Search found 194 matches

by quantropy
Sat Apr 16, 2011 2:12 pm UTC
Forum: News & Articles
Topic: The Thread To Remind Me We're Living In The Future
Replies: 1932
Views: 400894

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

1: Quantum teleportation is possible 2: Quantum theory is either nonlocal or closely related to consciousness (Bell's theorem (my version)) 3: There is no evidence for nonlocal transmission of information 4: Quantum theory has a no-cloning theorem Conclusion: Transportation of consciousness is possi...
by quantropy
Thu Mar 24, 2011 10:31 am UTC
Forum: Science
Topic: torque-free motion of a rigid body
Replies: 0
Views: 1405

torque-free motion of a rigid body

In the wikipedia article on torque free motion of a rigid body, (http://en.wikipedia.org/wiki/Torque-free_precession) it suggests a way to the calculate the evolution of the object's orientation, but points out that this will lead to errors in the kinetic energy, which can then be corrected for. My ...
by quantropy
Wed Mar 23, 2011 5:53 pm UTC
Forum: General
Topic: Of Japan and Bananas.
Replies: 23
Views: 3609

Re: Of Japan and Bananas.

Earthquake or bananas, the effects of radioactivity are likely to be the least of your worries - there are other dangers of eating too many bananas. http://www.mirror.co.uk/news/weird-worl ... -21130644/
by quantropy
Sun Mar 20, 2011 6:16 pm UTC
Forum: Books
Topic: "The house of desires" by Kipling?
Replies: 2
Views: 1502

Re: "The house of desires" by Kipling?

Thanks for that - and now a search brings up this page at the top. Now that I know the correct title, I've found http://therumpus.net/2009/08/searching-the-library-of-babel/ which has a more thorough version of the list, with links to online copies of the stories where available. It seems that the K...
by quantropy
Sat Mar 19, 2011 6:23 pm UTC
Forum: Books
Topic: "The house of desires" by Kipling?
Replies: 2
Views: 1502

"The house of desires" by Kipling?

I've been reading The Total Library , a collection of essays by J.L. Borges. At the end he has lists of books (which can also be found at http://www.interleaves.org/~rteeter/grtborges.html). I've been going through this list, downloading any which are public domain. So I got to 20: Rudyard Kipling, ...
by quantropy
Thu Mar 17, 2011 1:38 pm UTC
Forum: Serious Business
Topic: Is a university degree in the UK worth the money?
Replies: 84
Views: 11358

Re: Is a university degree in the UK worth the money?

I understand what people are saying about following your passion and about university being fun in itself. That was certainly the case when I entered university in 1977, but I just wondered whether fees, and thinking of a degree in terms of an investment had changed this point of view. I think that ...
by quantropy
Wed Mar 16, 2011 8:07 pm UTC
Forum: Serious Business
Topic: Is a university degree in the UK worth the money?
Replies: 84
Views: 11358

Re: Is a university degree in the UK worth the money?

I suppose that what I'm really thinking is that in the past, sons of well off families would spend a few years at university in the same way as they might go travelling - it broadened their education, but wasn't specifically aimed at preparing them for a career. In a way it was a time of taking thin...
by quantropy
Wed Mar 16, 2011 5:15 pm UTC
Forum: Serious Business
Topic: Is a university degree in the UK worth the money?
Replies: 84
Views: 11358

Re: Is a university degree in the UK worth the money?

If it's a case of aversion to debt, then the arguments that poorer students should be subsidised from the fees paid by others. (http://www.bbc.co.uk/news/education-12665503) begin to look preposterous. Who is going to want to have a higher debt in order to subsidise another student (who will thus en...
by quantropy
Wed Mar 16, 2011 3:42 pm UTC
Forum: General
Topic: Has anyone ever called you a genius?
Replies: 85
Views: 11657

Re: Has anyone ever called you a genius?

being able to plug in a projector When I was running the university astronomical society, the slide projector often caused problems. I thought 'right, if one person learned how to deal with the projector, we wouldn't waste so much time trying to get it to work.' So I tried to take someone to take o...
by quantropy
Wed Mar 16, 2011 3:00 pm UTC
Forum: Serious Business
Topic: Is a university degree in the UK worth the money?
Replies: 84
Views: 11358

Re: Is a university degree in the UK worth the money?

I suppose that I'd better say that I didn't start this thread looking for advice, actually I was at university in 1980, and wanted to know whether people think that the nature of universities has changed since then. I know that loans are supposedly 'soft', and only need to be repaid when the borrowe...
by quantropy
Wed Mar 16, 2011 2:00 pm UTC
Forum: Serious Business
Topic: Is a university degree in the UK worth the money?
Replies: 84
Views: 11358

Is a university degree in the UK worth the money?

Looking at p3 of http://www.le.ac.uk/economics/to20/greenaway03.pdf shows that UK university participation increased from 13% in 1980 to 34% in 1999, with a target of 50% by 2010 (I think it's actually a bit above 40%). With the smaller number of students the state could afford to pay for them, now ...
by quantropy
Mon Feb 07, 2011 4:34 pm UTC
Forum: Science
Topic: How to effectively give a presentation on evolution
Replies: 36
Views: 5311

Re: How to effectively give a presentation on evolution

and finally evolution - OK it was tied to a some pretty dubious ideas when it was introduced, but it's moved on Which ideas were those exactly? Social Darwinism, eugenics and the like. The idea that 'survival of the fittest' justified inequalities in society. Stephen Jay Gould explained why evoluti...
by quantropy
Mon Feb 07, 2011 3:01 pm UTC
Forum: Science
Topic: How to effectively give a presentation on evolution
Replies: 36
Views: 5311

Re: How to effectively give a presentation on evolution

Another idea might be to give a presentation on some of the ideas which have been seen as part of the religion vs science debate and to debunk some of the myths surrounding them e.g. Atomism - dangerous atheistic doctrine Hey Galileo, what about parallax? Flat earth - hasn't been a mainstream viewpo...
by quantropy
Mon Feb 07, 2011 2:29 pm UTC
Forum: Science
Topic: How to effectively give a presentation on evolution
Replies: 36
Views: 5311

Re: How to effectively give a presentation on evolution

I've read quite a few books where the author seems to think that if they manage to present the evidence for evolution in a convincing enough manner, then it will force the creationists to change their minds - but it never seems to work. I would say that if you are trying to change peoples minds then...
by quantropy
Tue Feb 01, 2011 2:53 pm UTC
Forum: Science
Topic: Heat into work?
Replies: 33
Views: 3381

Re: Heat into work?

Just to add a thought: One of the major reasons papers like this get published is because of the review process. Reviewers are not gods of knowledge or ultra-experts. Papers are basically the cutting edge, and it is very difficult to get reviewers who are experts in obscure fields. How many people ...
by quantropy
Wed Jan 26, 2011 11:30 am UTC
Forum: Science
Topic: Heat into work?
Replies: 33
Views: 3381

Re: Heat into work?

Isn't it just a diode in the end? And hasn't everyone devised ways of breaking the second law of thermodynamics using a diode? The trouble is that hot diodes don't work properly. The effect of thermal noise always allows some reverse flow, and this cancels out the effect. Google 'Smoluchowski trapdo...
by quantropy
Wed Jan 19, 2011 10:27 am UTC
Forum: Fictional Science
Topic: The great photon disappearence act!
Replies: 14
Views: 6240

Re: The great photon disappearence act!

It's rather difficult to visualize, but spacetime is still 4 dimensional within the event horizon, but the radial direction now becomes the time dimension. That means there must be another space dimension orthogonal to the two spherical angle dimensions. That's presumably the direction the photon tr...
by quantropy
Thu Jan 13, 2011 6:21 pm UTC
Forum: Fictional Science
Topic: The great photon disappearence act!
Replies: 14
Views: 6240

Re: The great photon disappearence act!

if said lightbulb were to fall towards the black hole, it's no stretch of the imagination to say that there would atleast 1 photon whose velocity vector is direcly opposite to the gravitational vector. Once the lightbulb has crossed the event horizon this is no longer true, all paths lead to the si...
by quantropy
Thu Jan 06, 2011 3:28 pm UTC
Forum: Science
Topic: History of The Big Splat hypothesis
Replies: 3
Views: 750

History of The Big Splat hypothesis

Two or three years ago I read the book "The Big Splat or how our moon came to be" by Dana Mackenzie, which describes the Giant Impact Hypothesis for the formation of the moon from the impact of a Mars sized body. What really surprised me though, was that it became the consensus view for th...
by quantropy
Thu Jan 06, 2011 12:00 pm UTC
Forum: News & Articles
Topic: New edition of 'Huckleberry Finn' to lose the N-word
Replies: 131
Views: 13716

Re: New edition of 'Huckleberry Finn' to lose the N-word

So the word "slave" is to be used instead, giving the message that a slave is always a slave "really", even if he escapes to a new life, or is given his freedom. And this is supposed to be Basically Decent?
by quantropy
Tue Jan 04, 2011 4:36 pm UTC
Forum: News & Articles
Topic: Our Brains Are Shrinking. Are We Getting Dumber?
Replies: 54
Views: 5072

Re: Our Brains Are Shrinking. Are We Getting Dumber?

One hypothesis as to why we evolved large brains is that they act as an analogue computer in calculating the trajectory of thrown objects, and the bigger the brain, the more accurate the calculation. Now that we can use differential equations we no longer need such large brains. :roll:
by quantropy
Sun Jan 02, 2011 3:09 pm UTC
Forum: General
Topic: Micro Macro Phenomenon.
Replies: 16
Views: 2165

Re: Micro Macro Phenomenon.

The article is a total muddle My argument is supported by the Micro Macro phenomenon "Any act which is philanthropic or altruistic at the micro level can be catastrophic at the macro level. " He gives no evidence to support this 'phenomenon'. But whether X1>X+.07 is uncertain as it’s almos...
by quantropy
Tue Dec 28, 2010 3:26 pm UTC
Forum: General
Topic: Pronunciation, Spelling and Grammar. How important are they?
Replies: 50
Views: 5528

Re: Pronunciation, Spelling and Grammar. How important are t

In most cases, when something is written, it's meant to be read more than once. Poor spelling and grammar are likely to make it harder to read, so it seems reasonable that the writer should put a reasonable effort into making it correct, in order to save effort on the part of the readers. Also, we a...
by quantropy
Tue Dec 28, 2010 12:28 pm UTC
Forum: Forum Games
Topic: The Book Challenge
Replies: 261
Views: 22283

Re: The Book Challenge

Most have tried to change their speech in one way or another and would be sincerely complimented to be told that they do not sound like New Yorkers
by quantropy
Thu Dec 16, 2010 12:27 pm UTC
Forum: News & Articles
Topic: Amazon Book Banning (Again)
Replies: 42
Views: 4888

Re: Amazon Book Banning (Again)

The thing is that CreateSpace is part of Amazon, and so even if books are notionally 'Self Published', Amazon is seen as the publisher. A while ago a book apparently encouraging paedophilia was self-published using CreateSpace, and there was outrage directed at Amazon. They held out for a while, but...
by quantropy
Sat Dec 11, 2010 6:37 pm UTC
Forum: Science
Topic: Bell's theorem refuted!?
Replies: 90
Views: 13694

Re: Bell's theorem refuted

And quantropy - what does your website provide that the arxiv does not? Firstly, with arxiv you have to deal with the endorsement system. Whatever they say about it not being peer review, if you want someone who doesn't know you to endorse a paper then that is what it is likely to turn into. Second...
by quantropy
Sat Dec 11, 2010 1:18 pm UTC
Forum: Science
Topic: Bell's theorem refuted!?
Replies: 90
Views: 13694

Re: Bell's theorem refuted

I don't get what your purpose of this thread is. I think I can explain. The OP is finishing off a paper describing a refutation of Bell's theorem, which he plans to post in the Quantropy.org repository (which I run). The repository is set so that you can add a link to a discussion page, but at the ...
by quantropy
Wed Nov 17, 2010 10:28 am UTC
Forum: Books
Topic: Fearless Symmetry
Replies: 8
Views: 4957

Re: Fearless Symmetry

I read 'Fearless Symmetry' some time ago, but unfortunately I didn't write a review of it (which I do for most book that I read). If I remember correctly, I was impressed at how the author didn't try to teach the whole of undergraduate algebra in one book, but concentrated on giving definite example...
by quantropy
Tue Oct 26, 2010 4:22 pm UTC
Forum: Computer Science
Topic: Bees' brains and computers
Replies: 4
Views: 1337

Bees' brains and computers

Don't you just love the media. Apparently bees can solve the travelling salesman problem, which keeps computers busy for days (http://news.google.com/news/story?ncl=df0ob2id-x_yEEMgXA5NBYiwwptbM&hl=en&topic=t&ned=uk) And how many nodes did they test the bees on? 4 (http://www.journals.uc...
by quantropy
Fri Jul 02, 2010 5:23 pm UTC
Forum: Science
Topic: Calorific value of the typical person
Replies: 21
Views: 4560

Re: Calorific value of the typical person

I guess a really obese person might get up to 1 Planck energy
by quantropy
Wed May 05, 2010 10:05 am UTC
Forum: Science
Topic: FTL-com without breaking *too* many laws of physics
Replies: 45
Views: 6646

Re: FTL-com without breaking *too* many laws of physics

That's what fixing a universal reference frame would do. The problem is that to an observer moving relative to this frame, it would still appear as though some communications had gone back in time, and thus be very difficult to reconcile that with the "fact" that they hadn't actually done...
by quantropy
Sat May 01, 2010 6:02 pm UTC
Forum: Science
Topic: FTL-com without breaking *too* many laws of physics
Replies: 45
Views: 6646

Re: FTL-com without breaking *too* many laws of physics

Why not have preferred frame of reference depending on the general distribution of mass in the system. Then if you needed to explain how the device works you could bring in EPR and Quantum Gravity.
by quantropy
Tue Apr 27, 2010 1:21 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0732: "HDTV"
Replies: 222
Views: 78174

Re: "HDTV" Discussion

I think it's a mistake to equate bigger screen with more immersive. It's more like bigger screen = more ignorable. If I go for a walk, or go out to a (classical) concert, then I find I can think about things. Trying to just sit and think about things won't work - you just get bored and decide that y...
by quantropy
Sat Apr 05, 2008 1:51 pm UTC
Forum: Language/Linguistics
Topic: "Going Dutch"
Replies: 35
Views: 4923

Re: "Going Dutch"

A few hundred years ago the English and the Dutch were great rivals. Thus a lot of insulting terms relating to the Dutch were invented. One of these was 'Dutch Treat' - someone offers you a treat but then expects you to pay for it. Hence a situation where each person paid for themselves came to be k...

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