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Stormwater wetlands are a common part of urban and suburban landscapes. These constructed wetlands provide first-order treatment of effluent from roads, parking lots, lawns and other surfaces. They also provide habitat for wetland-associated birds. Thus, there is a concern that birds may be attracted to potentially toxic habitats. This study assesses nesting success and forging behavior of Red-winged Blackbirds (Agelaius phoeniceus) in retention stormwater wetlands based on drainage type. Drainage categories included residential, commercial, and highway sites. Commercial sites had the lowest nesting success and the lowest diversity of invertebrate foods. Mean nest success values for all three types of wetlands, especially for highway drainages, were comparable to published values from natural wetlands. Over two years of study highway ponds collectively served as source populations whereas residential and commercial sites were population sinks in one year and sources in the other. Red-wings using highway sites had the highest foraging efficiency as determined by the frequency and duration of forays. Residential sites had the greatest human disturbance and generally had intermediate-quality habitat and nesting success. We conclude that while stormwater wetlands collect run off and accompanying pollutants, they can still be valuable habitats for nesting birds in urban and suburban areas. We recommend a few management strategies that can increase avian use of these habitats.  相似文献   
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Attempts to evalute the quality of life in historical perspective have been hindered by the absence of data on the perceptions that people held about their well-being as well as by the absence of a broad base of social indicators concerning their physical environment. Given these constraints, in this paper we develop a framework for discussing the well-being of the inhabitants of Aix-en-Provence during the past three centuries. We discuss the quality of life implications of the historical changes in life styles as expressed in the socio-economic structure and in family and work arrangements as well as those based on a limited knowledge of their physical environment as measured by the Physical Quality of Life Index.We presented an earlier version of this paper in Bielefeld, Germany at the XIII World Congress of Sociology, July, 1994. Grand Valley State University provided financial support for research and travel. We thank the staffs of the various French archives who helped us locate historical documents. Bernard Bernos of the University of Provence suggested several historical works that provided us with useful insights about the evolution of human well-being in France. Our longtime colleague and mentor, Doh Shin, located references for us when we were far from an American library and contributed extensive intellectual counsel from which we benefitted enormously.  相似文献   
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SC—statistical calculator   总被引:1,自引:0,他引:1  
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Low back pain (LPB) is a major health problem among military rotary-wing aircrews worldwide. In order to define the etiology and propose remedies to LBP in helicopter aviators a review and critique of the literature was conducted. In-flight sitting posture and vibration generated by the aircraft were identified as high risk factors for LBP. Consequently, researchers recommended ergonomic modifications to the crew stations. The efficacy of these technical interventions has not been proven. As well, these design changes are not financially practical. Following an in depth kinesiological analysis of the physical demands of this type of flying, and preliminary experimentation, an alternative aeromedical approach focusing on the aircrew rather than the craft is presented. The authors propose a set of flight-specific exercises that might effectively deal with this problem. A thorough testing of this approach is envisioned.  相似文献   
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Multiracial families are uniquely affected by racial dynamics in U.S. society. Family therapists must be prepared to meet the needs of this growing population and to support racial equity. This article includes an overview of literature related to being multiracial and offers a framework for working with multiracial identity development in therapy. A critical conversation approach to working with multiracial identity is shared along with case examples. The authors' experiences developing the model via a practitioner inquiry group are highlighted.  相似文献   
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