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.     

Impacts of Home Modifications on Aging-in-Place

The purpose of this study is to analyze the relationship between home modifications and aging-in-place. Using the ENABLE-AGE United Kingdom sample (N = 376), the authors hypothesize that seniors who have modified their housing are likely to have stayed longer in their current housing. There is a positive relationship between home modifications and aging-in-place. The results underscore the importance of supportive environment to prolong living in housing settings.     

Using the dependent wild bootstrap for the nonparametric goodness-of-fit test for density functions

In this paper, we consider the well-known nonparametric consistent model-specification test for the stationary density function (see [Aït-Sahalia Y. Testing continuous-time models of the spot interest rate. Rev Financ Stud. 1996;9:385–426; Li Q. Nonparametric testing of closeness between two unknown distribution functions. Econ Rev. 1996;15:261–274; Fan Y, Ullah A. On goodness-of-fit tests for weakly dependent processes using kernel method. J Nonparametric Stat. 2000;11:337–360]) and reinvestigate it carefully using asymptotics and simulation. Our work reveals that the test is subject to power and size distortions, which are mainly caused by dependence or convergence rate changes under the null and alternative hypothesis. A dependent wild bootstrap is newly suggested as a feasible remedy to such distortions. Our result provides a complete explanation as well as a solution to the problem that experienced by Aït-Sahalia [Testing continuous-time models of the spot interest rate. Rev Financ Stud. 1996;9:385–426], that is, that the test rejects true models too often when independent and identically distributed asymptotic critical values are used.     

The effect of charitable giving by celebrities on the personal public relations

This study examined how charitable giving by entertainment celebrities influences celebrity personal public relations. Survey participants showed positive attitudes toward charitable giving. Attitudes toward charitable giving positively influenced celebrity credibility perception. Credibility also influenced attitudes toward the celebrities, which in turn positively influenced the purchase intention of their performance. Also, attitudes toward charitable donations were positively associated with attitudes toward the celebrities. Scholars and practitioners need to note charitable giving as an efficient and strategic personal public relations factor and method.     

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.     

Great walls over African rivers: Chinese engagement in African hydropower projects

Recent acceleration of Chinese engagement in African hydropower is attracting increasing attention and concern. Yet there is scant research and little reliable data on this engagement. This article analyses Chinese hydropower engagement based on a new, verified dataset. We examined over 100 projects reported by the media and lists compiled by other organizations, amassing case studies for each project using desk research, interviews and field visits. We demonstrate that Chinese engagement in African hydropower is often overestimated in both numbers and value. Further, misunderstanding and myths abound regarding Chinese financing and construction practices. This evidence‐based understanding provides a firmer foundation for advocacy, research and efforts by other companies and funding agencies to co‐operate with Chinese actors in this controversial sector.     

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.