The effect of sub surface defects in surface roughness monitoring through ultrasonic flaw detector.
Objective
 To study the effect of sub surface defects in surface roughness monitoring through ultrasonic flaw detector.
 To study the sizing of defects.
Ultrasound Concepts
• All sound waves, whether audible or ultrasonic, are mechanical vibrations involving movement of the medium in which they are traveling. A sound wave may be transmitted through any material which behaves in an elastic manner.
....etc

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Help... Difference between 180 degree and, 120 degree mode of conduction needed... ....etc

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need the information on topic, comparision of sed tv over others like lcd,crt,plasma tv etc, why sed tv is better than others, its future scope,also any further versions of sed tv.also an perfect ppt covering all the topics in an appropriate manner.
pls i hope u help me ....etc

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Analysis of Conduction and Switching Losses of A Matrix-Z-Source Converter for Automotive ISA 42 V System
ABSTRACT
The model of the conduction and switching loss for a
recently proposed matrix z-source converter (MZC) was
analytically established in this paper. The model offered the
basis for the thermal design for the converter.
I. INTRODUCTION
Voltage source inverters (VSI) have been used widely for
a long time in applications where bi-directionally converting
AC power into DC power is required. However such
co ....etc

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Surface conduction Electron emitter Display


The SED technology has been developing since 1987. The flat panel display technology that employs surface conduction electron emitters for every individual display pixel can be referred to as the Surface-conduction Electron-emitter Display (SED). Though the technology differs, the basic theory that the emitted electrons can excite a phosphor coating on the display panel seems to be the bottom line for both the SED display technology and the traditional ....etc

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i want to give seminar on sed so i want sed ppt so if you have can u display it so well as the report ....etc

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I am a third year electronics and communication engineering student in search of recent seminar topics in the above field.Kindly give me detailed information on the topic SED. ....etc

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A Surface-conduction Electron-emitter Display (SED) is a flat panel display technology that uses surface conduction electron emitters for every individual display pixel. The surface conduction electron emitter emits electrons, that excite a phosphor coating on the display panel which is similar to the basic concept found in traditional cathode ray tube (CRT) televisions. This means that SEDs can combine the slim form factor of LCDs with the high contrast ratios and can also refresh rates making the picture quality of CRTs better .The researches ....etc

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electrical conduction in -AgGaO
2
delafossite thin films
K. A. Vanaja, R. S. Ajimsha, A. S. Asha, and M. K. Jayaraj
a
Optoelectronics Devices Laboratory, Department of Physics, Cochin University of Science and Technology,
Kochi 682022, India
Received 28 December 2005; accepted 26 March 2006; published online 23 May 2006
Thin films of delafossites of -AgGaO
2
were prepared on -Al
2
O
3
0001 and on Si 100 single
crystal substrates by pulsed laser deposition. The films have a band gap of 4.12 eV and a
transparency of more than 50% ....etc

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Advantages of 120degree mode of inverter operation over 180degre mode ....etc

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