Pedro Bizarro, Nicolas Bruno, and David J. DeWitt

Abstract
Commercial applications usually rely on precompiled parameterized procedures to interact with a database. Unfortunately,
executing a procedure with a set of parameters different from those used at compilation time may be arbitrarily suboptimal. Parametric
query optimization (PQO) attempts to solve this problem by exhaustively determining the optimal plans at each point of the parameter
space at compile time. However, PQO is likely not cos ....etc

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ABSTRACT
Nowadays, digital memories are used in each and every fields of day-to-day life. Semiconductors form the fundamental building blocks of the modern electronic world providing the brains and the memory of products all around us from washing machines to super computers. But now we are entering an era of material limited scaling. Continuous scaling has required the introduction of new materials.
Current memory technologies have a lot of limitations. The new memory technologies ....etc

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ABSTRACT
Audio spot lighting is a very recent technology that creates focused beams of sound similar to light beams coming out of a flashlight. By shining sound to one location, specific listeners can be targeted with sound without others nearby hearing it. It uses a combination of non-linear acoustics and some fancy mathematics. But it is real and is fine to knock the socks of any conventional loud speaker. This acoustic device comprises a speaker that fires inaudible ultrasound pulses with very small wavelength which ....etc

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Presented By:Name:- SABYASACHI SABAT
Stream:- ETE
IMPATT Diode

Introduction
When the pn junction diode is reverse-biased, then current does not flow.
However when the reverse voltage exceeds a certain value, the junction breaks down and current flows with only slight increase of voltage. This breakdown is caused by avalanche multiplication of electrons and holes in the space charge region of the junction.
The pn junction in the avalanche b ....etc

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audio spotlighting ppt free download

Abstract
Audio spot lighting is a very recent technology that creates focused beams of sound similar to light beams coming out of a flashlight. By shining sound to one location, specific listeners can be targeted with sound without others nearby hearing it. It uses a combination of non-linear acoustics and some fancy mathematics. But it is real and is fine to knock the socks of any conventional loud speaker.

This acoustic device comprises a speaker that fires inaudible ultrasound pulses with very small w ....etc

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ABSTRACT
Hypersonic sound technology from American Technology Corporation employs ultrasonic waves to create audible sound in the air. It works by using harmless ultrasonic tones that we can't hear. These tones use the property of air to create new tones that are within the range of human hearing. The result is audible sound. The acoustical sound wave is created directly in the air molecules by down-converting ultrasonic energy to the frequency spectrum we can hear. Hyper Sonic Sound is produced without the excess bag ....etc

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Presented by:
Ratish J. Punnoose

Introduction

Ex: An ultrasonic signal at 200kHz and another one at 201kHz will generate a 1kHz tone and a 401kHz signal which is inaudible to the human ear.

If an AM signal with a non-zero carrier amplitude is passed through Air, it is self-demodulated

- for more details on the topic and ppt, please follow the page link given below

http://ece.cmu.edu/ ece796/seminars/12/seminars/blacksonic.ppt ....etc

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Lin Xiao,
Zhuo Chen,
Chen Feng
Liang Liu
Zai-Qiao Bai
Yang Wang
Li Qian
Yuying Zhang
Qunqing Li
Kaili Jiang
Shoushan Fan


Abstract

We found that very thin carbon nanotube films, once fed by sound frequency electric currents, could emit loud sounds. This phenomenon
could be attributed to a thermoacoustic effect. The ultra small heat capacity per unit area of carbon nanotube thin films leads to a wide
frequency response range and a high sound pressure level. On the basis of this finding, we made practical c ....etc

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INTRODUCTION:
Since the late 1980s, parametric search, the optimization technique developed by Megiddo in the late 1970s and early 1980s, has become an important tool for solving many geometric optimization queries efficiently. The main principle of parametric search is to compute a value that optimizes an objective function f with the use of an algorithm As that solves the corresponding decision problem. ....etc

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ABSTRACT
Audio spot lighting is a very recent technology that creates focused beams of sound similar to light beams coming out of a flashlight. By shining sound to one location, specific listeners can be targeted with sound without others nearby hearing it. It uses a combination of non-linear acoustics and some fancy mathematics. But it is real and is fine to knock the socks of any conventional loud speaker. This acoustic device comprises a speaker that fires inaudible ultrasound pulses with very small wavelength which ....etc

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Although the use of parametric amplifiers for high frequency, low noise amplification is relatively recent, the principles themselves are not at all new. They were first propounded by Lord Reyleigh in the 1880s for Mechanical Systems and by R. Hartley in 1930s for electrical applications. The need for extremely low noise amplification , as in radio telescopes, space probe tracking and communications, and tropospheric scatter receivers, spurred the design of useful parametric amplifiers in the late 1950s. The low ....etc

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ABSTRACT
Audio spot lighting is a very recent technology that creates focused beams of sound similar to light beams coming out of a flashlight. By shining sound to one location, specific listeners can be targeted with sound without others nearby hearing it. It uses a combination of non-linear acoustics and some fancy mathematics. But it is real and is fine to knock the socks of any conventional loud speaker. This acoustic device comprises a speaker that fires inaudible ultrasound pulses with very small wavelength which ....etc

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HIGH SPEED MACHINING
ABSTRACT
Over the past 60 years, high speed machining (HSM) has been applied to a wide range of metallic and non-metallic work piece materials including the production of components with specific topography requirements and machining of materials with hardness of 50 HRC and above.
With most steel components hardened to approximately 32-42 HRC, machining operations currently include:
Rough machining and semi-finishing of the material
Heat treatment to achi ....etc

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Although the use of parametric amplifiers for high frequency, low noise amplification is relatively recent, the principles themselves are not at all new. They were first propounded by Lord Reyleigh in the 1880s for Mechanical Systems and by R. Hartley in 1930s for electrical applications. The need for extremely low noise amplification , as in radio telescopes, space probe tracking and communications, and tropospheric scatter receivers, spurred the design of useful parametric amplifiers in the late 1950s. The low ....etc

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DESIGN OF GAS TURBINE ENGINES USING CFD



1 INTRODUCTION
The design of individual gas turbine components using CFD is now commonplace
. Traditional design by analysis methods are increasingly being supplemented with
automated design systems and the use of optimisation systems . At the same time,
fluid machinery can now be modelled and analysed to an unprecedented level using CFD
on powerful multi-processor computers or clusters.
Although CFD can provide essential information to aid the physic ....etc

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