A hemodialysis device includes a hemodialysis device main body including an arterial blood circuit, venous blood circuit, blood pump, dialyzer, dialysate inlet and outlet lines, voltage adding means, electric potential measuring means, and monitoring means monitoring the needle when it is detached from the patient based on an electric potential measured by the electric potential measuring means. An organic electroluminescence device which comprises at least one organic thin film layer including a light emitting layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein at least one of the organic thin film layer comprises the anthracene derivative. Light weight translucent or transparent polymeric panels are provided having substantially frameless side and bottom edges. The communication device comprises a control unit for dynamically controlling the filtering characteristics of the MSP and SSP-filters based on one or more control input signals. The structure, in which a Bragg diffraction grating is formed in such protruding part of the optical fiber on said mounting surface, can prevent the occurrence of a change in reflective characteristic of the Bragg diffraction grating. With this configuration, it is possible to enhance the capability of heat radiation from the rotary electric machine and to enhance the design freedom of component parts around the stator and the rotor.