In the late 1970s data-flow diagrams (DFDs) were introduced and popularized for structured analysis and design (Gane and Sarson 1979). DFDs show the flow of data from external entities into the system‚ showed how the data moved from one process to another‚ as well as its logical storage. Figure 1 presents an example of a DFD using the Gane and Sarson notation. There are only four symbols: Squares representing external entities‚ which are sources or destinations of data. Rounded rectangles
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Fig.1. Example of Embedded System 1.2 AIM OF THE PROJECT: This project is to design a data acquisition system through PC. 1.3 SIGNIFICANCE OF THE WORK: The purpose of the project is to design a data acquisition system through PC. The main objective of this project is to design a data acquisition system through PC. PC based wireless data acquisition
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1. ------------------------------------------------- Types of searching 2.1 Binary search tree In computer science‚ a binary search tree (BST) is a node based binary tree data structure which has the following properties: * The left subtree of a node contains only nodes with keys less than the node ’s key. * The right subtree of a node contains only nodes with keys greater than the node ’s key. * Both the left and right subtrees must also be binary search trees. From the
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this tutorial I am going to explain about these questions answer below help of example in c# in visual studio 2012. 1. What is array? 2. How to declare an array in c# or How to Initializing Array? 3. How to assigning values to the array in c# ? 4. How to use array in c# with example? 5. How to find even odd numbers in c# using array? What is array? An array is a collection of values of the same data type. The variables in an array are called the array elements. Array elements
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of the industry. For example‚ software storage applications may act as substitutes for hardware storage devices. If the substitute product presents a value proposal‚ which is distinctively dissimilar to‚ the current offers in the industry‚ the threat of the substitute is said to be high. It is however said to be lower when the substitute is a poorer performance product. Customers are less likely to shift from Data Tech if substitute products are of lesser quality. Tech Data Corporation can deal with
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mmTASK 1 a) Explain the following types of data communication networks and their applications * Public switched telephone network (PSTN) * Local area networks (LANs) * Metropolitan area networks (MANs) * Wide area networks (WANs) * Packet switched data network (PSDN)‚ * Integrated services digital network (ISDN) Public switched telephone network (PSTN) Public Switched telephone network (PSTN) is the global collection of interconnects originally designed to
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The Shampoo Data Set This data set is generated by a study of Brand X shampoo. It contains two measurements of customer satisfaction (on a scale from 0 to 100) with a shampoo sample. The customer satisfaction measurements were taken from 10 men and 10 women at two separate times. The first measurement is taken before the presentation of an advertising campaign‚ and the second measurement is taken after the campaign. The last column contains a dichotomous measure of purchase intentions. Each
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Data Collection Methods OBSERVATIONS Observation is a primary method of collecting data by human‚ mechanical‚ electrical or electronics means with direct or indirect contact. As per Langley P‚ “Observations involve looking and listening very carefully. We all watch other people sometimes but we do not usually watch them in order to discover particular information about their behavior. This is what observation in social science involves.” Observation is the main source of information in the
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Digital Transmission of Digital Data Digital Transmission of Digital Data Digital Data -- can be represented electronically(by sequences of specified voltage levels) or optically Digital Transmission -- sending of information over a physical communications media in the form of digital signals. Page 2 Digital Transmission of Digital Data Computers produce binary data Standards needed to ensure both sender and receiver understands this data Codes: digital combinations
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Lecture 1 1.1 INTRODUCTION Data structure is the branch of computer science that unleashes the knowledge of how the data should be organized‚ how the flow of data should be controlled and how a data structure should be designed and implemented to reduce the complexity and increase the efficiency of the algorithm. The theory of structures not only introduces the data structures‚ but also helps to understand and use the concept of abstraction‚ analyze problems step by step and develop algorithms to
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