Interest in political history and the supreme state power is growing due to the recognition of the state importance.The purpose of the article is to analyze the structure of the supreme Animation authorities in the first period of Russian statehood.The research references studies of the early Slavic statehood.In the first period of Russian statehoo
Abstract Background Across the Metazoa, similar genetic programs are found in the development of analogous, independently evolved, morphological features.The functional significance of this reuse and the underlying mechanisms of co-option remain unclear.Cephalopods have evolved a highly acute visual system with a cup-shaped retina and a novel refra
Recently, the 5-axis machining of gears has become increasingly important.This technology enables a flexible production of diverse Vanity Bathroom Mirror gear types on a single universal machine with standard tools.In addition to the economic aspects, the focus is on the high quality standards that has to be achieved.This paper deals with hard mach
Optical vortices (OVs), as eigenmodes of optical orbital angular momentum, have been widely used in particle micro-manipulation.Recently, perfect optical vortices (POVs), a subclass of OVs, are gaining increasing interest and becoming an indispensable tool in optical trapping due to their unique property of topological charge-independent vortex rad
This article reports the numerical study of natural convection in a differentially heated cylindrical annular enclosure with a thin baffle attached to inner wall.The inner and outer walls of the annulus are Horse Chestnut respectively maintained at higher and lower temperatures, whereas the top and bottom walls are thermally insulated.Using an impl