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
Dalian University of Technology of Dalian. This Dalian-based program taught Chinese students MBA courses offered by State University of New York at Buffalo, complemented by subjects relating to China's enterprise management practice delivered by the then Dalian Institute of Technology. DUT experienced consistent growth of over half a century, and having gone through the persistent efforts of several generations, DUT has developed into a comprehensive university with a primary emphasis still on science and technology. In 2007, Dalian Institute of Semiconductor Technology (DIST) was jointly set up by Intel, Dalian's municipal government, and Dalian University of Technology, and managed by the university. Intel donated