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Modeling Others from Observations Papers from the AAAI Workshop Technical Report WS-06-13 AAAI Press American Association for Artificial Intelligence AAAI Press 445 Burgess Drive Menlo Park, California 94025 ISBN 978-1-57735-295-2 WS-06-13 Modeling Others from Observations Papers from the AAAI Workshop Gal Kaminka, David Pynadath, and Christopher Geib, Cochairs Technical Report WS-06-13 AAAI Press Menlo Park, California Copyright © 2006, AAAI Press The American Association for Artificial Intelligence 445 Burgess Drive Menlo Park, California 94025 USA AAAI maintains compilation copyright for this technical report and retains the right of first refusal to any publication (including electronic distribution) arising from this AAAI event. Please do not make any inquiries or arrangements for hardcopy or electronic publication of all or part of the papers contained in these working notes without first exploring the options available through AAAI Press and AI Magazine (concurrent submission to AAAI and an another publisher is not acceptable). A signed release of this right by AAAI is required before publication by a third party. Distribution of this technical report by any means including electronic (including, but not limited to the posting of the papers on any Website) without permission is prohibited. ISBN 978-1-57735-295-2 WS-06-13 Manufactured in the United States of America Organizing Committee Gal A. Kaminka(cochair), Bar Ilan University, Israel ([email protected]) David V. Pynadath (cochair), ISI/University of Southern California ([email protected]) Christopher W. Geib (cochair), Honeywell Labs ([email protected]) Program Committee Dorit Avrahami Nate Blaylock Hung Bui Abigail Gertner Robert Goldman Henry Kautz Timo Steffens Matthew Stone This AAAI–06 Workshop was held July 17, 2006, in Boston, Massachusetts USA iii Contents Hybrid Symbolic-Probabilistic Plan Recognizer: Initial Steps / 1 Dorit Avrahami-Zilberbrand and Gal A. Kaminka Hierarchical Instantiated Goal Recognition / 8 Nate Blaylock and James Allen Tree-Based Policy Learning in Continuous Domains through Teaching by Demonstration / 16 Sonia Chernova and Manuela Veloso A Decision-Theoretic Model of Assistance / 22 Alan Fern, Sriraam Natarajan, Kshitij Judah, and Prasad Tadepalli Beyond Memories: Weaving Photos into Personal Social Networks / 29 Ting-hsiang Huang and Jane Yung-jen Hsu A Scene-based Imitation Framework for RoboCup Clients / 37 Kevin Lam, Babak Esfandiari, and David Tudino IPARS: Intelligent Portable Activity Recognition System via Everyday Objects, Human Movements, and Activity Duration / 44 Chi-yau Lin and Yung-jen Hsu Non-stationary Hidden Semi Markov Models in Activity Recognition / 53 Einat Marhasev, Meirav Hadad, and Gal A. Kaminka Hybrid User Model for Information Retrieval / 61 Hien Nguyen, Eugene Santos Jr., Nathan Smith, and Aaron Schuett v