On the basis of an American tender for alSO megawatt atomic power plant, the cost factors of nuclear energy are being discussed, i. e.: 1. plant cost including site and site development, cooling water, interest during construction, 2. capital cost including taxes, normal and nuclear insurance, 3. annual efficiency, 4. load factor, 5. interest on fuel inventory, 6. operating costs including repairs, 7. burnup. It is shown, that all cost factors of the tender have been calculated too low and that the guarantees are insufficient. The conclusion to be drawn is that electric energy from alSO...

Research activities are growing quickly, increasingly influence the com position of production and are themselves influenced increasingly by produc er interests. Research tends to serve relatively limited interests, mainly those of the producers of developed countries. As a consequence the use of to-day's research for large parts of the world's population is doubtful. It is recom mended that wider interests be served. Since the development of the develop ing countries constitutes the highest priority for the world at large - in order to attain astabier world -, research should also derive its...

The temporal sequence of combustions occurring in tube-shaped spaces, which are open at one end, with oscillating gas columns reveals a charac teristic dependence on the natural oscillation of the gas column. This de pendence results from the igniting effects of a shock wave which forms at the end of the tube-shaped space during one perliod and moves towards the mixture. Theoretical studies based on the laws of gas dynamics do not clarify the igniting effect. It is, however, clarified when considering the shock from the point of view of gas dynamics and molecular kinetics. Since the ignitions...

In few count ries is research activity administered and supported in such broad measure by the state as it is in France by the Centre National de la Recherche Scientifique (C. N. R. S. ). The lecture provides a comprehensive survey of the development and of the problems which have confronted French research promotion in recent years in the fields of natural science and technology. The chief problem is the necessary compromise between control and liberty of action in modern research structure. Points dealt with are: research at universities, applied research, the proportion of national income...