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991.
Douglas Cousminer 《Journal of American college health : J of ACH》2013,61(1):47-48
Abstract As an undergraduate student with cerebral palsy, I found it difficult to achieve my goal of starting a regular exercise program at my school, the University of Central Florida. However, when I started a program called Assisted Workouts in spring 2003, the struggle proved to be well worth it. The program is not only beneficial to me, but it has also opened the door for other students who, because of disability or injury, need assistance in using gym equipment. 相似文献
992.
993.
Douglas S. Noonan 《Social science quarterly》2008,89(5):1153-1174
Objective. This article gleans important lessons for environmental justice (EJ) policy from the empirical literature and demonstrates them using EJ analyses of Superfund sites. It constructively critiques the EJ literature and suggests some future directions for designing policy and framing the discourse. Methods. The research methods of many quantitative EJ studies are reviewed. To demonstrate sensitivity to researchers' choices, logit models are estimated to explain the nationwide distribution of Superfund sites (and deletions from the NPL) using various spatial scales, control variables, and definitions of proximity. Results. Most empirical EJ studies examine cross‐sectional distributions for aggregated demographic measures, dwelling on the implied counterfactual or causal mechanism briefly, if ever. The EJ analysis for Superfund sites exhibits much sensitivity to modeling choices and to whether environmental conditions or policy impacts are modeled. Conclusions. The findings highlight the limitations of conventional EJ research designs. Several implications for the design of EJ policy are drawn, emphasizing the importance of clarity about counterfactuals and which sorts of impacts are relevant. Principles for a revised EJ policy framework are proposed. 相似文献
994.
995.
Frequently in clinical and epidemiologic studies, the event of interest is recurrent (i.e., can occur more than once per subject). When the events are not of the same type, an analysis which accounts for the fact that events fall into different categories will often be more informative. Often, however, although event times may always be known, information through which events are categorized may potentially be missing. Complete‐case methods (whose application may require, for example, that events be censored when their category cannot be determined) are valid only when event categories are missing completely at random. This assumption is rather restrictive. The authors propose two multiple imputation methods for analyzing multiple‐category recurrent event data under the proportional means/rates model. The use of a proper or improper imputation technique distinguishes the two approaches. Both methods lead to consistent estimation of regression parameters even when the missingness of event categories depends on covariates. The authors derive the asymptotic properties of the estimators and examine their behaviour in finite samples through simulation. They illustrate their approach using data from an international study on dialysis. 相似文献
996.
Kathryn Amey Degnan Heather A. Henderson Nathan A. Fox Kenneth H. Rubin 《Social Development》2008,17(3):471-487
Children with behavioral inhibition, a temperamental style characterized by infant distress to novelty and childhood social reticence, exhibit both continuity and discontinuity of this behavioral trait over the course of development. However, few researchers have identified factors that might be responsible for these different patterns. In the current study, childcare history, maternal personality, and maternal behavior were examined as moderators of the relations between infant temperament, preschool social reticence, and childhood social wariness. Seventy-seven children participated in this longitudinal study that began in infancy and continued into middle childhood. Maternal negative personality moderated the relation between infant temperament and childhood social wariness. In addition, maternal behavior moderated the relation between preschool social reticence and childhood social wariness. The findings suggest that a complex interplay of within-child and maternal factors affect the development of internalizing behavior in the early school years. 相似文献
997.
This study presents statistical techniques to obtain local approximate query answers for aggregate multivariate materialized views thus eliminating the need for repetitive scanning of the source data. In widely distributed management information systems, detailed data do not necessarily reside in the same physical location as the decision-maker; thus, requiring scanning of the source data as needed by the query demand. Decision-making, business intelligence and data analysis could involve multiple data sources, data diversity, aggregates and large amounts of data. Management often confronts delays in information acquisition from remote sites. Management decisions usually involve analyses that require the most precise summary data available. These summaries are readily available from data warehouses and can be used to estimate or approximate data in exchange for a quicker response. An approach to supporting aggregate materialized view management is proposed that reconstructs data sets locally using posterior parameter estimates based on sufficient statistics in a log-linear model with a multinomial likelihood. 相似文献
998.
Heather Helms‐Erikson 《Journal of marriage and the family》2001,63(4):1099-1110
Using a sample of 180 dual‐earner, nondivorced couples, this study explored how the timing of parenthood and the division of housework are related to husbands' and wives' marital quality during the childrearing years. Hypothesized to be “at risk” for negative marital evaluations were early first‐birth couples who divided tasks in a less‐traditional manner and delayed first‐birth couples who divided tasks in a traditional manner. Analyses revealed that husbands and wives in the “risk” groups evaluated their marriages more negatively, suggesting that congruence between behaviors, background, and attitudes is important for marital quality. In addition, early first‐birth couples evaluated their marriages more poorly than did the “on time” or “delayed” couples. Wives' gender‐typed attitudes emerged as a significant covariate in the analyses but did not account for the effects of the timing of parenthood and the timing of parenthood × the division of housework interactions. 相似文献
999.
Heather Hpfl 《Gender, Work and Organization》2000,7(2):98-105
This paper examines the contribution of the writing of Julia Kristeva (1941– ) to post‐structuralist ideas about gender in organizations. In particular, it deals with the relationship between her writing and the disciplining of text and, by a parallel movement, with her writings about the body and the regulation of the body. However, it must be said that her writings are ‘extremely difficult and complex, and certainly intimidating and inaccessible to the non‐specialist’ (Lechte 1990, p. 2) but, despite this, Kristeva has come to be considered one of the foremost contemporary French thinkers and her writings have exerted a significant influence on both feminism and postmodernist ideas. Ironically, Kristeva is neither French by birth nor a feminist in the sense that the term is generally understood. Indeed, she has been highly critical of those feminists whom she regards as seeking ‘phallic power’ (Kristeva 1980, p. 208). 相似文献
1000.