Abstract: A Java applet execution/processing apparatus is provided in a client that can be connected to a server having Java applet and an execution module. At the time when performing predetermined processing using the Java applet and execution module, the Java applet execution/processing apparatus performs the predetermined processing using Java applet stored in the client in the case where it is determined that the Java applet on the server side has not been updated relative to the Java applet that has already been downloaded and stored in the client. The Java applet execution/processing apparatus comprises: a time zone setting section that sets a time zone during which the predetermined processing is not performed; and a Java applet update section that downloads and stores updated Java applet in the case where there exists, on the server side, Java applet that has been updated relative to the Java applet on the client during the set time zone.

Abstract: A double reverse revolution propeller apparatus includes front and rear propeller wherein the rear propeller is rotated at higher speeds than the front propeller. When seizure occurs, an inner shaft is disconnected from an engine at an inner shaft connection unit and is connected to an outer shaft at an inner and outer shaft connection unit to be driven in the same direction as the outer shaft. The ratio of absorption horsepower of the front propeller to the rear propeller can to be substantially equal to the ratio of rotational speed of the front propeller to that of the rear propeller. One or both of the front and rear propeller can include a variable pitch propeller. The front propeller can have more blades than the rear propeller.