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Refereed articles or reviews Ayers, P. D., F. Khorsandi, M. Poland, and C. Hilliard. 2019. Foldable rollover protective structures: Universal lift-assist design. Biosystems Engineering Special Issue, 185 (2019) 116-124. Bozdech, G.*, P. D. Ayers, and D. Irick. 2019. Validation of a GPS-based vehicle mobility power model. International Journal of Vehicle Performance, Vol. 5, No. 4, pp.409429. Connell, B.*, P. D. Ayers, A. L. Ludwig, K. Neff, and J. Parham. 2019. Connell, B., P. Ayers, K. Swinson. 2019. Georeferenced Video Mapping to Classify Streambank Erosion Susceptibility. Under review for. Journal of Spatial Hydrology, 15(2):1-15. Giovanni, M., P. D. Ayers, H. Meyer, and V. Rondelli. 2019. Engineering advances to improve the safety of agricultural machines. Biosystems Engineering, 185: 1-3. Khorsandi, F.*, P. D. Ayers, and E. Fong. 2019. Evaluation of Crush Protection Devices for Agricultural All-Terrain Vehicles (ATV). Biosystems Engineering, 185 (2019) 161-173. Lagerstrom, E., S. Magzamen,, W. Brazile,, L. Stallones, P. D. Ayers, and J. Rosecrance. 2019. A case study in the application of the systematic approach to training in the logging industry. Safety, 5(3), 43. Zheng, M., B. G. Leib, D. M. Butler, W. C. Wright, P. D. Ayers, D. G. Hayes, A. Haghverdi, T. Grant, P. Vanchiasong, and M. Muchoki. 2019. Assessing heat management practices in high tunnels to improve organic production of bell peppers. Scientia Horticulturae, 246: 928-941. Zheng, M., B. G. Leib, D. M. Butler, W. C. Wright, P. D. Ayers, D. G. Hayes, and A. Haghverdi. 2019. Assessing heat management practices in high tunnels to improve production of romaine lettuce. Agriculture, 9, 203. Zheng, M., B. G. Leib, W. C. Wright, and P. D. Ayers. 2019. Neural models to predict temperature and natural ventilation in a high tunnel. Transactions of ASABE, 62(3): 761-769. Ayers, P. D., F. Khorsandi, X. Wang, and G. Araujo. 2018. ROPS designs to protect operators during tractor rollovers. Journal of Terramechanics, 75(2018): 49-55. Ayers, P. D., J. Conger, R. Comer, and P. Troutt. 2018. Stability analysis of agricultural off-road vehicles. Journal of Agricultural Safety and Health, 24(3): 167-182. Hensley, K.*, and P. D. Ayers. 2018. Estimating streambank erosion with a GPS-based video mapping system and the BANCS model. Journal of the American Water Resources Association, 54(6):1185-1196. Khorsandi, F.*, and P. D. Ayers. 2018. The effect of friction on actuation forces of the foldable ROPS. Journal of Agricultural Safety and Health, 24(5) 227-242. Khorsandi, F.*, P. D. Ayers, R. S. Freeland, and X. Wang. 2018. Modeling the effect of liquid movement on the center of gravity calculation of agricultural vehicles. Journal of Terramechanics, 75 (2018) 3748. Ayers, P. D., and M. Rice. 2017. Analysis of vehicle platoon movement and speed-spacing relationships during military exercises. Journal of Terramechanics, 73(2017): 37-47. Fidan, E.*, and P. D. Ayers. 2017. Streambank erosion mapping on the Nottoway River using GPS-based abovewater video. Journal of Undergraduate Research, 8(1): 57-68. Hill, L.*, and P. D. Ayers. 2017. Evaluation of foldable tractor ROPS clearance. The Journal of Undergraduate Research, 8(1): 85-92. Khorsandi, F.*, P. D. Ayers, and T. Truster. 2017. Developing and evaluating a finite element model for predicting the Roll-Over Protective Structure (ROPS) nonlinear behavior under SAE J2194 Static Test. Biosystems Engineering, 156(2017) 96-107. Oyedeji O., C. S. Daw, N. Labbe, P. D. Ayers, and N. Abdoulmoumine. 2017. Kinetics of the release of elemental precursors of syngas and syngas contaminants during switchgrass devolatilization. Bioresource Technology, 244, 525-533. Svendsen N., D. Koch, G. Gertner, H. Howard, and P. D. Ayers. 2017. Vehicle impact analysis using vehicle tracking systems on military lands. Transactions of the ASABE, 60(6): 1865-1872. Zheng, M., B. G. Leib, D. M. Butler, W. C. Wright, P. D. Ayers, and D. G. Hayes. 2017. Modeling energy balance and airflow characteristics in a naturally ventilated high tunnel. Transactions of the ASABE, 60(5): 1683-1697 (doi: 10.13031/trans.12080). Ayers, P. D., and V. Rondelli. 2016. Tractor ROPS and stability research: Introduction to this special issue. Journal for Agricultural Safety and Health, 22(4): 213-214. Ayers, P. D., F. Khorsandi, Y. John, and G. Whitaker. 2016. Development and evaluation of a computer-based ROPS design program. Journal for Agricultural Safety and Health, 22(4): 247-260. Haghverdi, A., B. G. Leib, R. A. Washington-Allen, M. J. Buschermohle, and P. D. Ayers. 2016. Studying uniform and variable rate center pivot irrigation strategies with the aid of site specific water production functions. Computers and Electronics in Agriculture, 123:327-340. Jordan, H.*, and P. D. Ayers. 2016. Spatial distribution of water quality parameters using kayak-mounted sensor. Journal of Undergraduate Research at the University of Tennessee, 7(1):125-133. Khorsandi, F.*, P. D. Ayers, D. Jackson, and J. B. Wilkerson. 2016. Effect of speed on foldable ROPS actuation forces. Journal for Agricultural Safety and Health, 22(4): 285-298. Tinc, P. J., P. D. Ayers, J. J. May, M. A. Purschwitz, and J. S. Sorenson. 2016. Implementing a national tractor safety program: using whole system in a room to mobilize partners and implement solutions. Journal of Agromedicine, 21(2):127-131. Wang, X.*, L. Gao, P. D. Ayers, S. Su, and C. Yuan. 2016. The influence of lift angle on center of gravity measurements for Zero Turn Radius mowers. Applied Engineering in Agriculture, ASABE 32(2):189-199. Wang, X.*, P. Mi, P. D. Ayers, B. Tang, P. Wu, and Q. Ding. 2016. Measurement of moment of inertia for a zero turn radius mower based on the compound pendulum method. Applied Engineering in Agriculture, 32(4):323-332. Haghverdi, A, B. G. Leib, R. A. Washington-Allen, P. D. Ayers, and M. J. Buschermohle. 2015. Perspectives on Delineating Management Zones for Variable Rate Irrigation. Computers and Electronics in Agriculture, Volume 117: 154-167. Haghverdi, A, B. G. Leib, R. A. Washington-Allen, P. D. Ayers, and M. J. Buschermohle. 2015. High-Resolution Prediction of Soil Available Water Content within the Crop Root Zone. Journal of Hydrology, Volume 530: 167-179. Ren, S., X. Ye, and P. D. Ayers. 2015. Tandem catalytic conversion of glycerol using solid catalysts followed by transesterification to produce alkyl lactate. RSC Advances, 5, 53230-53239. Tinc, P. J., P. D. Ayers, J. J. May, M. A. Purschwitz, and J. S. Sorenson. 2015. Creating a national partnership to address tractor rollover fatalities. Journal of Agricultural Safety and Health 21(2):105-112. Barbour, W.W.*, and P. D. Ayers. 2014. Vehicle multi-pass rut volume and mobility power. Pursuit: The Journal of Undergraduate Research, 5(1): 1-8. Kane, J.*, P. D. Ayers, H. Howard, A. Anderson, and D. Koch. 2013. Multipass coefficients for terrain impacts based on military vehicle type and dynamic operating properties. Journal of Terramechanics, 50 (2013) 175-183. Shoop, S.A., C. Sandu, and P. D. Ayers. 2013. Introduction: Best papers from the 50th anniversary conference. Journal of Terramechanics, 50(1):3-4. Madsen, J., D. Negrut, A. Reid, A. Seidl, P. D. Ayers, G. Bozdech, J. Freeman, and J. O'kins. 2012. A physics-based vehicle/terrain interaction model for soft soil off-road vehicle simulations. Society of Automotive Engineering Journal of Commercial Vehicles, 5:280-290. Harris, G., G. Winn, P. D. Ayers, and E. McKenzie. 2011. Predicting the performance of cost-effective rollover protective structure designs. Safety Science 49(2011): 1252-1261. Liu, K.*, P. D. Ayers, H. Howard, A. Anderson, and J. Kane. 2011. Multi-pass rutting study for turning wheeled and tracked vehicles. Transactions of the ASABE, 54(1):5-12. Freeland, R. S., P. D. Ayers, J. B. Wilkerson, and J. P. Rowe. 2010. Plant Survival Assessment on Wetland and Stream Mitigation Sites Using GPS/GIS Geotagging. Applied Engineering in Agriculture Vol. 26(4): 701-706. Liu, K*, P. D. Ayers, H. Howard, and A. Anderson. 2010. Influence of soil and vehicle parameters on soil rut formation. Journal of Terramechanics, 47(2010):143-150. Liu, K.*, P. D. Ayers, H. Howard, and A. Anderson. 2010. Lateral slide sinkage tests for a tire and track shoe. Journal of Terramechanics, 47(2010):407-414. Liu, K.*, P. D. Ayers, H. Howard, R. Jones, and A. Anderson. 2010. Prediction of rut depth during military vehicle turning maneuvers using a modified soil numeric. Transactions of the ASABE, 53(4):1019-1024. Anderson, A., P. D. Ayers, H. Howard, P. Sullivan, D. Horner, M. Faust, and K. Peppel. 2009. Vehicle impacts on vegetation cover at Camp Atterbury, Indiana, USA: Part 3. Predicting cumulative impact of a military training event. Proceedings of the Indiana Academy of Sciences 118(2):335-351. Liu, K.*, P. D. Ayers, H. Howard, and A. Anderson. 2009. Influence of turning radius on military vehicle induced rut formation. Journal of Terramechanics, 46(2): 49-55. Wang, X., P. D. Ayers, and A. R. Womac. 2009. Static simulation and analyses of mower's ROPS behavior in a finite element model. Journal of Agricultural Safety and Health 15(4):335-351. Wang, X.*, P. D. Ayers, and A. R. Womac. 2009. Simulation and analyses of mowers ROPS behavior in finite element method. Journal of Agricultural Safety and Health, 15(4):335-351. Li, Q., P. D. Ayers, and A. Anderson. 2008. Modeling of terrain impact caused by tracked vehicles. Journal of Terramechanics, 44(4):395-410. Shoop, S., B. Coutermarsh, P. D. Ayers, A. Anderson, and R. Affleck. 2008. Tire force and terrain disturbance measurements during turning maneuvers. Transactions of the ASABE 51(6): 1869-1878. . Wu, C., P. D. Ayers, and A. Anderson. 2008. Quantifying the intensity of vehicle impacts using vehicle tracking devices during live training exercises. Journal of Terramechanics 45(1):1-11. . Anderson, A. B., P. D. Ayers, P. Sullivan, and W. R. Ochsner. 2007. Vehicle impacts on vegetation cover at Camp Atterbury, Indiana: Part 1. Initial impacts and vegetation recovery. Proceedings of the Indiana Academy of Sciences (116):139-147. Anderson, A. B., P. D. Ayers, P. Sullivan, and W. R. Ochsner. 2007. Vehicle impacts on vegetation cover at Camp Atterbury, Indiana: Part 2. Predicting impacts of untested vehicles. Proceedings of the Indiana Academy of Sciences (116):139-147. Comer, R. S., P. D. Ayers, and J. Liu. 2007. Evaluation of Engineering Plastic for Rollover Protective Structures (ROPS) Mounting. Journal of Agricultural Safety and Health 13 (2): 137-145. Li, Q., P. D. Ayers, and A. B. Anderson. 2007. Prediction of Impacts of Wheeled Vehicles on Terrain. Journal of Terramechanics 44(2): 205-215. Li, Q., P. D. Ayers, and A. B. Anderson. 2007. Effects of Speed and Turning Radius on Terrain Impact Severity of Off-road Vehicles. Applied Engineering in Agriculture 23(6): 701-706. Wang, X., P. D. Ayers, A. R. Womac, and D. Depauw. 2007. Sensitivity Analysis and Validation of Continuous Roll Prediction Model for Front Drive Mowers. Applied Engineering in Agriculture 23(4): 455-461. Wu, C., P. D. Ayers, and A. Anderson. 2007. GIS And Neural Network Method for Potential Road Identification. Transactions of the ASABE 50(4): 1455-1463. Wu, C., P. D. Ayers, and A. Anderson. 2007. Validating A GIS-Based Multi-Criteria Method for Potential Road Identification. Journal of Terramechanics 44(3): 255-263. Anderson, A.B., A. J. Palazzo, P. D. Ayers, J. S. Fehmi, S. Shoop, and P. Sullivan. 2005. Assessing the Impacts of Military Vehicles on Natural Areas. Journal of Terramechanics 42(3-4) 143-158. Ayers, P. D., A. B. Anderson, and C. Wu. 2005. Analysis of Vehicle Use Patterns During Field Training Exercises. Journal of Terramechanics 42(3-4) 321-338. Bauder, T., K. Barbarick, J. Ippolito, J. Shanahan, and P. D. Ayers. 2005. Soil Properties Affecting Wheat Yields following Drill-Fluid Application. Journal of Environmental Quality 24(5) 1687-1696. Anglund, E. A., and P. D. Ayers. 2003. Field Evaluation of Response Times for a Variable Rate Liquid Chemical Applicator. Applied Engineering in Agriculture 19(3):273-282. Haugen, L. B., P. D. Ayers, and A. B. Anderson. 2003. Vehicle Movement Patterns and Impact During Military Training Exercises. Journal of Terramechanics 40(2):83-95. Al-Gaadi, K. A., and P. D. Ayers. 1999. Integrating GIS and GPS into A Spatially Variable Rate Herbicide Application System - System Development and Field Evaluation. Applied Engineering in Agriculture 15(4): 255-262. Bauder, T. A., K. A. Barabarick, J. F. Shannahan, P. D. Ayers, and P. Chapman. 1999. Drilling-Fluid Effects on Crop Growth and Iron and Zinc Availability. Journal of Environmental Quality 28:744-749. Liu, J., and P. D. Ayers. 1999. Off-Road Vehicle Rollover and Field-Testing Of Stability Index. Journal of Agricultural Safety and Health 5(1): 59-71. Al-Gaadi, K. A., and P. D. Ayers. 1998. Assembling a Real-Time DGPS, Testing And Investigating Factors That Affect Its Accuracy. Applied Engineering in Agriculture 14(6): 659-665. Liu, J., and P. D. Ayers. 1998. Applications of Tractor Stability Index in Development of Control Strategies for Protective Structures. Journal of Agricultural Safety and Health. Special Issue (1): 171-181. Book chapters or books Bulletins, reports, circulars, pamphlets, factsheets Ayers, P. D. 2005. ROPS Design and Testing for Agricultural Vehicles. Annual Report submitted to High Plains Intermountain Center for Agricultural Health and Safety for the National Institute for Occupational Safety and Health. Contract #U50 OH07545-03. Ayers, P. D. 2005. Evaluation of Tracking Study for Maneuvers Performed at Fort Riley, Kansas Military Installation in May of 2005. Research Report Submitted to Fort Riley Military Installation. Ayers, P. D., C. D. Butler, A. J. Fiscor, C. Wu, and A. Anderson. 2005. Vehicle Impact Study at Fort Riley, Kansas, October 2004. Research Report Submitted to Fort Riley Military Installation. Ayers, P. D., C. D. Butler, A. J. Fiscor, C. Wu, Q. Li, and A. Anderson. 2005. Vehicle Impact Study at Fort Riley, Kansas, April 2005. Research Report Submitted to Fort Riley Military Installation. Ayers, P. D., C. D. Butler, A. J. Fiscor, Q. Li, M. K. Rice, C. Wu, and A. Anderson. 2005. Vehicle Impact Study for M2A2 Bradley at Fort Riley, Kansas, October 2004. Research Report Submitted to Fort Riley Military Installation. Ayers, P. D., C. D. Butler, and A. Anderson. 2005. Vehicle Impact Study Wet vs. Dry at Fort Riley, Kansas. Research Report Submitted to Fort Riley Military Installation. Ayers, P. D., C. Wu, and A. Anderson. 2005. Identifying New Roads for GPS Vehicle Tracking in Military Training Exercises. Research Report Submitted to Yakima Training Center. Ayers, P. D., Q. Li, A. J. Fiscor, S. T. Cheung, P. E. Troutt, and M. K. Bacon. 2004. Evaluation of Low Impact Tires. U.S. Army Corps of Engineers Public Works Technical Bulletin, April. Cheng, Z., S. Rogers, and P. D. Ayers. 2004. An Exotic and Endangered Species Survey of The Obed Wild and Scenic River Between Jett Bridge and Barnet Bridge. Research Report submitted to the U.S. Dept of Interior, National Park Service, Obed National Wild and Scenic River (OBRI). Ayers, P. D., L. Haugen, M. Vance, and A. Anderson. 2000. An Evaluation of DGPS-Based Continuously Operating Vehicle Monitoring Systems to Determine Site-Specific Vehicle Event Severity Factors. U.S. Army Corps of Engineers ERDC Technical Report TR-00-43. Popular press, trade, UTIA magazine or newsletter articles Ayers, P. D. 2018. Mapping Habitat of At-Risk Aquatic Species at Fort Pickett. Natural Selections DoD Natural Resource Program, Summer 2018. Ayers, P. D., and F. Khorsandi. 2017. Reducing tractor rollover fatalities, Progress in ROPS Technology. ASABE Resource, 24 (6) 6-7. Ayers, P. D. 2013. Tractor Safety on Dairy Farms. Progressive Dairyman, May 9. Ayers, P. D. 2010. Underwater video mapping system. Red Hen Newsletter. Ayers, P. D., and J. Hughes. 2010. Underwater video habitat mapping at Obed Wild and Scenic River. Park Science 27(2):24-25. Abstracts from scientific or discipline meetings, papers from conference proceedings Ayers, P. D. 2019. Evaluation of a foldable ROPS universal lift-assist design. Presented at the 2019 Western Ag Safety and Health Conference, Seattle, WA.. Ayers, P. D. 2019. National ROPS Rebate Program (NRRP). Poster and lightning talk presented at the 2019 Western Ag Safety and Health Conference, Seattle, WA. Ayers, P. D. 2019. Engineering designs for off-road vehicle rollover protection. Poster presented at the 2019 ISTVS Conference. Prague, Czech Republic.. Ayers, P. D., F. Khorsandi, M. Poland, and C. Hilliard. 2019. Universal Foldable ROPS Lift Assist Designs with Torsion Spring. Poster presented at the 2019 ASABE Conference, Boston, MA.. Ayers, P. D., H. Howard, and A. Anderson. 2019. Military vehicle-induced soil rutting: Field study results. Presented at the 2019 ISTVS Conference. Prague, Czech Republic.. Howard, H., P. D. Ayers, A. Anderson, W. Wall, and R. Floyd. 2019. Estimation of military vehicle/terrain impacts: History and approach for new vehicle systems. Presented at the 2019 ISTVS Conference. Prague, Czech Republic.. Khorsandi, F*, H. Chou, E. Fong, P. D. Ayers, and F. Fathalla. 2019. Crush protection devices for agricultural all-terrain vehicles. Poster presented at the 2019 Western Ag Safety and Health Conference, Seattle, WA.. Khorsandi, F.*, E. Fong, and P. D. Ayers. 2019. Evaluation of crush protection devices performance in agricultural all-terrain vehicle accidents. Presented at the 2019 Western Ag Safety and Health Conference, Seattle, WA.. Khorsandi, F.*, E. Fong, and P. D. Ayers. 2019. Evaluation of Crush Protection Devices Performance in Agricultural All-Terrain Vehicles Accidents. Presented at the 2019 ISASH Conference, Des Moines, IA.. Khorsandi, F.*, E. Fong, and P. D. Ayers. 2019. Evaluation of the Crush Protection Zone of Three Crush Protection Devices. Presented at the 2019 ASABE Conference, Boston, MA.. Khorsandi, F.*, P. D. Ayers, G. Denning, C. Jennissen, D. Jepsen, M. Myers, S. Oesch, M. Pate, D. White, and A. Yoder. 2019. Agricultural All-Terrain Vehicle Safety. Presented at the 2019 ISASH Conference, Des Moines, IA.. Khorsandi, F.*, P. D. Ayers, G. Denning, C. Jennissen, D. Jepsen, M. Myers, S. Oesch, M. Pate, M. Salzwedel, D. White, and A. Yoder. 2019. Agricultural All-Terrain Vehicle Safety. Presented at the 2019 ASABE Conference, Boston, MA.. Ayers, P. D. 2018. Influence of Foldable ROPS size on lift assist designs. Presented at the 2018 ISASH Conference. Halifax, Nova Scotia.. Ayers, P. D. 2018. Kayak/Snorkel/Scuba-based underwater videomapping system for aquatic habitat management. Poster presented at the SD American Fisheries Society Annual Meeting. San Juan, Puerto Rico. Ayers, P. D., and F. Khorsandi. 2018. Evaluation of foldable ROPS lift assist designs. Poster presented at the 2018 ASABE Conference, Detroit, MI.. Ayers, P. D., and F. Khorsandi. 2018. Foldable ROPS lift assist design: Engineering controls to reduce tractor rollover fatalities. Poster presented at the 2018 ASHCA Conference, Scottsdale, AZ.. Ayers, P. D., and R. Carlile. 2018. GPS-based vehicle lateral acceleration measurement and applications to terrain impact and stability. Proceedings of the International Society for Terrain-Vehicle Systems, Kyoto, Japan.. Ayers, P. D., B. Connell, and J. Parham. 2018. Georeferenced video and sensor technologies for aquatic habitat and fish species distribution mapping. Presented at the Southern Division American Fisheries Society Annual Meeting. San Juan, Puerto Rico.. Ayers, P. D., D. Jackson, and E. Fidan. 2018. GPS-based snorkel videomapping for fish population surveys: day vs. night. Presented at the American Fisheries Society Tennessee Chapter Annual Meeting. Knoxville, TN.. Khorsandi, F.*, and P. D. Ayers. 2018. Evaluating the effect of friction and speed on foldable ROPS actuation forces. Presented at the 2018 ASABE Conference, Detroit, MI.. Khorsandi, F.*, and P. D. Ayers. 2018. Evaluating the effect of friction on foldable ROPS actuation forces. Poster presented at the 2018 ASHCA Conference, Scottsdale, AZ.. Ludwig, A. L., P. D. Ayers, E. Essington, M. E. Essington, S. A. Hawkins, and F. R. Walker. 2018. Low head dam sediment characterization in southeast Tennessee second order stream. Abstracts of the 18th Annual American Ecological Society Meetings. Ayers, P. D. 2017. Kayak-based underwater videomapping system for watershed-scale wild trout habitat management. Poster presented at the Wild Trout Symposium. West Yellowstone, WY.. Ayers, P. D. 2017. Improving commercial mower safety: foldable ROPS. Presented at the 2017 TNAPPA Conference, Knoxville, TN.. Ayers, P. D., and F. Khorsandi. 2017. Measuring foldable ROPS actuation forces. Poster presented at the 2017 ASABE Conference, Spokane, WA.. Ayers, P. D., and F. Khorsandi. 2017. Foldable ROPS lift assist preliminary design considerations. Presented at the 2017 ISASH Conference. Logan, UT. Presented at the 2017 ISASH Conference. Logan, UT.. Ayers, P. D., and H. Jordan. 2017. Kayak-based geospatial water quality measurements. Presented at the 2017 ASABE Conference, Spokane, WA.. Ayers, P. D., D. Jackson, and E. Fidan. 2017. Wild trout population surveys using day and night GPS-based snorkel videomapping in the Great Smoky Mountains and Yellowstone National Park. Poster presented at the Wild Trout Symposium. West Yellowstone, WY.. Khorsandi, F.*, and P. D. Ayers. 2017. Developing a finite element model to predict the performance of ROPS with minor structural modification under standard tests. Presented at the 2017 ASABE Conference, Spokane, WA.. Walker, F. R., A. L. Ludwig, M. E. Essington, S. A. Hawkins, L. B. Reynolds, and P. D. Ayers. 2017. Preparations for dam removal in Athens, Tennessee. Proceedings of the 26th Tennessee Water Resources Symposium, p. 2A-10, Tennessee Section of the American Water Resources Association. Ayers, P. D. 2016. Georeferenced river sensor and video for water quality, aquatic habitat, fish population and streambank erosion mapping. Poster presented at the 2016 ASABE Conference, Orlando, FL.. Ayers, P. D. 2016. River ecology mapping using geospatial sensors and video. Presented at the Annual meeting of the American Ecological Engineering Society, Knoxville, TN. Ayers, P. D., and M. Rice. 2016. Analysis of vehicle platoon movement during military exercises. Presented at the Conference of the International Society for Terrain-Vehicle Systems, Detroit, MI.. Ayers, P. D., F. Khorsandi, D. Jackson, and G. Araujo. 2016. ROPS designs to protect operators during tractor rollovers. Presented at the Conference of the International Society for Terrain-Vehicle Systems, Detroit, MI.. Khorsandi, F.*, and P. D. Ayers. 2016. Simulating SAE J2194 static test to predict the Roll-Over Protective Structure (ROPS) behavior using finite element model. Presented at the 2016 ASABE Conference, Orlando, FL.. Ayers, P. D. 2015. Underwater videomapping development and evolution. Southern District AFS, Chattanooga, TN. Ayers, P. D. 2015. Kayak-based videomapping river systems for determining habitat distribution and large-scale aquatic population monitoring. Poster presented at the Southern District AFS, Chattanooga, TN.. Ayers, P. D. 2015. ROPS activities in the United States. Presented at the International Conference on Rural Health, Lodi, Italy. Ayers, P. D., A. Anderson, and H. Howard. 2015. Monitoring and managing military vehicle-terrain impacts. Presented at the Conference of the International Society for Terrain-Vehicle Systems, Rome, Italy. Ayers, P. D., and F. Khorsandi. 2015. ROPS design and testing for rigid and foldable structures: Computer-based ROPS Design Program (CRDP) and foldable ROPS force analysis and lift assist design. Presented at the International Conference on Rural Health, Lodi, Italy. Ayers, P. D., F. Khorsandi, Y. John, G. Whitaker, and J. Dixon. 2015. Protecting operators during tractor overturns Foldable ROPS lift assist and Computer-based ROPS Design Program (CRDP). Presented at the 2015 ISASH Conference. Normal, IL.. Ayers, P. D., F. Khorsandi, Y. John, G. Whitaker, and J. Dixon. 2015. Computer-based ROPS Design Program (CRDP): Evaluation of initial validation testing and implementation process. Presented at the 2015 ASABE Conference, New Orleans, LA. Ayers, P. D., H. Howard, N. Svendsen, W. Wall, and D. Gambill. 2015. Multiple GPS tracking systems to quantify vehicle distribution and terrain impacts. Presented at the Conference of the International Society for Terrain-Vehicle Systems, Rome, Italy. Ayers, P. D., W. Wall, A. Fulton, D. Gambill, and H. Howard. 2015. Determination of USCS from USDA soil classification for vehicle impact quantification. Presented at the Conference of the International Society for Terrain-Vehicle Systems, Rome, Italy. Barbour, W.W.*, and P. D. Ayers. 2015. Integration of spatial and continuous water parameter measurement with existing aquatic habitat and streambank mapping. Presented at the 2015 Haslam Scholars Senior Research Colloquium. Knoxville, TN. Haghverdi, A., B. G. Leib, M. J. Buschermohle, and P. D. Ayers. 2015. A site-specific and dynamic modeling system for zoning and optimizing variable rate irrigation in cotton. ASABE Annual International Meeting, July 26-29, 2015, New Orleans, LA. Khorsandi, F.*, and P. D. Ayers. 2015. Developing a Finite Element (FE) model to predict the Roll-Over Protective Structure (ROPS) behavior under SAE J2194 Standard test. Presented at the 2015 ASABE Conference, New Orleans, LA. Khorsandi, F.*, P. D. Ayers, and R. S. Freeland. 2015. Study on the effect of liquid movement on the stability angle measurement of off roads vehicles. Presented at the Conference of the International Society for Terrain-Vehicle Systems, Rome, Italy. Ayers, P. D. 2014. River mapping for endangered species habitat and streambank erosion assessment: Case studies at Fort Benning and Camp Atterbury. Presented at the National Military Fish and Wildlife Association, Denver, CO.. Ayers, P. D. 2014. Kayak-based videomapping for river system management. Presented at the 2014 RMS Conference, Denver, CO.. Ayers, P. D. 2014. Outstandingly remarkable value identification and assessment using georeferenced videomapping. Presented at the 2014 RMS Conference, Denver, CO.. Ayers, P. D., A. Shpik, H. Hill, and M. Kulp. 2014. GPS-based snorkel videomapping as an innovative survey technique for monitoring and mapping wild Brook trout populations in the Great Smoky Mountains National Park. Refereed Conference Proceeding for the Wild Trout Symposium.. Ayers, P. D., A. Shpik, H. Hill, and M. Kulp. 2014. GPS-based snorkel videomapping as an innovative survey technique for monitoring and mapping wild Brook trout populations in the Great Smoky Mountains National Park. Presented at the Wild Trout Symposium. West Yellowstone, WY.. Ayers, P. D., and A. Shpik. 2014. Kayak-based videomapping river systems for determining habitat distribution and large-scale wild trout population monitoring. Poster presented at the Wild Trout Symposium. West Yellowstone, WY.. Ayers, P. D., and X. Wang. 2014. Review of new developments and issues related to ROPS, center of gravity, vehicle stability and continuous roll standards and regulations for tractors and ZTR mowers. Presented at the 2014 ASABE Conference, Montreal, Canada. Ayers, P. D., H. Hill, Y. John, and G. Whitaker. 2014. Implementation and evaluation of a computer-based ROPS design program. Presented at the 2014 ASABE Conference, Montreal, Canada.. Ayers, P. D., K. Hensley, and D. Wade. 2014. Mapping watershed-scale streambank erosion using EPA-BANCS for determining TMDLs. Presented at the AWRA GIS and Water Resources Conference. Snowbird, UT. Presented at the AWRA GIS and Water Resources Conference. Snowbird, UT.. Ayers, P. D., K. Hensley, and D. Wade. 2014. Total river streambank erosion mapping using EPA-BANCS for determining TMDLs. Presented at the 2014 ASABE Conference, Montreal, Canada.. Ayers, P. D., K. Hensley, D. Wade, B. Connell, and K. Swinson. 2014. Kayak-based videomapping of watershed-scale streambank erosion using EPA-BANCS. Poster presented at the AWRA GIS and Water Resources Conference. Snowbird, UT.. Hensley, K.*, and P. D. Ayers. 2014. Predicting site-specific daily streambank erosion to develop TMDLs for sediment using GPS-based watershed scale video mapping and EPA BANCS. Presented at the 2014 Watershed Symposium, Knoxville TN.. Wade, D.*, and P. D. Ayers. 2014. Streambank erosivity and substrate mapping using SVMS on the East Fork Poplar Creek. Poster presented at the 2014 Watershed Symposium, Knoxville TN.. Ayers, P. D. 2013. ROPS and stability research forum: review of US activity. OECD ROPS and Stability Research Forum., Bologna, Italy. (invited) Ayers, P. D., D. Wade, and M. Ellison. 2013. Military vehicle off-road axle power requirements as related to soil and tire compression. Conference of the International Society for Terrain-Vehicle Systems, Tampa, FL. Ayers, P. D., D. Wade, J. Yantis, and J. Freeman. 2013. Modeling vehicle power requirements with tire compression and terrain interaction. ASABE Conference, Kansas City, MO. Ayers, P. D., J. Yantis, C. Bradley, and G. Davis. 2013. Development of a computer-based ROPS design program. ASABE Conference, Kansas City, MO. Ayers, P. D., K. Hensley, D. Wade, K. Swinson, B. Connell, B. McConkey, J. Candlish, C. King, A. Shpik, W. Barbour, and M. Ellison. 2013. Kayak-based videomapping river systems for determining optimal habitat for endangered fish and mussels. Southern District AFS, Nashville, TN. Ayers, P. D., W. Barbour, A. Smith, B. Connell, K. Swinson, C. King, and A. Shpik. 2013. GPS-based snorkel survey mapping and under structure video exploration for aquatic population monitoring. Southern District AFS, Nashville, TN. Hensley, K.*, P. D. Ayers, K. Swinson, and B. Connell. 2013. Predicting site-specific daily streambank erosion using GPS-based watershed scale video mapping and EPA BANCS. ASABE Conference, Kansas City, MO. Hensley, K.*, P. D. Ayers, K. Swinson, and B. Connell. 2013. Developing a method to determine site-specific daily streambank erosion using GPS-based watershed scale video mapping. TN AWRA Conference. Burns, TN. Madsen, J., P. D. Ayers, and D. Negrut. 2013. Calibration and validation of a lower-order soil compaction model under non-uniform tire loads applied by a dynamic vehicle model. Conference of the International Society for Terrain-Vehicle Systems, Tampa, FL. Wade, D.*, P. D. Ayers, K. Hensley, and S. Brooks. 2013. Streambank erosivity and substrate mapping using SVMS on the East Fork Poplar Creek. TN AWRA Conference. Burns, TN. Zoz, F., and P. D. Ayers. 2013. Why (tractive) footprint length matters. ASABE Conference, Kansas City, MO. Ayers, P. D., and B. Connell. 2012. Landscape-scale GPS-based videomapping of streambank erosion susceptibility. ASABE Conference, Dallas, TX. Ayers, P. D., and B. Connell. 2012. Landscape-scale streambank erodibility and river hydraulic characteristic mapping. AWRA GIS Specialty Conference. New Orleans, LA. Ayers, P. D., and B. Connell. 2012. Geospatial solutions using GIS-based landscape-scale river maps for Tennessee river systems. AWRA GIS Specialty Conference. New Orleans, LA. Ayers, P. D., and G. Davis. 2012. ROPS design program. ISASH Conference. Burlington, VT. Ayers, P. D., and G. Davis. 2012. Computer modeling for ROPS design. ASABE Conference, Dallas, TX. Ayers, P. D., B. Connell, and K. Swinson. 2012. GIS-based Stream bank mapping to identify areas of erosion potential on rivers/streams within military installations. NWFWA Conference. Atlanta, GA. Ayers, P. D., G. Davis, J. Yantis, and S. Kerrigan. 2012. Improving ROPS designs for agricultural tractors. SHWA Conference, Ragusa, Italy. Ayers, P. D., K. Hensley, K. Swinson, B. Connell, B. McConkey, J.R. Candlish, C. King, J. Bevington, M. Ellison, and W. Barbour. 2012. GIS-based watershed-scale river mapping. RMS Conference, Asheville, NC. Ayers, P. D., K. Swinson, B. Connell, B. McConkey, J. Candlish, C. King, and M. Ellison. 2012. GIS-based landscape-scale river habitat and stream bank mapping for Tennessee river systems. ASABE 21st Century Watershed Technology Conference and Workshop, Bari, Italy. Ayers, P. D., K. Swinson, B. Connell, B. McConkey, J. Candlish, C. King, J. Bevington, and M. Ellison. 2012. GIS-based landscape-scale river mapping for virtual video access. RMS Conference, Asheville, NC. Ayers, P. D., K. Swinson, B. Connell, B. McConkey, J. Candlish, M. Ellison, and C. King. 2012. Mapping Tennessee river systems with sensor technology and georeferenced above and below water video. TN AWRA Conference. Burns, TN. Ayers, P. D., M. Groothuis, J. Kruckeberg, W. Nichols, A. Samba, C. Shaver, and C. Bradley. 2012. Design of a powered foldable ROPS. ASABE Conference, Dallas, TX. Ayers, P. D., S. Kerrigan, and B. Connell. 2012. GIS-based mapping of outstandingly remarkable values on the Wekiva Wild and Scenic River. RMS Conference, Asheville, NC. Connell, B.*, and P. D. Ayers. 2012. Streambank video mapping to determine erosion susceptible areas. TN AWRA Conference. Burns, TN. Connell, B.*, P. D. Ayers, and K. Swinson. 2012. Sensor and video technology for landscape-scale streambank erosivity and river hydraulic characteristic mapping. TN AWRA Conference. Burns, TN. Connell, B.*, P. D. Ayers, S. Bakaletz, K. Swinson, J. Candlish, and C. King. 2012. GIS-based landscape-scale river mapping for Tennessee river systems. TN AFS Conference, Spencer, TN. Ayers, P. D. 2011. Underwater video mapping for assessing and monitoring coral reef ecosystem health and fish habitat. 19th Annual Southern Division of the American Fisheries Society Annual Meeting, Tampa, FL. Ayers, P. D., and G. Bozdech. 2011. GPS based mobility power analysis of military vehicles. Proceedings of the 2011 Ground Vehicle Systems Engineering and Technology Symposium, Warren, MI. Ayers, P. D., D. Koch, H. Howard, A. Anderson, J. Kane, and G. Bozdech. 2011. Evaluating terrain impacts by military vehicles using soil strength properties. ASABE Annual International Meeting, Louisville, KY. Ayers, P. D., G. Bozdech, J. Freeman, A. Reid, and J. O'kins. 2011. Development of a dynamic visco-elastic vehicle-soil interaction model for rut depth, energy and power determinations. 17th International Conference of the International Society for Terrain-Vehicle Systems, Blacksburg, VA. Ayers, P. D., G. Bozdech, J. Freeman, A. Reid, and J. O'kins. 2011. Soil engineering property determination for military vehicle terrain interaction model. ASABE Annual International Meeting Louisville, KY. Ayers, P. D., K. Swinson, J. R. Candlish, B. McConkey, B. Connell, C. King, S. Bakaletz, et al. 2011. GIS-based landscape-scale aquatic habitat maps for Tennessee river systems. 11th Annual American Ecological Engineering Society Meeting, Asheville, NC. Ayers, P. D., S. Bakaletz, R. Schapansky, M. Kulp, and J. Herrig. 2011. Mapping aquatic habitat and fish populations for Tennessee river systems. Tennessee Chapter of the American Fisheries Society Annual Meeting, Montgomery Bell State Park, TN. Ayers, P. D., S. Bakaletz, R. Schapansky, M. Kulp, and J. Herrig. 2011. Creating aquatic and fish habitat maps for Tennessee river systems. Presented at the 19th Annual Southern Division of the American Fisheries Society Annual Meeting, Tampa, FL. Bevington, J.*, and P. D. Ayers. 2011. Streambank and underwater mapping using GPS-based video. 11th Annual American Ecological Engineering Society Meeting, Asheville, NC. Bozdech, G.*, and P. D. Ayers. 2011. GPS-based, mission specific mobility power/energy analysis. Proceedings of the 17th International Conference of the International Society for Terrain-Vehicle Sy. Bozdech, G.*, and P. D. Ayers. 2011. Mobility power analysis of military vehicles using GPS and soil physical properties. ASABE Annual International Conference. Louisville, Ky. Connell, B.*, and P. D. Ayers. 2011. Streambank/shoreline video mapping system to determine erosion susceptible areas. 11th Annual American Ecological Engineering Society Meeting, Asheville, NC. Howard, H., P. D. Ayers, D. Koch, A. Anderson, J. Kane, G. Bozdech, and N. Svendsen. 2011. Predicting soil erosion potential from military vehicle tracking and terrain impacts. ASABE Paper #11107 in the Proceedings of the International Symposium on Erosion and Landscape Evolution. Anchorage, AK. Kane, J.*, P. D. Ayers, H. Howard, A. Anderson, and D. Koch. 2011. Multipass coefficients for terrain impacts based on military vehicle type and dynamic operating properties. Proceedings of the 17th International Conference of the International Society for Terrain-Vehicle Systems, Blacksburg, VA. King, C*, P. D. Ayers, B. Connell, K. Swinson, and J. Herrig. 2011. Snorkel Camera Underwater Video Mapping System (SCUVMS) for georeferenced fish population analysis. Tennessee Chapter of the American Fisheries Society Annual Meeting, Montgomery Bell State Park, TN. King, C*, P. D. Ayers, B. Connell, K. Swinson, and J. Herrig. 2011. Snorkel camera underwater video mapping system for georeferenced fish population analysis. 19th Annual Southern Division of the American Fisheries Society Annual Meeting, Tampa, FL. Koch, D., H. Howard, P. D. Ayers, A. Dain-Owens, and A. Anderson. 2011. Assessing and characterizing military vehicle impacts in support of training land management. ASA Conference, San Antonio, TX. Koch, D., H. Howard, P. D. Ayers, and G. Siebert. 2011. Vehicle dynamics monitoring and tracking system: monitoring mission impacts in support of installation land management. SERDP Partnering Workshop. Washington DC. Koch, D., H. Howard, P. D. Ayers, and N. Svendsen. 2011. Military vehicle impact characterization in support of training land management. 2nd Annual U.S. Army training Support System Workshop, Dallas, TX. Koch, D., P. D. Ayers, H. Howard, and A. Anderson. 2011. Validation on military vehicle terrain impact models at multiple locations. Proceedings of the 17th International Conference of the International Society for Terrain-Vehicle Systems, Blacksburg, VA. Svendsen, N., D. Koch, H. Howard, P. D. Ayers, and A. Dain-Owens. 2011. Simulation and modeling for optimal land allocation of military training lands. ASABE Paper 11111 in the Proceedings of the International Symposium on Erosion and Landscape Evolution. Anchorage, AK. Swinson, K.*, P. D. Ayers, H. Howard, and M. Peterkin. 2011. Using sonar-based river depth measurement for cross]sectional and thalweg profile mapping. 11th Annual American Ecological Engineering Society Meeting, Asheville, NC. Ayers, P. D., and T. G. Prather. 2010. New Technologies for Mapping and Monitoring Land and Water Trail Attributes. 20th American Trails National Symposium, Chattanooga, TN. Nov 15, 2010. Ayers, P. D., B. McConkey, JR. Candlish, and K. Swinson. 2010. GPS-based underwater video for aquatic habitat mapping. River Society Management Meeting, Portland OR May. Ayers, P. D., B. McConkey, JR. Candlish, K. Swinson, and S. Bakaletz. 2010. Creating river habitat maps for the Obed and Big South Fork River Systems. Southern District of the American Fisheries Society, Asheville NC, Feb 25-28. Ayers, P. D., H. Howard, and R. Jones. 2010. Predicting rut depth during military vehicle maneuvers. Annual Training Support System Workshop - Chicago, IL, August. Ayers, P. D., H. Howard, D. Horner, D. Koch, A. Anderson, and D. Faucette. 2010. Estimation of vehicle impact damage through vehicle tracking systems and impact models. ASA Conference, Long Beach, CA, Oct 31-Nov 3. Ayers, P. D., K. Swinson, H. Howard, and M. Peterkin. 2010. Underwater video mapping to determine aquatic TES habitat in the Driftwood River at Camp Atterbury, Indiana. National Military Fish and Wildlife Association Proceedings, Milwaukee WI, March 22-26. Ayers, P. D., K. Swinson, H. Howard, and M. Peterkin. 2010. Underwater video mapping to determine aquatic TES habitat in the Driftwood River at Camp Atterbury. Annual Training Support System Workshop - Chicago, IL, August. Ayers, P. D., K. Swinson, H. Howard, M. Peterkin, and C. King. 2010. Underwater video mapping to determine potential population sources for TES/SAR in the Driftwood River at Camp Atterbury. SERDP Partnering Workshop - Washington DC December. Ayers, P. D., K. Swinson, J. Herrig, and P. Rakes. 2010. Aquatic habitat mapping using georeferenced underwater video in the Citico Creek, Cherokee National Forest. Southern District of the American Fisheries Society, Asheville NC, Feb 25-28. Howard, H., G. Gertner, A. Anderson, G. Wang, N. Svendsen, P. D. Ayers, and P. Woodford. 2010. Modeling long-term cumulative soil disturbance and individual training event impacts at Fort Riley, Kansas. ASA Conference, Long Beach, CA Oct 31-Nov 3. Koch, D., H. Howard, P. D. Ayers, and G. Siebert. 2010. Assessing vehicle training impacts in support of installation land management. SERDP Partnering Workshop, Washington, DC. Swinson, K.*, P. D. Ayers, H. Howard, and M. Peterkin. 2010. Using sonar-based river depth measurement for cross-section and thalweg profile mapping. ASABE Conference Proceeding, Pittsburgh, PA. Anderson, A, P. D. Ayers, and G. Siebert. 2009. Assessing the impact of mission changes on sustaining installation natural resources (year 2). Poster presented at the Partners in Environmental Technology Technical Symposium and Workshop, Washington D.C. Anderson, A., W. Ochsner, P. D. Ayers, and B. Hoerner. 2009. Vehicle impacts on vegetation at Camp Atterbury. Paper presented at the Sustainable Range Program Conference, Indianapolis, IN. Ayers, P. D., A. Anderson, and H. Howard. 2009. Tracking military vehicle to evaluate spatial land disturbance (vegetation loss). Paper Number 09-6245 presented at the ASABE Annual International Meeting. Ayers, P. D., and M. Kulp. 2009. Abrams creek underwater video mapping for federally-listed fish habitat. Great Smoky Mountains National Park Science Colloquium. Ayers, P. D., H. Howard, and A. Anderson. 2009. Use of GPS and GIS to estimate terrain impacts from military maneuvers. Presented at the ASA Conference, Pittsburgh, PA. Ayers, P. D., J. Freeman, F. Cook, J. O'Kins, and A. Reid. 2009. A physics-based vehicle terrain interaction model. ASABE Annual International Meeting Paper Number 09-6240. Ayers, P. D., J. R. Candlish, and J. B. McConkey. 2009. Creating River Habitat Maps for the Obed and Big South Fork River Systems. Presented at the Southeastern Water Trails Conference, Chattanooga, TN. October 29-30. Ayers, P. D., N. S. Potteti, A. Anderson, and H. Howard. 2009. Pre and post stryker transformation maneuvers at Pohakuloa Training Area, Hawaii: tracking military vehicles and using GIS to quantify site-specific dust generation. 11th European Conference of the International Society for Terrain-Vehicle Systems, Bremen, Germany. Ayers, P. D., N. S. Potteti, D. Faucette, C. Hardenbrook, H. Howard, and A. Anderson. 2009. Using GPS and GIS to quantify site-specific dust generation during pre- and post-Stryker transformation maneuvers at Pohakuloa Training Area, Hawaii. Presented at the Sustainable Range Program Conference, Indianapolis, IN. Howard, H., and P. D. Ayers. 2009. Addressing cumulative impacts on military lands. Paper presented at the Sustainable Range Program Conference, Indianapolis, IN. Howard, H., L. Rew, P. D. Ayers, H. Balbach, and A. Anderson. 2009. Tracking military vehicles to better understand invasive species spread. Presented at the ASA Conference, Pittsburgh, PA. Howard, H., P. D. Ayers, A. Anderson, B. Horner, and P. Sullivan. 2009. Cumulative assessment of military vehicle impacts on training lands: utilization of Army tracking systems and mobility models. Paper presented at the 11th European Regional Conference of the International Society for Terrain-Vehicle Systems, Bremen, Germany. Kane, J. R.*, P. D. Ayers, H. Howard, and A. Anderson. 2009. Vehicle dynamics and terrain impacts across multiple passes. Presented at the ASA Conference, Pittsburgh, PA. Liu, K.*, P. D. Ayers, H. Howard, and A. Anderson. 2009. Multi-pass rutting study for turning wheeled and tracked vehicles. 11th European Regional Conference of the International Society for Terrain-Vehicle Systems, Bremen, Germany. Liu, K.*, P. D. Ayers, J. R. Kane, H. Howard, and A. Anderson. 2009. Multi-pass Rutting Study for Turning Wheeled and Tracked Vehicles. ASABE International Conference, Paper #09-5874. McConkey, J. B.*, P. D. Ayers, J. R. Candlish, K. W. Swinson, S. Bakaletz, and R. Emmott. 2009. Georeferenced riverine habitat mapping (surface and bathymetric) Big South Fork National River and Recreation Area. ASABE Annual International Meeting. Anderson, A, P. D. Ayers, and G. Siebert. 2008. Assessing the impact of mission changes on sustaining installation natural resources. Poster presented at the Partners in Environmental Technology Technical Symposium and Workshop, Washington D.C. Poster presented at the Partners in Environmental Technology Technical Symposium and Workshop, Washington D.C. Ayers, P. D. 2008. Assessing Florida and Hawaii coral reef ecosystem health using GPS-based underwater video mapping system. Presented at the 11th International Coral Reef Symposium, Ft. Lauderdale, FL. Ayers, P. D., H. Howard, A. Anderson, H. Duncan, A. J. McLemore, and R. E. Messer. 2008. Evaluation of tactical GPS tracking data for estimating military vehicle/terrain impacts. Proceeding of the 16th International Conference of the ISTVS, Turin, Italy. Ayers, P. D., H. Howard, A. Anderson, N. S. Potteti, A. J. McLemore, and H. Duncan. 2008. Vehicle terrain impact prediction using tactical GPS tracking during military exercises. 2008 ASA meeting, Houston, TX. Ayers, P. D., H. Howard, and A. Anderson. 2008. Using tactical GPS vehicle tracking data for military land management. 2008 ASA meeting, Poster presentation, Houston, TX. Howard, H., L. Rew, P. D. Ayers, H. Balbach, and A. Anderson. 2008. Tracking military vehicles to better understand invasive species spread. Conference Proceedings of the 16th International Conference of the ISTVS, Turin, Italy. . Liu, K., P. D. Ayers, H. Howard, A. Anderson, and R. Jones. 2008. Prediction of rut depth during military vehicle turning maneuvers using a modified soil numeric. ASABE Conference, Providence, RI. Anderson, A., H. Howard, P. D. Ayers, G. Wang, G. Gertner, and P. Woodford. 2007. Assessing Vehicles Impacts At U. S. Army Installations. Presentation at the 2007 ASA meeting in New Orleans, LA, 2007 ASA meeting in New Orleans, LA. Anderson, A., P. D. Ayers, G. Wang, G. Gertner, H. Howard, and S. Fang. 2007. Assessing Vehicle Impacts At Multiple Scales On US Army Installation, Example Using Fort Riley, Kansas. Paper No. 2007-41-0427. Proceedings of the Joint North America, Asia-Pacific ISTVS Conference, Fairbanks, AK. Ayers, P. D., K. Liu, H. Howard, A. Anderson, P. Woodford, and Q. Li. 2007. Soil Rutting From Turning Wheeled And Tracked Vehicles In Wet And Dry Soil Conditions At Fort Riley Military Installation. ASA meeting in New Orleans, LA. Ayers, P. D., M. K. Rice, L. Randolph, A. Anderson, and H. Howard. 2007. Determining Vegetative Impacts From Stryker Exercises At Fort Lewis Military Installation. SRP Workshop, Hampton VA. Ayers, P. D., M. K. Rice, Q. Li, H. Howard, and A. Anderson. 2007. Modeling Military Vehicle Terrain Impacts. Paper No. 2007-41-0528 Proceedings of the Joint North America Asia-Pacific ISTVS Conference Fairbanks AK. Ayers, P. D., N. S. Potteti, D. Faucette, H. Howard, and A. Anderson. 2007. Dust Generation From Stryker Transformation at Pohakuloa Training Area. SRP Workshop Hampton VA. Ayers, P. D., R. E. Messer, and R. Curry. 2007. Underwater Video Mapping For Assessing And Monitoring Coral Reef Ecosystem Health. Geotool '07 Conference Myrtle Beach, SC. Howard, H., P. D. Ayers, and K. J. Simmons. 2007. Vegetative Recovery Rates After Military Training. Paper No. 2007-41-0225 Proceedings of the Joint North America Asia-Pacific ISTVS Conference Fairbanks AK. Liu, K., P. D. Ayers, H. Howard, and A. Anderson. 2007. Influence Of Turning Radius On Military Vehicle Induced Rut Formation. Paper No. 2007-41-0326 Proceedings of the Joint North America Asia-Pacific ISTVS Conference Fairbanks AK. Potteti, N. S., P. D. Ayers, H. Howard, A. Anderson, and D. Faucette. 2007. Quantifying Dust Generation From Pre And Post Stryker Transformation At Pohakuloa Training Area. ASA meeting in New Orleans, LA. Ayers, P. D. 2005. Modification and Evaluation of Continuous Roll Prediction Model for Front Drive Mowers. ASAE Paper No. 05-5003. Ayers, P. D. 2005. The Application of Video Mapping Systems for Research and Monitoring of Ecosystems. 16th Annual SAMAB Conference, Cherokee NC. Ayers, P. D., A. Anderson, H. Howard, and C. B. Richmond. 2005. Vehicle Impact Study at Camp Atterbury. 14th Annual Integrated Training Area Management Workshop, Indianapolis, IN. Ayers, P. D., and A. Anderson. 2005. The Effects of Speed and Turning Radius on Terrain Impact Severity of Off-road Vehicles. ASAE Paper No. 05-1023. Ayers, P. D., and A. B. Anderson. 2005. Fort Riley Wet vs. Dry Vehicle Impact Study. ASA-CSA-SSSA Annual Meeting, Salt Lake City, UT. Ayers, P. D., and J. Liu. 2005. Evaluation of Engineering Plastic for Rollover Protective Structures (ROPS) Mounting. ASAE Paper No. 05-5007. Ayers, P. D., C. D. Butler, C. Otto, A. Anderson, and P. Woodford. 2005. Evaluating Military Vehicle Impacts at Fort Riley. 14th Annual Integrated Training Area Management Workshop, Indianapolis, IN. Ayers, P. D., C. D. Butler, C. Otto, A. Anderson, and P. Woodford. 2005. Comparing Wet and Dry Impacts at Fort Riley. Presented at the 14th Annual Integrated Training Area Management Workshop, Indianapolis, IN. 14th Annual Integrated Training Area Management Workshop, Indianapolis, IN. Ayers, P. D., H. Howard, A. Anderson, and Q. Li. 2005. Evaluation of Low Impact Military Tires. 24th Annual Meeting and Conference on Tire Science and Technology, Akron, OH. Wu, C., P. D. Ayers, and A. Anderson. 2005. Influence of Travel Directions on the GPS Dynamic Accuracy for Vehicle Tracking. ASAE Paper No. 05-1088. Affleck, R. T., and S. Shoop., and P. D. Ayers. 2004. Disturbance From Off-Road Vehicle During Spring Thaw. Proceeding of the 12th ASCE International Winter Construction Symposium and Expo on Cold Regions Engineering, Edmonton, Alberta, May 16-19. Affleck, R. T., S. Shoop, K. J. Simmons, P. D. Ayers, and A. Anderson. 2004. Measurement of Disturbance and Recovery of Seasonal Terrain. ASA/CSA/SSA Annual Meetings, Seattle, WA, 31 Oct - 4 Nov. Anderson, A., P. D. Ayers, and W. R. Ochsner. 2004. Predicting Vegetation Loss Associated with Off-road Vehicle Use. Presented at the 2004 ASA/CSA/SSA Annual Meetings, Seattle, WA, 31 Oct - 4 Nov. Ayers, P. D. 2004. Georeferenced Video Mapping of Mussel Habitat in the Big South Fork National River and Recreation Area (BISO). Presented at the 15th Annual South Appalachian Man and the Biosphere Conference. Gatlinburg, TN, Nov 16 and 17. Ayers, P. D., J. Logan, and G. V. Melnichenko. 2004. Potential Sources of Non-Point Sediment Pollution in the Little River, Blount County, Tennessee. Proc. 14th Ann. Tenn. Water Res. Symp. 31 Mar 2 Apr, 2004. Burns, TN. pp. P23. Ayers, P. D., X. Wang, R. S. Comer, and W. B. Marsh. 2004. Lateral Upset Tests to Evaluate Tip-Over Protective Structure (TOPS) Performance. National Symposium of Agricultural Health and Safety (and National Institute for Farm Safety), Keystone Resort, Colorado June 20-24. Butler, C., and P. D. Ayers. 2004. Digital mapping of Invasive And Endangered Plant Species at the Obed Wild and Scenic River. Presented at the 15th Annual South Appalachian Man and the Biosphere Conference. Gatlinburg, TN, Nov 16 and 17. Liu, J., and P. D. Ayers. 2004. Effect of High Speed on ROPS Design. Presented at the 2004 National Symposium of Agricultural Health and Safety (and National Institute for Farm Safety), Keystone Resort, Colorado June 20-24. Wu, C., P. D. Ayers, and A. Anderson. 2004. Evaluation of Autonomous and Differential GPS for Multipass Vehicle Tracking Identification. ASAE Paper No. 04-1061. ASAE, St. Joseph MI 49085. Wu, C., P. D. Ayers, and A. B. Anderson. 2004. GIS and Neural Network Method for Potential Road Location for Military Land Management. ASAE Paper No. 04-1148. ASAE, St. Joseph MI 49085. Wu, C., P. D. Ayers, P. Nissen, and A. Anderson. 2004. Identifying Newly Formed Trails for GPS Vehicle Tracking during Field Training Exercises. Presented at the Thirteenth Annual ITAM Workshop. San Francisco, CA August 16-20. Affleck, R. T., S. Shoop, A. Anderson, and P. D. Ayers. 2003. Maneuver Analysis for Army Training Lands. Poster presented at the 2003 ASA-CSA-SSSA Annual Meeting, Denver, CO. Ayers, P. D., A. B. Anderson, and C. Wu. 2003. Analysis of Vehicle Use Pattern During Field Training Exercises. Presented at the 2003 ASA-CSA-SSSA Annual Meeting and ISTVS Symposium, Denver, CO. (invited) Ayers, P. D., and X. Wang. 2003. Model Evaluation for New ASAE S547 Lateral Upset Test. ASAE 2003 Section Meeting Paper, Chattanooga, TN. Ayers, P. D., J. B. Conger, R. S. Comer, P. Troutt, and A. Fiscor. 2003. Stability Analysis of Agricultural Off-Road Vehicles. ASAE Paper No. 03-8006. ASAE, St. Joseph, MI 49085. Comer, R. S., P. D. Ayers, J. B. Conger, P. Troutt, and X. Wang. 2003. Evaluation of ASAE Standard S547 for the Continuous Roll Testing On Larger Lawnmowers. ASAE Paper No. 03-8005. ASAE, St. Joseph, MI 49085. Fiscor, A., P. D. Ayers, and T. Cheung. 2003. GPS-Based Mapping of Natural Resources Using Georeferenced Video. Presented at the 14th Annual SAMAB Conference, Asheville, NC. Howard, H., P. D. Ayers, V. Morrill, W. Ochsner, D. Franklin, M. McLeod, L. Qinghe, A. Fiscor, and P. Troutt. 2003. Laboratory and Field Comparison of Low Impact Tires. Poster presented at the 2003 ASA-CSA-SSSA Annual Meeting, Denver, CO. Li, Q, C. Wu, P. D. Ayers, and A. B. Anderson. 2003. Soil and Vegetation Disturbance of Turning Tracked and Wheeled Off-Road Vehicles. ASAE Paper No. 03-1055. ASAE, St. Joseph MI 49085. Simmons, K. J., P. D. Ayers, A. B. Anderson, A. Fiscor, and A. Lombardie. 2003. Vegetative Recovery of Military Vehicle Impacts at Fort Lewis, Washington In Comparison To Recovery Studies at Different Sites. Presented at the 2003 ASA-CSA-SSSA Annual Meeting, Denver, CO. Ayers, P. D., J. B. Conger, R. Comer, and P. Trout. 2002. ROPS Design and Testing for Off-Road Utility Vehicles and Lawnmowers. Proceeding of the 2002 NIFS Conference, Ponte Vedra Beach, Florida, 24-27 June 2002. Ayers, P. D., S. M. Legoza, M. P. Peel, M. E. Field, S. A. Cochran, and B. L. Lanzendorf. 2002. UVMS For Coral Reef Ecosystem Mapping and Species Distribution Analysis. Proceedings of the Seventh International Conference on Remote Sensing for Marine and Coastal Environments, Miami, Florida, 20-22 May 2002 . Haugen, L. B., P. D. Ayers, A. B. Anderson, and P. E. Nissen. 2002. Using GPS to Evaluate Vehicle Movement Patterns and Impacts during Training Maneuvers. Proceedings of the 14th International Conference of the International Society for Terrain-Vehicle Systems (ISTVS). Ayers, P. D., and J. Liu. 2001. ROPS Design and Testing for Agricultural Tractors. ASAE Paper No. 01-8034. ASAE, St. Joseph MI 49085. Pierce, R. A., and P. D. Ayers. 2001. Evaluation of Deposition and Application Accuracy of a Pulse Width Modulation Variable Rate Field Sprayer. ASAE Paper No. 01-1077. ASAE, St. Joseph MI 49085. Schleicher, T. D., W. C. Bausch, J. A. Delgado, and P. D. Ayers. 2001. Evaluation and Refinement of the Nitrogen Reflectance Index (NRI) For Site-Specific Fertilizer Management. ASAE Paper No. 01-1151. ASAE, St. Joseph MI 49085. Ayers, P. D., and E. Anglund. 2000. Field Evaluation of a Variable-Rate Liquid Chemical Application. ASAE Paper No. 00-1157. ASAE, St. Joseph MI 49085. Ayers, P. D., and S. Legoza. 2000. DGPS-Based Underwater Mapping for Monitoring and Managing Coastal Ecosystems. Proceedings of the Sixth International Conference on Remote Sensing for Marine and Coastal Environments, Charleston, SC. Ayers, P. D., J. Liu, J. Hocheder, L. Haugen, and S. Legoza. 2000. GPS-Based Video Mapping for Natural Resource Management. Proceeding of the Second International Conference on Geospatial Information in Agriculture and Forestry, Lake Buena Vista, FL. Ayers, P. D., J. Liu, L. Haugen, and S. Legoza. 2000. Mapping Natural Resources Using Georeferenced Video. Proceedings of the First Annual VMS 200 Users Conference: Beyond the GIS Horizon, Trends in Multimedia Mapping, Estes Park, Colorado. Ayers, P. D., L. Haugen, M. Vance, and A. Anderson. 2000. Using GPS for Vehicle Tracking and Dynamic Property Monitoring. ASAE Paper No. 00-1071. ASAE, St. Joseph MI 49085. Haugen, L., P. D. Ayers, M. Vance, and A. Anderson. 2000. Using GPS for Off-Road Vehicle Tracking and Environmental Impacts. Proceeding of the 8th European Conference of ISTVS. Umea, Sweden. Liu, J., and P. D. Ayers. 2000. ROPS Design and Dynamic Deflection with Prevention Effectiveness Evaluation. Proceedings of the NIFS Conference, Dubuque, IA. Liu, J., P. D. Ayers, and N. Geng. 2000. Database Modeling Of Agricultural Machinery Safety and Production Based On Integrating GPS/GIS and VMS Technology. ASAE Paper No. 00-1106. ASAE, St. Joseph MI 49085. Ayers, P. D., and S. Legoza. 1999. GPS-Based Underwater Video Mapping and Application for Coral Reef Management. Proceeding of the 1999 South Pacific Applied Geoscience Commission Meeting, Nadi, Fiji. Liu, J., and P. D. Ayers. 1999. Dynamic Tractor Stability Index. Proceeding of the 1999 National Institute for Farm Safety Conference, Ocean City, Md. Liu, J., P. D. Ayers, and M. Vance. 1999. Off-Road Vehicle Stability Mapping Integrating GPS/GIS and Video Technology. ASAE Paper No. 99-7047. ASAE, St. Joseph MI 49085. Flikkema, K. A., and P. D. Ayers. 1998. Direct Nozzle Injection and its Effects on Spray Distribution. ASAE Paper No. 98-1006. ASAE, St. Joseph MI 49085. Ayers, P. D. 2013. ROPS and stability research forum: review of US activity. OECD ROPS and Stability Research Forum., Bologna, Italy. (invited) Ayers, P. D., A. B. Anderson, and C. Wu. 2003. Analysis of Vehicle Use Pattern During Field Training Exercises. Presented at the 2003 ASA-CSA-SSSA Annual Meeting and ISTVS Symposium, Denver, CO. (invited) Theses/Dissertations completed by directed students Hensley, K.* 2014. Estimating streambank erosion using GPS-based watershed-scale video mapping and USEPA BANCS fro the development of sediment TMDLs. M.S. Thesis. Bozdech, G.* 2012. A GPS-based Mobility Power Model for Military Vehicle Applications. M.S. Thesis. Connell, B.* 2012. GIS-based Streambank Video Mapping to Determine Erosion Susceptible Areas. MS Thesis. Swinson, K.* 2012. Analysis of Georeferenced Sonar-based Thalweg and Cross-Sectional River Depth. M.S. Thesis. Candlish, J. R.* 2010. Aquatic Habitat Mapping within the Obed Wild and Scenic River (OBRI) for Threatened and Endangered Species Habitat Delineation. M.S. Thesis. Kane, J.* 2010. Terrain Impacts from Vehicle Operations Across Multiple Passes. MS Thesis. McConkey, B.* 2010. Georeferenced Riverine Habitat Mapping in the Big South Fork National River and Recreation Area. MS Thesis. Potteti, N. S.* 2009. Quantifying Dust Emissions from Pre and Post Transformation at Pohakuloa Training Area, Hawaii. M.S. Thesis, Masters Thesis. Rice, M. K.* 2006. Using GPS and GIS to evaluate military vehicle traffic patterns for the prediction of vegetation removal. M.S. Thesis. Simmons, K. J.* 2004. Vegetative Recovery of Military Vehicle Impacts at Fort Lewis, WA. M.S. Thesis. Zheng, M., B. G. Leib, D. M. Butler, P. D. Ayers, and D. G. Hayes. 2017. Natural ventilation models and production management in an experimental high tunnel. Ph.D. Dissertation. Liu, K.* 2010. Influence of Turning on Military Vehicle Induced Rut Formation. Ph.D. Dissertation. Wu, C.* 2005. Analysis of Vehicle Use Patterns During Military Field Exercises to Identify Potential Roads. Ph.D. Dissertation. |