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51.
Quay  Ray 《Urban Ecosystems》2004,7(3):283-294
A key factor in bridging the gap between ecological research and public land use policy is translating information from the language of research into the language of public policy making. Creating effective translations of research is often beyond the skills of urban planners and environmental researchers individually, and thus collaboration between the two is needed. Examples of such translation and partnerships can be found in the projects of an interdisciplinary group coined the North Sonoran Collaborative. This group consists of Phoenix, AZ, USA city staff, Arizona State University faculty, graduate students, and staff, and people from other local private companies and government agencies. The group, through its collaboration, has sponsored a series of environmental research efforts and translated those into successful land use planning activities and policies. The focus of the collaboration is the northern, largely undeveloped portion of the city of Phoenix, Arizona. This group has pursued three principles: desert ecosystems should be protected, a diversity of development should be pursued, and a sense of community should be created in new developments. This paper discusses this unique approach to planning and how it has proven effective in responding to the local communities needs quickly.  相似文献   
52.
Les caricatures éditoriales forment un métalangage pour parler de l'ordre social. Elles créent des mondes imaginaires qui permettent une nouvelle perspective sur le monde actuel en renversant certains de ses traits. Les dessins de Len Norris sur le bilinguisme montrent un monde carnavalesque. Dans les légendes ses personnages offrent des commentaires sur notre monde et captent le parcoureur, qui doit avouer que ces bouffons ont remarqué ce qui nous avait échappé. Les optiques sémiologiques de Greimas et d'Angenot permettent d'éclairer et de situer le modèle linguistique de Norris, et son avertissement qu'une nouvelle lingua franca fédérate est en train de remplacer symboliquement et le français et l'anglais. Editorial cartoons are a metalanguage for discourse about the social order. They create imaginary worlds which allow a fresh perspective on the present world by inverting certain of its features. Len Norris' cartoons on bilingualism portray a zany imaginary world, whose characters comment in the captions on our world and trap the skimmer into admitting that these fools have noticed something which we have missed. Greimas' and Angenot's semiotic approaches serve to elicit and situate Norris' elaborate model of language skills, and his message about the symbolic replacement of both French and English by federal bilingualese.  相似文献   
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Logistic regression is estimated by maximizing the log-likelihood objective function formulated under the assumption of maximizing the overall accuracy. That does not apply to the imbalanced data. The resulting models tend to be biased towards the majority class (i.e. non-event), which can bring great loss in practice. One strategy for mitigating such bias is to penalize the misclassification costs of observations differently in the log-likelihood function. Existing solutions require either hard hyperparameter estimating or high computational complexity. We propose a novel penalized log-likelihood function by including penalty weights as decision variables for observations in the minority class (i.e. event) and learning them from data along with model coefficients. In the experiments, the proposed logistic regression model is compared with the existing ones on the statistics of area under receiver operating characteristics (ROC) curve from 10 public datasets and 16 simulated datasets, as well as the training time. A detailed analysis is conducted on an imbalanced credit dataset to examine the estimated probability distributions, additional performance measurements (i.e. type I error and type II error) and model coefficients. The results demonstrate that both the discrimination ability and computation efficiency of logistic regression models are improved using the proposed log-likelihood function as the learning objective.  相似文献   
55.
Trauma affecting youth and families takes a variety of forms, from random one-time events such as accidents and natural disasters to chronic and highly personal trauma from child abuse or intimate partner violence. Though trauma has received increasing attention in theory and intervention research over the last several decades, the prevailing theories and treatments have limitations due to a linear perspective focused on the trauma problems of the individual. This is particularly concerning given the high dropout rates for trauma-focused treatments and the complexities of intergenerational trauma that cannot be adequately conceptualised at the level of the individual. To inform and improve family-based treatment of youth and family trauma, this paper proposes a theoretical framework informed by social constructivism and systems theory. Social constructivism upholds that reality is constructed through communication as an adaptive process for survival, with multiple potential realities possible. Systems theory promotes a non-linear view of causality within a system, such that the structure and properties of a system determine outcomes more than the inputs that go into the system. Together, the principles of these meta-theories contradict the orthodox focus on traumatic events causing trauma symptoms, and instead imply that family-based treatment should focus on helping families shift assumptions and dynamics that sustain the problem in the present. The joint application of a social constructivism–systems theory framework for trauma introduces several new principles to inform family-based treatment: (a) post-trauma realities; (b) mutual survival; (c) power–justice balance; and (d) adaptive reorganisation. The implications of these principles for youth and family trauma treatment will be discussed. Future intervention development and research should consider these principles in the ongoing effort to improve family therapy for youth and family trauma.  相似文献   
56.
Environmental policymakers and regulators are often in the position of having to prioritize their actions across a diverse range of environmental pressures to secure environmental protection and improvements. Information on environmental issues to inform this type of strategic analysis can be disparate; it may be too voluminous or even absent. Data on a range of issues are rarely presented in a common format that allows easy analysis and comparison. Nevertheless, judgments are required on the significance of various environmental pressures and on the inherent uncertainties to inform strategic assessments such as “state of the environment” reports. How can decisionmakers go about this type of strategic and comparative risk analysis? In an attempt to provide practical tools for the analysis of environmental risks at a strategic level, the Environment Agency of England and Wales has conducted a program of developmental research on strategic risk assessment since 1996. The tools developed under this program use the concept of “environmental harm” as a common metric, viewed from technical, social, and economic perspectives, to analyze impacts from a range of environmental pressures. Critical to an informed debate on the relative importance of these perspectives is an understanding and analysis of the various characteristics of harm (spatial and temporal extent, reversibility, latency, etc.) and of the social response to actual or potential environmental harm from a range of hazards. Recent developments in our approach, described herein, allow a presentation of the analysis in a structured fashion so as to better inform risk‐management decisions.  相似文献   
57.
In this study the authors used data from a survey of Canadian nonprofit organizations to empirically test hypotheses derived from models of nonprofit board “life cycles.” The authors suggest that while formal structural elements of board behavior change in the manner suggested by life-cycle models, the more enacted or behavioral aspects of nonprofit boards do not. The data further suggest caution in the use of life-cycle or age-dependent models to either explain or guide nonprofit board behavior.  相似文献   
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Recent attempts to announce the death of the family as a useful analytical category for sociologists are rebutted as being premature. The tendency to view household relations as family relations or, indeed, couple or gender relations as family relations seems to have arisen in the early 1970s. Earlier attempts to construct an empirically grounded analysis of family relationships have been curiously neglected. An account of one family on the Isle of Sheppey in Kent provides some illustrative ethnography on both the positive uses of family members-particularly siblings - and on the way the social boundaries of this family are constructed by its members. It is argued that the family is best understood as a system of relationships that change over time. There is a curious lack of systematic ethnography of contemporary family relationships so that what is taught to students as the sociology of the family may be widely at variance with their own personal experience. This may be partly a result of relying too much on random surveys of households at the expense of detailed explorations of existing patterns of social relationships and social meanings. Developing theoretical arguments on the basis of inadequate or inappropriate ethnography is evidently a dangerous and misleading exercise.  相似文献   
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