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Comment Fixed capacity (Score 1) 81

One important point that others above have alluded to but haven't outright stated:

While the exponential scaling of rocket equation is an important limiting issue when building larger and larger rockets, for any given rocket (or rocket configuration) the payload capacity is fixed. If you have a payload that is too large for a Falcon 1Pegasus, but doesn't need the full capacity of a Falcon 9, all that extra capacity goes to waste. It costs essentially the same amount to launch a Falcon 9 at 60% capacity as it does to launch it at 90% capacity. You can share payload with multiple customers, but that limits which orbits they can use.

Space X can calculate how much weight the recovery system and fuel requires and how much money they can save by reusing the first stage, and give a discount to customers who give up that additional payload capacity. If there is a market for those lower cost launches, then great. If not, then keep treating the 1st stage as disposable.

Comment Re:Hmm (Score 2) 81

Running a business like this takes a lot of work, and for it to succeed well enough to actually get working rockets off the ground you need to attract top-notch engineers who believe that working for you isn't just a waste of their time (more than a billionaire's plaything), and management that can create the right environment for them to succeed without blowing through your money for nothing. It is much less expensive, less risky and less time consuming to just pay Russia for a thrill ride than to create your own rocket company. So I can understand why most would choose to go that route, and leave the latter for those who genuinely want to shake up the market.

Comment Re:it can be air filled (Score 2) 200

That said, the total payload mass that the ship could support is roughly the same whether it is inside the airship or outside in a gondola, and the more space you want to make available for use, the more mass you would have to dedicate to structure rather than payload. So it would be less cramped than a tiny capsule, but you would still need large expanses of mostly empty space to provide the needed buoyancy.

In practice, it might be better to have a balloon filled with a less dense gas to decrease the total volume needed to support the desired payload, and then have an attached air-filled "gondola" that is nearly as large as the balloon.

Comment Do It On The Cheap (Score 3, Informative) 280

I would highly recommend you take as much as possible at community colleges, paying as you go. The universities in my state (New Mexico) accept community college credits very, very well. Slightly before you've exhausted the community college course load, apply to, and get accepted into, a bachelor's program in some sort of engineering (not all science degrees are equally marketable.) After you're accepted, and have completed a year or two's worth of marketable engineering courses at the community college, you should be able to get an engineering internship and continue to pay cash for classes. These student, engineering, jobs (in my state) pay more than English degree professional jobs do. I've seen this approach work with computer science students.

My state has extremely inexpensive, or free, tuition for residents and access to a huge amount of engineering resources (two national labs + tons of military bases + the initial stages of a tech start up scene) as well as dirt cheap cost of living. I realize this approach might not work well in other states, but that's the approach I talk with people about. I'm working with a guy that studied music, but is getting into web development. His goal is to get accepted into a master's program, and spend an extra 2-3 semesters in it taking undergrad courses. If he can get funding (as a research assistant, or teaching assistant) that will be a great approach too.

Comment Re:JPEG2000 replaced JPEG (Score 4, Informative) 377

You don't have to wait for someone to pop out of the woodworks. BPG is nothing but a still frame of HEVC video which is patented up the ass. Bellard and other open source video authors are accustomed to ignoring the patent situation because they don't really have a choice if you want to be interoperable, but that isn't an excuse for creating patent problems in a field where there are already widespread royalty free standards (JPEG, PNG).

Comment Re:Cheap? (Score 1) 52

I agree - the plastic holding it together isn't going to be the expensive part...I think for this drone the expensive parts are probably going to be the research and development, rather than any manufacturing. This sounds super cool, and possibly have tons of interesting ramifications in materials science, manufacturing, and other fields, but I haven't ever really heard of any long term vision, government funded, R&D project described as "cheap."

Comment Re:Phew (Score 1) 191

Yeah same here. The only bad thing I saw were the MRAPs which have already been in the local news. I can't imagine that there are enough situations where such a vehicle would be needed to justify the high maintenance costs. They are mostly used for show, as projections of power.

Other than that, it's a bunch of useful items. The larger police departments got explosive ordinance disposal robots, scopes, utility trucks, helicopter. The forest service got a bunch of night vision supplies. The department of corrections got a big ol power distributor. One of the more rural tribal departments got a road grader, some generators, welders, and even a field kitchen.

Good to see that tax payer funded equipment going to good use.

Comment Re:Comparison to Wikinews (Score 1) 167

Well based on the current interface, it will differentiate itself by making articles a series of disconnected statements, with no editing for flow at all. This makes it easier to link back to the original source of each statement, but kills any sort of readability like the worst of the inverse pyramid writing style rising again after its near death.

Comment Re:US Centric? (Score 1) 167

I still don't know what to make of this since it wasn't just one paper, but all the ones I looked at. I'm no conspiracy nut, but how does that happen?

If they were all wrong in the same way, it is possible you were just reading slightly edited versions of the same account provided by a news feed like the Associated Press.

Comment The speech synthesizer was not changed (Score 3, Informative) 56

From the second link:

Wood showed WIRED a little grey box, which contained the only copy of Hawking's speech synthesiser. It's a CallText 5010, a model given to Hawking in 1988 when he visited the company that manufactured it, Speech Plus. The card inside the synthesiser contains a processor that turns text into speech, a device that was also used for automated telephone answering systems in the 80s.

"I'm trying to make a software version of Stephen's voice so that we don't have to rely on these old hardware cards," says Wood. ...

Hawking is very attached to his voice: in 1988, when Speech Plus gave him the new synthesiser, the voice was different so he asked them to replace it with the original. His voice had been created in the early 80s by MIT engineer Dennis Klatt, a pioneer of text-to-speech algorithms. He invented the DECtalk, one of the first devices to translate text into speech. He initially made three voices, from recordings of his wife, daughter and himself. The female's voice was called "Beautiful Betty", the child's "Kit the Kid", and the male voice, based on his own, "Perfect Paul". "Perfect Paul" is Hawking's voice.

Comment Re:BLUE ray (Score 2) 194

If you look at the absorption and efficiency plots in the linked nature abstract, the improvement is pretty broad spectrum as it is. Based on the Fourier analysis plots, it does seem like a slightly wider pit spacing would better concentrate the energy in their desired sweet spot, but CDs and DVDs would be too wide. HD-DVD actually looks like it might have the most ideal pit spacings.

Comment Re:BLUE ray (Score 4, Insightful) 194

Now that they have a proof of concept, it is an obvious thing for researchers to try different pit sizes and patterns in order to optimize the efficiency

Actually, that already happened. As the abstract of the paper notes, previous research has already identified how to theoretically optimize patterns, but arbitrary patterns require expensive photo lithography equipment to create. This research shows that an existing inexpensive mass production technique generates results that are almost as good as the optimized patterns, but not quite as good because the spacing of the pits is a bit too periodic (especially across tracks rather than along them).

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