Sepandar David Kamvar (born 1977), also known as Sep Kamvar, is a computer scientist, artist, author and entrepreneur. He is currently the founder of Celo, a cryptocurrency startup. He was previously the LG Career Development Professor of Media Arts and Sciences at MIT, and director of the Social Computing group at the MIT Media Lab. He left MIT in 2016. Computer science Kamvar's main contributions to computer science have been at the intersection of computer science and mathematics, particularly in the fields of personalized search, peer-to-peer networks, social search and data mining. Personalized search As a graduate student at Stanford University, Kamvar developed tools that made it possible to compute personalized PageRank. He also developed the first efficient algorithm for adding personal context to the internet search process. In 2003, Kamvar co-founded Kaltix, a personalized search engine company. He was the CEO of Kaltix until Google acquired the company in September 2003. After the acquisition of Kaltix, Kamvar joined Google, where he led the personalization efforts between 2003 and 2007. Peer-to-peer networks Kamvar's research and work in peer-to-peer networks focused on the social mechanisms that reward cooperation and punish adversarial behavior. His 2003 paper, EigenTrust, is one of the most highly cited papers in the field. "Dog" programming language Dog is a high-level programming language created by Kamvar at MIT Media Lab. It was announced in spring 2012, and stems from the frustration faced by Kamvar with other existing languages, such as Java, and felt they made it needlessly difficult to write code that handled social interactions. It is designed to facilitate easier creation of social computing applications, and is designed to facilitate programming in a natural language and allow newcomers the chance to learn programming more easily. About Dog, Kamvar said "I had to write code at a lower level of abstraction than I had to think about the interactions. And so I thought it would be interesting to start writing a programming language that allowed me to write at the same level of abstraction that I think." Art Kamvar is an advocate for using the web as a medium for artistic expression. He believes the ability to constantly change and be viewed by millions of people simultaneously makes the web an opportune medium for art. We Feel Fine Kamvar created We Feel Fine with Jonathan Harris in 2005. Debuting in 2006, it is an interactive experience using more