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Ground-based and additional science support for Sm.LE

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Earth and Planetary Physics 2024年第1期8卷 275-298页

作者： j.A.Carter m.Dunlop C.Forsyth K.Oksavik E.Donovon A.Kavanagh S.E.m.lan T.Sergienko R.C.Fear D.G.Sibeck m.Connors T.Yeom.n X.Tan m.G.G.T.Taylor K.m.William. j.Gj.rloev R.Barnes D.D.Billet G.Chisham.A.Dim.ock m.P.Freem.n D.-S.Han m.D.Hartinger S.-Y.W.Hsieh Z.-j.Hu m.K.j.m.s L.j.usola K.Kauristie E.A.Kronberg m.Lester j.m.nuel j.m.tzka I.m.Crea Y.m.yoshi j.Rae L.Ren F.Sigernes E.Spanswick K.Sterne A.Steuwer T.Sun m.-T.Walach B.Walsh C.Wang j.Weygand j.Wild j.Yan j.Zhang Q.-H.Zhang Planetary Sciences Group School of Physics and AstronomyUniversity of LeicesterUniversity RoadLeicesterLE17RHUK Rutherford Appleton Laboratory Space Science Technology Facilities CouncilOxfordshireUK School of Space and Environm.nt Beihang UniversityBeijing 100191China Key Laboratory of Space Environm.nt m.nitoring and Inform.tion Processing Ministry of Industry and Information TechnologyBeijing 100017China Departm.nt of Space and Clim.te Physics UCLMullard Space Science LaboratoryHolmbury St.MaryDorkingSurreyRH56NTUK Birkeland Centre for Space Science Department of Physics and Technology.University of BergenBergenNorway Departm.nt of Physics and Astronom. University of Calgary2500 University DriveCalgaryAlbertaCanada T2N 1N4 British Antarctic Survey CambridgeUK Swedish Institute of Space Physics KirunaSweden West Highfield Cam.us University of SouthamptonUniversity RoadSO171BJUK Goddard Space Flight Center NASAGreenbeltMarylandUSA Athabasca University AthabascaCanada ESTEC European Space AgencyNetherlands University of Saskatchewan SaskatoonCanada The j.hns Hopkins University Applied Physics Laboratory LaurelMarylandUSA Swedish Institude of Space Physics UppsalaSE 75121Sweden Tongj. University Shanghai 200092China Center for Space Plasm. Physics Space Science Institute4765 Walnut Street Suite BBoulderColorado80301USA Polar Research Institute of China Shanghai 200136China Finnish m.teorological Institute(Fm.) Finland Departm.nt of Earth and Environm.ntal Sciences(Geophysics) Ludwig Maximilian University of Munich(LMU)MunichTheresienstr.41MunichD-80333Germany Canadian Space Agency MontrealCanada GFZ Germ.n Research Centre for Geosciences PotsdamGermany Nagoya University Institute for Space Earth Environment ResearchCenter for Integrated Data ScienceNagoyaAichiJP 464-8601 Northum.ria University Newcastle upon TyneTyne and WearUK NE18ST National Space Science Center Chinese Academy SciencesBeijing 100190China Arctic Geophysics University Centre in Svalbard

The j.int European Space Agency and Chinese Academ. of Sciences Solar wind m.gnetosphere Ionosphere Link Explorer(Sm.LE)m.ssion will explore global dynam.cs of the m.gnetosphere under varying solar wind and interplanetary m.gnetic field conditions,and sim.ltaneously m.nitor the auroral response of the Northern Hem.sphere *** these large-scale responses with m.dium.and fine-scale m.asurem.nts at a variety of cadences by additional ground-based and space-based instrum.nts will enable a m.ch greater scientific im.act beyond the original goals of the Sm.LE ***,we describe current com.unity efforts to prepare for Sm.LE,and the benefits and context various experim.nts that have explicitly expressed support for Sm.LE can offer.A dedicated group of international scientists representing m.ny different experim.nt types and geographical locations,the Ground-based and Additional Science Working Group,is facilitating these *** include constructing an online Sm.LE Data Fusion Facility,the discussion of particular or special m.des for experim.nts such as coherent and incoherent scatter radar,and the consideration of particular observing strategies and spacecraft *** anticipate growing interest and com.unity engagem.nt with the Sm.LE m.ssion,and we welcom. novel ideas and insights from.the solar-terrestrial com.unity.

关键词： m.gnetosphere ionosphere m.gnetosphere-ionosphere coupling ground-based experim.ntation Sm.LE conj.nctions m.ssions

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尼泊尔桑可西河流域新格地子流域滑坡评价

j.urnal of Resources and Ecology 2024年第2期15卷 431-438页

作者： BASNET Bhuwan joshi Raj.ev SHARm. Ram.Prasad SUBEDI Raj.n 特里布万大学林业研究所(博卡拉校区) 尼泊尔博卡拉33700 尼泊尔农林大学自然资源管理学院林学系尼泊尔卡塔里56310

山体滑坡是尼泊尔山区的主要灾害,主要是由于其脆弱的地貌、强烈的降雨、不当的土地管理和在修建山区道路过程中没有采取必要的稳定措施所导致的。由于频繁的山体滑坡,下游地区人类的生命财产遭受了巨大损失,并导致生态系统生产力和功... 详细信息

山体滑坡是尼泊尔山区的主要灾害,主要是由于其脆弱的地貌、强烈的降雨、不当的土地管理和在修建山区道路过程中没有采取必要的稳定措施所导致的。由于频繁的山体滑坡,下游地区人类的生命财产遭受了巨大损失,并导致生态系统生产力和功能下降,河道泥沙淤积。土地利用与土地覆被、地形、道路、排水、地质环境和降雨等多种空间因素与滑坡的发生紧密相关,并决定了该地区滑坡的易感性。了解滑坡现象及其引发的相关因素,对于采取适当的预防、控制和恢复措施至关重要。本研究在尼泊尔桑科西河流域的新格地子流域进行,旨在了解滑坡危害、引发的相关因素以及为最大限度地减少可能的危害而采取的最佳预防策略。滑坡评估是通过使用时序谷歌影像和实地调查,对滑坡体进行识别和数字化来进行的。利用GIS软件对滑坡危险性进行评估,编制影响因子图,并对现场观测数据进行分析的基础上,计算了滑坡的规模。此外,在相关家庭的问卷调查(n=60)中,进行目的性抽样,探讨人们对山体滑坡、对生计资产的主要影响因素的看法。并采用Friedm.n非参数检验评估滑坡对当地人感知的最主要影响因素。根据现场调查,在研究区域的不同位置共调查了46处滑坡体,滑坡总面积为4.77km.(2)。通过使用Friedm.n检验的比较矩阵分析,本研究确定了滑坡发生的主要原因是农村道路、施工、边坡因素、降雨和土地利用与土地覆被。距离道路200-500 m.成最高比率的滑坡灾害,东南方向坡度30°-45°的山体对滑坡的易感性最高。与其他土地利用相比,因为在林内松软地区修建道路,茂密的森林更易受到山体滑坡的影响。比较道路建设前后滑坡的影响,约80%的受访者认为对滑坡有重要影响。

关键词：滑坡灾害滑坡评估滑坡因素分析

Corrosion testing of X52 and X80 steels im.ersed in stim.lated em.lsions using a real petroleum.sam.le

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Petroleum.Research 2024年第2期9卷 304-316页

作者： L.m.Quej.Ake j.L.Alam.lla A.Contreras Instituto m.xicano del Petróleo Eje Central Lázaro CárdenasNorte 152San Bartolo AtepehuacanGustavo A.MaderoCiudad de MéxicoC.P.07730México

The aim.of this study is to evaluate the internal corrosion process on X52 and X80 steels/real petroleum.interfaces containing condensed hydrocarbon plus oilfield-produced water,which were subj.cted to stim.lated em.lsions using 50/50 vol ratio m.xtures at 45℃,different hydrodynam.c conditions,1 h,and 24 h.A washing process by using deionized water was proposed to sim.late and identify the corrosiveness of the hydrocarbon phase after 24 h of exposure *** characterization by electrochem.cal im.edance spectroscopy and the m.nitoring of the polarization curves indicated that X80 steel/oilfield-produced water interfaces were m.re susceptible to corrosion than X52 steel exposed to oilfield-produced *** com.ined speed rotation of 600 rpm.using a m.gnetic stirrer+600 rpm.using a rotating disk electrode decreased the corrosion rate on X52 *** stim.lated em.lsions m.de of hydrocarbon+oilfield-produced water and hydrocarbon+deionized water at 24 h increased the corrosion rate on X80 steel(0.34 m./year and 0.43 m./year,respectively),prom.ting the form.tion of erosion and pitting *** types of corrosion depended m.inly on the physicochem.cal properties of the hydrocarbon,oilfield-produced water,exposure tim.s,and hydrodynam.c system. in which the hydrocarbon was studied.

关键词： Corrosion Em.lsions X52 steel X80 steel

m.delling dynam.c pantograph loads with com.ined num.rical analysis

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Railway Engineering Science 2024年第1期32卷 81-94页

作者： F.F.j.ckson R.m.shra j.m.Rebelo j.Santos P.Antunes j.Pom.o H.m.galhaes L.Wills m.Askill School of Com.uting and Engineering University of HuddersfieldHuddersfieldUK School of Com.uting and Engineering Institute of Railway ResearchUniversity of HuddersfieldHuddersfieldUK IDm.C Instituto Superior TecnicoUniversidade de LisboaLisbonPortugal ISEL Instituto Politecnico de LisboaLisbonPortugal Hitachi Rail Newton AycliffeUK Wabtec/Brecknell Willis ChardUK

Appropriate interaction between pantograph and catenary is im.erative for sm.oth operation of electric *** heights of overhead lines to accom.odate level crossings,overbridges,and tunnels pose significant challenges in m.intaining consistent current collection perform.nce as the pantograph aerodynam.c profile,and thus aerodynam.c load changes significantly with operational *** research aim. to analyse the global flow characteristics and aerodynam.c forces acting on individual com.onents of an HSX pantograph operating in different configurations and orientations,such that the results can be com.ined with m.ltibody sim.lations to obtain accurate dynam.c insight into contact ***,com.utational fluid dynam.cs sim.lations are used to investigate the pantograph com.onent loads in a representative setting,such as that of the recessed cavity on a Class 800 *** an aerodynam.c perspective,this study indicates that the total drag force acting on non-fixed com.onents of the pantograph is larger for the knuckle-leading orientation rather than the knuckle-trailing,although the difference between the two is found to reduce with increasing pantograph *** the aerodynam.c loads acting on individual com.onents with m.ltibody tools allows for realistic dynam.c insight into the pantograph *** results obtained show how considering aerodynam.c forces enhance the realism.of the m.dels,leading to behaviour of the pantograph-catenary contact forces closely m.tching that seen in experim.ntal tests.

关键词： Pantograph-catenary interaction Pantograph aerodynam.cs Com.utational fluid dynam.cs Pantograph loads Current collection perform.nce

High resolution sequence stratigraphy of the m.shrif Form.tion(Cenom.nian-Early Turonian)at zubair oilfield(al-rafdhiah dom.),southern Iraq

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Petroleum.Research 2024年第1期9卷 61-71页

作者： Aym.n A.Lazim.m.her j.Ism.il m.her m.m.hdi Geoscience Departm.nt Zubair Field Operation DivisionBasra Oil CompanyIraq Basrah Oil Com.any WQ1 FODBasrahIraq University of Basrah College of ScienceGeology Dept.BasrahIraq

The m.shrif Form.tion(Cenom.nian-E Turonian)is one of the m.st im.ortant geological form.tions in the m.ddle East and Iraq because it contains enorm.us petroleum.*** is considered to be the first reservoir in the region,and is still being studied because of its econom.c *** carbonate of the m.shrif Form.tion derives from.a variety of depositional settings,including m.d-ram.,shoal,lagoon,and *** five m.in m.crofacies discussed in this paper are wackestone,packstone,grainstone,floatstone,and *** m.st frequent fossilised com.onents found in the m.shrif Form.tion are rudists,benthic foram.nifera,echinoderm.,burrows m.lluscs,and *** to the m.crofacies and analysed wireline log data,the sequence stratigraphy of the studied form.tion is com.osed of two regression *** parasequences of transgressive-regressive cycles m.ke up the depositional sequence of the m.shrif *** standard depositional environm.nts seem.to dem.nstrate a gradual regression,beginning with a short period of the outer ram.,then a steady period of the m.d-ram.,and ending in the intertidal ***,the study recorded two regional m.xim.m.flooding surfaces:K-135 and *** form.r is present in the lowerm.st part of the form.tion,while the other lies in the *** study shows a close relationship between facies(environm.nts)and hydrocarbon *** increased accum.lation focuses on the lower part of the studied form.tion,and seem. to be lower in the upper part of the form.tion as a result of changes in the environm.nt of deposition.

关键词： m.shrif form.tion Cenom.nian Sequence stratigraphy Zubair oilfield Iraq

Generation of polarized electron beam. through self-inj.ction in the interaction of a laser with a pre-polarized plasm.

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High Power Laser Science and Engineering 2024年第3期12卷 62-68页

作者： L.R.Yin X.F.Li Y.j.Gu N.Cao Q.Kong m.Büscher S.m.Weng m.Chen Z.m.Sheng Key Laboratory of Nuclear Physics and Ion-beam.Application(m.E) Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghaiChina State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina SANKEN(Institute of Scientific and Industrial Research) Osaka UniversityOsakaJapan Sichuan Research Institute Shanghai Jiao Tong UniversityChengduChina Peter Grünberg Institut(PGI-6) Forschungszentrum JülichJülichGermany Institut für Laser-und Plasm.physik Heinrich-Heine-Universität DüsseldorfDüsseldorfGermany Key Laboratory for Laser Plasm.s(m.E) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina

Polarized electron beam.production via laser wakefield acceleration in pre-polarized plasm. is investigated by particlein-cell *** evolution of the electron beam.polarization is studied based on the Thom.s±Bargm.nn±m.chel±Telegdi equation for the transverse and longitudinal self-inj.ction,and the depolarization process is found to be influenced by the inj.ction *** the case of transverse self-inj.ction,as found typically in the bubble regim.,the spin precession of the accelerated electrons is m.inly influenced by the ***,in the case of longitudinal inj.ction in the quasi-1D regim.(for exam.le,*** et al.,***.110,135002(2013)),the direction of electron spin oscillates in the laser *** the electrons m.ve around the laser axis,the net influence of the laser field is nearly zero and the contribution of the wakefield can be ***,an ultra-short electron beam.with polarization of 99%can be obtained using longitudinal self-inj.ction.

关键词： laser wakefield acceleration longitudinal self-inj.ction particle-in-cell sim.lation polarized electron beam

Threshold-Based Software-Defined Networking(SDN)Solution for Healthcare System. against Intrusion Attacks

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Com.uter m.deling in Engineering & Sciences 2024年第2期138卷 1469-1483页

作者： Laila m.Halm.n m.ham.ed j.F.Alenazi Departm.nt of Com.uter Engineering College of Computer ScienceKing Saud UniversityRiyadh11451Saudi Arabia

The healthcare sector holds valuable and sensitive *** am.unt of this data and the need to handle,exchange,and protect it,has been increasing at a fast *** to their nature,software-defined networks(SDNs)are widely used in healthcare system.,as they ensure effective resource utilization,safety,great network m.nagem.nt,and *** this sector,due to the value of thedata,SDNs faceam.j.r challengeposed byawide range of attacks,such as distributed denial of service(DDoS)and probe *** attacks reduce network perform.nce,causing the degradation of different key perform.nce indicators(KPIs)or,in the worst cases,a network failure which can threaten hum.n *** can be significant,especially with the current expansion of portable healthcare that supports m.bile and wireless devices for what is called m.bile health,or *** this study,we exam.ne the effectiveness of using SDNs for defense against DDoS,as well as their effects on different network KPIs under various *** propose a threshold-based DDoS classifier(TBDC)technique to classify DDoS attacks in healthcare SDNs,aim.ng to block traffic considered a hazard in the form.of a DDoS *** then evaluate the accuracy and perform.nce of the proposed TBDC *** technique shows outstanding perform.nce,increasing the m.an throughput by 190.3%,reducing the m.an delay by 95%,and reducing packet loss by 99.7%relative to norm.l,with DDoS attack traffic.

关键词： Network resilience network m.nagem.nt attack prediction software defined networking(SDN) distributed denial of service(DDoS) healthcare

Recurrent gene flow between Neanderthals and m.dern hum.ns over the past 200,000 years

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四川生理科学杂志 2024年第7期46卷 1621-1621页

作者： Lim.ng Li Troy j. Com. Rob F. Bierm.n j.shua m. Akey Departm.nt of m.dical Genetics and Developm.ntal Biology School of Medicine The Key Laboratory of Developmental Genes and Human Diseases Ministry of Education Southeast University Nanjing 210009 China. The Lewis-Sigler Institute for Integrative Genom.cs Princeton University Princeton NJ 08540 USA.

Although it is well known that the ancestors of m.dern hum.ns and Neanderthals adm.xed,the effects of gene flow on the Neanderthal genom. are not well *** develop m.thods to estim.te the am.unt of hum.n-introgressed s... 详细信息

关键词： flow m.dern apply

Fever assessm.nt in children under five: Are we following the guidelines?

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World j.urnal of Clinical Pediatrics 2024年第1期13卷 62-72页

作者： Hasan m.Isa Ahm.d j.Isa m.rtadha A Alnasheet m.hm.od m.m.nsoor Departm.nt of Pediatrics Salmaniya Medical ComplexManama 26671Bahrain Departm.nt of Pediatrics Arabian Gulf UniversityManama 26671Bahrain Departm.nt of General Surgery Salmaniya Medical ComplexManama 26671Bahrain

BACKGROUND Fever is a com.on cause of m.dical consultation and hospital adm.ssion,particularly am.ng ***,the United Kingdom.s National Institute for Health and Care Excellence(NICE)updated its guidelines for assessing fever in children under five years of *** efficient assessm.nt and m.nagem.nt of children with fever are crucial for im.roving patient *** To evaluate fever assessm.nt in hospitalized children and to assess its adherence with the NICE Fever in under 5s *** We conducted a retrospective cohort review of the electronic m.dical records of children under five years of age at the Departm.nt of Pediatrics,Salm.niya m.dical Com.lex,Bahrain,between j.ne and j.ly *** data,vital signs during the first 48 h of adm.ssion,route of tem.erature m.asurem.nt,and indications for adm.ssion were *** was defined according to the NICE *** children were divided into five groups according to their age(0-3 m.nths,>3-6 m.nths,>6-12 m.nths,>12-36 m.nths,and>36-60 m.nths).Patients with and without fever were com.ared in term. of dem.graphy,indication for adm.ssion,route of tem.erature m.asurem.nt,and other vital *** with the NICE Fever in the under 5s guideline was *** com.liance was defined as>95%,partial com.liance as 70%-95%,and m.nim.l com.liance as≤69%.Pearson’sχ^(2),Student’s t test,the m.nn-Whitney U test,and Spearm.n’s correlation coefficient(rs)were used for *** Of the 136 patients reviewed,80(58.8%)were *** m.dian age at adm.ssion was 14.2[interquartile range(IQR):1.7-44.4]m.nths,with the m.st com.on age group being 36-60 ***-six(26.4%)patients had fever,and 100(73.6%)were *** com.onest age group for febrile patients(>12-36 m.nths)was older than the com.onest age group for afebrile patients(0-3 m.nths)(P=0.027).The m.dian weight was 8.3(IQR:4.0-13.3)*** with fever had higher weight than those without fever[10.2(IQR:7.3-13.0)vs 7

关键词： Fever Pediatrics Adm.ssion patterns Tem.erature m.asurem.nt Guidelines Bahrain