Results 11 to 20 of about 115,125 (183)
Jianzhu Gangjiegou Jinzhan, 2012 简单阐述了高强度钢材的优、缺点以及在国内外建筑工程和桥梁工程中的应用情况,并分析了其实际工程中存在的若干问题。总结了国内外对高强度钢材及其焊缝的脆性断裂与疲劳破坏的相关研究,引出研究高强度建筑用结构钢材及其连接焊缝的断裂韧性和疲劳性能以及影响因素变化规律的必要性,得出了如下结论:低温、焊缝缺陷、钢材厚度的增加和高频动荷载极大降低了高强度钢材的抗脆断能力及疲劳寿命;同时高强度钢材由于特殊冶金工艺而具有的力学性能和韧性加上这些外因限制了其使用范围。
王元清 +4 more
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Zhongshan Daxue xuebao. Yixue kexue ban, 1990 本实验对12例鼻咽癌实体瘤细胞染色体畸变及同一患者外周淋巴细胞的染色体断裂点与已知的脆性部位作了对比分析,在3例中发现有4个肿瘤细胞染色体断裂点,3p24、3p14、5q31和11ql3与其自体脆性部位重合或相邻。而3p24、3P14和5q31属常见脆性部位,11q13既是常见脆性部位,也与叶酸敏感型罕见脆性部位(11q13.3)相邻。3p24位于癌基因ERBA2区域内,且与癌基因RAF1相邻,11q13与癌基因INT2和SEA的位点重合。
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The ethics of infant and early childhood mental health practice
Infant Mental Health Journal: Infancy and Early Childhood, Volume 44, Issue 5, Page 651-662, September 2023., 2023 Abstract Ethics is concerned with the basis for moral judgments of “right” and “wrong” and is central to the clinical endeavor. Many clinicians integrate ethical estimations into their work without much conscious awareness. However, explicit use of ethical principles and frameworks can help navigate clinical decision‐making when there is a sense of ...
Izaak Lim +4 more
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People and Nature, Volume 5, Issue 4, Page 1364-1379, August 2023., 2023 Abstract The social–ecological trap is an emerging concept that describes situations in which self‐reinforcing social and ecological feedbacks maintain or push a social–ecological system towards an undesirable state and threaten the sustainability of human societies.
Zhuangzhuang Wang +5 more
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People and Nature, Volume 4, Issue 6, Page 1461-1474, December 2022., 2022 Abstract Biodiversity in China coexists alongside large ethnically diverse rural human populations within linked ‘biocultural’ social–ecological systems. Cumulative and changing local anthropogenic pressures linked to human population growth and economic development are driving unsustainable resource exploitation, habitat loss and extensive species ...
Heidi Ma +10 more
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Climate change adaptation in Central America: A review of the national policy efforts
Latin American Policy, Volume 13, Issue 2, Page 276-327, November 2022., 2022 Abstract The latest comparative studies of climate policies reinforce the fundamental importance of employing adaptation planning alongside national development strategies. While these studies are necessary to document and share the knowledge of the practices and experiences undertaken at the national level, documents are still scarce on regions of ...
Luis D. Segura +2 more
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Monetary policy and anxious presidents: The effects of monetary shocks on presidential job approval
Politics &Policy, Volume 50, Issue 2, Page 244-273, April 2022., 2022 Abstract Using high‐frequency identification, I show that the Federal Reserve significantly influences its political environment. A 50‐bp exogenous contractionary monetary shock is associated with a decline in the U.S. president's job approval by up to five percentage points in the subsequent 12 to 24 months. This loss exceeds the victory margin in six
Samer Adra
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Conservation Biology, Volume 34, Issue 6, Page 1536-1548, December 2020., 2020 Abstract Present biodiversity comprises the evolutionary heritage of Earth's epochs. Lineages from particular epochs are often found in particular habitats, but whether current habitat decline threatens the heritage from particular epochs is unknown. We hypothesized that within a given region, humans threaten specifically habitats that harbor lineages ...
Igor V. Bartish +6 more
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People and Nature, Volume 8, Issue 2, Page 270-282, February 2026.Abstract Chinese consumer demand for ivory threatens vulnerable African elephant populations, despite long‐standing efforts to combat the illegal wildlife trade. Behavioural science approaches have been proposed to address these systemic behaviours. However, their robust use remains uncommon in demand management interventions.
Molly R. C. Brown +3 more
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Nb‐Si‐based superalloys are considered as the most potential candidate materials for nickel‐based superalloys due to the lower density and higher using temperature. Here, a type of stable Nbss/γNb5Si3 bi‐phases structure with a coherent interface has been successfully designed. Additionally, the Nbss and γNb5Si3 phases showcase the orientation
Xiao‐Wei Wang +6 more
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