Knowing Moho discontinuity undulation is fundamental to understanding mechanisms of lithosphereasthenosphere interaction, extensional tectonism and crustal deformation in volcanic passive margins such as the study are...Knowing Moho discontinuity undulation is fundamental to understanding mechanisms of lithosphereasthenosphere interaction, extensional tectonism and crustal deformation in volcanic passive margins such as the study area, which is located in the southwestern corner of the Arabian Peninsula bounded by the Red Sea and the Gulf of Aden. In this work, a 3D Moho depth model of the study area is constructed for the first time by inverting gravity data from the Earth Gravitational Model(EGM2008) using the ParkerOldenburg algorithm. This model indicates the shallow zone is situated at depths of 20 km to 24 km beneath coastal plains, whereas the deep zone is located below the plateau at depths of 30 km to 35 km and its deepest part coincides mainly with the Dhamar-Rada ’a Quaternary volcanic field. The results also indicate two channels of hot magmatic materials joining both the Sana’a-Amran Quaternary volcanic field and the Late Miocene Jabal An Nar volcanic area with the Dhamar-Rada’a volcanic field. This conclusion is supported by the widespread geothermal activity(of mantle origin) distributed along these channels,isotopic data, and the upper mantle low velocity zones indicated by earlier studies.展开更多
The conflict in Yemen,which has been going on for 8 years,has great repercussions for Yemen and the entire region.Yemen’s strategic position has made it a key player in a crucial area that influences energy supplies,...The conflict in Yemen,which has been going on for 8 years,has great repercussions for Yemen and the entire region.Yemen’s strategic position has made it a key player in a crucial area that influences energy supplies,and international shipping routes,as well as a point of contact between Asia,Africa,and Europe.China,the area’s greatest economic partner and largest importer of oil,was one of those affected,particularly with the announcement of the Chinese BRI and its massive projects in the region.The pro-longed conflict in Yemen has hampered Chinese investments and the construction of several key and strategic BRI projects in Yemen,as well as jeopardising many of its mega projects in the region.It also posed a new threat to the Red Sea and the Gulf of Aden’s sea routes,as well as the establishment of new military bases in strategic areas capable of controlling international trade routes and intensifying military rivalry in the region.展开更多
Familial adenomatous polyposis(FAP)or Gardner’s syndrome is often accompanied by adenomas of the stomach and duodenum.We experienced a case of adenomas of the common bile duct in a 40-year-old woman with FAP presenti...Familial adenomatous polyposis(FAP)or Gardner’s syndrome is often accompanied by adenomas of the stomach and duodenum.We experienced a case of adenomas of the common bile duct in a 40-year-old woman with FAP presenting with acute cholangitis.Only 8 cases of adenomas or adenocarcinoma ofthe common bile duct have been reported in the literature in patients with FAP or Gardner’s syndrome.Those patients presented with acute cholangitis or pancreatitis.Local excision or Whipple procedure may be the reasonable surgical option.展开更多
Analysis of high-resolution 4 km sea surface temperature, Chlorophyll a （Chl a）, and wind datasets provides a detailed description of the spatio-temporal seasonal succession of phytoplankton biomass in the Red Sea a...Analysis of high-resolution 4 km sea surface temperature, Chlorophyll a （Chl a）, and wind datasets provides a detailed description of the spatio-temporal seasonal succession of phytoplankton biomass in the Red Sea and Gulf of Aden. Based on Moderate Resolution Imaging Spectroradiometer on-board aqua platform （MO- DIS Aqua） data andsynoptic observations in the Red Sea, Chl a varies from north to south, with the northern part appearing to be oligotrophic. This is likely due to the absence of strong mixing and low nutrient intru- sion in comparison to the southern part during winter. In the Gulf of Aden, the emergence of upwelling cell is clearly evident along the coast of Yemen, and is only distinct from the summer-autumn seasons. Most notable is the pulsating nature of the upwelling, with warm and cold events clearly distinguished with phytoplankton response to this physical forcing also evident. The phytoplankton biomass distribution varies considerably between the two regions of study. In both study areas, water temperature and prevailing winds control nutrient concentrations.展开更多
To assess the impact of the armed conflict of 2015-2016 on the availability of medicines and health service in Aden Governorate whilst the rebels over-run the city. A cross sectional survey was done during the period,...To assess the impact of the armed conflict of 2015-2016 on the availability of medicines and health service in Aden Governorate whilst the rebels over-run the city. A cross sectional survey was done during the period, September-November 2016. The survey included 63 medicinal preparations as marker medicines in 142 public health facilities including private pharmacies. Direct questions and a retrospective study of the United Nations and other organizations that were working in area reporting were studied. I.V. fluids had the highest availability in the market whilst vaccines had the lowest average availability at 60%. Medicine prices were increased by 71%. The function of health facilities was almost on the verge of collapse. The four districts containing the main hospital and the medical stores were inaccessible and completely controlled by the rebels. Two out of six hospitals remain functional. Dengue and malaria rampantly spread and approximately 65,250 civilians were affected. The situation was further aggravated by the absence of basic services such as electricity, water and food.展开更多
文摘Knowing Moho discontinuity undulation is fundamental to understanding mechanisms of lithosphereasthenosphere interaction, extensional tectonism and crustal deformation in volcanic passive margins such as the study area, which is located in the southwestern corner of the Arabian Peninsula bounded by the Red Sea and the Gulf of Aden. In this work, a 3D Moho depth model of the study area is constructed for the first time by inverting gravity data from the Earth Gravitational Model(EGM2008) using the ParkerOldenburg algorithm. This model indicates the shallow zone is situated at depths of 20 km to 24 km beneath coastal plains, whereas the deep zone is located below the plateau at depths of 30 km to 35 km and its deepest part coincides mainly with the Dhamar-Rada ’a Quaternary volcanic field. The results also indicate two channels of hot magmatic materials joining both the Sana’a-Amran Quaternary volcanic field and the Late Miocene Jabal An Nar volcanic area with the Dhamar-Rada’a volcanic field. This conclusion is supported by the widespread geothermal activity(of mantle origin) distributed along these channels,isotopic data, and the upper mantle low velocity zones indicated by earlier studies.
文摘The conflict in Yemen,which has been going on for 8 years,has great repercussions for Yemen and the entire region.Yemen’s strategic position has made it a key player in a crucial area that influences energy supplies,and international shipping routes,as well as a point of contact between Asia,Africa,and Europe.China,the area’s greatest economic partner and largest importer of oil,was one of those affected,particularly with the announcement of the Chinese BRI and its massive projects in the region.The pro-longed conflict in Yemen has hampered Chinese investments and the construction of several key and strategic BRI projects in Yemen,as well as jeopardising many of its mega projects in the region.It also posed a new threat to the Red Sea and the Gulf of Aden’s sea routes,as well as the establishment of new military bases in strategic areas capable of controlling international trade routes and intensifying military rivalry in the region.
文摘Familial adenomatous polyposis(FAP)or Gardner’s syndrome is often accompanied by adenomas of the stomach and duodenum.We experienced a case of adenomas of the common bile duct in a 40-year-old woman with FAP presenting with acute cholangitis.Only 8 cases of adenomas or adenocarcinoma ofthe common bile duct have been reported in the literature in patients with FAP or Gardner’s syndrome.Those patients presented with acute cholangitis or pancreatitis.Local excision or Whipple procedure may be the reasonable surgical option.
文摘Analysis of high-resolution 4 km sea surface temperature, Chlorophyll a （Chl a）, and wind datasets provides a detailed description of the spatio-temporal seasonal succession of phytoplankton biomass in the Red Sea and Gulf of Aden. Based on Moderate Resolution Imaging Spectroradiometer on-board aqua platform （MO- DIS Aqua） data andsynoptic observations in the Red Sea, Chl a varies from north to south, with the northern part appearing to be oligotrophic. This is likely due to the absence of strong mixing and low nutrient intru- sion in comparison to the southern part during winter. In the Gulf of Aden, the emergence of upwelling cell is clearly evident along the coast of Yemen, and is only distinct from the summer-autumn seasons. Most notable is the pulsating nature of the upwelling, with warm and cold events clearly distinguished with phytoplankton response to this physical forcing also evident. The phytoplankton biomass distribution varies considerably between the two regions of study. In both study areas, water temperature and prevailing winds control nutrient concentrations.
文摘To assess the impact of the armed conflict of 2015-2016 on the availability of medicines and health service in Aden Governorate whilst the rebels over-run the city. A cross sectional survey was done during the period, September-November 2016. The survey included 63 medicinal preparations as marker medicines in 142 public health facilities including private pharmacies. Direct questions and a retrospective study of the United Nations and other organizations that were working in area reporting were studied. I.V. fluids had the highest availability in the market whilst vaccines had the lowest average availability at 60%. Medicine prices were increased by 71%. The function of health facilities was almost on the verge of collapse. The four districts containing the main hospital and the medical stores were inaccessible and completely controlled by the rebels. Two out of six hospitals remain functional. Dengue and malaria rampantly spread and approximately 65,250 civilians were affected. The situation was further aggravated by the absence of basic services such as electricity, water and food.
