doi:10.1038/nature07378 L ETTERS Correlation between nanosecond X-ray flashes and stick–slip friction in peeling tape Carlos G. Camara1*‚ Juan V. Escobar1*‚ Jonathan R. Hird1 & Seth J. Putterman1 Relative motion between two contacting surfaces can produce visible light‚ called triboluminescence1. This concentration of diffuse mechanical energy into electromagnetic radiation has previously been observed to extend even to X-ray energies2. Here we report that peeling common adhesive tape in a
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Modern computer monitors can display a wide variety of information‚ including text‚ icons (pictures representing commands)‚ photographs‚ computer rendered graphics‚ video‚ and animation. Most computer monitors use a cathode-ray tube (CRT) as the display device. A CRT is a glass tube that is narrow at one end and opens to a flat screen at the other end. The CRTs used for monitors have rectangular screens‚ but other types of CRTs may have circular or square screens. The narrow end of the CRT contains
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innovations in the field of technology has made way new models of Televisions in the market like the LED /LCD and it had shown the exit door for the CRT model TV With LCD/LED TV sales in India gaining momentum quickly‚ 2010 was the last year that Cathode Ray Tubes (CRTs) can lay claim as the leading television display type in the country on a revenue basis‚ according to a research report The above chart shows the sales of CRT vs LED in the recent years which is quite evident that the CRT model TV is growing
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very useful information to absorb into my brain. Knowing that you can plug 127 USB devices simultaneously was something I was not aware of. For many of these ports‚ USB is rapidly replacing these old technology connections. 1.09 Video- CRT (Cathode Ray Tube) and LCD (Liquid Crystal Display) Specifications- screen size‚ contrast ratio‚ refresh rate for CRT‚ response time for LCD‚ interlacing‚ dot pitch‚ pixel pitch and resolution CRT Resolution- 640x480‚ 800x600‚ 1024x768‚ higher is better LCD Resolution-
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ICT notes What is hardware?- components such as keyboards‚ monitors‚ a mouse the system unit‚ and external devices‚ such as a printer An input device is used for putting information into the computer‚ i.e. a keyboard‚ for imputing words and data. An output device would be a device‚ like a monitor‚ a monitor will display things to you. The types of computer- a microcomputer (PC) – a mainframe computer can be used by many people at a time‚ and is able to carry out intensive tasks. A minicomputer
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of Browser software ? Are cookies bad ? Explain. List four precautions for safe browsing. BCS-011 2 7 6 8 6 3. (a) Compare and contrast the characteristics of the following : (i) (ii) (b) Dot matrix printer versus Laser printer Cathode ray tube monitors versus liquid crystal display monitors. 6 (c) "Latest word
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Ninety-nine percent of households in The United States own a television set. Americans everywhere watch hours of TV. However‚ television has not always been the way it is now. Over the years‚ television and television broadcasting has had several innovations. There are three innovations that are particularly pivotal in creating the kind of TV that existed today. These innovations are as follows: The adoption of RCA’s color TV system‚ the conversation from standard analog TV to high-definition digital
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Hazards of Electronic waste Electronic waste‚ e-waste‚ e-scrap‚ or Waste Electrical and Electronic Equipment (WEEE) describes loosely discarded‚ surplus‚ obsolete‚ or broken electrical or electronic devices. Informal processing of electronic waste in developing countries causes serious health and pollution problems. Some electronic scrap components‚ such as CRTs‚ contain contaminants such as lead‚ cadmium‚ beryllium‚ mercury‚ and brominated flame retardants. Even in developed countries recycling
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spectrum to create radio‚ so could TV waves be separated to transmit visual images. During the late 1800’s several technological developments set the stage for television. The invention of the cathode ray tube (CRT) by German Physicist Karl Ferdinand Braun in 1897 played a vital role as the progenitor of the picture tube. In the 1950’s television
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What are the Parts of Computer? The Parts of a Desktop Computer are: 1. System unit The system unit is the core of a computer system. Usually it’s a rectangular box placed on or underneath your desk. Inside this box are many electronic components that process information. The most important of these components is the central processing unit (CPU)‚ or microprocessor‚ which acts as the "brain" of your computer. Another component is random access memory (RAM)‚ which temporarily stores
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