Abstract: To efficiently record logs, a log recording apparatus includes a log recording memory, an access control unit that acquires contents of an access from a CPU to a memory space, a log-recording-condition storage unit that has a log recording condition stored therein, and a log-recording-condition determination unit that determines, every time the access control unit acquires the access contents, whether the acquired access contents satisfy the log recording condition stored in the log-recording-condition storage unit. The access control unit is configured to store access contents determined as satisfying the log recording condition by the log-recording-condition determination unit in the log recording memory, and does not store access contents determined as not satisfying the log recording condition by the log-recording-condition determination unit in the log recording memory.

Abstract: Provided is a multi-wireless connection device that point-to-multipoint connects a communication link between a plurality of cellular phones to be connected to a cellular network, and a cordless phone that remote controls an outgoing call from the plurality of cellular phones to the cellular network or an incoming call from the cellular network to the plurality of cellular phones. The multi-wireless connection device maintains the synchronization within the Bluetooth network and performs point-to-multipoint connection by transmitting and receiving control data between the plurality of cellular phones via an ACL link.

Abstract: The feature of the present invention resides in that when a polyelectrolyte coagulant is added to sludge to dewater the sludge in a sewage treatment plant, the dosage level of the polyelectrolyte coagulant to be to the sludge is controlled most properly, whereby moisture content of dewatered cake can be minimized.