Abstract: A mining riser pipe is extended from above water toward a water bottom containing water bottom resources, and a lower portion of an insertion pipe connected to a lower portion of the mining riser pipe is inserted into the water bottom. A liquid is supplied into the insertion pipe and a rotation shaft extends axially inside both of pipes is rotated to rotate stirring blades attached to a lower portion of the rotation shaft inside the insertion pipe, thereby drilling and dissolving mud S inside the insertion pipe into a slurry form is raised to an upper portion of the insertion pipe by a stirring flow generated by the rotation of the stirring blades, and the raised mud is lifted above the water through the mining riser pipe by lifting force.

Abstract: Provided is a sensor-device attachment structure including: a thin portion that is thinner than other parts of a member; a flexible board; an at least one sensor device installed to the flexible board; a spacer that is formed into a shape of a film having a uniform thickness, that is sandwiched between the thin portion and the flexible board, and that includes a through portion which is formed through the spacer in a thickness direction of the spacer at a position corresponding to the at least one sensor device; and an adhesive that is charged in the through portion, and that bonds the thin portion and the flexible board to each other.

Abstract: Provided is a sensor-device attachment structure including: a thin portion that is thinner than other parts of a member; a flexible board; an at least one sensor device installed to the flexible board; a spacer that is formed into a shape of a film having a uniform thickness, that is sandwiched between the thin portion and the flexible board, and that includes a through portion which is formed through the spacer in a thickness direction of the spacer at a position corresponding to the at least one sensor device; and an adhesive that is charged in the through portion, and that bonds the thin portion and the flexible board to each other.

Abstract: To provide a decorative member that has a small transmission loss of a millimeter wave and excellent metallic luster. The decorative member includes a base material made of a synthetic resin and a film body that made of an agglomeration of inorganic fine particles having at least a metal surface. An attenuation rate when a millimeter wave having a frequency of 18 to 300 GHz transmits is 0.001 to 2 dB, and an L* value (brightness) is 45 to 95.

Abstract: A strain gauge has a mounting structure for use in mounting the strain gauge on a portion being measured in an object being measured. The strain gauge includes: a base member in a film form; a resistance element provided on the base member; a first wiring line provided on the base member and connected to the resistance element; a terminal provided on the base member and connected to the first wiring line; and a second wiring line connected to the terminal. The base member includes a first base portion on which the resistance element is provided and a second base portion on which the terminal is provided. The first base portion is configured to be adhered to the portion being measured, while the second base portion is configured not to be adhered to the portion being measured.

Abstract: A bismuth compound which is little toxic, insoluble in a monomer, usable for optical purpose and used as a substitute for a lead compound, in which a phosphoric acid ester having a (meth)acrylic group(s) is bonded to bismuth, and a method of producing the bismuth compound by reacting bismuth (meth)acrylate or bismuth subsalicylate with a phosphoric acid ester having a (meth)acrylic group(s) and carrying out dehydration.

Abstract: To provide a decorative member that has a small transmission loss of a millimeter wave and excellent metallic luster. The decorative member includes a base material made of a synthetic resin and a film body that made of an agglomeration of inorganic fine particles having at least a metal surface. An attenuation rate when a millimeter wave having a frequency of 18 to 300 GHz transmits is 0.001 to 2 dB, and an L* value (brightness) is 45 to 95.

Abstract: A bismuth compound which is little toxic, insoluble in a monomer, usable for optical purpose and used as a substitute for a lead compound, in which a phosphoric acid ester having a (meth)acrylic group(s) is bonded to bismuth, and a method of producing the bismuth compound by reacting bismuth (meth)acrylate or bismuth subsalicylate with a phosphoric acid ester having a (meth)acrylic group(s) and carrying out dehydration.