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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.

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.

Comment Re:It's not aliens (Score 1) 246

What's to say they will not have actually learned anything or grown beyond their imperialist phase by the time they are so advanced?

That's not really the argument, is it? By the time they're that advanced, we have nothing they need. If we have anything they want, it's either food or culture. Maybe sentients are a delicacy, so that's a potential threat, but otherwise we'd be more valuable as we are — producing art, literature and so on. Then they can point at the monkeys and laugh.

Comment Re:These are good changes (Score 1) 66

Binge-on isn't a data cap, it's a bandwidth limiter.

If you think that 10+ phones using DASH, RTSP, etc, to try to stream an HD video (5Mbps+) out of a single 50Mbps LTE tower, isn't going to cause severe problems for everyone else using that tower, then you have a strange understanding of network protocols and video protocols in particular.

I'd also like to know where the "money making ploy" is in a system that gives you unlimited video for free if you're willing to stream it at lower, DVD-quality, bitrates.

Comment Re:It's not aliens (Score 5, Interesting) 246

Aliens that are advanced enough to signal us with that kind of power aren't going to find us advanced enough to be worth talking to if they can even understand our primitive methods of communication at all.

Sometimes we make noises that will attract animals so that we can study them.

Comment Re:Misleading (Score 1) 137

The driver will not be able to reactivate the Autopilot until the car is stopped and put in 'Park.'

That's a really bad idea. If they really want to punish them, they should use a timer instead.

A few years ago, a friend drove a Prius and the GPS navigation input function didn't work unless she went less than 5 miles an hour, so what my friend ended up doing was slowing down at the most inappropriate places on freeways and highways just so she could use the built-in navigation.

No doubt, frustrated Tesla drivers will just start parking their car in the middle of the roads just so they can re-engage their auto-pilot. That's what happens when one tries to use technology to control human beings. Those human beings start rebelling and start acting like even bigger idiots, possibly causing even more accidents. Also, I suspect that many Tesla owners will just try to disable/postpone this last update for as long as they can.

Comment Re:Next Phase (Score 1) 583

The speed is less important than energy delivered at site of impact. [...] Fan rotors move slower, but are more massive, and have more total energy behind them. You dont need something to be sharp or fast moving to cut you in half; it just needs to exert enough energy over a small area to cause mechanical shear of your body.

Okay, let's try to stay on topic.

Getting a loop of wire from a wench wrapped around a leg and slowly slooped up will chop it off just as surely as if the wire was moving fast but at less torque.

Unless the wire catches on a bone, and the wire is thin enough to snap there. But let's fucking stay on topic. We don't need ridiculous examples designed to distract people because they contain an injury to discuss the topic at hand, you sensationalist nutter.

In fact, there are multiple factors involved in determining how much force it's going to require to break the silly string, and in how much force is being delivered. One of the factors is the force applied, one of the factors is the time in which the force is applied and how that affects the material in question, one of the factors is the quantity of material the force is being spread out across. And in spite of being a lot smaller and less massive, the tip of a quadcopter blade is going to impart a lot more energy to a much smaller section of silly string than a metal fan blade is, because the fan blade is squared off (being stamped from a piece of metal) while the tip of a rotor is very sharp, and the rotor is moving much much faster and F=MA. There's a lot more A in the quadcopter system. But wait, there's more; you only have to consider the effect of its mass until the string breaks. If the string breaks at a level of force which can be achieved with the current acceleration at lower than the actual mass, then the additional mass of the rotor is irrelevant here.

There are lots of other factors, but these are the ones that we've been talking about in this discussion already.

To be a proper experiment, it needs to be a high speed metal bladed fan, with big heavy blades. I can probably find one if I look hard enough.

Only the speed is likely to be relevant, and it will still have a dramatically lower tip velocity than a quadcopter doing anything but hovering.

Comment Re:"topic of discussion for many across the world" (Score 1) 111

Since when is CNN left?

So you mean the external renaming to 'Clinton News Network' was only because the letters matched?

So you mean the external renaming to 'Clinton News Network' was only because the letters matched?

Clinton is not a liberal. She is a neocon. Trump is not a conservative. He is just a sleazebag.

I never said she was a liberal, historically liberals believe in personal liberty... she does not. She's very much a illiberal progressive.

What? You just contradicted yourself there completely, smart guy. Care to rephrase your sentence until it makes sense? Here, this might help. Don't go alone, take one of these. Maybe then you'll have some idea what the words you're using mean.

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