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Vigilance decrement is defined as "deterioration in the ability to remain vigilant for critical signals with time, as indicated by a decline in the rate of the correct detection of signals". [4] Vigilance decrement is most commonly associated with monitoring to detect a weak target signal.
The system was created by Homeland Security Presidential Directive 3 on March 11, 2002, in response to the September 11 attacks.It was meant to provide a "comprehensive and effective means to disseminate information regarding the risk of terrorist acts to federal, state, and local authorities and to the American people."
Once sent, the Emergency Alert System plays the nation's alert tone and a description of the child, possible suspect and vehicle used is shared. The text is shown on digital transportation highway ...
National Counter-Terrorism Alert Level. Certain - terrorist attack is imminent or has occurred; Expected- terrorist attack is highly likely; Probable - terrorist attack is likely; Possible - terrorist attack could occur; Low - terrorist attack is not expected; Administered by the Federal Attorney-General's Department.
The National Public Warning System, also known as the Primary Entry Point (PEP) stations, is a network of 77 radio stations that are, in coordination with FEMA, used to originate emergency alert and warning information to the public before, during, and after incidents and disasters.
The Homeland Security Advisory System was created in response to the 9/11 attacks by the George W. Bush administration.After its announcement, Peter T. King, a Republican Representative from New York, said that the color-based assessments were useful at the time of their creation but that a more specific system was now needed. [4]
The Common Alerting Protocol (CAP) is an XML-based data format for exchanging public warnings and emergencies between alerting technologies. CAP allows a warning message to be consistently disseminated simultaneously over many warning systems to many applications, such as Google Public Alerts and Cell Broadcast.
An example of a Wireless Emergency Alert on an Android smartphone, indicating a Tornado Warning in the covered area. Wireless Emergency Alerts (WEA), formerly known as the Commercial Mobile Alert System (CMAS) and, prior to that, as the Personal Localized Alerting Network (PLAN), [1] is an alerting network in the United States designed to disseminate emergency alerts to cell phones using Cell ...