Entity Relationship Diagram The bellow diagram is what is refered to as an "Entity Relationship Diagram". Its purpose is to show the relationship between different data in the hotel management program ‚ and the actions that are performed on it. And how data from different objects relate to each other. Legend The Data Entities represent data that will need to be stored on the system‚ in general terms. The Relationships represent actions that will occur to the Data Entities‚ or Weak Entities.
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How to : Data Flow Diagrams (DFDs) Data Flow Diagrams (DFDs) Data flow diagram (DFD) is a picture of the movement of data between external entities and the processes and data stores within a system Order CUSTOMER Status Message Status Data 2.0 Shipping Confirmation In-Stock Request WAREHOUSE 1.0 Shipping Order Check Status Order Data D1 Pending Orders 3.0 Issue Status Messages Order Data Payment Invoice Manage Accounts Receivable 5.0 Accounting Data Accounts Receivable Data
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CONTENTS 6 APPENDIX............................................................................................................ GLOSSARY WRD - Weibill’s Reliability Distribution RBD - Reliability Block Diagram MSG - Maintenance Steering Group RCM - Reliability Centred Maintenance EDP - Engine Driven Pump EMDP - Electrical Motor Driven Pump FTA - Fault Tree Analysis ABSTRACT The reliability analysis of Boeing 737NG’s hydraulically actuated
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Effects of a Cyber Attack on our Nations Infrastructure and Economy Kelly O’Connor HSM 305 Professor‚ Makuch May 5‚ 2010 The damaging effects on infrastructure through cyber terrorism have a critical effect on a Nation that can collapse an economy and destroy a nation’s safety. A very important infrastructure‚ that after 9/11 has changed dramatically‚ is mass transit or trains
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Categories of Computer Crime Smith Strayer University CIS170 Wk2 Professor Masudur Chowdhury July 4‚ 2013 Explain in detail the four common categories of computer crimes and provide at least one example for each. There are many different types of computer crime and multiple ways to categorize them. I will discuss four categories in detail to shine light on how vulnerable people are‚ when we choose to use a personal or publicly used computer to transmit confidential information
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The Effects of Cyber Addiction in Academic Performance Among Selected First Year Students of San Beda College – Alabang A Research Paper Presented to The Faculty of College of Arts and Sciences Major in Psychology Pamantasan ng Lungsod ng Muntinlupa NBP Reservation‚ Poblacion‚ Muntinlupa City In Partial Fulfillment Of the Requirements for the subject PSY-312B-2 Psychological Research By: Bon‚ Lady Arriane E. Domanais‚ Alvin October 2010 CHAPTER 1 THE PROBLEM AND ITS BACKGROUND Introduction
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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. What is an Entity Relationship Diagram? An entity relationship diagram is a graphical representation of an organisation’s data storage requirements. Entity relationship diagrams are abstractions of the real world which simplify the problem to be solved while retaining its essential features. Entity relationship diagrams are used to: identify the data that must be captured‚ stored and retrieved in order to support the business activities performed by an organisation; and identify the data required
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The Iron-Carbon Diagram There are two iron-carbon equilibrium diagrams: - stable iron-graphite Fe-Gr - metastable iron-cementite Fe-Fe3C The stable condition usually takes a very long time to develop. The metastable diagram is of more interest. Fe3C iron carbide called cementite because it is hard. Following phases exist on Fe-Fe3C diagram: - liquid solution of iron and carbon (L) - ferrite ( ) – an interstitial solid solution of carbon in Fe (bcc). At room temperature ferrite is ductile but
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Drago Jereb “Cyber Bullying” “ Give me some nude pics or I’ll post the picture of you last night at the party on Facebook ”. This is an example of cyber bullying and nearly 43% of kids have been bullied online‚ 1 in 4 has had it happened to them more than once. However‚ you hold the power to change someone’s life with small actions. In other words‚ “ Change can begin with simple actions/gestures “. Nevertheless‚ everyone must be aware of how cyber bullying could affect somebody
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