Economic obstacles

Although parametric pumping appeared on the academic scene in 1966, no commercial installations appear to have been made, at least no widely publicized ones. Periodic heating and cooling of beds of granules or even of periodic compression and decompression of the process gas appear to be serious economic obstacles. 

The first fact is that there are no scientific, technical, or economic obstacles that delay-let alone prevent-the safe handling of all nuclear wastes. A number of completely acceptable methods exist today for the removal of all high-level wastes from the biosphere, essentially forever, and certainly far beyond the time when they will have decayed away to activity levels below the natural uranium from which they came. 

Resolution of the problem of sample preparation is not imminent the scientific aspects of developing a new fixative to replace formalin are challenging and more importantly the logistical and economic obstacles to replacing formalin worldwide are formidable. 

What social and economic obstacles might an individual such as T.F. face in trying to control her body weight ... 

This book is the culmination of Peter Hoffmann s work over the past three decades to chronicle the progress of hydrogen energy from a vision to a niche market to its position today on the brink of full commercialization. He describes the various ways hydrogen can be made, stored, and used, and offers insightful analyses of the remaining technical and economic obstacles to the widespread use of hydrogen. 

By this means, this design helps to overcome most of technical and economical obstacles facing TEGs where used in cathodic protection stations under arctic conditions. They are therejfore an important contribution to effective cathodic protection of natural gas pipelines and hence to the security of gas supply for RAO GAZPROM and its customers. 

I describe the scientific and economic obstacles to more widespread recycling of plastics. 

Because of this, there is a real need for designing the general method, by means of which economical schemes can be created for equations with variable and even discontinuous coefhcients as well as for quasilinear non-stationary equations in complex domains of arbitrary shape and dimension. As a matter of experience, the universal tool in such obstacles is the method of summarized approximation, the framework of which will be explained a little later on the basis of the heat conduction equation in an arbitrary domain G of the dimension p with the boundary F... 

There are many obstacles that bar the way to a wide application of modern pharmacological treatment in the economically disadvantaged countries. They include the scarcity of personnel who could prescribe and supervise the application of such treatment, the omnipresent poverty, the high cost of some medications, the... 

What the talk did not address was whether and how aims b) and c) might be achieved. It is the purpose of this paper to remedy this omission. It will, first, analyse recent developments affecting energy in the political and economic fields. That is to be followed by considering the obstacles to the achievement of greater public support and a discussion whether these can be overcome. Lastly, we draw some conclusions... 

Where does nonproliferation stand in the myriad of institutional, regulatory, public acceptance, economic and, at times, even technical problems now affecting the future of the nuclear option Is the potential contribution of nuclear power activities to further proliferation seen by policy makers and, of equal importance, the public as a significant obstacle to its revival Or is it viewed as a potential benefit capable of reducing proliferation risks. 

A description is given of the initiatives carried out within the European Community for the harmonization of fire testing. The technical and economic reasons are explained for such initiatives, which are taken in order to remove barriers to trade from the European internal market. Of the various fire aspects, only fire reaction testing is taken into consideration here, because it appears as a major technical obstacle to the free circulation of construction materials. All possible approaches are considered for the attainment of such a harmonization and one, the so called interim solution, is fully described. The proposed interim solution, is based on the adoption of three fundamental test methods, i.e. the British "Surface Spread of Flame", the French "Epiradiateur" and the German "Brandschacht", and on the use of a rather complicated "transposition document", which should allow to derive most of the national classifications from the three test package. 

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