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71.
THOMAS F. McILWRAITH 《The Canadian geographer》2010,54(2):253-254
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Walter LaFeber: The Making of a Wisconsin School Revisionist 总被引:1,自引:0,他引:1
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Central to this article is the suggestion that modern planning and development frameworks in England are currently at a potentially productive, although problematic turning point. Whilst on the one hand the UK is attempting to make the legislative and institutional changes necessary to facilitate the process of regionalization and devolution, it is at the same time facing the challenge of ensuring the necessary levels of inter-agency cohesion and integration required for the delivery of the meta-objectives at the heart of sustainable development. Of particular concern for the English regions is the increasing complexity of organizational relations, the fragmentary nature of provisions, the potential mismatch between the need to preserve environmental welfare and at the same time ensure regional economic competitiveness, and more fundamentally, the failure to provide an appropriate mechanism for the evaluation of sustainable development goals. In the light of these challenges, the authors highlight the value of Strategic Environmental Assessment (SEA) as a mechanism for improving the environmental quality of decision-making and make recommendations as to how the regional level of decision-making can provide an effective platform for the development of an SEA system which is capable of reconciling the sustainability conflicts derived from different tiers of decision-making. Within this discussion, suggestions are made as to the manner in which current ideas for introducing sustainability appraisal for Regional Planning Guidance should be amended. 相似文献
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This paper describes the design features and capabilities of a portable automated in‐situ closed chamber (ISCC) for the quantification of CO2 fluxes in dryland soils where both photosynthetic and respiratory components may be associated with a cyanobacterial crust. The processes of CO2 flux in dryland soils are briefly described in order to clarify the conditions that make quantification of these fluxes problematic. The instrumentation currently available for in‐situ soil CO2 flux measurements is then reviewed demonstrating their inadequacies for the dryland environment. The ISCC described here is a member of the closed or enrichment class of soil respiration chambers. The ISCC, however, features an optical window possessing high (>90%) transmission in the photosynthetic active region (PAR) of the solar irradiance spectrum, permitting observations of photosynthesis. The ISCC possesses automatic venting and purging so that gaseous concentrations inside the chamber do not change from ambient sufficiently to significantly affect diffusion. The ISCC features both active and passive cooling employing internal solid‐state Peltier coolers and external aluminised Mylar respectively. This avoids severe disturbance of the microclimate within the chamber due to admission of high fluxes of PAR and permits in‐situ operation under a wide range of ambient field temperatures (~ ?5 to 40°C). Sensors internal to the chamber monitor temperature, relative humidity, irradiance and pressure. In this implementation the ISCC is coupled to a portable gas chromatograph (Agilent GC‐3000) to sample the chamber atmosphere. Indicative data for Kalahari Sand soils of Botswana are presented as an illustration of the general performance characteristics. 相似文献
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THOMAS ZIMMERMANN 《Oxford Journal of Archaeology》2007,26(1):25-33
Summary. The ring‐shaped idol pendant, a distinctive type of Chalcolithic ritual (?) jewellery, is discussed with regard to its chronology in the Balkans in light of its occasional appearance in Asia Minor. Known from domestic contexts, funerals and hoards (?), none of the so far documented Anatolian pendants (clearly another aspect testifying to the well‐known Anatolian–Balkan connections in the fourth millennium BC) can be dated later than the Late Chalcolithic/Early Bronze Age I. This fact provides further evidence for the developing hypothesis that certain inventories from İkiztepe, the only prehistoric reference site on the Turkish Black Sea coast excavated on a large scale, need some profound chronological redating. Selected features and levels dated to ‘Early Bronze Age II–III’ at İkiztepe seem to be several centuries older than currently believed, which has implications for the overall chronological range of these pendants. 相似文献
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