An Orthonormal Basis for Topic Segmentation in Tutorial Dialogue Andrew Olney author Zhiqiang Cai author 2005-10 text Proceedings of Human Language Technology Conference and Conference on Empirical Methods in Natural Language Processing Raymond Mooney editor Chris Brew editor Lee-Feng Chien editor Katrin Kirchhoff editor Association for Computational Linguistics Vancouver, British Columbia, Canada conference publication olney-cai-2005-orthonormal https://aclanthology.org/H05-1122/ 2005-10 971 978