Thermo acoustic Refrigeration is based on the principles of creation of temperature gradient from sound waves and this theory was first developed in 1960s. Unlike vapour compression system, Thermo acoustic engines uses inert gases which is safe and no adverse effect on the atmosphere like the depletion of ozone layer and global warming.

Even though acoustic Refrigeration is efficient and cost effective its commercial application is warranted the need of more R&D efforts for technology up gradation and standardization without which its eff ....etc

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Automatic Ventilation Control

Introduction
This article describes the design of a portable automatic ventilation control system that also processes arterial oxygen saturation (SpO2) data from a pulse oximeter. The system, built around Freescale’s 8-bit MC9S08QG4 microcontroller (MCU), is designed to be a portable, automatic replacement for manual pulse oxygen and ventilation monitoring and control, requiring less human interaction during surgery. It can be particularly useful during surgery on infants. Overview All tissue ....etc

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OPTIMUM DESIGN OF AN ACOUSTIC ENCLOSUREFORDIESEL GENERATOR
Project presentation on OPTIMUM DESIGN OF AN ACOUSTIC ENCLOSURE FOR DIESEL GENERATOR


What is an acoustic enclosure
An acoustic enclosure is a containerized vessel used for housing generators to :
Reduce noise levels.
Improve reliability and durability of generator sets (gensets).
Easy serviceability.
High uptime of genset.
Improved aesthetic of genset.
Better working conditions.



Acoustic enclosures
Problem statement
....etc

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Presented By:
Reena Kumari
M.Tech (ETC)
Roll No: 851015
3rd semester,2009

Introduction
Goal:
To design a efficient MAC protocol for underwater acoustic sensor network suitable for multi-hop network

Different emphasis from mid-semester surveys:
Challenges and opportunities of Physical channel of underwater communication(already discussed)
Studied different MAC protocol as introduced by different authors→ (already discussed)
Comparison between MAC’s and their challenges (already discussed)

....etc

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Acoustic cryptanalysis is a side channel attack which exploits sounds, audible or not, produced during a computation or input-output operation. In 2004, Dmitri Asonov and Rakesh Agrawal of the IBM Almaden Research Center announced that computer keyboards and keypads used on telephones and automated teller machines (ATMs) are vulnerable to attacks based on differentiating the sound produced by different keys. Their attack employed a neural network to recognize the key being pressed. By analyzing recorded sounds, they were able to recover the tex ....etc

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This article is presented by:Dr. P. S. Paul
Dept. of Mining Engineering
Indian School of Mines University, Dhanbad

INTRODUCTION

Tunnels or drifts are essentially blind headings till they are connected to shafts or adits thus posing a real challenge to ventilation engineers.

The work place environment in tunnels is greatly influenced by the ventilation method, selection of proper fan and ....etc

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Heat Recovery Ventilation

Introduction


Heat recovery ventilation, also known as HRV, mechanical ventilation heat recovery, or MVHR, is an energy recovery ventilation system using equipment known as a heat recovery ventilator, heat exchanger, air exchanger, or air-to-air heat exchanger which employs a counter-flow heat exchanger (countercurrent heat exchange) between the inbound and outbound air flow.
HRV provides fresh air and improved climate control, while also saving e ....etc

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Prepared by:
Christopher P. Diehl, Benjamin E. Henty, Nikhil Kanodia, and Daniel D. Stancil


Abstract
An alternative method of distributing RF in buildings is proposed in which the heating and ventilation ducts are used as waveguides. Because of the relatively low waveguide loss, this method may lead to more efficient RF distribution than possible with radiation through walls or the use of leaky coax. Further, the use of existing infrastructure could lead to a lower-cost system. Initial experimental results are p ....etc

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BRTHR ! i wnt to giv seminar on Heat Ventilation and Air Conditioning(HVAC),So plz post its ppt and abstract.............plz. ....etc

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PRESENTED BY:
LALIT SHARMA


VENTILATION IN BUILDINGS
What is Ventilation ?
The process of removing used air by fresh air from buildings and spaces is called ventilation. This is done by Natural or Artificial methods
Effects of Ventilation :- 
1. To remove the used air from spaces/buildings.
To supply oxygen for humans.
Remove excessive moisture.
Remove excessive heat.
Cool the surroundings and freshen up the atmosphere in the building.
Composition of Air
Nitrogen 78%
Oxygen ....etc

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