Energy harvesting that are able to operate in higher temperature gradients, and that can conduct electricity well without also conducting heat (something that was until recently thought impossible ), will result in increased efficiency. Future work in thermoelectrics could be to convert wasted heat, such as in automobile engine combustion, into electricity. This type of harvesting is based on the changing capacitance of vibration-dependent capacitors. Vibrations separate the plates of a charged variable capacitor, and mechanical energy is converted into electrical energy. Electrostatic energy harvesters need a polarization source to work and to convert mechanical energy from vibrations into electricity. The polarization
Technological and industrial history of China the People's Republic of China). This led to a shortage of skilled personnel that seriously hampered the industrial sector's implementation of imported modern technology and independent development of new management and production forms. In 1980 a modern management training center was established in Dalian, Liaoning, with the help of foreign experts. In 1987 many Dalian graduates found it difficult to use their newly acquired skills because managerial autonomy was lacking, and many cadres had a vested interest in maintaining the status quo. It was then unclear what effect students educated abroad were having on industry. China is well endowed with