Publications
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Entropy-based Pruning of Backoff Language Models
A criterion for pruning parameters from N-gram backoff language models is developed, based on the relative entropy between the original and the pruned model. It is shown that the relative…
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The Development of SRI’s 1997 Broadcast News Transcription System
This paper describes SRI's 1997 broadcast news transcription system used for the 1997 DARPA H4 evaluations. Our system had several novel components. We briefly describe these features and give comparative…
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New Developments in Lattice-Based Search Strategies in SRI’s Hub4 System
We describe new developments in SRI's lattice-based progressive search strategy. These developments include the implementation of a new bigram lattice algorithm, lattice optimization techniques, and expansion of bigram lattices to…
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Counselor Simulation Guide, Levels 1-3
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Reasoning about Locations in Theory and Practice
This paper addresses both theoretical and practical issues relevant to reasoning about locations. Techniques for the efficient operationalization of the belief revision rules in planning frameworks are presented.
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Scalable Integration Of Educational Software: Exploring The Promise Of Component Architectures
We describe an exploratory effort in which four research groups produced software components for the mathematics of motion.
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Coordinating Planning Activity and Information Flow in a Distributed Planning System
Distributed SIPE (DSIPE) is a distributed planning system that provides decision support to human planners in a collaborative planning environment.
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The Mathematics Of Change And Variation From A Millennial Perspective: New Content, New Context
We shall examine large-scale trends in content changes and in context changes for learning and using mathematics. From this set of factors, we raise three questions.
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Transformation And Transition: Education For The 21st Century
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Hybrid Planning: An Approach to Integrating Generative and Case-Based Planning
This paper describes ongoing research on the development of a hybrid planning system that integrates case-based reasoning (CBR) methods into SIPE-2, a generative planning system.
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Towards a Framework for Continuous Planning and Execution
This paper reports on the first phase of the Continuous Planning and Execution Framework (CPEF), a system that employs sophisticated plan generation, execution, monitoring, and repair capabilities to solve complex…
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Connecting With The Twenty-First Century: Technology In Support Of Educational Reform
We present an alternative image of what schools might be like and a set of interlocking social, pedagogical and technological changes that could transform the educational enterprise.