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1985北京国际水泥及混凝土学术会议

作者： yoshihiko ohama Kazuo Sekino College of Engineering Nihon UniversityKoriyamaFukushima-kenJapan Onoda Chemico Corp. TokyoJapan

In recent years, stronger interest has been focused on the development of field application of polymer impregnation for the purpose of improving the durability of various reinforced concrete structures. Field polymer impregnation system is applied as the surface treatment of old or new cast-in-place reinforced concrete structures. The conventional field polymer impregnation system generally consists of base concrete drying, impregnant penetration and polymerization processes. The authors have developed a new labor- and energy-saving system in which the impregnant is penetrated immediately after the drying of the base concrete, and then the polymerization is accomplished by the heat or thermal energy remaining in the dried concrete in a short time. The purpose of this investigation is to establish the practical procedures for such a rapid field polymer impregnation system. In the laboratory tests, base concrete slabs are dried under various conditions by use of an LPG (liquefied petroleum gas) torch burner and a far infrared heater, and penetrated with methyl methacrylate-based impregnant by ponding method, subsequently polymerized by the remaining thermal energy. The behavior of the impregnant under heating conditions and the effects of the impregnant formulations and working life, base concrete temperature and remaining thermal energy on polymer penetration depth are examined. As a result, it is concluded that the polymer penetration depth can be controlled by the working life of the impregnant and the drying temperature-time product of the base concrete regardless of the drying methods and conditions of the base concrete. The temperature-time product expresses the approximate level of the remaining thermal energy. The practical procedures for the rapid field polymer impregnation system is proposed on the basis of the laboratory test results. Typical processes in the proposed procedures are explained in field *** rapid system can provide a polymer penetrati

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碳纤维增强水泥复合材料

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新型炭材料 1991年第1期7卷 27-32页

作者： yoshihiko ohama 李仍元

一、前言近年来用纤维增强剂来改善通用建材水泥和混凝的力学性能如抗张强度,延伸度,抗衡击性能等引起了人们极大的注意。多种多样的纤维包括钢丝、耐碱玻璃纤维、维尼纶、聚丙烯纤维、芳纶以及碳纤维等已被用于此途,并在建材工业中已... 详细信息

一、前言近年来用纤维增强剂来改善通用建材水泥和混凝的力学性能如抗张强度,延伸度,抗衡击性能等引起了人们极大的注意。多种多样的纤维包括钢丝、耐碱玻璃纤维、维尼纶、聚丙烯纤维、芳纶以及碳纤维等已被用于此途,并在建材工业中已经商品化了。这些增强纤维中,碳纤维尽管其价高,由于其高比强度及杨氏模量以及在高碱性环境下的化学惰性,还是吸引人们选它来增强水泥基脆性基体。它们在钢筋表面不像钢丝那样产生锈污染问题。

关键词：碳纤维水泥复合材料

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Strategies for reducing the costs of clean-energy technologies in buildings in Nigeria

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Clean Energy 2020年第4期4卷 349-359页

作者： Samuel Ekung Victor ohama Reginald Ajiero Department of Quantity Surveying Imo State UniversityOwerriNigeria Department of Building University of UyoUyoNigeria

The costs of clean-energy technologies are currently very high and their adoption in buildings is *** study evaluated strategies for improving the cost performance of photovoltaic(PV)electricity applied in buildings in Nigeria using a questionnaire survey involving 415 *** efficacy of each strategy and consensus in respondents’perceptions were determined using Fuzzy Set Theory and Kruskal-Wallis *** top four strategies for achieving PV-cost reduction are mandating green buildings,standardization of building designs and PV components,facilitating import licensing and massive public *** these strategies to improve the PV value chain will increase the supply capacity of clean energy in emerging markets.

关键词： buildings cost reduction photovoltaic sustainable energy sustainable development

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WIDE:A witness-based data priority mechanism for vehicular forensics

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Blockchain(Research and Applications) 2022年第2期3卷 15-24页

作者： Chuka ohama Regio A.Michelin Raja Jurdak Salil S.Kanhere Sanjay Jha University of New South Wales(UNSW) SydneyNSW 2052Australia Queensland University of Technology(QUT) BrisbaneQLD 4000Australia

In this paper,we present a WItness based Data priority mEchanism(WIDE)for vehicles in the vicinity of an accident to facilitate liability *** evaluates the integrity of data generated by these vehicles,called witnesses,in the event of an accident to assure the reliability of data to be used for making liability decisions and ensure that such data are received from credible *** achieve this,WIDE introduces a two-level integrity assessment to achieve end-to-end integrity by initially ascertaining the integrity of data-producing sensors,and validating that data generated have not been altered on transit by compromised road-side units(RSUs)by executing a practical byzantine fault tolerance(pBFT)protocol to reach consensus on data ***,WIDE utilises a blockchain based reputation management system(BRMS)to ensure that only data from highly reputable witnesses are utilised as contributing evidence for facilitating liability ***,we formally verify the proposed framework against data integrity requirements using the Automated Verification of Internet Security Protocols and Applications(AVISPA)with High-Level Protocol Specification Language(HLPSL).Qualitative arguments show that our proposed framework is secured against identified security attacks and assures the reliability of data utilised for making liability decisions,while quantitative evaluations demonstrate that our proposal is practical for fully autonomous vehicle forensics.

关键词： Fully autonomous vehicles Electronic control units Blockchain Witness Forensics Security Consensus Fairness Automated verification of internet security protocols and applications(AVISPA)

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Decompositions of Symmetry Using Generalized Linear Diagonals-Parameter Symmetry Model and Orthogonality of Test Statistic for Square Contingency Tables

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Open Journal of Statistics 2013年第6期3卷 9-13页

作者： Kouji Yamamoto Motoki ohama Sadao Tomizawa Department of Information Sciences Faculty of Science and Technology Tokyo University of Science Chiba Japan Department of Medical Innovation Osaka University Hospital Osaka Japan

For square contingency tables with ordered categories, the present paper gives several theorems that the symmetry model holds if and only if the generalized linear diagonals-parameter symmetry model for cell probabilities and for cumulative probabilities and the mean nonequality model of row and column variables hold. It also shows the orthogonality of statistic for testing goodness-of-fit of the symmetry model. An example is given.

关键词： umulative Probability Global Symmetry Linear Diagonals-Parameter Symmetry Mean Equality Ordinal Category Orthogonal Test Statistic

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HsfAld, a Protein Identified via FOX Hunting Using Thellungiella salsuginea cDNAs Improves Heat Tolerance by Regulating Heat-Stress-Responsive Gene Expression

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Molecular Plant 2013年第2期6卷 411-422页

作者： Yukari Higashi Naohiko ohama Tomoko Ishikawa Taku Katori Ayaka Shimura Kazuya Kusakabe Kazuko Yamaguchi-Shinozaki Junko Ishida Maho Tanaka Motoaki Seki Kazuo Shinozaki Yoichi Sakata Takahisa Hayashi Teruaki Taji Department of Bio-Science Tokyo University of Agriculture 1-1-1 Sakuragaoka Setagaya Tokyo 156-8502 Japan Graduate School of Agriculture and Life Sciences University of Tokyo Tokyo 113-8657 Japan RIKEN Yokohama Institute 1-7-22 Suehiro-cho Tsururni-ku Yokohama 230-0045 Japan

Thellungiella salsuginea （formerly T. halophila）, a species closely related to Arabidopsis （Arabidopsis thali-ana）, is tolerant not only to high salt levels, but also to chilling, freezing, and ozone. Here, we report that T. salsuginea also shows greater heat tolerance than Arabidopsis. We identified T. salsuginea HsfAld （TsHsfAld） as a gene that can confer marked heat tolerance on Arabidopsis. TsHsfAld was identified via Full-length cDNA Over-eXpressing gene （FOX） hunt-ing from among a collection of heat-stress-related T. salsuginea cDNAs. Transgenic Arabidopsis overexpressing TsHsfAld showed constitutive up-regulation of many genes in the Arabidopsis AtHsfA1 regulon under normal growth tempera-ture. in Arabidopsis mesophyll protoplasts, TsHsfAld was localized in both the nucleus and the cytoplasm. TsHsfAld also interacted with AtHSP90, which negatively regulates AtHsfAls by forming HsfA1-HSP90 complexes in the cytoplasm. It is likely that the partial nuclear localization of TsHsfAld induced the expression of the AtHsfAld regulon in the transgenic plants at normal temperature. We also discovered that transgenic Arabidopsis plants overexpressing AtHsfAldwere more heat-tolerant than wild-type plants and up-regulated the expression of the HsfAld regulon, as was observed in TsHsfAld-overexpressing plants. We propose that the products of both TsHsfAld and AtHsfAld function as positive regulators of Arabidopsis heat-stress response and would be useful for the improvement of heat-stress tolerance in other plants.

关键词： Thellungiella salsuginea heat-stress tolerance HsfA1 FOX hunting.

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Establishment of mouse intestinal myofibroblast cell lines

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World Journal of Gastroenterology 2013年第17期19卷 2629-2637页

作者： Hideyoshi Kawasaki Takashi ohama Masatoshi Hori Koichi Sato Laboratory of Veterinary Pharmacology Joint Faculty of Veterinary Medicine Yamaguchi University Department of Veterinary Pharmacology Graduate School of Agriculture and Life Sciences the University of Tokyo

AIM:To establish novel intestinal myofibroblast (IMF) cell lines from mouse colonic mucosa and investigate their biological characters. METHODS:Primary IMFs were isolated from mucosal tissues of mouse colon that was denuded of epithelial cells and smooth muscle layer. For immortalization, primary IMFs were transfected with simian virus 40 large T antigen (designated as LmcMF). We also isolated some primary IMFs that spontaneously became immortalized without transfection (designated as SmcMF). To check immortality and normality of these cells, we examined their proliferative ability and contact inhibition. Moreover, the expression levels of proteins characterizing IMFs [including α-smooth muscle actin (α-SMA), vimentin, desmin, and type Ⅰ collagen] and proteins associated with the immune response [such as toll-like receptor 4 (TLR-4), CD14, MD2, IκBα, and p-p38] were determined by Western blotting. The localization of several myofibroblast protein markers was also detected by immunofluorescence staining. RESULTS:The cell growth assay results show that both LmcMF and SmcMF cells proliferated logarithmically at least up to passage 20. In addition, the contact inhibition assays show that LmcMF and SmcMF stopped growing after the cells reached confluence. These data suggest that these 2 types of cells were immortalized without losing contact inhibition of growth. Moreover, both LmcMF and SmcMF, like primary IMFs, showed spindle-shaped appearance. The expression levels of key myofibroblast protein markers, including α-SMA, vimentin, and desmin, were also examined by the Western blotting and immunofluorescence analyses. Our results show that these cells were positive for α-SMA and vimentin, but not desmin, as well as that both LmcMF and SmcMF expressed type Ⅰ collagen at a lower level than primary IMFs. Finally, we investigated the expression level of lipopolysaccharide (LPS) receptor-related proteins, as well as the response of the cells to LPS treatment. We found that th

关键词： Cell line Colon Lipopolysaccharide Mouse Myofibroblast

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使用重新分散聚合物粉末的聚合物—改性砂浆的性能

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国外建筑与城乡建设 1995年第2期 7-13页

作者： ohama,Y 肖力光

本研究的目的是为了比较使用聚合物分散体的聚合物－改性砂浆与使用可重新分散的聚合物粉末的聚合物－改性砂浆的质量。

关键词：聚合物水泥改性砂浆聚合物粉末性能

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聚合物纤维增强水泥的强度性能

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建筑材料科学研究院院刊 1987年第5期 42-46页

作者： K.Demura Y ohama M.Endo 徐亚萍陈鹤云 College of Engineering Nihon University Koriyama Fukusshima-ken Tapan College of Engineering Nihon University Koriyama Fukusshima-ken Tapan

广泛应用石棉纤维作为石棉水泥制品的增强材料已有很久的历史。由于高品位长纤维石棉资源的耗尽和石棉纤维对人体健康带来的隐患,近年来,人们十分期望发展能代替石棉纤维的代用纤维,代用纤维显示出很好的发展前景,聚合物纤维也被考虑为... 详细信息

广泛应用石棉纤维作为石棉水泥制品的增强材料已有很久的历史。由于高品位长纤维石棉资源的耗尽和石棉纤维对人体健康带来的隐患,近年来,人们十分期望发展能代替石棉纤维的代用纤维,代用纤维显示出很好的发展前景,聚合物纤维也被考虑为这样的代用纤维。本研究的目的是弄清聚合物纤维增强水泥强度性能。本论文中,用硅灰和减水剂使聚合物纤维在水泥砂浆中均匀分散。用聚酰胺、聚丙烯腈和聚乙烯醇纤维制备聚合物纤维增强水泥,其水灰比为30％、硅灰比为40％、减水剂用量为水泥重量的4％、纤维的体积含量为0,2.5,和5.0％。用聚合物纤维增强水泥制作棱柱体试件的尺寸为40×40×160mm,试件首先在温度20℃、相对湿度80％的湿空气中养护一天,然后在60℃水中养护六天。养护后的试件进行抗弯强度试验,记录弯曲荷载—挠度曲线以计算弯曲韧性及等效弯曲强度。将经抗弯试验破坏后的部分试件进行抗压强度试验,从试验结果得到的结论概括如下: (1)除聚乙烯醇纤维增强水泥以外,聚合物纤维增强水泥的强度性能如抗弯和抗压强度、弯曲韧性和等效弯曲强度随纤维含量的增加有显著的改善; (2)聚乙烯醇纤维增强材料对聚合物纤维增强水泥的强度性能几乎没有什么影响; (3)除聚乙烯醇纤维外,聚酰胺和聚丙烯腈等聚合物纤维可用作石棉纤维的代用纤维。

关键词：纤维增强水泥流动度弯曲荷载弯曲强度纤维含量抗弯强度维纶聚乙烯醇纤维弯曲韧性大分子化合物聚合物强度性能

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Therapeutic efficacy of ramucirumab after lenvatinib for post-progression treatment of unresectable hepatocellular carcinoma

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Gastroenterology Report 2021年第2期9卷 133-138,I0002页

作者： Atsushi Hiraoka Takashi Kumada Toshifumi Tada Chikara Ogawa Joji Tani Shinya Fukunishi Masanori Atsukawa Masashi Hirooka Kunihiko Tsuji Toru Ishikawa Koichi Takaguchi Kazuya Kariyama Ei Itobayashi Kazuto Tajiri Noritomo Shimada Hiroshi Shibata Hironori Ochi Kazuhito Kawata Hidenori Toyoda Hideko ohama Kazuhiro Nouso Akemi Tsutsui Takuya Nagano Norio Itokawa Korenobu Hayama Taeang Arai Michitaka Imai Yohei Koizumi Shinichiro Nakamura Kojiro Michitaka Yoichi Hiasa Masatoshi Kudo Gastroenterology Center Ehime Prefectural Central HospitalEhimeJapan Department of Gastroenterology and Hepatology Ogaki Municipal HospitalGifuJapan Department of Internal Medicine Himeji Red Cross HospitalHyogoJapan Department of Gastroenterology and Hepatology Takamatsu Red Cross HospitalTakamatsuJapan Department of Gastroenterology and Hepatology Kagawa universityKagawaJapan Department of Gastroenterology Osaka Medical CollegeOsakaJapan Division of Gastroenterology and Hepatology Department of Internal MedicineNippon Medical SchoolTokyoJapan Department of Gastroenterology and Metabology Ehime University Graduate School of MedicineEhimeJapan Center of Gastroenterology Teine Keijinkai HospitalSapporoJapan Department of Gastroenterology Saiseikai Niigata HospitalNiigataJapan Department of Hepatology Kagawa Prefectural Central HospitalTakamatsuJapan Department of Gastroenterology Okayama City HospitalOkayamaJapan Department of Gastroenterology Asahi General HospitalAsahiJapan Department of Gastroenterology Toyama University HospitalToyamaJapan Division of Gastroenterology and Hepatology Otakanomori HospitalKashiwaJapan Department of Gastroenterology Tokushima Prefectural Central HospitalTokushimaJapan Hepato-biliary Center Matsuyama Red Cross HospitalMatsuyamaJapan Department of Hepatology Hamamatsu University School of MedicineHamamatsuJapan Department of Gastroenterology Kindai UniversityOsakaJapan

Background:Lenvatinib is used for unresectable hepatocellular carcinoma(u-HCC)as first-line,as well as second-and third-line therapy in *** evaluated the therapeutic efficacy of newly developed ramucirumab when given after lenvatinib for post-progression ***:Of 385 patients with u-HCC and treated with lenvatinib at 16 different institutions in Japan between May 2018 and January 2020,28 who received ramucirumab as the next treatment were enrolled and therapeutic responses were evaluated in a retrospective ***:The median age of the 28 patients given ramucirumab was 70 years and the median albumin-bilirubin score *** the 28 patients,23 were male,21 were classified as Child-Pugh A and 7 as Child-Pugh B,and 25 were Barcelona Clinic Liver Cancer Stage *** was given as second-line therapy in 14,third-line in 9,and fourth-line in *** response was obtained in only 26 patients;the objective response rate was 3.8%(1/26)and the disease-control rate was 42.3%(11/26),with a median period to progression of 2.0 *** reasons for discontinuation of ramucirumab were progression of disease in 16 and Grade 3 adverse events(gastrointestinal bleeding,ascites)in ***:The anticipated therapeutic efficacy of ramucirumab for post-progression treatment following lenvatinib was not seen in our early experience.

关键词： hepatocellular carcinoma ramucirumab lenvatinib sorafenib

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