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41.
42.
Blank NM  Werner-Lin A 《Omega》2011,63(3):271-290
In the era of managed care, evidence-based practice, and short term, solution focused interventions, clinicians in agency based settings generally do not have the luxury of long-term contact with bereaved children. Although a substantial, yet controversial, literature argues that children cannot fully resolve early loss until adulthood, limited attention is given to how children's understandings of early loss shift as their cognitive capacities mature. This article argues the emotional experience of grief shifts: 1) as children grapple with both normative life changes and the tasks of mourning, and 2) as their cognitive and emotional development allow them to understand and question aspects of their deceased parent's life and death in new ways. This article will present an overview of longitudinal and cross-sectional research on the long-term impact of childhood grief. We then suggest the ways bereaved children and adolescents revisit and reintegrate the loss of a parent as their emotional, moral, and cognitive capacities mature and as normative ego-centrism and magical thinking decline. To demonstrate these ideas, we draw on the case of a parentally bereaved boy and his family presenting across agency-based and private-practice work over the course of 14 years. This case suggests the need for coordinated care for children who are moving beyond the initial trauma of parental loss into various stages of grief and reintegration. While the loss of a parent is permanent and unchanging, the process is not: it is part of the child's ongoing experience. (Worden, 1996, p. 16).  相似文献   
43.
Excess exposure to ultraviolet radiation (UV) from the sun, particularly the ultraviolet B (UVB), is cited as a cause or contributing factor for deleterious effects on human health, including skin cancers and cataracts. Rates of skin cancer have increased greatly in recent years, and increased UVB caused by reductions in stratospheric ozone may be responsible for some of the increase in rates, though quantified estimates of the effect of the UVB changes on health have low certainty. UVB exposure also affects the function of the immune system, and the potential resulting effects on infectious diseases and immunizations are a concern. Epidemiological considerations suggest that peoples' routine exposure to UV in urban areas can be significant in adverse health effects, particularly for young children. Projected trends of ozone indicate that agreements to limit ozone-depleting substances are slowing the UVB increase, but high levels will continue and apparently impact health to the middle of the current century. Urban trees greatly reduce ultraviolet irradiance in their shade when they obscure both the sun and sky. Where trees or other structures obscure only the sun, leaving much of the sky in view, UVB irradiance will be greater than suggested by the visible shade. Since air pollutants influence the UVB above the canopy, and the overlying atmosphere is usually more polluted in urban than rural areas, additional above-canopy monitoring of UV in urban areas is needed for comparison to existing rural monitoring sites. Such monitoring would facilitate the development of computer models of urban effects on UV, which are needed for epidemiological investigations, public education, and urban planning.  相似文献   
44.
This paper is a review of research in Chicago that linked analyses of vegetation structure with forest functions and values. During 1991, the regions trees removed an estimated 5575 metric tons of air pollutants, providing air cleansing worth 9.2 million. Each year they sequester an estimated 315 800 metric tons of carbon. Increasing tree cover 10% or planting about three trees per building lot saves annual heating and cooling costs by an estimated 50 to 90 per dwelling unit because of increased shade, lower summertime air temperatures, and reduced neighborhood wind speeds once the trees mature. The net present value of the services trees provide is estimated as 402 per planted tree. The present value of long-term benefits is more than twice the present value of costs.  相似文献   
45.
In the mid to early 1970s feminist writers raised four major criticisms about sociological research on women and expressed concern about the related issue of the discipline's treatment of women sociologists. Critics charged that sociological research underrepresented women as subjects, concentrated on research topics more central to men's than to women's lives, used concepts, paradigms, methods, and theories better portraying men's than women's lives, and used men and male experience as norms against which all social experience was assessed. Examination of published research in ten major sociology journals the 1974–83 period suggests that some concerns articulated in the critiques are reflected in subsequent published work, but others have had little or only limited impact. Findings suggest an association between women's participation as editors, board members, and authors in journals and the quantity and character of published gender articles.  相似文献   
46.
Studies of the relationship between social status and fertility in developing societies have shown diverse results. This study suggests that such findings result in part from problems in the conceptualization of social stratification and social status. In developing societies such as Iran the differentiation of modern and traditional cultural (and occupational) groups within social classes has resulted in the emergence of a dual hierarchy. Measures of social status must therefore reflect these conceptually distinct hierarchies, rather than be limited to linear scales. Figures from a study in a town and three villages in northwest Iran undertaken in 1973 are analyzed. Findings indicate that for women in towns, as social status increases within both traditional and modern occupational hierarchies (husband's occupation) and as measured by income, education and index of modern items, there is a general and almost monotonic decrease in the number of living children, children ever-born, and ideal number of children, with an increase in age at marriage and contraceptive use. The social and cultural homogeneity of the village sample is reflected in the relatively small variations in fertility-related behaviour and attitudes; however, fertility differences between landed and landless villages appear similar to the pattern found in the urban samples. The differences in the fertility behaviour of village and urban women of similar income and educational status indicate that fertility behaviour is related partially to class and partially to status distinctions between urban and rural communities.  相似文献   
47.
Population-level proportions of individuals that fall at different points in the spectrum [of disease severity], from asymptomatic infection to severe disease, are often difficult to observe, but estimating these quantities can provide information about the nature and severity of the disease in a particular population. Logistic and multinomial regression techniques are often applied to infectious disease modeling of large populations and are suited to identifying variables associated with a particular disease or disease state. However, they are less appropriate for estimating infection state prevalence over time because they do not naturally accommodate known disease dynamics like duration of time an individual is infectious, heterogeneity in the risk of acquiring infection, and patterns of seasonality. We propose a Bayesian compartmental model to estimate latent infection state prevalence over time that easily incorporates known disease dynamics. We demonstrate how and why a stochastic compartmental model is a better approach for determining infection state proportions than multinomial regression is by using a novel method for estimating Bayes factors for models with high-dimensional parameter spaces. We provide an example using visceral leishmaniasis in Brazil and present an empirically-adjusted reproductive number for the infection.  相似文献   
48.
Abstract

Critical literacy is an appropriate learning outcome for social studies courses because it has the potential to teach students how to critically evaluate sources of information relevant to historical texts and current news media. The purpose of this qualitative case study is to examine the process through which students learned to apply critical literacy strategies while completing an end-of-unit research project in tenth grade AP world history. This study looks as student and teacher interviews to examine how students use critical literacy approaches and perspectives to analyze texts. As a result of this study it was determined that: (1) students at the elite private school had limited experience with source evaluation and critical literacy prior to this research project, (2) critical literacy served as an effective evaluation tool for reliability and bias for some students, (3) certain students experienced challenges in using critical literacy as an evaluation tool, and (4) students believed that critical literacy would benefit them personally and academically. Results include implications for instructors who wish to teach critical literacy and source evaluation in this information age.  相似文献   
49.
Resolving paradoxes involving surrogate end points   总被引:1,自引:0,他引:1  
Summary.  We define a surrogate end point as a measure or indicator of a biological process that is obtained sooner, at less cost or less invasively than a true end point of health outcome and is used to make conclusions about the effect of an intervention on the true end point. Prentice presented criteria for valid hypothesis testing of a surrogate end point that replaces a true end point. For using the surrogate end point to estimate the predicted effect of intervention on the true end point, Day and Duffy assumed the Prentice criterion and arrived at two paradoxical results: the estimated predicted intervention effect by using a surrogate can give more precise estimates than the usual estimate of the intervention effect by using the true end point and the variance is greatest when the surrogate end point perfectly predicts the true end point. Begg and Leung formulated similar paradoxes and concluded that they indicate a flawed conceptual strategy arising from the Prentice criterion. We resolve the paradoxes as follows. Day and Duffy compared a surrogate-based estimate of the effect of intervention on the true end point with an estimate of the effect of intervention on the true end point that uses the true end point. Their paradox arose because the former estimate assumes the Prentice criterion whereas the latter does not. If both or neither of these estimates assume the Prentice criterion, there is no paradox. The paradoxes of Begg and Leung, although similar to those of Day and Duffy, arise from ignoring the variability of the parameter estimates irrespective of the Prentice criterion and disappear when the variability is included. Our resolution of the paradoxes provides a firm foundation for future meta-analytic extensions of the approach of Day and Duffy.  相似文献   
50.
Objective. What effect does the extent of economic inequality within a country have on the religiosity of the people who live there? As inequality increases, does religion serve primarily as a source of comfort for the deprived and impoverished or as a tool of social control for the rich and powerful? Methods. This article examines these questions with two complementary analyses of inequality and religiosity: a multilevel analysis of countries around the world over two decades and a time‐series analysis of the United States over a half‐century. Results. Economic inequality has a strong positive effect on the religiosity of all members of a society regardless of income. Conclusions. These results support relative power theory, which maintains that greater inequality yields more religiosity by increasing the degree to which wealthy people are attracted to religion and have the power to shape the attitudes and beliefs of those with fewer means.  相似文献   
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