For the production of building reinforcing steel, special charge components were used, consisting steel waste, cast iron shavings and about 20 % NVG pellets. Steel was smelted in a 60-ton electric arc furnace. The pouring liquid carried out on continuous casting machine. Heat treatment immediately after rolling operation to improve physical mechanical properties construction steels melted furna...

The paper introduces an operation on a binary tree, called binary tree roll, or roll of a binary tree. Two versions of the binary tree roll, counterclockwise and clockwise, are presented. The operations are mathematically defined and graphically presented. It is explained how the binary tree roll actually coincides with the process of turning the entire tree 90 degrees counterclockwise or clock...