Modal logics are good candidates for a formal theory of agents. The efficiency of reasoning method in modal logics is very important, because it determines whet
With many advantages, hydrogen is considered as the fuel of the future. But there is no natural resource of hydrogen and it must be produced by other kinds of e
The aim of this study is to investigate the biological effects of ion beams on pollen.Pollen grains of Cedrus deodara were implanted with 30 keV nitrogen ion be