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letting massive data tell their story…. Albert- László Barabási Center for Complex Networks Research, Northeastern U. Department of Medicine, Harvard Medical School. BarabasiLab.com. Tropical forest in Yucatan, Mexico . “Lévy flight” by a spider monkey.

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letting massive data tell their story…

Albert-LászlóBarabási

Center for Complex Networks Research, Northeastern U.

Department of Medicine, Harvard Medical School

BarabasiLab.com


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Tropical forest in Yucatan, Mexico

“Lévy flight”

by a spider monkey



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Http://www.nd.edu/~networks

Random walk theory

AlbertEinstein,The theory of the Brownian Motion ANNALEN DER PHYSIK (1906)


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Random Walks

Lévy flights


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Animal Motion

Pókmajom

Wandering Albatross

Wandering Albatross

Vishwanatan et. al. Nature(1996);

Nature (1999).

Sirályok repülése


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Vishwanatan et. al. Nature(1996); Nature (1999).


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WhereIsGeorge.com

Human Motion

Brockmann, Hufnagel, Geisel Nature (2006)



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Human Motion

Brockmann, Hufnagel, Geisel Nature (2006)




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Mobile Phone Users

200 km

100 km

0 km

0 km

100 km

200 km

300 km


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β=1.75±0.15

  • Two possible explanations

  • Each users follows a Lévy flight

  • The difference between individuals follows a power law


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Understanding human trajectories

Center of Mass:

Radius of Gyration:



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Mobile Phone Users

200 km

100 km

0 km

0 km

100 km

200 km

300 km



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Mobile Phone Viruses

Hypponen M. Scientific American Nov. 70-77 (2006).



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Spreading mechanism for cell phone viruses far?

Long range infection process

(similar to computer viruses)

Short range infection process

(similar to biological viruses,

like influenza or SARS)



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Spreading mechanism for cell phone viruses far?

If the market share of an Operating System

is under mc~10%, MMS viruses cannot spread.



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Collaborators far?

Pu Wang

Marta Gonzalez

Cesar Hidalgo

www.BarabasiLab.com


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