Academics
The Program of Information Technology

Name/ Surname: Hasan DAĞ

Date of Birth  25.05.1964

Title : Professor

Contact Details:
Office: +90 0212-533 65 32 / 1351
E-mail: hasan.dag@khas.edu.tr

Education:

 

Degree

Major

University

Year

B.Sc.

Electrical Engineering

Istanbul Technical University

1987

M.Sc.

Electrical and Computer Eng.

University of Wisconsin-Madison

1990

Ph. D.

Electrical and Computer Eng.

University of Wisconsin-Madison

1995

 

Academic Positions Held
Assistant  Professor                                          Istanbul Technical University                          1996
Associate Professor                                          Istanbul Technical University                          1998
Professor                                                             Istanbul Technical University                          2005

Research Areas:
Computational Science and Engineering  (Iterative Methods, Parallel/Distributed Computing), Iformations Systems (Programming Languages, Database Systems, Web Technologies), Large Scale  Non-linear Systems,  Electrical Power Engineering (Transmission Systems, Stability Analysis), Computational Finance, Data Mining.

A partial list of the theses advised:

  • (Buket Benek) Design of new parallel preconditioners  based on different partitioning techniques and interval arithmetic, june 2006.
  •  (Umut Utkan) An XML based data exchange model for power system studies, july 2003.
  • (Oğuzhan Ceylan) A modified and faster algorithm to determine Nash Equilibrium in a bilateral electricity market, june 2003.
  • (Fatih Yetkin) Model Order Reduction Techniques for VLSI Interconnect Circuits, june 2003.
  • (Y. Cansın Everenosoğlu) The detailed model for power system transient stability, june 2001.
  • (Bülent Oğuz) A comparison of transient stability with TSCS series compansation using EMTDC/PSCAD, may 2000.
  • (Banu Öztürk) Selection of the best bus for voltage stability, may 1999.
  • (Aysu Özyürek ) The effect of FACTS on Turkish Power Transmission System’s Capacity, may 1999.

Publications
Published Internationally Refereed Articles

  1. G. Uludağ, K. Şenel, A. Ş. Etaner-Uyar, H. Dağ, Comparison of Evolutionary Techniques for Value-at-Risc Calculation, M. Giacobini et al. (Eds): EvoWorkshops 2007, LNCS 4448, pp. 218-227.
  2. B. Onat, S. D. Feyiz, H. Dağ, A Parallel Implementation: Real Space Green’s Function Technique, International Journal of High Performance Computing Applications, 21 (1):66-74 SPR 2007.
  3. H. Dağ, An Approximate Inverse Preconditioner and its Implementation for Conjugate Gradient Method, Parallel Computing, 33 (2): 83-91 MAR 2007.
  4. F. Yetkin, W. H. Schilders, H. Dağ,  MOESP Algorithm for Converting One-dimensional Maxwell Equation into a Linear System, Book Chapter D. Ciuprina and D. Ioan (Eds), Mathematics in Industry 11: Scientific Computing in Electrical Engineering SCEE 2006, Springer, 2007, ISBN 978-3-540-71979-3.
  5. 2007. B. Tunç, H. Dağ, AClass: A classification algorithm based on association rule mining, WSEAS Transactıons on Informatıon Science & Applications,  Issue 3, Volume 3, pp. 570-575, March 2006.
  6. G. Uludağ, K. Şenel, A. Ş. Etaner-Uyar, H. Dağ, ML estimation of distribution parameters for VAR calculation using evolutionary algorithms, , WSEAS Transactıons onBusiness And Economics, Issue 3, Volume 2, pp. 109-115, July 2005
  7. H. Dağ, G. Soykan, Ş. Pişkin, O. Yaşar, Computational Science and Engineering Education at Istanbul Technical University, IEEE Computing in Science and Engineering, pp. 20-25, January/February 2005.
  8. H. Dağ, An approximate inverse preconditioner and its implementation for conjugate gradient method, to appear in Parallel Computing, 2007.
  9. F. Alvarado, H. Dağ, Incomplete Inverse Preconditioners, ARI, ITU-Bulletin, Vol. 54, No. 2, 2004.
  10. F. Yetkin, H. Dağ,  A comparison of the model order reduction techniques for linear systems arising from VLSI interconnection simulation, Applied Numerical Analysis and Computational Mathematics, Vol. 1, No. 1, pp. 290-303, 2004.
  11. H. Dağ, G. Soykan, Ş. Pişkin, O. Yaşar, Computational Science and Engineering Education: Faculty and Student Perspectives, Lecture Notes in Computer Science, 3045, Part III, pp. 795-806, Springer Verlag Berlin Heidelberg, 2004.
  12. H. Dağ, Ç. Akdoğan, A parallel implementation of Chebyshev preconditioned conjugate gradient method, ARI,ITU-Bulletin, Vol 53, No. 4, 2003.
  13. H. Dağ, A. Semlyen, A new preconditioned conjugate gradient power flow, IEEE Transactions on Power Systems, Vol.18, No.4, November 2003.
  14. M. Bağrıyanık, H. Dağ, Determination of location of series compensation using fuzzy decision making, European Transcations on Electrical Power (ETEP), Vol. 11, No. 4, pp. 241-245, july/august 2001.
  15.  H. Dağ, F. L. Alvarado, Toward improved uses of the conjugate gradient method for power system applications, IEEE Transactions on Power Systems, Vol.12, No.2, May 1997, pp. 585--591.
  16. H. Dağ, F. L. Alvarado, Computation-free preconditioners for the parallel solution of power system problems, IEEE Transactions on Power Systems, Vol.12, No.3, August 1997, pp. 1306--1314.

Articles in International Conference Proceedings

  1. O. Güren, H. Dağ, A Benchmark Testing at the GRID System of Istanbul Technical University, solid, International Conference on Computational Science and Education, August 7-10, 2006, Rochester, New York, USA.
  2. B. Benek, H. Dağ, Comparison of Decomposition Techniques for Structurally Symmetric Sparse Matrices for Parallel Incomplete LU Factorization International Conference on Computational Science and Education, August 7-10, 2006, Rochester, New York, USA.
  3. B. Tunç, H. Dağ, Generating Classification Association Rules with Modified Apriori Algorithm, 2006 WSEAS International Conference,  Şubat 2006, Madrid, Ispanya.
  4. B. Onat, S. Durukanoğlu, H. Dağ, Parallel implementation of real space Green's Function method for calculations of vibrational density of states for a solid, International Conference on Computational Science and Engineering, 27-30 June 2005, İstanbul, Turkey.
  5. H. Dağ, G. Soykan, B. Benek, Can interval arithmetic based preconditioner work for non-linear systems?, International Conference on Computational Science and Engineering, 27-30 June 2005, İstanbul, Turkey.
  6. H. Dağ, S. Turhan, Special parallel algorithms for using Monte Carlo simulation in VaR estimation, Society of Risk Analysis Anual Meeting, December 7-10,  2003, USA.
  7. O. Ceylan, H. Dağ, A modified and faster algorithm to determine Nash Equilibrium in a bilateral electricity market, The 5th International Power System Conference, November 6-7, 2003, Romania.
  8. H. Dağ, U. Utkan, An XML based data exchange model for power system studies, North American Power Symposium, October 20-21, 2003, Missouri-Rolla, USA.
  9. F. Yetkin, H. Dağ,  A comparison of the model order reduction techniques for linear systems arising from VLSI interconnection simulation, Applied Numerical Analysis and Computational Mathematics Conference, May 23-26 2003,  Cambridge, UK.
  10. Ç. Akdoğan, H. Dağ,  A parallel implementation of Chebyshev preconditioned conjugate gradient method, IEEE Proceedings of International and Distributed Computing, Ekim 2003, SLOVAKYA.
  11. Y. C. Everenosoğlu, H. Dağ, Detailed model for power system transient stability analysis, The 2nd International Conference on Electrical and Electronics Engineering (ELECO’2001), December 2001, Bursa, Turkey.
  12. M. Bağrıyanık, H. Dağ, Determination of location of fACTS devices using Fuzzy Decision Making, International Conference on Power Systems Transients, Budapest June 20-24, 1999.
  13. H. Dağ, B. Öztürk, A. Özyürek, Application of series and shunt compensation to Turkish national power transmission system to improve system loadability, The 2nd International Conference on Electrical and Electronics Engineering (ELECO’99), December 1999, Bursa, Turkey.
  14. M. A. Pai, H. Dağ, Iterative solver techniques in large scale power system computation, presented at the 36th IEEE Conference on Decision and Control, December 10-12, 1997, San Diego, California, USA.
  15. A. Padilha, H. Dağ, F. L. Alvarado, Transient stability analysis on a network of workstations using PVM, The 4th IEEE International Conference on Electronics Circuits and Systems, December 15-18, 1997, Cairo, Egypt.
  16. A. Padilha, H. Dağ, F. L. Alvarado, A parallel virtual machine approach to transient stability analysis, presented at the North American Power Symposium (NAPS), November 10-12, 1996, MIT Cambridge, Massachusetts, USA.
  17. H. Dağ, F. L. Alvarado, Computation-free preconditioners for the solution of power system problems,, presented at the North American Power Symposium (NAPS), October, 1995, Bozeman, MO, USA.
  18.  H. Dağ, F. L. Alvarado, The effect of ordering on the preconditioned conjugate gradient method for power system applications, presented at the North American Power Symposium (NAPS), September 26-27, 1994, Kansas, USA.
  19. H. Dağ,  F. L. Alvarado, H. Singh, Variations on ILU preconditioners applied to electric network least squares problems, in the Proceedings of the fifth SIAM Conference on Linear Algebra, June 15--18, 1994, Snowbird, Utah, USA.
  20. F. L. Alvarado, H. Dağ,  M. ten Bruggencate, Block-bordered diagonalization and parallel iterative solvers, Presented at the Copper Mountain Conference on Iterative Methods, April 5--9, 1994, Breckenridge, Colorado, USA.
  21. H. Dağ, O. Yaşar ve F. L. Alvarado, Parallel partitioned-inverse sparse matrix solutions, Proceedings of the 6th SIAM Conference on Parallel Processing for Scientific Computing, March 22--24, 1993, Norfolk, Virginia, USA.
  22. H. Dağ, F. L. Alvarado, Direct methods versus GMRES and PCG for the power flow problems, Presented at The North American Power Symposium, October 9--11, 1993, Washington, DC, USA.
  23. F. L. Alvarado, H. Dağ, Sparsified and incomplete sparse factored inverse preconditioners, Presented at the Copper Mountain Conference on Iterative Methods, April 8--12, 1992, Copper Mountain, Colorado, USA.
  24. O. Yaşar ve F. L. Alvarado, H. Dağ, Partitioned inverse sparse matrix solutions on the Intel iPSC860 Hypercube, Proceedings of the Intel Supercomputer User Group Conference, October 4--7, 1992, Dallas,Texas, USA.
  25. H. Dağ, F. L. Alvarado, Propagation of perturbations in entries of power system W-matrices, Presented at the North American Power Symposium, October 7--9, 1991, Carbondale, Illinois, USA.

Other Publications
Books:

  • O. Yaşar, H. Dağ (Eds. for Special Issue) Trends in Parallel Computing, Parallel Computing, (33) (2), March 2007.
  • O. Yaşar, H. Dağ (Eds. for Special Issue) Trends in Computational Science, International Journal of High Performance Computing Applications, March 2007.
  • H. Dağ, Y. Deng (editors), ICCSE 2005 : International Conference on Computational Science an Engineering, Istanbul, June 27-30, 2005.

Published National Articles:

  • M. Bağrıyanık, H. Dağ, Determination of location of Series Compensation devices in electric power systems, Yıldız Technical University Journal, june 1999.
  • H. Dağ, Elektromagnetik Transient Program (EMTP) Kaynak ELEKTRİK Journal, March 1997, pg. 123-128.

Articles in National Conference Proceedings

  • F. Yetkin, H. Dağ, Sanaldoku tabanlı elektronik devre benzetim programı tasarımı, Electrical, Electronics and Computer Engineering Symposium, 18-22 December 2002, Bursa, Turkiye.
  • H. Dağ, M. Demiralp, A. Kanmaz,  MuPAD Yardımıyla Çarpımsallaştırılmış Yüksek Boyutlu Model Gösterilim Katsayılarının Belirlenmesi, 12. National Mechanical Congress, 10-14 September 2001, Konya, Turkiye.
  • H. Dağ, O. Ceylan, Yüksek Boyutlu İletim Denkleminin Yaklaştırımında Çarpımsallaştırılmış Yüksek Boyutlu Model Gösterilim, 12. National Mechanical Congress, 10-14 Sepmtember 2001, Konya, Turkiye.
  • H. Dağ, Hızlı-ayrık yük akış metodunun özdeğer analizi, Electrical, Electronics and Computer Engineering 8. National Congress 6-12 September 1999, Gaziantep.
  • M. Bağrıyanık, G. Bağrıyanık, H. Dağ, Kapasitif reaktif güç yerleşiminin sistem kayıpları açisından incelenmesi, Elektrik-Elektronik-Bilgisayar Mühendisliği 8. Ulusal Kongresi 6-12 Eylül 1999, Gaziantep.

Technical Discussions:

  • H. Dağ, Discussion to the paper titled "New ordering methods for sparse matrix inversion via diagonalization", by Y. Q. Wang and H. B. Gooi, IEEE Transaction on Power Systems, Vol. 12, No.3, August 1997, pp. 1304-1305.
  • H. Dağ, F. L. Alvarado, Discussion to the paper titled "Conjugate gradient methods for power system dynamic simulation on parallel computers", by I.C. Decker, D.M. Falcao and E. Kaszkurewicz, IEEE Transactions on Power Systems, Vol. 11, No. 3, August 1996, pp. 1226-1227.
  • H. Dağ, F. L. Alvarado, Discussion to the paper titled "Fundamental concepts of a KRYLOV subspace power flow methodology'', by A. Semlyen, IEEE Transactions on Power Systems, Vol.11, No.3, August, 1996, pp. 1535-1537.

Letter to Editor:

  • H. Dağ, A. Semlyen, Closure for the Discussion by F. D. Leon to the paper titled “A new preconditioned conjugate gradient power flow”, IEEE Transactions on Power Systems, Vol.18, No.4, pp. 1601--1601, November 2003.
  • H. Dağ, F. L. Alvarado, Closure for the Discussion by M. A. Pai to the paper titled "Toward improved uses of the conjugate gradient method for power system applications", IEEE Transactions on Power Systems, Vol.12, No.3, pp. 1313—1314, August 1997.

 Others:

  • V. Silindir, H. Dağ, E. Afacan, M. T. Aydemir, (Book Translation) Shaum Series: Sinyaller ve Sistemler, (Shaum’s Outlines), Nobel Yayın Dağıtım, Ankara 2001.

Projects

  • TÜBİTAK, Computational Science and Engineering, A center of Excellence of Industrial Innovation, project executive, December 2005-December 2007.
  • ITU-SPO (The State Planning Organization) Mutual executive in "Project of National High-Performance Computation Centre, 2004-2008 (Yaklaşık 20 milyon USD bütçeli bir proje olup Avrupa Yatırım Bankası tarafındanda desteklenmektedir).
  • ITU-DPT Ileri Teknolojier Eğitim ve Araştırma Pojesi kapsamında “Hesaplamalı Bilim ve Mühendislik Programı” alt projesi yürütücüsü, 2001-2006. (Projenin tamamı 25 milyon USD olup, anılan alt program bütçesi yaklaşık olarak 4,25 milyon USD dır).
  • ITU-Genç Araştırmacıları Destekleme Projesi, Türkiye elektrik enerji iletim sisteminde dinamik kararlılık analizi, Ekim 1999-Nisan 2001.
  • ÇEAŞ'ın 2000-2020 yılları için Enerji iletim hatlarının büyüme analizlerinde araştırıcı (Dinamik kararlık Analizleri bölümünde sorumlu)
  • TOFAŞ-İstanbul , Energy System Rehabilitation of Automotive Buildings (1998).
  • Two different projects in İ.T.Ü. Scientific Researches Department supporting MSc students thesis, 2002-2003

Administrative Duties:

  • Head of Department           Kadir Has University, Istanbul, Turkey,         Department of Information Technologies      (2008-    )
  • Deputy. Head of Enstitute                İstanbul Technical University         Informatics Institute (1999-2006)
  • Acting Director   İstanbul Technical University          Informatics Institute (2002-2003)

Memberships in Professional Organizations: 
IEEE, EMO

Awards:

  • (The best conference paper), North American Power Symposium (NAPS), Manhattan, KS, USA, 26-27 September, 1994.
  • (honorable mention), The 5th  SIAM Conference on Linear Algebra Snowbird, Utah, 14-18 June 1994.

Teaching Experience:

Undergradute Courses:

  • Discrete Computational Structures
  • Database Systems (Işık Üniversitesi)
  • Introduction to Computers and Information Systems
  • Introduction to Scientific and Engineering Computing
  • Introduction to Programming (Işık Üniversitesi)
  • Computing Skills Workshop (Işık Üniversitesi)
  • Power Transmission Systems
  • Faulted Power System Operation
  • Numerical Methods
  • Linear Algebra

Graduate Courses:

  • Advanced Data Warehousing and Data Mining
  • Large Scale Sparse Matrix Computation and its Engineering Applications
  • Parallel and Distributed Computing
  • Scientific Programming (I and II)
  • Server Side Programming Languages
  • Web Based  Database Management Systems             
  • New Extensions on Web Programming
.