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Presents a study which investigated the niobium nitride/silicon/niobium tunnel junctions with hydrogenated amorphous silicon barriers for several hydrogen concentrations used during barrier deposition. Information on the penetration depth of the niobium nitride-base electrode material; Results of hydrogen doping of the siicon barrier; Increase in the barrier height with increasing hydrogen concentrations in the sputter gas.

Provides information on a study which investigated the properties of rf-magnetron-sputtered niobium nitride (NbN) for substrate temperatures as a function of the partial pressure of methane introduced into a sputtering gas mixture. Effect of hydrogen doping on NbN; Factors that make an attractive junction electrode material; Preparation for the NbN films used; Definition of substrate temperature.

Presents a study that examined the stability of bismuth-lead-strontium-carbon-copper-oxygen phase contained in silver-sheathed oxide-powder-in-tube specimens. Use of x-ray diffraction, transmission electron microscopy and energy dispersive x-ray analysis; Effect of silver cladding on lead stability and microstructure; Discussion on the transmission electron microscopy micrographs of a sample annealed in the single phase region.

Investigates the structural properties of niobium nitride (NbN) films as a function of vacuum and rapid thermal annealing. Applications of niobium and NbN superconducting materials and devices; Deposition of the NbN films in an ultrahigh vacuum radio frequency magnetron sputtering system; Electrical characterization of the annealed samples.

Investigates the superconducting and structure properties of rf magnetron sputtered niobium nitride (NbN) films prepared at eleveted temperatures as a function of rf substrate bias. Effect of substrate bias on low-temperature resistivity; Details on the preparation of NbN films; Measurements of superconducting temperatures.

Large defects of the nasal tip with exposure of the underlying cartilage pose a significant reconstructive challenge to the plastic surgeon. Objective: This article presents a case of a large nasal tip defect following basal cell excision that was successfully treated with Integra bilayer wound matrix and skin grafting. Methods: Following tumor excision, meshed Integra bilayer wound matrix was placed over the exposed nasal tip cartilage. After 4 weeks, the silicone layer was removed and a full-thickness graft placed on the nasal tip. Results: This reconstruction resulted in the restoration of patient's nasal tip with good contour and color match without the need for a forehead flap. Conclusion: This demonstrates the reconstructive potential of this modality in patients who are not candidates for reconstruction with a forehead flap. [ABSTRACT FROM AUTHOR]

Two 3-rn long, single-phase cables have been fabricated by Ultera from second generation (2G) superconductor wire supplied by American Superconductor. The first cable was made with two layers of 2G tape conductor and had a critical current of 5,750 A while the second cable had four layers and a critical current of 8,500 A. AC loss was measured for both cables at ac currents of up to 4 kArms. Ultera performed initial fault current studies of both cables in Denmark with limited currents in the range from 9.1 to 44 kA. Results from these tests will provide a basis for a 25-m long, three-phase, prototype cable to be tested at ORNL early next year and a 300-rn long, fault current limiting, superconducting cable to be installed in a Consolidated Edison substation in New York City. [ABSTRACT FROM AUTHOR]