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The NOCSAE helmet standard was the first standard to require the use of a biofidelic headform in testing for compliance. The standard was also unique in its requirement that helmets meet a certain injury threshold criteria, referred to as the Gadd Severity Index or Severity Index (SI).
A full-face helmet after a crash Half helmets or "skid lids" meet minimum legal requirements in the United States. Helmet — Wearing a helmet reduces the rider's risk of death by 37% compared to riding without it. [62] A full-face helmet provides the most protection. Thirty-five percent of all crashes show major impact on the chin-bar area. [57]
The standard also describes how helmets must be labeled, including with such information as how to wear and clean the helmet, its size and mass, and warnings to replace the helmet after a violent impact. Helmets must also carry a type approval mark of the form "Eaa 05bbbb/c-dddd". [43] This mark encodes the following information: [44]
The requirement to wear bicycle helmets in the United States varies by jurisdiction and by age of the cyclist, for example 21 states and the District of Columbia have statewide mandatory helmet laws for children. 29 US states have no statewide law, and 13 of these states have no such laws in any lower-level jurisdiction either.
Yes, you read "Half Life" and "confirmed," but don't get excited there -- Half Life 3 is no closer to hitting stores then it was yesterday (we think at least -- silly Valve refuses to tell us ...
Over the following decade, numerous Half-Life games were canceled, including Episode Three, a version of Half-Life 3, and games developed by Junction Point Studios and Arkane Studios. In 2020, after years of speculation, Valve released Half-Life: Alyx, which was developed exclusively for virtual reality headsets.
It's the tenth anniversary of Half-Life 3 being announced by Valve, and then subsequently being gone from the public consciousness ever since.
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