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Journal of Materials Science & Technology 2014年第8期30卷 736-742页

作者： Hansang Kwon Marc Leparoux akira Kawasaki Department of Materials System Engineering Pukyong National University365 Sinsenro608-759 BusanKorea Empa Swiss Federal Laboratories for Materials Science and TechnologyAdvanced Materials ProcessingFeuerwerkerstrasse 39CH-3602 ThunSwitzerland Department of Materials Processing Engineering Graduate School of EngineeringTohoku University980-8579 SendaiJapan

Functionally graded（FG） carbon nanotubes（CNT） and nano-silicon carbide（nSiC） reinforced aluminium（Al）matrix composites have been successfully fabricated using high-energy ball milling followed by solid-state spark plasma sintering *** CNTs were well-dispersed in the Al particles using the nSiC as a solid mixing *** different types of multi-walled CNTs were used to add different amounts of CNTs in the same *** ball milled Al—CNT—nSiC and Al—CNT powder mixtures were fully densified and demonstrated good adhesion with no serious microcracks and pores within an FG multilayer *** layer contained different amounts of the CNTs,and the nSiC additions showed different microstructures and *** is possible to control the characteristics of the FG multilayer composite through the efficient design of an Al—CNT—nSiC gradient *** concept offers a feasible approach for fabricating the dualnanoparticulate-reinforced Al matrix nanocomposites and can be applied to other scenarios such as polymer and ceramic systems.

关键词： Carbon nanotubes(CNT) Silicon carbide High-energy ball milling Spark plasma sintering(SPS) Functionally graded materials(FGM)

Overseas immigration of fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae), invading Korea and Japan in 2019

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Insect Science 2022年第2期29卷 505-520页

作者： Ming-Fei Wu Guo-Jun Qi Hui Chen Jian Ma Jie Liu Yu-Ying Jiang Gwan-Seok Lee akira Otuka Gao Hu College of Plant Protection Nanjing Agricultural UniversityNanjing210095 China Guangdong Provincial Key Laboratory of High Technology for Plant Protection/Plant Protection Research Institute Guangdong Academy of Agricultural SciencesGuangzhou510640 China Division of Pest Forecasting China National Agro-Tech Extension and Service CenterBeijing100026 China Department of Agro-food Safety and Crop Protection National Institute of Agricultural SciencesWanju55365 Korea Institute of Agricultural Machinery National Agriculture and Food Research OrganizationTsukuba3058517 Japan

The fall armyworm(FAW),Spodoptera frugiperda(***),spread rapidly in Africa and Asia recently,causing huge economic losses in crop *** armyworm caterpillars were first detected in South Korea and Japan in June ***,the migration timing and path for FAW into the countries were estimated by a trajectory simulation approach implementing the insect's flight *** result showed that FAWs found in both South Korea and Japan were estimated to have come from eastern China by crossing the Yellow Sea or the East China Sea in 10–36 h in three series of *** the first series,FAW moths that arrived on Jeju Island during 22–24 May were estimated to be from Zhejiang,Anhui and Fujian Provinces after 1–2 nights’*** the second series,it was estimated that FAW moths landed in southern Korea and Kyushu region of Japan simultaneously or successively during 5–9 June,and these moths mostly came from Guangdong and Fujian *** FAW moths in the third series were estimated to have immigrated from Taiwan Province onto Okinawa Islands during 19–24 *** these migrations,southwesterly low-level jets extending from eastern China to southern Korea and/or Japan were observed in the northwestern periphery of the western Pacific Subtropical *** results,for the first time,suggested that the overseas FAW immigrants invading Korea and Japan came from eastern and southern *** study is helpful for future monitoring,early warning and the source control of this pest in the two countries.

关键词： Asian migration arena atmospheric circulation Spodoptera frugiperda trajectory analysis windbome insect migration

Activities of nicotinic acetylcholine receptors modulate neurotransmission and synaptic architecture

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Neural Regeneration Research 2014年第24期9卷 2128-2131页

作者： akira Oda Hidekazu Tanaka CNS Drug Discovery Unit Pharmaceutical Research Division Takeda Pharmaceutical Company Limited Laboratory of Pharmacology Department of Biomedical Sciences College of Life Sciences Ritsumeikan University

The cholinergic system is involved in a broad spectrum of brain function, and its failure has been implicated in Alzheimer＇s disease. Acetylcholine transduces signals through muscarinic and nicotinic acetylcholine receptors, both of which influence synaptic plasticity and cognition. However, the mechanisms that relate the rapid gating of nicotinic acetylcholine receptors to persistent changes in brain function have remained elusive. Recent evidence indicates that nicotinic acetylcholine receptors activities affect synaptic morphology and density, which result in persistent rearrangements of neural connectivity. Further investigations of the relationships between nicotinic acetylcholine receptors and rearrangements of neural circuitry in the central nervous system may help understand the pathogenesis of Alzheimer＇s disease.

关键词： cholinergic system nicotinic acetylcholine receptors (nAChRs) Alzheimer's disease (AD) synaptic transmission synaptic plasticity synaptic morphology dendritic spine remodeling cognition

Optimization of the gain in Yb^(3+)-doped cubic laser crystals of 99.99% purity

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Journal of Rare Earths 2009年第4期27卷 616-618页

作者： Georges Boulon Yannick Guyot akira Yoshikawa Physical Chemistry of Luminescent Materials University Claude Berna rd/Lyon1 UMR 5620 CNRS Bt.A.Kastler Domaine Scientifique de La Doua 69622 Villeurbanne France IMRAM Tohoku University 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan

This was an outlook on the prediction of the infrared laser potentiality from concentration dependences of the 2F5/2 experimental decay time in Yb3＋-doped solid-state crystals mainly on cubic crystals with 99.99% pur... 详细信息

关键词： ytterbium fluoride garnet sesquioxide laser crystals concentration quenching self trapping lifetime

Luminescence of Er^(3+) in Oxyfluoride Transparent Glass-Ceramics

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Journal of Rare Earths 2006年第6期24卷 699-705页

作者： akira Ueda Steven H Morgan Richard Mu Department of Physics Fisk University NashvilleTN 37208 USA

Erbium doped silicate, germanate, and tellurium-germanate oxyfluoride glasses were prepared in a bulk form. Through appropriate heat treatment of the as-prepared glasses, transparent glass-ceramics （TGCs） were obtained with the formation of β-PbF2：Er^3＋ nanocrystals in the glass matrix were confirmed by X-ray ***-defined diffraction peaks were observed in the samples after heat-treatment. The average crystal diameter of these precipitated crystals from full-width at half-maximum （FWHM） of the diffraction peak was estimated to be between 8 and 13 nm. Optical absorption, photoluminescence, and upconversion luminescence were measured on as-prepared glass and glass-ceramics. Luminescence spectra in the TGC samples revealed well-resolved, sharp stark-splitting peaks, which indicates that a majority of Er^3＋ ions has been incorporated into the crystalline phase of the nanocrystals. The intensity of the visible and near infrared luminescence mostly increases in TSG compared to that in the as-prepared glass. In 1.53 μm absorption and emission bands, the maximum absorption peak is blue-shifted from 1531 to 1507 nm, whereas the maximum emission peak is redshifted from 1535 to 1543 nm in TGC, as compared with that in glass. The bandwidth at half-maximum （BWHM） of the emission band is significantly broader in TGC than in glass, which is beneficial to the erbium-doped fiber amplifier （EDFA）. Upconversion luminescence was measured using 800 nm near-infrared light excitation. Drastically increased upconversion 1 was observed from the TGC as compared to that from their corresponding as-prepared glasses. In addition to a strong green emission centered at 545 nm because of ^4S3/2→^4I15/2 transition and a weaker red emission centered at 662 nm because of ^4F9/2→^4I15/2 transition, generally seen from the Er^3＋ doped glasses, two violet emissions centered at 410 nm because of ^2H9/2→^4I15/2 transition and centered at 379 nm because of ^4G11/2→^4I15/2 transition were also o

关键词： luminescence transparent glass-ceramics rare earths

Analysis and control of vibration of ropes in a high-rise elevator under earthquake excitation

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Earthquake Engineering and Engineering Vibration 2019年第2期18卷 447-460页

作者： Thuan Xuan Nguyen Nanako Miura akira Sone Faculty of Mechanical Engineering Kyoto Institute Technology Matsugasaki

In this research, the vibration of elevator ropes, including the main rope and compensation rope are investigated simultaneously in a high-rise elevator system under earthquake excitation. Moreover, the paper presents a new control method to restrain the sway of both ropes. This study considers varying rope lengths during elevator operation which cause other system parameters such as natural frequency, and damping ratio to be time-variant variables. The dynamics of the ropes are analyzed by solving the governing non-stationary, nonlinear equation numerically. In order to mitigate the vibration of ropes in several motion conditions, particularly upwards movement, downward movement, stopped at the lowest position, and stopped at the highest position, an active equipment is installed at the compensation sheave. The stability of the system using the controller is analyzed at four states: without disturbance and static car, without disturbance and mobile car, including disturbance and static car, and including disturbance and mobile car. The efficiency of the controller used for dampening the vibration of elevator ropes is validated by numerical simulation results.

关键词： elevator ropes high-rise elevator vibration controller stability

Fault Detection System Design for Actuator of a Thermal Process Using Operator Based Approach

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自动化学报 2010年第4期36卷 580-585页

作者： DENG Ming-Cong INOUE akira EDAHIRO Kazunori Graduate School of Natural Science and Technology Okayama University Okayama 700-8530 Japan

This paper proposes an operator based fault detection method for an actuator fault of an aluminum plate thermal process with input constraints. Operator-based robust right coprime factorization(RCF)approach is utilized in this method. After developing a mathematical model of the thermal process,a robust tracking operator system is designed for the process with input constraints. Following this, design of the fault detection system is given by using operator-based robust RCF approach. Finally, experiment is conducted to support the proposed design method

关键词：自动化系统稳定性 RCF DIO

A Novel Sterilization Method Using Pulsed Discharge Plasma

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Chinese Physics Letters 1998年第1期15卷 41-42页

作者：王锡录 akira Mizuno Shijin Katsura Department of Ecological Engineering Toyohashi University of TechnologyTempaku-choToyohashi441Japan Institute of Electrostatics Northeast Normal UniversityChangchun 130024

Pulsed discharge plasma(PDP)has been used to kill bacteria and the curves of the survival rate of bacteria against treatment time are *** structural change in the cell membrane is caused by PDP and the cell is thus **... 详细信息

关键词： PDP Plasma treatment

Sequential expression of miR-221-3p and miR-338-3p in Schwann cells as a therapeutic strategy to promote nerve regeneration and functional recovery

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Neural Regeneration Research 2023年第3期18卷 671-682页

作者： Li-Li Wen Tian-Hao Yu Yi-Zhan Ma Xiao-Yan Mao Tian-Rang Ao Rabia Javed Hirotomo Ten akira Matsuno Qiang Ao Department of Tissue Engineering School of Intelligent MedicineChina Medical UniversityShenyangLiaoning ProvinceChina The VIP Department School and Hospital of StomatologyLiaoning Provincial Key Laboratory of Oral DiseasesChina Medical UniversityShenyangLiaoning ProvinceChina Department of Oncology Cancer HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijingChina Department of Neurosurgery Teikyo University School of MedicineTokyoJapan NMPA Key Laboratory for Quality Research and Control of Tissue Regenerative Biomaterial&Institute of Regulatory Science for Medical Device&National Engineering Research Center for Biomaterials Sichuan UniversityChengduSichuan ProvinceChina

The functional properties of endogenous Schwann cells(SCs)during nerve repair are *** the functional properties of SCs at different stages of nerve repair may have therapeutic benefit in improving the repair of damaged *** studies showed that miR-221-3p promotes the proliferation and migration of SCs,and miR-338-3p promotes the myelination of *** this study,we established rat models of sciatic nerve injury by bridging the transected sciatic nerve with a silicone *** injected a miR-221 lentiviral vector system together with a doxycycline-inducible Tet-On miR-338 lentiviral vector system into the cavity of nerve conduits of nerve stumps to sequentially regulate the biological function of endogenous SCs at different stages of nerve *** found that the biological function of SCs was sequentially regulated,the diameter and density of myelinated axons were increased,the expression levels of NF200 and myelin basic protein were increased,and the function of injured peripheral nerve was improved using this *** Target Prediction Database prediction,Nanopore whole transcriptome sequencing,quantitative PCR,and dual luciferase reporter gene assay results predicted and verified Cdkn1b and Nrp1 as target genes of miR-221-3p and miR-338-3p,respectively,and their regulatory effects on SCs were confirmed in *** conclusion,here we established a new method to enhance nerve regeneration through sequential regulation of biological functions of endogenous SCs,which establishes a new concept and model for the treatment of peripheral nerve *** findings from this study will provide direct guiding significance for clinical treatment of sciatic nerve injury.

关键词： cdkn1b miR-221 miR-338 miRNA nerve regeneration Nrp1 peripheral nerve injury regulation Schwann cells sequential expression

Hydrogel photocatalysts for efficient energy conversion and environmental treatment

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Frontiers in Energy 2021年第3期15卷 577-595页

作者： Wenwei LEI Norihiro SUZUKI Chiaki TERASHIMA akira FUJISHIMA School of Environmental and Chemical Engineering Yanshan UniversityQinhuangdao 066004ChinaPhotocatalysis International Research CenterTokyo University of Science2641 YamazakiNodaChiba 278-8510Japan Photocatalysis International Research Center Tokyo University of Science2641 YamazakiNodaChiba 278-8510Japan

Photocatalysts have attracted great research interest owing to their excellent properties and potential for simultaneously addressing challenges related to energy needs and environmental *** particles need to be in contact with their respective media to exhibit efficient photocatalytic ***,it is difficult to separate nanometer-sized photocatalytic materials from reaction media later,which may lead to secondary pollution and a poor recycling *** photocatalysts with a three-dimensional(3D)network structures are promising support materials for photocatalysts based on features such as high specific surface areas and adsorption capacities and good environmental *** this review,hydrogel photocatalysts are classified into two different categories depending on their elemental composition and recent progresses in the methods for preparing hydrogel photocatalysts are ***,current applications of hydrogel photocatalysts in energy conversion and environmental remediation are ***,a comprehensive outlook and highlight future challenges in the development of hydrogel photocatalysts are presented.

关键词： hydrogel photocatalysts energy conversion environmental treatment