Abstract: A sole includes a midsole, and the midsole includes a toe support portion, a midfoot support portion, and an intervening portion. The sole includes a toe contact surface and a midfoot contact surface. The intervening portion has a recessed portion having a shape recessed from an imaginary curved surface toward a side of a wearer's foot. A length between the imaginary curved surface and the recessed portion is greater than or equal to 13% and less than or equal to 50% of a thickness of a portion of the intervening portion where the recessed portion is provided. The midsole has a front side region surrounded by a front line and a rear line, and an area of the recessed portion in plan view is greater than or equal to 35% and less than or equal to 50% of an area of the front side region in plan view.

Abstract: A PCB that can transmit a high frequency signal of a GHz band with a low loss includes an insulator and magnetic nanoparticles dispersed in the insulator.

Abstract: A PCB that can transmit a high frequency signal of a GHz band with a low loss includes an insulator and magnetic nanoparticles dispersed in the insulator.

Abstract: A perpendicular magnetic recording medium having a magnetic layer comprised of a metal magnetic thin film on a nonmagnetic support. The half-value width of the switching field distribution obtained from a remanent magnetization curve in the intrinsic easy direction of magnetization (axis of easy magnetization from which shape magnetic anistrophy is removed) of the magnetic layer is no more than 40 kA/m.Rectangular wave signals are recorded or reproduced on or from a Co--O type perpendicular magnetic recording medium with a direction .theta..sub.E of the axis of easy magnetization tilted in a range of 10.degree. to 45.degree. from the direction perpendicular to the plane of the film of the magnetic layer using a ring type magnetic head with a gap length Lg of not more than 0.18 .mu.m.