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  2. Open system (systems theory) - Wikipedia

    en.wikipedia.org/wiki/Open_system_(systems_theory)

    Open systems have input and output flows, representing exchanges of matter, energy or information with its surroundings. An open system is a system that has external interactions. Such interactions can take the form of information, energy, or material transfers into or out of the system boundary, depending on the discipline which defines the ...

  3. Open systems architecture - Wikipedia

    en.wikipedia.org/wiki/Open_systems_architecture

    Systems design is a process of defining and engineering the architecture, methods, and interfaces necessary to accomplish a goal or fulfill a set of requirements. In open systems architecture, the design includes intentional provisions to make it possible to expand or modify the system at a later stage after initial operation.

  4. Classical control theory - Wikipedia

    en.wikipedia.org/wiki/Classical_control_theory

    Classical control theory uses the Laplace transform to model the systems and signals. The Laplace transform is a frequency-domain approach for continuous time signals irrespective of whether the system is stable or unstable.

  5. Feed forward (control) - Wikipedia

    en.wikipedia.org/wiki/Feed_forward_(control)

    In systems theory, an open system is a feed forward system that does not have any feedback loop to control its output. In contrast, a closed system uses on a feedback loop to control the operation of the system. In an open system, the output of the system is not fed back into the input to the system for control or operation. [citation needed]

  6. Thermodynamic system - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_system

    Properties of isolated, closed, and open thermodynamic systems in exchanging energy and matter. A thermodynamic system is a body of matter and/or radiation separate from its surroundings that can be studied using the laws of thermodynamics. Thermodynamic systems can be passive and active according to internal processes.

  7. Do you need to submit the FAFSA every semester? - AOL

    www.aol.com/finance/submit-fafsa-every-semester...

    You’ll need to reapply every year at the opening of the FAFSA for that academic year. Your state determines when you can file, so it is critical to check filing deadlines before applying.

  8. Control loop - Wikipedia

    en.wikipedia.org/wiki/Control_loop

    A control loop is the fundamental building block of control systems in general and industrial control systems in particular. It consists of the process sensor, the controller function, and the final control element (FCE) which controls the process necessary to automatically adjust the value of a measured process variable (PV) to equal the value of a desired set-point (SP).

  9. Cash-out refinance vs. home equity loans: Which is best in ...

    www.aol.com/finance/cash-out-refinance-vs-home...

    Your equity is the difference between your home's value and what you owe. For example, if your home is worth $400,000 and you owe $250,000, you have $150,000 in equity.