Abstract: A prepreg containing at least the following components [A] to [D], wherein the prepreg includes: a first layer in which the component [A] is impregnated with a first resin composition containing the components [B] and [C]; and a second layer that contains a second resin composition containing the components [B] to [D] and is formed on both surfaces of the first layer, and the first layer and the second layer are adjacent to each other, an average fiber diameter of a carbon fiber as the component [A] is 6 ?m or more and 9 ?m or less, and a content of a bifunctional amine type epoxy resin [B1] is 15 parts by mass or more and less than 40 parts by mass based on 100 parts by mass of a total amount of epoxy resin of the component [B]: [A] a carbon fiber; [B] an epoxy resin; [C] a curing agent; and [D] thermoplastic resin particles.

Abstract: An imaging apparatus for focusing a light onto an image to generate an electric signal representing thus focused light image with a broader dynamic range includes an image pickup device, an image pickup device controller, and an accumulating charge selector. The image pickup device control controller controls an amount of electric charge that image pickup device can accumulate therein. The accumulating charge selector switches the image pickup deice to a first accumulative electric charge amount level and to a second accumulative electric charge amount level greater than said first accumulative electric charge amount level within said imaging period.

Abstract: A method of controlling the speed of a ship equipped with a controllable pitch propeller at a predetermined value. A desired horsepower corresponding to a desired ship speed is obtained in accordance with the actual horsepower, the detected ship speed value and the preset ship speed value, and the rpm of the main engine is controlled in accordance with the desired rpm obtained in accordance with an engine loading function generator for minimum fuel consumption obtained in accordance with predetermined engine loading function generator for optimum propeller efficiency and a designed load characteristic function and the desired horsepower. A desired fuel rack position is obtained in accordance with the desired rpm and the desired horsepower and the desired fuel rack position is compared with the actual fuel rack position so as to control the blade angle of the propeller.

Abstract: A rigid marine sail has a rigid left sail portion and a rigid right sail portion, both of which are pivotally secured to a mast on a ship so as to be pivotable about one common pivot axis which extends substantially parallel to the mast of the ship. The common pivot axis is spaced ahead of the mast with respect to the direction of intended movement of the ship. The left and right sail portions are foldable to an operable position by pivoting them about the common pivot axis and are also foldable to a streamlined folded inoperable position by being pivoted about the one common pivot axis, the left and right sail portions being substantially parallel to each other and closely facing each other when they are in their streamlined folded inoperable positions. A shroud is provided ahead of the common pivot axis with respect to the direction of movement of the ship. When the left and right sail portions are in their folded inoperable position, the shroud spans a gap between them to reduce air resistance.