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The sinc function is well known in people and have many interesting properties. These mathematical properties are well known in electrical engineers & physicists and used in many domains like signal processing.Since C.Stormer introduced his paper about those in 1885, many properties on sinc has been studied, generalized and results of these studies are introduced in preferences.This book is written to organize and explain the things of these properties which are studied much than others. In chapter 1, we introduce the fundamental knowledge which you need in order to understand chapter 2 and...

The macroscopic equations of quantum hydrodynamical (QHD) type are used to simulate the motion of charge transport in ultra submicron semiconductor devices, where quantum effects, depending on particle resonant tunnelling through potential barriers and charge density built-up in quantum wells, take place. Therefore, QHD models are important and dominative in the description of the motion of electrons or holes transport under the self-consistent electric field. For last two decades, there have been many mathematical studies about the QHD model for semiconductors in different settings. However,...