Showing papers by "Leibniz University of Hanover published in 1979"
TL;DR: In this paper, the interaction of CO 2 and CO with ZnO (1010) was studied by means of changes in the electrical conductivity ÎÏ and surface potential ÎÏ s, thermal desorption, AES, EELS and LEED.
68Â citations
TL;DR: In this paper, it was shown that coherence between nondegenerate sublevels of an atomic ground state is efficiently induced by means of a short resonant light pulse, which can sensitively be detected by a polarization technique.
49Â citations
39Â citations
TL;DR: In this paper, a review of recent theoretical and experimental results on one-dimensional magnetism as realised in solids is reviewed with a particular emphasis on dynamic properties, including short wavelength quasi spin-waves in classical chains.
26Â citations
TL;DR: In this article, the possibilites de different melanges de frigorigenes and leurs compositions en vue de leur utilisation dans des installations avec pompe de chaleur are discussed.
Abstract: Resume Des frigorigenes non azeotropes ont ete, autrefois, frequemment proposes pour utilisation dans le materiel frigorifique. En effet, ils offrent des proprietes favorables en ce qui concerne l'economie d'energie, la regulation de puissance et la maitrise des ecarts importants de temperature. Mais ils n'ont toutefois pas pu s'imposer jusqu'a present dans le domaine industriel, car ces caracteristiques ne sont pas determinantes de la production de froid par l'intermediaire de circuits frigorifiques a compression. On montre, que precisement dans le cas d'utilisation de la pompe de chaleur, des melanges de fluides frigorigenes non azeotropes peuvent offrir dans cet ordre d'idee des avantages importants. On considere en particulier les possibilites de differents melanges de frigorigenes et leurs compositions en vue de leur utilisation dans des installations avec pompe de chaleur. En ce qui concerne l'application de tels melanges de genes frigorigenes, les premiers resultats de mesure sont exposes et discutes.
24Â citations
TL;DR: In this article, it has been discovered by both wind-tunnel tests and theoretical analysis that the aeroelastic instability with typical nonlinear aerodynamic behaviour was responsible for the failure of these structures.
10Â citations
3Â citations
01 Jan 1979
TL;DR: In this paper, the authors developed relations between nutrient loading and the parameters affecting it, regarding one catchment area at a time respectively, based on measurements of concentrations, rainfall and runoff.
Abstract: Based on measurements of concentrations, rainfall and runoff the relations between nutrient loading and the parameters affecting it are developed, regarding one catchment area at a time respectively. The total weight of mass is found by using a coaxial relation, that connects amount and duration of rainfall, time of year, and the elapsed time since the last storm as parameters for the average concentration of the storm runoff. For determining the time distribution of the nutrient loading within the storm runoff the Characteristic Pollutiongraph (CPG) is introduced. The validity of the found relations is shown by comparing computed and measured results.
3Â citations
2Â citations
12 Mar 1979
TL;DR: In this article, the design of a receiver for a closed-cycle gas turbine with air as the working medium is discussed, and the emphasis of the investigations is layed upon the optimization of heat transfer.
Abstract: The design of a receiver for a closed-cycle gas turbine with air as the working medium is discussed. The emphasis of the investigations is layed upon the optimization of heat transfer to the working medium. The irradiation pattern along the tubes and the effects of the working-medium pressure, the pressure loss and the tube cage geometry are considered.Copyright © 1979 by ASME
1Â citations