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2. Control-flow diagram - Wikipedia

   en.wikipedia.org/wiki/Control-flow_diagram

   A control-flow diagram (CFD) is a diagram to describe the control flow of a business process, process or review. Control-flow diagrams were developed in the 1950s, and are widely used in multiple engineering disciplines. They are one of the classic business process modeling methodologies, along with flow charts, drakon-charts, data flow ...

3. Electric current - Wikipedia

   en.wikipedia.org/wiki/Electric_current

   A flow of positive charges gives the same electric current, and has the same effect in a circuit, as an equal flow of negative charges in the opposite direction. Since current can be the flow of either positive or negative charges, or both, a convention is needed for the direction of current that is independent of the type of charge carriers.

4. Photosynthesis - Wikipedia

   en.wikipedia.org/wiki/Photosynthesis

   The chlorophyll molecule ultimately regains the electron it lost when a water molecule is split in a process called photolysis, which releases oxygen. The overall equation for the light-dependent reactions under the conditions of non-cyclic electron flow in green plants is: [28]

5. Petroleum refining processes - Wikipedia

   en.wikipedia.org/wiki/Petroleum_refining_processes

   The image below is a schematic flow diagram of a typical petroleum refinery that depicts the various refining processes and the flow of intermediate product streams that occurs between the inlet crude oil feedstock and the final end-products. The diagram depicts only one of the literally hundreds of different oil refinery configurations.

6. Signal-flow graph - Wikipedia

   en.wikipedia.org/wiki/Signal-flow_graph

   A signal-flow graph or signal-flowgraph (SFG), invented by Claude Shannon, [1] but often called a Mason graph after Samuel Jefferson Mason who coined the term, [2] is a specialized flow graph, a directed graph in which nodes represent system variables, and branches (edges, arcs, or arrows) represent functional connections between pairs of nodes.

7. Information flow diagram - Wikipedia

   en.wikipedia.org/wiki/Information_flow_diagram

   Construction of an information flow diagram requires the knowledge of different information sources and the connections between them. The sources and targets of information flow are one of the following: actor, use case, node, artefact, class, component, port, property, interface, package, activity node, activity partition, or instance specification.