## Search found 84 matches

Wed May 08, 2019 2:02 am UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 6777

### Re: Is it possible to escape from a black hole using another black hole?

Here's an article about exactly this question. There's a video there of a simulated collision between black holes. The horizons do "reach out" to touch ahead of the collision, Great article! It says that 5 percent of the combined mass is radiated away as gravitational waves which got me w...
Tue May 07, 2019 1:41 am UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 6777

### Re: Is it possible to escape from a black hole using another black hole?

What the OP's question suggested to me is two co-orbiting black holes with equal mass, some time before they coalesce, but after the event horizons overlap. If you could manage to aim you ship in along such a path that you remained equidistant from the black holes, could you get through the overlap...
Mon Apr 29, 2019 1:20 am UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 6777

### Re: Is it possible to escape from a black hole using another black hole?

You carelessly dropped your probe past an event horizon. No amount of acceleration can allow it to escape. Your first idea is thus to try accelerating it, via a nearby gravitational source. Why exactly is that supposed to help? Looking at simulations of black hole mergers , it appears as if the are...
Sun Apr 28, 2019 8:18 pm UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 6777

### Re: Is it possible to escape from a black hole using another black hole?

I'm imagining a one time fly by where the black holes end up traveling away from each other rather than in orbit. Is there a theorem that if their event horizons overlap they must combine with rather regardless of velocity? It seems like an escape should be theoretically possible as long as the cent...
Sun Apr 28, 2019 5:00 pm UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 6777

### Re: Is it possible to escape from a black hole using another black hole?

What the OP's question suggested to me is two co-orbiting black holes with equal mass, some time before they coalesce, but after the event horizons overlap. If you could manage to aim you ship in along such a path that you remained equidistant from the black holes, could you get through the overlap...
Sat Apr 27, 2019 4:57 pm UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 6777

### Is it possible to escape from a black hole using another black hole?

If a probe entered a blank hole event horizon, then immediately after, the black hole passed by another black hole in such a way that a pocket of reduced gravity is created in the section of the event horizon where the probe is located, would be possible for the probe to surf that gravity pocket and...
Sat Nov 17, 2018 6:38 pm UTC
Forum: Science
Topic: Proprioceptive string microscopy
Replies: 10
Views: 3871

### Re: Proprioceptive string microscopy

My original thought when I first found this thread (NPI!) unanswered was that maybe an optical fibre thread could, bowed by the pressure of the changing surface topography it was forced at an angle against, produce a readable change of bounced-through-and-back light according to how it is disturbed...
Thu Nov 15, 2018 3:17 pm UTC
Forum: Science
Topic: Proprioceptive string microscopy
Replies: 10
Views: 3871

### Re: Proprioceptive string microscopy

Detecting the roughness of a surface by touching it isn't proprioception, that's touch. Proprioception is a sense that uses nerves in muscles, tendons, and joints to determine the relative orientation of your head, body, and all your limbs and digits. Pretty much by definition, you can't use propri...
Wed Nov 14, 2018 7:33 am UTC
Forum: Science
Topic: Proprioceptive string microscopy
Replies: 10
Views: 3871

### Proprioceptive string microscopy

Proprioception is generally thought of as an organism's ability to sence the relative positions of its body parts. I am interested in the applicability of this type of internal displacement sensing to scientific measurement. To do this I propose the proprioceptive string, a device that modulates EM ...
Mon Mar 19, 2018 1:07 am UTC
Forum: Serious Business
Topic: Will there be a large US recession in the next 5 years?
Replies: 21
Views: 11579

### Re: Will there be a large US recession in the next 5 years?

Not sure there's any reason for a US recession in the next five years either, especially with Trump's giveaway. Trouble is definitely being stored up for the future though. Economic stimuli like the tax cuts boost in the short term but leave nothing in the bank when the inevitable recession does hi...
Sun Mar 18, 2018 6:02 am UTC
Forum: Serious Business
Topic: Will there be a large US recession in the next 5 years?
Replies: 21
Views: 11579

### Re: Will there be a large US recession in the next 5 years?

The five year timescale is one I made up for the purpose of discussion. There will always be another recession eventually but 5 years seems like a reasonable period for making meaningful predictions.
Sat Mar 17, 2018 8:50 pm UTC
Forum: Serious Business
Topic: Will there be a large US recession in the next 5 years?
Replies: 21
Views: 11579

### Re: Will there be a large US recession in the next 5 years?

I don't think he believes gold is a good investment because it would hold value in a post apocalyptic world. The idea is that runaway inflation could make investments that are backed by US dollars and US buying power riskier, and since gold is immune to inflation its value as a store of value will i...
Sat Mar 17, 2018 6:25 pm UTC
Forum: Serious Business
Topic: Will there be a large US recession in the next 5 years?
Replies: 21
Views: 11579

### Will there be a large US recession in the next 5 years?

I've been listening to some of Peter Schiff's podcasts. He has a foreboding view of the US's economic future. To summarize my take aways from listening to him: 1. The budget deficit is growing while at the same time the trade deficit increases US debt held in foreign countries. 2. Because of that th...
Mon May 01, 2017 10:13 am UTC
Forum: Serious Business
Topic: How would you change the U.S. tax system?
Replies: 197
Views: 71378

### Re: How would you change the U.S. tax system?

1A: Capital to be adjusted for inflation, i.e., you buy a house for 100k and sold for 500k, but 100k is now worth 200k, you are taxed in the 300k not the 400k. 1B: Dividends to be tax deductible for the corporation, to avoid "double taxation" It seems like the inflation adjustment would m...
Sun Apr 30, 2017 7:14 am UTC
Forum: Serious Business
Topic: How would you change the U.S. tax system?
Replies: 197
Views: 71378

### How would you change the U.S. tax system?

Since there is a lot of debate about tax reforms going on in the U.S. right now I'm interested in discussing what the ideal tax reforms would be. Here's my proposal which is aimed at stimulating the economy while decreasing wealth inequality. Looking forward to hearing about all the problems with it...
Sun Apr 23, 2017 5:43 pm UTC
Forum: Mathematics
Topic: Alien Mathematics: A Math System Beyond our Comprehension?
Replies: 24
Views: 9167

### Re: Alien Mathematics: A Math System Beyond our Comprehension?

I have another alien math story to recommend, The Opposite and the Adjacent by Liu Yang:
http://clarkesworldmagazine.com/liu_09_16/

As a suggestion for a premise, how about aliens with brains that function in some part like quantum computers so they percieve numbers as superpositions.
Sun Feb 19, 2017 5:21 pm UTC
Forum: Serious Business
Topic: Voting on government spending via taxs
Replies: 25
Views: 12003

### Re: Voting on government spending via taxs

This is why it can't all just be a 'popularity contest' - we need experts to decide where society's money is best spent, and often that involves long term planning and investment. Thus (in theory) we elect wise politicians who listen to wise experts to make such decisions. That's the part of the pr...
Sun Feb 19, 2017 7:00 am UTC
Forum: Serious Business
Topic: Voting on government spending via taxs
Replies: 25
Views: 12003

### Re: Voting on government spending via taxs

There could be a wisdom of the crowds type of effect (for example: http://www.npr.org/sections/money/2015/08/07/429720443/17-205-people-guessed-the-weight-of-a-cow-heres-how-they-did) that allows uncoordinated masses to arrive at allocations that are just as good as the experts. That sounds more li...
Thu Feb 16, 2017 2:44 pm UTC
Forum: Serious Business
Topic: Voting on government spending via taxs
Replies: 25
Views: 12003

### Re: Voting on government spending via taxs

Do you mean you have to pick specific ones or can you say "use it however" because in the second case most of the time it probably wouldn't change much (you basically only have to change your normal budget if the amount bookmarked only for a specific rubric is larger than you intended to ...
Thu Feb 16, 2017 10:15 am UTC
Forum: Serious Business
Topic: Voting on government spending via taxs
Replies: 25
Views: 12003

### Re: Voting on government spending via taxs

Complex policies should be determined by professionals. How do I know if how much money should go to education, how much to defense, how much to the justice department? Do I have any idea how much a detective makes, and should they be making more? Absolutely not. I should elect people whose positio...
Mon Feb 06, 2017 10:51 am UTC
Forum: Serious Business
Topic: Voting on government spending via taxs
Replies: 25
Views: 12003

### Voting on government spending via taxs

I propose allowing tax payers to allocate how their tax dollars are spent by designating sectors of the government like military, education, transportation, etcetera on their tax forms. This could be gradually phased in to avoid causing havoc. To test the proposal, control of only a small fraction o...
Fri Jan 27, 2017 9:30 am UTC
Forum: News & Articles
Topic: Trump presidency
Replies: 8726
Views: 933333

### Re: Trump presidency

Trump has been claiming that by participating in bilateral trade deals instead of regional agreements like NAFTA and TPP the US will be able to negotiate deals that benefit it more. Is this a reasonable claim? I would like to better understand the theory behind his position. Why would countries ever...
Thu Nov 10, 2016 12:05 pm UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 1190939

### Re: 2016 US Presidential Election

http://www.foxbusiness.com/markets/2016 ... today.html

Based on the way corrections corp's stock responded to the Trump's election, it looks like investors expect him to support the use of for-profit prisons.
Wed Oct 05, 2016 11:37 am UTC
Forum: Serious Business
Topic: Should We Try Solar Radiation Management?
Replies: 89
Views: 22295

### Re: Should We Try Solar Radiation Management?

@EMPT Governments are already attempting to limit CO2 emissions. SRM programs are not being undertaken, even though they are far cheaper per degree of heating averted. What? That is totally news to me. Source? From the top of my head I can name about ten ways to decrease/limit CO2 emissions that I ...
Sat Oct 01, 2016 7:01 pm UTC
Forum: Serious Business
Topic: Should We Try Solar Radiation Management?
Replies: 89
Views: 22295

### Re: Should We Try Solar Radiation Management?

@EMPT Governments are already attempting to limit CO2 emissions. SRM programs are not being undertaken, even though they are far cheaper per degree of heating averted. SRM need not be applied to completely negate warning. If it is only applied partially to slow the warming expected to happen over th...
Wed Sep 28, 2016 4:04 am UTC
Forum: Serious Business
Topic: Should We Try Solar Radiation Management?
Replies: 89
Views: 22295

### Re: Should We Try Solar Radiation Management?

Starting a limited time stratospheric sulfate trial in an area over the oceans would allow us to better assess the trade-offs involved in a large scale operation and minimize the damage climate change will cause. Is this possible? To contain a trial to a particular region? Aerosols cannot be comple...
Mon Sep 26, 2016 7:18 pm UTC
Forum: Serious Business
Topic: Should We Try Solar Radiation Management?
Replies: 89
Views: 22295

### Re: Should We Try Solar Radiation Management?

The activities that lead to anthropogenic global warming are not evidence of the perils of climate engineering because they were performed without regard for their effects on the climate. The the rise in sea-level that sulfate aerosols could reduce/slow will probably lead to far worse casualties and...
Fri Aug 12, 2016 6:20 am UTC
Forum: Serious Business
Topic: Should We Try Solar Radiation Management?
Replies: 89
Views: 22295

### Re: Should We Try Solar Radiation Management?

Sorry, I had some bad information about the possibility of a runaway greenhouse effect. Upon further research: What my results show is that if you put about ten times as much carbon dioxide in the atmosphere as you would get from burning all the coal, oil, and gas—about 30,000 parts per million—then...
Tue Aug 09, 2016 5:37 am UTC
Forum: Serious Business
Topic: Should We Try Solar Radiation Management?
Replies: 89
Views: 22295

### Should We Try Solar Radiation Management?

My position is that governments should immediately start solar radiation management programs using aresols and cloud seeding to stabilize global temperature. Global warming is expected to displace populations through sea level rise, cause food supply issues through desertification, and cause extinct...
Fri Sep 26, 2014 9:19 am UTC
Forum: Science
Topic: Quantum Locking Space Elevator
Replies: 7
Views: 3168

### Re: Quantum Locking Space Elevator

Both designs are were intended to keep the superconductor panels in orbit because it's easy to keep them cold in space. I only now realize the second design could be used from ground level (that seems to be the way you interpreted it). The scenario I had in mind for the second design was to build a ...
Thu Sep 25, 2014 2:51 am UTC
Forum: Science
Topic: Quantum Locking Space Elevator
Replies: 7
Views: 3168

### Re: Quantum Locking Space Elevator

Another more elevator like design would be to create something like this where pairs of superconducting panels are activated as they are moved up a shaft using solar powered motors. O O < motor turns a belt with the super conducting panels attached | |---- ----| | | | | | | =========== | < structura...
Wed Sep 24, 2014 3:06 pm UTC
Forum: Science
Topic: Quantum Locking Space Elevator
Replies: 7
Views: 3168

### Re: Quantum Locking Space Elevator

Cables are limited in length by their weight to strength ratio. If the cable becomes too long its own weight will create so much tension that it will snap. Carbon nano-tubes are a promising technology in this area, but I don't think anyone has succeeded in making them long enough yet. Also, catching...
Wed Sep 24, 2014 2:02 pm UTC
Forum: Science
Topic: Quantum Locking Space Elevator
Replies: 7
Views: 3168

### Quantum Locking Space Elevator

Is quantum locking is powerful enough to build a space elevator? Here's one scenario for how it could be done: 1. Put a giant superconducter panel into orbit (I hear the thickness doesn't matter so it could potentially have a very large area without being too heavy). 2. Fly a shuttle carrying a powe...
Wed Jul 30, 2014 11:15 am UTC
Forum: Science
Topic: Does the universe have "Garden of Eden" configurations?
Replies: 24
Views: 6382

### Does the universe have "Garden of Eden" configurations?

In cellular automatons Garden of Eden patterns are states that cannot be reached from any other possible state. For more info see: https://en.wikipedia.org/wiki/Garden_of_Eden_(cellular_automaton) This has made me curious about whether there are valid physical states in the universe that cannot occu...
Mon Jul 21, 2014 5:33 am UTC
Forum: Science
Topic: Why is cosmological inflation necessary?
Replies: 15
Views: 4114

### Re: Why is cosmological inflation necessary?

What in a QFT would you want to dynamically change in order to have the effect of changing the cross section? Which interactions would you change the cross section for? All of them, by the same rate? How? I don't know enough about QFT to say. To redress the questions I'm trying to get at, I've read...
Mon Jul 21, 2014 4:40 am UTC
Forum: Science
Topic: How do gravitational waves form?
Replies: 11
Views: 2791

### Re: How do gravitational waves form?

There is, but, how's your intuition for a dipole moment? "Intuition" is very tricky. Is general relativity intuitive? It certainly can be, but after you do the differential geometry pounding. A little harder to say you intuit it in advance the way you can intuit Newtonian mechanics based ...
Mon Jul 21, 2014 4:31 am UTC
Forum: Science
Topic: Why is cosmological inflation necessary?
Replies: 15
Views: 4114

### Re: Why is cosmological inflation necessary?

Well, the age of the universe is pretty well established experimentally, so the time between the surface of last scattering and the Big Bang certainly can't be infinite. The redshift of the CMB can be measured (apparently it's z = 1091 +/- 1), so we can figure out the time difference between the ag...
Mon Jul 21, 2014 4:27 am UTC
Forum: Science
Topic: How do gravitational waves form?
Replies: 11
Views: 2791

### Re: How do gravitational waves form?

Is there an intuition or analogy that describes how quadrupole moments behave or do they require running a simulation to visualize the wave formation?
Sun Jul 20, 2014 3:02 pm UTC
Forum: Science
Topic: Why is cosmological inflation necessary?
Replies: 15
Views: 4114

### Re: Why is cosmological inflation necessary?

I think it's simpler because it doesn't introduce a new type of physical phenomenon. We know with a pretty high level of certainty that the universe is currently expanding and it would be simpler if we could find a way to use the same phenomenon to explain the formation of the early universe. The st...
Sun Jul 20, 2014 11:58 am UTC
Forum: Science
Topic: How do gravitational waves form?
Replies: 11
Views: 2791

### How do gravitational waves form?

Events like neutron star inspirals and cosmic inflation are said to create gravitational waves. Is there a simple physical principal that explains why they form?

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