A relatively new therapy in the treatment of hemorrhoids is transanal hemorrhoidal dearterialization (THD). We report a case of brain abscess caused by Streptococcus milleri following THD. Although a brain abscess after drainage of a perianal abscess has been described in the literature, no report exists of a brain abscess following treatment of hemorrhoids. A healthy 51-year-old man with hemor...

The Harmonic Cancellation Technique (HCT) is a modulation technique able to reduce the output voltage THD in Auxiliary Railway Power Supplies which supply both a linear and a well-known non linear load, helping the manufacturer to achieve the output voltage THD specifications. It is based on the pre-distortion of the inverter output voltage, through the analytical determination of the IGBTs swi...

This paper presents the comparison of various Pulse Width Modulation (PWM) strategies for the three phase Diode Clamped Multi Level Inverter (DCMLI). The main contribution of this paper is the proposal of new modulation schemes with Variable Amplitude (VA) and various new schemes adopting the constant switching frequency and also variable switching frequency multicarrier control freedom degree ...

In this paper, a reconfigurable, low power four quadrant memristor and carbon nanotube field effect Transistor (CNFET) based analog multiplier is proposed. The circuit is verified by extensive HSPICE simulations using experimentally verified memristor and Stanford CNFET models that have been calibrated for 90% accuracy at the 32nm technology node. The proposed multiplier has an input range of ±...

The conventional line commutated ac-to-dc converters/ inverters have square-shaped line current which contains higher-order harmonics. Moreover, it requires a costly and bulky dc inductor or choke. The line current with the high harmonic contents generates EMI and therefore it causes more heating of the core of distribution or power transformers. Alternatively, PWM based inverters using MOSFET/...

A new passive Power Factor Corrector (PFC) based on Valley Fill (VF) is proposed for an off-line Flyback converter. By adding an extra winding which is magnetically coupled to the Flyback transformer and electrically coupled to the VF, higher Power Factor (PF) and lower Total Harmonic Distortion (THD) can be achieved. The proposed circuit uses a high frequency inductor, low voltage capacitors t...

This paper shows a preliminary study about the output voltage modulation of modular battery system based on seven-level cascaded H-bridge inverter used for vehicle propulsion. Two generally known techniques, pulse width (PWM) and fundamental selective harmonic elimination (FSHE), are extensively compared such an innovative considering EVs’ broad torque-speed range. The losses, as well inverter-...

3 (Assistant Professor, Department of electrical engineering, Rajasthan technical University kota, (India) ABSTRACT In recent years, active power filters has been widely studied. A lot of active power filtering methods has been proposed to reduce total harmonic distortion (THD) of source current and to improve the power factor on electrical system. Several advance control strategies are based o...