HISTORY OF FIBER OPTICS * In 1840‚ Daniel Colladon and Jacques Babinet demonstrated the principle of guiding light by refraction. * It was followed by a public demonstration by John Tyndal in 1852. In 1870‚ Tyndal wrote about the property of total internal reflection in his book about the nature of light. * In 1880‚ Alexander Graham Bell and Sumner Tainter invented the Photophone‚ a device capable of transmitting sound waves over beam of light. This is considered as mankind’s first attempt
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Graph 1‚ illustrates the pH of each quadrat. The pH in Quadrat 1 was more acidic than the pH in Quadrat 2‚ 3‚ and 4 this is due to the slope of the ground (refer to Graph 8)‚ different soil substrate and the decomposition of organic matter. As can be seen from Graph 8‚ the soil pH increased with a decrease in the slope of the ground. In Quadrat 1‚ the soil had a pH of 7.5 due to having a higher soil elevation of -8° in comparison to Quadrat 2‚ 3 and 4‚ in which the slope of the ground was -2°‚ -2°
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Silaba Mpasu Physical Networking Unit 6 Exercise 1 Connector Installations Twisted-pair cable On a TWISTED PAIR CABLE I chose to install an RJ-45. This is the standard Ethernet connector for most systems used today. I would first measure out the length of cable that I would need. I would then use a wire cutter to cut the length that I need‚ leaving enough room for corrections and to open the wire. I would then use wire strippers to remove a small piece of the outer most jacket. I would then choose
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1. Triple DES Triple DES was designed to replace the original Data Encryption Standard (DES) algorithm‚ which hackers eventually learned to defeat with relative ease. At one time‚ Triple DES was the recommended standard and the most widely used symmetric algorithm in the industry. Triple DES uses three individual keys with 56 bits each. The total key length adds up to 168 bits‚ but experts would argue that 112-bits in key strength is more like it. Despite slowly being phased out‚ Triple DES still
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Influences of Fiber Optics Introduction: People have been trying to improve communications over the centuries. Communication plays a very important role in everyday life. The advancement of the world mostly depends on how we share the information with the rest of the world. Fiber optics is making this task easier and quicker. It is currently the fastest internet technology. Fiber optic is a technology of transmitting light through very thin flexible glass or plastic fibers. It is one of the fastest
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communication channel (as in a telephone‚ radio‚ or computer) caused by transference of energy from another circuit (as by leakage or coupling) Waveguides- a device (as a duct‚ coaxial cable‚ or glass fiber) designed to confine and direct the propagation of electromagnetic waves FTTH- the installation and use of optical fiber from a central point directly to individual buildings such as residences‚ apartment buildings and businesses to provide unprecedented high-speed Internet access. Simplex- allowing
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CHAPTER 10 Acquisition and Disposition of Property‚ Plant‚ and Equipment ANSWERS TO QUESTIONS 1. The major characteristics of plant assets are (1) that they are acquired for use in operations and not for resale‚ (2) that they are long-term in nature and usually subject to depreciation‚ and (3) that they have physical substance. 2. The company should report the asset at its historical cost of $420‚000‚ not its current value. The main reasons for this position are (1) at the date of acquisition
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Unit 1 Exercise 1. Local Exchange Unit 1 Exercise 1. Local Exchange NT1310 The purpose of a Network is to share data. To make this possible‚ you have to be able to connect to other computers. To make this enticing to people to want to take advantage of this technology‚ it has to be simple not so complex. This sounds a little difficult to understand as far as a qualified answer‚ but to sum things up that is it. The question to ask and that many people don’t consider is how data is transferred from
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1. List the patients that you took care of this week (one initial only); their age; gender; and primary diagnosis. * S. 12 year old‚ female diagnosis with Vaso Occlusive Sickle Cell Anemia. 2. List the medications that you administered this week: * Hydroxurea 700mg PO‚ Normal Saline 1000ml 125ml/ hr.‚ Enalapril 20 mg PO‚ Morphine 1mg IVP 3. List procedures you performed or observed this week: * Medication administration‚ physical assessment‚ IV pumps‚ IV syringes‚ Oxygen administration. 5. State
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Fiber Optic Safety Rules 1) Keep all food and beverages out of the work area. If fiber particles are ingested they can cause internal hemorrhaging 2) Do not smoke while working with fiber optic systems. 3) Always wear safety glasses with side shields. Treat fiber optic splinters the same as you would glass splinters. 4) Never look directly into the end of fiber cables until you are positive that there is no light source at the other end. Use a fiber optic power meter to make certain the
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