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Comment: Water (Score 1) 500

by J05H (#39783365) Attached to: Planetary Resources Confirms Plan To Mine Asteroids

Water is by far the driving material resource. Metals are insignificant compared to water for human utilization. That Planetary Resources wants to track NEOs is also important. They have definitely done their homework.

When this news started to break last week it was unclear if they were just going after PGMs or had a more comprehensive strategy.

Comment: Minerals are not the next step (Score 1) 531

Electricity is the next step. Power beamed to provide propulsion and operating energy to other spacecraft. After that, beamed power to new space facilities, then gigawatts of green power to Earth.

Then water. Jim Head says "Follow the water." Find water sources that are at or near the top of the gravity well - Phobos, Deimos, Amor-Atens or Earth-crossing NEOs with high water content.

Those two resources enable reliable access to the Lunar and Martian surfaces. Minerals, lunar polar ice and many other elements are further down the list of needed (re: profitable) materials.

That said, such a well-heeled team has surely looked deeper into the specifics.

Comment: Bussard solution (Score 1) 458

by J05H (#39223677) Attached to: Warp Drives May Come With a Killer Downside

This could be an application for a Bussard Ramjet - collect the forward wave's particles for power or thrust. TFA said the problem is mostly blue-shifted components in the front wave, just remove the problem.

Also if Alcqubiere Drives are possible, they will make terrifying weapons. It's a neutron bomb for an entire solar system. *shudders*

Comment: Re:Maybe... (Score 1) 775

by J05H (#39025297) Attached to: Is Santorum's "Google Problem" a Google Problem?

Most of the younger generation knows "Santorum" as the slippery substance first and are surprised then LOL when discovering such a deserving ... person shares that name. Google has nothing to do with the search results beyond providing the framework. Search result modification by popular participation is a valid form of social critique.

Cellphones

The iPhone Is a Nightmare For Carriers 438

Posted by Unknown Lamer
from the greed-begets-greed dept.
New submitter HungryMonkey writes "According to the latest EBITDA numbers from AT&T, Sprint, and Verizon, the subsidies they have to pay Apple in order to carry the iPhone are drastically reducing their profits. From the Article: '"A logical conclusion is that the iPhone is not good for wireless carriers," says Mike McCormack, an analyst at Nomura Securities. "When we look at the direct and indirect economics that Apple has managed to extract from the carriers, the carrier-level value destruction is quite evident."' So one money sucking leech has attached itself to another money sucking leech?"

Comment: Re:No wear rockets? (Score 1) 227

by J05H (#37571690) Attached to: SpaceX Reveals Plans For Full Launch System Re-usability

100X cheaper is roughly $100 per pound to LEO. That is absolutely doable with robust RLV architectures. It's just that no one has really tried yet. Musk has shown an entirely new way of building and operating otherwise conservative rockets. He chose the most known path (single core, 2nd stage, capsule) for a default cargo/crew system but used his knowledge of innovation to make that into the most affordable rocket on the planet, in 8 years.

Comment: Re:DCX - SSTO (Score 1) 227

by J05H (#37571144) Attached to: SpaceX Reveals Plans For Full Launch System Re-usability

This is one of the advantages of older water-landing proposals like the Boeing LEO from the 70s. It would have reached terminal velocity in the atmosphere then propulsive braking and dropped into a freshwater landing pond. That was for much, much larger hardware. Jon Goff has done extensive trades on propulsive vs heatshield/chute/etc reentry methods and propulsive comes out looking pretty good.

This reusable Falcon will have the same fireproof curtaining between it's engines and the rest of the outside is metal so not much of it will burn. Still has the issue of blast coming back from the tarmac. The animation's landing legs are pretty hefty, have to wait and see on real hardware.

Comment: Re:Oh if only (Score 1) 291

by J05H (#37238412) Attached to: Russian Resupply Crash Could Mean Leaving ISS Empty

It was to late to restart the contracting process by the time Obama came into office in early '09. To many contractors had already laid critical staff off. Shuttle was a dead letter after the Columbia tragedy; after RTF they were only flying out the remaining manifest. CCDEV, especially SpaceX and Boeing, is the way to go forward. Wings don't matter where there is no atmosphere.

Comment: Bring it (Score 1) 534

by J05H (#37144190) Attached to: What If Aliens Came To Save the Galaxy From Mankind?

We nuked each other, we'll nuke the little green buggers too.

My real critique of this is why would the aliens care so much for Earth's environment. We are a very aggressive, technical species with a penchant for things like nuclear bombs. Logically if they were going to exterminate us it would be for those reasons not because we don't tend the daffodils.

Security

DHS Tries To Hide Mobile Scanner Details 201

Posted by Unknown Lamer
from the the-new-black dept.
OverTheGeicoE writes "The Electronic Privacy Information Center filed a Freedom of Information Act request last year (PDF) with the US Department of Homeland Security, whose Transportation Security Administration has been investigating the use of x-ray scanning technology for covert use in more public places, like train stations and even ordinary city streets. TSA has tested interesting devices like the Z Backscatter Vans both privately and on members of the general public. EPIC recently received new documents from DHS. Some of the documents are almost completely black from redactions."

Comment: Takoradi Fab Lab (Score 2) 229

by J05H (#36873146) Attached to: Ask Slashdot: Geeky Volunteer Work?

Go to the tech college in Takoradi, Ghana and install a FabFi mesh network. The students have to go to an Internet cafe for network access. They were one of the Fab Academy labs this year but had trouble keeping up due to lack of access.

This might not be as basic as digging wells or whatever but is much more technical.

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