Research productivity by career stage among Korean academics

This study explores Korean academics’ changes in research productivity by career stage. Career stage in this study is defined as a specific cohort based on one’s length of job experience, with those in the same stage sharing similar interests, values, needs, and tasks; it is categorized into fledglings, maturing academics, established academics, and patriarchs. Academics’ research productivity in each career stage is analysed, and these characteristics are compared across academic disciplines. In addition, the factors influencing research productivity in different career stages are examined. The results indicate that research productivity among academics changes according to their career stage, and its pattern differs across academic disciplines. Thus, there is a need to provide proper reward systems or career development programs in consideration of such differences.     

Early Childhood Preservice Teachers' Use of Verbal and Non-Verbal Guidance Strategies Across Classroom Contexts

Observations of preservice teachers often lack information about specific strategies they use when guiding children's behavior. This study investigated how preservice teachers used verbal and non-verbal behavior modification techniques within structured and transition classroom contexts. Using an on-the-mark 20-second observe and 10-second record method, eleven preservice teachers were observed in classrooms for two morning hours. A repeated measures MANOVA revealed two significant two-way interactions, which included types of modification techniques and types of contexts (Wilks's λ = .38, F(2, 9) = 7.37, p .05, Cohen's f = .88) and types of communication skills and types of contexts (Wilks's λ = .64, F(1, 10) = 5.53, p .05, Cohen's f = .74). Implications for future research and practice include more focused observations of preservice teachers and children's responses to various verbal and non-verbal strategies along with more education about how to use positive guidance strategies in real-life classroom situations.     

Validating students' library experience survey using rasch model

Few studies have investigated the psychometric property of new instruments developed locally to assess students' library experience, such as their behavior, perception and attitude toward library use. Validating a survey instrument is critical because using untested assessment instruments is more likely to lead to a lack of credibility in the results, as well as a lack of accuracy in the study's purpose (Sullivan, 2011). This study used data from a locally developed student library experience survey distributed in Spring 2018 at a large public research university library to examine undergraduate and graduate students' behaviors, attitudes and perceptions of library use. To test the validity of the survey as to whether six subdomains of the library experience survey contributed to a single construct, library experience, the study used Rasch model framework. This study contributes to the field as a first example using the Rasch model for library assessment purposes. Suggestions for best practices are discussed.     

How does intellectual property law affect the value creation process and strategies of database companies?

Abstract

This study demonstrates how changes in intellectual property law have effects on the value‐creation process of information commodity and related strategies. To explain these effects, three unique economic characteristics of databases as information are focused on: public good, information good, and aggregate good. And, different strategies such as versioning, technical strategies, and limiting the number of consumers and data mingling have been suggested for each characteristic. To examine the value‐création process of databases, a three‐step process has shown: data gathering, selection/arrangement, and presentation.

In the legal process, two main rationales, ‘sweat of the brow doctrine’ and ‘originality doctrine’ have suggested protecting database compilations. The ‘sweat of the brow doctrine’ stresses the effort and investment of the compiler. On the contrary, the ‘originality doctrine’ emphasizes the judgment and creativity in the selection and arrangement of the materials comprising the compilation.     

The bigger,the better? Measuring the financial health of media firms

Abstract

This study examined the degrees of product diversification of media conglomerates since the Telecommunications Act of 1996 and tested the impact of product diversification of the firms on their financial health. The strategy of related product diversification enables firms to gain market power and synergy effect, then improves financial performance. Based on that assumption, for a sample of 26 media firms from 1996 to 2002, this study conducted a regression analysis to test the hypotheses. The results showed two contradictory curvilinear models. First, revenue, EBITDA and sales growth rates revealed a U‐shaped relationship with diversification. That is, performance decreased as firms shifted from concentrated business strategies to related diversification, but performance increased as firms changed from related diversification to unrelated diversification. On the other hand, financial efficiency variables measuring management effectiveness or profitability (ROS, ROA and ROE) and stock market evaluation (earnings per share) showed an inverted U‐shape relationship. Thus, the unrelated diversification led to a decrease in financial efficiency.     

Cross-Cutting Effects of Hypertext Navigation on the Convergence of Attitudes

This study explores the navigation patterns of users reading hypertext-linked online news articles about a controversial issue. With the theoretical frameworks of selective exposure and cross-cutting exposure, the study examined the effects of individuals’ attitudes on their navigation patterns and consequent attitude changes after the news exposure. We asked 130 participants to read positive or negative news articles about the Korea–U.S. free trade agreement (FTA) by selecting six consecutive webpages. The results indicate that their attitudes toward the FTA was a significant predictor of their news selection, providing support for the selective exposure hypothesis. In terms of navigation patterns across the six news selection stages, the participants tended to select news articles that corresponded to their initial attitudes. The selection gap between participants with different attitudes increased until the fifth stage and ultimately converged. In terms of attitude change, the gap in the participants’ attitudes decreased sharply after their navigation.     

The impacts of science and technology policy interventions on university research: Evidence from the U.S. National Nanotechnology Initiative

We examine how the National Nanotechnology Initiative (NNI), a recent U.S. government science and technology (S&T) program launched in 2000, affects the nature of university research in nanotechnology. We characterize the NNI as a policy intervention that targets the commercialization of technology and a focused research direction to promote national economic growth. As such, we expect that the NNI has brought about unintended consequences in the direction of university–industry knowledge flows and the characteristics of university research output in nanotechnology. Using a difference-in-differences analysis of U.S. nanotechnology patents filed between 1996 and 2007, we find that, after the NNI, U.S. universities have significantly increased knowledge inflows from the industry, reduced the branching-out to novel technologies, narrowed down the research scope, and become less likely to generate technological breakthroughs, as compared to other U.S. and non-U.S. research institutions. Our findings suggest that, at least in the case of the NNI, targeted government S&T programs may increase the efficiency of university research, but potentially do so at a price.     

Cell-induced flow-focusing instability in gelatin methacrylate microdroplet generation

Photo-crosslinkable gelatin methacrylate (GelMa) microspheres are applicable to deliver cells or drugs in biological or biomedical applications. To fabricate GelMa microdroplets, a flow focusing technique with advantages of size control and rapid production was used in a T-junction microfluidic device. Instability played an important role in promoting microdroplet uniformity. 5 wt. % GelMa prepolymer solution mixed with cells affected cell-induced instability. At low flow rate ratio of GelMa to mineral oil below 0.200, stability was maintained regardless of GelMa concentration (5 and 8 wt. %) and cell presence, which led to uniform microdroplet generation. In contrast, instability at high flow rate ratio above 0.200 was worsened by cell presence and unstable jetting length, resulting in the generation of non-uniform cell-laden microdroplets. Therefore, the effect of cell-induced instability on microdroplet generation was minimized at a low flow rate ratio.     

Students’ perception of EdD and PhD programmes in Hong Kong

Abstract

The aim of this study is to explore the learning experiences of students enrolled on a Doctorate in Education programme in Hong Kong. The main questions are as follows. How do EdD students position themselves as doctoral candidates? How do EdD students experience their education in terms of scholarly expertise and scholarly identity? How do EdD students characterise their relationships with their supervisors? What perceptions do PhD students hold of the field of knowledge of EdD students and the value of an EdD degree? The data obtained from 10 semi-structured interviews in one selected institution are discussed with reference to the four main themes; distinction between EdD and PhD degrees: ‘co-existent’ vs. ‘separate’; positioning of EdD programme: title of doctor as ‘unfair’ vs. ‘deserved’; scholarly value: ‘insightful’ vs. ‘non-academic’; and relationship with supervisor: ‘independent and self-managed’ vs. ‘never equal, unlike the relationship between PhD student and supervisor’.