Roger V. Gonzalez, Ph.D., P.E.
LeTourneau University
Longview, TX 75602

Professor, Mechanical & Biomedical Engineering
     Director, Biomedical Engineering
Director and Founder, LEGS (LeTourneau Engineering Global Solutions)

University of Delaware
Adjunct Professor
Mechanical Engineering


Phone: (903) 233-3906
Fax: (903) 233-3901
E-Mail: RogerGonzalez@letu.edu
Office: Glaske Engineering Center, Rm 0119

Roger V. Gonzalez - Publications

Peer-Reviewed Journal Articles

Hunt, B.V., Ramsay, J., and Gonzalez, R.V. (2006) Index of potential maximum moment contributions of Elbow and wrist muscles. (In preparation)

Shull, J, Lopez, J, Gonzalez, R.V. (2006) Real-time EMG- and Haptic- Teleoperated Robotic System for Motor Control Analysis Journal of Neuroscience Methods, 151(2):194-9.

Rask, M.R, Barr, R.E., and Gonzalez, R.V. (2004) Genetically-Designed Neural Networks for Error Reduction in an Optimized Biomechanical Model of the Human Elbow Joint Complex. Computer Methods in Biomechanics and Biomedical Engineering, 7(1), pp. 43-50.

Manal, K., Gonzalez, R.V., Lloyd, D.G., and Buchanan, T.S.  A real-time EMG-Driven virtual arm. (2002) Computers in Biology and Medicine 32: 25-36.

Nieuwenhuis M.K., Gonzalez R.V., van der Net J., Kuis W., Beek F.J.A., Buchanan T.S., Helders P.J.M. (2001) The role of the forearm muscles related to wrist malalignment in juvenile chronic arthritis. Advances of Physiotherapy Vol. 3(3), pp. 108-19.

Gonzalez, R.V., Abraham, L.D., Barr, R.E., and Buchanan, T.S. (1999) Muscle activity in rapid multi-degree-of-freedom elbow movements: solutions from a musculoskeletal model. J. of Biol. Cybernetics  Vol. 80(5), pp. 357-67.

Gonzalez, R.V., Buchanan, T.S., and Delp, S.L. (1997) Interplay of muscle moment arms and architecture in the human wrist. J. Biomechanics  Vol. 30(7), pp. 705-12.

Lester, W.T., Gonzalez, R.V., Fernández, B., and Barr, R.E. (1997) A neural network approach to electromyographic signal processing for a motor control task. ASME J. Dynamic Systems, Measurement, and Control  Vol. 119.

Gonzalez, R.V., Hutchins, E.L., Barr, R.E., and Abraham, L.D. (1996) Development and evaluation of a musculoskeletal model of the elbow joint complex. ASME J. Biomechanical Engineering Vol. 118(1), pp. 32-40.

Hutchins, E.L., Gonzalez, R.V., and Barr, R.E. (1993) Comparison of experimental and analytical torque-angle relationships of the human elbow joint complex. Biomed Sci Instrum.;29:17-24.

Gonzalez, R.V., Andritsos, M.J., Barr, R.E., and Abraham, L.D. (1993) Comparison of Experimental and Predicted Activation Patterns in Ballistic Elbow Joint Movements. Biomed Sci Instrum. 29:9-16.

Peer-Reviewed Conference Proceedings

Green, N., and Gonzalez, R.V. (2007) A novel elastic foundation contact diction algorithm for use in a six degree of freedom knee model,  American Society of Biomechanics Annual Conference, Stanford, CA, Aug, 2007.

Ramsay, J., and Gonzalez, R.V. (2007) Effect of wrist and forearm architecture on wrist radial-ulnar deviation and forearm pronation-supination moment,  American Society of Biomechanics Annual Conference, Stanford, CA, Aug, 2007.

Gonzalez, R.V., Rispin, K.L., Moran, M.K., and Ayers, S.R., and (2007) An R&D strategy to offer a high-quality and low-cost above knee prosthesis in the developing world. 12th World Congress of the Int Soc for P&O, Vancouver, CA, Jul, 2007.

Vaughan, M., Ayers, S.R., and Gonzalez, R.V. (2007) Roll-over shape assessment of prosthetic feet for developing nations, 12th World Congress of the International Society of Prosthetics and Orthotics, Vancouver, Canada, July 2007

Ayers, S.R., Gonzalez, R.V., and Palmer, J.D (2007) Development of a low-cost polycentric knee for trans-femoral amputees in developing nations. 12th World Congress of the Int Soc for P&O, Vancouver, CA, Jul, 2007.

Wisher. M., and Gonzalez, R.V. (2007) Isometric and isokinetic moments in wrist radial-ulnar deviation and forearm pronation-supination. 24th Annual Houston Conf on Biomedical Engineering Research, Houston, TX, Feb, 2007.

Bowen, J. and Gonzalez, R.V. (2007) A device designed to simulate knee motion with ground reaction forces. 24th Annual Houston Conference on Biomedical Engineering Research, Houston, TX, Feb, 2007.

Lopez, J., Field, D., Cronk, S., and Gonzalez, R.V. (2007) Feedback systems optimization to improve user learning and adaptation in a haptic task. 24th Ann Houston Conf on Biomed Engineering Research, Houston, TX, Feb, 2007.

Field, D., Lopez, J., and Gonzalez, R.V. (2007) Complexity interference during learning and adaptation in a haptic task.  24th Annual Houston Conference on Biomedical Engineering Research, Houston, TX, Feb, 2007.

Green, N., and Gonzalez, R.V. (2007) Dynamic contact pressure computation in the tibio-femoral joint.  24th Annual Houston Conference on Biomedical Engineering Research, Houston, TX, Feb, 2007.

Ayers, S.R., Fulginiti, L.A., Gonzalez, R.V, and Rispin, K. (2007) Evaluation of a simplified field system for gait analysis of transfemoral amputees in a developing world context. 24th Annual Houston Conference on Biomedical Engineering Research, Houston, TX, Feb, 2007.

Green, M.G., Hellmuth, T., Leiffer, P.R., Gonzalez, R.V., and Ayers, S.V. (2007) Effectively implementing an interdisciplinary senior design experience: A case study and conclusions. ASEE Annual Conference, Honolulu, HI, June, 2007.

Gonzalez, R.V., Ayers, S., and Rispin, K. (2006) Development of a low-cost, easily manufactured knee technology with improved functionality outcomes for trans-femoral amputees in developing nations. CIR-RERC State of the Science Conference for Improved Technology Access for Landmine Survivors, Chicago, IL, Aug, 2006.

Lopez, J.M. and Gonzalez, R.V. (2006) Human adaptation in a simple bilateral task during simultaneous use of disparate control systems. Biomedical Engineering Society Annual Meeting, Chicago, IL, Oct, 2006.

Gonzalez, R.V. and Kobliska, J.A. (2006) A light-weight device to measure upper-extremity kinematics. J of Biomechanics (39 / S1) S75; 5th World Congress of Biomechanics, Munich, Germany, Aug, 2006.

Gonzalez, R.V., Vaughan, M., and Ayers, S. (2006) Roll-over characteristics of prosthetic feet used in developing nations. J of Biomechanics (39 / S1) S551;5th World Congress of Biomechanics, Munich, Germany, Aug, 2006.

Ayers, S., Gonzalez, R.V., and Minelga, E (2006) Development of a low-cost, easily manufactured knee technology with improved functionality outcomes for trans-femoral amputees in developing nations. J of Biomechanics (39 / S1) S500;5th World Congress of Biomechanics, Munich, Germany, Aug, 2006.

Leiffer, P.R., Gonzalez, R.V., and Hellmuth, T. (2006) Interdisciplinary design teams – lessons learned by experience. ASEE Annual Conference, Chicago, IL, June, 2006.

Vaughan, M., and Gonzalez, R.V. (2006) Roll-over shapes of prosthetic feet commonly used in developing nations. 23rd Annual Houston Conference on Biomedical Engineering Research, Houston, TX, Feb, 2006.

Kobliska, J.A., Nielson, J.O., and Gonzalez, R.V. (2006) Direct measurement of upper-extremity kinematics via a lightweight device.  23rd Annual Houston Conference on Biomedical Engineering Research, Houston, TX, Feb, 2006.

Shull, P.B. and Gonzalez, R.V. (2005) Bimanual motor control: biological and robotic system learning via simultaneous movement requirements. 20th Congress of the International Society of Biomechanics, Cleveland, OH, Aug, 2005.

Green, M.G., Gonzalez, R.V., Wood, K.L., (2005) “Engineering Research Applied to Third World Needs: Case Studies of Applied and Fundamental Work,” Contributed Talk, 60th Annual American Scientific Affiliation Conference, Grantham, PA, August 2005.

Leiffer, P.R., Graff, R.W., and Gonzalez, R.V. (2005) Five Curriculum Tools to Enhance Interdisciplinary Teamwork. ASEE Annual Conference, Portland, OR, June, 2005.

Ness, K.M., and Gonzalez, R.V. (2005) Engineering design of lower extremity prosthetic for high ambulation patients in developing nations. 22nd Annual Houston Conference on Biomedical Engineering Research, Houston, TX, Feb, 2005.

Shull, P.B., and Gonzalez, R.V. (2005) A haptic robotic assessment device to study human learning and adaptation. 22nd Annual Houston Conference on Biomedical Engineering Research, Houston, TX, Feb, 2005. Best Presentation in Biorobotics

Hunt, B.V. and Gonzalez, R.V. (2004) Using musculoskeletal properties to develop a “normalized potential moment contribution index” for individual arm muscles. ASME National Congress, Anaheim, CA, Nov, 2004.

Gonzalez, R.V., Leiffer, P.R., and Lopez, J. (2004) Is a successful research laboratory possible with under-graduates alone? ASEE Annual Conference, Salt Lake City, Utah, June, 2004. Nominated for Best Paper

Leiffer, P.R., and Gonzalez, R.V. (2004) Development of a BSE concentration in Biomedical Engineering. ASEE Annual Conference, Salt Lake City, Utah, June, 2004.

Hunt, B.V. and Gonzalez, R.V. (2004) Moment arm verification of a computational musculoskeletal arm model. 21st Annual Houston Conference on Biomedical Engineering Research, Houston, TX, Feb, 2004.

Ness, K., Martin, P. and Gonzalez, R.V. (2004a) Using Motion analysis and EMG to assess arm motion. 21st Annual Houston Conference on Biomedical Engineering Research, Houston, TX, Feb, 2004.

Plymale, S. and Gonzalez, R.V. (2004) Fuzzy control of an intelligent prosthetic arm at the elbow joint complex. 21st Annual Houston Conference on Biomedical Engineering Research, Houston, TX, Feb, 2004.

Webb, J.D. and Gonzalez, R.V. (2003) A Three Dimensional Forward Dynamic Model of a Human Knee for Determining Ligament Forces. ASME National Congress, Washington, DC, Nov, 2003.

Gardinier, J., and Gonzalez, R.V. (2003) Pronation-Supination Moment Arms in the Human Forearm.  ASME Summer Bioengng Conf, Key Biscayne, FL, June, 2003.

Kirkendall, A.L., Lopez, J.M., and Gonzalez, R.V. (2002) A kinematic analysis of an ACL deficient knee. ASME National Congress, New Orleans, LA, Nov, 2002. 1st Place Undergraduate Student Paper Award

Gonzalez, R.V. and Leiffer, P.R. (2002) Undergraduate education-research with biomedical engineering laboratories. ASEE Annual Conference, Montreal, CANADA, June, 2002.

Leiffer, P.R., and Gonzalez, R.V. (2002) Development of modules and labs for “Biomedical engineering across the curriculum.” ASEE Annual Conference, Montreal, CANADA, June, 2002.

Gonzalez, R.V. (2001) BME Undergraduate design projects using various engineering majors. ASEE Annual Conference, Albuquerque, NM, June, 2001.

Buchanan TS, Manal K, Shen X, Lloyd DG, and Gonzalez RV (2000): The virtual arm: estimating joint moments using an EMG-driven model. Proc Europ Soc Biomech 12: 93.

Rask, J.M.R., Gonzalez, R.V., and Buchanan, T.S. (1999) Servo-motor control of human arm kinematics in virtual reality modeling. ASME Summer Bioengng Conf, Big Sky, MT, June, 1999.

Buchanan TS, Cheng J-Y, Shen X, Gonzalez RV, and Manal K (1999) The virtual arm: a biologically-driven musculoskeletal model of the upper extremity. ASME Summer Bioengng Conf. Big Sky, MT, June, 1999.

Gonzalez, R.V. (1999) Active learning: using students within the lecture process. ASEE Gulf Southwest Conference, Dallas, TX, March, 1999.

Gonzalez, R.V., and Peterson, E. (1999) Biomedical research projects in senior design. ASEE Gulf Southwest Conference, Dallas, TX, March, 1999.

Gonzalez, R.V., Barr, R.E., and Abraham, L.D. (1998) A method for driving a dynamic musculoskeletal model using processed electromyographic data. 17th Southern Biomedical Engrg Conf, San Antonio, TX, Feb, 1998.

Gonzalez, R.V., and Lee, C. (1998) Smart material as artificial muscles: A quantitative performance study of polyacrylonitrile fibers. 17th Southern Biomedical Engrg Conf, San Antonio, TX, Feb, 1998.

Gonzalez, R.V., and Thielman, J.L. (1998) Development of a physical model of the human elbow joint using polyacrylonitrile fibers. SPIE’s 5th Intl Symp on Smart Structures and Mats, San Diego, CA, March, 1998.

Gonzalez, R.V., and Lee, C. (1998) A quantitative force comparison of polyacrylonitrile fibers with skeletal muscle. SPIE’s 5th Intl Symp on Smart Structures and Mats, San Diego, CA, March, 1998.

Besier, T.F., Lloyd, D.G., Buchanan, T.S., and Gonzalez, R.V. (1998) Development of an EMG-driven musculoskeletal model to estimate human joint moments. Proc. 2nd Australian Biomechanics Conference, Auckland, New Zealand, January, 1998.

Nieuwenhuis MK, Gonzalez RV, van der Net J, Kuis W, Buchanan TS, Helders PJM. (1997) Role of the forearm muscles related to wrist malalignment in juvenile chronic arthritis. Proceedings Pediatric Physiotherapy, 72-73.

Gonzalez, R., Bock H., Collison G., Lee C., Smokowicz C., Thielman J. (1997) Artificial muscles across the human elbow: A performance study of polyacrylonitrile fibers. American Society of Biomechanics, Clemson, SC, September, 1997.

Buchanan, T.S., Lloyd, D.G., Besier, T., and Gonzalez, R.V. (1997) Development of EMG-driven musculoskeletal models for estimation of human joint moments. Int Soc Biomech, 16:330, 1997.

Lloyd, D.G., Gonzalez, R.V., and Buchanan, T.S. (1996) A general EMG-driven musculoskeletal model for prediction of human joint moments. Australian Conf of Science and Medicine in Sport, Canberra, Australia, 236-237

Buchanan, T.S., Gonzalez, R.V., and Lloyd, D.G. (1996) Development of EMG-driven musculoskeletal models for estimation of human joint torques. Proc IEEE Engng Med Biol 18, 1996.

Gonzalez, R.V., Nieuwenhuis, M.K., Helders, P.J.M., and Buchanan, T.S. (1996) Estimated effects of carpal malalignment in juvenile rheumatoid arthritis on wrist joint moments. American Society of Biomechanics, Atlanta, GA, October 1996. Vol. 20:161-162.

Gonzalez, R.V., Abraham, L.D., Barr, R.E., and Buchanan, T.S. (1995) Muscle coordination in elbow joint complex movements. American Society of Biomechanics, Stanford, CA, August 1995.

Gonzalez, R.V., Delp, S.L., Grierson, A.E., and Buchanan, T.S. (1995) Interplay of musculoskeletal geometry and muscle architecture in the human wrist. American Society of Biomechanics, Stanford, CA, August 1995.

Roberson, D.J., Barr, R.E., and Gonzalez, R.V. (1994) Preconditioning electromyographic data for an upper extremity model using neural networks. Proc. of the 1994 IEEE Inter. Conf. on Sys., Man, and Cyber., San Antonio, TX, Oct. 1994. pp. 969-974

Gonzalez, R.V., Barr, R.E., and Abraham, L.D. (1994) A musculoskeletal model of the elbow joint complex. ASME Winter Annual Mtg , Chicago, IL.

Lester, W.T., Fernández, B., Gonzalez, R.V., and Barr, R.E. (1994) A neural network approach to electromyographic signal processing for a motor control task. ASME American Control Conference, Baltimore, MD.

Gonzalez, R.V., Micallef, D.M., Barr, R.E., and Abraham, L.D. (1991) Prediction of muscle force patterns in elbow flexion / extension using mathematical modeling and electromyography. Proc. of the 10th Southern Biomedical Eng. Conf.,  Atlanta, Georgia, October 1991.

Wood, S.M., Barr, R.E., Abraham, L.D., and Gonzalez, R.V. (1990) Computer graphics modeling of the musculoskeletal system of the human arm. Proc. of the 12th Ann. Conf. of the IEEE Engineering in Med. and Biol. Soc.,  Philadelphia, PA, November 1990.

Undergraduate & Advisor Conference Presentations and Posters

Gonzalez, R.V. and Kobliska, J.A. (2006) A light-weight device to measure upper-extremity kinematics. ASME Student Regional Conference, Fayetteville, AR, Mar, 2006.

Vaughan, M., and Gonzalez, R.V. (2006) Roll-over Shapes: Common Prosthetic Feet used in Developing Countries and Their Roll-over shapes. ASME Student Regional Conference, Fayetteville, AR, Mar, 2006.

Ness, K., and Gonzalez, R.V. (2005) Engineering Design of Lower Extremity Prosthetic for High Ambulation Patients in Developing Nations. ASME Student Regional Conference, Lubbock, TX, Mar, 2005. 2nd Place Presentation

Minelga, E., and Gonzalez, R.V. (2005) Prosthesis design for developing nations. ASME Student Regional Conference, Lubbock, TX, Mar, 2005. 1st Place Poster

Plymale, S., and Gonzalez, R.V. (2004) An EMG-Driven Fuzzy Logic Controller of a Mechanical Arm. ASME National Congress, Anaheim, CA, Nov, 2004. 1st Place Presentation – National Award

Plymale, S., and Gonzalez, R.V. (2004) An EMG-Driven Fuzzy Logic Controller of a Mechanical Arm. ASME Student Regional Conference, Longview, TX, March, 2004. 1st Place Presentation & Best Technical

Ness, K., and Gonzalez, R.V. (2004) Intelligent Prosthetic Arm: Quantifying Arm Movement. ASME Student Regional Conference, Longview, TX, March, 2004.

Matthews, M., and Gonzalez, R.V. (2004) Neuromuscular Adaptation of Human Arm Movements. ASME Student Regional Conference, Longview, TX, March, 2004. 2nd Place Poster

Bassett, D., and Gonzalez, R.V. (2003) Robotic Validation of a Computational Knee Model. ASME National Congress, Washington DC, Nov, 2003.

Bassett, D., and Gonzalez, R.V. (2003) Robotic Validation of a Computational Knee Model. ASME Student Regional Conference, Houston, TX, March, 2003. 1st Place Presentation & Best Technical

Lockhart, D., Downing, E., and Gonzalez, R.V. (2003) Three Dimensional Model for Determining Ligament Forces. ASME Student Regional Conference, Houston, TX, March, 2003.

Webb, J., Cooper, J., and Gonzalez, R.V. (2003) Utilizing Robotic Manipulation in Cadaver Biomechanical Research. ASME Student Regional Conference, Houston, TX, March, 2003

Kirkendall, A.L., and Gonzalez, R.V. (2002) A kinematic analysis of an ACL deficient knee. ASME Student Regional Conference, Kingsville, TX, March, 2002. 1st Place Presentation & Best Technical

Lopez, J.M., Kirkendall, A.L., and Gonzalez, R.V. (2002) A kinematic analysis of an ACL deficient knee. ASME Student Regional Conference, Kingsville, TX, March, 2002. 1st Place Poster

Slager, J, and Gonzalez, R.V. (2001) Next Generation Prosthetic. ASME National Congress, New York, NY, Nov, 2001.

Slager, J, and Gonzalez, R.V. (2001) Next Generation Prosthetic. ASME Student Regional Conference, Tulsa, OK, March 2001. 1st Place Presentation & Best Technical

Johnston, J., and Gonzalez, R.V. (2001) Neuromuscular-Based Control of a Prosthetic Limb. ASME Student Regional Conference, Tulsa, OK, March 2001.

Jeffers, J., and Gonzalez, R.V. (2001) Analysis of Muscular Activation in the Human Arm During Static and Dynamic Exertion. ASME Student Regional Conference, Tulsa, OK, March 2001.

Hvass, P, and Gonzalez, R.V. (2000) The intelligent prosthetic arm. ASME National Congress, Orlando, FL, Nov, 2000.

Hvass, P, and Gonzalez, R.V. (2000) The intelligent prosthetic arm. ASME Student Regional Conference, Lafayette, LA, March 2000. 1st Place Presentation & Best Technical

Brodine, M, and Gonzalez, R.V. (2000) Modeling neuromuscular control in a pneumatic prosthetic limb. ASME Student Regional Conference, Lafayette, LA, March 2000.

Trammell, M, and Gonzalez, R.V. (2000) Analysis of Pneumatic Muscles for Prosthetic Limb Movement. ASME Student Regional Conference, Lafayette, LA, March 2000.

Rask, M. and Gonzalez, R.V. (1999) The virtual human arm. ASME National Congress, Nashville, TN, Nov, 1999.

Rask, M. and Gonzalez, R.V. (1999) The virtual human arm. ASME Student Regional Conference, Fayetteville, AR, March 1999. 1st Place Presentation & Best Technical

Edmunds, J. and Gonzalez, R.V. (1999) The virtual human arm: optimal control’s role in determining muscle parameters. ASME Student Regional Conference, Fayetteville, AR, March 1999.

Mondy, A. and Gonzalez, R.V. (1999) Servo-motor control of human arm kinematics in virtual reality modeling. ASME Student Regional Conference, Fayetteville, AR, March 1999.

Warren, S. and Gonzalez, R.V. (1998) Fuzzy PD control with simulated proprioceptive feedback of disproportionately loaded artificial muscle actuators in a dual revolute system. ASME Student Regional Conference, College Station, TX, April 1998. 1st Place Presentation & Best Technical

Culver, A. and Gonzalez, R.V. (1998) Mechanical characterization of polyacrylonitrile fibers: comparison with human muscle performance. ASME Student Regional Conference, College Station, TX, April 1998.

Morrison, I. and Gonzalez, R.V. (1998) Dynamic control of artificial muscles across two human elbow joints. ASME Student Regional Conference, College Station, TX, April 1998.

Thielman, J. and Gonzalez, R.V. (1997) Physical model of human elbow joint using PAN fiber artificial muscles. ASME Student Regional Conference, Dallas, TX, April 1997. 2nd Place Presentation & Best Technical

Lee, C. and Gonzalez, R.V. (1997) Artificial muscles across the human elbow. ASME Student Regional Conference, Dallas, TX, April 1997.

 

Roger V. Gonzalez - Education

·         Post-Doctoral Fellow: Depts of Physiology and Rehabilitation Medicine, Northwestern University Medical School

·         Post-Doctoral Fellow: Sensory Motor Performance Program, Rehabilitation Institute of Chicago

·         Ph.D. in Mechanical Engineering: December, 1994
The University of Texas at Austin
Dissertation: A Computational Musculoskeletal Model of the Human Elbow and Forearm in the Analysis of Ballistic Movements

·         M.S. in Engineering (Biomedical): December, 1990
The University of Texas at Austin
Thesis: Prediction of Muscle Force Patterns in Elbow Flexion/Extension and Comparison With Electromyography

·         Manufacturing Engineering-Management Professional Corporate Program: June, 1988
General Electric Company

·         B.S. in Mechanical Engineering: May, 1986
The University of Texas at El Paso (UTEP)

 

Roger V. Gonzalez - Experience

Registered Professional Engineer in the State of Texas

·         Professor in Biomedical and Mechanical Engineering, 8/05 – Present

·         Associate Professor in Mechanical Engineering, 8/01 – 7/05
Assistant Professor
in Mechanical Engineering, 8/96 - 7/01
School of Engineering and Engineering Technology
LeTourneau University, Longview, TX, 75601

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