Statistical Design for Sampling and Analysis of Animal Populations for Chemical Contamination

A strategy for sampling of animal tissues and a statistical approach for analyzing data on body burdens of a parent chemical and its metabolites is presented such that the data may be evaluated in relation to the detection limit(s)of the analytical techniques used and the criterion levels established for acceptable tissue concentrations.     

Some determinant optimality aspects of main effect fold-over designs

Saha and Mohanty (1970) presented a main effect fold-over design consisting of 14 treatment combinations of the 24×33 factorial, which had the nice property of being even balanced. Calling this design DSM, this paper establishes the following specific results: (i) DSM is not d-optimal in the subclass Δe of all 14 point even balanced main effect fold-over designs of the 24×33 factorial; (ii) DSM is not d-optimal in the subclass $\text{Δ}{}^1\text{?Δ}{}^{\mathrm{e}}$ of all 14 point even and odd balanced main effect fold-over designs of the 24×33 factorial; (iii) DSM is even optimal in $\text{Δ}{}^1$ and Δe. In addition to these results two 14 point designs in $\text{Δ}{}^1$ are presented which are d-optimal and via a counter example it is shown that these designs are not odd optimal. Finally, several general matrix algebra results are given which should be useful in resolving d-optimality problems of fold-over designs of the kn11×kn22 factorial.     

Aging and Gender:

Social science literature on aging has assumed without empirical basis that women experience greater continuity in their lives than men and that this is beneficial to women in the process of aging. This research explores the issue of continuity in values over the life course and the relationship of values to a sense of meaning attributed to one's life over the life course. Thirty life history interviews of men and women over the age of sixty-nine were conducted. Differences in values were found between men and women. Men experienced less continuity of values, less continuity in sources of meaning in Life, and more dissatisfaction in the process of life review, but for most men the lack of continuity was not a source of dissatisfaction in old age.     

Body image,self-esteem,and behavioral risk for chronic disease among college students: Additional evidence for integrated prevention

Abstract

Objective: To examine associations between two body image constructs (body appreciation and body satisfaction) and five health behaviors (diet, physical activity, weight management, tobacco exposure, and alcohol intake) associated with risk for chronic disease, controlling for self-esteem. Participants: Three hundred and forty-four college students enrolled at a large, public university in the southeastern US. Methods: Students completed an online survey composed of measures of body appreciation, body satisfaction, self-esteem, and frequency of engagement in preventive health behaviors. Hierarchical linear regression models were used to assess relationships between constructs. Results: Body appreciation, but not body satisfaction or self-esteem, significantly and positively predicted engagement in diet-, physical activity-, and weight-related health behaviors. No associations were found for substance use outcomes. Conclusions: Results illuminate health risks among college students and provide additional evidence to support the development of holistic preventive interventions that simultaneously address aspects of mental and physical health among college students.     

李源澄先生经史成就述论

李源澄是我国近现代著名学者。他早年在四川、江苏、河南等地求学,后在江苏、北京、四川、云南、重庆等省市从事教学、科研活动,与古今、新旧、老辈与同辈学者均有广泛的师承及交游关系,因而,他在经学、史学等领域学术研究上成果颇丰,为后人留下了比较丰富的精神财富,在中国近现代学术史上占有一席之地。     

Data envelopment analysis 1978–2010: A citation-based literature survey

This study surveys the data envelopment analysis (DEA) literature by applying a citation-based approach. The main goals are to find a set of papers playing the central role in DEA development and to discover the latest active DEA subareas. A directional network is constructed based on citation relationships among academic papers. After assigning an importance index to each link in the citation network, main DEA development paths emerge. We examine various types of main paths, including local main path, global main path, and multiple main paths. The analysis result suggests, as expected, that Charnes et al. (1978) [Charnes A, Cooper WW, Rhodes E. Measuring the efficiency of decision making units. European Journal of Operational Research 1978; 2(6): 429–444] is the most influential DEA paper. The five most active DEA subareas in recent years are identified; among them the “two-stage contextual factor evaluation framework” is relatively more active. Aside from the main path analysis, we summarize basic statistics on DEA journals and researchers. A growth curve analysis hints that the DEA literature’s size will eventually grow to at least double the size of the existing literature.     

Eye of the Beholder? Sociocultural Factors in the Body Image and Sexual Well-Being of Heterosexual Women

ABSTRACT. Participants (124 heterosexual women) completed measures of thin-ideal internalization, discrepancy between perceptions of actual and ideal figure (DISC_SELF), perceptions of the discrepancy between estimates of partner's view of actual and ideal female figure (DISC_PART), body image, and sexual well-being. We found support for the proposed perception-of-partner pathway in that greater DISC_PART was associated with poorer body image, which in turn was associated with poorer sexual well-being. However, we found little support for a link between thin-ideal internalization or DISC_SELF and sexual well-being. The results suggest that heterosexual women's beliefs about how their partners view them are important to their sexual well-being.     

The Barbie Mystique: Satisfaction with Breast Size and Shape across the Lifespan

ABSTRACT

The prevalence of breast augmentation and breast lift surgery suggests that many women are dissatisfied with their breasts. This study analyzed women's and men's views about breast size and shape among 52,227 heterosexual adults, ages 18–65, who responded to an online survey. Although most women (70%) were dissatisfied with the size or shape of their breasts, most men (56%) were satisfied with their partner's breasts. Younger and thinner women worried that their breasts were too small; older and heavier women were more concerned with breast droopiness. Women who were dissatisfied with their breasts were more likely to report lower body satisfaction and to express concern about wearing a bathing suit in public. Further, dissatisfied women were also less willing to undress in front of their partner and were more likely to conceal their breasts from their partner during sex. These findings suggest that dissatisfaction with breasts is widespread among adult women.     

儿童的自由:以身体为基的自由

以身体为基的自由是一种实践的、动态的自由,此自由体现在身体不断地对界限进行超越的过程中,体现在不确定性和流动性中。儿童的自由只有在实践的、不确定的身体运动中才能生长起来。儿童的权力,从动作出发而产生;儿童的智慧,在体验中生长;儿童的自由,在身体解放中得以实现。     

A Time‐Dependent Risk Assessment for Broken Compact Fluorescent Lamps

Environmental Protection Agency (EPA) ambient air quality guidelines are meant to limit long‐term exposures of toxins to safe levels. Unfortunately, there is little guidance for what constitutes a safe level from a one‐time (or very infrequent) short exposure(s). In the case of mercury, a review of the derivation of the EPA ambient air quality standard shows that it implicitly assumes a tissue burden model. The time dependence of the tissue burden is commonly described in terms of a half‐life, a modeling assumption that presumes that the decline in the tissue burden after a single exposure can be approximately described as an exponential decay. In this article, we use a simple exponential tissue burden model to derive a time‐dependent no observable adverse effect level (NOAEL) for mercury concentrations in air. The model predicts that tissue body burden will asymptotically approach the EPA air quality level for long exposure times, and reach workplace standard levels for exposures of a few hours. The model was used along with data on mercury levels from experimental work done by the Maine Department of Environmental Protection to evaluate the risks from a broken compact fluorescent lamp in a residential setting. Mercury levels approached the NOAEL only when the debris was left in an almost sealed room. Normal common‐sense cleaning measures: removal of debris to an outside area, and ventilation of the room for several minutes, reduced exposures to less than 1% of the NOAEL.