3 results match your criteria: "The Universities Space Research Association[Affiliation]"
Improved Sea Ice Fraction Characterization for L-Band Observations by the Aquarius Radiometers.
IEEE Trans Geosci Remote Sens
March 2017
Cryospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771 USA, and also with the Universities Space Research Association, Goddard Earth Sciences Technology and Research Studies and Investigations, Columbia, MD 21044 USA.
Radiometers operating at L-band (1.4 GHz) are used to retrieve sea surface salinity over ice-free oceans and have been used recently to study the cryosphere. One hindrance of their use in the high latitudes is the preponderance of mixed scenes, where seawater and sea ice are both present in the sensor's field of view (FOV).
View Article and Find Full Text PDFSharpening the tandem walking test for screening peripheral neuropathy.
South Med J
October 2013
From the Bobby R. Alford Department of Otolaryngology-Head and Neck Surgery, the Department of Obstetrics and Gynecology, and the Department of Neurology, Baylor College of Medicine, the Universities Space Research Association, the Wyle Science, Technology and Engineering Group, and the Neuroscience Research Laboratories, NASA/Johnson Space Center, Houston, Texas.
Objective: Few tests of functional motor behavior are useful for rapidly screening people for lower extremity peripheral neuropathy. The goal of this study was to improve the widely used tandem walking (TW) test.
Methods: We tested "normal" (control) adult and ambulatory patients with peripheral neuropathy (PN) with their eyes open and eyes closed while they performed TW on industrial carpeting in sock-covered feet.
Stochastic properties of radiation-induced DSB: DSB distributions in large scale chromatin loops, the HPRT gene and within the visible volumes of DNA repair foci.
Int J Radiat Biol
November 2008
The Universities Space Research Association, Division of Space Life Sciences, Houston, Texas, USA.
Purpose: We computed probabilities to have multiple double-strand breaks (DSB), which are produced in DNA on a regional scale, and not in close vicinity, in volumes matching the size of DNA damage foci, of a large chromatin loop, and in the physical volume of DNA containing the HPRT (human hypoxanthine phosphoribosyltransferase) locus.
Materials And Methods: The model is based on a Monte Carlo description of DSB formation by heavy ions in the spatial context of the entire human genome contained within the cell nucleus, as well as at the gene sequence level.
Results: We showed that a finite physical volume corresponding to a visible DNA repair focus, believed to be associated with one DSB, can contain multiple DSB due to heavy ion track structure and the DNA supercoiled topography.