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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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slide1

letting massive data tell their story…

Albert-LászlóBarabási

Center for Complex Networks Research, Northeastern U.

Department of Medicine, Harvard Medical School

BarabasiLab.com

slide2

Tropical forest in Yucatan, Mexico

“Lévy flight”

by a spider monkey

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

Random walk theory

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

slide6

Random Walks

Lévy flights

slide7

Animal Motion

Pókmajom

Wandering Albatross

Wandering Albatross

Vishwanatan et. al. Nature(1996);

Nature (1999).

Sirályok repülése

slide10

WhereIsGeorge.com

Human Motion

Brockmann, Hufnagel, Geisel Nature (2006)

slide13

Human Motion

Brockmann, Hufnagel, Geisel Nature (2006)

slide16

Mobile Phone Users

200 km

100 km

0 km

0 km

100 km

200 km

300 km

slide17

β=1.75±0.15

  • Two possible explanations
  • Each users follows a Lévy flight
  • The difference between individuals follows a power law
slide18

Understanding human trajectories

Center of Mass:

Radius of Gyration:

slide20

Mobile Phone Users

200 km

100 km

0 km

0 km

100 km

200 km

300 km

mobile phone viruses
Mobile Phone Viruses

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

slide25

Spreading mechanism for cell phone viruses

Long range infection process

(similar to computer viruses)

Short range infection process

(similar to biological viruses,

like influenza or SARS)

slide27

Spreading mechanism for cell phone viruses

If the market share of an Operating System

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

slide30

Collaborators

Pu Wang

Marta Gonzalez

Cesar Hidalgo

www.BarabasiLab.com