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The waters of Puerto Rico harbour the remains of thousands of years of human occupation. The island played a key role in the first decades of European exploration of the New World, and its coasts and estuaries have preserved an extensive record of the island's maritime history, before and after the arrival of the Europeans. The objective of this project is to study Puerto Rico's seafaring history through the investigation of its submerged cultural heritage, with a particular focus on the history of European shipbuilding. In 2008 the authors started with survey on the north coast.
© 2009 The Authors  相似文献   
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The clustering of suburban office space in “office parks,” as well as the larger activity nodes of polycentric cities, has been widespread in recent years. The reasons for this clustering are not well understood, as the footloose nature of firms suggests a variety of patterns might evolve. This paper explores three traditional explanations: economies of scale in the supply of space, demands for access, and face-to-face contact needs of firms. Finding that those explanations do not completely explain the clustering pattern, an alternative explanation is considered, the demand for image or prestige.  相似文献   
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One Gravettian feminine representation – the schematic Venus of P?edmostí – is so different from all the others that it has always been regarded as unique. The engraving, which was closely examined for the purpose of comparison in this study, represents a woman composed of geometric shapes, including a triangular head with interior lattice-work, concentric ellipses for the breasts, belly and pelvis, a double ladder for the remaining arm, hatch marks, and a thigh made up of parallel vertical lines. This article presents the discovery and discusses the authenticity of a second, feminine anthropomorph engraved on a bone shaft fragment, which is labelled as coming from the same site and is highly similar to the one described at the end of the nineteenth century. The modern history of P?edmostí reveals that the site was used as a quarry for the extraction of loess and limestone, and that tons of mammoth bones were extracted to produce spodium. Remarkable objects that were found both during early archaeological excavations and the site’s commercial exploitation went towards private collections. The history of the piece under study traces it back through a succession of owners to the collection of René de Poilloüe de Saint-Périer (b.1877–d.1950) and Raymonde-Suzanne de Saint-Périer (b.1890–d.1978). The engraving is on the periosteal surface of a limb bone from a very large mammal, probably a proboscidian. Microscopic analysis of the bone surface and engravings identify the chronology of the grooves and their relations to the stages of the bone’s alteration and fracturing, starting with: 1) heavy weathering of the bone surface that produced longitudinal cracks, which probably led to its breakage, 2) engraving of the feminine representation, 3) intense mechanical and chemical attacks that smoothed all of the bone’s surfaces and wore down the engravings, 4) covering with a consolidation agent, and, most recently, 5) some abrasion, which resulted in the creation of a few straight lines. Since no evidence is found to suggest that the highly worn appearance of the engravings composing the feminine representation resulted from modifications that were meant to artificially age the periosteal surface of the bone, we conclude that the engraving can be plausibly attributed to the Gravettian and that further analyses are warranted.  相似文献   
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SUMMARY: Transitions in the archaeological and historical record are difficult to discuss and frequently avoided. The authors briefly outline here how this topic has been studied, particularly in Post-Medieval Archaeology, reviewing differences of approach between European-based archaeologists, who stress continuities with medieval times, and archaeologists in the USA and elsewhere, who commence their studies with the arrival of Europeans. This outline is then used to explore how this earliest formative era of the post-medieval period can be studied via modern digital techniques, using a case study drawing on the study of buildings archaeology to further understanding of the transition. This 50th-anniversary contribution therefore intentionally bridges the old and the new.  相似文献   
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