Benjamin C. Markines Contact Information

Syfto 536 Bryant Street Palo Alto, CA

E-mail: [email protected] WWW: www.cs.indiana.edu/~bmarkine

Research Interests

My primary research interests are in Web search and data mining, social Web applications, and social networks. Other interests include computer vision, high performance computing, and anything concerning the Web.

Professional Experience

Syfto, Palo Alto, California USA Chief Scientist March 2011 to Present Designed and implemented the data extraction engine for various data elements (deals and products). Devised a scheme to extract social data (yelp, Twitter, and Facebook) for the various data elements. Created a system to digest the Twitter and Facebook streams. Designed the analytics engine to classify and induce similarity networks of data elements. Implemented multiple recommendation engines ranging from matching (age, gender) to statistical models (Mutual Information, Naive Bayes, joint and conditional probabilities) to vector space methods (TF-IDF, cosine similarity) with technologies such as Mahout, Mallet, Weka, Amazon Elastic MapReduce, and pig. Based on the implementation, real time recommendations are computed in real time. Finally, analyzed the click/view graph of site visitors. ListenLogic, Milpitas, California USA Chief Technology Officer March 2010 to March 2011 Designed and implemented the analytics engine for sentiment, demographic, and topic extraction. Scaled the system to process 5 billion snippets (tweets, blogs, and Facebook posts) a month. International Business Machines, San Jose, California USA Software Engineer August 2001 to Feb 2010 Network File System (NFS) developer for z/OS. Former duties included tools development for z/OS, network storage software development, and performance analysis software for storage servers. Institute for Scientific Interchange Foundation, Torino, Italy Researcher August 2007 to August 2008 Developer of online tools for ranking authors based on the PACS dataset. Continue work on GiveALink.org and other Ph.D. student activities. SBC Global Network, Ameritech, Hoffman Estates, Illinois USA Software Engineer May 2000 to August 2000 Designed and implemented a database for tracking tests of large billing applications.

Education

Indiana University, Bloomington, Indiana USA Ph.D. Computer Science, May, 2009 • Thesis: “Socially Induced Semantic Networks and Applications” • Advisor: Filippo Menczer

Northern Illinois University, DeKalb, Illinois USA M.S. Computer Science, May, 2001 • Concentration in system design and implementation B.S. Computer Science, Cum Laude, December, 1999 Publications

Luca Maria Aiello, Alain Barrat, Rossano Schifanella, Ciro Cattuto, Benjamin Markines, Filippo Menczer. Friendship prediction and homophily in social media. ACM Transactions on the Web (TWEB) Rossano Schifanella, Alain Barrat, Ciro Cattuto, Benjamin Markines, Filippo Menczer. Folks in folksonomies: Social link prediction from shared metadata. Proc. of WSDM 2010 Benjamin Markines, Ciro Cattuto, Filippo Menczer, Dominik Benz, Andreas Hotho, Gerd Stumme. Evaluating Similarity Measures for Emergent Semantics of Social Tagging. Proc. WWW 2009 Benjamin Markines, Ciro Cattuto, Filippo Menczer. Social Spam Detection. Proc. AIRWEB 2009 Benjamin Markines with Jessica Rubart. Socially Induced Semantic Networks and Applications. SIGWEB Newsletter, Autumn (Sept. 2009) Benjamin Markines. Socially Induced Semantic Networks and Applications. Indiana University Computer Science Technical Report TR676. June, 2009 Filippo Radicchi, Santo Fortunato, Benjamin Markines and Alessandro Vespignani. Diffusion of Scientific Credits and the Ranking of Scientists. Physical Review E (2009) Benjamin Markines, Filippo Menczer. A Scalable, Collaborative Similarity Measure for Social Annotation Systems. Poster Proc. HT 2009 Heather Roinestad, John Burgoon, Benjamin Markines, Filippo Menczer. Incentives for Social Annotation. Proc. of SIGIR2009 Demonstrations Heather Roinestad, John Burgoon, Benjamin Markines, Filippo Menczer. Incentives for Social Annotation. Poster Proc. HT 2009 Benjamin Markines, Heather Roinestad, Filippo Menczer. Efficient Assembly of Social Semantic Networks. Proc. HT 2008 (Nominated for Best Paper) Justin Donaldson, Michael Conover, Ben Markines, Heather Roinestad, Filippo Menczer. Visualizing Social Links in Exploratory Search. Proc. HT 2008 Weixia Huang, Katy B¨ orner, Bruce Herr, and Ben Markines. Cyberinfrastructure Shell (CIShell): An OSGi-Based Framework for the Integration of Datasets and Algorithms. EclipseCON 2007, Santa Clara, California Ben Markines, Lubomira Stoilova, and Filippo Menczer. Social Bookmarks for Collaborative Search and Recommendation. Proc. AAAI 2006 Ben Markines, Lubomira Stoilova, and Filippo Menczer. Implicit Tagging using Donated Bookmarks. Proc. WWW 2006 Workshop on Collaborative Web Tagging Ben Markines, Lubomira Stoilova, and Filippo Menczer. GiveALink: A Social Recommendation System. NetSci Conference 2006, Bloomington, Indiana

Lubomira Stoilova, Todd Holloway, Ben Markines, Ana Maguitman, and Filippo Menczer. GiveALink: Mining a Semantic Network of Bookmarks for Web Search and Recommendation. Proc. KDD Workshop on Link Discovery: Issues, Approaches and Applications, 2005 Academic Experience

Indiana University, Bloomington, Indiana USA Research Assistant August 2005 to May 2009 Researcher and lead developer of the GiveALink project. GiveALink is a public site that accepts bookmark donations from the Web community. The bookmarks are analyzed for recommendation, personalization, and visualization. www.givealink.org Research Assistant January 2006 to December 2006 Researcher and software developer for the Network Workbench. A tool designed for network scientists to manage, analyze, and visualize networks. nwb.slis.indiana.edu Graduate Teaching Assistant September 2003 to May 2005 Instructor of programming lab sections as well as holding office hours and grading for the second class in the IU Computer Science undergraduate curriculum. Northern Illinois University, DeKalb, Illinois USA Graduate Teaching Assistant January 2000 to May 2001 Instructor for an introduction to computer science class using the C programming language. Responsibility included proctoring exams, developing machine projects, and grading. Undergraduate Fellowship August 1999 to December 1999 Responsibilities included grading quizzes, exams, and homework in addition to holding office hours.

Professional Service

Program Committee International ACM Conference on Hypertext and Hypermedia (HT 2008, HT 2009) Paper Reviews World Wide Web Journal (2011) Multimedia Tools and Applications (2011,2012) The Computer Journal (2011) Journal of Computer Science and Technology (2011) National Conference on Artificial Intelligence (AAAI 2007) International Annual ACM SIGIR Conference (SIGIR 2006)

Major Projects

GiveALink A social bookmarking site where users may donate bookmarks and find recommendations. The recommendations are created from a collection of bookmarks aggregated together to form a semantic similarity network. www.givealink.org Parallel Graph Visualization Design parallel graph algorithms for visualization. www.boost.org/libs/graph/doc/index.html Augmented SimCity Development of an augmented reality application based on SimCity. Evaluated technologies such as ARToolkit, jARToolkit, and GL4Java.

Fluency Enable non-programmers to develop their own applications without knowledge of a computer programming language. fluency.knownspace.org Topical Crawlers Develop and evaluate topical crawlers using support vector machines, na¨ıve bayes, and cosine similarity to classify Webpages. Three dimensional Wavelet Compression Applying Wavelet compression to a three dimensional dataset, i.e., a movie. Honors and Activities

Iota Nu Phi Honor Society. Demos on sixearch.org and givealink.org at CSI Piemonte Complexity Conference, Torino, Italy. Invited speaker, Theoretical Aspects and Models of Large, Complex and Open Information Networks, ISI Foundation, Torino, Italy. Invited speaker, satellite workshop Enhancing Social Interaction: Recommendation Systems, Reputation, P2P and Trust, European Conference on Complex Systems (ECCS07), Dresden, Germany. Networks and Complex Systems Open House 2006, Bloomington, Indiana. Presented current research to prospective graduate students and faculty. Intel International Science and Engineering Fair 2006. Indiana Convention Center, Indianapolis, IN. Computer Science Graduate Student Association whip for the 2005/2006 school year. Red Hat Certified Engineer for Red Hat Linux 9 2003. Graduated Cum Laude 1999. Dean’s List in Spring 1998, Fall 1999, Spring 2000, and Fall 2000.

Benjamin C. Markines

Syfto, Palo Alto, California USA. Chief Scientist. March 2011 to Present. Designed and implemented the data extraction engine for various data elements (deals and prod- ucts). Devised a scheme to extract social data (yelp, Twitter, and Facebook) for the various data elements. Created a system to digest the Twitter and ...

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