77 research outputs found
Transport properties and microstructure of mono- and seven-core wires of FeSe1-xTex superconductor by Fe-diffusion powder-in-tube method
We report the successful fabrication of mono- and seven-core superconducting
wires of FeSe1-xTex using an in-situ Fe-diffusion process based on the
powder-in-tube (Fe-diffusion PIT) method. The reacted layer in these wires were
found to have composite structure with composition nearly FeSe and FeTe for the
inner and outer layers, although a single layer of composition FeSe0.5Te0.5 was
supposed to be formed. The self-field transport Jc values at 4.2 K were found
to be 226.2 A/cm2 and 100.3 A/cm2 respectively for mono- and seven-core wires.
The Jc's of mono- and seven-core wires dropped rapidly at low fields and then
showed a gradual decrease with increasing magnetic fields. In addition, the
seven-core wire showed higher Jc than the mono-core wire under higher magnetic
fields, indicating that the seven-core wire of FeSe1-xTex superconductor using
Fe-diffusion PIT method is advantageous for the superconducting-wire
application under high magnetic fields.Comment: 19 pages, 6 figure
Fabrication of binary FeSe superconducting wires by novel diffusion process
We report successful fabrication of multi- and mono-core FeSe wires with high
transport critical current density Jc using a simple in-situ Fe-diffusion
process based on the powder-in-tube (Fe-diffusion PIT) method. The seven-core
wire showed transport Jc of as high as 1027 A/cm2 at 4.2 K. The superconducting
transition temperature Tczero was observed at 10.5 K in the wire-samples, which
is about 2 K higher than that of bulk FeSe. The Fe-diffusion PIT method is
suitable for fabricating multi-core wires of the binary FeSe superconductors
with superior properties.Comment: 14 pages, 5 figure
Prediction of anastomotic leakage
Background : Anastomotic leakage after esophagectomy is significantly associated with more severe complications, such as sepsis and mortality. Early prediction for anastomotic leakage is usually difficult and needs to be treated rapidly. In the current study, we investigated the correlation between hemodynamic and several complications after esophagectomy in patients with esophageal cancer, using the FloTrac system. Materials and Methods : Between April 2013 and December 2014, 39 patients with a mean age of 66.6 ± 8.9 years underwent postoperative supervision using the FloTrac sensor / Vigileo monitoring system after curative surgery for esophageal cancer. We retrospectively evaluated the association between the number of aberrant cardiac index (CI) along with stroke volume variability (SVV) values and clinicopathological parameters of postoperative complications in this report. Results : There were significant positive correlations between the number of aberrant values of CI along with SVV and depth of invasion during pathological stage. Concerning major postoperative complications, there was a significant positive correlation between the number of aberrant values of CI and anastomotic leakage. Discussion: The hemodynamic change by employing the FloTrac system could predicts the complication of anastomotic leakage after esophagectomy. Adequate management of hemodynamic stability by utilizing it will reduce the complications of anastomotic leakage
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