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    * Bluetooth is a wireless networking standard that provides short-range (about 10 meters) connectivity to electrical devices such as cell phones‚ computers and their peripherals‚ notebooks‚ and PDA’s. Data is transmitted via small radio transmitter/receivers installed in each electronic device. * There are several benefits to using this technology. Firstly‚ it does away with all the wires‚ connectors‚ and attachments needed to connect your peripherals to your computer system- whether you are

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    It’s June 23rd‚ 1876 I have arrived in Philadelphia‚ Pennsylvania for the Centennial Exposition. I am thrilled to see what new inventions will be offered today. As I walked into the Machinery Hall one specific thing caught my eye. They call it the Telephone‚ invented by Alexander Graham Bell. It’s a magical machine like the Telegraph‚ but Telephone that lets you talk to people across the country‚ but with your voices. You can have a full speaking‚ conversation with someone miles away. The problem

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    What is radio

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    into space going the speed of light‚ which is 300‚000 kilometers per second. When equipment is attached to an antenna‚ the energy becomes radio waves. Some of the energy can be received by another antenna‚ and using a radio receiver‚ the energy connects the transmitter and receiver. Information that is added to the radio waves can be sent as messages known as television programs‚ walkie talkies‚ and other sources. Radio wave travel can vary with frequency and wavelength of the signal. The lower the

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    and receiving technique. This is achieved by receiving IR rays from a reflecting spot on the shaft of the motor. The speed of the motor is controlled by PWM from the microcontroller. The project uses a microcontroller and a pair of sensors (Transmitter and receiver) which gives the output to the microcontroller. The timer and the counter of the microcontroller gives the speed of the rotating shaft. The microcontroller is interfaced with an LCD to display the speed. The LCD directly displays the speed

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    Power Line Coomunications

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    POWER LINE COMMUNICATION “Power line communications (PLC) is a global technology with worldwide interest in its development. In its simplest terms‚ PLC modulates communication signals over existing power lines. This enables devices to be networked without introducing any new wires or cables. This capability is extremely attractive across a diverse range of applications that can leverage greater intelligence and efficiency through networking.” - Texas Instruments. Introduction: Let me start

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    the land. During time of distress‚ a sinking ship would use a radio messaged nearby vessels and stations on the land to ask for aid. The law required ships at sea to leave their radio on 24 hours a day and required federal licensing of all radio transmitter ( RADIO ACT OF 1912 ). Edwin Armstrong made an early radio used amplitude modulation ( AM )‚ which have static and poor sound quality for music. Frequency modulation ( FM ) had less static but better sound quality for music. The radio also saw a

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    Application of Ultrasound In Medical And Industrial field The term ultrasound defines sound waves of frequencies above the threshold of human hearing‚ 20 kHz. Ultrasound may be propagated in a variety of modes through different materials and offers a wide range of both medical and industrial applications. In the medical field‚ the development of a foetus is routinely monitored by ultrasound; cardiac irregularities‚ along with kidney stones and osteoporosis may all be identified. Ultrasound also

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    NAME - IKWUETOGHU MARTINS COURSE - BUS 2122: BUSINESS COMMUNICATION DEPARTMENT – ACCOUNTING COLLEGE – MSAT DATE – 11th of MAY‚ 2010 THEORIES AND MODELS OF COMMUNICATION. INTRODUCTION Currently‚ many definitions of communication are used in order to conceptualize the processes by which people navigate and assign meaning. Communication is also understood as the exchanging of understanding. Additionally the biocommunication theory investigates communicative processes within and among

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    Content TABLE OF CONTENT ACKNOWLEDGEMENT 7 1.0 Introduction 8 2.0 History of Optical Fiber 9 3.0 Construction of Optical Fiber 12 4.0 Guiding Mechanism in Optical Fiber 13 5.0 Basic Components of OFC 15 5.1 Transmitter 15 5.2 Fiber 15 5.3 Receiver 15 5.4 Process 16 6.0 Principle of optical transmission 16 6.1 Refractive Index 16 6.2 Snell’s Law 17 6.3 Critical Angle 17 6.4 Total Internal Reflection 18 6.5 Acceptance Cone 19 6.6 Numerical Aperture

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    ­ELECTRONIC COMMUNICATIONS SYSTEMS Wayne Tomasi‚ 5th edition Introduction to Electronic Communications­ Electricity began in 1837 when Samuel Finley Breese Morse invented the first workable telegraph. In 1894‚ Marchese Guglielmo Marconi successfully transmitted the first wireless radio signals through Earth’s atmosphere. In 1906‚ Lee DeForest invented the triode vacuum tube. Commercial radio broadcasting began in 1920 when radio station KDKA began broadcasting amplitude-modulated

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