• Journal of Microbiology and Biotechnology
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• v.34 no.2
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• pp.296-305
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• 2024

Peach tree gummosis is a botanical anomaly distinguished by the secretion of dark-brown gum from the shoots of peach trees, and Botryosphaeria dothidea has been identified as one of the fungal species responsible for its occurrence. In South Korea, approximately 80% of gummosis cases are linked to infections caused by B. dothidea. In this study, we isolated microbes from the soil surrounding peach trees exhibiting antifungal activity against B. dothidea. Subsequently, we identified several bacterial strains as potential candidates for a biocontrol agent. Among them, Bacillus velezensis KTA01 displayed the most robust antifungal activity and was therefore selected for further analysis. To investigate the antifungal mechanism of B. velezensis KTA01, we performed tests to assess cell wall degradation and siderophore production. Additionally, we conducted reverse transcription-quantitative polymerase chain reaction (RT-qPCR) analysis based on whole-genome sequencing to confirm the presence of genes responsible for the biosynthesis of lipopeptide compounds, a well-known characteristic of Bacillus spp., and to compare gene expression levels. Moreover, we extracted lipopeptide compounds using methanol and subjected them to both antifungal activity testing and high-performance liquid chromatography (HPLC) analysis. The experimental findings presented in this study unequivocally demonstrate the promising potential of B. velezensis KTA01 as a biocontrol agent against B. dothidea KACC45481, the pathogen responsible for causing peach tree gummosis.

• Journal of Broadcast Engineering
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• v.16 no.2
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• pp.190-206
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• 2011

We propose an adaptive combination scheme of intra and inter prediction modes, where uni-directional intra prediction, bi-directional intra prediction, and inter prediction method are adaptively selected in an EMB (extended macro block). For each EMB, after all inter blocks have been encoded and decoded, the reconstructed blocks are used as reference data for bi-directional intra prediction of other blocks. Whereas conventional intra coding scheme does not use the right and below side pixels of the current block as reference data, the proposed method uses those for bi-directional intra prediction mode. In this paper, we propose three advanced techniques; (a) filter design for bi-directional prediction, (b) adaptive coding order scheme which increases the chance to use the bi-directional intra prediction mode, (c) modification of syntax to represent coding order. The information for the coding order is informed to the decoder by using the modified syntax structure without adding any additional flag. The simulation results show that the proposed scheme reduces the BD-Rate by 0.5%, on average, compared to KTA.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.49 no.1
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• pp.58-66
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• 2012

Even after establishment of H.264/AVC standard, the video coding experts group (VCEG) of ITU-T has researched on development of promising coding techniques to increase coding efficiency based on the key technology area (KTA) software. Recently, the joint collaboration team video coding (JCT-VC) which was composed of the VCEG and the motion picture experts group (MPEG) of ISO/IEC is developing a next-generation video standard namely HEVC intended to gain twice efficiency than H.264/AVC. An adaptive interpolation technique, one of various next-generation techniques, reported higher coding efficiency. However, it has high computational complexity and does not deal with various error characteristics for videos. In this paper, we investigate characteristics of interpolation filters and propose an effective fixed interpolation filter bank including diverse properties of error. Experimental results is shown that the proposed method achieved bitrate reduction by 0.7% and 1.3% compared to fixed directional interpolation filter (FDIF) of the KTA and the directional interpolation filter (DIF) of the HEVC test model, respectively.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.71-72
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• 2008

In order to prepare new video coding standard, ITU-T SG16/Q.6 VCEG is gathering high efficiency and low complexity coding tools. In this paper, we introduce the latest KTA codec that includes new coding tools such as AIF, APEC, AQMS, AQP, IBDI, MDDT, MVC, 1/8-pel MC, and RDO-Q. After that, we describe the our prospection and strategy for these future video coding technology.

• Information and Communications Magazine
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• v.3 no.1
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• pp.52-63
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• 1986

This paper discusses the network evolution strategies, worldwide trends in fiber optics systems, fiber hub in KTA access network, positioning the access network for new digital services - DLC(Digital Loop Carrier), CSA(Carrier Serving Area), and fiber optics systems overlay in the existing access network and its evolution toward near term ISDN.

• Proceedings of the KIEE Conference
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• 1987.07b
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• pp.962-964
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• 1987

In this paper a virtual route pacing control mechanism is introduced to the flow control of M-hop virtual route in the packet data network. The results described in this paper show us a comparison of the relationship between the throughput and the time-delay with the variation of the parameter, the normalized applied load. for the fixed window size.

• 정보화사회
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• s.21
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• pp.7-7
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• 1989

• Journal of the Korean Society of Costume
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• v.65 no.6
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• pp.63-78
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• 2015

This study explored culture adaptive attitudes and traditional dress donning practices among Japanese women who immigrated to Korea after marrying Korean men. Quantitative research was conducted on Korean-Japanese multicultural families. Participants were 233 married women who emigrated from Japan to Korea currently living in Seoul and Gyeonggi Province. The data was analyzed using frequency analysis, t-test and correlation analysis. The findings were as follows: First, a positive relationship was found between Hanbok acceptance attitudes(HAA) and Kimono transmission attitudes(KTA). Both HAA and KTA had a positive relationship with ethnic identity. 43.3% of the respondents thought that they belonged both to Korean and Japanese ethnicity, 30.5% to Korean ethnicity, and 26.2% to Japanese ethnicity. Similar tendency (64.8% to bicultural identity, 31.3% to Korean, and 3.9% to Japanese) was found in the ethnic orientation towards their children. Both HAA and KTA had no difference in accordance with nationality, education and income level. Second, 70.4% of women had no experience of wearing Hanbok, and 90.1% had no experience of wearing Kimono. The women mostly wore Hanbok and Kimono for social events and family weddings.

• Korean Architects
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• no.10 s.270
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• pp.44-49
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• 1991

• Magazine of korean Tunnelling and Underground Space Association
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• v.20 no.4
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• pp.87-93
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• 2018