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316 results on '"Park, Hyun S."'

4. Ru2P/Ir2P Heterostructure Promotes Hydrogen Spillover for Efficient Alkaline Hydrogen Evolution Reaction

Author

Hong, Yongju, primary, Jeong, Sangyeon, additional, Seol, Jae Hun, additional, Kim, Taekyung, additional, Cho, Seong Chan, additional, Lee, Tae Kyung, additional, Yang, Chaeyoen, additional, Baik, Hionsuck, additional, Park, Hyun S., additional, Lee, Eunsoo, additional, Yoo, Sung Jong, additional, Lee, Sang Uck, additional, and Lee, Kwangyeol, additional

Published
2024
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27. Quaternary Ammonium‐Free Membranes for Water Electrolysis with 1 m KOH.

Author

Dayan, Asridin, Trisno, Muhammad Luthfi Akbar, Yang, Chaeyeon, Kraglund, Mikkel Rykær, Almind, Mads Radmer, Hjelm, Johan, Jensen, Jens Oluf, Aili, David, Park, Hyun S., and Henkensmeier, Dirk

Subjects
ION-permeable membranes, YOUNG'S modulus, SULFONATION, TENSILE strength
Abstract

While anion exchange membrane (AEM) water electrolysis has many advantages, its commercialization is impeded by the low alkaline stability of most AEM, due to the fragility of quaternary ammonium groups. Ion solvating membranes (ISM) can be an alternative, but so far require high alkaline concentrations. Here, it is shown that sulfonation of polybenzimidazole results in ISM which swell strongly in 1 m KOH. Crosslinking with dibromoxylene controls the swelling, and after activation conductivities of >100 mS cm−1 can be reached in 1 m KOH. Stability in 1 m KOH at 80 °C is excellent: Conductivity remains unchanged and tensile strength and Young's modulus remains high over the test period of a half year. In an electrolyzer operating with 1 m KOH feed solution at 80 °C, a stable performance is achieved for over 500 h test without failure, suggesting that the high alkaline stability observed in ex situ tests is also achieved in the electrolyzer. [ABSTRACT FROM AUTHOR]

Published
2023
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35. Advanced and In Situ Analytical Methods for Solar Fuel Materials

Author

Chan, Candace K., Tüysüz, Harun, Braun, Artur, Ranjan, Chinmoy, La Mantia, Fabio, Miller, Benjamin K., Zhang, Liuxian, Crozier, Peter A., Haber, Joel A., Gregoire, John M., Park, Hyun S., Batchellor, Adam S., Trotochaud, Lena, Boettcher, Shannon W., Bayley, Hagan, Series editor, Houk, Kendall N., Series editor, Hughes, Greg, Series editor, Hunter, Christopher A., Series editor, Ishihara, Kazuaki, Series editor, Krische, Michael J, Series editor, Lehn, J.-M., Series editor, Luque, Rafael, Series editor, Olivucci, Massimo, Series editor, Siegel, Jay S., Series editor, Thiem, Joachim, Series editor, Venturi, Margherita, Series editor, Wong, Chi-Huey, Series editor, Wong, Henry N.C., Series editor, You, Shu-Li, Series editor, Wing-Wah Yam, Vivian, Series editor, Tüysüz, Harun, editor, and Chan, Candace K., editor

Published
2016
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39. Mapping Scrambled Korean Sentences into English Using Synchronous TAGs

Author

Park, Hyun S.

Subjects
Computer Science - Computation and Language
Abstract

Synchronous Tree Adjoining Grammars can be used for Machine Translation. However, translating a free order language such as Korean to English is complicated. I present a mechanism to translate scrambled Korean sentences into English by combining the concepts of Multi-Component TAGs (MC-TAGs) and Synchronous TAGs (STAGs)., Comment: uuencoded compressed ps file. 3 pages. To appear ACL95

Published
1995

40. Korean to English Translation Using Synchronous TAGs

Author

Egedi, Dania, Palmer, Martha, Park, Hyun S., and Joshi, Aravind K.

Subjects
Computer Science - Computation and Language
Abstract

It is often argued that accurate machine translation requires reference to contextual knowledge for the correct treatment of linguistic phenomena such as dropped arguments and accurate lexical selection. One of the historical arguments in favor of the interlingua approach has been that, since it revolves around a deep semantic representation, it is better able to handle the types of linguistic phenomena that are seen as requiring a knowledge-based approach. In this paper we present an alternative approach, exemplified by a prototype system for machine translation of English and Korean which is implemented in Synchronous TAGs. This approach is essentially transfer based, and uses semantic feature unification for accurate lexical selection of polysemous verbs. The same semantic features, when combined with a discourse model which stores previously mentioned entities, can also be used for the recovery of topicalized arguments. In this paper we concentrate on the translation of Korean to English., Comment: ps file. 8 pages

Published
1994

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