The above paper [1] is about the two-way split-step parabolic equation method (2W-SSPE) over irregular terrain, and claims that they have developed the “improved” version of the 2W-SSPE approach that ...

This paper presents a current steering variable gain amplifier (VGA) in SiGe BiCMOS with a gain control circuit and a current mirror with negative feedback to avoid thermal runaway. The gain control ...

For monoids that satisfy a weak cancellation condition, it is shown that the decidability of the existential theory of word equations is preserved under graph products. Furthermore, it is shown that ...