BEGIN:VCALENDAR PRODID:-//Microsoft Corporation//Outlook 16.0 MIMEDIR//EN VERSION:2.0 METHOD:PUBLISH X-MS-OLK-FORCEINSPECTOROPEN:TRUE BEGIN:VTIMEZONE TZID:Central Standard Time BEGIN:STANDARD DTSTART:16011104T020000 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZOFFSETFROM:-0500 TZOFFSETTO:-0600 END:STANDARD BEGIN:DAYLIGHT DTSTART:16010311T020000 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZOFFSETFROM:-0600 TZOFFSETTO:-0500 END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT CLASS:PUBLIC CREATED:20230118T223814Z DESCRIPTION:Speaker:\nYong-Yeol "YY" Ahn\, Associate Professor\, Center for Complex Networks and Systems Research\, Luddy School of Informatics\, Com puting\, and Engineering\, Indiana University Bloomington\n\nTitle:\nScien ce of science\, law of law\, and patterns of patents: universal citation d ynamics in knowledge systems\n\nAbstract:\nCitation is a fundamental way f or humans to acquire and expand on existing knowledge. Although many laws and regularities of citation dynamics have been discovered from scientific citations\, it is unclear whether and to what extent these regularities a re inherent in how humans seek\, use\, and create knowledge. We show that\ , despite many stark differences between these systems\, the citation dyna mics in science\, law\, and patents share universal patterns. Given the di fferences in procedure and incentives that exist between judges\, inventor s\, and scientists\, our findings suggest that universal citation dynamics may be innate to any cumulative human knowledge system. Our model demonst rates that the evolution of collective attention and a handful of fundamen tal mechanisms can produce observed universal patterns of citation dynamic s.\nSpeaker Bio:\n​Yong-Yeol (YY) Ahn is an Ass ociate Professor at Indiana University School of Informatics\, Computing\, and Engineering. He was a Visiting Professor at MIT during 2020-2021. Bef ore joining Indiana University\, he worked as a postdoctoral research asso ciate at the Center for Complex Network Research at Northeastern Universit y and as a visiting researcher at the Center for Cancer Systems Biology at Dana-Farber Cancer Institute after earning his PhD in Statistical Physics from KAIST in 2008. His research focuses on developing network science an d machine learning methods\, and applying them to complex social and biolo gical systems. He is a recipient of several awards including Microsoft Res earch Faculty Fellowship and LinkedIn Economic Graph Challenge.\nLocation: \nIn person: Chambers Hall \, 600 Foster Street\, Lower Level\nRemote option: https://northwestern.z oom.us/j/93818374439 \nPasscode: NICO23\nAbout the Speaker Series: \nWednesdays@NICO is a vibrant weekly seminar series focusing broadly on t he topics of complex systems and data science. It brings together attendee s ranging from graduate students to senior faculty who span all of the sch ools across Northwestern\, from applied math to sociology to biology and e very discipline in-between. Please visit: https://bit.ly/WedatNICO for inf ormation on future speakers.\n \n \n DTEND;TZID="Central Standard Time":20230215T130000 DTSTAMP:20230118T223814Z DTSTART;TZID="Central Standard Time":20230215T120000 LAST-MODIFIED:20230118T223814Z LOCATION:In person at Chambers Hall\, or remote via Zoom PRIORITY:5 SEQUENCE:0 SUMMARY;LANGUAGE=en-us:Wed@NICO\, 2/15\, Yong-Yeol "YY" Ahn TRANSP:OPAQUE UID:040000008200E00074C5B7101A82E00800000000F0BB20AE4C2BD901000000000000000 01000000088172678EC80984A9DE8526864AB2DEE X-ALT-DESC;FMTTYPE=text/html:

Speaker:

Yong-Yeol "\;YY"\; Ahn\, Associate Professor\, Center for Complex Netw orks and Systems Research\, Luddy School of Info rmatics\, Computing\, and Engineering\, Indiana University Bloomington

Title:

Science of scie nce\, law of law\, and patterns of patents: universal citation dynamics in knowledge systems

Abstract:

Citation is a fundamental way for hum ans to acquire and expand on existing knowledge. Although many laws and re gularities of citation dynamics have been discovered from scientific citat ions\, it is unclear whether and to what extent these regularities are inh erent in how humans seek\, use\, and create knowledge. We show that\, desp ite many stark differences between these systems\, the citation dynamics i n science\, law\, and patents share universal patterns. Given the differen ces in procedure and incentives that exist between judges\, inventors\, an d scientists\, our findings suggest that universal citation dynamics may b e innate to any cumulative human knowledge system. Our model demonstrates that the evolution of collective attention and a handful of fundamental me chanisms can produce observed universal patterns of citation dynamics.

Speaker Bio:

Yong-Yeol (YY) Ahn is an Associate Professor at Indiana University School of I nformatics\, Computing\, and Engineering. He was a Visiting Professor at M IT during 2020-2021. Before joining Indiana University\, he worked as a po stdoctoral research associate at the Center for Complex Network Research a t Northeastern University and as a visiting researcher at the Center for C ancer Systems Biology at Dana-Farber Cancer Institute after earning his Ph D in Statistical Physics from KAIST in 2008. His research focuses on devel oping network science and machine learning methods\, and applying them to complex social and biological systems. He is a recipient of several awards including Microsoft Research Faculty Fellowship and LinkedIn Economic Gra ph Challenge.

Location:

In person: Chambe rs Hall\, 600 Foster Street\, Lower Level
Remote option: https://northwestern.zoom.us/j/93818374439
Passcode: N ICO23

About the Speaker Series:

Wednesdays@NICO< /span> is a vibrant weekly seminar series focusing broadly on the topics o f complex systems and data science. It brings together attendees ranging f rom graduate students to senior faculty who span all of the schools across Northwestern\, from applied math to sociology to biology and every discip line in-between. Please visit: https:// bit.ly/WedatNICO for information on future speakers.

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