A5038313975- Superconducting Materials and Applications
- Physics of Superconductivity and Magnetism
- Mechanical stress and fatigue analysis
- Superconductivity in MgB2 and Alloys
- Magnetic Properties and Applications
- Thermal Analysis in Power Transmission
- Cryospheric studies and observations
- COVID-19 Digital Contact Tracing
- Landslides and related hazards
- High-pressure geophysics and materials
- Non-Destructive Testing Techniques
- Vibration and Dynamic Analysis
- Rock Mechanics and Modeling
- COVID-19 Impact on Reproduction
- Surface and Thin Film Phenomena
- Geotechnical Engineering and Underground Structures
- Silicon Carbide Semiconductor Technologies
- Concrete Corrosion and Durability
- Neonatal Respiratory Health Research
Shizuoka City Hospital
2023
Kyoto University
2006-2012
A method to estimate the thermally induced residual strain accumulation under varying temperature in a Bi2223/Ag/Ag alloy composite superconductor was presented, which mechanical property values measured from stress–strain curves of samples with different states, value Bi2223 filaments tape at room by x-ray diffraction and reported coefficients thermal expansion constituents (Bi2223, Ag alloy) relevant range were incorporated. This applied change all high critical current type fabricated...
Mechanical and electromagnetic stresses are exerted on Bi2223∕Ag∕Ag alloy superconducting composite tapes during fabrication∕winding operation, which cause reduction in critical current when the Bi2223 filaments damaged. In damage process, thermally induced residual strain fracture of play a dominant role. The aim present work was to propose comprehensive method for estimation these values quantitative description relation applied bending∕tensile strain, examine accuracy comparison with...
We present a new modeling approach to describe the relation between critical current and applied bending strain of multifilamentary Bi2223/Ag/Ag alloy superconducting composite tape. In model, shape core, in which Bi2223 filaments that transport are embedded Ag, damage parameter, defined as difference intrinsic tensile fracture residual sample length direction (= direction), combined with exerted distribution bent sample. The extent core corresponding expressed function strain. describes...
The critical current at 77 K of multifilamentary Bi2223 composite tape was studied under applied tensile strain experimentally and analytically. Beyond the irreversible strain, currents (IC) decreased significantly with increasing (εc), due to enhanced cracking filaments. voltage generation in voltage–current relation calculated by share model which transport is shared filament Ag near cracked portion. Then estimated a 1 µV cm−1 criterion. By application experimental result, effective crack...
A modeling study was carried out to provide a description of the critical current distribution bent multifilamentary Bi2223/Ag/Ag alloy superconducting composite tape samples. In modeling, difference between tensile fracture strain Bi2223 filaments along sample length under no residual and used as unifying parameter for damage evolution. The treated be different from also position in each sample. statistics were combined with shape core exerted filaments, which relation heterogeneous...
The change in n-value and critical current with bending strain the relation of to bending-damaged Bi2223 composite tape were studied experimentally analytically. filamentary decreased very slightly increasing decreasing current, comparison that tension-damaged tape. To describe experimental result for tape, a damage evolution model was applied which steep tensile-strain variation thickness direction, shape core into superconducting filaments are bundled parameters obtained from analysis...
To the Editors: We present a case of neonate suspected to have acquired severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection from neonatal intensive care unit (NICU) healthcare worker, along with literature review on control measures prevent an NICU outbreak. In January 2023, our hospital experienced nosocomial SARS-CoV-2 spread among patients and workers. The prevalent strains were BA.5 (79%), BA.2.75 (11.0%), BQ.1 (8.4%) BA.2 (0.8%).1 On 9th 10th, workers tested...