applicaAons? What is enAty-‐relaAonship (ER) modelling? What are enAty types and enAty sets‚ aRributes and value sets? What are relaAonship types‚ relaAonship sets and roles? What structural constraints are used in ER modelling? What guidelines are used for ER modelling? Conceptual Design of Database
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be specified‚ as well as the data requirements. Functional requirements consist of user operations that will be applied to the database‚ including retrievals and updates. ▪ Functional requirements can be documented using diagrams such as sequence diagrams‚ data flow diagrams‚ scenarios‚ etc. Step 2: Conceptual Design ▪ Once the requirements are collected and analyzed‚ the designers go about creating the conceptual schema. ▪ Conceptual schema: concise description of data requirements of the
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IS3280 Data Management Assignment 3 Data Modeling and ER Diagrams Review ER notation sets at http://adbc.kennesaw.edu Database Design ER Notations Use how_to_draw_er_in_ppt.pptx or Gliffy to draw the models. If you use Gliffy save your drawing as an image [jpg file] and insert it into a Word document (in fact just adding your images to this document would be a good idea). Submit your word document if you used Gliffy or your powerpoint document via the D2L DropBox. 1. (2 pts) Examine the
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Chapter (11) Synchronous Motors Introduction It may be recalled that a d.c. generator can be run as a d.c. motor. In like manner‚ an alternator may operate as a motor by connecting its armature winding to a 3-phase supply. It is then called a synchronous motor. As the name implies‚ a synchronous motor runs at synchronous speed (Ns = 120f/P) i.e.‚ in synchronism with the revolving field produced by the 3-phase supply. The speed of rotation is‚ therefore‚ tied to the frequency of the source. Since
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however‚ plant and animal cells do have their differences. A plant cell is actually a large microscopic ’fully functioning ’ city‚ literally and figuratively‚ housing miniature structures known as organelles. It is fun to teach about a plant cell diagram
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Data Modeling Introduction Entity Relationship Modeling (ERM) a technique used to analyze & model the data in organizations using an Entity Relationship (E-R) diagram. Database Management System 1 Isaac M Morallo – MAITE LPU - Laguna Definitions Entity an aggregation of a number of data elements each data element is an attribute of the entity Background Introduced by Peter Chen in ‘75 now widely used You’ll find them in: Structured Systems Analysis and Design Methodology (SSADM)
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Question 1 (20 marks) Note: For multiple-choice questions‚ select the best answer. Incorrect answers will be marked as zero. No marks will be awarded for any explanations you may offer. Multiple choice (2 marks each) a. Under what condition would you be more likely to recommend a prototyping approach to systems development as opposed to a waterfall approach? 1. For a large system with multiple integration points to other organizational systems 2. For a system that is intended to solve a problem
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&RPage |1 Entrepreneurial Finance 2013 - Case Assignment Questions R&R R&R case brings up major themes that we will see over and over again in this course. This case also differs significantly from most of the other case you will read in this course as it provides a full story of an entrepreneurial venture. In most other cases in this course‚ the entrepreneur is faced with a decision/dilemma at the time of case. In these cases I will ask you to put yourself in the entrepreneur’s shoes and come
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steps involved in the design of relational database are 1) Developing the conceptual model – Drawing the ER/ EER diagram 2) Transforming the Conceptual model into a set of relations – relational schema and 3) Normalizing the relations. Once ER / EER model has been developed for the application ‚ ER/ EER diagram can be mapped into a relational model . ER/ EER diagram consists of the following components. 1) Entities (Strong ‚ Weak) with attributes 2) Attributes may be
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described in this chapter . IS3 - Competitive Strategy: Competitive Advantage through the Web Objectives Identify how technology changes are affecting industries and businesses within different industries. Example of Blockbuster‚ Netflix Examine how different companies (Zara and TJX) make different technology choices to support distinct strategies Understand the concept of the “Long Tail” Reading Text‚ pages 83-104. Movie Rental Business:
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