Chapter 4 The Enhanced E-R Model and Business Rules Chapter Objectives The purpose of this chapter is to present some important extensions to the E-R model (described in Chapter 3) that are useful in capturing additional business meaning. In particular we describe two types of extensions to the E-R model. The enhanced entity-relationship (EER) model includes constructs for supertype/subtype relationships. The inclusion of new notation for business rules allows the designer to capture
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When in February 1976 Martell received the letter from McElroy‚ he was not surprised a lot. All the problems that had occurred over time‚ and punctually postponed‚ now appeared. When Martell was elected as the new president of PC&D‚ he brought his “entrepreneurial spirit” that quickly spread across the organization. This had a positive effect on the company‚ especially in terms of profitable growth. In fact it led to the creation of 11 entrepreuneral subsidiary‚ of these 4 had successfully been
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Vitamin D HW205 Kaplan University Vitamin D is actually not classified as a vitamin. It is considered a prohormone and its active form functions as a hormone. In the earlier years Vitamin D was always associated directly with milk. As the progression of research has shown‚ Vitamin D is prominent in many foods. The most vitamin D rich foods are milk‚ margarine‚ fortified cereals‚ fortified orange juice‚ canned tuna and other fish such as mackerel and salmon‚ and some whole
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________. A. B. C. D. E. 2. The decay of to occurs through the emission of a(n) ________. A. alpha particle B. beta particle C. neutron D. proton E. positron 3. Radionuclides which have too low of a neutron/proton ratio generally decay through ________. A. beta emission B. electron capture or positron emission C. gamma ray emission D. alpha emission E. neutron absorption 4. How many neutrons does have? A. 21 B. 23 C. 25 D. 46 E. 67 5. Identify the
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Issue 84 Informing customers about products and services Requiring businesses to provide complete product information to customers promote various consumer interests but at the same time imposes burdens on businesses‚ government and taxpayers. On balance ‚ the burdens outweigh the benefits ‚ at least in most cases. A threshold problem with disclosure requirements is that of determining what constitutes “complete” information. Admittedly‚ legislating disclosure requirements clarifies the duties
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Charles Richard Drew was a very famous and innvative surgeon and educator. He helped to create two of the larges blood banks in the world. not only did he create two of the largest bood banks‚ he developed a technique of plasma storage. This development is so significant because he helped to save the lives of hundreds of sodiers in World War Ii. Charles Drew was born on June 3‚ 1904 in Washington‚ D.C. He was the eldest of five children born to Thomas‚ carpet layer‚ and Nora Burrell Drew‚ who
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CURRICULUM VITAE OF RONALD MAHUMANI 1. Personal Information Full Name : Ronald Mahumani Date of Birth : 27 January 1985 Identity Number : 8501275649084 Nationality : South African Race : African Gender : Male Marital Status : Single Driving License : Code 10 General Health : Good Contact : 072 6129870 Residential Address : 509 Centre Place‚ 267 Helen Joseph Street‚ Pretoria‚ 0002 Languages : English‚ Afrikaans‚ N. Sotho‚ Tsonga‚ and isiZulu Criminal Offences
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As one might know might know Exxon Mobil landed itself at the number one spot of the fortune 500 list in 2012 (Fortune 500‚ 2012). Over the last one hundred twenty-five years Exxon has grown from you average producer of kerosene to‚ debatably‚ the top producer of petroleum products in the world. A lot can be said for such a great accomplishment in today’s society. One of the greatest attributes to an organization of this magnitude has is a strong‚ determined‚ and goal oriented Chief Executive officer;
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1. Executive Summary Marriott International hotels has thousands of locations worldwide and seems to continue to expand their business. In the previous tough economic times‚ despite small losses‚ they seem to stay strong and find new ways to keep their business growing. They also seek new ways to improve the business and earn profit as well which makes this seem like a viable company to invest in. 2. Internal Analysis 2.1. Human Resources 2.1.1. Planning For Human Resources‚ the planning
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greater amplitude than either of the component waves. A radio transmitter sends out two signals‚ one for voice communication and another for data. Suppose the equation of the voice wave is v = 10 sin(2t 30˚) and the equation of the data wave is d = 10 cos(2t + 60˚). a. Draw a graph of the waves with the use of a program or software when they are combined. b. Analyze and explain what type of interference results from the combination of the two waves. 2 Task 2: Aviation Mach number
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