This paper investigates a small size wave power device with an impulse turbine installed in the breakwater near Niigata Port, Japan. The device consists of an air chamber, a turbine, a generator and pressure-relief valves. This study reveals the characteristics of each component in this system with impulse turbine and a direct current dynamo the power of which is consumed by a constant resistor. In this paper special features of the impulse turbine are found, and the system characteristics are briefly represented. The overall plant performance was analyzed using mathematical model of an oscillating water column (OWC) based on linear water wave theory and the special features of the impulse turbine.

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The purpose of this study is to analyze the optimum location of fire departments. The idea of this research is to minimize the response time by confirming emergency services dispatched and absence situations. The method of analysis is the calculation of average response times using the optimization algorithm containing a dispatch simulation. We calculated the results by using actual past dispatch data. The results show that the median model shortened traveling distances by about 367m and the simulation model shortened distances by about 438m as compared with the current location.

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