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Nano-Micro Letters 2024年第1期16卷 106-130页

作者： Jun Hu mitsumasa iwamoto Xiangyu Chen CAS Center for Excellence in Nanoscience Beijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083People’s Republic of China School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Department of Physical Electronics Tokyo Institute of Technology2‑12‑1 S3‑33 O‑OkayamaMeguro‑KuTokyo 152‑8552Japan

The triboelectric nanogenerator(TENG)can effectively collect energy based on contact electrification(CE)at diverse interfaces,including solid–solid,liquid–solid,liquid–liquid,gas–solid,and gas–*** enables energy harvesting from sources such as water,wind,and *** this review,we provide an overview of the coexistence of electron and ion transfer in the CE *** elucidate the diverse dominant mechanisms observed at different interfaces and emphasize the interconnectedness and complementary nature of interface *** review also offers a comprehensive summary of the factors influencing charge transfer and the advancements in interfacial modification ***,we highlight the wide range of applications stemming from the distinctive characteristics of charge transfer at various ***,this review elucidates the future opportunities and challenges that interface CE may *** anticipate that this review can offer valuable insights for future research on interface CE and facilitate the continued development and industrialization of TENG.

关键词： Contact electrification Interfaces Triboelectric nanogenerators Diversified applications

Optical second-harmonic generation measurement for probing organic device operation

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Light(Science & Applications) 2015年第1期4卷 99-108页

作者： Takaaki Manaka mitsumasa iwamoto Department of Physical Electronics Tokyo Institute of Technology2-12-1 O-okayamaMeguro-kuTokyo 152-8552Japan

We give a brief overview of the electric-field induced optical second-harmonic generation(EFISHG)technique that has been used to study the complex behaviors of organic-based *** analyzing EFISHG images of organic field-effect transistors,the in-plane two-dimensional distribution of the electric field in the channel can be *** susceptibility tensor of the organic semiconductor layer and the polarization of the incident light are considered to determine the electric field *** imaging can effectively evaluate the distribution of the vectorial electric field in organic films by selecting a light *** the time-resolved technique,measurement of the electric field originating from the injected carriers allows direct probing of the carrier motion under device operation,because the transient change of the electric field distribution reflects the carrier *** applications of the EFISHG technique to organic electronic devices are reviewed.

关键词： electric field optical second-harmonic generation semiconductor device

Synthesis of CZTS nanocrystal and enhancement of mobility by ligand exchange

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Synthesis of CZTS nanocrystal and enhancement of mobility by...

Bone and soft tissue tumors presenting as sciatic notch dumbbell masses: A critical differential diagnosis of sciatica

第二届新型太阳能电池学术研讨会

作者： Kentaro Abe Songping Luo Xin Li Heping Shen Jianbao Li mitsumasa iwamoto Hong Lin State Key Laboratory of New Ceramics & Fine Processing Department of Material Science and Engineering Tsinghua University

Pure kesterite CuZnSnS(CZTS)nanocrystals with an average diameter of about 15-20 nm were successfully synthesized by hot-injection method(Figure 1),which was confirmed by comprehensive characterizations including TEM,...

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World Journal of Clinical Oncology 2016年第5期7卷 414-419页

作者： Yoshihiro Matsumoto Tomoya Matsunobu Katsumi Harimaya Kenichi Kawaguchi mitsumasa Hayashida Seiji Okada Toshio Doi Yukihide iwamoto Department of Orthopaedic Surgery Graduate School of Medical Sciences Kyushu University Department of Orthopaedic Surgery Kyushu University Beppu Hospital

AIM To study the clinical findings and characteristic features in sciatic notch dumbbell tumors(SNDTs).METHODS We retrospectively reviewed the clinical outcomes and characteristic features of consecutive cases of SNDTs(n = 8). RESULTS Buttock masses occurred in three patients with SNDT(37.5%). Severe buttock tenderness and pain at rest were observed in seven patients with SNDTs(87.5%). Remarkably, none of the patients with SNDTs experienced back pain. Mean tumor size was 8.4 ± 2.0 cm(range, 3.9 to 10.6 cm) and part of the tumor mass was detected in 2 patients in the sagittal view of lumbar magnetic resonance imaging(MRI).CONCLUSION The clinical information regarding to SNDTs is scarce. The authors consider that above mentioned characteristic findings may facilitate the suspicion of pelvic pathology and a search for SNDT by MRI or computed tomography should be considered in patients presenting with sciatica without evidence of spinal diseases.

关键词： Sciatic notch Dumbbell masses Sciatica Differential diagnosis Bone and soft tissue tumor

Computationally Efficient Large-Eddy Simulation of Periodic Unsteady Flow using Harmonic Balance Method

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Journal of Thermal Science 2022年第1期31卷 62-71页

作者： YUMA iwamoto SUSUMU Teramoto KOJI Okamoto Department of Aeronautics and Astronautics University of TokyoTokyo 113-8656Japan Department of Advanced Energy University of TokyoTokyo 113-8656Japan

To improve the efficiency and fidelity of the numerical analysis for cascade flutter, we propose an efficient scale-resolving simulation method dedicated to time-periodic flows by incorporating the harmonic balance approach into the large-eddy simulation. This method combined convergence calculations of the steady-state problem based on the harmonic balance method for periodic components, and the nonlinear time-marching method for turbulent fluctuations. Using the proposed method, deterministic periodic components and stochastic turbulent fluctuations were calculated simultaneously, and the effect of turbulent fluctuations on deterministic periodic components was directly calculated without using turbulence models. In this paper, we explain the algorithm and feature of this simulation technique and present the results of the computation for channel flow excited in the streamwise direction as an analysis example using the proposed method. In order to validate the proposed method, an analysis of sinusoidally pulsating channel flow at the central friction-velocity Reynolds numbers Rer = 180 was conducted, confirming that the amplitude and phase of the mean velocity oscillation computed by the proposed method were in good agreement with those of the conventional LES. The present calculation achieved an order of magnitude improvement in computational efficiency compared to conventional LES.

关键词： harmonic balance LES turbulent channel flow

Epigenetic memory of drug exposure history controls neural stem cell quiescence in the adult brain

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Neural Regeneration Research 2024年第4期19卷 711-712页

作者： Masakazu iwamoto Taito Matsuda Department of Stem Cell Biology and Medicine Graduate School of Medical SciencesKyushu UniversityFukuokaJapan

Neural stem cells(NSCs)are the source of all neurons and glial cells(astrocytes and oligodendrocytes)in the central nervous *** adult mammalian brain retains NSCs in the subgranular zone of the dentate gyrus in the hippocampus and ventricular subventricular zone lining the lateral ventricle(Olpe and Jessberger,2022).Adult NSCs in rodents are preserved throughout life and continuously produce new neurons that integrate into the pre-existing neuronal network.

关键词： neural integrate continuously

Effect of impact deformation on shape recovery behavior in Fe-Mn-Si shape memory alloy under shape memory training process with cyclic thermo-mechanical loading

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Science China(Technological Sciences) 2021年第7期64卷 1389-1400页

作者： SUN Qian CAO Bo iwamoto Takeshi SUO Tao Graduate School of Engineering Hiroshima UniversityHigashi-Hiroshima739-8527Japan Cluster of Excellence livMatS@FIT-Freiburg Center for Interactive Materials and Bioinspired Technologies University of FreiburgFreiburgD-79110Germany Academy of Science and Technology Hiroshima UniversityHigashi-Hiroshima739-8527Japan School of Aeronautics Northwestern Polytechnical UniversityXi’an710072China

In the past studies, it has been discovered that the shape memory effect(SME) in the Fe-Mn-Si shape memory alloy(Fe-SMA)can gradually be enhanced by a pre-process called as shape memory training process under cyclic thermo-mechanical *** the other hand, it has been shown that the SME of Fe-SMA can also be affected by changing the strain rate. Therefore, it is possible to improve the SME by combining the strain rate sensitivity and shape memory training process. However, the improvement of SME caused by the training process under impact condition is still unclear. For the training process under impact condition, it is difficult to interrupt the test at the desired strain level due to many reflections of stress waves, which reload the specimen from the free ends. In this paper, to obtain reliable experimental results of SME after the training process under impact condition, the stress waves after first loading are eliminated by the double momentum-trap structure introduced into the impact tensile testing apparatus based on the split Hopkinson pressure bar method. In order to achieve an optimum design of the structure used in experiments, the finite element simulation of the structure is performed. Then, tensile tests in the training process of Fe-28Mn-6Si-5Cr alloy at different strain rates including the impact level are conducted and temperature change of the specimen is measured during training and heating process. As a result, the improvement of SME in the alloy after the training process under quasi-static and impact loading is compared with that under quasi-static loading through verification processes.

关键词： Fe-Mn-Si shape memory alloy training cyclic thermo-mechanical process split Hopkinson pressure bar momentumtrap impact deformation

Study of Forced Convection Heat Transfer of Supercritical CO_(2) in a Horizontal Channel by Lattice Boltzmann Method

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Advances in Applied Mathematics and Mechanics 2010年第5期2卷 564-572页

作者： Xiaodong Niu Hiroshi Yamaguchi Yuhiro iwamoto Xinrong Zhang Mingjun Li Yuhiro iwamoto Department of Mechanical Engineering Doshisha UniversityKyo-Tanabe-ShiKyoto 610-0321Japan Department of Energy and Resources Engineering College of EngineeringPeking UniversityBeijing 100871P.R.China Department of Mechanical Engineering Xiangtan UniversityHunan 411105P.R.China

The problem of forced convection heat transfer of supercritical CO_(2) in a horizontal channel is investigated numerically by a lattice Boltzmann *** study is stimulated by our recent experimental findings on solar collectors using supercritical CO_(2) as a working fluid,which can achieve the collector efficiency high up to 70%.To deeply understand the heat transfer characteristics of supercritical CO_(2) and provide a theoretical guidance for improving our current experimental system,in present study several typical experimental flow conditions are *** particular,the work focuses on the convective heat transfer characteristics of supercritical CO_(2) flowing in a horizontal channel with mediate Reynolds numbers ranging from 210 to 840 and constant heat fluxes from 400.0 to 800.0 W/m^(2).The simulations show that the heat transfer increases with heat flux and decreases with Reynolds ***,the mechanisms of heat transfer enhancement of supercritical CO_(2) fluid are identified.

关键词： Forced convection supercritical CO_(2) lattice Boltzmann method

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AIDS is not over

Science China(Life Sciences) 2015年第5期58卷 517-518页

作者： iwamoto Aikichi LIU HuanLiang LI Hong Institute of Medical Science The University of Tokyo Institute of Human Virology and Key Laboratory of Tropical Disease Control of Ministry of Education Guangdong Institute of Gastroenterology and the Sixth Affiliated Hospital Sun Yat-sen University Yunnan Center for Disease Control and Prevention

Acquired immunodeficiency syndrome （AIDS） was first reported in 1981. Five healthy young men suddenly presented with opportunistic pneumonia caused by Pneumocystis carinii （currently termed P. jirovecii）. The original report from Los Angeles was followed by many reports of patients with similar symptoms in large cities in North America and in Europe. People in resource-rich countries were shocked by this sudden emergence of a highly fatal disease among gay men.

关键词：艾滋病 AIDS 免疫缺陷资源丰富综合症肺炎大城市洛杉矶

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HIV-1 tropism

Protein & Cell 2010年第6期1卷 510-513页

作者： Aikichi iwamoto Noriaki Hosoya Ai Kawana-Tachikawa Division of Infectious Diseases Advanced Clinical Research CenterInstitute of Medical ScienceThe University of TokyoTokyo 108-8639Japan International Research Center for Infectious Diseases Institute of Medical ScienceThe University of TokyoTokyo 108-8639Japan Research Center for Asian Infectious Diseases Institute of Medical ScienceThe University of TokyoTokyo 108-8639Japan

Acquired immunodeficiency syndrome(AIDS)was reported in 1981((CDC),1981).Human immunodeficiency virus type-1(HIV-1),the virus causing AIDS,was isolated in 1983(Barré-Sinoussi et al.,1983).Since AIDS patients were characterized by a profound decrease in CD4-positive T cell count(Gottlieb et al.,1981),it was a logical consequence that CD4 would be the most probable receptor for the ***,it was confirmed that CD4 is the primary receptor for HIV-1 in 1986(Maddon et al.,1986).However,it was speculated that HIV-1 requires another factor to infect a cell,since CD4 alone could not support HIV-1 infection to nonhuman cells(Weiner et al.,1991).

关键词： immunodeficiency Barr AIDS