Since the Cenozoic,especially the Quaternary,tectonic movement has been strengthening in northwestern Yunnan,China.The tectonic elevation rate of mountains changed from 0.3～ 1.7 mm/a(before the Holocene)to 2～ 7.1 mm...Since the Cenozoic,especially the Quaternary,tectonic movement has been strengthening in northwestern Yunnan,China.The tectonic elevation rate of mountains changed from 0.3～ 1.7 mm/a(before the Holocene)to 2～ 7.1 mm/a(after the Holocene).The subsiding velocity of the Holocene basins increases by 1～ 2 orders of magnitude relative to the Pleistocene.The displacement rate of the Quaternary fractures increases continuously.Modern crustal stress values become high.Tectonic deformation speeds up.Seismic activities strengthen.Geothermal flux anomaly is pronounced.The strengthening tectonic activities will result in changes of the topographic frame of northwestern Yunnan,worsen mountain geologic disaster,speed up the contraction of lakes and decrease the regional stability.Therefore,human beings will face the challenge of a more rigorous environment.展开更多
This paper examines the far-reaching influence of anti-dam movement on the protection of environment in the second half of the 20th century in American West. It first introduces the historical background of dams built...This paper examines the far-reaching influence of anti-dam movement on the protection of environment in the second half of the 20th century in American West. It first introduces the historical background of dams built along the Colorado River-the most important river in the West, especially the construction of Hoover Dam and Glen Canyon Dam. Then, the criticism of dams on the Colorado is examined with the emphasis on the anti-dam movement resulting from the awareness of the negative ecological impacts on the Colorado. In the conclusion, the author demonstrates the unparallel historical significance of the anti-dam movement in the environmentalism in developing the American West.展开更多
Objective: This study aimed to determine the effect of fetal movements on the MCA pulsatility index (PI) and quantify the fall of MCA PI after initiation of fetal movements and/or breathing, and the time taken to reco...Objective: This study aimed to determine the effect of fetal movements on the MCA pulsatility index (PI) and quantify the fall of MCA PI after initiation of fetal movements and/or breathing, and the time taken to recover from a fall below the 5th percentile. Methods: 16 women with appropriate for gestational age (AGA) fetuses and 16 women with small for gestational age (SGA) fetuses were recruited. MCA PI during “no movement” state was compared with MCA PI values during fetal body movements and breathing movements. Results: MCA PI measurements with body or breathing movements were significantly (p 0.005) lower as compared to that observed without movements. MCA PI started rising immediately after cessation of body movements and/or breathing movements. Conclusions: MCA PI with fetal body or breathing movements is significantly lower as compared to that observed in the quiet state. If MCA PI measurement is below 5th centile, it should be measured again up to 90 seconds after cessation of fetal body and/or breathing movements in order to minimize false positive diagnosis of cerebral sparing effect in SGA as well as AGA fetuses.展开更多
在煤矿技术致因事故率逐年下降、人因事故率却高居不下的背景下,煤矿安全标识作为安全信息的重要载体,如何影响矿工的安全认知和决策过程成为信息时代重要的研究内容。为探索安全标识有效性影响机理,降低煤矿安全事故发生概率,结合框架...在煤矿技术致因事故率逐年下降、人因事故率却高居不下的背景下,煤矿安全标识作为安全信息的重要载体,如何影响矿工的安全认知和决策过程成为信息时代重要的研究内容。为探索安全标识有效性影响机理,降低煤矿安全事故发生概率,结合框架效应,借助ErgoLAB Experiment平台和Tobii Pro Nano眼动仪收集了30名被试的试验数据,研究在不同作业情境(高风险或低风险)下,不同损益框架的煤矿安全标识对矿工再认记忆任务和眼动行为的影响。结果表明:高风险作业情境及使用损失框架展示的安全标识能显著提高被试的再认记忆正确率;在低风险作业情境的安全标识设计中,可以突出潜在风险和损失,以吸引矿工有限的安全注意力。研究结果可为安全标识优化设计提供证据和参考,有助于提高煤矿的安全生产水平。展开更多
基金The study is finicially supported by the Natural Science Foundation of Yunnan Province,China(No.97D031M).
文摘Since the Cenozoic,especially the Quaternary,tectonic movement has been strengthening in northwestern Yunnan,China.The tectonic elevation rate of mountains changed from 0.3～ 1.7 mm/a(before the Holocene)to 2～ 7.1 mm/a(after the Holocene).The subsiding velocity of the Holocene basins increases by 1～ 2 orders of magnitude relative to the Pleistocene.The displacement rate of the Quaternary fractures increases continuously.Modern crustal stress values become high.Tectonic deformation speeds up.Seismic activities strengthen.Geothermal flux anomaly is pronounced.The strengthening tectonic activities will result in changes of the topographic frame of northwestern Yunnan,worsen mountain geologic disaster,speed up the contraction of lakes and decrease the regional stability.Therefore,human beings will face the challenge of a more rigorous environment.
文摘This paper examines the far-reaching influence of anti-dam movement on the protection of environment in the second half of the 20th century in American West. It first introduces the historical background of dams built along the Colorado River-the most important river in the West, especially the construction of Hoover Dam and Glen Canyon Dam. Then, the criticism of dams on the Colorado is examined with the emphasis on the anti-dam movement resulting from the awareness of the negative ecological impacts on the Colorado. In the conclusion, the author demonstrates the unparallel historical significance of the anti-dam movement in the environmentalism in developing the American West.
文摘Objective: This study aimed to determine the effect of fetal movements on the MCA pulsatility index (PI) and quantify the fall of MCA PI after initiation of fetal movements and/or breathing, and the time taken to recover from a fall below the 5th percentile. Methods: 16 women with appropriate for gestational age (AGA) fetuses and 16 women with small for gestational age (SGA) fetuses were recruited. MCA PI during “no movement” state was compared with MCA PI values during fetal body movements and breathing movements. Results: MCA PI measurements with body or breathing movements were significantly (p 0.005) lower as compared to that observed without movements. MCA PI started rising immediately after cessation of body movements and/or breathing movements. Conclusions: MCA PI with fetal body or breathing movements is significantly lower as compared to that observed in the quiet state. If MCA PI measurement is below 5th centile, it should be measured again up to 90 seconds after cessation of fetal body and/or breathing movements in order to minimize false positive diagnosis of cerebral sparing effect in SGA as well as AGA fetuses.
文摘在煤矿技术致因事故率逐年下降、人因事故率却高居不下的背景下,煤矿安全标识作为安全信息的重要载体,如何影响矿工的安全认知和决策过程成为信息时代重要的研究内容。为探索安全标识有效性影响机理,降低煤矿安全事故发生概率,结合框架效应,借助ErgoLAB Experiment平台和Tobii Pro Nano眼动仪收集了30名被试的试验数据,研究在不同作业情境(高风险或低风险)下,不同损益框架的煤矿安全标识对矿工再认记忆任务和眼动行为的影响。结果表明:高风险作业情境及使用损失框架展示的安全标识能显著提高被试的再认记忆正确率;在低风险作业情境的安全标识设计中,可以突出潜在风险和损失,以吸引矿工有限的安全注意力。研究结果可为安全标识优化设计提供证据和参考,有助于提高煤矿的安全生产水平。
