Results 31 to 40 of about 1,318 (187)
Policy Effectiveness in Managing Drug Shortages: Evidence From South Korea (2015–2024)
World Medical &Health Policy, Volume 17, Issue 3, Page 561-572, September 2025.ABSTRACT Drug shortages represent a growing policy challenge for healthcare systems worldwide. This study investigates actual drug shortage events in South Korea from 2015 to 2024, using a “Shortage Occurred vs. Shortage Non‐Occurred” framework to distinguish real‐world disruptions from administrative classifications.
Seung‐Rae Yu
wiley +1 more source
Dianci bileiqi, 2010 介绍了一起复合绝缘子脆断的发生过程,通过解剖和相关电气、机械性能试验,以及脆断面形成机理等方面分析了脆断原因,发现芯棒脆断的原因是运行环境的恶劣加之结构的缺陷使得端部密封不良,造成酸蚀并最终导致芯棒机械性能下降而发生脆断。为防止脆断事故的发生,从加强检验、连接方式、材料工艺、存储安装等方面提出了相应的对策,保证电网的安全可靠运行。
郭清滔, 廖福旺, 黄海鲲
doaj
Zhejiang Daxue xuebao. Lixue ban, 2022 通过检索古籍文献，整理了明代（公元1368—1644年）长江流域人口大量死亡事件（mass death events，MDE）10 a尺度的频次与县次序列，利用自然断点分级法、空间分析法等分析了MDE的时空特征及发生原因。结果表明：276 a间，长江流域有158 a发生MDE，明代后期发生频次和影响规模最大；季节上，表现为夏季多发（44.3%），春、秋季次之；空间上，集中分布于长江中下游、尤其是长江三角洲地区，且呈从各省交界处向各省中心扩散的趋势。“未记录原因的饥荒”和“旱灾+其他灾害-饥荒 ...
WUZiyu(毋子玉) +3 more
doaj +1 more source
, 1994 对渤海老二号平台１９６８年被大冰推倒这一重大事故进行了全面的调查和分析;描述了平台破坏的全过程。指出平台倒塌是由３个方面的综合因素导致的;而破坏的本质原因是冰激振动产生的疲劳损伤发展到一定程度后;疲劳裂纹的低温脆性扩展而使桩腿失去了承载能力。为此;总结出海冰环境中设计平台的７点经验;供从事我国辽东湾平台的设计、制造 ...
方华灿, 段梦兰, 陈如恒
core
氧化石墨烯改性不同表面性质的碳纤维/环氧树脂的微观形貌与动态热力学性能 [PDF]
, 2019 通过模压成型，用氧化石墨烯（GO）对四种碳纤维（CF）（CCF300、T700、CCF800、CCM40J）织物增强环氧树脂（EP）复合材料进行改性，通过材料的微观形貌、动态热力学性能等研究了GO对这四种不同表面性质的CF/EP复合材料的改性效果。研究表明，添加GO后，GO-EP对四种CF的浸润性均比EP明显提高，纤维与GO/EP间的界面黏接比与EP基体间的黏接明显改善；CF/EP复合材料的破坏主要发生在CF与EP的界面，而GO的存在使GO-CF/EP复合材料的破坏由CF与EP基体的界面向GO ...
代少伟 +7 more
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Social protection and resilience in protracted crises
International Social Security Review, Volume 78, Issue 2-3, Page 173-190, April-September 2025.Abstract This article critically examines perspectives on social protection’s role in strengthening resilience capacities in protracted crises – contexts where conflict and displacement persist for five years or longer. These crises shape how stakeholders navigate their mandates to provide support, while influencing how affected communities seek to ...
Carolina Holland‐Szyp, Jeremy Lind
wiley +1 more source
Screening of β-thalassemia trait among pregnant women with NESTROFT
Thalassemia Reports, 2015 The morbidity of β-thalassemia major has forced medical professionals to formulate screening tests to effectively screen β-thalassemia trait (BTT) of which naked eye single tube osmotic fragility test (NESTROFT) is the most cost effective test.
Hitesh Sarda +2 more
doaj +1 more source
The Neo‐Mercantilist Nexus: China's Geoeconomics Strategy in the Middle East—Discourse and Practice
Digest of Middle East Studies, Volume 34, Issue 2, Spring 2025.ABSTRACT China's Belt and Road Initiative (BRI) has become a cornerstone of its hybrid neo‐mercantilist geoeconomics strategy, reshaping the Middle East's geopolitical and economic landscape. This research explores how the BRI enables China to secure energy resources, expand trade networks, and establish strategic infrastructure, thereby advancing its ...
Riya Sultana, Ronen A. Cohen
wiley +1 more source
Dianci bileiqi, 2018 为了深入揭示复合绝缘子脆断机理并提出预防措施,分析了一起500 kV复合绝缘子脆断事故,采集故障绝缘子与正常绝缘子样本进行对比试验。对样本绝缘子进行外观检查、解剖测试、拉力和耐应力腐蚀测试、憎水性测试等试验,并对试验结果进行实验室条件下的分析。结果表明:故障复合绝缘子存在3层较为明显的光滑断面,且断面处芯棒与硅橡胶护套交界面处存在硅橡胶粉化层;6只试验绝缘子只有2只通过耐应力腐蚀试验;试验绝缘子憎水性等级在HC4～HC5之间;元素分析发现脆断绝缘子芯棒中硼元素含量较高,结合测试结果可知芯棒为非耐酸芯棒 ...
卢明 +5 more
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Dianci bileiqi, 2022 针对氧化锌非线性电阻片制造过程中隐性开裂的问题，采用金相显微镜等方法，对开裂断面的显微结构形貌、受力方式进行分析验证，探究了塑性开裂和脆性开裂两种隐性开裂的机理以及隐性开裂发生的时段。结果表明，氧化锌非线性电阻片发生隐性开裂的主要形式是在排结合剂之后发生的脆性开裂，这种开裂方式是在受力磕碰后，早期表现为非常隐蔽的微裂纹，后经高温烧结裂纹进一步扩展，最后受磨片剪切应力后开裂显现的一种失效模式。
张文刚 +5 more
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