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deter potential intruders (e.g. warning signs, security lighting); detect intrusions, and identify, monitor and record intruders (e.g. security alarms, access control and CCTV systems); trigger appropriate incident responses (e.g. by security guards and police); delay or prevent hostile movements (e.g. door reinforcements, grilles);
The purpose of a PDS is to deter, detect and/or make difficult physical access to the communication lines carrying national security information. A specification called the National Security Telecommunications and Information Systems Security Instruction (NSTISSI) 7003 was issued in December 1996 by the Committee on National Security Systems. [1]
Modern time delay combination locks can have many functions such as multiple different codes, pre-set time lock settings (open and close times), pre-set vacation times (e.g. Christmas Day), dual code facility, and a full audit trail providing a detailed record of the lock history showing who opened the lock, when and how long it was open.
A fence-mounted perimeter intrusion detection system installed on a chain link fence. A perimeter intrusion detection system (PIDS) is a device or sensor that detects the presence of an intruder attempting to breach the physical perimeter of a property, building, or other secured area.
An electronic countermeasure (ECM) is an electrical or electronic device designed to trick or deceive radar, sonar, or other detection systems, like infrared (IR) or lasers. It may be used both offensively and defensively to deny targeting information to an enemy.
The shorting bar hook, attached to the cam, shears the shorting bar (a safety device across the detonator). After a 60-second (nominal) electronic time delay, a piston actuator in the Safe and Arm (S&A) mechanism is electrically fired, moving a slider to align the detonator with an explosive lead in the slider.
The GOP leader wants immediate action on the National Defense Authorization Act, but the top Democrat says the bill is laden with “loaded with anti-LGBTQ, anti-choice” amendments.
Initially, Buckeye was designed to provide imagery for change detection applications for detection of improvised explosive devices (IEDs). [ 2 ] [ 3 ] However, the time delay that occurred every time the geospatial information was delivered to the ground-station caused Buckeye to be more effectively used as a tool for digitally mapping urban ...