated. This last result supports the hypothesis that the visual channel is overloaded as the cognitive theory of multimedia learning suggests.     

Environmental science education in a small island state: integrating theory and local experience

Abstract

The importance of education to address current sustainability challenges in small island states has been widely recognized. Environmental education may increase knowledge, while also increasing environmental awareness and motivating students to become agents of change. Student engagement in introductory environmental science courses may benefit from operationalizing abstract concepts by embedding course material and activities within this local context. Here, we describe an introductory course in environmental science that has been tailored to the local context of a small island state in the Caribbean. In addition to reaching academic course goals, pre- and post-course surveys showed that course participants’ environmental awareness increased on the dimensions ‘Personal Value System’ and ‘Willingness to Take Environmental Action’. The described course provides a template for the development of a low-cost introductory environmental science course that integrates general theory and application within the context of Caribbean island states.     

Improvement of instruction and teacher effectiveness: are student ratings reliable and valid?

This paper reviews the evidence on whether student ratings are reliable and valid enough to be used for the purpose of the improvement of instruction and teacher effectiveness. A consensus of evidence available in the literature tends to show a measure of consistency, stability and validity of student ratings. Several variables such as sex of rater and ratee, class size, mood of students, rank of instructors, grades students were expecting, time of the day courses are taught, to mention only a few, have been found to have a low to high positive relationship, with student ratings. It also appears that the use of student ratings leads to the improvement of instruction, provided the evaluation data are fed back to the instructor and that an expert or consultant provides assistance to the instructor.