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Cluster and TC-1 observation of magnetic holes in the plasma sheet

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Cluster and TC-1 observation of magnetic holes in the plasma...

第十四届全国日地空间物理学术研讨会

作者： M.W.dunlop A.P.Walsh H.Reme C.Carr E.Lucek A.Fazakerley Rutherford Appleton Laboratory Didcot OX11 0QX UK Mullard Space Science Laboratory University College London Holmbury St.Mary Dorking Surrey RH5 6NT UK Université de Toulouse

Magnetic holes with relatively small scale sizes, detected by Cluster and TC-1 in the magnetotail plasma sheet, are studied in this paper. It is found that these magnetic holes are spatial structures and they are not magnetic depressions generated by the flapping movement of the magnetotail current sheet. Most of the magnetic holes (93%) were observed during intervals with B z larger than B x, i.e., they are more likely to occur in a dipolarized magnetic field topology. For the randomly selected plasma sheet crossing events there are only 31% of the cases have the magnetic field with Bz larger than Bx, suggesting that the occurrence of magnetic holes might have a close relationship with the dipolarization process and/or a perturbed magnetosphere. The magnetic holes typically have a scale size comparable to the local proton Larmor radius and are accompanied by an electron flux enhancement at 90°pitch angle. It is also shown that most of the magnetic holes occur in the marginally mirror-stable environments;however, whether the plasma sheet magnetic holes are generated by the mirror instability related to ions or not is unknown. Comparison of ratios, scale sizes and propagation direction of magnetic holes detected by Cluster and TC-1 suggests that magnetic holes observed in the vicinity of TC-1 orbit (-12Re) are likely further developed than those observed by Cluster (-18Re).

关键词： magnetic holes mirror mode structures plasma sheet dipolarization

Multi-Spacecraft Observation of a High-Speed Flow Event at the Dayside Magnetopause for Strong IMF By: A preliminary Study

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Multi-Spacecraft Observation of a High-Speed Flow Event at t...

第十一届全国日地空间物理学术讨论会

作者： M.W.dunlop C.M.Carr K.H.Glassmeier H.Reme A.Fazakerley Space Sciences Division RAL Oxford UK Max-Planck-Institute for Solar System Research Germany IGM TU Braunschweig Germany CNSR France MSSL UK

＜正＞At about 0330UT on February 23, 2005, Cluster was located at about （9.0,1.6,7.0）Re（GSM）;the GSM locations of Double Star TC-1 and TC2 at 0430UT were about （10.4,0.4,2.1）Re and about （0.5,0.1,-1.4）Re in the low-altitude cusp, respectively. Inside the dayside magnetosheath close to the magnetopause, Bxabout 0, Bz was positive with the maximum being less than 20nT, and By≈-50nT. During 0320-0340 Cluster four spacecraft were traversing through the magnetopause and observed pronounced plasma flow in the magnetospheric boundary layer. The flow speed was over 370 km/s, much higher than the background magnetosheath flow and directed poleward and duskward. Preliminary analysis shows that this high-speed flow may possibly manifest a reconnection event. In the meantime, TC-1 at the low-latitude also observed high-speed flow when the satellite entered the LLBL for a short time interval. The flow was basically along the +y-direction and much higher than the background magnetosheath flow. Interesting enough, just within the time period of Cluster measurement of high-speed flow, the IMAGE FUV observed both proton and electron aurora brightening on the duskside of polar ionosphere. One hour later around 0440UT, TC-1 was crossing the magnetopause from the magnetosphere toward the magnetosheath. The spacecraft encountered with high-speed flow in the LLBL and an FTE in the magnetosheath. Of particular interest are the facts that just in the time period of TC-1 observation of high-speed flow, TC-2 detected sharp energetic electron enhancements and the IMAGE FUV also saw both proton and electron aurora brightening on the duskside of polar ionosphere. In addition, TC-2 also detected an energetic electron burst at the time when TC-1 encountered the FTE. Implications of this multi-spacecraft observation of a high-speed flow event are discussed in this paper. The possible global reconnection pattern at the dayside magnetopause is also contemplated.

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醛糖还原酶cDNA转染的CHO细胞株的建立及其基因表达与生化特性

作者： (英)扶霞·邓洛普(Fuchsia dunlop)

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中华内分泌代谢杂志 1998年第6期14卷 380-382页

作者：严海东齐今吾中国医科大学第一临床学院内科澳大利亚皇家墨尔本医院内科

目的建立一内含人醛糖还原酶（ｈＡＲ）ｃＤＮＡ的细胞株，并研究其在高葡萄糖环境中的基因表达及生化特性。方法将全长ｈＡＲｃＤＮＡ基因插入质粒载体ｐｃＤＮＡｎｅｏ中，并将ＡＲ正义、反义构建以及ｐｃＤＮＡｎｅｏ载体本身分别转... 详细信息

目的建立一内含人醛糖还原酶（ｈＡＲ）ｃＤＮＡ的细胞株，并研究其在高葡萄糖环境中的基因表达及生化特性。方法将全长ｈＡＲｃＤＮＡ基因插入质粒载体ｐｃＤＮＡｎｅｏ中，并将ＡＲ正义、反义构建以及ｐｃＤＮＡｎｅｏ载体本身分别转染至中华仓鼠卵巢（ＣＨＯ）细胞中。用放免法测定这些细胞株在高糖环境中的山梨醇水平。用Ｎｏｒｔｈｅｒｎ杂交检测其ｍＲＮＡ表达，并用分光光度法检测ＡＲ活性。结果有四株ＡＲ正义构建的细胞株显示了高山梨醇水平。随机将其中一株细胞作进一步分析，发现该细胞株具有ＡＲｍＲＮＡ表达，并且在高糖环境中ＡＲ活性亦显著升高。以上升高的山梨醇及酶活性均被ＡＲ抑制剂ＨＯＥ８４３所抑制。结论本研究结果表明已成功地建立了一细胞系统，它为进一步研究ＡＲ在糖尿病并发症发病机理中的作用提供了手段。

关键词：醛糖还原酶糖尿病并发症基因转染

Radial distribution of magnetic field in magnetotail current sheet center:Cluster and TC-1 observations

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Radial distribution of magnetic field in magnetotail current...

中国空间科学学会空间物理学专业委员会第十五届全国日地空间物理学研讨会

作者： Z.J.Rong W.X.Wan C.Shen M.W.dunlop T.L.Zhang CAS Key Laboratory of Ionospheric Environment Institute of Geology and GeophysicsChinese Academy of Sciences Beijing National Observatory of Space Environment Institute of Geology and GeophysicsChinese Academy of Sciences State Key Laboratory of Space Weather Center for Space Science and Applied ResearchChinese Academy of Sciences Rutherford Appleton Laboratory ChiltonDIDCOTOxfordshire OX11 0QXUK CAS Key Laboratory of Geospace Environment University of Science and Technology of China Space Research Institute Austrian Academy of SciencesGrazAustria

The radial distribution of magnetic field in magnetotail current sheet(CS)determines the background conditions of plasma distribution and evolution in tail CS,so that it is a key issue for further exploring the triggering location of substorm *** the joint magnetic field data of Cluster-3(Samba)during 2001-2009 and TC-1 during 2004 in the magnetotail current sheets center,the dependence of the radial distribution of magnetic field within the radial distance 6RE

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加拿大的空间机器人——从国际空间站上的灵巧作业机器人到行星探测机器人

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控制工程（北京） 2001年第2期 22-29页

作者： S.Beland E.Dupuis J.dunlop 潘科炎

在过去二三十年中,加拿大政府大力支持空间机器人设备和技术的开发。通过航天飞机遥控机械臂系统(SRMS,即Canadarm)和活动服务系统(MSS,即加拿大为美国国际空间站研制的高级空间机器人)的研制,大大增强了加拿大的技术实力,使加拿大在开... 详细信息

在过去二三十年中,加拿大政府大力支持空间机器人设备和技术的开发。通过航天飞机遥控机械臂系统(SRMS,即Canadarm)和活动服务系统(MSS,即加拿大为美国国际空间站研制的高级空间机器人)的研制,大大增强了加拿大的技术实力,使加拿大在开发下一代空间机器人进程中又跃上一个台阶。实际上,加拿大航天局(CSA)和加拿大航天工业界已经着手开发未来行星际探测任务所用的机器人技术及设备,包括火星和月球探测任务所用的机器人。本文将对加拿大机器人从SRMS到MSS,直至行星探测机器人的技术发展过程作一总结,着重介绍目前正在开发之中的行星探测遥控机械臂,特别是用于火星样品回收飞行任务的机械臂。文中将讨论该机械臂的预定特性,正在研究的关键技术,以及该机械臂设计的主导要求和约束条件,还将讨论早期开发计划所涉及的主要活动,包括机械臂关键部件的样机制造。

关键词：加拿大空间机器人国际空间战灵巧作业机器人行星探测航天飞机遥控机械臂系统 SRMS 活动服务系统 MSS 设计

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简论欧洲创意产业及其当下发展

思想战线 2009年第2期35卷 102-105页

作者： [英]盖尔·邓勒普王文渊(译) 英国邓迪大学邓肯约旦斯通艺术设计学院英国苏格兰邓迪DD14HN 中国传媒大学外国语学院北京100024

当前动荡的国际货币市场使我们不得不重新审视此前关于全球化、市场和创意产业的金融问题等诸多论断。其中,关于创意产业以及其在国际交流中所扮演的角色,相关的研究不应该局限于经济要素,而应扩展到创意产业在社会活动中的"游戏"功能,... 详细信息

当前动荡的国际货币市场使我们不得不重新审视此前关于全球化、市场和创意产业的金融问题等诸多论断。其中,关于创意产业以及其在国际交流中所扮演的角色,相关的研究不应该局限于经济要素,而应扩展到创意产业在社会活动中的"游戏"功能,这一点通过对艺术家、社会组织和公共空间等的案例分析,可以窥得一斑。英国和欧洲其他国家在扶持艺术家以及创意产业发展方面所作的努力,值得关注。

关键词：创意产业需求游戏观念事件性介入者语境

One-to-one conjugate ionospheric response to the dayside reconnections between both hemispheres

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One-to-one conjugate ionospheric response to the dayside rec...

第十四届全国日地空间物理学术研讨会

作者： M.Lockwood M.Lester J.Moen M.W.dunlop I.W.McCrea J. Foster SSTD Rutherford-Appleton Laboratory Chilton Didcot Oxfordshire OX11 0QX UK Department of physics and Astronomy University of Leicester Leicester UK Department of Physics University of Oslo Blindern Oslo Norway MIT Haystack Observatory Westford MA 01886 USA

Magnetic reconnection （MR）, the dominant process responsible for energy and plasma transport into the magnetosphere, effects the Earth’s both polar ionospheres from the same part of the dayside magnetopause has never been shown by observations. We report the first direct evidence of one-to-one conjugate ionospheric response to the dayside MR between both hemispheres, confirming an extending X-line at the dusk flank by EISCAT and SuperDARN radars at two hemispheres. The observations suggest that the magnetic fields （and/or flux tubes）, generated by the dayside reconnections, moved faster to tailward in the summer hemisphere than that in the winter hemisphere.

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Investigation of experimental observables in search of the chiral magnetic effect in heavy-ion collisions in the STAR experiment

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Chinese Physics C 2022年第1期46卷 129-145页

作者： Subikash Choudhury Xin Dong Jim Drachenberg James dunlop ShinIchi Esumi Yicheng Feng Evan Finch Yu Hu Jiangyong Jia Jerome Lauret Wei Li Jinfeng Liao Yufu Lin Mike Lisa Takafumi Niida Robert Lanny Ray Masha Sergeeva Diyu Shen Shuzhe Shi Paul Sorensen Aihong Tang Prithwish Tribedy Gene Van Buren Sergei Voloshin Fuqiang Wang Gang Wang Haojie Xu Zhiwan Xu Nanxi Yao Jie Zhao Fudan University Shanghai200433 Lawrence Berkeley National Laboratory BerkeleyCalifornia 94720 Abilene Christian University AbileneTexas 79699 Brookhaven National Laboratory UptonNew York 11973 University of Tsukuba TsukubaIbaraki 305-8571 Purdue University West LafayetteIndiana 47907 Southern Connecticut State University New HavenConnecticut 06515 State University of New York Stony BrookNew York 11794 Rice University HoustonTexas 77251 Physics Department and Center for Exploration of Energy and Matter Indiana University2401 N Milo B.Sampson LaneBloomingtonIN 47408 College of Physics and Technology Guangxi Normal UniversityGuilin541004 Central China Normal University WuhanHubei 430079 Ohio State University ColumbusOhio 43210 University of Texas AustinTexas 78712 University of California Los AngelesCalifornia 90095 Department of Physics McGill University3600 University StreetMontrealQCH3A 2T8 Wayne State University DetroitMichigan 48201 Huzhou University HuzhouZhejiang 313000

The chiral magnetic effect(CME)is a novel transport phenomenon,arising from the interplay between quantum anomalies and strong magnetic fields in chiral *** high-energy nuclear collisions,the CME may survive the expansion of the quark-gluon plasma fireball and be detected in *** the past two decades,experimental searches for the CME have attracted extensive interest at the Relativistic Heavy Ion Collider(RHIC)and the Large Hadron Collider(LHC).The main goal of this study is to investigate three pertinent experimental approaches:the$\gamma$correlator,the R correlator,and the signed balance *** exploit simple Monte Carlo simulations and a realistic event generator(EBE-AVFD)to verify the equivalence of the core components among these methods and to ascertain their sensitivities to the CME signal and the background contributions for the isobar collisions at the RHIC.

关键词： chiral magnetic effect anisotropic flow heavy-ion collisions quark-gluon plasma