Logical Data Models into Physical Data Models Susan Dash Ralph Reilly IT610-1404A-01 According to an article written by Tom Haughey the process for transforming a logical data model into a physical data model is: The business authorization to proceed is received. Business requirements are gathered and represented in a logical data model which will completely represent the business data requirements and will be non-redundant. The logical model is then transformed into a first cut physical model by applying
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Shock Waves (2009) 19:453–468 DOI 10.1007/s00193-009-0220-z ORIGINAL ARTICLE Some physical aspects of shock wave/boundary layer interactions Jean Délery · Jean-Paul Dussauge Received: 9 February 2009 / Accepted: 29 June 2009 / Published online: 26 July 2009 © Springer-Verlag 2009 Abstract When the flow past a vehicle flying at high velocity becomes supersonic‚ shock waves form‚ caused either by a change in the slope of a surface‚ a downstream obstacle or a back pressure constraining the
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There are many different layers within the Earth. The core is at center of the Earth. The Earth’s core takes up sixteen percent of Earth’s volume‚ containing thirty-three percent of its Mass ..Pressure rises steadily inside the earth because of the weight of overlying rock. Therefore ‚the Pressure at the outer boundary of the core reaches 1.37 million atmospheres‚ 3.7 million Atmospheres. The core is made mostly of iron and nickel and possibly smaller amounts of lighter elements including sulfur
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Moving on to the second part of the question looking at Storey’s ‚ “Three Component Model” and how useful it is in identifying the key characteristics of successful growth businesses. Most of the small businesses do not grow beyond their classification as a micro firm‚ very few of the small firms rise to become a medium-size enterprise‚ and even fewer rise to become large companies in the future. Storey (1994) has identified three key components in the analysis of the growth of the small firms‚ they
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"What is responsibility accounting? Is it used at your current (or former) place of employment‚ and if not‚ would it work? Why‚ or why not?" According to allbusiness.com‚ responsibility accounting is defined as a “collection‚ summarization‚ and reporting of financial information about various decision centers (responsibility centers) throughout an organization” (allbusiness.com). The article also explains that responsibility accounting helps an organization trace costs‚ revenues and profits to
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the atmosphere‚ surrounds our planet. It provides us with the air we breathe‚ and it protects us from the full blast of the sun’s radiation. Way up in the part of the atmosphere‚ called the stratosphere‚ a layer of gas filters out most of the sun’s damaging ultraviolet rays. This layer of gas is called ozone and is located about five miles to 25 miles above the surface of the Earth. (Bright‚ 1991). Only about one-millionth of our atmosphere is made up of ozone. But it has a tremendously important
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SCIENCE 6 (Semi-detailed) I. OBJECTIVES a. Identify the layers of the Earth; b. Describe each layer and its composition; and c. Label the layers of the Earth’s surface. II. LEARNING TASKS a. Topic: The Earth’s Surface b. Concepts: a. The major sections of the earth based on chemical composition are the crust‚ mantle and the core. b. The crust is the outer layer; the mantle is the middle layer and the core the inner layer. c. Values: Gratefulness d. Skills: Comparing and differentiating
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The ozone layer is a layer in Earth’s atmosphere which absorbs most of the Sun’s UV radiation. It contains relatively high concentrations of ozone (O3)‚ although it is still very small with regard to ordinary oxygen‚ and is less than ten parts per million‚ the average ozone concentration in Earth’s atmosphere being only about 0.6 parts per million. The ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30 kilometres (12 to 19 mi) above Earth‚ though the
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1. Crust: The Earth’s surface is composed mostly of water‚ basalt and granite. Oceans cover about 70% of Earth’s surface. The Earth’s thin‚ rocky crust is composed of silicon‚ aluminum‚ calcium‚ sodium and potassium. The crust is divided into continental plates which drift slowly (only a few centimeters each year) atop the less rigid mantle. The crust is thinner under the oceans; this is where new crust is formed. Continental crust is about 25-90 km thick. 2. Mantle: Under the crust is the rocky
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OZONE LAYER The Earth ’s ozone layer protects all life from the sun ’s harmful radiation‚ but human activities have damaged this shield. Less protection from ultraviolet light will‚ over time‚ lead to higher skin cancer and cataract rates and crop damage. The ozone layer is one layer of the stratosphere‚ the second layer of the Earth’s atmosphere. The stratosphere is the mass of protective gases clinging to our planet. Ozone is only a trace gas in the atmosphere only about 3 molecules for every
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