2. Conceptual Modeling using the Entity-Relationship Model

Entity-Relationship Model Contents Basic concepts: entities and entity types, attributes and keys, relationships and relationship types Entity-Relationship schema (aka ER diagram) Constraints on relationship types Design choices Enhanced Entity-Relationship model features Steps in designing an ER schema Translation of an ER schema to tables

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Homework 7: Use Cases, Sequence Diagram, Activity …

e) In the Model Explorer, you can see the imported Class_DVDStore.emx. Double click on the model Class_DVDStore.emx to see its contents. Task 2: Create a Sequence Diagram in Rational Software Development Platform For this task, you will create a UML Sequence Diagram for the Use Case “Check out shopping cart”

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The circular flow model closed economy

The Circular Flow Model The circular flow model illustrates the economic relationships among all players in the economy: households, firms, the factors market, the goods-and-services market, government, and foreign trade. In the macroeconomy, spending must always equal income. The circular flow model is a diagram illustrating the flow of ...

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Translation of ER -diagram into Relational Schema

Diagram into an equivalent set of well-structured relations. 3. 4 9.49.4. 5. 6 Process of Database Design • Logical Design – Based upon the conceptual data model – Four key steps 1. Develop a logical data model for each known user interface for the application using normalization principles. 2. Combine normalized data requirements from ...

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Edge-triggered Flip-Flop, State Table, State Diagram

• State Diagram • We’ll use the following example. Sequential Circuit Description D C D C Clock X A A B B Y . Sequential Circuit Description D C D C Clock X A A B B Y input ... Mealy and Moore Model State Diagrams 00 01 10 11 0/0 1/0 0/1 1/0 0/1 1/0 1/0 0/1 0/0 1/1 00,01,10 11 00,01,10,11 Moore input state output input output

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Michael Porter’s “Five Forces” Model

above diagram. (The fifth force is the degree of rivalry that currently exists among firms already in the industry.) Here are a few additional details about Porter’s model.1 1. Barriers to Entry Economies of scale mean larger firms can produce at lower cost per unit. This tends to lower the number of firms in the industry and reduce competition.

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CUT-AND-ASSEMBLE PAPER EYE MODEL

strip, as shown in diagram. The paper and plastic should not overlap. Tape over the seam. Fold the ends of the tape over. Sketch and photo show placement of tape before the ends are folded over. Obviously, you don’t want sticky tape hanging off. 17) Bend the strip around to make a complete loop. The plastic cornea shape should

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Social Model of Health – Dahlgren & Whitehead

Social Model of Health – Dahlgren & Whitehead Dahlgren and Whitehead (1991) talk of the layers of influence on health. They describe a social ecological theory to health. They attempt to map the relationship between the individual, their environment and disease. Individuals are at the centre with a set of fixed genes.

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Adaptive Control: Introduction, Overview, and Applications

(Model Reference Adaptive Control) • Uncertain Roll dynamics: – p is roll rate, – is aileron position –are unknown damping, aileron effectiveness • Flying Qualities Model: –are desired damping, control effectiveness – is a reference input, (pilot stick, guidance command) – roll rate tracking error: • Adaptive Roll Control: p ...

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GTD Processing & Organizing

Title: GTD Processing & Organizing Created Date: 10/16/2009 5:06:37 PM