Abstract: An air purification system includes a linear electrode that generates electromagnetic resonance; an electric field probe that measures the electric field intensity; and a controller that controls power supplied to the linear electrode. The controller adjusts the frequency of the power supplied to the linear electrode and the position at which the power is supplied to the linear electrode, to maximize an output value of a signal indicating the electric field intensity. Feedback control is performed to make the amount of ozone always constant, by monitoring the amount of ozone generated and adjusting the amplitude modulation of the power supplied, so that ozone necessary for decomposing viruses is generated but harmful nitrogen oxides are not generated as a result of applying, to gas molecules contained in influent gas, an energy that is at least the dissociation energy of oxygen molecules and no greater than the dissociation energy of nitrogen molecules.

Abstract: A scattering tomography device includes: a transmitting antenna element that transmits radio waves into an object from outside; a receiving antenna element that receives, outside the object, scattered waves of the radio waves transmitted into the object; and an information processing circuit that generates an image of the interior of the object using measurement data indicating the scattered waves received by the receiving antenna element. The information processing circuit: derives, using the measurement data, a relational expression that satisfies an equation whose solution is a scattering field function; derives, using the relational expression, an image function that is for generating the image and includes one or more parameters indicating a correspondence between a change in frequency of the radio waves and a change in a dielectric constant of the object in accordance with Debye relaxation; and generates the image using the image function.

Abstract: A magnetic response distribution visualization device includes: an induction circuit that induces a magnetic field component from outside a moving object; a sensor that senses a strength and a phase of the magnetic field at a plurality of points in times outside the moving object; and an information processing circuit that, based on a sensing result of the strength and the phase, a moving speed of the moving object, and a fundamental equation for magnetic fields, calculates a strength and a phase of the magnetic field at a vicinal position closer to the moving object than the sensor, and generates, based on a calculation result of the strength and the phase, a magnetic response distribution image for security inspection that shows a distribution of a response of the moving object to the magnetic field component induced by the induction circuit.

Abstract: A storage battery inspection device includes: an energy storage control circuit that applies an alternating current to a storage battery; a magnetic sensor that senses a magnetic field component outside the storage battery and outputs a magnetic sensor signal indicating the sensed component; a canceling coil that generates a magnetic field component based on an input current to cancel out a magnetic field component generated by magnetization of a magnetic material in the storage battery; a feedback circuit that obtains, from the magnetic sensor signal, a low-frequency signal indicating a magnetic field component having a lower frequency than the alternating current, and applies the input current to the canceling coil based on the low-frequency signal; and a detection circuit that obtains, from the magnetic sensor signal, a detection signal indicating a magnetic field component having the same frequency as the alternating current.

Abstract: A measurement device applies a pulse current or a current of a plurality of frequencies to a laminated body having a plurality of layers having different electrical conductivities. The device acquires in-plane distribution information indicating distribution of a magnetic field of a first plane outside the laminated body. A processor generates three-dimensional magnetic field distribution information indicating a three-dimensional distribution of magnetic field on an outside of the laminated body based on the in-plane distribution information, and generates information on an inside of the laminated body by processing the three-dimensional magnetic field distribution information on the outside of the laminated body. The in-plane distribution information includes information indicating response characteristics to a change in the current applied by the current applying unit.

Abstract: An imaging method includes a step of radiating a wave to a target object, a step of receiving a scattered wave as a result of the wave being scattered at the target object, and a step of reconstructing an image regarding internal information of the target object on the basis of scattered wave data indicating the scattered wave. In the step of reconstructing the image, a reconstruction function is derived by solving a partial differential equation by using the scattered wave data and an analysis model indicating a shape, and the image regarding the internal information of the target object is reconstructed by using the reconstruction function. Here, the partial differential equation is an equation satisfied by the reconstruction function for reconstructing the image regarding the internal information of the target object.

Abstract: A scattering tomography method includes: radiating waves to an object from transmitting antenna elements arranged on a curved surface; receiving scattered waves by receiving antenna elements arranged on the curved surface; and reconstructing an image relating to the information on the interior of the object from scattered wave data representing the scattered waves received by the receiving antenna elements, and in the reconstructing, a function ? for reconstructing the image relating to the information on the interior of the object is set in advance, an equation which a fundamental scattered function satisfies is constructed, a visualization function ? that is obtained by solving the equation is derived from the scattered wave data, and the image relating to the information on the interior of the object is reconstructed using the visualization function.

Abstract: A conductivity distribution derivation method for deriving a conductivity distribution within a battery having an electrode plate that is flat includes: obtaining magnetic field information indicating a magnetic field; and deriving, based on a plurality of relational expressions which (i) an x component of a magnetic field vector in an x direction parallel to the electrode plate, (ii) a y component of the magnetic field vector in a y direction parallel to the electrode plate and perpendicular to the x direction, (iii) the conductivity distribution on a two-dimensional plane parallel to the electrode plate, and (iv) an electric potential distribution on a two-dimensional plane parallel to the electrode plate satisfy, the conductivity distribution that satisfies the plurality of relational expressions with respect to the magnetic field information.

Abstract: A scattering tomography method includes: radiating waves to an object from a plurality of transmitting antenna elements aligned on a side surface of a case; receiving scattered waves by a plurality of receiving antenna elements aligned on the side surface of the case; and reconstructing an image relating to information on an interior of the object using scattered wave data representing the scattered waves. In the reconstructing, a reconstruction function for reconstructing the image relating to the information on the interior of the object is set in advance for a three-dimensional space having the same shape as the case, a scattering field equation which the reconstruction function satisfies is constructed, a visualization function that is obtained by solving the scattering field equation is derived from the scattered wave data, and the image relating to the information on the interior of the object is reconstructed using the visualization function.