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71.
In line-transect sampling data are collected continuously along the path travelled. These data are then used to estimate some characteristic of an entire region. We model the characteristic of the region as a linear functional of Z(), a realization of a random field, and our data as the values of Z(x) for x along the path. We study how to estimate the characteristic of interest and how to choose the path to accurately estimate it. 相似文献
72.
A Theory of Access* 总被引:1,自引:0,他引:1
Abstract The term “access” is frequently used by property and natural resource analysts without adequate definition. In this paper we develop a concept of access and examine a broad set of factors that differentiate access from property. We define access as “the ability to derive benefits from things,” broadening from property's classical definition as “the right to benefit from things.” Access, following this definition, is more akin to “a bundle of powers” than to property's notion of a “bundle of rights.” This formulation includes a wider range of social relationships that constrain or enable benefits from resource use than property relations alone. Using this framing, we suggest a method of access analysis for identifying the constellations of means, relations, and processes that enable various actors to derive benefits from resources. Our intent is to enable scholars, planners, and policy makers to empirically “map” dynamic processes and relationships of access. 相似文献
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Nancy Boucot Cummings 《Second opinion (Park Ridge, Ill.)》1993,19(2):112-116
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A growing body of research has begun to describe the variety and pervasiveness of community services offered by religious congregations across the United States. This study investigated the process whereby a congregation forms a new community service entity by tracing patterns in its development from formation through emancipation. Based on a sample of twenty‐three spin‐off organizations engaged in housing services in three cities (Cleveland, Pittsburgh, and St. Louis), this exploratory study found that religious congregations provided very limited forms of incubation for new entities. Although the congregations exhibited considerable involvement in governance, their inability to undertake management of daily spin‐off operations notably contributed to the eventual separation between parent and organizational offspring. 相似文献
80.
Nancy A. Naples 《Rural sociology》1994,59(1):110-135
Abstract Contradictions in agrarian ideology are revealed through an analysis of social dimensions of economic restructuring in rural Iowa. Data are culled from field observations and in-depth interviews with white European American residents. How rural residents cope with and make sense of the changes within their communities are two interrelated dimensions of social restructuring. The research highlights a perception of sharpening social and economic divisions within two small communities. The social and economic changes challenged residents' self-definitions, perspectives on rural community life, and previously taken-for-granted notions of gender, racial-ethnic, and class relations. Analysis of field data demonstrates contradictory ways that discourses on agrarianism and gemeinschaft serve as resources as well as impediments to social support and community development. 相似文献