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re: Space Log: Wipeout grounds shuttle astronaut
ReneCardenas   3/31/2011 2:46:46 PM
He is lucky that he did not suffer more permanent and debilitating injuries, while bicycle riding as injuries go; in the DFW area alone there have been many cyclists’ troubles, including pedestrian/jogger into bicyclist and also into each other. http://www.dallasnews.com/news/community-news/dallas/headlines/20101013-Pedestrian-cyclist-injured-in-2-5581.ece There are many other modern gyms with great alternatives and better controlled environments, so it’s somewhat careless to expose ourselves to danger if you are schedule for such a privilege opportunity.

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re: Space Log: Wipeout grounds shuttle astronaut
WKetel   2/19/2011 5:25:51 PM
Dave is certainly correct, of course, the difference depends a lot on how hard one rides the bike. Pedaling exercise is good for a few muscles, but the serious effort of keeping the bike under the rider uses a whole lot more muscle groups. At least, for me it does.

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re: Space Log: Wipeout grounds shuttle astronaut
Dave.Dykstra   1/23/2011 5:59:02 PM
But training on a stationary bike does not provide quite the same level of training and physical tuning as a normal bike - an important distinction for athletes such as the astronauts. This is somewhat similar to the difference between running on a treadmill and running on a track or street.

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re: Space Log: Wipeout grounds shuttle astronaut
george.leopold   1/19/2011 10:48:38 PM
The only person traveling through time was your humble columnist. The correct date of the accident was Jan. 15. Apologies.

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re: Space Log: Wipeout grounds shuttle astronaut
danlutes   1/19/2011 7:46:46 PM
Was Kopra's bike accident on Feb 15 last year, or maybe last Saturday on Jan 15?

As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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