Jagan Sankaranarayananジャガン


Ph.D., 2008



Contact Information

Mail: NEC Labs America
10080 N Wolfe Rd # Sw3350
Cupertino, CA 95014-8505
E-mail:jagan{at}umiacs.umd.edu

Biography & Research

I am the department head of the data management group at NEC Labs America. I got my doctoral degree in Computer Science from the University of Maryland in 2008. My Ph.D. advisor was Prof. Hanan Samet. I got my bachelor's degree from RVCE, Bangalore. I mainly work on database management problems related to GIS, big data, analytics, and mobility. I have received a few awards for my PhD and subsequent work.

This year I am the PC co-chair of ACM SIGPATIAL GIS 2014 and publicity co-chair of ACM SIGMOD 2015. I am also in the editorial board of Distributed and Parallel Databases journal.

Publications [DBLP] [Patents] [Google Scholar]

    1. S. Peng and J. Sankaranarayanan and H. Samet
      SPDO: High-Throughput Road Distance Computations on Spark using Distance Oracles
      In Proceedings of the 32nd IEEE International Conference on Data Engineering (ICDE), Helsinki, Finland, May 2016.

    2. H. Samet and J. Sankaranarayanan and M. D. Lieberman and M. D. Adelfio and B. C. Fruin and J. M. Lotkowski and D. Panozzo and J. Sperling and B. E. Teitler
      Reading news with maps: The power of searching with spatial synonyms.
      Communications of the ACM, 57(10), Oct 2014.
      [link]  (CACM Cover for 2014 October issue. A video special made by CACM.)

    3. J. LeFevre and J. Sankaranarayanan and H. Hacigümüs and J. Tatemura and N. Polyzotis and M. J. Carey
      MISO: souping up big data query processing with a multistore system.
      In Proceedings of the ACM SIGMOD Conference, 2014.

    4. J. LeFevre and J. Sankaranarayanan and H. Hacigümüs and J. Tatemura and N. Polyzotis and M. J. Carey
      Opportunistic physical design for big data analytics.
      In Proceedings of the ACM SIGMOD Conference, 2014.

    5. J. Sankaranarayanan and H. Hacigumus and H. Zhang and M. Sarwat
      SMILE: A data sharing platform for mobile apps in the cloud.
      In Proceedings of the 16th International Conference on Extending Database Technology (EDBT'14), 2014.

    6. H. Samet and J. Sankaranarayanan and M. Auerbach
      Indexing methods for moving object databases: Games and other applications.
      In Proceedings of the ACM SIGMOD Conference, pages 169-180, New York, June 2013.[link]

    7. B. E. Teitler and J. Sankaranarayanan and H. Samet and M. D. Adelfio
      Online document clustering using GPUs.
      In Proceedings of the Second International ADBIS Workshop on GPUs in Databases (GID 2013), Genoa, Italy, September 2013.[link]
      Also University of Maryland Computer Science TR 4970, August 2010.

    8. J. Sankaranarayanan and H. Hacigümüs
      A platform for seamless context transfers in the mobile cloud.
      In MobiDE, pages 13-19, June 2013.

    9. H. Samet and M. D. Adelfio and B. C. Fruin and M. D. Lieberman and J. Sankaranarayanan
      PhotoStand: a map query interface for a database of news photos.
      PVLDB, 6(12):1350-1353, August 2013.[link]
      Also Proceedings of the 39th International Conference on Very Large Data Bases (VLDB)

    10. H. Hacigümüs and J. Sankaranarayanan and J. Tatemura and J. LeFevre and N. Polyzotis
      Odyssey: A multi-store system for evolutionary analytics.
      PVLDB, 6, August 2013.

    11. J. LeFevre and J. Sankaranarayanan and H. Hacigümüs and J. Tatemura and N. Polyzotis
      Towards a workload for evolutionary analytics.
      In SIGMOD Workshop on Data Analytics in the Cloud (DanaC), 2013.
      Extended version CoRR abs/1304.1838

    12. J. LeFevre and J. Sankaranarayanan and H. Hacigümüs and J. Tatemura and N. Polyzotis
      Towards a workload for evolutionary analytics (extended version).
      CoRR, abs/1304.1838, 2013.

    13. Jeff LeFevre and J. Sankaranarayanan and Hakan Hacigümüs and J. Tatemura and N. Polyzotis and M. J. Carey
      Exploiting opportunistic physical design in large-scale data analytics.
      CoRR, abs/1303.6609, 2013.

    14. S. Al-Kiswany and H. Hacigümüs and Z. Liu and J. Sankaranarayanan
      Cost exploration of data sharings in the cloud.
      In Proceedings of the 16th International Conference on Extending Database Technology (EDBT'13), pages 601-612, March 2013.

    15. B. C. Fruin and H. Samet and J. Sankaranarayanan
      Tweetphoto: photos from news tweets.
      In I. Cruz, C. A. Knoblock, P. Kröger, E. Tanin, and P. Widmayer, editors, Proceedings of the 20th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, pages 582-585, Redondo Beach, CA, November 2012.[link]

    16. J. Sankaranarayanan and H. Hacigümüs and J. Tatemura
      Cosmos: A platform for seamless mobile services in the cloud.
      In MDM, pages 303-312, 2011.

    17. A. Jackoway and H. Samet and J. Sankaranarayanan
      Identification of live news events using Twitter.
      In Y. Zheng and M. F. Mokbel, editors, Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Location-Based Social Networks (LBSN'11), pages 25-32, Chicago, November 2011.[link]

    18. R. Gopalan and J. Sankaranarayanan
      Max-margin clustering: Detecting margins from projections of points on lines.
      In CVPR, pages 2769-2776, June 2011.

    19. B. E. Teitler and J. Sankaranarayanan and H. Samet
      Online document clustering using the GPU.
      Technical Report TR-4970, Computer Science Department, University of Maryland, College Park, MD, August 2010.[link]

    20. J. Sankaranarayanan and H. Samet
      Roads belong in databases.
      IEEE Data Engineering Bulletin, 33(2):4-11, June 2010.[link]
      Invited paper.

    21. J. Sankaranarayanan and H. Samet
      Images in news.
      In Proceedings of the 24th International Conference on Pattern Recognition, pages 3240-3243, Istanbul, Turkey, August 2010.[link]

    22. J. Sankaranarayanan and H. Samet
      Query processing using distance oracles for spatial networks.
      IEEE Transactions on Knowledge and Data Engineering, 22(8):1158-1175, August 2010.[link]
      Best Papers of ICDE 2009 Special Issue

    23. G. Quercini and H. Samet and J. Sankaranarayanan and M. D. Lieberman
      Determining the spatial reader scopes of news sources using local lexicons.
      In A. El Abbadi, D. Agrawal, M. Mokbel, and P. Zhang, editors, Proceedings of the 18th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, pages 43-52, San Jose, CA, November 2010.[link]

    24. M. D. Lieberman and H. Samet and J. Sankaranarayanan
      Geotagging: Using proximity, sibling, and prominence clues to understand comma groups.
      In R. Purves, C. Jones, and P. Clough, editors, Proceedings of 6th Workshop on Geographic Information Retrieval, page 6, Zurich, Switzerland, February 2010.[link]

    25. M. D. Lieberman and H. Samet and J. Sankaranarayanan
      Geotagging with local lexicons to build indexes for textually-specified spatial data.
      In Proceedings of the 26th IEEE International Conference on Data Engineering, pages 201-212, Long Beach, CA, March 2010.[link]

    26. J. Sankaranarayanan and H. Samet and B. Teitler and M. D. Lieberman and J. Sperling
      TwitterStand: News in tweets.
      In D. Agrawal, W. G. Aref, C.-T. Lu, M. F. Mokbel, P. Scheuermann, C. Shahabi, and O. Wolfson, editors, Proceedings of the 17th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, pages 42-51, Seattle, WA, November 2009.[link]

    27. J. Sankaranarayanan and H. Samet and H. Alborzi
      Path oracles for spatial networks.
      PVLDB, 2(1):1210-1221, August 2009.[link]
      Also Proceedings of the 35th International Conference on Very Large Data Bases (VLDB)

    28. J. Sankaranarayanan and H. Samet
      Distance oracles for spatial networks.
      In Proceedings of the 25th IEEE International Conference on Data Engineering, pages 652-663, Shanghai, China, April 2009.[link]

    29. H. Samet and B. E. Teitler and M. D. Lieberman and J. Sankaranarayanan and D. Panozzo and J. Sperling
      Reading news with maps: The power of searching with spatial synonyms.
      Technical report, Computer Science Department, University of Maryland, College Park, MD, 2009.[link]
      submitted for publication

    30. M. D. Lieberman and H. Samet and J. Sankaranarayanan and J. Sperling
      Spatio-textual spreadsheets: Geotagging via spatial coherence.
      In D. Agrawal, W. G. Aref, C.-T. Lu, M. F. Mokbel, P. Scheuermann, C. Shahabi, and O. Wolfson, editors, Proceedings of the 17th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, pages 524-527, Seattle, WA, November 2009.[link]

    31. B. Teitler and M. D. Lieberman and D. Panozzo and J. Sankaranarayanan and H. Samet and J. Sperling
      NewsStand: A new view on news.
      In W. G. Aref, M. F. Mokbel, H. Samet, M. Schneider, C. Shahabi, and O. Wolfson, editors, Proceedings of the 16th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, pages 144-153, Irvine, CA, November 2008.[link]

    32. J. Sankaranarayanan
      Scalable query processing on spatial networks.
      PhD thesis, University of Maryland, College Park, MD, April 2008.

    33. H. Samet and J. Sankaranarayanan and H. Alborzi
      Scalable network distance browsing in spatial databases.
      In Proceedings of the ACM SIGMOD Conference, pages 43-54, Vancouver, Canada, June 2008.[link]
      Also see University of Maryland Computer Science Technical Report TR-4865, April 2007

    34. M. D. Lieberman and J. Sankaranarayanan and H. Samet and J. Sperling
      Augmenting spatio-textual search with an infectious disease ontology.
      In Proceedings of the Workshop on Information Integration Methods, Architectures, and Systems (IIMAS08) (ICDE Workshops 2008), pages 266-269, Cancun, Mexico, April 2008.[link]

    35. M. D. Lieberman and J. Sankaranarayanan and H. Samet
      A fast similarity join algorithm using graphics processing units.
      In Proceedings of the 24th IEEE International Conference on Data Engineering, pages 1111-1120, Cancun, Mexico, April 2008.[link]

    36. J. Sankaranarayanan and H. Samet and A. Varshney
      A fast all nearest neighbor algorithm for applications involving large point-clouds.
      Computers & Graphics, 31(2):157-174, April 2007.[link]

    37. H. Samet and J. Sankaranarayanan and H. Alborzi
      Scalable network distance browsing in spatial databases.
      Computer Science Technical Report TR-4865, University of Maryland, College Park, MD, April 2007.
      Also in Proceedings of the SIGMOD'08 Conference, pages 43-54, Vancouver, Canada, June 2008

    38. H. Samet and A. Phillippy and J. Sankaranarayanan
      Knowledge discovery using the SAND spatial browser.
      In Proceedings of the 7th National Conference on Digital Government Research, pages 284-285, Philadelphia, PA, May 2007.[link]

    39. H. Samet and M. D. Lieberman and J. Sankaranarayanan and J. Sperling
      STEWARD: Demo of spatio-textual extraction on the web aiding the retrieval of documents.
      In Proceedings of the 7th National Conference on Digital Government Research, pages 300-301, Philadelphia, PA, May 2007.[link]

    40. M. D. Lieberman and H. Samet and J. Sankaranarayanan and J. Sperling
      STEWARD: architecture of a spatio-textual search engine.
      In H. Samet, M. Schneider, and C. Shahabi, editors, Proceedings of the 15th ACM International Symposium on Advances in Geographic Information Systems, pages 186-193, Seattle, WA, November 2007.[link]

    41. J. Sankaranarayanan and H. Samet and A. Varshney
      Fast k-neighborhood algorithm for large point-clouds.
      In M. Botsch, B. Chen, M. Pauly, and M. Zwicker, editors, Proceedings of the 3rd IEEE/Eurographics Symposium on Point-Based Graphics, pages 75-84, Boston, July 2006.[link]

    42. J. Sankaranarayanan and H. Alborzi and H. Samet
      Distance join queries on spatial networks.
      In Proceedings of the 14th ACM International Symposium on Advances in Geographic Information Systems, pages 211-218, Arlington, VA, November 2006.[link]

    43. J. Sankaranarayanan and H. Alborzi and H. Samet
      Enabling query processing on spatial networks.
      In Proceedings of the 22nd IEEE International Conference on Data Engineering, page 163, Atlanta, GA, April 2006.[link]

    44. J. Sankaranarayanan and H. Alborzi and H. Samet
      Efficient query processing on spatial networks.
      In Proceedings of the 13th ACM International Symposium on Advances in Geographic Information Systems, pages 200-209, Bremen, Germany, November 2005.[link]

    45. H. Samet and F. Brabec and J. Sankaranarayanan
      Importing abstract spatial data into the SAND database system.
      In Proceedings of the 4th National Conference on Digital Government Research, pages 285-286, Seattle, WA, May 2004.[link]

    46. J. Sankaranarayanan and E. Tanin and H. Samet and F. Brabec
      Accessing diverse geo-referenced data sources with the SAND spatial DBMS.
      In Proceedings of the 3rd National Conference on Digital Government Research, pages 331-334, 297, Boston, MA, May 2003.[link]
Miscellaneous Links (old demos mostly)
  1. Distance oracle demo by Shangfu Peng (~2015) http://sametnginx.umiacs.umd.edu/oracle/demo.html
  2. Video special made by Communications of the ACM on NewsStand (~2014)

  3. If you like news, here is a news channel powered by Twitterstand technology (~2009). Goal is to automatically extract breaking news from Twitter.

  4. Loose quadtree demo (video) by Michael Auerbach (~2013). This data structure is good for high rates of updates like in Games.

  5. Newsstand allows you to read news on a map. Zoom into any part of the world and real local news (~2008). http://newsstand.umiacs.umd.edu