Gray, R., “Introduction to systems engineering for engineering and engineering technology students,” World Transactions on Engineering and Technology Education, vol. 3, no. 1, pp. 159-162, 2004.
Gray, R, “Collaborating with industry to enhance an engineering technology curriculum,” Ethos (http://pennstatebehrend.psu.edu/academic/lrc/ethos/, peer reviewed, eds. Ruth Pflueger and Steve Ferruci), 2003.
Gray, R., “For GETS, A pipeline of talent,” Railway Age, vol. 203, pp. 71-73, 2002.
Gray, R., and Van Graas, F., “In-flight detection of errors for enhanced aircraft flight safety using DTED with GPS and radar altimeter,” Journal of the Institute of Navigation, vol. 47, no. 4, pp. 245-256, 2001.
Articles published in refereed proceedings
Gray, R., and Grisier, R., “Hazardous material tracking for rail cars: Power considerations and field test results,” Seventh Annual Pennsylvania Transportation Conference, University Park, PA, 5 pp., 2004.
Gray, R., and Grewal, A., “Rail synthetic vision system for enhanced safety,” Seventh Annual Pennsylvania Transportation Conference, University Park, PA, 8 pp., 2004.
Gray, R., and Hemminger, T., “A hands-on navigation technology workshop to support the math options for girls program,” 60th Annual Institute of Navigation Conference, Dayton, OH, 7 pp., 2004.
Gray, R., “Navigation, communication and information systems integration: A synthetic vision application to increase transportation safety,” Sixth Annual Transportation Conference, University Park, PA, 7 pp., 2003.
Gray, R., “Partnering with industry to provide students with active learning experiences,” UNESCO International Centre for Engineering Education, Global Congress on Engineering Education, Glasgow, Scotland, 4 pp., 2002.
Hemminger, T., and Gray, R., “A neural-based method of determining aircraft landing paths using DTED,” Artificial Neural Networks in Engineering (ANNIE), IEEE Neural Networks Council, St. Louis, MO, 22 pp., 2002.
Uijt de Haag, M., Campbell, J., and Gray, R., “Availability aspects of a terrain database integrity monitor,” USAF Central Internal Guidance Test Center/Institute of Navigation 57th ION & CIGTF Guidance Test Symposium, Albuquerque, NM, 8 pp., 2001.
Uijt de Haag, M., Young, S., and Gray, R., “Flight test results of a synthetic vision elevation database integrity monitor,” Aerosense Aerospace/Defense Simulation and Controls, Orlando, FL, 10 pp., 2001.
Uijt de Haag, M., Gray, R., and Young, S., “A performance evaluation of elevation database integrity monitors for synthetic vision systems,” AIAA/IEEE and Charles Stark Draper Laboratory, Eighth International Conference on Integrated Navigation Systems, St. Petersburg, Russia, 11 pp., 2001.
Gray, R., and Weissbach, R. S., “Industrial collaboration for an interdisciplinary elective in applied system design and remote diagnostics,” Proceedings of the 2001 American Society for Engineering Education (ASEE) Annual Conference, Session 1347, ID #768, Albuquerque, NM, 7 pp., 2001.
Gray, R., and Hemminger, T., “Validating digital terrain elevation data with neural networks,” Artificial Neural Networks in Engineering (ANNIE), St. Louis, MO, 22 pp., 2001.
Gray, R., and Weissbach, R. S., “Integration of SATCOM and GPS into a technology curriculum,” Proceedings of the 2000 American Society for Engineering Education (ASEE) Annual Conference, Session 3549, ID #1910, St. Louis, MO, 6 pp., 2000.
Gray, R., Uijt de Haag, M., and Young, S., “DTED integrity monitoring using differential GPS and radar altimeter,” IAIN World Congress, U.S. Institute of Navigation Annual Meeting, San Diego, CA, 10 pp., 2000.
Gray, R., Uijt de Haag, M., and Campbell, J., “A terrain database integrity monitor for synthetic vision systems,” 2000 IEEE/AIAA 19th Digital Avionics Systems Conference, Philadelphia, PA, 8 pp., 2000.
Gray, R., “In-flight detection of errors for enhanced aircraft flight safety using DTED with an INS, GPS, and radar altimeter,” International GPS Conference, Institute of Navigation, Nashville, TN, 9 pp., 1999.
Gray, R., “An integrated GPS/INS/BARO and radar altimeter for aircraft precision approach landings,” IEEE National Aerospace Conference, Dayton, OH, 8 pp., 1995.
Articles published in non-refereed proceedings
Gray, R., “Watching the northern border,” Penn State Outreach Magazine, Fall 2005.
Articles in in-house publications
Gray, R., Hemminger, T., and Fisher, K., “Command, control, communications, computers, and intelligence,” C4I Test Plan and Procedures, Presque Isle Station, Spring 2005.