A semi-parametric approach to robust parameter design

Parameter design or robust parameter design (RPD) is an engineering methodology intended as a cost-effective approach for improving the quality of products and processes. The goal of parameter design is to choose the levels of the control variables that optimize a defined quality characteristic. An essential component of RPD involves the assumption of well estimated models for the process mean and variance. Traditionally, the modeling of the mean and variance has been done parametrically. It is often the case, particularly when modeling the variance, that nonparametric techniques are more appropriate due to the nature of the curvature in the underlying function. Most response surface experiments involve sparse data. In sparse data situations with unusual curvature in the underlying function, nonparametric techniques often result in estimates with problematic variation whereas their parametric counterparts may result in estimates with problematic bias. We propose the use of semi-parametric modeling within the robust design setting, combining parametric and nonparametric functions to improve the quality of both mean and variance model estimation. The proposed method will be illustrated with an example and simulations.     

Private companies' engagement in the labour market integration of refugees: An exploratory study of the city of Stuttgart,Germany

Private companies of all sizes may engage in the integration of refugees into the labour market. Taking the case study of the highly industrialised German city of Stuttgart, this study explores the motivation of (a) private large-scale international enterprises including (automotive and high-tech companies) and (b) family-owned small- to medium-sized companies (private social enterprises, suppliers to the automotive industries, architecture, and engineering companies) to do so. The research further explores the companies' challenges, opportunities and the lessons learned throughout the process. Utilising the principles of Grounded Theory, a qualitative case study approach is applied with in-depth interviews with private companies, civil society, public private partnerships and experts. The findings show that the arrival of a large number of refugees during 2015/2016 has increased the engagement of the companies, increased their cooperation with other sectors, and has correspondingly led to some innovative initiatives in refugees' labour market integration and policy advocacy. The call for the engagement of the private sector and the existence of employment-related policies such as tolerated work permits (Ausbildungsduldung/Beschäftigungsduldung) were essential to create sufficient incentives for private companies to engage in the training and employment of refugees. However, the insecure residence permits and bureaucratic procedures in the public sector mostly discouraged their engagement. Our research shows that the two company types had different possibilities, different approaches towards refugees and faced different challenges while engaging in refugee labour market integration.     

Openness in adoption: Challenging the narrative of historical progress

One significant change in adoption practice that has occurred over the last four decades is the shift away from an expectation of confidentiality towards an expectation of openness in adoption. Openness is typically conceived in terms of the level of contact between adoptive and birth families following adoption or the extent to which adoption is openly discussed within the adoptive family. While these shifts in practice have generated controversy, they are largely supported by research evidence and have become a feature of contemporary adoptive family life. As a result, the narrative that has emerged in relation to openness in adoption is one of historical progress. In this paper, I argue that the lived reality of adoption is less straightforward than this narrative suggests. An analysis of the social and cultural context in which adoption operates suggests instead that the persistent feature of adoption throughout this historical period of increasing openness can be more accurately described as a state of enduring ambiguity regarding the nature of post‐adoption relationships. The paper highlights the potentially damaging consequences of overlooking this aspect of adoptive family life and comments on the role of policy in shaping openness in adoption.     

Impact of physical activity on activity of daily living in moderate to severe dementia: a critical review

The objectives of this study were to describe the different modalities of physical activity programs designed for moderate to severe dementia and to identify their impact on functional independence in activities of daily living (ADL). A critical review of randomized controlled trials related to the impact of physical activity programs in moderately to severely demented persons on ADL performance and meta-analysis of the identified studies were performed. Among the 303 identified articles, five responded to the selection criteria. Four out of the five studies demonstrated limited methodological quality. In one high-quality study, physical activity programs significantly delayed deterioration of ADL performance. The program components and ADL assessment tools vary widely across studies. Although the proposed treatments have not proven their efficiency in improving the ADL status of the patients, they were able to limit the decline in ADL functioning. Future research is warranted in order to identify clinically relevant modalities for physical activity programs for people with moderate to severe dementia.     

Book review

New Zealand and the European Union edited by Matthew Gibbons. Auckland, Pearson Education. 2008. 172 p. NZ$52.99 (paperback). ISBN 0733993831.

Going bush. New Zealanders and nature in the twentieth century by Kirstie Ross. Auckland, Auckland University Press. 2008. 200 p. NZ$34.99 (paperback). ISBN 1869404246.

Globalisation and the wealth of nations by Brian Easton. Auckland, Auckland University Press. 2007. 248 p. NZ$50.00 (paperback). ISBN 9781869403775.     

Use of a conceptual model of societal drivers of ecological change in South Florida: Implications of an ecosystem management scenario

Human-dominated ecosystems such as in South Florida's Everglades region are greatly affected by societal actions and choices, and efforts to restore degraded ecosystems must take into account the societal drivers of ecosystem change. A conceptual model of societal-ecological interactions within the region illustrates connections between major societal drivers, such as water management and land use, and ecological stressors, such as loss of habitat and nutrient loading. Using the conceptual model as an initial guide for discussion, examination of a restoration scenario for the region shows that social and economic effects from activities proposed in a restoration scenario will likely affect most sectors of South Florida. Political effects from changing land and water management practices likely will be significant, as will the physical effects of changing water structures and management practices. Conceptual models such as this can aid in the initial stages of ecosystem restoration discussions and can assist in planning for subsequent social science evaluations of specific societal impacts of actual proposed governmental restoration alternatives. In crafting restoration scenarios, local, regional, and national decision makers can use conceptual models such as this to help broaden the early considerations of how possible future changes in societal drivers, including management choices, will change ecological stressors that affect ecosystem health.     

A movement of ‘subsidized capitalists’? The multi-level influence of the Bharatiya Kisan Union in India

This paper investigates the relationship between the state and India's rural informal sector by focusing on the collective mobilizations of middle-sized agricultural producers in Western Uttar Pradesh. These cultivators are involved in an economic sector which is at the same time capitalist, largely informal but also, to some extent, state-regulated. Through their mobilizations organized by the Bharatiya Kisan Union (BKU), they have attempted to influence state regulation of agricultural markets, obtaining increased input subsidies and better procurement prices for their produce, and thus an increase in the rates of return and profitability of their farming activity. The paper conceptualizes the modality of production of these farmers as ‘subsidized capitalism’, alluding to the self-employed and self-funded producers with holdings large enough to support a pair of bullocks defined as ‘bullock capitalists’ by Lloyd and Susanne Rudolph (1987), while denoting the crucial role of public subsidies in preserving this faction of informal agrarian capitalism. The paper also points to the ambivalent relationship between the ‘subsidized capitalists’ of Western Uttar Pradesh and the state: although they seek protection from the central government in the context of globalization, they confront and contest local state institutions by deploying collective strategies to distort local regulations of agricultural markets.     

The Technologisation of Childhood? Young Children and Technology in the Home

We describe an 18-month empirical investigation of three- and four-year-old children's uses of technology at home, based on a survey of 346 families and 24 case studies. The findings are reported in the context of social commentators' anxieties about the ways in which childhood is being transformed by technology. Although we report evidence of some parental disquiet about the role of technology in children's lives, we illustrate some of the complexities in families' attitudes to, and uses of, technology and conclude that it is not perceived by parents to be the threat to modern childhood that is claimed.     

Hopes and Fears: Teenage Mothers’ Experiences of Intimate Partner Violence

Research has shown that pregnancy and motherhood increase the risk of experiencing intimate partner violence (IPV) — physical, sexual and emotional — in relationships. Much of this research, however, explores this issue in relation to adults and little attention has been given to the experiences of pregnant teenagers or teenage mothers in violent relationships. This paper focuses on three main areas to explore this, disadvantage, sexual negotiations and stigma, and draws upon interviews conducted by the authors with 16 teenage mothers in the UK as part of a wider study about IPV in the relationships of disadvantaged young people.