most internal devices are self-controlled, they can limit their own operation according to the needs of the patient, such as a pacemaker. The power to operate these types of devices is supplied by external battery, or created by radio-frequency signals running through inductive coupling links. This creates enough power to keep the device running without the aid of external power sources, and makes the circuitry less complicated, even though the power must be converted to DC or inverted to AC.
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range of components, devices and systems, from tiny microchips to huge power station generators. Electrical engineering has now subdivided into a wide range of subfields including electronics, digital computers, power engineering, telecommunications, control systems, radio-frequency engineering, signal processing, instrumentation, and microelectronics. Early experiments with electricity included primitive batteries and static charges. It has been a subject of scientific interest since at least the early
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TIME) * 17 ON-LINE SERVICES * 18 SECURITY AND PRIVACY OF DATA * 19 HEALTH AND SOCIAL ISSUES * 20 EMPLOYMENT * 21 ICT IN MUSIC, LEISURE, ENTERTAINMENT | ------------------------------------------------- Knowledge of ICT Components 1. DIGITAL : • Discrete values or binary digit 2. PROCESSOR: • Control center of the computer 3. RAM:- • Volatile (temporary storage), working storage, holds programmes currently in use, • Used for writing to and reading. • Measured in gigabytes 4. ROM:-
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list identifies the key terms discussed in this chapter. The page number for each key term is provided. |802.11b (Wi-Fi), 269 |Microwave, 263 | |Analog signal, 261 |Mobile data networks, 264 | |Asynchronous transfer mode (ATM), 271 |Modem, 261
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1-1 : Introduction :- Increased use of digital images in recent years due to the availability of echnology equipment Has made the process of dealing with images of things possible, onventional cameras are based physicist based controls Lighting by the user entering the lens by controlling the amount and direction of light, while the camera Digital not only require a simple knowledge by the user, and the principle of its work depends on converting light into Electrical discharges, and converts
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in a digital format, the process of digitizing has become central to the world of art and multimedia. History of Digitizing: Digital image processing began with work done through the Jet Propulsion Laboratory in California in the 1960s and consisted of digitizing television images of the moon’s surface sent by the spacecraft Ranger 7. Other uses included military intelligence, urban planning, medicine (such as the CAT Scan and the MRI), and of course digital video and photography (Digital Imaging
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Computer System ……………………………………………………………... 25 Computer Hardware ………………………………………………………….. 27 - Input devices/hardware .………………………………………………..27 - Output devices/ hardware..…………………………………….…….....39 - Storage hardware /devices ……………………………………………..49 - Processing devices/hardware …………………………………………..63 - Communication devices/hardware…………………………………….. Computer Software …………………………………………….……………...69 - Utility program …………………………………………………………70 - Operating system ……………………………………………….………72 - Programming languages
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synchronous digital hierarchy (SDH). Sonet uses sync TDM technique with a master clock. The master clock is used for predictability. Sonet has high bandwidth availability and configuration facility which has its significant advantages: • Flexible architecture, so it can accommodate future applications. • Supports variety of transmission rate. • Standardized, so it can connect multiple vendor equipment. • A synchronous that greatly simplifies the interface to digital switches, digital cross connect
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retrieve and organize information for its human master. This brain is supplied with parts that provide allow for input to it and allow it produce output for presentation to the one using it. Central Processing Unit The thinking part of the brain of the computer is the CPU or Central Processing Unit. This component provides all the control and manages calculations and manipulation of data. Computer manufacturers are always trying to squeeze more speed and multiprocessing capability (doing multiple
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Digital imaging research paper Mackenzie omeara Digital imaging is the creation of photographic images such as of a physical scene or of the interior structure of an object. The term is often assumed to imply or include the processing, compression, storage, printing, and display of images. Digital imaging can be classified by the type of electromagnetic radiation or other waves whose variable attenuation, as they pass through or reflect off objects, conveys the information that constitutes the
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