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Journal of Materials Science & Technology 2023年第34期165卷 143-152页

作者： koji Hagihara Department of Physical Science and Engineering Nagoya Institute of TechnologyGokisoNagoyaAichi 466-8555Japan Division of Materials and Manufacturing Science Graduate School of EngineeringOsaka University2-1 YamadaokaSuitaOsaka 565-0871Japan

The development of a Ni-based superalloy that consists of only theγ-solid-solution phase is highly desired for some applications such as high-temperature gas-cooled reactors in power *** this study,the temperature dependence of the plastic deformation behavior of Ni-22Cr-8W(at%)alloy was examined for the first time by using a single crystal,focusing on the influence of the short-range order(SRO),especially upon high-temperature deformation *** critical resolved shear stress(CRSS)for(111)[10¯1]slip exhibited a rapid decrease as the temperature increased at low temperatures but an almost constant value of∼45 MPa between 500 and 900℃.In addition,a slight yield stress anomaly(YSA)was observed,reaching a maximum value at 1000℃.To clarify the influence of the SRO on the YSA behavior,the mechanical properties of Ni-8W and Ni-5Re single crystals were also *** temperature dependence for the CRSS,including the occurrence of slight YSA,was observed for Ni-8W,in which SRO *** the Ni-5Re single crystal in which SRO did not significantly develop,however,the CRSS monotonically decreased as the temperature *** results suggest that the presence of SRO in a Ni-Cr-W alloy contributes to the strengthening of the alloy not only at low temperatures but also at high temperatures up to∼1000℃.The results strongly suggested that the pseudo-PLC effect is related to the origin of YSA appearing in Ni-basedγ-solid-solution alloys at high temperatures.

关键词： Ni-based superalloy Short-range order(SRO) Dislocation Yield stress anomaly(YSA)

Effect of annealing temperature on multiferroic properties of Bi_(0.85)Nd_(0.15)FeO_3 thin films prepared by sol-gel method

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Science China(Technological Sciences) 2010年第6期53卷 1572-1575页

作者： goto Takashi Institute for Materials Research Tohoku UniversitySendai 980-8577Japan

Bi0.85Nd0.15FeO3 films were prepared on Pt/Ti/SiO2/Si substrate by a sol-gel method,and annealed at different *** effect of annealing temperature on the crystal structure,dielectric,ferroelectric,and ferromagnetic properties was *** the Bi0.85Nd0.15FeO3 films were annealed at 490-600°C,the single phase was ***0.85Nd0.15FeO3 film annealed at 600°C showed good multiferroic properties with εr of 145 (at 1 MHz),Ms of 44.8 emu/cm3,and 2Pr of 16.6 μC/cm2.

关键词： Bi0.85Nd0.15FeO3 thin films sol-gel method annealing temperature ferroelectric properties ferromagnetic properties

A Review:Structural Oxide Coatings by Laser Chemical Vapor Deposition

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Journal of Wuhan University of Technology(Materials Science) 2016年第1期31卷 1-5页

作者： Takashi goto Institute for Materials Research Tohoku University

Yttria-stabilized zirconia and-alumina films were prepared by laser chemical vapor deposition at deposition rates of several hundred micrometers per ***,the structural oxide coatings by laser chemical vapor deposition are *** laser can significantly accelerate the chemical reaction and grain growth in CVD,yielding high deposition *** films contain large amounts of nanopores that act as thermal insulation and are thus promising as coating materials for gas turbine blades of Ni-based superalloys and WC-Co cutting tools.

关键词： laser CVD yttria-stabilized zirconia alumina plasma nano-pores

Recent Advances in Protein Extraction and Chiral Separation of Biomolecules

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Tsinghua Science and Technology 2006年第2期11卷 194-201页

作者： Masahiro goto Department of Applied Chemistry Graduate School of Engineering Kyushu University Fukuoka Japan

Reverse micelles create unique environment in organic media. They are capable of solubilizing hydrophilic biomolecules （e.g., proteins, peptides, amino acids, and DNAs） in their aqueous interior. This feature brings about the practical use of biomaterials in organic media because reverse micelles solubilize them with the intrinsic activity. In this paper, we focus on recent two topics concerning protein extraction and chiral separation of biomolecules using liquid membranes. In the first topic, we present recent attempts to extract proteins from an aqueous solution into isooctane using reverse micelles, and some important operational parameters to achieve an efficient protein transfer are discussed. Furthermore, novel function of reverse micelles as a protein activation medium is introduced. In the reverse micellar phase, denatured proteins were completely reactivated in the reverse micellar solution. The reverse micellar technique is found to be a useful tool not only for protein separation but also for protein refolding. Furthermore, we found that a cyclic ligand carixarene has an extraction ability to set up optimum conditions for protein transfer. In the second topic, we have found that a supported liquid membrane （SLM） encapsulating enzymes shows high enantioselectivity （enantioselective excess value is over 96%） in the transport of racemic pharmaceutical compound ibuprofen. A different experiment also suggests that the α-chymotrypsin-catalyzed reactions droved the enantioselective transport of L-phenylalanine based on the enantioselectivity of the enzyme. The SLM encapsulating the surfactant-enzyme complex enabled the highly enantioselective separation of racemic mixtures. It can be envisioned that arrangement of appropriate enzymes in the SLM system will allow enantioselective separation of various useful organic compounds.

关键词： protein extraction chiral separation reverse micellar technique

Bell Operator Method to Classify Local Realistic Theories

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Chinese Physics Letters 2010年第3期27卷 29-32页

作者： koji Nagata Department of Agriculture and of Veterinary Medicine National Research Center for Protozoan Diseases University of Obihiro West 2-13 Inada Obihiro Hokkaido 080-8555 Japan

We review the historical fact of multipartite Bell inequalities with an arbitrary number of settings. An explicit local realistic model for the values of a correlation function, given in a two-setting Bell experiment （two-setting model）, works only for the specific set of settings in the given experiment, but cannot construct a local realistic model for the values of a correlation function, given in a continuous-infinite settings Bell experiment （infinite-setting model）, even though there exist two-setting models for all directions in space. Hence, the two-setting model does not have the property that the infinite-setting model has. Here, we show that an explicit two-setting model cannot construct a local realistic model for the values of a correlation function, given in an M-setting Bell experiment （M-setting model）, even though there exist two-setting models for the M measurement directions chosen in the given M-setting experiment. Hence, the two-setting model does not have the property that the M-setting model has.

关键词： Quantum information and quantum mechanics

Contour detection with bicubic spline surfaces

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International Journal of Digital Earth 2023年第1期16卷 1801-1827页

作者： Hiroyuki goto Taiki Otsuka Department of Industrial and Systems Engineering Hosei UniversityTokyoJapan Faculty of IT and Business Cyber UniversityTokyoJapan

Contour detection has a rich history in multiplefields such as geography,engineering,and earth *** predominant approach is based on piecewise planar tessellation and now being challenged concerning the extraction of contour objects for non-linear elevation functions,particularly with respect to bicubic spline functions.A storage-efficient method was developed in previous research,but the detection of the complete set of contour objects is yet to be *** intractable,theoretical underpinnings pertinent to curvature resulted in an approach to realize the complete detection of *** a digital elevation model dataset,in this study,a bicubic spline surface function wasfirst ***,candidate initial points on the edges across the region of interest were identified,and the recursive disaggregation of rectangles was repeated if the non-existence of a solution could not be assured.A developed tracking method was then *** advancement,other initial points on the same contour curve were identified and eliminated to circumvent duplicate *** completeness of the outlets provides analytical tools for elevation and other geographical *** experiments included the development of a three-dimensional contour-based network and slope *** latter application transforms the slope analysis type from raster-based to *** of a complete set of contour objects amenable to bicubic spline surfaces..Small closure inside a single patch is detectable if size exceeds the standard..Curvature&tolerances central to step length adjustment and tangent angle determination..Redundant initial points are identified and eliminated during the tracking process..Various potential applications in addition to geographical elevations.

关键词： Contour detection bicubic spline surface curvature tolerance patch disaggregation

Storage-efficient reconstruction framework for planar contours

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Geo-Spatial Information Science 2017年第1期20卷 14-28页

作者： Hiroyuki goto Yoichi Shimakawa Department of industrial and system engineering Hosei UniversitytokyoJapan Department of computer science and technology salesian polytechniquetokyoJapan

A storage-efficient reconstruction framework for cartographic planar contours is *** a smaller number of control points,we aim to calculate the area and perimeter as well as to reconstruct a smooth *** input data forms an oriented contour,each control point of which consists of three values:the Cartesian coordinates(x,y)and tangent angleθ.Two types of interpolation methods are developed,one of which is based on an arc spline while the other one is on a cubic Hermite *** arc spline-based method reconstructs a G1 continuous curve,with which the exact area and perimeter can be *** benefit of using the Hermite spline-based method is that it can achieve G2 continuity on most control points and can obtain the exact area,whereas the resulting perimeter is *** a numerical experiment for analytically defined curves,more accurate computation of the area and perimeter was achieved with a smaller number of control *** another experiment using a digital elevation model data,the reconstructed contours were smoother than those by a conventional method.

关键词： Oriented contour arc spline cubic Hermite spline geometric continuity storage efficient

Kink-band formation in directionally solidified Mg/Mg_(2)Yb and Mg/Mg_(2)Ca eutectic alloys with Mg/Laves-phase lamellar microstructure

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Journal of Magnesium and Alloys 2022年第2期10卷 530-538页

作者： koji Hagihara Kosuke Miyoshi Division of Materials and Manufacturing Science Graduate School of EngineeringOsaka University2-1YamadaokaSuitaOsaka 565-0871Japan Department of Adaptive Machine Systems Graduate School of EngineeringOsaka University2-1 YamadaokaSuitaOsaka 565-0871Japan Department of Physical Science and Engineering Nagoya Institute of TechnologyNagoya 466-8555Japan

For the development of high-strength Mg alloys,active use of Laves phases such as C14-type Mg_(2)Yb and Mg_(2)Ca is strongly ***,the brittleness of the Laves phases is the biggest obstacle to *** first found that kink-band formation can be induced in directionally solidified Mg/Mg_(2)Yb and Mg/Mg_(2)Ca eutectic lamellar alloys when a stress is applied parallel to the lamellar interface,leading to a high yield stress accompanied with *** is,microstructural control can induce a new deformation mode that is not activated in the constituent phases,thereby inducing *** was clarified that the geometric relationship between the operative slip plane in the constituent phases and the lamellar interface,and the microstructural features that provide kink-band nucleation sites are important factors for controlling kink-band *** obtained results show a possibility to open the new door for the development of novel high-strength structural material using the kink bands.

关键词： Deformation kink band Lamellar microstructure Laves phase Magnesium alloys Mechanical properties

Three-Dimensional Leaf Edge Reconstruction Combining Two-and Three-Dimensional Approaches

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Plant Phenomics 2024年第3期6卷 532-546页

作者： Hidekazu Murata koji Noshita Department of Biology Kyushu UniversityFukuokaFukuoka 819-0395Japan Plant Frontier Research Center Kyushu UniversityFukuokaFukuoka 819-0395Japan

Leaves,crucial for plant physiology,exhibit various morphological traits that meet diverse functional *** leaf morphology quantification,largely 2-dimensional(2D),has not fully captured the 3-dimensional(3D)aspects of leaf *** improvements in 3D data acquisition,accurately depicting leaf morphologies,particularly at the edges,is *** study proposes a method for 3D leaf edge reconstruction,combining 2D image segmentation with curve-based 3D *** deep-learning-based instance segmentation for 2D edge detection,structure from motion for estimation of camera positions and orientations,leaf correspondence identification for matching leaves among images,and curve-based 3D reconstruction for estimating 3D curve fragments,the method assembles 3D curve fragments into a leaf edge model through B-spline curve *** method's performances were evaluated on both virtual and actual leaves,and the results indicated that small leaves and high camera noise pose greater challenges to *** developed guidelines for setting a reliability threshold for curve fragments,considering factors occlusion,leaf size,the number of images,and camera error;the number of images had a lesser impact on this threshold compared to *** method was effective for lobed leaves and leaves with fewer than 4 ***,challenges still existed when dealing with morphologies exhibiting highly local variations,such as *** nondestructive approach to 3D leaf edge reconstruction marks an advancement in the quantitative analysis of plant *** is a promising way to capture whole-plant architecture by combining 2D and 3D phenotyping approaches adapted to the target anatomical structures.

关键词： edge leaf approaches combining dimensional reconstruction three