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Scattering not only broadens the width of the optical transition between two levels but can enable optical gain and absorption to coexist — a fact that is unambiguously demonstrated by the observation of 'Bloch gain' in a quantum cascade laser.
Heat release in the end-gas prior to autoignition was investigated using different experimental methods including transducers for heat flux and pressure as well as rotational coherent anti-Stokes-Raman spectroscopy, which is a laser-based method for non-intrusive instantaneous thermometry of the gas. The time history was examined in the cases of mixtures of various stoichio-metries, where some wer
The high time resolution of ultra-wideband (UWB) signals results in a large number of multipath components (MPCs) arriving at the receiver, which presents a source of diversity. In addition to this multipath diversity, there is also repetition diversity inherent in impulse radio (IR) UWB systems, since a number of pulses are transmitted for each information symbol. In order to make optimal use of
In this work, we report an original experimental approach for measuring the two-dimensional distribution of the droplets Sauter Mean Diameter (SMD) using the SLIPI-LIF/Mie technique. A hollow-cone spray is formed by continuously injecting water mixed with a non-toxic fluorescing dye at 20 bars injection pressure. The spray is illuminated using a continuous wave laser. The illumination wavelength (
Popular Abstract in Swedish Idén om att företag försöker koordinera sina handlingar för att försöka förhindra rivalitet mellan dem har en lång historia inom nationalekonomin och den har undersökts relativt grundligt. Trots detta är många frågor fortfarande obesvarade och den här avhandlingen ämnar försöka besvara några av dessa. Avhandlingen kan delas in i två relaterade delar. För det första, ävChapter 2 investigates an infinitely repeated Bertrand duopoly where firms with different discount factors bargain over which collusive price and market share to implement. The bargaining is modelled as a strategic game and the main results of the paper is that it shows existence of a unique subgame perfect equilibrium and that the least patient firm's equilibrium market share is not monotone in i
