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排序方式: 共有117条查询结果,搜索用时 15 毫秒
1.
Ranked set sampling is a sampling approach that leads to improved statistical inference in situations where the units to be sampled can be ranked relative to each other prior to formal measurement. This ranking may be done either by subjective judgment or according to an auxiliary variable, and it need not be completely accurate. In fact, results in the literature have shown that no matter how poor the quality of the ranking, procedures based on ranked set sampling tend to be at least as efficient as procedures based on simple random sampling. However, efforts to quantify the gains in efficiency for ranked set sampling procedures have been hampered by a shortage of available models for imperfect rankings. In this paper, we introduce a new class of models for imperfect rankings, and we provide a rigorous proof that essentially any reasonable model for imperfect rankings is a limit of models in this class. We then describe a specific, easily applied method for selecting an appropriate imperfect rankings model from the class. 相似文献
2.
Jesse Russell 《Journal of Socio》2012,41(6):843-848
The Icelandic banking crisis provides a useful example of how the global economic downturn transformed into a domestic crisis and then transformed again into an international conflict. Rather than a strict economic analysis, discussion around the economic causes and potential cures surrounding the Icelandic banking crisis have been framed in terms of ethics. The analysis shows that ethical paradigms based on consequences, in line with Kant's hypothetical imperative, do not align well with categorical imperatives based on duty when considering international political conflicts. It is unclear that any accounting would have the potential to achieve reconciliation. 相似文献
3.
This study examines the interactions between homeless pet owners and the domiciled public with a focus on how the activities of pet ownership help construct positive personal identities. Homeless people are often criticized for having pets. They counter these attacks using open and contained responses to stigmatization. More often, they redefine pet ownership to incorporate how they provide for their animals, challenging definitions that require a physical home. Homeless pet owners thus create a positive moral identity by emphasizing that they feed their animals first and give them freedom that the pets of the domiciled lack. Through what we call “enabled resistance,” donations of pet food from the supportive public provide the resources to minimize the impact of stigmatization. 相似文献
4.
This study examined racial–ethnic minority and white identified participants’ perceptions of racial microaggressions in four video scenarios involving a white professor and a black student. Participants (N = 261) were randomly assigned to observe a one of the four video conditions. The video involved an interaction with no microaggression, a very ambiguous microaggression, an ambiguous microaggression, or an overt microaggression. Participants rated their observations of (a) negative emotions toward the committer (white professor) and receiver (black student) of the microaggression, (b) positive emotions toward the committer and receiver of the microaggression, (c) perceptions on the degree of biasedness of committer, and (d) degree of positive perceptions of the committer. Analysis compared ratings of two groups, including racial–ethnic minority and white observers. We found a significant difference between the overt condition and other three conditions on negative emotions, positive emotions, and attributions of the professor (i.e., cultural biasedness and positive perceptions). However, there were no differences between the no microaggression, very ambiguous, and ambiguous conditions. No significant differences between racial–ethnic minority and white participants’ ratings were detected. Implications for training, practice, and future research are offered in our discussion. 相似文献
5.
Katherine Cuff Sunghoon Hong Jesse A. Schwartz Quan Wen John A. Weymark 《Social Choice and Welfare》2012,39(2-3):567-597
A necessary and sufficient condition for dominant strategy implementability when preferences are quasilinear is that, for every individual i and every choice of the types of the other individuals, all k-cycles in i’s allocation graph have nonnegative length for every integer k ≥ 2. Saks and Yu (Proceedings of the 6th ACM conference on electronic commerce (EC’05), pp 286–293, 2005) have shown that when the number of outcomes is finite and i’s valuation type space is convex, nonnegativity of the length of all 2-cycles is sufficient for the nonnegativity of the length of all k-cycles. In this article, it is shown that if each individual’s valuation type space is a full-dimensional convex product space and a mild domain regularity condition is satisfied, then (i) the nonnegativity of all 2-cycles implies that all k-cycles have zero length and (ii) all 2-cycles having zero length is necessary and sufficient for dominant strategy implementability. 相似文献
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This paper considers how shifts within the social sciences towards conceptualising spatiality in relational terms have unfolded in rural studies in particular ways over the past decade or so. A period in which networks, connections, flows and mobility have all established themselves as compelling conceptual frames for research, the rural has increasingly been recast in relational terms as a multi-authored and multi-faceted space, constituted through local-global interconnections and their place specific, sometimes contested, manifestations. In this way, the multiple meanings of the rural continues to be a focus of critical concern, as are the implications ‘of’ and ‘in’ rural spaces for some of the major issues currently being faced by governments and citizens around the world; including climate change and food security. Apprehending the complexity of the rural in these terms, we argue, requires not only thinking space relationally, but at the same time being epistemologically relational or theoretically pluralist. That is, recognising the co-constituent production of rural space through material and discursive phenomenon, processes and practices, and thus the value of existing theoretical resources (social constructionism, political and economic materialism) in relation with the critical and rigorous appraisal of ‘new’ concepts and ideas to better comprehend rural space in its multidimensional complexity and particularity. To this end, we identify Cindi Katz's notion of ‘countertopography’ as a promising conceptual and methodological addition to the rural scholar's toolkit insofar as it attends to a politics of location and differentation in relation to global processes. We conclude our discussion by sketching out possible objects of countertopographical analysis for understanding ongoing processes of change in rural space(s). 相似文献
9.
Jesse J. Helton Jill C. Schreiber Barbara H. Fiese 《Child and Adolescent Social Work Journal》2017,34(2):159-169
Among their many responsibilities, foster parents are tasked with providing healthy food and proper nutrition to children with a variety of physical, psychological, and emotional needs. Using the lens of symbolic interactionism, this exploratory mixed methods study examined how foster parents attend to the nutritional needs of abused and neglected children. Methods used included both quantitative surveys and qualitative follow-up interviews. Surveys were completed by 23 foster parents in a large, Midwest metropolitan area. Parents reported they provided their children balanced meals, although one-third of households reported instances of food insecurity. During qualitative interviews, foster parents (N = 9) described how children arrived at their home with a variety of unhealthy eating habits, some severe in nature. Parents discussed strategies used to modify and improve eating patterns, including offering healthy food choices, having children plan meals, and gathering as a family for daily dinners. In general, parents understood the link between unhealthy eating and past childhood trauma, but also reported being unprepared for more serious eating problems like hoarding. Findings indicate that foster parents need food assistance to increase food security as well as training in assessing and responding a variety of unhealthy child eating behaviors. 相似文献
10.
Researchers have proposed that hospitals with excessive statistically unexplained mortality rates are more likely to have quality-of-care problems. The U.S. Health Care Financing Administration currently uses this statistical “outlier” approach to screen for poor quality in hospitals. Little is known, however, about the validity of this technique, since direct measures of quality are difficult to obtain. We use Monte Carlo methods to evaluate the performance of the outlier technique as parameters of the true mortality process are varied. Results indicate that the screening ability of the technique may be very sensitive to how widespread quality-related mortality is among hospitals but insensitive to other factors generally thought to be important. 相似文献