This document is disseminated under the sponsorship of the Department of Transportation in the interest of information exchange. The United States Government assumes no liability for its contents or use thereof. Surveillance in today's National Airspace System (NAS) is provided by a system of terminal and en route radars. The separation distance that an air traffi c controller is required to ma...

Although the performance of state-of-the-art automatic speech recognition systems on the challenging task of broadcast news transcription has improved considerably in recent years, many of the systems operate in 130-300 times real-time [1]. Many applications of automatic transcription of broadcast news, eg. closedcaption subtitles for television broadcasts, require real-time operation. This pap...

Automatic Broadcast News Speech Summarization

This paper describes the SoVideo broadcast news retrieval system for Mandarin Chinese. The system is based on technologies such as large-vocabulary continuous speech recognition for Mandarin Chinese, automatic story segmentation, and information retrieval. Currently, the database consists of 177 hours of broadcast news, which yields 3264 stories by automatic story segmentation. We discuss the d...

This paper presents our recent research work on applying probabilistic generative models to Mandarin Chinese broadcast news retrieval and summarization. Most models can be trained in either a supervised or unsupervised manner. In addition, both literal term matching and concept matching strategies have been intensively investigated. This paper also presents a prototype web-based Mandarin Chines...

Precise time synchronization is an essential element for APNT technologies, such as wide area multilateration (WAM) and passive pseudo-ranging. The goal is to provide a time service/source that allows APNT technologies to support a required navigation performance 0.3 (RNP 0.3) and provides the navigation integrity and accuracy for surveillance systems that is required for three-mile aircraft se...

In Alzheimer’s disease (AD) two aberrant proteins amyloid plaques (Aβ) and Neurofibrillary tangles (NFTs) have been identified. Aβ peptide is produced from soluble amyloid precursor protein (SAPP) as a result of two sequential proteolysis steps by β-secretase [beta-site Amyloid Precursor Protein Cleaving Enzyme (BACE)] then γ-secretase. NFTs, are made up of several proteins but primarily hypoph...

A significant bottleneck in the current air traffic system occurs at the runway. Expanding airports and adding new runways will help solve this problem; however, this comes at a significant cost, financially, politically and environmentally. A complementary solution is to safely increase the capacity of current runways. This can be achieved by precise spacing at the runway threshold with a resu...

We have examined molecular and physiological principles underlying the lightdependency of defence activation in Arabidopsis plants challenged with the bacterial pathogen Pseudomonas syringae. Within a fixed light/dark cycle, plant defence responses and disease resistance significantly depend on the time of day when pathogen contact takes place. Morning and midday inoculations result in higher s...