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  2. Sharpness (cutting) - Wikipedia

    en.wikipedia.org/wiki/Sharpness_(cutting)

    Sharpened metal drop-point blade Naturally occurring sharp obsidian piece Shark tooth with a sharp, serrated edge A sewing needle comes to a sharp point. Sharpness refers to the ability of a blade, point, or cutting implement to cut through materials with minimal force, and can more specifically be defined as the capacity of a surface to initiate the cut. [1]

  3. Relativistic beaming - Wikipedia

    en.wikipedia.org/wiki/Relativistic_beaming

    Only a single jet is visible in M87. Two jets are visible in 3C 31.. In physics, relativistic beaming (also known as Doppler beaming, Doppler boosting, or the headlight effect) is the process by which relativistic effects modify the apparent luminosity of emitting matter that is moving at speeds close to the speed of light.

  4. Acutance - Wikipedia

    en.wikipedia.org/wiki/Acutance

    In digital photography, onboard camera software and image postprocessing tools such as Photoshop or GIMP offer various sharpening facilities, the most widely used of which is known as "unsharp mask" because the algorithm is derived from the eponymous analog processing method. In the example image, two light gray lines were drawn on a gray ...

  5. Vision span - Wikipedia

    en.wikipedia.org/wiki/Vision_span

    Vision span or perceptual span is a controversial concept referring to the angular span (vertically and horizontally), within which the human eye has sharp enough vision to perform an action accurately (reading or face recognition).

  6. How to Stop a Large Dog From Breaking Into Sprints on Walks - AOL

    www.aol.com/stop-large-dog-breaking-sprints...

    The beauty of using a head halter is that, by controlling the direction of the dog’s (or horse’s) head, it is possible to control the direction of their movement.

  7. Bowl game schedule today: College Football Playoff first ...

    www.aol.com/bowl-game-schedule-today-college...

    The College Football Playoff starts and two other games serve as appetizers for the main course in the bowl matchups set for Dec. 20.

  8. Reddit employees dish on the 2024 IPO and what's next ... - AOL

    www.aol.com/11-reddit-employees-look-back...

    Reddit went public in 2024 and is a more popular, profitable site than ever in its 20-year history. BI spoke to 11 Reddit employees about the new challenges and maintaining its beloved culture.

  9. C79 optical sight - Wikipedia

    en.wikipedia.org/wiki/C79_optical_sight

    A C79 Optical Sight. The C79 optical sight (SpecterOS3.4x) is a telescopic sight manufactured by Elcan. A variant, the M145 Machine Gun Optic is in use by the US military. It is 3.4×28, meaning 3.4x magnification, and a 28mm diameter objective lens. A tritium illuminated reticle provides for normal and low-light conditions sighting. [1]