1. Customer places an order. 2. Order contains order details. 3. An Order detail has a product. 4. Bank completes the payment. The main assumptions in a Credit Card Sale System are: 1. The Customer and the Retailer have an account in the same bank. 2. Instead of the grid through which all the banks are connected the payment is processed by the bank for simplicity. E-R Diagram Tables and Primary Keys Normalization Forms The three normalization forms are 1
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Draw ENTITY RELATIONSHIP DIAGRAM (ERD) for the following requirement: 1. Students take courses in a college 2. Customers have accounts in a bank 3. People own vehicles 4. Employees manage projects 5. Machines are made up of parts 6. A college offers several courses. Attributes of the course include course code‚ name and credits. Each course may have zero or more subjects 7. Hotel (HotelNo‚ Name‚ Add‚ TelNo) Room (RoomNo‚ HotelNo‚ Type‚ Price) Booking (HotelNo
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by autotrophs and heterotrophs to obtain free energy for cellular processes. In other words‚ how and in what form does each capture and store that energy? 2. Explain how photosynthesis differs in eukaryotic organisms (with organelles such as chloroplasts) and in prokaryotic organisms (single-celled‚ no organelles). 3. How does a metabolic pathway such as photosynthesis suggest common ancestry? 4. Describe the basic structure and function of a chloroplast. 5. Describe the benefit of
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Company Background 1. History of the Company 2. Company Products / Service and Clients 3. Organizational Charts / Divisions and Departments 4. Locale of the Study (with Map) B. Overview of the Current System C. Context Diagram of the Current System D. Data Flow Diagram of the Current System E. User Overview of the Current System F. Analysis of the Current System G. Operational Definition of Terms CHAPTER 2 FEASIBILITY STUDY A. Organizational and Cultural Feasibility B. Technological
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Elijah A. Ruffin Research Paper Since the creation of Genetically Modified Foods in the 1950s‚ there has been increasing controversy over scientific‚ environmental‚ social‚ and the ethical issues surrounding them. The history of Genetically Modified foods shows that the initial purpose was to extend shelf life‚ improve flavor‚ and increase resiliency against degradation and rotting. According to Margaret McLean‚ a profound researcher of GMO’s‚ the first products to be genetically modified were
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A. Conceptual Framework IPO DIAGRAM: INPUT PROCESS OUTPUT The conceptual framework of this study is composed of different segments‚ which are to be discussed in the following section. 1.1 Population The intersection of Commonwealth Avenue: Don Antonio-Ever Gotesco is composed of around 300‚000 (San tayo pwede kumuha ng estimate?) people living within the 300-m radius. It is significant to determine the amount of commuters within
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Review Entity-Relationship Diagrams and the Relational Model CS 186‚ Fall 2007‚ Lecture 2 R & G‚ Chaps. 2&3 A relationship‚ I think‚ is like a shark‚ you know? It has to constantly move forward or it dies. And I think what we got on our hands is a dead shark. Woody Allen (from Annie Hall‚ 1979) • Why use a DBMS? OS provides RAM and disk Review • Why use a DBMS? OS provides RAM and disk – Concurrency – Recovery – Abstraction‚ Data Independence – Query Languages – Efficiency (for most tasks)
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Acid Rain Acid rain‚ or acid desposition‚ is simply common rainfall that has been polluted sufficiently by atmospheric pollution. Acid rain contains two types of acids: nitric and sulfuric. These chemicals‚ or precursors‚ are emited by natural sources such as volcanoes and decaying vegetation. Man-made sources are also primary causes for emissions of sulfur dioxide and nitrogen oxides that come from fossil fuel combustion. The most common emiters of these fossil fuels are power plants‚ factories
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PART 1 MODULE 3 VENN DIAGRAMS AND SURVEY PROBLEMS EXAMPLE 1.3.1 A survey of 64 informed voters revealed the following information: 45 believe that Elvis is still alive 49 believe that they have been abducted by space aliens 42 believe both of these things 1. How many believe neither of these things? 2. How many believe Elvis is still alive but don’t believe that they have been abducted by space aliens? SOLUTION TO EXAMPLE 1.3.1 When we first read the data in this example‚ it may seem as if the numbers
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television and even millions of kilometres for space communications. It has certain applications in fixed‚ mobile‚ and portable devices‚ including two-way radios‚ cellular 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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