digital city and virtual worlds


Gehan Kamachi "Gehan est un crapaud fou, qui a la couleur d'un amphibien anoure irradié !"

Gehan Kamachi is the digital identity of Jean-Francois LUCAS. The virtual, the real, the physical, the biological and the digital territories are intertwining as much as Gehan is a complement to Jean-François to explore the digital city and virtual worlds.

Research Topics

- Urban traces & Smart cities: Big Data, social media analytics, sensors, crowdsourcing...
- 3D Cities: 2D/3D maps, virtual worlds & mirror worlds, virtual reality, augmented reality, hybrid world...
- From immersion to habit in virtual worlds.


Dec. 2015 - now:  Scientific advisor and researcher Federal Polytechnic School of Lausanne, EPFL, Switzerland.
In charge of academic affairs and projects related to the "Digital City" at the Social Media Lab, a center attached to the Vice-Presidency for Innovation and Technology Transfer (VPIV) of the EPFL.
Also researcher at the Digital Humanities Institute (DHI) of the College of Humanities (CDH), EPFL.

Nov. 2012 - Oct. 2015: Innovation and creativity manager at the Chair of Research and Training "Modelling of imagination, innovation and creation", Télécom ParisTech, Paris, France. 
Also researcher at the Interdisciplinary Institute on Innovation (I3, UMR 9217).

Dec. 2010 - Jun. 2011: Visiting fellows - Center for Research in Computing and the Arts (CRCA) at the University of California, San Diego (UCSD), USA - with Pr. Lev Manovich.
International Study Grant.

Nov. 2008 - Nov. 2012: PhD in Sociology - (first class honours - highest distinction given by the University of Rennes 2).
Under the direction of Pr. Dominique Boullier, Professor in Sociology at Science Po Paris.
Funded by the Regional Council of Brittany.
Title : "From immersion to habit in virtual worlds. The case of cities in Second Life".

Some projects

  • The project "Magic Ring" (avatar's tracking in virtual worlds)
En 2011, I I carried out a wide 3 steps study about avatar's "spatialities" in Second Life and OpenSim (Francogrid):
 1. Online questionnaires
 2. The project "Magic Ring"
 3. Interviews

Almost 200 people participated to the projet "Magic Ring", which is a tracker that collect, each 5 seconds, many data about avatar's actions in a virtual world (position in the world, number of people around, travel mode...). During six months, we collected nearly 90 million data.
This project was develop during my fellowship at the UCSD with the support of the Software Studies Initiative Lab directed by Lev Manovich.
More about this project:

  • Concerts in mix-reality
In a "commando team", I was a part of a team who carried out two concerts in "mixed reality" (2007 & 2008 - click on the images below) to share a live concert experience between physical space and cyberspace. These projects were developed in partnership with The City of Rennes and the festival “Les Trans” (the festival full name is Rencontres Trans Musicales de Rennes).

trans musicales rennes in Second Life

trans musicales rennes in Second Life

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