Instruction: Physics and applied physics

 Research: Physics and aerodynamics of parachutes

 Research: Biomechanics of swimming vertebrates

    Department of Physics, Shannon Hall Rm 111,

    Saint Louis University,

    3511 Laclede Ave.

    St. Louis, MO 63103, USA.

        potvinj@slu.edu 

Education - Ratings - Professional Service

• B. Sc. in Physics, 1978, Universite Laval , Quebec City, Canada

• M. Sc. in Physics, 1980, Universite Laval, Quebec City, Canada

• Ph. D. in Physics, 1985, University of Colorado-Boulder

• FAA Senior Parachute Rigger (since 1999)

• USPA Parachute Jumpmaster and Instructor (S/L) 1994 - 2001

• Test and sport parachutist with over 2600 jumps

• Co-founder, with Mr. Gary Peek , of the Parks College Parachute Research Group (www.pcprg.com)

• Course Director, H. G. Heinrich Parachute Systems Short Course , since 2001

• Member, AIAA Aerodynamic Decelerator Systems Technical Committee, since 1995; Chair (2013 - 2015)

• Member, American Institute for Aeronautics and Astronautics (AIAA), since 1995

• Member, Society for Integrative and Comparative Biology (SICB), since 2010.

Honors and Awards 

• Associate Fellow, American Institute for Aeronautics and Astronautics (AIAA), January 2009

Teaching Experience at Saint Louis University

• Unsteady Aerodynamics (graduate level)

• Parachute Systems & Design (graduate level)

  • Bio-mechanics for zoology

  • Introductory College Physics I and II (100-level)- with or without calculus

  • Modern Physics

  • Introduction to Astronomy

• Stellar Structure and Evolution

• Instruments for Astrophysics and Cosmology

  • Optics (wave optics and laser physics)

  • Calculus I

  • Introduction to Weather (while at Parks College in Cahokia IL)

• Physical Processes in the Atmosphere (while at Parks - Cahokia)

Research Interests

• Basic physics: Nature of the force of drag during decelerating and accelerating motions.

• Fluid mechanics: Interaction between fluids and limp structures such as fabric materials.

• Physical zoology: hydrodynamics and physics of whale lunge feeding

• Physical zoology: CFD modeling of the hydrodynamics toothed and baleen whales (non-feeding motion) 

• Aerodynamics: Inflation and flight of parachutes.

• Engineering: Design and testing new parachutes for cargo airdrop, government jumpers and sport skydivers.

• Test parachuting - Check out the movie at the bottom of this page

Publications, 1980 to 1995: Elementary particles and high energy physics

• • Available on request

Publications from 2009 to present: Comparative Biomechanics (Copies available on https://www.researchgate.net/profile/Jean_Potvin )

• Werth, A.J., and Potvin, J., (2024) "Dynamic filtration in baleen whales: Recent discoveries and emerging trends". Frontier in Marine Science, 11, p.1347497. https://doi.org/10.3389/fmars.2024.1347497 

• Potvin, J., and Werth, A.J., (2024) "Suffused: Baleen Fringe Mat Porosity and Hydrodynamics in Balaenid and Balaenopterid Whales". Biological Journal of the Linnean Society. https://doi.org/10.1093/biolinnean/blae030 

• Werth, A.J., Kahane-Rapport, S.R., Potvin, J., Goldbogen, J.A., and Savoca, M.S., (2024) "Baleen-plastic interactions reveal high risk to all filter-feeding whales from clogging, ingestion, and entanglement." Oceans, Vol. 5, pp. 48–70. https://doi.org/10.3390/oceans5010004  

• William T Gough, Dave E Cade, Max F Czapanskiy, Jean Potvin, Frank E Fish, Shirel R Kahane-Rapport, Matt S Savoca, K C Bierlich, Dave W Johnston, Ari S Friedlaender, Andy Szabo, Lars Bejder, Jeremy A Goldbogen, "Fast and Furious: Energetic Tradeoffs and Scaling of High-Speed Foraging in Rorqual Whales", Integrative Organismal Biology, 2022, obac038, https://doi.org/10.1093/iob/obac038 

• Segre, P.S., Gough, W.T., Roualdes, E.A., Cade, D.E., Czapanskiy, M.F., Fahlbusch, J., Kahane-Rapport, S.R., Oestreich, W.K., Bejder, L., Bierlich, K.C. Burrows, J.A., ...Potvin J.....Goldbogen, J.A.. (2022). Scaling of maneuvering performance in baleen whales: larger whales outperform expectations. Journal of Experimental Biology, 225(5), https://doi.org/10.1242/jeb.243224   . 

• William T. Gough, Hayden J. Smith, Matthew S. Savoca, Max F. Czapanskiy, Frank E. Fish, Jean Potvin, K. C. Bierlich, David E. Cade, Jacopo Di Clemente, John Kennedy, Paolo Segre, Andrew Stanworth, Caroline Weir, Jeremy A. Goldbogen; "Scaling of oscillatory kinematics and Froude efficiency in baleen whales".  Journal of Experimental Biology 1 July 2021; 224 (13): jeb237586. doi: https://doi.org/10.1242/jeb.237586

• Potvin, J., Cade, D.E., Werth, A.J., Shadwick, R.E. and Goldbogen, J.A., (2021). "Rorqual Lunge-Feeding Energetics Near and Away from the Kinematic Threshold of Optimal Efficiency". Integrative Organismal Biology, 3(1), pp. 1-18.  https://doi.org/10.1093/iob/obab005 .

• Potvin, J., Cade, D.E., Werth, A.J., Shadwick, R.E. and Goldbogen, J.A., (2020). A perfectly inelastic collision: Bulk prey engulfment by baleen whales and dynamical implications for the world's largest cetaceans. American Journal of Physics, 88(10), pp.851-863. https://doi.org/10.1119/10.0001771 

• Cade, D.E., Carey, N., Domenici, P., Potvin, J. and Goldbogen, J.A., 2020. Predator-informed looming stimulus experiments reveal how large filter feeding whales capture highly maneuverable forage fish. Proceedings of the National Academy of Sciences, 117(1), pp.472-478. doi.org/10.1073/pnas.1911099116

• Segre, P.S., Potvin, J., Cade, D.E., Calambokidis, J., Di Clemente, J., Fish, F.E., Friedlaender, A.S., Gough, W.T., Kahane-Rapport, S.R., Oliveira, C. and Parks, S.E., 2020. Energetic and physical limitations on the breaching performance of large whales. Elife, 9, p.e51760.

• J.A. Goldbogen, D. E. Cade, D. M. Wisniewska, J. Potvin, P.S. Segre, M. S. Savoca, E. L. Hazen, M. F. Czapanskiy, S. R. Kahane-Rapport, S. L. DeRuiter, S. Gero, P. Tønnesen, W. T. Gough, M. B. Hanson, M. Holt, F. H. Jensen, M. Simon, A. K. Stimpert, P. Arranz, D. P. Nowacek, S. Parks, F. Visser, D. Johnson, A. S. Friedlaender, P. L. Tyack, P. T. Madsen, N. D. Pyenson (2019)."Why whales are big but not bigger: physiological drivers and ecological limits in the age of ocean giants". Science. Vol. 366, Issue 6471, pp. 1367-1372. DOI: 10.1126/science.aax9044

• Shadwick, RE, Potvin, J and Goldbogen JA (2019). "Lunge feeding in rorqual whales" Physiology  34: 409 – 418, 2019; doi:10.1152/physiol.00010.2019

• W T Gough, P S Segre, KC Bierlich, D E Cade, J Potvin, F E Fish, J Dale, J di Clemente, A S Friedlaender, D W Johnston, S R Kahane-Rapport, J Kennedy, J H Long, M Oudejans, G Penry, M S Savoca, M Simon, S KA Videsen, F Visser, D N Wiley, and J A Goldbogen  (2019). "Scaling of swimming performance in the largest animals". J. Exp. Biol. Vol. 222. doi: 10.1242/jeb.204172.

• Guilpin. M., V. Lesage, I. McQuinn, J. Goldbogen, J. Potvin, T. Jeanniard-du-Dot, T. Doniol-Valcroze, R. Michaud, M. Moisan & G. Winkler (2019); "Foraging energetics and prey density requirements of western North Atlantic blue whales in the Estuary and Gulf of St. Lawrence, Canada" Marine Ecology Progress Series (MEPS) Vol 625, pp. 205-223. doi:10.3354.meps13043.

• P.S. Segre, D E Cade, J Calambokidis, F E Fish, A S Friedlaender, J Potvin, J A Goldbogen; Body Flexibility Enhances Maneuverability in the World’s Largest Predator, (2018) Integrative and Comparative Biology , icy121, https://doi.org/10.1093/icb/icy121

• Werth, AJ., Potvin, J., Shadwick, RE., Jensen, MA, Cade, DE and Goldbogen JA. (2018) "Filtration area scaling and evolution in mysticetes: trophic niche partitioning and the curious cases of the sei and pygmy right whales ". Biological Journal of the Linnean Society Vol. 125 (2), 264-279 .

• Gleiss, A. C., Potvin, J. and J. M. Goldbogen (2017) "Physical Trade-offs Shape the Evolution of Buoyancy Control in Sharks". Proc. Roy. Soc. B. Vol. 284. No. 1866. The Royal Society, 2017. DOI: 10.1098/rspb.2017.1345. 

• Goldbogen JA, Cade D, Calambokidis, J, Friedleander AS, Potvin J, Segre PS and Werth AJ (2017) "How Baleen Whales Feed: The Biomechanics of Engulfment and Filtration". Ann. Rev. Mar. Sci. (January 2017). Volume 9, 2017  pp 367-386

• Potvin J. and Werth, AJ. (2017). "Oral Cavity Hydrodynamics and Drag Production in Balaenid Whale Suspension Feeding". PLoS ONE. 12(4): e0175220. http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0175220. Interview on BYU Radio's Top of Mind with Julie Rose

• Segre, PS,  Cade, DE,  Fish, FE,   Potvin, J, Allen, AN, Calambokidis,, JA,  Friedlaender, AS, and Goldbogen, JA (2016) "Hydrodynamic properties of fin whale flippers predict maximum rolling performance". J. Exp. Biol.  219: 3315-3320.

• Ware, C., Trites A., Rosen, D. and Potvin J. (2016); "Averaged Propulsive Body Acceleration (APBA) can be Calculated from Biologging Tags that Incorporate Gyroscopes and Accelerometers to Estimate Swimming Speed, Hydrodynamic Drag and Energy Expenditure for Steller Sea Lions". PLoS ONE 11(6): e0157326. doi:10.1371/journal.pone.0157326   http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0157326.

• Werth, AJ., and Potvin J. (2016) "Baleen Hydrodynamics and Morphology of Cross-Flow Filtration in Balaenid Whale Suspension Feeding". PLoS ONE 11(2): e0150106. doi:10.1371/journal.pone.0150106 [Link].

• Goldbogen, J. A., Potvin, J., Fish, F. E. (2015). Hydrodynamics. In “Marine Mammal Physiology: Requisites for Ocean Living”. Editors: Michael Castellini and Jo-Ann Mellish. CRC Press. [Link]

• Goldbogen, JA,  Shadwick, RE ,  Lillie, MA, Piscitelli, MA, Potvin, J ,  Pyenson, ND,  Vogl, AW; "Using morphology to infer physiology: case studies on rorqual whales (Balaenopteridae)" (2015). Canadian Journal of ZoologyVol. 93, pp. 687 - 700.  dx.doi.org/10.1139/cjz-2014-0311.

• Gleiss, A. C., Potvin, J., Keleher, J. J., Whitty, J. M. Goldbogen, J. A., Morgan, D. L. "Mechanical challenges to freshwater residency in sharks and rays". Journal of Experimental Biology (2015) Vol. 218, pp. 1099- 1110; doi: 10.1242/jeb.114868 [Link].

• Robert E. Shadwick, Jeremy A. Goldbogen, Jean Potvin, Nicholas D Pyenson, and Wayne Vogl; "Novel muscle and connective tissue design enables hyper-extensibility and controls engulfment volume in lunge-feeding whales". Journal of Experimental Biology (2013) Vol. 216, pp. 2691- 2701; doi: 10.1242/jeb.081752 [Link].

• J. Potvin, J. A. Goldbogen and R. Shadwick; "Metabolic Expenditures of Lunge Feeding Rorquals Across Scale: Implications for the Evolution of Filter Feeding and the Limits to Maximum Body Size". PLoS ONE (2012) 7(9): e44854. doi:10.1371/journal.pone.0044854.  Online only and open access: http://dx.plos.org/10.1371/journal.pone.0044854 . 

• J. Goldbogen, J. Calambokidis, D. Croll, M. McKenna, E. Oleson, J. Potvin, N. Pyenson, G. Schorr, R.  Shadwick, B. Tershy, "Scaling of lunge feeding performance in rorqual whales: mass-specific energy expenditure increases with body size and progressively limits diving capacity".  Functional Ecology (2012) Vol. 26, pp. 216-226.

• J. Wiedenmann, K.A. Cresswell, J. Goldbogen, J. Potvin and M. Mangel, "Exploring the effects of reductions in krill biomass in the Southern Ocean on blue whales using a state-dependent foraging model". Ecological Modelling (2011) 222, pp. 3366 - 3379. 

• J. A. Goldbogen, J. Calambokidis,  E. Oleson, J. Potvin, N.D. Pyenson, G. Schorr and R.E. Shadwick, "Mechanics, hydrodynamics and energetics of blue whale lunge feeding: efficiency dependence on krill density". Journal of Experimental Biology (2011) 214, pp. 131 - 146; doi.1242/jeb.048157).

• J. Potvin, J. A. Goldbogen and R. Shadwick;  "Scaling of lunge feeding in rorqual whales: an integrated model of engulfment duration". Journal of Theoretical Biology (2010) 267, pp. 437 - 453. (Also published on-line doi:10.1016/j.jtbi.2010.08.026).

• J. A. Goldbogen, J. Potvin and R. Shadwick; "Skull and buccal cavity allometry increase mass-specific engulfment capacity in fin whales". Proc. Roy. Soc B - Biological Sciences. (2010) 277, 861-868. (doi:10.1098/rspb.2009.168). (PDF) (Blog from Discover magazine)

• J. Potvin, J. A. Goldbogen and R. Shadwick "From Parachutes to Whales: Applying the Unsteady Aerodynamics of Inflation to the Study of Lunge Feeding by Whales". Paper AIAA-2009-2954 presented at the 20th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, 4 - 7 May 2009, Seattle, WA.

• J. Potvin, J. A. Goldbogen and R. Shadwick "Passive Versus Active Engulfment: Verdict From Trajectory Simulations of Lunge-Feeding Fin Whales Balaenoptera Physalus". J. Royal Soc. Interface. Vol 6, No. 40, pp. 1005-1025 (2009).  In print on November 6th, 2009. Published online January 20, 2009, doi: 10.1098/?rsif.2008.0492 (PDF copy).

Publications from 1995 to present: Physics & Aerodynamics of Parachutes (Copies may be available on https://www.researchgate.net/profile/Jean_Potvin )

• Benney, RJ, Peek, G, Patel S, and Potvin, J.; "Cruciform Parachute Assembly". Patent Application Publication US 2003/0038215 A1. 2001.

• Potvin, J., and Ray, E.; "Uneven inflation load share trends in clusters". Paper AIAA-2024-4658. Presented at the 27th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, AIAA AVIATION 2024 Conference, Las Vegas, NV, July 30 - August 2, 2024. 

• Potvin, J.; "Simple Rules for Parachute Inflation Testing at the Full- and Under-Scales". Journal of Aircraft (2023) Vol. 60, No. 4, pp. 1094-1104         https://doi.org/10.2514/1.C037103

• Potvin, J.; "Matching the Physics or the Peak Load? Simple Rules for Parachute Inflation Testing at the Full- and Sub-Scales" Paper AIAA-2022-2703. Presented at the 26th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, Toulouse, France, May 15-20, 2022. 

• Potvin, J., and Ray, E.; "Opening Shock Factor Calculation for Orion Main Parachute Disreefing'. Paper AIAA-2019-3486. Presented at the 25th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, Dallas, TX, June 14 - 21, 2019.

• Potvin, J., and Ray, E.; "Extrapolating the Trends of Test Drop Data with Opening Shock Factor Calculations: the Case of the Orion Main and Drogue Parachutes Inflating to 1st Reefed Stage'. Paper AIAA-2017-3228. Presented at the 24th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, Denver, CO, June 4 - 8, 2017.

• McQuilling, M., Reyes, P. and Potvin, J.;"CFD Simulation of a HUMVEE Strapped to a Standard US Army Airdrop Platform". Paper AIAA-2015-2101. Presented at the 23th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, Daytona Beach, FL, March 30 - April 2, 2015.

• McQuilling, M., Reyes, P. and Potvin, J.;"CFD Simulations of a Double Annulus Parachute System for Cargo Airdrop, Using Inflated Shapes Informed by Photogrammetry". Paper AIAA-2015-2169. Presented at the 23th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, Daytona Beach, FL, March 30 - April 2, 2015.

• Potvin, J., and Peek, G.;"Peak Load of a Drogue: Applying the Momentum-Impulse Theorem to Infinite Mass Inflation". Paper AIAA-2015-2181. Presented at the 23th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, Daytona Beach, FL, March 30 - April 2, 2015.

• Potvin, J.,  McQuilling, M., and Kavanaugh, J.; " Geometric Porosity, as a Dynamically Driven Process: Inflation versus Steady Descent". Paper AIAA-2015-2182. Presented at the 23th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, Daytona Beach, FL, March 30 - April 2, 2015.

• Potvin, J., Kavanaugh, J. and McQuilling, M.; "A Second Look at Geometric Porosity, as Revealed by Computational Fluid Dynamics (CFD)". Paper AIAA-2013-1320. Presented at the 22th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, Daytona Beach, FL, March 26-28, 2013.

• N. Freed, McQuilling, M., and Potvin, J.; "Investigation of Outer Ring Aerodynamics of an Annular Parachute". Paper AIAA-2013-1280. Presented at the 22th AIAA AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, Daytona Beach, FL, March 26-28, 2013.

• M. McQuilling, and Potvin, J.; "Forebody Wake Effects on the Aerodynamics of an Annular Parachute". Paper AIAA-2012-3332. Presented at the 21th AIAA Computational Fluid Dynamics Conference, New Orleans, Louisiana, June 24-28, 2012.  

• M. McQuilling, and Potvin, J.; "Effect of the Transient Nature of Flow on Annular Parachute Drag Prediction". Journal of Aircraft, 2012, vol. 49, no. 2, pp. 566-575 .

• M. McQuilling, and Potvin, J.; "Effects of the Transient Nature of Flow on Annular Parachute Drag Prediction". Paper AIAA-2011-3704. Presented at the 20th AIAA Computational Fluid Dynamics Conference, Honolulu, Hawaii, June 27-30, 2011.

• J. Potvin, K. Bergeron, G. Brown, R. Charles, K. Desabrais, H. Johari, V., Kumar,M. McQuilling, A. Morris, G. Noetscher, B. Tutt "The Road Ahead: A White Paper on the Development, Testing and Use of Advanced Numerical Modeling for Aerodynamic Decelerator Systems Design and Analysis". Paper AIAA-2011-2501. Presented at the 21st AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, 23-26 May 2011, Dublin, Ireland.

• J. Potvin and Mc. McQuilling, "The Bi-model: Using CFD in simulations of slowly-inflating low-porosity hemispherical parachutes". Paper AIAA-2011-2542. Presented at the 21st AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, 23-26 May 2011, Dublin, Ireland.

• M. McQuilling, J. Potvin and J. Riley, "Simulating the flows about cargo containers used during parachute airdrop operations". Journal of Aircraft 48, No. 4, pp. 1405-1411, 2011.

• M. McQuilling, J. Potvin and J. Riley, "Simulating the flows about cargo containers used during parachute airdrop operations". Paper AIAA-2010-4565. Presented at the 28th AIAA Applied Aerodynamics Conference. June 28 - July 1, 2010; Chicago IL. 

• "Simple Calculation of Skirt Reefing Line Tension on Low-Porosity Canopies Used at Very Small Reefing ratios". With S. Patel. Paper AIAA-2009-3005 presented at the 20th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, 4 - 7 May 2009, Seattle, WA.

• "Updating and Upgrading the World's Database on the Opening Shock Factor Ck" . Paper AIAA-2009-2905 presented at the 20th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, 4 - 7 May 2009, Seattle, WA.

• "General Mass Capture Model for Swiftly-Opening Parachutes". Journal of Aircraft, 45, No. 5, pp. 1689-1700, 2008.

• "Three-Stage Model for Slider-Reefed Parafoil Inflation"; AIAA paper 2007-2501; with G. Peek; presented at the 19th AIAA Aerodynamic Decelerator Systems Conference and Seminar, Williamsburg, VA, May 21-24, 2007. Download a copy

• "Semi-Numerical Derivation of the Opening Shock Factor and Inflation Time for Slider-Reefed Parafoils"; AIAA paper 2007-2508; with B. Hurst and G. Peek; presented at the 19th AIAA Aerodynamic Decelerator Systems Conference and Seminar, Williamsburg, VA, May 21-24, 2007. Download a copy

• "Testing Without Load Cells - Can Opening Shock Be Estimated From Video Data Only?"; AIAA paper 2007-2551; with G. Peek; presented at the 19th AIAA Aerodynamic Decelerator Systems Conference and Seminar, Williamsburg, VA, May 21-24, 2007. Download a copy , and a copy of the talk

• "Comparative DSSA Study of Payload-Container Dynamics Prior to, During and After Parachute Inflation"; AIAA paper 2007-2564; with R. Charles and K. Desabrais; presented at the 19th AIAA Aerodynamic Decelerator Systems Conference and Seminar, Williamsburg, VA, May 21-24, 2007.

• "Momentum-Impulse Balance and Parachute Inflation: Rocket-Propelled Payloads"; Journal of Aircraft,44, No. 3, pp. 1039-1042, 2007. Download a copy of a talk that summarizes the findings of the Momentum-Impulse series listed below

• "Momentum-Impulse Balance and Parachute Inflation: Fixed-Point Drops "; Journal of Aircraft,44, No. 3, pp. 1026-1029, 2007.

• "Momentum-Impulse Balance and Parachute Inflation: Clusters "; Journal of Aircraft,44, No. 2, pp. 687-691, 2007.

• "Momentum-Impulse Balance and Parachute Inflation: Dis-Reefing"; Journal of Aircraft,44, No. 2, pp. 691-694, 2007.

• "Universality Considerations for Graphing Parachute Opening Shock Factor Versus Mass Ratio "; Journal of Aircraft,44, No. 2, pp. 528 - 538, 2007.

• "A New Inflation Model for Low-Porosity Hemispherical Parachutes: Validation and Implementation in PIMS V3.0"; AIAA paper 2005-1687; with J. Papke, E. Brighton ,M. Farmer and G. Peek; presented at the 18th AIAA Aerodynamic Decelerator Systems Conference and Seminar, Munich, Germany, May 23-26, 2005.

• "Modeling the Interaction of Sub-scale Parachutes With Atmospheric Turbulent Eddies"; with R. Wright;AIAA paper 2005-1675; presented at the 18th AIAA Aerodynamic Decelerator Systems Conference and Seminar, Munich, Germany, May 23-26, 2005.

• "Inflation and Steady-Descent Characteristics of Truncated Cone Decelerators"; with G. E. Peek; AIAA paper 2005-1620; presented at the 18th AIAA Aerodynamic Decelerator Systems Conference and Seminar, Munich, Germany, May 23-26, 2005.

• "Glide Performance Study of Standard and Hybrid Cruciform Parachutes"; with J. Papke, G. Peek, T. Hawthorne, E. Brighton and R. J. Benney; paper AIAA-2003-2160; 17thAIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, Monterey, CA, May 19 -22, 2003; pp. 412 - 429.

• " New Model of Decelerating Bluff Body Drag ", with G. Peek and B. Brocato; Journal of Aircraft,40, No. 2, pp. 370-377, 2003.

• "Accelerating Disk Drag: Theory and Applications"; Paper AIAA-2002-3055; 20th AIAA Applied Aerodynamics Conference, St. Louis, MO, June 24 -26, 2002.

• "Deceleration Dynamics of Unreefed Cruciform and Flat Circular Parachutes During and After Inflation",with G. Peek, B. Brocato, R. Kutz, C. Manglano and B. Yavitz; AIAA Paper 2001, AIAA-2001-2028.

• "Inflation and Glide Studies of Slider-reefed Cruciform Parachutes"; with G. Peek, B. Brocato, T. Perschbacher, R. Kutz and R. Benney; AIAA Paper, AIAA-2001-2021.

• "More Scaling Laws for Ram-Air Parachute Inflation"; AIAA Paper, AIAA-2001-2072.

• "Altitude- and Weight Scaling Laws for Ram-Air Parachute Inflation". Journal of Aircraft, Vol. 38, No. 5, pp.956-958, 2001.

• "Fluid-Structure Interactions of a Cross-Parachute: Numerical Simulation"; with R. Stein, R. Benney and T. Tezduyar. To appear in Computer Methods in Applied Mechanics and Engineering in 2001.

• "Modeling the Inflation of Ram-Air Parachutes Reefed with Sliders"; with B. Brocato and G. Peek . Journal of Aircraft,Vol. 38, No. 5, pp.818-827, 2001.

• "Experimental Validation of the Ideal Parachute Model: A Status Report"; with B. Brocato and G. Peek; AIAA paper 1999, AIAA-99-1746.

• "The Improved Ideal Parachute Model and Its Application to the Study of Inflation Dydnamics of Slider-Reefed Ram-Air and Round Parachutes"; with T. Perschbacher; AIAA paper 1999, AIAA-99-1750.

• "In-Flight Study of Cell Pressurization Inside Inflating Smokejumper Ram-Air Parachutes; with G. Peek; AIAA paper 1999, AIAA-99-1756.

• "Experimental Study of Fluid-Structure Interactions on a Cross Parachute: Comparision of wind tunneldata and Drop Data with CFD Predictions"; with B. Brocato, L. Esteve, D. Garcia, C. Manglano, G. Peek, K. Stein, R. Benney, R. Alamat and J. Little; AIAA paper 1999, AIAA-99-1737.

• "Fluid-Structure Interaction Simulation of Cross Parachute: Comparison of Numerical Predictions with Wind Tunnel Data"; with Stein, K., Benney, R., Kalro, V., Tezduyar, and T., Bretl, T. ; AIAA paper 1999; AIAA-99-1725.

• "Wind Tunnel Study of Cruciform Parachutes Folded in Various Configurations"; with L. Esteve, G. Peek, R. Alamat and J. Little; AIAA paper 1999, AIAA-99-1739

• "A Simple Description of Airflow Characteristics Inside an Unfolding Parachute"; Journal of Aircraft, Vol. 36, No. 5, pp. 809 - 818, 1999.

• "Parachute Inflation", 1998 McGraw-Hill Yearbook of Science and Technology.

• "In-Flight Study of Pressure Differentials Near the Surfaces of an Inflating Ram-Air Parachute; AIAA paper 1998, AIAA-98-2529.

• "Testing a New Model of Ram-Air Parachute Inflation"; The Aeronautical Journal, Vol. 101, pp. 299-313,1997.

• "The Parks College Ram-Air Parachute Deployment Study: A Status Report"; with R. Montanez and G.E. Peek, AIAA paper 1997, AIAA-97-1426.

• "Wind Tunnel Investigation of Ram-Air Parachute Cell Pressurization" with R. Montanez and G.E. Peek, AIAA paper 1997, AIAA-97-1524.

• "Theoretical and Experimental Studies of Ram-Air Parachute Deployment Observable Variance", AIAA paper 1997, AIAA-97-1544.

• "Deployment Model for Slider-Reefed Ram-Air Parachutes", AIAA paper 1995, 95-1564.