In a world of ubiquitous presence of electrons can you imagine any other field displacing it? It may seem peculiar, even absurd, but with the advent of spintronics it is turning into reality.

In our conventional electronic devices we use semi conducting materials for logical operation and magnetic materials for storage, but spintronics uses magnetic materials for both purposes. These spintronic devices are more versatile and faster than the present one. One such device is spin valve transistor.

Spin valve transistor is different from con ....etc

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EGR SYSTEM FOR INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING THE SAME

Abstract:

An EGR system includes a high-pressure EGR passage that provides communication between an exhaust pipe, at a portion upstream of a turbine of a turbocharger, and an intake pipe, at a portion downstream of a compressor; a low-pressure EGR passage that provides communication between the exhaust pipe, at a portion downstream of the turbine, and the intake passage, at a portion upstream of the compressor; an ....etc

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SYNOPSIS
Until recently, a manufacturer used one or more camshafts (plus some pushrods, lifters and rocker arms) to open and close an engine's valves. The camshaft/camshafts was turned by a timing chain that connected to the crankshaft. As engine rpm's rose and fell, the crankshaft and camshaft would turn faster or slower to keep valve timing relatively close to what was needed for engine operation. Unfortunately, the dynamics of airflow through a combustion chamber change radically between 2,000 rpm and ....etc

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i want a seminar topic about emission control technique with ppt. ....etc

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ABSTRACT
The Present scenario of Fuel Consumption is well known to everyone. Everyday
technical people talk about the depleting Fuel sources and Exhaust hazards.
Particularly about the Diesel engines find their importance more than the Petrol
engines due to their operating cost and Fuel consumption But Diesel engines have
their demerits in the area of Exhaust and Power loss. Necessary steps have to be
taken in order effectively use the Fuel available. We have brought the UTILIZATION
OF SIX STROKE ENGINES which ....etc

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INTRODUCTION
Ball valves are most widely used valves for flow control in fluid flow lines for wide range of temperature changes (-200°C to 500°C).Most of the outlet valves of chemical plant storage were installed with ball valves for sudden closing and opening purposes. For petroleum and chemical plants it is very convenient to operate with ball valves.
Ball valves are used in situations where tight shut-off is required. The type of seat can vary with the valve pressure rating and m ....etc

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....etc

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-dual-fuel-six-stroke-engine-with-egr-technology ....etc

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how dilution of intake charge is takes place by exhaust gas? ....etc

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