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    FederalEfficient Keyword-Based Search for Top-K Cells in Text CubeNational Aeronautics and Space Administration — Previous studies on supporting free-form keyword queries over RDBMSs provide users with linked-structures (e.g.,a set of joined tuples) that are relevant to a given...
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    FederalModeling of Activities as Fuzzy Temporal Multivariable ProblemsNational Aeronautics and Space Administration — Smart Home resident may be an Alzheimer patient needing continuous assistance and care giving. Because of forgetfulness, this person may realize activities of daily...
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    FederalAccelerated Aging Experiments for Prognostics of Damage Growth in Composite MaterialsNational Aeronautics and Space Administration — Composite structures are gaining importance for use in the aerospace industry. Compared to metallic structures their behavior is less well understood. This lack of...
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    Federalν-Anomica: A Fast Support Vector based Novelty Detection TechniqueNational Aeronautics and Space Administration — In this paper we propose ν-Anomica, a novel anomaly detection technique that can be trained on huge data sets with much reduced running time compared to the benchmark...
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    FederalUsing Decision Trees to Detect and Isolate Leaks in the J-2XNational Aeronautics and Space Administration — Full title: Using Decision Trees to Detect and Isolate Simulated Leaks in the J-2X Rocket Engine Mark Schwabacher, NASA Ames Research Center Robert Aguilar, Pratt...
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    FederalAn Overview of Selected Prognostic Technologies with Reference to an Integrated PHM ArchitectureNational Aeronautics and Space Administration — This chapter reviewed generic prognosis algorithmic approaches and introduced some of the basics associated with probabilistic predictions and a required architecture...
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    FederalUnsupervised Anomaly Detection for Liquid-Fueled Rocket Prop...National Aeronautics and Space Administration — Title: Unsupervised Anomaly Detection for Liquid-Fueled Rocket Propulsion Health Monitoring. Abstract: This article describes the results of applying four...
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    FederalMarkov Modeling of Component Fault Growth Over A Derived Domain of Feasible Output Control Effort ModificationsNational Aeronautics and Space Administration — This paper introduces a novel Markov process formulation of stochastic fault growth modeling, in order to facilitate the development and analysis of prognostics-based...
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    FederalSparse Solutions for Single Class SVMs: A Bi-Criterion ApproachNational Aeronautics and Space Administration — In this paper we propose an innovative learning algorithm - a variation of One-class Support Vector Machines (SVMs) learning algorithm to produce sparser solutions...
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    FederalIntelligent Temporal Data Driven World Actuation in Ambient Environments Case Study: Anomaly Recognition and Assistance Provision in Smart HomeNational Aeronautics and Space Administration — Abstract — A possible resident of smart home is an old person or an Alzheimer patient that should be assisted continuously for the rest of his life; however, normally...
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    FederalEfficient Matlab ProgramsNational Aeronautics and Space Administration — Matlab has a reputation for running slowly. Here are some pointers on how to speed computations, to an often unexpected degree. Subjects currently covered: Matrix...
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    FederalPredicting Engine Parameters using the Optical SpectrumNational Aeronautics and Space Administration — The Optical Plume Anomaly Detection (OPAD) system is under development to predict engine anomalies and engine parameters of the Space Shuttle's Main Engine (SSME)....
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    FederalA Survey of Health Management User Objectives in Aerospace Systems Related to Diagnostic and Prognostic MetricsNational Aeronautics and Space Administration — One of the most prominent technical challenges to effective deployment of health management systems is the vast difference in user objectives with respect to...
