The paper deals with the Palaeolithic materials found on right bank of Dniester River, in vicinity Balamutivka Village, Chernivtsi Oblast, since 1950s. Several sites, which have been recently discovered here, are published detail for first time. Particular attention is paid to finds flint artefacts from caves located near village.
 Within and further northeast, there many sites associated ...

Modern social networks have become sources for vast quantities of data. Having access to such big data can be very useful for various researchers and data scientists. In this paper we describe Loklak, an open source distributed peer to peer crawler and scraper for supporting such research on platforms like Twitter, Weibo and other social networks. Social networks such as Twitter and Weibo pose ...

Beam lifetime studies for the SPEAR3 storage ring are presented. The three lifetime components are separated with lifetime measurements under various combinations of beam currents and fill patterns and vertical scraper scans. Touschek lifetime is studied with rf voltage scans and with the horizontal or vertical scrapers inserted. The measurements are explained with calculations based on the cal...

A powered roof support is an element of a longwall complex. It connected with scraper conveyor by sliding system. The carries shearer mining the coal. second function to protect excavation against uncontrolled impact rock mass. This paper focuses on analysis effectiveness support. main objective determine factors influencing failure-free operation in exploitation process. Moreover, author discu...

BACKGROUND Halitosis is a common problem that affects a large portion of the population worldwide. The origin of this condition is oral in 90% and systemic in 10% of cases. The unpleasant odor is mainly the result of volatile sulfur compounds produced by Gram-negative bacteria. However, it has recently been found that anaerobic Gram-positive bacteria also produce hydrogen sulfide (H2S) in the p...