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Publications

Journal Articles:

  1. C. F. Delale, G. Tryggvason and S. Nas  “Cylindrical bubble dynamics: Exact and direct numerical simulation results,” Physics of Fluid, vol. 20, Issue 4, pp. 040903-1:040903-10, April 2008. 

  2. S. Nas, M. Muradoglu and G. Tryggvason, “Pattern Formation of Drops in Thermocapillary Migration”. International Journal of Heat and Mass Transfer 49 (13-14), pp. 2265-2276, Feb 2006.

  3. Tuzcu, V., Nas, S., Borklu, T. and Ugur, A. “Decrease in R-R Interval Entropy Prior to the Onset of Atrial Fibrillation,”  Europace (2006), 8, pp. 398-402.

  4. C. F. Delale, S. Nas and G. Tryggvason, “Direct Numerical Simulation of Shock Propagation in Bubbly Liquids,” Physics of Fluid, 17, Dec 2005. 

  5. Sanbe A, James J, Tuzcu V, Nas S, Martin L, Gulick J, Osinska H, Sakthivel S, Klevitsky R, Ginsburg KS, Bers DM, Zinman B, Lakatta EG, Robbins J. “A Transgenic Rabbit Model for Human Troponin I-based Hypertrophic Cardiomyopathy”. Circulation 111(18):2330-2338, May 10, 2005.

  6. S. Nas and G. Tryggvason, “Thermocapillary Interaction of Two Bubbles or Drops,” International Journal of Multiphase Flow 29 (7): 1117-1135, July 2003.

  7. G. Tryggvason, B. Bunner, A. Esmaeeli, D. Juric, N. Al-Rawahi, W. Tauber, J. Han, S. Nas, and Y.-J. Jan, “A Front Tracking Method for the Computations of Multiphase Flow,” Journal of Computational Physics 169 (2): 708-759, May 20 2001.

Book Chapter:

G. Tryggvason, D. Juric, J. Che, M.R.H. Nobari, and S. Nas, “Computations of Multiphase Flows by a Finite Difference/Front Tracking Method. III Variable Surface Tension and Phase Change”.  In: 29th Computational Fluid Dynamics. Lecture Series 1998-03. Von Karman Institute for Fluid Dynamics.

Conference Papers:

1.      Volkan Tuzcu, Selman Nas, Hakan Erdogan, Li Zhang, Michael Vincent, D. Woodward Benson, “Identification of Genotype-Specific Repolarization Patterns in Congenital Long-QT Syndrome Using Dynamic Time Warping Analysis”. American Heart Association Scientific Session, November 13-16, 2005, Dallas, Texas. Circulation 112 (17): U457-U457 1942 Suppl. 2 OCT 25 2005.

2.      Nurullah Arslan, Volkan Tuzcu, Selman Nas, Ayþe Durukan, “CFD Modelling of Blood Flow Inside Human Left Coronary Artery Bifurcation with Aneurysms”. 3rd European Medical and Biological Engineering Conference, Nov 20-25, 2005, Prague (Czech Republic).

3.      Volkan Tuzcu and Selman Nas, “Sample Entropy Analysis of Heart Rhythm Following Cardiac Transplantation”. IEEE International Conference on Systems, Man, and Cybernetics, Oct 10-12, 2005, Hawaii, USA.

4.      Volkan Tuzcu and Selman Nas, “Dynamic Time Warping As a Novel Tool in Pattern Recognition of ECG Changes in Heart Rhythm Disturbances”. IEEE International Conference on Systems, Man, and Cybernetics, Oct 10-12, 2005, Hawaii, USA.

5.      Tuzcu, V., Nas, S., Borklu, T., Ugur, A. “Decrease in R-R Interval Entropy Prior to the Onset of Atrial Fibrillation,” Journal of American College of Cardiology 45(3):333A-333A Suppl. A, Feb 1st 2005.  

6.      C. F. Delale, S. Nas and G. Tryggvason, “Numerical Simulation of Shock Propagation in Bubbly Liquids by the Front Tracking Method,” Proceeding of Fluid Mechanics and its Applications of IUTAM Conference, Oct 4-7 2004, Chicago. Table of Contents of Proceeding.

7.      M. Muradoglu, M.B. Soydan and S. Nas, “Computational Modeling of Bio-Fluid Mechanics of White Blood Cells,” IUTAM Symposium on Recent Advances in Disperse Multiphase Flow Simulation, Argonne National Laboratory, Argonne, IL, USA, (2004) (To be published by Kluwer Academic Publisher).

8.      Vatandas, E., Ozkol I., and Nas, S., “Implementation of Genetic Algorithm on The Design of a Transonic Wing by Using Parallel Processing,” ICSP, International Conference on Signal Processing, December 15-17, 2004, Istanbul, Turkey.

9.      F. Çenesiz, H. Saka, S. Nas, C. Özþamlý, “A Method to Guarantee the Continuity of GPS in Urban Envirýnments,” International Symposium on Remote Sensing and Integrated Technologies, 20-22 October 1999, Istanbul, Turkey.

10.  S. Nas, T. Kotil, G. Yücesan, K. Yýllýkçý and Z. Mecitoðlu, “Structural Analysis of RTE-2000 Tramcar,” Second International Advanced Technologies Symposium, Marmara University, March 1999, Istanbul, Turkey.

11.  H. Saka, S. Nas and G. Yücesan, “Development of an AVL system by using GPS,” II. International Transportation Conference, Editors: Ý. Gök and R. Yetim, pp: 169-172, 1-4 October 1998, Istanbul.

12.  S. Nas and Ö. Yýldýz,“Istanbul Traffic Signalization Project,” Traffic and Signalization Conference, Atatürk Kültür Merkezi, Istanbul, 22-23 March 1997, Istanbul, Turkey.

13.  G. Tryggvason, D. Juric, S. Nas and S. Mortazavi, “Computations of Drop Collision and Coalescence,” 3rd Microgravity Fluid Physics Conference, Cleveland OH, June 13-15, 1996. NASA Conference Publication 3338, pp. 535-540, 1996.

14.  O. Borat, S. Nas and A. Güllüoðlu, “Fire Gases and Toxic Hazard Assessment,” The First International Conference on Fire and Safety, pp. 60-67, 20-21 May 1996, Istanbul, Turkey.

15.  M. Kantarcý, O. Borat, A. Güllüoðlu and S. Nas, “Major Factors Influencing Fire Growth,” The First International Conference on Fire and Safety, pp. 50-59, 20-21 May 1996, Istanbul, Turkey.

16.  G. Tryggvason, A. Esmaeeli, D. Juric, S. Mortazavi and S. Nas “A front tracking method for direct simulations of multi-phase flows,”  Boundary Elements XVII, edited by C.A. Brebbia, S. Kim, T. A. Osswald and H. Power, Comp. Mech. Pub., Southampton, pp. 653-660 (1995). Invited mini-symposium presentation. 17th Conference on Boundary Elements, BEM-17, Madison, WI, July 17-19, 1995.

17.  G. Tryggvason, D. Juric, S. Nas and M.H.R. Nobari, “Computations of Drop Collision and Coalescence,” Second Microgravity Fluid Dynamic Conference, NASA Conference Publication 3276, Cleveland, Ohio, June 21-23, 1994, 135-140.

18.  S. Nas and G. Tryggvason, “Computational Investigation of the Thermal Migration of Bubbles and Drops,” AMD 174/FED 175 Fluid Mechanics Phenomena in Microgravity, Ed. Siginer, Thompson, and Trefethen. ASME Winter Annual Meeting, 1993, pp: 71-83.                    

19.  G. Tryggvason and S. Nas, “Computational Investigation of the Thermal Migration of Bubbles and Drops”. Bulletine of the American Physical Society, Vol. 38, No. 12, November 1993. APS 46th Annual Meeting, Division of Fluid Dynamics, Albuquerque, New Mexico.

20.  S. Nas and G. Tryggvason, “Computational Investigation of the Thermal Migration of Bubbles and Drops”. Bulletin of the American Physical Society, Vol. 37, No. 8, 1992. APS 45th Annual Meeting, Division of Fluid Dynamics, Tallahassee, Florida.

21.  R. Kaykayoglu, S. Nas and A. Altinisik, “Computational simulation of vortex-elliptic leading edge interaction by point vortex method,” Fifth National Mechanics Conference, Bursa, Uludag, September 1987, Turkey.

Abstracts:

Tuzcu, V., Nas, S., Borklu, T., Ugur, A. “Decrease in R-R Interval Entropy Prior to the Onset of Atrial Fibrillation,” Journal of American College of Cardiology 45(3):333A-333A Suppl. A, Feb 1st 2005.

Poster Presentations:

Tuzcu, V., Nas, S., Borklu, T., Ugur, A. “Decrease in R-R Interval Entropy Prior to the Onset of Atrial Fibrillation,” American College of Cardiology, Annual Scientific Session 2005, May 6-9, Orlando, Florida, USA.

H. Saka, S. Nas, F. Çenesiz, G. Yücesan, “Accurate Position Calculation of A Moving Vehicle by Inverse Differential GPS,” International Symposium on Remote Sensing and Integrated Technologies, 20-22 October 1999, Istanbul, Turkey.

Seminars:

“Applications of Nonlinear Methods in Physiology and Medicine,” Department of Aerospace Engineering, Istanbul Technical University,  November 1st, 2006. Istanbul, Turkey.

“Nonlinear Dynamics Applications in Cardiology,” Distinguished Speaker in Joint College Colloquium Series, University of Arkansas at Little Rock, September 23rd, 2005. Little Rock, AR, USA.

“Selected Research Topics in Cardiology,” Arkansas Children Hospital, University of Arkansas for Medical Sciences, December 6, 2004. Little Rock, AR, USA. 

“Analysis of ECG signals by nonlinear methods,” Istanbul Technical University, Feb 10th, 2004, Istanbul, Turkey.

“Parallel Computation of Thermocapillary Bubble and Drop Migration in Zero Gravity,” Parallel CFD Workshop, Experiences in Implementation, June 16-18 1999, Istanbul, Turkey.

“Internet and its area of usage,” Istanbul Technical University, November 1995.

“Thermocapillary Migration of Bubbles and Drops in Zero Gravity,” Istanbul Technical University, 22 May 1995.

“Thermocapillary Migration of Bubbles and Drops in Zero Gravity,” The University of Michigan, November 15, 1992.

Technical Reports:

Zahit Mecitoðlu, Güven Yücesan, Temel Kotil and Selman Nas, “Development of a Computerized Measurement System for the Simulation of Structural Behavior of RTE-2000 Tramcar,” Technical Report, Istanbul Technical University, Department of Aerospace Engineering, 1999.

Temel Kotil, Zahit Mecitoðlu, Güven Yücesan and Selman Nas, “A Mechanical Measurement System for the RTE-2000 Tramcar,” Technical Report, Istanbul Technical University, Department of Aerospace Engineering, April 1999.

Temel Kotil, Zahit Mecitoðlu, Güven Yücesan and Selman Nas, “Identification of Dynamic Characteristics of the RTE-2000 Tramcar by ANSYS software,” Technical Report, Istanbul Technical University, Department of Aerospace Engineering, April 2000.

PhD Thesis:

Nas, S., 1995, “Computational Investigation of Thermocapillary Migration of Bubbles and Drops in Zero Gravity,” Ph.D. thesis, Department of Aerospace Engineering, University of Michigan, Ann Arbor, MI, 48109 USA. Introduction,   Ch1,   Ch2,   Ch3,   Ch4_1,   Ch4_2,   Ch5,   Appendix,   Abstract