Ahmet Cosar(Professor)

Office: A-208, Tel: 210 5566 e-mail: cosar@metu.edu.tr
Department of Computer Engineering
Middle East Technical University
PhD, Computer Science, University of Minnesota(1996)
BS, Comp.Eng. , METU(1986).

Courses

CENG 140 - Syllabus
C class examples
C Language Tutorial
C Operator Precedence Table

CENG 769 - Syllabus

SE 541 - Syllabus

Research

  • Distributed database design and query optimization
  • Optimization with Evolutionary and Genetic Algorithms
  • Computer Networks & Distributed Computing
  • Relational Query Optimization
  • Intelligent Data Analysis Group ( IDAG)

  • Publications

  • Dokeroglu T, Cosar A (2016) A Novel Multistart Hyper-heuristic Algorithm on the Grid for the Quadratic Assignment Problem. Journal of Engineering Applications of Artificial Intelligence, v.52, June 2016, pp.10-25. (PDF)
  • Dokeroglu T, Bayir MA, Cosar A (2015) Robust heuristic algorithms for exploiting the common tasks of relational cloud database queries, Applied Soft Computing, v.30,May 2015, pp.72-82. (PDF)
  • Dokeroglu T., Ozal S., Bayir M.A., Cinar M.S., Cosar A.,(2014) Improving the performance of Hadoop Hive by sharing scan and computation tasks, Journal of Cloud Computing: Advances, Systems and Applications , 3:12, June 2014, Springer.. (PDF)
  • Dokeroglu,T., Cosar,A. (2014) "Optimization of one-dimensional bin packing problem with island parallel grouping genetic algorithms", J. of Computers &Industrial Engineering. ,v75
  • Dokeroglu, T., Cosar, A. (2014), "Integer Linear Programming Solution Model for the Multiple Query Optimization Problem" ISCIS October 27-28th, 2014, Krakow, Poland
  • Dokeroglu,T.,Sert, A.,Cinar, S."Evolutionary Multiobjective Query Workload Optimization of Cloud Data Warehouses," The Scientific World Journal, vol. 2014, 2014. Open Access
  • Dokeroglu, T., Sert, S.A., Cinar, M.S., and Cosar, A. (2014). Designing Cloud Data Warehouses using Multiobjective Evolutionary Algorithms, International Conference on Agents and Artificial Intelligence (ICAART) Eseo, Angers, Loire Valley, France.
  • Tansel Dokeroglu, Umut Tosun, and Ahmet Cosar, 2013, Evaluating the Performance of Recombination Operators with Island Parallel Genetic Algorithms, IFAC MIM 2013, Saint Petersburg, Russia. MIM 2013 IFAC MIM 2013, Saint Petersburg, Russia. MIM 2013
  • U. Tosun, T. Dokeroglu, A. Cosar, "A Robust Island Parallel Genetic Algorithm for the Quadratic Assignment Problem," Int. J. of Production Research (Available online first-PDF)

    Current students:

    1. Ismail Turk (PhD)
    2. Yusuf Tambag (PhD)
    3. Sait Emre Pektas ( PhD)
    4. Khitem Amiri (GGIT, PhD)

    Graduated students:

    1. Yagmur Aksan (MS, 2016)
    2. Firdevsi Akca (MS, 2016)
    3. Muhammed Beyaz (MS, 2015)
    4. Seyit Alper Sert (MS, 2014)
    5. Tansel Dokeroglu (PhD, 2014) Multiobjective Relational Data Warehouse Design for the Cloud
    6. Umut Tosun (PhD, 2013) Distributed Database Design with Linear Programming and Heuristic Algorithms
    7. Serkan Ozal (MS, 2013), Improving the Performance of Hadoop/HIVE by Sharing Scan and Computation Tasks
    8. Hunain Durrani (MS, 2013), PARALLELIZATION OF K-MEANS AND DBSCAN CLUSTERING ALGORITHMS ON A HPC CLUSTER
    9. Mucahit Karakoc (MS, 2010), Comparison of domain-independent and domain-specific location predictors with campus-wide WI-FI mobility data
    10. Maciej Kuszewski (MS, 2010), Performance analysis and comparison of SOA servers in different applications
    11. Bulent Ozturk (MS, 2010), A web based GIS mashup for archaeology
    12. Seckin Onder(Ms,2010), Execution of Distributed Database Queries on a HPC System
    13. Ali Demir(Ms,2010), Real-Time 2D/3D Display of DTED Maps and Evaluation of Interpolation Algorithms
    14. Ali Anil Silaci (Ms, 2009) A conformance and interoperability test suite for Turkey's NHIS and an interactive test control and monitoring environment
    15. Ender Sevinc(PhD,2009), Query Optimization in Distributed Databases
    16. Dilixati Abudula(Ms,2006), A Performance Comparison of Multiple Query Optimization Heuristics
    17. Tayfun Yagci(Ms,2005), ACOUSTIC SIGNATURE GENERATION FROM SONAR DATA
    18. Hacer Yalim (M.S., June 2005), Acceleration of direct volume rendering with texture slabs on programmable graphics hardware
    19. Onur Aymak (M.S., August 2004), AD HOC PACKET ROUTING SIMULATION AND TACTICAL PICTURE DISPLAY TOOL FOR NAVY
    20. Zulfu Orenc (M.S., June 2004), A Study of Kangaroo Transaction Model for Mobile Transaction Management
    21. Huseyin Sayin (M.S., November 2003), A Proposal for Tactical Messaging and Usage of Extensible Markup Language Message Text Formats in the Tactical Command Control and Information Systems
    22. Omer Necip Hamali (M.S. 2003) Storing and querying user context information using ontologies and trusted authorities
    23. Yusuf Tambag (M.S., February 2003), Design and implementation of an ebXML compliant B2B interoperability platform
    24. Ender Sevinc (M.S., April 2000), Dynamic Modification of XML Documents
    25. Atakan Erdem (M.S., January 1999), Rapid Application Development Classes for Database Applications
    26. Okan Gocmenoglu (M.S., January 1999),Component Based Application Development
    27. Olcay Sarioglu (M.S., January 1999), Benchmarking of a Student Information Database
    28. Majed Abusafiya (M.S., 1997), Estimation of selection and join selectivities using regression analysis

    Top 10 Algorithms of 20th Century

    (Metropolis, Simplex LU Decomposition, Fortran, QR Decomposition, Quicksort, FFT, Integer relation detection, Fast multipole)