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404 results on '"Oh, Min-seok"'

4. Investigation of Residue Dissipation of Fluxapyroxad and Its Metabolites in Chinese Cabbage and Spring Scallion Using Different Application Methods.

Author

Lee, Ji Won, Kim, Jin-Seong, Park, Ji Hyun, Noh, Hyun Ho, Oh, Min Seok, Kim, Jin-Hyo, and Son, Kyeong-Ae

Subjects
CROP growth, FUNGICIDES, CROPS, DILUTION, METABOLITES
Abstract

Fluxapyroxad, a persistent fungicide in soil, was investigated for differences in residue dissipation in Chinese cabbage and spring scallion through the application methods of soil, foliar, and systemic treatment. Soil application of 0.4% granule fluxapyroxad resulted in residues up to 0.09 mg kg−1 in the scallion, while it did not contribute to the residues in the harvested cabbage. The 50% dissipation time (DT50) of fluxapyroxad in the scallion was 6.8 days. The residues from systemic treatment were highly correlated with foliar application in both the cabbage and the scallion, and the initial residue and DT50 values were similar for foliar and systemic treatments. In comparing the residues from the systemic treatments between the two crops, the initial residue was 3.11 and 0.22 mg kg−1 in the cabbage and the scallion after the systemic treatment, respectively. The DT50 values were 2.6 and 12.2 days in the cabbage and the scallion, respectively. The theoretical dilution effect due to crop growth was higher for the cabbage (4-fold) than for the scallion (1.2-fold), and the half-lives of fluxapyroxad without considering the dilution effect were 6.4 days in the cabbage and 17.8 days in the scallion. Thus, the residue difference was drastically reduced after 14 days from the last treatment. [ABSTRACT FROM AUTHOR]

Published
2024
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24. Low complexity bit-level soft-decision decoding for Reed-Solomon codes

Author

Oh, Min-seok

Subjects
621.3822, Error-correction, Communication, Storage systems
Abstract

Reed-Solomon codes (RS codes) are an important method for achieving error-correction in communication and storage systems. However, it has proved difficult to find a soft-decision decoding method which has low complexity. Moreover, in some previous soft-decision decoding approaches, bit-level soft-decision information could not be employed fully. Even though RS codes have powerful error correction capability, this is a critical shortcoming. This thesis presents bit-level soft-decision decoding schemes for RS codes. The aim is to design a low complexity sequential decoding method based on bit-level soft- decision information approaching maximum likelihood performance. Firstly a trellis decoding scheme which gives easy implementation is introduced, since the soft-decision information can be used directly. In order to allow bit-level soft-decision, a binary equivalent code is introduced and Wolf's method is used to construct the binary-trellis from a systematic parity check matrix. Secondly, the Fano sequential decoding method is chosen, which is sub-optimal and adaptable to channel conditions. This method does not need a large amount of storage to perform an efficient trellis search. The Fano algorithm is then modified to improve the error correcting performance. Finally, further methods of complexity reduction are presented without loss of decoding performance, based on reliability-first search decoding using permutation groups for RS codes. Compared with the decoder without permutation, those schemes give a large complexity reduction and performance improvement approaching near maximum likelihood performance. In this thesis, three types of permutation, cyclic, squaring and hybrid permutation, are presented and the decoding methods using them are implemented.

Published
1999

31. Amyloid Against Amyloid: Dimeric Amyloid Fragment Ameliorates Cognitive Impairments by Direct Clearance of Oligomers and Plaques

Author

Lee, Hee Yang, primary, Baek, Seungyeop, additional, Cha, Minhae, additional, Yang, Seung‐Hoon, additional, Cho, Illhwan, additional, Shin, Heewon, additional, Lee, Sejin, additional, Kim, Hye Yun, additional, Lee, Songmin, additional, Shin, Jisu, additional, Lee, Donghee, additional, Kim, Kyeonghwan, additional, Park, InWook, additional, Yoon, Soljee, additional, Kim, Jiyoon, additional, Park, Seong Jeong, additional, Kim, Seong Muk, additional, Kim, Ko Eun, additional, Kim, Hye Ju, additional, Oh, Min‐Seok, additional, Lee, Gwan‐Ho, additional, Yu, Byung‐Yong, additional, Kannan, Priyadharshini, additional, Park, Keunwan, additional, and Kim, YoungSoo, additional

Published
2023
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