John (Junghoo) Cho
PROFESSOR
COMPUTER SCIENCE
Boelter Hall 3531H
Email: cho@cs.ucla.eduPhone: (310) 825-6735
Fax: (310) 825-7578
Websites
Junghoo Cho is a professor in the Department of Computer Science at University of California, Los Angeles. He received a Ph.D. degree in Computer Science from Stanford University and a B.S. degree in physics from Seoul National University. His main research interests are in the study of the evolution, management, retrieval and mining of information on the World-Wide Web. He publishes research papers in major international journals and conference proceedings. He serves on program committees of top international conferences, including SIGMOD, VLDB and WWW. He is a recipient of the 10-Year Best-Paper Award at VLDB 2010, NSF CAREER Award, IBM Faculty Award, Okawa Research Award and Northrop Grunmann Excellence in Teaching Award.
RESEARCH AND INTERESTS
- Internet search engines
- Database systems
- Information  management systems
- Digital libraries
- Large-scale internet data management
NOTABLE PUBLICATIONS
Journal Publications
- Feng Feng, Junghoo Chob, Witold Pedryczc, Hamido Fujitae, Tutut Herawan "Soft set based association rule mining." Knowledge-Based Systems, 111: 268-282 (November 2016).
- Jun-Seok Heo, Junghoo Cho, Kyu-Young Whang "Subspace top-k query processing using the hybrid-layer index with a tight bound." Data and Knowledge Engineering, 83: 1-19 (2013).
- Ka Cheung Sia, Junghoo Cho, Hyun-Kyu Cho "Efficient Monitoring Algorithm for Fast News Alerts." IEEE Transactions on Knowledge and Data Engineering, 19(7): July 2007.
- Panagiotis G. Ipeirotis, Alexandros Ntoulas, Junghoo Cho, Luis Gravano "Modeling and Managing Content Changes in Text Databases." ACM Transactions on Database Systems, 32(3): June 2007.
- Alexandros Ntoulas, Gerald Chao, Junghoo Cho "The Infocious Web Search Engine: Improving Web Searching through Linguistic Analysis." Journal of Digital Information Management.
- Junghoo Cho, Hector Garcia-Molina, Taher Haveliwala, Wang Lam, Andreas Paepcke, Sriram Raghavan, Gary Wesley "Stanford WebBase Components and Applications." ACM Transactions on Internet Technology, 6(2): May 2006.
- Junghoo Cho, Hector Garcia-Molina "Effective page refresh policies for Web crawlers." ACM Transactions on Database Systems, 28(4): December 2003.
- Junghoo Cho, Hector Garcia-Molina "Estimating frequency of change." ACM Transactions on Internet Technology, 3(3): August 2003.
- Arvind Arasu, Junghoo Cho, Hector Garcia-Molina, Andreas Paepcke, Sriram Raghavan "Searching the Web." ACM Transactions on Internet Technology, 1(1): August 2001.
- Onn Brandman, Junghoo Cho, Hector Garcia-Molina, Narayanan Shivakumar "Crawler-Friendly Web Servers." ACM SIGMETRICS Performance Evaluation Review, 28(2): September 2000.
- Andreas Paepcke, Hector Garcia-Molina, Gerard Rodriquez-Mula, Junghoo Cho "Beyond Document Similarity: Understanding Value-Based Search and Browsing Technologies." SIGMOD Records, 29(1): March 2000.
- Sougata Mukherjea, Junghoo Cho "Automatically Determining Semantics for World Wide Web Multimedia Information Retrieval." Journal of Visual Languages and Computing (JVLC), 10(6): December 1999, 585-606.
- Junghoo Cho, Hector Garcia-Molina, Lawrence Page "Efficient Crawling Through URL Ordering." Computer Networks and ISDN Systems, 30(1-7):161-172, 1998
- Yuchen Liu, Dmitry Chechik, Junghoo Cho: Power of Human Curation in Recommendation System. WWW 2016: 79-80
- Bin Bi, Junghoo Cho: Modeling a Retweet Network via an Adaptive Bayesian Approach. WWW 2016: 459-469
- Chu-Cheng Hsieh, James Neufeld, Tracy Holloway King, Junghoo Cho: Efficient approximate thompson sampling for search query recommendation. SAC 2015: 740-746
- Youngchul Cha, Keng-hao Chang, Hari Bommaganti, Ye Chen, Tak W. Yan, Bin Bi, Junghoo Cho: A universal topic framework (UniZ) and its application in online search. SAC 2015: 1078-1085
- Bin Bi, Hao Ma, Bo-June Paul Hsu, Wei Chu, Kuansan Wang, Junghoo Cho: Learning to Recommend Related Entities to Search Users. WSDM 2015: 139-148
- Youngchul Cha, Junghoo Cho, Jian Yuan, Tak W. Yan: Exploration of the effect of Category Match Score in search advertising. ICDE 2014: 1156-1161
- Bin Bi, Ben Kao, Chang Wan, Junghoo Cho: Who are experts specializing in landscape photography?: analyzing topic-specific authority on content sharing services. KDD 2014: 1506-1515
- Bin Bi, Yuanyuan Tian, Yannis Sismanis, Andrey Balmin, Junghoo Cho "Scalable Topic-Specific Influence Analysis on Microblogs" In Proceedings of the International ACM WSDM Conference (WSDM), February 2014.
- Youngchul Cha, Bin Bi, Chu-Cheng Hsieh, Junghoo Cho "Incorporating Popularity in Topic Models for Social Network Analysis" In Proceedings of the International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR), July 2013.
- Youngchul Cha, Junghoo Cho "Social-network analysis using topic models" In Proceedings of the International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR), August 2012.
- Chu-Cheng Hsieh, Junghoo Cho "Finding similar items by leveraging social tag clouds" In Proceedings of the ACM Symposium on Applied Computing (SAC), March 2012.
- Michael Welch, Junghoo Cho, Christopher Olston "Search Result Diversity for Informational Queries" In Proceedings of the 20th International World Wide Web Conference (WWW), March 2011.
- Michael J. Welch, Uri Schonfeld, Dan He, Junghoo Cho "Topical Semantics of Twitter Links" In Proceedings of the 4th ACM International Conference on Web Search and Data Mining (WSDM), February 2011.
- Tuan M. V. Le, Tru H. Cao, Son M. Hoang, Junghoo Cho "Ontology-based proximity search" In Proceedings of the 13th International Conference on Information Integration and Web-based Applications and Services (iiWAS), December 2011.
- Michael J. Welch, Junghoo Cho, Walter Chang "Generating Advertising Keywords from Video Content" In Proceedings of the 19th International Conference on Information and Knowledge Management (CIKM), October 2010.
- Jun-Seok Heo, Junghoo Cho, Kyu-Young Whang "The Hybrid-Layer Index: A Synergic Approach to Answering Top-k Queries in Arbitrary Subspaces" In Proceedings of the 26th IEEE International Conference on Data Engineering (ICDE), March 2010.
- Ahmed Hassan, Dragomir Radev, Junghoo Cho, Amruta Joshi "Content-Based Recommendation and Summarization in the Blogosphere" In Proceedings of the 3rd Internationl AAAI Conference on Weblogs and Social Media, May 2009.
- Ka Cheung Sia, Junghoo Cho, Yun Chi, Belle L. Tseng "Efficient Computation of Personal Aggregate Queries on Blogs" In Proceedings of the ACM SIGKDD International Conference on Knowledge Discovery & Data Mining (KDD), August 2008.
- Michael J. Welch, Junghoo Cho "Automatically identifying localizable queries" In Proceedings of the International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR), July 2008.
- Gong Chen, Junghoo Cho, Mark H. Hansen "On the brink: searching for drops in sensor data" In Proceedings of the International Conference on Extending Database Technology (EDBT), March 2008.
- Junghoo Cho, Uri Schonfeld "RankMass Crawler: A Crawler with High Personalized PageRank Coverage Guarantee" In Proceedings of the International Conference on Very Large Databases (VLDB), September 2007.
- Alexandros Ntoulas, Junghoo Cho "Pruning Policies for Two-Tiered Inverted Index with Correctness Guarantee." In Proceedings of the Annual International ACM SIGIR Conference, July 2007.
- Sasank Reddy, Gong Chen, Brian Fulkerson, Sung Jin Kim, Unkyu Park, Nathan Yau, Junghoo Cho, Mark Hansen, John Heidemann "Sensor-Internet Share and Search - Enabling Collaboration of Citizen Scientists." In Proceedings of the Information Processing in Sensor Networks, April 2007.
- Rodrigo B. Almeida, Barzan Mozafari, Junghoo Cho "On the Evolution of Wikipedia." In Proceedings of the International Conference on Weblogs and Social Media, March 2007.
- Ka Cheung Sia, Junghoo Cho, Koji Hino, Yun Chi, Shenghuo Zhu, Belle Tseng "Monitoring RSS Feeds based on User Browsing Pattern." In Proceedings of the International Conference on Weblogs and Social Media, March 2007.
- Feng Qiu, Junghoo Cho "Automatic Identification of User Interest for Personalized Search." In Proceedings of the World-Wide Web Conference (WWW), May 2006.
- Uichin Lee, Min Choi, Junghoo Cho, M. Y. Sanadidi, Mario Gerla "Understanding Pollution Dynamics in P2P File Sharing" In Proceedings of the International Workshop on Peer-to-Peer Syst ems (IPTPS), February 2006.
- Sandeep Pandey, Sourashis Roy, Christopher Olston, Junghoo Cho, Soumen Chakrabarti "Shuffling a Stacked Deck: The Case for Partially Randomized Ranking of Search Engine Results" In Proceedings of the International Conference on Very Large Databases (VLDB), September 2005.
- Junghoo Cho, Sourashis Roy, Robert E. Adams "Page Quality: In Search of an Unbiased Web Ranking." In Proceedings of ACM International Conference on Management of Data (SIGMOD), June 2005.
- Feng Qiu, Zhenyu Liu, Junghoo Cho "Analysis of User Web Traffic with a Focus on Search Activities." In Proceedings of the International Workshop on the Web and Databases (WebDB), June 2005.
- Alexandros Ntoulas, Petros Zerfos, Junghoo Cho "Downloading Textual Hidden Web Content by Keyword Queries" In Proceedings of the Joint Conference on Digital Libraries (JCDL), June 2005.
- Uichin Lee, Zhenyu Liu, Junghoo Cho "Automatic Identification of User Goals in Web Search." In Proceedings of the World-Wide Web Conference (WWW), May 2005.
- Alexandros Ntoulas, Gerald Chao, Junghoo Cho "The Infocious Web Search Engine: Improving Web Searching through Linguistic Analysis." In Proceedings of the World-Wide Web Conference (WWW), May 2005.
- Alexandros Ntoulas, Junghoo Cho, Hyun Kyu Cho, Hyeonsung Cho, Young-Jo Cho "A study on the evolution of the Web." In Proceedings of the UKC Conference, August 2005.
- Panagiotis G. Ipeirotis, Alexandros Ntoulas, Junghoo Cho, Luis Gravano "Modeling and Managing Content Changes in Text Databases." In Proceedings of the International Conference on Data Engineering (ICDE), March 2005.
- Zhenyu Liu, Ka Cheung Sia, Junghoo Cho "Cost-Efficient Processing of Min/Max Queries over Distributed Sensors with Uncertainty" In Proceedings of the Annual ACM Symposium on Applied Computing (SAC), March 2005.
- Junghoo Cho, Sourashis Roy "Impact of Web Search Engines on Page Popularity." In Proceedings of the World-Wide Web Conference (WWW), May 2004.
- Alexandros Ntoulas, Junghoo Cho, Christopher Olston "What's New on the Web? The Evolution of the Web from a Search Engine Perspective." In Proceedings of the World-Wide Web Conference (WWW), May 2004.
- Zhenyu Liu, Chang Luo, Junghoo Cho and Wesley W. Chu "A Probabilistic Approach to Metasearching with Adaptive Probing." In Proceedings of the International Conference on Data Engineering (ICDE), March 2004.
- Junghoo Cho "Frontiers in Web Data Management." In Information and Communication Technology Symposium (ICTS'03), August 2003.
- Junghoo Cho, Alexandros Ntoulas "Effective Change Detection Using Sampling." In Proceedings of the International Conference on Very Large Databases (VLDB), September 2002.
- Junghoo Cho and Hector Garcia-Molina "Parallel Crawlers." In Proceedings of the World Wide Web conference (WWW), Honolulu, Hawaii, May 2002.
- Junghoo Cho, Sridhar Rajagopalan "A Fast Regular Expression Indexing Engine." In Proceedings of the Internatioinal Conference on Data Engineering (ICDE), February 2002.
- Junghoo Cho, Hector Garcia-Molina "Synchronizing a database to Improve Freshness." In Proceedings of ACM International Conference on Management of Data (SIGMOD), May 2000.
- Junghoo Cho, Narayanan Shivakumar, Hector Garcia-Molina "Finding replicated Web collections." In Proceedings of ACM International Conference on Management of Data (SIGMOD), May 2000.
- Junghoo Cho, Hector Garcia-Molina "The Evolution of the Web and Implications for an incremental Crawler." In Proceedings of the International Conference on Very Large Databases (VLDB), September 2000.
- Junghoo Cho, Sougata Mukherjea "Crawling Images on the Web." In Proceedings of Third International Conference on Visual Information Systems (Visual99), Amsterdam, The Netherlands, June 1999.
- Junghoo Cho, Hector Garcia-Molina, Lawrence Page "Efficient Crawling Through URL Ordering." In Proceedings of the the World Wide Web conference (WWW), Brisbane, Australia, April 1998.
- Onn Brandman, Junghoo Cho, Hector Garcia-Molina, Narayanan Shivakumar "Crawler-Friendly Web Servers." In Proceedings of the Workshop on Performance and Architecture of Web Servers (PAWS), held in conjunction with ACM SIGMETRICS 2000, Santa Clara, California, June 2000.
- Orkut Buyukokkten, Junghoo Cho, Hector Garcia-Molina, Luis Gravano, Narayanan Shivakumar "Exploiting geographical location information of web pages." In Proceedings of Workshop on Web Databases (WebDB'99) held in conjunction with ACM SIGMOD'99, June 1999.
- Joachim Hammer, Hector Garcia-Molina, Junghoo Cho, Arturo Crespo, Rohan Aranha "Extracting Semistructured Information from the Web." In Proceedings of the Workshop on Management of Semistructured Data held in conjunction with ACM SIGMOD'97, pages 18-25, May 1997.
- Junghoo Cho "Crawling the Web: Discovery and Maintenance of a Large-Scale Web Data." Ph.D. thesis, Stanford University.
- Junghoo Cho, Hector Garcia-Molina "WebBase and Stanford Digital Library Project" (Extended Abstract) 2000 Kyoto International Conference on Digital Libraries, Kyoto, Japan, November 2000.
EDUCATION
PhD (2002) Stanford University (Computer Science), BS (Physics) Seoul National University
AWARDS AND RECOGNITION
- Best Paper Runner Up, SIGIR 2013
- 10-Year Best Paper Award, VLDB 2010
- Dr. Stevenson Award for the Best Faculty-In-Residence, 2010
- Northrop Grumman Excellence in Teaching Award, 2006
- Okawa Foundation Research Award, 2006
- IBM Faculty Award, 2005
- Best Paper Award, ICDE 2005
- National Science Foundation CAREER Award, 2004
- Best Paper Runner Up, WWW 2004
- KFAS (Korea Foundation for Advanced Study) Fellowship, 1998-2001
- Stanford Engineering School Fellowship, 1996
- GE (General Electric) Fellowship, 1994