Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Some system analysts maintain that source doucments are unnecessary. They say that all input cab be enetered directly into the system, without wasting time in an interediate step. Do you agree?
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- Consider a neutralization system with the piping and instrumentation diagram (P & ID) in the figure below, where a certain amount of solution is added to a tank chemically treated and then sent out to the next tank. The sensors ts & as are used to sense the temperature and PH of neutralized solution, respectively. The level switches (Is1, Is2, and Is3) are activated whenever the level in the tank is at or above a given level. The neutralization process is to proceed as follows: 1. Initially, all the valves are closed, the mixer (m) and heater (h) are OFF, and the reaction tank is empty. 2. When the START button is pressed, open (V1) until (1s2) is activated. This fills the tank with the solution to be neutralized. 3. When the solution level rises above (Is2), start the mixer (m) and turn on the heater (h). When the level drops below (Is1), stop the mixer (m). 4. Whenever the PH of the solution is unbalanced, open (V2) to add neutralizer. 5. If the tank becomes full, which is indicated…arrow_forwardCreate a diagram illustrating the structure and layout of a real-time system. Can you explain the Ring algorithm in detail using a diagram?arrow_forward
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