Two generic configurations of forced commutated PWM converters, i.e. voltage source inverters and current source inverters, have been proposed as advanced reactive power compensators'. A new configuration to combine the features of the two generic ones is proposed, designed and analyzed in this paper. It is composed of a PWM current source inverter handling high power with very low switching fr...

Abstract—This paper presents bifurcation and chaos in a PWM currentmode H-bridge inverter. This inverter exhibits various interesting bifurcation phenomena. First, we briefly explain the behavior of a PWM currentmode H-bridge inverter from viewpoints of the switched dynamical system. In order to analyze the circuit dynamics we derive a return map exactly. Using this map, the stability of the pe...

Due to great value of the time constant of the integrator circuit, a hardware defined PWM (Pulse Width Modulation) signal makes it possible to build a Digital to Analog Converter (DAC) characterized by a relatively long response time. An attempt at creating the software defined PWM signal leads to increased response time of the DAC converter with a coefficient several hundred times longer than ...

Surface immunoglobulin D (IgD)-positive lymphocytes precoated with monoclonal anti-delta antibody were selectively removed from blood mononuclear cell preparations by "panning" and by fluorescence-activated cell sorter. The depletion of sIgD+ cells did not significantly affect plasma cell responses to pokeweed mitogen PWM). PWM-responsive B cells lacking sIgD and mouse erythrocyte receptors pre...

MOTIVATION To improve the detection of nucleotide sequence signals (e.g. promoter elements) by position-weight matrices (PWM) using the concept of statistically significant matches. RESULTS The Mksite program was originally developed for analyzing protein sequences. We report NMksite, a new version adapted to the processing of nucleotide sequences. NMksite creates PWM from nucleotide sequence...

This study was aimed to examine the role of iron in causing periventricular white matter (PWM) damage following a hypoxic injury in the developing brain. Along with iron, the expression of iron regulatory proteins (IRPs) and transferrin receptor (TfR), which are involved in iron acquisition, was also examined in the PWM by subjecting 1-d-old Wistar rats to hypoxia. Apart from an increase in iro...

This study aimed to show the difference of epilepsy from another chronic neurological disorder with episodic manifestations (CDEM): migraine. Seventy persons with epilepsy (PWE), 56 persons with migraine (PWM) and 45 healthy control participants (HCs) were included. The groups were compared in terms of demographics, quality of life, depression and self-esteem. The PWE and PWM were also compared...

The need for high power apparatus in industry has increased in recent years. Multilevel inverters have developed as easy alternatives for such power requirements. Multilevel inverters consist of a group of semiconductor switches and a set of voltage source components like capacitors or independent sources. The basic concept of these inverters depends on using this series of switches and sources...

It is well-known that rectifiers are used widely in many applications required AC/DC transformation. With technological advances, many studies are performed for AC/DC converters and many control methods are proposed in order to improve the performance of these rectifiers in recent years. Pulse width modulation (PWM) based rectifiers are one of the most popular rectifier types. PWM rectifiers ha...

The role of recombinant B cell stimulatory factor 2 (BSF-2/IL-6) in the regulation of growth and differentiation of B cells was investigated. rBSF-2 at 200 pg/ml could induce 50% of the maximum Ig production in B lymphoblastoid cell lines, the specific activity being estimated as 5 X 10(6) U/mg. rBSF-2 augmented PWM-induced IgM, IgG, and IgA production in mononuclear cells (MNC); the effect was...