Abstract: A parallel driving device that drives parallel-connected semiconductor elements includes a control unit and a gate driving circuit. The control unit detects a temperature difference between the semiconductor elements on the basis of detected values by temperature sensors that detect temperatures of the individual semiconductor elements. The control unit generates a control signal for changing the timing at which to turn on a first semiconductor element specified from the semiconductor elements on the basis of the temperature difference. The gate driving circuit generates a first driving signal for driving the semiconductor elements, and generates a second driving signal that is the first driving signal delayed on the basis of the control signal, and applies the second driving signal to the first semiconductor element.

Abstract: A method and system for calculating profits shared between a power distribution company and a service provider, wherein the power distribution company purchases and resells electric power. The service provider provides consultation service to the power distribution company for planning an optimum power distribution system for increasing power distribution efficiency. The power distribution company shares profits with the service provider based on the measured value of the efficiency of the power distribution operation.

Abstract: A method and system for calculating profits shared between a power distribution company and a service provider, wherein the power distribution company purchases and resells electric power. The service provider provides consultation service to the power distribution company for planning an optimum power distribution system for increasing power distribution efficiency. The power distribution company shares profits with the service provider based on the measured value of the efficiency of the power distribution operation.

Abstract: The power distribution company purchases the electric power from the power generation company and sells retail of the electric power to the electric power customers, and the service provider provides the consultation service to the power distribution company for planning the optimum power distribution system to be constructed with the initial investment and for increasing the power distribution efficiency, and they shares the profit money from the power distribution company based on the measured value of the resultant efficiency of the power distribution operation.

Abstract: The present invention is drawn to a tetracyclododecene composition having a regulated cyclopentadiene trimer content, whereby addition polymerization with the aid of a Ziegler catalyst can be carried out while preventing gelation caused by a cross-linking reaction. A tetracyclododecene composition regulated with respect to the content of a specific ingredient having a molecular weight of 188 is disclosed, whereby polymers having high glass transition temperatures can be obtained through various polymerizations. Further, the present invention is drawn to a method for producing tetracyclododecene in the presence of an aliphatic solvent having a boiling point close to that of norbornene, which solvent is effective in inhibiting the recovered norbornene from solidifying.