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FST(Fuzzy Search Tree)를 이용한 Fuzzy Query Handling Mechanism
조원봉(Won-Bong Cho),김용훈(Yong-Hoon Kim),조영임(Young-Im Cho),황종선(Jong-Sun Whang) 한국정보과학회 1991 한국정보과학회 학술발표논문집 Vol.18 No.1
정보 처리 시스템에서의 원하는 요구사항에 fuzzy 개념이 포함되어 있을 경우, 기존의 확률론에 근거한 방법으로는 원하는 레코드에 대한 search가 정확하지 못하다. 따라서 본 논문에서는 Fussy Query을 효과적으로 처리할 수 있는 새로운 방법을 제시하였다. 즉 Fussy 개념을 처리함에 있어서 기존의 방법인 확률에 근거하지 않고 가능성 이론에 근거한 Membership 함수를 이용함으로써 원하는 레코드를 보다 정확하게 그리고 빠르게 검색할 수 있다. 본 논문이 제시한 방법은 FST(Fussy Search Tree)를 이용하므로서 기존의 Search 방법보다 Average Search Time면에서 더 우수할 뿐만 아니라 fuzzy query의 미세한 부분(예, 매우, 다소 등)까지도 반영할 수 있으므로 매우 정확한 레코드를 검색할 수 있다. 본 논문이 제시한 방법은 프로그램으로 구현하여 기존의 방법과 비교 분석하였다.
새로운 알고리즘적 Self - Organizing Fuzzy Control 기법에 관한 연구
조영임(Young-Im Cho),황종선(Chong-Sun Hwang),조원봉(Won-Bong Cho) 한국정보과학회 1991 한국정보과학회 학술발표논문집 Vol.18 No.2
퍼지 제어기는 전문가의 지식과 경험을 가지고 지식 베이스를 구축하여 자동제어가 마치 전문가가 제어하는 듯하게 제어할 수 있다. 또한 기존의 자동제어가 linear한 경우에서만 그 제어가 효과적이었지만 퍼지 제어는 nonlinear한 플랜트 제어도 효율적으로 할 수 있다. 이러한 퍼지 제어기에서 가장 optimal한 제어를 하기 위해서는 여러 요인들이 존재할 수 있으나 그 중에서도 멤버쉽 함수의재정의와 range변화가 optimal control을 하기 위한 가장 큰 요인이 되었다. 그래서 본 논문에서는 퍼지 추론과 퍼지 알고리즘을 사용하여 optimal control을 하기 위한 새로운 방법론을 제시하고 그 시뮬레이션 결과를 보였다. 본 논문은 앞으로의 퍼지 adaptive control을 하기 위한 그 기초단계로서 정확하고 보다 효율적인 adaptive control을 하기 위한 framwork이다.
Synthesis and Characterization of N-Methylamidinoglycine : an Isomer of Creatine
조영봉,백운기,Young-Bong Cho,R. John Stedman,Woon Ki Paik Korean Chemical Society 1985 대한화학회지 Vol.29 No.4
N-Methylamidinoglycine, an isomer of creatine which was postulated to be formed enzymatically in vitro, has been synthesized by coupling glycine with N, S-dimethylthiopseudouronium iodide in a yield of approxirnately 60%. On heating in acidic solution, it was converted to a cyclized form (isocreatinine) in analogy with the conversion of creatine to creatinine(anhydrous form). Structures were confirmed by an elemental analysis and proton NMR spectroscopy. Further studies on their characteristics were compared with those of creatine and creatinine in regard to isoelectric points(pI), retardation coefficients(Rf) on thin layer chromatography, and elution profiles on amino acid analyzer. In order to facilitate the comparison, $^{14}C$-labeled creatine, creatinine, isocreatine and isocreatinine were also synthesized. 시험관내에서 효소에 의해 생성될 수 있을 것으로 생각되는 N-Methylamidinoglycine(isocreatine)을 glycine과 N, S-dimethylthiopseudouronium iodide로 부터 약 60% 수득율로 합성하였고, isocreation의 산성수용액을 가열하여, creatine이 creatinine으로 탈수 고리화되는 것처럼, 고리화된 isocreatinine도 얻었다. 한편 이들 화합물에 대해 원소분석, nmr 스펙트럼, 박층 크로마토그피(Rf) 및 아미노산분석기에서의 elution rate도 검토하였으며, 등전점을 측정하기 위해서 $^{14}C$-creatine, $^{14}C$-creatinine, $^{14}C$-isocreatine 및 $^{14}C$-isocreatinine도 합성하였다.
흰쥐에서 N<sup>G</sup>-Monomethyl-L-arginine으로부터 methylamine의 생성
조영봉,안영곤,최홍순,김춘성,Cho, Young Bong,Ahn, Young Kon,Choi, Hong Soon,Kim, Choon Sung 한국산업보건학회 1996 한국산업보건학회지 Vol.6 No.1
After oral administration of 14C-labelled $N^G$-mono[methyl-14C]-L-arginine into rats, 38.2 % and 14.7 % of the administered radioactivity bad been recovered in the urine and stool during 10 days. In the urine, 59.4 % of the radioactivity was recovered in the first 24-hours and used for the indentification of the formation of methylamine. The strong cation-exchange resin column chromatography showed 6.3 %, 7.4 %, 4.9 %, and 81.5 % of the distributions of radioactivity of the neutral, monomethylamine, basic, and uneluted portions, respectively. The radioactivity of monomethylamine portion reeluted into the column chromatography was 39.5 %. The radioactivities corresponding monomethylamine in the column chromatography, thin-layer chromatography, and thin-layer electrophoresis were 39.5 %, 37.3 %, and 28.8 % of the recovered radioactivity, respectively.
소변 중 4-hydroxyproline 분석에 관한 연구
이규원,조영봉,이경종,Lee, Keou-Weon,Cho, Young-Bong,Lee, Kyung-Jong 대한예방의학회 2002 Journal of Preventive Medicine and Public Health Vol.35 No.4
Objectives : The level of 4-hydroxyproline (4-Hyp) in human urine was measured using high performance liquid chromatography (HPLC) with a fluorescence detector. This method is useful for medical examinations and investigating the radicals induced by physical, chemical, mental stresses. This method is superior to many published several methods in terms of its low cost and ability to analyze many samples. Methods : The urine from workers in a tire manufacturing company (22 male pre- and post-shift workers) and 18 office-workers as controls were analyzed. Data concerning age, the cumulative drinking amount and the cumulative smoking amount was collected with a questionnaire. The optimum applied amount of dansyl-Cl, the optimum reaction temperature and time, the recoveries and the optimum pH of the eluent and buffer were determined.4-Hyp from human urine was derivatized with dansyl-Cl (dimethylamino-naphthalene-1-sulfonyl chloride) after removing the a-amino acid by a treatment with phthalic dicarboxaldehyde (OPA) and cleaned with Bond Elut C18 column. The 4-Hyp derivatives were separated on a reversed phase column by gradient elution with a phosphate buffer (5 mmol, pH 8.0) and acetonitrile, and detected by fluorescence measurements at 340 nm (excitation) and 538 nm (emission). Results : The detection limit for the urinary free 4-Hyp was $0.364{\mu}mol/l$. The recovery rate of 4-Hyp was 99.7%, and the effective pH of the phosphate buffer and borate buffer were 3.0 and 8.0, respectively. From statistical analysis, age, drinking and smoking did not affect the urinary free 4-Hyp in both the controls and workers. The range of urinary 4-Hyp in the controls, pre-shift, and post-shift workers were 0.33-16.44, N.D-49.06, and $0.32-56.27{\mu}mol/l$. From the pared-sample t-test, the urinary 4-Hyp levels in post-shift workers ($11.82{\pm}6.73\;nmmol/mg\;Cre$) were 2-fold higher than in pre-shift workers ($5.36{\pm}5.53\;nmol;/mg\;Cre$) and controls ($4.91{\pm}4.89\;nmol;/mg\;Cre$). Conclusions : This method was developed with high sensitivity, accuracy, and precision. The present method was effectively applied to analyze the urinary free 4-Hyp in both controls and workers.
노명현,김효진,박지영,이상열,조영봉,Noh, Myung-Hyun,Kim, Hyo-Jin,Park, Ji-Young,Lee, Sang-Youl,Cho, Young-Bong 한국토지주택공사 토지주택연구원 2012 LHI journal of land, housing, and urban affairs Vol.3 No.2
최근 에너지 관련 연구분야에서 새롭게 주목받는 것이 주변의 에너지를 수확하는 에너지 하비스팅 기술이다. 본 논문에서는 다양한 에너지 하비스팅 기술들 중 압전 기술과 전자기 유도 방식을 조합한 에너지 블록의 발전성능이 조사되었다. 본 연구의 목적은 개발된 에너지 하비스팅 블록의 주택 도시 분야 적용성을 평가하기 위한 것이다. 이를 위해 본 논문에서는 실험실 규모의 다층 에너지 하비스터의 현 발전수준을 평가하여 제시하였다. 그 다음으로 증폭기술이 적용된 프로토타입의 특징을 설명하고 개발된 프로토타입 모듈의 발전성능을 다각적으로 평가하여 제시하였다. 성능 평가 결과, 개발된 에너지 블록은 기존 상용 제품에 비해서 255%와 505%까지 성능이 향상되었고 그 우수성이 입증되었다. 마지막으로 에너지 하비스팅 블록의 후속 연구 방향을 제시하였다. A technology that newly attract attention in the area of energy-related study is the energy harvesting(or scavenging) technology. In this paper, the performance of power generation for the energy harvesting block with a combination of piezoelectric technology and electromagnetic technology among various energy harvesting technologies was investigated. The goal of this study is to evaluate on the applicability of our developed energy harvesting block into the field of urban & housing. First, we evaluated the performance of power generation for the multi-layer energy harvester at laboratory scale. Second, we described the features of our developed prototype module that includes amplification technologies to improve power density per module and evaluated the performance of power generation for the energy harvesting block in a variety of ways. From the test results, the developed product increased the performance of power generation up to 255% or 505% compared to the existing product and its superiority were shown. Finally, we suggested the direction for the improvement of the energy harvesting block module.
매설방법과 차량하중에 따른 벤더형 압전에너지 하베스터의 설계 및 평가
김창일,정영훈,윤지선,조정호,백종후,장용호,최범진,박신서,조영봉,Kim, Chang-Il,Jeong, Young-Hun,Yun, Ji-Sun,Cho, Jeong-Ho,Paik, Jong-Hoo,Jang, Yong-Ho,Choi, Beom-Jin,Park, Shin-Seo,Cho, Young-Bong 한국전기전자재료학회 2016 전기전자재료학회논문지 Vol.29 No.5
A road energy harvester was designed and fabricated to convert mechanical energy from the vehicle load to electrical energy. The road energy harvester is composed of 20 piezoelectric materials. This study attempted to evaluate output depending on pavement materials when paving road piezoelectric energy harvester in the road. Harvester is the bender type and is the method of supporting the both ends of piezoelectric material and applying the load in the middle part. Harvester was paved in the type paved with asphalt, type paved with cement and in the exposed type not covering the top of harvester. The output characteristics were compared and evaluated depending on changes in vehicle load and vehicle speed changes. As vehicles, truck (11.9 ton), SUV(1.6 ton) and sedan (1.5 ton) were used and the output characteristics when driving at the interval of 10 km/h from 10 km/h to 100 km/h were evaluated.