HappawanaGemunu Happawana
Department Chair
Ph.D.

Email: ghappawana@csufresno.edu

Office: Engineering East 154B                                                

Phone: (559) 278-6832                             

Mailing Address: 2320 E. San Ramon Ave., MS/EE 94, Fresno, CA 93740-8030   

Spring 2017 Office Hours: Wednesday: 10AM-12PM

Academic Experience:

  • 01/12-Present Professor and Chair, Department of Mechanical Engineering, California State University, Fresno, CA
  • 01/08-08/12 Associate Professor Department of Mechanical Engineering, California State University, Fresno, CA
  • 03/01-12/07 Assistant Professor Department of Mechanical Engineering, Southern Methodist University, Dallas, TX.
  • 09/98-03/01 Senior Lecturer Department of Mechanical Engineering, Southern Methodist University, Dallas, TX
  • 09/94-08/98 Visiting Assistant Professor /Lecturer Department of Mechanical Engineering, Southern Methodist University, Dallas, TX
  • 08/97-08/98 Adjunct Faculty Brookhaven College, Dallas, TX
  • 01/89-08/94 Research Assistant School of Mechanical Engineering, Purdue University, IN.
  • 05/88-12/88 Research Assistant School of Mechanical Engineering, Purdue University, Indianapolis, IN.
  • 01/86-05/88 Teaching Assistant (with full instructional responsibility) Department of Mathematics, Purdue University, Indianapolis, IN.

Education:

  • Ph.D., Mechanical Engineering, Purdue University, West Lafayette, IN. 1994
  • M.S., Applied Mathematics, Purdue University, Indianapolis, IN. 1988 
  • B.Sc., Mathematics University of Colombo, Sri Lanka 1984 
  • CEng., Mechanical Engineering (Level 1), Council of Engineering (CEI) London, England 1983 

Industry Experience:

  • 8/00- Present Consultant Photodigm, Inc, 1155 E. Collins Blvd, Richardson, TX  Principal Investigator on high power and high speed 1550 nm wavelength photodiode.
  • 09/97-08/99 Chief Technology Officer Tecstar- the battery specialists, Suite 106, Carrolton, TX 
  • 03/89-11/93 Automotive Consultant and Technologist Import Auto Pro, 1902 Lafayette Rd, Indianapolis, IN

Patents:

  • 2012 Quantum cascade lasers with transparent conductive layers for simplified processing and high efficiency: N. Amarasinghe and G. Happawana. (File No. 61597434), provisional.
  • 2005 Apparatus and Method for Cooling Lasers Using Deionized Water, Inventors: G. Happawana, A. Rosen, W. Janton and G. Evans.  (File No. 021791.0120).
  • 2004 Catheter having semiconductor lasers with light scattering elements, Inventors: G. Happawana, I. Charamisinau, G. Evans, A. Rosen and A. Hsi.  (File No. 021791.0113). 

Publications:

Books:
Recent Advances in Robust Control – Novel Approaches and Design Methods: Quantitative Feedback Theory (QFT) & Sliding Mode Control, InTech, ISBN: 978-953-307-195-4,  2011               

Driveline Systems of Ground Vehicles: Theory and Design by Alexandr F Andreev, Viachaslau Kabanau and Vladimir Vantsevich, CRC Press, ISBN: 978-1-4398-1727-8 (chapter sections written 2.1, 6.5, and 7.6.1), 2010

Machines and Society: (with Dona Mularkey), Pearson Custom Publishing, ISBN: 0-536-85845-4 (book), 2005

Journal Papers
Gemunu S. Happawana and Amaranath Premasiri 2014. International Journal of Biomedical Engineering and Technology. Tumor modeling and microwave heating for increasing oxygen in tumors during photodynamic therapy (submitted).

Gemunu S. Happawana and Amaranath Premasiri 2012. International Journal of Biomedical Engineering and Technology. Photodynamic therapy oxygen monitoring system for use in esophageal carcinoma, Vol.9, No. 3, pp 287-292.

Gemunu S. Happawana, A. Premasiri, and A. Rosen 2012. International Journal of Biomedical Engineering and Technology. Simplified light transport model for irradiation dose calculation of photodynamic therapy, Vol. 9 No. 1, pp 25-44.

Gemunu S. Happawana and Amaranath Premasiri 2011. International Journal of Biomedical Engineering and Technology. Molecular oxygen diffusion in a capillary microenvironment during photodynamic therapy, Vol. 7, No.1, pp 28-45.

Gemunu. S. Happawana, A. Premasiri, and A. Rosen 2009.  ASME Journal of Electronic Packaging. Direct de-Ionized water-cooled semiconductor laser package for photodynamic therapy of esophageal carcinoma: Design and analysis.  Vol. 131, June issue 2, pp 35-52.

N. Rajapakse, G. S. Happawana, and Y. Hurmuzlu 2007.  Journal of Systems and Control Engineering, Part I. Vol. 221, No.5, pp 769-779 (11).  Suppression of heavy truck driver seat vibration using sliding mode control & quantitative feedback theory.

N. Rajapakse, G. S. Happawana, and Y. Hurmuzlu 2007.  Journal of Systems and Control.  Vol. 221, No. 4, pp 673-685(13). Suppression of base vibrations and tracking of the tip of an inverted pendulum using sliding mode control & quantitative feedback theory.

N. Rajapakse, and G. S. Happawana 2006.  International Journal of Vehicle noise and Vibration. Vol. 2, No. 3, pp 227-248. Nonlinear analysis of an all - wheel drive vehicle seat due to driveline vibration for driver comfort.

I. Charamisinau, G. Happawana, G. Evans, J. Kirk, D. P. Bour, A. Rosen, and A. R. Hsi 2005.  Special Issue of the IEEE Journal of Selected Topics in Quantum Electronics on Biophotonics. Vol. 11, No. 4, July/August, pp 881-891. High power semiconductor red laser arrays for use in photodynamic therapy.

I. Charamisinau, G. Happawana, G. Evans, A. Rosenand R. A. Hsi 2005.  Applied Optics. Vol. 44, pp. 5055-5068. Semiconductor laser insert with uniform illumination for use in photodynamic therapy.

G. S. Happawana 2003.  InternationalJournal of Vehicle Autonomous Systems.  Vol. 1, Nos. ¾, pp 280-290. A method for converting nonautonomous systems with periodic coefficients to autonomous systems.

N. Rajapakse and G. S. Happawana 2003.  InternationalJournal of Vehicle Autonomous Systems. Vol. 1, Nos. ¾, pp 324-338.  A nonlinear autonomous roll model for heavy trucks’ directional stability.

E. Taha, G. S. Happawana and Y. Hurmuzlu 2003.  Journal of Dynamic Systems, Measurement, and Control. Vol. 125, pp 1-4. Quantitative feedback theory (QFT) for chattering reduction and improved tracking in sliding mode control.

O. D. I. Nwokah, G. S. Happawana and Eloi Taha 2001. Journal of Dynamics and Control.  Vol.11, pp71-81. Quantitative feedback theory revisited.

V. V. Vantsevich, G. S. Happawana, M.S. Vysotski, L. K. Gileles, M. Zakharik and O. D. I. Nwokah 2001.  International Journal of Vehicle Design.  Vol.25, pp 170-181, Nos ¾. Optimization of mass and geometric vehicle parameters for multiple drive wheel trucks.

V. V. Vantsevich, G. S. Happawana, M.S. Vysotski, M. Zakharik and O. D. I. Nwokah 2001.  International Journal of Vehicle Design. Vol.25, pp165-169, Nos ¾.  Vehicle dynamics as the second dynamics problem.

O. D. I. Nwokah, G. S. Happawana and D. Afolabi 1999.  Journal of  Dynamic Systems, Measurement, and Control.  Vol.121, pp. 583-593.  The design of quality engineered control systems.

O. D. I. Nwokah, G. S. Happawana, E. Borzova and D. Afolabi 1999.  Journal of  Dynamic Systems, Measurement, and Control. Vol.121, pp. 577-582.  Catastrophes in optimal control.

G. S. Happawana, A. K. Bajaj and O. D. I. Nwokah 1998.  Journal of  Sound and Vibration. Vol. 211(5), pp.761-789.  Free and forced response of mistuned linear cyclic systems: A singular perturbation approach.

G. S. Happawana, A. K. Bajaj and M. Azene 1995. Journal of Sound and vibration. Vol. 183(2), pp. 361-367.  The analytical solution to nonsimilar normal modes in a strongly nonlinear discrete system.

G. S. Happawana, A. K. Bajaj and O. D. I. Nwokah 1993. Journal of Sound and Vibration. Vol. 160 (2), pp. 225-242. A singular perturbation analysis for eigenvalue veering and modal sensitivity in perturbed linear periodic systems.

G. S. Happawana, A. K. Bajaj and O. D. I. Nwokah 1991.  Journal of Sound and Vibration. Vol. 147, pp. 361-365.  A singular perturbation perspective on mode localization.

Conference Proceedings
J. Rivera, G. Happawana, P. Reilly, and W. Mizuno 2010. Proceedings of American Society of Engineering Education, Pacific Southwestern Conference, March 25-28, Reno Nevada. Three stage vibration isolation for unmanned aerial vehicle gimbal targeting system.

G. Happawana and A. Gopi 2010. Proceedings of American Society of Engineering Education, Pacific Southwestern Conference, March 25-28, Reno Nevada. Six by six terrain vehicle for optimal mass, geometric configuration and tractive efficiency.

G.S. Happawana, A. Premasiri, and A. Rosen 2009. Proceedings of American Society Engineering Education, Pacific Southwestern Conference, March 20-21, San Diego, California.  Design, fabrication, and analysis of photodynamic therapy oxygen monitoring system for use in esophageal carcinoma.

G.S. Happawana, A. Premasiri, and A. Rosen 2009. Proceedings of American Society Engineering Education, Pacific Southwestern Conference, March 20-21, San Diego, California.  Design, fabrication, and analysis of photodynamic therapy oxygen monitoring system for use in esophageal carcinoma.

N. Shyrokau, G. S. Happawana, V. V. Vantsevich 2008. Proceedings of IMECE08 ASME International Mechanical Engineering Congress and Exposition, October 31 – November 6, Boston, Massachusetts, USA.  Generalized model and computational algorithm for modeling passive driveline systems of awd automobiles.

A. Premasiri, G. S. Happawana, and A. Rosen 2008.  ASME international mechanical engineering congress and exposition, Paper No. IMECE2008-66480,Oct. 31 – Nov. 6, Boston, Massachusetts, USA. Porous media tumor model for light penetration and oxygen diffusion during photodynamic therapy.

A. Premasiri, G. Happawana, and A. Rosen 2007. Frontiers in Biomedical Devices Conference, June 7-8, Irvine, California.  Analytical porous media light penetration model in PDT.

A. Premasiri, G. Happawana, and A. Rosen 2007.  SPIE Symposium on Biomedical Optics (BiOS).  Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy XVI, January 20-25, San Jose, CA. Development of high-yielding photonic light delivery system for photodynamic therapy of esophageal carcinomas.

N. Rajapakse, G. S. Happawana and Y. Hurmuzlu 2006.  9th International Symposium on Heavy Vehicle Weights and Dimensions (9ISHVWD), The Pennsylvania State University, June 18-22, PA-16802.  Suppression of heavy truck driver seat vibration using sliding mode control & quantitative feedback theory.

N. Rajapakse and G. S. Happawana 2006.  9th International Symposium on Heavy Vehicle Weights and Dimensions (9ISHVWD), The Pennsylvania State University, June 18-22, PA-16802.  Nonlinear vibration analysis of a heavy truck driver seat for driver fatigue reduction.

G. Happawana, A. Premasiri, V. Amarasinghe, G. Evans, A. Rosen, and S.Wilson 2006.  JSPS Symposium, February 2-3, Denton, Texas.  Bio-photonic        research at SMU: Red laser light delivery system for use in photodynamic therapy treating esophageal cancer and Blue LED blanket  for treating neo natal jaundice.

A. Premasiri, G. Happawana, G. Evans, and A. Rosen 2006.  Particles 2006, May 13-16, Orlando, Florida. Use of a scattering element and direct deionized water cooling in high power semiconductor diode lasers to enhance the beam divergence and performance for use in photodynamic therapy (PDT). Invited Paper.

A. Premasiri, G. Happawana, and A. Rosen 2006.  Frontiers in Biomedical Devices Conference, June 8-9, Irvine, California. Design of a high yielding photonic light delivery system to be used in photodynamic therapy for esophageal cancer, with microwave antenna imprinted balloon catheter for oxygen enhancement.

A. Premasiri and  G. Happawana 2006.  Nuroengineering Conference, UTD Johnson School, June 26-28, Dallas, Texas. Development of high yielding therapeutic system for photodynamic therapy of esophageal carcinomas.

A. Premasiri, G. Happawana, and A. Rosen 2006.  International Conference on Bioengineering and Nanotechnology, University of California, Santa Barbara, September 5-7, CA.  Porous media modeling of tumor oxygenation by microwave heating and design of microwave antenna imprinted balloon catheter for oxygen enhancement in photodynamic therapy for esophageal carcinoma.

N. Rajapakse, G. Happawana and Y. Hurmuzlu 2005. IMECE2005-79753, ASME International Mechanical Engineering Congress and RD&D, November 5-11, Orlando, Florida.  Suppression of base vibrations and tracking of the tip of an inverted pendulum using sliding mode control & quantitative feedback theory.

 N. Rajapakse and G. Happawana 2004. IMECE2004-61851, ASME International Mechanical Engineering Congress and RD&D, November 13-19, Anaheim, California.  A nonlinear six-degree-of-freedom axle and body combination roll model for heavy trucks’ directional stability.

A. Rosen, H. Rosen, A. Hsi, D. Rosen and G. Happawana 2004. MIKON Microwave Photonics Conference, September 7-11, Poland.  Microwaves and photonics in medical diagnostics and therapy. Invited Paper.

N. Rajapakse and G. Happawana 2003. International Conference on  Mechanics of Machine Theory and Design, February 10-13, Minsk, Belarus. A suspension model and nonlinear stability analysis of a dual axle for heavy vehicles, National Academy of Sciences.

I. Charamisinau, G. Happawana, G. Evans, A. Rosen and R. A. Hsi 2003. Photonics East, International Symposium on Biomedical Technology and Applications, Providence, October 27-31, RI, USA. Portable optical actuator for photodynamic therapy.

I. Charamisinau, G. Happawana, G. Evans, A. Rosen and R. A. Hsi 2003. International Congress on Applications of Lasers & Electro-Optics ICALEO – Laser Microfabrication Conference, October 13-16, Jacksonville, FL.  High power semiconductor red laser arrays for biomedical applications.

I. Charamisinau, G. Happawana, G. Evans, A. Rosen and R. A. Hsi 2003. International Congress on Applications of Lasers & Electro-Optics ICALEO Laser Microfabrication Conference, October 13-16, Jacksonville, FL.  Red laser insert with uniform illumination for use in photodynamic therapy.

Charamisinau, G. Happawana, G. Evans, A. Rosen and R. A. Hsi 2003. Photonics Devices & Systems Packaging Symposium PhoPack-2003, August11- 12, San Francisco, CA.  Design of a uniform scattering element for biomedical applications.

A. Rosen, H. Rosen, A. Hsi, D. Rosen, G. Happawana and G. Evans 2003. Microwave Photonics Conference, September 10-13, Budapest Hungary. Opportunities for microwaves and photonics in medical diagnostics and therapy. Invited Paper.

I. Charamisinau, G. Happawana, G. Evans, A. Rosen, R. A. Hsiand D. Horton 2002.Laser Applications Technology (LAT) Conference,June 26-28, Moscow, Russia.   Red laser light delivery system for use in photodynamic therapy.

G. Happawana, B. Dinkespiler, T. Masood and C. Davis 2002. SPIE’s Conference of Photonics West. Grating Outcoupled Surface emitting Semiconducter Lasers at 1310 and 1550 nm.

E. Taha, G. S. Happawana and Y. Hurmuzlu 2001. American Control Conference June 25-28, California. Quantitative feedback theory (QFT) for chattering reduction and improved tracking in sliding mode control. 

O. D. I. Nwokah, E. Borzova, G. S. Happawana, D. Afolabi 1999.  Proceedings of the 38th Conference on Decision & Control, pp. 2942 – 2950,  December, Phoenix, Arizona. Versal deformations of linear optimal systems.

G. S. Happawana, V. V. Vantsevich 1999.  SAE International Off-Highway and Power Plant Congress and Exposition September 13-15.  Cross country mobility of a 6WD off-road tractor with optimal mass and geometric parameters.

G. S. Happawana, V. V. Vantsevich, O. D. I. Nwokah and M.S. Vysotski  1999.  Second Belarus Congress on Theoretical and Applied Mechanics June 28-30, Minsk, Belarus. Vehicle dynamics as the second dynamics Problem.

Z. Gastineau, G. S. Happawana , and O. D. I. Nwokah 1998.  AIAA Joint Propulsion Conference & Exhibit, July 13-15, Cleveland, Ohio. Robust model-based control for jet engines.

O. D. I. Nwokah, G. S. Happawana, and D. Afolabi 1998.  American Control Conference, Vol.1, 672-678, June 24-26, Philadelphia, PA. Loss of quality in optimal control.

V. V. Vantsevich, G. S. Happawana, and O. D. I. Nwokah 1998.  SAE Truck and Bus Symposium, November 16-18, Indianapolis, Indiana.  Paper #982790. Basis for logical control of circumferential wheel forces of highway trucks for improved traction and fuel efficiency.

O. D. I. Nwokah, G. S. Happawana, and D. Afolabi 1997.  IMECE Proceedings of the ASME dynamic systems and control division, International Mechanical Engineering Congress Exposition, November, 16-21, Vol.61, pp 597-604.  The design of quality engineered control systems.

G. S. Happawana and M. Azene 1994.  Proceedings of the ASEE Gulf    Southwest Conference, Vol. II, pp. 586-592, March 22-25, Baton Rouge, Louisiana. Research experience for undergraduate students.

G. S. Happawana, A. K. Bajaj and O. D. I. Nwokah 1993.  ASME Paper 93-GT-266, Proceedings of the ASME Conference for Gas Turbines and Power,  May 24-27, Cincinnati, Ohio. Modal analysis and forced response of coupled mistuned cyclic systems: A singular perturbation approach.

G. S. Happawana, A. K. Bajaj, O. D. I. Nwokah 1993.  Proceeding of the 14th ASME Biennial Conference on Mechanical Vibration and Noise, Vol. 59, pp.1-13, September 19-22 Albuquerque, New Mexico.  Eigenvalue veering perturbed bifurcation theory and modal analysis of mistuned linear systems.

G. S. Happawana, O. D. I. Nwokah and A. K. Bajaj 1991. Proceedings of the 13th ASME Biennial Conference on Mechanical Vibration and Noise, Vol. 34, pp. 253-259, September 22-25, Miami, FL. On the dynamics of perturbed symmetric systems.

G. S. Happawana, A. K. Bajaj and O. D. I. Nwokah 1991.  Proceedings of the 13th ASME Biennial Conference on Mechanical Vibration and Noise, Vol. 34, pp.213-223, September 22-25, Miami, FL.  A singular perturbation analysis of eigenvalue veering and mode localization in perturbed linear chain and cyclic systems.