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2. Notch (engineering) - Wikipedia

   en.wikipedia.org/wiki/Notch_(engineering)

   Charpy test sample with a notch. In mechanical engineering and materials science, a notch refers to a V-shaped, U-shaped, or semi-circular defect deliberately introduced into a planar material. In structural components, a notch causes a stress concentration which can result in the initiation and growth of fatigue cracks.

3. Weir - Wikipedia

   en.wikipedia.org/wiki/Weir

   A notch weir is any weir where the physical barrier is significantly higher than the water level except for a specific notch (often V-shaped) cut into the panel. At times of normal flow all the water must pass through the notch, simplifying flow volume calculations, and at times of flood the water level can rise and submerge the weir without ...

4. Barbed wire - Wikipedia

   en.wikipedia.org/wiki/Barbed_wire

   The wire is aligned under tension between heavy, braced, fence posts (strainer posts) and then held at the correct height by being attached to wooden or steel fence posts, and/or with battens in between. The gaps between posts vary depending on type and terrain.

5. Perimeter fence - Wikipedia

   en.wikipedia.org/wiki/Perimeter_fence

   In high-security applications, sensors may be attached to the fence that generate alarms when they detect someone cutting, climbing, or lifting the fence fabric. The goal of perimeter fence. The goal of perimeter fence is to stop or prevent the incident and reduce the level of risk. Doing so discourages the perpetrator from committing a harmful ...

6. Silt fence - Wikipedia

   en.wikipedia.org/wiki/Silt_fence

   Silt fence installed on a construction site. Silt fences are often installed as perimeter controls. They are typically used in combination with sediment basins and sediment traps, as well as with erosion controls, which are designed to retain sediment in place where soil is being disturbed by construction processes (i.e., land grading and other earthworks).

7. NFL playoff picture: Projected AFC, NFC bracket wild card ...

   www.aol.com/nfl-playoff-picture-projected-afc...

   The Ravens won 30-23 in a battle between the Harbaugh brothers. Jim's Chargers could jump to the No. 5 seed with a win over Las Vegas and a Pittsburgh loss to Cincinnati. In that scenario, they'd ...

8. No more having to pick between your hat or sunglasses, you ...

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9. Stoplogs - Wikipedia

   en.wikipedia.org/wiki/Stoplogs

   Typically small amounts of water will leak between individual logs. Stoplogs are typically used in structures where the removal, installation, and replacement of the logs is expected infrequently. When larger flows of water are passing through a stoplog gate, it can be difficult to remove or place individuals logs.