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Shedding new light on the dislocation-mediated plasticity in wurtzite ZnO single crystals by photoindentation

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Journal of Materials Science & Technology 2023年第25期156卷 206-216页

作者： Yan Li Xufei Fang Eita Tochigi Yu Oshima Sena Hoshino Takazumi Tanaka Hiroto Oguri Shigenobu Ogata Yuichi Ikuhara Katsuyuki Matsunaga Atsutomo nakamura Department of Mechanical Science and Bioengineering Osaka University1-3 Machikaneyama-choToyonaka 560-8531Japan Department of Materials and Earth Sciences Technical University of Darmstadt64287 DarmstadtGermany Institute of Industrial Science The University of Tokyo4-6-1 KomabaMeguro-kuTokyo 153-8505Japan PRESTO Japan Science and Technology Agency (JST)4-1-8HonchoKawaguchi-shiSaitama 332-0012Japan Department of Materials Physics Nagoya UniversityFuro-choChikusa-kuNagoya 464-8603Japan Institute of Engineering Innovation The University of Tokyo2-11-16 YayoiBunkyo-kuTokyo 113-8656Japan

Dislocation-mediated plasticity in inorganic semiconductors and oxides has attracted increasing research interest because of the promising mechanical and functional properties tuned by *** this study,we investigated the effects of light illumination on the dislocation-mediated plasticity in hexagonal wurtzite ZnO,a representative third-generation semiconductor material.A(0001)45o off sample was specially designed to preferentially activate the basal slip on(0001)*** types of nanoindentation tests were performed under four different light conditions(550 nm,334 nm,405 nm,and darkness),including low-load(60μN)pop-in tests,high-load(500μN)nanoindentation tests,and nanoindentation creep *** maximum shear stresses at pop-in were found to approximate the theoretical shear strength regardless of the light *** activation volume at pop-ins was calculated to be larger in light than in ***-sectional transmission electron microscope images taken from beneath the indentation imprints showed that all indentation-induced dislocations were located beneath the indentation imprint in a thin-plate shape along one basal slip *** indentation-induced dislocations could spread much deeper in darkness than in light,revealing the suppressive effect of light on dislocation *** analytical model was adopted to estimate the elastoplastic stress field beneath the *** was found that dislocation glide ceased at a higher stress level in light,indicating the increase in the Peierls barrier under light ***,nanoindentation creep tests showed the suppression of both indentation depth and creep rate by *** creep also yielded a larger activation volume in light than in darkness.

关键词： Photoindentation Compound semiconductors Oxides Crystal plasticity Dislocations

Temporal Optimality of a Via-Posture on Trajectory during Sit-to-Stand and Back-to-Sit Movements

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Journal of Biomedical Science and Engineering 2014年第7期7卷 387-396页

作者： hiroshi R. Yamasaki Urara nakamura hiroshi Nagasaki Department of Health and Welfare Tohoku Bunka Gakuen University Sendai Japan Department of Physical Therapy Showa University Yokohama Japan

The purpose of this study was to examine the hypothesis that the minimum angle-jerk with via-point model could account for the temporal consistency of kinematics in sit-to-stand (STS) and back-to-sit (BTS) movements. The positions of bony landmarks on the subjects during the tasks were recorded using a Vicon motion analysis system to yield the angular displacement and position of the center of mass (COM) of a three-link rigid body model in the sagittal plane. Minimum angle-jerk and minimum jerk trajectories with a via-point were computed for joint angle and COM, respectively. Five to six candidate points were selected as the via-point from the measured trajectory based on the separate kinematic events. The results show the optimal angular trajectories using the via-points (via-angles) before the seat-off for STS, and at around the seat-contact for BTS resembles the measured angular trajectories well, indicating that the posture at the via-point was temporally optimal to produce the minimum angle-jerk trajectory for both movements. It is hypothesized that the multi-joint angular patterns during STS and BTS movements were organized to pass through the via-point, namely the via-posture along the minimum angle-jerk trajectory.

关键词： Temporal Optimality Via-Posture Trajectory Sit-to-Stand Back-to-Sit

Pattern sourcebook : around the world : 250 patterns for projects and designs / Shigeki nakamura.

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Pattern sourcebook : around the world : 250 patterns for pro...

Effects of docosahexaenoic acid or arachidonic acid supplementation on the behavior of cardiomyocytes derived from human pluripotent stem cells

2008年

作者： Shigeki nakamura.

Title translated: 图案资料集: 世界各地 Originally published in Japan by MdN Corporation, Tokyo, Japan.

ISBN: (纸本)9781592534968

Title translated: 图案资料集: 世界各地 Originally published in Japan by MdN Corporation, Tokyo, Japan.

关键词： Decoration and ornament Repetitive patterns (Decorative arts)

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BIOCELL 2023年第5期47卷 1095-1106页

作者： MIZUNA YANO KOTA HIROI TETSUYA YUASA KENJI INOUE OSAMU YAMAMOTO TAKAO nakamura DAISUKE SATO ZHONGGANG FENG Graduate School of Science and Engineering Yamagata UniversityYonezawa9928510Japan Faculty of Health Sciences Japan Healthcare UniversitySapporo0620053Japan

Background:Human heart changes its energetic substrates from lactate and glucose to fatty acids during the neonatal *** the lack of fatty acids in media for the culture of cardiomyocytes derived from human pluripotent stem cells(hiPS-CM),researchers have supplemented mixtures of fatty acids to hiPS-CM and reported the enhancement in the maturation of *** our previous studies,we separately supplemented two polyunsaturated fatty acids(PUFAs),docosahexaenoic acid(DHA)or arachidonic acid(AA),to rat fetal cardiomyocytes and found that the supplementations upregulated the expressions of mRNAs for cardiomyocyte differentiation,fatty acid metabolism,and cellular *** enhancement in cellular contractility was attributed to the improvement in intercellular connection rather than a direct enhancement of the contractile ***:This study reports the successive results of the effects of DHA or AA supplementation on *** addition to the contractile force and mRNA measurements used in the previous study,we further investigated the effect of different cellular aggregations on the contractile force output by means of finite element analysis,measured glucose and fatty acids metabolites,and assessed cTNT and MLC2v expressions through immunofluorecsence ***:It showed that the sole supplementation of albumin-conjugated DHA or AA can be taken up by hiPS-CM without other uptake-enhancing factors,and the supplementations may activate the CD36_ERRγmetabolic *** or AA supplementation increased the cellular contractile ratio on collagen gels and AA supplementation stimulated hiPS-CM aggregation to form cellular *** enhancement effect on the hiPS-CM contractile force was modest since the increase in contractile force was not *** supplementation was more effective than DHA supplementation because it significantly upregulated mRNA expressions of P300 and ***,finite element analysis showed that the formati

关键词： Human iPS cells Cardiomyocytes Polyunsaturated fatty acid mRNA expression Contractility Fatty acid metabolism

Pattern sourcebook : Chinese style : 250 patterns for projects and designs / Shigeki nakamura.

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Pattern sourcebook : Chinese style : 250 patterns for projec...

The relationship between formate adsorption energy and electronic properties: A first principles density functional theory study

2008年

作者： Shigeki nakamura.

Title translated: 图案资料集: 中国风格 Originally published in Japan by MdN Corporation, Tokyo, Japan.

ISBN: (纸本)9781592534975

Title translated: 图案资料集: 中国风格 Originally published in Japan by MdN Corporation, Tokyo, Japan.

关键词： Decoration and ornament China.

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Science China Chemistry 2009年第9期52卷 1427-1433页

作者： MORIKAWA Yoshitada nakamura Junji The Institute of Scientific and Industrial Research (ISIR) Osaka University Research Institute for Computational Sciences (RICS) National Institute of Advanced Industrial Science and Technology (AIST) Institute of Materials Science University of Tsukuba

First principles density functional theory calculations have been performed for the chemisorption of formate adsorption on some metal surfaces. For the most stable adsorption site of short-bridge, the calculated formate adsorption energy follows the order of Au(110) < Ag(110) < Cu(110) < Pd(110) < Pt(110) < Ni(110) < Rh(110) < Fe(100) < Mo(100), and a clear linear correlation exists between the adsorption energy and the corresponding heat of formation of metal oxides. Moreover, it has been found that the formate adsorption energy for the transition metals can be correlated well with its d-band center (εd), and the IB Group metals can be described by the coupling matrix element square (Vad2).

关键词： formate metal DFT-GGA slab model adsorption energy d-band center

Improved Model for Soil as a Two-Phase Mixture Based on Smoothed Particle Hydrodynamics (SPH)

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Journal of Applied Mathematics and Physics 2014年第12期2卷 1053-1060页

作者： Kousuke nakamura Tomoaki Satomi hiroshi Takahashi Graduate School of Environmental Studies Tohoku University Sendai Japan

It is desired to resolve soil contamination with reduced costs. “Insoluble treatment” is a soil improvement method for heavy metal containing soil, which uses soil mixers to mix soil and soil improvement liquid agents. To reduce the costs of this method, soil mixers have to be optimized. However, it is not achieved due to the lack of theoretical knowledge on mixing solid with liquid. Therefore, a numerical model to simulate the dynamic behavior of solid and liquid is on the development in this study using Smoothed Particle Hydrodynamics (SPH) method. To validate the numerical model, several experiments were carried out and numerically reproduced. The comparisons of the results showed that the numerical model replicated a liquid flow with an error rate of 2.1% and a seepage flow with an error rate up to 26.1%. Especially, the water distribution in the soil pores was highly improved with absolute gaps in volumetric water content up to 4.4% in the porosity range of 10% - 90%. For the water absorption into dry sand, the simulation result became more realistic by concerning soil suction.

关键词： Soil Improvement Water Absorption Test Saturated and Unsaturated Soil Smoothed Particle Hydrodynamics

Identification of shared and unique gene families associated with oral clefts

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International Journal of Oral Science 2017年第2期9卷 104-109页

作者： Noriko Funato Masataka nakamura Department of Signal Gene Regulation Research Center for Medical and Dental SciencesTokyo Medical and Dental University1-5-45 YushimaBunkyo-kuTokyoJapan

Oral clefts, the most frequent congenital birth defects in humans, are multifactorial disorders caused by genetic and environmental factors. Epidemiological studies point to different etiologies underlying the oral cleft phenotypes, cleft lip(CL),CL and/or palate(CL/P) and cleft palate(CP). More than 350 genes have syndromic and/or nonsyndromic oral cleft associations in humans. Although genes related to genetic disorders associated with oral cleft phenotypes are known, a gap between detecting these associations and interpretation of their biological importance has remained. Here, using a gene ontology analysis approach, we grouped these candidate genes on the basis of different functional categories to gain insight into the genetic etiology of oral clefts. We identified different genetic profiles and found correlations between the functions of gene products and oral cleft phenotypes. Our results indicate inherent differences in the genetic etiologies that underlie oral cleft phenotypes and support epidemiological evidence that genes associated with CL/P are both developmentally and genetically different from CP only, incomplete CP, and submucous CP. The epidemiological differences among cleft phenotypes may reflect differences in the underlying genetic causes. Understanding the different causative etiologies of oral clefts is important as it may lead to improvements in diagnosis, counseling, and prevention.

关键词： cleft palate epidemiology gene ontology mutations soft palate syndrome

Neoadjuvant chemotherapy for locally advanced cervical cancer

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Chinese Journal of Cancer Research 2016年第2期28卷 235-240页

作者： Takashi Iwata Azumi Miyauchi Yukako Suga hiroshi Nishio Masaru nakamura Akiko Ohno Nobumaru Hirao Tohru Morisada Kyoko Tanaka Hiroki Ueyama Hidemichi Watari Daisuke Aoki Department of Obstetrics and Gynecology Keio University School of Medicine Department of Obstetrics and Gynecology Hokkaido University Graduate School of Medicine

Neoadjuvant chemotherapy followed by surgery （NCS） has not been fully evaluated clinically. Currently, the main regimen of neoadjuvant chemotherapy （NAC） used in NCS includes cisplatin. The antitumor effects of NAC reduce lymph node metastasis and the tumor diameter in patients prior to surgery, and this can reduce the number of high risk patients who require postoperative radiation therapy. Many randomized controlled trials （RCTs） have examined the long-term prognosis of NCS compared to primary surgery, but the utility of NCS remains uncertain. The advent of concurrent chemoradiotherapy （CCRT） has markedly improved the outcome of radiotherapy （RT）, and CCRT is now used as a standard method in many cases of advanced bulky cervical cancer. NCS gives a better treatment outcome than radiation therapy alone, but it is important to verify that NCS gives a similar or better outcome compared to CCRT.

关键词： Neoadjuvant chemotherapy (NAC) cervical cancer