Abstract: A drowsiness detection method that causes a computer to execute a process, the process includes: performing frequency analysis on heartbeat data obtained from a subject; and determining a state of the subject by calculating entropy in a predetermined frequency bandwidth with a peak as a reference, where the peak is within a predetermined frequency range of frequency distribution obtained from the frequency analysis result, determining that the subject is in a relaxation state in a case where the calculated entropy is less than a predetermined threshold value, and determining that the subject is in a drowsiness state in a case where the entropy is equal to or greater than the threshold value.

Abstract: Information to be displayed on a display is generated in such a way that a gateway processes a measured value (with a time stamp) transmitted from a power meter, an appliance monitor, a solar module, and a battery center through a wireless LAN. In the gateway, information relating to the consumed electric energy is synchronized with each other by the time stamp. Further, an integrated value of the consumed electric energy is calculated with respect to time. The information can be secured by obtaining the integrated value of data even if breakdown of devices and the like occurs due to power failure.

Abstract: Control of supplying power to a storage device is performed based on carbon emission strength or a power rate. A battery center 13 that constitutes a storage device 11 performs radio communication with a gateway 4 and is controlled by the gateway 4. The gateway 4 collects a measured value of power consumed by electric appliances in a home and obtains the carbon emission strength in real time. A solar panel 9 is provided and a battery of the storage device 11 is charged with an output of the solar panel. The battery is also charged with direct current power obtained from power from outside. The power is stored in the storage device 11 based on the carbon emission strength by charging control.

Abstract: To solve problems arising when a power conditioner equivalent to that connected to a solar panel is connected to a power storage device. Direct-current power generated by the solar panel 9 is supplied to a DC-DC converter 51 and output as a predetermined direct-current voltage. The output voltage of the converter 51 is supplied to a DC-AC inverter 52. Direct-current power generated by the power storage device 11 is supplied to a DC-DC converter 55. Predetermined direct-current power from the converter 55 is supplied to a DC-AC inverter 56. Alternating-current power output by the inverter 56 is supplied to an alternating-current power system at home. The converter 55 is configured to have two output voltages. The first output voltage is a standby voltage. The second voltage is a voltage at which the inverter 56 starts power supply to outside.

Abstract: An electric power apparatus includes an energy device, a device manager, and a storage system manager.

Abstract: Provided is an electric power apparatus including an energy device, a device manager, and a storage system manager. The electric power apparatus includes an energy device; a device manager; and a storage system manager. The energy device includes at least one of a primary battery, a secondary battery, a capacitor, a solar cell and a fuel cell. The device manager or the storage system manager has storage information. The device manager or the storage system manager receives or transmits the storage information from or to a controller which controls the electric power. The storage system manager and the controller perform mutual or unilateral authentication.

Abstract: A management device of the emission amount or reduction amount of greenhouse gases including: a communication unit that performs communication with an IC card on which an ID and history information on activities outside of a designated area are recorded; a control unit that performs authentication by the read ID via the communication unit, and in a case when authentication is successful, reads the history information via the communication unit, and obtains information relating to the emission amount or reduction amount of greenhouse gases from the read history information; and a display unit that displays the information relating to the emission amount or reduction amount of greenhouse gases.

Abstract: Control of supplying power to a storage device is performed based on carbon emission strength or a power rate. A battery center 13 that constitutes a storage device 11 performs radio communication with a gateway 4 and is controlled by the gateway 4. The gateway 4 collects a measured value of power consumed by electric appliances in a home and obtains the carbon emission strength in real time. A solar panel 9 is provided and a battery of the storage device 11 is charged with an output of the solar panel. The battery is also charged with direct current power obtained from power from outside. The power is stored in the storage device 11 based on the carbon emission strength by charging control.

Abstract: Used electric energy is collected while maintaining accuracy. Information to be displayed on a display 14 is generated in such a way that a gateway 4 processes a measured value (with a time stamp) transmitted from a power meter 2, an appliance monitor 5, a solar module 10, and a battery center 13 through a wireless LAN. In the gateway 4, the used electric energy is synchronized with each other by the time stamp. Further, an integrated value of the used electric energy in the time direction is calculated. The information can be secured by obtaining the integrated value of data even if breakdown of devices and the like due to power failure occurs.

Abstract: To solve problems arising when a power conditioner equivalent to that connected to a solar panel is connected to a power storage device. Direct-current power generated by the solar panel 9 is supplied to a DC-DC converter 51 and output as a predetermined direct-current voltage. The output voltage of the converter 51 is supplied to a DC-AC inverter 52. Direct-current power generated by the power storage device 11 is supplied to a DC-DC converter 55. Predetermined direct-current power from the converter 55 is supplied to a DC-AC inverter 56. Alternating-current power output by the inverter 56 is supplied to an alternating-current power system at home. The converter 55 is configured to have two output voltages. The first output voltage is a standby voltage. The second voltage is a voltage at which the inverter 56 starts power supply to outside.

Abstract: A management device of the emission amount or reduction amount of greenhouse gases including: a communication unit that performs communication with an IC card on which an ID and history information on activities outside of a designated area are recorded; a control unit that performs authentication by the read ID via the communication unit, and in a case when authentication is successful, reads the history information via the communication unit, and obtains information relating to the emission amount or reduction amount of greenhouse gases from the read history information; and a display unit that displays the information relating to the emission amount or reduction amount of greenhouse gases.

Abstract: An electric power apparatus includes an energy device, a device manager, and a storage system manager.