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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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    1. letting massive data tell their story… Albert-LászlóBarabási Center for Complex Networks Research, Northeastern U. Department of Medicine, Harvard Medical School BarabasiLab.com

    2. Tropical forest in Yucatan, Mexico “Lévy flight” by a spider monkey

    3. Tropical forest in Yucatan, Mexico

    4. Http://www.nd.edu/~networks Random walk theory AlbertEinstein,The theory of the Brownian Motion ANNALEN DER PHYSIK (1906)

    5. Random Walks Lévy flights

    6. Animal Motion Pókmajom Wandering Albatross Wandering Albatross Vishwanatan et. al. Nature(1996); Nature (1999). Sirályok repülése

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

    8. WhereIsGeorge.com Human Motion Brockmann, Hufnagel, Geisel Nature (2006)

    9. Human Motion

    10. Human Motion Brockmann, Hufnagel, Geisel Nature (2006)

    11. A human’s real trajectory

    12. Mobile Phone Users

    13. Mobile Phone Users 200 km 100 km 0 km 0 km 100 km 200 km 300 km

    14. β=1.75±0.15 • Two possible explanations • Each users follows a Lévy flight • The difference between individuals follows a power law

    15. Understanding human trajectories Center of Mass: Radius of Gyration:

    16. Scaling in human trajectories βr=1.65±0.15

    17. Mobile Phone Users 200 km 100 km 0 km 0 km 100 km 200 km 300 km

    18. The shape of human trajectories

    19. Mobile Phone Viruses Hypponen M. Scientific American Nov. 70-77 (2006).

    20. Why did we not have a significant mobile virus breakout so far?

    21. 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)

    22. Spatial Spreading Patterns of Bluetooth and MMS virus

    23. Spreading mechanism for cell phone viruses If the market share of an Operating System is under mc~10%, MMS viruses cannot spread.

    24. You are what the data tells about you… BarabasiLab.com

    25. Collaborators Pu Wang Marta Gonzalez Cesar Hidalgo www.BarabasiLab.com