Abstract: An air-conditioning control system provides an appropriate environment in accordance with a stress level of a person in a room and a use of a space in which the person stays. A deriver derives heartbeat-related parameters based on a body movement of the person. A determiner determines a stress level of the person at a current moment, based on the heartbeat-related parameters. A receiver receives a use of the space for the person. A CPU for appliance control (i) selects a heartbeat-related parameter to be changed, depending on the received use and the heartbeat-related parameters, and (ii) controls operation of the air conditioner to change the selected heartbeat-related parameter to be changed.

Abstract: A plurality of pulse position candidate extraction units characterize waves included in a vibration signal from a vibration sensor using predetermined specific forms and extract respective sets of pulse position candidates. A frequency distribution calculation unit calculates a frequency distribution of the pulse interval and a frequency distribution of variation in pulse intervals on each of the extracted sets of pulse position candidates. A distribution ratio calculation unit calculates the distribution ratio of a modal class to the total frequency in each of the calculated frequency distributions. A selection unit selects a set of pulse position candidates from among the extracted sets of pulse position candidates using the calculated relative frequencies as indicators for evaluating accuracy of the sets of pulse position candidates.

Abstract: A seat portion includes a first layer, a second layer, and a third layer that are stacked sequentially from the surface side to the inner side of the seat portion. The second layer has a higher stiffness than the third layer, and the first layer has a lower stiffness than the third layer. A pressure sensitive part has a pressure sensitive-part body arranged between the first layer and the second layer.

Abstract: An air-conditioning control system provides an appropriate environment in accordance with a stress level of a person in a room and a use of a space in which the person stays. A deriver derives heartbeat-related parameters based on a body movement of the person. A determiner determines a stress level of the person at a current moment, based on the heartbeat-related parameters. A receiver receives a use of the space for the person. A CPU for appliance control (i) selects a heartbeat-related parameter to be changed, depending on the received use and the heartbeat-related parameters, and (ii) controls operation of the air conditioner to change the selected heartbeat-related parameter to be changed.

Abstract: A plurality of pulse position candidate extraction units characterize waves included in a vibration signal from a vibration sensor using predetermined specific forms and extract respective sets of pulse position candidates. A frequency distribution calculation unit calculates a frequency distribution of the pulse interval and a frequency distribution of variation in pulse intervals on each of the extracted sets of pulse position candidates. A distribution ratio calculation unit calculates the distribution ratio of a modal class to the total frequency in each of the calculated frequency distributions. A selection unit selects a set of pulse position candidates from among the extracted sets of pulse position candidates using the calculated relative frequencies as indicators for evaluating accuracy of the sets of pulse position candidates.