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  2. Geofence - Wikipedia

    en.wikipedia.org/wiki/Geofence

    A geofence can be dynamically generated (as in a radius around a point location) or match a predefined set of boundaries (such as school zones or neighborhood boundaries). The use of a geofence is called geofencing, and one example of use involves a location-aware device of a location-based service (LBS) user entering or exiting a geofence ...

  3. Phos-Chek - Wikipedia

    en.wikipedia.org/wiki/Phos-Chek

    Concerns have been raised that Phos-Chek harms fish and aquatic life; and that it causes long-term effects on soils, insects, and microbiology. [13] A group based in Oregon called Forest Service Employees for Environmental Ethics sued the U.S. Forest Service, claiming the service violated the Clean Water Act by spraying Phos-Chek without assessing the product's harmful effects on waterways.

  4. Perimeter security - Wikipedia

    en.wikipedia.org/wiki/Perimeter_security

    Most perimeter protection solutions in the past have been large-scale, stationary solutions. This causes a great challenge for today's mobile industry and military. With smaller, rapid deployment forces the norm for most of today's military engagements, large walls, high fences, and other permanent solutions aren’t always effective.

  5. Amazon Lab126 - Wikipedia

    en.wikipedia.org/wiki/Amazon_Lab126

    Amazon Lab126 [4] (sometimes known as Lab126) is an American research and development and computer hardware company owned by Amazon.com. [5] It was founded in 2004 by Gregg Zehr, [ 6 ] previously Vice President of Hardware Engineering at Palm , and is based in Sunnyvale, California . [ 7 ]

  6. Perimeter fence - Wikipedia

    en.wikipedia.org/wiki/Perimeter_fence

    An example of detector applied on a perimeter fence is the mems accelerometer. The advantages of having a perimeter intrusion detection system are various, and of great importance, for example we obtain a remarkable capacity to analyse the information produced by each sensor, without the need to increase the resources at the centre.

  7. Wave packet - Wikipedia

    en.wikipedia.org/wiki/Wave_packet

    From the basic one-dimensional plane-wave solutions, a general form of a wave packet can be expressed as (,) = (()). where the amplitude A(k), containing the coefficients of the wave superposition, follows from taking the inverse Fourier transform of a "sufficiently nice" initial wave u(x, t) evaluated at t = 0: = (,) . and / comes from Fourier ...

  8. As California fire season begins, debate over wildfire ... - AOL

    www.aol.com/news/california-fire-season-begins...

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  9. Perimeter intrusion detection - Wikipedia

    en.wikipedia.org/wiki/Perimeter_intrusion_detection

    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.