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模拟流体中真核状态鞭毛运动和纤毛运动的放大推进机构

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苏州大学学报（工科版） 2004年第5期24卷 8-10页

作者： Shunichi KOBAYASHI Kozo FURIHATA tomoaki mashima Hirohisa MORIKAWA Shinshu University Shinshu UniversityShinshu UniversityShinshu University UedaNagano386-8567 JapanUedaNagano386-8567 JapanUedaNagano386-8567 JapanUedaNagano386-8567 Japan

0 引言由于大部分的生物体都具有相对的自发性、功能性和有效率性,模仿生物体动作的机械研究在工程领域是非常重要的.根据这个观点,我们研究了一种基于水中微生物动作的微型推进机构.

关键词：模拟流体鞭毛运动纤毛运动微生物微型推进机构仿生学微型机器人

PM_(2.5)粉末样品中不同组分的氧化潜势及影响因素

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中国环境科学 2024年第4期44卷 1957-1965页

作者：彭勤李丹罗玉彭泽志孙健 tomoaki Okuda 沈振兴西安交通大学环境科学与工程系陕西西安710049 庆应义塾大学科学技术学院日本神奈川县横滨市223-8522

基于大流量旋风式冲击采样器在西安市采集了四季大气PM_(2.5)粉末样品,分别测定其水溶和非水溶相的氧化潜势(OP)､无机元素､水溶性离子､金属组分､碳组分和有机官能团,揭示水溶相/非水溶相的化学组分对OP的影响.结果显示,西安市PM_(2.5)... 详细信息

基于大流量旋风式冲击采样器在西安市采集了四季大气PM_(2.5)粉末样品,分别测定其水溶和非水溶相的氧化潜势(OP)､无机元素､水溶性离子､金属组分､碳组分和有机官能团,揭示水溶相/非水溶相的化学组分对OP的影响.结果显示,西安市PM_(2.5)粉末样品总OP的趋势为秋冬(秋7.24μmol/(min·mg),冬5.19μmol/(min·mg))显著高于春夏季(春2.06μmol/(min·mg),夏3.15μmol/(min·mg));春夏季PM_(2.5)粉末样品的OP以水溶相OP为主(70.0%),秋冬季以非水溶相为主(73.9%).水溶性金属Ni､Pb､Ba､Mn､Cu､Ti(0.60

关键词： PM_(2.5) 粉末样品 ROS 氧化潜势氧化应激化学组分

Inverse relationship between platelet Akt activity and hippocampal atrophy:A pilot case-control study in patients with diabetes mellitus

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World Journal of Clinical Cases 2024年第2期12卷 302-313页

作者： Haruhiko Tokuda Takamitsu Hori Daisuke Mizutani Tomoyuki Hioki Kumi Kojima Takashi Onuma Yukiko Enomoto tomoaki Doi Rie Matsushima-Nishiwaki Shinji Ogura Hiroki Iida Toru Iwama Takashi Sakurai Osamu Kozawa Department of Metabolic Research Research InstituteNational Center for Geriatrics and GerontologyObu 474-8511Japan Department of Clinical Laboratory National Center for Geriatrics and GerontologyObu 474-8511Japan Department of Pharmacology Gifu University Graduate School of MedicineGifu 501-1194Japan Department of Neurosurgery Gifu University Graduate School of MedicineGifu 501-1194Japan Department of Dermatology Central Japan International Medical CenterMinokamo 505-8510Japan Department of Anesthesiology and Pain Medicine Gifu University Graduate School of MedicineGifu 501-1194Japan Department of Emergency Medicine Faculty of MedicineUniversity of ToyamaToyama 930-0194Japan Department of Emergency and Disaster Medicine Gifu University Graduate School of MedicineGifu 501-1194Japan Research Institute National Center for Geriatrics and GerontologyObu 474-8511Japan

BACKGROUND Akt plays diverse roles in *** is involved in the pathogenesis of type 2 diabetes mellitus(T2DM),which is caused by insulin *** also plays a vital role in human platelet ***,the hippocampus is closely associated with memory and learning,and a decrease in hippocampal volume is reportedly associated with an insulin-resistant phenotype in T2DM patients without *** To investigate the relationship between Akt phosphorylation in unstimulated platelets and the hippocampal volume in T2DM *** Platelet-rich plasma(PRP)was prepared from the venous blood of patients with T2DM or age-matched *** pellet lysate of the centrifuged PRP was subjected to western blotting to analyse the phosphorylation of Akt,p38 mitogen-activated protein(MAP)kinase and glyceraldehyde 3-phosphate dehydrogenase(GAPDH).Phosphorylation levels were quantified by densitometric *** volume was analysed using a voxel-based specific regional analysis system for Alzheimer’s disease on magnetic resonance imaging,which proposes the Z-score as a parameter that reflects hippocampal *** The levels of phosphorylated Akt corrected with phosphorylated p38 MAP kinase were inversely correlated with the Z-scores in the T2DM subjects,whereas the levels of phosphorylated Akt corrected with GAPDH were ***,this relationship was not observed in the control *** These results suggest that an inverse relationship may exist between platelet Akt activation and hippocampal atrophy in T2DM *** findings provide insight into the molecular mechanisms underlying T2DM hippocampal atrophy.

关键词： Akt Platelet Hippocampal atrophy Magnetic resonance imaging Diabetes mellitus

High piezoelectricity after field cooling AC poling in temperature stable ternary single crystals manufactured by continuous-feeding Bridgman method

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Journal of Advanced Ceramics 2022年第1期11卷 57-65页

作者： Cong LUO tomoaki KARAKI Zhuangkai WANG Yiqin SUN Yohachi(John)YAMASHITA Jiayue XU School of Materials Science and Engineering Shanghai Institute of TechnologyShanghai 201418China Department of Electrical and Computer Engineering Faculty of EngineeringToyama Prefectural UniversityToyama 939-0398Japan Department of Mechanical&Aerospace Engineering North Carolina State UniversityNC 27695-7910USA

After field cooling(FC)alternating current poling(ACP),we investigated the dielectric and piezoelectric properties of[001]_(pc)-oriented 0.24Pb(In_(1/2)Nb_(1/2))O_(3)(PIN)-0.46Pb(Mg_(1/3)Nb_(2/3))O_(3)(PMN)-0.30PbTiO3(PT)(PIMN-0.30PT)single crystals(SCs),which were manufactured by continuous-feeding Bridgman(CF BM)within morphotropic phase boundary(MPB)*** ACP with 4 kVrms/cm from 100 to 70℃,the PIMN-0.30PT SC attained high dielectric permittivity of 8330,piezoelectric coefficient(d_(33))of 2750 pC/N,bar mode electromechanical coupling factorκ_(33)of 0.96 with higher phase change temperature(T_(pc))of 103℃,and high Curie temperature(7c)of 180℃.These values are the highest ever reported as PIMN-xPT SC system with Tpc>100℃.The enhancement of these properties is attributed to the induced low symmetry multi-phase supported by phase *** work indicates that FC ACP is a smart and promising method to enhance piezoelectric properties of relaxor-PT ferroelectric SCs including PIMN-xPT,and provides a route to a wide range of piezoelectric device applications.

关键词： field cooling(FC)alternating current poling(ACP) PIMN-0.30PT high piezoelectricity

Spurious-mode vibrations caused by alternating current poling and their solution process for Pb(Mg_(1/3)Nb_(2/3))O_(3)-PbTiO_(3) single crystals

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Journal of Materiomics 2022年第1期8卷 96-103页

作者： Yiqin Sun tomoaki Karaki Tadashi Fujii Yohachi John Yamashita Department of Intelligent Robotics Toyama Prefectural UniversityImizu9390398ToyamaJapan Mechanical&Aerospace Engineering North Carolina State UniversityRaleighNC27695-7910USA

The effects of alternating current poling(ACP)at 80℃on electrical properties of[001]-oriented 0.72 Pb(Mg_(1/3)Nb_(2/3))O_(3)-0.28PbTiO_(3)(PMN-28PT)single crystals(SCs)have been *** square-wave ACP SCs poled at high voltage(HV,5 kV_(rms)/cm)occasionally showed large fluctuations and low opposite values of piezoelectric coefficient(d_(33)=±1370 pC/N)in one *** revealed spuriousmode vibrations(SMV)of impedance ***,after depolarizing and repolarizing the sample with a sine-wave ACP at low voltage(LV,3.5 kV_(rms)/cm),the d_(33) enhanced to be 1720 pC/N(+26%)and did not exhibit large fluctuation or opposite values in one plate any *** impedance spectrum became clean and the abnormal SMV *** proposed four possible mechanisms of the SMV,and speculate that the main cause maybe by macro-scale sub-domain structure and/or phase change in the main domain structure and/or phase in the SC plate due to the specific poling conditions not eternal mechanical damage of PMN-PT *** study will be useful to realize a high d_(33) and improve other properties of PMN-PT ACP SC ultrasonic transducers without any SMV for high-frequency medical imaging equipment.

关键词： Alternating current poling Ferroelectric single crystal Ultrasonic transducer Spurious mode vibration Piezoelectric property

Recent Research Progress in λ-Tunable WDM/TDM-PON

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光子学报 2014年第3期43卷 1-8页

作者： tomoaki YOSHIDA NTT Access Network Service Systems Laboratories NTT Corporation

This paper describes the current research status of theλ-tunable Wavelength-Division Multiplexing/Time-Division-Multiplexing-Passive Optical Network(WDM/TDM-PON). This optical access system realizes new cost-effective operations from the network operator′s point of *** main feature of the proposed system is that it aggressively exploits wavelength *** classify the system configurations and ***,we describe key technologies,namely newly developedλ-tuning burst-mode transceivers and a widely applicable Dynamic Wavelength and Bandwith Allocation(DWBA)***,we summarize our research and discuss several issues related to the λ-tunable Wavelength-Division Multiplexing/Time-Division-MultiplexingPassive Optical Network(WDM/TDM-PON).

关键词：摘要编辑部编辑工作读者

Median neuropathy after multiple punctures of the forearm for catheterization:A case report

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世界临床病例杂志 2023年第25期11卷 5941-5946页

作者： tomoaki Suzuki Yuichiro Matsui Daisuke Momma Takeshi Endo Norimasa Iwasaki Department of Orthopaedic Surgery Faculty of Medicine and Graduate School of MedicineHokkaido UniversitySapporo 060-8638Japan Section for Clinical Education Faculty of Dental MedicineHokkaido UniversitySapporo 060-8586Japan Center for Sports Medicine Hokkaido UniversitySapporo 060-8638Japan

BACKGROUND Neuropathy may occur at some sites after catheterization for close examination of cardiac *** the radial artery is considered a relatively uncomplicated site for catheterization,the radial artery and median nerve are in relatively close proximity,with the risk of median nerve injury depending on the angle of *** purpose of this study was to report the outcomes of surgery performed for conservative therapy-resistant median neuropathy following forearm *** SUMMARY A 50-year-old woman experienced palsy from the right thumb to the radial side of the ring finger after catheterization from the radial artery of the right *** developed at the same site and a positive tinel-like sign was seen for the median nerve area at the high level of the puncture *** conduction study showed reduced compound muscle action potentials and loss of sensory nerve action *** did not improve despite pharmacotherapy and the patient gradually developed flexion restrictions of the index and middle *** nerve injury and associated flexor tendon adhesion was diagnosed,and the patient was referred for surgery at 3 mo after *** the same area was opened,no injury to the median nerve epithelium was obvious,but the area of the positive tinel-like sign was highly adherent to surrounding tissue and to the flexor digitorum superficialis of the index and middle *** surgery was terminated with adequate adhesion *** was initiated postoperatively,improving neurological symptoms and range of motion of the *** months after surgery,the patient returned to daily activities without *** This case provides the appropriate diagnosis and treatment for a suspected peripheral nerve injury.

关键词： Catheterization Median neuropathy Surgical treatment Case report

Assessment of the stiffened panel performance in the OTEC seawater tank design:Parametric study and sensitivity analysis

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Theoretical & Applied Mechanics Letters 2023年第4期13卷 261-271页

作者： Yogie Muhammad Lutfi Ristiyanto Adiputra Aditya Rio Prabowo tomoaki Utsunomiya Erwandi Erwandi Nurul Muhayat Department of Mechanical Engineering Universitas Sebelas MaretSurakarta 57126Indonesia Research Center for Hydrodynamics Technology National Research and Innovation Agency(BRIN)Surabaya 60117Indonesia Department of Marine Systems Engineering Kyushu UniversityFukuoka 819-0395Japan

Ocean thermal energy conversion(OTEC)is a process of generating electricity by exploiting the temperature difference between warm surface seawater and cold deep *** to the high static and dynamic pressures that are caused by seawater circulation,the stiffened panel that constitutes a seawater tank may undergo a reduction in ultimate *** current paper investigates the design of stiffening systems for OTEC seawater tanks by examining the effects of stiffening parameters such as stiffener sizes and span-over-bay ratio for the applied combined loadings of lateral and transverse pressure by fluid motion and axial compression due to global bending *** ultimate strength calculation was conducted by using the non-linear finite element method via the commercial software known as *** stress and deformation distribution due to pressure loads was computed in the first step and then brought to the second step,in which the axial compression was *** effects of pressure on the ultimate strength of the stiffener were investigated for representative stiffened panels,and the significance of the stiffener parameters was assessed by using the sensitivity analysis *** a result,the ultimate strength was reduced by approximately 1.5%for the span-over-bay ratio of 3 and by 7%for the span-over-bay ratio of 6.

关键词： Ocean thermal energy conversion(OTEC) Seawater tank Stiffened panels Numerical analysis Combined loadings

Origin and Evolution of Ultramafic Rocks along the Sagaing Fault, Myanmar

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Journal of Earth Science 2023年第1期34卷 122-132页

作者： tomoaki Morishita Hnin Min Soe Hla Htay Than Htut Lwin Juan Miguel Guotana Akihiro Tamura Tomoyuki Mizukami Khin Zaw 无 Faculty of Geosciences and Civil Engineering Kanazawa UniversityKanazawa920-1192Japan Lamont-Doherty Earth Observatory Columbia UniversityPalisadesNY10964USA Volcanoes and Earth’s Interior Research Center Japan Agency for Marine-Earth Science and Technology2-15 NatsushimaKanagawa237-0061Japan Geology Department University of MandalayMandalay05092Myanmar Geology Department Dagon UniversityNorth Dagon11422Myanmar Taunggoke Degree College TaunggokeTaunggoke Township07161Myanmar Graduate School of Natural Science and Technology Kanazawa UniversityKanazawaIshikawa920-1192Japan CODES ARC Centre of Excellence in Ore Deposits University of TasmaniaTasmania7001Australia

The active Sagaing fault in Myanmar defines the boundary between the Indian Plate and the Eurasian Plate and causes seismic damage in the major cities of Myanmar. Small bodies of serpentinite occur along the fault. We for the first time investigated the highly sheared serpentinite bodies in the Sheinmagar area and Yega Inn area along the Sagaing fault. Extensively sheared/brecciated serpentinites and related rocks, such as talc and/or chlorite-bearing rocks contains small rock fragments of serpentinites. Serpentine texture and mineral chemistry indicate that the protolith of these serpentinites were mainly harzburgite with minor amounts of dunite, some of which are cut by gabbroic veins. No shape-preferred orientation of the antigorite is present, indicating that the serpentinization was occurred under relatively static conditions. Protolith and serpentine minerals are similar to those of the jadeitite-bearing serpentinites in the north of the Sagaing fault(the Jade Mine belt). Chemical variations of spinels in the studied area are within the compositional range of forearc peridotites and those in the mantle section of nearby ophiolites. After the formation of antigorite serpentinite under static conditions, these serpentinites were subsequently, but locally deformed, probably due to the activity of the Sagaing fault, resulting in the formation of serpentinite schist/brecciated rock. The presence of the less-deformed antigorite serpentinite in the sheared/brecciated zone indicates the strain localization mainly along the surrounding serpentine-talc(±chlorite) schistose rocks, which is probably formed by the reaction between serpentinite and country rocks. Further studies are needed to better understand whether the distribution of serpentinized peridotites cause variations in the activity of the Sagaing fault.

关键词： Sagaing fault serpentinite deformation ophiolite