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Remote controls send a digital code word to the receiver. If the receiver determines the codeword is acceptable, then the receiver will actuate the relay, unlock the door, or open the barrier. Simple remote control systems use a fixed code word; the code word that opens the gate today will also open the gate tomorrow.
Rodent-run distraction display by superb blue wren. Redrawn from Rowley, 1962. Distraction display has been most extensively studied in birds. [4] It has been observed in many species, including passerines [15] [24] [25] [26] and non-passerines, [20] [27] [28] and has been particularly well documented in the Charadriiformes. [29] [13] [14] [18 ...
An electric mousetrap delivers a lethal dose of electricity when the rodent completes the circuit by contacting two electrodes located either at the entrance or between the entrance and the bait. The electrodes are housed in an insulated or plastic box to prevent accidental injury to humans and pets.
Clean Sweep is a maze game in which the bank president has to recover stolen money using a vacuum cleaner and return it to the deposit box while avoiding the thieves. [1] Some portions of the game feature a dark maze where the player can see only the loot.
The shadow mask is installed to the screen using metal pieces [348] or a rail or frame [349] [350] [351] that is fused to the funnel or the screen glass respectively, [256] holding the shadow mask in tension to minimize warping (if the mask is flat, used in flat-screen CRT computer monitors) and allowing for higher image brightness and contrast.
An airport surveillance radar display. A radar display is an electronic device that presents radar data to the operator. The radar system transmits pulses or continuous waves of electromagnetic radiation, a small portion of which backscatter off targets (intended or otherwise) and return to the radar system.