Abstract: PROBLEM TO BE SOLVED: To provide a highly reliable data transaction systems with a distributed network, and a highly reliable data transaction method. MEANS TO SOLVE THE PROBLEM: A highly reliable data transaction system with a distributed network has an authentication means for authenticating a health check institution, a first acquisition means for acquiring health check information of an examinee, a highly reliable data generation means for generating highly reliable data related to the examinee, a first recording means for recording the generated highly reliable data in blocks connected by a blockchain built in the distributed network, and a first delivery means for delivering part or all of the highly reliable data to the user, depending on the transaction information.

Abstract: A portable refractometer is provided that includes a lens barrel having a lens barrel axis. A prism is secured to one end of the lens barrel, the prism having an entry face that provides a boundary surface between the prism and a substance to be measured. A tube shaped optical chassis is inside the lens barrel, and is rotatably supported about a predetermined rotational axis perpendicular to the lens barrel axis. An objective lens is arranged in the optical chassis, and is positioned in relation to the optical chassis. An optical scale is arranged inside the optical chassis, at the focal point of the objective lens. A mover moves the objective lens relatively in relation to the optical scale in response to changes in temperature by turning the optical chassis about the rotational axis.

Abstract: A portable refractometer is provided that includes a lens barrel having a lens barrel axis. A prism is secured to one end of the lens barrel, the prism having an entry face that provides a boundary surface between the prism and a substance to be measured. A tube shaped optical chassis is inside the lens barrel, and is rotatably supported about a predetermined rotational axis perpendicular to the lens barrel axis. An objective lens is arranged in the optical chassis, and is positioned in relation to the optical chassis. An optical scale is arranged inside the optical chassis, at the focal point of the objective lens. A mover moves the objective lens relatively in relation to the optical scale in response to changes in temperature by turning the optical chassis about the rotational axis.

Abstract: A hanger for hanging a product such as a video cassette for display is disclosed. The hanger is in a form of a flat plate, and comprises a bonding section capable of bonding to a product to be hanged, and a folding section having a hanging means such as a hole and is formed integral with the bonding section. The folding section is capable of turning upward by a predetermined angle with respect to its original state in which the bonding section and the folding section are substantially in the same plane. The hanger can be automatically bonded to the product and does not interfere with the automatic packaging of a number of products into a box due to its flat structure. The folding section is folded upward when the product to be displayed and is hanged by the hanging means on a displaying place.