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  • METEOROLOGY AND CLIMATOLOGY  (26)
  • Life Sciences (General)  (21)
  • *Anaphase
  • 1995-1999  (16)
  • 1990-1994  (21)
  • 1980-1984  (11)
  • 1
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    Posterior mediastinal masses: rare causes of cardiac compression (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: No abstract available
    Keywords: Life Sciences (General)
    Type: American heart journal (ISSN 0002-8703); Volume 124; 2; 523-6
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  • 2
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    Comparison of the Physiology of the Spaceflight and Hindlimb Suspended Rat (1994)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Description: The suspended rat has been used extensively as a simulation of the spaceflight animal. In suspension, hindlimbs are unloaded from the acceleration of gravity, much as they are in spaceflight. Comparisons of data from spaceflight (microgravity) and suspended (1G) rats have suggested that suspension my be an appropriate model, but no direct comparisons had been made between the spaceflight and suspended rat. Cosmos 2044 afforded the first opportunity to directly compare the effects of hindlimb suspension (HS) and spaceflight (SF) on a broad range of physiological and histological parameters. This paper reports on the comparison of skelton, skeletal muscle, heart, neural, pulmonary, kidney, liver, intestine, blood plasma, immune function, red blood cells, and endocrine and reproductive functions and systems.
    Keywords: Life Sciences (General)
    Type: US Experiments Flown on the Soviet Biosatellite Cosmos 2044; 273-281; NASA-TM-108802
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  • 3
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    A system for low field imaging of laser-polarized noble gas (1999)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: We describe a device for performing MRI with laser-polarized noble gas at low magnetic fields (〈50 G). The system is robust, portable, inexpensive, and provides gas-phase imaging resolution comparable to that of high field clinical instruments. At 20.6 G, we have imaged laser-polarized (3)He (Larmor frequency of 67 kHz) in both sealed glass cells and excised rat lungs, using approximately 0.1 G/cm gradients to achieve approximately 1 mm(2) resolution. In addition, we measured (3)He T(2)(*) times greater than 100 ms in excised rat lungs, which is roughly 20 times longer than typical values observed at high ( approximately 2 T) fields. We include a discussion of the practical considerations for working at low magnetic fields and conclude with evidence of radiation damping in this system. Copyright 1999 Academic Press.
    Keywords: Life Sciences (General)
    Type: Journal of magnetic resonance (San Diego, Calif. : 1997) (ISSN 1090-7807); Volume 141; 2; 217-27
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  • 4
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    Investigation of arc cloud lines (1984)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The natural mechanisms that lead to the development of deep convective storms through the integration of radio scan satellite data with research aircraft observations is discussed. The aircraft measurements are designed to provide detailed air motion and thermodynamic data near and in the arc cloud line region at the same time GOES rapid scan data is taken. Inspection of the data indicates: (1) Arc cloud lines are important in both the production of convergence and vorticity, and in the interaction with intense thunderstorms which may act to trigger tornado activity. (2) The lateral extent of the vertical motion field compared to the cloud scale indicates that the main driving force for the initial cloud development along the arc-line is controlled by the thunderstorm outflow(s) interacting with the convectively unstable air of the environment. (3) Arc cloud lines and their associated DSL region can pose extreme hazards to aircraft operations. (4) An arc cloud line's major threat to space shuttle operations lie in its ability to generate new thunderstorm activity along the shuttle glide path.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Marshall Space Flight Center NASA(MSFC FY-84 Atmospheric Processes Res. Rev.; p 197-199
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  • 5
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    Use of satellite soundings and imagery for nowcasting and very-short-range forecasting (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Examples of GOES-East satellite imagery and sounding channel information are used to show how atmospheric behavior in the vicinity of intense mesoscale weather events can be analyzed. Mesoscale spatial and temporal information on atmospheric thermal structure and moisture distribution can be determined using satellite sounding and multispectral image data. Clouds and cloud patterns in a satellite image or animated series of images represent the integrated effect of ongoing dynamic and thermodynamic processes in the atmosphere. When information from satellite data is combined with radar, surface and upper air observations, important processes in storm development can be better understood.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: ESA Nowcasting 2. Mesoscale Observations and Very-Short-Range Weather Forecasting; p 99-111
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  • 6
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    Investigations of severe/tornadic thunderstorm development and evolution based on satellite and AVE/SESAME/VAS data (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The use of rapid scan satellite imagery to investigate the local environment of severe thunderstorms is discussed. Mesoscale cloud tracking and vertical wind shear as it affects thunderstorm relative flow are mentioned. The role of pre-existing low level cloud cover in the outbreak of tornadoes was investigated. Applying visible atmospheric sounding imagery to mesoscale phenomena is also addressed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-CR-174154 , NAS 1.26:174154
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  • 7
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    Error determination of a successive correction type objective analysis scheme (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The Purdue Regional Objective Analysis of the Mesoscale (PROAM) is a successive correction type scheme for the analysis of surface meteorological data. The scheme is subjected to a series of experiments to evaluate its performance under a variety of analysis conditions. The tests include use of a known analytic temperature distribution to quantify error bounds for the scheme. Similar experiments were conducted using actual atmospheric data. Results indicate that the multiple pass technique increases the accuracy of the analysis. Furthermore, the tests suggest appropriate values for the analysis parameters in resolving disturbances for the data set used in this investigation.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Atmospheric and Oceanic Technology (ISSN 0739-0572); 1; 120-130
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  • 8
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    HF Doppler and VHF radar observations of upper atmospheric disturbances caused by weak cold front during winter time (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The simultaneous use of the Taiwan VHF radar and the HF Doppler sounder for remote measurement of three-dimensional winds, gravity waves, and density perturbations at mesospheric and thermospheric heights is demonstrated. A special event of atmospheric disturbances caused by propagating gravity waves excited by weak convective motions in winter time were investigated. The three-dimensional wind velocities at different heights were determined, and the frequency, horizontal wavelength, vertical wavelength, and phase velocity of the gravity waves were measured. The subtropical, low-latitude site makes the VHF radar and HF Doppler array systems unique, and the observations especially valuable for space projects dealing with low-latitude atmosphere.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: AIAA PAPER 90-0483
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  • 9
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    Convective scale weather analysis and forecasting (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: How satellite data can be used to improve insight into the mesoscale behavior of the atmosphere is demonstrated with emphasis on the GOES-VAS sounding and image data. This geostationary satellite has the unique ability to observe frequently the atmosphere (sounders) and its cloud cover (visible and infrared) from the synoptic scale down to the cloud scale. These uniformly calibrated data sets can be combined with conventional data to reveal many of the features important in mesoscale weather development and evolution.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-CR-174185 , NAS 1.26:174185
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  • 10
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    Low-field MRI of laser polarized noble gas (1998)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: NMR images of laser polarized 3He gas were obtained at 21 G using a simple, homebuilt instrument. At such low fields magnetic resonance imaging (MRI) of thermally polarized samples (e.g., water) is not practical. Low-field noble gas MRI has novel scientific, engineering, and medical applications. Examples include portable systems for diagnosis of lung disease, as well as imaging of voids in porous media and within metallic systems.
    Keywords: Life Sciences (General)
    Type: Physical review letters (ISSN 0031-9007); 81; 17; 3785-8
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