Abstract: According to the theory of ring raceway control and Hertz contact, the quasi-static model of angular contact ball bearing under high speed is established. In this paper, an improved ...

Abstract: As ultra-precision index of bearings, the value of non-repetitive run-out (NRRO) directly influences the rotation precision of rotating mechanism of complex mechanical system. However, the ...

Adidas has been the official match ball provider for the Champions League since 2001, when the German sportswear company ...

Similar to regular instant replay, the goal of the ABS challenge system is to correct the most egregious missed calls, though we will inevitably see some ticky-tack replays as well. More than a few ...

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DUNEDIN, Fla. (AP) — Kevin Gausman recorded 709 called strikes on pitches outside the strike zone over the past decade, a total that ranks third highest in Major League Baseball. “I would have thought ...

Rajasthan United FC held Diamond Harbour FC to a 1-1 draw in Indian Football League (IFL) 2025-26 at the Vidhyadhar Nagar Stadium in Jaipur on Thursday. Jonathan Feranandes gave the home side the lead ...

Two rule changes made by the NCAA are giving Colorado State volleyball some things to consider. The first rule change was the elimination of the double contact call. This means that a player is ...

Expected Batting Average (xBA) is a Statcast metric that measures the likelihood that a batted ball will become a hit. Each batted ball is assigned an xBA based on how often comparable balls -- in ...

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