Recent Interesting Science Articles (Feb’08)

Four articles this month, one on how behavior in robots can “evolve”, one on a new way of using stem cells, one on a controversial device to disperse teenaged loiterers in the U.K. and a last one on the creation of a material blacker than any previously known.

In the first article, researchers at the Swiss Federal Institute of Technology have created learning robots outfitted with light sensors, light rings and a neural circuitry of 30 “genes” that together determine their behavior. These robots were then placed in a specially designed habitat with designated areas containing either “food” or “poison” that charged or drained their batteries respectively. The “genes” from the survivors of each round, together with some randomness to simulate mutation, were recombined to form a new generation of robots that were again set loose in the habitat. By the 50th generation, some of the robots had evolved the ability to communicate with each other, lighting up to alert other robots to the presence of food or poison and even learned to cheat by signaling food where there is really poison and quietly “eating” the food by itself.

Continue reading Recent Interesting Science Articles (Feb’08)

$10 million note for Zimbabwe

Continuing its slide into barbarism, the government of Zimbabwe has just released a $10 million Zimbabwe dollar note, which as this article writes, is still not enough to buy a single hamburger. An inflation rate of 150,000% is almost impossible to comprehend, so to break it down a bit:

150,000% inflation per year / 365 days = 410.96% inflation per day

To put this into perspective, at a daily inflation rate of 410.96%, something that costs, say, $10 today would end up costing $51.10 at the same time tomorrow. Needless to say, this makes life in Zimbabwe pretty tough. The really sad thing is that Zimbabwe was once one of the most developed countries in Africa with decent transport and power infrastructure and a thriving economy based on agriculture, mining and tourism. This of course is due to President Mugabe’s harebrained land redistribution policy in the late 1990s which resulted in the eviction of 4,000 white farmers and a stubborn refusal to face basic facts.

Between 2000 and 2007, Zimbabwe’s economy contracted by 40%, tourist visits fell by 75% in 2000 and the government has given up publishing official inflation figures. Within a period of less than 10 years, Zimbabwe has gone from a big exporter of wheat to having its citizens hunt for rats in fields to eat. President Mugabe continues to insist that the economy’s problems are due to sanctions imposed by Western countries despite the fact that the only sanctions that have been imposed are travel bans against the members of his government. His government insists that the inflation is caused by shopkeepers who keep raising their prices and has introduced price controls, though these are impossible to properly enforce, that effectively obliges shops to sell goods at a loss.

Zimbabwe will make a fantastic case study of how not to run an economy for many decades to come. It’s an incredibly potent reminder of how quickly and how completely a country can be ruined by gross mismanagement.

Addendum (1st March):

Someone has since commented on StumbleUpon that my daily inflation calculation above is incorrect. He is in fact right and that my calculations suck because they do not take into account the compounded effects of daily inflation. In fact, with an annual inflation rate of 150,000%, the daily inflation rate for Zimbabwe should only be around 2.0240155%. I’ve left the original text unchanged as a record of my stupid mistake.

A Book: Rainbows End

Tommie laughed. “You should do some ego surfing. Your hack was noticed. Back when I was young, you could have got a patent off it. Nowadays –”

Xiu patted Tommie’s shoulder. “Nowadays, it should be worth a decent grade in a high school class. You and I — we have things to learn, Thomas.”

– Vernor Vinge in Rainbows End

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As the person who came up with the term “Technological Singularity”, any new science-fiction book by Vernor Vinge is always highly anticipated. Unlike his previous two bestsellers, A Deepness in the Sky and A Fire Upon the Deep, both of which were space opera novels set in a universe of his own creation with specific rules to allow a high level of technological development without invoking a singularity, Rainbows End is a solid science-fiction story set in a near-future Earth. There are tech toys aplenty and cyberspace permeates and interconnects with the real world, but it’s still more or less our same old planet with recognizable lifestyles and people. Unnoticed by the most of the world’s population however, who live mostly pleasant and peaceful lives, are events that suggest that the state of the world is not as stable as it seems, and there are hints of upheavals yet to come.

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Gong Tau

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Apologies for the poor quality of the screenshot. I had to disable hardware video acceleration to take it. It’s from a recent Hong Kong movie that my wife and I just watched, called Gong Tau in Cantonese, and badly translated as Oriental Black Magic in English. Check out LoveHKFilm.com (which happens to be my favourite site for reviews of Asian cinema) for a full review.

By any reasonable standard, this is one terrible film. It has bad acting (Mark Cheng is impossibly stone-faced no matter what kind of crazy shit is happening while Maggie Siu is a hopeless mess of hysterics in just about every scene), a perfectly predictable by-the-numbers plot hurried along by wildly implausible yet convenient events, sometimes extremely fake-looking CGI, and absolutely zero sense of actual horror due to the lack of any tension or dread. What is amazing about this film however, is its sheer excess that as LoveHKFilm points out, has not been from Hong Kong in a while.

Full frontal nudity, both male and female? Check. Mutilated baby? Check. Gross autopsies and vivisections? Check. Animals shredded into stringy bits? Check. It’s like the film makers held a round table to brainstorm ideas for the most shocking and disgusting scenes possible and high-fived each other over every sick suggestion. You know how in some games when characters get blown up and you end up with gory bits of blood-drenched remains scattered all over the place that are now known as gibs? Well, if you ever wanted to see what gibs might look like in a movie, Gong Tau is the film to watch.

Even the ridiculousness of the Asian curses aspect of the movie pales before the excessive gore, but they still deserve some mocking. I mean, flying heads? Mind control? Black market magicians selling each other corpse oil? I don’t really need to reiterate my longstanding disdain of superstitious nonsense here, but I have to say that sometimes the best way to show how stupid something is, is to take it to its extremes. If stuff like this really works in real life, why are we still using bullets and bombs?

Anyway, check out this movie if you have a fetish for disgusting gore, or I suppose if you want to see pretty new actress Teng Tzu-Hsuan fully nude, but there’s really no other reason to put up with this pile of crap.

Half-Life 2: Episode 1

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Since even Half-life 2: Episode 1 is two years old now, it’s probably not fair to write a proper review of it so I’ll just jot down some of my thoughts on it. Its graphics are noticeably better than that of the original Half-Life 2, but still some way short of current standards. The most confusing thing about these episodic sequels is that they’re named Half-Life 2: Episode 1 and so forth, when as even Gabe Newell has said, it would make more sense to name them Half-Life 3: Episode 1 etc. Still, wholly brand new sequels are usually a lot more ambitious than Episode 1. The improvements, while noticeable, aren’t spectacular, and the way the story continues immediately after Half-Life 2 makes it feel like you’re playing new chapters of the original game rather than something completely new.

Episode 1 continues with Valve’s tradition of telling stories without cutscenes, choosing instead to keep the player in control in a tightly restricted environment to give for the NPCs to finish their canned speeches. It does work well, thanks to decent writing, good voice acting and, as before, Valve’s impressive technology of enabling the NPCs to have realistic facial expressions. But the way the game keeps locking you in rooms that can only be unlocked by an NPC after finishing a speech does get a bit too transparent.

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Free Will and Morality

A while back, I blogged about how philosophy is embracing empirical experiments. A couple of experiments, one by the University of Minnesota and the other by the University of British Columbia, make for a great example of this. Both experiments had similar aims: to examine what effects belief in free will has on human morality and were structured similarly. The experimental subjects, mostly college students, were separated in two groups. One group was given text to read that expressed skepticism on the subject of free will, arguing that human actions and decisions were mechanistically determined by a variety of genetic and environmental factors. The other group was given either a neutral text in the case of the first experiment or a text that explicitly endorsed and defended free will in the second experiment.

After reading the texts, the students were given the task of completing a test. In both experiments, the students were given the opportunity to cheat on the tests, while being erroneously led to believe that their cheating would not be detectable. The results were that students who were given texts that were skeptical on the subject of free will were more likely than the others to cheat on their given tests. The researchers wisely caution against reading too much from these results, but at first glance, they appear to confirm concerns that advances in our understanding of how our minds work have far greater long-term ethical implications that the more publicly known worries over genetic engineering and nanotechnology.

A Book: World War Z

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Max Brooks’ World War Z is a follow-up to The Zombie Survival Guide which became a commercial success largely through word of mouth on the Internet. While The Zombie Survival Guide was a fictional manual covering the biology of zombies and suggested methods of killing them and surviving a zombie outbreak, World War Z tells the story of a worldwide zombie apocalypse scenario through the oral testimonies of over 40 survivors. It has since become popular enough that there are plans to make a film version of the book with a screenplay by J. Michael Straczynski.

World War Z places the initial zombie outbreak in Sichuan Province, China, where a boy diving for treasure amongst the submerged villages of the Three Gorges Reservoir comes to the surface with a mysterious bite mark on his foot and is kept locked in an abandoned house by frightened villages after attacking and biting a number of them. They notify the local hospital and the doctor who is sent is shocked to discover that the boy is as savage as an animal, biting and clawing at anyone who comes near him. His skin has become cold and gray, and though numerous wounds are found all over his body from his struggles to free himself, no blood comes out of them. A hypodermic needle inserted into where his veins should be comes up filled with a strange, viscous matter. He is even able to snap his own arm in an effort to free himself and seems affected by neither pain nor exhaustion. Not unexpectedly, all of the villagers bitten by the boy have become comatose with cold and gray skin as well.

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The unexamined life is a life not worth living