big data in a small world
DESCRIPTION
BIG DATA in a small world. Alessandro Panconesi Informatica. THE STARS. PEOPLE. The INTERNET is an observatory on Crowds. A Paradigm Shift. A Paradigm Shift. COMPUTATIONAL SOCIAL SCIENCE?. A CLASSIC REVISITED. Outcome. 30% of the letters reached the target - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/1.jpg)
BIG DATA in a small world
Alessandro PanconesiInformatica
![Page 2: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/2.jpg)
THE STARS
![Page 3: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/3.jpg)
PEOPLE
![Page 4: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/4.jpg)
The INTERNET is an observatory on Crowds
![Page 5: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/5.jpg)
A Paradigm Shift
![Page 6: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/6.jpg)
A Paradigm Shift
![Page 7: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/7.jpg)
COMPUTATIONAL SOCIAL SCIENCE?
![Page 8: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/8.jpg)
A CLASSIC REVISITED
![Page 9: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/9.jpg)
![Page 10: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/10.jpg)
![Page 11: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/11.jpg)
![Page 12: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/12.jpg)
![Page 13: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/13.jpg)
![Page 14: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/14.jpg)
![Page 15: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/15.jpg)
![Page 16: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/16.jpg)
Outcome
30% of the letters reached the target
Average (median) chain length was roughly six
![Page 17: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/17.jpg)
Conjectures
Take any two people in the world, and they will be connected by a very short chain of acquaintances
![Page 18: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/18.jpg)
A matter of scale
300
![Page 19: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/19.jpg)
A matter of scale
300 60,000
![Page 20: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/20.jpg)
A matter of scale
300 60,000 230,000,000
![Page 21: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/21.jpg)
A matter of scale
300 60,000 750,000,000230,000,000
![Page 22: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/22.jpg)
A matter of scale
300 60,000 750,000,000230,000,000
Non trivial computational issues
![Page 23: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/23.jpg)
MORE PREDICTIVE POWER?
![Page 24: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/24.jpg)
![Page 25: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/25.jpg)
![Page 26: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/26.jpg)
Google Flu Trends
Nature 457, 1012-1014 (2009)
![Page 27: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/27.jpg)
DENGUE FEVER
![Page 28: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/28.jpg)
Quack Oil?
![Page 29: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/29.jpg)
More Evidence
MoviesHitsStocks?…
![Page 30: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/30.jpg)
ETHICAL ISSUES
![Page 31: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/31.jpg)
No one would have believed in the first years of the XXI century that this world was being watched keenly and closely by
awesome computing and financial powers; that as people busied themselves about their various concerns they were
scrutinised and studied, perhaps almost as narrowly as a person with a microscope might scrutinise the transient creatures that
swarm and multiply in a drop of water. …
Adapted from “The War of the Worlds” by H.G.Wells
![Page 32: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/32.jpg)
All'inizio del XXI secolo nessuno avrebbe mai creduto che il nostro pianeta fosse sotto osservazione da parte di entità
cibernetico-finanziarie di inimmaginabile potenza e che mentre l'umanità si affaccendava nella sua quotidianità i suoi movimenti venivano osservati da vicino da occhi cupidi, allo steso modo in
cui i batteri che pullulano e si moltiplicano sono studiati attentamente al microscopio…
Adapted from “The War of the Worlds” by H.G.Wells
![Page 33: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/33.jpg)
FINAL REMARKS
• Paradigm shift in the social sciences?• Computational Statistics (more predictive
power)• Hybrid science: data processing CANNOT be
naïve• New algorithms are the key• Ethical caveats apply (privacy etc)
![Page 34: BIG DATA in a small world](https://reader035.vdocuments.us/reader035/viewer/2022062814/56816814550346895ddda6c6/html5/thumbnails/34.jpg)
THANKS