In order to delay the laminar-turbulent transition in a boundary layer flow, the cancellation of 2D- and 3D instability waves by artificially excited counter-disturbances is under investigation. The instability waves are subject to the spatio-temporal dispersion characteristics of the boundary layer. In order to generate the appropriate counter-dis...
Germany
Germany
Das Heft beinhaltet eine Zusammenstellung von Beitraegen aus den Fachbereichen der Luftreinhaltung, des Laerm- und Erschuetterungsschutzes sowie des Naturschutzes und der Landschaftspflege. Es soll der Fachwelt Hinweise und Anregungen geben, um Verkehrswege zweckmaessig und kostenguenstig zu planen sowie Eingriffe in die Natur und Landschaft und ve...
Noise abatement in mine ventilation systems is investigated. The low-frequency blower components are to be removed, and a modal acoustic field is to be influenced by active noise abatement measures. The investigations show that good results can be achieved without additional internals or duct segments. / Die vorliegende Arbeit beschaeftigt sich mit...
This thesis presents newly developed X-ray methods which can be used to characterize in detail the state of distortion of the crystal lattice in semiconductor wafers, devices and nanostructures. The methods use the extraordinary properties of the X-rays available from modern synchrotron sources such as the ESRF (Grenoble). In the first part of the ...
Germany
Germany
Available from TIB Hannover: RR 5243(2000,4) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische Informationsbibliothek / SIGLE / DE / Germany
The author presents a model for predicting slope motion in fully or partly flooded abandoned lignite mines in the Lausitz region. The model is the first complex model which provides a correct description of the processes involved. Good results were obtained although lateral pressure was slightly overestimated especially if water levels were low / G...
