Abstract: The difference between a revolution period of larger diameter-side balls and a revolution period of smaller diameter-side balls is smaller as compared with a conventional bearing. The relation, (??10)??<?, is established, where ?(°) represents a contact angle of the larger diameter-side ball, and ?(°) represents a contact angle of the smaller diameter-side ball.

Abstract: The difference between a revolution period of larger diameter-side balls and a revolution period of smaller diameter-side balls is smaller as compared with a conventional bearing. The relation, (??10)??<?, is established, where ?(°) represents a contact angle of the larger diameter-side ball, and ?(°) represents a contact angle of the smaller diameter-side ball.

Abstract: An antenna system is provided with an antenna panel 1 which has fine bumps and dips 4 formed on a mirror surface side, which is one of surfaces opposing to each other, by etching, wherein the fine bumps and dips scatter sunlight entering the mirror surface side of the antenna panel 1 to suppress the collection of the sunlight and regularly reflect radio waves having longer wavelength than the sunlight entering the mirror surface side of the antenna panel.

Abstract: An antenna system is provided with an antenna panel 1 which has fine bumps and dips 4 formed on a mirror surface side, which is one of surfaces opposing to each other, by etching, wherein the fine bumps and dips scatter sunlight entering the mirror surface side of the antenna panel 1 to suppress the collection of the sunlight and regularly reflect radio waves having longer wavelength than the sunlight entering the mirror surface side of the antenna panel.

Abstract: According to an aspect of the present invention, an antenna system comprises: an antenna panel (1) which has fine irregularities (4) on front and back surfaces thereof, the fine irregularities (4) being formed by blasting so as to regularly reflect service radio waves having longer wavelength than sunlight and scatter sunlight. Further, according to another aspect of the present invention, a method for manufacturing an antenna system in which an antenna panel (1) is manufactured by combining a plurality of constituent parts, comprises the steps of: finishing front and back surface portions of each of the constituent parts so as to thin down the thickness of constituent parts; blasting the front and back surface portions of the constituent parts with abrasive grains; combining the plurality of constituent parts subjected to the blasting step so as to form the antenna panel (1) into a desired shape; and attaching an assistant reflecting mirror (3) to the antenna panel (1) acting as a main reflecting mirror.

Abstract: According to an aspect of the present invention, an antenna system comprises: an antenna panel (1) which has fine irregularities (4) on front and back surfaces thereof, the fine irregularities (4) being formed by blasting so as to regularly reflect service radio waves having longer wavelength than sunlight and scatter sunlight. Further, according to another aspect of the present invention, a method for manufacturing an antenna system in which an antenna panel (1) is manufactured by combining a plurality of constituent parts, comprises the steps of: finishing front and back surface portions of each of the constituent parts so as to thin down the thickness of constituent parts; blasting the front and back surface portions of the constituent parts with abrasive grains; combining the plurality of constituent parts subjected to the blasting step so as to form the antenna panel (1) into a desired shape; and attaching an assistant reflecting mirror (3) to the antenna panel (1) acting as a main reflecting mirror.

Abstract: An agent for inducing flower bud formation in plants comprising an unsaturated fatty acid having an oxo group and a hydroxy group, a hydroperoxy group, or an oxo group, a hydroxy group, and a hydroperoxy group; a method for preparing said agent for inducing flower bud formation; and, a method for inducing flower bud formation using said agent for inducing flower bud formation are provided.

Abstract: The present invention relates to a bonded assembly characterized in that a board having a convexed portion on a jointing surface thereof and a board having, on a jointing surface thereof, a concaved portion or a through hole to be engaged with the convexed portion are jointed with adhesives. Also, the present invention relates to a bonded assembly characterized in that an adhesive is coated on the portion other than the convexed portion of the board so that the coating thickness is smaller than the height of the convexed portion, and then the board is jointed to another board having a concaved portion or a through hole, after making alignment of the boards. Further, the present invention relates to a rivet having means for fitting to and temporarily fixing to an inserting through hole, and a method of jointing boards which comprises a step for inserting, fitting and temporarily fixing the rivet having the means for temporarily fixing to the inserting through hole on the board.

Abstract: An agent for inducing flower bud formation in plants comprising an unsaturated fatty acid having an oxo group and a hydroxy group, a hydroperoxy group, or an oxo group, a hydroxy group, and a hydroperoxy group; a method for preparing said agent for inducing flower bud formation; and, a method for inducing flower bud formation using said agent for inducing flower bud formation are provided.

Abstract: The present invention relates to a bonded assembly characterized in that a board having a convexed portion on a jointing surface thereof and a board having, on a jointing surface thereof, a concaved portion or a through hole to be engaged with the convexed portion are jointed with adhesives. Also, the present invention relates to a bonded assembly characterized in that an adhesive is coated on the portion other than the convexed portion of the board so that the coating thickness is smaller than the height of the convexed portion, and then the board is jointed to another board having a concaved portion or a through hole, after making alignment of the boards. Further, the present invention relates to a rivet having means for fitting to and temporarily fixing to an inserting through hole, and a method of jointing boards which comprises a step for inserting, fitting and temporarily fixing the rivet having the means for temporarily fixing to the inserting through hole on the board.