NASA Scientific and Technical Aerospace Reports - The University ...

Congress emphasized regional Commander in Chiefs (CINCs) roles with the passage of the Goldwater-Nichols Act of 1986.
Now that the Soviet Union and the Warsaw Pact have collapsed, there has been a total refocusing of national policy and
strategy. Regional actors and regional stability will ensure the protection of U.S. vital security interests. The nuclear mission
is still part of a changing U.S. deterrence strategy. USSTRATCOM’s mission is best managed by a regional CINC; staff
functions can be accomplished elsewhere. In addition, merging USSTRATCOM with USSPACECOM will provide functional
and fiscal advantages given the proper political context.
DTIC
Command and Control; International Relations; Politics; United States
20100016372 Research Associates for Defense Conversion, Inc., Marcy, NY USA
Speaker Recognition on Lossy Compressed Speech Using the Speex Codec
Stauffer, A. R.; Lawson, A. D.; The Proceedings of the 10th Annual Conference of the International Speech Communication
Association: Interspeech 2009; September 2009, pp. 2363 - 2366; In English; 10th Annual Conference of the International
Speech Communication Association: Interspeech 2009 Brighton,6-10Sep. 2009, Brighton, UK, UK; Original contains color
illustrations
Contract(s)/Grant(s): FA8750-05-C-0029; Proj-1049; 35885G
Report No.(s): AD-A516549; AFRL-RI-RS-TP-2009-45; No Copyright; Avail.: Defense Technical Information Center
(DTIC)
This paper examines the impact of lossy speech coding with Speex on GMM-UBM speaker recognition (SR). Audio from
120 speakers was compressed with Speex into twelve data sets, each with a different level of compression quality from 0 (most
compressed) to 10 (least), plus uncompressed. Experiments looked at performance under matched and mismatched
compression conditions, using models conditioned for the coded environment, and Speex coding applied to improving SR
performance on other coders. Results show that Speex is effective for compression of data used in SR and that Speex coding
can improve performance on data compressed by the GSM codec.
DTIC
Coders; Decoders; Speech Baseband Compression; Voice Data Processing
20100016375 Research Associates for Defense Conversion, Inc., Marcy, NY USA
Long Term Examination of Intra-Session and Inter-Session Speaker Variability
Lawson, A. D.; Stauffer, A. R.; Smolenski, B. Y.; Pokines, B. B.; Leonard, M.; Cupples, E. J.; The Proceedings of the
10thAnnual Conference of the International Speech Communication Association: Interspeech 2009; September 2009,
pp. 2899 - 2902; In English; FROM 10th Annual Conference of the International Speech Communication Association:
Interspeech 2009, 6-10Sep. 2009, Brighton, UK, UK; Original contains color illustrations
Contract(s)/Grant(s): FA8750-05-C-0029
Report No.(s): AD-A516541; No Copyright; Avail.: Defense Technical Information Center (DTIC)
Session variability in speaker recognition is a well recognized phenomena, but poorly understood largely due to a dearth
of robust longitudinal data. The current study uses a large, long-term speaker database to quantify both speaker variability
changes within a conversation and the impact of speaker variability changes over the long term (3 years). Results demonstrate
that 1) change in accuracy over the course of a conversation is statistically very robust and 2) that the aging effect over three
years is statistically negligible. Finally we demonstrate that voice change during the course of a conversation is, in large part,
comparable across sessions.
DTIC
Variability
20100017112 Iowa Univ. - IIHR, Iowa City, IA, USA
Autonomous Measurements of Bridge Pier and Abutment Scour Using Motion-Sensing Radio Transmitters
Papanicolaou, T.; Elhakeem, M.; January 2010; 40 pp.; In English
Report No.(s): PB2010-105879; TR-595; No Copyright; Avail.: National Technical Information Service (NTIS)
Scour around the foundations (piers and abutments) of a bridge due to river flow is often referred to as ‘bridge scour’.
Bridge scour is a problem of national scope that has dramatic impacts on the economy and safety of the traveling public.
Bridge scour has resulted in more bridge failures than all other causes in recent history. In this study the investigators proposed
the use of Radio Frequency IDentification (RFID) technology to collect field data and remotely monitor bridge scour during
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