We have measured the phase differences between Xray intensity variations in different energy bands in data taken with Ginga of the Z source GX 5-1 in its normal branch. We apply a χ2 optimal extraction technique to measure the phasedelay spectrum of the normal-branch quasi-periodic oscillations (QPO) and find a jump at 3.5 keV. X-ray intensity variations at the QPO frequency in energy channels ...

Power electronic converters, especially DC/AC Sinusoidal Pulse Width Modulation inverters have been extending their range of use in industry because of their numerous advantages. They typically synthesize the stair –case voltage waveform (from several dc sources) which has reduced harmonic content. This paper describes the development of design, modelling and simulation of the proposed seven le...

This paper presents a new structure to provide the ability for power sharing of two Z-source inverters. According to the operation principles of Z-source inverters, only one input source supplies the circuit, which is a limitation particularly for the stand alone systems feeded by limited output power such as photovoltaics and feul cells. Furthermore; if one source fails to supply,  the lo...

in this paper, we introduce a method by which we can find a close connection between the set of prime $z$-ideals of $c(x)$ and the same of $c(y)$, for some special subset $y$ of $x$. for instance, if $y=coz(f)$ for some $fin c(x)$, then there exists a one-to-one correspondence between the set of prime $z$-ideals of $c(y)$ and the set of prime $z$-ideals of $c(x)$ not containing $f$. moreover, c...

Temperature and Scaling studies from Projectile Fragmentation of Kr+Ni at 35 MeV/A. (August 2009) Sara Katherine Wuenschel, B.S., LeTourneau University Chair of Advisory Committee: Dr. Sherry J. Yennello Many observables have been developed to study the effects of the two component nature of nuclei. This thesis has experimentally probed caloric curves as well as scaling observables for their de...

Wehave analysed all availableX-ray data on the lowmass X-ray binary Cygnus X-2 obtained with the Ginga satellite. A detailed analysis of the spectral and fast timing behaviour of these 4 years of data provides new insights in the behaviour of this Z source. We confirm the previously observed recurrent patterns of behaviour in the X-ray colour-colour and hardnessintensity diagrams consisting of ...

In this paper, we construct time quasi-periodic solutions for the nonlinear lattice Schrödinger equation iq̇n + (qn+1 + qn−1) + tanπ(nα̃+ x)qn + |qn|qn = 0, n ∈ Z, where α̃ satisfies a certain Diophantine condition and x ∈ R/Z. We prove that for sufficiently small, the equation admits a family of small-amplitude time quasi-periodic solutions for “most” of x belonging to R/Z.

Photovoltaic (PV) power systems are increasingly being used as renewable generation sources. Quasi-Z-source inverters (qZSI) a recent, high-potential technology that can be to integrate PV into AC networks. Simultaneously, concerns regarding the stability of increasing. Converters reduce damping grid-connected converter systems, leading instability. Several studies have analyzed and dynamics qZ...