The Entity Relationship Diagram (ERD) depicts a conceptual data model that incorporates some of the important scientific information about the real world. It adopts a natural view that the real world consists of entities and relations (Chen‚ 1976). One objective of the ERD is to create a simple‚ easy to understand and conveniently presented data model consisting of entities‚ attributes‚ relationships and cardinalities. The model serves as tool for database design‚ where the model can facilitate communication
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Entity-Relationship Diagrams (ERD) Data models are tools used in analysis to describe the data requirements and assumptions in the system from a top-down perspective. They also set the stage for the design of databases later on in the SDLC. There are three basic elements in ER models: Entities are the "things" about which we seek information. Attributes are the data we collect about the entities. Relationships provide the structure needed to draw information from multiple entities. Generally
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ALOHA 243 ALOHA AIRLINES FLIGHT 243 ACCIDENT BY LEE‚ SHU TING ALOHA 243 Cause(s) of Accident The probable cause was identified as failure of the Aloha Airlines maintenance
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Food Web Diagram Snake (D) Hawk (D) Coyote (D) Insects (C) Scorpion (C) Lizard (C) Quail (C) Mouse (C) Cactus (P) Grass (P) When you are explaining an ecosystem you have producers‚ consumers‚ and decomposers. Producers are the plants and the tress in the ecosystem that provide the energy to the ecosystem. As for the desert the producers are cactus and grass. The consumers of the ecosystem are in three different kinds‚ they are herbivores‚ carnivores‚ and omnivores. Herbivores are the consumers
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Flight or Fight Specific Purpose: Inform people about the “Fight or Flight” response and the better understand the way the body responds to certain stress. I. Introduction: Driving your parents home one night you begin to lose control of the car and crash. You’re able to escape the car unharmed‚ but notice one of your parents are stuck inside with the door jammed and the car on fire. Your heart rate begins to rise and you feel this surge of energy flow through your body. You react and rip the
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The main strategic aim and objective for the nearest period is a dynamic development of the Bank and achievement of a qualitatively new level with the standards of the Basel Committee on Banking Supervision. The development strategy of the Bank is based on the components‚ which together will ensure strengthen of the financial and economic situation of the Bank and the preservation of its credibility with its customers. Main strategic aims of Joint Stock Commercial Bank «APABANK» (Closed Joint Stock
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6 Pg 305 2. What is a data flow diagram? Why do systems analysts use data flow diagrams? Answers: A picture of the movement of data between external entities and the processes and data stores within a system. Systems analysts use DFDs to help in the analysis phase by accomplishing the following three things: 1. Requirements Determination 2. Requirements Structuring 3. Alternative Generation and Selection 3. Explain the rules for drawing good data flow diagrams. Answers: Process: A. No process
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Topology Diagram Topology Name Logical Characteristics Physical Characteristics Star Data passes through the hub to reach other devices on the network. Several devices having its own cable that connects to a central hub‚ or sometimes a switch‚ or even a Multi-station Access Unit (MAU). Data passes through the hub to reach other devices on the network. Ring Information is passed from one computer to another in either clock-wise direction or counter clock-wise direction and
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Component Diagram Notations The component diagram’s main purpose is to show the structural relationships between the components of a system. In addition‚ component diagrams are useful communication tools for various groups. In creating a component diagram‚ there are different notations that can be used to show the different relationship of each component within the system. The component diagram notation set now makes it one of the easiest UML diagrams to draw: * COMPONENT A component can
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Isabel Loeper Period 4 10/1/14 Fish Cheeks In Amy Tan’s Fish Cheeks‚ published in a 1987 issue of Seventeen Magazine‚ Tan wishes to let her audience know that it is okay to want to be different‚ but always hold on to who you were before as well. Ms. Tan drew in the audience by beginning her story with the common line about love. She made things interesting by tell us that her crush was set to join her at Christmas Eve. She went on to explain that her Chinese cultural family was an embarrassment
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