............................………...……2 Relational database life cycle 3 Characteristics of a good database design process 6 II. The Entity-Relationship (ER) Model …………...……………….7 Basic ER concepts 7 Ternary relationships 11 III. The Unified Modeling Language (UML)………...…………….13 Class diagrams 13 Activity diagrams 19 Rules of thumb for UML 21 IV. Requirements Analysis and Conceptual Data Modeling….…..22 Requirements analysis 22 Conceptual data modeling 24
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Definition‚ Abstract and Scope Legal Feasibility Operational Feasibility Economical Feasibility Technical Feasibility Social Feasibility Objective of Project Definition of Problem System Analysis and Designing Class Diagram E-R Diagram Data Flow Diagram Context Diagram Activity Diagram DEFINITION Online food ordering‚ is an internet e-commerce services with websites that feature interactive menus‚ ratings and reviews allowing customers to place orders with local restaurants and food cooperatives
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I. SYSTEM FLOWCHART AND ER-DIAGRAM GENERATION TOOL Name of the tool: SMARTDRAW URL: This Software can be downloaded from: http://www.smartdraw.com. This is a paid software‚ but a 30-day free trial for learning can be downloaded. Requirements to use the tool: PC running Windows 95‚ 98 or NT. The latest versions of Internet Explorer or Netscape Navigator‚ and about 20MB of free space. What the tool does: Smartdraw is a perfect suite for drawing all kinds of diagrams and charts: Flowcharts‚ Organizational
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marks) Q 9. Does photosynthesis takes place in animal cells? Why plastids are necessary for photosynthesis? (2 marks) Q 10. Why plant cells cannot change their shape? (1 mark) Answers to HOTS Questions: Ans 1: The organelle shown in the above diagram is mitochondria. (1 mark) Mitochondria is the site of completion of respiration so energy releasing reactions takes place in it and energy released is stored in the form of ATP for future use. (1 mark) Ans 2: When an egg is kept in a concentrated
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is minimal also because it is Easy to explain to the user. Waterfall Model Analysis Design Implementation Testing Deployment Waterfall model Analysis. This is the first stage of the waterfall model diagram and is described as the most crucial one‚ wherein any miscommunication and misinterpretation at this stage may give rise to the software that has been developed. During this phase research is being conducted which includes brainstorming about the
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|Figure 2.1 Context Diagram | |9 |Figure 2.2 Parent Diagram | |12 |Figure 2.3 Child diagram‚ process 1 | |14 |Figure 2.4 Child diagram‚ process 2
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innerbody.com/anatomy/respiratory The Human Respiratory System – explore anatomy of the upper and lower respiratory tracts‚ from nasal passages to the lungs‚ using interactive diagrams. European Respiratory Society | ersnet.org/ Get the European Respiratory Journal‚ a discount to the ERS Congress and take part in the society. ERS Membership structure · join_ers · banner shadow. Respiratory Research respiratory-research.com/ Ramos P‚ Rubies C‚ Torres M‚ Batlle M‚ Farre R‚ Brugada J‚ Montserrat JM
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Chapter 5 Normalization of Database Tables Discussion Focus Why are some table structures considered to be bad and others good and how do you recognize the difference between good and bad structures? From an information management point of view‚ possibly the most vexing and destructive problems are created through uncontrolled data redundancies. Such redundancies produce update and delete anomalies that create data integrity problems. The loss of data integrity can destroy the usefulness
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for pick-up. They come back an average of 3 hours later. If the students choose to stay‚ their name is called as soon as the Rx is filled and they then enter the pick-up line. Assume that the system is operating at a steady state. a) The flow diagram for the entire process: Come back later 95% Start Drop-off End 5% Pick-up Cashier 100% Flow paths for students Fill Rx Flow paths for prescriptions b) Drop-off Fill Rx Pick-up Cashier 5 Rxs 40 Rxs
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In 1947‚ experiments in which small quantities of Ca2+ ions were injected directly into the cell showed that an increase in intracellular calcium led to skeletal contractions. However it was not until the early 1960s when the way calcium ions were stored in cells became clearer thanks to work from Ebashi and Lipmann. (Burgoyne and Petersen‚ 1997). Calcium signalling determines whether or not a cell is activated. It is determined by calcium-ON and calcium-OFF mechanisms. Calcium-ON is responsible
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