Power quality standards (IEEE-519) require to limit the total harmonic distortion within satisfactory range caused by power electronic based devices. Our work deals with the design of hybrid active filter to reduce current perturbations produced by power electronics based devices. The Instantaneous Active and Reactive Power Method (pq) is used to perform the identification of disturbing current...

BACKGROUND Forced-air warming (FAW) is widely used to prevent hypothermia during surgical procedures. The airflow from these blowers is often vented near the operative site and should be free of contaminants to minimize the risk of surgical site infection. Popular FAW blowers contain a 0.2-μm rated intake filter to reduce these risks. However, there is little evidence that the efficiency of the...

Bandpass sampling holds much promise for the realisation of software radio receivers, particularly for mobile devices. Sampling at reduced rates eases many of the ADC requirements, and decreases power consumption, thus increasing battery lifetime, and overall receiver size. The need for very high performance programmable devices is also reduced. This paper demonstrates the importance of the ban...

Distal embolization of particulate matter complicates percutaneous coronary and peripheral interventions more often than had been recognized until recently. A number of distal protection devices are under development. The PercuSurge GuardWiretrade mark is a balloon occlusion thrombectomy device approved by the United States Food and Drug Administration for saphenous vein graft intervention. A n...

brain-computer interfaces (bci) record brain signals, analyze and translate them into control commands which are relayed to output devices that carry out desired actions. these systems do not use normal neuromuscular output pathways. actually, the principal goal of bci systems is to provide better life style for physically-challenged people which are suffered from cerebral palsy, amyotrophic la...

Digital cameras are now commonly included in several digital devices such as mobile phones. They are present everywhere and have become the principal image capturing tool. Inherent to light and semiconductors properties, sensor noise [10] continues to be an important factor of image quality [12], especially in low light conditions. Removing the noise with mathematical solutions appears thus una...

A key device in all-optical networks is the optical filter. Ring resonator filters on the basis of GaInAsP / InP with improved filter response and increased functionality using integrated semiconductor optical amplifiers are presented. 2003 Optical Society of America OCIS codes: (130.3120) Integrated optics devices, (230.5750) Resonators

We propose a super-resolution technique specifically aimed at enhancing low-resolution text images from handheld devices. The Teager filter, a quadratic unsharp masking filter, is used to highlight high frequencies which are then combined with the warped and interpolated image sequence following motion estimation using Taylor series decomposition. Comparative performance evaluation is presented...

With the continuing trends to reduce the chip size and integrates multichip solution into a single chip solution it is important to limit the silicon area required to implement parallel FIR digital filter in VLSI implementation. The Need for high performance and low power digital signal processing is getting increased. Finite Impulse Response (FIR) filters are one of the most widely used fundam...

With the increasing use of geometry scanners to create 3D models, there is a rising need for effective denoising of data captured with these devices. This thesis presents new methods for smoothing scanned data, based on extensions of the bilateral filter to 3D. The bilateral filter is a non-linear, edge-preserving image filter; its extension to 3D leads to an efficient, feature preserving filte...