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Relationship between treatment types and blood–brain barrier disruption in patients with acute ischemic stroke:Two case reports
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作者 Youngbeom Seo jonghoon kim +2 位作者 Min Cheol Chang Hyungkyu Huh Eun-Hee Lee 《World Journal of Clinical Cases》 SCIE 2022年第7期2351-2356,共6页
BACKGROUND Blood-brain barrier(BBB)disruption plays an important role in the development of neurological dysfunction in ischemic stroke.However,diagnostic modalities that can clearly diagnose the degree of BBB disrupt... BACKGROUND Blood-brain barrier(BBB)disruption plays an important role in the development of neurological dysfunction in ischemic stroke.However,diagnostic modalities that can clearly diagnose the degree of BBB disruption in ischemic stroke are limited.Here,we describe two cases in which the usefulness of dynamic contrastenhanced magnetic resonance imaging(DCE-MRI)in detecting BBB disruption was evaluated after treatment of acute ischemic stroke using two different methods.CASE SUMMARY The two patients of similar age and relatively similar cerebral infarction locations were treated conservatively or with thrombectomy,although their sex was different.As a result of analysis by performing DCE-MRI,it was confirmed that BBB disruption was significantly less severe in the patient who underwent thrombectomy(P=3.3×10^(-7)),whereas the average Ktrans of the contralateral hemisphere in both patients was similar(2.4×10^(-5)min^(-1) and 2.0×10^(-5)min^(-1)).If reperfusion is achieved through thrombectomy,it may indicate that the penumbra can be saved and BBB recovery can be promoted.CONCLUSION Our cases suggest that BBB disruption could be important if BBB permeability is used to guide clinical treatment. 展开更多
关键词 Blood-brain barrier Ischemic stroke Dynamic contrast-enhanced magnetic resonance imaging THROMBECTOMY PENUMBRA Case report
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亚利桑那州尤马市供水管线替换开挖与HDD比较
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作者 Samuel T. Ariaratnam jonghoon kim +1 位作者 Noel Guercio 彭博 《非开挖技术》 2017年第4期11-15,共5页
2016年,亚利桑那州尤马市更换了市中心附近约5,800L.F.老化和尺寸不足的石棉水泥供水管线,以减少维修次数并改善供水条件。旧管线铺设于1938年和1940年之间。采用直径为6in的PVC管替换现有的6段2~6in石棉水泥管线。为了更好地了... 2016年,亚利桑那州尤马市更换了市中心附近约5,800L.F.老化和尺寸不足的石棉水泥供水管线,以减少维修次数并改善供水条件。旧管线铺设于1938年和1940年之间。采用直径为6in的PVC管替换现有的6段2~6in石棉水泥管线。为了更好地了解传统开挖施工与水平定向钻进(HDD)施工的优缺点,该市将该项目分为约2000L.F.的HDD施工和3,800L.F.的开挖施工。在同一个项目中采用这两种工法可以更好地对比两者的优缺点。采用开挖方法铺设PVCC900DR18,同时采用HDD铺设可熔PVC(FPVC)DR18。收集2个月的数据,分析的因素包括对环境的影响,对交通的影响和的两种施工方法之间比较,结果发现,与传统开挖法相比,HDD在所有三个方面都具有先天优势.eCalcTM程序用于确定每一工法在项目实施期间的气体排放量。 展开更多
关键词 开挖施工 HDD施工 管线替换
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异形塑料污水管道改进爆管技术的发展
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作者 jonghoon kim Dan D. Koo +1 位作者 Samuel T. Ariaratnam 京缘 《非开挖技术》 2017年第2期91-94,共4页
在韩国已越来越多地采用聚氯乙烯(PVC)或高密度聚乙烯(HDPE)制成公共厕所和暴雨排水管。然而,一些塑料管材的性能,如高弹性(柔韧性)和低的承载能力很容易使塑料管变形。与实心墙塑料管相比,异形墙结构增加了承载能力和刚度,... 在韩国已越来越多地采用聚氯乙烯(PVC)或高密度聚乙烯(HDPE)制成公共厕所和暴雨排水管。然而,一些塑料管材的性能,如高弹性(柔韧性)和低的承载能力很容易使塑料管变形。与实心墙塑料管相比,异形墙结构增加了承载能力和刚度,使塑料管在等效加栽条件下可以更具成本效益。异形墙结构有不同的墙体结构,如单波纹,双壁,三壁结构。近年来,异形壁管的检查显示,许多异形墙塑料管经历了结构性的失败,特别是在冠面由于前所未有的负载条件,如垂直载荷,地下水,和地面沉降。异形墙污水管道系统的过早失效导致了韩国的下水道机构的大量负担。本文提出了一种改变传统的爆管技术去回收几何变形的异型壁塑料管和安装新的管道的非开挖技术概念的发展。所提出的新的技术概念用于尽量减少在这个过程中对环境和社会破坏的影响,与传统的开放式切割更换方法相比,预计这将是一个经济的替代方法。 展开更多
关键词 非开挖 爆管 异性管道
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Key technologies for electric vehicles 被引量:1
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作者 Rui Xiong jonghoon kim +8 位作者 Weixiang Shen Chen Lv Hailong Li Xiaoyong Zhu Wanzhong Zhao Bingzhao Gao Hongyan Guo Chengming Zhang Fengchun Sun 《Green Energy and Intelligent Transportation》 2022年第2期135-137,共3页
1.Introduction Electric vehicles(EVs)are playing an increasingly important role in decarbonizing the transportation sector.They constitute a promising solution to a set of global challenges such as climate change and ... 1.Introduction Electric vehicles(EVs)are playing an increasingly important role in decarbonizing the transportation sector.They constitute a promising solution to a set of global challenges such as climate change and air pollution.EVs are an integration of a wide spectrum of techniques,such as battery monitoring,battery safety and vehicle energy management.In this regard,the EV development still faces significant challenges,which necessitate innovations in EV technologies.Given this,Green Energy and Intelligent Transportation(GEITS)organizes a special issue of“Key Technologies for Electric Vehicles”that attempts to advance knowledge in the area of EVs and provides a platform for researchers and engineers to share recent research results and discuss critical challenges in this field.A wide spectrum of topics are discussed,including but not limited to the following. 展开更多
关键词 BATTERY KEY CHALLENGES
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