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Mohamed F. Mokbel Assistant Professor Department of Computer Science and Engineering, University of Minnesota Twin Cities 4-192 EE/CS Building (Office 4-207) 200 Union Street SE, Minneapolis, MN, 55455 Phone: (612) 626-3025 www.cs.umn.edu/~mokbel (mokbel@cs.umn.edu) -______________________________________________________________________________________
Research Interests: Databases, location-based services, data stream management systems, spatio-temporal databases, continuous query processing, indexing techniques, adaptive query optimization, data privacy. _______________________________________________________________________________________
Education: Ph.D. 2005. Computer Science, Purdue University, West Lafayette, IN. M.S. 1999, B.S 1996. Computer Science, Faculty of Engineering, Alexandria University, Egypt. _______________________________________________________________________________________
Students: Chi-Yin Chow, Mohamed Khalefa, Justin Levandoski _______________________________________________________________________________________
Teaching: Fall 2008: CSCI 4041: Algorithms and Data Structures Spring 2008: CSCI 5708: Architecture and Implementation of Database Systems Fall 2007: CSCI 8735: Advanced Database Systems Spring 2007: CSCI 5708: Architecture and Implementation of Database Systems Fall 2006: CSCI 4707: Practice of Database Systems Spring 2006: CSCI 5980: New Trends in Database Systems _______________________________________________________________________________________
Tutorials: 1. Mohamed F. Mokbel Privacy in Location-Based Services: State-of-the-Art and Research Directions. In IEEE International Conference on Mobile Data Management, MDM 2007, Mannheim, Germany May 2007. 2. Mohamed F. Mokbel and, Walid G. Aref, Location-aware Query Processing and Optimization. In IEEE International Conference on Mobile Data Management, MDM 2007, Mannheim, Germany May 2007. 3. Mohamed F. Mokbel Privacy in Location Services: State-of-the-Art and Research Directions. In ACM International Conference on Computer and Communication Security, CCS 2007, Alexandria, VA, Oct, 2007. 4. Mohamed F. Mokbel and, Walid G. Aref, Location-aware Query Processing. In International Conference on Extending Database Technology, EDBT 2006, Munich, Germany. _______________________________________________________________________________________
Refereed System Demonstrations: 1. Chi-Yin Chow, Mohamed F. Mokbel, and Tian He. TinyCasper: A Privacy-Preserving Aggregate Location Monitoring System in Wireless Sensor Networks. In Proceedings of 2008 ACM SIGMOD Conference on Management of Data, Vancouver, Canada, Jun., 2008. (acceptance rate 31.9%). Demo Video: (Part1) 2. Mohamed F. Mokbel, Chi-Yin Chow and Walid G. Aref. The New Casper: A Privacy-Aware Location-Based Database Server. In Proceedings of the International Conference of Data Engineering. ICDE 2007, Istanbul, Turkey, pp. 1499-1500, Apr. 2007. (acceptance rate 38.3%). Demo Video: (Part1) 3. David Lomet, Roger Barga, Mohamed F. Mokbel, German Shegalov, Rui Wang, Yunyue Zhu. Immortal DB: Transaction Time Support for SQL Server. In Proceedings of 2005 ACM SIGMOD Conference on Management of Data, Baltimore, MD, pp. 939-941, Jun., 2005. (acceptance rate 33.8%). 4. M. H. Ali, Walid G. Aref, Raja Bose, Ahmed Elmagarmid, Abdelsalam Helal, Ibrahim Kamel, Mohamed F. Mokbel. NILE-PDT: A Phenomenon Detection and Tracking Framework for Data Stream Management Systems, In Proceedings of the International Conference on Very Large Data Bases, VLDB 2005, Trondheim, Norway, pp. 1295-1298, Aug., 2005. (acceptance rate 42%). Demo Video: (Part1) 5. Mohamed F. Mokbel, Xiaopeng Xiong, Walid G. Aref, Susanne E. Hambrusch, Sunil Prabhakar, Moustafa A. Hammad. PLACE: A Query Processor for Handling Real-time Spatio-temporal Data Streams. In Proc. of the Intl. Conference on Very Large Data Bases, VLDB 2004, Toronto, Canada, pp. 1377-1380, Aug., 2004. (acceptance rate 39.5%). (Poster) 6. Moustafa A. Hammad, Mohamed F. Mokbel, Mohamed H. Ali, Walid G. Aref, A. C. Catlin, Ahmed Elmagarmid, Mohamed Eltabakh, Mohamed G. Elfeky, Thanaa M. Ghanem, Robert Gwadera, Ihab F. Ilyas, Mirette Marzouk, Xiaopeng Xiong. Nile: A Query Processing Engine for Data Streams. In Proc. of the International Conference of Data Engineering, ICDE 2004, Boston, MA, pp. 861, Apr., 2004. Demo Video: (Part1) (Part2) (Part3) (Part4) _______________________________________________________________________________________
Professional Services: Co-Organizer: International Workshop on Privacy-Aware Location-based Mobile Services, PALMS, 2008 International Workshop on Privacy-Aware Location-based Mobile Services, PALMS, 2007 PC Co-chair: ACM SIGSPATIAL International Conference on Advances in Geographic Systems, ACM GIS, 2008 International Workshop on Privacy-Aware Location-based Mobile Services, PALMS, 2007, 2008 ACS/IEEE International Conf on Comp. Syst. and Applications, DB and Data Mining Track, AICCSA, 2007 PC Member: SIAM International Conference on Data Mining, SDM, 2009 Pacific-Asia Conference on Knowledge Discovery and Data Mining, PAKDD, 2009 IEEE International Conference on Data Mining, ICDM, 2008 IEEE International Conference on Distributed Computing Systems, ICDCS, 2008 IEEE International Conference on Data Engineering, ICDE, 2006, 2007 International Symposium on Spatial and Temporal Databases, SSTD, 2007 ACM International Symposium on Advances in Geographic Systems, ACM GIS, 2007 International Conference of Mobile Data Management, MDM, 2008 International Conference on Scientific and Statistical Database Management, SSDBM, 2008 International Conference on Cooperative Information Systems, CoopIS, 2008 International Database Engineering & Applications Symposium, IDEAS, 2007, 2008 IEEE International Conference On Advanced Video and Signal Based Surveillance, AVSS, 2008 IEEE International Conference on Information Reuse and Integration, IRI, 2008 IEEE International Conference on Computational Science and Engineering, CSE, 2008 Australasian Database Conference, ADC, 2008 ACM Symposium on Applied Computing, Mobile Computing and Application Track, SAC, 2007, 2008 ACM SIGSPATIAL International Workshop on Security and Privacy in GIS and LBS, SPRINGL, 2008 International Workshop on Scalable Steam Processing Systems, SSPS, 2007, 2008 IEEE International Conference on Intelligent Transportation Systems, IEEE ITSC, 2007 International Conference on Scalable Information Systems, INFOSCALE, 2007 International Workshop on Data Management in Ubiquitous Computing, DMUC, 2007 International Workshop on Spatial and Spatio-temporal Data Mining, SSTDM, 2006 International Workshop on INformation Processing over Evolving Networks, WINPEN, 2006 EDBT Ph.D. Workshop, 2006, 2008 Journal Reviewer: ACM Transactions on Database Systems, TODS, 2005, 2008 IEEE Transactions on Knowledge and Data Engineering, TKDE, 2005, 2006, 2007, 2008 IEEE Transactions on Computers, 2007, 2008 IEEE Transactions on Mobile Computing, TMC, 2007, 2008 IEEE Transactions on Parallel and Distributed Systems, TPDS, 2005, 2007 Springer VLDB Journal, 2007 Springer International Journal of Knowledge and Information Systems, KAIS, 2007 Springer GeoInformatica, 2005, 2006, 2007 Springer Distributed and Parallel Databases, DAPD, 2007 Springer Journal of Computer Science and Technology, JCST, 2007 Taylor & Francis International Journal of GIS, 2006, 2007 Taylor & Francis Journal of LBS, 2007 Elsevier Data & Knowledge Engineering Journal, DKE, 2007, 2008 Elsevier Information Processing Letters, 2007 Elsevier Information Sciences, 2006 ETRI Journal, 2006, 2007 ________________________________________________________________________
PUBLICATIONS: (DBLP) (Citeseer) 1. Mohamed F. Mokbel and Walid G. Aref SOLE: Scalable On-Line Execution of Continuous Queries on Spatio-temporal Data Streams. VLDB Journal. To appear, 2008 2. Mohamed Khalefa, Mohamed F. Mokbel, and Justin Levandoski. "Skyline Query Processing for Incomplete Data". In Proceedings of the International Conference of Data Engineering. ICDE 2008, Cancun, Mexico, Apr. 2008. (full paper full presentation, acceptance rate 12.1%). 3. Reynold Cheng, Jinchuan Chen, Mohamed F. Mokbel, and Chi-Yin Chow Probabilistic Verifiers: Evaluating Constrained Nearest-Neighbor Queries over Uncertain Data". In Proceedings of the International Conference of Data Engineering. ICDE 2008, Cancun, Mexico, Apr. 2008. (full paper full presentation, acceptance rate 12.1%). 4. Justin Levandoski, Mohamed Khalefa, Mohamed F. Mokbel "PermJoin: An Efficient Algorithm for Producing Early Results in Multi-join Query Plans. In Proceedings of the International Conference of Data Engineering. ICDE 2008, Cancun, Mexico, Apr. 2008. (short paper, acceptance rate 31%). 5. Biplob Debnath, Mohamed F. Mokbel, David Lilja . SARD: A Statistical Approach for Ranking Database Tuning Parameters. In Proceedings of the Third International Workshop on Self-Managing Database Systems, SMDB 2008, co-located with ICDE, Cancun, Mexico, Apr., 2008.. 6. Biplob K. Debnath, Mohamed F. Mokbel and David J. Lilja Exploiting the Impact of Database System Configuration Parameters: A Design of Experiments Approach, IEEE Data Engineering Bulletin, 31(1), pp. 3-10, Mar., 2008. (Invited paper). 7. Aravindan Raghuveer, Meera Jindal, Mohamed Mokbel, Biplob Debnath, and David Du. Towards Efficient Search on Unstructured Data: An Intelligent-Storage Approach. In Proceedings of the International Conference on Information and Knowledge Management, CIKM 2007, Lisboa, Portugal, pp. 951-954, Nov., 2007. (short paper, acceptance rate 26%). 8. James A. Skarie, Biplob K. Debnath, David J. Lilja, and Mohamed F. Mokbel. SCRAP: A Statistical Approach for Creating Compact Representational Query Workload based on Performance Bottlenecks. In Proceedings of the IEEE International Symposium on Workload Characterization, IISWC 2007, Boston, MA, Sep., 2007. (acceptance rate 32%). 9. Chi-Yin Chow and Mohamed Mokbel Enabling Private Continuous Queries For Revealed User Locations. In Proceedings of the 10th International Symposium on Spatial and Temporal Databases, SSTD 2007, Boston, MA, pp. 258-275, Jul., 2007. (acceptance rate 34.2%). 10. M. H. Ali, Mohamed F. Mokbel, and Walid G. Aref. Phenomenon-aware Stream Query Processing. In Proceedings of the IEEE International Conference of Mobile Data Management, MDM 2007, Mannheim, Germany May 2007. (acceptance rate 28.5%). 11. James M. Kang, Mohamed F. Mokbel, Shashi Shekhar, Tian Xia, and Donghui Zhang. Continuous Evaluation of Monochromatic and Bichromatic Reverse Nearest Neighbors. In Proceedings of the International Conference of Data Engineering. ICDE 2007, Istanbul, Turkey, pp. 806-815, Apr. 2007. (acceptance rate 18.5%). 12. Thanaa M. Ghanem, Moustafa A. Hammad, Mohamed F. Mokbel, Walid G. Aref, and Ahmed K. Elmagarmid. Incremental Evaluation of Sliding-window Queries over Data Streams. IEEE Transaction of Knowledge and Data Engineering, TKDE, 19(1): 57-72, Jan., 2007 13. Chi-Yin Chow, Mohamed F. Mokbel and Xuan Liu. A Peer-to-Peer Spatial Cloaking Algorithm for Anonymous Location-based Services. In Proceedings of the ACM International Symposium on Advances in Geographic Information Systems, ACM GIS 2006, Arlington, VA, pp. 171-178, Nov., 2006. (acceptance rate 32.3%). 14. Mohamed F. Mokbel, Chi-Yin Chow, Walid G. Aref. The New Casper: Query Processing for Location Services without Compromising Privacy. In Proceedings of the International Conference on Very Large Data Bases, VLDB 2006, Seoul, Korea, pp. 763-774, Sep., 2006. (acceptance rate 13.9%). 15. Mohamed F. Mokbel and Chi-Yin Chow. Challenges in Preserving Location Privacy in Peer-to-Peer Environments. In Proceedings of the International Workshop on Information Processing over Evolving Networks, WINPEN 2006, Hong Kong, June, 2006. (Invited paper). 16. Xiaopeng Xiong, Mohamed F. Mokbel, and Walid G. Aref. LUGrid: Update-tolerant Grid-based Indexing for Moving Objects. In Proceedings of the IEEE International Conference of Mobile Data Management, MDM 2006, Nara, Tokyo, May 2006. (acceptance rate 23%). 17. David Lomet, Roger Barga, Mohamed F. Mokbel, German Shegalov, Rui Wang, Yunyue Zhu. Transaction Time Support inside a Database Engine. In Proceedings of the International Conference of Data Engineering. ICDE 2006, Atlanta, GA. Apr. 2006. (acceptance rate 19.5%). 18. Mohamed F. Mokbel. Towards Privacy-Aware Location-Based Database Servers. In Proceedings of the Second International Workshop on Privacy Data Management, PDM 2006, co-located with ICDE, Atlanta, GA, Apr., 2006. 19. Mohamed F. Mokbel, Xiaopeng Xiong, Moustafa Hammad, and Walid G. Aref. Continuous Query Processing of Spatio-temporal Data Streams in PLACE. GeoInformatica, 9(4), pp. 343-365, Dec., 2005. 20. Mohamed F. Mokbel and Walid G. Aref PLACE: A Scalable Location-aware Database Server for Spatio-temporal Data Streams, IEEE Data Engineering Bulletin, 28(3), pp. 3-10, Sep., 2005. (Invited paper). 21. Hicham G. Elmongui, Mohamed F. Mokbel, and Walid G. Aref, "Spatio-Temporal Histograms", In Proceedings of the 9th International Symposium on Spatial and Temporal Databases, SSTD 2005, Angra dos Reis, Brazil, pp. 19-36, Aug., 2005. (acceptance rate 31.2%). 22. M. H. Ali, Mohamed F. Mokbel, Walid G. Aref, and Ibrahim Kamel. Detection and Tracking of Discrete Phenomena in Sensor-network Databases, In Proceedings of the International Conference on Scientific and Statistical Database Management, SSDBM 2005, Santa Barbara, CA, pp. 163-172, Jul., 2005. 23. Mohamed F. Mokbel, and Walid G. Aref. GPAC: Generic and Progressive Processing of Mobile Queries over Mobile Data. In Proceedings of the IEEE International Conference on Mobile Data Management, MDM 2005, Ayia Napa, Cyprus, pp. 155-163, May 2005. (acceptance rate 24.7%). 24. Xiaopeng Xiong, Mohamed F. Mokbel, and Walid G. Aref. SEA-CNN: Scalable Processing of Continuous K-Nearest Neighbor Queries in Spatio-temporal Databases. In Proceedings of the International Conference of Data Engineering. ICDE 2005, Tokyo, Japan, pp. 643-654, Apr., 2005. (acceptance rate 12.8%). 25. Mohamed F. Mokbel, Xiaopeng Xiong, Moustafa A. Hammad, and Walid G. Aref. Continuous Query Processing of Spatio-temporal Data Streams in PLACE. In Proceedings of the Second Workshop on Spatio-temporal Databases Management, STDBM 2004, co-located with VLDB 2004, Toronto, Canada, pp. 57-64, Aug., 2004. (acceptance rate 55.5%). 26. Xiaopeng Xiong, Mohamed F. Mokbel, Walid G. Aref, Susanne Hambrusch, and Sunil Prabhakar. Scalable Spatio-temporal Continuous Query Processing for Location-aware Services. In Proceeding of the International Conference on Scientific and Statistical Database Management, SSDBM 2004, Santorini Island, Greece, pp. 317-326, Jul., 2004. (acceptance rate 31%). 27. Mohamed F. Mokbel, Xiaopeng Xiong, and Walid G. Aref. SINA: Scalable Incremental Processing of Continuous Queries in Spatio-temporal Databases. In Proceedings of the 2004 ACM SIGMOD Conference on Management of Data, Paris, France, pp. 623-634, Jun., 2004. (acceptance rate 16%). 28. Mohamed F. Mokbel, Ming Lu, and Walid G. Aref. Hash-merge Join: A Non-blocking Join algorithm for Producing Fast and Early Join Results. In Proceedings of the International Conference of Data Engineering, ICDE 2004, Boston, MA, pp. 251-263, Apr., 2004. (acceptance rate 14.2%). 29. Mohamed F. Mokbel, Walid G. Aref, Khaled El-Bassyouni, and Ibrahim Kamel. Scalable Multimedia Disk Scheduling. In Proceedings of the International Conference of Data Engineering, ICDE 2004, Boston, MA, pp. 498-509, Apr., 2004. (acceptance rate 14.2%). 30. Thanaa M. Ghanem, Rahul Shah, Mohamed F. Mokbel, Walid G. Aref, and Jeffrey S. Vitter, Bulk Operations for Space-Partitioning Trees. In Proceedings of the International Conference of Data Engineering, ICDE 2004, Boston, MA, pp. 29-41, Apr., 2004. (acceptance rate 14.2%). 31. Mohamed F. Mokbel. Continuous Query Processing in Spatio-temporal Databases. In Proceedings of the ICDE/EDBT Ph.D. Workshop 2004, Boston, MA, pp. 119-128, Apr., 2004. Selected among best papers for a revised version in Lecture Notes of Computer Science (LNCS), Current Trends in Database Technology, EDBT 2004 Workshops Revised Selected Papers. Vol. 3268, pp. 100-111. 32. Mohamed F. Mokbel, Walid G. Aref, Susanne Hambrusch, and Sunil Prabhakar. Towards Scalable Location-aware Services: Requirements and Research Issues In Proceeding of the International Symposium on Advances in Geographic Information Systems, ACM GIS 2003, New Orleans, LA, pp.110-117, Nov., 2003. (acceptance rate 26.8%). 33. Mohamed F. Mokbel, Walid G. Aref, and Ibrahim Kamel "Analysis of Multi-dimensional Space-Filling Curves", GeoInformatica, 7(3), pp. 179-209, Sep., 2003. 34. Mohamed F. Mokbel and Walid G. Aref. "On Query Processing and Optimality Using Spectral Locality-Preserving Mappings. In Proceedings of the International Symposium on Spatio-Temporal Databases, SSTD 2003, Santorini Island, Greece, pp. 102-121, Jul., 2003. (acceptance rate 26.6%). 35. Mohamed F. Mokbel, Thanaa M. Ghanem, and Walid G. Aref Spatio-temporal Access Methods, IEEE Data Engineering Bulletin, 26(2), pp. 40-49, Jun., 2003. (Invited paper). 36. Mohamed F. Mokbel, Walid G. Aref, and Ananth Grama. "Spectral LPM: An Optimal Locality-Preserving Mapping using the Spectral (not Fractal) Order. In Proceedings of the International Conference on Data Engineering, ICDE 2003, Bangalore, India, pp. 699-701, Mar., 2003. (short paper, acceptance rate 20.3%). 37. Mohamed F. Mokbel, Walid G. Aref, and Ibrahim Kamel. "Performance of Multi-Dimensional Space-Filling Curves". In Proceedings of the International Symposium on Advances in Geographic Information Sys., ACM GIS 2002, McLean, VA, pp. 149-154, Nov., 2002. (acceptance rate 34.5%). 38. Walid G. Aref, Khaled El-Bassyouni, Ibrahim Kamel, and Mohamed F. Mokbel. "Scalable QoS-Aware Disk Scheduling", In Proceedings of the International Database Engineering and Applications Symposium, IDEAS 2002, Alberta, Canada, pp. 256-265, Jul., 2002. (acceptance rate 29.1%). 39. Diane Moody, Walid G. Aref, Rebecca Doerge, Lauren McIntyre, Mohamed F. Mokbel, Aneta Valova, Christopher Bidwell, "Development Of A Database For The Functional And Expression Annotation Of Sequence Tags (Feast) in The Pig", Plant, Animal & Microbe Genomes, San Diego, CA, Jan., 2002. 40. Mohamed F. Mokbel and Walid G. Aref "Irregularity in Multi-Dimensional Space-Filling Curves with Applications in Multimedia Databases", In Proceedings of the International Conference on Information and Knowledge Management, CIKM 2001, Atlanta, GA, pp. 512-519, Nov., 2001. (acceptance rate 25.4%). 41. Mohamed F. Mokbel, Wafaa A. Elhaweet, and Mohamed N. Elderini "An Efficient Algorithm for Shortest Path Multicast Routing Under Delay and Delay Variation constraints". In the Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS 2000, Vancouver, Canada, Jul., 2000. 42. Mohamed F. Mokbel, Wafaa A. Elhaweet, and Mohamed N. Elderini "A Delay Constrained Shortest Path Algorithm for Multicast Routing in Multimedia Applications", In Proceedings of IEEE Middle East Workshop on Networking, Beirut, Lebanon, Nov. 1999.
Book Chapters: 1. Mohamed F. Mokbel and Walid G. Aref. Indexing Historical Spatio-temporal Data. Encyclopedia of Database Systems, Springer, USA, 2007. 2. Mohamed F. Mokbel and Walid G. Aref. Space-Filling Curves for Query Processing. Encyclopedia of Database Systems, Springer, USA, 2007. 3. Moustafa A. Hammad, Thanaa M. Ghanem, Walid G. Aref, Ahmed K. Elmagarmid, and Mohamed F. Mokbel. Book chapter on "Data Stream Management Systems and Architectures. To appear in "Data Stream Processing Techniques in Sensor Networks", published by Springer. Editors Joao Gama and Mohamed M. Gaber, 2007. 4. Mohamed F. Mokbel and Walid G. Aref. Space-Filling Curves. Encyclopedia of Geographical Information Science, Springer, USA, 2007. 5. Xiaopeng Xiong, Mohamed F. Mokbel, and Walid G. Aref. Continuous Queries in Spatio-temporal Databases. Encyclopedia of Geographical Information Science, Springer, USA, 2007.
Thesis: 1. Mohamed F. Mokbel Scalable Continuous Query Processing in Location-aware Database Servers. Department of Computer Science, Purdue University, August 2005. 2. Mohamed F. Mokbel New Algorithms for Multicast Routing in Real-time Networks. Department of Computer Science, Faculty of Engineering, Alexandria University, Egypt, Nov., 1999.
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