This paper presents theoretical and experimental work on development of Tetrahertz (THz) generation and detection schemes. Here, the PC THz generation processes are applied to the formation of transmission line coupled THz electrical waveforms. After a brief explanation of the experimental setup employed, the concept of PC self-switching is introduced through theoretical and experimental work on coplanar gallium arsenide (GaAs) PC self-switching. Here, it is shown that ultrashort THz electrical pulses can be formed on transmission lines through a time delayed multi switching process. The coplanar PC switch was presented to explain the operation of the device. By employing sufficiently short electrode spacings, it was found that the operation of the device could be extended into the THz frequency domain.
Anaerobic digestion systems have been implemented on a number of rural farms all over the world as manure management solutions. Electricity and heating are also provided by means of such systems. In these systems, biomass waste is anaerobically digested to produce biogas, which is then burned in a boiler or an engine generator set to generate heat or power, depending on the system. The size and method of operation of a cattle waste-to-energy conversion system that would yield the highest revenue for a specific number of cattle are calculated in this study. An optimization method for Tabu Search is applied. The best answer is determined after several top-notch ones have been produced. The efficiency of a system for converting cattle waste into energy will help to increase rural electricity in Uganda.
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