Abstract: A method for manufacturing a nitride semiconductor device includes the steps of growing a GaN channel layer on an SiC substrate using a vertical MOCVD furnace set at a first temperature using H2 as a carrier gas, and TMG and NH3 as raw materials, holding the SiC substrate having the grown GaN channel layer in the MOCVD furnace set at a second temperature higher than the first temperature using H2 as a carrier gas, the MOCVD furnace being supplied with NH3, and growing an InAlN layer on the GaN channel layer using the MOCVD furnace set at a third temperature lower than the first temperature using N2 as a carrier gas, and TMI, TMA, and NH3 as raw materials.

Abstract: First shaped item with shaft part is produced by forward extrusion forming of work, and further, upset forming thereof is carried out to thereby obtain second shaped item with large-diameter part. Subsequently, backward extrusion forming of the second shaped item is carried out to thereby obtain third shaped item having not only cup part provided with ball rolling grooves but also circular diameter expansion portion provided at the mouth area of the inside wall of the cup part along the circumferential direction in such a fashion that the diameter is gradually expanded from the bottom side toward the opening side. Outer ring member for constant-velocity joint is obtained by further subjecting the third shaped item to low-temperature annealing treatment, shot blast treatment and lubricating chemical coating treatment, and thereafter to ironing forming.

Abstract: Soldering flux compositions, solder pastes, and methods of soldering using the same are provided, that exhibit excellent wettability, give highly reliable solder joints, and have superior storage stability. The flux composition contains at least one compound having at least one blocked carboxyl group selected from the group including compound (X) obtained by reaction of a carboxylic acid compound and a vinyl ether compound, compound (Y) obtained by reaction of a carboxylic acid anhydride compound and a hydroxy vinyl ether compound, and compound (Z) obtained by reaction of an acid anhydride and a polyhydric alcohol, followed by addition polymerization with a divinyl ether compound, and the flux composition is non-curing.

Abstract: First shaped item with shaft part is produced by forward extrusion forming of work, and further, upset forming thereof is carried out to thereby obtain second shaped item with large-diameter part. Subsequently, backward extrusion forming of the second shaped item is carried out to thereby obtain third shaped item having not only cup part provided with ball rolling grooves but also circular diameter expansion portion provided at the mouth area of the inside wall of the cup part along the circumferential direction in such a fashion that the diameter is gradually expanded from the bottom side toward the opening side. Outer ring member for constant-velocity joint is obtained by further subjecting the third shaped item to low-temperature annealing treatment, shot blast treatment and lubricating chemical coating treatment, and thereafter to ironing forming.

Abstract: Soldering flux compositions, solder pastes, and methods of soldering using the same are provided, that exhibit excellent wettability, give highly reliable solder joints, and have superior storage stability. The flux composition contains at least one compound having at least one blocked carboxyl group selected from the group including compound (X) obtained by reaction of a carboxylic acid compound and a vinyl ether compound, compound (Y) obtained by reaction of a carboxylic acid anhydride compound and a hydroxy vinyl ether compound, and compound (Z) obtained by reaction of an acid anhydride and a polyhydric alcohol, followed by addition polymerization with a divinyl ether compound, and the flux composition is non-curing.

Abstract: A switching mechanism is configured such that a lower limb radiographic filter 11a is moved inside a radiation field of the X-rays that is an opening portion of an X-ray movable restriction only when radiographing a region of a subject from the groin to the toe, or the filter is moved outside the radiation field when radiographing the lumbar region of the subject. With this switching mechanism thus constituted, it is possible to lighten a burden on the operator, and realize the X-ray radiographic apparatus having high universality.

Abstract: A switching mechanism is configured such that a lower limb radiographic filter 11a is moved inside a radiation field of the X-rays that is an opening portion of an X-ray movable restriction only when radiographing a region of a subject from the groin to the toe, or the filter is moved outside the radiation field when radiographing the lumbar region of the subject. With this switching mechanism thus constituted, it is possible to lighten a burden on the operator, and realize the X-ray radiographic apparatus having high universality.

Abstract: A switching mechanism is configured such that a lower limb radiographic filter 11a is moved inside a radiation field of the X-rays that is an opening portion of an X-ray movable restriction only when radiographing a region of a subject from the groin to the toe, or the filter is moved outside the radiation field when radiographing the lumber region of the subject. With this switching mechanism thus constituted, it is possible to lighten a burden of the operator, and realize the X-ray radiographic apparatus having high universality.

Abstract: Soldering flux compositions, solder pastes, and methods of soldering using the same are provided, that exhibit excellent wettability, give highly reliable solder joints, and have superior storage stability. The flux composition contains at least one compound having at least one blocked carboxyl group selected from the group including compound (X) obtained by reaction of a carboxylic acid compound and a vinyl ether compound, compound (Y) obtained by reaction of a carboxylic acid anhydride compound and a hydroxy vinyl ether compound, and compound (Z) obtained by reaction of an acid anhydride and a polyhydric alcohol, followed by addition polymerization with a divinyl ether compound, and the flux composition is non-curing.

Abstract: A switching mechanism is configured such that a lower limb radiographic filter 11a is moved inside a radiation field of the X-rays that is an opening portion of an X-ray movable restriction only when radiographing a region of a subject from the groin to the toe, or the filter is moved outside the radiation field when radiographing the lumber region of the subject. With this switching mechanism thus constituted, it is possible to lighten a burden of the operator, and realize the X-ray radiographic apparatus having high universality.

Abstract: The inventive cement-based composition is useful as a coating material for corrosion-resistant protection on steel and iron surfaces. The composition is basically a polymer cement composition prepared by compounding a hydraulic cement with an aqueous emulsion of a polymeric constituent but characteritically the inventive composition is prepared by adding an aqueous emulsion of a hydrocarbon solvent such as kerosene containing a combination of surface active agents, i.e. oil-soluble non-ionic, water-soluble non-ionic and water-soluble cationic ones, and a saccharide compound such as glucose. By virtue of the unique formulation, the composition has a greatly extended pot-life suitable for coating works of, for example, steel rods and pipes by the dip coating method.