Hitachi, Ltd.

Sumitomo Metal Industries, Inc.

Nikon Corporation

Nippon Steel Sumitomo Metal Corporation

Kabushiki Kaisha Toshiba

Vallourec Oil and Gas France

Hitachi Powdered Metals Co., Ltd.

Showa Denko K.k.

Fujitsu General Limited

Resonac Corporation

Nippon Steel Corporation

Amp LLC

Keiichi Nakamura

Masaaki Sugino

Suguru Yamaguchi

Yuji Arai

Tadashi Iizuka

Hideaki Shimada

Yusaku Nakagawa

Yasuo Kamitsuma

Nobuyuki Mori

Takefumi Inagaki

Mitsuo Chigasaki

Masakatsu Ueda

Michihiko Iwamoto

Mutsumi Tanida

Hiroshi Asao

Motonobu Furukawa

Bertrand Maillon

Yuki Miura

Kenichi Okada

Makoto Saito

Kunio Kondo

Tomohiko Omura

Keiichi Kondo

Hisashi Amaya

Eric Verger

Takanori Aoki

Hideo Shikata

Masaki Yamano

Izumi Ochiai

Hiroki Kamitani

Hideki Takabe

Mitsuru Shiraishi

Claire Patureau

Tsuyoshi Kagaya

Daly Daly

Makoto Araki

Akira Shimada

Hiroki Tomoda

Kooichi Inaba

Masaki Fujino

Shuji Takeda

Masashi Katayama

Masaki Minabe

Sylvain Beigneux

Jyunya Tanaka

Makoto Sakamoto

Yosuke Takeda

Masayuki Tobo

Takahiro Kushida

Shoichi Nakashima

Takehisa Yoshikawa

Taro Ohe

Toyohiro Akebi

Takashi Ueda

Kenta Sakai

Toshiharu Abe

Taro Oe

Shunji Sasaki

Takahiro Hamamoto

Yoichi Wakabayashi

Takashi Tani

Takenori Kuramoto

Ikuji Hoshino

Jun Masubuchi

Kazuyo Kushida, Legal Representative

Tomoki Mori

Tsutomu Oshima

Yuji Hashimoto

Takao Kuranishi

Yoshihiro Kobayashi

Takashi Okada

Masaru Kunikata

Yoshiro Maita

Hikaru Kiga

Gabriel Briquet

Noriharu Kurokawa

Toshihiko Kitai

The steel material according to the present disclosure consists of, in mass %, C: 0.15 to 0.45%, Si: 0.05 to 1.00%, Mn: 0.05 to less than 0.80%, P: 0.030% or less, S: 0.0100% or less, Al: 0.100% or less, Cr: 0.30 to 1.50%, Mo: 0.25 to 2.00%, Ti: 0.001 to 0.015%, N: 0.0100% or less, O: 0.0050% or less, V: 0 to 0.05%, Nb: 0 to 0.010%, B: 0 to less than 0.0005%, Ca: 0 to 0.0100%, Mg: 0 to 0.0100%, and rare earth metal: 0 to 0.0100%, with the balance being Fe and impurities. In the steel material, the grain size number of prior-austenite grains is less than 7.0, Formula (1) to Formula (4) described in the specification are satisfied, the yield strength is 896 MPa or more, and the absorbed energy at −10° C. is 95 J or more.

Steel material

Provided is a method for producing purified chloroprene-based-polymer latex which enables efficiently removing a residual volatile organic substance from chloroprene-based-polymer latex while suppressing foaming and the deposition of aggregates. The method for producing purified chloroprene-based-polymer latex of the present invention has at least the following steps (I) to (III):

Method for producing purified chloroprene-based-polymer latex

A zoom lens comprises, in order from an object: a first lens group (G) having positive refractive power; a second lens group (G) having negative refractive power; a third lens group (G) having positive refractive power; a fourth lens group (G) having negative refractive power; and a fifth lens group (G) having positive refractive power, in which the first to the fifth lens groups (Gto G) each move in an optical axis direction upon zooming from a wide angle end state to a telephoto end state, at least a part of the fourth lens group (G) is configured to serve as a focusing lens group to move in the optical axis direction upon focusing, the first lens group (G) consists of two lenses, and the following conditional expression is satisfied.0.30<3/<0.8

Zoom lens, optical apparatus and method for manufacturing the zoom lens

A method for producing a chloroprene-based polymer latex which can efficiently remove a residual volatile organic substance from the chloroprene-based polymer latex while suppressing the deposition of agglomerates is provided. In the method for producing a chloroprene-based polymer latex of the present invention, when the residual volatile organic substance comprised in the latex is volatilized and removed, a mixed fluid of one or more gases selected from the group consisting of inert gases and air, and water is contacted with the latex at a gas pressure higher than the saturated water vapor pressure, and a temperature of the mixed fluid is a temperature lower than a boiling point of water at the gas pressure.

Method for producing chloroprene-based-polymer latex

A zoom lens comprises, in order from an object: a first lens group (G) having positive refractive power; a second lens group (G) having negative refractive power; a third lens group (G) having positive refractive power; a fourth lens group (G) having negative refractive power; and a fifth lens group (G) having positive refractive power, in which the first to the fifth lens groups (Gto G) each move in an optical axis direction upon zooming from a wide angle end state to a telephoto end state, at least a part of the fourth lens group (G) is configured to serve as a focusing lens group to move in the optical axis direction upon focusing, the first lens group (G) consists of two lenses, and the following conditional expression is satisfied.0.30&#x3c;3&#x3c;0.8

According to the embodiment of the present invention, there are provided a first stage auxiliary burner configured to heat up the exhaust gas in the upstream side of the superheater, a second stage auxiliary burner configured to heat up the exhaust gas in the upstream side of the evaporator, a fuel supply system configured to distribute fuel so as to be supplied to the first stage auxiliary burner and the second stage auxiliary burner. Distribution of fuel charged to each of the first stage auxiliary burner and the second stage auxiliary burner is controlled in accordance with a predetermined distribution ratio of each charging quantity to whole charging quantity in all the range thereof.

Heat recovery steam generator and power plant

A zoom lens includes, in order from the object side: a first lens group (G) having positive refractive power, a second lens group (G) having negative refractive power, a third lens group (G) having positive refractive power, and a fourth lens group (G) having positive refractive power. Upon zooming from the wide angle end state to the telephoto end state, the interval between each lens group changes and the fourth lens group (G) moves to the image side after having once moved to the object side. The third lens group (G) has, in order from the object side, a positive lens, a positive lens, and a negative lens. The zoom lens satisfies the following conditional expression: 2.50&#x3c;TLt/(fw*ft)&#x3c;3.30, where TLt is the total length of the zoom lens in the telephoto state, fw is the focal distance of the total zoom lens system in the wide angle state, and ft is the focal distance of the total zoom lens system in the telephoto state.

Zoom lens, optical device, and method for manufacturing the zoom lens

In one embodiment, a combined cycle power plant includes first and second superheaters to generate first and second main steams, first and second reheaters to heat first and second discharge steams to generate first and second reheat steams, and a steam turbine to be supplied with the merged first and second reheat steams. The plant further includes a first valve to adjust a flow rate of the first discharge or reheat steam, and a second valve to adjust a flow rate of the second discharge or reheat steam. A plant control apparatus includes a determination module to determine a target opening degree of the second valve by using flow rates of the first and second main steams, and a controller to compare the determined target opening degree with a valve opening degree of the second valve and to control the second valve based on a comparison result.

Plant control apparatus and combined cycle power plant

In a threaded joint for steel pipes comprising a pin () and a box (), each having a threaded portion (or), a sealing surface (or), and a shoulder surface (or), the sealing surface () of the pin () is formed by a tapered surface, and the sealing surface () of the box () is formed by a first curved surface portion with a large radius of curvature in the range of 15-120 mm, a tapered surface portion, and a second curved surface portion with a large radius of curvature again in the range of 15-120 mm.

Threaded joint for steel pipes

A threaded tubular connection includes a female threaded portion at a first tubular component end and a male threaded portion at a second tubular component end, the female threaded portion including a female thread, at least one female sealing surface on its inner peripheral surface, and at least one female axial abutment surface, the male threaded portion including a male thread, at least one male sealing surface on its outer peripheral surface, at least one axial abutment surface, and a lip disposed between the sealing surface and an axial abutment surface located at a free end of the threaded portion distant from the thread, the male thread being made up into the female thread such that at least one male axial abutment surface is in contact with at least one female axial abutment surface, at least one male sealing surface being in interference contact with at least one corresponding female sealing surface, the portion of the lip between the sealing surface and the axial abutment surface being radially distant from a corresponding surface of the other threaded portion, at least one leak channel being provided in one of the threaded portions to place the chamber formed between the lip and the corresponding surface of the other threaded portion in communication with the interior of the connection.

Threaded connection comprising at least one threaded element with an end lip for a metal tube

A threaded joint for steel pipes comprising a pin () and a box (). The pin has a male thread () and a lip () which comprises (i) a sealing surface () and (ii) a nose portion () provided with a shoulder surface. The box has a female thread (), a sealing surface () and a shoulder surface. The shoulder surface of the pin comprises two distinct adjacent surfaces, main shoulder () in the inner side and sub shoulder () in the outer side. Correspondingly, the shoulder surface of the box comprises two distinct adjacent surfaces, main shoulder () in the inner side and sub shoulder () in the outer side. The main shoulder surfaces of the pin and box are disposed such as to prevent a radially inward deformation of the lip end, and the sub shoulder surfaces of pin and box are disposed such as to limit a radially outward deformation of the lip end. The main shoulder of the pin has a greater radial dimension than said sub shoulder of the pin, and at least the main shoulder surface of the pin is in axial abutment with at least the corresponding main shoulder surface of the box.

An auxiliary burner configured to heat exhaust gas on an upstream side of any one of heat exchangers, and a fuel supply system configured to supply fuel to the auxiliary burner. To avoid damage of a heat-transfer pipe by exhaust gas of high temperature, a reference value on which the restriction on the charging quantity to be supplied to the auxiliary burner is based is set, and the charging quantity of fuel to the auxiliary burner is restricted so as not to exceed a limit defined by the reference value.

A heat recovery steam generator has a plurality of heat exchangers, including superheaters, an evaporatorand an economizer, disposed in a ductalong the flow direction of an exhaust gasfrom a gas turbine, and generates steam by utilizing the exhaust gasfrom the gas turbine. The heat recovery steam generator includes: auxiliary combustors, each disposed upstream of one of the heat exchangers, for heating the exhaust gas by means of burners; and an air supply device for supplying air to the burners of the auxiliary combustorfrom the outside of the duct.

An ascorbic acid derivative composition of a first aspect according to the present invention consists of a salt of a compound (1) represented by a general formula (1) shown below; and a salt of a compound (2) represented by a general formula (2) shown below, wherein a ratio of the salt of the compound (2) with respect to a total amount of the salt of the compound (1) and the salt of the compound (2) is from 0.1 to 10% by mass,  wherein Rrepresents a linear or branched alkyl group of 6 to 20 carbon atoms, Rrepresents a linear or branched alkyl group of 6 to 20 carbon atoms, and Rand Rare the same or are different from each other.

Ascorbic acid derivative composition and production method of the same, ascorbic acid derivative solution, and skin external preparation

A high-strength seamless steel pipe for oil wells excellent in sulfide stress cracking resistance which comprises, on the percent by mass basis, C: 0.1 to 0.20%, Si: 0.05 to 1.0%, Mn: 0.05 to 1.0%, Cr: 0.05 to 1.5%, Mo: 0.05 to 1.0%, Al: 0.10% or less, Ti: 0.002 to 0.05% and B: 0.0003 to 0.005%, with a value of equation 'C+(Mn/6)+(Cr/5)+(Mo/3)' of 0.43 or more, with the balance being Fe and impurities, and in the impurities P: 0.025% or less, S: 0.010% or less and N: 0.007% or less. The seamless steel pipe may contain a specified amount of one or more element(s) of V and Nb, and/or a specified amount of one or more element(s) of Ca, Mg and REM. The seamless steel pipe can be produced at a low cost by adapting an in-line tube making and heat treatment process having a high production efficiency since a reheating treatment for refinement of grains is not required.

Method for producing seamless steel pipe for oil wells excellent in sulfide stress cracking resistance

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Tokyo, Japan

Keiichi Nakamura