Period analysis of variable stars by robust smoothing

Summary.  The objective is to estimate the period and the light curve (or periodic function) of a variable star. Previously, several methods have been proposed to estimate the period of a variable star, but they are inaccurate especially when a data set contains outliers. We use a smoothing spline regression to estimate the light curve given a period and then find the period which minimizes the generalized cross-validation (GCV). The GCV method works well, matching an intensive visual examination of a few hundred stars, but the GCV score is still sensitive to outliers. Handling outliers in an automatic way is important when this method is applied in a 'data mining' context to a vary large star survey. Therefore, we suggest a robust method which minimizes a robust cross-validation criterion induced by a robust smoothing spline regression. Once the period has been determined, a nonparametric method is used to estimate the light curve. A real example and a simulation study suggest that the robust cross-validation and GCV methods are superior to existing methods.     

Commitment and performance of nonprofit board members

Boards of nonprofit organizations are entrusted to oversee and ensure that the organization remains true to its mission, functions within the confines of state and federal laws, and operates in a financially responsible manner. This critically important oversight is carried out by volunteers. This study examined the relationships between board member commitment and individual performance. Commitment was assessed using Meyer and Allen's Three‐Component Model of Commitment: Affective, Continuance, and Normative (1991). The population in this study was volunteer board members of midsized, social service nonprofit organizations in the Orange County, California, area. The strongest findings were between affective commitment and performance in board roles. Committed board members reported more involvement and are perceived by the executive to be more engaged and valuable. Analysis revealed that executive judgments of participation are based on both board member behavior and Affective commitment expressed by the board member.     

Assessment of Teen Pregnancy Prevention Interventions Among Middle School Youth

The purpose of this study was to examine outcomes for students enrolled in two teen pregnancy prevention programs: the Youth Asset Development Program (YADP); and the Postponing Sexual Involvement Program (PSIP) and identify possible areas for program refinement. The study design consisted of two sets of comparisons: (a) sixth-grade students who completed the PSIP versus the control school; and (b) the YMCA Success Centers where the YADP was introduced versus the control school. Two hundred thirty-seven students were selected to participate in the study. Students who participated in the prevention programs had significantly (p < .05) higher academic achievement, participation in school related activities, and enjoyed school much more than students from the control school. However, no statistically significant differences were found between program participants and the control group when they were compared on personal orientation and judgments about teenage parenthood. Implications for program modification and program effectiveness are discussed.     

保健生心理障碍现状及运动疗法研究

目前 ,国家对弱势群体越来越关注 ,怎样让他们融入到社会中去是一个极大的社会问题。保健生无疑是高校中的弱势群体之一 ,但现在对普通高校保健生的研究还很少 ,在保健生的心理障碍研究方面几乎还是空白。作者针对这一现状 ,在西华大学保健生的心理障碍问题上 ,进行情况调查与分析 ,并根据调查研究结果 ,开出运动处方 ,对运动疗法进行了研究     

An Interview with Stanford M. Forrester, Editor and Publisher of bottle rockets

A little haiku zine / from Connecticut / who would have guessed? This installment of “They Might Be Giants” focuses on bottle rockets, a small haiku journal from, that's right, Connecticut. Stanford M. Forrester, publisher and editor of bottle rockets, talked briefly with Michael Brown about poetry, fireworks, and why he does what he does. Serials Review 2003; 29:321–324.     

Gender, Educational Credentials, Contributions and Career Advancement: Results of a Follow-up Study in Hospital Pharmacy*

La présente étude sur les pharmaciens en milieu hospitalier démon-tre que, depuis 20 ans, ce que l'on qualifie de «perspectives d'avenir>> présentées par ce secteur en pleine expansion attire un nombre disproportionné de femmes, dont la plupart sont tenues à l'écart lorsqu'il s'agit d'avancement professionnel. Même si les détentrices de qualifications postbaccalauréats ont accédéà de meilleurs postes de premier échelon, elles ont néanmoins perdu l'avantage pendant la première décennie de leur carrière, ce qui correspond aux résultats de recherches préalables réalisées sur les professions non féminisées. Cette situation semble indiquer que ce sont des facteurs liés au sexe, et non à la productivité, qui influent de façon négative sur les per-sonnes qui sont en mesure d'accorder les avancements; de la même manière, au moment de l'embauche pour des postes de premier échelon, ce sont les qualifications plutôt que la productivité qui influent sur leurs décisions.
This study of hospital pharmacists shows that the "opportunity" presented by this rapidly-expanding field over the past 20 years differentially attracted women, most of whom became ghettoized in terms of career advancement. Those women who acquired post-baccalaureate educational credentials obtained better entry-level positions, but, consistent with previous research on less-feminized professions, lost this advantage over the first decade of their careers. The pattern of advancement suggests that gender-related factors serve as a "negative signal" to gatekeepers, irrespective of productivity, just as credentials serve as a signal or proxy for productivity in hiring for entry-level positions.     

Opportunities and challenges doing interdisciplinary research: what can we learn from studies of ethnicity,inequality and place?

ABSTRACT

This Special Issue Introduction critically reflects on the interdisciplinary working project on ethnicity, inequality and place undertaken by the ESRC Centre on Dynamics of Ethnicity. We argue that CoDE is uniquely placed to undertake this interdisciplinary work and discuss the extent to which the project pushed thinking beyond that of our disciplinary homes to provide innovative insights into the significance of place for understanding ethnic inequalities and identities. From the six papers in the Special Issue, this Introduction identifies four cross-cutting themes on ethnicity and place: processes of exclusion, the importance of temporal context and change, tensions of scale in the way ethnicity and place together shape experiences and inequalities, and the conceptualisation of ethnicity as dynamic, multi-faceted and socially constructed. We argue that the project has succeeded in terms of cross fertilisation of ideas, challenging ontological and epistemological divisions, and facilitating interdisciplinary learning, adaptation and appreciation. We also identify difficulties that were experienced. We suggest that interdisciplinary ideas flourish in an environment where they can fail and conflict, but where failure and conflict does not disrupt the underlying momentum of the work. We conclude in favour of interdisciplinary, democratic and co-produced research as a tool for social change.     

The rise and fall of the ‘inner city’: race,space and urban policy in postwar England

ABSTRACT

In postwar England, the ‘inner city’ has loomed large in urban discourse and policy, serving as an important site through which ‘race’ has been rendered socially and spatially meaningful. Drawing on insights from history, geography and sociology, this paper traces the material and symbolic processes through which the ‘inner city’ has been the subject and object of socio-political knowledge and action. The article examines what shifting understandings of the ‘inner city’ and related policy responses reveal about the racialisation of space and bodies, and the role of the state in rationalising and enacting specific urban imaginings and interventions. In historicising dominant conceptions of the ‘inner city’, we identify three periods revealing key transformations within this formation: firstly, we consider how the idea operated as a spectre, in which the American ‘ghetto’ was seen as a predictor of ‘race relations’; secondly, we contend that during the 1970s and 1980s, the ‘inner city’ came to be ‘territorialised’ as a pathological, racialised space subject to particular modes of institutional regulation; finally, we examine the relative fragmentation of the ‘inner city’ in recent decades, through urban regeneration and changes in the spatialisation of ‘race’ and ethnicity.     

Professional remittances: how ageing returnees seek to contribute to the homeland

ABSTRACT

This article uses ageing Taiwanese returnees to illustrate how older migrants draw on their accumulated knowledge, experiences, and networks in their host society to contribute to their home society. Drawing on data collected from life history interviews with ageing return migrants, I argue that changing notions of social membership across life stages, coupled with the working experiences that professional middle-class migrants accumulate in the destination society, motivate ageing expatriates to return and devote their later lives to their home society. Specifically, I highlight how ageing migrants seek to bridge the gap between their ancestral and destination societies, further prompting social and cultural changes transnationally. Nevertheless, the extent to which ageing returnees can change their home society is conditioned by structural constraints already in place. Many ageing returnees cannot make as many changes as they would like, since they, as individuals, have trouble bringing about structural changes that require collective efforts. It is against this backdrop that many older returnees develop narratives of Americanisation (and insufficient Americanisation) to explain the difficulties that they encountered when trying to contribute to Taiwan. These narratives point to a hierarchy that ageing returnees believe exists between American and Taiwanese society.