The aim of this paper is to analyze the mechanical properties Robinia pseudoacacia L. (black locust), Platanus × hybrida Brot. (London plane), Ulmus pumila (Siberian elm), and Populus alba (white poplar), estimated using ultrasound wave equipment (USLab y Sylvatest Duo) impact (Microsecond Timer) on standing trees, felled logs specimens obtained from different parts trees. Bending strength, axi...

It is shown that the right-adequate duo ring with a nonzero Jacobson radical has stable range one. established class of complete matrices order 2 over elementary divisors Some classes unit-regular and clean are investigated.

The existence of the "Galombang Duo Baleh" Dance among young generation cultural heirs in Nagari Pitalah is an alarming condition. It clear that lack interest younger learning and preserving because many other interesting things can be played from home without having to gather at Sasaran. evident Sasaran has begun abandoned as a forum for various including silat games entertainment village chil...