Publications
Publications
Xiao JB, Seekamp JM, Chung LK, El-Amir IN, Schiefer KC, Trimas DJ, Tuey R, Kearfott KJ. Design of a do-it-yourself Geiger-Muller counter with smartphone mapping application. Health Phys 117(1):84-98; 2019. DOI: 10.1097/HP.0000000000001053
Noey JD, Xiao JB, DiFulvio A, Suileman NA, Carmona MA, Chung LK, El-Amir IN, Frank SJ, Liu K, Schiefer K, Seekamp JM, Sosa CS, Trimas DJ, Vyas AP, Kearfott KJ. The effects of radiation and emitted light transport on the positional response of 11 cm × 42.5 cm × 5.5 cm NaI(Tl) detectors. Health Phys 117(4):362-377; 2019. DOI: 10.1097/HP.0000000000001051
Ye Y, Liu W, Li S, Huang C, Guo Q, Chung LK, Chen G, Liu Y. A Laboratory Method for Concurrently Determining Diffusion Migration Parameters and Water Saturation Effects of Thoron in Uranium Tailings. Chemosphere 249:126520; 2020. DOI: 10.1016/j.chemosphere.2020.126520
Ye Y, Chung LK, Zhou Q, Kearfott KJ. Evaluation of 222Rn and 220Rn discriminating concentration measurements with pinhole-based twin cup dosimeters using computational fluid dynamics simulations. Radiat Meas 134:106369; 2020. DOI: 10.1016/j.radmeas.2020.106369
Seekamp JM, Noey JD, Kwapis EH, Chung LK, Shubayr NA, Smith T, Trimas DJ, Kearfott KJ. Design and characterization of an affordable extremely-sensitive, large-volume gamma-ray spectrometer for environmental samples. Health Phys 119(2):252-260; 2020. DOI: 10.1097/HP.0000000000001271
Chung LK, Mata LA, Carmona MA, Shubayr NA, Zhou Q, Ye Y, Kearfott KJ. Radon kinetics in a natural indoor radon chamber. Sci Total Environ 734:139167; 2020. DOI: 10.1016/j.scitotenv.2020.139167
Liu T, Di Fulvio A, Chung LK, Kearfott KJ. Radiation mapping for unmanned aerial vehicle: development and simulated testing of algorithms for source mapping and navigation path generation. Health Physics 120(3):321-338; 2021. DOI: 10.1097/HP.0000000000001334
Kuchta JR, Thiesen JH, Noey JD, Chung LK, Kearfott KJ. Preliminary experiences with the Rexon UL-320-FDR: an automated thermoluminescent dosimeter reader with removable contact heating planchets and an infrared temperature feedback system. Health Phys 120(4):463-471; 2021. DOI: 10.1097/HP.0000000000001386
Chung LK, Piersma NP, Kearfott KJ. Radon kinetics in a basement space measured with different devices. Health Phys 120(5):582-588; 2021. DOI: 10.1097/HP.0000000000001402
Chung LK, Kent AJE, Cooney MA, Noey JD, Liebler KJ, Kearfott KJ. Simulations and experimental verifications of an algorithm for radiation source mapping and navigational path generation. Health Phys 120(6):648-660; 2021. DOI: 10.1097/HP.0000000000001392
Chen D, Ye Y, Xia M, Shang S, Yan Z, Chung LK. Numerical simulations of radon exhalation from surrounding rocks of single and double underground roadways. J Environ Radioactiv 273:107388; 2024. DOI: 10.1016/j.jenvrad.2024.107388
Chung LK*, Jung W*, Kong C, Kousik S. Goal-reaching trajectory design near danger with piecewise affine reach-avoid computation. Robotics: Science and Systems (RSS); Delft, Netherlands; July 15-19, 2024. (Paper, platform presentation, and poster)
Chung LK, Jung W, Pullabhotla S, Shinde P, Sunil Y, Kota S, Batista LFW, Pradalier C, Kousik S. Guaranteed reach-avoid for black-box systems through narrow gaps via neural network reachability. IEEE International Conference on Robotics and Automation (ICRA); Atlanta, Georgia; May 19-23, 2025. (Paper, platform presentation, and poster)
Chung LK*, Dai A*, Knowles D, Kousik S, Gao GX. Constrained feedforward neural network training via reachability analysis. Robotics: Science and Systems (RSS), Robotics for People (R4P) Workshop; Virtual; July 15, 2021. (Paper and poster)
Jung W*, Chung LK*, Pullabhotla S, Shinde P, Kousik S. NeuralPARC: guaranteed reach-avoid for black-box systems near danger. Robotics: Science and Systems (RSS), Towards Safe Autonomy: Emerging Requirements, Definitions, and Methods workshop; Delft, Netherlands; July 19, 2024. (Paper, platform presentation, and poster)
Gandhi BR, Chung LK, Trimas DJ, Kearfott KJ. A robotic arm for the automation of an optically stimulated luminescent dosimeter reader. Health Phys 115(1):S58; 2018. (Platform presentation)
Seekamp J, Noey JD, Miller JM, Shubayr NA, Chung LK, DiFulvio A, Wong CY, Xiao J, Kearfott KJ. Design of an extremely sensitive large volume gamma-ray spectrometer for environmental sample screening. Health Phys 115(1):S59; 2018. (Platform presentation)
Mapes JL, Liu K, Latosz LV, Abraham SA, Golduber RM, Trimas DJ, Wilhelm AS, Chung LK, Kearfott KJ. A dosimetry calibration facility in a space-constrained environment. Health Phys 115(1):S138; 2018. (Platform presentation)
Carmona MB, Mata LA, Shubayr NA, Miller JM, Chung LK, Xiao J, Yuan F, Zhou Q, Kearfott KJ. A discovered radon chamber for educational and research purposes. Health Phys 115(1):S145-146; 2018. (Platform presentation)
Kearfott KJ, Xiao J, Carmona M, Yuan F, Chung LK, DiFulvio A, Pozzi SA. A radiation weather station system for research and public outreach. Health Phys 115(1):S146; 2018. (Platform presentation)
Myslak W, El-Amir IN, Yuan F, Chung LK, Gandhi BR, Seekamp J, Xiao J, Kearfott KJ. Simple nuclear science related Raspberry Pi projects for precollege outreach in science, technology, engineering, and math. Health Phys 115(1):S147; 2018. (Platform presentation)
Xiao J, El-Amir IN, Seekamp J, Chung LK, Myslak W, Kearfott KJ. An affordable do-it-yourself radiation detector for nuclear science outreach. Health Phys 115(1):S148; 2018. (Platform presentation)
Champion RJ, Golduber RM, Chung LK, Kearfott KJ. Use of an imaging spectrometer for characterization of a cesium facility. Health Phys 117(6):26-27; 2019. (Poster)
Dewald RM, Shen BJ, Tuey RA, Miller JM, Chung LK, Noey JD, Kearfott KJ. Performance of Soviet Geiger-Muller tubes with a computerized do-it-yourself detector. Health Phys 117(6):33; 2019. (Poster)
Mata LA, Ye YJ, Chung LK, Carmona MA, Maurer TE, Shubayr NA, Zhou Q, Kearfott KJ. Radon kinetics in a natural indoor radon chamber. Health Phys 117(6):62; 2019. (Poster)
Maurer TE, Chung LK, White WJ, Kearfott KJ. Evolution of the University of Michigan’s radiation weather station system for research and public outreach. Health Phys 117(6):62; 2019. (Poster)
Thiesen JH, Kuchta JR, Pombier KD, Chung LK, Golduber RM, Noey JD, Kearfott KJ. Characterization of an automated, all-purpose thermoluminescent dosimeter reader with removable planchets. Health Phys 117(6):80; 2019. (Poster)
Tuey RA, McClain RM, Miller JM, Chung LK, Li M, Shen BJ, Dewald RM, Wisusik FF, Noey JD, Kearfott KJ. University of Michigan’s computerized do-it-yourself Geiger-Muller radiation detector: preparation for outreach programs. Health Phys 117(6):82; 2019. (Poster)
Ye Y, Mata LA, Zhou Q, Chen G, Su H, Chung LK, Morishita Y, Carmona MA, Kearfott KJ. Numerical simulation of radon migration and exhalation rules of loose porous emanation media during measuring of the radon exhalation rate. Health Phys 117(6):86-87; 2019. (Poster)
Ye Y, Mata LA, Zhou Q, Huang J, Chung LK, Morishita Y, Carmona MA, Liu W, Kearfott KJ. Numerical simulation of radon concentration distribution in a discovered radon chamber with and without fans. Health Phys 117(6):87; 2019. (Poster)
Ye YJ, Chung LK, Zhou Q, Kearfott KJ. Study of the reliability of soil 222Rn and 220Rn concentrations measured with in-situ diffusion chamber methods. Health Phys 117(6):87; 2019. (Poster)
Chung LK, Liebler KJ, Kent AJ, Noey JD, Kearfott KJ. Radiation simulation using Wi-Fi signal strength and frequency. In: Proceedings of the 46th Annual Waste Management Conference. Phoenix, Arizona: Waste Management Symposia; WM2020; 2020. (Poster)
Chung LK, Cooney MA, AJ Kent, KJ Liebler, JD Noey, KJ Kearfott. Radiation source mapping and navigational path determinations for radiation source searches. Health Phys 122(4):25; 2022. (Platform presentation)
Chung LK, JD Noey, TW Kennings. Use of naturally occurring radon in a basement storage space to teach first order linear kinetics. Health Phys 122(4):25; 2022. (Platform presentation)
Chung LK. Experience with COVID as a graduate student. Health Phys 122(4):26; 2022. (Platform presentation)
Liebler KJ, Cooney MA, Chung LK, AJ Kent, JD Noey, Kearfott KJ. Comparison of common methods for single detector radiation source localization. Health Phys 122(4):45; 2022. (Platform presentation)
Chung LK, Chan A, Li Y, Wong A, Davis CC, Noey JD, Kearfott KJ. Application and comparison of multi-robot exploration methods for radioactive source localization. Health Phys 123(1):70; 2022. (Platform presentation)
Davis CC, Chung LK, Trager ME, Kim RA, Noey JD, Kearfott KJ. A mapping and navigation algorithm for an intelligent radiation awareness drone. Health Phys 123(1):71; 2022. (Platform presentation)
Carmona M, Yuan F, Chung LK, Mata LA, Miller JM, Trimas DJ, Xiao J, Kearfott KJ. Intercomparison of commercially available active radon measurement devices in a “discovered” radon chamber. National Nuclear Security Administration Consortium for Verification Technology, Ann Arbor, Michigan; November 29-30, 2017. (Poster)
Liu K, Mapes JL, Abraham SA, Wilhelm AS, Latosz L, Chung LK, Golduber RM, Miller JM, Trimas DJ, Kearfott KJ. Setup and characterization of a cesium-137 dosimetry calibration source in a space-constrained environment. National Nuclear Security Administration Consortium for Verification Technology, Ann Arbor, Michigan; November 29-30, 2017. (Poster)
Yuan F, Xiao J, Carmona M, DiFulvio A, Chung LK, Noey JD, Seekamp J, Kearfott KJ. Identification of radiation events for a spectroscopic radiation weather station. National Nuclear Security Administration Consortium for Verification Technology, Ann Arbor, Michigan; November 29-30, 2017. (Poster)
Chung LK, Kearfott KJ. Container design for a do-it-yourself Geiger Mueller smart detector. University of Michigan Undergraduate Research Opportunities Program (UROP) Symposium, Ann Arbor, Michigan; April 18, 2018. (Poster)
Gandhi BR, Chung LK, Kearfott KJ. A robotic arm for a non-automated optically stimulated luminescent dosimetry system. University of Michigan Undergraduate Research Opportunities Program (UROP) Symposium, Ann Arbor, Michigan; April 18, 2018. (Poster)
Suresh VS, Chung LK, Li M, Tuey RA, Dewald RM, Shen BJ, Kearfott KJ. Evaluation of a cellphone accelerometer for small-scale radiation mapping using a Geiger-Muller tube. University of Michigan Undergraduate Research Opportunities Program (UROP) Symposium, Ann Arbor, Michigan; April 24, 2019. (Poster)
Maurer TE, White WJ, Mata LA, Kang S, Chung LK, Kearfott KJ. Preliminary analysis of radon data from a radiation weather station. University of Michigan Undergraduate Research Opportunities Program (UROP) Symposium, Ann Arbor, Michigan; April 24, 2019. (Poster)
McClain RM, Tuey RA, Miller JM, Chung LK, Li M, Dewald RM, Shen BJ, Kearfott KJ. Do-it-yourself Geiger-Muller (DIYgm) radiation detector: instruction and demonstration. University of Michigan Undergraduate Research Opportunities Program (UROP) Symposium, Ann Arbor, Michigan; April 24, 2019. (Poster)
Chung LK, Li M, Maurer TE, Mata LA, Noey JD, Kearfott KJ. University of Michigan’s outreach-related undergraduate radiological health engineering research projects. National Nuclear Security Administration University Program Review, Raleigh, North Carolina; June 4-6, 2019. (Poster)
Chung LK, Ye Y, Mata LA, Zhou Q, Huang J, Morishita Y, Carmona MA, Liu W, Kearfott KJ. Study of airflow dynamics in a basement using computational fluid dynamics simulations. University of Michigan Undergraduate Research Opportunities Program (UROP) Symposium, Ann Arbor, Michigan; July 31, 2019. (Poster)
Kent KJ, Chung LK, Noey JD, Kearfott KJ. Preliminary demonstration of radiation simulation with WiFi signals. University of Michigan Undergraduate Research Opportunities Program (UROP) Symposium, Ann Arbor, Michigan; July 31, 2019. (Poster)
Noey JD, Chung LK, Kearfott KJ. The do-it-yourself Geiger-Muller (DIYgm): practical experience with construction and planned technical enhancements. National Nuclear Security Administration Consortium for Monitoring, Technology, and Verification, Ann Arbor, Michigan; March 10-11, 2020. (Poster)
Trager ME, Chung LK, Kearfott KJ. Container design for a do-it-yourself Geiger Mueller smart detector. University of Michigan Undergraduate Research Opportunities Program (UROP) Symposium, virtual; April 15, 2020. (Poster)
Liebler K, Chung LK, Liu T, Kent A, Noey JD, Kearfott KJ. Simulation and optimized mapping of ionized radiation sources using Wi-Fi signals. University of Michigan Undergraduate Research Opportunities Program (UROP) Symposium, virtual; April 15, 2020. (Poster)
Romano SA, Noey JD, Chung LK, Kearfott KJ. A quantitative comparison between two large volume gamma-ray spectrometer mount configurations. University of Michigan Undergraduate Research Opportunities Program (UROP) Symposium, virtual; April 15, 2020. (Poster)
Huang CC, Li M, Chung LK, Noey JD, Kearfott KJ. Data visualization for the do-it-yourself Geiger Muller smart detector. University of Michigan Undergraduate Research Opportunities Program (UROP) Symposium, virtual; April 15, 2020. (Poster)
Mosher G, Chung LK, Kearfott KJ. Built-in cellphone accelerometer for determining position and velocity. University of Michigan Undergraduate Research Opportunities Program (UROP) Symposium, virtual; April 15, 2020. (Poster)
Dai A*, Chung LK*, Kousik S, Gao GX. Safe neural network training via reachability analysis. Stanford Computer Forum Affiliates Meeting, AI Safety Workshop; Stanford, California; September 14, 2021. (Platform presentation and poster)
Davis CC, Trager ME, Chung LK, Kearfott KJ. Algorithms for rapid localization of lost radioactive sources. 2022 Spring Young Investigators Virtual Symposium, virtual; April 14, 2022. (Platform presentation)
Chung LK, Kousik S. Provably-safe neural network training using hybrid zonotope reachability analysis. arXiv preprint arXiv:2501.13023; 2025.
Kearfott KJ, Chung LK, Kent AJ, Noey JD. Radiation simulation using Wi-Fi signal strength and frequency. Submitted August 1, 2019. UM Disclosure D2020-0034.
Kearfott KJ, Chung LK, Kent AJ, Noey JD. Method for mapping the origin and strength of Wi-Fi signals. Submitted August 1, 2019. UM Disclosure D2020-0035.
* equal contribution