Chip Mappus

What do I do?

I am interested in feature selection and dimensionality reduction for segmentation in source separation techniques. I work with human brain data and use a variety of imaging methods to estimate brain state for control.

Selected Peer-reviewed publications

[1] R. Mappus, P. Corballis, and M. Jackson. Enhancing brain-machine interface throughput using simultaneous activation. ACM SIGCHI: Works-in-Progress, April 2009. [pdf]
[2] R. Mappus, G. Venkatesh, C. Shastry, A. Israeli, and M. Jackson. An fNIR based BMI for letter construction using continuous control. ACM SIGCHI: Works-in-Progress, April 2009. [pdf]
[3] Mark G. Duckworth, Jayme J. Caspall, Rudolph Mappus, Linghua Kong, Dingrong Yi, and Stephen H. Sprigle. Multispectral imaging approach to bruise aging: chromophore concentrations over time. In Proceedings of the SPIE medical imaging conference, February 2008.
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[4] R. Mappus, D. Minnen, and C. Isbell. Dimensionality reduction for improved source separation in fMRI data. In Proceedings of the International Conference on Bio-inspired Systems and Signal Processing, January 2008.
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[5] K. Czechowski, R. Ferguson, and R. Mappus. The first second of symmetry: Towards a model of visual search during symmetry verification. In Proceedings of the International Conference on Cognitive Modeling, 2007.
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[6] R. Mappus and A. Ram. A synapse plasticity model for conceptual drift problems. In Proceedings of the 28th Annual Meeting of the Cognitive Science Society, 2006.
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[7] R. Mappus, R. Ferguson, K. Czechowski, and P. Corballis. Spotting differences: how qualitative asymmetries influence visual search. In Proceedings of the 27th Annual Meeting of the Cognitive Science Society, 2005.
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Selected non-peer-reviewed presentations

[1] R. Mappus, M Hilimire, N. Parks, and P. Corballis. No sweat: Perspiration artifact removal in EEG data. Poster presentation, Annual meeting of the Society for Psychophysiological Research, October 2008.
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[2] R. Mappus, K. Czechowski, P. Corballis, and R. Ferguson. Exact differences processing inexact symmetry. Poster Presentation, Annual meeting of the Society for Psychophysiological Research, October 2008.
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Software

CL-LAB A set of common lisp macros for interfacing with GSLL.

CL-ICA Common lisp implementations of some ICA algorithms using CL-MathStats.

CL-USB Common lisp bindings for libusb.

Isolation Common lisp implementation of a simple turn-based game.

Yet Another Unofficial Georgia Tech Beamer Theme An unofficial beamer theme for latex slide creation.