Ricoh Company, Ltd.

Takashi Masuya

Hideo Goto

Hideo Gotoh

Yoshio Uratani

Shigeo Iwata

Manabu Nakanishi

A worker transfers GPS signals to a communication system at each node of traveling using a cellular phone terminal, and the communication system specifies the position of the cellular phone terminal and notifies positional information to a management system. When the cellular phone terminal cannot receive GPS signals or is outside a range accessible to the communication system, it starts recording acceleration data using an accelerometer. When a communicable state is recovered, the cellular phone terminal sends GPS signals and the recorded acceleration data to the communication system. A management computer determines whether the position notified by the communication system is an intended node. If the notified position is not an intended node, the management computer derives the position of the intended node using the acceleration data, and predicts the travel route based on the node position.

Positional information management system, positional information management method, recording medium, and mobile terminal

A work management apparatus generates a temporary shift table in which scheduled work times of employees are temporarily set, based on an employee information file and work management file stored in a file memory. The work management apparatus sends the generated temporary shift table to a plurality of portable terminals over a network. When receiving, over the network, response information sent from the plurality of portable terminals in response to the sent temporary shift table, the work management apparatus generates a settled shift table in which scheduled work times of employees are settled, based on the received response information. The work management apparatus automatically sends the generated settled shift table to the plurality of portable terminals over the network.

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Kanagawa, Japan

Takashi Masuya