paleolithic lithic assemblages are traditionally described on the bases of presence of a variety of tool types(typology) and of different knapping technologies. in this study we tried to investigate whether the presence ofdifferent groups of scrapers in the mar-tarik site assigned to the middle paleolithic represent specific function orjust different stages of the reduction process and constant...

For centuries, specific instruments or regular toothbrushes have routinely been used to remove tongue biofilm and improve breath odor. Toothbrushes with a tongue scraper on the back of their head have recently been introduced to the market. The present study compared the effectiveness of a manual toothbrush with this new design, i.e., possessing a tongue scraper, and a commercial tongue scraper...

One of the main parameters of quality the scraper or collimation systems is minimizing the yield of primary particles from system in cyclic and linear accelerators. From this viewpoint in paper the choice of materials the target, scraper and collimators, and its geometrical sizes is considered taking into account the energy and parameters of formed beam.

Security of a key exchange protocol is formally established through an abstract game between a challenger and an adversary. In this game the adversary can get various information which are modeled by giving the adversary access to appropriate oracle queries. Empowered with all these information, the adversary will try to break the protocol. This is modeled by a test query which asks the adversa...

The development of the next generation of ultra-low energy antiproton and ion facilities requires precise information about the beam emittance to guarantee optimum performance. In the Extra-Low ENergy Antiproton storage ring (ELENA) the transverse emittances will be measured by scraping. However, this diagnostic measurement faces several challenges: non-zero dispersion and systematic errors due...

This paper describes the biomechanics of an unusual form of wing stridulation in katydids, termed here 'reverse stridulation'. Male crickets and katydids produced sound to attract females by rubbing their forewings together. One of the wings bears a vein ventrally modified with teeth (a file), while the other harbours a scraper on its anal edge. The wings open and close in rhythmic cycles, but ...

In order to fully examine the breadth of possibility in sports data analysis, we look at two areas of differing scope. The first is scalable and generalizable, exploring the expected performance of athletes in track and field events by means of a datacentric model. It takes Athletic.net data using an in-house web scraper and fits past results against a corpus in order to predict future results ...

Autonomous mobile robot scrapers are increasingly used in order to clean the floors on dairy farms. Given the complexity of robot scraper operation, stress may occur in cows due to unpredictability of the situation. Experiencing stress can impair animal welfare and, in the long term, the health and milk production of the cows. Therefore, this study addressed potential stress responses of dairy ...