Transcript

Kaj Kolja KLEINEBERG

Marián BOGUÑÁ

@KoljaKleineberg

Universitat de Barcelona

[email protected]

Digital Ecologyin a nutshell

Motivation Evolution and ecology of OSNs World model Summary & outlook

Multiscale theory of the digital world: From individual tiesto globally interacting networks

Individuals Interacting Worldwide

Mod

el Strength ofsocial ties

Res

ult Weak ties

have highertransmissibility

Viral + mediaeffect & under-lying structure

Viral effect is about fourtimes stronger

Rich-get-richer& diminishingreturns

Coexistance of amoderate numberof services

Network of net-works & effectiveactivity

Local networks canprevail under certainconditions

Focu

s

12

3

101 - 102 105 - 106 106 - 109 >109

Ord

er

Isolatednetwork networks

PRX 4, 031046 Sci. Rep. 5, 10268 arxiv:1504.01368 2

Motivation Evolution and ecology of OSNs World model Summary & outlook

Multiscale theory of the digital world: From individual tiesto globally interacting networks

Individuals Interacting Worldwide

Mod

el Strength ofsocial ties

Res

ult Weak ties

have highertransmissibility

Viral + mediaeffect & under-lying structure

Viral effect is about fourtimes stronger

Rich-get-richer& diminishingreturns

Coexistance of amoderate numberof services

Network of net-works & effectiveactivity

Local networks canprevail under certainconditions

Focu

s

12

3

101 - 102 105 - 106 106 - 109 >109

Ord

er

Isolatednetwork networks

PRX 4, 031046 Sci. Rep. 5, 10268 arxiv:1504.01368 3

Motivation Evolution and ecology of OSNs World model Summary & outlook

Multiscale theory of the digital world: From individual tiesto globally interacting networks

Individuals Interacting Worldwide

Mod

el Strength ofsocial ties

Res

ult Weak ties

have highertransmissibility

Viral + mediaeffect & under-lying structure

Viral effect is about fourtimes stronger

Rich-get-richer& diminishingreturns

Coexistance of amoderate numberof services

Network of net-works & effectiveactivity

Local networks canprevail under certainconditions

Focu

s

12

3

101 - 102 105 - 106 106 - 109 >109

Ord

er

Isolatednetwork networks

PRX 4, 031046 Sci. Rep. 5, 10268 arxiv:1504.01368 4

Motivation Evolution and ecology of OSNs World model Summary & outlook

Evolution of isolated online social networks is governedby underlying social structure and two dynamical processes

Online social network layer

Traditional contactnetwork layer

ActiveOnline & offline

PassiveOnline & offlineSusceptibleOnly offline

Mass media activation Viral activation

Deactivation Viral reactivation

5

Motivation Evolution and ecology of OSNs World model Summary & outlook

Multiscale theory of the digital world: From individual tiesto globally interacting networks

Individuals Interacting Worldwide

Mod

el Strength ofsocial ties

Res

ult Weak ties

have highertransmissibility

Viral + mediaeffect & under-lying structure

Viral effect is about fourtimes stronger

Rich-get-richer& diminishingreturns

Coexistance of amoderate numberof services

Network of net-works & effectiveactivity

Local networks canprevail under certainconditions

Focu

s

12

3

101 - 102 105 - 106 106 - 109 >109

Ord

er

Isolatednetwork networks

PRX 4, 031046 Sci. Rep. 5, 10268 arxiv:1504.01368 6

Motivation Evolution and ecology of OSNs World model Summary & outlook

Multiscale theory of the digital world: From individual tiesto globally interacting networks

Individuals Interacting Worldwide

Mod

el Strength ofsocial ties

Res

ult Weak ties

have highertransmissibility

Viral + mediaeffect & under-lying structure

Viral effect is about fourtimes stronger

Rich-get-richer& diminishingreturns

Coexistance of amoderate numberof services

Network of net-works & effectiveactivity

Local networks canprevail under certainconditions

Focu

s

12

3

101 - 102 105 - 106 106 - 109 >109

Ord

er

Isolatednetwork networks

PRX 4, 031046 Sci. Rep. 5, 10268 arxiv:1504.01368 7

Motivation Evolution and ecology of OSNs World model Summary & outlook

Digital ecosystem is formed by multiple networkscompeting for the attention of individuals

OSN 2

OSN 1

Underl.network

ActivePassiveSusceptible

Partial states}

Virality shareDistributionbetween OSNsλi = ωi(ρ

a)λ

Rich-get-richermore activenetworks obtainhigher share

8

Motivation Evolution and ecology of OSNs World model Summary & outlook

Ecological theory of the digital world explains whywe observe a moderate number of coexisting networks

Unstable FPStable FP

0.0 0.2 0.4 0.6 0.8 1.00.0

0.2

0.4

0.6

0.8

1.0Coexistence σ=0.8

ρ1a

ρ2a

Unstable FPStable FP

0.0 0.2 0.4 0.6 0.8 1.00.0

0.2

0.4

0.6

0.8

1.0Domination σ=1.2

ρ1a

ρ2a

StableUnstable

0.50 0.75 1.00 1.25 1.500.00

0.25

0.50

0.75

Bifurcation diagram

ρ1a

0.0 0.5 1.0 1.5

0.50

0.75

σ

σ

ρ1,2

a

Coexistencedespite rich-get-richer

Moderatedigital diversity

Sci. Rep. 5, 10268

9

Motivation Evolution and ecology of OSNs World model Summary & outlook

Multiscale theory of the digital world: From individual tiesto globally interacting networks

Individuals Interacting Worldwide

Mod

el Strength ofsocial ties

Res

ult Weak ties

have highertransmissibility

Viral + mediaeffect & under-lying structure

Viral effect is about fourtimes stronger

Rich-get-richer& diminishingreturns

Coexistance of amoderate numberof services

Network of net-works & effectiveactivity

Local networks canprevail under certainconditions

Focu

s

12

3

101 - 102 105 - 106 106 - 109 >109

Ord

er

Isolatednetwork networks

PRX 4, 031046 Sci. Rep. 5, 10268 arxiv:1504.01368 10

Motivation Evolution and ecology of OSNs World model Summary & outlook

Multiscale theory of the digital world: From individual tiesto globally interacting networks

Individuals Interacting Worldwide

Mod

el Strength ofsocial ties

Res

ult Weak ties

have highertransmissibility

Viral + mediaeffect & under-lying structure

Viral effect is about fourtimes stronger

Rich-get-richer& diminishingreturns

Coexistance of amoderate numberof services

Network of net-works & effectiveactivity

Local networks canprevail under certainconditions

Focu

s

12

3

101 - 102 105 - 106 106 - 109 >109

Ord

er

Isolatednetwork networks

PRX 4, 031046 Sci. Rep. 5, 10268 arxiv:1504.01368 11

Motivation Evolution and ecology of OSNs World model Summary & outlook

Network of multi-layer networks describes the worldwidedigital ecology for the 80 largest countries

ActivePassiveSusceptible

Partial states}

Localnetwork

Globalnetwork

Effective activity

12

Motivation Evolution and ecology of OSNs World model Summary & outlook

Local networks always become extinct for intermediateactivity affinity but can survive otherwise

13

Motivation Evolution and ecology of OSNs World model Summary & outlook

Multiscale theory of the digital world: From individual tiesto globally interacting networks

Individuals Interacting Worldwide

Mod

el Strength ofsocial ties

Res

ult Weak ties

have highertransmissibility

Viral + mediaeffect & under-lying structure

Viral effect is about fourtimes stronger

Rich-get-richer& diminishingreturns

Coexistance of amoderate numberof services

Network of net-works & effectiveactivity

Local networks canprevail under certainconditions

Focu

s

12

3

101 - 102 105 - 106 106 - 109 >109

Ord

er

Isolatednetwork networks

PRX 4, 031046 Sci. Rep. 5, 10268 arxiv:1504.01368 14

Motivation Evolution and ecology of OSNs World model Summary & outlook

Multiscale theory of the digital world: From individual tiesto globally interacting networks

Individuals Interacting Worldwide

Mod

el Strength ofsocial ties

Res

ult Weak ties

have highertransmissibility

Viral + mediaeffect & under-lying structure

Viral effect is about fourtimes stronger

Rich-get-richer& diminishingreturns

Coexistance of amoderate numberof services

Network of net-works & effectiveactivity

Local networks canprevail under certainconditions

Focu

s

12

3

101 - 102 105 - 106 106 - 109 >109

Ord

er

Isolatednetwork networks

PRX 4, 031046 Sci. Rep. 5, 10268 arxiv:1504.01368

NetSci Tuesday

2.6. 10:00@ LC2S2

NetSci Wednesday3.6. 17:20in A5+A6

15

Just as a monopoly in economy is a threat to free markets, the lack of

poses a threat to the  digital diversity

freedom of information.

Motivation Evolution and ecology of OSNs World model Summary & outlook

Digital diversity is important. So write downthe references and contact information now!

References:

K.-K. Kleineberg, M. Boguña.PRX 4, 031046, 2014

K.-K. Kleineberg, M. Boguña.Sci. Rep. 5, 10268, 2015

K.-K. Kleineberg, M. Boguña.arxiv:1504.01368, 2015

Kaj Kolja Kleineberg:

[email protected]

• @KoljaKleineberg

in • Kaj Kolja Kleineberg17

Motivation Evolution and ecology of OSNs World model Summary & outlook

Digital diversity is important. So write downthe references and contact information now!

References:

K.-K. Kleineberg, M. Boguña.PRX 4, 031046, 2014

K.-K. Kleineberg, M. Boguña.Sci. Rep. 5, 10268, 2015

K.-K. Kleineberg, M. Boguña.arxiv:1504.01368, 2015

Kaj Kolja Kleineberg:

[email protected]

• @KoljaKleineberg← Slides!

in • Kaj Kolja Kleineberg17

Motivation Evolution and ecology of OSNs World model Summary & outlook

CREATIVE COMMONS CREDITS

Social media chalk: mkhmarketing.wordpress.comNetwork "ring": Adam BeasleyBoxing gloves: Gabriele FumeroWorld: Lorenzo BaldiniMegaphone: Alex Auda SamoraBiohazard: Shailendra ChouhanLayer icon: MentaltoyBalance (scale) icon: Roman KovbasyukBroken tie: ��������Death symbol: Mila RedkoPie Chart: P.J. OnoriMoney sack: Lemon Liu

Team icon: Joshua JonesHand icon: irene hoffmanarm with muscle: Sergey KrivoyNo: P.J. Onoridinosaure: John CasertaLocal: Phil GoodwinSummary (article) icon: Stefan Parnarovflower: Nishanth JoisRead magazine: Evan Travelsteadtwitter: OliMGlobe: Ealancheliyan sLocal: Phil Goodwin

Icons: thenounproject.com

Kaj Kolja Kleineberg:

[email protected]

• @KoljaKleineberg

in • Kaj Kolja Kleineberg18