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Comment: Re:Not sure about the recovery test (Score 1) 121

by Hadlock (#46795645) Attached to: SpaceX Launches Load to ISS, Successfully Tests Falcon 9 Over Water

The weight of the fuel decreases as you burn it out the back of the rocket, increasing efficiency For each second of the burn. Second, did you account for the rotation of the earth underneath the rocket? Zeroing out the forward momentum does eat up most of the fuel, but you don't need a whole lot of forward velocity to fall down a parabolic arc from that height to return home. Landing requires about 60m/s of delta v at it's new mass.

Comment: Re:Not sure about the recovery test (Score 4, Informative) 121

by Hadlock (#46793273) Attached to: SpaceX Launches Load to ISS, Successfully Tests Falcon 9 Over Water

The rocket (1st stage) when empty needs almost no fuel (about 4% of the total fuel at launch) to return to the launch site and land. The upgraded Falcon v1.1 has 10% more fuel at launch as well as increased cargo capacity (more efficient engines). Hitting a floating barge means you have to have good conditions at the launch site, as well as 400 miles out at sea as well. That dramatically limits your launch capability and exponentially increases your recovery costs.

Comment: Re:Why spend another $700 for a car stereo (Score 1) 193

by Hadlock (#46764015) Attached to: How Apple's CarPlay Could Shore Up the Car Stereo Industry

That's pretty much the exact opposite experience I've had. I've never had an issue with BT audio, even once. Range seems to top out at about 30 ft and for music listening, is perfect. I've run in to audio lag (20-40ms) issues when streaming audio to bottom tier $20 adapters but it's completely replaced physical audio cables in my house. The sounds system in the living room and bedroom both use it exclusively and I just stream to either/or from my phone as the "head unit" and use the speaker system as a dumb Amp.

Comment: Re:The magical scenario is "gradual social decay." (Score 1) 733

by Hadlock (#46738461) Attached to: Ask Slashdot: Are You Apocalypse-Useful?

You could rev up to about 1940's era technology pretty quickly. With the exception of flat screen TVs, the internet and integrated circuits that brings us pretty close to modern standards of living. After that you've exhausted all of the low hanging fruit like high tensile steel, most ceramics and crude plastics. Space age technologies (flexible products like modern rubber, silicone rubbers and other elastomers, hyper pure titanium, rare earth alloys, etc and of course Velcro) took about 4% of the national GDP to identify uses for, and then produce on an industrial scale over the period of a decade. This was on top of an incredibly prosperous era and winding down from the education boom of the 1940's that produced the scientists needed for the space race. Given any other outcome, we'd be lucky to have late 1980's technology today.

Comment: Re:trees have branches (Score 1) 1037

by Hadlock (#46681257) Attached to: How the Internet Is Taking Away America's Religion

There have been quite a few studies on how single-digit percent of Jews actively practice religion and/or marry a religious Jew; however those who observe at least some traditions from a cultural standpoint is well over 75%. We're all creatures of habit, but somewhere along the way we mixed religion and custom together.

Comment: Re:How much does it cost to upgrade? (Score 1) 245

by Hadlock (#46681019) Attached to: Slashdot Asks: Will You Need the Windows XP Black Market?

People were still implementing new, paper-based workflows in 2000. By 2004-2005 that had mostly gone away, but jumping from NT4 to 2000 meant jumping 25-40% of the office to a new version, typically the smarter and higher earners who deal with change fairly well.
By 2005-2006 you're looking at Vista era and half a decade of XP dominance, nowadays all employees not working in food service and/or retail are assigned a desktop. This resulted in a huge upswing of PC sales which has now leveled off. So now in addition to server class hardware and A-level users, you're also having to migrate your B, and in most cases C, D, and E-level users at the same time. Even the guy in the mail room needs a PC to check email from his boss and HR once a day. Our copy room has a desktop to open word files.

Comment: Re:Gee, so only a year of screaming (Score 4, Interesting) 387

It's the WS2012 R2 kernel wrapped with desktop widgets. I'll let you google from there, but the improvements are vast. If you know what you're doing you can hack in WS2012 R2 functionality like file deduplication and NIC teaming in to your 8.1 desktop.

Comment: Re:Wait a moment (Score 1) 123

by Hadlock (#46610335) Attached to: Classified X-37B Space Plane Breaks Space Longevity Record

I'd like to see Voyager handle reentry through Earth's thick atmosphere and land gracefully on a runway. THAT would be a sight to see. Voyager 2 technically survived going through the rings of Saturn, but even that managed to take out several instruments (even though, to save someone's career that's not the official reason why they mysteriously failed immediately after)

Thus mathematics may be defined as the subject in which we never know what we are talking about, nor whether what we are saying is true. -- Bertrand Russell