Abstract: The object of the present invention is to provide a radar receiver that can steadily and reliably detect the target in the close zone without largely complicating the construction compared to the conventional radar apparatuses. The radar receiver according to the present invention comprises a receiving unit 15 that detects or modulates a received wave for detecting a target, the received wave arriving from the target in response to a transmitting wave transmitted towards the target, and a control unit 19 that sets a gain of the receiving unit 15 to a value at which the receiving unit is prevented from falling into a saturation region by a component of the transmission wave that wraps around the receiving unit 15 through an aerial system used for transmission of the transmission wave during a period in which the transmission wave is being transmitted.

Abstract: A hair dye composition containing an organic compound having not more than 4 carbon atoms, which has both of a —SH group and a —NH2 group and does not have a —COOH group, and also containing at least one member selected from aromatic compounds in which given substituents are each attached to meta positions of a mononuclear benzene ring structure and ?-naphthol as a coupler of an oxidation dye intermediate, in which the blending amount of each member as the coupler is in a range from 0.01 to 0.5% by mass. An oxidation hair dye composition containing the hair dye composition. Wherein the hair dye composition and the oxidation hair dye composition are capable of preventing a change in the color tone of the hair dyeing even during long-term storage are provided.

Abstract: A hair dye composition containing an organic compound having not more than 4 carbon atoms, which has both of a —SH group and a —NH2 group and does not have a —COOH group, and also containing at least one member selected from aromatic compounds in which given substituents are each attached to meta positions of a mononuclear benzene ring structure and ?-naphthol as a coupler of an oxidation dye intermediate, in which the blending amount of each member as the coupler is in a range from 0.01 to 0.5% by mass. An oxidation hair dye composition containing the hair dye composition. According to these inventions, the hair dye composition and the oxidation hair dye composition capable of preventing a change in the color tone of hair dyeing even during long-term storage are provided.