Ed H. Chi 紀懷新 Curriculum Vitae

email: chi@acm.org



To lead world-class research on novel problems in machine learning, human-computer interaction, and social computing.

Research Interests

Machine Learning, Recommender Systems, Human-Computer Interaction, Social Media / Social Networking / Social Web / Web2.0 / Social Computing, Intelligent User Interfaces, User Behavior Analytics, Information Visualization.

Professional Experience


2/2011 -- Now, Senior Staff Research Scientist and Tech Lead.

  • Led a team of researchers in conducting research on social search, recommendation, machine learning, crowdsourcing.
  • Launched product features such as G+ on friend suggestions, content recommendation, and personalization.
  • Conducted research on social search and annotations with launched Google Search changes.
  • Curated and Oversaw $2M+ of external Google grants to academic researchers in Social Research.

Xerox Palo Alto Research Center (PARC)

4/2007 -- 2/2011, Area Manager and Principal Scientist, Augmented Social Cognition Area.

  • Defined and led a group of Ph.D. researchers on Social Web and Web2.0 technologies that augmented a group's ability to remember, think, and reason.4/2005 -- 4/200Senior Research Scientist, Xerox' Palo Alto Research Center (PARC)
  • Member of User Interface Research Group
  • Led research in social computing, social and personalized search, electronic reading environments, eyetracking experiments.

3/1999 -- 4/2007, Research Scientist.

  • Member of User Interface Research Group
  • Research in Web Analysis algorithms, Information Visualization
  • Leader of the Information Scent Project that studied the behavior of web surfers and applied the understanding to web analysis and web applications (co-managed 10 people).
  • Mentored and supervised many summer interns

6/1998 -- 9/1998, Summer Intern.

  • Mentor: Stuart K. Card, Peter Pirolli
  • Designed and implemented a Web Analysis Visualization Spreadsheet.

6/1997 -- 12/1997, Summer Intern and Consultant.

  • Mentor: Stuart K. Card, Peter Pirolli
  • Participated and formulated a new design for visualizing evolving Web ecologies.
  • Several inventions filed for patents, and designed 1997 Xerox PARC Intern Program T-Shirt

University of Minnesota

3/1997 -- 6/1997, Instructor. Dept. of Computer Science.

  • Lectured on an advanced 5000-level course in C++ and object-oriented design (70 students).
  • Best Teaching Award

9/1994 -- 3/1997, 1/1998 -- 6/1998, 9/1998 -- 3/1999, Research Assistant. Dept. of Computer Science.

  • Advisor: Dr. John Riedl

6/1994 -- 9/1994, Apprentice. Geometry Center.

  • Supervisors: Dr. Silvio Levy, Dr. Richard McGehee

1/1994 -- 6/1994, Undergrad Research Assistant, Dept. of Computer Science.

  • Advisor: Dr. John Carlis

10/1993 -- 6/1994, Research Programmer. Dept. of Cell Biology and Neuroanatomy.

  • Supervisor: Dr. Ed Egelman

9/1993 -- 6/1994, Computer Lab Consultant. Distributed Computing Services.

6/1993 -- 7/1993, Teaching Assistant. Geometry Center.

  • Supervisors: Dr. Brad Barber, Dr. Pat Hanrahan


Ph.D., Computer and Information Science, Sep. 1996 - Mar. 1999, University of Minnesota.

  • Thesis: "A Framework for Information Visualization Spreadsheets
  • Advisor: Dr. John T. Riedl
  • Area: Visualization, User Interfaces, Graphics
  • Awarded 1998 University of Minnesota Graduate School Doctoral Dissertation Fellowship, Research Contribution Award 1998, Doctoral Dissertation Award 1998, Best Teaching Award 1997, Best Written Qualifying Exam 1996,
  • GPA: 4.0

M.S., Computer Science with Graduate Minor in Scientific Computation, Sep. 1994 - Dec. 1996, University of Minnesota

  • Area: Computation Molecular Biology with emphasis on Information Visualization
  • Advisor: Dr. John T. Riedl
  • GPA: 4.0

Bachelor of Computer Science with Minor in Mathematics, Sep. 1992 - June, 1994, University of Minnesota

  • Summa Cum Laude with Highest Distinction in two year.
  • GPA: 4.0

Minneapolis South High School, Sep. 1988 - June, 1992

  • Valedictorian with Highest Distinction
  • Attended University of Minnesota for College-level Classes from June 1989 to June 1992
  • GPA: 4.08

Selected Publications

(complete list here)

Machine Learning

Zhe Zhao, Zhiyuan Cheng, Lichan Hong, Ed H. Chi. Improving User Topic Interest Profiles by Behavior Factorization. In Proc. of the 24th International Conference on World Wide Web (WWW '15). Geneva, Switzerland, 1406-1416. 2015. ACM WWW

Social Recommender

Jilin Chen, Rowan Nairn, Ed H. Chi. Speak Little and Well: Recommending Conversations in Online Social Streams. In Proc. of CHI2011. Vancouver, Canada. UMN


Aniket Kittur, Ed H. Chi, Bongwon Suh. Crowdsourcing User Studies With Mechanical Turk. In Proc. of the ACM Conference on Human-factors in Computing Systems (CHI2008), pp.453-456. ACM Press, 2008. Florence, Italy. (18% acceptance rate) UMN


Ed H. Chi. Introducing Wearable Force Sensors in Martial Arts. IEEE Pervasive Computing, Vol. 4, No. 3, pp. 47--53. July, 2005. IEEE Press.

Web Analytics

Jeffrey Heer, Ed H. Chi. Separating the Swarm: Categorization Methods for User Access Sessions on the Web. In Proc. of ACM CHI 2002 Conference on Human Factors in Computing Systems, pp. 243--250. ACM Press, April 2002. Minneapolis, MN. (15% acceptance rate) UMN

Behavior Modeling

Christopher Olston, Ed H. Chi. ScentTrails: Integrating Browsing and Searching on the Web. ACM Transactions on Computer-Human Interaction, Vol. 10, Part 3, pp. 177--197. Sept, 2003. ACM Press.


Ed H. Chi, John Riedl, Phillip Barry, Joseph Konstan. Principles for Information Visualization Spreadsheets. IEEE Computer Graphics and Applications (Special Issue on Visualization), pp. 30--38. July/August, 1998. IEEE CS Press.

Awards Received

  1. PARC Outstanding Award (2009)
  2. PARC Outstanding Performance Award (Feb 2008)
  3. PARC Acorn Award for Outstanding Patents (2006)
  4. PARC Outstanding Performance Award, Palo Alto Research Center (Feb 2005)
  5. ISTL Special Recognition Award, Palo Alto Research Center (Feb 2004)
  6. PARC Net New Revenue Award, Palo Alto Research Center (Feb 2004)
  7. PARC Net New Revenue Award, Palo Alto Research Center (Feb 2003)
  8. ISTL Special Recognition Award, Palo Alto Research Center (Jan 2003)
  9. Outstanding Achievement Award, Stanford University TaeKwonDo Program (Spring 2001)
  10. Outstanding Achievement Award, Xerox Palo Alto Research Center (May 2000)
  11. University of Minnesota Doctoral Dissertation Fellowship (1998), and Supplemental Grant (October 1998)
  12. Research Contribution Award, Computer Science Dept., University of Minnesota (1998)
  13. Outstanding Scholarly Contribution Award, Computer Science Dept., University of Minnesota (June 1998)
  14. Doctoral Dissertation Award, Computer Science Dept., University of Minnesota (1998)
  15. ConSern Scholarship (1997)
  16. Best Teaching Award, Computer Science Dept., University of Minnesota (1997)
  17. Highest Distinction in Ph.D. Written Qualifying Exam Award, Computer Science Dept., University of Minnesota (1996)
  18. Institute of Technology Dean's List (All Quarters during Undergraduate Degree)
  19. Undergraduate Research Grant, University of Minnesota. (1994)
  20. Cargill Scholarship, Computer Science Dept., University of Minnesota (1993)
  21. Kiwanis Club College Scholarship. (1992)
  22. Junior Achievement College Scholarship. (1992)

Mentorship of Students/Interns (chronological)

  1. Vikas Kumar, 2016, UMN
  2. Vena Li, 2016, UIC
  3. Alex Beutel, 2015, CMU
  4. Amy X. Zhang, 2015, MIT
  5. Shuo Chang, 2014 and 2015, UMN
  6. Zhe Zhao, 2014 and 2015, UMich
  7. Anant Bhardwaj, 2013-2014, MIT
  8. Lydia Chilton, 2013, UW
  9. Amit Sharma, 2013, Cornell
  10. Karthik Subbian, 2013, UMN
  11. Stephen Guo, 2013, Stanford
  12. Victoria Sosik, 2013, Cornell
  13. Roshanak Zilouchian, 2013, UIUC
  14. Phil Adams, 2013, Cornell
  15. Aaron Halfaker, 2013, UMN
  16. Wesley Willett, 2012, UCBerkeley
  17. Katrina Panovich, 2012, MIT
  18. Scott Golder, 2012, CMU
  19. Saleema Amershi, 2012, UW
  20. Jeff Rzeszotarski, 2012, CMU
  21. Chenhao Tan, 2012, Cornell
  22. Aditi Muralidharan, 2011-2012, UCBerkeley
  23. Chinmay Kulkarni, 2011, Stanford
  24. Ben Lickly, 2011, UCBerkeley
  25. Sanjay Kairam, 2011, Stanford
  26. Jilin Chen, 2009 and 2010, University of Minnesota
  27. Brent Hecht, 2010, Northwestern Univ.
  28. Nicholas Kong, 2010, UCBerkeley
  29. Ben Hanrahan, 2010, Virginia Tech
  30. Michael Bernstein, 2009, MIT
  31. Bryan Chan, 2008, Stanford
  32. Terrell Russell, 2008 RA, UNC
  33. Brynn Evans, 2008 RA, UCSD
  34. Aniket (Niki) Kittur, 2007, UCLA
  35. Todd Mytkowicz, 2006, Univ. of Colorado
  36. Aniket (Niki) Kittur, 2006, UCLA
  37. Peter Lai, 2006 Undergraduate Intern, MIT
  38. Tony Shyong Lam, 2005, Univ. of Minnesota
  39. Eddie Ishak, 2005, Columbia University
  40. Heather Hyunyoung Song, 2005, Univ. of Maryland, College Park
  41. Fabio Gasparetti, 2004, Univ. of Rome Tre
  42. Doantam Phan, 2003, Stanford
  43. Cristian Cadar, 2003 Undergrad Intern, MIT
  44. Ying Feng, 2002, Indiana U.
  45. Jason Bayer, 2002 Undergrad Intern, UC Berkeley
  46. Sean McNee, 2001, U. of Minn.
  47. William Liu, 2001 Undergrad Intern, Cornell U.
  48. Chris Olston, 2000, Stanford
  49. Jeffrey Heer, 2000 Undergrad Intern, UC Berkeley
  50. Kim Chen, 2000 Undergrad Intern, Stanford


  1. UC Berkeley, HCI Class, Visual Cognition, Nov. 26, 2003.
  2. Stanford University, CS 147 HCI Class, Visual Cognition. Hosted by Terry Winograd. Nov. 19, 2003
  3. Stanford University, CS 147 HCI Class, Information Visualization. Hosted by Jan Borchers. November 27, 2002
  4. Stanford University, CS 147 HCI Class, Information Visualization. Hosted by Terry Winograd. October 24, 2001
  5. Stanford University, CS 147 HCI Class, Information Visualization. Hosted by Terry Winograd. October 23, 2000
  6. Stanford University, Human Computer Interaction Seminar. Advantages of Information Visualization. Hosted by Terry Winograd. October 18, 1999
  7. University of Minnesota, Computer Science Department. Lecturer (supervised 3 TAs), Spring, 1997.
    • Lectured on an advanced 5000-level course in C++ and object-oriented design (70 students).
    • Won Best Teaching Award
  8. University of Minnesota, Scientific Computation Graduate Program, Information Visualization of Molecular Biology Data. Spring 1997.
  9. University of Minnesota, Scientific Computation 8001 Parallel Scientific Computing. Computation Molecular Biology. Fall, 1995
  10. University of Minnesota, Geometry Center. Genetic Sequence Information Visualization: Background and Practice. Summer 1993

Major Technical Artifacts and Systems

  1. Spreadsheet for Visualization (1999)
  2. DiscTree and TimeTube for Web visualization and analysis (1999)
  3. LumberJack Web Log Analytics (2002)
  4. Bloodhound Web Usability simulation (2002)
  5. ScentTrails smart trails for web users (2003)
  6. 3Book 3D book viewer with smart highlights and ScentIndex smart index system (2004)
  7. TaeKwonDo wireless wearable force sensing body protector (2004)
  8. Magitti context-aware mobile guide (2007)
  9. WikiDashboard: Social Transparency for Wikis (2008)
  10. SparTag.us: Social Tagging for paragraphs (2008)
  11. MrTaggy: Tag-based Search Browser (2009)
  12. ZeroZero88.com: Twitter News and Conversation Recommender (2009)
  13. G+ Translate (2013)
  14. G+ Friend Recommender using Triadic Clsoure (2013)
  15. G+ Graph Analytics Platform (2014)
  16. G+ What's Hot Content Recommender and G+ Personalization and Topic Modeling Module (2014, 2015)
  17. Google Machine Learning Embedding Toolkit (2015)
  18. Google Play App Store Engagement Recommender (2016)
  19. Google Play App Store Faceted Search (2016)
  20. YouTube Home Page Recommender User Engagement Improvements (2016), Diversification (2016)
  21. YouTube Home Page Recommender with Sequence Model using RNNs (2017)
  22. YouTube WatchNext Recommender with TensorFlow (2017)


  1. Boing Boing. MrTaggy. June 30, 2009.
  2. Wikipedia Weekly Podcast 30min Interview. Spring, 2009.
  3. Slashdot. Tool Shows the Arguments Behind Wikipedia Entries. Feb. 8, 2009.
  4. MIT Technology Review. Who's Messing with Wikipedia? MIT Press, Feb. 6, 2009.
  5. World Journal. Social Websites have no boundries. Jan. 23, 2009
  6. SF Chronicle. Wikimedia pegs future on education, not profit. Chris Cadelago. Aug. 24, 2008.
  7. Slate.com. The Wisdom of the Chaperones: Digg, Wikipedia, and the Myth of Web2.0 Democracy. Chris Wilson. Feb. 22, 2008.
  8. Coverage of WikiDashboard and Social Transparency in Wikipedia around September 2007:
  9. USA Today, Internet suffering from information overload, Andrew Kantor. June 14, 2007.
  10. Chicago Sun Times, Stop Interrupting Yourself, Kate N. Grossman. March 4, 2007.
  11. WirtshaftWoche, Total Vernetzt, Thomas Kuhn, pp. 121-124, 126, 128. Sept, 25, 2006.
  12. LA Times, High-Tech Sign Language Could Replace the Mouse May 31, 2006. (also covered by United Press International)
  13. Christian Science Monitor, How the Web changes your reading habits June 23, 2005.
  14. Technology Research News, Memory-like software aids reading May 4, 2005.
  15. InformationWeek, The Future of Software: AI's Next Brain Wave April 25, 2005.
  16. CNN International TV, and CNN.com, High-tech Blows for Martial Arts August 23, 2004.
  17. CorrierEconomia, Tae kwon do Ci pensa Chi Un sensore per arbitrare July 19, 2004.
  18. UK Register, Wi-Fi is big hit for Tae Kwon Do June 25, 2004.
  19. BBC News, Technology Section, Martial arts lands wireless blow June 25, 2004.
  20. Coverage also by: Investor's Business Daily, and The Feature.
  21. MIT Technology Review, Technology Research News, Sensors Track Martial Arts Blows June 2, 2004.
  22. MIT Technology Review, Technology Research News, Indexes Bolster eBook Search May 21, 2004.
  23. Technology Research News, Search tool aids browsing March 10, 2004.
  24. PC Magazine, PARC Research on Information Scent July 1, 2003.
  25. Webreference.com, Book Review: Human Factors and Web Development, 2nd Ed. December 5, 2002.
  26. Forrester Report, Building A Better Automotive Web Site. November, 2002.
  27. Fall COMDEX 2002 Magazine, Understanding user interaction, key to improving Web info retrieval. Fall (November) 2002.
  28. Computerworld, Conference Report: Usability and Web site success. Nov. 7, 2002
  29. Computerworld, Digital Bloodhounds: Web Users Follow the 'Information Scent'. June 17, 2002
  30. USA Today, High-tech quest for a user-friendly Web. Feb. 6, 2002
  31. LA Times, Net Archive Turns Back 10 Billion Pages of Time. Thursday, October 25, 2001.
  32. Information Week, Web Sites that Work. Aug. 27, 2001
  33. Wired News, Hot on the Scent of Information Friday, June 8, 2001. Covered also by: ACM TechNews, June 11, 2001.
  34. Information Week, Keep The (Online) Customer Satisfied. Monday, May 21, 2001.
  35. CNET Radio, 910 AM on the dial in SF Bay Area. 2.45pm, Tuesday, May 15th, 2001, Host: Tracy Romine
  36. Associated Press, May 13, 2001. Researchers try to make "scents" out of tangled Web. Coverage by:
  37. The Economist. Scents and Sensibility. April 26, 2001.
  38. Investor Business Daily. Xerox Project Studies Ways People Use Web. March 16, 2001.
  39. Time Magazine. Special Issue on Inventors and Inventions: Team Xerox December 4, 2000.
  40. Ziff-Davis TV Network, Cable Television Channel on Technology. The Internet Archive. August, 2000
  41. The Minnesota Daily, Minneapolis, Minnesota. Plants help scholars understand DNA. Feburary 4, 1997

Patents (Issued: 36)

  1. 8,732,584. System and method for generating an information stream summary using a display metric
  2. 8,725,717. System and method for identifying topics for short text communications
  3. 8,666,979. Recommending interesting content using messages containing URLs
  4. 8,656,286. System and method for providing mixed-initiative curation of information within a shared repository
  5. 8,606,781. Systems and methods for personalized search
  6. 8,504,626. System and method for content tagging and distribution through email
  7. 8,380,743. System and method for supporting targeted sharing and early curation of information
  8. 8,276,060. System and method for annotating documents using a viewer
  9. 8,275,769. System and method for identifying users relevant to a topic of interest
  10. 8,166,056. System and method for searching annotated document collections
  11. 8,140,706. Systems and methods for identifying user types using multi-modal clustering and information scent
  12. 7,882,056. Method and system to predict and recommend future goal-oriented activity
  13. 7,861,186. Systems and methods for navigating page-oriented information assets
  14. 7,779,013. System and method for determining a quantitative measure of search efficiency of related web pages
  15. 7,702,611. Method for automatically performing conceptual highlighting in electronic text
  16. 7,673,019. System and method for determining a quantitative measure of qualitative usability of related Web pages
  17. 7,577,902. Systems and methods for annotating pages of a 3D electronic document
  18. US 7260643 (was US20030018636A1) August 21, 2007. Ed H. Chi, Jeffrey M. Heer, Peter L. Pirolli. Systems and methods for identifying user types using multi-modal clustering and information scent.
  19. US 7203899 April 10, 2007. Ed H. Chi, Peter Pirolli. Systems and Methods for Assessing User Success Rates of Accessing Information in a Collection of Contents
  20. US 7069518B2 June 27, 2006. Stuart Card, Rich Gossweiler, Allison Woodruff, Jock Mackinlay, Lichan Hong, Ed H. Chi. Indexing Methods, Systems, and Computer Program Products for Virtual Three-Dimensional Books.
  21. US 7043475B2 May 9, 2006. Jeffrey Heer, Ed H. Chi. Systems and Methods for Clustering User Sessions Using Multi-Modal Information Including Proximal Cue Information.
  22. US 7043535B2 May 9, 2006. Ed H. Chi, Chris Olston. Systems and Methods for Combined Browsing and Seraching in a Document Collection Based on Information Scent.
  23. US 7043702B2 May 9, 2006. Ed H. Chi, Petr Pirolli, James Pitkow. Method for Visualizing User Path Through a Website and a Path Associated Information Scent.
  24. US 7028053B2 April 11, 2006. Ed H. Chi, Peter Pirolli. Apparatus and Methods for Accessing a Collection of Content Portions.
  25. US 7017110B1 March 21, 2006. Ed H. Chi, Peter Pirolli, James E. Pitkow. System and Method for Inferring User Information Need in a hypermedia Linked Document Collection.
  26. US Patent 6,941,321 September 6, 2005. Hinrich Schuetze, Francine R. Chen, Peter L. Pirolli, James E. Pitkow, Ed H. Chi, Jun Li. System and method for identifying similarities among objects in a collection.
  27. US Patent 6,922,699 B2 July 26, 2005. Hinrich Schuetze, Francine R. Chen, Peter L. Pirolli, James E. Pitkow, Ed H. Chi, Jun Li, Ullas Gargi. System and Method for Quantitatively Representing Data Objects in Vector Space.
  28. US Patent 6,907,459 June 14, 2005. US20020143802 A1. Ed H. Chi, Kim Chen. Systems and methods for predicting usage of a web site using proximal cues.
  29. US Patent 6,671,711 Dec. 30, 2003, EP01108054.6-2201 March 29, 2001. System and method for Predicting Web User Flow by Determining Association Strength of Hypermedia Links
  30. US Patent 6,598,054 July 22, 2003. System and Methods for Clustering Data Objects in a Collection.
  31. US Patent 6,567,797 B1, May 20, 2003. Hinrich Schuetze, James E. Pitkow, Peter Pirolli, Ed H. Chi, Jun Li. System and Method for Providing Recommendations based on Multi-Modal User Clusters.
  32. US Patent 6,564,202, May 13, 2003. Hinrich Schuetze, James E. Pitkow, Peter Pirolli, Ed H. Chi, Jun Li. System and method for visually representing the contents of a multiple data object cluster.
  33. US Patent 6,509,898 B2 (Jan. 21, 2003), EP00950960A2, 10/20/1999. Ed H. Chi, Peter Pirolli, James Pitkow, Rich Gossweller, Jock Mackinlay, Stuart Card. Usage based methods of traversing and displaying generalized graph structures.
  34. US Patent 6,496,832 B2 2002: Visualization Spreadsheet. Ed H. Chi, John T. Riedl, Joseph A. Konston, Phillip J. Barry.
  35. US Patent 6,369,819 Apr. 2002, EP00950962A2, 10/20/1999. Ed H. Chi, James Pitkow, Peter Pirolli, Stuart Card, Jock Mackinlay, Rich Gossweiler. Methods for visualizing transformations among related series of graphs.
  36. US Patent 6,151,595 Nov. 2000, EP00950961A2, 10/20/1999. Methods for interactive visualization of spreading activation using time tubes and disk trees.

Patent-pending: Data incomplete below.

  1. US20060156222A1 G06F, Method for Automatically Performing Conceptual Highlightiong in Electronic Text
  2. US20060622 G06F, Systems and methods for annotating pages of a 3D electronic document
  3. System and method for personalized search