Search found 995 matches

by ijuin
Wed Mar 13, 2019 1:04 am UTC
Forum: Science
Topic: Extracting energy from a black hole via gravitational blueshift
Replies: 19
Views: 619

Re: Extracting energy from a black hole via gravitational blueshift

A one-dimensional frame does not contain angles, therefore it can have neither angular momentum nor rotation.
by ijuin
Mon Mar 11, 2019 1:12 pm UTC
Forum: Science
Topic: What if the second law was breakable?
Replies: 71
Views: 2688

Re: What if the second law was breakable?

Well, my point was that, even if there was a Kardashev Type IV civilization out there already disassembling things now, it would still take them much longer than the current age of the universe before they would be finished.
by ijuin
Sun Mar 10, 2019 3:27 pm UTC
Forum: Science
Topic: Extracting energy from a black hole via gravitational blueshift
Replies: 19
Views: 619

Re: Extracting energy from a black hole via gravitational blueshift

The Penrose process only extracts the rotational energy however. As far as we know, Hawking radiation is the only method for extracting its rest mass.
by ijuin
Sat Mar 09, 2019 6:52 pm UTC
Forum: Science
Topic: What if the second law was breakable?
Replies: 71
Views: 2688

Re: What if the second law was breakable?

Drifting into the realms of SF here, but if we assume one intelligent species, wouldn't they keep reducing all matter to a state where no useful work remained in the universe? Given sufficient time, yes. However, the necessary span of time may be long enough for most stars to die of old age in the ...
by ijuin
Sat Mar 09, 2019 6:49 pm UTC
Forum: Science
Topic: Extracting energy from a black hole via gravitational blueshift
Replies: 19
Views: 619

Re: Extracting energy from a black hole via gravitational blueshift

It’s not the time dilation where you lose the energy again—it’s plain old e = m * c^2. Your satellite climbing out of the gravity well is heavier by an amount equal to the energy gained by the photon.
by ijuin
Thu Mar 07, 2019 2:00 am UTC
Forum: News & Articles
Topic: The Darker Side of the News
Replies: 4393
Views: 642427

Re: The Darker Side of the News

I think you both missed the original reference. Opposition to estate taxes in the US were virtually always couched in some apocryphal story regarding a family farm that was being destroyed by inheritance taxes because the land value was so great that the working-poor family that had been there for ...
by ijuin
Wed Mar 06, 2019 9:16 pm UTC
Forum: News & Articles
Topic: The Darker Side of the News
Replies: 4393
Views: 642427

Re: The Darker Side of the News

But but but what if some imaginary family farmer has millions of dollars of damage to his cornfields, why shouldn't we raise that cap to cover his imaginary butt? Anybody who has millions of dollars worth of anything is more able to endure the damage than someone who did not have millions. Even fou...
by ijuin
Wed Mar 06, 2019 9:04 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 2120: "Brain Hemispheres"
Replies: 16
Views: 1732

Re: 2120: "Brain Hemispheres"

You can learn a lot from a dummy. Buckle your safety belt.
by ijuin
Wed Mar 06, 2019 9:02 pm UTC
Forum: Science
Topic: Circadian Clock
Replies: 15
Views: 678

Re: Circadian Clock

Of additional interest would be how people deal with the cycle of religious observances, especially if they insist upon synchronizing it with Earth schedules.
by ijuin
Wed Mar 06, 2019 3:17 pm UTC
Forum: News & Articles
Topic: The Darker Side of the News
Replies: 4393
Views: 642427

Re: The Darker Side of the News

The simplest remedy would appear to be to place a cap on individual payouts, similar to how FDIC only insures the first (at present) $250k.
by ijuin
Sat Mar 02, 2019 5:29 pm UTC
Forum: News & Articles
Topic: Trump presidency
Replies: 8423
Views: 737972

Re: Trump presidency

40-watt range? Anybody who thinks that forty watts is enough to kill a human without a direct brain strike does not understand plasma weapons.
by ijuin
Tue Feb 26, 2019 5:48 pm UTC
Forum: News & Articles
Topic: The Thread To Remind Me We're Living In The Future
Replies: 1916
Views: 356717

Re: The Thread To Remind Me We're Living In The Future

In short, I’m willing to pay more money to permanently end the invasion of my privacy than I am willing to pay to purchase their products, ever.
by ijuin
Mon Feb 25, 2019 1:11 am UTC
Forum: News & Articles
Topic: The Thread To Remind Me We're Living In The Future
Replies: 1916
Views: 356717

Re: The Thread To Remind Me We're Living In The Future

To err is human, but to really foul things up takes a computer.
by ijuin
Sat Feb 23, 2019 1:59 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2115: "Plutonium"
Replies: 34
Views: 3478

Re: 2115: "Plutonium"

Nah, it’s because Japanese phonetics doesn’t allow two consonant phonemes together, so “Pluto” is rendered as “Pu-ru-to”.
by ijuin
Sat Feb 23, 2019 12:20 am UTC
Forum: News & Articles
Topic: Trump presidency
Replies: 8423
Views: 737972

Re: Trump presidency

As the saying goes, it takes one to know one.
by ijuin
Fri Feb 22, 2019 6:40 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 2115: "Plutonium"
Replies: 34
Views: 3478

Re: 2115: "Plutonium"

How much energy does it take to make enough plutonium to emit 1000W (to start)? More like an atomic battery really. That depends on how you are producing the plutonium. Plutonium is generated inside uranium fission reactors and can be chemically extracted from spent uranium fuel rods—the PREVENTION...
by ijuin
Fri Feb 22, 2019 6:09 pm UTC
Forum: Science
Topic: What if the second law was breakable?
Replies: 71
Views: 2688

Re: What if the second law was breakable?

That's easy, we happen to live in one (http://www.preposterousuniverse.com/blog/2010/02/22/energy-is-not-conserved/). <reads> Brain: Ooooooohhhh noooooooo Well look here, SOMETHING has to be conserved. To give an analogy, quantum electrodynamics used to have electromagnetic charge as a conserved qu...
by ijuin
Wed Feb 20, 2019 8:57 pm UTC
Forum: News & Articles
Topic: Trump presidency
Replies: 8423
Views: 737972

Re: Trump presidency

The issue at hand here is that Trump is using the emergency as a method for overriding Congress when Congress has rejected his demands for funding.
by ijuin
Wed Feb 20, 2019 5:33 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2113: "Physics Suppression"
Replies: 23
Views: 2396

Re: 2113: "Physics Suppression"

Well, there are some constraints on when humanity could have arisen in the cosmic timeline. The Solar System formed when the universe was about nine billion years old, and it probably could not have produced an Earth-like planet if it had formed billions of years earlier, since there would not be su...
by ijuin
Tue Feb 19, 2019 6:38 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 2113: "Physics Suppression"
Replies: 23
Views: 2396

Re: 2113: "Physics Suppression"

I want to register my agreement with Randall re: the dark energy people. I was pretty happy about the Big Crunch, and the Big Rip was cool too, but the Big Freeze is really an annoying result. I want the universe to just keep going, you know ? The funny thing is that the Big Freeze is the scenario ...
by ijuin
Tue Feb 19, 2019 6:31 am UTC
Forum: News & Articles
Topic: Trump presidency
Replies: 8423
Views: 737972

Re: Trump presidency

Elections being suspended will probably be another bright line that would turn more Republicans outside Trump’s core base against him. It’s an act that pretty much says in so many words, “I do not care about democracy any more”. Considering that the two most intense wars that the USA fought (America...
by ijuin
Sun Feb 17, 2019 5:04 am UTC
Forum: News & Articles
Topic: Children can be Mentally Scarred when told they may be Shot to Death
Replies: 12
Views: 1118

Re: Children can be Mentally Scarred when told they may be Shot to Death

What would the psychological reaction for a generation (or two) be when raised in a world with a solid belief that instant death can happen with little to no warning at any time, erasing life as we know it on the planet after a furious exchange of nuclear weaponry? We have mostly achieved “fear fat...
by ijuin
Sat Feb 16, 2019 2:34 pm UTC
Forum: News & Articles
Topic: Children can be Mentally Scarred when told they may be Shot to Death
Replies: 12
Views: 1118

Re: Children can be Mentally Scarred when told they may be Shot to Death

The long-term problen is that making the children fearful may lead to some of them being in a state of perpetual fear where they lose the ability to function or start distrusting adults in general, or conversely that they get “fear fatigue” and simply shut down their fear response entirely in all si...
by ijuin
Sat Feb 16, 2019 2:28 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 2112: "Night Shift"
Replies: 33
Views: 2708

Re: 2112: "Night Shift"

Having flown across the Atlantic many times, I can agree that it is big. Very big. Jet airliners are very fast and it still takes them hours to get across. I don't know about the Pacific, though. I have seen the Pacific from California but I've never flown across. Everyone says it's much bigger tha...
by ijuin
Fri Feb 15, 2019 10:24 pm UTC
Forum: News & Articles
Topic: Children can be Mentally Scarred when told they may be Shot to Death
Replies: 12
Views: 1118

Re: Children can be Mentally Scarred when told they may be Shot to Death

However, the creation of such fear and paranoia did serve to advance the agenda of Cold War profiteers. . .
by ijuin
Fri Feb 15, 2019 2:49 pm UTC
Forum: News & Articles
Topic: In other news... (humorous news items)
Replies: 15108
Views: 2521057

Re: In other news... (humorous news items)

At the largest scale, the main distinction between corporations and organized crime is that government hasn’t banned the things that the corporations are doing.
by ijuin
Wed Feb 13, 2019 6:48 am UTC
Forum: News & Articles
Topic: In other news... (humorous news items)
Replies: 15108
Views: 2521057

Re: In other news... (humorous news items)

If they don’t want people gawking into their apartments, then I hear that there’s this marvelous invention called “curtains” that they could use.
by ijuin
Wed Feb 13, 2019 6:42 am UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 191
Views: 34249

Re: Science fleeting thoughts

What the whole thing resembles to me is a Musk-style HyperLoop system, but with the tube being transparent rather than opaque. Aluminum oxide crystal would be a more than adequate material.
by ijuin
Mon Feb 11, 2019 11:06 am UTC
Forum: News & Articles
Topic: In other news... (humorous news items)
Replies: 15108
Views: 2521057

Re: In other news... (humorous news items)

What is this Gillick standard? It appears to be British legal terminology that is not shared by other legal systems. Anyway, in the USA, unemancipated minors generally have no right to defy the will of their legal guardian(s) unless said guardians are engaging in legally defined abuse of said minor....
by ijuin
Mon Feb 11, 2019 10:50 am UTC
Forum: News & Articles
Topic: The Darker Side of the News
Replies: 4393
Views: 642427

Re: The Darker Side of the News

Also there's a big difference between boycotting companies from a country due to its foreign policies, and discriminating against people from that country. The government is not one and the same as the people. It is perfectly possible to oppose a government without holding malice toward its citizen...
by ijuin
Thu Feb 07, 2019 1:38 am UTC
Forum: Individual XKCD Comic Threads
Topic: Re: 2107: "Launch risk"
Replies: 16
Views: 2257

Re: 2107: "Launch risk"

Sharks don’t breathe air anyway. They breathe water. There is no liquid water in space.
by ijuin
Wed Feb 06, 2019 1:33 am UTC
Forum: Individual XKCD Comic Threads
Topic: Re: 2107: "Launch risk"
Replies: 16
Views: 2257

Re: 2107: "Launch risk"

you're less likely to die from a space launch than from a shark attack. Cause, y'know, everything else about space travel aside from the launch is perfectly simple and safe. 100% of spaceflight deaths to date have happened either during the launch phase or the entry/landing phase. Nobody has yet di...
by ijuin
Sat Feb 02, 2019 4:45 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2106: "Sharing Options"
Replies: 22
Views: 2526

Re: 2106: "Sharing Options"

Perhaps more pertinent than giving your information to hostile foreign governments: also giving your information to a hostile domestic government, which tends to be in a stronger position to exploit it. That’s ridiculous—we ALL know that domestic governments are never hostile, right? *looks around ...
by ijuin
Thu Jan 31, 2019 9:46 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2104: "Biff Tannen"
Replies: 42
Views: 5311

Re: 2104: "Biff Tannen"

No, the MOST disturbing part is that building and operating such a plant is expected to generate a profit. Just who is buying thousands of tons of dioxin per year? Is President Nixon perhaps planning to finally win the Vietnam War by spraying it onto the Viet Cong’s croplands?
by ijuin
Wed Jan 30, 2019 3:12 am UTC
Forum: Science
Topic: Can a thruster using geomagnetic fields and superconductors generate a thrust?
Replies: 9
Views: 1320

Re: Can a thruster using geomagnetic fields and superconductors generate a thrust?

AFAIK it will generate lift, but not enough to overcome Earth’s gravity if it has to lift its own power source. If the area of ​​the geomagnetic field convergence layer is large, use it to increase the geomagnetic field by 100-1000 times, if the coil uses a superconductor material and a larger curr...
by ijuin
Tue Jan 29, 2019 3:28 pm UTC
Forum: Science
Topic: Can a thruster using geomagnetic fields and superconductors generate a thrust?
Replies: 9
Views: 1320

Re: Can a Thruster that uses geomagnetic fields and superconductors generate lift?

AFAIK it will generate lift, but not enough to overcome Earth’s gravity if it has to lift its own power source.
by ijuin
Mon Jan 28, 2019 11:36 pm UTC
Forum: Serious Business
Topic: More efficient airplane boarding protocols
Replies: 79
Views: 18258

Re: More efficient airplane boarding protocols

The most effective means of speeding boarding would be simply to have multiple boarding points instead of having everyone boarding through a single hatch. Having passengers board through the rear hatches as well as the front would nearly double boarding rates, though it would require a dual gangway.
by ijuin
Mon Jan 28, 2019 8:12 am UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 191
Views: 34249

Re: Science fleeting thoughts

Ok, most cells only keep enough ATP (the molecule used for on-the-spot energy delivery within cells) on hand to last for ten seconds at most. This can be supplemented by creatine phosphate stores, but that too will run out after another ten to thirty seconds. After that, cells turn to anaerobic ferm...
by ijuin
Sun Jan 27, 2019 7:44 am UTC
Forum: News & Articles
Topic: Police misbehavior thread
Replies: 6557
Views: 1044738

Re: Police misbehavior thread

Whether they get life or death, my first concern is that they never walk free again.
by ijuin
Sun Jan 27, 2019 2:04 am UTC
Forum: Science
Topic: Consequences of climate change
Replies: 90
Views: 21427

Re: Consequences of climate change

The problem with methods of internalizing those external costs (e.g. via tradable carbon credits) is that the people who don’t want to pay for it (largely because they would need to buy the largest amount of them) have sufficient power to block the enforcement of such a system to begin with.

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