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Sehchang Hah, PhD. has retired from the branch.

We wish them luck in future endeavours!


Sehchang Hah is an engineering research psychologist with the Human Factors Branch. He received his B.A. in psychology from Seoul National University, and his M.A. and Ph.D. in experimental psychology from The Ohio State University. Before joining the FAA, he worked for the United States Air Force as a contractor, the National Transportation Safety Board, and the United States Military Academy. Since joining the FAA, he has worked on both air traffic and Technical Operations human factors issues.

Publications

Hah, S., Hallman, K., & Williams, B. (2017). NextGen Air Traffic Control and Technical Operations Alarms and Alerts Evaluation (DOT/FAA/TC-17/61). Atlantic City International Airport, NJ: Federal Aviation Administration William J. Hughes Technical Center.

Hah, S., Willems, B., Muller, G., Johnson, D., Schulz, K., DiRico, J., Hallman, K., Maliko-Abraham, H., Alvidrez, S., Bastholm, R., Dworsky, M., & Fincannon, T. (2017). Human-in-the-Loop Simulation Experiment of Integrated Arrival/Departure Control Services (DOT/FAA/TC-15/43). Atlantic City International Airport, NJ: Federal Aviation Administration William J. Hughes Technical Center.

Harrison, J., Izzetoglu, K., Ayaz, H., Willems, B., Hah, S., Ahlstrom, U., Woo, H., Shewokis, P.A., Bunce, S.C., & Onaral, B. (2014). Cognitive workload and learning assessment during the implementation of a Next-Generation Air Traffic Control Technology using functional Near-Infrared Spectroscopy. Human-Machine Systems, IEEE Transactions, Volume: 44 , Issue: 4. DOI: 10.1109/THMS.2014.2319822.429–440.

Hah, S., Willems, B., Mueller G., et al. (2013). Human Factors Evaluation of Conflict Resolution Advisories in the En Route Domain (DOT/FAA/TC-13/55). Atlantic City International Airport, NJ: Federal Aviation Administration William J. Hughes Technical Center.

Woo, H., Willems, B., Harrison, J.Izzetoglu, K, Hah, S., & Ayaz, H. (2013). The use of functional near infrared spectroscopy (fNIRS) to assess cognitive workload of air traffic controllers. Proceedings of the 16th International Symposium on Aviation Psychology.

Hah, S., Willems, B., Ayaz, H., Bunce, S., Izzetoglu K., & Deshmukh, A. (2011). The comparison of air traffic controllers' to college students' memory performance and brain activities. Proceedings of the 16th International Symposium on Aviation Psychology, May 2-5.

Ayaz, H., Willems, B., Bunce, S., Shewokis, P. A., Izzetoglu, K., Hah, S., Deshmukh, A., Onaral, B. (2011). Estimation of Cognitive Workload during Simulated Air Traffic Control using Optical Brain Imaging Sensors. Proceedings of the14th International Conference on Human-Computer Interaction.

Willems, B., Hah, S., and Schulz, K. (2011), Evaluation of the impact of data communications on controller workload using the functional near infra red imaging technique. Digital Avionics Systems Conference (DASC), 978-1-61284-798-6/11/, 6D3-1 to 6D3-8.

Willems, B., Hah, S., & Schulz, K. (2010). En route data communications: Experimental human factors evaluation (DOT/FAA/TC-10/06). Atlantic City International Airport, NJ: Federal Aviation Administration William J. Hughes Technical Center.

Hah, S., Yuditsky, T., Schulz, K., Dorsey, H., Deshmukh, A., & Sharra, J. (2010). Chapter 90. Speech intelligibility and visual performance while wearing powered air purifying respirators (PAPRs). In Duffy, V. G. (Ed.), Advances in Human Factors and Ergonomics in Healthcare (pp. 814-824). NY: Taylor & Francis.

Ayaz, H., Willems, B., Bunce, S., Shewokis, P. A., Izzetoglu, K., Hah, S., Deshmukh, A., Onaral, B. (2010). Cognitive workload assessment of air traffic controllers using optical brain imaging sensors. In T. Marek, W. Karwowski & V. Rice (Eds.), Advances in Understanding Human Performance: Neuroergonomics, Human Factors Design, and Special Populations (pp. 21-32): FL: CRC Press, Taylor & Francis Group.

Hah, S., Yuditsky, T., Schulz, K. A., Dorsey, H., Deshmukh, A. R., & Sharra, J. (2009). Evaluation of human performance while wearing respirators (DOT/FAA/TC-09/10). Atlantic City International Airport, NJ: Federal Aviation Administration William J. Hughes Technical Center.

Hah, S., Willems, B., Schulz, K. (2008). The Relationship between Aircraft Count and Controller Workload in Different En Route Workstation Systems. Proceedings of the Human Factors and Ergonomics Society 52nd Annual Meeting. 44-48.

Willems, B., & Hah, S. (2008). Future En Route Workstation Study (FEWS II): Part 1 − Automation Integration Research (DOT/FAA/TC-08/14,II). Atlantic City International Airport, NJ: Federal Aviation Administration William J. Hughes Technical Center.

Willems, B., Hah, S., & Phillips, R. (2008). Future En Route Workstation Study (FEWS I): Part 1 − Evaluation of Workstation and Traffic Level Effects (DOT/FAA/TC-08/14,I). Atlantic City International Airport, NJ: Federal Aviation Administration William J. Hughes Technical Center.

Hah, S., Willems, B., & Phillips, R. (2006). The effect of air traffic increase on controller workload. Proceedings of the Human Factors and Ergonomics Society 50th Annual Meeting , 50-54.

Hah, S., Ahlstrom, V. (2005) Comparison of speech with keyboard and mouse as the text entry method. Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 49, 619-622.

Della Rocco, P., Panjwani, G., Friedman-Berg, F., Kopardekar, P., & Hah, S. (2004). Collocation of User Request Evaluation Tool, Traffic Management Advisor, and Controller Pilot Data Link Communications: An Initial Human Factors Evaluation (DOT/FAA/CT-TN04/06). Atlantic City International Airport, NJ: Federal Aviation Administration William J. Hughes Technical Center.

Hah, S. (2002). Coordination between airway facilities and air traffic: Empirical findings. Journal of Air Traffic Control, 44(3), 30-35.

Hah, S. (2002). Coordination between airway facilities specialists and air traffic personnel (DOT/FAA/CT-TN02/07). Atlantic City International Airport: Federal Aviation Administration William J. Hughes Technical Center.

Hah, S., & Hickey, T. (2001). Computer text shading algorithm based on perception of luminance. Proceedings of the 45th Human Factors and Ergonomics Society Annual Meeting, Minneapolis, MN. 622-226.