This paper expresses some thought on the revision to the 2009 edition of IMO Maritime English Model Course 3.17. It starts with the changes and challenges that have occurred with the amendments of the STCW Convention ...This paper expresses some thought on the revision to the 2009 edition of IMO Maritime English Model Course 3.17. It starts with the changes and challenges that have occurred with the amendments of the STCW Convention at Manila, and goes on with the observations and considerations of the possible principles for the revision. The paper argues that since the requirements and recommendations set in the newly amended convention are more specific, the course should be revised accordingly in correspondence with the specific requirements set and the methodology of the instruction should be adjusted with orientation toward communication competence and specific tasks and duties of the seafarers in English.展开更多
Repeated scatterings of unpolarized photons by non-relativistic electrons in a static and uniform magnetic field are investigated by using the Boltzmann equation with quantum mechanical correction factors for the stim...Repeated scatterings of unpolarized photons by non-relativistic electrons in a static and uniform magnetic field are investigated by using the Boltzmann equation with quantum mechanical correction factors for the stimulated scattering effects.The resulting Kompaneets equation depends explicitly on the electron cyclotron frequency and the incidence angle of the incoming photons relative to the direction of the magnetic field.The evolutionary behavior of the photon spectrum and energy density is highly anisotropic with respect to the static external magnetic field.Possible applications of our results to the X-ray emission from compact and massive stellar objects are discussed in detail and those to the interaction of the microwave background radiation with the hot electrons in galactic clusters are discussed briefly.展开更多
文摘This paper expresses some thought on the revision to the 2009 edition of IMO Maritime English Model Course 3.17. It starts with the changes and challenges that have occurred with the amendments of the STCW Convention at Manila, and goes on with the observations and considerations of the possible principles for the revision. The paper argues that since the requirements and recommendations set in the newly amended convention are more specific, the course should be revised accordingly in correspondence with the specific requirements set and the methodology of the instruction should be adjusted with orientation toward communication competence and specific tasks and duties of the seafarers in English.
基金supported by the National Natural Science Foundation of China (Grant Nos. Y011091001,11003023 and 10833003)
文摘Repeated scatterings of unpolarized photons by non-relativistic electrons in a static and uniform magnetic field are investigated by using the Boltzmann equation with quantum mechanical correction factors for the stimulated scattering effects.The resulting Kompaneets equation depends explicitly on the electron cyclotron frequency and the incidence angle of the incoming photons relative to the direction of the magnetic field.The evolutionary behavior of the photon spectrum and energy density is highly anisotropic with respect to the static external magnetic field.Possible applications of our results to the X-ray emission from compact and massive stellar objects are discussed in detail and those to the interaction of the microwave background radiation with the hot electrons in galactic clusters are discussed briefly.
