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After the 1993 World Trade Center bombing, radio repeaters for New York City Fire Department communication were installed in the tower complex. Because they were unaware that several controls needed to be operated to fully activate the repeater system, fire chiefs at their command post in the lobby of the North Tower thought the repeater was not functioning and did not use it, though it did ...
According to Victor Suvorov, the Soviet reaction to losing networks operated from diplomatic missions – after the countries in which those embassies were located were overrun in the Second World War – was to emphasize "illegal" (i.e., what the US calls non-official cover) stations (i.e., residencies) for HUMINT networks. The illegal ...
A simple sorting network consisting of four wires and five connectors. In computer science, comparator networks are abstract devices built up of a fixed number of "wires", carrying values, and comparator modules that connect pairs of wires, swapping the values on the wires if they are not in a desired order.
A Bombardier E-11A at Kandahar International Airport in April 2019. E-11A 11–9001 at Dubai Airshow 2021. The Battlefield Airborne Communications Node (BACN) is a United States Air Force (USAF) airborne communications relay and gateway system carried by the unmanned EQ-4B and the manned Bombardier E-11A aircraft.
TD-2 was a microwave relay system developed by Bell Labs and used by AT&T to build a cross-country network of repeaters for telephone and television transmission. The same system was also used to build the Canadian Trans-Canada Skyway system by Bell Canada , and later, many other companies in many countries to build similar networks for both ...
A World Trade Center (also World Trade Centre or WTC) is a building or complex of buildings used for the promotion and expansion of trade and licensed to use the "World Trade Center" name by the World Trade Centers Association (WTCA). As of May 2020, the WTCA included 323 properties in 90 countries. [1]
To avoid interference within the equipment at the station, the two frequencies used need to be separated, and ideally on different 'bands'. An unattended station working in this way is a radio repeater. It re-transmits the same information that it receives. This principle is used by telecommunications satellites and terrestrial mobile radio ...
A single comparator gate. A comparator circuit is a network of wires and gates. Each comparator gate, which is a directed edge connecting two wires, takes its two inputs and outputs them in sorted order (the larger value ending up in the wire the edge is pointing to). The input to any wire can be either a variable, its negation, or a constant.