Abstract: An activity meter (100) includes (i) a sleep level judging section (112) for repeatedly detecting a sleep level of a user and (ii) a notifying section (113) for automatically notifying the user of specific information only during a period during which a most recent sleep level is less than a predetermined level.

Abstract: An activity meter (100) includes (i) a sleep level judging section (112) for repeatedly detecting a sleep level of a user and (ii) a notifying section (113) for automatically notifying the user of specific information only during a period during which a most recent sleep level is less than a predetermined level.

Abstract: An activity meter (100) includes (i) a sleep level judging section (112) for repeatedly detecting a sleep level of a user and (ii) a notifying section (113) for automatically notifying the user of specific information only during a period during which a most recent sleep level is less than a predetermined level.

Abstract: An activity meter (100) includes (i) a sleep level judging section (112) for repeatedly detecting a sleep level of a user and (ii) a notifying section (113) for automatically notifying the user of specific information only during a period during which a most recent sleep level is less than a predetermined level.

Abstract: An electronic apparatus has a presence information generator that generates a presence information indicating whether or not a user of the electronic apparatus is in a room or a home in which the electronic apparatus is placed. A power supply outlet of the apparatus supplies power to another electronic appliance. A power supply status detector detects a state of power supply being supplied to the another electronic appliance by the power supply outlet. The presence information generator generates the presence information in accord with the state of power supply to the another electronic appliance, where the status of the power supply is obtained by the power supply status detector.

Abstract: A status information acquisition portion acquires status information as to electronic apparatus and users by detecting the operating status and/or controlled status of electronic apparatus and/or directly detecting the user status by various sensors etc. A user status information generator generates information as to what condition the user is in based on the apparatus status information and/or user status information acquired by the status information acquisition portion. A user status output portion, based on the judgement of the user status information generator, informs the user status by flashing a presence indicator or displaying the status on a television display.

Abstract: When an apparatus C which shares the media with apparatuses A and B desires to transmit an RTS packet, apparatus C inhibits transmission of the RTS packet for a fixed waiting time Tm plus a transmission inhibition period which varies depending on a type of a packet in a sensed carrier. In other words, when apparatus C senses an RTS packet of apparatus A, apparatus C inhibits transmission for a packet transmission inhibition period 101 resulting from reception of RTS. When apparatus C senses a CTS packet of apparatus B, apparatus C inhibits transmission for a packet transmission inhibition period 102 resulting from reception of CTS. When apparatus C senses a data packet, apparatus C inhibits transmission for a packet transmission inhibition period 103 resulting from reception of a data packet. When apparatus C senses an ACK packet of apparatus B, apparatus C inhibits transmission for a packet transmission inhibition period 104 resulting from reception of an ACK.

Abstract: A communication apparatus includes a memory. The memory stores the protocol of an ASK system and the protocol of an IrDA system. These protocols require predetermined time periods of T1 and T2 prior to establishing a connection with a station of the other party. The memory further stores time periods of Ra, Rb, Sa, and Sb, where the relationship of (Ra+Rb).noteq.(Sa+Sb), Sa>T1, Sb>T2, Rb>T2 is established. The communication apparatus further includes a transmission circuit and a reception circuit for the ASK system, a transmission circuit and a reception circuit for the IrDA system, a timer, and a control circuit. The control circuit controls the transmission circuit, the reception circuit, and the timer while referring to the stored contents of the memory.