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Now showing items 1 - 16 of 114

  • METHOD AND PROGRAM FOR CREATING THREE-DIMENSIONAL DATA

    [Problem] To provide a method for creating composited three-dimensional data by acquiring point group data through high-speed scanning in a short period of time without using a target for measurement, and compositing the point group data acquired from multiple directions. [Solution] An object to be measured W is placed on a reference axis C, and at least first and second 3D scanners, set so as to be pointed toward the reference axis from multiple different directions which are in the same plane perpendicular to the reference axis and of which the center is the reference axis, are used. Each of the at least first and second 3D scanners scans, in a single frame, a scanning region of the surface of the object to be measured in a stationary position, acquires, from scanning data of a single frame of the first and second 3D scanners, first and second point group data formed of color data and position data of respective multiple points toward the surface of the object to be measured, and creates composited three-dimensional data by combining the first and second point group data.
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  • TRUE DENSITY MEASUREMENT DEVICE

    This true density measurement device (10) is a device for measuring the true density of a sample (100) by a gas phase substitution method, and is provided with a sample chamber (30) for housing the sample (100), and a lid (42) for providing closure to an opening (31) of the sample chamber (30). The lid (42) is a non-rotating lid that is pressed against the rim of the opening (31) to hermetically seal the sample chamber (30).
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  • METHOD FOR GENERATING THREE-DIMENSIONAL SHAPE DATA

    [Problem] To provide a method for generating combined three-dimensional shape data by acquiring point cloud data and combining point cloud data acquired from a plurality of directions, in a short time by high-speed scanning and without the use of a target used for measuring. [Solution] In the present invention, an object W to be measured is placed on a reference axis C, and at least first and second 3D scanners are used, being set on the same plane perpendicular to the reference axis so as to point toward the reference axis from a plurality of different directions with the reference axis as the center. A scan area of the surface of the object to be measured in a stationary position is scanned with one frame by each of at least the first and second 3D scanners, first and second point cloud data composed of position data and color data of a plurality of points on the surface of the object to be measured are acquired from scan data of the one frame of each of the first and second 3D scanners, and the first and second point cloud data are combined to generate combined three-dimensional shape data.
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  • TRUE DENSITY MEASUREMENT DEVICE

    This true density measurement device (10) is a device that is used to measure the true density of a sample (100) by a gas phase substitution method, and is provided with: a sample chamber (30) for accommodating the sample (100), the sample chamber (30) being pressurized through the introduction of an inert gas; and an expansion chamber (50) into which is released the inert gas filling the sample chamber (30). The expansion chamber (50), under conditions of normal use, is opened and closed by a detachable cover (42), and the volume thereof is modified by insertion or withdrawal of a volume modification member (55).
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  • SUBSTRATE FOR HYDROGEN EQUIPMENT AND METHOD FOR MANUFACTURING SAME

    Provided is a substrate for use in hydrogen equipment in which steel, which is affected by hydrogen when used alone, is hot-dip plated with an aluminum-tin-based aluminum alloy with an added tin quantity of 1-5%, forming a coating resistant to hydrogen penetration that has a three-layer structure, formed by layering an aluminum-based intermetallic compound layer, an aluminum layer, and an alumina layer in this order onto the surface of the steel, with the thickness of the aluminum-based intermetallic compound layer being 1-22 µm and the mean thickness of the coating being less than 35 µm. The steel that serves as the matrix for this coating is a steel that is affected by hydrogen, such as carbon steel, low-alloy steel, ferrite-based stainless steel, martensite-based stainless steel, or the like. When used as a substrate for use in hydrogen equipment used in high-pressure hydrogen environments, this substrate can prevent hydrogen embrittlement, increase durability, and keep production costs low.
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  • Theoretical prediction of piezoelectric property of new LiNbO3-type compound AlTlO3

    Nakamura, Kaoru   Ohnuma, Toshiharu  

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  • Photobiocatalyzed asymmetric reduction of ketones using Chlorella sp MK201

    Itoh, Ken-ichi   Nakamura, Kaoru   Aoyama, Tadashi   Matsuba, Ryusuke   Kakimoto, Tsuyoshi   Murakami, Masahiko   Yamanaka, Rio   Muranaka, Toshiya   Sakamaki, Hiroshi   Takido, Toshio  

    Aromatic ketones were reduced using suspension culture of Chlorella sp. MK201 under fluorescent light illumination producing the corresponding chiral alcohols in high yields with excellent enantiomeric excess (ee). For example, 2',3',4',5',6'-pentafluoroacetophenone at 0.25 mg/ml was converted to the corresponding (S)-alcohol in 80 % yield with >99 % ee by 1 mg dry wt of Chlorella/ml in 12 h illumination (2,000 lux).
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  • First-principles investigation of pressure-induced phase transition in LiNbO3

    Nakamura, Kaoru   Higuchi, Sadao   Ohnuma, Toshiharu  

    We explore the possible high-pressure phase transition of LiNbO 3 using an evolutionary algorithm combined with first-principles calculations. A NaIO 3-type structure with Pnma symmetry was predicted as the room temperature phase, and an apatite-like structure with P6 3/m symmetry was predicted as the high temperature, high-pressure phase. These predictions are consistent with the experimental findings of Mukaide et al. [J. Appl. Phys. 93, 3852 (2003)]. Interestingly, however, the thermodynamic stability of the Cmcm phase was found to be greater than that of the Pnma phase below 50 GPa. In order to explain this, we investigated the possible deformation paths between R3c and high-pressure phases and found that a high energy barrier hinders Cmcm formation, despite its greater thermodynamic stability. In sum, our results indicate that an understanding of the atomistic mechanisms behind phase transition is essential in order to correctly predict phase transition behavior.
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  • First-principles investigation of pressure-induced phase transition in LiNbO3

    Nakamura, Kaoru   Higuchi, Sadao   Ohnuma, Toshiharu  

    We explore the possible high-pressure phase transition of LiNbO3 using an evolutionary algorithm combined with first-principles calculations. A NaIO3-type structure with Pnma symmetry was predicted as the room temperature phase, and an apatite-like structure with P6(3)/m symmetry was predicted as the high temperature, high-pressure phase. These predictions are consistent with the experimental findings of Mukaide et al. [J. Appl. Phys. 93, 3852 (2003)]. Interestingly, however, the thermodynamic stability of the Cmcm phase was found to be greater than that of the Puma phase below 50 GPa. In order to explain this, we investigated the possible deformation paths between R3c and high-pressure phases and found that a high energy barrier hinders Cmcm formation, despite its greater thermodynamic stability. In sum, our results indicate that an understanding of the atomistic mechanisms behind phase transition is essential in order to correctly predict phase transition behavior. (C) 2012 American Institute of Physics. [doi:10.1063/1.3682522]
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  • Arabidopsis thaliana: a novel biocatalyst for asymmetric reductions

    Ogata, Yuka   Kojima, Hideo   Okada, Akiko   Uranishi, Yosuke   Nakamura, Kaoru  

    We used Arabidopsis thaliana seedlings as biocatalysts for the reduction of ketones, and investigated the factors affecting the chemical yield and enantioselectivity of the reactions. One-to four-week-old Arabidopsis seedlings were incubated for 24 h in reaction mixture containing either aromatic or aliphatic ketone as a substrate. After the reaction, the ketones and corresponding alcohols were extracted and quantified. The results indicated that Arabidopsis seedlings can be used as a biocatalyst for asymmetric reduction of ketones such as trifluoroacetophenone, t-butyl acetoacetate, methyl benzoylformate, and 2-(trifluoroacetyl) thiophene. The highest chemical yields were observed in seedlings pre-incubated under light conditions and in leaves, suggesting that asymmetric ketone reduction might be related to photosynthesis. In contrast, the age and size of seedlings did not have a significant effect on chemical yield or enantioselectivity. The findings suggest that Arabidopsis, which is widely used as a model plant system, presents a new opportunity for biotransformation.
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  • [Phys. Rev. B\r 75\r , 184109 (2007)]

    Nakamura, Kaoru   Mizoguchi, Teruyasu   Shibata, Naoya   Matsunaga, Katsuyuki   Yamamoto, Takahisa   Ikuhara, Yuichi  

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  • Juvenile delinquents' loneliness as represented on the Doll Location Test

    Nakamura, Kaoru  

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  • Biotransformation of estragole by the plant cultured cells of Caragana chamlagu

    Itoh, Ken-ichi   Nakamura, Kaoru   Murakami, Masahiko   Satoh, Hiroaki   Aoyama, Tadashi   Kitanaka, Susumu   Sakamaki, Hiroshi   Takido, Toshio  

    Estragole (EG) is biosynthesized in herbs including anise, basil, bay, tarragon, fennel and marjoram, and is thought to be a useful biomass for the food and health industries. Moreover, the metabolites from estragole are useful intermediates in organic synthetic chemistry. However, estragole has been transformed only by chemical methods, and no biocatalysts have been reported. In this paper, we report the biotransformation of estragole using the plant cells of Caragana chamlagu gave 4-methoxycinnamaldehyde (MCAL), 4-methoxycinnamyl alcohol (MCA) and 4-methoxybenzaldehyde (MBAL). In addition, we propose a reaction mechanism in the biotransformation of estragole using Caragana chamlagu. Since estragole generates malignant liver tumors in the rat, it is necessary to reduce exposure. The present study reveals the transformation of harmful estragole. Furthermore, we succeeded in biotransforming estragole as biomass using plant cells into useful compounds.
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  • Fusarium wilt of sweet pea caused by Fusarium oxysporum in Miyazaki, Japan.

    Imamura, Yukihisa   Kuno, Kohko   Kohroki, Hiromi   Nakamura, Kaoru   Jinkawa, Tomoe  

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  • First-principles study of grain boundary sliding in

    Nakamura, Kaoru   Mizoguchi, Teruyasu   Shibata, Naoya   Matsunaga, Katsuyuki   Yamamoto, Takahisa   Ikuhara, Yuichi  

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  • Theoretical Tensile Deformation of Σ13 Pyramidal Twin Grain Boundary in Alumina

    Nakamura, Kaoru   Mizoguchi, Teruyasu   Shibata, Naoya   Yamamoto, Takahisa   Ikuhara, Yuichi  

    First-principles grain boundary (GB) tensile deformation simulations were performed to investigate the atomic-scale mechanism of GB fracture of the Σ13 pyramidal twin GB in α-Al2O3. It was found that the specific Al-O bond broke at the GB core in the early stage of tensile deformation. From chemical bonding analyses, the first breaking bond was the weakest bond in the GB core. However, when the catastrophic GB fracture started, initially strong Al-O bond broke. This indicates that local atomic bonds should determine the microscopic GB fracture behavior.
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