4.4 Quadrature phase shift keying (QPSK) Quadrature phase shift keying (QPSK) has twice the bandwidth efficiency of BPSK since two bits are transmitted in a single modulation symbol. In the phase of the carrier takes on one of four equally spaced values‚ such as 0‚ π/2‚π and 3π/2‚ where each value of phase corresponds to a unique pair of message bits. The Quadrature phase shift keying (QPSK) signal for this set of symbol states may be defined as s_QPSK (t) =√(〖2E〗_s/T_s ) cos[〖2πf〗_c t +(i-1)π/2]
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Many schools and parks have moved to artificial turf claiming benefits for maintenance costs and aesthetics but have ignored other important factors when choosing a playing surface. Natural grass provides a safer play surface and is better for the environment than artificial turf. Injuries are more common on artificial turf‚ especially concussion‚ heat related and joint stress issues. (Meyers M‚ 2004.)Surface hardness is an important factor in head injuries caused by playing surface contact. (Penn
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We’re living in an unsustainable world of mass deforestation‚ over consumption‚ pollution and malnutrition because of our ignorance and reliance on fossil fuels and synthetic fibres. If there were something that could provide a sustainable solution to heal the world‚ wouldn’t we take advantage of it? Fortunately there is something; Hemp. It has been said that Hemp can be used in over 25‚000 products including; food‚ textiles‚ plastics‚ fuel and paper. It grows in 100 days with no wastage‚
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Refractive index measurement is actually a measurement of the speed of light in a medium. The speed of light (usually denoted by c) is 299 792 458 m/s in vacuum. In other media the speed of light is lower than this value‚ and the refractive index‚ R.I.‚ of a medium is a measure of how much the speed of light is reduced in the medium. The refractive index (n) of a medium is defined as the ratio of speed of light in vacuum (c) in to that in the medium (v) The speed of light in a medium depends on
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SNC2D0 Exam Review BIOLOGY: Cells‚ Tissues‚ Organs and Organ Systems 1. Compare and contrast the following terms: a) Endoplasmic reticulum and golgi apparatus b) Mitochondria and nucleus c) Cell wall and cell membrane d) Cell cycle and mitosis e) Cell cycle and cancer f) Tissue and organ system g) Digestive system‚ circulatory system‚ and respiratory system h) Root system and shoot system i) Phloem and xylem vessel 2. On a separate piece of paper‚ draw a labeled diagram of an animal
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Light Reflection and Refraction Pre-Lab using PhET I) Introduction: When a light ray strikes a smooth interface separating two transparent materials (like air‚ glass‚ or water)‚ the wave is partly reflected and partly refracted (or transmitted) into the second material. For an example of this‚ imagine you are outside looking at a restaurant window. You can probably see both the inside of the restaurant (from the refracted light) and some of the street behind you (from the reflected light). Similarly
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Sean Braun Assignment 9 There are two main types of fibre optic transmitter that are in use today. Both of them are based around semiconductor technology: • Light emitting diodes (LEDs) • Laser diodes Semiconductor optical transmitters have many advantages. They are small‚ convenient‚ and reliable. However‚ the two different types of fibre optic transmitter have very different properties and they tend to be used in widely different applications. LED transmitters These fibre optic transmitters
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Looking for delta synthetic fibres case study guide? Download delta synthetic fibres case study guide delta synthetic fibres case study guide User Manuals‚ Instructions and Guides.We have that hard to find instruction manual that you must have right now. You get an information pack on any available electronic instruction guide‚ manual‚ workshop manual‚ user manual and other important documentation. Our systems locates product manuals
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What is dietary fibre? Dietary fibre‚ also known as roughage or bulk‚ includes all parts of plant foods that your body can’t digest or absorb. Unlike other food components‚ such as fats‚ proteins or carbohydrates — which your body breaks down and absorbs — fibre isn’t digested by your body. Instead‚ it passes relatively intact through your stomach‚ small intestine‚ and colon and out of your body. Fibre is commonly classified as soluble (it dissolves in water) or insoluble (it doesn’t dissolve):
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FINOLEX CABLES Ltd. Finolex Cables Ltd‚ the flagship company of the Finolex Group was established in 1958 in Pune. Today‚ it is India’s largest and leading manufacturer of electrical and telecommunication cables with a turnover in excess of Rs.16 Billion Starting with a modest beginning way back in 1958‚ Finolex has steadily grown and transformed to post a Rs. 2‚100 crore turnover in 2011-12. From modernizing plants with state of the art technology to offering innovative solutions to customers
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