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1,012 results on '"Kim, S. I."'

5. Mechanisms of weak thickness dependence of the critical current density in strong pinning ex situ metal-organic-deposition route YBa2Cu3O7-x coated conductors

Author

Kim, S. I., Gurevich, A., Song, X., Li, X., Zhang, W., Kodenkandath, T., Rupich, M. W., Holesinger, T. G., and Larbalestier, D. C.

Subjects
Condensed Matter - Superconductivity
Abstract

We report on the thickness dependence of the superconducting characteristics including critical current Ic, critical current density Jc, transition temperature Tc, irreversibility field Hirr, bulk pinning force plot Fp(H), and the normal state resistivity curve measured after successive ion milling of ~ 1 um thick high Ic YBa2Cu3O7-x films made by an ex situ metal-organic deposition process on Ni-W rolling-assisted biaxially textured substrates (RABiTS). Contrary to many recent data, mostly on in situ pulsed laser deposition (PLD) films, which show strong depression of Jc with increasing film thickness t, our films exhibit only a weak dependence of Jc on t. The two better textured samples had full cross-section average Jc,avg(77K,0T) ~ 4 MA/cm2 near the buffer layer interface and ~3 MA/cm2 at full thickness, despite significant current blocking due to ~30% porosity in the film. Taking account of the thickness dependence of the porosity, we estimate that the local, vortex-pinning current density is essentially independent of thickness, while accounting for the additional current-blocking effects of grain boundaries leads to local, vortex-pinning Jc values well above 5 MA/cm2. Such high local Jc values are produced by strong three-dimensional vortex pinning which subdivides vortex lines into weakly coupled segments much shorter than the film thickness., Comment: Submitted to Superconductor Science and Technology

Published
2006
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27. The Effect of Industry Homogeneity on the Magnitude of Post-Earnings Announcement Drift: Evidence from Korea

Author

S Park, Hyejeong Shin, and Kim S.-I.

Subjects
Information transfer, Spillover effect, Stock exchange, Accounting, Homogeneity (statistics), Econometrics, Economics, Capital market, Finance, Operating cost, Knowledge spillover, Post-earnings-announcement drift
Abstract

We examine the relationship between industry homogeneity and the magnitude of post-earnings announcement drift (hereafter, PEAD). Given that firms with more homogeneous operating cost structure are conducive to spillover of knowledge among investors, we expect that firms in highly homogenous industries have relatively low magnitude of PEAD. Using firms listed on the Korean Stock Exchange, we find that the magnitude of PEAD is negatively related to industry homogeneity, indicating that investors are more efficient for firms in a highly homogenous industry in which information is likely to be referred to peer firms. In addition, we find that the effect of industry homogeneity on the magnitude of PEAD is robust even after controlling to the effect of industry concentration. Our study contributes to the literature on exploring determinants of PEAD by linking information transfer effect in a homogenous industry to investorsA­ informational efficiency in capital markets.

Published
2019

45. Immunogenicity and Safety of the Adjuvanted Recombinant Zoster Vaccine in Chronically Immunosuppressed Adults Following Renal Transplant: A Phase 3, Randomized Clinical Trial

Author

Vink, P., Ramon Torrell J. M., Sanchez Fructuoso A., Kim S. -J., Kim S. -I., Zaltzman J., Ortiz F., Campistol Plana J. M., Fernandez Rodriguez A. M., Rebollo Rodrigo H., Campins Marti M., Perez R., Gonzalez Roncero F. M., Kumar D., Chiang Y. -J., Doucette K., Pipeleers L., Aguera Morales M. L., Rodriguez-Ferrero M. L., Secchi A., McNeil S. A., Campora L., Di Paolo E., El Idrissi M., Lopez-Fauqued M., Salaun B., Heineman T. C., Oostvogels L., Caldara, Rossana, Carmellini, Mario, Chen, Yen-Ta, Garibotto, Giacomo, González Montes Esther, Kanaan, Nada, Kuypers, Dirk, Lin, Cheng-Chia, Maggiore, Umberto, Navratil, Pavel, Van der Tol Arjan, Villate Navarro José Ignacio, Virgilio, Bice, and and Wu, Ming-Ju.

Subjects
safety, immunosuppression, herpes zoster vaccine, immunogenicity, renal transplant
Published
2020

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