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In this paper a new wave splitting is suggested that simplifies the analysis of wave propagation in reciprocal bi-isotropic media. Two different methods to solve the scattering problem are analyzed; the invariant imbedding and the Green function approach. The medium is modeled by constitutive relations in the time domain (time convolutions) and the slab is assumed to be inhomogeneous with respect
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Imaging velocity measurements along a line through a flowing gas are described. Laser-induced fluorescence from I 2 molecules, used to seed the flow, was utilized. A method of alternating counter-propagating beams from a single-mode dye laser, acting in the wing of the Doppler-shifted molecular absorption profile was used. Some improvements to the technique are also suggested.
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Based on information produced by a 200 kHz ultrasonic echo device developed for robotics and other industrial purposes, a method for object identification was developed and is presented in this paper. Interpretation of the echos from the reflecting objects, complexity analysis and information extraction were made by system identification methods such as impulse response analysis and state-space re
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This thesis investigates how regulatory instruments, and specifically requirements rules, targeting energy use in existing residential buildings could be made part of the forceful intervention that is required to reduce the use of energy in existing residential buildings. Two approaches to the design of requirement rules are analyzed: a detail-steering approach and a target-oriented approach. The