Research and Experience

Yoonsuck Choe

Research Interests

  1. Biologically plausible neural network modeling of the visual cortex:
    Understanding the mechanisms of perceptual grouping in the visual system using: (1) self-organizing maps with lateral connections to capture input statistics and (2) synchronized and desynchronized spiking neurons for temporal representation of binding and segmentation.
  2. Pattern recognition:
    Use of laterally-interconnected self-organizing maps and classifier networks for handwritten character recognition.
  3. Image retrieval from large databases using image-based and text-based queries.

Research demos and posters (fairly out-dated)

  1. Spiking LISSOM (under construction)

  2. Hand-written digit recognition (live poster)

  3. SOM demo (standard Self-Organizing Map in JAVA)

  4. JAVA Colormap class demo (little colormap class)

  5. UTCS Neural Networks group research page

Selected Publications

  1. Yoonsuck Choe (2001). "Perceptual Grouping in a Self-Organizing Map of Spiking Neurons" (PDF). Technical Report AITR-01-292, Department of Computer Sciences, University of Texas at Austin, August 2001 [Ph.D. Dissertation]
  2. Yoonsuck Choe and Risto Miikkulainen (2001). "Contour Integration and Segmentation with Self-Organized Lateral Connections"(PDF). Submitted. (available as Technical Report AI2000-286, Department of Computer Sciences, University of Texas at Austin)
  3. Yoonsuck Choe and Risto Miikkulainen (2000). "A Self-Organizing Neural Network for Contour Integration through Synchronized Firing"(PDF) In Proceedings of the Seventeenth National Conference on Artificial Intelligence (AAAI-2000, Austin, TX), Cambridge, MA: MIT Press, pp. 123-128.
  4. Yoonsuck Choe and Risto Miikkulainen (1999). "Contour Integration Based on Synchronization Mediated by Self-Organized Lateral Connections", Techical Report AI99-283, Department of Computer Sciences, University of Texas at Austin, November 1999.
  5. Yoonsuck Choe, Risto Miikkulainen, and Lawrence K. Cormack (1999). "Effects of Presynaptic and Postsynaptic Resource Redistribution in Hebbian Weight Adaptation", Neurocomputing 32-33:77-82. (Also in J. M. Bower (editor), Computational Neuroscience: Trends in Research, 2000 (CNS*99, Pittsburgh, PA). New York: Elsevier, 2000.)
  6. Yoonsuck Choe and Risto Miikkulainen (1998: preprint). "Self-Organization and Segmentation in a Laterally Connected Orientation Map of Spiking Neurons", Neurocomputing volume 21, pages 139--157, 1998, Elsevier.
  7. Yoonsuck Choe and Risto Miikkulainen (1997). "Self-organization and Segmentation with Laterally Connected Spiking Neurons" , In Proceedings of the Fifteenth International Joint Conference on Artificial Intelligence, pages 1120-1125. Morgan Kaufman, San Mateo, CA, 1997.
  8. Risto Miikkulainen, James A. Bednar, Yoonsuck Choe, and Joseph Sirosh (1997). "Self-Organization, Plasticity, and Low-level Visual Phenomena in a Laterally Connected Map Model of the Primary Visual Cortex", In R.L. Goldstine, P.G. Schyns, and D.L. Medin editors, Perceptual Learning, volume 36 of Psychology of Learning and Motivation, pages 257-308. Academic Press, San Diego, CA, 1997.
  9. Joseph Sirosh, Risto Miikkulainen, and Yoonsuck Choe (Editors, 1996). Lateral Interactions in the Cortex: Structure and Function.. The UTCS Neural Networks Research Group, Austin, TX, 1996. Electronic book, ISBN 0-9647060-0-8.
  10. Yoonsuck Choe, Joseph Sirosh, and Risto Miikkulainen (1995). "Laterally Interconnected Self-Organizing Maps in Hand-Written Digit Recognition" , To appear in D.S.Touretzky, M.C.Mozer, and M.E.Hasselmo. (Editors), Advances in Neural Information Processing Systems 8, pages 736-742. MIT Press, Cambridge, MA, 1996.
  11. Yoonsuck Choe (1995). "Laterally Interconnected Self-Organizing Feature Map in Handwritten Digit Recognition", Techical Report AI95-236, Department of Computer Sciences, University of Texas at Austin, August 1995 [Masters Thesis]

Employment

	

       9/01-	     Assistant Professor, Department of Comptuer Science,
		     Texas A&M University.

       11/99-1/01,   Research Assistant, Department of Computer Sciences,
       6/98-5/99,    The University of Texas at Austin.
       6/97-8/97,    Supervising Professor: Prof. Risto Miikkulainen.
       6/96-8/96

       6/99-10/99    Summer Intern, Exploratory Research & Development,
       	             Advanced Technology Division, HNC Inc. San Diego

       8/97-5/98,    Teaching Assistant, Department of Computer Sciences
       1/97-5/97,    The University of Texas at Austin.
       8/96-12/96    CS378 Network Protocol Implementation (Sp97, F98, Sp98),
                     CS310 Computer Organization and Programming (F96).
                     Instructor Prof. Chris Edmondson-Yurkanan.

       6/95-5/96     Research Assistant, Department of Chemical Eng.
                     The University of Texas at Austin.
                     Supervising Professor: Prof. Roger Bonnecaze.

       12/92-5/93    Database Programming/Consulting, Doping Control Center,
                     Korea Institute of Science and Technology.
                     Supervisor: Dr. Jong-Sei Park .

Other Experience

	1/96-8/01    System Administrator (PC-Linux/HPUX/NeXTstep/DECterm),
			  The Neural Networks Research Group,
			  Department of Computer Sciences,
			  The University of Texas at Austin

Programming and other Skills 

	Programming (Strong) : C/C++, Perl, Tcl/Tk, JAVA

	Programming (Moderate): bash(sh)/tcsh(csh), awk, sed, Pascal, 
		Smalltalk, Foxpro/DBIII.

	Libraries and API: Xlib, X/Motif, BSD Socket Lib, CRAY J90 lib.

	Other tools: Latex, HTML, CGI programming (mainly in Perl).
		Matlab, GNU/Octave

Awards and Honors 

	9/1999		: Schulumberger Scholarship

Curriculum Vitae

See the full curriculum vitae for a complete list of publications, experienecs, etc.
This page is maintained by Yoonsuck Choe (yschoe@cs.utexas.edu).
Last Updated:
Tue Oct 2 00:22:26 CDT 2001

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