Publications, Conferences, Reports, Manuals
2020 – Present
Meng, C. R., Walts, C. T., Ryan, L. J., Stearne, D. J., & Clark, K. P. (2024). Spatiotemporal kinematics during top speed sprinting in male intercollegiate track and field and team sport athletes. Sports Biomechanics, 1–14
Alt T., Komnik, I., Ryan, L.J., & Clark, K.P. (2024). Top speed sprinting: Thigh angular motion and eccentric hamstring strength in faster vs. slower sprinters. Human Movement Science, Volume 98/2024
Clark, K. P., Ryan, L. J., Meng, C. R., & Stearne, D. J. (2023). Determination of Total Thigh Range of Motion during Top Speed Sprinting. In American Society of Biomechanics East Coast Spring 2023 Meeting: Conference Proceedings (Reading, PA, April 28-29, 2023)
Clark, K. P., Ryan, L. J., Meng, C. R., & Stearne, D. J. (2023). Horizontal Foot Speed During Submaximal and Maximal Running. Journal of Human Kinetics, Volume 87/2023
Clark, K. P., & Ryan, L. J. (2022). Hip Torque is a Mechanistic Link Between Sprint Acceleration and Maximum Velocity Performance: A Theoretical Perspective. Frontiers in Sports and Active Living, 4 (2022)
Clark, K. P., Ryan, L. J., Meng, C. R., & Stearne, D. J. (2021). Evaluation of maximum thigh angular acceleration during the swing phase of steady-speed running. Sports Biomechanics, 1-14
Reichow, A., Ryan, L. J., Stokes, M., Bell, K. R., & Purkayastha, S. (2021). Baroreflex Sensitivity is Impaired in Athletes Following a Sports-Related Concussion. In International Journal of Exercise Science: Conference Proceedings (Vol. 2, No. 13, p. 63).
2010-2019
Purkayastha, S., Adair, H., Woodruff, A., Ryan, L. J., Williams, B., James, E., & Bell, K. R. (2019). Balance Testing Following Concussion: Postural Sway versus Complexity Index. PM&R, 11(11), 1184-1192.
Brown, E. K., Lyng, S. H., Ryan, L. J., Bell, M. D., Kathleen, R., & Purkayastha, S. (2019). Despite Symptom Resolution Dynamic Cerebral Autoregulation is Impaired in Collegiate Athletes Following Concussion. In International Journal of Exercise Science: Conference Proceedings (Vol. 2, No. 11, p. 59).
Brooks, L., Clark, K., Ryan, L., & Weyand, P. (2019). Mechanical Constraints of Force Production during a Stationary Sprint-Start. In International Journal of Exercise Science: Conference Proceedings (Vol. 9, No. 7, p. 12).
Udofa, A. B., Clark, K. P., Ryan, L. J., & Weyand, P. G. (2019). Running ground reaction forces across footwear conditions are predicted from the motion of two body mass components. Journal of Applied Physiology, 126(5), 1315-1325.
Frantz, J., Sedaghat, S., Ryan, L., Wainman, M., Lyng, S., Sabo, T., Bell, K. and Purkayastha, S. (2018). Dynamic Cerebral Autoregulation Impairment Persists Past Resolution of Symptoms in Collegiate Athletes Following Concussion. The FASEB Journal, 32(1_supplement), 920-3.
Purkayastha, S., Frantz, J., Sedaghat, S., Ryan, L., Lyng, S., Wainman, M., Sabo, T. and Bell, K. (2018, May). Dynamic Cerebral Autoregulation Impairment at Rest and During Physical Stress Persists Despite Symptom Resolution in Collegiate Athletes Following Concussion. In Journal of Head Trauma Rehabilitation (Vol. 33, No. 3, pp. E91-E91).
Woodruff, A., Frantz, J. M., Ryan, L. J., Davis, P. F., & Purkayastha, S. (2018). Impairment of Physiological Complexity of Postural Control Persists Beyond Resolution of Postural Sway Following Concussion. In International Journal of Exercise Science: Conference Proceedings (Vol. 2, No. 10, p. 72).
Clark, K. P., Udofa, A. B., Ryan, L. J., & Weyand, P. G. (2018). Running impact forces: from half a leg to holistic understanding-comment on Nigg et al. Current Issues in Sport Science (CISS).
Clark, K. P., Ryan, L. J., & Weyand, P. G. (2017). A general relationship links gait mechanics and running ground reaction forces. Journal of Experimental Biology, 220(2), 247-258.
Winkelman, N. C., Clark, K. P., & Ryan, L. J. (2017). Experience level influences the effect of attentional focus on sprint performance. Human Movement Science, 52, 84-95.
Udofa, A., Ryan, L., Clark, K., & Weyand, P. (2017). Ground Reaction Forces During Competitive Track Events: A Motion Based Assessment Method. ISBS Proceedings Archive, 35(1), 120.
Maffuid, K., Ryan, L., Murphy, M. N., Davis, P. F., & Purkayastha, S. (2016). Improvement in Cerebral Autoregulation During Recovery Phase Following Concussion is Associated With Reduced Postural Sway: A Pilot Study. The FASEB Journal, 30(1 Supplement), 990-1.
Udofa, A. B., Ryan, L. J., & Weyand, P. G. (2016). Impact forces during running: Loaded questions, sensible outcomes. In Wearable and Implantable Body Sensor Networks (BSN), 2016 IEEE 13th International Conference (pp. 371-376). IEEE.
Bundle, M. W., Powell, M. O., & Ryan, L. J. (2015). Design and testing of a high-speed treadmill to measure ground reaction forces at the limit of human gait. Medical Engineering & Physics, 37(9), 892-897.
Clark, K. P., Ryan, L. J., & Weyand, P. G. (2014). Foot speed, foot-strike and footwear: linking gait mechanics and running ground reaction forces. Journal of Experimental Biology, 217(12), 2037-2040.
Weyand, P. G., Clark, K. P. & Ryan, L. J. (2013). System and method for predicting a force applied to a surface by a body during a movement. U.S. Patent 9,110,089 B2.
Clark, K. P., Ryan, L. J., & Weyand, P. G. (2013). Human Sprint Running Mechanics: Do Right and Left Legs Apply Equal Ground Forces? In International Journal of Exercise Science: Conference Proceedings (Vol. 2, No. 5, p. 15).
Wohlers, L. M., Clark, K. P., Ryan, L. J., & Weyand, P. G. (2013). High on grass? Influence of terrain on human walking economy. In International Journal of Exercise Science: Conference Proceedings (Vol. 2, No. 5, p. 18).
Clark, K. P., Ryan, L. J., & Weyand, P. G. (2012). Do Horizontal Forces Matter For Horizontal Running? In International Journal of Exercise Science: Conference Proceedings (Vol. 2, No. 4, p. 4).
Kinetics and Kinematics Analysis Procedures, Technical Documentation Package, SMU Physiology Department, Jun-2012.
High-speed Motion Capture System, Technical Documentation Package, SMU Physiology Department, Jan-2012.
Force Treadmill System, Control System, Technical Documentation Package, SMU Physiology Department, Jun-2010.
2000-2009
Ryan, L. J., Slocum, R. E., & Steves, R. B. (2004). Miniature Vector Laser Magnetometer Measurements of Earth’s Field. In ESTO.NASA.GOV.
Earth’s Field Measurements Using the Miniature Vector Laser Magnetometer, ESTC-2004, Earth Science Technology Conference, Jun-2004.
Miniature Vector Laser Magnetometer, Year 2 Annual Report, NASA, National Aeronautics and Space Administration, #NAS5-01223, Feb-2004.
Advanced Laser Magnetic Detection Systems for Undersea and Battlefield Applications, MSS-2003, Military Sensing Symposia for Battlefield Sensors, Oct-2003.
Design and Operation of the Miniature Vector Laser Magnetometer, ESTC-2003, Earth Science Technology Conference, Jun-2003.
Miniature Vector Laser Magnetometer, Year 1 Annual Report, NASA, National Aeronautics and Space Administration, #NAS5-01223, Feb-2003.
Helium Triaxial Gradiometer, Phase II Final Report, NAVSEA, Naval Sea Systems Command, #N00024-99-C-4063, Jan-2003.
ASQ-208 U.S. Navy Magnetometer Evaluation System, Test Procedure, Polatomic / Office of Naval Research, 2002.
Slocum, R. E., Kuhlman, G., Ryan, L., & King, D. (2002, October). Polatomic advances in magnetic detection. In OCEANS ’02 MTS/IEEE (Vol. 2, pp. 945-951). IEEE.
Self-Calibrating Vector Magnetometer for Space, ESTC-2002, Earth Science Technology Conference, Jun-2002.
UAV Laser MAD System, Phase II Final Report, NAVAIR, Naval Air Systems Command, #NOO421-00-C-0296, Jan-2002.
INSIDE Jupiter Magnetometer Concept Study, JPL, Jet Propulsion Laboratory, Jul-2001.
Vector/Scalar Magnetometer, Phase II Final Report, NSF, National Science Foundation, #DMI-9633485, Nov-2000.
Miniature Laser-Pumped Magnetometer, Year 2 Final Report, JPL, Jet Propulsion Laboratory, #1209063, Mar-2000.
Helium Triaxial Gradiometer, Phase I Final Report, NAVSEA, Naval Sea Systems Command, #N00024-99-C-4029, (Oct-1999) – Jan-2000.
1990-1999
TO-92 Octal Handler, Controls Package PLC Direct 405, Internal Technical Publication, Dallas Automation, 1998.
TO-18 Handler, Controls Package PLC Direct 205, Internal Technical Publication, Dallas Automation, 1998.
AirBorn Smart Card Reader Test Machine, Controls Package PLC Direct 205, Internal Technical Publication, Dallas Automation, 1998.
Takata NAPI Integration, Controls Package Allen-Bradley PLC-5/80E SLC-5/04, Technical Manual, Automation Resources / Takata, 1997.
Sanden Pump Test Machine, Controls Package Allen-Bradley SLC-5/04 with PanelView 900, Technical Manual, Automation Resources / Sanden International, 1996.
Takata Barcode Data Acquisition System, Controls Package Allen-Bradley PLC-5/40E, Technical Manual, Automation Resources / Takata, 1996.
Sanden Shim Select Machine, Controls Package Allen-Bradley SLC-5/04 with PanelView 900, Technical Manual, Automation Resources / Sanden International, 1996.
Morton-Thiokol High-speed Conveyor, Hardware Relay Logic Control System, Technical Manual, Automation Resources / Morton-Thiokol, 1996.
ACCS Cable Assembly Machine, Controls Package Allen-Bradley PLC-5/40 with WinView, Technical Manual, Automation Resources / Abbott Critical Care Systems, 1996.
Martin Marietta Torque Machine, Explosion Proof Controls Package Allen-Bradley SLC-5/03, Technical Manual, Automation Resources / Martin Marietta, 1996.
Siecor Fiber-optic Assembly Machine, Controls Package Allen-Bradley SLC-5/03, Technical Manual, Automation Resources / Siecor International, 1995.
Transitions Optical Spin Coat Machine, Controls Package Allen-Bradley PLC-5/40, Technical Manual, Automation Resources / Transitions Optical, 1995.
Morton-Thiokol Conveyor Tracker, Explosion Proof Controls Package, Technical Manual, Automation Resources / Morton-Thiokol, 1994.
Olin Ordnance Leak Tester Machine, Explosion Proof Controls Package Allen-Bradley SLC-5/01, Technical Manual, Automation Resources / Olin Ordnance, 1994.
Olin Ordnance Unpacker Machine, Explosion Proof Controls Package Allen-Bradley SLC-5/01, Technical Manual, Automation Resources / Olin Ordnance, 1994.
Olin Ordnance Shell Assembly Machine, Explosion Proof Controls Package Allen-Bradley PLC-5/40, Technical Manual, Automation Resources / Olin Ordnance, 1994.
ACCS Wing Bond Machine, Controls Package Allen-Bradley SLC-5/01, Technical Manual, Automation Resources / Abbott Critical Care Systems, 1994.
ACCS Ampliflex Machine, Controls Package Allen-Bradley SLC-5/01, Technical Manual, Automation Resources / Abbott Critical Care Systems, 1994.
Martin Sprocket Drilling Machine, Controls Package Allen-Bradley SLC-5/01, Technical Manual, Automation Resources / Martin Sprocket, 1994.
ACCS Manifold Machine, Controls Package Allen-Bradley SLC-5/03, Technical Manual, Automation Resources / Abbott Critical Care Systems, 1994.
Printing Press Control System, Controls Package Allen-Bradley PLC-5/20 with PanelView, Technical Manual, Automation Resources / Press Controls Services, 1994.
TRW Wire Wrap Machines, Controls Package Allen-Bradley PLC-5/20, Technical Manual, Automation Resources / TRW, 1993.
Whirlpool Robotic Assembly Line, Controls Package Allen-Bradley PLC-5/40, Technical Manual, Automation Resources / Whirlpool, 1993.
Gas Turbine Flame Safety System, Forney International, Internal Technical Publication, 1993.
Forney IDD/UV-4 Flame Detector, Forney International, Internal Technical Publication, 1992.
1988-1989
Flex-52 Controller for Semiconductor Material Handling Equipment. Flextek, Internal Technical Publication, 1989.
Ryan, L. J., Rayburn, L. A., & Cunningham, A. J. (1989). Measurements of oscillator strengths for EUV emissions of ionized oxygen, nitrogen and sulfur. Journal of Quantitative Spectroscopy and Radiative Transfer, 42(4), 295-302.
Ryan, L. J., Beam-Foil Measurements of Oscillator Strengths for EUV Emissions of Nitrogen, Oxygen, and Sulfur Ions, Dissertation, University of Texas at Dallas, 1988.