### Rafi L. Muhanna

##### Associate Professor

###### Mason 4156

###### 404.385.1825

## Biography

Dr. Muhanna is an associate professor in the School of Civil and Environmental Engineering at Georgia Institute of Technology. He obtained his B.S. in Civil Engineering from the University of Damascus in 1972, and his M.S. and Ph.D. degrees in the area of Solid and Structural Mechanics in 1976 and 1979, respectively from the Higher Institute for Structure and Architecture, Sofia, Bulgaria. He joined the faculty at the University of Damascus, Syria in 1980, and has also served on the faculty at Case Western Reserve University, Ohio and the University of Maryland (1991-2000).Dr. Muhanna has won a number of international prizes, among them: the Aga Khan Award for Architecture, one of the most prestigious international architectural awards, for the his masonry shell system without steel reinforcement (1992); the Golden Prize of the World Intellectual Property Organization (WIPO), for the best displayed patent at the International Fair of Damascus (1988); and the Special Prize of the United Nations HABITAT (1989).Dr. Muhanna's research activity is in the general area of solid and structural mechanics that includes uncertainty modeling, structural reliability, computational reliability, shell theory, and optimization of masonry building materials in structural systems. This research activity has culminated in the development of the new methods for reliable engineering computing, establishment of the Center for Reliable Engineering Computing (REC), and hosting the bi-annual international NSF sponsored workshop on Reliable Engineering Computing since 2004.

## Education

- Ph.D., Higher Institute for Structure and Architecture, Sofia, Bulgaria, Civil Engineering, Solid and Structural Mechanics, 1979.
- M.Sc., Higher Institute for Structure and Architecture, Sofia, Bulgaria, Structural Engineering, 1976.
- B.Sc., University of Damascus, Syria, Civil Engineering, 1972.

## Research Interests

- Computational solid and structural mechanics
- Uncertainty modeling
- Reliable engineering computing
- Structural reliability
- Finite elements

## Honors

- Teaching Fellow, George W. Woodruff School Teaching Fellow, 2014.
- Thank a Teacher certificate, 2011, in recognition for excellence in teaching, Georgia Institute of Technology.
- The Architectural Personality of the Arab World, 1993, selected by magazine Al-Majala, London, U. K. The selection areas are Politics, Economics, Literature, Medicine and Art.
- Award from the Government of Syria, 1993. For the structural analysis and design of the Unknown Soldier Memorial, Damascus. http://www.gtsav.gatech.edu/rec/unknownsoldier/The_Unknown_Soldier.jpg
- The Aga Khan Award for Architecture, 1992. In recognition of the new cylindrical shell structural system without steel reinforcement, flexibility in construction, and economy.
- One of the most prestigious international architectural awards in the world, for recognition of architectural excellence. Awarded triennially. The award is announced in more than 150 specialized journals and approximately 400 newspapers throughout the world. http://www.akdn.org/architecture/project.asp?id=1238
- The Special Prize of the United Nations Center for Human Settlements (HABITAT), 1989.
- The Silver Medal of the Fifth Biennale of Architecture Interarch '89, Sofia, Bulgaria, 1989.
- The Gold Prize of the World Intellectual Property Organization (WIPO), United Nations Organization, Geneva, 1988.

## Patents

- 1996 Patent, 60/026085, September 13, 1996, “Device and Method for Evaluation of Mechanical Behavior for All Possible Loading Combinations, “U. S., provisional.
- 1988 Patent No. 4219, May 30, 1988, for “A New System for the Construction of Houses and Buildings using Natural Stone Shells, “Syria.

## Articles

- N. Xiao, F. Fedele, and R. L. Muhanna, Interval-based parameter identification for structural static problems, Reliable Computing, Vol 23, pp. 47-72, July, 2016.
- Xiao, N., Muhanna, R., Fedele, F., and Mullen, R. (2015). Interval Finite Element Analysis of Structural Dynamic Problems, SAE Int. J. Mater. Manf. 8(2):382-389.
- Xiao, N., Muhanna, R., Fedele, F., and Mullen, R. (2015). Uncertainty Analysis of Static Plane Problems by Intervals, SAE Int. J. Mater. Manf. 8(2):374-381.
- Fedele, F., Muhanna, R., Xiao, N., and Mullen, R. (2015). Interval-Based Approach for Uncertainty Propagation in Inverse Problems, ASCE J. Eng. Mech., 141(1), 06014013.
- Rafi L. Muhanna, Robert Mullen and M. V. Rama Rao (2015). Nonlinear FEA of Frames under Interval Material And Load Uncertainty, ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part B: Mechanical Engineering,1(4):041003-041003-8. doi:10.1115/1, 4030609.
- M.V.Rama Rao, , Robert Mullen, and Rafi.L. Muhanna, (2015). Geometric misfitting in trusses and frames: an interval-based approach, Int. J. Reliability and Safety, Vol. 9, No. 2/3.
- Xiao Naijia, Rafi L. Muhanna, Francesco Fedele, and Robert. L. Mullen. Interval Finite Element Analysis of Planar Frames with Uncertainties in Load, Geometry and Material, ASCE, J. Engineering Mechanics. (in press)
- Rafi L. Muhanna, Robert L. Mullen, and M. V. Rama Rao, Nonlinear FEA of Frames under Interval Material and Load Uncertainty, ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part B: Mechanical Engineering,1(4):041003-041003-8. doi:10.1115/1, 4030609.
- Francesco Fedele, Rafi L. Muhanna, Naijia Xiao, and Robert Mullen. An Interval-Based Approach for Uncertainty Propagation in Inverse Problems, ASCE, J. Engineering Mechanics, 10.1061/ (ASCE) EM.1943-7889.0000815, 2014.
- Rafi L. Muhanna, M. V. Rama Rao, and Robert L. Mullen. Advances in Interval Finite Element Modelling of Structures, J. Life Cycle Reliability and Safety Eng. (SRESA) Vol. 2, issue 3, pp. 15-22, 2014.
- Ehsan Jahani, Rafi L. Muhanna, Mohsen A. Shayanfar, Mohammad A. Barkhordari. Reliability assessment with fuzzy random variables using Interval Monte Carlo Simulation, Computer-Aided Civil and Infrastructure Engineering, Vol. 29, issue 3, pp. 208-220, 2014.
- Hao Zhang, R. L. Mullen, and R. L. Muhanna, “Structural analysis with probability-boxes”, Int. J. Reliability and Safety, Vol. 6, Nos. 1/2/3, 2012.
- M. V. Rama Rao, R. L. Mullen, and R. L. Muhanna, “A New Interval Finite Element Formulation with the same accuracy in primary and derived variables”, Int. J. Reliability and Safety, Vol. 5, Nos. 3/4, 2011.
- Zhang Hao; Mullen Robert L; Muhanna Rafi L, “Interval Monte Carlo methods for structural reliability”, J. Structural Safety, Vol. 32. Issue 3, pp. 183-190, 2010.
- Zhang, Hao, Muhanna, Rafi. L., "Interval Approach for Nondeterministic Linear Static Finite Element Method in Continuum Mechanics Problems, “Int. J. Reliability and Safety. Vol. 3, No. 1/2/3, pp. 201-217, 2009.
- Zalewski, B.F., Mullen, R. L. and Muhanna, R. L. “Fuzzy Boundary Element Method for Geometric Uncertainty in Elasticity Problem”, SAE Int. J. of Materials & Manufacturing, 2:310-316, October 2009.
- Zalewski, B.F., Mullen, R. L. and Muhanna, R. L., “Interval Boundary Element Method in the Presence of Uncertain Boundary Conditions, Integration, and Truncation Errors, ” Journal of Engineering Analysis with Boundary Elements. Vol. 33, Issue 4, pp. 508-513, 2009.
- Muhanna, R. L., Mullen, R. L., and Zhang, H.," Combined Axial and Bending Stiffness in Interval Finite Element Methods," Journal of Structural Engineering-ASCE, Vol. 133, No. 12, pp. 1700-1709, 2007.
- Muhanna, R., Mullen, R., and Zhang, H., "Interval Finite Element as a Basis for Generalized Models of Uncertainty in Engineering Mechanics,” Reliable Computing Journal, Springer Netherlands, Vol. 13, No. 2, pp. 173-194, April 2007.
- Mehdi Modares, Robert Mullen, Paul X. Bellini, and Rafi L. Muhanna, “Buckling Analysis of Structures with Interval Uncertainties”, SAE Transactions Journal of Passenger Cars –Mechanical Systems, pp. 284-290, March 2006.
- Pereira, S., Mello, U., Nelson, M., and Muhanna R., L. "Uncertainty in Thermal Basin Modeling: An Interval Finite Element Approach, " Journal of Reliable Computing, Springer Netherlands, Vol. 12, No. 6, pp. 451-470, December 2006.
- Modares, M., Mullen, R., L. and Muhanna, R. L. " Natural Frequency of a Structure with Bounded Uncertainty, "Journal of Engineering Mechanics, ASCE, Vol. 132, No. 12, pp. 1363-1371, 2006.
- Muhanna, R. L., Mullen, R. L., and Zhang, H., "Penalty-Based Solution for the Interval Finite Element Methods, "Journal of Engineering Mechanics, ASCE, Vol. 131, No. 10, pp.1102-1111, 2005.
- Muhanna, R. L. and Mullen, R. L., "Uncertainty in Mechanics Problems - Interval-Based Approach, "Journal of Engineering Mechanics, ASCE, Vol. 127, No. 6, pp 557-566, 2001.
- Muhanna, R. L. and Mullen, R. L., "Treatment Of Geometric Tolerances In Finite Element Analysis," International Journal of Advanced Manufacturing Systems, Vol. 4, No. 1, pp 143-162, 2001.
- Muhanna, R. L. and Mullen, R. L., "Formulation of Fuzzy Finite Element Methods for Mechanics Problems, " Computer-Aided Civil and Infrastructure Engineering (previously Microcomputers in Civil Engineering), Vol.14, pp 107-117,1999.
- Mullen, R. L. and Muhanna, R. L. "Bounds of Structural Response for All Possible Loadings, "Journal of Structural Engineering, ASCE, Vol. 125, No. 1, pp 98-106, 1999.
- Muhanna, Rafi L., Ayyub, Bilal M. "Uncertainty Analysis of Structural Strength of Stiffened Panels," Naval Engineers Journal, Vol. 108, No. 3, pp 399-418, 1996.
- Muhanna, R. L., "A New Assumed Natural Strain Formulation of the Shallow Shell Element," Communications in Numerical Methods in Engineering, Vol. 9, pp 989-1004, 1993.
- Muhanna, Raif L., Muhanna, Rafi L., and Muhanna, Z. L., "Construction System with Natural Stone in Syria, "Journal Architektur (Germany), Vol. 7, 1988.
- Muhanna, R. L. "The Analysis of Shallow Shells by Finite Element Method, J. Structures (in Bulgarian), Vol. 7, 1978.

## Books

- Muhanna, R. L. and Mullen, R. L., Interval Based Finite Elements for Uncertainty Quantification in Engineering Mechanics, Chapter in Uncertainty Quantification in Scientific Computing, IFIP, International Federation for Information Processing 2012. (ISBN: 978-3-642-32676-9)
- Muhanna, R. L. and Mullen, R. L., Interval Methods for Reliable Computing, Chapter in Reliability Design Handbook, CRC Press LLC, ISBN 0-8493-1180-2, edited by Efsratios Nikolaidis and Dan Ghiocel, 2005.

## Proceedings

- M. V. Rama Rao, R. L. Muhanna, and R. L. Mullen. Interval Finite Element Analysis of Thin Plates, REC 2016, Proceedings of REC 2016, pp 111-130.
- Naijia Xiao, Francesco Fedele, and Rafi Muhanna. Structural Dynamic Response under Uncertainty-An Interval Finite Element Approach, Proceedings of REC 2016, pp 225-239.
- Naijia Xiao, Robert Mullen, and Rafi Muhanna. Static Analysis of Structural Systems with Uncertain Parameters Using Probability-Box, Proceedings of REC 2016, pp 453-468.
- N. Xiao, F. Fedele, and R. L. Muhanna, Interval Finite Element Approach for Modal Analysis of Linear Elastic Structures Under Uncertainty, Proceedings of the 34th IMAC 2016, Model Validation and Uncertainty Quantification, 2016, Volume 3, pp 143-150.
- M.V.Rama Rao, Rafi.L. Muhanna, and Robert Mullen (2015). Analysis of a space truss by interval finite element approach, Proc. National Conference on Structures and Materials (NCASM-15), KS School of Engineering and Management, Bangalore, India, pp.30-34.
- Rafi Muhanna, Robert Mullen, M.V.Rama Rao,’ Nonlinear Interval Finite Elements For Beams’, Second International Conference on Vulnerability and Risk Analysis and Management (ICVRAM2014) ,13 - 16 July 2014, University of Liverpool, UK, Michael Beer, Ivan S.K. Au & Jim W. Hall (editors), 2014.
- M.V. Rama Rao, Rafi L. Muhanna and Robert L. Mullen. Geometric Misfitting in Structures – Interval-Based Approach. REC 2014, May 25-28, 2014, Illinois Institute of Technology, Chicago, Illinois, 2014.
- Robert L. Mullen, Rafi L. Muhanna, and M.V.Rama Rao. Non-Linear Analysis of Beams with Large deflections – An Interval Finite Element Approach. REC 2014, May 25-28, 2014, Illinois Institute of Technology, Chicago, Illinois, 2014.
- Mullen, R. L., and Muhanna, R. L. Probability Bounds for the System Response of Non-Linear Structures, in Deodatis, Bruce R. Ellingwood, Dan M. Frangopol ICOSSAR 2013, CRC press, ISBN: 978-1-138-00086-5, pp. 499–502, 2013.
- Steffen Freitag, Rafi L. Muhanna, and Wolfgang Graf. Interval And Fuzzy Monte Carlo Simulation with Neural Network Based Surrogate Models, in Deodatis, Bruce R. Ellingwood, Dan M. Frangopol ICOSSAR 2013, CRC press, ISBN: 978-1-138-00086-5, pp. 431–438.
- Naijia Xiao, Rafi L. Muhanna, Francesco Fedele, and Robert L. Mullen. Interval Finite Elements for Uncertainty in Frame Structures, in Deodatis, Bruce R. Ellingwood, Dan M. Frangopol ICOSSAR 2013, CRC press, ISBN: 978-1-138-00086-5, 2979–2985.
- Naijia Xiao, , Francesco Fedele, and Rafi L. Muhanna. Inverse Problems Under Uncertainties-An Interval Solution for the Beam Finite Element, in Deodatis, Bruce R. Ellingwood, Dan M. Frangopol ICOSSAR 2013, CRC press, ISBN: 978-1-138-00086-5, 2971-
- M.V.Rama Rao, Rafi L.Muhanna and Robert L. Mullen. Interval Finite Element Modeling of Space Trusses, National Conf. on New Horizons in Civil Eng.-NHCE 2013, April 12-13, 2013, MIT, Manipal, India.
- Fedele, Francesco and Muhanna, R. L. “Interval-based Inverse Problems with Uncertainties”, the 16th IFAC Symposium on System Identification, Brussels, Belgium, July 11-13, 2012.
- Muhanna, R. L., Mullen, R. L., and Rama Rao, M. V. “Nonlinear Interval Finite Element for Structural Mechanics Problems ,” Proceedings of the International conference on Reliable Engineering Computing “Practical Applications and Practical Challenges”, Brno, Czech Republic, June 13-15, 2012.
- Fedele, Francesco and Muhanna, R. L. “Interval Solution for Inverse Problems under uncertainty” Proceedings of the International conference on Reliable Engineering Computing “Practical Applications and Practical Challenges”, Brno, Czech Republic, June 13-15, 2012.
- Freitag, S., Muhanna, R. L., and Graf, W. “A Particle Swarm Optimization Approach for Training Artificial Neural Networks with Uncertain Data,” Proceedings of the International conference on Reliable Engineering Computing “Practical Applications and Practical Challenges”, Brno, Czech Republic, June 13-15, 2012.
- Rama Rao, M. V., Mullen, R. L., and Muhanna, R. L. “Interval finite elements for nonlinear material problems”, Proceedings of the 11th International Conference on Applications of Statistics and Probability in Civil Engineering, Zurich, Switzerland, Faber, Kohler & Nishijima (eds), ISBN 978-0-415-66986-3, August 1-4, 2011.
- Zhang, H., Mullen, R. L., and Muhanna, R. L.”Interval Estimates of Structural Reliability”, Proceedings of the International workshop on Reliable Engineering Computing “Robust Design-Coping with Hazards, Risk and Uncertainty”, Research Publishing, pp. 386-395, National University of Singapore, Singapore, March 2010.
- Zhang, H., Mullen, R. L., and Muhanna, R. L.”Finite Element Structural Analysis using Imprecise Probabilities Based on P-Box Representation”, Proceedings of the International workshop on Reliable Engineering Computing “Robust Design-Coping with Hazards, Risk and Uncertainty, ”Research Publishing, pp. 211-225, National University of Singapore, Singapore, March 2010.
- Rama Rao, M. V., Mullen, R. L., and Muhanna, R. L. “Primary and Derived Variables with the Same Accuracy in Interval Finite Elements” Proceedings of the International workshop on Reliable Engineering Computing “Robust Design-Coping with Hazards, Risk and Uncertainty, ” Research Publishing, pp. 129-148, National University of Singapore, Singapore, March 2010.
- Zhang, Hao and Muhanna, Rafi L. “Interval Estimates of Structural Reliability, “Proceedings of the 10th International Conference on Structural Safety and Reliability (ICOSSAR 2009), Osaka, Japan, September 13-17, 2009.
- B.F. Zalewski, R.L. Mullen, R.L. Muhanna, “Boundary Element Analysis of Systems Using Interval Methods”, Proceedings of the NSF Workshop on Reliable Engineering Computing, Georgia Tech, Savannah, GA, February 22-24, 2006.
- Rafi Muhanna, Vladik Kreinovich, Pavel Solin, Jack Chessa, Roberto Araiza, and Gang Xiang, “Interval Finite Element Methods: New Directions”, Proceedings of the Rafi L. Muhanna Curriculum Vitae 8 NSF Workshop on Reliable Engineering Computing, Georgia Tech, Savannah, GA, February 22-24 2006.
- Rafi L. Muhanna, Ayše Erdolen and Robert Mullen, “Geometric Uncertainty in Truss Systems: An Interval Approach”, Proceedings of the NSF Workshop on Reliable Engineering Computing, Georgia Tech, Savannah, GA, February 22-24, 2006.
- Zhang, H., Muhanna, R. Mullen, R., "Finite Element Analysis for Uncertain Structures: An Interval Approach," Proceedings of the 9th International Conference on Structural Safety and Reliability (ICOSSAR 2005), Rome, Italy, June 19-23, 2005.
- Modares, M., Mullen, R., Bellini, P., and Muhanna, R., “Buckling Analysis of Structures with Interval Parameters,” Proceedings of the 2005 SAE World Congress, Reliability and Robust Design in Automotive Engineering, Detroit, Michigan, April 11-14, 2005.
- Muhanna, R., Mullen, R. and Zhang, H., “Interval Finite Element as a Basis for Generalized Models of Uncertainty in Engineering Mechanics,” Proceedings of the NSF Workshop on Reliable Engineering, Georgia Tech, Savannah, GA, September 15-17, 2004.
- Modares, M., Mullen, R., Muhanna, R., and Zhang, H., "Buckling Analysis of Structures with Uncertain Properties and Loads Using an Interval Finite Element Method," Proceedings of the NSF Workshop on Reliable Engineering, Georgia Tech, Savannah, GA, September 15-17, 2004.
- Zhang, H. and Muhanna, R. “Finite Element Analysis for Structures with Interval Parameters,” Proceedings of the 9th ASCE joint Specialty Conference on Probabilistic Mechanics and Structural Reliability, New Mexico, July 26-28, 2004.
- Muhanna, R. L. and Mullen, R. L., " Critical Issues in the Application of Interval Methods to Finite Element Analysis, " Proceedings of SCAN2002, 10th GAMM - IMACS International Symposium on Scientific Computing, Computer Arithmetic, and Validated Numerics, Paris, France, September, 24-27, 2002.
- Mullen, R. L. and Muhanna, R. L. "Interval Methods for Finite Element Solution," Proceedings of the High Performance Computing Systems and Applications, HPCS’2002, IEEE, editors: Almhana J. N. and Bhavsar V. C., Moncton, NB, Canada June 16-19,. 2002.
- Muhanna, R. L. and Mullen, R. L., "Sharp Rigorous Bounds On Interval Estimates For Finite Solutions With Uncertain Material Properties, " Proceedings of the 2000 NSF Design & Manufacturing Research Conference, Vancouver, British Columbia, Canada, January 3-6, 2000.
- Muhanna, R. L. and Mullen, R. L., "Sharp Enclosure for Material Uncertainty in Solid and Structural Mechanics-Interval Based Approach, Part II, " Proceedings of the Eighth ASCE Joint Specialty Conference on Probabilistic Mechanics and Structural Reliability University of Notre Dame, Notre Dame, Indiana July 24-26, 2000.
- Muhanna, R. L. and Mullen, R. L., "Sharp Enclosure for Material Uncertainty in Solid and Structural Mechanics-Interval Based Approach, Part I, " Proceedings of the Eighth ASCE Joint Specialty Conference on Probabilistic Mechanics and Structural Reliability University of Notre Dame, Notre Dame, Indiana July 24-26, 2000.
- Mullen, R. L. and Muhanna, R., L., "Sharp Interval Estimates for Finite Element Solutions with Fuzzy Material Properties, " Proceedings of the 14th ASCE Rafi L. Muhanna Curriculum Vitae 9 Engineering Mechanics Conference, The University of Texas at Austin, May 21-24, 2000.
- Muhanna, R. L. and Mullen, R. L., "Interval based Methods for Load and Stiffness Uncertainty in Computer-Aided Analysis, " Proceedings of the 1999 NSF Design & Manufacturing Grantees Conference, Queen Mary, Long Beach, CA, January 5-8, 1999.
- Mullen, R. L. and Muhanna, R., L., "Interval-Based Geometric and Material Uncertainty for Mechanics Problems," Proceedings of the 13th ASCE Engineering Mechanics Division Conference, The Johns Hopkins University, Baltimore, MD, June 13-16, 1999.
- Mullen, R. L. and Muhanna, R. L., "Interval Based Finite Element Methods, " Proceedings of Recent Advances in Numerical Methods and Applications, editors: Iliev O. P., Kaschiev M. S., Margenov S. D., Sendov Bl. H., Vassilevski P. S., World Scientific Publishing Co. Pte. Ltd., 1999.
- Muhanna, R., Ballarini, R. and R. Mullen, "Calculation of Stress Intensity Factors with Fuzzy Loading, " Proceedings of the 4-th International Conference on Stochastic Structural Dynamics, University of Notre Dame, Notre Dame, IN, USA, Aug. 6-8, 1998. http://www.nd.edu/~ssd98/.
- Muhanna, R. L. and Ayyub, B. M. "Modeling Geometric Uncertainties of Continuum Mullen, R. L. and Muhanna, R. L. "Structural Analysis with Fuzzy-Based Load Uncertainty, " Proceedings of the 7th ASCE EMD/STD Joint Specialty Conference on Probabilistic Mechanics and Structural Reliability, WP I, MA, pp 310-313, August 7-9, 1996.
- Structures for Reliability Assessment Purposes, " Proceedings of ISUMA-NAFIPS’95, pp 705-710, September 17-20, 1995.
- Muhanna, R. L. and Mullen, R. L. "Development of Interval Based Methods for Fuzziness in Continuum Mechanics, " Proceedings of ISUMA-NAFIPS’95, pp 145-150, September 17-20, 1995.
- Muhanna, R. L., "Local Building Materials and a New System for Houses and Buildings, " The First Symposium on Quality Control of Structures And Building Materials, Sana'a, Yemen, January 1990.
- Muhanna, R. L., "The Policies of Planning and Design of Earthquake Resistant Constructions," Symposium on December '82 Earthquake Relief and Reconstruction Program, Sana'a, Yemen, April 1989.
- Muhanna, R. L., AL-Hasan, A., and AL-Jabri, L., "New Aspects of a Traditional Material," Symposium of Low Cost Rural Housing, Dara'a, Syria, September 1982.

## Presentations

- "Nonlinear Interval Finite Elements For Beams", Second International Conference on Vulnerability and Risk Analysis and Management (ICVRAM2014) ,13 - 16 July 2014, University of Liverpool, UK.
- "Geometric Miss-fitting in Structures – Interval-Based Approach", REC2014, May 25-28, 2014, Illinois Institute of Technology, Chicago, Illinois, 2014.
- "Non-Linear Analysis of Beams with Large deflections – An Interval Finite Element Approach", REC2014, May 25-28, 2014, Illinois Institute of Technology, Chicago, Illinois, 2014.
- “Probability Bounds for the System Response of Non-Linear Structures,” ICOSSAR 2013, 11th International Conference on Structural Safety & Reliability, June 16-20, 2013, Columbia University, New York, NY.
- “Interval And Fuzzy Monte Carlo Simulation with Neural Network Based Surrogate Models,” ICOSSAR 2013, 11th International Conference on Structural Safety & Reliability, June 16-20, 2013, Columbia University, New York, NY.
- “Interval Finite Elements for Uncertainty in Frame Structures,” ICOSSAR 2013, 11th International Conference on Structural Safety & Reliability, June 16-20, 2013, Columbia University, New York, NY.
- “Inverse Problems Under Uncertainties-An Interval Solution for the Beam Finite Element,” ICOSSAR 2013, 11th International Conference on Structural Safety & Reliability, June 16-20, 2013, Columbia University, New York, NY.
- “National Conference on New Horizons in Civil Engineering, April 12-13, 2013, MIT, Manipal, India, NHCE 2013, 11th International Conference on Structural Safety & Reliability, June 16-20, 2013, Columbia University, New York, NY.”
- "Probability Bounds for Nonlinear Finite Element Analysis," SIAM Conference on Uncertainty Quantification (UQ12), Raleigh, North Carolina, USA, April 2-5, 2012.
- "Interval-Based Inverse Problems with Uncertainties," SIAM Conference on Uncertainty Quantification (UQ12), Raleigh, North Carolina, USA, April 2-5, 2012.
- "Identification of Uncertain Time-Dependent Material Behavior with Artificial Neural Networks," SIAM Conference on Uncertainty Quantification (UQ12), Raleigh, North Carolina, USA, April 2-5, 2012.
- “Interval Based Finite Elements for Uncertainty Quantification in Engineering Mechanics”, Invited lecture at Armstrong Atlantic State University, Savannah, GA, December 06. 2011.
- “Interval Based Finite Elements for Uncertainty Quantification in Engineering Mechanics”, International Federation of Information Processing (IFIP) -Working Conference on Uncertainty Quantification in Scientific Computing, organized by NIST, Boulder, CO, USA, August 1- 4, 2011.
- “Interval Finite Elements as a Basis for Generalized Models of Uncertainty in Engineering Mechanics”, Invited lecture at University of South Carolina, Colombia, SC, April 01. 2011.
- “Primary and Derived Variables with the Same Accuracy in Interval Finite Elements”, The International workshop on Reliable Engineering Computing “Robust Design-Coping with Hazards, Risk and Uncertainty,”National University of Singapore, Singapore, March 3-5, 2010.
- “Interval Estimates of Structural Reliability”, The International workshop on Reliable Engineering Computing “Robust Design-Coping with Hazards, Risk and Uncertainty, “National University of Singapore, Singapore, March 3-5, 2010.
- “Finite Element Structural Analysis using Imprecise Probabilities Based on P-Box Representation”, The International workshop on Reliable Engineering Computing “Robust Design-Coping with Hazards, Risk and Uncertainty, “National University of Singapore, Singapore, March 3-5, 2010.
- “Interval Estimates of Structural Reliability”, 10th International Conference on Structural Safety and Reliability (ICOSSAR 2009), Osaka, Japan, September 13-17, 2009.
- “Modeling of failure surface of a reinforced concrete slab with fuzzy loading - an interval approach”, The 13th GAMM - IMACS International Symposium on Scientific Computing, Computer Arithmetic and Verified Numerical Computations, University of Texas at El Paso, September 29 - October 3, 2008.
- “Exact Hull of Linear Interval Equations with Matrices Arising from Engineering Applications”, The 13th GAMM - IMACS International Symposium on Scientific Computing, Computer Arithmetic and Verified Numerical Computations, University of Texas at El Paso, September 29 - October 3, 2008.
- “Interval Finite Elements as a Basis for Generalized Models of Uncertainty in Engineering Analysis”, The Collaborative Research Center 528, German National Science Foundation (DFG), TU Dresden, Germany, June 19, 2007.
- “Interval Finite Element Methods: An Overview and Latest Development”, International NSF Workshop on Finite Element Methods and their applications to Science and Engineering. University of Texas, Elpaso, Texas, December 11-15, 2006.
- “Boundary Element Analysis of Systems Using Interval Methods”, The NSF Workshop on Reliable Engineering Computing, Georgia Tech, Savannah, GA, February 22-24, 2006.
- “Interval Finite Element Methods: New Directions”, The NSF Workshop on Reliable Engineering Computing, Georgia Tech, Savannah, GA, February 22-24 2006.
- “Geometric Uncertainty in Truss Systems: An Interval Approach”, The NSF Workshop on Reliable Engineering Computing, Georgia Tech, Savannah, GA, February 22-24, 2006.
- “Intervals in Structural Engineering”,Second Scandinavian Workshop on Interval Methods and Their Applications. Technical University of Denmark, Copenhagen, August 25-27, 2005.
- “Finite Element Analysis for Uncertain Structures: An Interval Approach”, The 9th International Conference on Structural Safety and Reliability (ICOSSAR 2005), Rome, Italy, June 19-23, 2005.
- “Buckling Analysis of Structures with Interval Parameters”, The 2005 SAE World Congress, Reliability and Robust Design in Automotive Engineering, Detroit, Michigan, April 11-14, 2005.
- “ Interval Finite Element as a Basis for Generalized Models of Uncertainty in Engineering Mechanics”, The NSF Workshop on Reliable Engineering, Georgia Tech, Savannah, GA, September 15-17, 2004.
- “Buckling Analysis of Structures with Uncertain Properties and Loads Using an Interval Finite Element Method”, The NSF Workshop on Reliable Engineering, Georgia Tech, Savannah, GA, September 15-17, 2004.
- “ Finite Element Analysis for Structures with Interval Parameters”, The 9th ASCE joint Specialty Conference on Probabilistic Mechanics and Structural Reliability, New Mexico, July 26-28, 2004.
- “Information Content, Finite Element Analysis, and Interval Methods”, Validated Computing 2002, A SIAM Workshop, Toronto, Canada, May 23-25, 2002.
- “Reliable Engineering Computing”, Invited lecture at Georgia Institute of Technology, Department of Civil & Environmental Engineering, Structural graduate seminar, November 25, 2003.
- “Towards Reliable Engineering Computing-Interval Finite Element Methods”, Sun HPC Consortium, Phoenix, Arizona, November 15-16, 2003.
- “Modeling of Engineering Systems under Uncertainty-Interval-Based Approach”, JANNAF Workshop on Simulation-Based Design in the Face of Uncertainty, Huntsville, Alabama, July 20, 2003.
- “Penalty-Based Solution for the Interval Finite Element Methods”, First Scandinavian Workshop on Interval Methods and Their Applications, Technical University of Denmark, Copenhagen, Denmark, August 14-16, 2003.
- “Modeling of Engineering Systems under Uncertainty”, Invited lecture at Petrobras Research Center, Rio de Janeiro, Brazil, November, 12, 2002.
- “Fundamental Concepts for Interval-based Finite Element Formulations”, Invited lecture at Federal University of Rio de Janeiro, Rio de Janeiro, Brazil, November 01, 2002.
- "Critical Issues in the Application of Interval Methods to Finite Element Analysis”, SCAN2002, 10th GAMM - IMACS International Symposium on Scientific Computing, Computer Arithmetic, and Validated Numerics, Paris, France, September, 24-27, 2002.
- “ Interval Methods for Finite Element Solution”,The High Performance Computing Systems and Applications, HPCS’2002, IEEE conference, Moncton, Canada, June 16-19, 2002.
- “Sharp Rigorous Bounds on Interval Estimates for Finite Solutions with Uncertain Material Properties”, The 2000 NSF Design & Manufacturing Research Conference, Vancouver, British Columbia, Canada, January 3-6, 2000.
- “Sharp Enclosure for Material Uncertainty in Solid and Structural Mechanics-Interval Based Approach, Part I”, The Eighth ASCE Joint Specialty Conference on Probabilistic Mechanics and Structural Reliability University of Notre Dame, Notre Dame, Indiana July 24-26, 2000.
- “Sharp Interval Estimates for Finite Element Solutions with Fuzzy Material Properties”, The 14th ASCE Engineering Mechanics Conference, the University of Texas at Austin, May 21-24, 2000.
- “Interval-Based Geometric and Material Uncertainty for Mechanics Problems”, The 13th ASCE Engineering Mechanics Division Conference, the Johns Hopkins University, Baltimore, MD, June 13-16, 1999.
- “Interval based Methods for Load and Stiffness Uncertainty in Computer-Aided Analysis”, The 1999 NSF Design & Manufacturing Grantees Conference, Queen Mary, Long Beach, CA, January 5-8, 1999.
- “Interval Based Finite Element Methods”, Recent Advances in Numerical Methods and Applications, Sofia, Bulgaria, 1999.
- “Calculation of Stress Intensity Factors with Fuzzy Loading”, The 4-th International Conference on Stochastic Structural Dynamics, University of Notre Dame, Notre Dame, IN, USA, Aug. 6-8, 1998.
- “Structural Analysis with Fuzzy-Based Load Uncertainty”, The 7th ASCE EMD/STD Joint Specialty Conference on Probabilistic Mechanics and Structural Reliability, WP I, MA. August 7-9, 1996.
- “Modeling Geometric Uncertainties of Continuum Structures for Reliability Assessment Purposes”, ISUMA-NAFIPS’95, September 17-20, 1995.
- “Local Building Materials and a New System for Houses and Buildings”, The First Symposium on Quality Control of Structures and Building Materials, United Nations, Sana'a, Yemen, January 1990.
- “Finite Element in Shells, A New Assumed Natural Strain Formulation of the Shallow Shell Element”, Invited lecture at Case Western Reserve University, Cleveland, Ohio, June 5, 1992.
- “Conventional Masonry Building Materials in Contemporary Structural Systems”, Invited lecture at Cleveland State University, Cleveland, Ohio, April 22, 1992.
- “Building Materials and Development of Ductile Brick”, Invited lecture at Northwestern University, NSF Center for Science and Technology of Advanced Cement-Based Materials, Evanston IL, March 15, 1992.
- “The Policies of Planning and Design of Earthquake Resistant Constructions”, United Nations Symposium on December '82 Earthquake Relief and Reconstruction Program, Sana'a, Yemen, April 1989.
- “New Aspects of a Traditional Material”, Symposium of Low Cost Rural Housing, Dara'a, Syria, September 1982.