Abstract: A stator core, a stepper motor and a linear actuator allowing size reduction while maintaining a rotor diameter are provided. A stepper motor 1 comprises a rotor 20 and a stator 30, wherein the stator 30 comprises an A-phase magnetic pole part 33, a B-phase magnetic pole part 34 and a dummy magnetic pole part 38, all of which are disposed to be spaced apart from and opposing the outer circumferential surface of the rotor 20. The dummy magnetic pole part has no winding core part, and the A-phase magnetic pole part 33 and the B-phase magnetic pole part 34, which the stator 30 comprises, are disposed so that the A-phase magnetic pole part 33 and the B-phase magnetic pole part 34 are included within a minimum rectangular area R surrounding the rotor 20 when the stator 30 is viewed from a width direction X, i.e., a direction perpendicular to an axial direction P of the rotor 20.

Abstract: The present invention relates to cement reinforcing thermoplastic resin reinforcement that is free from uneven stretch, excellent in pullout resistance, highly effective in anchoring concrete, and shows evidence of an excellent reinforcing effect; and reinforced cement mixtures using such thermoplastic resin reinforcement, the cement reinforcing thermoplastic resin reinforcement being produced by means of cutting into pieces of a predetermined length filamentary bodies provided with numerous bulges at intervals in the longitudinal direction, the filamentary bodies being formed by uniaxially stretching long bodies made of thermoplastic resin and having numerous irregularities in the longitudinal direction.