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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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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PLANAR DRAWINGS OF BIPARTITE GRAPHS BY ELIMINATING MINIMUM NUMBER OF EDGES MUHAMMAD OARISUL HASAN RIFAT Department of Computer Science and Engineering Chittagong University of Engineering & Technology (CUET)‚ Chittagong-4349‚ Bangladesh. PLANAR DRAWINGS OF BIPARTITE GRAPHS BY ELIMINATING MINIMUM NUMBER OF EDGES A thesis is submitted in partial fulfillment of the requirements for the degree of Science in Computer Science and Engineering. By Muhammad Oarisul Hasan Rifat (0404054) Supervised
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Network management incorporates an almost unlimited list of duties—basically‚ doing whatever it takes to keep the network running smoothing and efficiently‚ with minimal or no downtime. Network Management Network Management defined as 1. 2. 3. 4. Network management is more than just managing networks. Network management is presented from the perspectives of service management‚ operations support systems‚ and business management. The platform for a network management
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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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HOW TO DRAW BLOOD SPECIMEN How to draw a blood specimen from a patient has a few steps that have to be followed or the specimen will be contaminated. The steps to draw blood are as follows; first‚ you need to assembly all your equipment – lab request‚ vaccutainer (the needle & tube holder)‚ needle‚ tourniquet‚ & tubes; then‚ connect the vaccutainer and needle together. Using universal precautions and put gloves on and DO NOT rip off one of the fingers so you can feel better this will only put the
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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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Priscilla Avila HCIS/245 3/6/2015 Wk. 5 WORKFLOW DIAGRAM Dorothy has been experiencing constant headaches and fatigue. She decides it is time to visit her doctor‚ and she contacts her doctor’s office and schedules an appointment for the following day. 1. Dorothy calls her doctor’s office and requests a next day appointment. 2. That night the medical office computer verifies her insurance eligibility as well as for all the next day’s appointments. 3. When Dorothy arrives at her
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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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as Phase Diagrams By _________________ _________________ Material Science Lab #11 Report Introduction The purpose of this lab is to obtain the cooling curves for tin‚ lead and various alloys of these two metals. A phase diagram will be generated from these cooling curves. When a material is heated by adding energy at a constant rate‚ the temperature of the material will increase linearly with time‚ provided a phase transformation does not occur. As temperature of the sample becomes
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