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The huge scientific and interpretive value of wetland archaeological sites has been well demonstrated in several studies. The management of the archaeological resource of wetland landscapes is problematic, however, and there is an urgent need for noninvasive techniques to detect waterlogged organic archaeological remains. Stationary wooden fishing structures associated with fishing sites constitute an important wetland archaeological resource in northern Europe. In Finland, similar wooden constructions have been used for fishing from prehistory to the early modern era. The discovery of sites has been accidental, because the waterlogged organic remains have been considered invisible to conventional geoprospection techniques. Because of this, a small project was launched at Lamminoja, northwest Finland, in order to investigate whether it would be possible to improve our chances to detect fishery sites in demanding wetland habitats. New information was obtained through geophysical prospection, trial excavations, and accelerator mass spectrometry (AMS) dating. Geophysical testing was hampered by several factors, including complex sediments affected by modern drainage. New information was obtained, however, on the composition, age, and spatial distribution of the wooden fishing structures preserved in peat over 5000 years. 相似文献
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Speybroeck N Paraje G Prasad A Goovaerts P Ebener S Evans DB 《Geographical analysis》2012,44(2):151-161
This article discusses options to allow comparative analysis of inequalities in the distribution of health workers (HWs) across and within countries using a single summary measure of the distribution. Income inequality generally is measured across individuals, but inequalities in the dispersion of HWs must use geographical areas or population groupings as units of analysis. The article first shows how this change of observational unit creates a resolution problem for various inequality indices and then tests how sensitive a simple ratio measure of the distribution of HWs is to changes in resolution. This ratio of inequality is illustrated first with the global distribution of HWs and then with its distributions within Indonesia. The resolution problem is not solved through this new approach, and indicators of inequalities of access to HWs or health services more generally appear not to be comparable across countries. Investigating geographical inequalities over time in one setting is possible but only if the units of analysis remain the same over time. 相似文献
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Minna Leino Ari T. Ruuskanen Juha Flinkman Jussi Kaasinen Ulla E. Klemelä Riikka Hietala Niko Nappu 《International Journal of Nautical Archaeology》2011,40(1):133-150
Vrouw Maria, a merchant vessel sailing from Amsterdam to St Petersburg in 1771, ran aground in the northern Baltic Sea. Her cargo included Dutch works of art bought by Catherine the Great. The wreck was located in 1999, 41 m deep. This study aims to understand environmental factors and physical stresses affecting the wreck, using three different approaches—studying the wreck as an artificial reef; describing the conditions inside the wreck; and measuring the physical stresses caused by currents. The methods applied were biological, archaeological, hydrological, geological and physical. The data will be a basis for further monitoring. © 2010 The Authors 相似文献
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