Abstract: In a nebulizer of the present invention, a main body is being mounted with a power supply unit and an oscillation unit generating an oscillation output including a first frequency component and a second frequency component different from each other. A first replacement member is being mounted with an atomization unit configured to atomize, using the first frequency component, a first liquid that is supplied. A second replacement member is being mounted with an atomization unit configured to atomize, using the second frequency component, a second liquid that is supplied. The first and/or the second replacement members include a functional unit configured to operate with an additional frequency component different from the first and second frequency components. A replacement member attached to the main body receives the oscillation output including the first, second and additional frequency components from the main body.

Abstract: A nebulizer comprising a power supply system of the present invention performs wireless power supply from a power transmission-side circuit to a power reception-side circuit. The power transmission-side circuit transmits a power to the power reception-side circuit at a certain oscillation frequency through a power transmission coil. In the power reception-side circuit, a power reception coil and a load configure a power reception-side resonance circuit to determine a resonance frequency of the power reception-side resonance circuit. When the resonance frequency of the power reception-side resonance circuit changes due to a change in an impedance of a load during power supply, a control unit controls an oscillation frequency to maintain a power transmission efficiency from the power transmission-side circuit to the power reception-side circuit.

Abstract: An ultrasonic vibrator driving apparatus performs driving by applying an alternating voltage as a drive voltage to an ultrasonic vibrator that includes a piezoelectric element and has a unique resonance frequency. The drive voltage is generated with a variable frequency in a frequency range including the resonance frequency of the ultrasonic vibrator. The frequency of the drive voltage is repeatedly swept with a predetermined sweep width and a predetermined sweep period so as to include the resonance frequency, based on a reference frequency set according to the resonance frequency of the ultrasonic vibrator. The sweep period and the sweep width are restricted by being associated so as to fall within a predetermined allowed range on a two-dimensional map divided by the sweep period and the sweep width.

Abstract: An object is to provide a cell culture scaffold which makes it possible to recover a cell culture product without being destroyed after cell culturing and a method for producing a cell culture product. The cell culture scaffold according to the present invention includes a substrate having a water-repellent surface and a cell adhesion molecule formed on the water-repellent surface of the substrate. Further, the method for producing a cell culture product according to the present invention includes a step of culturing, using the cell culture scaffold, cells on the surface of the cell adhesion molecule. The cell culture scaffold according to the present invention makes it possible to recover the cells in a spheroid state without causing a damage.

Abstract: An ultrasonic vibrator driving apparatus applies a sine-waveform alternating voltage as a drive voltage via a conversion circuit to an ultrasonic vibrator that has a unique resonance frequency. A first current detector that detects a first current that flows from the drive voltage generator to the conversion circuit and a second current detector that detects a second current that flows from the conversion circuit to the ultrasonic vibrator are included. A frequency controller performs control on the drive voltage generator to change the frequency of a square-waveform alternating voltage so that the difference between the first current and the second current is reduced or approaches a minimum.

Abstract: An ultrasonic vibrator driving apparatus performs driving by applying an alternating voltage as a drive voltage to an ultrasonic vibrator that includes a piezoelectric element and has a unique resonance frequency. The drive voltage is generated with a variable frequency in a frequency range including the resonance frequency of the ultrasonic vibrator. The frequency of the drive voltage is repeatedly swept with a predetermined sweep width and a predetermined sweep period so as to include the resonance frequency, based on a reference frequency set according to the resonance frequency of the ultrasonic vibrator. The sweep period and the sweep width are restricted by being associated so as to fall within a predetermined allowed range on a two-dimensional map divided by the sweep period and the sweep width.

Abstract: An ultrasonic vibrator driving apparatus applies a sine-waveform alternating voltage as a drive voltage via a conversion circuit to an ultrasonic vibrator that has a unique resonance frequency. A first current detector that detects a first current that flows from the drive voltage generator to the conversion circuit and a second current detector that detects a second current that flows from the conversion circuit to the ultrasonic vibrator are included. A frequency controller performs control on the drive voltage generator to change the frequency of a square-waveform alternating voltage so that the difference between the first current and the second current is reduced or approaches a minimum.

Abstract: A sleep evaluation device includes an obtainment unit configured to obtain audio and a determination unit configured to determine a snoring level in the audio obtained by the obtainment unit based on an amount of time for which the audio occurred. The determination unit is configured to determine a snoring level based on a ratio of a cumulative time in which the obtainment unit obtains the audio to a number of times the audio is obtained by the obtainment unit.

Abstract: With an evaluation device, a sleep level of a person being measured is discriminated based on a signal input from a body motion sensor. With the evaluation device, when a go-to-bed button is operated at time T3, time T3 is stored as the go-to-bed time. When a good-night button is operated at time T4, discrimination of sleep level is started. Thereafter, when the good-night button again is operated at time T5, the discrimination of sleep level ends.

Abstract: A sleep evaluation device includes an obtainment unit configured to obtain audio and a determination unit configured to determine a snoring level in the audio obtained by the obtainment unit based on an amount of time for which the audio occurred. The determination unit is configured to determine a snoring level based on a ratio of a cumulative time in which the obtainment unit obtains the audio to a number of times the audio is obtained by the obtainment unit.

Abstract: With an evaluation device, a sleep level of a person being measured is discriminated based on a signal input from a body motion sensor. With the evaluation device, when a go-to-bed button is operated at time T3, time T3 is stored as the go-to-bed time. When a good-night button is operated at time T4, discrimination of sleep level is started. Thereafter, when the good-night button again is operated at time T5, the discrimination of sleep level ends.