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Metal matrix nanocomposites in tribology: Manufacturing, performance, and mechanisms

Friction 2022年第10期10卷 1596-1634页

作者： Shuaihang PAN Kaiyuan JIN Tianlu WANG Zhinan ZHANG Long ZHENG Noritsugu umehara Department of Mechanical and Aerospace Engineering University of California Los Angeles(UCLA)Los AngelesCA 90095USA Physical Intelligence Department Max Planck Institute for Intelligent SystemsStuttgart 70569Germany Stake Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Bionic Engineering(Ministry of Education) College of Biological and Agricultural EngineeringJilin UniversityChangchun 130022China Micro-Nano Mechanical Science Laboratory Department of Micro-Nano Mechanical Science and EngineeringGraduate School of EngineeringNagoya UniversityChikisa-ku Furo-choNagoyaAichi 464-8601Japan

Metal matrix nanocomposites(MMNCs)become irreplaceable in tribology industries,due to their supreme mechanical properties and satisfactory tribological ***,due to the dual complexity of MMNC systems and tribological process,the anti-friction and anti-wear mechanisms are unclear,and the subsequent tribological performance prediction and design of MMNCs are not easily possible:A critical up-to-date review is needed for MMNCs in *** review systematically summarized the fabrication,manufacturing,and processing techniques for high-quality MMNC bulk and surface coating materials in ***,important factors determining the tribological performance(mainly anti-friction evaluation by the coefficient of friction(CoF)and anti-wear assessment with wear rate)in MMNCs have been investigated thoroughly,and the correlations have been analyzed to reveal their potential coupling/synergetic roles of tuning tribological behavior of *** importantly,this review combined the classical metal/alloy friction and wear theories and adapted them to give a(semi-)quantitative description of the detailed mechanisms of improved anti-friction and anti-wear performance in *** guarantee the universal applications of these mechanisms,their links with the analyzed influencing factors(e.g.,loading forces)and characteristic features like tribo-film have been *** approach forms a solid basis for understanding,predicting,and engineering MMNCs’tribological behavior,instead of pure phenomenology and experimental ***,the pathway to achieve a broader application for MMNCs in tribo-related fields like smart materials,biomedical devices,energy storage,and electronics has been concisely discussed,with the focus on the potential development of modeling,experimental,and theoretical techniques in MMNCs’tribological *** general,this review tries to elucidate the complex tribo-performances of MMNCs in a fundamentally universal yet straightfor

关键词： metal matrix nanocomposites nanophases tribology manufacturing processes anti-wear performance strengthening effects anti-wear mechanisms

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Sensitive voltammetric and amperometric responses of respiratory toxins at hemin-adsorbed carbon-felt

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Journal of Environmental Sciences 2013年第6期25卷 1055-1062页

作者： yasushi Hasebe Yue Wang Department of Life Science and Green Chemistry Faculty of EngineeringSaitama Institute of Technology School of Chemical Engineering University of Science and Technology Liaoning

A hemin [iron-Fe（III） protoporphyrin IX chloride] was adsorbed onto a carbon-felt （CF）, which is a microelectrode ensemble of micro carbon fiber （ca. 7 ~tm diameter）. The resulting hemin-adsorbed-CF （hemin-CF） showed a well-defined redox wave based on the hemin- Fe（III）/Fe（II） redox process with the formal potential of -0.225 V vs. Ag/AgC1 in deoxygenated phosphate]citrate buffer solution （0.1 mol/L, pH 5.0）. The apparent heterogenous electron transfer rate constant was estimated to be 8.6 sec-1. In air-saturated electrolyte solution, the hemin-CF exhibited an excellent electrocatalytic activity for the reduction of dioxygen （O2）. This activity was reversibly inhibited by respiratory toxins such as cyanide and azide, which bind sixth coordination position of iron active center of hemin. The electrocatalytic Oz reduction current at the hemin-CF was modulated by the toxins in a concentration-depending manner. Based on the relationship between the %inhibition and the toxin concentration, apparent inhibition constants of cyanide and azide were evaluated to be 4.52 and 1.98 Ixmol/L, respectively. When the hemin-CF was used as a working electrode unit of the CF-based electrochemical flow-through detector with air-saturated carrier, the injection of the azide induced peak-shape current responses, which allowed rapid and continuous flow-amperometric determination of azide with high sensitivity.

关键词： respiratory toxin hemin carbon-felt cyanide azide voltammetry amperometry

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Estimating reflectance and shape of objects from a single cartoon-shaded image

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Computational Visual Media 2017年第1期3卷 21-31页

作者： Hideki Todo yasushi Yamaguchi Tokyo University of Technology The University of Tokyo

Although many photorealistic relighting methods provide a way to change the illumination of objects in a digital photograph, it is currently difficult to relight digital illustrations having a cartoon shading style. The main difference between photorealistic and cartoon shading styles is that cartoon shading is characterized by soft color quantization and nonlinear color variations that cause noticeable reconstruction errors under a physical reflectance assumption, such as Lambertian reflection. To handle this non-photorealistic shading property, we focus on shading analysis of the most fundamental cartoon shading technique. Based on the color map shading representation, we propose a simple method to determine the input shading as that of a smooth shape with a nonlinear reflectance property. We have conducted simple ground-truth evaluations to compare our results to those obtained by other approaches.

关键词： non-photorealistic rendering cartoon shading relighting quantization

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Electropolymerized poly(Toluidine Blue)-modified carbon felt for highly sensitive amperometric determination of NADH in flow injection analysis

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Journal of Environmental Sciences 2011年第6期23卷 1050-1056页

作者： yasushi Hasebe Yue Wang Kazuya Fukuoka Department of Life Science and Green Chemistry Saitama Institute of Technology 1690 Fusaiji Fukaya Saitama 369-0293 Japan Department of Materials Science and Engineering Graduate School of Engineering Saitama Institute of Technlogy 1690 Fusaiji Fukaya Saitama 369-0293 Japan School of Chemical Engineering University of Sciences and Technology Anshan 114044 China

Poly（pheniothiazine） films were prepared on a porous carbon felt（CF） electrode surface by an electrooxidative polymerization of three phenothiazine derivatives（i.e.,Tthionine（TN）,Toluidine Blue（TB） and Methylene Blue（MB）） from 0.1 mol/L phosphate buffer solution（pH 7.0）.Among the three phenothiazies,the poly（TB） film-modified CF exhibited an excellent electrocatalytic activity for the oxidation of nicotinamide adenine dinucleotide reduced form（NADH） at ＋0.2 V ***/*** poly（TB） film-modified CF was successfully used as working electrode unit of highly sensitive amperometric flow-through detector for *** peak currents（peak heights） were almost unchanged,irrespective of a carrier flow rate ranging from 2.0 to 4.1 mL/min,resulting in the measurement of NADH（ca.30 samples/hr） at 4.1 mL/*** peak current responses of NADH showed linear relationship over the concentration range from 1 to 30 μmol/L（sensitivity：0.318 μA/（μmol/L）;correlation coefficient：0.997）.The lower detection limit was found to be 0.3 μmol/L（S/N = 3）.

关键词： poly(phenothiazine) Toluidine Blue electropolymerization carbon felt NADH flow injection analysis

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Natural Image Matting with Attended Global Context

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Journal of Computer Science & Technology 2023年第3期38卷 659-673页

作者：张億一牛力 yasushi Makihara 张健夫赵维杰 yasushi Yagi 张丽清 MoE Key Lab of Artificial Intelligence Department of Computer Science and EngineeringShanghai Jiao Tong University Shanghai 200240China Department of Intelligent Media Institute of Scientific and Industrial ResearchOsaka UniversityOsaka 565-0871Japan

Image matting is to estimate the opacity of foreground objects from an image. A few deep learning based methods have been proposed for image matting and perform well in capturing spatially close information. However, these methods fail to capture global contextual information, which has been proved essential in improving matting performance. This is because a matting image may be up to several megapixels, which is too big for a learning-based network to capture global contextual information due to the limit size of a receptive field. Although uniformly downsampling the matting image can alleviate this problem, it may result in the degradation of matting performance. To solve this problem, we introduce a natural image matting with the attended global context method to extract global contextual information from the whole image, and to condense them into a suitable size for learning-based network. Specifically, we first leverage a deformable sampling layer to obtain condensed foreground and background attended images respectively. Then, we utilize a contextual attention layer to extract information related to unknown regions from condensed foreground and background images generated by a deformable sampling layer. Besides, our network predicts a background as well as the alpha matte to obtain more purified foreground, which contributes to better qualitative performance in composition. Comprehensive experiments show that our method achieves competitive performance on both Composition-1k and the *** benchmark quantitatively and qualitatively.

关键词： image matting global context deformable sampling

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Hybrid image of three contents

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Visual Computing for Industry,Biomedicine,and Art 2020年第1期3卷 31-38页

作者： Peeraya Sripian yasushi Yamaguchi SIT Research Laboratory Shibaura Institute of TechnologyRoom#04R313-7-5 ToyosuKoto-kuTokyo 135-8548Japan The University of Tokyo Bldg.#15Room#505A3-8-1KomabaMeguro-kuTokyo 153-8902Japan

A hybrid image allows multiple image interpretations to be modulated by the viewing ***,it can be constructed by combining the low and high spatial frequencies of two different *** original hybrid image synthesis was limited to similar shapes of source images that were aligned in the edges,e.g.,faces with a different expression,to produce an effective double image *** our previous work,we proposed a noiseinserted method for synthesizing a hybrid image from dissimilar shape images or unaligned *** this work,we propose a novel method for adding an image to be seen from a middle viewing *** middlefrequency(MF)image is extracted by a special bandpass filter,which generates ringing while extracting only specified frequency *** this method,the middle frequency should be perceived as a meaningless pattern when viewed from a far distance and close up.A parameter tuning experiment was performed to determine the suitable cutoff frequencies for designing the filter for the MF *** found that ringings of a suitable size could be used to make the middle frequency less noticeable when seen from far away.

关键词： Hybrid image Contrast sensitivity Frequency filtering Scale-space

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Short-and long-term outcome of interferon therapy for chronic hepatitis B infection

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World Journal of Gastroenterology 2014年第37期20卷 13284-13292页

作者： yasushi Seo Yoshihiko Yano Division of Gastroenterology Department of Internal MedicineKobe University Graduate School of Medicine Internal Medicine and Ophthalmology Clinic

Hepatitis B virus (HBV) infection is a serious clinical problem worldwide. Conventional interferon (IFN)-α has been approved for the treatment of chronic hepatitis B (CHB). Short-term studies have demonstrated that IFN-based therapy is moderately effective in inducing the loss of hepatitis e antigen (HBeAg) or seroconversion (30%-40%) in HBeAg-positive patients and also produces sustained HBV DNA suppression (20%-30%) in HBeAg-negative patients. Many studies have reported a correlation between the HBV genotype and response to IFN treatment. The highest response rate to IFN treatment was found in patients infected with HBV genotype A, followed by HBV genotypes B, C, and D. The long-term effect of IFN-α on CHB has not yet been elucidated. The ability of IFN-α treatment to prevent new cirrhosis, complications associated with cirrhosis, and development of hepatocellular carcinoma (HCC) is controversial. The beneficial effect of IFN-α treatment in reducing the development of HCC has mainly been observed in treatment responders who already have cirrhosis. These inconsistent findings may be attributed to the inevitable limitations of comparisons across studies, including differences in the baseline characteristics of the study and the moderate suppression of HBV replication by IFN-α relative to nucleoside/nucleos(t)ide analogs.

关键词： Chronic hepatitis B Hepatitis B virus Interferon α Long-term outcome Hepatocellular carcinoma

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World Journal of Clinical Cases 2022年第34期10卷 12617-12622页

作者： Mayuki Kizawa yasushi Iwasaki Department of Pathology Tokai Central HospitalKakamigahara 504-8601Japan Bulletin of The Institute for Medical Science of Aging Aichi Medical UniversityNagakute City 480-1195Japan

BACKGROUND Although coronavirus disease 2019(COVID-19)vaccines have been effective in controlling the COVID-19 pandemic,a variety of post-vaccination neurological complications have been reported ***β-related angiitis(ABRA)is a rare neurological *** underlying cause of ABRA is unknown,but several studies suggest that it is caused by an excessive immune response to amyloid-βdeposited in blood *** addition,limited attention has been paid to potential triggers of ABRA,such as infection or *** SUMMARY We report a case of ABRA that developed 2 wk after COVID-19 vaccination.A 75-year-old woman developed a frontal headache after receiving a second dose of COVID-19 BNT162b2 vaccine(Pfizer-BioNTech).Diffusion-weighted magnetic resonance imaging(DW-MRI)of the head showed abnormal hyperintensity,suggesting cerebral infarctions in the left parietal and occipital *** diagnosed her condition as ABRA based on a brain *** administered steroid pulse therapy and the patient’s symptoms and DW-MRI abnormalities *** case had a good outcome due to prompt diagnosis and *** We report a case of ABRA that may have been triggered by COVID-19 vaccination.

关键词： Amyloidβ-related angiitis COVID-19 Neurological complications Vaccination Case report

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Characterizing mouse male germ cell-specific actin capping protein α3 （CPα3）： dynamic patterns of expression in testicular and epididymal sperm

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Asian Journal of Andrology 2008年第5期10卷 711-718页

作者： Keizo Tokuhiro yasushi Miyagawaq Hiromitsu Tanaka TANAKA Project Center for Advanced Science and Innovation Osaka University 3-1 Yamadaoka Osaka 565-0871 Japan Department of Urology Osaka University Graduate School of Medicine Osaka 565-0871 Japan Department of Science for Laboratory Animal Experimentation Research Institute for Microbial Disease Osaka University 3-1 Yamadaoka Suita Osaka 565-0871 Japan Faculty of Pharmaceutical Sciences Nagasaki International University Sasebo Nagasaki 859-3298 Japan

Aim： To characterize mouse capping protein α3 （CPα3） during spermatogenesis and sperm maturation. Methods： We produced rat anti-CPα3 antiserum and examined the expression of CPα3 in various mouse tissues using Western blot analysis and the localization of CPα3 in testicular and epididymal sperm using immunohistochemical analyses. We also examined how the localization of CPα3 and β-actin （ACTB） in sperm changed after the acrosomal reaction by performing immunohistochemical analyses using anti-CPα3 antiserum and anti-actin antibody. Results： Western blot analysis using specific antiserum revealed that CPα3 was expressed specifically in testes. Interestingly, the molecular weight of CPα3 changed during sperm maturation in the epididymis. Furthermore, the subcellular localization of CPα3 in sperm changed dynamically from the flagellum to the post-acrosomal region of the head during epididymal maturation. The distribution of ACTB was in the post-acrosomal region of the head and the flagellum. After inducing the acrosomal reaction, the CPα3 and ACTB localization was virtually identical to the localization before the acrosomal reaction. Conclusion： CPα3 might play an important role in sperm morphogenesis and/or sperm function.

关键词： acrosome male germ cell-specific spermatogenesis testis

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Effects of Kampo medicine, Keishi-ka Shakuyaku-to (TJ-60) on alteration of diacylglycerol metabolism in gastrointestinal smooth muscle of diabetic rats

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Acta Pharmacologica Sinica 2002年第12期23卷 120-127页

作者： NOBE Koji,MOMOSE Kazutaka,SAKAI yasushi Showa University 1-5-8 Hatanodai Shinagawa-ku Tokyo 142-8555 Japan Division of Physiology Department of Occupational Therapy Shool of Nursing and Rehabilitation Sciences Showa University 1865 Taka-Ichiba Department of Pharmacology Midori-ku Yokohama Kanagawa 226-8555 Japan School of Pharmaceutical Sciences Showa University 1-5-8 Hatanodai Shinagawa-ku Tokyo 142-8555 Japan Department of Pharmacology School of Pharmaceutical Sciences

AIM: To examine the effects of Kampo medicine, Keishi-ka-Shakuyaku-to (TJ-60) on the signal transduction in diabetic gastrointestinal dysfunction. METHODS: Experimental diabetic models were prepared using streptozotocin (STZ)-treated Wistar rats. Randomly selected STZ rats were treated with insulin (12 U·kg-1·d-1) or TJ-60 (1% of food intake). Diacylglycerol (DG) and DG kinase activities were quantified in isolated aortic smooth muscle tissue. RESULTS: One of the key element of the Pi-turnover, DG kinase activity in resting state in gastric smooth muscle was significantly increased compared to the control value, and carbachol (CCh)-induced response was not detectable, but it was detected in the control rats. On the other hand resting activity in ileum did not differ from the control, but the CCh-induced responses were suppressed. Treatment with TJ-60 indicated resistant effects for the alteration of DG kinase activities in diabetic intestinal tissues. In order to reveal the mechanism of the effects, t

关键词： diabetes mellitus Keshi-ka-Shakuyaku-to gastrointestinal smooth muscle herbal medicine muscle contraction diacylglycerol kinase signal transduction

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