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2. Engine knocking - Wikipedia

   en.wikipedia.org/wiki/Engine_knocking

   The objective of knock control strategies is to attempt to optimize the trade-off between protecting the engine from damaging knock events and maximizing the engine's output torque. Knock events are an independent random process. [8] It is impossible to design knock controllers in a deterministic platform. A single time history simulation or ...

3. Bicycle helmets in the United States - Wikipedia

   en.wikipedia.org/wiki/Bicycle_helmets_in_the...

   There are a total of 22 state laws for bicycle helmets and 201 local laws. [1] Each year about 2% of motor vehicle crash deaths are bicyclists. In a majority of bicyclist deaths, the most serious injuries are to the head. [3] Helmet use has been estimated to reduce the odds of head injury by 50%, and the odds of head, face, or neck injury by 33 ...

4. Bicycle helmet - Wikipedia

   en.wikipedia.org/wiki/Bicycle_helmet

   The bicycle helmet arm of Bell was split off in 1991 as Bell Sports Inc., having completely overtaken the motorcycle and motorsports helmet business. The first commercially successful purpose-designed bicycle helmet was the Bell Biker, a polystyrene-lined hard shell released in 1975.

5. ISO 5775 - Wikipedia

   en.wikipedia.org/wiki/ISO_5775

   ISO 5775 is an international standard for labeling the size of bicycle tires and rims.The system used was originally developed by the European Tyre and Rim Technical Organisation (ETRTO).

6. 6B47 helmet - Wikipedia

   en.wikipedia.org/wiki/6B47_helmet

   The company had previously developed and produced the 6B7-1 and 6B7-1M helmets for the Russian army. [3] [4] The 6B47 helmet provides protection from: 9-mm 57-N-181S bullets from a PM pistol from a distance of 5 meters; fragment simulators (steel balls with a diameter of 6.3 mm and a mass of 1.05 g) at a speed of no more than 630 m/s.

7. Which landmarks are affected by the wildfires in Los Angeles ...

   www.aol.com/landmarks-affected-wildfires-los...

   The Getty Villa art museum is threatened by the flames of the wind-driven Palisades Fire in Pacific Palisades, California, Jan. 7, 2025. A fast-moving brushfire in a Los Angeles suburb burned ...

8. Hat - Wikipedia

   en.wikipedia.org/wiki/Hat

   A hat is a head covering which is worn for various reasons, including protection against weather conditions, ceremonial reasons such as university graduation, religious reasons, safety, or as a fashion accessory. [1]

9. Clothing sizes - Wikipedia

   en.wikipedia.org/wiki/Clothing_sizes

   Sizing systems vary based on the country and the type of garment, ... [1] (For example: bike helmet label stating "head girth: 56–60 cm".) ... ISO 8559-2:2017, Size ...