Teens tackle 21st-century challenges at robotics contest
For their first trip to a celebrated robotics contest for high school students from scores of countries, a team of Ukrainian teens had a problem.
Oct 16, 2022
0
5
For their first trip to a celebrated robotics contest for high school students from scores of countries, a team of Ukrainian teens had a problem.
Oct 16, 2022
0
5
Researchers University of California, Berkeley (UC Berkeley), Université de Montréal and Mila have recently developed a hierarchical reinforcement learning framework to improve the precision of quadrupedal robots in soccer ...
New research by the University of Bath has used motion capture technology to assess the accuracy of Video Assistant Referee (VAR) technologies in football. The study suggests that VAR is useful for preventing obvious mistakes ...
Jul 20, 2022
0
11
Her eyes squint to sharpen her focus while her mouth curves into a smile and her fingers push down on the controller, sending a baseball flying through the air. For the past year, 14-year-old Emerson Allen has patiently waited ...
May 16, 2022
0
7
Does your chihuahua crave a chinwag or the Yorkie want to yak, the greyhound needs to gossip and the corgi loves a chat?
Nov 17, 2021
1
9
The pros make it look easy, but making a movie with a drone can be anything but.
Jun 3, 2021
0
17
The next video game from publisher Electronic Arts started with a simple activity: playing catch.
Feb 18, 2021
0
5
In football, free kicks occur when the referee believes a rule has been broken. If central enough and within 30 metres from the goal, the attacking team typically attempts a direct shot on goal. However, the goalkeeper routinely ...
Dec 29, 2020
1
6
In the "Star Trek: The Next Generation" episode "The Measure of a Man," Data, an android crew member of the Enterprise, is to be dismantled for research purposes unless Captain Picard can argue that Data deserves the same ...
Oct 27, 2020
1
4
An international research team has developed "electronic skin" sensors capable of mimicking the dynamic process of human motion. This work could help severely injured people, such as soldiers, regain the ability to control ...
Sep 21, 2020
0
67
A ball is a round, usually spherical but sometimes ovoid, object with various uses. It is used in ball games, where the play of the game follows the state of the ball as it is hit, kicked or thrown by players. Balls can also be used for simpler activities, such as catch, marbles and juggling. Balls made from hard-wearing materials are used in engineering applications to provide very low friction bearings, known as ball bearings. Black powder weapons use stone and metal balls as projectiles.
Although many types of balls are today made from rubber, this form was unknown outside the Americas until after the voyages of Columbus. The Spanish were the first Europeans to see bouncing rubber balls (albeit solid and not inflated) which were employed most notably in the Mesoamerican ballgame. Balls used in various sports in other parts of the world prior to Columbus were made from other materials such as animal bladders or skins, stuffed with various materials.
As balls are one of the most familiar spherical objects to humans, the word "ball" is used to refer to, or to describe, anything spherical or near-spherical.
This text uses material from Wikipedia, licensed under CC BY-SA