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그래프 모형을 이용한 지수분포 모수들의 기하평균 비교에 관한 연구
김대황,김혜중,Kim, Dae-Hwang,Kim, Hea-Jung 한국통계학회 2006 응용통계연구 Vol.19 No.3
본 연구에서는 확률모형의 모수로부터 얻어지는 여러 형태의 함수간의 크기를 다중 비교 하는 방법을 제안하고자 한다. 이 방법은 비교대상인 모수 함수 간의 선호확률을 베이지안 방법으로 추정하고, 이들로부터 얻어지는 선호행렬을 이용한 새로운 다중비교법이다. 이러한 방법의 제안에 필요한 이론과 비교기준을 고안하였으며, 응용 예로 제안된 방법을 s의 독립인 지수분포 모수의 기하평균 크기 비교에 적용하였다. This paper develops a multiple comparison method for finding an optimal ordering of K geometric means of exponential parameters. This is based on the paired comparison experimental arrangement whose results can naturally be represented by a completely oriented graph. Introducing posterior preference probabilities and stochastic transitivity conditions to the graph, we obtain a new graphical model that yields criteria for the optimal ordering in the multiple comparison. Necessary theories involved in the method and some computational aspects are provided. Some numerical examples are given to illustrate the efficiency of the suggested method.
홍성만(Sung Man Hong),김대황(Dae Hwang Kim),이환효(Hwan Hyo Lee),공효(Hyo Gong),우제홍(Ze Hong Woo) 대한소화기학회 1994 대한소화기학회지 Vol.26 No.6
N/A We analysed 48 patients with intraabdominal tuberculosis and treated at the Department of General Surgery, National Medical Center, from January 1985 to December. We evaluated the efficiency of diagnostic modalities for intraabdominal tuberculosis and provided the guideline for therapeutic trials. The ratio of male to female was 1: 1.1. The peak inciodence were the second(27.1%) and third decades(22.9%). The frequent symptoms were abdominal pain (75%), nausea and vom- iting(33.3%), and abdominal mass(25.0%). The duration of symptom was within 1 month (77.1%) mostly. Twenty two cases (45.8%) were associated with pulmonary tuberculosis,' other 3 cases extrapulmonary tuberculosis. In the AFB smears of ascites, 2 cases(13.3%) showed positive reaction. The correct preoperative diagnosis was possible in 23 cases(64.9% ). Thirty six cases(75.0%) needed operation '. 20 cases(55.5%) received emergency operation and the other elective operations. The major operative procedures were right hemicolectomy (22.8%) and segmental rescetion of small bowels(22.8%). The frequent operative findings were tuberculous mesenteric lymphadenopathy(52.8%), adhesion(38.9%), intestinal perfora- tion(25.0%), ascites(22.2%). The postoperative complications including wound infections, pneumonia and enterocutaneous fistula were occurred in 11 cases(31.6%). Other 12 cases were not operated and took antituberculous medications, and improved symptomatically. We suggests that intraabdominal tuberculosis should be differentiated from various surgical abdo- men with vague symptoms or signs, especially in young patient. We recommend antituberculous medications in suspicious case. In complicated cases, emergency operations such as intestinal resection or enterostomy should be performed.(Korean J Gastroenterol 1994; 26: 1021-1028)
이종남(Jong-Nam Lee),구석진(Suk-Jin Koo),김도순(Do-Soon Kim),황기환(Ki-Hwan Hwang),김대황(Dae-Hwang Kim),고영관(Yong-Kwan Ko),정근회(Keun-Hoe Chung),류재욱(Jae-Wook Ryu),우재춘(Jae-Chun Woo),구동완(Dong-Wan Koo) 한국농약과학회 2006 농약과학회지 Vol.10 No.4
This study was conducted to evaluate herbicidal properties of picolinafen in terms of crop safety, weed control spectrum, application window, residual efficacy and resistant weed control. Herbicidal phytotoxicity of picolinafen to wheat and barley was greatest when applied at 0 days after sowing (DAS), but decreased significantly as plant growth advanced. Picolinafen showed greater activity against broadleaved weeds than grass weeds. Picolinafen showed highest activity when it was applied at early post?emergence timing (5 to 15 DAS), and showed significantly decreased activity at 20 DAS application. The LT?? values (the period from application required for residual control by 50%) was 9.3 and 6.5 days against Digitaria ciliaris and Brasica naus at 60 g a.i. ha?¹, respectively. Picolinafen showed similar activities against both triazine?resistant and sensitive Amaranthus retroflexus. Collectively, picolinafen appeared to have a good fitness to control resistant broad?leaved weeds control by early post?emergence application.
Young Kwan Ko(고영관),Hae Sung Chang(장해성),Jae Wook Ryu(류재욱),Jae Chun Woo(우재춘),Dong Wan Koo(구동완),Kun Hoe Chung(정근회),In Taek Hwang(황인택),Dae-Whang Kim(김대황) 한국농약과학회 2002 농약과학회지 Vol.6 No.1
New benzenesulfonylurea derivatives possessing bicyclic ketal subgroup were synthesized and shown to have interesting herbicidal activities under upland greenhouse screening.
New benzenesulfonylurea derivatives possessing β-hydroxyalkyl subgroup
Young Kwan Ko(고영관),Hae Sung Chang(장해성),Jae Wook Ryu(류재욱),Jae Chun Woo(우재춘),Dong Wan Koo(구동완),In Taek Hwang(황인택),Dae-Whang Kim(김대황) 한국농약과학회 2001 농약과학회지 Vol.5 No.3
New benzenesulfonylurea derivatives possessing (β-hydroxyalkyl subgroup were synthesized and found to have interesting herbicidal activity in greenhouse screening.