Samuel A. Inverso
Email: sam (dot) inverso (at) gmail (dot) com

Résumé in HTML PDF

Where is Sam?!

http://www.saminverso.com

Master's Thesis, Computer Science

Automatic Error Recovery Using P3 Response Verification for a Brain-Computer Interface

Download it in PDF [2 MB] and references as HTML or Bibtex

Abstract: A brain-computer interface (BCI) is an augmentative communication mechanism that does not rely on peripheral nerves or muscles. Current BCIs are error prone and slow with error rates of 10 to 30% and transmission rates of 10-25 bits/min, however, error recovery and correction in BCI has largely been neglected. The focus of this thesis is the development of a method to automatically recover errors in BCI using the P3 brain signal for response verification. The existence of the P3 signal in responses to controlled goal items is shown in an evoked potential BCI used to control items in a virtual apartment. A reduced response exists when items are accidentally controlled. Offline experiments were run, and with a theoretical mean improvement in accuracy from 78% to 85%, there was a statistically significant improvement (P < 0.008, Wilcoxon signed rank test) in accuracy of 3% using a correlation algorithm for P3 signal detection on responses. The presence of the P3 signal in responses to goal items indicates it can be used for automatic error recovery without requiring additional time, which will improve the speed and accuracy of brain-computer interfaces.

Publications

See http://www.saminverso.com/research

Projects

Genetic Algorithms: Evolutionary Methods for 2D Cellular Automata Computation for Density Classification, Synchronization, and Balanced Surface Minimization PDF

Computer Vision: Ellipse Detection Using Randomized Hough Transform PDF, Errata, and Code

Distributed AI: Temporal Difference Agents in Robocode Online HTML

Neural Networks: Where's Waldo? the Neural Network: Specific Face Recognition Using a Backpropagation Neural Network PDF

Miscellaneous

C++ Dynamic Multidimensional Array example: MultiArray.cpp. Templated utility class: MultiArrayUtilties.h MultiArrayUtilties.cpp

Cygwin Installation Tutorial: Cygwin is a Unix like environment for Windows. Tutorial details installing ssh, Vim, and Emacs under Cygwin.

wrap A perl script that traverses files specified on the command line calling subroutines before and after traversing, and before, on, and after each line. Wrap currently places a header and footer with the file name around each file and writes everything to standard out. There are options to number the lines without justification and with right justification.

Vim Configuration Files

Rename the Vim config files to .vimrc .gvimrc for Unix or _vimrc _gvimrc for Windows.
Vim config file vimrc
GVim config file gvimrc



Theoretical distance traversed while engaged in cardiovascular activity since April 18, 2002: 2,907 miles - Goal: Pluto's Circumference (4528 miles)

Last Updated: September 16, 2009