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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Netflix was about 30% of Comcast’s traffic. Comcast also was spinning up a movie streaming service. What was suspected and Comcast eventually admitted to was slowing down the Netflix traffic on their infrastructure to unusable rates. This was a huge win for Comcast at first. The consumer sees most of their Internet traffic running normally but Netflix is slow.(Key‚ 2010) So the Comcast customer calls Netflix and complains and starts to look for other
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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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Contemporary Issue on Microsoft & Netflix Companies often buy back their own shares. There are several reasons to take such step that is to increase earnings per share‚ return on equity‚ to avoid takeover attempts‚ or to reduce the number of shareholders and so on. Some publicly held corporations purchase all their outstanding shares with the procedure of leverage buyout (LBO) and choose to go private. Recently‚ this LBO procedure is adopted by dell with the help of Microsoft contribution of 2
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costs‚ Variable costs‚ Direct costs‚ Indirect costs and Sunk costs. Fixed costs are those costs which do not vary with the output produced that include salaries for physicians and nurses‚ technicians and nurse manager and different equipment used in ER department. On the other hand the variable cost varies with the amount of output produced like heating and cooling and power and telephone bill and different types of consumables. Sunk costs are a special type of fixed costs‚ representing those that
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Power of suppliers: medium The power of content producers has been greatly increased due to the multiple outlets they have the option of choosing. More content producers are making an effort to expand vertically to decrease any reliance on the companies within this industry. However‚ the target of the industry may move to smaller content producers which allow for less expensive means of obtaining content. Power of customers: high With the advent of streaming technology‚ the consumers have begun
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1. Broad general statement 2. Introductory remarks 3. Thesis BODY 1st paragraph Topic sentence - Example/details 1 - Example/details 2 2nd paragraph Topic sentence - Example/details 1 - Example/details 2 INTRODUCTIO HOW TO WRITE AN ESSAY 1. Restate thesis 2. Sum up body 3. Final sentence C ONCLUSION x Thesis Statement Worksheet GENERAL TOPIC 1. Sports 2. Universities 3. Education 4. Festivals 5. Expensive Cars 6. Hospitals 7. Camping 8
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Reverend John Hale A scholar from Beverly‚ Reverend Hale comes to Salem on Reverend Parris ’ request to investigate supernatural causes for Betty Parris ’ suspicious illness and thus instigates the rumors of witchcraft. Hale approaches the situation precisely and intellectually‚ believing that he can define the supernatural in definitive terms. Despite his early enthusiasm for discerning the presence of witchcraft in Salem‚ Hale soon grows disillusioned with the witchcraft accusations that abound
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Problem Solutions 1. Use the following business rules to create a Crow’s Foot ERD. Write all appropriate connectivity’s and cardinalities in the ERD. 1.a. A department employs many employees‚ but each employee is employed by one department. 1.b. Some employees‚ known as “rovers‚” are not assigned to any department. 1.c. A division operates many departments‚ but each department is operated by one division. 1.d. An employee may be assigned many projects‚ and a project may have many employees
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Manar Persuasive Essay Chris Lauture Period 2‚ Ms. Vough Going through life what would you do if your child had a disease or some sort of injury during birth? If so what would you do to save it or help your infant out? Well this has happened to a little girl by the name of Manar. On February 19‚ 2005‚ 10-month-old Manar underwent a successful 13-hour surgery in Egypt. The under developed conjoined twin‚ Islam‚ was attached to Manar’s head and was facing upward. Islam
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