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Professional Experience
- Professor, Dept. of Eng. Sciences and Materials, UPR
- Mayaguez (1/90-present)
- Professor of Computer Science, Tennessee Tech. University (1/85-1/90)
- Professor, General Engineering UPR
- Mayaguez (11/79-1/85)
- Postdoctoral fellow, Northwestern University (6/77-10/79)
- Software Engineer and consultant, Texas Instruments (May '87 - May '89)
- Chief numerical analyst, Operation Technology (Jan. '86 - Oct. '92)
Professional Affiliations
- Association for Computing Machinery
- American Academy of Mechanics
- The Mathematical Association of America.
Professional Preparation
- M.S. in Computer Science, Dec. 1983, Memphis State University, Memphis, Tennessee.
- Ph.D. in Theoretical Mechanics, May 1977, Illinois Institute of Technology, Chicago, Illinois. Subject of thesis: Stress Clock Function in Viscoelastic Materials. Thesis advisor: Barry Bernstein.
- M.S. in Mechanics, May 1974, Illinois Institute of Technology, Chicago, Illinois. Subject of thesis: Design and modeling of air flow equipment and heat panels associated with heating and cooling of buildings.
- B.S. in Mechanical Engineering, Dec. 1971, Louisiana State University, Baton Rouge, Louisiana. Area of concentration: machine design.
- IFRICS (Institute For Retraining In Computer Science) Certificate of Completion, Clarkson University, Potsdam, New York, 1985-1986
- Unix System Management, Digital Equipment Corp., Landover, MD, Summer 1989.
- Unix System Programming, Digital Equipment Corp., Landover, MD, Summer 1989.
- Novell Netware System Management, Novell, San Juan, PR, Spring 1991.
- Vibration and Damping Workshop, University of Dayton, July 1993.
- Programming in AutoLisp, Union, NJ, December 1993.
Selected Publications and Presentations
- Shokooh, A. and Suarez, L. "On the Laplace Transform Solution of the Semi-differential Equation of Motion of a Single DOF Oscillator," Proceedings of the 10th Conference of Engineering Mechanics, Ed. Stein Sture, University of Colorado at Boulder, May 21-24, 1995, pp. 1267-1271.
- "On the Response of Systems with damping Materials Modeled using Fractional Calculus," co-authored with L. Suarez, Proceedings of the 10th ASCE Engineering Mechanics Conference, University of Colorado at Boulder, May 21-24, 1995 (refereed papers only).
- Suarez, L. and Shokooh, A., "Fractional Derivative Modeling of Systems with Damping Materials," special issue of the ASME Applied Mechanics Review, November 1995 (in press).
- Suarez, L. and Shokooh, A ,"Finite Element Analysis of Beams with Damping Materials", Applied Mechanics Reviews, Volume 50, Number 11, Nov. 1997 .
- "Comparison of Numerical Methods Applied to Fractional Model of Damping Materials," Journal of Vibration and Control, 1999.
- "Eigenvector Expansion for the Solution of Equations of Motion with Fractional Damping," accepted for publication in Applied Mechanics.
- "Solution of Nonlinear Equations of Motion with Fractional Damping;" in preparation.
- "On the Fourier Transform Solution of Semi-differential Equations of Motion;" in preparation.
Synergistic Activities
Postdoctoral Fellowship
Northwestern University (5-1977 to 10-1979). Cooperator: Professor S. Nemat- Nasser.
Research Felowship
NASA Goddard Space Flight Center (Summer 2000 and 2001). Analysis,
modeling and design of vibration and noise controls in spacecrafts.
NASA Langley Research Center (Summer 2003). Probabilistic analysic of dynamical structures.
Grants
Received a three-year grant from NASA-Langley to carry out basic research on the mechanism and response of materials with damping, vibration and noise control.
Seminars Offered
A 5-day seminars on "Effective Teaching of Mathematics to Engineering Students," Dept. of Mathematics, Interamerican University, Bayamon, PR, Jan. 1994.
Have offered a number of on/off-Campus seminars on C, C++, computer graphics, and computational mechanics for private and public sector employees.
Summary of Research and Experience
Summer 2000 and 2001, NASA’s Goddard Space Flight Center. Examined, and developed effective models for,
controlling an spacecraft’s vibration and noise due to the random acoustic load produced by the rocket’s thrusters. The work required studying and analyzing the geometry, structure and materials of spacecraft’s decks and recommending ways to control the vibration and the modeling of the finite element method of the structure.
Examined, and developed mathematical models to represent, static and dynamic behavior of various types of materials (elastic, viscoelastic, viscoplastic, porous, etc.) undergoing various types of deformations.
Examined, and developed mathematical models to represent, the response of various structures (machine elements, foundations, structures, and so on) with damping materials subjected to a variety of loading conditions (constant, time varying, random), as a function of temperature and frequency, using fractional calculus, and developed mathematical model.
Examined the stability of some of the widely used elsto-plastic models.
Analyzed the mechanism and performance of heat panels and the associated air carrying apparatus, and assisted in their design.
Estimating lines of codes (LOC), cost of medium and large software, and qualitative evaluation of large real-time systems, database systems, and decision-support systems.
Authored a comprehensive set of guidelines for the entire development cycle of a project beginning with the analysis phase through the testing and integration phase.
Have developed a number of engineering, technical, scientific, application and system software of medium to large size.
Have devised efficient algorithms to handle large electrical network load flow with circuit breakers, short circuit problems, and dynamic stability problems.
Honors and Awards
Four year on the Dean's Honor List at Louisiana State University; three times recipient of the International Scholarship award; three times recipient of the President Scholarship award; recipient of the honorary membership to the Honor Society of Phi Kappa Phi; graduated cum laude; recipient of various fellowships and research assistantship during graduate years.
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