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Evolution of the East Asian monsoon inferred from environmental magnetic record from Lake Biwa,central Japan

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地球环境学报 2011年第1期 313-313页

作者： Hayashida A Yamamoto T Yasuda M Tanigawa Y Ishikawa N kitagawa H Torii M Haraguchi T takemura k Affiliated Institution Doshisha University Institute of Geothermal Sciences Kyoto University

Lake Biwa,located in central Japan,contains a thick sedimentary sequence deposited in lacustrine or fluvial environments during the *** and magnetostratigraphic analysis of deep-drilling cores from the central basin showed that about 800 m thick sediment has been deposited for the last 1.3 *** uppermost 250 m clay unit has provided important paleoclimate records,which can be correlated to major glacial-interglacial cycles for the last 0.45 ***,the Lake Biwa sediment is expected to offer detailed records of Asian monsoon activity from the Middle Pleistocene to the *** demonstrate that anhysteretic remanent magnetization(ARM),a measure of magnetic mineral content in sediment,provides a good proxy of hydrological changes around Lake Biwa since the last glacial *** low-field magnetic susceptibility is most widely used for stratigraphic correlation of core samples and detection of paleoenvironmental changes,ARM is more sensitive to concentration of ferrimagnetic minerals such as small magnetite *** previous study on a piston-core recovered in 1995 revealed that the ARM increases in the postglacial interval and that the variation in the lower part is likely linked to millennial-scale climate changes during the last glacial *** finding was confirmed by analysis of new piston-cores recovered from other sites in *** ARM records reproducibly extend back to 46 ka,featuring major interstadials of Dansgaard-Oeschger cycles and Heinrich *** ARM record shows variation similar to total organic carbon(TOC) content,suggesting that flux of finegrained magnetite was increased during the post-glacial and interstadial warm periods as well as flux of wash in nutrients and organic matter.A high-resolution pollen analysis showed that the ARM peaks correspond to regional vegetation response with rapid climate changes in the last glacial *** interpret that the increased ARM represents enhanced precipitation pro

关键词： Lake Evolution of the East Asian monsoon inferred from environmental magnetic record from Lake Biwa,central Japan ARM

Influence of Warm Oxide Layer on Wettability and Contact Angle for Heat Transport Devices

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Journal of Mechanics Engineering and Automation 2017年第7期7卷 341-347页

作者： A. takemura k. Yuki A. Sadayuki Department of lntegrated Science and Technology National Institute of Technology Tsuyama College 624-1 Okayama 708-8509 Japan Department of Mechanical Engineering Faculty of Engineering Tokyo University of Science Yamaguchi 756-0084 Japan Department of Mechanical Engineering National Institute of Technology Tsuyama College 624-1 Okayama 708-8509 Japan

Recently, high heat density has become a problem in electronic devices. Therefore, high heat-transfer efficiency is required in copper heat exchangers. Improvement ofwettability is reported to improve the heat-transfer efficiency. In previous studies, copper oxide layer improves the wettability. In this study, we focus on a copper oxide layer produced under warm conditions （from 200 to 300 ℃）, which are suitable oxidation conditions for improving wettability. Experimental results showed that the surface of the specimens was covered by the oxidation layer and took on a black color. Furthermore, the wettability was improved by the warm copper oxide layer. While, the surface roughness was approximately constant to each warm oxidized specimen. Whereat, the warm oxide layer was observed by SEM （sanning electron microscope）. The results from SEM observations showed that the warm copper oxide layer consisted of stacks and combinations of nanoscopic warm oxidation particles. Thus, the warm oxidation layer has nanoscopic surface asperities. It is seemed that these nanoscopic asperities improved the wettability.

关键词： Warm oxide layer heat-transfer efficiency wettability contact angle.

The Zinc Story under High Pressure

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Journal of Minerals and Materials Characterization and Engineering 2019年第5期7卷 354-372页

作者： kenichi takemura Institute of Materials Structure Science (IMSS) High Energy Accelerator Research Organization (KEK) Tsukuba Japan

A historical review is presented on the experimental and theoretical studies on Zn under high pressure. Based on our high-pressure powder x-ray diffraction experiments that have been done for nearly a decade, we describe the structural change of Zn up to 126 GPa at room temperature. Although several experimental and theoretical studies indicated an anomalous change of the c/a axial ratio with pressure, we found no such an anomaly within our experimental uncertainty. Our high-pressure low-temperature experiments up to 18 GPa at 40 k also gave no evidence of the c/a anomaly. We suspect that the pressure-transmitting media played an important role in producing the anomaly. The structural anisotropy of Zn is drastically reduced at high pressures, which would be a general trend for hexagonal close-packed (hcp) metals.

关键词： Zinc High Pressure Crystal Structure Electronic Topological Transition

尾波的场地放大作用及其在S波场地响应中的有效应用

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世界地震译丛 1996年第5期27卷 72-81页

作者： k.kato k.Aki M.takemura 杨宝仁国家地震局地球物理研究所

本文的主题是,研究是否可由尾波测得特定场地的S波响应。我们使用了南加州4个TERRA地学透镜台(PAS,PFO,SVD和GSC)观测到的1992年兰德斯和大熊地震的余震的记录。由于TERRA地学透镜仪的大动态范围,所记录的S波具有宽频带响应,而尾波的持... 详细信息

本文的主题是,研究是否可由尾波测得特定场地的S波响应。我们使用了南加州4个TERRA地学透镜台(PAS,PFO,SVD和GSC)观测到的1992年兰德斯和大熊地震的余震的记录。由于TERRA地学透镜仪的大动态范围,所记录的S波具有宽频带响应,而尾波的持续时间也长。我们研究了震级从3.3至5.4的65次地震的共708个三分量波形。上述4个台中只有SVD台位于第四纪)中积层上,其余各台均位于白垩纪岩石上。我们首先用频谱比方法(Mayeda等,1991;koyanagi等,1992)估算了中心频率为0.75,1.0,1.5,2.0,3.0,4.0和6.0Hz,发震时刻70s后的尾波的场地放大因子。我们发现,径向分量的场地放大因子与横向分量的相似。这种相似性是在预料中的,因为尾波包括由各个方向到台站的反向散射波,所得到的是一种各个方向平均了的场地响应。然后,我们用同样资料组中的直达S波部分进行反演(Andrews,1986),以估算S波的场地放大因子。我们发现,尾波场地响应与S波场地响应相当一致,两者之比不超过1.5。这一发现支持了Tsujiura(1978)的相同的发现,并且证明了尾波可用于测定特定场地对S波的放大作用。正如Aki(1992)和Zeng(1993)理论上所指出的那样,如果我们假定尾波是由S波所支配的,则这种S波的场地响应与尾波的场地响应的一致是可以理解的。

关键词：地震尾波 S波场地响应场地放大

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Comparison of clinicopathological characteristics between resected ampullary carcinoma and carcinoma of the second portion of the duodenum

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World Journal of Gastrointestinal Surgery 2022年第11期14卷 1219-1229页

作者： kohei Nishio kenjiro kimura Akihiro Murata Go Ohira Hiroji Shinkawa Shintaro kodai Ryosuke Amano Shogo Tanaka Sadatoshi Shimizu Shigekazu takemura Akishige kanazawa Shoji kubo Takeaki Ishizawa Department of Hepato-Biliary-Pancreatic Surgery Osaka Metropolitan UniversityOsaka 5458585Japan Department of HepatoBiliary-Pancreatic Surgery Osaka City General HospitalOsaka 5340021Japan

BACkGROUND Few studies compared the oncological and biological characteristics between ampullary carcinoma(AC) and cancer of the second portion of the duodenum(DC-Ⅱ), although both tumors arise from anatomically close *** To elucidate differences in clinicopathological characteristics, especially the patterns of lymph node metastasis(LNM), between AC and DC-Ⅱ.METHODS This was a retrospective cohort study of 80 patients with AC and 27 patients with DC-Ⅱ who underwent pancreaticoduodenectomy between January 1998 and December 2018 in two institutions. Clinicopathological factors, LNM patterns, and prognosis were compared between the two *** The patients with AC and DC-Ⅱ did not exhibit significant differences in 5-year overall survival(66.0% and 67.1%, respectively) and 5-year relapse-free survival(63.5% and 62.2%, respectively). Compared to the patients with DC-Ⅱ, the rate of preoperative biliary drainage was higher(P = 0.042) and the rates of digestive symptoms(P = 0.0158), ulcerative-type cancer(P < 0.0001), large tumor diameter(P < 0.0001), and advanced tumor stage(P = 0.0019) were lower in the patients with AC. The LNM rates were 27.5% and 40.7% in patients with AC and DC-Ⅱ,respectively, without significant difference(P = 0.23). The rates of LNM to hepatic nodes(N-He)and pyloric nodes(N-Py) were significantly higher in patients with DC-Ⅱ than in those with AC(metastasis to N-HE: 18.5% and 5% in patients with DC-Ⅱ and AC, respectively;P = 0.0432;metastasis to N-Py: 11.1% and 0% in patients with DC-Ⅱ and AC, respectively;P = 0.0186)CONCLUSION Although there were no significant differences in the prognosis and recurrence rates between the two groups, metastases to N-He and N-Py were more frequent in patients with DC-Ⅱ than in those with AC.

关键词： Ampulla of Vater Duodenum Lymphatic metastasis pattern Lymphatic metastasis station Lymph node excision Neoplasm Pancreaticoduodenectomy

WONCA研究论文摘要汇编——初级医疗医生行医范围调查问卷设计

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中国全科医学 2015年第35期18卷 4381-4381页

作者：本刊编辑部 Ie k Ichikawa S takemura YC

背景尽管初级医疗属性的相关研究数量呈上升趋势,但患者益处和初级医疗医生行医范围教育方面的研究并不完善,这是因为各国缺乏有效的调查方式。本研究目的是研发和验证"行医范围库"(SPI)量表,并对日本初级医疗机构的医生行医范围进行调... 详细信息

背景尽管初级医疗属性的相关研究数量呈上升趋势,但患者益处和初级医疗医生行医范围教育方面的研究并不完善,这是因为各国缺乏有效的调查方式。本研究目的是研发和验证"行医范围库"(SPI)量表,并对日本初级医疗机构的医生行医范围进行调查。方法问卷的设计包括如下7个阶段:(1)项目生成;(2)使用同意法对每个项目的必要性进行评估;(3)使用德尔菲法对每个项目的重要性进行评估;(4)通过试验测试对项目数量进行限制;(5)进行初步横截面研究,检查因素结构和验证建构效度;(6)内部一致性和类间可靠性评估;(7)外部效度评估。为确认SPI的可解释性,使用一般线性模型对SPI决定因素进行评估。结果在焦点小组提出的359个项目中,有180个项目在德尔菲法步骤后达到表面的明确一致性和内容效度。去掉kappa<0.6的项目之后,120个项目进入初步研究。使用主成分分析法,根据451名初级医疗医生的回答,去掉52个项目。剩下的68个SPI项目包含3个子域:住院患者护理(25个项目)、急救护理和次要程序(27个项目)和非卧床护理(16个项目)。整体SPI的内部一致性和重测信度以及每一个子域都展现了可接受的可靠性。男性、毕业后时间短、在医院工作、亚城市或乡村医疗机构工作、有在偏远地点工作经历和参加学会认证考试的初级医疗医生SPI水平更高。结论自主设计含68个项目的 SPI量表具有令人满意的信度和效度。使用SPI量表进行初级医疗质量评估和教育研究,为将来建立综合高效的医疗系统提供借鉴。

关键词： WONCA 建构效度可解释性子域可靠性评估德尔菲法一般线性模型主成分分析法内容效度内部一致性

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Management of hepatitis B virus infection during treatment for hepatitis B virus-related hepatocellular carcinoma

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World Journal of Gastroenterology 2015年第27期21卷 8249-8255页

作者： Shoji kubo Shigekazu takemura Shogo Tanaka Hiroji Shinkawa Takayoshi Nishioka Akinori Nozawa Masahiko kinoshita Genya Hamano Tokuji Ito Yorihisa Urata Department of Hepato-Biliary-Pancreatic Surgery Osaka City University Graduate School of Medicine

Although liver resection is considered the most effective treatment for hepatocellular carcinoma(HCC), treatment outcomes are unsatisfactory because of the high rate of HCC recurrence. Since we reported hepatitis B e-antigen positivity and high serum hepatitis B virus(HBV) DNA concentrations are strong risk factors for HCC recurrence after curative resection of HBV-related HCC in the early 2000 s, many investigators have demonstrated the effects of viral status on HCC recurrence and post-treatment outcomes. These findings suggest controlling viral status is important to prevent HCC recurrence and improve survival after curative treatment for HBV-related HCC. Antiviral therapy after curative treatment aims to improve prognosis by preventing HCC recurrence and maintaining liver function. Therapy with interferon and nucleos(t)ide analogs may be useful for preventing HCC recurrence and improving overall survival in patients who have undergone curative resection for HBV-related HCC. In addition, reactivation of viral replication can occur after liver resection for HBV-related HCC. Antiviral therapy can be recommended for patients to prevent HBV reactivation. Nevertheless, further studies are required to establish treatment guidelines for patients with HBVrelated HCC.

关键词： Chronic hepatitis B Liver resection Hepatocellularcarcinoma Antiviral therapy Nucleos(t)ide analogs

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小型非道路用共轨直喷式柴油机的技术理念

汽车与新动力 2014年第1期46卷 44-47页

作者： T.Hasegawa T.kuno k.kita A.kai Y.takemura O.Yoshii T.Okazaki H.Miyazaki 孙丹红

近年来,由于对工业用发动机运行平顺性和低燃油耗方面的要求日益提高,因此,要求农业、园林及工程机械等非道路用发动机具有高功率、低燃油耗和低噪声的特点。此外,即使是小型发动机,其电子控制装置的发展趋势也需保持一致。基于这些背景... 详细信息

近年来,由于对工业用发动机运行平顺性和低燃油耗方面的要求日益提高,因此,要求农业、园林及工程机械等非道路用发动机具有高功率、低燃油耗和低噪声的特点。此外,即使是小型发动机,其电子控制装置的发展趋势也需保持一致。基于这些背景,开发了采用共轨燃油喷射系统的新型非道路用直喷式柴油机,以满足上述要求。评述了在小排量非道路用柴油机上采用共轨燃油喷射系统,以及优化燃烧系统和喷油特性的技术。

关键词：直喷式柴油机共轨燃油喷射系统进气涡流喷油参数

计算机辅助检测对肺癌病人肺纤维化的定量分析:与无病生存期的关系

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国际医学放射学杂志 2019年第5期 619-619页

作者： T.Iwasawa k.Okudela T.takemura T.Fukuda S.Matsushita T.Baba 宋晓伟 Department of Radiology Kanagawa Cardiovascular and Respiratory Center

摘要肺癌病人行CT筛查时,10%的病人会出现肺间质异常(ILA),但ILA的组织学表现与病人预后之间的关系尚不明确。目的评估术前CT检查中ILA百分比作为肺癌病人

关键词：无病生存期肺纤维化肺癌病人定量分析