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Submission + - Jeff Bezos, of Amazon.com and Blue Origin, wants to move heavy industry to space (blastingnews.com)

MarkWhittington writes: SpaceX’s Elon Musk wants to settle Mars. To be sure, Musk’s rival, Jeff Bezos, CEO of both Blue Origin and Amazon.com, thinks that is pretty cool too. But he has just as an ambitious vision for the future. He would like to move all heavy industry into space, according to Recode. The Earth would be rezoned for residential and light commercial use.

Comment Re:Moronic to say the least (Score 1) 602

. . .but I think the idea is to actually have less accidents. . .

And you're wrong to think so. Crashes are generally classified by type with a cost assigned to each: fatal, major injury, minor injury and property damage only (PDO). An uncontrolled intersection may have on average 0.25 fatal crashes per year, and through examination of similar intersections we might predict that adding controls will change that to 5 minor injury and PDO crashes per year. Because the monetary cost assigned to the fatal accident is so (justifiably) high, the controls should be added even though the total number of crashes increases.

Comment Re:More nation-wrecking idiocy (Score 4, Informative) 602

Here's a well-traveled street straddling Beverly Hills and Los Angeles. It has no longitudinal traffic markings, and particularly from 3:00PM to 7:00PM has heavy traffic. The accident rate is modest, particularly given its narrow width and placement parallel to and between two major arterials.

Here's a well-traveled street in Fairbanks, AK. From October until April there is regularly snow that can quite effectively cover lane markings for days or months at a time. For example: I noticed this morning, only because the packed snow and ice had finally worn away enough to make the markings faintly visible, that I was driving through a painted median. A week ago I noticed three cars side-by-side to make left turns into two receiving lanes because snow had obscured the lane markings; they worked it out when the light changed and nobody died.

Three years ago, as the traffic & safety engineer, I was designing the signs and markings for a rural two-lane road that hadn't been previously paved. One discussion was the necessity of the inclusion of longitudinal markings. In the end, we painted the center lines and excluded the edge lines.

In the US, the MUTCD establishes a base requirement for center line markings on roads "that have a traveled way of 20 feet or more in width and an ADT of 6,000 vehicles per day or greater" or on two-way roads "that have three or more lanes for moving motor vehicle traffic." On many roads, center lane lines are already optional and their exclusion isn't an inherent problem. I might argue differently about reactionary idiots, however.

Comment Re:Great, first, global warming, now global fatten (Score 2) 34

Did you completely flunk Physics??? Orbital speed is set by orbiting mass. . .

Well, it looks like you struggled in either physics or English. Your statement only bears meaning if the orbiting mass is any significant portion of the primary body. Even Jupiter is only 0.1% of the mass of the sun, so it's mass is irrelevant in computing its orbital velocity about the sun.

Comment Re:Why not lost wax? (Score 1) 49

I had the same thought recently. Shapeways offers parts printed in wax for casting. I question the value, though, as shipping may well warp waxy materials. There are also others selling materials intended specifically for lost investment casting. Still others thought to see whether PLA could be used directly for lost investment casting with good results. The author at the second link used foam strips, presumably because it's cheap and fast, which 3d printing generally isn't.

Comment Re:Use a hair dryer (Score 1) 347

A hair dryer also softens the decal, which tears. These remove decals very quickly. Most of the residue is gone, and you have no worries about overheating the paint. It's best done with a pneumatic die grinder with a mandrel. After the decal is removed, the use of rubbing compound removes the top layer of oxides from the paint, and only the fussiest of inspections will find any sign that there was ever a decal.

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