In my kids’ tennis class they are getting good enough to have actual rallies. The coach feeds them a ball and has them play out points. Each rally is worth 1 point and they play to 10. To stop them from trying to hit winners on the first shot and in attempt to get them to play longer rallies, the coaches tried out an interesting rule. “The ball must cross the net four times before the point begins. If your shot goes out before that, its 2 points for the other side.”
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May 9, 2013 at 2:57 pm
Jonathan Weinstein
This rule is a little vague. What if your shot goes out before the four crossings, but it’s really your opponent’s fault for hitting it too hard? Presumably you are not penalized, but this requires adjudication.
June 10, 2013 at 4:50 am
Nataly
I read the article but don’t ralely get it, though it seems to explain the high pressure over Greenland plus the faster ice loss in the arctic and the global weather pattern changes due to atmospheric changes. Maybe you get it and can explain it in short? If it is a good basic model then it will be applied and explained in the pop sci press in short no doubt. Still freaking out that my excel table of IJIS data shows 778000 less than 2007 record and loss in september at avg. of 24000 per day to date. According to Werther’s comment on Neven’s latest blog entry this may be due to water temps being above zero in north. Maybe this will keep up till October falling 3.2 million for IJIS. The thinness is no doubt to blame with wind pushing (new patterns due to Greenland highs explained above acclelerating loss?) the thin ice around, which are disconnected to one another in small blocks so satellite thinks they are a big block but are not so they tip over in the warm flows and melt apart as they get less and less dense(deep warm water still present from “Arcticane”).
June 10, 2013 at 10:33 pm
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September 3, 2013 at 6:29 am
Cammie
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October 16, 2013 at 3:57 am
Pebbles
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October 17, 2013 at 1:49 pm
Arquivo
What a joy to find such clear thkngini. Thanks for posting!