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rick merritt
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I'm happy to donate two lattes
rick merritt   11/25/2013 1:06:28 PM
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Cool post, Eric!

ologic
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Mars obsession
ologic   11/23/2013 5:19:28 AM
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Unfortunately, NASA has been narrowing the focus of the space exploration program by focusing essentially on Mars at the exspense of other targets :

http://www.scientificamerican.com/article.cfm?id=has-nasa-become-mars-obsessed

 

Science is the first casualty of such "monochromatic" program.

Bert22306
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Re: cost
Bert22306   11/22/2013 5:06:36 AM
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Don't get me wrong, I'm completely in favor of space exploration and to me, this is money well-invested. But the costs quoted are sort of all over the map.

I belive the article puts the cost at $671M, or 2/3 of a billion. This sounded a bit steep for even a Hollywood movie. So I checked Wikipedia, and supposedly the most expensive Hollywood movie was Spiderman 3, at $258M. Quite a bit cheaper. As to comparisons with military hardware, for a single platform and a single unmanned mission, we're in the same ballpark, actually.

Caleb Kraft
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cost
Caleb Kraft   11/21/2013 4:40:15 PM
I love the quote about the cost being about the same as a feature movie about going to mars. it really hits home about how small these things are in comparrison. They didn't go there, but sometimes we get comparrisons to military and the speed at which our military can burn through 67mil is ... well, the blink of an eye.



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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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