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[1] Okmok volcano, located on Umnak Island in the Aleutian chain, Alaska, is the most eruptive caldera system in North America in historic time. Its most recent eruption occurred in 1997. Synthetic aperture radar interferometry shows deflation of the caldera center of up to 140 cm during this time, preceded and followed by inflation of smaller magnitude.(More)
Towards the development of a useful mechanism for hydrogen storage, we have studied the hydrogenation of single-walled carbon nanotubes with atomic hydrogen using core-level photoelectron spectroscopy and x-ray absorption spectroscopy. We find that atomic hydrogen creates C-H bonds with the carbon atoms in the nanotube walls, and such C-H bonds can be(More)
multiband modeling of quantum electron transport through layered semiconductor devices, catalyst activity of water-assisted growth of single walled carbon nanotube forest characterization by a statistical and macroscopic approach, ABSTRACT: A high-performance millimeter-wave feed, designed for a broad-band radiometry application is presented. The feed(More)
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