Abstract: Provided is a semiconductor device comprising a semiconductor substrate provided with a drift region of a first conductivity type, wherein the substrate includes: an active portion; and a trench portion provided in the active portion at an upper surface of the substrate, the active portion includes: a first region in which trench portions including the trench portion are arrayed at a first trench interval in an array direction; and a second region in which trench portions including the trench portion are arrayed at a second trench interval greater than the first trench interval in the array direction, the first region includes a first bottom region of a second conductivity type provided over bottoms of at least two trench portions of the trench portions, and the second region includes a second bottom region of the second conductivity type provided at a bottom of one trench portion of the trench portions.

Abstract: A threaded joint wherein a relationship between shoulder angle parameters and thread taper angle parameters for a coupling and a pair of pins inserted from both ends of the coupling is defined by the following expression (1), and a tightening torque with which the threaded joint is tightened is 60% or more and 85% or less of a yield torque determined by the following expression (2): - 1.5 ? ° ? ? ? ? - ? ? ? ? 2. ° , ( 1 ) T = ( T S + T D ) ? 1 12 ( 2 ) T S = f t ? P c ? E 7 2 ? ( 2 ? ? ? E 7 ) ? L 4 ? 1 2 P c = E ? ? m 2 ? ( ( W 2 ) 2 - ( E 7 2 ) 2 ) ? ( ( E 7 2 ) 2 - ( d 2 ) 2 ) 2 ? ( E 7 2 ) 3 ? ( ( W 2 ) 2 - ( d 2 ) 2 ) T D = Y m ? A S ( P 2 ? ? + R t ? f s cos ? ? + R s ? f s ) .

Abstract: A tool for a piercing mill, the tool comprising a scale layer in a surface layer of a substrate steel, wherein the scale layer includes a net structure scale layer that is formed on a substrate steel side, has a thickness of 10 to 200 ?m in a depth direction, and is complicatedly intertwined with a metal; and wherein a microstructure on the substrate steel side in a range of at least 300 ?m in the depth direction from an interface between the net structure scale layer and the substrate steel contains a ferrite phase at an area fraction of 50% or more, the ferrite phase containing 400/mm2 or more ferrite grains having a maximum length of 1 to 60 ?m.

Abstract: A tool for a piercing mill with excellent wear resistance and a method for producing the tool for a piercing mill are provided. A scale layer is formed in a surface layer of a substrate steel having a composition containing, on a mass % basis, C: 0.05% to 0.5%, Si: 0.1% to 1.5%, Mn: 0.1% to 1.5%, Cr: 0.1% to 1.5%, Mo: 0.6% to 3.5%, W: 0.5% to 3.5%, and Nb: 0.1% to 1.0% and further containing Co: 0.5% to 3.5% and Ni: 0.5% to 4.0% so as to satisfy 1.0<Ni+Co<4.0. The scale layer includes a net structure scale layer that is formed on a substrate steel side, has a thickness of 10 to 200 ?m in a depth direction, and is complicatedly intertwined with a metal. A microstructure on the substrate steel side in a range of at least 300 ?m in the depth direction from an interface between the net structure scale layer and the substrate steel contains a ferrite phase at an area fraction of 50% or more, the ferrite phase containing 400/mm2 or more of ferrite grains having a maximum length of 1 to 60 ?m.

Abstract: Herein disclosed is an apparatus for transcoding a coded multiplexed sound and moving picture sequence comprises the rate converter, which is operated to compress only the video bit streams, which have extremely large information volume.

Abstract: Herein disclosed is an apparatus for transcoding a coded multiplexed sound and moving picture sequence comprises the rate converter, which is operated to compress only the video bit streams, which have extremely large information volume.

Abstract: An improvement is attained in a cable communication system of the type having communication line incorporated in the interior of a water supply hose which comprises, in combination, signal transmission cable incorporated extending in the interior of the water supply hose for the communication between a water injection nozzle and a fire-engine; a leading end coupling adapter for leading the signal transmission cable incorporated in the water supply hose to the outside for the connection to a communication exchange disposed on the part of the water injection nozzle for communication with the fire-engine and/or a transmitter for the control of the current amount of water to be supplied; and a communication exchange for mutual communication with the water injection nozzle and/or a water supply controller for the control of the current amount of water to be supplied to the nozzle disposed on the part of the fire engine to be connected operative to the signal transmission cable.

Abstract: The present invention relates to a coupling for fire hoses, wherein the fire hose is provided with a built-in communication cable. An inner cylinder is provided which is substantially identical for either the male or female unit. The inner cylinder includes a base end part fitted with a fire hose with a built-in communication cable. An annular sealing material is provided for insulating and water-proofing an opening end face of the inner cylinder, and provided with an annular conductor connected to the communication cable. An outer cylinder is provided which idly engages with an outer peripheral surface of the inner cylinder.