Abstract: A mental and physical condition estimation system according to the present disclosure includes: a heart rate information acquisition unit for acquiring heart rate information that is information related to a heart rate of a subject person; a heart rate variability calculation unit for calculating heart rate variability of a very low frequency component (VLF) from the acquired heart rate information; and a mental and physical condition estimation unit for estimating a concentration and effort state of the subject person from a calculated value of the heart rate variability.

Abstract: The information processing system includes a classification unit, an acquisition unit, a selection unit, an evaluation unit, and a generation unit. The classification unit classifies a plurality of fragrances into segments defined corresponding to a combination of one of first classification items on a first classification axis with one of second classification items on a second classification axis. The acquisition unit accepts input of information related to the first classification axis from the target person. The selection unit determines one of the first classification items based on the information and selects a fragrance for evaluation from each of segments that correspond to the first classification item and whose second classification items differ from each other. The evaluation unit acquires, for each of the fragrances for evaluation, evaluation information of a scent from the target person.

Abstract: A heat exchanger having a polyamine on at least part of a surface of the heat exchanger. The existence of polyamine on the surface of the heat exchanger allows the odor components to be temporality held by virtue of the action of polyamine, and the odor components are not released into an interior room or the like at once in conjunction with the evaporation of free water (such as condensed water). Thus, the release of odor components is made moderate, and changes in the concentration of odor components in the interior room are reduced, so that strong odors sensed by people are suppressed. A typical example of the polyamine is PEI, and a typical example of the heat exchanger is an evaporator used in a car air-conditioner.

Abstract: A concentration of ethanol is detected without using any light source such as a lamp by utilizing a face of a human being as a light source.

Abstract: A concentration of ethanol is detected without using any light source such as a lamp by utilizing a face of a human being as a light source.