Dielectric Resonator
1.Introduction
A dielectric is an electrical insulator that can be polarized by an applied electric field. When a dielectric is placed in an electric field, electric charges do not flow through the material, as in a conductor, but only slightly shift from their average equilibrium positions causing dielectric polarization. Because of dielectric polarization, positive charges are displaced toward the field and negative charges shift in the opposite direction. This creates an internal electric field which redu ....etc

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ABSTRACT
A host of novel applications and new physics could be unleashed as Micro-Electro-Mechanical Systems (MEMS) shrink towards the nano scale. The time is ripe for a concerted exploration of Nano-Electro-Mechanical-Systems (NEMS) - i.e. machines, sensors, computers and electronics that are on the nano-scale. Many years of research by university, government, and industrial groups have been devoted to developing cutting-edge NEMS technologies for enabling revolutionary NEMS devices. NEMS has revolutionized nearly ever ....etc

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THERMOACOUSTIC REFRIGERATION

INTRODUCTION

Conventional Refrigeration And Its Drawback
Thermoacoustic Refrigerator
Unpressurised System
Air as Gas Medium
Loudspeaker as Acoustic Driver


THERMOACOUSTICS
Definition
Background
Uses sound to create cooling
No moving parts inside device
Tremendous Opportunities
Saves energy
Economic potential
Good for the environment

APPLICATIONS
Heat Powered TAR
beer cooler
Coolahoop
Electrically powered TAR
spacecraft applications
Supercon ....etc

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Resonator
A resonator is a device or system that exhibits resonance or resonant behavior, that is, it naturally oscillates at some frequencies, called its resonance frequencies, with greater amplitude than at others
It oscillates at specific frequencies because its dimensions are an integral multiple of the wavelength or half-wavelength at those frequencies
Resonators are used to either generate waves of specific frequencies or to select specific frequencies from a signal
In physics and engineering the quality ....etc

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INTRODUCTION TO LASER:-
The word LASER is actually an acronym that stands for
Light Amplification by Stimulated Emission of Radiation .
Based on this principle, a very special kind of light is created,
of a form that doesnâ„¢t exist anywhere in nature. It is one
colour (monochrome) and appears as a tightly bundled,
directed beam. T.H. Maiman, a physicist from California,
USA, succeeded in building the first functioning
laser (ruby laser, with red light) in 1960.

FIRST LASER:-
....etc

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a automatic ice maker which uses thermaoacoustics ....etc

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DESIGN AND DEVELOPMENT OF HIGH-FREQUENCY THERMOACOUSTIC ENGINES FOR THERMAL MANAGEMENT IN MICROELECTRONICS
SEMINAR REPORT
Submitted by
VIBIN KOSHY THOMAS
S7-ME
Department Of Mechanical Engineering
College of Engineering, Thiruvananthapuram – 16
OCTOBER 2010





ABSTRACT

Thermoacoustic heat engines provide a practical solution to the problem of heat management in microcircuits where they can be used to pump heat or produce spot cooling of specific circuit elements. There are ....etc

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Dielectric Resonator
1.Introduction
A dielectric is an electrical insulator that can be polarized by an applied electric field. When a dielectric is placed in an electric field, electric charges do not flow through the material, as in a conductor, but only slightly shift from their average equilibrium positions causing dielectric polarization. Because of dielectric polarization, positive charges are displaced toward the field and negative charges shift in the opposite direction. This creates an internal electric field which redu ....etc

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hi Iam abuidrees.I need data about this project. please quickly ....etc

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Presented By:
S.G. Lokhre, P.R. Apte, R.Raajeev* and R. Lal*

Solid State Electronics Group
Tata Institute of Fundamental Research
Homi Bhabha Road
Colaba, BOMBAY - 400 005, India



ABSTRACT

Balanced doubly suspended structure has been used earlier for very precise high Q resonators. But here we have used the unbalanced half section which is sputter deposited with a magnetic film. The central axis acts like a torsion wire of about a micron width and thickness. The outer arm deflects downwards about the torsi ....etc

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Hello.
How to calculate cylindrical parameters by theory purpose?
In short give me idea on cylindrical DRA design steps. ....etc

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sir i want a report on free piston engine ....etc

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Seminar Report
WITRICITY
ABSTRACT
The technology used for wireless power transmission is known as witricity. Wireless power transmission is not a new idea, Nikola Tesla proposed theories of wireless power transmission in the late 1800s and early 1900s. Tesla's work was impressive, but it did not immediately lead to wide spread practical methods for wireless power transmission. Since then many researchers have developed several techniques for moving electricity over long distances without wires. Some exist only as theori ....etc

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ABSTRACT
Quantum Dots(QDs) are small conductive regions in a semiconductor, containing a number of charge carriers(from one to thousand) that occupy well defined discrete quantum states. They have typical dimensions between nanometers to a few microns .When the space at any side, around a material shrinks to 100Ã…, quantisation of the energy levels at the reduced side will occur. In quantum dots electrons are confined in all directions to a volume in space with dimensions on the order of their de Broglie wave lengt ....etc

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respected Sir.
i need help about the design parameters of Microstrip ring resnator. also how to find permitivitiy of materials with the help of ring resonator
thnkx ....etc

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sir,i want ppt of cylindrical high performance resonating antenna ....etc

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H-Shaped Dielectric Resonator Antenna for UWB application




INTRODUCTION
The extremely wide spectrum of 3.1 to 10.6 GHz with 15 bands of bandwidth greater than 500 MHz and power limit less than -41.3 dBm/MHz announced by FCC for Ultra wide band. The release of this Spectrum has rapidly increased the research in UWB technology for communications, radar imaging, and localization applications . Radio systems based on UWB technology offer opportunities for tra ....etc

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1. Introduction
Superconductivity is a phenomenon occurring in certain materials generally at very low temperatures, characterized by exactly zero electrical resistance and the exclusion of the interior magnetic field (the Meissner effect). It was discovered by Heike Kamerlingh Onnes in 1911. Applying the principle of Superconductivity in microwave and millimeter-wave (mm-wave) regions, components with superior performance can be fabricated. Major problem during the earlier days was the that the cryogenic burden has been perceived as t ....etc

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