Do Caregivers’ Health Conditions Impact Children’s Externalizing Behavior? The Roles of Caregivers’ Parenting Frustration and Family Cohesion

Child and Adolescent Social Work Journal - The present study aimed to explore whether caregivers’ parental frustration mediates the relationship between parental health and children’s...     

A Strong Limit Theorem for Weighted Sums of Negatively Dependent Random Variables

In this article, we establish a new complete convergence theorem for weighted sums of negatively dependent random variables. As corollaries, many results on the almost sure convergence and complete convergence for weighted sums of negatively dependent random variables are obtained. In particular, the results of Jing and Liang (2008 Jing, B.Y., Liang, H.Y. (2008). Strong limit theorems for weighted sums of negatively associated random variables. J. Theor. Probab. 21:890–909.[Crossref], [Web of Science ®] , [Google Scholar]), Sung (2012 Sung, S.H. (2012). Complete convergence for weighted sums of negatively dependent random variables. Stat. Pap. 53:73–82.[Crossref], [Web of Science ®] , [Google Scholar]), and Wu (2010) can be obtained.     

The Challenges of Governing Biotechnology in Korea

This paper explores the development of biotechnology governance and current challenges to its improvement in Korea. It aims to identify what element would be crucial to foster an effectively working system of biotechnology governance in Korea. The analysis is focused on two cases, the legislation of the Bioethics and Biosafety Act, and the development of ethical, legal, and social implications (ELSI) research. Our analysis finds that communication and consensus building between scientists and bioethics advocates in a broader sense is critical for improved governance. During the prolonged dispute over this legislation, the stakeholders advocating scientific advancements and those emphasizing the importance of ethics did not reach an agreement, which was reflected in the limitations of the act. The nascent ELSI research attempted to facilitate interdisciplinary communication and understanding between biotechnology scientists and those in humanities and social sciences, but was met with only limited success. Good governance of biotechnology requires scientists and other stakeholders to willingly comply with regulations and internalize certain norms. Based on our experience in ELSI research, a few suggestions are made to contribute to this end.     

An Ecological Approach to Understanding Peer Victimization in South Korea

This article analyzes the common and serious problem of peer victimization in South Korean (hereafter referred to as Korean) schools using Bronfenbrenner's ecological model. We conceptualize peer victimization within Korean culture, then identify and examine risk factors that operate simultaneously within and between five system levels: the micro-, meso-, exo-, macro-, and chrono-systems. Theories that explain relationships between the risk factors and peer victimization also are discussed. Finally, we draw implications from our ecological analysis for assessing, preventing, and treating peer victimization in Korean schools.     

Ecological Influences on School Achievement in a Diverse Youth Sample: The Mediating Role of Substance Use

This study's purpose was to examine the extent to which closeness to family, peers, and school was associated with substance use and school achievement, based on the integrative model of ecological theory, social attachment theory, and social learning theory. A secondary data analysis was conducted on the first wave of the National Longitudinal Study of Adolescent Health (Add Health). The final sample yielded 3,147 boys and 3,356 girls.

A structural equation model was employed to test a hypothesized model. School closeness was found to be a primary ecological factor that significantly influenced school achievement while substance use emerged as a critical mediator of this relationship. Family closeness was negatively associated with school achievement. Also, substance use did not have a mediating function in the relationship between peer closeness and school achievement. No gender difference was found, except the relationship between family closeness and school achievement, in that family closeness had a significant, direct effect on school achievement among only boys but not girls.

The findings suggest that schools should strengthen adolescents' tie to school to promote their better academic success and to prevent them from substance use.     

Parenting Success and Challenges for Families of Children with Disabilities: An Ecological Systems Analysis

This article examines factors that are associated with parenting success for caregivers of children with disabilities using Bronfenbrenner's ecological systems framework. Although numerous studies have investigated risk factors for negative parenting among caregivers of children with disabilities, there are relatively few research findings on parenting success. More specifically, we examine factors for parenting success within the context of micro- (parenting practices, parent-child relations), meso- (caregivers' marital relations, religious social support), and macro-systems (cultural variations, racial and ethnic disparities, health care delivery system), which is then followed by implications for social work practice.     

An Ecological Approach to Understanding Youth Violence: The Mediating Role of Substance Use

The authors tested an ecological model that posits mediating variables (substance use and mental health) in the association between ecological factors (family closeness, school closeness, and peer closeness) and youth violence in a sample of 4,783 adolescents. Models including substance use present significantly less total effect between ecological factors and youth violence than do models without substance use. Additional probing of significant mediation effect using the Sobel test was performed and suggested that substance use did function as a mediator in the hypothesized path. Considerations of adolescent violence should recognize the possible role of ecological factors and how their influence may vary by substance use.     

Fast algorithms for computing the tripartition-based distance between phylogenetic networks

Consider two phylogenetic networks and ’ of size n. The tripartition-based distance finds the proportion of tripartitions which are not shared by and ’. This distance is proposed by Moret et al. (2004) and is a generalization of Robinson-Foulds distance, which is orginally used to compare two phylogenetic trees. This paper gives an -time algorithm to compute this distance, where h is the number of hybrid nodes in and ’ while k is the maximum number of hybrid nodes among all biconnected components in and ’. Note that $k \ll h \ll n$ in a phylogenetic network. In addition, we propose algorithms for comparing galled-trees, which are an important, biological meaningful special case of phylogenetic network. We give an $O(n)$-time algorithm for comparing two galled-trees. We also give an -time algorithm for comparing a galled-tree with another general network, where h and k are the number of hybrid nodes in the latter network and its biggest biconnected component respectively.     

Security Assurance: How Online Service Providers Can Influence Security Control Perceptions and Gain Trust

Security researchers agree that security control is a difficult to observe credence quality of online services that Internet users cannot easily assess through research or experience. Yet there is evidence that users form perceptions of security control that strongly determine how much trust they put in online services. This study investigates whether users’ security control perceptions arise solely from their predispositions or whether online service providers can influence them. The study also examines whether these seemingly undependable perceptions of security control lead to trust or whether more traditional factors might offer a better explanation of trust under security risks. To address these issues, this study proposes a new theory of security assurance that integrates the frameworks of trust and quality signals. The results show that rather than being guided by predispositions, users appear to mainly assess security control based on indirect cues controlled by service providers. Importantly, Internet users do not treat the credence quality of security the same way they treat qualities that can be understood through search and experience. Although returning users develop security control perceptions and trust from the usual heuristics of ongoing relationships, they also continue to evaluate market information about service providers like they do in new relationships. The proposed model offers a new perspective of how users respond to the uncertain and technically challenging qualities prevalent in online services.