It is feasible and safe to perform PD using the Da Vinci robot-assisted surgical system; patients recovered faster postoperatively with less blood loss during surgery.

We fabricated (Ba,K)Fe 2 As 2 superconducting wires and tapes using the powder-in-tube method and hot isostatic pressing (HIP). HIP wires and tapes showed a high value of transport critical current density (J c ) exceeding 100 kAcm −2 at T=4.2 K and the self-field. Transport J c in the HIP wire reached 38 kAcm −2 in a high magnetic field of 100 kOe. This value is almost twice larger than the previous highest value of J c among round wires using iron-based superconductors. Enhancement of J c in the wires and tapes was caused by improvement of the drawing process, which caused degradation of the core, formation of microcracks, weak links between grains, and random orientation of grains. Details of the effect of the improved fabrication processes on the J c are discussed. Keywords: superconducting wires and tapes, (Ba,K)Fe 2 As 2 , critical current density, powder-intube (PIT), hot isostatic pressing (HIP)

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Abstract. In this paper, we systematically study the electron doping effect in a new BiS 2 -based system Sr 1−x La x FBiS 2 (0 ≤ x ≤ 0.7) through multiple techniques of X-ray diffraction, electrical transport, magnetic susceptibility, and Hall effect measurements. The parent compound SrFBiS 2 is found to possess a semiconducting-like ground state, with thermally activation energy E g ∼ 38 meV. By the partial substitution of La for Sr, superconductivity emerges when x > 0.3, reaching its maximal superconducting transition temperature T c ∼ 3.5 K at x = 0.55. In the normal state of superconducting samples, it is clearly seen that there exists a crossover from metallic to semiconducting state below a temperature T min , which shifts to lower temperatures with increasing La content. Based on these measurements, the associated electronic phase diagram of Sr 1−x La x FBiS 2 system has thus been established.