Publications
- Smith, T.R.; Bosanac, N,Ìý‘Motion Primitive Approach to Spacecraft Trajectory Design in a Multi-Body System,’ September 2023, Vol. 70, No. 34, The Journal of Astronautical Sciences, DOI: [Open Access manuscript at link]
- Bonasera, S; Bosanac, N, 'Computing Natural Transitions Between Tori Near Resonances in the Earth-Moon System,' March 2023, Vol. 46, No. 3, pp. 443-454,ÌýJournal of Guidance, Control, and Dynamics, DOI:Ìý [Accepted manuscript]
- Sullivan, C.J.; Bosanac, N; Anderson, R.L.,Ìý'Designing Low-Thrust Transfers near Earth-Moon L2 via Multi-Objective Reinforcement Learning,' March 2023, Vol. 60, No. 2, Journal of Spacecraft and Rockets. DOI: Ìý°ÚAccepted manuscript]
- Bonasera, S; Bosanac, N; Sullivan, C; Elliott, I; Ahmed, N; McMahon, J, 'Designing Sun-Earth L2 Halo Orbit Stationkeeping Maneuvers via Reinforcement Learning,' February 2023, Vol. 46, No. 2, Journal of Guidance, Control, and Dynamics, DOI:Ìý [Accepted manuscript]
- Elliott, I; Bosanac, N, 'Describing Relative Motion near Periodic Orbits via Local Toroidal Coordinates,' April 2022, Vol. 134, No. 19, Celestial Mechanics and Dynamical Astronomy, DOI:ÌýÌý°ÚAccepted manuscript]
- Smith, T.R; Bosanac, N, 'Constructing Motion Primitive Sets to Summarize Periodic Orbit Families and Hyperbolic Invariant Manifolds in a Multi-Body Systems,' February 2022, Vol. 134, No. 7,ÌýCelestial Mechanics and Dynamical Astronomy, DOI:ÌýÌý°ÚAccepted manuscript]
- Bonasera, S; Bosanac, N, 'Applying Data Mining Techniques to Higher-Dimensional Poincaré Maps in the Circular Restricted Three-Body Problem,' November 2021, Vol. 133, No. 51,ÌýCelestial Mechanics and Dynamical Astronomy, DOI:Ìý. [Accepted manuscript]
- Sullivan, C; Stuart, J; Anderson, R.L.; Bosanac, N, 'Designing Low-Thrust Transfers to High-Inclination Science Orbits via Hybrid Optimization,' September 2021, Vol. 58, No. 5,ÌýJournal of Spacecraft and Rockets, DOI: Ìý°ÚAccepted manuscript]
- Elliott, I; Sullivan, C; Bosanac, N; Stuart, J; Alibay, F, 'Designing Low-Thrust Trajectories for a SmallSat Mission to Sun-Earth L5,' October 2020, Vol. 43, No. 10, pp. 1854-1864, Journal of Guidance, Control and Dynamics, DOI: Ìý°ÚAccepted manuscript]
- Bosanac, N, 'Data Mining Approach to Poincaré Maps in Multi-Body Trajectory Design,' June 2020, Vol. 43, No. 6, pp. 1190-1200, Journal of Guidance, Control and Dynamics, DOI:ÌýÌý°ÚAccepted manuscript]
- Bosanac, N; Webster, C.M.; Howell, K.C.; Folta, D.C., 'Trajectory Design for the Wide Field Infrared Survey Telescope Mission,' September 2019, Vol. 42, No. 9, pp. 1899-1911, Journal of Guidance, Control and Dynamics, DOI:ÌýÌý
- Bosanac, N; Cox, A; Howell, K.C.; Folta, D.C., 'Trajectory Design for a Cislunar CubeSat Leveraging Dynamical Systems Techniques: The Lunar IceCube Mission,'ÌýMarch, 2018, Vol. 144, pp. 283-296, Acta Astronautica, DOI:
- Guzzetti, D; Bosanac, N; Haapala, A; Howell, K.C.; Folta, D.C., 'Rapid Trajectory Design in the Earth-Moon Ephemeris System via an Interactive Catalog of Periodic and Quasi-Periodic Orbits,'ÌýSeptember-October 2016, Volume 126, pp. 439-455, Acta Astronautica, DOI:
- Bosanac, N; Howell, K.C; Fischbach, E, 'A Natural Autonomous Force Added in the Restricted Problem and Explored via Stability Analysis and Discrete Variational Mechanics,' February 2016, Volume 361, No. 49, Astrophysics and Space Science. DOI:
- Bosanac, N; Howell, K.C; Fischbach, E, 'Stability of Orbits Near Large Mass Ratio Binary Systems,' May 2015, Volume 122, pp. 27-52, Celestial Mechanics and Dynamical Astronomy. DOI:
- Folta, D.C; Bosanac, N; Guzzetti, D; Howell, K.C, 'An Earth-Moon System Trajectory Design Reference Catalog,' May-June 2015, Volume 110, pp. 341-353, Acta Astronautica. DOI:
- Folta, D.; Bosanac, N.; Elliott, I.L.; Mann, L.; Mesarch, R.; Rosales, J., 2022, "Astrodynamics Convention and Modeling Reference for Lunar, Cislunar, and Libration Point Orbits (Version 1.1)",ÌýNASA/TP–20220014814 [pdf][]
Linn, T., Bhaskaran, S., Bosanac, N., Feaga, L., Jenkins, S., "Report of the Autonomous Navigation Demonstration Relevance Assessment Team (ANDRAT)", Study funded by NASA Science Mission Directorate, August 2024 [pdf][]
- Bruchko, K.L., 'Trajectory Design Using Sampling-Based Kinodynamic Planning in Multi-Body Systems', Ph.D. Dissertation, ²ÊÃñ±¦µä, August 2024. [pdf]
- Smith, T.R., 'Using Motion Primitives to Rapidly Design Trajectories in Multi-Body Systems', Ph.D. Dissertation, ²ÊÃñ±¦µä, May 2023. [pdf]
- Bonasera, S, 'Incorporating Machine Learning into Trajectory Design Strategies in Multi-Body Systems,'ÌýPh.D. Dissertation, ²ÊÃñ±¦µä, May 2022. [pdf]
- Elliott, I, 'Relative Trajectory Design and Control near Periodic Orbits in Multi-Body Systems using Local Toroidal Coordinates,'ÌýPh.D. Dissertation, ²ÊÃñ±¦µä, May 2022. [pdf]
- Sullivan, C, 'Low-Thrust Trajectory Design in Multi-Body Systems via Multi-Objective Reinforcement Learning,'ÌýPh.D. Dissertation, ²ÊÃñ±¦µä, May 2022. [pdf]
- Bosanac, N, 'Leveraging Natural Dynamical Structures to Explore Multi-Body Systems,'ÌýPh.D. Dissertation, Purdue University, August 2016.
- Sullivan, C;ÌýBosanac, N; Anderson, R; Mashiku, A; Stuart, J.R., ‘Exploring Transfers between Earth-Moon Halo Orbits via Multi-Objective Reinforcement Learning,’ÌýIEEE Aerospace Conference, March 2021, Virtual.
- Bosanac, N; Alibay, F; Stuart, J.R., 'A Low-Thrust-Enabled SmallSat Heliophysics MissionÌýto Sun-Earth L5,'ÌýIEEE Aerospace Conference, March 2018, Big Sky, MT. [pdf]
- Miceli, G.E.; Bosanac, N.; Karimi, R., 'Generating the Trajectory Design Space for Neptunian System Exploration' 2024 AAS/AIAA Astrodynamics Specialist Conference, August 2024, Broomfield, CO. [pdf]
- Bosanac, N.; Joyner, M., 'Data-Driven Summary of Continuous Thrust Trajectories in a Low-Fidelity Model of Cislunar Space,' 2024 AAS/AIAA Astrodynamics Specialist Conference, August 2024, Broomfield, CO. [pdf]
- Bosanac, N., 'Curvature Extrema Along Trajectories in the Circular Restricted Three-Body Problem,' 2024 AAS/AIAA Astrodynamics Specialist Conference, August 2024, Broomfield, CO. [pdf]
- Miceli, G.E.; Bosanac, N.; Stuart, J.R.; Alibay, F., ‘Motion Primitive Approach to Spacecraft Trajectory Design in the Neptune-Triton System,’ AIAA SciTech Forum and AAS/AIAA Space Flight Mechanics Meeting, January 2024. [pdf]
- Bosanac, N, ‘Data-Driven Summary of Natural Spacecraft Trajectories in the Earth-Moon System,’ 2023 AAS/AIAA Astrodynamics Specialist Conference, August 2023, Big Sky, MT. [pdf]
- Miceli, G; Bosanac, N; Mesarch, M.A.; Folta, D.C.; Mesarch, R.L., ‘Clustering Approach To Identifying Low Lunar Frozen Orbits In A High-Fidelity Model,’ 2023 AAS/AIAA Astrodynamics Specialist Conference, August 2023, Big Sky, MT.Ìý°Úpdf]
- Spear, R.L., Bosanac, N, ‘Data-Driven Categorization of Spacecraft Motion with Uncertainty in the Earth-Moon System’ 2023 AAS/AIAA Astrodynamics Specialist Conference, August 2023, Big Sky, MT. [pdf]
- Bruchko, K; Bosanac, N, ‘Rapid Trajectory Design In Multi-Body Systems Using Sampling-Based Kinodynamic Planning,’ 2023 AAS/AIAA Astrodynamics Specialist Conference, August 2023, Big Sky, MT. [pdf]
- Bruchko, K; Bosanac, N, 'Adaptive Roadmap Generation for Trajectory Design in the Earth-Moon System', 33rd AIAA/AAS Space Flight Mechanics Meeting, Austin, TX, January 2023. [pdf]
- Smith, TR; Bosanac, N, ‘A Motion Primitive Approach to Trajectory Design in a Multi-Body System,’ AAS/AIAA Astrodynamics Specialist Conference, August 2022, Charlotte, NC. [pdf]
- Bruchko, K; Bosanac, N, ‘Designing Spatial Transfers in Multi-Body Systems using Roadmap Generation,’ AAS/AIAA Astrodynamics Specialist Conference, August 2022, Charlotte, NC. [pdf]
- Sullivan, C.J.; Bosanac, N; Anderson, R.L.; Mashiku, A.K., 'Exploring the Low-Thrust Transfer Design Space in an Ephemeris Model via Multi-Objective Reinforcement Learning,'Ìý32nd AIAA/AAS Space Flight Mechanics Meeting at the AIAA Scitech Forum, San Diego, CA, January, 2022 []
- Elliott, I; Bosanac, N, 'Characterizing Natural Relative Motion of Formations on Invariant Tori in Multi-Body Systems,'Ìý32nd AIAA/AAS Space Flight Mechanics Meeting at the AIAA Scitech Forum, San Diego, CA, January, 2022 []
- Boone, S; Bonasera, S; McMahon, J.W.; Bosanac, N;ÌýAhmed, N.R., 'Incorporating Observation Uncertainty into Reinforcement Learning-Based Spacecraft Guidance Schemes,' 32nd AIAA/AAS Space Flight Mechanics Meeting at the AIAA Scitech Forum, San Diego, CA, January, 2022 []
- Rivera, K.P; Marsillach, D.A; Holzinger, M.J; Elliott, I; Bosanac, N, ‘Patterns of Life and Maneuver Detection for Cislunar Trajectory Maintenance,’ Advanced Maui Optical and Space Surveillance Technologies Conferences, September, 2021.
- Bosanac, N; Bonasera, S; Sullivan, C; McMahon, J; Ahmed, N, ‘Reinforcement Learning for Reconfiguration Maneuver Design in Multi-Body Systems,’ AAS/AIAA Astrodynamics Specialist Virtual Conference, August 2021.Ìý
- Bruchko, K; Bosanac, N, ‘A Preliminary Exploration of Path Planning for Initial Guess Construction in Multi-Body Systems,’ AAS/AIAA Astrodynamics Specialist Virtual Conference, August 2021.Ìý°Úpdf]
- Smith, T.R; Bosanac, N, ‘Using Motion Primitives to Design Libration Point Orbit Transfers in the Earth-Moon System,’ AAS/AIAA Astrodynamics Specialist Virtual Conference, August 2021.Ìý°Úpdf]
- Sullivan, C; Bosanac, N; Mashiku, A.; Anderson, R.L., ‘Multi-Objective Reinforcement Learning for Low-Thrust Transfer Design between Libration Point Orbits,’ AAS/AIAA Astrodynamics Specialist Virtual Conference, August 2021. [pdf]
- Elliott, I; Bosanac, N, ‘A Geometric Approach to the Impulsive Control of Spacecraft Formations near Invariant Tori,’ AAS/AIAA Astrodynamics Specialist Virtual Conference, August 2021. [pdf]
- Bonasera, S; Elliott, I; Sullivan, C;ÌýBosanac N; Ahmed, N; McMahon, J; ‘Designing Impulsive Station-Keeping Maneuvers Near a Sun-Earth L2 Halo Orbit via Reinforcement Learning’ AAS/AIAA Space Flight Mechanics Meeting,ÌýFebruary 2021. [pdf]
- Elliott I; Bosanac N, ‘Spacecraft Formation Control Near a Periodic Orbit Using Geometric Relative Coordinates’ AAS/AIAA Space Flight Mechanics Meeting, February 2021. [pdf]
- Bonasera, S.; Bosanac, N, 'Unsupervised Learning to Aid Visualization of Higher-Dimensional Poincarè Maps in Multi-Body Trajectory Design,'Ìý2020 AAS/AIAA Astrodynamics Specialist Virtual Conference, August 2020. [pdf]
- Smith, T.; Bosanac, N, 'Motion Primitives Summarizing Periodic Orbits and Natural Transport Mechanisms in the Earth-Moon System,'Ìý 2020 AAS/AIAA Astrodynamics Specialist Virtual Conference, August 2020. [pdf]
- Bonasera, S.; Bosanac, N, 'Transitions Between Quasi-Periodic Orbits Near Resonances in the Circular Restricted Three-Body Problem,' 2020 AAS/AIAA Astrodynamics Specialist Virtual Conference, August 2020. [pdf]
- Sullivan, C.; Bosanac, N, 'Using Multi-Objective Deep Reinforcement Learning to Uncover a Pareto Front in Multi-Body Trajectory Design,'Ìý 2020 AAS/AIAA Astrodynamics Specialist Virtual Conference, August 2020. [pdf]
- Elliott, I.; Bosanac, N, 'Geometric Relative Orbital Element Set for Motion Near a Periodic Orbit with Oscillatory Modes,'Ìý 2020 AAS/AIAA Astrodynamics Specialist Virtual Conference, August 2020. [pdf]
- Short, C; Haapala, A.; Bosanac, N, 'Technical Implementation of the Circular Restricted Three-Body Model in STK Astrogator,'Ìý 2020 AAS/AIAA Astrodynamics Specialist Virtual Conference, August 2020. [pdf]
- Bonasera, S.; Bosanac, N, 'Applications of Clustering to Higher-Dimensional PoincaréÌýMaps in Multi-Body Systems,' 30th AIAA/AAS Space Flight Mechanics Meeting, January 2020, Orlando, FL. [pdf]
- Elliott, I; Bosanac, N; Ahmed, N; McMahon, J.W., 'ApprenticeshipÌýLearning for Maneuver Design in Multi-Body Systems,' Ìý30th AIAA/AAS Space Flight Mechanics Meeting, January 2020, Orlando, FL. [pdf]
- Sullivan, C; Bosanac, N, 'Using Reinforcement Learning to Design Low-Thrust Approaches into Periodic Orbits in a Multi-Body System,' 30th AIAA/AAS Space Flight Mechanics Meeting, January 2020, Orlando, FL. [pdf]
- Smith, T.R.; Bosanac, N, 'Constructing a Set of Motion Primitives in the Circular Restricted Three-Body Problem via Clustering,' AAS/AIAA Astrodynamics Specialist Conference, August 2019, Portland, ME. [pdf]
- Smith, T.R.; Bosanac, N; Berger, T.E., Duncan, N; Wu, G,Ìý'Trajectory Design for a Solar Polar Observing Constellation,' AAS/AIAA Astrodynamics Specialist Conference, August 2019, Portland, ME. [pdf]
- Stuart, J.R.; Anderson, R.L.; Sullivan, C; Bosanac, N,Ìý'Accessing Highly Out-of-Ecliptic Science Orbits via Low-Energy, Low-Thrust Transport Mechanisms,' AAS/AIAA Astrodynamics Specialist Conference, August 2019, Portland, ME. [pdf]
- Elliott, I;ÌýSullivan, C; Bosanac, N; Alibay, F; Stuart, J, 'Designing Low-Thrust Enabled Trajectories for A Heliophysics SmallSat Mission to Sun-Earth L5,'Ìý29th AAS/AIAA Spaceflight Mechanics Meeting, January 2019, Ka'anapali,ÌýHI. [pdf]
- Sullivan, C; Elliott, I;ÌýBosanac, N; Alibay, F; Stuart, J, 'Exploring the Low-Thrust Trajectory Design Space for SmallSat Missions to the Sun-Earth Triangular Equilibrium Points,'Ìý29th AAS/AIAA Spaceflight Mechanics Meeting, January 2019, Ka'anapali,ÌýHI. [pdf]
- Bosanac, N, 'A Data Mining Approach to Using Poincaré Maps in Multi-Body Trajectory Design Strategies,'Ìý29th AAS/AIAA Spaceflight Mechanics Meeting, January 2019, Ka'anapali,ÌýHI. [pdf]
- Bosanac, N, 'Bounded Motions Near Resonant Orbits in the Earth-Moon and Sun-Earth Systems,' AAS/AIAA Astrodynamics Specialist Conference, August 2018, Snowbird, UT.Ìý
- Bosanac, N; Webster, C.M; Howell, K.C; Folta, D.C, 'Trajectory Design and Station- Keeping Analysis for the Wide Field Infrared Survey Telescope Mission,'ÌýAAS/AIAA Astrodynamics Specialist Conference, August 2017, Stevenson, WA. [pdf]
- Bosanac, N; Cox, A; Howell, K.C.; Folta, D, 'Trajectory Design for a Cislunar CubeSat Leveraging Dynamical Systems Techniques: The Lunar IceCube Mission,'Ìý27th AAS/AIAA Space Flight Mechanics Meeting, February 2017, San Antonio, TX.Ìý°Úpdf]
- Folta, D; Bosanac, N; Cox, A; Howell, K.C., 'The Lunar IceCube Mission Challenge: Attaining Science Orbit Parameters From a Constrained Approach Trajectory,'Ìý27th AAS/AIAA Space Flight Mechanics Meeting, February 2017, San Antonio, TX.Ìý°Úpdf]
- Folta, D; Webster, C.M; Bosanac, N; Cox, A; Guzzetti, D; Howell, K.C, 'Trajectory Design Tools for Libration and Cislunar Environments,' 6th International Conference on Astrodynamics Tools and Techniques, March 2016, Darmstadtium, Germany.Ìý°Úpdf]
- Cox, A; Bosanac, N; Guzzetti, D; Howell, K.C; Folta, D; Webster, C.M, 'An Interactive Trajectory Design Environment Leveraging Dynamical Structures in Multi-Body Regimes,' 6th International Conference on Astrodynamics Tools and Techniques, March 2016, Darmstadtium, Germany.Ìý°Úpdf]
- Folta, D; Bosanac, N; Cox, A; Howell, K.C, 'The Lunar IceCube Mission Design: Construction of Feasible Transfer Trajectories with a Constrained Departure,' AAS/AIAA Space Flight Mechanics Meeting, February 2016, Napa Valley, CA.Ìý°Úpdf]
- Guzzetti, D; Bosanac, N; Haapala, A; Howell, K.C; Folta, D.C, 'Rapid Trajectory Design in the Earth-Moon Ephemeris System via an Interactive Catalog of Periodic and Quasi-Periodic Orbits,' 66th International Astronautical Congress, October 2015, Jerusalem, Israel.Ìý°Úpdf]
- Bosanac, N; Howell, K.C; Fischbach, E, 'Leveraging Discrete Variational Mechanics to Explore the Effect of an Autonomous Three-Body Interaction Added to the Restricted Problem,' AstroNet-II International Final Conference, June 2015, Tossa De Mar, Spain. []
- Bosanac, N; Howell, K.C; Fischbach, E, 'A Natural Autonomous Force Added in the Restricted Problem and Explored Via Stability Analysis and Discrete Variational Mechanics,' AAS/AIAA Space Flight Mechanics Meeting, January 2015, Williamsburg, VA.Ìý°Úpdf]
- Guzzetti, D; Bosanac, N; Howell, K.C, 'A Framework for Efficient Trajectory Comparisons in the Earth-Moon Design Space,' AIAA/AAS Astrodynamics Specialist Conference, August 2014, San Diego, CA.Ìý°Úpdf]
- Bosanac, N; Howell, K.C; Fischbach, E, 'Stability of Orbits Near Large Mass Ratio Binary Systems,' 2nd IAA Conference on Dynamics and Control of Space Systems, March 2014, Rome, Italy.Ìý°Úpdf]
- Folta, D.C; Bosanac, N; Guzzetti, D; Howell, K.C, 'An Earth-Moon System Trajectory Design Reference Catalog,' 2nd IAA Conference on Dynamics and Control of Space Systems, March 2014, Rome, Italy.Ìý°Úpdf]
- Capparelli, E; Delgado-López, L; Bosanac, N; Burg, A; Conley, J; Ho, K; Kugler, J; Langston, S.M; Lo Gatto, V; Mansurov, O.G; Nizenkov, P; Vrolijk, A; Zea, L; Battat, J.A, 'Evaluating International Collaboration for Human Exploration Beyond LEO,' IAA Space Exploration Conference, January 2014, Washington D.C. [pdf]
- Bosanac, N; Howell, K; Fischbach, E, 'Exploring the Impact of a Three-Body Interaction Added to the Gravitational Potential Function in the Restricted Three-Body Problem,' AAS/AIAA Space Flight Mechanics Meeting, February 2013, San Diego, CA.Ìý°Úpdf]
- Peña Mercadé, T., 'Optimal Low-Thrust Trajectories to Solar System Bodies' Masters Thesis, ²ÊÃñ±¦µä, May 2024. []
- Hernandez, D., 'Designing Trajectories to Uranus Using Particle Swarm Optimization', Masters Thesis, ²ÊÃñ±¦µä, December 2023. []
- Patel, R., ‘Low Thrust Transfers Between Periodic Orbits in the Earth-Moon Circular Restricted Three-Body Problem,’ Masters Thesis, ²ÊÃñ±¦µä, May 2023. []
- Hevia, G., ‘Low Thrust Optimal Trajectories in the Circular Restricted Three-Body Problem,’ Masters Thesis, ²ÊÃñ±¦µä, May 2023. []
- Joyner, M., 'Exploring the Geometry of Departure Trajectories from an Earth-Moon Near Rectilinear Halo Orbit,'ÌýMasters Thesis, ²ÊÃñ±¦µä, August 2022. []
- Johnstone, R.C., 'Designing Optimal Low-Thrust Interplanetary Trajectories Utilizing Monotonic Basin Hopping,'ÌýMasters Thesis, ²ÊÃñ±¦µä, May 2022.Ìý°Ú]
- Spear, R, 'Planar Heteroclinic Connections in the Neptune-Triton Circular Restricted Three Body Problem,'ÌýMasters Thesis, ²ÊÃñ±¦µä, August 2021.Ìý°Ú]
- Thangavelu, C,Ìý'Transfers between Near Rectilinear Halo Orbits and Low Lunar Orbits,'ÌýMasters Thesis, ²ÊÃñ±¦µä, December 2019.Ìý°Ú]
- Chikine, S, 'Low-thrust Trajectory Optimization in the Circular Restricted Three Body Problem,'ÌýMasters Thesis, ²ÊÃñ±¦µä, August 2019. []
- Huber, B, 'Designing High Thrust, Interplanetary Trajectories Using the NeuroEvolution of Augmenting Topologies (NEAT) Algorithm,'ÌýMasters Thesis, ²ÊÃñ±¦µä, May 2019. []
- Bosanac, N, 'Exploring the Influence of a Three-Body Interaction Added to the Gravitational Potential in the Circular Restricted Three-Body Problem: A Numerical Frequency Analysis,' Masters Thesis, Purdue University, December 2012.
- Berger, T., Duncan, N., Van Cleve, J., Shannon, M., Bosanac, N., Elliott, I.L, Smith, T.R., Sullivan, C.J., Upton, L., Baker, D., Thayer, J.,Cranmer, S., Pankratz, C., Hurlburt, N., "The Solar Polar Observing Constellation (SPOC) Mission: Combining Operational Full-Sun Magnetic Field Measurements with Polar Exploration," presented at American Geophysical Union Meeting in Washington, D.C., December 2018.
- Bosanac, N, 'Enabling and Enhancing Planetary Exploration via Trajectory Design,'ÌýOuter Planets Assessment Group Meeting, February 2018Ìý[pdf]Ìý(The poster file is not accessible to screen readers: please contact me if you would like to know about this research poster)