telephones‚ personal digitalassistants (PDAs)‚and wirelessnetworking..Also.it.consists.of.certain.applications.include.GPSdevices ‚computer.mice‚keyboards ‚headsets‚ headphones‚satelliteTV ‚ broadcast television an cordless telephones.The basic block diagram of wireless communication is shown in Fig(1.1).
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equivalent representation in the frequency domain. The difference is that while the DFT takes a discrete signal in one spatial dimension and transforms it into a set of points in one frequency dimension and the Discrete Cosine Transform (for an 8x8 block of values) takes a 64-point discrete signal‚ which can be thought of as a function of two spatial dimensions x and y‚ and turns them into 64 DCT coefficients which are in terms of the 64 unique orthogonal 2D spectrum as shown in Fig. 1.19. The DCT
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1 Experiment 15: Exploring the World of Polymers Objective: In this experiment‚ you will explore a class of chemical compounds known as polymers. You will synthesize and modify polymers‚ test their properties and use a fabrication technique to produce an object from a polymer. Introduction (See Tro‚ pp 985-987.) The importance of both natural and synthetic polymers in our lives cannot be overestimated. The desirable properties of these macromolecules‚ such as tensile strength and flexibility
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6. POLYMERS and elastomers Lecture no. 1 Objectives: Definition‚ Functionality‚ Classification of high polymers – based on origin‚ molecular structure. 6.1.1. DEFINITION: The word polymer is derived from the two greek words‚ poly and meros‚ meaning many and parts or units respectively. Polymers are macro molecules formed by linking smaller molecules repeatedly‚ called monomers. Examples: Polythene is formed by linking a large number of ethene (or ethylene) molecules together
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Chemistry 26/03/2013 The polymer Introduction What is polymer? Polymer is a huge macromolecule comprise many thousands of small molecules created through Joining together chemically. Polymers are everywhere in our life. Many industries extremely rely on polymers‚ for example‚ food court‚ tons o ’toys and dollar dungeon. Those all are stuff made out of polymers. In addition there are lots kind of polymers ‚ such as aramid‚ Carbon fiber‚ Rayon and so on. Now‚ this Essay will investigate Tons
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1. Important characteristics required for materials in Automotive Engineering Polymers have been used in the automotive industry for many decades. It is regarded as an efficient material as it is very durable and could significantly reduce production costs. However‚ as technology advances‚ new polymers are found and better alternatives are paved for the automotive industry. The vehicles we see today are very different than that of the yesteryears. This proves how far the automotive industry has
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1. GUPTA‚ A.‚ BAJAJ‚ P.‚ & PALIWAL‚ D. (1998). Journal of Applied Polymer Science‚ 70(2703). Retrieved September 26‚ 2014. 2. Sreekumar‚ T.‚ & Sen‚ K. (2001). Effect of Reaction medium on Radical Polymerization of Acrylonitrile with Vinyl acids. Poly sci.‚ 79(1640). Retrieved September 26‚ 2014. 3. (n.d.). In http://www.pslc.ws/mactest/pan.htm. Retrieved September 26‚ 2014 4. Serkov‚ A.‚ & Radishevskii‚ M. (2008). Status and Prospects For Production Of Carbon Fibres Based on Polyacrylonitrile
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yChapter 3. Polymer Processing Polymer Process Techniques Fig. 3.1. Procedure for casting sheets of polymer. Polymer Materials Page 2 Polymer Process Techniques HEMA = hydroxyethyl methacrylate EGDMA = ethylene glycol dimethacrylate Fig. 3.2. Centrifugal mold for poly(hydroxyethyl methacrylate) contact lenses Solvent casting of films Fig. 3.3. Laboratory spreading device for the solution casting of films. Polymer Materials Page 3 Polymer Process Techniques
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MANAGEMENT – 1 CHAPTER -1 INTRODUCTION TO MANAGEMENT AND ORGANIZATIONS 1 | What is management ? | (June-2011) | 2 | What is classical approach to management ? Describe the contribution of F.W.Taylor in the development of scientific management. | (Nov/Dec-2011) | 3 | Define management. | (Dec-2010) | 4 | Explain “ Management is a Science as well as an Art ”. | (Dec-2010) | 5 | “ Management is not people; it is an activity like walking‚ reading‚ swimming or running. People who
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Polymer Chemistry Classification of Polymers – Notes prepared by The most common way of classifying polymers is to separate them into three groups - thermoplastics‚ thermosets‚ and elastomers5. The thermoplastics can be divided into two types - those that are crystalline and those that are amorphous. You may click on the words in the diagram below to learn more about these classifications. Thermoplastics Molecules in a thermoplastic are held together by relatively weak intermolecular
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