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Precision ultrasonic measurements in binary gas systems provide continuous real-time monitoring of mixture composition and flow. Using custom microcontroller-based electronics, we have developed an ultrasonic instrument, with numerous potential applications, capable of making continuous high-precision sound velocity measurements. The instrument measures sound transit times along two opposite directions...
Control over CF3+/CHBr2+ in laser driven fragmentation of CHBr2COCF3, is observed. Pump-probe spectroscopy reveals a charge transfer mechanism. This mechanism may allow for a measurement of the wave function for a dissociating polyatomic molecule.
The solution of many l1 problems requires Smith decompositions of l1 matrices. In this note, we describe a class of problems, including many practical problems, for which this is not true. We also show generally how to pose and obtain approximate solutions to l1 problems without Smith decomposition.
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