The Effect of Twitter Use on Politicians’ Credibility and Attitudes toward Politicians

This study examined how Korean young adults evaluate the use of Twitter by Korean politicians, perceive politicians’ credibility, and evaluate politicians who use Twitter, and the relationships among these 3 variables. Although respondents gave slightly positive, but nearly neutral, answers to questions regarding Twitter use, perceived credibility, and overall evaluation of politicians, the model represented by these 3 variables fits the responses of young Korean voters. In other words, this study shows that attitudes toward the use of Twitter by Korean politicians positively influenced perceived credibility, which, in turn, positively influenced attitudes toward Twitter-using politicians. In addition, attitudes toward Twitter use directly influenced attitudes toward politicians in a positive way. The theoretical and practical implications of these findings are discussed in this article.     

A Vygotskian Approach to Heterogeneous Communication and Multi/cultural Literacy: Commentary on David Kellogg's “Taking Uptaking Up,or, a Deconstructionist ‘Ontology of Difference’ and a Developmental One”

In this commentary, I review Kellogg's comments on a recent editorial in the journal Mind, Culture, and Activity (Roth, 2008 Roth, W.-M. 2008. Realizing Marx's ontology of difference. Mind, Culture, and Activity, 15: 87–92. [Taylor & Francis Online] , [Google Scholar]). Concerning Kellogg's code-switching model for learning language, I present and exemplify a dialectic problem of multi/cultural literacy: the first articulation that crosses the boundaries of cultures and languages presupposes the heterogeneous Self and culture/ language in which the boundaries are already problematized. I take a Vygotskian approach and articulate that the heterogeneous nature of communicative performances constitutes the central aspect for this dialectic constitution of multi/cultural literacy. Therefore, I comment that ontology of difference constitutes the theoretical framework that explains development.     

A slacks-based measure of super-efficiency in data envelopment analysis: An alternative approach

The current paper proposes a slack-based version of the Super SBM, which is an alternative super-efficiency model for the SBM proposed by Tone. Our two-stage approach provides the same super-efficiency score as that obtained by the Super SBM model when the evaluated DMU is efficient and yields the same efficiency score as that obtained by the SBM model when the evaluated DMU is inefficient. The projection identified by the Super SBM model may not be strongly Pareto efficient; however, the projection identified from our approach is strongly Pareto efficient.     

Combinatorial Optimization in Real-Time Scheduling: Theory and Algorithms

Real-time computer systems are essential for many applications, such as robot control, avionics, medical instrumentation, manufacturing, etc. The correctness of the system depends on the temporal correctness as well as the functional correctness of the task executions. In order to assure temporal correctness it is necessary that the resources be scheduled to meet the temporal requirements of applications. When we consider the problem of nonpreemptive scheduling of a set of tasks in a processor for which no feasible solution exists, some tasks may have to be rejected so that a schedule can be generated for the rest. In this paper, we consider the problem of generating an optimal schedule such that the number of rejected tasks is minimized, and then the finish time is minimized for the accepted tasks. We propose to use an analytic approach to solve this problem. We first discuss the super sequence based technique which was originally proposed for reducing the search space in testing the feasibility of a task set. Then we show by the Conformation theorem that the super sequence constructed from the task set also provides a valid and reduced search space for the optimization problem. While the complexity of our scheduling algorithm in the worst case remains exponential, our simulation results show that the cost is reasonable for the average case.     

Mechanization in building construction projects: assessment and views from the practitioners

Abstract

While mechanization has been widely adopted in the current construction industry, little research has been done to assess the level of mechanization in building construction projects. The aims of this study are to propose a framework that can assess the level of mechanization in building construction projects, to develop a computer-based tool that can help assess mechanization levels, and to collect the views of industry practitioners regarding mechanization. To achieve these goals, a comprehensive literature review was conducted first, and based on which a six-layer assessment framework, namely Mechanization Index for Building Construction Projects, was proposed. After that, Mechanization Index Assessment Tool, a computer-based tool that can assess the level of mechanization in building construction projects, was developed. The developed tool was adopted in 14 construction projects in Singapore. Assessment results showed that the mechanization level of the projects was 48.54 percent out of 100, which is moderate. Results also reported that ‘site preparation’ and ‘underground piping’ were two work types that are more mechanized, while work types of ‘formwork’, ‘tiling’, and ‘painting’ were relatively less mechanized. Additionally, industry practitioners perceived that the mechanization levels in the current building construction projects and industry were moderate and more efforts should be put in this regard, especially from the perspective of the industry. This study is the first piece of research work that assesses the level of mechanization in building construction projects and thus, it contributes to the body of knowledge. Furthermore, the assessment tool developed can easily be used either by industry practitioners or by construction authorities to do mechanization assessment. Thus, this study contributes to the practice as well.     

Information sharing between the child welfare and behavioral health systems: Perspectives from four stakeholder groups

This qualitative study articulates the challenges, best practices, and facilitators to information sharing when addressing the behavioral health needs of children in out-of-home care. 13 interviews and nine focus groups were conducted to illuminate the perspectives of foster parents, mental health clinicians, provider agency social workers, and city-employed child welfare professionals. In total, 65 individuals participated in this qualitative study and data were analyzed using a modified grounded theory approach. Results indicate that challenges and best practices in cross-system information sharing articulated across the four stakeholder groups are attributed to variation in information accessibility, clarity in roles and protocols, ability in obtaining signatures for consent/release forms, and attitudinal differences towards collaboration. Implications to improve policy and practice are discussed.     

Newspaper Coverage of Christianity in South Korea, 1996–2005

This study analyzes a sample of 2,614 news articles dealing with religions published in Chosun Ilbo from 1996 to 2005, focusing on how this major newspaper covered Christianity in terms of its tone and frames. The results show that this religion was portrayed in a neutral or positive manner and that both Protestants and megachurches were mostly considered providers of social work services. These findings have implications for academic, media, and religious sectors.     

Policy transfer and role of policy entrepreneur in international aid: exploring international development cases of Korea and Vietnam

This paper looks at how an innovative policy comes to be transferred to another country and be successfully implemented. We explore three key dimensions (time, location, and people) in policy transfer studies using two cases of international aid (Saemaul Undong and e-Government projects). Utilizing a case study method, this paper upholds the predominant role of the policy entrepreneur over the environment (different time frame and different social, political, economic systems). The stakeholder analysis shows that policy entrepreneur’s role is critical in making policy transfer successful. In part, this argument is in line with previous “Advocacy Networks” studies, such as that of Keck and Sikkink (1998), highlighted the importance of policy entrepreneurs being able to navigate in the networks of international development. This paper aims to contribute to the literature by applying Dolowitz and Marsh’s policy transfer framework in the international aid context and calls for further empirical research employing the network analysis method.