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Abstract

The paper discusses the discovery of a single lithic artefact from the Dąbrowa Tarnowska 37 site. The lithic, based on its technological and typological characteristics, can be associated with the Middle Palaeolithic. This is an important find due to the fact that, in the area of the Sandomierz Basin, settlement of that period is confirmed by only a few single finds discovered exclusively in the eastern and central parts of the basin. The lithic has been defined as a Levallois point, although a different interpretation, such as its being a by-product of Levallois core shaping, can not be excluded. It was made of Jurassic flint of undetermined provenance, probably originating from moraines. Precise dating of the find is not possible. It was been found on the surface of fluvioglacial deposit of South Polish glaciation (Elsterian) age. The chronological framework of this glaciation preceded the well-proven use of Levallois techniques in the south of Poland (Biśnik cave, Ciemna cave, Kraków-Zwierzyniec 1).
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Abstract

Three methods of estimating radii of spray droplets are discussed and results of their practical application in the case of explosively produced water spray are reported. Parameters of model radii distributions are fitted using the least squares method. Finally, the data obtained for a number of tests are used for estimating fraction of explosion energy used for pulverization of water in the process of explosive production of water-spray.
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