in this paper, a new cascaded multilevel inverter by capability of increasing the number of output voltage levels with reduced number of power switches is proposed. the proposed topology consists of series connection of a number of proposed basic multilevel units. in order to generate all voltage levels at the output, five different algorithms are proposed to determine the magnitude of dc volta...

In this overview we examine the basic principles of properties of electroencephalogram and magnetoencephalogram and the corresponding models of sources and of the volume conductor. In particular we show how the dipolar model is anchored in neurophysiological findings and how the different conductivities of the brain and the tissue surrounding it can be estimated. Using these basic models as too...

Abstract – This paper gives a brief overview of production facilities from renewable energy sources which especially influence the power system with variable production. The paper describes some basic ways of connection and technical data relevant for the design of production plants, as well as the most important influences on the power system, especially with respect to the following: voltage,...

nowadays, with population growth in urban areas, providing safe water and health is considered basic needs of human, alongside the various pollutants due to urban activities, agriculture and industrial areas on adjacent ranges into urban water resources around the environment is such that study necessary to prevent the pollution of water resources and identification of pollution sources shows. ...

To date active research on laser-driven plasma-based accelerators have achieved great progress on production of high-energy, high-quality electron and photon beams in a compact scale. Such laser plasma accelerators have been envisaged bringing a wide range of applications in basic, medical and industrial sciences. Here inheriting the groundbreaker's review article on "Laser Acceleration and its...

Document preparation has been an increasingly important application of computers for over twenty-five years. When first developed, document preparation systems were only one of many applications supported on a computing system (and, indeed, an application that system administrators often tried to suppress rather than support). In the modern computing environment, it is common to find computers ...

The AKARI/IRC Point Source Catalogue Version 1.0 provides positions and fluxes of 870,973 sources (844,649 sources in 9μm band and 194,551 sources in 18μm band) in the Mid-Infrared wavelengths. This document describes the outline of the data processing and calibration, and basic performance of the released catalogue. The users of the catalogue are requested to read this document carefully befor...

24.1.1 Coherent, Free-Electron Radiation Sources The primary objective of the group is to develop a basic experimental and theoretical understanding of coherent generation by free electrons for wavelengths in the 1 Ym to 10 cm range. Particular emphasis is placed on free electron lasers, Cerenkov sources, relativistic magnetrons, and other novel radiation sources. The experiments are carried ou...

nowadays energy is one of the most essential needs of human being and it can be considered as the basic prerequisite of social and economic development.  hence, many of the correlations and legislations of a country are affected by it. since iran has huge source of gas and oil, it has turned to a fossil fuel oriented county. but as oil and gas sources are non-renewable ones and cannot be replac...

A brief introduction to electron and ion sources for particle accelerators is given. Concentrating on the basic processes for the production of these particles, thermionic and photocathode production of electrons and the processes in Penning and electron cyclotron resonance ion sources are covered. Finally, negative ions are discussed.