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Comment Re: Weirdly specific statement (Score 1) 55

What is the limiting factor? Buildup of CO2?

People need a certain amount of oxygen for their metabolism, you need to carry that much. CO2 effects the blood pH: too little and the body is too alkaline, too much and it's too acidic. So, you need to maintain a precise amount of CO2 and remove the rest. The scrubbers in the space shuttle were able to regenerate the CO2-absorbent material after use, so there was use of power but material wasn't consumed.

Beyond this, you need to control temperature and humidity. The other requirements than atmosphere for crew survival are that you water, feed and shelter the crew, maintain orientation, and maintain a G-force envelope that doesn't injure the crew.

Comment Re:With a reason? (Score 1) 188

So long as there's rhyme and reason to the numbering scheme, I have no problem with it.

BMW does this, and it's awesome. The first digit is the body style (3 is small, 5 is mid, 7 is large), and the next 2 digits are the engine displacement.

Except when they aren't; these days, the next 2 digits may, or may not, have any connection to the engine size. For example, both the BMW UK page giving technical data for the 3 series and the BMW USA page for building your own car, after selecting the 3 series sedan indicate that both the 320i and the 330i have a 2-litre turbo 4, with the 330i just having a more powerful version.

Submission + - September 19th SpaceX Launch will be visible across California, Nevada. (reddit.com)

Bruce Perens writes: The nighttime launch of a SpaceX Falcon 9 containing Iridium satellites at 9:49 PM PST Monday September 19th from Vandenberg AFB SLC-4 is likely to be visible across California and in some Nevada locations. Although Vandenberg has a landing pad for the Falcon under construction, this will probably be a drone-ship landing and some California observers might see two of the landing burns.

Submission + - Bandcamp: the Holy Grail of online record stores (rocknerd.co.uk)

David Gerard writes: Is Bandcamp the Holy Grail of online record stores? Hell yes. Unencumbered downloads in any format you like, excellent discoverability and a ridiculously better experience than any other download store. Musicians too: "The interface and the available tools are all so well-thought-out it’s genuinely a pleasure to use." They also like that they straight-up get 85% of the take.

Comment Re: It's research... (Score 1) 147

Tee hee! Back in the day, one of the points I made to the old farts was that I had passed the 20 WPM exam and had my K6BP call to show for it, but refused to use the code on the air until the requirement was gone. Nobody spat at me or punched me out, the worst that ever happened was a poor behaving slim using my call and a postcard from the ARRL observer who thouht it was me.

Comment Re:It's research... (Score 3, Informative) 147

WSPR tells you when communication paths are open between two points at a specific frequency and S/N ratio. This is useful but does not span the extent of research that HAARP is directed to. One of the most interesting things about HAARP is that it can incite the formation of radio-reflective regions in the ionosphere. That takes a lot of power.

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