Business
United Airlines said Wednesday it plans to add up to 28 daily flights to Florida this winter, but the airline is prepared to reverse course if the rate of coronavirus cases in the state remains high.
Aug 13, 2020
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Robotics
The Houston Astros' use of cameras to steal signs and conceivably cheat to win the World Series has driven many recent conversations about the place and meaning of technology in sports. The Major League Baseball season is ...
Jun 1, 2020
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Robotics
A team of researchers affiliated with multiple institutions in China and one in Korea has developed a micro-robot system that regenerated knee cartilage in rabbits. In their paper published in the journal Science Advances, ...
Engineering
A Tactile Internet is potentially the next phase of the Internet of Things, in which humans can touch and interact with remote or virtual objects while experiencing realistic haptic feedback.
Jan 23, 2020
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141
Consumer & Gadgets
Samsung at CES showed its ball-shaped rolling robot that follows you around, beeps and performs tasks as your personal assistant. The company posted a video showing just how Ballie would help out in your home.
Engineering
A team of researchers from China and the U.S. has built a smart, self-powered ping-pong table. In their paper published in the journal Nature Communications, the group describes how the table was built and how it powers itself.
Robotics
50 years ago, the first industrial robot arm called Unimate assembled a simple breakfast of toast, coffee, and champagne. While it might have looked like a seamless feat, every movement and placement was coded with careful ...
Mar 15, 2019
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324
Computer Sciences
Basketball players need lots of practice before they master the dribble, and it turns out that's true for computer-animated players as well. By using deep reinforcement learning, players in video basketball games can glean ...
Aug 7, 2018
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34
Hi Tech & Innovation
A team of researchers at MIT has created a hand-worn device that they claim can influence a person's micro-dreams during hypnagogia. The group has announced their device by posting a page describing it on an MIT website. ...
Energy & Green Tech
Lithium metal-based batteries have the potential to turn the battery industry upside down. With the theoretically ultra-high capacity of lithium metal used by itself, this new type of battery could power everything from personal ...
Jan 18, 2018
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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
