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In this informational paper, we propose the analysis steps required under the National Institute of Standards (NIST) process for information security certification and accreditation (C&A) to enable commercial unmanned air systems (UAS) operations in the National Airspace System (NAS). The initial work performed in RTCA Special Committee (SC) 203 has provided insight into the need to support the...
The Flight Mirror Assembly (FMA) mechanical design for NASA's next major x-ray telescope mission, the International X-Ray Observatory (IXO), recently kicked off at NASA. The design presents some unique engineering challenges requiring a novel mirror design due to the high angular resolution and large effective area required to achieve the desired scientific objectives. The Wolter-I x-ray telescope...
The International X-ray Observatory (IXO) is a new collaboration between NASA, ESA, and JAXA which is under study for launch in 2020. IXO will be a large 6600 kilogram Great Observatory-class mission which will build upon the legacies of the Chandra and XMM-Newton X-ray observatories. It combines elements from NASA's Constellation-X program and ESA's XEUS program. The observatory will have a 20-25...
In mammals, the suprachiasmatic nucleus (SCN) is the master circadian pacemaker. Within the caudal hamster SCN, a cluster of neurons containing the calcium binding protein, calbindin-D28K (CB), has been implicated in circadian locomotion. However, calbindin-immunoreactive (CB+) neurons in the calbindin subnucleus (CBsn) do not display a circadian rhythm in spontaneous firing [Eur J Neurosci 16 (2002)...
The adsorption of dimethylethylaminealane (Me 2 EtN AlH 3 or DMEAA) on clean and oxidized Al(111), its subsequent thermal decomposition, and reaction with ammonia (NH 3 ) to form aluminum nitride (AlN) was studied using temperature-programmed desorption (TPD), Auger electron spectroscopy (AES), and reactive scattering. DMEAA physisorbs on clean Al(111) at 130 K in ultra-high...
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