Abstract: An aerosol reachable area estimation system includes a detector that detects a voice and a controller that estimates an area reachable by aerosol released to a space where an utterer who has emitted the voice detected by the detector exists from a speech sound included in the voice on a basis of a correlation between the speech sound and a velocity vector of aerosol released from the utterer when the utterer utters the speech sound and a position and a direction of the utterer's mouth.

Abstract: A component analysis device includes a data acquisition circuit that acquires spectral data of an analyte containing components, the spectral data being obtained by measuring a spectrum of the analyte with a sensor, a type acquisition circuit that acquires information indicating a type of the analyte, a storage that stores a reference spectral data set including multiple spectral data of substances each of which is estimated to be included in the analyte, the reference spectral data set corresponding to the type of the analyte, and an analysis circuit that performs a parallel factor analysis by using, as input data, the spectral data of the analyte and the reference spectral data set.

Abstract: An aerosol quantity estimation system includes a detector that detects a voice and a controller that estimates a number of aerosol particles released to a space where an utterer who has emitted the voice detected by the detector exists from a certain speech sound included in the voice on a basis of a correlation between the certain speech sound and a number of aerosol particles released from the utterer when the utterer utters the certain speech sound. An aerosol quantity estimation method includes detecting a voice and estimating a number of aerosol particles released to a space where an utterer who has emitted the detected voice exists from a certain speech sound included in the voice on a basis of a correlation between the certain speech sound and a number of aerosol particles released from the utterer when the utterer utters the certain speech sound.

Abstract: An aerosol measurement apparatus for measuring an aerosol contained in a scatterer present in an atmosphere includes a light source, an optical element (i) that irradiates the scatterer with interfering light produced by causing emitted light emitted from the light source to interfere in an interior of the optical element, the interfering light having a plurality of peaks spaced at frequency intervals equal to one another, and (ii) that emits Mie scattered light by causing scattered light generated in the scatterer to interfere in the interior, and a photodetector that receives the Mie scattered light and outputs a signal corresponding to an intensity of light received.

Abstract: A display apparatus includes a display screen, and a controller that causes the display screen to display a composite image in which a first image acquired by imaging a space by a camera and a second image representing at least one type of aerosol existing in the space are combined. The position of the at least one type of aerosol as seen in a depth direction in the first image is reflected in the second image.

Abstract: A measurement apparatus includes a light source, an interferometer, a light receiver, and a signal processor. The light source emits laser light to a scatterer in the atmosphere. The laser light has multiple oscillation frequencies separated from each other at equal frequency intervals. The interferometer produces interference in scattered light generated as a result of the laser light being scattered by the scatterer. The light receiver receives Mie scattered light included in the scattered light subjected to the interference produced by the interferometer and generates a signal. The signal processor detects the quantity of the Mie scattered light based on the signal. Each of the equal frequency intervals is smaller than the full width at half maximum of the peak of a frequency spectrum of Rayleigh scattered light. The Rayleigh scattered light is generated as a result of the laser light being scattered by molecules forming the atmosphere.

Abstract: A light observation apparatus includes: a first photodetector that, upon irradiation of at least part of a physical object with irradiation light, receives first light containing ambient light and at least one selected from the group consisting of reflected light returning from the at least part and fluorescence produced from the at least part, and that outputs a first output signal representing a reception intensity of the first light; a second photodetector that receives second light containing the ambient light and outputs a second output signal representing a reception intensity of the second light; and a signal processing circuit. The signal processing circuit attenuates a first signal component corresponding to the ambient light from the first output signal based on the first output signal and the second output signal.

Abstract: A scatterer measurement method includes: radiating a first irradiating light that passes through a first space in which a scatterer is present; receiving a first scattered light produced by the first irradiating light being scattered by the scatterer; after the scatterer has moved from the first space to a second space at least partially different from the first space, radiating a second irradiating light that passes through the second space; receiving a second scattered light produced by the second irradiating light being scattered by the scatterer; and calculating a velocity of the scatterer based on a difference between a first point in time at which the first scattered light was received and a second point in time at which the second scattered light was received and a distance that the scatterer moved during a period from the first point in time to the second point in time.

Abstract: An aerosol measurement apparatus for measuring an aerosol contained in a scatterer present in an atmosphere includes a light source, an optical element (i) that irradiates the scatterer with interfering light produced by causing emitted light emitted from the light source to interfere in an interior of the optical element, the interfering light having a plurality of peaks spaced at frequency intervals equal to one another, and (ii) that emits Mie scattered light by causing scattered light generated in the scatterer to interfere in the interior, and a photodetector that receives the Mie scattered light and outputs a signal corresponding to an intensity of light received.

Abstract: A measurement apparatus includes a light source, an interferometer, a light receiver, and a signal processor. The light source emits laser light to a scatterer in the atmosphere. The laser light has multiple oscillation frequencies separated from each other at equal frequency intervals. The interferometer produces interference in scattered light generated as a result of the laser light being scattered by the scatterer. The light receiver receives Mie scattered light included in the scattered light subjected to the interference produced by the interferometer and generates a signal. The signal processor detects the quantity of the Mie scattered light based on the signal. Each of the equal frequency intervals is smaller than the full width at half maximum of the peak of a frequency spectrum of Rayleigh scattered light. The Rayleigh scattered light is generated as a result of the laser light being scattered by molecules forming the atmosphere.

Abstract: A component analysis device includes a data acquisition circuit that acquires spectral data of an analyte containing components, the spectral data being obtained by measuring a spectrum of the analyte with a sensor, a type acquisition circuit that acquires information indicating a type of the analyte, a storage that stores a reference spectral data set including multiple spectral data of substances each of which is estimated to be included in the analyte, the reference spectral data set corresponding to the type of the analyte, and an analysis circuit that performs a parallel factor analysis by using, as input data, the spectral data of the analyte and the reference spectral data set.

Abstract: A display apparatus includes a display screen, and a controller that causes the display screen to display a composite image in which a first image acquired by imaging a space by a camera and a second image representing at least one type of aerosol existing in the space are combined. The position of the at least one type of aerosol as seen in a depth direction in the first image is reflected in the second image.

Abstract: A purifying method includes determining an intended position that ejected matter ejected from an ejecting apparatus is made to reach; judging whether an object touches the ejected matter within a period of time from ejection of the ejected matter from the ejecting apparatus to reaching of the ejected matter to the intended position based on positional information on the object, the positional information being obtained by a first sensor; and controlling, based on a result of the judging, how the ejecting apparatus ejects the ejected matter into an area including the intended position.

Abstract: A purifying apparatus includes: an optical sensor that outputs an electrical signal, the optical sensor including a light source that emits first light and a photodetector that receives second light from a region irradiated with the first light; a determination circuit that determines the presence or absence of a physical object in the region and generates an image representing a determination result, the determination circuit including a signal processing circuit that processes the electrical signal; a spray that sprays a cleansing agent through a spray nozzle, the spray including the spray nozzle; a range finder that measures a distance from the spray nozzle to the physical object; and a controller that controls, according to the distance, spraying of the cleansing agent by the spray.

Abstract: A light observation apparatus includes: a first photodetector that, upon irradiation of at least part of a physical object with irradiation light, receives first light containing ambient light and at least one selected from the group consisting of reflected light returning from the at least part and fluorescence produced from the at least part, and that outputs a first output signal representing a reception intensity of the first light; a second photodetector that receives second light containing the ambient light and outputs a second output signal representing a reception intensity of the second light; and a signal processing circuit. The signal processing circuit attenuates a first signal component corresponding to the ambient light from the first output signal based on the first output signal and the second output signal.

Abstract: A treatment liquid production device includes a first tank; a first plasma generating device that includes a first pair of electrodes and a first power supply, the first power supply applying a voltage between the first pair of electrodes, the first plasma generating device generating plasma in a liquid in the first tank; a second tank; a second plasma generating device that includes a second pair of electrodes and a second power supply, the second power supply applying a voltage between the second pair of electrodes, the second plasma generating device generating plasma in a liquid in the second tank; and a controller operative to produce a first treatment liquid having a high initial oxidizing power during a first period and a second treatment liquid having a high remaining oxidizing power during a second period which is longer than the first period.

Abstract: A method comprises: bringing a plasma-treated liquid having an oxidizing power into contact with an object in an area; and mixing water and the plasma-treated liquid which remains in the area after the plasma-treated liquid is brought into contact with the object.

Abstract: A method comprises: bringing a plasma-treated liquid having an oxidizing power into contact with an object in an area; and mixing water and the plasma-treated liquid which remains in the area after the plasma-treated liquid is brought into contact with the object.

Abstract: A treatment liquid production device includes a first tank; a first plasma generating device that includes a first pair of electrodes and a first power supply, the first power supply applying a voltage between the first pair of electrodes, the first plasma generating device generating plasma in a liquid in the first tank; a second tank; a second plasma generating device that includes a second pair of electrodes and a second power supply, the second power supply applying a voltage between the second pair of electrodes, the second plasma generating device generating plasma in a liquid in the second tank; and a controller operative to produce a first treatment liquid having a high initial oxidizing power during a first period and a second treatment liquid having a high remaining oxidizing power during a second period which is longer than the first period.

Abstract: A blood sugar condition is estimated by measuring a urine sugar value, discriminating whether it is less than a discriminating method classification boundary value, when it is less, obtaining an averaged value of measured urine sugar values during a past predetermined period of time, measured at the same time of day as the latest measurement, calculating the difference between the averaged and measured urine sugar values, when the difference is not less than a positive discriminating reference difference, discriminating as being a blood sugar value decrease, when the measured value is not less than the discriminating method classification boundary value, obtaining an averaged value of all measured values during the past predetermined period of time, calculating a ratio between the measured and averaged values, and, when the ratio is not greater than a first discriminating reference ratio, discriminating as being the blood sugar value decrease.