Layers of the Atmosphere The envelope of gas surrounding the Earth changes from the ground up. Five distinct layers have been identified using... • thermal characteristics (temperature changes)‚ • chemical composition‚ • movement‚ and • density. Each of the layers are bounded by "pauses" where the greatest changes in thermal characteristics‚ chemical composition‚ movement‚ and density occur. Troposphere The troposphere begins at the Earth’s surface and extends from 4 to 12 miles (6 to 20
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unshielded twisted-pair (UTP) - Copper wiring used in small-to-large networks to connect host devices to hubs and switches. Core - the central part of an optical fiber that provides the transmission region for an optical signal. Cladding - A layer of optical glass surrounding the light-carrying core of an optical fiber. Radio waves - An electromagnetic wave used for long distance communication. Wireless WAN - A wireless wide area network‚ is a form of wireless network its a larger version
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Table of Contents Part 1: General review of data link layer 2 a) Explain the working principles of the data link layer. 2 b) Is controlled access better than contention for media access control? Discuss. 2 c) Why is error detection important in this layer? What is being measured? 3 d) Identify three significant noises that can cause errors in data communication digital circuits. Briefly explain. 3 Part 2: General review of error correction 4 a) Why is cyclical redundancy
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the bio-physical model of medical practice has been challenged by the bio-psycho-social approach. World Health Organization defines health as “a state of complete physical‚ mental and social well being and not merely the absence of disease or infirmity”. The definition may sound “utopian‚ inflexible‚ unrealistic and unlikely‚” but it demands borrowing inputs from multiple non-medical domains. Medicine is a science but its practice is an art. Art is an outlet of expression. It is physical manifestation
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Ozone Layer Depletion [ Language & Communication Skills ] Contents Abstract | 1 | Introduction | 2 | Findings: Factor of ozone depletion | 3 | Effect of ozone depletion | 4 | Solution of ozone layer | 5-6 | Conclusion | 7 | Recommendation | 8 | References | 9-10 | Appendices | 11-13 | Bibliography | 14 | Abstract Ozone is concentrated in the ozone layer ‚ which is located in the stratosphere. It plays an important role to protect humans and
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WHAT IS AN ADJOINT MODEL? The article begins by going into the history of the use of adjoints in meteorology. Adjoints are considered by many meteorologists to be powerful modeling tools. Sensitivities are a concern of many research meteorologists‚ and questions surrounding them require estimations of how synoptic features will change (in the modeling) if perturbations are made. In sensitivity analysis‚ many methods are at work‚ but the basic one (as stated above) is that people look back
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WHAT IS THE DUPONT MODEL? DESCRIPTION The DuPont Model is a technique that can be used to analyze the profitability of a company using traditional performance management tools. To enable this‚ the DuPont model integrates elements of the Income Statement with those of the Balance Sheet. ORIGIN OF THE DUPONT MODEL. HISTORY The DuPont model of financial analysis was made by F. Donaldson Brown‚ an Electrical Engineer who joined the giant chemical company’s Treasury department in 1914
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Multi-Tier Architecture The Three Tier Model Business applications today all access data as part of their core functionality. As relational database servers gained in popularity 20 years ago‚ the industry moved from a one tier (mainframe) model to a client server model where we had a client performing the presentation logic and most of the business logic and the server with the data storage and some business logic in the form of stored queries. By the early 1990s this model broke down due to high maintenance
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Fama-French Three-Factor Model Capital Marketing Shijie Wu Fama-French Three-Factor Asset Pricing Model I. Definition of Fama-French Three-Factor Model A. Definition In asset pricing and portfolio management‚ the Fama-French three-factor model is a theory that improvement of the capital asset pricing model. The model is proposed based on the empirical study of historical returns as a result of U.S. stock market. The purpose is to explain the average returns of the stock
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2‚ No.1‚ February 2011 ISSN: 2010-0264 Ozone Layer Depletion and Its Effects: A Review Sivasakthivel.T and K.K.Siva Kumar Reddy Abstract - There are many situations where human activities have significant effects on the environment. Ozone layer damage is one of them. The objective of this paper is to review the origin‚ causes‚ mechanisms and bio effects of ozone layer depletion as well as the protective measures of this vanishing layer. The chlorofluorocarbon and the halons are potent
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