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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#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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Experiment #1: Determination of the Solid-Liquid Phase Diagram for Napthalene-Biphenyl Using Thermal Analysis Objective To apply thermal analysis to the two-component system‚ naphthalene-biphenyl at atmospheric temperature. The analysis will be represented by a solid-liquid phase diagram (freezing point diagram). Theoretical Principles Phase Equilibria and the Gibbs Phase Rule This experiment is conducted in order to study a condensed system (solid-liquid) at constant temperature (atmospheric
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4.3 DATA FLOW DIAGRAM A data flow diagram is a graphical technique that depicts information flow and transforms that are applied as data move from input to output. The DFD is also known as Data Flow Graph or Bubble Chart. The DFD is used to represent increasing information flow and functional details. Also DFD can be stated as the starting point of the design phase that functionally decomposes the requirements specifications down to the lowest level of detail. A Level 0 also called a fundamental
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In 1993 Jeffery Keedy made the following statement; "The idea of borrowing in Graphic design is so pervasive that it’s often done unconsciously. What is needed is awareness of what crossing cultural/historical barriers actually means‚ as well as an understanding of the importance of context" It is a fair comment to make that borrowing in graphic design‚ as well as in almost all other areas of design is ubiquitous. Whether this is a good or bad thing could be argued at length‚ but generally
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witchcraft when he wonders aloud about the strange books she reads at night. Corey is a frequent plaintiff in court‚ having brought dozens of lawsuits‚ and he stands with Proctor in challenging the girls ’ accusations‚ believing that Thomas Putnam is using charges of witchcraft to secure land. When Corey refuses to name the person who heard Putnam declare these intentions‚ Corey is charged with contempt of court and dies when the court orders him to be weighted with stones to coerce him to admit the
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Final Exam Questions MCM 252 Graphic Design SUMMER 2013 Q1. Name two types of PRINT and their uses. Describe each one in detail: 1- Posters: A poster is any piece of printed-paper designed to be attached to a wall or vertical surface. Typically posters include both textual and graphic elements. Posters are designed to be both eye-catching and informative. Posters may be used for many purposes. They are a frequent tool of advertisers (particularly of events‚ musicians
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A. Philip Randolph was a trailblazing leader‚ organizer and social activist who championed equitable labor rights for African-American communities during the 20th century. A. Philip Randolph was born Asa Philip Randolph on April 15‚ 1889‚ in Crescent City‚ Florida. He was the second son of James Randolph‚ a Methodist minister‚ and his wife‚ Elizabeth‚ both of whom were staunch supporters of equal rights for African Americans and general human rights. In 1891‚ the Randolph family moved to Jacksonville
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Acrylic Makeup Organizer and Where to buy it Running late? Just need that eyeliner but can’t find? Are you a person who is always in a hurry and look for your favorite makeup items only to be frustrated when you can’t find? Then you should opt for makeup organizer that is an affordable and practical way to go from clutter to organization. Makeup organizers are special beauty boxes that help in holding your essential makeup equipments in an organized way. An acrylic makeup organizer is the perfect
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G. NARAYANAMMA INSTITUTE OF TECHNOLOGY & SCIENCE (For Women) DEPARTMENT OF IT Principles of Programming Language –Operator precedence rules? –Operator associativity rules? –Order of operand evaluation? –Operand evaluation side effects? –Operator overloading? –Type mixing in expressions? Arithmetic Expressions: Operators A unary operator has one operand A binary operator has two operands A ternary operator has three operands Arithmetic Expressions: Operator Precedence Rules The operator precedence
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