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This constraint engine could also be used for specifically designing upper limits as to how many total sessions to allow to be created given the constraint of professor time and availability. In addition, the Web-based college or university registration system also needs to have a front-end interface or graphical user interface that is intuitive enough for the first-year or freshman students to navigate yet robust enough in functionality to allow students who are pursuing master's and PhD level studies to also schedule independent study and consultation times with their professors. There must be a degree of flexibility in the system design to specifically allow for this type of role-based access and use, from the entry-level freshman to the advanced master's and PhD-level students. To ensure the system is used correctly and there is sufficient security, it is also critically important for the design to allow for role-based and authentication-based use over the career of a student at the university. Role-based refers to the courses they will be required to take given their major and minor emphasis, and what semester or trimester they are attending the university, taking into account the course availability. There will also need to be second- and third-order levels of security and role-based validation including a valid student ID and also for upper-division courses in their major, potential prior approval...
Finally this system would need to be engineered to provide for specific threaded programming for each student login and use. The use of a multi-threaded operating system such as Linux or on the Web, AJAX with security extensions would allow for these sessions to be kept completely separate from each other and confidential.
References
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Ioana Manolescu, Marco Brambilla, Stefano Ceri, Sara Comai, & Piero Fraternali. (2005). Model-driven design and deployment of service-enabled web applications. ACM Transactions on Internet Technology, 5(3), 439.
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