Entity-Relationship (E/R) Model Dr P Sreenivasa Kumar Professor CS&E Dept I I T Madras Entity-Relationship (E/R) Model Widely used conceptual level data model • proposed by Peter P Chen in 1970s Data model to describe the database system at the requirements collection stage • high level description. • easy to understand for the enterprise managers. • rigorous enough to be used for system building. Concepts available in the model • entities and attributes of entities. • relationships between
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#2) Both Winner and Joy explore the issue of technology and control. How would you compare their two views of current technological development? Focus the comparison on a specific technology‚ such as genetically modified organisms. Technology is always in need of control. You cannot have a world that technology is in control such as the movie Terminator‚ where technology takes over. Just like human beings there is always a need for control. Both Winner and Joy explore this topic; Joy believes
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Section 2.1: Becoming Familiar with Relevant Aspects of Students’ Backgrounds Knowledge and Experiences This section talks about becoming familiar with students’ background knowledge and their experiences. Describes how to locate learner background information and experiences; explains how it can be used in planning lessons Locating learner background information and experiences is important. I could locate my students’ background information by looking at their transcripts‚ interviewing
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#1. Entity Relationship Diagram #2. a. & b. One Room can be designated only one Room Type‚ whilst a particular Room Type can be assigned to several rooms (i.e. there may be many rooms that have double beds). Therefore‚ Room has a one-to-one relationship with RoomType and RoomType has a one-to-many relationship with Room. From the table‚ it can be seen that a particular room can only be designated as belonging to one type / category‚ thus confirming that Room RoomType has
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Help in essay for minds are open only when hearts are opened ... answers.yahoo.com › ... › Education & Reference › Homework Help 2 days ago - Well‚ that is true unless you are writing an essay about facts or statistics. Suggest an essay on minds are opened only when hearts are ... 16 Aug 2013 Minds are opened only when hearts are opened essay? 15 Aug 2013 Minds are opened only when hearts are opened? 6 Aug 2013 More results from answers.yahoo.com Minds are open‚ only when Hearts are open
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the body and providing protection against unwanted organisms. 3) The circulatory system itself has three major organs included‚ but within this system‚ there is an open circulatory system and a closed circulatory system‚ also called the cardiovascular system‚ that also contain their own major organs. The cardiovascular system includes the single circulation system and the double circulation system. In the circulatory system‚ the major organs include a circulatory fluid‚ a vasculature or system
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Gas Station Project * Main * My Books * C/C++ Programs * Java Programs * Perl/PHP/Ruby Programs * Team Projects * Various Projects Program Description This was a semester-long project from my software engineering class at UNO. The goal of this project was to create a gas station management software package using the classic waterfall development lifecycle. Some of the requirements that needed to be met were: the ability to control gas pumps‚ keep track of in-store
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Free Data Flow Diagrams Tutorial DFD Tutorial Data Flow Diagrams - Introduction Data flow diagrams can be used to provide a clear representation of any business function. The technique starts with an overall picture of the business and continues by analyzing each of the functional areas of interest. This analysis can be carried out to precisely the level of detail required. The technique exploits a method called top-down expansion to conduct the analysis in a targeted way. [pic] The
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Legalizing the Sale of Human Organs Every 10 minutes‚ another person is added to the waiting list for an organ transplant. That’s 144 people every day‚ 52‚620 people every year. And every day‚ 18 people die because there aren’t enough organs to go around. That is 6‚570 people dying every year because they have waited too long for an organ transplant [All About Donation]. There has to be some way to prevent these innocent people from dying‚ and there is a way. Pretend for a moment that you’re in
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Advertising in Sweden Introduction The purpose of this report is to bring out a overview of the positive and negative aspects of two different forms of advertising in Sweden‚ which are TV commercials and adverts in newspapers. It will also examine the effectiveness of these advertising techniques and make recommendations for improvement. TV commercials Almost every channel has commercial breaks. The approach in these commercials are divided in two categories: The humorous way‚ with short sketches
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