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신현식,정근회 麗水水産大學校産業技術硏究所 1997 産業基術硏究所 論文集 Vol.6 No.-
In this study, we define the appropriate classification of information and telecommunication industry, including telecommunications equipment and service industry in order to provide the concerned governmental institutions with data useful for establishing industry promoting policy. And on the basis of this classification, we analyse traits and structure of the recent market, and also perform trends-analysis and market-forecast using data which have been fielded in our DB system since 1984. First, we classify telecommunications industries into telecommunications equipment industry, information equipment industry, S/W industry, telecommunications component manufacturing industry, and telecommunications service industry. And then, we classify telecommunications equipment industry and telecommunications service industry into more details; respectively, wire communication equipment / wireless communication equipment, computer equipment / peripheral equipment, system software / application software, active component / passive component / service / other telecommunications service industry. The characteristics of the recent industry are as follows; 1. in the economic-industrial aspect, role enlargement of information and telecommunications industry. 2. in the aspect of technology environment, rapid development of technology and technology commercialization. 3. in the market structure aspect, expansion of Regionalism.
다중 심벌 검파를 이용한 트렐리스 부호화된 대역 확산 통신 시스템
鄭瑾會,金宗一 관동대학교 1998 關大論文集 Vol.26 No.2
In this paper, we propose the wideband trellis-coded spread spectrum communication system with the multiple symbol detection in the high speed mobile communications. In 1982, the trellis-coded modulation(TCM) method was developed by Ungerboeck for power and bandwidth efficient digital communication. In order to apply the MDPSK to TCM, we will perform signal set expantion and set partition by the phase difference. We investigate the performance of the uncoded MDPSK and the trellis-coded spread spectrum communication system with the multiple symbol detection in the AWGN and the mobile channel. In this system, we can improve the coding gain in the digital communications.
이동 위성통신 채널에서 인터리빙을 이용한 트렐리스 부호화된 MDRSK의 다중 심벌 검파
鄭瑾會,金宗一 관동대학교 1997 關大論文集 Vol.25 No.2
In order to improve the performance of the trellis-coded MDPSK, this paper proposes the Viterbi decoder that have the squared Euclidean distance of Lth order phase difference as well as 1st order phase difference as the branch metrics by using the multiple symbol detection method. In the satellite communication, the random error by an additive white Gaussian noise(AWGN) and the burst error by fadding take place. The conventional trellis-coded modulation system is suitable for AWGN, but it has the fault that the performance decreases in satellite communication channel. For the purpose of complementing these fault, the interleaving technique is used in this paper. Furthermore, we also improve in performance by applying TCM, with the multiple symbol detection, for the satellite communication channel which power and bandwidth are limited.
2-Mercaptobenzoxazole 및 2-Mercaptobenzimidazole의 새로운 합성법
정근회(Kun Hoe Chung),이동국(Dong Guk Lee),고영관(Young Kwan Ko),류재욱(Jae Wook Ryu),우재춘(Jae Chun Woo),구동완(Dong Wan Koo),김대황(Dae-Whang Kim) 한국농약과학회 2006 농약과학회지 Vol.10 No.1
New synthetic method of 2-mercaptobenzoxazoles and 2-mercaptobenzimidazoles was established using elemental sulfur, dichloromethane, inorganic base and catalysts in alcohol solvents. This reaction condition gave products in high yields.
김진주,김시용,김영권,정근회,김태준 한국응용곤충학회 2008 한국응용곤충학회 학술대회논문집 Vol.2008 No.05
본 연구는 신규 살비제 개발을 목적으로 생물활성 검정을 통하여 신규 화합물 K-16776의 활성을 증가시킬 수 있는 보조제(Adjuvants)를 선발하고자 수행하였다. 시험에 사용된 보조제는 모두 16종 이었으며, 보조제 250ppm이 점박이응애(Tetranychus urticae)에 미치는 영향과 K-16776에 보조제를 첨가하였을 때의 살비활성의 증가효과를 조사하였다. 실내 시험 결과 보조제만 처리하였을 경우 보조제 QTO (Methyl(polypropylene polyethylene glycol) bis(trimethylsiloxy)silane)외 6종의 보조제가 6.6~26.4%의 살비활성을 보였으며, 나머지 보조제들은 점박이응애 암컷성충에 대하여 활성을 보이지 않았다. 신규화합물 K-16776 원제의 경우 63.4%의 살비활성을 보였으나, 보조제 A, B, C를 첨가하였을 경우 살충활성이 97.5, 100, 100%로 증가되었다. 선발된 3종의 보조제를 첨가하여 점박이응애의 모든 발육단계가 혼재된 온실조건에서 살비활성을 검토한 결과, 처리 12일 후에 살비활성이 각각 20.6, 21.3, 25.9% 증가하였다. 이상의 결과는 적절한 보조제의 선발에 의한 K-16776의 활성 증가의 가능성을 제시하고 있으며, 신규 살비제 개발을 위한 실내시험에 기초 자료로 활용될 수 있을 것이다.
NADH - ubiquinone oxidoreductase 저해제인 quinoline 유도체들의 생리활성
조광연,정근회,다까하시노부다까,요시다시게오 한국농화학회 1991 Applied Biological Chemistry (Appl Biol Chem) Vol.34 No.1
New quinoline compounds were designed, synthesized, and examined with sub mitochondria. Most compounds showed high activity against NADH-ubiquinone oxidoreductase. Inhibition activity was mainly affected by the length of the lipophilic part, regardless of bulkiness or to ration of a phenyl group in the side chain. The β-methyl group was demonstrated to be the optimal functionality on tire nuclei of the quinoline derivatives so that either deletion or insertion of a methyiene on the group eliminated its activity(Received January 25, 1991, Accepted Mach 25, 1991).