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481.
An assessment of two groups of approaches for estimating urban population with remote-sensing information is presented in this article. These approaches, zonal and pixel-based models, are applied to Landsat Enhanced Thematic Mapper images of a portion of Columbus, Ohio , to generate population estimates. The zonal approach uses impervious surface fraction, spectral radiance, and land-use/land-cover classification to derive population estimates. The pixel-based approach uses impervious surface fraction and spectral radiance to estimate the population of residential areas. To assess robustness, these models were applied to Dayton, Ohio . A comparative study indicates that the models generated promising results in estimating regional population counts. However, zonal regression with spectral radiance produced large errors (76%) for census block groups, whereas other models gave significantly better estimation accuracy. Comparing the performance of the indicators, impervious surface fraction is competitive, and slightly but consistently better than land-use classification. In comparison with traditional zonal approaches, pixel-based models give somewhat better estimation accuracy. 相似文献
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Alan Maddox 《Intellectual History Review》2017,27(3):333-349
ABSTRACTRecent thinking about Intellectual History has moved beyond studying only verbal texts, to encompass other kinds of visual and aural texts that can be vehicles for generative thought. Where might music fit into this expanded conception? If ideas are defined purely as concepts that can be expressed in words, music can be no more than an “epiphenomenon”, a consequence or representation of ideas that lie behind it, but not capable of embodying those ideas in itself. Yet to many musicians, it seems obvious that music can function as a way in which ideas are developed and worked out. What kinds of knowledge might be embodied in music, then, and how do its meanings change over time? In this paper, I examine some of these issues through consideration of one of the key texts of Western art music, J.S. Bach’s St. Matthew Passion, exploring how it was conceived in a liturgical context in Bach’s time, how its meaning changed when transposed to the very different milieus of concert performance in nineteenth-century Berlin and colonial Sydney, and as it has been re-imagined in a variety of recent staged and recorded versions. 相似文献
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Alan Fenna 《Australian journal of political science》2015,50(4):611-626
This paper surveys the contribution that articles on public policy have made to this journal in its first half-century. To help organise those contributions, the paper makes a rough distinction between works of a primarily explanatory nature and those that can be thought of as having a substantive focus on analysing particular policy areas or issues. It observes the paucity of policy studies in the 1960s and 1970; the rapid rise in the 1980s; and a plateauing and even perhaps decline after that. It notes the desultory interest in theoretical questions and welcome attempts to employ the comparative method. 相似文献
486.
Landon P. Karr Alice E. G. Short L. Adrien Hannus Alan K. Outram 《Environmental Archaeology》2015,20(1):1-12
Recent excavations at the Mitchell Prehistoric Indian Village, an Initial Middle Missouri site in Mitchell, South Dakota have revealed a large, clay-lined feature filled with fractured and fragmented bison bones. Fracture and fragmentation analysis, along with taphonomic evidence, suggests that the bones preserved within the feature represent evidence of prehistoric bone marrow and bone grease exploitation. Further, the character of the feature suggests that it served as a bone grease processing station. Bone fat exploitation is an activity that is frequently cited as a causal explanation for the nature of many fractured and fragmented bone assemblages in prehistory, and zooarchaeological assemblages have frequently been studied as evidence of bone fat exploitation. The Mitchell example provides some of the first direct, in-situ archaeological evidence of a bone grease processing feature, and this interpretation is sustained by substantial analytical evidence suggesting bone fat exploitation. This new evidence provides a clearer concept of the nature of bone fat exploitation in prehistory as well as an indication of the scale and degree to which bone grease exploitation occurred at the Mitchell site. Finally, this research demonstrates the importance of careful zooarchaeological and taphonomic analysis for the interpretation of both artifactual remains as well as archaeological features. 相似文献
487.
Our understanding of the marriage strategies and family formation of enslaved people remains clouded by disagreement among contemporary scholars. A perusal of the historical literature suggests that two issues lay at the root of this disagreement: First, scholars disagree over the extent to which slave family life was shaped by the external factors of slavery, or rather slave agency; and second, scholars appear reluctant to abandon their singular views of the slave family. This article addresses both of these gaps by formulating a middle ground in the slave agency debate and by redefining the slave family in plural form. An analysis of the boundaries and opportunities for family formation in northern Virginia and lowcountry South Carolina, this study shows that while the establishment of co-residential two-parent households was the ideal for slaves, not all were able to realize that ideal, and those that could not adapted their marriage strategies and family lives accordingly. 相似文献
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Alan H. Simmons 《International Journal of Osteoarchaeology》2008,18(1):106-108
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