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There are a total of 77 record(s) matching your query.
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Overview of the Langley subsonic research effort on SCR configuration
Author(s): Coe, P. L., Jr.; Thomas, J. D.; Huffman, J. K.; Weston, R. P.; Schoonover, W. E., Jr.; Gentry, C. L., Jr.
Abstract: Recent advances achieved in the subsonic aerodynamics of low aspect ratio, highly swept wing designs are summarized. The most significant of these advances was the development of leading edge deflection concepts which ...
NASA Center: Langley Research Center
Publication Year: 1980
Added to NTRS: 2007-03-09
Accession Number: 81N17982; Document ID: 19810009459
Fluorescence Spectroscopy of Gas-phase Polycyclic Aromatic Hydrocarbons
Author(s): Thomas, J. D.; Witt, A. N.
Abstract: The purpose of this investigation was to produce fluorescence spectra of polycyclic aromatic hydrocarbon (PAH) molecules in the gas-phase for comparison with blue luminescence (BL) emission observed in astrophysical sources ...
NASA Center: Goddard Space Flight Center
Publication Year: 2006
Added to NTRS: 2006-11-24
Document ID: 20060052467
Assessment of diastolic function by tissue Doppler echocardiography: comparison with standard transmitral and pulmonary venous flow
Author(s): Farias, C. A.; Rodriguez, L.; Garcia, M. J.; Sun, J. P.; Klein, A. L.; Thomas, J. D.
Abstract: The objective of this study was to determine the utility of Doppler tissue echocardiography in the evaluation of diastolic filling and in discriminating between normal subjects and those with various stages of diastolic ...
NASA Center: NASA (non Center Specific)
Publication Year: 1999
Added to NTRS: 2006-08-02
Document ID: 20040141867
New echocardiographic windows for quantitative determination of aortic regurgitation volume using color Doppler flow convergence and vena contracta
Author(s): Shiota, T.; Jones, M.; Agler, D. A.; McDonald, R. W.; Marcella, C. P.; Qin, J. X.; Zetts, A. D.; Greenberg, N. L.; Cardon, L. A.; Sun, J. P.; Sahn, D. J.; Thomas, J. D.
Abstract: Color Doppler images of aortic regurgitation (AR) flow acceleration, flow convergence (FC), and the vena contracta (VC) have been reported to be useful for evaluating severity of AR. However, clinical application of these ...
NASA Center: NASA (non Center Specific)
Publication Year: 1999
Added to NTRS: 2006-08-02
Document ID: 20040142011
Left ventricular endocardial surface detection based on real-time 3D echocardiographic data
Author(s): Corsi, C.; Borsari, M.; Consegnati, F.; Sarti, A.; Lamberti, C.; Travaglini, A.; Shiota, T.; Thomas, J. D.
Abstract: OBJECTIVE: A new computerized semi-automatic method for left ventricular (LV) chamber segmentation is presented. METHODS: The LV is imaged by real-time three-dimensional echocardiography (RT3DE). The surface detection model, ...
NASA Center: NASA (non Center Specific)
Publication Year: 2001
Added to NTRS: 2006-08-02
Document ID: 20040112520
Transesophageal echocardiography: first-line imaging for aortic diseases
Author(s): Yalcin, F.; Thomas, J. D.; Homa, D.; Flachskampf, F. A.
Abstract: Transesophageal echocardiography (TEE) is now commonly used to evaluate the thoracic aorta, because it is widely available and provides high-resolution images and flow information by Doppler. This article reviews the ...
NASA Center: NASA (non Center Specific)
Publication Year: 2000
Added to NTRS: 2006-08-02
Document ID: 20040141517
Quantification of mitral regurgitation by automated cardiac output measurement: experimental and clinical validation
Author(s): Sun, J. P.; Yang, X. S.; Qin, J. X.; Greenberg, N. L.; Zhou, J.; Vazquez, C. J.; Griffin, B. P.; Stewart, W. J.; Thomas, J. D.
Abstract: OBJECTIVES: To develop and validate an automated noninvasive method to quantify mitral regurgitation. BACKGROUND: Automated cardiac output measurement (ACM), which integrates digital color Doppler velocities in space and in ...
NASA Center: NASA (non Center Specific)
Publication Year: 1998
Added to NTRS: 2006-08-02
Document ID: 20040142216
Effect of scanline orientation on ventricular flow propagation: assessment using high frame-rate color Doppler echocardiography
Author(s): Greenberg, N. L.; Castro, P. L.; Drinko, J.; Garcia, M. J.; Thomas, J. D.
Abstract: Color M-mode echocardiography has recently been utilized to describe diastolic flow propagation velocity (Vp) in the left ventricle. While increasing temporal resolution from 15 to 200 Hz, this M-mode technique requires the ...
NASA Center: NASA (non Center Specific)
Publication Year: 2000
Added to NTRS: 2006-08-02
Document ID: 20040141547
Noninvasive estimation of transmitral pressure drop across the normal mitral valve in humans: importance of convective and inertial forces during left ventricular filling
Author(s): Firstenberg, M. S.; Vandervoort, P. M.; Greenberg, N. L.; Smedira, N. G.; McCarthy, P. M.; Garcia, M. J.; Thomas, J. D.
Abstract: OBJECTIVES: We hypothesized that color M-mode (CMM) images could be used to solve the Euler equation, yielding regional pressure gradients along the scanline, which could then be integrated to yield the unsteady Bernoulli ...
NASA Center: NASA (non Center Specific)
Publication Year: 2000
Added to NTRS: 2006-08-02
Document ID: 20040112673
New approaches to the Doppler echocardiographic assessment of diastolic function: from research laboratory to clinical practice
Author(s): Pasquet, A.; Garcia, M. J.; Thomas, J. D.
Abstract: Over the past decade, Doppler echocardiography has become a well-established tool for the diagnosis of left ventricular diastolic dysfunction. Unfortunately, in many clinical situations traditional Doppler indices of ...
NASA Center: NASA (non Center Specific)
Publication Year: 1999
Added to NTRS: 2006-08-02
Document ID: 20040088942
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