Results 171 to 180 of about 262,492 (221)
Some of the next articles are maybe not open access.
Communication Education, 2020
Dear Teachers, There is a lot about high school that is difficult, even without the threat of a global pandemic.
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Dear Teachers, There is a lot about high school that is difficult, even without the threat of a global pandemic.
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JAMA: The Journal of the American Medical Association, 1977
To the Editor.— Dr Seelenfreund replies to a letter from Dr Duke regarding tennis ball injuries to the eye (236:2287, 1976) and recommends impact-resistant glasses, among other things. I would like to report a reason to object to such glasses and to recommend use of only some physical device surrounding the bony orbit.
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To the Editor.— Dr Seelenfreund replies to a letter from Dr Duke regarding tennis ball injuries to the eye (236:2287, 1976) and recommends impact-resistant glasses, among other things. I would like to report a reason to object to such glasses and to recommend use of only some physical device surrounding the bony orbit.
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Journal of Science and Medicine in Sport, 2003
The bouncing of a tennis ball on a tennis court surface is analysed by making several simplifying assumptions about the physics of the interaction. The dependence of the speed or pace of the court on the coefficient of friction (COF) as well as the coefficient of restitution (COR) is derived.
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The bouncing of a tennis ball on a tennis court surface is analysed by making several simplifying assumptions about the physics of the interaction. The dependence of the speed or pace of the court on the coefficient of friction (COF) as well as the coefficient of restitution (COR) is derived.
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The dynamic impact characteristics of tennis balls with tennis rackets
Journal of Sports Sciences, 2003The dynamic properties of six types of tennis balls were measured using a force platform and high-speed digital video images of ball impacts on rigidly clamped tennis rackets. It was found that the coefficient of restitution reduced with velocity for impacts on a rigid surface or with a rigidly clamped tennis racket.
S J, Haake, M J, Carré, S R, Goodwill
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Bulletin for the Study of Religion, 2012
This is a substance review and engagement with Taner Edis's Science and Non ...
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This is a substance review and engagement with Taner Edis's Science and Non ...
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Review of tennis ball aerodynamics
Sports Technology, 2008The aerodynamics of a tennis ball are reviewed here with reference to several wind tunnel measurement efforts. Measurements for a wide variety of tennis balls, including the ‘oversized’ balls, are presented. Flow visualization results have shown that the separation location on a non‐spinning tennis ball occurred relatively early, near the apex, and ...
Rabindra Mehta +2 more
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ACM SIGCSE Bulletin, 2007
This paper investigates issues involved in establishing an undergraduate research program in robotics. We discuss our motivation for such a program, the challenges involved with various aspects of administration and equipment, and our plans for projects for student research.
Theresa Beaubouef, Patrick McDowell
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This paper investigates issues involved in establishing an undergraduate research program in robotics. We discuss our motivation for such a program, the challenges involved with various aspects of administration and equipment, and our plans for projects for student research.
Theresa Beaubouef, Patrick McDowell
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Painless Tennis Ball Tracking System
2018 IEEE 42nd Annual Computer Software and Applications Conference (COMPSAC), 2018Tennis ball machines help tennis players develop their game to perfect a particular stroke or area of performance. However, current commercial tennis ball machines do not provide an automatic feedback mechanism of tracking their performance, and so the collection of shot data captured during a training session is manually recorded onto paper or an ...
Wook-Sung Yoo +3 more
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Mathematics Magazine, 1989
On several occasions I have been told the paradox about a room and some tennis balls. The story goes that in the first half minute two tennis balls, #1 and ?2, are tossed into the room and #1 is thrown out. In the next quarter minute balls #3 and #4 are tossed in and #2 is tossed out. In the next 1/8 minute #5 and #6 are tossed in and #3 is tossed out.
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On several occasions I have been told the paradox about a room and some tennis balls. The story goes that in the first half minute two tennis balls, #1 and ?2, are tossed into the room and #1 is thrown out. In the next quarter minute balls #3 and #4 are tossed in and #2 is tossed out. In the next 1/8 minute #5 and #6 are tossed in and #3 is tossed out.
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Recycling polyester tennis ball containers
Journal of Chemical Education, 1989Abandoned polyester tennis ball containers that accumulate on campus tennis courts may be used in the undergraduate laboratory as dispensing or storage receptacles for a variety of items.
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