THE PEACEFUL LIBERATION OF TIBET IS A SPLENDID CHAPTER IN THE UNIFICATION OF THE CHINESE NATION——An Interview with Mr.Zhu Weiqun,the Vice Minister of the United Front Work Department of the Central Government of China

<正>On the occasion to celebrate the signing of the"Seventeen Articles Agreement"and the 60th anniversary of the peaceful liberation of Tibet,at the request of t...     

Comments on a paper entitled “sudden neutral sodium layers: A strong link to sporadic e layers” by U. Von Zahn and T. L. Hansen

Observations of thin, enhanced, layers within the atmospheric sodium layer have recently been interpreted in the literature as resulting from the liberation of sodium from dust particles by the effect of auroral particle precipitation. In this note we point out that one of the assumptions on which the argument for this mechanism is based is incorrect, and that direct deposition of meteoric material is more likely to be the cause of the observed enhancements.