In comparison with e-learning content, e-learning processes evolve over time, and are …
In comparison with e-learning content, e-learning processes evolve over time, and are essentially performed in such as way that they structure human activity using designs such as schedules, rules and protocols. Common e-learning activities include participating in online discussion, chat and other forms of conferencing (Salmon 2000), accessing specific e-learning content, taking tests and assessments, working through short exercises to stimulate thinking (Salmon 2002), or completing web forms such as those used in e-portfolios or course evaluation. While some elearning activities are direct analogues of offline activities, the majority (such as asynchronous communication) are significantly transformed by being in the online domain, and others, (such as interactive simulations and animation) are difficult to provide in any context other than an online environment.
Commercial simulation software for solar plants is readily available, but source codes …
Commercial simulation software for solar plants is readily available, but source codes are not. Many articles in the open literature give governing equations and algorithms for solar plant simulations, but adopters must program them themselves. This paper presents an open-source, ready-to-run, model of a parabolic trough solar field with a user-friendly interface in the Simulink® environment. The intention is to provide a foundational tool for the solar thermal research community, similar to the Tennessee Eastman Challenge Problem employed for chemical processes. The flow rate of the heat transfer fluid (HTF) and the angle of incidence are the manipulated variables of the model. The size of the solar field may be altered. Both open- and closed-loop responses to disturbances may be investigated. The source code of the model is freely available at the Open Educational Resource Commons, which investigators can utilize and extend.
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