Please create an account to participate in the Slashdot moderation system


Forgot your password?

Comment: Re:Wildly premature question (Score 1) 79

by Bruce Perens (#48620117) Attached to: SpaceX To Attempt Falcon 9 Landing On Autonomous Spaceport Drone Ship

If we look at jet aircraft, wear depends on the airframe and the engines, and the airframe seems to be the number of pressurize/depressurize cycles as well as the running hours. Engines get swapped out routinely but when the airframe has enough stress it's time to retire the aircraft lest it suffer catastrophic failure. Rockets are different in scale (much greater stresses) but we can expect the failure points due to age to be those two, with the addition of one main rocket-specific failure point: cryogenic tanks.

How long each will be reliable can be established using ground-based environmental testing. Nobody has the numbers for Falcon 9R yet.

Weight vs. reusable life will become a design decision in rocket design.

Comment: Tucows - good and bad (Score 1) 64

by wytcld (#48617923) Attached to: A Domain Registrar Is Starting a Fiber ISP To Compete With Comcast

Tucows has Ting cell service - which if you don't mind being on Sprint's network is quite a bargain, and the staff is friendly. They also have the Hover retail registrar - which refused to support DNSSEC for domains registered there, even if you run your own DNS, unless you pay them $500 per domain for their help with it. Management at Hover is hostile to users.

Comment: Re:why is it AP? (Score 1) 191

You don't need basic computer education early. You need basic math education early. You need people to learn the basics of arithmetic early enough that you can move on to other things later, but still before high school -- other things including Boolean logic and alternate number bases as well as algebra, geometry, trignometry, and the usual.

Comment: fuel weight (Score 3, Insightful) 79

by trybywrench (#48616357) Attached to: SpaceX To Attempt Falcon 9 Landing On Autonomous Spaceport Drone Ship
I thought the main limiting factor of lifting mass to space was also having to carry the fuel with you? SpaceX hauls its fuel to get to space and even extra fuel to land. How are they able to afford to lift the extra mass? Are their engines that much more efficient? I'll stop with the questions marks ;)

Comment: Re:Brian Krebs received one & posted it... (Score 1) 249

by hey! (#48605663) Attached to: Sony Demands Press Destroy Leaked Documents

The lawers' grasp of the rules of English capitalization does not inspire confidence:

“SPE does not consent to your possession, review, copying, dissemination, publication, uploading, downloading, or making any use of the Stolen information, and to request your cooperation in destroying the Stolen Information,”

It reads like a bad fantasy novel full of Portentous Capitalization.

Excessive login or logout messages are a sure sign of senility.