Publications

Journal Papers

Written in English

(2022)

    • Y. Kim and J. Ahn, “Multi-disciplinary and Multi-objective Design Optimization of a Lunar Rover System with Operational Considerations”, International Journal of Aeronautical and Space Sciences. Vol. 23, No.1, 2022, pp.192-206.
    • S. Lee, & J. Ahn, “Cost Estimation of Earth Observation Satellites Based on Technology-Aware Complexity and Cost Adjustment”, International Journal of Aeronautical and Space Sciences, Vol. 23, No.2, 2022, pp.379-391.
    • S Han, J Ahn, MJ Tahk, “Analytical Staring Attitude Control Command Generation Method for Earth Observation Satellites”, Journal of Guidance, Control, and Dynamics, Vol. 45, No.7, 2022. pp. 1347-1356.
    • J. Hwang and J. Ahn, “Integrated Optimal Guidance for Reentry and Landing of a Rocket Using Multi-Phase Pseudo-Spectral Convex Optimization”, International Journal of Aeronautical and Space Sciences, Vol. 23, No.4, 2021. pp. 766-774.
    • E. Choi and J. Ahn, “Optimal Planetary Surface Routing Considering Exploration Values and Synergies”, Journal of Aerospace Information Systems, Vol. 19, No. 6, 2022, pp. 406-420.
    • J. Lee and J. Ahn, “Sensitivity-based solution down-selection for multi-objective optimization problems considering parameter variations”, Engineering Optimization, 2022.(Online Published)
    • H. Ha and J Ahn, “Moment-Based Mass Estimation Relationship for Initial Sizing of Fixed-Wing Unmanned Aerial Vehicles”, International Journal of Aeronautical and Space Sciences, 2022.(Online Published)
    • B. Jo and J. Ahn, “Optimal staging of reusable launch vehicles for minimum life cycle cost”, Aerospace Science and Technology. Vol. 127, 2021. 107703

(2021)

    • B. Jo and J. Ahn, “Noniterative feedback midcourse guidance for exo-atmospheric interception of ballistic targets using virtual impact point steering”, Aerospace Science and Technology. Vol. 119, 2021. 107159
    • B. Cho, B. Jo and J. Ahn, “Integrated Framework for Staging and Trajectory Optimization of a Launch Vehicle Considering Range Safety Operations”,  International Journal of Aeronautical and Space Sciences. Vol. 22, No.4, 2021. pp. 963-973.
    • J. Kim and J. Ahn, “Integrated Framework for Task Scheduling and Attitude Control of Multiple Agile Satellites”, Journal of Aerospace Information Systems. Vol. 18, No.8, 2021. pp. 539-552.
    • S,Kim, B. Jo, E. Choi, S. Cho and J. Ahn, “Procedure and methodologies for managing the risk of space object reentry”, Advances in Space Research. Vol. 67, No.6, 2021. pp. 1844-1858.
    • B. Jo and J. Ahn, “Optimal staging of reusable launch vehicles considering velocity losses”, Aerospace Science and Technology. Vol. 109, 2021. 106431.

(2020)

    • S. Park and J. Ahn, “Deep neural network approach for fault detection and diagnosis during startup transient of liquid-propellant rocket engine”, Acta Astronautica, Vol. 177, 2020. pp. 714-730
    • E. Suh, K. Shinha and J. Ahn, “Multi-attribute optimization-based system decomposition considering several value chain stakeholder perspectives”, Research in Engineering Design, Vol.31, No.4, 2020, pp. 411–428.
    • S. Ann, S. Lee, Y. Kim and J. Ahn. “Midcourse Guidance for Exoatmospheric Interception Using Response Surface Based Trajectory Shaping.” IEEE Transactions on Aerospace and Electronic Systems, Vol.56, No.5, 2020. pp. 3655-3673
    • J. Lee, B. Jo, G. Moon, M. Tahk and J. Ahn, “Intercept Point Prediction of Ballistic Missile Defense Using Neural Network Learning”, International Journal of Aeronautical and Space Sciences, Vol.21, No.4, 2020, pp. 1092–1104.
    • J. Kim, J. Ahn,  H. Choi and D. Cho, “Task Scheduling of Agile Satellites with Transition Time and Stereoscopic Imaging Constraints”, Journal of Aerospace Information Systems, Vol. 17, No.6, 2020. pp. 285-293
    • U. Choi, T. Sung and J. Ahn, “Adaptive Experimental Design for Aerodynamic Modeling with Hard-to-Change Factors”, Journal of Aerospace Information Systems, 1-11.
    • U. Choi, J. Kim and J. Ahn, “Cost-Aware Adaptive Design of Experiment with Nonstationary Surrogate Model for Wind Tunnel Testing”, International Journal of Aeronautical and Space Sciences, Vol.21, No.3, 2020, pp. 670–680.
    • B. Jo, J. Ahn and W. Rho, “Instantaneous Impact Point Guidance Considering Uncertainty in Engine Cut-off Time”, Journal of Guidance Control and Dynamics, Vol. 43, No.2, 2020. pp. 373-382
    • U. Choi and J. Ahn, “Imitation Learning-Based Unmanned Aerial Vehicle Planning for Multitarget Reconnaissance Under Uncertainty”, Journal of Aerospace Information System, Vol. 17, No.1, 2020. pp. 36-50

(2019)

    • Y. Kim, J. Lee and J. Ahn, “Innovation towards sustainable technologies: A socio-technical perspective on accelerating transition to aviation biofuel”, Technological Forecasting and Social Change. Vol. 145, 2019. pp. 317-329.
    • S. Kim, B. Jo, E. Choi, S. Cho, J. Ahn, “Two-phase framework for footprint prediction of space object reentry”, Advances in Space Research, Vol. 64, No.4, 2019. pp. 824-835.
    • S. Son, J. Kim, J. Lee and J. Ahn, “Improving supply chain management process using design structure matrix based cross-functional analysis,” System Engineering. Vol. 22, No.4, 2019. pp. 313-329.
    • J. Ahn, P. Wang, Y. Guo, and B. Wie, “Optimal Terminal-Time Determination for the ZEM/ZEV Feedback Guidance Law,” Astrodynamics, Vol.3, No.2, 2019, pp. 127-136.
    • W. Park, Y. Jung, H. Bang, and J. Ahn, “Robust Crater Triangle Matching Algorithm for Planetary Landing Navigation,” Journal of Guidance, Control, and Dynamics. Vol. 42, No.2, 2019. pp. 402-410.
    • D. Lee and J. Ahn, “Vehicle Routing Problem with Vector Profits with Max-Min Criterion,” Engineering Optimization, Vol.51, No.2, 2019. pp. 352-367.

(2018)

    • S. Ann, N. Cho, Y. Kim, S. Shin, and J. Ahn, “Response Surface Modeling-Based Analysis on Launch Vehicle Capability,” Advances in Space Research, Vol. 62, No.12, 2018, pp. 3281-3297.
    • D-H. Cho, J. Kim, H.-L. Choi, and J. Ahn, “Optimization-Based Scheduling Method for Agile Earth-Observing Satellite Constellation,” Journal of Aerospace Information Systems, Vol. 15, No. 11, 2018, pp. 611-626.
    • H. Na and J. Ahn, “Framework to Operate Multiple Ship Defense Missiles under Uncertain Evasive Maneuvers of target,”Proceedings of the Institution of Mechanical Engineers, Part G, Journal of Aerospace Engineering, Vol.232, No.11, 2018, pp. 2001–2018.
    • J. Ahn, M. Choi, and E. Suh, “Entropy Based System Assessment Metric for Determining Architecture’s Robustness to Different Stakeholder Perspectives,” Systems Engineering,  Vol. 21, No. 10, 2018, pp. 476-489.
    • B. Jo and J. Ahn, “New Formulation for Time Derivatives of Instantaneous Impact Point Based on Geometric Decomposition,”Journal of Aerospace Engineering, Vol.31, No.4, 2018.
    • J. Lee, S. Lee, J. Ahn, and H. Choi, “Pareto Front Generation with Knee-Point Based Pruning for Mixed Discrete Multi-Objective Optimization,” Structural and Multidisciplinary Optimization, Vol.58, No.2, 2018, pp. 823–830.
    • G. Oh, J. Park, J. Park, H. Lee, Y. Kim, J. Ahn, S. Cho, J. Kim, and S. Shin, “Load Relief Control of Launch Vehicle Using Aerodynamic Angle Estimation,” Proceedings of the Institution of Mechanical Engineers, Part G, Journal of Aerospace Engineering, Vol.232, No.8, 2018, pp. 1598–1605.
    • B. Jo and J. Ahn, “Near Time-Optimal Feedback Instantaneous Impact Point (IIP) Guidance Law for Rocket,”Aerospace Science and Technology, Vol.76, 2018. pp. 523-529.
    • J. Bang and J. Ahn, Two-phase framework for near-optimal multi-target Lambert rendezvous,” Advanced in Space Research, Vol. 61, 2018, pp. 1273-1285.
    • Y. Choi, and J. Ahn, “Earned Value Management Considering Technical Readiness Level and Its Application to New Space Launcher Program,” International Journal of Aeronautical and Space Sciences, Vol.19, No.1, 2018, pp. 227–231.
    • D. Lee and J. Ahn, “Integrated Optimization of Planetary Rover Layout and Exploration Routes,” Engineering Optimization, Vol. 50, No. 1, 2018, pp. 164-182.

(2017)

    • G. Oh, Y. Kim, J. Ahn, and H. Choi, “Market-Based Distributed Multi-UAV Task Assignment Algorithm for Cooperative Timing Missions,” Journal of Aircraft, Vol. 54, No. 6, 2017, pp. 1-13.
    • S. Son, J. Kim, and J. Ahn, “Design Structure Matrix Modeling of a Supply Chain Management System Using the Biperspective Group Decision,” IEEE Transactions on Engineering Management, Vol. 64, No. 2, 2017, pp. 220-233.
    • D. Lee and J. Ahn, “Integrated Optimization of Planetary Rover Layout and Exploration Routes,” Engineering Optimization, Vol. 50, No. 1, 2017, pp. 164-182.
    • G. Oh, Y. Kim, J. Ahn, and H. Choi, “Market-Based Task Assignment for Cooperative Timing Missions in Dynamic Environments,” Journal of Intelligent and Robotic Systems, Vol. 87, No. 1, 2017, pp. 97-123.
    • J. Kim and J. Ahn, “Modeling and Optimization of a Reluctance Accelerator Using DOE-Based Response Surface Methodology,” Journal of Mechanical Science and Technology, Vol. 31, No. 3, 2017, pp. 1321-1330.
    • J. Kim, Y. Kwon, E. Suh, and J. Ahn, “Modeling and Optimization of a Reluctance Acceleratond Actual System Design Effort,” Journal of Mechanical Design, Vol. 139, No. 1, 2017, 034501.
    • B. Wie and J. Ahn, “On Selecting the Correct Root of Initial Orbit Determination Equations of Laplace and Gauss,” Journal of Astronautical Sciences, Vol. 64, No. 1, 2017, pp. 50-71.

(2016)

    • M. Tahk, S. Han, B. Lee, and J. Ahn, “Perch Landing Assisted by Thruster (PLAT): Concept and Trajectory Optimization,” International Journal of Aeronautical and Space Sciences, Vol. 17, No. 3, 2016, pp. 378-390.
    • D. Lee, H. Jin, H. Shim, J. Ahn, and H. Choi, “Two-Phase Experimental Design with Adaptive Subspacing for Wind Tunnel Testing Based Aerodynamic Modeling,” Journal of Mechanical Science and Technology, Vol. 30, No. 11, 2016, pp. 5041-5050.
    • Y. Nam, T. Seong, and J. Ahn, “Adjusted Instantaneous Impact Point and New Flight Safety Decision Rule,” Journal of Spacecraft and Rockets, Vol. 53, No. 4, 2016, pp. 766-773.
    • G. Kim, Y. Kwon, E. Suh, and J. Ahn, “Managing Architectural Complexity of Product Family and Platform,” Journal of Mechanical Design, Vol. 138, No. 7, 071401, 2016.
    • S. Lee, J. Ahn, and J. Bang, “Dynamic Selection of Zero-Revolution Lambert Algorithms Using Performance Comparison Map,” Aerospace Science and Technology, Vol. 51, 2016, pp. 96-105.
    • B. Yoon and J. Ahn, “Trajectory Optimization of a Launch Vehicle with Explicit Instantaneous Impact Point Constraints for Various Range Safety Requirements,” ASCE Journal of Aerospace Engineering, Vol. 29, No. 3, 2016.
    • BJ. Jeon, J. Bang, B. G. Park, J. Ahn, and M. J. Tahk, “Guidance Scheme for Operating Ship Defense Missiles with Dual Seekers,” Proceedings of the Institution of Mechanical Engineers, Part G, Journal of Aerospace Engineering, Vol. 230, No. 4, 2016, pp. 601-614.

(2015)

    • J. Moon, D. Lee, T. Lee, J. Ahn, J. Shin, K. Yoon, and D. Choi, “Group Decision Procedure to Model the Dependency Structure of Complex Systems: Framework and Case Study for Critical Infrastructures,” Systems Engineering, Vol. 18, No. 4, 2015, pp. 323-338.
    • B. Jeong, D. Lee, H. Shim, J. Ahn, H. Choi, S. Park, and S. Oh, “Yaw-Control Spoiler Design Using Design of Experiments Based Wind Tunnel Testing,” Journal of Aircraft, Vol. 52, No. 2, 2015, pp. 713-718.
    • J. Ahn, J. Bang, and S. Lee, “Acceleration of Zero-Revolution Lambert’s Algorithms Using Table-Based Initialization,” Journal of Guidance, Control, and Dynamics, Vol. 38, No. 2, 2015, pp. 335-342.
    • S. Hong, J. Ahn, and H. Choi, “Pruning-Based Pareto Front Generation for Mixed-Discrete Bi-Objective Optimization,” Structural and Multidisciplinary Optimization, Vol. 51, No. 1, 2015, pp. 193-198.

(2014)

    • S. Hong, H. Na, and J. Ahn, “Assessment of Architectural Options for a Dual-Mode Disaster Monitoring Constellation Supported by On-Orbit Propellant depots,” Proceedings of the Institution of Mechanical Engineers, Part G, Journal of Aerospace Engineering, Vol. 228, No. 11, 2014, pp. 2108-2122.
    • J. Ahn, O. de Weck, and M. Steele, “Credibility Assessment of Models and Simulations Based on NASA’s Models and Simulation Standard Using the Delphi Method,” Systems Engineering, Vol. 17, No. 2, 2014, pp. 237-248.
    • J. Ahn and W. Roh, “Analytic Time Derivatives of Instantaneous Impact Point,” Journal of Guidance, Control, and Dynamics, Vol. 37, No. 2, 2014, pp. 383-390.

(2013)

    • J. Ahn and S. Lee, “Lambert Algorithm Using Analytic Gradients,” Journal of Guidance, Control, and Dynamics,Vol. 36, No. 6, 2013, pp. 1751-1761.
    • J. Ahn and J. Seo, “Instantaneous Impact Point Prediction Using the Response Surface Method,” Journal of Guidance, Control, and Dynamics, Vol. 36, No. 4, 2013, pp. 958-966.

(2012)

    • J. Ahn, O. de Weck, Y. Geng, and D. Klabjan, “Column Generation Based Heuristics for a Generalized Location Routing Problem with Profits Arising in Space Exploration,” European Journal of Operational Research, Vol. 223, No. 1, 2012, pp. 47-59.
    • J. Ahn and W. Roh, “A Noniterative Instantaneous Impact Point Prediction Algorithm for Launch Operations,”Journal of Guidance, Control, and Dynamics, Vol. 35, No. 2, 2012, pp. 645-648.

(~ 2010)

    • J. Ahn and O. de Weck, “Mars Surface Exploration Caching from an Orbiting Logistics Depot,” Journal of Spacecraft and Rockets, Vol. 47, No. 4, 2010, pp. 690-694.
    • J. Ahn, O. de Weck, and J. Hoffman, “An Optimization Framework for Global Planetary Surface Exploration Campaigns,” Journal of the British Interplanetary Society, Vol. 61, No. 12, 2008, pp. 487-498.
    • P. Wooster, R. Braun, J. Ahn, and Z. Putnam, “Mission Design Options for Human Mars Missions,” The International Journal of Mars Science and Exploration, Vol. 3, 2007, pp. 12-28.

 

Journal Papers Written in Korean

(2022)

    • S. Kim, J. Lee, EJ Choi, S. Cho, J. Ahn., “Dual-Mode Framework for Space Object Collision Risk Assessment”, Journal of Space Technology and Applications, Vol. 2, No.1, 2022, pp.13-29.

(2021)

    • C. Moon and J. Ahn, “Markov Decision Process-based Potential Field Technique for UAV Planning”, Journal of the Korean Society for Industrial and Applied Mathmatics, Vol. 25, No. 4, pp. 149-161.
    • D. Lee, H. Kwon, D. Lee, H. Lee, Y. Jung, J. Jeong, S. Park, S. Lee, J. Park, M. Tahk, H. Bang, J. Ahn.,  “Performance Analysis of an Integrated Navigation of an Airborne AESA Radar”, KSAS Journal, Vol. 49, No. 4, 2021, pp. 281-290 (Written in Korean).

(2020)

    • D. Lee, J. Im, H. Lee, Y. Jung, J. Jeong, J. Shin, S. Lee, J. Park and J. Ahn,, “Modeling and Simulation of Aircraft Motion for Performance Assessment of Airborne AESA Radar Considering Wind and Vibration,” KSAS Journal, Vol. 48, No. 11, 2020, pp. 903-910 (Written in Korean).

(2019)

    • J. Lee and J. Ahn, “A Multi-Objective Optimization Framework for Conceptual Design of a Surface-to-Surface Missile System,” KSAS Journal, Vol. 47, No. 6, 2019, pp. 460-467 (Written in Korean).

(2018)

    • U. Choi, J. Lee, H. Song, T. Sung, G. Park, and J. Ahn, “A Study on Adaptive Design of Experiment for Sequential Free-fall Experiments in a Shock Tunnel,” KSAS Journal, Vol. 46, No. 10, 2018, pp. 798-805.

(2017)

    • B. Jo and J. Ahn, “Optimization-Based Determination of Apollo Guidance Law Parameters for Korean Lunar Lander,” KSAS Journal, Vol. 45, No. 8, 2017, pp. 662-670 (Written in Korean).
    • J. Ko, S. Park, J. Ko, H. Choi, J. Ahn, S. Lee, D. Lee, and J. Yoon, “Implementation of Airborne Multi-Function Radar including attitude maneuvering,” Journal of Korean Institute of Electromagnetic Engineering and Science, Vol. 28, No. 3, 2017, pp. 225-236. (Written in Korean).

(2016)

    • D. Lee, H. Jin, J. Ahn, and Y. Lee, “Pitching Moment Coefficient Modeling of KF-16 Using Adaptive Design of Experiments with Cost Consideration,” KSAS Journal, Vol. 44, No. 6, 2016, pp. 537-543 (Written in Korean).

(2015)

    • H. Kim and J. Ahn, “Mass Management Methods for Aerospace Vehicle Development,” Current Industrial and Technological Trends in Aerospace, Vol. 13, No. 2, 2015, pp. 150-160 (Written in Korean).
    • S. Hong and J. Ahn, “Trend Analysis Based Strategic Evaluation of Launch Vehicle Industry in Korea,” KSAS Journal, Vol. 43, No. 10, 2015, pp. 936-942 (Written in Korean).
    • H. Kim and J. Ahn, “Characterizing System Integration and Test Discrepancies in the Spacecraft Development,” Current Industrial and Technological Trends in Aerospace, Vol. 13, No. 1, 2015, pp. 87-95 (Written in Korean).
    • S. Jeong, D. Jang, H. Park, T. Seong, and J. Ahn, “Optimal Path Planning and Analysis for Maximization of Multi-UAs Survivability for Missions Involving Multiple Threats and Locations,” KSAS Journal, Vol. 43, No. 6, 2015, pp. 488-496.
    • H. Jin, H. Shim, D. Lee, J. Ahn, H. Choi, and S. Oh, “An Experimental Study for Construction of Static Aerodynamics Database of KF-16 based on Design of Experiments,” KSAS Journal, Vol. 43, No. 5, pp. 422-431 (Written in Korean).

(~ 2010)

    • W. Roh, H. Cho, J. Ahn, J. Park, and H. Choi, “R&D of the inertial navigation system (INS) for KSR-III and its flight test results,” Journal of Institute of Control, Robotics and Systems, Vol. 10, No. 6, pp. 557-565, June 2004 (Written in Korean).
    • J. Ahn, W. Roh, J. Park, and G. Cho, “Performance analysis and flight results of KSR-III,” KSAS Journal, Vol. 32, No. 1, pp. 106-111, Mar. 2004 (Written in Korean).
    • J. Ahn, W. Roh, S. Kim, S. Kim, and J. Kim, “Launch criteria design and wind operations for KSR-III flight test,” KSAS Journal, Vol. 32, No. 2, pp. 103-109, Mar. 2004 (Written in Korean).
    • W. Roh, H. Cho, J. Ahn, and H. Choi, “Attitude controller design and flight test of KSR-III,” KSAS Journal, Vol. 32, No. 3, pp. 88-94, Apr. 2004 (Written in Korean).
    • J. Ahn, W. Roh, H. Cho, and J. Park, “Control system modeling and optimal bending filter design for KSR-III first stage,” KSAS Journal, Vol. 30, No. 7, pp. 113-122, Oct. 2002 (Written in Korean).
    • J. Ahn, W. Roh, J. Park, and G. Cho, “Instantaneous impact point calculation algorithm of a sounding rocket and its application to range safety system,” KSAS Journal, Vol. 28, No. 6, pp. 86-93, Sep. 2000 (Written in Korean).
    • J. Ahn, T. Lee, and Y. Kim, “Real-time formulation of missile trajectory optimization using the parameter optimization technique,” KSAS Journal, Vol. 27, No. 4, pp. 94-103, June 1999 (Written in Korean).
    • H. Kim, K. Kim, J. Ahn, Y. Kim, W. Choi, “Design and verification of KOMPSAT roll attitude control system,” Journal of Institute of Control, Robotics and Systems, Vol. 5, No. 3, pp. 370-378, Apr. 1999 (Written in Korean).

Conference Papers

(Conference Papers Written in English)

    • J. Lee and J. Ahn., “Poincaré Filter for Trajectory Design in Multi-body Regime”, AIAA SciTech 2021 Forum, San Diego, California, USA, Jan. 03-07, 2021.
    • D. Lee, D. Lee and J. Ahn., “Prediction of Multiple Aerodynamic Coefficients of Missiles using CNN”, AIAA SciTech 2021 Forum, San Diego, California, USA, Jan. 03-07, 2021.
    • D. Lee, J. Lee and J. Ahn., “Optimal Multi-target Rendezvous by Using Multi-layer Elementary Solutions”, AIAA SciTech 2021 Forum, San Diego, California, USA, Jan. 03-07, 2021.
    • J. Lee and J. Ahn., “Successive Optimization Framework for Weak Stability Boundary Trajectory Design”, 2021 ASCEND,  Las Vegas, NV, USA, Nov 15-17, 2021
    • J. Hwang and J. Ahn., “Integrated Optimal Guidance for Reentry and Landing of a VTVL Rocket Using Multi-phase Pseudo-spectral Convex Optimization”, Asia-Pacific International Symposium on Aerospace Technology, Jeju, South Korea, Nov. 15-17, 2021.
    • D. Lee and J. Ahn. “Design Optimization of Space Tug Using Hybrid Propulsion.” Asian Congress of Structural and Multidisciplinary Optimization 2020, Nov 23-25. 2020.
    • T. Sung and J. Ahn. “Preliminary Study on Conceptual Design of Satellite Launch Vehicle with Satellite Constellation Deployment Strategy.” Asian Congress of Structural and Multidisciplinary Optimization 2020, Nov 23-25. 2020.
    • B. Jo and J. Ahn. “Midcourse Guidance Algorithm for Return to Launch Site of Reusable Rockets.” 2020 ASCEND,  Las Vegas, NV, USA, Nov 16-18, 2020
    • J. Lee and J. Ahn. “Homotopic Approach of Free-final-time Continuous-low-thrust Trajectory Optimization.” 2020 AAS/AIAA Astrodynamics Specialist Virtual Lake Tahoe Conference, USA, Aug 09-12, 2020.
    • J. Kim, and J. Ahn. “Task and attitude control scheduling of multiple agile satellites considering task-dependent transition time.” AIAA Scitech 2020 Forum, Orlando, Florida, USA, Jan 06-11 , 2020.
    • B. Jo, and J. Ahn. “Cut-Off Insensitive Guidance Algorithm for Instantaneous Impact Point (IIP) change of Rocket.” AIAA Scitech 2019 Forum, San Diego, California, USA, Jan 07-11, 2019.
    • S. Jeong, U. Choi, and J. Ahn. “Distributed Clustering Algorithm for UAV Systems.” AIAA Scitech 2019 Forum, San Diego, California, USA, Jan 07-11,  2019.
    • U. Choi, J. Kim, Y. Lee, and J. Ahn. “Adaptive Design of Experiment based on Gaussian Process Models with Nonstationary Kernel Applied to Wind Tunnel Testing.” 31st Congress of the International Council of the Aeronautical Sciences. International Council of the Aeronautical Sciences, 2018.
    • N. Yoon, and J. Ahn. “Optimal Landing Guidance of Reusable Launch Vehicle.” The Asian Congress of Structural and Multidisciplinary Optimization (ACSMO) 2018. The Asian Congress of Structural and Multidisciplinary Optimization, 2018.
    • S. Kim, E. Choi, S .Cho, and J. Ahn, “Reentry prediction simulation of Tiangong-1 using STK and DRAMA”, 2017 BIEN, Seoul, Korea, Sep, 2017.
    • H. Jin, D. Lee, J. Lee, J. Ahn, “Hyperparameters optimization for adaptive design of experiment applied to wind tunnel testing,” 30th Congress of the International Council of the Aeronautical Sciences, DCC, Daejeon, Korea, Sept. 2016.
    • J. Bang and J. Ahn, “Optimal Multi-Target Lambert Rendezvous,” AIAA SPACE 2016, Long Beach, CA, Sept. 2016.
    • G. Oh, Y. Kim, J. Ahn, and H. Choi. “PSO-based optimal task allocation for cooperative timing missions.” 20th IFAC Symposium on Automatic Control in Aerospace 2016, Sherbrooke, Quebec, Canada, Aug. 2016.
    • S. Han, M. Hwang, B. Lee, J. Ahn, and M. Tahk.  “Analytic Solution of Projectile Motion with Quadratic Drag and Unity Thrust,” 20th IFAC Symposium on Automatic Control in Aerospace 2016, Sherbrooke, Quebec, Canada, Aug. 2016.
    • M. Tahk, S. Han, B. Lee, and J. Ahn, “Trajectory Optimization and Control Algorithm of Longitudinal Perch Landing Assisted by Thruster,” 2016 European Control Conference, Aalborg, Denmark, Jun. 2016.
    • B. Wie and J. Ahn, “On Selecting the Correct Root of Initial Orbit Determination Equations of Laplace and Gauss,” 26th AAS/AIAA Space Flight Meeting, Napa, CA, USA, Feb. 2016.
    • J. Ahn, Y. Guo, and B. Wie, “Precision ZEM/ZEV Feedback Guidance Algorithm Utilizing Vinti’s Analytic Solution of Perturbed Kepler Problem,” 26th AAS/AIAA Space Flight Meeting, Napa, CA, USA, Feb. 2016.
    • Y. Choi, S. Jin, J. Ahn, “Earned Value Management Considering Technical Readiness Level for New Launch Vehicle Development,” 66th International Astronautical Congress, Jerusalem, Israel, Oct. 2015.
    • H. Kim and J. Ahn, “Testing for Verification and Validation of COMS Satellite,” APCOSEC 2015, Seoul, Republic of Korea, Oct. 2015.
    • S. Hong, and J. Ahn, “Optimal Expenditure Planning for R&D of a Space System,” 9th Asia-Pacific Conference on Systems Engineering, Seoul, Korea, Oct. 2015.
    • T. Seong and J. Ahn, “Application of Operational Framework for a Dual-Mode Disaster Monitoring Constellation,” APCOSEC 2015, Seoul, Republic of Korea, Oct. 2015.
    • S. Hong and J. Ahn, “Scenario Planning Based Strategy Development for Launch Vehicle Industry in Korea,” Space 2015, Pasadena, CA, USA, Aug. 2015.
    • G. Oh, Y.Kim, J Ahn, and H. Choi, “Market-based task assignment for cooperative timing missions over networks with limited connectivity,” AIAA Guidance, Navigation, and Control Conference, FL, USA, Jan. 2015.
    • S. Lee and J. Ahn, “Threat plane method for developing operational rules of an autonomous anti-air defense system on a naval ship against multiple attacking missiles,” AIAA Guidance, Navigation, and Control Conference 2015, FL, USA, Jan. 2015.
    • H. Park, S. Jeong, and J. Ahn, “Design of a multiple-UAS mission model using activity-based modeling,” International Conference on Control, Automation, and Systems (ICCAS) 2014, Seoul, South Korea, Oct. 2014.
    • D. Lee, J. Ahn, and S. -Y. Oh, “Response surface smoothing for wind tunnel testing based on design of experiment with subspace partitioning,” International Conference on Control, Automation, and Systems (ICCAS) 2014, Seoul, South Korea, Oct. 2014 (accepted).
    • H. Park and J. Ahn, “Quantification of Sustainability of Space Industry using Value Network Model,” International Astronautical Congress (IAC) 2014, Toronto, Canada, Oct. 2014.
    • N. Yoon and J. Ahn, “Trajectory optimization of launch vehicle considering instantaneous impact point,” International Astronautical Congress (IAC) 2014, Toronto, Canada, Oct. 2014.
    • J. Moon, D. Lee, T. Lee, J. Ahn, “Dependency Structure Modeling Framework Using Expert Survey Based Group Decision,” 16th International DSM Conference, Paris, France, July. 2014.
    • L. Choi, J. Ahn, and D. -H. Cho, “Information-maximizing adaptive design of experiments for wind tunnel testing,” EngOpt 2014, Lisboa, Portugal, Sept. 2014.
    • J. Moon, D. Lee, T. Lee, and J. Ahn, “Dependency structure modeling framework using expert survey,” DSM Conference 2014, Paris, France, Jul. 2014.
    • N. Yoon, and J. Ahn, “Optimal Systems Architecting for Selecting the Number of Launch Vehicle Stages”, 8th China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems, Gyeongju, Korea, May. 2014.
    • J. Ahn, S. Lee, and J. Bang, “Framework for Performance Comparison of Lambert Algorithms,” 24th AAS/AIAA Space Flight Meeting, Santa Fe, NM, USA, Jan. 2014.
    • S. Hong and J. Ahn, “Architecture Analysis Framework for Space Systems Supported by On-Orbit Refueling,” 24th AAS/AIAA Space Flight Meeting, Santa Fe, NM, USA, Jan. 2014.
    • J. Moon, D. Lee, T. Lee, and J. Ahn, “A framework to model the interdependencies among critical intrastructures using the nominal group technique (NGT),” Asia-Pacific Council on Systems Engineering Conference (APCOSEC) 2013, Yokohama, Japan, Sep. 2013.
    • G. Oh, Y. Kim, and J. Ahn, “Market-based decentralized task assignment for cooperative UAV mission including rendezvous,” 2013 AIAA Guidance, Navigation, and Control Conference, Aug. 2013.
    • B. Jeon, B. Park, H., Na, M. Tahk, and J. Ahn, “Study on guidance methods for the minimization of passive seeker’s interference between multiple missiles,” 2012 JSASS West Branch Annual Conference, Kyushu, Japan, Nov. 2012.
    • S.Hong, J. Ahn, and H. Na, “Cost-benefit analysis of a dual-mode satellite constellation with on-orbit servicing depot,” Space 2012 Conference and Exhibition, Pasadena, CA, USA, Sep. 2012.
    • S. Hong, J. Ahn, and H. Na, “Operation of a dual-mode disaster monitoring constellation supported by an on-orbit supply depot,” International Astronautical Congress 2012, Naple, Italy, Oct. 2012.
    • J. Seo and J. Ahn, “A response surface model for the effects of the atmospheric drag on the Instantaneous Impact Point (IIP) of a rocket,” International Astronautical Congress 2012, Naple, Italy, Oct. 2012.
    • S. Hong and J. Ahn, “Design of the High0Mobility Disaster Monitoring Satellite Constellation Using the Orbiting Depot,” S. Hong, J. Ahn, and H. Na, Space 2011 Conference, Long Beach, CA, USA, Sep. 2011.
    • J. Ahn and O. de Weck, “The vehicle routing problem with profits under collective resource constraints,” 7th World Congress on Structural and Multidisciplinary Optimization, Seoul, Korea, May 2007.
    • E. Gralla, S. Shull, M. Silver, J. Ahn, A. Sidiqqi and O. de Weck , “Remote terrestrial sites as operational / logistics analogy for Moon/Mars bases: The Haughton Mars Project,” SpaceOps 2006 Conference, Rome, Italy, June 2006.
    • P. Wooster, R. Braun, J. Ahn, and Z. Putnam, “Trajectory Options for Human Mars Missions,” AIAA/AAS Astrodynamics Specialist Conference and Exhibit, Keystone, Colorado, Aug. 2006.
    • G. Bounova, J. Ahn, W. Hoffstetter, P. Wooster, R. Hassan, and O. de Weck, “Selection and Technology Evaluation of Moon/Mars Transportation Architectures,” Space 2005 Conference, Long Beach, CA, USA, Aug. 2005.
    • J. Ahn, T. Lee, and Y. Kim, “Real-Time Missile Trajectory Optimization using Parameter Optimization,” JSASS 13th International Sessions in 37th Aircraft Symposium, Tokyo, Japan, Oct. 1999.

(Conference Papers Written in Korean)

    • DU. Lee, DH, Lee and J. Ahn, “Calculation method for generalized coasting time of multi-stage interceptor”, KSAS 2022 Spring Conference, Goseong, Korea, July 2022
    • H. Na, T. Sung and J. Ahn, “Modeling Missile Nose Shape Transformation for Deep Learning Dataset”, KSAS 2022 Spring Conference, Goseong, Korea, July 2022
    • S. Lee, J. Hwang, H. Jeon, C. Lee, J. Ahn, J. Kim, “A Study on Attitude Control for Reusable Launch Vehicles” , KSPE 2021 Fall Conference, Busan, Korea, Nov 2021.
    • S. Kim, J. Lee, E. Choi, S. Jo, J. Ahn, “An analysis of the space object collision risk due to the mega constellation in the LEO region” , KSAS 2021 Fall Conference, Jeju, Korea, Nov 2021
    • S. Kim, J. Lee, E. Choi, S. Jo, J. Ahn, “Space Object Collision Risk Analysis Using Different Orbital Data Sources” , KSSS 2021 Fall Conference, Gyeongju, Korea, Oct 2021
    • S. Kim, J. Lee, E. Choi, S. Jo, J. Ahn, “Dual-mode risk assessment framework for space object collision”, BIEN 2021, Daejeon, August 2021.
    • J. Lee and J. Ahn, “WSB/BLT Trajectory Design using Poincaré Section in GMAT”, KSAS 2021 Spring Conference, Samchuck, Korea, July 2021
    • J. Lee, C. Moon and J.Ahn, “Vehicle Routing Problem with Profits based UAV Path Planning in Urban Air Mobility”, KSAS 2021 Spring Conference, Samchuck, Korea, July 2021
    • J. Hwang and J. Ahn, “Midcourse Guidance laws based on Instantaneous Impact Point considering Final Impact Angle Constraint”, KSAS 2021 Spring Conference, Samchuck, Korea, July 2021
    • D. Lee, C. Moon and J. Ahn, “Reliability Prediction and Assessment of Hoverbike System”, KSAS 2021 Spring Conference, Samchuck, Korea, July 2021
    • C. Moon, U. Choi, D. Lee, D. Yoon, C. Lee and J. Ahn, “A study on the Path Generation and Waypoint Guidance for Autonomous Hoverbike”, KSAS 2021 Spring Conference, Samchuck, Korea, July 2021.
    • J. Lee, S. Kim, E. Choi, S. Jo, J. Ahn, “A Framework for Space Object Collision Risk Analysis Using Pruning Method” , KSSS 2021 Spring Conference, Yeosu, Korea, April 2021
    • S. Kim, T. Sung, E. Choi, S. Jo, J. Ahn, “A Study of the Initial Orbit Determination Performance under a Limited Observation Environment
      ” , KSSS 2021 Spring Conference, Yeosu, Korea, April 2021
    • T. Sung, S. Kim, B. Jo, E. Choi, S. Jo and J. Ahn, “A Study on the Initial Orbit Determination Method using Limited Observational Resources”, KSAS 2020 Fall Conference, Jeju, Korea, November 2020.
      D. Lee and J. Ahn, “Pareto Front Generation for Hybrid Propulsion Spacecraft Rendezvous Optimization”, KSAS 2020 Fall Conference, Jeju, Korea, November 2020.
      J. Hwang and J. Ahn, “Re-entry and Landing Guidance of Vertical-Takeoff Vertical-Landing Reusable launch Vehicle”, KSAS 2020 Fall Conference, Jeju, Korea, November 2020.
      C. Moon, U. Choi and J. Ahn, “Markov Decision Process based Potential field path planning”, KSAS 2020 Fall Conference, Jeju, Korea, November 2020.
    • C. Moon, U. Choi and J. Ahn, “Hierarchical MDP Configuration and Comparison for efficient Mission Planning”, KSAS 2019 Fall Conference, Jeju, Korea, November 2019
    • J. Lee and J. Ahn, “Homotopic Approach of Low-Thrust Orbit Transfer Trajectory Optimization”, KSAS 2019 Fall Conference, Jeju, Korea, November 2019
    • D. Lee and J. Ahn, “Hybrid Propulsion Orbit Transfer Optimization between Coplanar Orbits”, KSAS 2019 Fall Conference, Jeju, Korea, November 2019
    • J. Im and J. Ahn, “Spatiotemporal optimal path planning with grid search algorithm”, KSAS 2019 Fall Conference, Jeju, Korea, November 2019
    • S. Kim, B. Jo, E. Choi, S. Cho and J. Ahn, “Mathematical modeling for risk assessment of reentering space objects”, KSAS 2019 Fall Conference, Jeju, Korea, November 2019
    • U. Choi and J. Ahn, “Multi-UAV Network Design and Mission Planning Based on Block Coordinate Descent Method”, KSAS 2019 Fall Conference, Jeju, Korea, November 2019
    • U. Choi, T. Sung, J. Kim and J. Ahn, “초고속 비행체 실험 구속조건 하의 적응적 실험 계획법” 2019 KIMST Conference, Jeju, Korea, June. 2019.
    • B. Jo and J. Ahn, “Improvement of Instantaneous Impact Point Guidance Law for Return to Launch Site of Reusable Launch Vehicle”, KSAS 2019 Spring Conference, Buan, Korea, April 2019
    • D. Lee, J. Pyo, and J. Ahn, “Conceptual design of Gateway-based cis-lunar tug”, KSAS 2019 Spring Conference, Buan, Korea, April 2019
    • J. Im, D. Lee, H. Lee, H. Lee, Y. Jung, J. Jeong, J. Park, and J. Ahn, “Wind and fuselage vibration considered 6DOF flight simulator development for Active Electronically Scanned Array(AESA) radar testing.” KSAS 2019 Spring Conference, Buan, Korea, April 2019
    • J. Kim, U. Choi, T. Sung, and J. Ahn, “A Study on the Split-plot Design with Adaptive Design of Experiment.” KSAS 2019 Spring Conference, Buan, Korea, April 2019
    • U. Choi, and J. Ahn, “UAV Mission Planning Framework Based on Markov Decision Process.” KCCM 2019, Seoul, Korea, January 2019
    • J. Lee, U Choi, D Lee, J. Ahn, “Wind Tunnel Test System Automation Based on Adaptive Design of Experiment,” 2017 Korea Society for Computational Fluids Engineering, May 2017.
    • S. Kim, E. Choi , S. Cho , J. Ahn, “Re-entry prediction of spacecraft using commercial and open softwares”, KSAS 2017 Fall Conference, Jeju, Korea, November 2016.
    • D. Lee, J. Lee, W. Kang, and J. Ahn, “Adaptive Design of Experiment based Wind Tunnel Experiment System and Modeling Aerodynamic Coefficients,” KSAS Fall Conference, Jeju, Korea, November 2016.
    • U. Choi, S. Jeong, and J. Ahn, “Autonomous Single UAV Reconnaissance Mission Planning in Multi-Base and Multi-Threat Environment Based on Markov Decision Process,” 2016 KSAS Fall Conference, Jeju, Korea, November 2016.
    • B. Jo, and J. Ahn, “Schmitt-Trigger Controller Design of the Lunar Lander by Applying Limit Cycle Analysis,” 2015 KIMST Conference, Jeju, Korea, June. 2016.
    • U. Choi, S. Jeong, and J. Ahn, “Autonomous UAV Mission Planning in Battlefield Environment Using Markov Decision Process,” 2016 Korean Society for Industrial and Applied Mathematics Spring Conference, Korea, May 2016.
    • H. Jin, D. Lee, and J. Ahn, “Application of Adaptive Design of Experiments using Gaussian Process on Wind Tunnel Testing,” 2015 Fall KSAS Conference, Jeju, Korea, Nov. 2015.
    • J. Kim, and J.Ahn, “Comparative Analysis of CAS500’s Stereo Image Acquisition Simulation of the Korean Peninsula using STK,” 2016 KSAS Spring Conference, Sokcho, Korea, April 2016.
    • K. Kim, G. Moon, H. Park, E. Choi, N. Yoon, B. Jeon, J. Ahn, H. Bang, and M. Tahk, “Minimum Time Ascending Trajectory Design of High-Altitude UAV Using Solar Cell Modeling,” 2015 Fall KSAS Conference, Jeju, Korea, Nov. 2015.
    • G. Moon, H. Park, E. Choi, N. Yoon, K. Kim, B. Jeon, J. Ahn, H. Bang, and M. Tahk, “High Altitude Long Endurance UAV Longitudinal Controller Design using Co-Evolutionary Augmented Lagrangian Method,” 2015 Fall KSAS Conference, Jeju, Korea, Nov. 2015.
    • U. Choi, N. Yoon, G. Moon, H. Park, K. Kim, B. Jeon, J. Ahn, H. Bang, and M. Tahk, “Study on Operating Point Selection for Gain Scheduling of HALE UAV,” 2015 Fall KSAS Conference, Jeju, Korea, Nov. 2015.
    • J. Bang and J. Ahn, “Optimal Planning of Rendezvous with Multiple Target Using Particle Swarm Optimization,” 2015 Fall KSAS Conference, Jeju, Korea, Nov. 2015.
    • H. Jin, D. Lee, and J. Ahn, “Application for Wind Tunnel Testing based on Adaptive Design of Experiments using Gaussian Process,” 2015 KSAS Fall Conference, Jeju, Korea, Nov. 2015.
    • S. Hong and J. Ahn, “Optimal Expenditure Planning for R&D of a Launch Vehicle System,” 2015 Fall KSAS Conference, Jeju, Korea, Nov. 2015.
    • B. Jo and J. Ahn, “Guidance and Control Simulation of the Lunar Lander during the powered descent phase,” 2015 Fall KSAS Conference, Jeju, Korea, Nov. 2015.
    • D. Lee, H. Jin, J. Ahn, and Y. Lee, “Application study of Hybrid/Adaptive Design of Experiment to Wind Tunnel Testing,” 2015 KIMST Conference, Jeju, Korea, June. 2015.
    • B. Jo, T. Seong and J. Ahn, “Guidance Algorithm of Korean Lunar Lander,” 2015 KIMST Conference, Jeju, Korea, June. 2015.
    • H. Jin, D. Lee, D. Cho, J. Ahn, and Y. Lee, “The Correction of Hyperparameters in Gaussian Process applied for Wind tunnel Testing,” 2015 KIMST Conference, Jeju, Korea, June. 2015.
    • Han, B. Lee, Y. Yogasawara, M. Tahk, and J. Ahn, “Algorithm of Longitudinal Perch Landing Assisted by Thruster for Fixed Wing UAV,” 2015 Fall KSAS Conference, Jeju, Korea, Nov. 2015.
    • Han, M. Tahk, and J. Ahn, “Perch Landing Assisted by Thruster (PLAT),” 2015 KSAS Spring Conference, Gangwon, Korea, Apr. 2015.
    • Oh, J. Park, J. Park, J. Ahn, S. Cho, and Y. Kim, “Performance Analysis on Open/Closed-loop Load Relief Controllers for a Launch Vehicle during Ascent Phase,” 2015 KSAS Spring Conference, Gangwon, Korea, Apr. 2015.
    • H. Jin, D. Lee, J.Ahn, and S. Oh, “Wind tunnel testing based on Design of Experiments using D-optimal”, 2014 KSAS Fall Conference, Jeju, Korea, Nov. 2014.
    • S. Lee, and J.Ahn, “Analysis of Problems for Operation Optimization of Warship Defense Systems against Multiple Threats Obtained by Threat Plane Method”, 2014 KSAS Fall Conference, Jeju, Korea, Nov. 2014.
    • T. Seong, and J. Ahn, “Market and Engineering Survey of Earth Observation Satellite”, 2014 KSAS Fall Conference, Jeju, Korea, Nov. 2014.
    • J. Ahn, and D. Lee, “Group Decision Based Dependency Modeling – Methodology and Observations,” KSIAM 2014 Annual Meeting, Jeju, Korea, Nov. 2014
    • T. Seong, and J. Ahn, “Coverage Analysis of Diaster Monitoring Constellation Using Repeating Ground Track Orbits,” 2014 KIMST Conference, Jeju, Korea, June, 2014.
    • D. Lee, J. Ahn, and S. Oh, “Wind Tunnel Testing with Subspace Partitioning and Overlapped CCD,” 2014 KIMST Conference, Jeju, Korea, June, 2014.
    • S. Jung, H. Park, and J. Ahn, “Analysis of the Possibility of Mission Success of Unmanned Aircraft Systems Using Markov Chain Model,” 2014 KIMST Conference, Jeju, Korea, June, 2014.
    • H. Park, S. Jung, and J. Ahn, “Design of a Model for UAS Reconnaissance Missions,” 2014 KIMST Conference, Jeju, Korea, June, 2014.
    • Seong and J. Ahn, “Coverage Analysis of Disaster Monitoring Constellation Using Repeating Ground Track Orbits,” 2014 Korea Institute of Military Science and Technology Conference, Jeju, Korea, Jun. 2014.
    • S. Lee, and J. Ahn, “Development of Threat Plane for Constructing Optimization Problems for Operation of Anti-Air Missiles On a Naval Ship against Multiple Targets”, KSIAM 2014 Spring Conference, Seoul, Korea, May. 2014.
    • S. Jung, H. Park, and J. Ahn, “Modeling and Verification of Multi-UAV System Using Probabilistic Model Checking,” 2013 KSAS Fall Conference, Jeju, Korea, Nov. 2013.
    • H.Lee, J. Park, K. Oh, Y. Kim, J. Ahn, W. Roh, and S. Cho, “Load Relief Guidance Algorithm for Launch Vehicle Considering high-altitude wind,” 2013 KSAS Fall Conference, Jeju, Korea, Nov. 2013.
    • D. Lee, J. Ahn, and S. Oh, “Design of Experiment based wind tunnel testing for modeling aerodynamic force and moment coefficients using subspace and central composite design,” 2013 KSAS Fall Conference, Jeju, Korea, Nov. 2013.
    • Y. Nam, T. Sung, and J. Ahn, “Design of Flight Safety Display and Decision Rule for Launch Operations Considering Instantaneous Impact Point and Its Time Derivatives,” 2013 KSAS Fall Conference, Jeju, Korea, Nov. 2013.
    • H. Park and J. Ahn, “Modeling and verification of a UAV transport system using model checking,” 2013 Korea Institute of Military Science and Technology Conference, Jeju, Korea, July 4-5, 2013.
    • Y. Nam, S. Sung, and J. Ahn, “Design of flight safety system display for launch vehicle considering instantaneous impact point and velocity,” 2013 Korea Institute of Military Science and Technology Conference, Jeju, Korea, July 4-5, 2013.
    • D. Lee, H. Shim, J. Ahn, S. Park, and S. Oh, “Investigation of blocking and randomization in wind tunnel testing,” 2013 Korea Institute of Military Science and Technology Conference, Jeju, Korea, July 4-5, 2013.
    • Y. Nam, T. Seong, and J. Ahn, “Design of Flight Safety Information System Display for Launch Vehicle Considering Instantaneous Impact Point and Time Derivative,” 2013 KIMST Conference, Jeju, Korea, July. 2013.
    • J. Lee, M. Tahk, D. Lee, H. Shim, J. Ahn, D. Yoo, Y. Hwang, D. You, S. Park, N. Yoon, D. Won, “Fighter Air Combat Maneuver and Fire Control Logic Air,” 2012 KSAS Fall Conference, Jeju, Korea, Nov. 2012.
    • H. Na, B. Park, J. Ahn, M. Tahk, H. Choi, and G. Moon, “Evaluation and Optimization Framework for the Operation Strategy of Multiple Anti Anti-Ship Missiles,” 2012 KSAS Fall Conference, Jeju, Korea, Nov. 2012.
    • J. Seo and J. Ahn, “A Framework for Transportation Demand Modeling using the Discrete Choice model and the Customer Segmentation,” 2011 KSAS Fall Conference, Yongpyung, Korea, Nov. 2011.
    • E. Song, J. Ahn, W. Roh, and H. Choi, “Powered explicit guidance (PEG) for 3-staged satellite launch vehicle,” 2004 KSAS Spring Conference, Yongpyung, Korea, Apr. 2004.
    • J. Ahn, E. Song, W. Roh, and H. Choi, “Modified linear-sine algorithm for satellite launch vehicle,” 2003 KSAS Fall Conference, Kyungjoo, Korea, Nov. 2003.
    • H. Cho, W. Roh, and J. Ahn, “Implementation of the bending filter for KSR-III and post-flight spectral analysys,” 4th Symposium on Launch Vehicle Technologies, Daejon, Korea, May 2003.
    • J. Ahn, W. Roh, Sunglyong Kim, S. Kim, and Joon Kim, “Design of go/no-go decision criteria and launch angle correction methodology for KSR-III flight test,” 4th Symposium on Launch Vehicle Technologies, Daejon, Korea, May 2003.
    • W. Roh, H. Cho, J. Ahn, J. Park, H. Choi, and G. Cho, “R&D of KSR-III inertial navigation system (INS) and its flight test results,” 4th Symposium on Launch Vehicle Technologies, Daejon, Korea, May 2003.
    • J. Kim, J. Ko, J. Ahn, and S. Kim, “Comparison of gravity and atmospheric drag model for space vehicles,” 2003 KSAS Spring Conference, Chonan, Korea, Apr. 2003.
    • W. Roh, J. Ahn, S. Kim, and K. Lee, “Clearance analysis of KSR-III,” 2003 KSAS Spring Conference, Chonan, Korea, Apr. 2003.
    • J. Ahn, W. Roh, and J. Park, “Performance analysis of KSR-III flight test,” 2003 KSAS Spring Conference, Chonan, Korea, Apr. 2003.
    • W. Roh, J. Ahn, and H. Cho, “Attitude control of KSR-III sounding rocket,” 2003 KSAS Spring Conference, Chonan, Korea, Apr. 2003.
    • J. Ahn, W. Roh, H. Cho, and J. Park, “Dynamic modeling for stability analysis of KSR-III,” 2002 KSAS Fall Conference, Moojoo, Korea, Apr. 2002.
    • H. Cho, W. Roh, J. Ahn, J. Park, and G. Cho, “Hardware design of inertial navigation system (INS) for KSR-III,” 3rd Symposium on Launch Vehicle Technologies, Daejon, Korea, Mar. 2002.
    • W. Roh, J. Ahn, H. Cho, S. Yoon, J. Park, H. Choi, and G. Cho, “Design of bending mode stabilization filter for KSR-III,” 3rd Symposium on Launch Vehicle Technologies, Daejon, Korea, Mar. 2002.
    • W. Roh, H. Cho, J. Ahn, J. Park, H. Choi, G. Cho, H. Song, S. Jang, and H. Lee, “Development of strap-down inertial navigation system for KSR-III,” 2001 KSAS Fall Conference, Seoul, Korea, Nov. 2001.
    • J. Ahn, W. Roh, and J. Park, “Load-relief attitude programming of a rocket using feedback linearization,” 2001 KSAS Fall Conference, Seoul, Korea, Nov. 2001.
    • J. Ahn, W. Roh, B. Kim, J. Park, H. Kim, and Y. Chae, “Nominal reentry trajectory and dispersion analysis of space station MIR,” 2001 KSAS Spring Conference, Jinjoo, Korea, Apr. 2001.
    • J. Ahn, W. Roh, J. Lee, and J. Park, “The reentry trajectory analysis of space station MIR,” 2nd Symposium on Launch Vehicle Technologies, Daejon, Korea, Mar. 2001.
    • J. Ahn, W. Roh, H. Chung, and H. Choi, “A study on the limit cycle of thrust control system with time delay,” KACC 2000, Yongin, Korea, Oct. 2000.
    • J. Ahn, W. Roh, and J. Park, “Kick motor burning attitude determination using impact point prediction,” 2000 KSAS Spring Conference, Chungjoo, Korea, Apr. 2000.
    • W. Roh, J. Ahn, J. Park, and G. Cho, “Impact point prediction and Lambert guidance of a sounding rocket,” 1999 KSAS Fall Conference, Seoul, Korea, Nov. 1999.
    • K. Kim, J. Ahn, and Y. Kim, “A study on vibration suppression of KOMPSAT roll maneuver,” 1998 KSAS Fall Conference, Seoul, Korea, Nov. 1998.
    • J. Ahn, and Y. Kim, “Real-time missile guidance using parameter optimization technique,” 1998 KSAS Fall Conference, Seoul, Korea, Nov. 1998.