Abstract: An estimation device includes at least one of a facial skin temperature acquisition unit and a facial photographic image acquisition unit, and an evaluation unit. The facial skin temperature acquisition unit acquires, in time-series, facial skin temperature data of a facial surface of a subject to which brain function activation information is provided. The facial photographic image acquisition unit obtains, in time-series, facial photographic image data obtained by imaging the facial surface of the subject to which the brain function activation information is provided. The evaluation unit evaluates a degree of interest of the subject based on at least one of the facial skin temperature data acquired by the facial skin temperature acquisition unit and the facial surface photographic image data acquired by the facial surface photographic image data acquisition unit.

Abstract: A physiological state determination system includes a CPU and a camera. The camera acquires a photographic image data of a time-series change in facial data of a subject to which brain function activation information that activates human brain function was provided. The CPU determines a mental or physical physiological state of the subject based on facial change information corresponding to the photographic image data.

Abstract: A driver state determination device includes a facial change information acquisition unit acquiring facial change information indicating a time-series change in facial data of a subject, and a driver state determination unit determining the driver state of the subject based on the facial change information. The subject is selected from the group consisting of a subject driving a machine from when brain function activation information that activates human brain function is provided, a subject driving a machine from when the brain function activation information provided to the subject driving the machine is detected, and a subject performing a predetermined operation on a machine.

Abstract: A useful information presentation device includes a facial skin temperature acquisition unit and/or a blood circulation volume acquisition unit, a brain activity estimation unit, and a useful information presentation unit. The facial skin temperature acquisition unit acquires facial skin temperature data in time-series. The blood circulation volume acquisition unit acquires photographic image data by imaging the facial surface in time-series. The brain activity estimation unit decomposes the facial skin temperature data and/or the facial blood circulation volume data into a plurality of components by singular value decomposition, principal component analysis, or independent component analysis, and the brain activity estimation unit estimating brain activity of the subject based on the plurality of components.

Abstract: An oxygen concentrator includes an oxygen generation unit, an oxygen discharge unit, a respiration waveform sensor connected to at least one of a passage and a cannula, a respiration waveform storage unit that stores a respiration waveform detected by the sensor, a flow amount adjustment unit provided on the passage, and a control unit that controls the flow amount adjustment unit based on the respiration waveform detected. The passage connects the generation unit to the discharge unit. The cannula is attached to the discharge unit. The flow amount adjustment unit discharges the oxygen from the discharge unit, when the sensor does not detect the respiration waveform. The flow amount adjustment unit does not discharge the oxygen from the discharge unit for a predetermined time during an exhalation time, based on the respiration waveform detected by the respiration waveform sensor, when the sensor detects the respiration waveform.

Abstract: A driver state determination device includes a facial change information acquisition unit acquiring facial change information indicating a time-series change in facial data of a subject, and a driver state determination unit determining the driver state of the subject based on the facial change information. The subject is selected from the group consisting of a subject driving a machine from when brain function activation information that activates human brain function is provided, a subject driving a machine from when the brain function activation information provided to the subject driving the machine is detected, and a subject performing a predetermined operation on a machine.

Abstract: An estimation device includes at least one of a facial skin temperature acquisition unit and a facial photographic image acquisition unit, and an evaluation unit. The facial skin temperature acquisition unit acquires, in time-series, facial skin temperature data of a facial surface of a subject to which brain function activation information is provided. The facial photographic image acquisition unit obtains, in time-series, facial photographic image data obtained by imaging the facial surface of the subject to which the brain function activation information is provided. The evaluation unit evaluates a degree of interest of the subject based on at least one of the facial skin temperature data acquired by the facial skin temperature acquisition unit and the facial surface photographic image data acquired by the facial surface photographic image data acquisition unit.

Abstract: A useful information presentation device includes a facial skin temperature acquisition unit and/or a blood circulation volume acquisition unit, a brain activity estimation unit, and a useful information presentation unit. The facial skin temperature acquisition unit acquires facial skin temperature data in time-series. The blood circulation volume acquisition unit acquires photographic image data by imaging the facial surface in time-series. The brain activity estimation unit decomposes the facial skin temperature data and/or the facial blood circulation volume data into a plurality of components by singular value decomposition, principal component analysis, or independent component analysis, and the brain activity estimation unit estimating brain activity of the subject based on the plurality of components.

Abstract: A physiological state determination system includes a CPU and a camera. The camera acquires a photographic image data of a time-series change in facial data of a subject to which brain function activation information that activates human brain function was provided. The CPU determines a mental or physical physiological state of the subject based on facial change information corresponding to the photographic image data.

Abstract: An oral cleaning device includes: a wash water production tank in which wash water to be fed into an oral cavity is produced and stored; a water feed mechanism including a water feed channel having one end connected to the wash water production tank, a carrier configured to carry the wash water in the wash water production tank into the water feed channel, and a release unit connected to an outlet end of the water feed channel to release the wash water into the oral cavity; and an electrical discharge generator which includes a pair of electrodes for inducing streamer discharge in water, and a power supply configured to apply a voltage to the pair of electrodes, and is configured to produce hydrogen peroxide in the water by the streamer discharge.

Abstract: A medical device cleaning device includes a washing tank, and an electrical discharge generator. An endoscope to be cleaned is housed in the washing tank, and immersed in wash water. An electrical discharge unit of the electrical discharge generator is placed in the washing tank, and immersed in the wash water. A direct-current power supply is connected to a pair of electrodes of the electrical discharge unit. When the direct-current power supply applies a voltage to the pair of electrodes, streamer discharge is performed between the pair of electrodes to produce hydrogen peroxide. The endoscope is sterilized in the washing tank by using the hydrogen peroxide produced by the streamer discharge.