Films
I saw Moon, which was a very nice bit of old-school sci-fi with a few nice ‘ah-ha!’ moments.
I saw G-Force 3D, and was amazed at how special effects clearly follow some kind of Moore’s law, while good writing remains a nearly insurmountable challenge.
Link
There’s a few sites out there attempting to keep up with what’s referred to as the Daily Mail’s “ongoing effort to classify every inanimate object into those that cause cancer and those that prevent it.” I like the way this one is helpfully laid out.
Of course, what would be nicer would be to use the research papers as a basis for such a project rather than the Daily Mail, at which point you’d probably need better risk-assessment functionality.
For example, I read a proposal to break global warming down to an individual scale – so if collective human actions increase the average temperature by 0.5 degrees over several decades, we could create an approximation for the temperature increase due to the production of any given product or action, and even though it would be tiny it would come to have meaning – e.g. this laptop causes a 23 picokelvin rise, but this one caused 573.
In practice, we’ve seen Carbon labelling, which is I suppose somewhat more accurate and tangible.
Unfortunately risk factors are really too complicated to be distilled to a single number for a single food item.
Video
Bobby McFerrin with a nice demonstration about how intuitive the Pentatonic scale is:
Last week’s puzzle
Why is gravity 37% that of Earth’s on Mars, even though Mars only has 11% of the Earth’s mass? Clearly there are Laws Of Physics at work, and we can’t fairly expect to have an intuitive understanding of how strong gravity ‘ought’ to be on planetary scales.
That said, there are two factors clearly at work:
– Density: Mars is slightly less dense than the earth – 3.9g/cm^3 vs 5.5 g/cm^3, or 71%
– Radius: Mars’ radius is 53% that of Earth’s. If you were somehow standing on a platform one earth radius away from the centre of Mars, the gravity you feel would certainly be weaker than the 37% that you would experience on the surface.
(Side note: if earth (or indeed any planet) were hollow, there would be no gravity on the inside, as the gravitational pull due to the outer shell cancels out no matter where you are in the interior!)
This week’s puzzle
Why are about 10% of people left-handed?
Quote
The Week is a weekly summary of “everything you need to know about everything that matters”, expertly editing together coverage of the main stories of the week into coherent, balanced, and concise summaries.
Here’s a cut down version of their concise version of a story from Germany, which as well as cutting all the fluff from a story that could probably be expanded to a movie adaptation I also liked because it’s a wonderful case of reversing the usual fiction trope that ‘Police are Useless’
“Germany’s wealthiest woman, Susanne Klatten hit the headlines last year when her former lover was arrested for trying to extort €49m from her. He told Klatten that he had made a secret video of them having sex and threatened to make it public unless his demands were met. But Klatten went to the police and he was arrested.
“Last month, three men wrote a letter to Klatten in which they claimed to have a copy of the sex video and demanded €800,000 and a BMW car for its return. Once again Klatten called the police and the three were arrested.”
Okay, it probably wouldn’t make a very good movie.
Video
The effect of music on the brain is a very interesting thing that varies tremendously by individual. Last year I discovered a track that has an incredibly powerful mood-altering effect on me: Olympians, by a band with a potentially offensive name. It took a couple of initial slightly bemused listens before it properly seeped into my brain, but now as soon as I hear this track, I feel unbelievably positive, and become filled with an absurd confidence.
Unfortunately I suspect the fact that this track is so resonant for me also suggests that it’s very specific, and it will seem really quite boring to most others. But I find it so amazing I just have to share it anyway. So first, here’s a short version with a video to slightly entertain you while you wonder what on earth I’m going on about:
And if you are so inclined, here’s the full length version:
Tim Link
I saw The Lion King in 3D at Edinburgh International Film Festival, and reviewed it here. The short version of my review would essentially be this:
Quote special: Misleading Impressions
Thanks to Last.fm recommendations I discovered Brian Transeau (BT)’s album This Binary Universe, which turns out to be a bit different to his other albums. As I listened to his back-catalogue I thought I detected an incredible sense of optimisim and positivity. When I later found Brian Transeau was on Twitter, I found this impression was entirely correct. Sample tweet:
5am and time for our first ever sunrise, father daughter bike ride. Today is already #WIN Good Morning!
My favourite musician is probably Jon Hopkins who I now listen to instead of any other Chill Out music since for me he somehow trumps pretty much the entire genre. He is behind some of the most relaxing and beautiful tracks I know, so I was curious to see what he was like on Twitter. The answer: actually a bit different. Brilliantly, this was the first Tweet of his that I read:
I wish one of James May’s Big Ideas was to FUCK OFF
Finally, moving away from music, I referenced Mitch Hedberg’s famous escalator line in my Lion King 3D review:
An escalator can never break – it can only become stairs.
Realising I was unfamiliar with his work, I ended up reading through his Wikiquote page, and found much to like, such as:
My belt holds up my pants and my pants have belt loops that hold up the belt. What the fuck’s really goin on down there? Who is the real hero?
and:
When you go to a restaurant on the weekends and it’s busy they start a waiting list. They start calling out names, they say “Dufresne, party of two. Dufresne, party of two.” And if no one answers they’ll say their name again. “Dufresne, party of two, Dufresne, party of two.” But then if no one answers they’ll just go right on to the next name. “Bush, party of three.” Yeah, what happened to the Dufresnes? No one seems to give a shit. Who can eat at a time like this? People are missing! You fuckers are selfish. The Dufresnes are in someone’s trunk right now, with duct tape over their mouths. And they’re hungry. That’s a double whammy. Bush, search party of three, you can eat when you find the Dufresnes.
So after that I naturally looked him up on YouTube, and at that point discovered him to be completely different to what I had imagined:
http://www.youtube.com/watch?v=2491LucLa1g
Gone, try this one:
Picture
A lot of infographics annoy me, but I like the idea of bringing together the data that drives this one so much I don’t mind its shortcomings.
Puzzle – The Two Envelopes
I can’t believe I haven’t put this one in Things before.
In a standard abstract setting with no distracting details, you and another person are presented with two envelopes. One envelope contains some money (but you don’t know how much). The other envelope contains twice as much money. You get to select an envelope, and you get to keep however much money is in it. The other person gets the other envelope. There isn’t anything to go on, so you choose one of the envelopes for arbitrary reasons.
Before you get to open it, you are offered the chance to change your mind, with the following reasoning:
You don’t know how much money is in your chosen envelope, but for the sake of argument let’s say it’s £10. That means you either have the envelope with twice as much money (so the other contains £5) or you don’t (so the other must contain £20). So if you decide to swap, there’s a 50% chance you get that £5, and a 50% chance you end up with the £20. Since you currently have £10, that means there’s a 50% chance of effectively losing £5 and a 50% chance of gaining another £10. Imagine if the universe split into two at the moment you made that decision – one of you loses £5, the other gains £10, so on average you gain (£10 + (-£5) )/2 = £2.50. Since the average gain is positive, clearly that’s a gamble worth taking, and you should definitely swap.
This is of course a strange conclusion. You effectively chose an envelope at random, so how does swapping it improve your odds of getting more money? The paradox is even more stark if we consider the fact that the other person could be convinced to swap by exactly the same argument.
Previous Puzzle – Co-operating with yourself
Last time I asked how well you would get on with yourself.
Xuan said:
They say that people you dislike/hate are likely to be people who’s characteristics are most like yours. People are most critical of what they see in the mirror. My clone better not have the same taste in clothes.
Which reminded me of a problem the sci-fi stories don’t tend to go into – if there’s suddenly two of you, you’re going to need some more clothes, and one of you will probably have to find another job, and probably somewhere else to live. Marriages get complicated. Phil suggested David Gerrold’s time-travel sci fi story The Man Who Folded Himself for an in-depth dissection of this kind of problem.
Richard observed that he tends to like people with whom he shares attractive personality traits, and dislike those that share his negative personality traits, suggesting that the latter may be because they serve as a reminder of these aspects of himself. This potentially makes the question even harder to answer, although one might guess that a negative would trump a positive and ultimately lead to the kind of confrontations that usually crop up in sci-fi versions of this problem (and endorsing Xuan’s observation).
I think the question raised by The Man Who Folded Himself of co-operating with a version of yourself in the future is a clue to how we can actually ask this question of ourselves. In a very real sense, we really do choose how much to co-operate with our future selves every day: will you do a chore now, or will you force your future self to do it instead? Will you eat all of the cake, or will you save some for your future self? If you know how you generally answer those questions, I suggest this gives you an idea of how well you would get on with yourself.
In practical terms, just thinking of these kinds of questions in this framework makes me more likely to co-operate with my future self, which is probably a good thing. Well, I’m glad that my past self thinks that way, anyway.
It’s Christmas and Things has been running for over a year. I’m taking that as an excuse to break with the usual format, and also to highlight what I (and some others) consider to be the best of the year’s Things.
Urgent matters first I bought 10 tubs of Celebrations chocolates, discovered the average distribution of the different types, then created tubs of each kind and put them on eBay for charity to determine their value. I wrote up the initial results in my new blog:
[It’s long over now, read the final results here – T.M. 22/1/11]
Videos
Here are some videos that I like.
1) Tim ‘Speed’ Levitch is an extraordinary fellow that speaks in paragraphs that would take most other people hours to come up with. In the following video he holds forth on the New York grid plan and builds to a brilliant conclusion.
To sell you his style just a bit more, here’s his spontaneous introduction to a comment on a homeless person he passes while walking down the street: “[that person], under the white comforter, cuddled up with 34th street and Broadway, existing on the concrete of this city, hungry and dishevelled, struggling to crawl their way onto this island, with all of their machinated rages and hellishness and self-orchestrated purgatories…”
2) Somebody put a few frames of an anime featuring a woman spinning a leek around to a brilliantly loopy sample from an obscure band. A massive internet meme was born. Here’s where it all started (reposted).
Video Acoustic Resonance – rice is used to illustrate standing acoustic waves on what I presume is a metal plate:
Picture Analemma (click for big):
If you don’t know what an Analemma is, try to work it out from the photo.
Puzzle The rainbow paradox, remains one of my favourite and (as far as I am concerned) unresolved puzzles:
Soundwaves can vary in frequency across a vast range, part of which we can hear. The lowest part we perceive as a deep bass, the highest as a high squeak.
Similarly, the electromagnetic spectrum consists of a vast range of frequencies, a small range of which we are able to see. The lowest frequency we can see is what we call red, and the highest frequency is what we call violet.
However, while we perceive the ends of the audible sound spectrum to be very different, the ends of the visible light spectrum, red and violet, seem very close to one another, and we even have a colour we call purple that is a mix of the two yet does not actually appear anywhere in the spectrum between them. In fact, we can draw a circle of the colours we perceive and it is not at all clear where the ‘ends’ are.
Films
I really enjoyed City of Ember, but I have to admit this is probably because I love films about things that are underground or the end of the world or mechanical contraptions, all of which it has.
I’m going to try to see Eagle Eye because it looks like it might hold my attention with a combination of a moderately creative idea and a lot of explosions.
Trailer:
IMDb: 6.9/10
RT: 28%… but critics never like this sort of thing!
Also of course there’s Quantum of Solace which is out next Friday.
Puzzle from before
In Things 30 I asked why we look after the ‘least fit’ despite the fact that we evolved through ‘survival of the fittest’. A lot of people turn this around and use it as an argument that we shouldn’t look after the weak, which is ridiculous for a number of reasons, but most of all it is ridiculous because of the answer to this puzzle.
The trick is that evolution optimises for survival of genes, not individuals, and individuals tend to share a lot of genes. Helping the ‘least fit’ is nothing more than a strategy that evolution tried out and turns out to have been extremely successful. Anyone advocating the ‘kill the weak for survival of the fittest’ argument needs to explain how it is humans have managed to thrive across the entire planet by being nice to their fellow tribe-members.
This week’s puzzle
Last weekend I drove a hire car from Edinburgh to Cardiff. As it got dark, other drivers started flashing their lights at me, even though I had my lights on. I pulled over and checked the lights – they were all on, front and back. What was the problem?
A video
The stop/go cat I linked to in Things 30 has become a massive viral hit. Here’s another one – literal lyrics put to the legendary Take On Me music video:
