Abstract: A rotor blade (1) comprises a main blade (2) having a substantially fixed chord length (C), a front tip blade (3) having a chord length (C1) smaller than that of the main blade and connected to the main blade so that a front edge (3a) thereof is continuous with a front leading edge (2a) of the main blade, and a rear tip blade (4) having a chord length (C2) greater than that of the front tip blade and connected to the main blade so that a trailing edge thereof is continuous with a trailing edge of the main blade. The blade incidence angle (&thgr;1, &thgr;2), the washout angle (&dgr;1, &dgr;2) and so on of at least either the front tip blade or the rear tip blade, the respective lengths (R1, R2) of the front tip blade (3) and the rear tip blade (4), and the anhedral angle (&eegr;) of the rear tip blade (4) are determined so that tip vortices generated by the front tip blade (3) and the rear tip blade (4) cancel each other to suppress BVI noise.

Abstract: A medical composition for oral administration is formulated into a jellied form preferably using a base containing carrageenan, locust bean gum, and polyacrylic acid or a partly neutralized product or salt thereof. The jellied medical composition for oral administration is contained in a disposable container made of a synthetic resin and composed of a shell being deformable under forcing and capable of containing the composition therein, a ring neck with a small diameter connected to the shell, and a handle serving as the closed end of the neck and connected to the neck in a breakable manner, wherein the neck is opened to provide a spout for pouring the composition when the handle is broken away from the neck.

Abstract: A process for selectively hydrogenating benzene in a hydrocarbon oil is disclosed. The process comprises reacting the hydrocarbon oil with hydrogen gas in the presence of a hydrogenation catalyst comprising at least one metal in Group VIII of the Periodic Table and an alkaline aqueous layer which contains zinc or a zinc compound. Benzene in hydrocarbon oils can be selectively converted into cyclohexane by the process, while suppressing the hydrogenation reaction of alkyl aromatic compounds which are important high octane materials for gasoline.

Abstract: A semiconductor light emitting element in which light leakage from the vicinity of an active layer end thereof is significantly reduced, and an interval at which the element is disposed is sufficiently narrow, so that there can be realized an optimal distance-measuring accuracy when used for a light source of a camera's automatic focusing mechanism.

Abstract: A process for preparing 5-aminolevulinic acid or a salt thereof, which comprises reacting furfurylamine, of which the amino group has been protected, with oxygen molecule under irradiation by light in the presence of a sensitizer; hydrogenating the resulting compound in the presence of a metallic catalyst; and hydrolyzing the hydrogenated compound. 5-Aminolevulinic acid, useful as a raw material for various chemicals and as an agricultural chemical, can be prepared at a high yield by a simple procedure from a raw material which is inexpensive and readily available.

Abstract: A method for detecting the quality of a semiconductor device using a static current that flows in a state wherein internal elements are fixed, the semiconductor device has internal elements, such as MISFETs and complementary MISFETs in particular. By using a pattern group that controls the state of nodes of the internal elements or ON/OFF and other states of MISFETs that comprise the internal elements, as a test pattern group used for this inspection, faults involving long range reliability in addition to degenerate faults and those faults detected using conventional fault simulation may be detected. In the inspection method based on static current, observability of faults at output terminals need not be taken into consideration, so that the number of patterns in the test pattern group used for inspection may be less and may be easily created.

Abstract: A fault inspection system for the rotary machine is disclosed in which the rotational speed or a physical quantity related thereto of the rotary machine drive with changing rotational speeds is detected as a first detection signal, and the sound pressure or mechanical vibration from the rotary machine as a second signal. A reference line representing the relationship between the values of the first and second detection signals is determined on the basis of the same values. A fault of the rotary machine is detected on the basis of a third detection signal associated with an area corresponding to the region where the first or second detection signal exceeds the reference line.

Abstract: A colored article comprises a workpiece having a surface producing a color by light interference. The surface is defined by forming a reflective surface and coating the reflective surface with a composite layer of SiC and SiO.sub.2 having an SiO.sub.2 ingredient ratio of 5 to 80% by weight and a thickness of 200 to 3000 .ANG. or with a composite layer of Si.sub.3 N.sub.4 and SiO.sub.2 having an SiO.sub.2 ingredient ratio of 5 to 80% by weight and a thickness of 400 to 4000 .ANG..

Abstract: This invention relates to a thermal head suitable for constituting a multithermal head used in a color printer, a method of manufacturing the same, and a multithermal head constituted by the thermal heads. The thermal head comprises a flexible insulating film having heating elements arranged in a predetermined pattern and lead wires which have one ends electrically connected to the elements, the film being fixed on a substrate, and heating element driver ICs mounted on the substrate and electrically connected to the wires on the film. The method comprises the steps of, coating the film on the plate, forming the elements in a predetermined pattern and the wires on the film, dividing the plate into portions in accordance with a change in level of a surface of the substrate to which the film is to be fixed, fixing the divided portions of the plate on the substrate, and locating the ICs at a position lower than that of the elements on the substrate and connecting the other ends of the wires to the ICs.

Abstract: A centrifugal casting device adapted to mold and cast a casting material melted by a casting material melting means, by the centrifugal force of a rotary arm, in a mold disposed on the centrifugal side of the arm through a casting crucible disposed at one end of the arm, in which device the melting means is designed to move outside the path of rotation of the arm at least when the arm is rotated so as to reduce the force of rotation of the arm to thereby increase efficiency of casting. And also a centrifugal casting device having the above features in which device the righting reaction of a charged compression spring is used as the driving force of the rotary arm and further included a clutch member and sensors so that the rotary arm stops as soon as possible at the end of casting and returns automatically to its normal position after stopping so as to be ready for the next step of casting and so as to automatically keep the force of rotation of the arm invariably constant.

Abstract: This invention relates to a thermal head suitable for constituting a multithermal head used in a color printer, a method of manufacturing the same, and a multithermal head constituted by the thermal heads. The thermal head comprises a flexible insulating film having heating elements arranged in a predetermined pattern and lead wires which have one end electrically connected to the elements, the film being fixed on a substrate, and heating element driver ICs mounted on the substrate and electrically connected to the wires on the film. The method comprises the steps of, coating the film on the plate, forming the elements in a predetermined pattern and the wires on the film, dividing the plate into portions in accordance with a change in level of a surface of the substrate to which the film is to be fixed, fixing the divided portions of the plate on the substrate, and locating the ICs at a position lower than that of the elements on the substrate and connecting the other ends of the wires to the ICs.

Abstract: A liquid fuel cell having a circulation system for a fuel mixture comprising fuel and water, which comprises a first tank containing water or a water-rich fuel mixture comprising water and fuel, a second tank containing fuel or a fuel-rich mixture comprising water and fuel, a first detector for detecting the liquid level of the fuel mixture in the circulation system, a second detector for detecting a fuel concentration of the fuel mixture in the circulation system, or an output from the fuel cell, or a load current of the fuel cell, a valve means for controlling flow of the water or the water-rich mixture in the first tank to the circulation system in accordance with the output from the first detector, and a valve means for controlling flow of the fuel or the fuel-rich mixture in the second tank to the circulation system in accordance with the output from the second detector, can be stably and efficiently operated for a prolonged time in spite of different consumption rates of fuel and water even if the load

Abstract: The disclosure is concerned with a fuel cell battery of an acidic electrolyte type, which comprises means for controlling the flow rate of an oxygen-containing gas, such as air, to be fed to an oxidant electrode of the fuel cell battery in a quantity to completely remove water that is formed on the oxidant electrode by the reaction between fuel and the oxidant from the oxidant electrode. The fuel cell battery prevents lowering of the battery performance due to accumulated water on the oxidant electrode. Also disclosed is means for removing the gas formed at the fuel electrode of the fuel cell from the fuel chamber.

Abstract: A melting and pressure casting device characterized in that it comprises a cylindrical electric heating means set in a closed chamber reducible and increasable in gas pressure, a vertically long crucible set in the heating means, a mold provided below the crucible and connected thereto, and an upper sprue communicating between the lower portion of the pouring cup and the sprue formed in the mold, wherein the melt for casting is held by its surface tension in the pouring cup and the melt thus held is poured under pressure by pressurizing the chamber into the mold through the upper sprue to thereby make a casting.

Abstract: A fuel cell made up of a pile of unit cells, each consisting of a pair of cell element and separator packed in a cell frame, in which there are formed a fuel feed path and oxide product evacuation path in the piling direction. The cell frame is provided between its inner edge offsets and the outer edges of the cell element and separator with inner packings, and further provided near its outer edge on one side with an outer packing. The sealing structure perfectly prevents a fuel leak, and yet allows compactness and easy assembling process.

Abstract: In a liquid fuel cell including a plurality of series-connected unit cells each including a fuel electrode and an oxidizer electrode disposed opposite to each other with an electrolyte layer being interposed therebetween, a fuel chamber disposed adjacent to the fuel electrode, and an oxidizer chamber disposed adjacent to the oxidizer electrode, and fuel tanks supplying liquid fuel to the fuel chambers, at least two vertically-spaced passages permitting communication of the fuel tanks with all of the fuel chambers are provided so that one of them serves as a passage for liquid fuel while the other serves as a passage for gas produced at the fuel electrodes, the liquid fuel in an amount smaller than the tank volume is charged in each of the fuel tanks to leave a non-charged space, and gas vent ports provided with gas-liquid separating means are disposed midway of the passages and/or on the tank wall portions corresponding to the non-charged spaces defined in the fuel tanks.

Abstract: Disclosed is a fuel cell using as an electrolyte an organic, high-molecular weight electrolyte. The fuel cell of the present invention can prevent the leakage of an electrolyte from an electrolyte chamber so that an electrical short-circuit between an anode and a cathode can be avoided. Moreover, use of the disclosed electrolytes permits the fuel to be fed to the fuel chamber by itself or in admixture with water, but without being mixed with electrolyte.