Abstract: In a pneumatic tire including a tread portion extending in a tire circumferential direction and having an annular shape, a pair of sidewall portions respectively disposed on both sides of the tread portion, a pair of bead portions each disposed on an inner side of the pair of sidewall portions in a tire radial direction, and a transponder embedded, a composite sheet that includes a dielectric forming a substrate and a conductor periodically disposed on the dielectric and functions as an artificial magnetic conductor is disposed on an inner side in a tire width direction of the transponder.

Abstract: A wave receiving plate is pivotably supported by a support device in the wave force generation system and includes a flexible plate in at least a part of the wave receiving plate.

Abstract: The present technology provides an acoustic transmission member that includes a core layer layered between two skin layers, the skin layers being formed of a material having a higher elastic modulus than a material of the core layer. A thickness ds of the skin layers is formed such that Equation (1) is satisfied, where f is the center frequency of the transmission frequency band, cw is the acoustic velocity in the medium surrounding the acoustic transmission member, ? is the wavelength corresponding to the center frequency in the medium, Cds is the longitudinal wave acoustic velocity in the skin layer, and n is a discretionary natural number.

Abstract: A wave receiving plate is pivotably supported by a support device in the wave force generation system and includes a flexible plate in at least a part of the wave receiving plate.

Abstract: The present technology provides an acoustic transmission member that includes a core layer layered between two skin layers, the skin layers being formed of a material having a higher elastic modulus than a material of the core layer. A thickness ds of the skin layers is formed such that Equation (1) is satisfied, where f is the center frequency of the transmission frequency band, cw is the acoustic velocity in the medium surrounding the acoustic transmission member, ? is the wavelength corresponding to the center frequency in the medium, Cds is the longitudinal wave acoustic velocity in the skin layer, and n is a discretionary natural number.

Abstract: To obtain a sound-transmitting member having a wide sound-transmitting band in a high frequency region. A planar sound-transmitting member having sound-transmitting properties includes two skin layers, N+1 core layers, and N intermediate layers (N=1), in which the core layer and the intermediate layer are alternately stacked between the skin layers. The skin layers and the intermediate layer are formed of carbon fiber reinforced plastics (CFRP), which is a material having a higher elastic modulus than the core layers formed of rubber.

Abstract: There is disclosed a composition which is layered in a reflective board to constitute a radio wave absorber. In this composition, an electroconductive titanium oxide is compounded with a substrate. With regard to the substrate, there may be used thermoplastic resin, thermosetting resin, rubber or elastomer.

Abstract: There is disclosed a composition which is layered on a reflective board to constitute a radio wave absorber. In this composition, an electroconductive titanium oxide is compounded with a substrate. With regard to the substrate, there may be used thermoplastic resin, thermosetting resin, rubber or elastomer.