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991.
By focusing on a transfer of a museological model from the Musée d'Ethnographie du Trocadéro to colonial Indochina, the paper examines the failure to create an ethnographic museum. The paper analyses, on the one hand, the collecting practices in the field and the circulation of knowledge, people, and objects from metropole to colony and vice versa. On the other hand, it seeks to highlight why Rivet and the École Française d'Extrême-Orient focused their research programme on the Montagnards from 1932 onwards at a time when French administration attempted to control the Highlands due to its strategic importance in terms of controlling Indochina. The concern with establishing ethnographic collections in Indochina extending from 1920s to 1938 attests the ways in which museums could be evolved in the governance of colonial populations. However, this concern underestimated the very fact that ethnographic museums differed for metropolitan populations and for colonizers.  相似文献   
992.
There is increasing evidence for complexity in mortuary practices in Britain during the Roman period. One class of burials demonstrates an association between inhumation in stone sarcophagi or lead‐lined coffins, ‘plaster’ coatings, textile shrouds and natural resins. It has been suggested that this ‘package’ represents a deliberate attempt at body preservation. Fragments with a resinous appearance found in one such burial from Arrington, Cambridgeshire, UK were analysed using gas chromatography–mass spectrometry. The triterpenic compounds identified are biomarkers for the genus Pistacia and provide the first chemical evidence for an exotic resin in a mortuary context in Roman Britain.  相似文献   
993.
    
Lead isotopes, thin‐ and sherd‐section analyses are coupled on pottery‐vessel fragments excavated from the Late Bronze Age site of Hala Sultan Tekke (south‐east Cyprus) and representing fabrics used for the production of storage and trade containers. The fabrics of the sherds are first described according to general macroscopic observations. Based on the different fabrics identified, a petrographic analysis is carried out on thin sections and compared to lead isotope results on the same samples. This study shows that a specific fabric corresponds to a specific lead isotopic composition and proposes different sources for the various groups of associated sherds/fabrics. It also demonstrates the compatibility and complementarity of petrography and lead isotopes within pottery provenance study.  相似文献   
994.
    
The assessment of the firing temperature of a prehistoric pottery sample collected from ancient Mesopotamia, Turkey was studied using luminescence techniques. The methods for this estimation involved the observation of the thermal and pre‐dose sensitization with various re‐firing temperatures for both TL and the OSL signals. In the former case, the 110°C TL peak and the rest of the glow curve were used as proxies in this study. In the framework of a first attempt to investigate the impact of grain‐size dependence on the sensitization of the luminescence signals, the aforementioned study was performed with four different pottery grain‐size fractions: (i) less than 60 μm, (ii) 60–90 μm, (iii) 90–180 μm and (iv) 180–250 μm. The results clearly demonstrated the firing temperature mark of ~500°C in for the grain size of 90–180 μm, while—as in the case of the lower grain‐size fraction—a third proxy, the ratio of the pre‐dosed to the thermal sensitization, was seen to indicate the firing temperature. The remaining two grain‐size fractions failed to provide any meaningful results with regard to the firing temperature estimation. The dependence of the TL characteristics on the grain size was explained in the framework of the mixed mineralogy.  相似文献   
995.
996.
    
This paper studies an attempt to replicate the Earth’s biosphere in the second half of the twentieth century with the aim of preserving and refashioning the environment as a self‐reproducing ecological system. Ecosystems dynamics framed the planet Earth as a closed system and directed scientific attention to questions of global environmental management. The image of the Earth as a spacecraft and operable in a similar way supported ideas of placing the environment in a laboratory setting. Using the case of Biosphere 2, launched in the Arizona desert in 1983, this paper studies the images of nature and environment contained in this quest to create an ecosystem and human habitat as good as, or superior to nature on Earth (known in this context as Biosphere 1). The second biosphere was designed as ‘a prototype for a space colony’ that would eventually enable its deteriorating predecessor, the Earthly biosphere, to reproduce and allow human settler societies to migrate to other planets. The paper draws on the cultural history of the ship in Western culture and on ships and spaceships as archetypes of autarkic enclosures set apart from nature. It argues that Biosphere 2 as an example of a technologically controlled endosphere advanced an understanding of the environment as a ‘life support system’ that emphasized not completeness but systems integrity, and was based on principles of functionality and replaceability. The paper will explore how notions of biospheric life support shaped demands on the natural and social environments in Biosphere 2 and Biosphere 1.  相似文献   
997.
998.
999.
Gross and microscopic studies by early investigators led the cerebral white matter from being regarded as an amorphous mass to an intricately organized system of fasciculi that facilitate the highest expression of cerebral activity. Here we pay homage to the anatomists whose observations resulted in the evolution of ideas about the cerebral white matter. We also draw attention to limitations of the earlier methodologies and to some of the conflicts and controversies that have characterized this field and that persist in the current literature. We conclude with brief reference to the principles of organization of the fiber pathways derived from our studies in the monkey using the autoradiographic tract tracing technique, another step in the ongoing investigations of the cerebral white matter. This historical review has contemporary relevance because the fiber pathways of the brain are crucial components of the distributed neural circuits that subserve nervous system function; the clinical manifestations of white matter damage are recognized with greater frequency and clarity; and magnetic resonance imaging tractography has made it possible to view these fiber bundles within the living human brain.  相似文献   
1000.
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