Ratchaneekorn Thamvichai

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Courses

Scholarly Contributions

Journals/Publications

• Masoudi,, A., Thamvichai, R., & Neifeld, M. A. (2017). Computed tomography imaging system design for shape threat detection. Optical Engineering, 56(4).
• Thamvichai, R., & Neifeld, M. A. (2016). Computed tomography imaging system design for shape threat detection. Optical Engineering, 56.
• Thamvichai, R., & Bose, T. (2002).

  Stability of 2-D periodically shift variant filters

  . IEEE Transactions on Circuits and Systems Ii: Analog and Digital Signal Processing. doi:10.1109/82.996060
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  The stability of two-dimensional (2-D) periodically shift varying (PSV) filters is considered. The considered system is represented in state space by the first model of Fornasini-Marchesini (FM) with periodic coefficients. The stability of this model is then studied. Two necessary conditions and two sufficient conditions are established for asymptotic stability. The conditions are easy to use and computationally simple.

Proceedings Publications

• Voris, J., Ding, Y., Thamvichai, R., Greenberg, J., Coccarelli, D., Gehm, M., Johnson, E., Bosch, C., & Ashok, A. (2019, Spring). Information-theoretic analysis of fixed Gantry x-ray computed tomography transmission system for threat detection. In SPIE Anomaly Detection and Imaging with X-Rays (ADIX).
  More info

  DOI: 10.1117/12.2519812
• Coccarelli, D., Greenberg, J. A., Thamvichai, R., Voris, J., Masoudi, A., Ashok, A., & Gehm, M. E. (2018, April). An information theoretic approach to system optimization accounting for material variability. In Proc. SPIE 10632, Anomaly Detection and Imaging with X-Rays (ADIX) III, 106320F, 10632, 10632 - 10632 - 8.
• Thamvichai, R., Huang, L., Ashok, A., Gong, Q., Coccarelli, D., Greenburg, J. A., Gehm, M. E., & Neifeld, M. A. (2017, 06/2017). Adaptive x-ray threat detection using sequential hypotheses testing with fan-beam experimental data. In SPIE 10187, Anomaly Detection and Imaging with X-Rays (ADIX) II.
• Masoudi, A., Thamvichai, R., & Neifeld, M. A. (2016, Spring). Shape threat detection via computed tomography. In Proc. SPIE 9847, Anomaly Detection and Imaging with X-Rays (ADIX).
• Thamvichai, R., Blanche, P. A., Norwood, R. A., Wissinger, J. W., Neifeld, M. A., & Peyghambarian, N. N. (2016, 10/2016). Optical Implementation of Probabilistic Graphical Models. In Rebooting Computing (ICRC), IEEE International Conference on.
• Masoudi, A., Neifeld, M. A., & Thamvichai, R. (2015, n/a). Target Detection Via Adaptive Tomography. In Imaging and Applied Optics 2015, OSA Technical Digest (online) (Optical Society of America, 2015).

Presentations

• Ashok, A., Mandava, S., Thamvichai, R., Bilgin, A., Coccarelli, D., Greenburg, J., & Gehm, M. (2017, November). Sparse View Bag Reconstruction vis-a-vis Threat Detection. Concealed Explosive Detection Workshop. Charlottesville, VA: DHS.
• Blowers, P., Blowers, P., Burd, G. D., Burd, G. D., Bolger, M. S., Bolger, M. S., Johns, K. A., Johns, K. A., Lazos, L., Lazos, L., Lysecky, R. L., Lysecky, R. L., Milsom, J. A., Milsom, J. A., Novodvorsky, I., Novodvorsky, I., Pollard, J. R., Pollard, J. R., Prather, E. E., , Prather, E. E., et al. (2014, Oct). Developing Faculty Cultures for Evidence-Based Teaching Practices in STEM: A Progress Report. Transforming Institution: 21st Century STEM Undergraduate Education Conference. Indianapolis, IN: AAU-STEM.
• Blowers, P., Burd, G. D., Bolger, M. S., Johns, K. A., Lazos, L., Lysecky, R. L., Milsom, J. A., Novodvorsky, I., Pollard, J. R., Prather, E. E., Talanquer, V. A., Thamvichai, R., Tharp, H. S., Wallace, C. S., Cox, J., Elfring, L., Grubbs, E., & Hunter, J. (2014). Developing Faculty Cultures for Evidence-Based Teaching Practices in STEM: A Progress Report. Transforming Institution: 21st Century STEM Undergraduate Education Conference. Indianapolis, IN: AAU-STEM.

Poster Presentations

• Roveda, J. M., Neifeld, M. A., & Thamvichai, R. (2016, Sept). The Subthreshold Design for the Computation in Graphic Interface. MURI Optical Science. Tucson Arizona: ONR.
• Thamvichai, R., Wissinger, J. W., & Neifeld, M. A. (2016, 09/2016). Optoelectronic Graphical Inference Architectures. MURI Optical Sciences. Tucson, AZ.