Purpose.The use of anti-friction traction motor support bearings (TMSB) instead of plain friction traction motor support bearings is a priority direction of locomotive development both for newly constructed locomotives and for those in operation.The solution of the set tasks for introduction of wheel-motor blocks (WMB) with anti-friction bearings d
Plants can absorb pollutants produced through industrial activities.In this research, biochemistry and lignin biosynthesis processes are studied in Pinus nigra and P.eldarica trees, that were exposed to pollutants from Sarcheshmeh copper complex and from the Kentuiyeh ascontrol area (both Iran).Needles were collected in areas adjacent to mining fac
This paper investigates the motion planning problem of planar m-link (m≥4) closed chains among point obstacles with extension to arbitrary convex 2-D obstacles.The configuration space (C-space) of closed chains is embedded into two copies of m-3 dimensional tori.Two structural sets, the C-boundaries and the C-obstacles, are analyzed based up
Rice (Oryza sativa L.) is one of the most important staple foods in the world, however most improved rice varieties are susceptible to drought stress.A two-year study was conducted to explore the effects of various drought stresses and subsequent recovery on the accumulation and degradation of proline, total soluble sugar and starch in different ri