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Journal of Environmental Sciences 2014年第2期26卷 343-352页

作者： kohei sakata Aya Sakaguchi Masaharu Tanimizu Yuichi Takaku Yuka Yokoyama Yoshio Takahashi Department of Earth and Planetary Systems Science Hiroshima University Kochi Institute for Core Sample Research Japan Agency for Marine-Earth Science and Technology Institute for Environmental Sciences

Sources of Pb pollution in the local atmosphere together with Pb species, major ions, and heavy metal concentrations in a size-fractionated aerosol sample from Higashi-Hiroshima （Japan） have been determined by X-ray absorption near-edge structure （XANES） spectroscopy, ion chromatography, and ICP-MS/AES, respectively. About 80% of total Pb was concentrated in fine aerosol particles. Lead species in the coarse aerosol particles were PbC204, 2PbCO3-Pb（OH）2, and Pb（NO3）2, whereas Pb species in the fine aerosol particles were PbC204, PbSO4, and Pb（NO3）2. Chemical speciation and abundance data suggested that the source of Pb in the fine aerosol particles was different from that of the coarse ones. The dominant sources of Pb in the fine aerosol particles were judged to be fly ash from a municipal solid waste incinerator and heavy oil combustion. For the coarse aerosol particles, road dust was considered to be the main Pb source. In addition to Pb species, elemental concentrations in the aerosols were also determined. The results suggested that Pb species in size-fractionated aerosols can be used to identify the origin of aerosol particles in the atmosphere as an alternative to Pb isotope ratio measurement.

关键词： lead lead speciation XAFS spectroscopy size-fractionated aerosol sample

聚合物稳定的金纳米簇催化:理论计算与实验的相互影响（英文）

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Chinese Journal of Catalysis 2016年第10期37卷 1588-1593页

作者： Hiroaki Koga Yoshinori Ato Akihide Hayashi kohei Tada Mitsutaka Okumura 京都大学催化剂与电池元素战略研究基地大阪大学科学研究院化学系

平均粒径为2–10 nm的聚合物稳定的Au纳米簇(NCs)表现出独特的催化性能.多个研究表明,影响聚合物稳定的AuNCs催化活性的主要因素为:AuNC尺寸的控制、聚合物的选择以及反应条件的优化.这是由于聚合物稳定的AuNCs在多个催化反应中表现出... 详细信息

平均粒径为2–10 nm的聚合物稳定的Au纳米簇(NCs)表现出独特的催化性能.多个研究表明,影响聚合物稳定的AuNCs催化活性的主要因素为:AuNC尺寸的控制、聚合物的选择以及反应条件的优化.这是由于聚合物稳定的AuNCs在多个催化反应中表现出明显的尺寸效应,其催化活性也因所采用的聚合物和反应条件的不同而不同.为了阐明影响聚合物稳定的AuNCs催化活性的内在原因,众多研究者关注于聚合物稳定的AuNCs催化中的理论计算与实验的相互影响.本文主要总结了聚合物稳定的AuNCs中这种相互影响的研究进展.

关键词：聚合物稳定的金纳米簇醇的有氧氧化理论计算和实验的相互影响金纳米簇的尺寸效应聚合物的作用

Immunotherapy for esophageal cancer:Where are we now and where can we go

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World Journal of Gastroenterology 2024年第19期30卷 2496-2501页

作者： Yoshiaki Shoji Kazuo Koyanagi kohei Kanamori kohei Tajima Mika Ogimi Yamato Ninomiya Miho Yamamoto Akihito Kazuno Kazuhito Nabeshima Takayuki Nishi Masaki Mori Department of Gastroenterological Surgery Tokai University School of MedicineKanagawa 259-1193Japan

Immune checkpoint inhibitor therapy has dramatically improved patient prognosis,and thereby transformed the treatment in various cancer types including esophageal squamous cell carcinoma(ESCC)in the past *** antibodies that selectively inhibit programmed cell death-1(PD-1)activity has now become standard of care in the treatment of ESCC in metastatic settings,and has a high expectation to provide clinical benefit during perioperative ***,anti-cytotoxic T-lymphocyte–associated protein 4(CTLA-4)monoclonal antibody has also been approved in the treatment of recurrent/metastatic ESCC in combination with anti-PD-1 *** understanding of the existing evidence of immune-based treatments for ESCC,as well as recent clinical trials on various combinations with chemotherapy for different clinical settings including neoadjuvant,adjuvant,and metastatic diseases,may provide future prospects of ESCC treatment for better patient outcomes.

关键词： Esophageal cancer Immunotherapy Immune checkpoint inhibitor Programmed cell death-1 Anti-cytotoxic T-lymphocyte-associated protein 4 Neoadjuvant therapy Adjuvant therapy Clinical trials Combination therapy

Thermally activated delayed fluorescence carbazole-triazine dendrimer with bulky substituents

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Aggregate 2024年第1期5卷 236-243页

作者： Hiroki Ikebe kohei Nakao Eri Hisamura Minori Furukori Yasuo Nakayama Takuya Hosokai Minlang Yang Guanting Liu Takuma Yasuda Ken Albrecht Interdisciplinary Graduate School of Engineering Sciences Kyushu UniversityFukuokaJapan Institute for Materials Chemistry and Engineering Kyushu UniversityKasugaJapan Department of Pure and Applied Chemistry Graduate School of Science and TechnologyTokyo University of ScienceNodaChibaJapan National Metrology Institute of Japan(NMIJ) National Institute of Advanced Industrial Science and Technology(AIST)TsukubaIbarakiJapan Institute for Advanced Study Kyushu UniversityNishi-kuFukuokaJapan

Carbazole-triazine dendrimers with a bulky terminal substituent were synthesized,and the thermally activated delayed fluorescence(TADF)property was *** to unsubstituted carbazole dendrimers,dendrimers with bulky terminal substituents showed comparable to better photoluminescence quantum yields(PLQY)in neat ***(PF)-substituted dendrimers showed the highest PLQY of 81%,a smallΔEst of 0.06 eV,and the fastest reverse intersystem crossing(RISC)rate of∼1×10^(5 )s^(−1) compared to other *** measurements of dendrimers and dendrons(fragments)indicate that the close proximity of the triplet energy of phenylfluorene-substituted carbazole dendrons(^(3)LE)to that of phenylfluorene-substituted dendrimers(^(1)CT,^(3)CT)contributes to RISC promotion and improves TADF *** modification fine-tunes the energy level and suppresses intermolecular interactions,and this study provides a guideline for designing efficient solution-processable and non-doped TADF materials.

关键词： dendrimer OLED TADF 1 INTRODUCTION Thermally activated delayed fluorescence(TADF)materials which are inexpensive and highly efficient alternatives to fluorescent

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未来气候条件下蒙古草原植被的预测分布

Journal of Plant Ecology 2024年第3期17卷 16-27页

作者： kohei Suzuki Ikutaro Tsuyama Radnaakhand Tungalag Amartuvshin Narantsetseg Tsagaanbandi Tsendeekhuu Masato Shinoda Norikazu Yamanaka Takashi Kamijo Department of Regional Regeneration Science Faculty of Regional Environment ScienceTokyo University of AgricultureTokyo 156-8502Japan Hokkaido Research Center Forestry and Forest Products Research InstituteHokkaido 062-8516Japan Department ofBiology School of Arts and SciencesNational University of MongoliaUlaanbaatar 210646Mongolia Botanic Garden and ResearchInstitute Mongolian Academy of ScienceUlaanbaatar 51Mongolia Department of Earth and Environmental Sciences GraduateSchool of Environmental StudiesNagoya UniversityNagoya 464-8601Japan Arid Land Research Center Tottori UniversityTottori680-0001Japan Faculty of Life and Environmental Sciences University of TsukubaIbaraki 305-8572Japan

蒙古牧民家庭通过适应当地植被分布的特点来维持牲畜的健康状况。因此,预测未来植被变化对于稳定的牲畜放牧和可持续的草原利用至关重要。本研究基于前期研究获得的植被数据预测了2081年至2100年间草原植被,尤其是沙漠草原、草原和草甸... 详细信息

蒙古牧民家庭通过适应当地植被分布的特点来维持牲畜的健康状况。因此,预测未来植被变化对于稳定的牲畜放牧和可持续的草原利用至关重要。本研究基于前期研究获得的植被数据预测了2081年至2100年间草原植被,尤其是沙漠草原、草原和草甸草原的分布范围。我们首先基于在蒙古(43–50°N,87–119°E)收集的草原植被数据(2012至2016年,278个样地)划分了不同的群落类型。其次,采用最大熵(MaxEnt)模型进行物种分布建模,其中以荒漠草原、草原和草甸草原的分布数据作为目标变量,使用WorldClim的生物气候数据作为解释变量。最后,采用WorldClim提供的CMIP6下缩放的未来气候预测数据进行未来预测。结果发现,荒漠草原、草原和草甸草原模型的曲线下面积值分别为0.850、0.847和0.873。根据所有情景和所有群落的气候变化,适宜栖息地预计将缩小。潜在适宜区域减少的程度在草甸草原群落中最为显著。上述结果表明,未来气候变化情景下草甸草原群落将转变为草原群落。

关键词：气候变化群落最大熵物种分布建模草原 WorldClim

Effects of the 23-Valent Pneumococcal Polysaccharide Vaccine on the Mortality of Pneumonia among Elderly over 70 Years Old after the Great East Japan Earthquake—PPV Vaccination Program in Iwate Prefecture, Japan

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Advances in Infectious Diseases 2023年第2期13卷 216-226页

作者： Hiromi Nagashima Kozo Tanno Kiyomi sakata Masachica Akiyama Yu Utsumi kohei Yamauchi Department of Internal Medicine Iwate Medical University Yahaba Japan Department of Hygiene and Preventive Medicine Iwate Medical University Yahaba Japan Takizawa Central Hospital Takizawa Japan

Objective: To estimate the efficacy of 23-valent pneumococcal polysaccharide vaccine (PPSV23) among the elderly, we analyzed the relationship between the mortality of the elderly for pneumonia and the vaccination rate of PPSV23 from 2008 to 2016 in Iwate Prefecture, Japan. Study Design: The present study was a retrospective, observational, database study adopting an ecological design. The mortality for pneumonia among the elderly over 70 years old from 2006 to 2016 in Iwate Prefecture was calculated based on the data from the Japanese Vital Statistics. We compared the mortality rate (MR) of pneumonia among the elderly over 70 years old between the low-vaccinated period (LVP) (2006-2010) and high-vaccinated period (HVP) (2012-2016) using a Poisson regression model. Results: While the vaccination rate of PPSV23 among the elderly over 65 years old was 3.3% in 2010, it increased rapidly up to 40.7% in 2012 and reached 66.4% in 2016. The MR ratio of the total population during HVP to the average MR during LVP was 0.749. The MR of the total population during HVP was significantly lower than that during LVP (p Conclusion: The increase in vaccination rate of PPSV23 during HVP (2012-2016) may contribute to the decrease in mortality for pneumonia among the elderly over 70 years old in Iwate Prefecture.

关键词： PPSV23 Mortality of the Elderly for Pneumonia

FDNet:A Deep Learning Approach with Two Parallel Cross Encoding Pathways for Precipitation Nowcasting

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Journal of Computer Science & Technology 2023年第5期38卷 1002-1020页

作者：闫碧莹杨超陈峰 kohei Takeda Changjun Wang University of Chinese Academy of Sciences Beijing 100049China Institute of Software Chinese Academy of SciencesBeijing 100190China School of Mathematical Sciences Peking UniversityBeijing 100871China Peng Cheng Laboratory Shenzhen 518052China Guiyang Academy of Information Technology Guiyang 550081China NTT DATA Corporation Tokyo 163-8001Japan NTT DATA Institute of Management Consulting Inc. Tokyo 163-8001Japan

With the goal of predicting the future rainfall intensity in a local region over a relatively short period time,precipitation nowcasting has been a long-time scientific challenge with great social and economic *** radar echo extrapolation approaches for precipitation nowcasting take radar echo images as input,aiming to generate future radar echo images by learning from the historical *** effectively handle complex and high non-stationary evolution of radar echoes,we propose to decompose the movement into optical flow field motion and morphologic *** this idea,we introduce Flow-Deformation Network(FDNet),a neural network that models flow and deformation in two parallel cross *** flow encoder captures the optical flow field motion between consecutive images and the deformation encoder distinguishes the change of shape from the translational motion of radar *** evaluate the proposed network architecture on two real-world radar echo *** model achieves state-of-the-art prediction results compared with recent *** the best of our knowledge,this is the first network architecture with flow and deformation separation to model the evolution of radar echoes for precipitation *** believe that the general idea of this work could not only inspire much more effective approaches but also be applied to other similar spatio-temporal prediction tasks.

关键词： spatio-temporal predictive learning precipitation nowcasting neural network

肝静脉压力梯度微创时代:基于前臂静脉入路的探索

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中华肝脏病杂志 2024年第1期32卷 35-39页

作者：王继涛李雷牛猛朱清亮赵中伟 kohei Kotani Akira Yamamoto 张海军李双喜徐丹康宁李小果张昆鹏孙骏吴发宗张海龙刘登湘吕沐瀚纪建松 Norifumi Kawada 徐克祁小龙河北省肝硬化门静脉高压重点实验室河北医科大学附属邢台市人民医院邢台054000 兰州大学第一医院介入科兰州730000 中国医科大学附属第一医院介入科沈阳110000 西南医科大学附属医院消化内科泸州646000 丽水市中心医院介入诊疗中心丽水323000 日本大阪市立大学医院肝病科日本大阪日本大阪市立大学医学院放射介入科日本大阪东南大学附属中大医院门静脉高压中心南京210009

目的经颈静脉或经股动脉途径被用作当前实践中肝静脉压力梯度(HVPG)测量的常用方法。该研究旨在证实经前臂静脉途径测量HVPG的安全性和有效性。方法针对2020年9月至2020年12月前瞻性地从中国和日本的6所医院招募了经前臂静脉进行HVPG检... 详细信息

目的经颈静脉或经股动脉途径被用作当前实践中肝静脉压力梯度(HVPG)测量的常用方法。该研究旨在证实经前臂静脉途径测量HVPG的安全性和有效性。方法针对2020年9月至2020年12月前瞻性地从中国和日本的6所医院招募了经前臂静脉进行HVPG检测肝硬化患者,并收集患者的临床基线资料以及HVPG检测数据。入组患者均选择经右侧肘正中静脉或贵要静脉入路,采用HVPG标准化流程进行测压。研究数据采用SPSS 22.0统计学软件进行分析。定量资料采用中位数(四分位数间距)表示,定性资料采用频数和率表示。两组数据之间的相关性分析采用Pearson相关性分析。结果研究共入组43例患者,其中41例(95.3%)患者成功接受了经前臂静脉途径HVPG检测。无患者出现任何严重并发症。经前臂静脉途径HVPG检测中位操作时间为18.0min(12.3~38.8min)。研究证实HVPG与Child-Pugh评分(r=0.47,P=0.002)、白蛋白-胆红素评分(r=0.37,P=0.001)、Lok指数(r=0.36,P=0.02)、肝脏硬度(r=0.58,P=0.01)、脾硬度(r=0.77,P=0.01)呈正相关,且与白蛋白呈负相关(r=-0.42,P=0.006)。结论多中心回顾性研究结果提示经前臂静脉途径HVPG测量是安全可行的。

关键词：肝硬化肝静脉压力梯度前臂静脉

Performance Evaluation of Electromagnetic Shield Constructed from Open-Cell Metal Foam Based on Sphere Functions

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Computer Modeling in Engineering & Sciences 2022年第7期132卷 43-53页

作者： Yuya Hanaoka Taku Itoh kohei Tateyama Susumu Nakata Keiko Watanabe Graduate School of Industrial Technology Nihon UniversityNarashinoChiba 275-8575Japan College of Industrial Technology Nihon UniversityNarashinoChiba 275-8575Japan College of Science and Engineering Ritsumeican UniversityKusatsuShiga 525-8577Japan College of Information Science and Engineering Ritsumeican UniversityKusatsuShiga 525-8577Japan

This study evaluates the performance of a model of open-cell metal foams generated by sphere *** this end,an electromagnetic shield constructed from the model was inserted between two horn antennas in an electromagnetic wave propagation *** foam-hole diameter in the electromagnetic shield model was varied as d=2.5 and 5.0 mm,and the frequency of the electromagnetic waves was varied from 3 to 13 *** the numerical experiments of shield effectiveness,the shields with foam holes of both diameters attenuated the electromagnetic waves across the studied frequency *** shield effectiveness was enhanced at low frequencies and in the shield with smaller hole diameter.

关键词： Electromagnetic propagation electromagnetic shielding materials metal foams numerical simulation

Synchronous Double Primary Combined Hepatocellularcholangiocarcinoma and Cholangiolocarcinoma in a Cirrhotic Liver

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Journal of Clinical and Translational Hepatology 2023年第4期11卷 991-997页

作者： Masahiro sakata Koji Kitada Rika Omote Hiroshi Sonobe Masashi Utsumi Naoyuki Tokunaga Takashi Fushimi Ryota Nagao Tatsuro sakata Toshihiko Kaneyoshi Tatsuya Toyokawa Masaru Inagaki Department of Gastroenterology and Hepatology National Hospital OrganizationFukuyama Medical CenterFukuyamaHiroshimaJapan Department of Surgery National Hospital OrganizationFukuyama Medical CenterFukuyamaHiroshimaJapan Department of Laboratory and Pathology National Hospital OrganizationFukuyama Medical CenterFukuyamaHiroshimaJapan Department of Radiology National Hospital OrganizationFukuyama Medical CenterFukuyamaHiroshimaJapan

Both combined hepatocellular-cholangiocarcinoma(cHCCCCA)and cholangiolocarcinoma are rare primary liver ***-CCA is believed to originate from transformed hepatocellular carcinoma or liver stem/progenitor *** is characterized by ductular reaction-like anastomosing cords and glands resembling cholangioles or canals containing hepatocellular carcinoma components and adenocarcinoma *** to the 2019 revision of the World Health Organization criteria,a subtype with stem cell features as a subclassification of cHCC-CCA was abolished for lack of conclusive evidence of the stem cell origin *** led to the classification of cholangiolocarcinoma with hepatocytic differentiation as ***,cholangiolocarcinoma without hepatocytic differentiation is classified as a subtype of small-duct cholangiocarcinoma and is assumed to originate from the bile ***,we report the first case of double primary cHCC-CCA and cholangiolocarcinoma without hepatocytic differentiation in different hepatic segments of a cirrhotic *** believe this case supports the validity of the new World Health Organization criteria because the pathological finding of cHCC-CCA in this case shows the transformation of hepatocellular carcinoma to ***,this case may demonstrate that immature ductular cell stemness and mature hepatocyte cell stemness in hepatocarcinogenesis can coexist in the same *** results provide valuable insights into the mechanisms of growth,differentiation,and regulation of liver cancers.

关键词： Bile duct neoplasms Combined hepatocellular-cholangiocarcinoma Cholangiolocarcinoma Cirrhosis Liver neoplasms