다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

2017 ESC Guidelines on the Diagnosis and Treatment of Peripheral Arterial Diseases, in collaboration with the European Society for Vascular Surgery (ESVS) : Document covering atherosclerotic disease of extracranial carotid and vertebral, mesenteric, renal, upper and lower extremity arteries

/pdf/2017-esc-guidelines-on-the-diagnosis-and-treatment-of-2vt5ciu2yn.pdf

When asked to explain the importance of the discovery of conducting polymers, I offer two basic answers: first they did not (could not?) exist, and second, that they offer a unique combination of properties not available from any other known materials. The first expresses an intellectual challenge; the second expresses a promise for utility in a wide variety of applications.

Semiconducting and Metallic Polymers: The Fourth Generation of Polymeric Materials (Nobel Lecture).

2020 ACC/AHA Guideline for the Management of Patients With Valvular Heart Disease: A Report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines

We fabricated bulk Y-Ba-Cu-O superconductors with artificial holes that were created by oxidizing carbon rods embedded in the precursor pellets. Twenty carbon rods 500 μm in diameter and 5 mm in length were compacted with bulk Y-Ba-Cu-O precursor pellets such that carbon rods were parallel to the thickness direction. Then the precursors were heated at 1000 °C and 1050 °C. During the heating process, carbon rods reacted with ambient oxygen and twenty holes were successfully produced. With oxygen annealing treatment, the bulk Y-Ba-Cu-O superconductors with 20 holes exhibited superconductivity. Microstructural observations showed that the grain size around carbon rods was larger than that of the interior region. This was probably due to the fact that the temperature near the carbon rod was raised since the reaction of carbon and oxygen is exothermic. We also noticed that the formation of pores was largely inhibited near the holes.

https://iopscience.iop.org/article/10.1088/1742-6596/234/1/012037/pdf

Fabrication of bulk Y-Ba-Cu-O superconductors with artificial holes through oxidation of carbon rods

Abstract 1832: Location of Making Type 1 Electrocardiogram in Brugada Syndrome: Comparison between Lead Position and Anatomical Location of Right Ventricular Outflow Tract

Improvement in Superconducting Properties of Air Processed SmBa2Cu3Oy with Ag2O Addition

Critical currents in superconductors

We studied microstructure and superconducting properties of melt-processed RE123 (RE = Y and Dy) bulk superconductors with a large amount of BaCeO3 addition. The melttextured bulk samples with compositions of Y123 + xBaCeO3 (x = 0.05-0.4) and 0.5 wt% of Pt were fabricated in air. The BaCeO3 particles with the diameter of 1-2 µm were trapped in the melt-textured samples. The critical current density (Jc) in a low field region increased with the amount of BaCeO3 inclusions. This suggests the BaCeO3 particles act as effective flux pinning centers, as well as Y211 particles in conventional melt-textured Y-Ba-Cu-O bulk materials. We found that the size of BaCeO3 particles could be reduced by substituting Zr on Ce site. The Y123 bulk sample with 30 mol% of Ba(Ce0.75Zr0.25)O3 and 0.5 wt% Pt showed a high Jc value of 110 kA/cm2 at 77 K. The Dy123 bulk samples dispersed BaCeO3 and Ba(Ce0.75Zr0.25)O3 particles also exhibited excellent Jc-B properties.

Masato Murakami

Papers

Fabrication of bulk Y-Ba-Cu-O superconductors with artificial holes through oxidation of carbon rods

Abstract 1832: Location of Making Type 1 Electrocardiogram in Brugada Syndrome: Comparison between Lead Position and Anatomical Location of Right Ventricular Outflow Tract

Improvement in Superconducting Properties of Air Processed SmBa2Cu3Oy with Ag2O Addition

Critical currents in superconductors

Microstructure and superconducting properties of meltprocessed RE-Ba-Cu-O with dispersed barium cerate particles