A printer managing apparatus includes a physical printer managing unit for managing the outputting of the attribute information of individual physical printers and controlling the outputting of a job to the physical printers, a logical printer attribute information generating unit for logically selecting the attribute information of the physical printer from the physical printer managing unit for managing attribute information of physical printers to generate attribute information of a logical p...

The method and apparatus of this invention provide a condition variable that has a time-out capability for an operating system that does not have one. A condition variable allows concurrent programming and provides high level communication between threads. The condition variable allows threads to wait within a mutex and allows broadcast signals to wake up waited threads. The condition variable is implemented by using counters to count the number of waited threads, the number of signals being sen...

The electric source control device of an internal combustion engine drive vehicle according to the present invention is characterized in that it consists of a primary battery (1) and a secondary battery (2) which are mounted on the internal combustion engine drive vehicle, which are provided with a common terminal (3) of (+) polarity and two independent terminals (4, 5) of (-) polarity and which supply an engine starter and loads with electricity, and a control circuit in which when an engine sw...

A plasma torch used for heating a molten steel has an outer cylinder is provided. The torch includes a double tube, the bottom of which is blocked annularly. The torch also includes a bottomed cylindrical anode electrode that is installed within the outer cylinder with a gap existing between the anode electrode and the inside of the double tube. The plasma torch is provided such that pure copper is not used as a material for the anode electrode, the material has a softening point exceeding 150.d...