by Colin McIntosh, The Cambridge English Dictionary is constantly being updated and expanded to reflect the interests of our users. One area of particular interest to our users is that of English Language Teaching (ELT), and a number of ELT terms have recently been added to the dictionary.y Colin McIntosh, The Cambridge English Dictionary is constantly being updated and expanded to reflect the interests of our users. One area of particular interest to our users is that of English Language Teaching (ELT), and a number of ELT terms have recently been added to the dictionary.
A diode is a one-way âvalveâ for electric current, analogous to a check valve for those familiar with plumbing and hydraulic systems. Ideally, a diode provides unimpeded flow for current in one direction (little or no resistance), but prevents flow in the other direction (infinite resistance).
open-channel flows are rivers, tidal currents, irrigation canals, or sheets of. water running across the ground surface after a rain. 2 In both closed conduits and open channels, the shape and area of. the cross section of the flow can change along the stream; such flows are. said to be nonuniform. Flows are those that do not change in geometry or. flow characteristics from cross section to cross section are said to be. uniform.