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Einstein Pedometer App Measures Relative Time Gain

wanerious Re:relative to what? (148 comments)

You should rest easy! It's been confirmed directly using planes and atomic clocks: http://en.wikipedia.org/wiki/Hafele%E2%80%93Keating_experiment as well as in observed ratios in muon detections from cosmic rays and in the operation of particle colliders like the LHC and at Fermilab. Also, interestingly, it is what is ultimately responsible for magnetic fields. The fact that you can stick these things to your fridge is a consequence of time slowing down and space shortening for charges in motion. It's fascinating.

about 3 years ago
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Milky Way May Have Dark Matter Satellite Galaxies

wanerious Re:A galaxy of what? Dark stars? (174 comments)

Because it's collision-less, there's no effective way for a cloud of mutually-attracting DM particles to lose energy other than gravitational radiation. Normal matter will collide and heat up (accretion disks), losing kinetic energy as well as potential, and coalesce into a smaller object. DM clouds, as I understand it, have a much larger timescale for collapse. They don't "clump" very fast.

more than 3 years ago
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Hank Chien Reclaims Donkey Kong High Score

wanerious Re:My Hero (122 comments)

Wow --- blast from the past. I remember playing with a friend of mine in 9th grade at a local pizza joint. We each got good enough to roll it (I think that was level > 255) and play all day on a quarter each. That was really the way to do it since we got a break after each of us died. What a rush that game was.

more than 3 years ago
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How To Get a Game-Obsessed Teenager Into Coding?

wanerious VPython (704 comments)

My 14-year-old has expressed a mild interest in programming, so I'm going to load up VPython for him to try. The language is easy to learn, and he can make things "happen" on the screen very simply. It's a first introduction to watching what happens in loops, conditional statements, and then graphics terms like textures, polygons, and lighting. Sounds like a perfect introductory mix. I would have loved such a thing when I was getting started.

more than 3 years ago
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Lost Ends

wanerious Re:Flash Sideways (955 comments)

Juliet said "it worked" and also "let's get a coffee sometime" because as she was dying she caught a glimpse of her "purgatory" meeting with Sawyer. It actually didn't have anything to do with the bomb.

more than 3 years ago
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Most Useful OS For High-School Science Education?

wanerious An anecdotal sample... (434 comments)

From the last two physics and astrophysics conferences I've been to (last 2 years) it's been running around 80-90% Mac. I actually tried to keep a more or less random sampling from the sessions I went to and counted up to about 100 computers each time.

more than 3 years ago
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National Academy of Science Urges Carbon Tax

wanerious Re:Who is going (875 comments)

I have to confess that I don't understand --- what will increase in response to CO2? What is the timescale?

more than 3 years ago
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National Academy of Science Urges Carbon Tax

wanerious Re:Who is going (875 comments)

Right, but that's 3% over equilibrium, and it's cumulative.

more than 3 years ago
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Record-Breaking Galaxy Cluster Found

wanerious Re:collapse at any minute? (246 comments)

I'm having a hard time understanding the question. The universe expands at different speeds that depend on the distance from us. If you're asking about a collapse where all the objects are moving towards us at the exact same speed, and if that speed were the speed of light, then we wouldn't see them until they were right on top of us. But the physical model for that is difficult to imagine.

more than 3 years ago
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Record-Breaking Galaxy Cluster Found

wanerious Re:collapse at any minute? (246 comments)

We'd know, because then objects that are 4 billion ly away would show a blue-shift.

more than 3 years ago
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Utah Assembly Passes Resolution Denying Climate Change

wanerious Re:I love to be the first to say this... (787 comments)

There are some factors you're apparently unaware of. The long-term trend over many decades is roughly 0.15C or so, but on the scale of a particular decade, roughly 4 main variables influence warming: CO2 excess, El Nino cycles, solar radiance, and aerosol cooling (volcanoes, say). Over the last 12 years we've had, in combination, a decrease in El Nino heating from a record 1998 (which is why many "skeptics" pick this year as a starting point) as well as a cooling cycle in solar radiation. They both operate on roughly the same timescale. Underneath that, the CO2 excess from humans contributes a fairly constant 0.2C per decade of warmth, which is why the last decade and a half have shown roughly flat temperature increases instead of the expected cooling. If you look at the temperature plots, you can see this "wiggle" happening on a regular basis. We'd then expect, over the next decade, to have rapidly increasing temperatures as all the warming factors are positive, then probably a flat profile after that. The long-term trend, as shown in the plots, is still rising.

more than 4 years ago
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Martian Microbe Fossils, Not So Debunked Anymore

wanerious Re:undebunked? (306 comments)

Bedunkedunked

more than 4 years ago
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Dark Matter Particles May Have Been Detected

wanerious Re:It must be true! (156 comments)

Thanks --- I was terribly imprecise in my haste.

more than 4 years ago
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Dark Matter Particles May Have Been Detected

wanerious Re:It's the lack of energy, stupid! (156 comments)

I think the chances of the above being at all *right* is the 3-sigma event they're looking for. :)

more than 4 years ago
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Dark Matter Particles May Have Been Detected

wanerious Re:1:4? (156 comments)

Their fiendishly clever plan to get more money hopefully flew under the radar of the other standing-room-only particle physicists and cosmologists in attendance at the seminar where the results were announced.

more than 4 years ago
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Dark Matter Particles May Have Been Detected

wanerious Re:It must be true! (156 comments)

You mean the cautious interpretation that it's only 77% or so likely to be a positive signal? What does it mean that such a forecast is never wrong? I think science feels more like religion when you decide that's how it works. Do you have an alternate suggestion for interpreting this dataset?

more than 4 years ago
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Obama Kicks Off Massive Science Education Effort

wanerious Re:And In Unrelated News... (801 comments)

I'm honestly having trouble coming up with an example of how, say, some item in a math curriculum is "right" for one district and not another. I might be on your side if there were actual experts in the fields making decisions on school boards instead of, for example, policemen and dentists deciding what a biology curriculum should include. Substituting experts making decisions on a national scale is a pretty good idea.

more than 4 years ago
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Bizarre Droid Auto-Focus Bug Revealed

wanerious Re:Wow (275 comments)

That's because causation generates correlation. :)

more than 4 years ago
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Possible Dark Matter Signs At the Core

wanerious Re:Explanation Impossible (234 comments)

Oh, boy. Either you willfully neglect or are not aware of the gravitational radiation emitted from binary pulsars that must propagate at the speed of light.

I suppose, then, that the electric interaction is also infinitely fast, since otherwise electrons would have left their orbits around protons long ago.

more than 4 years ago

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