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A definition of meaning is given for languages that possess a parsing algorithm. This definition leads to consider a class of mappings called syntax directed mappings. The behavior of contextfree languages is studied in relation to the defined class of mappings and it is shown that the translation can be implemented in two passes: first by a nondeterministic push down automaton and then by a two-way...
Beam loading plays an important part in the determination of the power gain and efficiency of klystrons; hence it is desirable to have an accurate theoretical knowledge of this phenomenon. The usual beam loading analysis considers only the loading effects of a d-c beam of primary electrons on a resonator. It can be shown that these electrons effectively change the shunt impedance of the resonator...
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