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2. Geofence - Wikipedia

   en.wikipedia.org/wiki/Geofence

   These virtual fences can be used to track the physical location of the device active in the particular region or the fence area. The location of the person using the device is taken as geocoding data and can be used further for advertising purposes. It is possible to monitor several geofences at once (multiple active geofences).

3. Nofence - Wikipedia

   en.wikipedia.org/wiki/Nofence

   Nofence is a Norwegian company that makes GPS collars for farm animals (cattle, sheep, and goats) that discourage them from crossing virtual fences. [1] [2] Oscar Hovde Berntsen has been working on the idea of virtual fencing, as an alternative to fixed electric fencing, since the 1990s. [3] Nofence was incorporated in 2011. [3]

4. Electric fence - Wikipedia

   en.wikipedia.org/wiki/Electric_fence

   In a virtual electric fence system, each animal has a collar with a GPS unit which is set to produce first an audible warning and then a shock as the animal approaches a programmable boundary. Pet fences to control domestic dogs have been used since 1973, and the first system for livestock control was developed by Peck's Invisible Fence Co, now ...

5. Keep your pet safe with this virtual fence and GPS collar

   www.aol.com/keep-pet-safe-virtual-fence...

   Teach your dog boundaries and set up virtual fences anywhere, regardless of mobile or GPS signals, to allow your dog more freedom while keeping them safe and sound. Halo also provides a 21-day ...

6. Secure Fence Act of 2006 - Wikipedia

   en.wikipedia.org/wiki/Secure_Fence_Act_of_2006

   (DHS had since 2007 begun "to shift its focus to erecting a 'virtual fence' along the 2,000-mile border, using sensors, cameras and other high-tech equipment to prevent illegal crossings".) DeMint's legislation was defeated in a 52–45 Senate vote in 2010. [5] By May 2011, DHS reported completing 649 miles of fencing (99.5% of the 652 miles ...

7. US cannot destroy Texas razor-wire migrant barrier, appeals ...

   www.aol.com/news/us-cannot-destroy-texas-razor...

   (Reuters) -A divided U.S. appeals court blocked the Biden administration from destroying razor-wire fencing that Texas placed along its border with Mexico to deter illegal migration. The 2-1 ...