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Technology exists to bring down nations’ infrastructures without ever firing a missile Ten, Manimaran and Liu, 2010. New technology has been developed that can allow agencies to spy, snoop, monitor, and retrieve conversations had online, through email, on cell phones, or via text messaging. To meet security needs, using this technology has very real and practical advantages. At the same time, there are privacy rules and regulations that have to be considered as the Fourth Amendment of the U. S. Constitution clearly gives people the right to privacy. Nonetheless, Homeland Security requires that the nation consider the evolution of terrorism and view it not just as an external threat but also as an internal threat. In other words, terrorism is not just a…… According to the same source, the Australian market proves to be very fertile for the U. S. companies which already account for the greatest import share over 50% in 2004. Such data are outlined by the following table:CountryTotal market million of dollarsTotal imports million of dollarsImports from U.

 

 

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How Does a Home Alarm System Operate?Sensors are the most vital part of the system; they act like the eyes and ears of a home alarm system by monitoring break in points and interior areas. The typical sensors, which are usually two magnets, are generally installed on doors and windows such that one magnet is connected to the door or window and the other is connected to the door or window frame. When the door or window is opened, one magnet is removed from the surrounding area of the other and the sensor registers that the door has been opened. More advanced home alarm systems may also contain vibration sensors to detect when glass has been broken by measuring the vibrations caused by the breakage. Also, many systems use motion sensors that compute the proximity of a room’s walls by producing infrared beams and measuring the time required for them to bounce back; if a beam comes back sooner than expected, it likely bounced off of a person and the sensor registers motion. When the alarm system is installed, each sensor is registered with the control panel either through wires or wirelessly.