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Statistics of oxidation resistance of Ni-(0-15)Co-(8-15)Cr-(0-5)Mo-(0-10)W-(3-8)Al-(0-5)Ti-(0-10)Ta-0.1C-0.01B superalloys at 1000℃ by compositional variations

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Rare Metals 2020年第8期39卷 918-927页

作者： Si-Jun Park Kyu-Hyuk Lee Seong-Moon Seo hi-Won Jeong Young-Soo Yoo HeeJin Jang Multi-Material Research Center Gwangju-Jeonnam DivisionKorea Automotive Technology InstituteGwangju 62207Republic of Korea Department of Advanced Materials Engineering Chosun UniversityGwangju 61452Republic of Korea high Temperature Materials Group Korea Institute of Materials ScienceChangwon 51508Republic of Korea Department of Materials Science and Engineering Chosun UniversityGwangju 61452Republic of Korea

The effects of alloying elements(Co,Cr,Mo,W,Al,Ti,and Ta)on the oxidation resistance of Ni-(0-15)Co-(8-15)Cr-(0-5)Mo-(0-10)W-(3-8)Al-(0-5)Ti-(0-10)Ta-0.1 C-0.01 B alloys were *** sample compositions were designed by the Box-Behnken method of design of experiments(DOE).The alloying elements show complicated effects on the mass gain due to oxidation,depending on the alloy *** reduces the mass gain *** other elements except Al do not appear to exert a strong effect on the oxidation rate on average,but their influences are shown clearly in the alloys with a low Al ***,W,and Ta reduce the oxidation rate,while Cr,Mo,and Ti promote *** is the most effective element in reducing the oxidation rate of the alloy with a low Al *** is confirmed that a continuous Al2O3 layer is essentially required for high oxidation *** oxide scale of easily oxidized alloys has various oxides such as NiCr2O4,NiAl2O4,NiO,Cr2O3,CrTaO4,and TiO2.

关键词： high temperature oxidation Alloy composition Ni-based superalloy Oxidation resistance Design of experiments

Praziquantel efficacy against Schistosoma mansoni among hiV-1 infected and uninfected adults living in fishing villages along Lake Victoria, Northwest Tanzania

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Infectious Diseases of Poverty 2014年第1期3卷 440-448,439页

作者： Humphrey D Mazigo David W Dunne Safari M Kinung’hi Fred Nuwaha Department of Medical Parasitology and Entomology School of MedicineCatholic University of Health and Allied SciencesP.O.Box 1464MwanzaTanzania Department of Disease Control and Environmental Health School of Public HealthCollege of Health SciencesMakerere UniversityP.O.Box 7072KampalaUganda Department of Pathology Division of Microbiology and ParasitologyCambridge UniversityTennis Court RoadCambridge CB21QPUK National Institute for Medical Research Mwanza Research CentreP.O.Box 1462 MwanzaTanzania

Background:Animal studies have demonstrated that functional immune responses,as determined by the levels of CD4+cell counts and anti-schistosome antibodies responses,determine the efficacy of *** on this evidence,it has been hypothesised that the immunodeficiency effects of the human immunodeficiency virus(hiV)-1 infection may affect the efficacy of praziquantel in co-infected human ***,the present study assessed the efficacy of praziquantel by comparing parasitological cure rates and the reduction in infection intensity in hiV-1 seronegative individuals infected with *** and hiV-1 seropositive individuals co-infected with ***,following treatment with a single oral dose of ***:This was a prospective longitudinal study which included,at baseline,555 *** infected adults aged 21-55 years,who were either co-infected or not with hiV-1 and who lived in fishing villages along Lake Victoria in Northwest *** individuals were treated with a single oral dose of praziquantel(40 mg/kg)and,at 12 weeks,single stool samples were obtained and examined for *** eggs using the Kato-Katz *** prick and venous blood samples were collected for hiV-1 screening and CD4+cell ***:The parasitological cure rate did not differ significantly from the hiV-1 serostatus(P=0.12):among the co-infected individuals,the cure rate was 48.3%(14/29),and among the individuals infected only with ***,the cure rate was 62.6%(329/526).The egg reduction rate did not vary with the hiV-1 serostatus(P=0.22):77.22%for hiV-1 seronegative and 75%for hiV-1 seropositive *** level of CD4^(+) cell counts(median 228 cells/μL:range 202-380 cells)did not influence the cure rate(P=0.23)or the reduction in the intensity of the infection(P=0.37).Conclusion:The hiV-1 infection per se or its moderate immunodeficiency effects,demonstrated by the range of CD4^(+) cell counts observed in co-infected individuals,d

关键词： hiV-1 S.mansoni Co-infection Praziquantel Efficacy Tanzania

土工格栅加筋土挡土墙设计参数的弹塑性有限元研究

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岩土工程学报 2004年第5期26卷 668-673页

作者：刘华北 Ling hi 清华大学土木工程系北京100084 哥伦比亚大学土木工程与工程力学系美国纽约10027

土工格栅加筋土挡土墙在水利、交通及城建等领域的应用越来越广泛。在模拟日本PWRI原型实验墙的基础上 ,应用弹塑性有限元法研究该种结构的各项设计参数 ,包括土的性质、加筋长度、加筋层间隔以及土体与面板的相互作用特性等。为了能够... 详细信息

土工格栅加筋土挡土墙在水利、交通及城建等领域的应用越来越广泛。在模拟日本PWRI原型实验墙的基础上 ,应用弹塑性有限元法研究该种结构的各项设计参数 ,包括土的性质、加筋长度、加筋层间隔以及土体与面板的相互作用特性等。为了能够准确的描述加筋土挡土墙结构的性状 ,应用先进的弹塑性模型模拟墙体各个组成部分 ,其中土体用可以描述土体压力相关特性的广义塑性模型模拟 ,土工格栅应用弹塑性边界面模型模拟 ,而土与结构的相互作用应用可模拟滑移、脱开以及闭合的有厚度薄层滑移单元模拟。通过有限元分析。

关键词：土工格栅加筋土挡土墙有限元法弹塑性设计参数

Role of Art in Tohoku After the Earthquake and Tsunami

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Sociology Study 2019年第1期9卷 29-34页

作者： Mina ohba Shanghai Academy of Fine Arts Shanghai China

On March 11, 2011, a major earthquake and tsunami occurred in Japan, mainly affecting the Tohoku region and causing a meltdown at the Fukushima Daiichi nuclear power plant. This disaster not only caused great damage to the affected areas but also had a serious impact on Japanese politics, economy, and society in general. The art field was no exception;Japanese artists began to consider “What art can do?” after the disaster and this question began to be a new theme of Japanese contemporary art. Artists began to find ways to engage with the affected communities, dealing directly with social problems and political issues.

关键词： Japanese contemporary art Fukushima socially engaged art aftermath of the 2011 Tohoku earthquake and tsunami

Study of sexual behaviour in relation to sexually transmitted infections(STIs) among Nigerian undergraduates

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Asian Pacific Journal of Tropical Medicine 2009年第6期2卷 71-77页

作者： Agan TU Ekabua JE Nyong PP Ndifon WO Itam hi Department of Obstetrics & Gynaecology University of Calabar Nigeria Department of Community Medicine

Objective:To determine their reproductive health behaviour concerning fidelity and psychosocial intimacy in the face of current trends in sexually transmitted infections(STIs) and human immunodeficiency virus(hiV)/ acquired immune deficiency syndromes(AIDS) ***:A cross-sectional comparative male/female cohort study using a semi-structured questionnaire to interview sexually activity of undergraduates in University of Calabar(UNICAL) was conducted over a three(3) month period in *** used were number of sexual partners,frequency of sexual intercourse in the 6 months preceding,knowledge of last menstrual period(LMP),methods of self-protection against STIs,number of unwanted pregnancies terminated,and contraceptive ***:Of the 1 337 respondents,648 out of 684 males(94.7%) and 543 out of 653 females (83.2%) had multiple sex *** gender difference was statistically significant(P hibited spontaneous sexual contact *** difference in frequency of intercourse between both groups was not statistically significant(P >0.05).While 275(42.0%) of the females could state the exact last menstrual period(LMP),only 14(2.1%) males could remember their mates LMP,and 496(72.5%) of males did not know anything about mates’menstrual *** was no statistical significance difference(P >0.05 ) between both groups in their safe sex practices. One hundred and sixty three(23.8%) male and one hundred and forty one(22.8%) females used condoms,while 347(50.7%) of male and 337(51.6%) of females did *** hundred and seventy six(40.0%) of males’mates had terminated pregnancies and three hundred and forty eight(53.3%) of female respondents admitted doing ***(4.60%) females terminated pregnancy more than six *** had more knowledge of contraceptives but males used

关键词： Sexual intimacy Undergraduates Safe-sex

Pea leafminer Liriomyza huidobrensis (Diptera: Agromyzidae) uses vibrational duets for efficient sexual communication

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Insect Science 2019年第3期26卷 510-522页

作者： Jin Ge Jia-Ning Wei Ding-Jie Zhang Chun hi De-Zhi Zheng Le Kang State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of Zoology Chinese Academy of Sciences Beijing China University of Chinese Academy of Sciences Beijing China Key Laboratory of Zoological Systematics and Evolution Institute of Zoology Chinese Academy of Sciences Beijing China School of Instrumentation Science & Optoelectronics Engineering Beihang University Beijing China Beijing Institutes of Life Science Chinese Academy of Sciences Beijing China

The pea leafminer (Liriomyza huidobrensis) is a notorious pest of vegetables and ornamental plants worldwide. Despite a large number of studies on its biology and ecology, the courtship behavior and sexual communication of this species remain unclear. Here, we studied vibrational communication in the sexual interaction of the pea leafminer. On host plant leaves, females and males behaviorally displayed the bobbing-quivering alternation, which finally led to copulation. Moreover, records of laser vibrometry revealed threesignal duets underlying the behavioral alternation. Sexually mature males spontaneously emitted calls (MCs) to initiate the duets. The females rapidly responded to MCs by emitting replies (FRs) that are longer in duration. The FRs further triggered male replies (MRs) in their search for potential partners. Leafminer-produced vibrational signals convey efficient information to partners and generate pair formation on stretched substrates, such as plant leaves and nylon mesh, but cannot elicit responses on dense substrates, such as glass and plastic. Vibrational playbacks of both MCs and FRs can elicit replies in females and males, respectively. This study completely characterizes substrate-borne vibrational duets in a dipteran insect. The discovery of vibrational sex signals in the pea leafminer provides new insights for the development of novel approaches to control the pest and its relative species.

关键词： biotremology courtship behavior Liriomyza vibrational communication

miR-23a promotes invasion of glioblastoma via HOXD10-regulated glial-mesenchymal transition

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Signal Transduction and Targeted Therapy 2018年第1期3卷 1-10页

作者： Kazuhiro Yachi Masumi Tsuda Shinji Kohsaka Lei Wang Yoshitaka Oda Satoshi Tanikawa Yusuke ohba Shinya Tanaka Department of Cancer Pathology Faculty of MedicineHokkaido UniversitySapporoJapan Global Station for Soft Matter Global Institution for Collaborative Research and EducationHokkaido UniversitySapporoJapan Institute for Chemical Reaction Design and Discovery(WPI-ICReDD) Hokkaido UniversitySapporoJapan Department of Cell Physiology Faculty of MedicineHokkaido UniversitySapporoJapan Present address:Division of Cellular Signaling National Cancer Center Research InstituteTokyoJapan

Glioblastoma is the most aggressive and invasive brain tumor and has a poor prognosis;elucidating the underlying molecular mechanisms is essential to select molecular targeted ***,we investigated the effect of microRNAs on the marked invasiveness of glioblastoma.U373 glioblastoma cells were infected with 140 different microRNAs from an OncomiR library,and the effects of the invasion-related microRNAs and targeted molecules were investigated after repeated Matrigel invasion *** of the OncomiR library identified miR-23a as a key regulator of glioblastoma *** six glioblastoma cell lines,a positive correlation was detected between the expression levels of miR-23a and invasiveness.A luciferase reporter assay demonstrated that homeobox D10(HOXD10)was a miR-23a-target molecule,which was verified by high scores from both the PicTar and miRanda *** expression of miR-23a induced expression of invasion-related molecules,including uPAR,RhoA,and RhoC,and altered expression of glial-mesenchymal transition markers such as Snail,Slug,MMP2,MMP9,MMP14,and E-cadherin;however,these changes in expression levels were reversed by HOXD10 ***,miR-23a significantly promoted invasion of glioblastoma cells with polarized formation of focal adhesions,while exogenous HOXD10 overexpression reversed these ***,we identify miR-23a-regulated HOXD10 as a pivotal regulator of invasion in glioblastoma,providing a novel mechanism for the aggressive invasiveness of this tumor and providing insight into potential therapeutic targets.

关键词： HOXD10 invasion miR

Preparation, Characterization of Superacid SO_4^(2-)/ZrO_2-SiO_2 and Its Activity on Catalytic Synthesis of Methyl p-Nitrobenzoate

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Journal of Wuhan University of Technology(Materials Science) 2014年第5期29卷 895-899页

作者：王刚 TAO Liya HOU Xin CAO hi DONG Cheng NIE Wo XU Jun 张立庆 College of Biological and Chemical Engineering Zhe Jiang University of Science and Technology

Solid superacid SO42-/ZrO2-SiO2 was prepared by dip-impregnation method, and its catalytic activity was tested with esterification of p-nitrobenzoic acid and methanol. The optimum conditions were also found, that is, the molar ratio between silica and zirconia was 10：1, the calcination temperature was 550 ℃ and the soaked consistency of H2SO4 was 1.0 mol.L-1. Under the conditions that the ratio of methanol to aeid（mL/ g） was 12：1, the amount of catalyst was 0.5 g, the reaction time was 5 h and the stirring speed was 800 ***-1, the yield of methyl p-nitrobenzoate could reach up to 90.5%. Then the characterizations of cataslyst, including the acidity and types of acidic centers, specific surface area and surface structure was respectively examined by Hammer indicator, in-situ pyridine IR, BET method, FT-IR（KBr）, transmission electron microscope （TEM）, and X-ray diffraction （XRD）. The results showed that the catalyst SO42-/ZrO2-SiO2 was superacid with high specific surface area due to Ho〈-12.70. It contained acidic sites of Lewis and BrФnsted, and its surface structure changed after esterification. The zirconia crystal was mainly tetragonal and silica crystal was not found.

关键词： solid superacid methyl p-nitrobenzoate in-situ pyridine IR X-ray diffraction

Practical Application of a Tongue-Operated Joystick Device with Force Feedback Mechanism

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Intelligent Control and Automation 2019年第3期10卷 90-106页

作者： Shinya Kajikawa Taku ohba Department of Mechanical Engineering and Intelligent Systems Tohoku Gakuin University Tagajo Japan THK CO. LTD Shibaura Tokyo Japan

The human tongue has superior movement and tactile sensations. For individuals with severe disabilities, a tongue operated interface device can be used to operate life-support equipment, such as powered wheelchairs and robotic manipulators. A joystick-type device can directly translate various tongue motions to external equipment behavior. In addition, the user can interactively communicate with the equipment by tactile feedback. This helps the user to control the equipment safely and skillfully. Considering these factors, in a previous study [1], we developed a novel tongue-operated joystick device with reaction force feedback mechanism. We described the design process including the analysis of human tongue movement and tactile sensations and showed fundamental performances of reaction force feedback with the prototype device. In this study, we discuss the shape of the operational part that is used by the tongue. Two types of operational tools are prepared and their operability and perception of reaction force feedback are compared. Furthermore, we confirm the effectiveness of reaction force feedback to operate the joystick device safely and skillful controlling a mobile robot in an unknown environment.

关键词： Tongue Joystick Tactile Sensation Mobility Reaction Force Feedback