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Effect of solid-solution strengthening on deformation mechanisms and strain hardening in medium-entropy V_(1-x)Cr_(x)CoNi alloys

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Journal of Materials Science & Technology 2022年第13期108卷 270-280页

作者： Hyun Chung Dae Woong Kim Woo Jin Cho Heung Nam Han Yuji Ikeda shoji Ishibashi Fritz Körmann Seok Su Sohn Department of Materials Science and Engineering Korea UniversitySeoul 02841South Korea Center for High Entropy Alloys Pohang University of Science and TechnologyPohang 37673South Korea Department of Materials Science and Engineering and Research Institute of Advanced Materials Seoul National UniversitySeoul 08826South Korea Institute for Materials Science University of StuttgartPfaffenwaldring 55Stuttgart 70569Germany Computational Materials Design Max-Planck-Institut für Eisenforschung GmbHMax-Planck-Strabe 1Düsseldorf 40237Germany Research Center for Computational Design of Advanced Functional Materials(CD-Fmat) National Institute of Advanced Industrial Science and Technology(AIST)TsukubaIbaraki 305-8568Japan Department of Materials Science and Engineering Delft University of TechnologyMekelweg2Delft 2628 CDthe Netherlands

High-and medium-entropy alloys(HEAs and MEAs)possess high solid-solution *** investigations have been conducted on its impact on yield strength,however,there are limited reports regarding the relation between solid-solution strengthening and strain-hardening *** addition,no attempt has been made to account for the dislocation-mediated plasticity;most works focused on twinning-or transformation-induced plasticity(TWIP or TRIP).In this work we reveal the role of solidsolution strengthening on the strain-hardening rate via systematically investigating evolutions of deformation structures by controlling the Cr/V ratio in prototypical V_(1-x)Cr_(x)CoNi *** the TWIP of CrCoNi with the dislocation slip of V_(0.4)Cr_(0.6)CoNi,the hardening rate of CrCoNi was superior to slip-band refinements of V_(0.4)Cr_(0.6)CoNi due to the dynamic Hall-Petch ***,as V content increased further to V_(0.7)Cr_(0.3)CoNi and VCoNi,their rate of slip-band refinement in V_(0.7)Cr_(0.3)CoNi and VCoNi with high solid-solution strength surpassed that of *** it is generally accepted in conventional alloys that deformation twinning results in a higher strain-hardening rate than dislocation-mediated plasticity,we observed that the latter can be predominant in the former under an activated huge solid-solution strengthening *** high solid-solution strength lowered the cross-slip activation and consequently retarded the dislocation rearrangement rate,i.e.,the dynamic *** delay in the hardening rate decrease,therefore,increased the strain-hardening rate,results in an overall higher strain-hardening rate of V-rich alloys.

关键词： Medium-entropy alloy Tensile property Solid-solution strength Strain-hardening rate Stacking fault energy

Production of Mono Dispersed Silicon Balls for Solar Cells by Intermittent Electromagnetic Pinch Force

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Journal of Iron and Steel Research International 2012年第S1期19卷 501-504页

作者： Akihiro Minagawa Shin-ichi Shimasaki shoji Taniguchi Graduate School of Environmental Studies Tohoku University Aoba-yama 6-6-02Aoba-kuSendai 980-8579Japan

A new method to produce mono dispersed silicon balls is *** this method,mono dispersed droplets are formed directly from a capillary jet of molten *** silicon droplets fall down in a cooling tower and they are solidified into mono dispersed *** electromagnetic pinch force is applied intermittently to the jet of molten silicon in order to generate fluctuations of equal interval on the surface of the *** the fluctuations grow,the molten silicon jet is broken up into droplets according to a frequency of the pinch force,if the frequency is lower than a critical value derived by a liner instability *** simulation of the breakup of the capillary jet is carried out by a multiphase fluid flow analysis with an electromagnetic force *** simulation results are compared with model experiments and the agreement between the two is good.

关键词： silicon ball jet break-up solar cell electromagnetic force

Regeneration of rat corpora cavernosa tissue by transplantation of CD133＋ cells derived from human bone marrow and placement of biodegradable gel sponge sheet

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Asian Journal of Andrology 2017年第2期19卷 203-207页

作者： Shogo Inoue Katsutoshi Miyamoto Shunsuke Shinmei Koichi shoji Jun Teishima Kazuhiro Sentani Wataru Yasui Akio Matsubara Department of Urology Hiroshima University Institute of Biomedical and Health Sciences Hiroshima Japan Department of Molecular Pathology Hiroshima University Institute of Biomedical and Health Sciences Hiroshima Japan

The objective is to develop an easier technique for regenerating corpora cavernosa tissue through transplantation of human bone marrow-derived CD133＋ cells into a rat corpora cavernosa defect model. We excised 2 mm× 2 mm squares of the right corpora cavernosa of twenty-three 8-week-old male nude rats. AIginate gel sponge sheets supplemented with 1 × 10^4 CD133＋ cells were then placed over the excised area of nine rats. Functional and histological evaluations were carried out 8 weeks later. The mean intracavernous pressure/mean arterial pressure ratio for the nine rats （0.34258 ± 0.0831） was significantly higher than that for eight rats with only the excision （0.0580±0.0831, P = 0.0238） and similar to that for five rats for which the penis was exposed, and there was no excision （0.37228±0.1051, P = 0.8266）. Immunohistochemical analysis revealed that the nine fully treated rats had venous sinus-like structures and quantitative reverse transcription polymerase chain reaction analysis of extracts from their alginate gel sponge sheets revealed that the amounts of mRNA encoding the nerve growth factor （NGF）, and vascular endothelial growth factor （VEGF） were significantly higher than those for rats treated with alginate gel sheets without cell supplementation （NGF： P= 0.0309; VEGF： P〈 0.0001）. These findings show that transplantation of CD133＋ cells accelerates functional and histological recovery in the corpora cavernosa defect model.

关键词： alginate gel sponge sheet CD133+ cell corpora cavernosa

Analysis Scheme for Density Modulation Experiments to Study Particle Confinements

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Plasma Science and Technology 2006年第1期8卷 65-71页

作者： K. TANAKA C. MICHAEL K. KAWANATA T. TOKUZAWAI M. shoji K. TOI 高翔揭银先 National Institute for Fusion Science Toki 509-5292 Japan Institute of Plasma Physics Chinese Academy of Science Hefei 230031 China

Density modulation experiments are powerful experimental schemes for the study of particle transport. The diffusion coefficients （D） and convection velocity （V）, which cannot be evaluated from the particle balance in the equilibrium state, can be obtained separately. Further, the estimated values of D and V are determined independent of the absolute value of the particle source rate, which is difficult to obtain experimentally. However, the sensitivities and interpretation of D and V from the modulation experiments need to be considered. This paper describes numerical techniques for solving the particle balance equation of the modulation components. Examples of the analysis are shown regarding the data of LHD experiments, and the results of the modulation experiments are discussed.

关键词： density modulation, particle confinements, diffusion coefficient convection velocity

Features of Boiling on an Artificial Surface—Bubble Formation, Wall Temperature Fluctuation and Nucleation Site Interaction

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Journal of Thermal Science 2002年第3期11卷 226-234页

作者： M.shoji R.Mosdorf L.Zhang Y.Takagi K.Yasui M.Yokota Department of Mechanical Engineering The University of Tokyo Tokyo Japan Faculty of Computer Science Bialystok University of Technology ul. Wiejska Poland

The artificial surfaces are applied to study the pool boiling features, including the bubble behaviors, the surface temperature fluctuation, the heat transfer characteristics and nucleate site interaction. Three sets of experiments are carried out to investigate the influences of cavity shape, cavity size, cavity spacing on the boiling phenomena. Experimental results reveal that bubbling from the cylindrical as well as reentrant cavity is generally stable. The influence of cavity diameter on the bubble behaviors and the temperature fluctuation seems very weak while the effect of cavity depth cannot be neglected. As for the two cavity conditions, the bubble behaviors show the different features depending on the dimensionless cavity spacing. Three significant factors (thermal interaction, hydraulic interaction, bubble coalescence) control the nucleation site interaction, and the competition and dominance of the factors yield four interaction regimes.

关键词： pool boiling artificial surface boiling chaos nucleation site interaction.

Reaction-Diffusion Algorithm for Quantitative Analysis of Periodic V-Shaped Bundles of Hair Cells in the Inner Ear

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Journal of Biosciences and Medicines 2022年第3期10卷 240-251页

作者： Hiroto shoji Ryo Iwamoto Department of Science and Technology Kwansei Gakuin University Sanda Hyogo Japan

Columnar outer hair cells of the inner ear form V-shaped bundles, which are arranged in three rows in the cochlea. If the formation of these V-shaped bundles is disturbed, sensorineural hearing loss occurs. To quantify the distribution of V-shaped bundles, the use of a Turing-type reaction-diffusion (RD) system, including anisotropic diffusion, should be considered. We found that a periodic triangle pattern appears based on the anisotropy in the RD system. Then, using the proposed RD system, the image of the V-shaped bundle was examined. The results showed that the correlation between the RD pattern and V-shape bundles not only classifies the experimental result but also significantly differs in the number of directional changes in a set of V-shape bundle. Therefore, this process can help quantify the images of V-shaped bundles.

关键词： Reaction-Diffusion Turing Triangle Inner Ear

12th International Symposium on River Sedimentation(ISRS2013)(Kyoto,Japan,Sep.2-5,2013)

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International Journal of Sediment Research 2012年第1期 128-129页

作者： shoji FUKUOKA Chairman of the ISRS2013 Local Organizing Committee

Date:Sep.2-5,2013 Venue:KYOTO TERRSA,Kyoto,Japan Organizer: Research Center for Fluvial & Coastal Disasters Disaster Prevention Research Institute,Kyoto University Erosion and sedimentation processes in river catchments as well as their management are of global *** social,economic,environmental and political impacts of these processes are *** pose great challenges for our human society on the way to the mid-21st century.

关键词： International Symposium on River Sedimentation ISRS2013 Kyoto,Japan,Sep.2-5,2013

Comparative Study of Segmentation Methods of Rat Sinusoidal Network to Evaluate Nonalcoholic Steatohepatitis for Small Number of Medical Samples

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Journal of Biosciences and Medicines 2022年第11期10卷 192-202页

作者： Masaki Murakishi Hiroto shoji Department of Science and Technology Kwansei Gakuin University Hyogo Japan

Extracting portions of pathology images to determine disease states is a challenging task, and several segmentation approaches have been developed. This study evaluated four well-known methods to classify changes in rat hepatic sinusoidal network morphology in nonalcoholic stetohepatitis were evaluated. The classical methods of morphological transformation (MT), convex hull (CH), and counter extraction (CE), and a machine learning method, U-net, were compared using fractal dimensions as feature quantities. The findings show that MT and CH are more effective than U-net when the number of samples is small, as is usually the case with pathology images. U-net required a large number of images and was the best method in terms of extracting the morphology. When the number of samples is small, such as the case with pathological images, it may be advantageous to use a combination of basic segmentation methods rather than advanced machine learning techniques, such as U-net. The segmentation methods must be carefully chosen depending on the diseases to be discriminated and on the number of samples.

关键词： Segmentation Deep Learning Fractal Dimensions

iStent inject? and cataract surgery for mild-to-moderate primary open angle glaucoma in Japan: a cost-utility analysis

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International Journal of Ophthalmology(English edition) 2022年第6期15卷 954-961页

作者： Ataru Igarashi Kyoko Ishida Nobuyuki shoji Alice Chu Heather Falvey Ru Han Maki Ueyama Yoshie Onishi Unit of Public Health and Preventive Medicine Yokohama City University School of MedicineYokohama 236-0027Japan Ohashi Medical Center Toho UniversityTokyo 153-8515Japan Department of Ophthalmology Kitasato University HospitalKanagawa 252-0375Japan Market Access and Medical Marketing Glaukos SingaporeSingapore 068896Singapore Global Health Economics Glaukos CorpCalifornia 92672USA Health Economics and Outcomes Research Creativ-CeuticalParis 75008France Health Economics and Outcomes Research Creativ-CeuticalTokyo 108-6028Japan

AIM: To evaluate the cost-utility of iStent inject;with cataract surgery vs cataract surgery alone in patients with mild-to-moderate primary open angle glaucoma(POAG) in the Japanese setting from a public payer’s ***: A Markov model was adapted to estimate the cost-utility of iStent inject;plus cataract surgery vs cataract surgery alone in one eye in patients with mild-tomoderate POAG over lifetime horizon from the perspective of Japanese public payer. Japanese sources were used for patients’ characteristics, clinical data, utility, and costs whenever available. Non-Japanese data were validated by Japanese clinical experts. RESULTS: In the probabilistic base case analysis, iStent inject;with cataract surgery was found to be cost-effective compared with cataract surgery alone over a lifetime horizon when using the ￥5 000 000/quality-adjusted life year(QALY)willingness-to-pay threshold. The incremental cost-utility ratio(ICUR) was estimated to be ￥1 430 647/QALY gained and the incremental cost-utility ratio(ICER) was estimated to be ￥12 845 154/blind eye avoided. iStent inject;with cataract surgery vs cataract surgery alone was found to increase costs(￥1 025 785 vs ￥933 759, respectively) but was more effective in increasing QALYs(12.80 vs 12.74) and avoiding blinded eyes(0.133 vs 0.141). The differences in costs were mainly driven by costs of primary surgery(￥279 903 vs ￥121 349). In the scenario analysis from a societal perspective, which included caregiver burden, iStent inject;with cataract surgery was found to dominate cataract surgery ***: The iStent inject;with cataract surgery is a cost-effective strategy over cataract surgery alone from the public payer’s perspective and cost-saving from the societal perspective in patients with mild-to-moderate POAG in Japan.

关键词： iStent inject? glaucoma cataract surgery health-economic model cost-utility