Abstract: An apparatus and method for measuring air currents on the surface of a substrate, which can accurately measure the magnitude and direction of air currents on the surface of a wafer with wafer-type air current measurement sensors, are provided. The apparatus includes: a first air current measurement module measuring a magnitude of air currents on a surface of a first substrate, which is processed in accordance with a semiconductor manufacturing process; a second air current measurement module measuring a movement direction of the air currents; and a power module supplying power to the first and second air current measurement modules, wherein the first air current measurement module, the second air current measurement module, and the power module are mounted on a second substrate, which has the same shape as the first substrate.

Abstract: Provided is a testing apparatus for an active current control-type non-contact superconductive exciter having a hybrid magnet installed therein, and a high-temperature superconductive rotating machine using same. Provided is principally characterized by having a hybrid magnet, in a module form, in which a permanent magnet, a DC electromagnet and an AC electromagnet are used together, wherein the hybrid magnet is set in a plurality along the circumferential direction of a ring-shaped iron stator, is formed to correspond to the outer side of a rotor, having a high-temperature superconductive tape (or a second-generation high-temperature superconductive wire), of a non-contact superconductive exciter, and thus enables a selected operation (charging, discharging and the like) before and after rotation of a driving motor.

Abstract: In a method for controlling an operation of a sphere type shifting apparatus, and according to an exemplary embodiment of the present disclosure, it is possible to prevent a sphere mechanism from being separated from a rotation completion location upon rotation operation of the sphere mechanism including a shifting unit provided on a hemispherical one side thereof and a design unit provided on a hemispherical other side thereof, preventing occurrence of clearance of the sphere mechanism, and to terminate an operation of a motor as necessary when the sphere mechanism cannot reach the rotation completion location due to sticking thereof or foreign substances stuck thereto upon rotation operation of the sphere mechanism, preventing damage to parts.