Processes for the generation of peak electric power in the range of 25 MW to 100 MW, based on fuel cells and heat engines using hydrogen as fuel, are compared for their feasibility and economics. Fuel cells examined include low and high temperature system...
National Technical Information Service (NTIS)
The report on experimental results which were obtained above all within the heavy gas dispersion phase of the clouds. This phase extends up to a distance from the source distance in which the initial heavy gas concentration has decreased to about 1% by vo...
The penetration model deals with the projectile as a cylinder dammed up with penetration, the target material being defined in the form of a resistance acting at the projectile head. Projectile deformation and braking is described on the basis of a one-di...
A model of the collision probability based on the shock processes of the gas diffusion is given. The special orbit mechanics of objects in the earth gravitational field is thereby disregarded. The debris distribution is examined. The maximal object flux a...
The report is the summary of an estimation of mass and composition of non-methane volatile organic compounds (NMVOC) in Austria. For 1987 emissions of 517,000 tons per year (t/yr) were calculated, which compares to an emission density of 6.12 grams per sq...
The report contains an estimation of mass and composition of non-methane volatile organic compounds (NMVOC) in Austria. For 1987 emissions of 517,000 tons per year (t/yr) were calculated, which compares to an emission density of 6.12 grams per square mete...
A dynamic compartment model is presented here which serves to determine the activity distribution in the coastal waters of Northwest Europe. The media considered are water, suspended matter, particulates of biological origin and sediment. The model is val...
Since the mid-1980's, heavy metal characterisation was carried out on sediments of selected sections of the river Saale and methodical work was done on the analysis of flowing water at the Friedrich Schiller University at Jena. However, there was no compr...
Carcinomas occurring in the thyroid gland as a result of radiation generally affect the papillary and, to a slightly lesser extent, follicular parts of this organ, while the available body of evidence hardly gives any indications of anaplastic and medulla...
The computing method presented makes it possible to determine rapidly and simply the aerodynamic characteristics of non-axisymmetrical hypersonic projectiles. The method is based on Newton's well-known theory, which reduces spatial flow analysis to the co...
The programme system PARK is mainly based on the radioecological food chain model ECOSYS. PARK is subdivided into the system parts AUTOPARK and DIAPARK, and into the programme DOSISPARK. AUTOPARK is a mainly automatically running programme system which co...
The report concludes the Commissions' studies over one and a half election periods. Five accounts of different subjects and one institutionalization report have not only revealed the benefits the Bundestag may derive from technology assessment but have al...
Volatile halogenated organic compounds contribute much to stratospheric ozone destruction and to the global warming effect. Both phenomena are symptoms of an irreversible destruction of the earth's atmosphere. The yearly use of these substances in Austria...
In the First Technical Report the fundamental ideas for the realization of this project are presented and the future possible maximum gross employment effects of an expansion of renewable energy systems in North-Rhine-Westphalia with consideration of the ...
The recommendations are applicable to the determination of surface contaminations of the skin and to the estimation of the expected radiation exposure of the skin of contaminated persons. According to the present recommendations, the radiation exposure ca...
The development and the application of an atmospheric correction method for remotely sensed images of land surfaces with high spatial resolution are presented. An approximate solution of radiative transfer including non Lambertian reflection from the grou...
During the first months following the fallout we have measured the activities of J-131 in some human thyroids. To study the long-term variation of radiocesium with time, we have observed the activity level of Cs-134 and Cs-137 in human muscle tissues over...
In order to estimate the relevance of Austrian heavy metals emissions, the total emissions for selected heavy metals (As, Cd, Cr, Cu, Hg, Ni, Pb, Se, Zn) were assesed, especially with respect to their long-range transport. Base year for the inventory was ...
The ongoing climate change causes an increasing frequency of weather extremes (Leckebusch et al., 2008), which can result in wide area damage events (drought, windthrows/breaks) within boreal forest ecosystem. The damage effects, however, depend not only on the strength of a driving force itself (e.g. wind speed) but also on combinations of effecting agents and forest structure. Thus, the present ...
NASA Astrophysics Data System (ADS)
Language: German ...
NBII National Biological Information Infrastructure
