Explorers and Returners - Luca Pappalardo
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Transcript of Explorers and Returners - Luca Pappalardo
Returners and Explorers dichotomy in Human Mobility
L. Pappalardo, F. Simini, S. Rinzivillo
D. Pedreschi, F. Giannotti, A.-L. Barabasi
Luca Pappalardo, PhD
postDoc at Unipi @siffolonelucapappalardo.com
Big Data Tales @bigdatatales
bigdatatales.com
Epidemics
“Europeans spreaded at the expense of other peoples was by infecting them with infectious diseases […], to which non-European peoples had no resistance”.
Jared Diamond
Who are today’s explorers?
Human Mobility and Big Data
Two Big Data sources
• GSM data60,000 individuals in Spain
• GPS data40,000 vehicles in Tuscany
GSM vs GPS: different resolutionsGPS GSM
recurrent vs total mobility
total radius
all the locations of an individual
recurrent vs total mobility
total radius recurrent radius
all the locations of an individual
k frequent locations of an individual
recurrent vs total mobility
total radius recurrent radius
The characteristic distance traveled by an individual
What’s the shape of returners and
explorers?
2-returners
2-explorers
rg ≈ 10 km rg ≈ 50 km rg ≈ 250 km
Like Columbus…
Different roles in the spreading of epidemics
Marriages are made in heavenre
turn
er
retu
rner
expl
orer
expl
orer
Marriages are made in heaven
• We are returners or
explorers…no middle ground!
• Explorers have a star-like
pattern• d-EPR model captures the
dichotomy
• Explorers are spreaders
• Dichotomic Social Homophily
@siffolone @bigdatatales
L. Pappalardo et al.Returners and Explorers dichotomy in Human MobilityNature Communications 6:8166, 2015
Thank you!