According to topography of Yemen,most areas and villages are located at obligated crest,toe of mountain and under cliffs.Therefore Al-Huwayshah consisting of Tawilah sandstone group is characterized by steep slope rea...According to topography of Yemen,most areas and villages are located at obligated crest,toe of mountain and under cliffs.Therefore Al-Huwayshah consisting of Tawilah sandstone group is characterized by steep slope reach to 90° in some areas.This area is affected by strong tectonic movements and faults that occurred during the geological epochs.This effect enhances to find out fractures and joints as well as the rocks become brittle and ready to slide depending on the position of area.And there are some fractures and joints on the surface of the areas due to tectonic movement associated with opening the Red Sea and Gulf of Aden.The rainfalls,fractures,joints,earthquakes,gravity,vegetations,temperatures and human activities play a big role in the processes of rockfalls and landslides in this area.All those factors are considered as the basic causes and catalyzed factors for occurrence of rockfall in the studide area.In addition,the authors carried out laboratory test for many rock samples to get the physical properties of the rocks.展开更多
BAI Chunli,President of the Chinese Academy of Sciences,will be leading TWAS（the World Academy of Sciences for the advancement of science in developing countries）for another two years from2016 to 2018.as was announc...BAI Chunli,President of the Chinese Academy of Sciences,will be leading TWAS（the World Academy of Sciences for the advancement of science in developing countries）for another two years from2016 to 2018.as was announced by the 26thTWAS general meeting in Vienna,Austria in November 2015.Addressing the meeting’s opening on November 18.BAI pointed out that 30 years after the first TWAS general meeting was convened to promote research capacity in developing nations,展开更多
AUSTRIA International Atomic Energy Agency＇s（IAEA）Director General Yukiya Amano（center）attends a board of governors meeting at the headquarters of IAEA in Vienna on January 19,discussing the work of inspecting an...AUSTRIA International Atomic Energy Agency＇s（IAEA）Director General Yukiya Amano（center）attends a board of governors meeting at the headquarters of IAEA in Vienna on January 19,discussing the work of inspecting and supervising Iran＇s nuclear activityPAKISTAN Police investigate a suicide blast site at a checkpoint in Peshawar on January 19.展开更多
文摘According to topography of Yemen,most areas and villages are located at obligated crest,toe of mountain and under cliffs.Therefore Al-Huwayshah consisting of Tawilah sandstone group is characterized by steep slope reach to 90° in some areas.This area is affected by strong tectonic movements and faults that occurred during the geological epochs.This effect enhances to find out fractures and joints as well as the rocks become brittle and ready to slide depending on the position of area.And there are some fractures and joints on the surface of the areas due to tectonic movement associated with opening the Red Sea and Gulf of Aden.The rainfalls,fractures,joints,earthquakes,gravity,vegetations,temperatures and human activities play a big role in the processes of rockfalls and landslides in this area.All those factors are considered as the basic causes and catalyzed factors for occurrence of rockfall in the studide area.In addition,the authors carried out laboratory test for many rock samples to get the physical properties of the rocks.
文摘BAI Chunli,President of the Chinese Academy of Sciences,will be leading TWAS（the World Academy of Sciences for the advancement of science in developing countries）for another two years from2016 to 2018.as was announced by the 26thTWAS general meeting in Vienna,Austria in November 2015.Addressing the meeting’s opening on November 18.BAI pointed out that 30 years after the first TWAS general meeting was convened to promote research capacity in developing nations,
文摘AUSTRIA International Atomic Energy Agency＇s（IAEA）Director General Yukiya Amano（center）attends a board of governors meeting at the headquarters of IAEA in Vienna on January 19,discussing the work of inspecting and supervising Iran＇s nuclear activityPAKISTAN Police investigate a suicide blast site at a checkpoint in Peshawar on January 19.
