Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...

Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria. The bound state solutions of the Dirac equation are only possible for some potentials of physical interest [1-5].

Scientific Notes on Power Electronics: Transistor as an Amplifier In this tutorial, we will show how, under certain conditions, a PNP transistor is equivalent to a single PN junction with a ...

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