The increasing development of the use of new energies has led to the widespread use of power electronics, so that electronic power converters play an important role in extracting power from renewable sources. Power electronics can convert raw energy produced from new energy into the desired power with controlled current, voltage and frequency to be used in the power grid. Restructuring of power...

play provides opportunities for exploration, experimentation, and manipulation that are essential for constructing knowledge and contributes to the development of representational thought. during play, children examine and refine their learning in light of the feedback they receive from the environment and other people. it is through play that children develop their imaginations and creativity....

Free radicals play an important role in pathological processes such as aging and developing cancer; hence, natural products inhibit free radical production, and can play an important role in preventing diseases. We aimed to evaluate the scavenging activity of free radicals, reducing power, inhibition of lipid peroxidation and malondialdehyde (MDA) formation, and the antioxidant composition of r...

free radicals play an important role in pathological processes such as aging and developing cancer; hence, natural products inhibit free radical production, and can play an important role in preventing diseases. we aimed to evaluate the scavenging activity of free radicals, reducing power, inhibition of lipid peroxidation and malondialdehyde (mda) formation, and the antioxidant composition of r...

although the history of iran is rife with conquerors and military campaign, but there were not any national and real army at all. in fact, the idea of a single unified army has no precedent in iranian history. ever in the timesthe achaemenid empire, the rulers had felt safer with separate units of armed forces. this mechanism allowed them to play on one group against another so  prevented any c...

Free radicals play an important role in pathological processes such as aging and developing cancer; hence, natural products inhibit free radical production, and can play an important role in preventing diseases. We aimed to evaluate the scavenging activity of free radicals, reducing power, inhibition of lipid peroxidation and malondialdehyde (MDA) formation, and the antioxidant composition of r...

While strategic stability (Kohlberg and Mertens [4]) is mathematically elegant, it is not yet fully understood when or why it is a reasonable condition on a set of equilibria. Cho and Kreps [ 1, p. 2203 conclude “... if there is an intuitive story to go along with the full strength of stability, it is beyond our powers to offer it here.” Elaborate refinements of Nash equilibrium motivated by co...

Compression of optical pulses to ultrashort pulse widths using methods of nonlinear optics is a well-established technology of modern laser science. Extending these methods to pulses with high peak powers, which become available due to the rapid progress of laser technologies, is, however, limited by the universal physical principles. With the ratio P/Pcr of the peak power of an ultrashort lase...

Abstract—As per the statistical data, the Doubly-fed Induction Generator (DFIG) based wind turbine with variable speed and variable pitch control is the most common wind turbine in the growing wind market. This machine is usually used on the grid connected wind energy conversion system to satisfy grid code requirements such as grid stability, Fault Ride Through (FRT), power quality improvement,...