In previous posts I had mentioned that Furaha would appear in a film, hadn't I? Yes, I had; the proof is here, in a post of almost one year ago.
Well, the wait is almost over. Next Saturday the film will see its world première at the International Film Festival in Rotterdam. The director is David Verbeek, and the film is produced by Conijn Films. The film is in Chinese, but it is a Dutch film nevertheless. I will write more about it later. Meanwhile, here is the information from the website of the festival (right here):
"A young woman in Taipei is confronted with the blindness of her mother who is convinced she has a sixth sense. Shot with little facilities, but it is Verbeek’s most mature film - about uprooting, spirituality and modernity. Nominated for The Big Screen Award.
David Verbeek made this film on a tiny budget in the lull before his larger Dead & Beautiful had been fully financed. With its reflections on the role of spirituality in modern society, this film may be a precursor to his next, a socially critical vampire film.
But How to Describe a Cloud can stand on its own two feet. The story of Liling seems to unfold intuitively. When her mother goes blind, the young musician is suddenly forced to leave her big-city cocoon and return to the small island where she grew up. There, her scientific approach to blindness, in which she presents the world to her mother through words on the advice of the doctor, clashes with her old mother's spiritual approach. She argues that she can’t see the world around her any more, but can still sense it. Could the science fiction drawings of the former scientist with whom she flirts in the city provide mediation? Also see Immortelle in Tiger Awards Competition for Short Films."
Just guess who made the 'science fiction drawings of the former scientist'... To prove that, here is the film's trailer (there is a much better quality version on YouTube here).
Exciting, isn't it?
Monday, 21 January 2013
Sunday, 13 January 2013
Fragment from The Future is Wild
Getting back to the topic at hand, Petr asked what I thought of animals with just one leg. I realised that I had omitted walking with one leg or with no legs at all (whether the latter is possible may be a matter of semantics, but there are aspects of moving without legs that resemble those of true walking). Are there many such beasts in speculative fiction? The first one to come to mind is the 'desert hopper', an animal evolved from snails in 'The future is wild'. The DVD is easily available. There is also the Eponan springcroc; there are undoubtedly more.
What should be the proper term for this mode of locomotion? There is a choice between Greek and Latin equivalents. Examples are the Greek 'tetrapod' and the Latin 'quadruped'. For one-leggers, the words could be 'uniped' (Latin) or 'monopod' (Greek). I prefer the rhythm of the Greek one, so let's stick to that one.
Monopods have biomechanical problems. The first can be demonstrated easily by hopping on one leg. You will it fatiguing. One reason, but not a major one, is that one set of muscles does the work normally done by two. Fair enough, but the bigger problem has gravity as its cause. Any walk cycle has a stance phase in which the leg pushes against the ground and a swing phase in which thee leg swings forwards, free from the ground. During that swing phase the body will of course fall down, unless another leg supports it. Monopod animals, not having another leg, must deal with the tendency of the body to fall. Do not underestimate this: a normal human biped walk cycle lasts about 1 second, and each leg is off the ground for about 40% of the cycle, meaning about 0.4 seconds. In that time the other leg s supports the body, but what if there wasn't one? Under Earth gravity a time of 0.4 seconds is long enough time to fall 78 cm, much too far to catch up easily with the next step. That unsupported phase should therefore be as short as possible: for 03 second the fall will be 44 cm, for 0.2 seconds it will be 20 cm, and for 0.1 second it will be a mere 5 cm.
During running there are periods in which no leg touches the ground, resembling the monopod problem. Still, our bodies do not move down a long way during the unsupported phase: the unsupported phase does not last long because we do have two legs and because the rate of cycling is much higher than during walking; also we actually jump up enough to combat the falling tendency.
Let's turn the biped human into a monopod human. If you keep the leg moving at the same rate as if you were walking with two legs, the unsupported phase will be about 0.4 seconds as shown above. The only way not to fall 80 cm during that time would be to jump up in each step. This is a sizable jump, costing lots of energy. Of course, speeding up the rate of movement helps, but that calls for high acceleration and deceleration, also costing lots of energy. There is probably an optimal balance in there, minimizing the energy for forward movement. The balance would, as holds for any gait with any number of legs, depend on speed. Monopod animals might not be good at low speeds, because gravity does not allow for a slow jump.
A monopod animal is like a human on a pogo stick. 'Pogoing' (we need a verb) would cost less on a low-gravity world, so perhaps they should be sought there. There is probably an optimal mass for pogoing animals. Jumping is not a good idea for animals with a large mass, because they then need disproportionately heavy skeletons. There would be lower limits too: you might think that falling is irrelevant for animals as small as insects, as they would not hurt themselves much by doing so. Then again, the short distance means that there is no time to break the fall, and whatever your size, during a fall control of the body is lost, never a good idea.
|Click to enlarge; copyright Gert van Dijk|
Finally, having one leg results in no redundancy whatsoever: a monopod with a leg injury is probably doomed, whereas a biped might limp away, and a millipede would simply continue on its way.
|Click to enlarge; copyright Gert van Dijk|