18 August 2009

When zombies attack

I did not understand why a philosopher professor would write about zombies. Scientists or mathematicians on the other hand, I can understand. Researchers at the University of Ottawa have published a paper in Infectious Disease Modelling Research Progress modelling a zombie attack called 'When zombies attack! Mathematical modelling of an outbreak of zombie infection'- abstract
Zombies are a popular figure in pop culture/entertainment and they are usually portrayed as being brought about through an outbreak or epidemic. Consequently, we model a zombie attack, using biological assumptions based on popular zombie movies. We introduce a basic model for zombie infection, determine equilibria and their stability, and illustrate the outcome with numerical solutions. We then refine the model to introduce a latent period of zombification, whereby humans are infected, but not infectious, before becoming undead. We then modify the model to include the effects of possible quarantine or a cure. Finally, we examine the impact of regular, impulsive reductions in the number of zombies and derive conditions under which eradication can occur. We show that only quick, aggressive attacks can stave off the doomsday scenario: the collapse of society as zombies overtake us all.
Finally, some valuable research on the zombie phenomena. See also BBC News. I liked this bit

The study has been welcomed by one of the world's leading disease specialists, Professor Neil Ferguson, who is one of the UK government's chief advisors on controlling the spread of swine flu.

"The paper considers something that many of us have worried about - particularly in our younger days - of what would be a feasible way of tackling an outbreak of a rapidly spreading zombie infection," said Professor Ferguson, from Imperial College London.

However he thinks that some of the assumptions made in the paper might be unduly alarmist.

"My understanding of zombie biology is that if you manage to decapitate a zombie then it's dead forever. So perhaps they are being a little over-pessimistic when they conclude that zombies might take over a city in three or four days," he said.

Yo.

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