Abstract: A fingertip pulse wave sensor includes a fingertip cushion supporting member having a fingertip cushion supporting surface, and a nail supporting member having a nail supporting surface which is disposed in opposed relationship with the fingertip cushion supporting surface at an interval smaller than the standard thickness of fingertips. Either of the fingertip cushion supporting member of the nail supporting member is fixed, and the other of the fingertip cushion supporting member and the nail supporting member is hinged. The hinged fingertip cushion supporting member or nail supporting member is urged in the direction in which they are moved to each other by an elastic body which is capable of applying a substantially fixed amount of pressure with respect to the variations in the pivot stroke caused by the variations in the thickness of the fingertips resting on the fingertip cushion supporting member.

Abstract: A fingertip pulse wave sensor includes a fingertip cushion supporting member having a fingertip cushion supporting surface, and a nail supporting member having a nail supporting surface which is disposed in opposed relationship with the fingertip cushion supporting surface at an interval smaller than the standard thickness of fingertips. Either of the fingertip cushion supporting member of the nail supporting member is fixed, and the other of the fingertip cushion supporting member and the nail supporting member is hinged. The hinged fingertip cushion supporting member or nail supporting member is urged in the direction in which they are moved to each other by an elastic body which is capable of applying a substantially fixed amount of pressure with respect to the variations in the pivot stroke caused by the variations in the thickness of the fingertips resting on the fingertip cushion supporting member.

Abstract: A fingertip pulse wave sensor includes a fingertip supporting base having either a nail supporting surface or a fingertip cushion supporting surface, and a slider having the other of the nail supporting surface and the fingertip cushion supporting surface. The slider is guided on the fingertip supporting base in such a manner as to be slidable in the direction in which it is moved away from or toward the fingertip supporting base. The slider is urged in the direction in which it is moved toward the fingertip supporting base by an elastic body which is capable of applying a substantially fixed amount of pressure with respect to the variations in the slide stroke in the direction in which the slider is moved away from the fingertip supporting base which occur when different fingertips are set.

Abstract: A process for manufacturing concrete articles of improved initial strength and long-term strength from a hydraulic cement composition capable of forming predominantly tobermorite group crystalline calcium silicate hydrate is provided. The hydraulic cement composition, having incorporated therein specified amounts of alumina cement and calcium hydroxide and/or oxide, is initially set in a mold and after the concrete so formed is allowed to stand at a temperature of not higher than approximately 40.degree. C for a period of 2 hours to 5 days, the concrete is finally cured at an elevated temperature and pressure.

Abstract: Light-weight foamed concrete articles are advantageously manufactured in a continuous manner from a rapid setting hydraulic cement composition. The cement composition in the form of a dry powder and an aqueous foamed liquid containing a foaming agent and a setting retarder are separately and continuously introduced into a continuously stirred vessel where they are mixed into an aqueous foamed cement slurry within a short period of time. The foamed cement slurry is cast into the desired shape and, if desired, cured.