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- 저자 : Ouchi, K. (검색결과 69 건)
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Ouchi, Makoto,Ito, Makoto,Kamemoto, Satoshi,Sawamoto, Mitsuo Wiley (John WileySons) 2008 Chemistry - An Asian Journal Vol. No.
<P>The systematic search and design of phosphine ligands (PR(3)) and amine cocatalysts resulted in obtaining pentamethyl-cyclopentadienyl (Cp*) ruthenium(II) phosphine complexes [RuCp*Cl(PR(3))(2)], which are highly active and removable catalysts, for transition-metal-catalyzed living radical polymerization of methyl methacrylate (MMA). The catalysts are conveniently prepared in situ from a tetrameric precursor [RuCp*(mu(3)-Cl)](4) and a selected phosphine (PR(3)). The combination of the meta-tolyl phosphine [P(m-Tol)(3)] ligand and a primary diamine cocatalyst [NH(2)(CH(2))(6)NH(2)] provides a highly active catalytic system with precision control of the molecular weight of the polymer. The high activity enables a low catalyst dose and a high turn-over frequency without deteriorating the controllability. A hydrophilic amine cocatalyst (amino alcohol) in place of the diamine, further forms an active and removable catalyst; simple treatment with acidic water gave colorless polymers visually free from metal residues (>97 % removal; <64 ppm).</P>
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Ouchi, Kazuo,Yang, Chan-Su IEEE 2018 IEEE geoscience and remote sensing letters Vol.15 No.4
<P>This letter shows the phenomena of Brewster angle damping and its implication observed in the synthetic aperture radar (SAR) images of concrete constructions, such as a bridge and seawalls over the sea. The Fresnel reflection coefficient of concrete material is close to zero at the Brewster angle for X-band V-polarization microwave. The TerraSAR-X images of Tokyo Bay, Japan, at small incidence angles (20.1°–21.4°) showed strong double-bounce reflection between the sea surface and coastal structure with HH-polarization, whereas very little radar backscatter was observed with VV-polarization. The same little radar backscatter was seen in the images of concrete walls on ground and swamp areas covered with reeds. This effect is illustrated with HH/VV intensity and phase difference images, and ground survey data; its implication is also suggested for a better understanding of polarimetric SAR images.</P>
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Outline of the Ocean Nutrient Enhancer 'TAKUMI'
Ouchi, Kazuyuki The Korean Association of Ocean Science and Techno 2005 Journal of Ocean Science and Technology Vol.2 No.1
The five years project of increasing a primary production and making a new fishing ground by upwelling Deep Ocean Water (DOW) which is very rich in nutrient salt such as Nitrogen, Phosphorus, etc. was commenced in the year of 2000, sponsored by the Fisheries Agency of Japanese Government and Marino-Forum 21. In the open ocean, so far, there are no successful means to upwell DOW artificially and to make a fishing ground. Therefore, the focus of the project is a creation and proposition of the concept of Ocean Nutrient Enhancer (ONE) to contribute for increasing primary productions and fish productions, furthermore, conducting the experiment in actual sea to" confirm the effect of the ONE. The requisite technologies for the ONE such as making an artificial density current, a spar type floating structure, a hang off steel riser pipe, a set-up way of upending the riser pipe, etc. was discussed and integrated to create proto-type of ONE, whose main specifications are the DOW upwelling depth and capacity of 200 m and 100,000 $m^3/day$, the displacement of about 1,700tons, and Diesel engine of 100 KW. The ONE was set-up with the single point mooring system at the centre of rotational flow in Sagami Bay in the depth of about 1,000 m, and came into the operation in June 2003. In this paper, the outline of the prototype of ONE which was named "TAKUMI" is introduced.
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Domain Size Distribution in the TDGL System Driven by a Dichotomous Markov Noise
Katsuya Ouchi,Hirokazu Fujisaka,Naofumi Tsukamoto,Takehiko Horita 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.50 No.1I
The domain size distribution of a magnetization obeying the time-dependent Ginzburg-Landau equation driven by a dichotomous Markov noise is discussed. The ensemble average of the distribution function hn(l, t)i for the domain size l obeys a power law hn(l, t)i / l. with ' 2. A phenomenological evolution equation of n(l, t) is proposed, and a mechanism for constructing the power-law distribution is investigated by using the evolution equation.?
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Nobuo Ouchi 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.56 No.61
The Japan Proton Accelerator Research Complex (J-PARC) is in phase-I now. The complex consists of three accelerators a linac, a 3-GeV rapid cycling synchrotron (RCS), and a 50-GeV main ring synchrotron (MR), and three experimental facilities the Materials and Life Science Experimental Facility (MLF), the Hadron Experimental Facility, and the Neutrino Experimental Facility. After the beam commissioning of the RCS, the first beam injection, circulation, and acceleration to 30 GeV in the MR, and the first neutron and muon generation in the MLF were successfully performed in 2008. User operation of the MLF was also started in December 2008. In addition,high-beam-power demonstrations were performed at the RCS 322-kW equivalent power in single shot operation. In 2009, the first beams were injected from the MR to both the Hadron Experimental Facility and the Neutrino Experimental Facility. Therefore, proton beams have now reached all experimental facilities. Recent progress at J-PARC in 2008 and 2009 will be presented.
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J-PARC Linac Facilities and their Features
Nobuo Ouchi 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.4
The Japan Proton Accelerator Complex (J-PARC), which consists of a 600-MeV linac, a 3-GeV rapid cycling synchrotron, a 50-GeV synchrotron and experimental facilities, is not only one of the most powerful proton accelerators in the world but also a multipurpose accelerator for neutron science, muon science, nuclear and elementary particle physics, and nuclear engineering. The linac building and its conventional facilities were designed and constructed carefully in consideration of stable operation and further upgrade. The linac building, which has two stories above ground and two stories below ground, was completed in April, 2005. The conventional facilities were also completed in August 2005. The installation of the accelerator began in April 2005. The ion source, the radio-frequency quadrupole linac (RFQ), the drift tube linac (DTL) tanks, the medium energy beam transport between the RFQ and the DTL (MEBT1), and the beam transport to the 3-GeV synchrotron have already been installed. Installation of the separated-type drift tube linac (SDTL) tanks and the RF system are being continued. This paper describes the J-PARC linac facilities and their features in terms of the building and conventional facilities, as well as the present status of the linac installation.
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Nobuo Ouchi 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.3
The Japan Proton Accelerator Research Complex (J-PARC) is not only one of the most powerful proton accelerators in the world but also a multipurpose accelerator for neutron science, muon science, nuclear and particle physics, and nuclear engineering. Since 2001, it has been in its first constructing phase, which consists of three accelerators, i.e., the Linac, the 3-GeV rapid cycling synchrotron (RCS), and the 50-GeV main ring synchrotron (MR), and three experimental facilities, i.e., the Materials and Life Science Experimental Facility (MLF), the Hadron Experimental Facility, and the Neutrino Experimental Facility. The construction and the commissioning of the J-PARC are in progress and are almost on schedule. A beam commissioning of the Linac was performed successfully, and it is ready for beam injection to the RCS now. The installation and the off-beam commissioning of the RCS have been completed and the beam commissioning will start in October, 2007. In the MR, the MLF, and the Hadron Experimental Facilities, installation of equipments is in progress towards beam commissioning in 2008. In the Neutrino Experimental Facility, civil construction is going on towards beam commissioning in 2009. This paper provides the present status and near-future plan for the construction and commissioning of various components in the J-PARC project. The Japan Proton Accelerator Research Complex (J-PARC) is not only one of the most powerful proton accelerators in the world but also a multipurpose accelerator for neutron science, muon science, nuclear and particle physics, and nuclear engineering. Since 2001, it has been in its first constructing phase, which consists of three accelerators, i.e., the Linac, the 3-GeV rapid cycling synchrotron (RCS), and the 50-GeV main ring synchrotron (MR), and three experimental facilities, i.e., the Materials and Life Science Experimental Facility (MLF), the Hadron Experimental Facility, and the Neutrino Experimental Facility. The construction and the commissioning of the J-PARC are in progress and are almost on schedule. A beam commissioning of the Linac was performed successfully, and it is ready for beam injection to the RCS now. The installation and the off-beam commissioning of the RCS have been completed and the beam commissioning will start in October, 2007. In the MR, the MLF, and the Hadron Experimental Facilities, installation of equipments is in progress towards beam commissioning in 2008. In the Neutrino Experimental Facility, civil construction is going on towards beam commissioning in 2009. This paper provides the present status and near-future plan for the construction and commissioning of various components in the J-PARC project.
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