Communication protocols belong to the broad class of d lscrete-event
systems. Other examples of these systems are flexible manufacturing systems,
process control systems, office information systems and VLSI circuits. The
behaviour of all of these systems can be characterized by starting and
ending times,these systems inherently involve the
consideration of the notions of concurrency, nondeterminism, time and
Therefore the formal description technique (FDT) used to the
description of a discrete-event system should be able to express these ....etc

[:=Read Full Message Here=:]

A Multi-cell Linear Power Amplifier for Driving Piezoelectric Loads
RAKESH K P
S-7 AEI
Roll No: 48
College Of Engineering , Trivandrum
2007-11 batch


Introduction
Describes about multicell amplifier , developed by connecting floating signal modules in series to drive piezoelectric devices.


PIEZOELECTRIC devices or actuators have been used as positioners or driving motors in many fields such as optics, precision machining, and fluid control, as well as in optical disk dri ....etc

[:=Read Full Message Here=:]

i would like to know about the detection of a landmine using non linear acoustic technology ...that is using sound signals to detect landmines. ....etc

[:=Read Full Message Here=:]

Power Factor Correction of Linear and Non-linear Loads Employing a Single Phase Active Power Filter Based on a Full-Bridge Current Source Inverter Controlled Through the Sensor of the AC Mains Current
Abstract:
In the last years the number of non-linear loads has been increasing rapidly. This non-linear load had drawn a current form the AC Mains with harmonic components, leading to low power factor, low efficiency, interference by the EMI, among others. A classic solution is the use of passive filters, which ....etc

[:=Read Full Message Here=:]

It is shown that several (single-mode) models (PTT, XPP) are basically special cases of the General Network model. The XPP model of Verbeeten et al (2001) is shown to give an identical response to a PTT model at high elongational rates, but the models differ in shear flow at high shear rates. The Giesekus term in the XPP model has actually no effect at any deformation rate except the generation of a second normal stress difference at small shear rates. The possibility of tailoring the shear flow response at high shear rates is explored. The res ....etc

[:=Read Full Message Here=:]

In this paper, the implementation of a shunt active power filter with a small series reactor for a three-phase system is presented. The system consists of multiple non-linear loads, which are a combination of harmonic current sources and harmonic voltage sources, with significant unbalanced components.The filter consists of a three-phase current-controlled voltage source inverter (CC-VSI) with a filter inductance at the ac output and a dc-bus capacitor. The CC-VSI is operated to directly control the ac grid current to be sinuso ....etc

[:=Read Full Message Here=:]

Abstract
An alternating current (AC) electric motor that has had its stator unrolled so that instead of producing a torque (rotation) it produces a linear force along its length is called a linear motor or linear induction motor. The most common mode of operation is as a Lorentz-type actuator, in which the applied force is linearly proportional to the current and the magnetic field.

Many designs have been put forward for linear motors, falling into two major categories, low-acceleration and high-acceleration linear motors. Low-ac ....etc

[:=Read Full Message Here=:]

Abstract
Due to increasing demand for speech communications, efficient techniques in low-rate speech coding are of interest.Here a new compression technique using root cepstral analysis has been proposed. Implementing the proposed method causes the coder to deal with root cepstrum coefficients instead of speech samples. The main idea in using root cepstrum analysis is that some of the trivial coefficients can be ignored to send toward the decoder. Thus considerable reduction in the total bit-rate is achieved. Moreover it has the advanta ....etc

[:=Read Full Message Here=:]

PRESENTED BY
ABHISHEK KUMAR


LINEAR MOTORS AND IT’S USE IN MAGLEV TRAIN
INTRODUCTION
A LINEAR MOTOR OR LINEAR INDUCTION MOTOR IS AN AC ELECTRIC MOTOR THAT HAS ITS STATOR UNROLLED SO THAT INSTEAD OF PRODUCING A TORQUE(ROTATION) IT PRODUCES A LINEAR FORCE ALONG ITS LENGTH.
HOW LINEAR MOTORS WORK
SPLIT A ROTORY MOTOR RADIALLY ALONG ITS AXIS OF ROTATION
FLATTEN IT OUT:
RESULT: A FLAT LINEAR MOTOR THAT PRODUCES A DIRECT LINEAR FORCE INSTEAD OF TORQUE.
ANALYSIS METHO ....etc

[:=Read Full Message Here=:]

This project is aimed at analyzing the available methods for solving a system of linear equations of the form n x n. Using a couple of iterative and/or direct methods, implement a program for these methods that could be run on a parallel
processor. At the end, a graph can be plotted with time taken for execution of a method considered V/s number of processors used (2, 4, 8, 32). For example following questions need to be addressed “
1. For a method considered, evaluate that as the number of processors is increased does the time taken ne ....etc

[:=Read Full Message Here=:]