[en] The electrical conductivity of single crystals of α-Al₂O₃ doped with Cr₂O₃ (0.03-2.5 wt%), NiO (0.75 wt%) plus Cr₂O₃ (0.03-0.15 wt%), and NiO (0.75 wt%) has been measured under 1 MeV electron irradiation at 300 K to investigate the effects of the concentration of impurity and of the depth of impurity levels in forbidden bands on the radiation induced conductivity (RIC). The RIC of Cr₂O₃ and/or NiO doped α-Al₂O₃ decreases with increasing concentration of Cr₂O₃ and/or NiO dopants. The electrical conductivity of 2.5 wt% Cr₂O₃ doped α-Al₂O₃ is smaller than any other doped materials tested. The dose rate exponent for Cr₂O₃ doped α-Al₂O₃ is smaller than that for NiO plus Cr₂O₃ doped material, due to deeper trapping centers of Cr (5.8 eV from the conduction band) than those of Ni (2.0 eV). Doping impurities with deep trapping centers are most effective for suppressing RIC

[en] Hepatic artery aneurysm is a rare and potentially life-threatening entity. We report a case of ruptured common hepatic artery aneurysm in a patient with Behcet s disease. The ruptured aneurysm was treated successfully with transcatheter arterial coil embolization. Transcatheter arterial embolization is the preferred treatment modality in patients at high risk of surgical intervention.

[en] We have investigated the effect of Ta₂O₅ addition on the superconducting properties of REBa₂Cu₃O _y (RE = Er, Sm and Eu: REBCO) prepared by a powder-sintering method. T _c(zero) values showed no degradation up to 1.0 wt.% Ta₂O₅ addition for ErBCO samples. EuBCO and SmBCO samples showed the increase in T _c(zero) from 89 K to 94 K by the addition of 1 wt.% Ta₂O₅, and 80 K to 94 K by the addition of 2 wt.% Ta₂O₅, respectively. J _c values at B = 0.5 T increased by two times the pure samples for ErBCO with 1.0 wt.% addition, four times for EuBCO with 1.5 wt.% addition, and 33 times for SmBCO with 1.0 wt.% addition. The formation of REBa₂TaO₆ was observed for the Ta₂O₅-added REBCO samples