Abstract: When the density (DO) of the inclusions whose major axis exceeds 5 ?m observed in the axis position of a section perpendicular to the axial direction of a forged product is made 70 nos/cm2 or below and the radius of the forged product is made R, the ratio of the density (DR) of the inclusions whose major axis exceeds 5 ?m observed in the R/3 position from the axis position toward the radial direction and the density DO satisfies an inequality (1) below. 0.5?DR/DO?1.

Abstract: An object of the present invention is to provide an activated blood coagulation factor X (FXa) inhibitor that reduces the risk of bleeding caused by the treatment of thromboembolism. The present invention provides an oral anticoagulant agent comprising a compound represented by the following formula (1): or a pharmacologically acceptable salt thereof, or a hydrate thereof, as an active ingredient, wherein (A) a factor involved in the risk of bleeding caused by the anticoagulant agent is selected as a dose determinant; (B) a reference value of the dose determinant is set; (C) the dose determinant of a patient in need of administration is measured; and (D) the dose of the anticoagulant agent is selected with the reference value as an index.

Abstract: When the density (DO) of the inclusions whose major axis exceeds 5 ?m observed in the axis position of a section perpendicular to the axial direction of a forged product is made 70 nos/cm2 or below and the radius of the forged product is made R, the ratio of the density (DR) of the inclusions whose major axis exceeds 5 ?m observed in the R/3 position from the axis position toward the radial direction and the density DO satisfies an inequality (1) below. 0.5?DR/DO?1.

Abstract: Disclosed is a forging steel characterized in that prescribed composition of components must be satisfied. In particular, any one of the below-mentioned (I)-(IV) need be complied with in regard to dissolved Ca and dissolved Mg. (I) Dissolved Ca: 2-500 ppb (meaning “mass ppb” hereafter) and dissolved Mg: 0.04-5 ppm (meaning “mass ppm” hereafter); (II) Dissolved Ca: 2-100 ppb and dissolved Mg: 5-ppm; (III) Dissolved Ca: 2 ppb or less (0% not included) and dissolved Mg: 0.04-5 ppm; (IV) Dissolved Ca: 2-500 ppb and dissolved Mg: 0.04 ppm or less (0% not included).

Abstract: An optical disk stores the error management information indicating error areas, which are found in manufacturing an optical disk and in recording information, and the error management information further indicating areas used as substitutions of the error areas. An optical disk apparatus reads out of the optical disk the error management information indicating the in-manufacturing and in-recording error areas and the substitution areas, and stores the readout information into a memory buffer. A controller of the optical disk apparatus checks whether an area to be accessed in recording or reproducing the information into and from the optical disk is the error area or not by referring the error management information in the buffer memory.

Abstract: A data demodulation apparatus comprises an optical head for reading out code data from a recording medium, the code data having been modulated according to the timing of a clock pulse of a predetermined frequency and recorded in the recording medium, a reproduction pulse generating PLL circuit supplied with the clock pulse and the code data, and for generating a reproduction pulse synchronized in phase and frequency with the clock pulse in a first mode, and a reproduction pulse synchronized in phase with the code data in a second mode, and means for demodulating the code data according to the timing of the reproduction pulse. The frequency of the reproduction pulse is detected by a detector circuit. The frequency of the reproduction pulse is compared with that of the clock pulse. When a difference between both frequencies is within a tolerable range, the PLL circuit is set in the second mode. When a difference between both frequencies is not within the tolerable range, it is set in the first mode.