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Despite the enormous potential of anadromous fish, foragers do not mass extract and store salmonids until very late in the archaeological record of California. Acorns, by contrast, were intensively used quite early in the record. Salmon are traditionally viewed as a low cost, high ranking resource, and acorns as a high cost, low ranking resource. The question thus arises: why were salmon not used and stored en masse much earlier? We offer a solution using a simple foraging model that distinguishes resources on their storage as well as overall cost, making it possible to calculate the risk of resource caching, which appears to have delayed intensive salmon procurement in California.  相似文献   
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This research is an examination of the role of organized interests in international climate change policy formation. Systematic survey results are used to demonstrate that organized interests actually engage in the same activities in both the international and domestic arenas. This research demonstrates that the climate change negotiations can be characterized as both a policy subsystem and an international regime. It is further argued that these two concepts are in fact highly analogous, thereby facilitating new cross-discipline research opportunities. The research is based on a web survey of organized interests accredited by the United Nations Framework Convention on Climate Change (UNFCCC), and on interviews and field research at the 8th Conference of the Parties of the UNFCCC in New Delhi, India.  相似文献   
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Archaeologists strive to document the process of excavation and discovery as completely as possible. Over the past several decades archaeologists have incorporated a growing number of computerized techniques for documenting archaeological finds. Scanning is one such technique. There are a number of technologies that now allow archaeologists to scan structures, excavation surfaces and in situ artifacts to create high-resolution, 3D data sets. We report here on a trial application of one of these, a structured-light scanner, to create 3D representations of excavated surfaces and associated artifacts at two Middle Paleolithic sites in southwest France. In each instance, surfaces of approximately 2.5 m2 were scanned in approximately 1 day. The resulting data sets are very good representations of the originals in terms of colors and spatial details, and as such provided an important piece of archaeological documentation. To use this equipment successfully in the field, however, required solving a number of logistical issues, and the amount of time required to learn to use this equipment was significant. Once these issues are addressed, this technology is appropriate for documenting extraordinary, unique finds where time and costs are offset by the importance of good documentation.  相似文献   
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This article analyses the correspondence of Boniface and his associates, arguing that Boniface deliberately but subtly communicates a Pauline apostolic identity in his letters, expressing his personal and professional successes, struggles, and feelings through a pervasive language of biblical allusions drawn primarily from the Pauline Epistles. The effectiveness of this hermeneutic becomes apparent when we see the complicity of Boniface's fellow correspondents and their ability and willingness to respond to his Pauline allusions in kind. They express their support of Boniface's missionary and reform projects through their participation in these discursive practices; their ability to recognize, interpret and engage with this biblical language supplies the meaning to his words and, in doing so, systematically constitutes Boniface as an apostolic figure.  相似文献   
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This paper contributes to a discussion on networks as political spaces by examining the work of an environmental activist group in Kaliningrad, Russia. Drawing from geographic work on communication and from literature on organizational structure and communication technology provides a useful means of understanding and conceptualizing computer networks from a social science perspective. The case study of grassroots activism illustrates how computer-based communication may support a unique space of political activity. Electronic mail (e-mail) communication can be a channel through which activists may overcome the constraints of location as an information container in order to create spaces of interaction and action appropriate to their political agenda. This case study is an example where organization members use e-mail communication to connect their activities, information sources and collaborative partners at different scales to create a viable space for environmental activism and information distribution within a shifting political context.  相似文献   
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