Clustering objects on subsets of attributes (with discussion)

Summary.  A new procedure is proposed for clustering attribute value data. When used in conjunction with conventional distance-based clustering algorithms this procedure encourages those algorithms to detect automatically subgroups of objects that preferentially cluster on subsets of the attribute variables rather than on all of them simultaneously. The relevant attribute subsets for each individual cluster can be different and partially (or completely) overlap with those of other clusters. Enhancements for increasing sensitivity for detecting especially low cardinality groups clustering on a small subset of variables are discussed. Applications in different domains, including gene expression arrays, are presented.     

Hiding in Plain Sight

Abstract

“The Scarab” (1907), a sprawling Shingle-style house in Wellesley, Massachusetts, was built by poet and professor Katharine Lee Bates as a home for herself and her partner Katharine Coman, a social economist and labor activist. Both women had lived and taught at Wellesley College, founded as a single-sex institution for higher education in 1870, for over a quarter of a century. In their new home they adapted many of its hybrid spaces for living and working, surrounding themselves with friends, family, colleagues, and students to form a lively and engaged community of women. While it decisively broke with familiar conventions in both plan and program, “The Scarab” nonetheless fits comfortably in its leafy, suburban neighborhood, demonstrating that this committed couple could “hide in plain sight” while radically queering the terms of early-twentieth-century domesticity.     

The eternal triangle: cost, access, and quality

No matter who is in charge of health policy, no matter what his or her ideological bent, no matter whether the economy is in boom or bust, three concerns stubbornly dominate the discussion: the cost of care, access to care, and the quality of care. The main variation among them is that normally each in turn receives the most attention from policy makers, payers, and the public, over time.     

Using a Community Participatory Research Approach to Understand Satisfaction with Psychopharmacology Among Families of Children with Psychiatric Co-Morbidities

How do parents of children with psychiatric co-morbidities perceive their children’s use of psychiatric medications? To learn more, the Parent/Professional Advocacy League of Massachusetts (PAL), representing families of children with mental health needs, collaborated with researchers on a community-based participatory research (CBPR) study. A questionnaire assessed satisfaction with psychiatric medication as it pertained to children with psychiatric co-morbidities (n = 212). Satisfied parents were likely to employ alternative therapies and feel that prescribers had informed them about medication use and side effects. Results reinforce the need for prescribers to discuss psychopharmacology with families. CBPR improved study relevance and supported PAL’s advocacy efforts.     

Physical activity and cognitive-health content in top-circulating magazines, 2006-2008

Physical activity may promote cognitive health in older adults. Popular media play an important role in preventive health communication. This study examined articles discussing associations between physical activity and cognitive health in top-circulating magazines targeting older adults. 42,753 pages of magazines published from 2006 to 2008 were reviewed; 26 articles met inclusion criteria. Explanations regarding the link between physical activity and cognitive health were provided in 57.7% of articles. These explanations were generally consistent with empirical evidence; however, few articles included empirical evidence. Physical activity recommendations were presented in 80.8% of articles; a wide range was recommended (90-300 min of physical activity per wk). Socioeconomic status and education level were not mentioned in the text. Results suggest an opportunity for greater coverage regarding the role of physical activity in promoting cognitive health in popular media. Magazine content would benefit from including more empirical evidence, culturally sensitive content, and physical activity recommendations that are consistent with U.S. guidelines.     

Horizons for strategic planning

In this paper we present a normative model for setting time horizons for planning. Provided that certain conditions are met, we can state that only part of the future is relevant for present strategic planning, and a study of the future beyond that time horizons is a waste of resources.Following the introduction the impact of predetermined planning horizon on planning is discussed. Next, the model is presented: the problem is defined, developed and solved. The discussion of the model is designed to incorporate—and to show its implication on—existing views and methods for setting time horizons for strategic planning. Thus, simplifying assumptions which facilitate the mathematical solution of the problem, are discussed and relaxed in order to show how realistic situations are illuminated by the model.     

“There are Two People at Work that I'm Fairly Certain are Black”: Uncertainty and Deliberative Thinking in Blind Race Attribution

Geneticists, biologists, social scientists, and humanist scholars have powerfully critiqued race as a stable set of biological categories. Despite this, in everyday life, race is consistently assumed to be visually available in physical features. Racial categories also continue to be used in scientific and social scientific research as if they were self‐evident and real. In this study, I examine the role of visual perception in the construction of racial categories and their recalcitrance in everyday thought and interaction. My observations are based on in‐depth interviews with 25 blind people, which highlight the unique features of their nonvisual, non‐appearance‐based experiences of race.     

Suburban landscape: Views of New Jersey artists 1

Suburban landscape predominates within New Jersey; people live in one suburb and drive to a job in another. Research on community ideologies suggests, however, that even suburban residents have vague images of suburbs. Vague images can mean, in turn, that the state's visual artists produce few images that incorporate the newly‐created suburban landscape that they see every day. Research on art worlds also suggests little encouragement for work that depicts the newer suburbs. Consistent with this, only a few of the visual artists living in New Jersey who have put slides in three large slide files include work that deals with the newer suburban landscape or with the process of creating suburbs. Instead, artists who depict New Jersey landscape concentrate on the state's “natural” landscape or on the state's older industrial suburbs. The privacy of newer suburbs no doubt also contributes to this pattern. In suburbs, even places designed for crowds, such as retail malls, are private.     

Proportional quota weighted voting system hierarchies

We investigate achievable and unachievable hierarchies in weighted voting systems where the quota is a proportion of the total weight. This extends work of Bean et al. (Theory Dec 65:285–302, 2007) where simple majority achievable hierarchies were characterized. In particular we resolve the question of which hierarchies are possible with common quota rules other than simple majority, such as 2/3-majority or 3/4-majority, and offer a conjecture about proportional quota achievable hierarchies in general.