Mechanical energy nonconservative forces, like frictional forces, will be present, but often they are of negligible values and the mechanical energy's being constant can therefore be a useful approximation. In elastic collisions, the mechanical energy is conserved but in inelastic collisions, some mechanical energy is converted into heat. The equivalence between lost mechanical energy (dissipation) and an increase in temperature was discovered by James Prescott Joule. Many devices are used to convert mechanical energy to or from other forms of energy, e.g. an electric motor converts electrical energy to mechanical energy, an electric generator converts mechanical energy into electrical energy and a
Port of Dalian (DCT) controlled operations at seven container berths while the Dalian Port Container Terminal (DPCT) operated five container berths and the Dalian International Container Terminal operated two. In August 2017, all entities merged to form one operating entity under the DCT. All three of the previous entities had varying degrees of international investment including Nippon Yusen (Japan), Singapore Dalian Port Investment and PSA China. In early 2017, it was reported that the Dalian Port and Yingkou Port Group would enter into a ‘corporation framework agreement’ to integrate port management in Liaoning province. The province would form a new company to run