A Decomposition Approximation for Periodic Kanban-Controlled Flow Shops*

The kanban system is a pull method of production control in which the material-handling operation between two stations is initiated by the downstream station. Most often, because of limited transportation resources, the physical distance separating workstations, or other factors, the material-handling operation is performed periodically. The number of withdrawal kanbans must be set large enough to satisfy production requirements over the period between occurrences of the material-handling operation-the withdrawal cycle time. This paper presents a decomposition approximation for kanban-controlled flow shops that explicitly considers the withdrawal cycle time. Several examples are given to show how the approximation method can be used to determine the required number of kanbans, the required withdrawal cycle time, or both.     

Asian American Interracial and Interethnic Marriages: Differences by Education and Nativity1

Using the 1990 U.S. census data, we apply log‐linear models to examine Asian Americans' interracial marriage with whites and interethnic marriages between Asian ethnic groups. Japanese and Filipino Americans are most likely to marry whites, followed by Chinese and Korean Americans. Southeast Asian and Asian Indian Americans are least likely to marry whites. We further explore how interracial marriage differs by couples' educational and nativity combinations. The impact of educational attainment, generally, is very strong but is modest for Japanese Americans, the most assimilated group, and for Southeast Asian Americans, the least assimilated group. Interracial marriage is more likely for native than for immigrant couples, but immigrants marrying natives are more likely to marry whites than persons of their own ethnic group. Interethnic marriage between Asian ethnic groups is limited to several ethnic groups, but is much more frequent among natives than among immigrants. Japanese and Chinese Americans, who have lived in the United States for several generations, have the highest rate of interethnic marriage. We have shown two forms of integration for Asian Americans – integration into mainstream society through interracial marriage for both immigrants and natives and integration into Asian American pan‐ethnicity through interethnic marriage for later‐generation natives.     

Social services for sexual minority youth: Preferences for what,where, and how services are delivered

As part of an internet-based study to investigate experiences of sexual minority youth in the U.S., 544 youth, ages 14–19, were surveyed about their need for services, where they preferred to receive these services, and their preferred method of service delivery. The survey was anonymous and youth were recruited from LGBTQ-specific listservs and venues as well as through social networking sites as a way of reaching youth often not represented in LGBTQ surveys. Youth highly endorsed many types of services, settings, and modes of delivery. Some subgroup differences emerged. Transgender youth and those uncertain about their gender identity expressed stronger interest than others in services to address stress, family issues, and self-defense, and in receiving support and guidance from LGBTQ adults. Few differences in service preferences along demographic lines such as race/ethnicity emerged; however, African American youth were more likely than others to prefer services offered in a place of worship. Contrary to predictions, geographic and community variables were not related to service type, delivery format, or location preferences.     

Forming Effective Employee Information and Consultation: A Five‐Stage Trust and Justice Process

In this paper we show how trust and justice influence the efficacy of employee information and consultation (I&C) bodies. Evidence is drawn from a 2‐year qualitative study of I&C participants in two organizations in the UK. The research builds on Dietz and Fortin's conceptual five‐stage model of the I&C process to provide a more nuanced understanding of I&C trust and justice outcomes. In particular, we point to crucial stages in the process, and how these influence the effectiveness of I&C mechanisms. Implications for theory and practice are discussed.     

Beyond the Abolition of Dual Administration: The Challenges to NGO Governance in 21st Century China

VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - The abolition of dual administration of non-governmental organizations (NGOs) in China is an inexorable and essential...     

Intergenerational pathways leading to foster care placement of foster care alumni's children

This study examined a path model that postulated intergenerational relationships between biological parent psychosocial functioning and foster care alumni mental health, economic status and social support; and from these to the likelihood of children of foster care alumni being placed in foster care. The sample included 742 adults who spent time in foster care as children with a private foster care agency and who reported having at least one biological child. A full pathway was found between poorer father's functioning to greater alumni depression, which was in turn associated with negative social support, and then a greater likelihood of child out‐of‐home placement. Other parent to alumni paths were that poorer father functioning was associated with alumni anxiety and post‐traumatic stress disorder (PTSD), and poorer mother's mental health was associated with PTSD; however, anxiety and PTSD were not implicated as precursors of foster care placement of the child. Findings support the need for increased practice and policy support to address the mental health needs of parents of children in or at risk of foster care, as well as the children themselves, as family history may have a lasting influence on quality of life, even when children are raised apart from biological parents.     

The impact of generation and country of origin on the mental health of children of immigrants

The authors reexamine the study of generational differences in adjustment among the children of immigrants by arguing that the country of origin defines and shapes the adaptation process across generations. Using a sample of children in Toronto, the authors demonstrate that generational differences in the mental health of children occur only in families from countries of origin at the lowest levels of economic development. Among those at the lowest levels of economic development, a mental health advantage in the first generation evolves to a disadvantage in the 2.5 generation relative to third or later generational children. Children from backgrounds characterized by higher economic development show no initial or eventual differences from the native born. Using data from the Toronto Study of Intact Families, the authors are able to explain differences among children from low economic development backgrounds specifically in terms of increasing family conflict and decreasing school involvement across generations.     

Attitudes Toward Younger and Older Adults: An Updated Meta-Analytic Review

This meta-analytic review of 232 effect sizes showed that, across five categories, attitudes were more negative toward older than younger adults. Perceived age differences were largest for age stereotypes and smallest for evaluations. As predicted by social role theory ( Eagly, 1987 ), effect sizes were reduced when detailed information was provided about the person being rated. The double standard of aging emerged for evaluations and behavior/behavioral intentions, but was reversed for the competence category. Perceptions depended on respondent age also. Results demonstrated both the multi-dimensionality and the complexity of attitudes toward older adults ( Hummert, 1999 ; Kite & Wagner, 2002 ).     

Social Psychologists' Expertise in the Public Interest: Civilian Morale Research During World War II

By reviewing the careers of three prominent social psychologists, Floyd Henry Allport, Daniel Katz, and Rensis Likert, this article describes the theoretical and practical psychological expertise that American psychologists developed before, during, and after World War II and describes how this expertise resulted in significant gains for the field of social psychology. Prior to World War II, Allport, Katz, and Likert made pioneering contributions to understanding issues relevant to society, to the science of social psychology, and to methods of attitude measurement and poll design. In response to World War II, each of the three pursued research topics more immediately connected to the war effort. Similar to other prominent social psychologists, Allport, Katz, and Likert were able to parlay their prewar reputations into significant, high-level roles in the service of the World War II effort. In turn, these successes helped to lay the foundation for a postwar boom in social psychology that had implications for training in and research on social psychology. Nonetheless, social psychology's and society's utilization of the knowledge gained during World War II appears to have been less than optimal.     

Condoms and Contexts: Profiles of Sexual Risk and Safety Among Young Heterosexually Active Men

Heterosexual men's sexual safety behavior is important to controlling the U.S. epidemic of sexually transmitted infections (STIs), including human immunodeficiency virus (HIV). While sexual safety is often treated as a single behavior, such as condom use, it can also be conceptualized as resulting from multiple factors. Doing so can help us achieve more nuanced understandings of sexual risk and safety within partner-related contexts. We used latent class analysis with data collected online from 18- to 25-year-old heterosexually active U.S. men (n = 432) to empirically derive a typology of the patterns of sexual safety strategies they employed. Indicators were sexual risk-reduction strategies used in the past year with the most recent female sex partner: condom use, discussing sexual histories, STI testing, agreeing to be monogamous, and discussing birth control. We identified four subgroups: Risk Takers (12%), Condom Reliers (25%), Multistrategists (28%), and Relationship Reliers (35%). Partner-related context factors—number of past-year sex partners, relationship commitment, and sexual concurrency—predicted subgroup membership. Findings support tailoring STI prevention to men's sexual risk-safety subgroups. Interventions should certainly continue to encourage condom use but should also include information on how partner-related context factors and alternate sexual safety strategies can help men reduce risk for themselves and their partners.