Pool‐Point Distribution of Zero‐Inventory Products

We study zero‐inventory production‐distribution systems under pool‐point delivery. The zero‐inventory production and distribution paradigm is supported in a variety of industries in which a product cannot be inventoried because of its short shelf life. The advantages of pool‐point (or hub‐and‐spoke) distribution, explored extensively in the literature, include the efficient use of transportation resources and effective day‐to‐day management of operations. The setting of our analysis is as follows: A production facility (plant) with a finite production rate distributes its single product, which cannot be inventoried, to several pool points. Each pool point may require multiple truckloads to satisfy its customers' demand. A third‐party logistics provider then transports the product to individual customers surrounding each pool point. The production rate can be increased up to a certain limit by incurring additional cost. The delivery of the product is done by identical trucks, each having limited capacity and non‐negligible traveling time between the plant and the pool points. Our objective is to coordinate the production and transportation operations so that the total cost of production and distribution is minimized, while respecting the product lifetime and the delivery capacity constraints. This study attempts to develop intuition into zero‐inventory production‐distribution systems under pool‐point delivery by considering several variants of the above setting. These include multiple trucks, a modifiable production rate, and alternative objectives. Using a combination of theoretical analysis and computational experiments, we gain insights into optimizing the total cost of a production‐delivery plan by understanding the trade‐off between production and transportation.     

Interventions: Dynamics of Contention

This profile looks at the indigenous mobilization against government attempts to open up the Peruvian Amazon to increased foreign investment. It draws parallels between the events in Peru and conflicts in countries such as Mexico, Bolivia and Ecuador. It identifies the main similarities as the causes of the conflict (neoliberal reform), the action repertoire deployed in the protests, and the successful outcome of the action for the indigenous groups involved. We also look at the sources of support for the struggle, focusing in particular on the role played by political leaders such as Ollanta Humala and Bolivian President Evo Morales. We conclude by analysing the consequences of the protests for the wider political situation in Peru.     

‘Young People Took to the Streets and all of a Sudden all of the Political Parties Got Old’: The 15M Movement in Spain

This profile looks at the emergence of the 15M Movement in Spain. It analyses the role played by social networks in the movement's formation and identifies the grievances that mobilised a broad coalition of groups and individuals including dissatisfaction with the two-party political system, the venality of political and economic elites, widespread corruption, the economic crisis and the politics of austerity. The profile also looks at the action repertoire employed by the movement and its organisational structure. In terms of the former, it focuses attention on the role played by protest camps and assemblies in giving a voice to the excluded and building the bonds of solidarity necessary to sustain activists through protest. In terms of organisation, it describes a structure that is highly decentralised, has been influenced by protest movements in other parts of the world such as Latin America and has marked regional differences. It concludes with observations about what the 15M means for Spanish politics and the direction it might take in its struggle against the political and economic elites that have dominated Spain since the transition to democracy in the 1970s.     

Measuring Marital Satisfaction: A Comparison of the Revised Dyadic Adjustment Scale and the Satisfaction with Married Life Scale

Marital satisfaction has been psychometrically measured using many different instruments not soundly based on theory. The Revised Dyadic Adjustment Scale (RDAS), consisting of 14 items, is commonly accepted by researchers and practitioners to measure marital satisfaction but was not specifically designed to measure marital satisfaction. The Satisfaction with Married Life Scale (SWML), consisting of five items, is a short scale specifically targeted toward measuring marital satisfaction. An online sample collected from 1,187 couples throughout the United States was used to compare these instruments' correlation (r = .782), factor structures, reliability (SWML, α = .958; RDAS, α = .943), theoretical foundation, and validity. These instruments are on parity with each other when measuring marital satisfaction; however, each instrument yields implications for practitioners and researchers desiring to measure marital satisfaction.     

The place of “think family” approaches in child and family social work: Messages from a process evaluation of an English pathfinder service

Findings are reported from a process study of an English multi-disciplinary team working with families with long standing and complex problems. The approaches and methods of the team are described and placed in the context of UK policy developments and of UK and USA research on professional practice with families facing multiple difficulties. Basic data are provided on all families referred in the first year and analysed with respect to the first 100 completed cases. A broadly ethnographic research approach is used for the observational study of the team interactions and decision-making on individual cases. For a one-third sub-sample of 33 cases, process and interim outcome data are analysed from information systematically extracted from case records. These are complemented by qualitative data from interviews with managers and caseworkers and by observation of ‘team around the family’ and professionals' meetings. The researchers conclude that the service succeeds in engaging a majority of the referred families who have been hard to reach or hard to change in the past and whose children are either ‘on the edge of care’ or likely to be significantly harmed without the provision of an intensive service. The researchers concluded that improvements were made in the life chances of children in 75% of the families. Aspects of the service identified as associated with more positive outcomes are: the allocation of two key workers (one for the child/ren and one for the parent/s); the centrality of relationship-based practice and flexibility of the approach rather than strict adherence to any particular practice model; the fact that the service is firmly embedded within the statutory children's services department, allowing for continuity of relationships with team around the family members when the intensive service ends; and flexibility about case duration and intensity.     

The Influence of Gaming Expenditure on Crime Rates in South Australia: A Local Area Empirical Investigation

Although there has been much speculation about the possible links between gambling and crime rates, relevant quantitative evidence has been practically non-existent in Australia to date. This paper reports the results of research that utilised a model designed to investigate the potential relationship between electronic gaming machine expenditures and property (income-generating) crime rates reported to police in local areas in South Australia in 2002–2003. The research found that the higher the expenditures on gaming machines in a particular local area per adult, the higher the income-generating crime rate in that area. No such relationship was found between gaming machine expenditure and non-income-generating crime rates. However, further research is required before any policy-relevant conclusions can be drawn.     

Pregnant women's attitudes toward the abortion of defective fetuses

A survey asked 190 pregnant women their opinions on whether a hypothetical other woman would be justified in having an abortion under ten different circumstances, four of which related to abnormalities of the fetus. They were then asked whether they would be justified in having an abortion under these same circumstances. Also assessed were these women's views concerning the justifiability of abortion for a specific group of fetal abnormalities, neural tube defects. Respondents were more likely to view abortion as justifiable for a hypothetical other than for themselves. However, there was no evidence that pregnant women's views about abortion are more conservative than those of the general public. The majority of respondents considered abortion of a defective fetus to be justified, both for themselves and for others. The best predictor of abortion attitudes was respondent's views about the ideal number of children in a completed family.This research was supported by a grant from Maternal and Child Health Research, Bureau of Community Health Services, DHHS. Reprint requests should be sent to Dr. Ruth Faden at the Johns Hopkins University School of Hygiene and Public Health, Division of Health Education, 615 N. Wolfe Street, Baltimore, MD 21205.