Scheduling in a Management Context: Uncertain Processing Times and Non-Regular Performance Measures*

Decision makers often face scheduling problems in which processing times are not known with certainty. Non-regular performance measures, in which both earliness and tardiness are penalized, are also becoming more common in both manufacturing and service operations. We model a managerial environment with task processing times (which include sequenceindependent set-up times) prescribed by three-parameter lognormal distributions. Upon completion, each task derives a reward given by a particular piecewise-linear reward function. The objective is to select a sequence of tasks maximizing the expected total reward. The relative generality of the problem renders many enumerative methods inapplicable or computationally intractable. To overcome such difficulties we develop efficient priorityinduced construction (PIC) heuristics which build up a complete schedule by inserting tasks (singly from a list) into a partial sequence of tasks. In each partial and complete sequence a period of idle time is permitted prior to the first task. Performance on realistic-sized problems is very encouraging, with cost penalties averaging less than one percent.     

“I Really Belong Here”: Civic Capacity-Building among Returning Citizens

This article focuses on unlikely movement actors whose civic engagement has been understudied: people with criminal records (“returning citizens”). We present findings from 18 months of ethnographic research with members (leaders) of Fighting to Overcome Records and Create Equality (FORCE), a civic group led by returning citizens. FORCE leaders received institutional support from Community Renewal Society (CRS), a larger faith and community-based organization, to lead a rights reform movement in Chicago. Findings suggest that FORCE leaders constructed notions of kinship, recognition, and power through civic capacity-building efforts—and that social belonging was core to such capacity-building efforts. While bonding social belonging occurred as FORCE leaders formed kinship with people facing similar social and economic marginality, bridging social belonging emerged as leaders felt recognized by CRS staff organizers, affiliates, and elected officials. Bonding and bridging social belonging enabled FORCE leaders, who faced constant social exclusion in society, to experience much needed kinship, recognition, and power. Future studies should continue to uncover how local capacity-building processes have life-changing relational effects on movement participants from socially and economically marginalized groups.     

Vendor Selection with Bundling*

Product bundling has become increasingly prevalent not only in consumer goods but also in the industrial sector. We study a purchasing problem in which a buyer must obtain necessary numbers of various stock items from a variety of vendors who charge different prices, have limited capacities and different levels of quality, and offer bundled products at discounted prices. We examine relationships among different bundling scenarios and show that the most general scenario is one in which free items are given to the buyer when sufficient quantities are purchased. We develop a mixed integer linear program that finds the purchasing strategy for the buyer that minimizes the total purchase cost. We present computational results which indicate that the problem is very tractable to solve optimally on a personal computer with standard optimization software. Finally, three extensions of the model are discussed.     

Perceived facilitators and barriers to saving among low-income youth

Asset-based social welfare programs focus on helping low- to moderate-income citizens to accumulate wealth in the form of homeownership, savings, small businesses, and higher education. Individual development accounts, savings accounts in which account holders’ deposits are matched, are a vehicle often used in these programs. In a national demonstration of individual development accounts for children (children's savings accounts), low-income youth were interviewed to learn what helped them to save and what made it difficult to save. We describe the young people's perceptions of these factors, and conclude with implications for policy and program design.     

Social norms: Does it matter whether agents are rational or boundedly rational?

The motivation for this paper is to consider whether changes in conformity over time are likely to depend critically on agent behavior. To get some insight on this we use the framework of Chamley [Chamley, C., 1999. Coordinating regime switches. The Quarterly Journal of Economics 114, 869–905] and compare the dynamic of conformity in a setting where agents are rational to one where they are adaptive (or backward looking). This is followed by a more general discussion on the issue.     

“It’s a generosity loop”: Religious and spiritual motivations of volunteers who glean produce to reduce food insecurity

Food insecurity is a common social issue and households look to assistance from food pantries, which often have difficulty supplying fresh or nutritious food. A substantial amount of produce is left in the fields, which can be collected through gleaning. In a focus group with volunteer gleaners at a faith-based nonprofit organization that attempts to fill the gaps of food insecurity, the motivations, challenges, and benefits of volunteering were examined. Volunteering in gleaning generated a sense of collective purpose and community; it addressed deeply held religious and spiritual impulses; and it puts volunteers directly in contact with nature.     

The role of social work field education programmes in the transmission of developmental social work knowledge in Southern and East Africa

This paper reports on the findings of a study on the role of social work field education programmes in the transmission of developmental social work knowledge in Southern and East Africa. It highlights the challenges in locating developmental social work placements and the creativity shown by social work educators in addressing these challenges and improving learning opportunities for social work students. Both academics and students were found to be committed to developmental social work, within a willing practice environment hampered by knowledge, capacity and resource constraints. Social work education was found to be playing a transformative role through the teaching of a developmental social work curriculum and the creation of collaborative developmental social work learning experiences. Social work educators trained and supported agency supervisors in developmental social work, while students served as conduits, modelling developmental social work practice. What has yet to be determined in future research is the students’ perspective of this developmental educational environment.     

Personal reflection and experience of a Fulbright Scholar: teaching a mental health course in Vietnam’s changing culture

This paper documents the experience of developing and teaching a course on mental health for undergraduate social worker students during a semester in Vietnam. Social work is a profession at the early stages of development in Vietnam, requiring much curriculum development. There are over 40 universities with undergraduate social work education programs, but few of the faculty have had training or experience in practicing social work. The paper will summarize the main reasons for developing such a course given the current state of mental health need and services in a changing culture, as well as the current state of professional social work education and the newly established profession of social work. The author describes the contexts underlying the course—the status of social work and social work education in Vietnam, the context of mental health and mental illness in Vietnam, and curriculum adaptation to the cultural context. From this experience, the lessons learned about the role of cross-cultural critical thinking, cultural knowledge, and other strategies will be discussed about teaching a subject like mental health internationally.     

(Dis)locating nations in the World Cup: football fandom and the global geopolitics of affect

The World Cup, as a tournament that pits national teams against one another, initially seems to be a site where support for sports is tied to nations. However, situating this sporting event at the intersection of discourses of globalization, transnational circulation of capital and populations, and theories of fandom, our examination of diasporic populations found that the choice is not a simple one between ‘origin nation’ and ‘residence nation.’ Instead, the decision of which team to support relies much more on an attenuated, complex notion that we call transnational affinity. We examine this concept in relation to the context of transnational flow of players, media, spectators, and capital, contending that locating nations or national preference in the World Cup requires understanding the contemporary de- or trans-nationalization of not only sports but identity itself beyond the binary of national and global.