Tape Wire Research Articles

Surgical Management of Digital Gryposis Syndrome in a Goshawk (Accipiter gentilis gentilis)

Digital gryposis syndrome is an acquired abnormal curvature of the digits due to an unknown etiology. Past medical therapeutic efforts have had limited success, with occasional reports of spontaneous recoveries. Unilateral digital flexor tendon hypertension was identified as the cause of the presenting signs in the goshawk reported in this paper. Tenectomy was performed on the flexor perforatus digiti III, flexor perforans et perforatus digiti III, and flexor perforatus digiti IV tendons. A foot cast fashioned from elastic bandaging tape, epoxy, and aluminum wire was applied for 4 weeks. Fourteen weeks after the operation, the goshawk exhibited a normal stance and good coordination.

Anisotropy of critical current density in the superconducting Nb3Sn tape wires

Presentation de resultats experimentaux sur des couches de Nb 3 Sn prepares par la methode de diffusion bronze

Nb<inf>3</inf>Sn composites with submicrometer filaments

New fabrication techniques have been developed to produce a homogeneous array of very long - very thin filaments of Nb 3 Sn in a Cu matrix. With the use of chill casting and drawing techniques one can produce a superconducting composite wire 0.025 cm in diameter which has approximately 500,000 Nb 3 Sn filaments uniformly distributed across the cross section. Typically the filaments have a ribbon shape about 200A thick and 4000A wide. Critical currents based on the total area are greater than 106A/cm2in zero field and greater than 104A/cm2at 14 Tesla so the performance compares favorably with commercial tape or commercial multifilamentary wire. Special features of the material are the ease of fabrication, the low reaction temperatures (500&degC), strain tolerance, and the strength of the material.

Surge propagation in three-phase pipe-type cablesߞPart II: Duplication of field tests including the effects of neutral wires and pipe saturation

Field tests of surge propagation in 69-kV pipe-type cables are successfully duplicated using an analytical model. The solution techniques are general and can be applied for any waveshape or travel time. Included in the model are the effects of shield tape and skid wires. Proximity effects in the cable elements are represented. In addition to field-test comparisons, the effects of different elements in the model are illustrated by computing the step responses. These models can be used in digital transients programs and Transient Network Analyzer (TNA) studies to determine proper insulation and protection requirements in cable systems for lightning and switching surge transient overvoltages.