Publications
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A Case Study in Engineering a Knowledge Base for an Intelligent Personal Assistant
We present a case study in engineering a large knowledge base (KB) to meet the requirements of a personal assistant. We discuss our KB development methodology and the engineering challenges…
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Localization in Horizontal-Only Ambisonic Systems
We test the localization of horizontal-only Ambisonic reproduction systems using various test signals to separately evaluate low-frequency and mid-frequency localization.
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Infusing IT/STEM Skill Standards in Informal ITEST Learning
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A Study in Machine Learning from Imbalanced Data for Sentence Boundary Detection in Speech
We have constructed a hidden Markov model (HMM) system to detect sentence boundaries that uses both prosodic and textual information. Since there are more non-sentence boundaries than sentence boundaries in…
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Morphology-based Language Modeling for Conversational Arabic Speech Recognition
In this paper, we investigate improvements in Arabic language modeling by developing various morphology-based language models. We present four different approaches to morphology-based language modeling, including a novel technique called…
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Presentation of Information for Link Analysis
SRI's LAW (Link Analysis Workbench) is a system that helps intelligence analysts detect occurrences of situations of interest by finding pattern instances in vast amounts of data using graph edit…
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Posture-based data protection
We introduce Posture-Based Data Protection (PBDP), which encrypts data using keys available to a device only when it has been verified to be in a known good state, and has…
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Assessing Local Item Dependence In Building Explanation Tasks (Padi Technical Report 14)
A common practice in the assessment of science education is to have a shared stimulus followed by a number of questions. In these cases, one might doubt the usual assumption…
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QASR: Question Answering Using Semantic Roles for Speech Interface
In this paper, we evaluate a semantic role labeling approach to the extraction of answers in the open domain question answering task. We show that this technique especially improves the…
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Machine Translation Research at SRI
An outline of the many machine translation research programs at SRI in 2006.
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Improved Speech Activity Detection Using Cross-Channel Features for Recognition of Multiparty Meetings
We describe the development of a speech activity detection system using an HMM-based segmenter for automatic speech recognition on individual headset microphones in multispeaker meetings. We look at cross-channel features…
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Speaker Clustered Regression-Class Trees for MLLR Adaptation
A speaker clustering algorithm is presented that is based on an eigenspace representation of Maximum Likelihood Linear Regression (MLLR) transformations and is used for training cluster-dependent regression-class trees for MLLR…