The seismological characteristics of the 15 February 2013 Chelyabinsk bolide explosion are investigated based on seismograms recorded at 50 stations with epicentral distances ranging from 229 to 4324 km. By using 8–2...The seismological characteristics of the 15 February 2013 Chelyabinsk bolide explosion are investigated based on seismograms recorded at 50 stations with epicentral distances ranging from 229 to 4324 km. By using 8–25 s vertical-component Rayleigh waveforms,we obtain a surface-wave magnitude of 4.17±0.31 for this event. According to the relationship among the Rayleigh-wave magnitude,burst height and explosive yield, the explosion yield is estimated to be 686 kt. Using a single-force source to fit the observed Rayleigh waveforms, we obtain a single force of 1.03×10^(12) N, which is equivalent to the impact from the shock wave generated by the bolide explosion.展开更多
In his first speech on February 17 to a joint session of Congress, US President Bill Clinton outlined his wision of smaller deficits through higher income taxes on the wealthy, increased energy taxes and selected spen...In his first speech on February 17 to a joint session of Congress, US President Bill Clinton outlined his wision of smaller deficits through higher income taxes on the wealthy, increased energy taxes and selected spending cuts including a one-year freeze on federal pay. US Secretary of State Warren Christopher arrived in Cairo on February 18 to start his six nation Middle East tour which will also take him to Jordan, Syria, Saudi Arahia, Kuwait, Israel and Lebanon.展开更多
All the data in this catalog are chosen from the ＂Preliminary Seismological Report of Chinese Seismic Stations＂ （Its abbreviation is ＂Monthly Report＂）. The catalog includes the events of M≥4.7 in and near China...All the data in this catalog are chosen from the ＂Preliminary Seismological Report of Chinese Seismic Stations＂ （Its abbreviation is ＂Monthly Report＂）. The catalog includes the events of M≥4.7 in and near China and M≥6 all over the world. The ＂Monthly Report＂ is monthly compiled by the Ninth Section of Institute of Geoohysics, China Earthquake Administration.展开更多
Illustration All the data in this catalog are chosen from the ＂Preliminary Seismological Report of Chinese Seismic Stations＂ （Its abbreviation is ＂Monthly Report＂）. The catalog includes the events of M≥4.7 in ...Illustration All the data in this catalog are chosen from the ＂Preliminary Seismological Report of Chinese Seismic Stations＂ （Its abbreviation is ＂Monthly Report＂）. The catalog includes the events of M≥4.7 in and near China and M≥6 all over the world. The ＂Monthly Report＂ is monthly compiled by the Ninth Section of Institute of Geophysics, China Earthquake Administration.展开更多
Zhao Ziyang, Generai Secretary of the Chinese Communist Party, made a televised speech through satellite on February 2 at the 1988 meeting of the World Economic Forum held in Davos, Switzerland. The Palestinian Libera...Zhao Ziyang, Generai Secretary of the Chinese Communist Party, made a televised speech through satellite on February 2 at the 1988 meeting of the World Economic Forum held in Davos, Switzerland. The Palestinian Liberation Organization on February 2 in Tunis denounced the US veto of a UN Security Council展开更多
The present paper seeks to investigate the extent to which digital activism plays a role in political activism in Morocco through the intersection between women and young activists movement and the social media. By do...The present paper seeks to investigate the extent to which digital activism plays a role in political activism in Morocco through the intersection between women and young activists movement and the social media. By doing so the author argues that while facebook and the Moroccan political arena are Male dominated public areas, young female activists have emerged as prominent leaders in both spaces. The author will more particularly explain why female and youth activists are important in the current state of Moroccan politics. Next, the author provides a discussion of the February 20th Movement, and the movement＇s utilization of Facebook. It will show that young female activists involved in the February 20th Movement have used Facebook in unique and creative ways to further the Movement.展开更多
In February,China’s textile and apparel exports increased to 10.587 billion U.S.dollars (USD) but was significantly down from the peak amount reached in 2007.An increasing volume of shipments went to Europe,with tota...In February,China’s textile and apparel exports increased to 10.587 billion U.S.dollars (USD) but was significantly down from the peak amount reached in 2007.An increasing volume of shipments went to Europe,with total exports to European destinations reaching 3.225 billion USD in February,compared to only 4.105 billion USD to Asia and 1.557 billion to the U.S.,less than half the dollar volume shipped to Europe.The European market has become more attractive due to the lack of appreciation of the yuan against the euro.China is losing market share in the U.S.to Vietnam,Bangladesh and other locations.Exports were weak,but Japan remained the largest market in Asia during the month, taking 1.354 billion USD worth of shipments.Shipments to Hong Kong totaled 740 million,and 499 million USD worth were exported to the ASEAN trade block.展开更多
Honorable President, Distinguished Scholars, Ladies and Gentlemen, I consider it a special privilege to speak at the prestigious Shanghai institutes for international studies(SIIS).This institute has come to signify t...Honorable President, Distinguished Scholars, Ladies and Gentlemen, I consider it a special privilege to speak at the prestigious Shanghai institutes for international studies(SIIS).This institute has come to signify the intellectual vigour of the great Chinese nation.Through its extensive web of institutes and centers of learning,the SIIS encapsulates the rich thought and intellectual traditions of a civilization that spans 5 millenniums.This is indeed a heritage in which you,as scholars,can take justifiable pride.展开更多
基金supported by the National Key Research and Development Program of China (grant 2017YFC0601206)the National Natural Science Foundation of China (grants 41674060 and 41630210)
文摘The seismological characteristics of the 15 February 2013 Chelyabinsk bolide explosion are investigated based on seismograms recorded at 50 stations with epicentral distances ranging from 229 to 4324 km. By using 8–25 s vertical-component Rayleigh waveforms,we obtain a surface-wave magnitude of 4.17±0.31 for this event. According to the relationship among the Rayleigh-wave magnitude,burst height and explosive yield, the explosion yield is estimated to be 686 kt. Using a single-force source to fit the observed Rayleigh waveforms, we obtain a single force of 1.03×10^(12) N, which is equivalent to the impact from the shock wave generated by the bolide explosion.
文摘In his first speech on February 17 to a joint session of Congress, US President Bill Clinton outlined his wision of smaller deficits through higher income taxes on the wealthy, increased energy taxes and selected spending cuts including a one-year freeze on federal pay. US Secretary of State Warren Christopher arrived in Cairo on February 18 to start his six nation Middle East tour which will also take him to Jordan, Syria, Saudi Arahia, Kuwait, Israel and Lebanon.
文摘All the data in this catalog are chosen from the ＂Preliminary Seismological Report of Chinese Seismic Stations＂ （Its abbreviation is ＂Monthly Report＂）. The catalog includes the events of M≥4.7 in and near China and M≥6 all over the world. The ＂Monthly Report＂ is monthly compiled by the Ninth Section of Institute of Geoohysics, China Earthquake Administration.
文摘Illustration All the data in this catalog are chosen from the ＂Preliminary Seismological Report of Chinese Seismic Stations＂ （Its abbreviation is ＂Monthly Report＂）. The catalog includes the events of M≥4.7 in and near China and M≥6 all over the world. The ＂Monthly Report＂ is monthly compiled by the Ninth Section of Institute of Geophysics, China Earthquake Administration.
文摘Zhao Ziyang, Generai Secretary of the Chinese Communist Party, made a televised speech through satellite on February 2 at the 1988 meeting of the World Economic Forum held in Davos, Switzerland. The Palestinian Liberation Organization on February 2 in Tunis denounced the US veto of a UN Security Council
文摘The present paper seeks to investigate the extent to which digital activism plays a role in political activism in Morocco through the intersection between women and young activists movement and the social media. By doing so the author argues that while facebook and the Moroccan political arena are Male dominated public areas, young female activists have emerged as prominent leaders in both spaces. The author will more particularly explain why female and youth activists are important in the current state of Moroccan politics. Next, the author provides a discussion of the February 20th Movement, and the movement＇s utilization of Facebook. It will show that young female activists involved in the February 20th Movement have used Facebook in unique and creative ways to further the Movement.
文摘In February,China’s textile and apparel exports increased to 10.587 billion U.S.dollars (USD) but was significantly down from the peak amount reached in 2007.An increasing volume of shipments went to Europe,with total exports to European destinations reaching 3.225 billion USD in February,compared to only 4.105 billion USD to Asia and 1.557 billion to the U.S.,less than half the dollar volume shipped to Europe.The European market has become more attractive due to the lack of appreciation of the yuan against the euro.China is losing market share in the U.S.to Vietnam,Bangladesh and other locations.Exports were weak,but Japan remained the largest market in Asia during the month, taking 1.354 billion USD worth of shipments.Shipments to Hong Kong totaled 740 million,and 499 million USD worth were exported to the ASEAN trade block.
文摘Honorable President, Distinguished Scholars, Ladies and Gentlemen, I consider it a special privilege to speak at the prestigious Shanghai institutes for international studies(SIIS).This institute has come to signify the intellectual vigour of the great Chinese nation.Through its extensive web of institutes and centers of learning,the SIIS encapsulates the rich thought and intellectual traditions of a civilization that spans 5 millenniums.This is indeed a heritage in which you,as scholars,can take justifiable pride.
