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DI unit. A professional passive DI box. It is passive because it does not need external power to operate. DI boxes which require a power source (batteries or phantom power) are called active DI boxes. A DI unit (direct input or direct inject) is an electronic device typically used in recording studios and in sound reinforcement systems to ...
Active vs. passive. When most people think of euthanasia, they think of a doctor directly ending someone’s life. This is known as active euthanasia. Purposely giving someone a lethal dose of a ...
An electronic component is any basic discrete electronic device or physical entity part of an electronic system used to affect electrons or their associated fields. Electronic components are mostly industrial products, available in a singular form and are not to be confused with electrical elements, which are conceptual abstractions ...
Porous pottery and coarse cloth maximize the area for evaporation. An evaporative cooler (also known as evaporative air conditioner, swamp cooler, swamp box, desert cooler and wet air cooler) is a device that cools air through the evaporation of water. Evaporative cooling differs from other air conditioning systems, which use vapor-compression ...
Passive systems rely on heat-driven convection or heat pipes to circulate the working fluid. Passive systems cost less and require low or no maintenance, but are less efficient. Overheating and freezing are major concerns. Active. Active systems use one or more pumps to circulate water and/or heating fluid.
Active immunity is more common in our bodies than passive immunity. Our individual immune systems build up active immunity instinctively as we’re exposed to new bacteria and strange pathogens ...
A passive optical network (PON) is a fiber-optic telecommunications technology for delivering broadband network access to end-customers. Its architecture implements a point-to-multipoint topology in which a single optical fiber serves multiple endpoints by using unpowered (passive) fiber-optic splitters to divide the fiber bandwidth among the ...
In electronics, a two-port network (a kind of four-terminal network or quadripole) is an electrical network (i.e. a circuit) or device with two pairs of terminals to connect to external circuits. Two terminals constitute a port if the currents applied to them satisfy the essential requirement known as the port condition: the current entering ...