Climate change impacts on water resources are expected to be significant in Yemen. Efforts have been made to understand the expected changes and develop mitigation possibilities for the expected scenarios for a future...Climate change impacts on water resources are expected to be significant in Yemen. Efforts have been made to understand the expected changes and develop mitigation possibilities for the expected scenarios for a future sustainable use of resources and mitigation of expected impacts. The paper describes the development of a detailed baseline database and the assessment of climate change and variability impacts on water resources over the 2030, 2050 and 2080 time horizon on a Yemen-wide scale. Based on downscaled Global Climate Model data, a range of scenarios were established, representing potential Mean, Warm ＆ Wet and Hot ＆ Dry conditions as derived by evaluating worst case scenarios from the ensemble of the global models for the specified years. The results of the model include an estimated runoff coefficient, monthly rainfall, runoff, infiltration and evaporation representing the water balance in the different catchments. Analysis of the different evaluated scenarios shows that in the Mid, Warm and Wet scenario the hydrological components are generally higher than in the baseline scenario. For the Hot ＆ Dry scenario, runoff, infiltration and evapotranspiration are decreasing due to the decreasing precipitation and increase in temperature. The relative changes in runoff are strongest.展开更多
The development and application of the ''digital mine'' concept in China depends heavily upon the use of remote sensing data as well as domestic expertise and awareness. Illegal mining of mineral resou...The development and application of the ''digital mine'' concept in China depends heavily upon the use of remote sensing data as well as domestic expertise and awareness. Illegal mining of mineral resources has been a serious long term problem frustrating the Xishimen Iron Ore Mine management. This mine is located in Wu'an county in Hebei province, China. Illegal activities have led to enormous economic losses by interfering with the normal operation of the Xishimen mine and have ruined the surrounding environ- ment and the stability of the Mahe riverbed the crosses the mined area. This paper is based on field recon- naissance taken over many years around the mine area. The ground survey data are integrated with Differential Synthetic Aperture Radar Interferometry (D-InSAR) results from ALOS/PALSAR data to pin- point mining locations. By investigating the relationship between the resulting interferometric deforma- tion pattern and the mining schedule, which is known a priori, areas affected by illegal mining activities are identified. To some extent these areas indicate the location of the illegal site. The results clearly dem- onstrate D-InSAR's ability to cost-effectively monitor illegal mining activities.展开更多
Background and aims:Hepatic encephalopathy is a common complication encountered in patients with liver cirrhosis.Hepatic encephalopathy is not reflected in the current liver transplant allocation system.Correlation wa...Background and aims:Hepatic encephalopathy is a common complication encountered in patients with liver cirrhosis.Hepatic encephalopathy is not reflected in the current liver transplant allocation system.Correlation was sought between hepatic encephalopathy with findings detected on radiographic imaging studies and the patient’s clinical profile.Methods:A retrospective analysis was conducted of patients with cirrhosis,who presented for liver transplant evaluation in 2009 and 2010.Patients with hepatocellular carcinoma,ejection fraction less than 60%and who had a TIPS(transjugular intrahepatic portosystemic shunting)procedure or who did not complete the evaluation were excluded.Statistical analysis was performed and variables found to be significant on univariate analysis(P<0.05)were analysed by a multivariate logistic regression model.Results:A total of 117 patients met the inclusion criteria and were divided into a hepatic encephalopathy group(n=58)and a control group(n=59).Univariate analysis found that a smaller portal vein diameter,smaller liver antero-posterior diameter,liver nodularity and use of diuretics or centrally acting medications showed significant correlation with hepatic encephalopathy.This association was confirmed for smaller portal vein,use of diuretics and centrally acting medications in the multivariate analysis.Conclusion:A decrease in portal vein diameter was associated with increased risk of encephalopathy.Identifying patients with smaller portal vein diameter may warrant screening for encephalopathy by more advanced psychometric testing,and more aggressive control of constipation and other factors that may precipitate encephalopathy.展开更多
文摘Climate change impacts on water resources are expected to be significant in Yemen. Efforts have been made to understand the expected changes and develop mitigation possibilities for the expected scenarios for a future sustainable use of resources and mitigation of expected impacts. The paper describes the development of a detailed baseline database and the assessment of climate change and variability impacts on water resources over the 2030, 2050 and 2080 time horizon on a Yemen-wide scale. Based on downscaled Global Climate Model data, a range of scenarios were established, representing potential Mean, Warm ＆ Wet and Hot ＆ Dry conditions as derived by evaluating worst case scenarios from the ensemble of the global models for the specified years. The results of the model include an estimated runoff coefficient, monthly rainfall, runoff, infiltration and evaporation representing the water balance in the different catchments. Analysis of the different evaluated scenarios shows that in the Mid, Warm and Wet scenario the hydrological components are generally higher than in the baseline scenario. For the Hot ＆ Dry scenario, runoff, infiltration and evapotranspiration are decreasing due to the decreasing precipitation and increase in temperature. The relative changes in runoff are strongest.
基金supported by the National Hi-Tech Research and Development Program of China (No. 2009AA11Z105)the sponsors of Hanxing Iron Ore Mine Administration Bureau for providing the research funds,insitu test assistance and monitor work
文摘The development and application of the ''digital mine'' concept in China depends heavily upon the use of remote sensing data as well as domestic expertise and awareness. Illegal mining of mineral resources has been a serious long term problem frustrating the Xishimen Iron Ore Mine management. This mine is located in Wu'an county in Hebei province, China. Illegal activities have led to enormous economic losses by interfering with the normal operation of the Xishimen mine and have ruined the surrounding environ- ment and the stability of the Mahe riverbed the crosses the mined area. This paper is based on field recon- naissance taken over many years around the mine area. The ground survey data are integrated with Differential Synthetic Aperture Radar Interferometry (D-InSAR) results from ALOS/PALSAR data to pin- point mining locations. By investigating the relationship between the resulting interferometric deforma- tion pattern and the mining schedule, which is known a priori, areas affected by illegal mining activities are identified. To some extent these areas indicate the location of the illegal site. The results clearly dem- onstrate D-InSAR's ability to cost-effectively monitor illegal mining activities.
文摘Background and aims:Hepatic encephalopathy is a common complication encountered in patients with liver cirrhosis.Hepatic encephalopathy is not reflected in the current liver transplant allocation system.Correlation was sought between hepatic encephalopathy with findings detected on radiographic imaging studies and the patient’s clinical profile.Methods:A retrospective analysis was conducted of patients with cirrhosis,who presented for liver transplant evaluation in 2009 and 2010.Patients with hepatocellular carcinoma,ejection fraction less than 60%and who had a TIPS(transjugular intrahepatic portosystemic shunting)procedure or who did not complete the evaluation were excluded.Statistical analysis was performed and variables found to be significant on univariate analysis(P<0.05)were analysed by a multivariate logistic regression model.Results:A total of 117 patients met the inclusion criteria and were divided into a hepatic encephalopathy group(n=58)and a control group(n=59).Univariate analysis found that a smaller portal vein diameter,smaller liver antero-posterior diameter,liver nodularity and use of diuretics or centrally acting medications showed significant correlation with hepatic encephalopathy.This association was confirmed for smaller portal vein,use of diuretics and centrally acting medications in the multivariate analysis.Conclusion:A decrease in portal vein diameter was associated with increased risk of encephalopathy.Identifying patients with smaller portal vein diameter may warrant screening for encephalopathy by more advanced psychometric testing,and more aggressive control of constipation and other factors that may precipitate encephalopathy.
