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    Cavity Resonator

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    however‚ only a few very simple shapes are used because such shapes simplify the configuration of the electromagnetic field and the design and manufacture of resonators. These shapes include right circular cylinders‚ rectangular parallelepipeds‚ toroids‚ and spheres. It is convenient to regard some types of cavity resonators as sections of hollow or dielectric wave guides limited by two parallel planes. The solution of the problem of the natural (or normal) modes of oscillation of the electromagnetic

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    Desulfator

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    Battery Desulfator Errata In my battery desulfator article on page 84 of HP77‚ the value for C2 should have been 0.0022 ìF‚ not 0.022 ìF. My mistake. I have put up a Web page that will give more details to help you build and use the desulfator circuit. I will place updates there‚ and will add a guestbook soon to allow comments and questions to be posted. I encourage a group effort in this‚ since I don’t have all the answers. Thanks. Alastair Couper kalepa@shaka.com http://shaka.com/~kalepa/desulf

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    Transformers

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    Transformer Introduction The transformer is one of the simplest of electrical devices. Its basic design‚ materials‚ and principles have changed little over the last one hundred years‚ yet transformer designs and materials continue to be improved. Transformers are essential in high voltage power transmission providing an economical means of transmitting power over large distances. The simplicity‚ reliability‚ and economy of conversion of voltages by transformers was the principal factor in the

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    HIGH PERFORMANCE COMPUTING: DESIGN‚ BUILD AND BENCHMARK A LINUX CLUSTER by GOH YOKE LOONG KEM 050024 Semester 1 Session 2008/09 Final year research project report submitted to the Faculty of Engineering University of Malaya in partial fulfillment of the requirement to be Bachelor’s degree of Engineering DEPARTMENT OF MECHANICAL ENGINEERING ENGINEERING FACULTY UNIVERSITY OF MALAYA October 2008 ABSTRACT Nowadays almost every industry needs fast processing power especially in engineering field

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    IEEE SENSORS JOURNAL‚ VOL. 6‚ NO. 3‚ JUNE 2006 631 Magnetic Sensors and Their Applications James Lenz and Alan S. Edelstein Abstract—Magnetic sensors can be classified according to whether they measure the total magnetic field or the vector components of the magnetic field. The techniques used to produce both types of magnetic sensors encompass many aspects of physics and electronics. Here‚ we describe and compare most of the common technologies used for magnetic field sensing. These include

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    Benefits of Biophotonics

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    History Alexander Gurwitsch around 1930 Around 1923 Alexander Gurwitsch discovers an "ultraweak" photon emission from living systems (onions‚ yeast‚...)‚ since he suggested connections between photon emission and cell division rate. He calls this photonemission "mitogenetic radiation". His experiments indicate that the wavelength is in the range around 260 nm (Bibliography under Gurwisch and also Ruth (1977‚ 1979)). Around 1950: Russian scientists rediscover "ultraweak photon emission"

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    Quantum Computing

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    NOTES ON QUANTUM COMPUTING AND RELATED TOPICS Abstract These notes are intended as a simple introduction to the new field of quantum computing‚ quantum information theory and quantum cryptography. Undergraduate level quantum mechanics and mathematics is required for an understanding of these lectures. After an introduction to qubits and quantum registers‚ we introduce the key topics of entangled states and quantum logic gates. For two qubit states‚ we introduce the four Bell states as

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    LEVEL 2 UNITChapter 204 1 Principles of electrical science 11 Level 2 Electrical Installations (Buildings and Structures) This chapter covers: Chapter 1 the principles of electricity the principles of basic electrical circuits the principles of magnetism and electromagnetism the operating principles of a range of electrical equipment the principles of basic mechanics the principles of a.c. theory electrical quantities in Star Delta configurations. LO1 Matter – something that has weight

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    english literature

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    IMPORTANT QUESTIONS IN PHYSICS (CLASS XII) ELECTROSTATICS One mark questions. 1. If a point charge is rotated in a circle of radius r around a charge q‚ what will be the be the work done? 2. Does the electric potential increase or decrease along the electric line of force? 3. Give the relation between electric intensity and electric flux. 4. What is the dielectric constant of a metal? 5. What is the potential energy of two equal negative point charges 2μC each held 1m apart in air?

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    abcd

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    PHYSICS (Theory) Time allowed : 3 hours Maximum Marks : 70 General Instructions: (i) All questions are compulsory. (ii) There are 30 questions in total. Questions 1 to 8 are very short answer type questions and carry one marks each. (iii) Questions 9 to 18 carry two marks each‚ questions 19 to 27 carry three marks each and questions 28 to 30 carry five marks each. (iv) There is no overall choice. However‚ an internal choice has been provided in one question of two marks‚ one question

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