The photoacoustic effect - production of sound from light - may be exploited for detection and localization of gas leaks on the surface of otherwise sealed components. The technique involves filling the test component with a photoactive tracer gas, and irradiating the component to produce photoacoustic sound from any leak site where a tracer gas cloud forms. This presentation describes experiments utilizing 10.6-micron radiation from a carbon-dioxide laser with sulfur hexafluoride as a tracer gas. Here, photoacoustic sounds from a laminar plume ....etc

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Presented By
FAHAD AZIZ


What is Spectroscopy?
 The study of how 'species' (i.e., atoms, molecules, solutions) react to light. Some studies depend on how much light an atom absorbs. The electromagnetic radiation absorbed, emitted or scattered by the molecule is analyzed. Typically, a beam of radiation from a source such as a laser is passed through a sample, and the radiation exiting the sample is measured. Some, like Raman, depend on a molecule's vibrations in reaction to the light.
 Sir Chandrashekha ....etc

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Drug delivery to lymphoidal cells of immune network ....etc

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Motivation for In Vivo Optical Imaging (Partial List)
• Safety — Non-ionizing radiation: photon energy is ~2 eV
• Physics — Molecular structure and composition of tissue
• Optics — High intrinsic contrast. E.g., absorption probes
 Oxy-hemoglobin & deoxy-hemoglobin
 Melanin
 Lipid
 Water
 DNA & RNA
• Physiology — Endogenous contrast for functional imaging
 Concentration of hemoglobin (angiogenesis)
 Oxygen saturation of hemoglobin (hyper-metabolism)
 Cell nuclei
 ....etc

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Schizophrenia affects one in a hundred Canadians at some point in their life. This disorder is characterized by auditory hallucinations, delusions, lack of motivation and thought disorder. Antipsychotic drugs improve some of these symptoms, but there is no cure and the cause of schizophrenia is still unknown. Current models suggest that a brain lesion in-utero, in conjunction with neurodegeneration, may result in the symptoms of the disease. These processes may result in abnormal brain function, manifested as changes in brain metabolism.



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design review of any product system from strength and rigidity considerations ....etc

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IMPEDANCE SPECTROSCOPY
Presented by
Manu Gopal S
Applied Electronics and Instrumentation
College Of Engineering, Trivandrum
2007-11 batch



CONTENTS
Impedance spectroscopy
Its need and uses
Experimental set up
Circuit model for
Bare electrodes
Cell coated electrodes

Results
Conclusion
References

What is Impedance spectroscopy
EIS measures the dielectric properties of the medium as a function of frequency.
It is based on the interaction ....etc

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literature review for wind energy ppt ....etc

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first suggest the product for design reivew of any product for aesthetic and ergonomic consideration then give the pdf and related ppt for that....plz help us... ....etc

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OPERATING SYSTEMS Review



INTRODUCTION

What is operating system?
Manages the computer hardware.
Act as intermediately between user and hardware.
Provides environment for applications/ processes to work better.
In how many parts a computer system can be divided?
Hardware,
Os
Application Programs
Users.


What is meant by context switching in an OS ?
A context switch is the computing process of storing and restoring the state (context) of a CPU suc ....etc

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