Results 31 to 40 of about 799 (135)
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
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Finding floral and faunal species richness optima among active fire regimes
Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Changing fire regimes have important implications for biodiversity and challenge traditional conservation approaches that rely on historical conditions as proxies for ecological integrity. This historical‐centric approach becomes increasingly tenuous under climate change, necessitating direct tests of environmental impacts on biodiversity.
Zachary L. Steel +8 more
wiley +1 more source
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
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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, 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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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
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
Jianzhu Gangjiegou Jinzhan, 2013 以翼缘板加强式和盖板加强式两类加强型节点为研究对象,采用ANSYS结构分析软件"生死单元"功能模拟了瞬态焊接过程,得到焊接残余应力场的分布,在此基础上,针对有、无考虑焊接残余应力的两种有限元模型,分析了残余应力对节点和荷载-位移滞回性能及脆性断裂特性等影响。研究结果表明,焊接残余应力对盖板加强型节点的脆性断裂影响大于翼缘板加强型节点,盖板加强式节点在梁端对接焊缝的边缘容易发生脆性断裂,在设计和施工时应予以注意并采取相应的防范措施。
刘芸, 王燕, 王薇
doaj
Gaoya dianqi, 2013 笔者分析了一起500 kV复合绝缘子脆断事故以及老化机理。该复合绝缘子脆断事故的特征与常见的脆断故障不同,在硅橡胶护套表面出现了部分贯通蚀孔,解剖后可以发现部分区域脱粘且在护套与芯棒交界面有漏电蚀痕。观察到故障复合绝缘子的宏观与微观交界面均存在一定的质量问题。使用傅氏变换红外光谱分析芯棒材料,证明在芯棒材料中存在玻璃化侵蚀,离子交换以及水解等老化过程。最后结合试验结果,分析了此类由于水份侵入而造成的老化现象,并建议在线监测中需关注复合绝缘子交界面质量。
冉学彬 +5 more
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