For the weak coupling case, two independent unstable modes, one in the ion and the other in the electron diamagnetic direction, are found to coexist. It is predicted that for a given set of plasma parameters, it will be much harder to excite the two modes simultaneously in a plasma with negative shear. The results of this study are significant for tokamak experiments. ICTP Preprint No. The paper discusses the role of basic sciences in the development of technology.
Physics forms the basis for most of the natural and applied sciences and technology.
The state of physics in Africa is reviewed. The need for regional and international cooperation in physics education and research in Africa is stressed.