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허용석(Yong Surk Hur),김인익(In Ig Kim),박상배(Sang Bae Park),이균경(Kyun Kyung Lee) 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
Bearing information of target is used critically for target tracking in underwater environment. In passive sonar, target bearing measurements are obtained by processing the acoustic signal emanating from the target. PDA tracking algorithm is usually applied in this case since bearing measurements have several peaks due to interference with other acoustic sources or reflections from underwater media. In this paper, we propose a modified PDA algorithm adopting new probabilistic distributions of the number, position, and amplitude of peaks based on the analysis of real data. This algorithm is tested on real and artificially generated data. The computer simulation result shows improvement of the tracking performance.
허용구(Yong-Gu Hur),권기현(Gi-Hwon Kwon) 한국정보과학회 1997 한국정보과학회 학술발표논문집 Vol.24 No.2Ⅰ
기존의 구문적 순서 가운데 대표적인 순서가 RPO(Recursive Path Ordering)이다. 이 순서는 종료성을 보장할 수 있는 단순화 순서이다. 그렇지만 불행하게도 많은 등식들이 이 RPO를 통해서 개서 규칙으로 변환되지 못한다. 이러한 이유로 Knuth-Bendix 완료 알고리즘 수행 시 생성된 임계 쌍들을 개서 규칙으로 변환하지 못하는 문제가 발생한다. 본 논문에서는 이러한 RPO의 분석을 통한 문제점을 제시하고, 이 문제점을 개선한 새로운 알고리즘을 제시한다.
허용갑(Yong-kap Hur),김나래(Na-rae Kim),윤원경(Won-kyung Yoon),조성기(Sung-kee Jo),정우희(U-hee Jung),박혜란(Hae-ran Park) 한국양봉학회 2007 韓國養蜂學會誌 Vol.22 No.1
Total 18 propolis samples were collected from different regions in Korea and were analyzed for the contents of total flavonoids, active compounds, and anti-bacterial activity. In the analysis of the active compound contents, the total flavonoid and active compound contents varied according to the production regions, but all samples showed high contents of caffeic acid, cinnamic acid, chrysin, flavone, carbohydrate, protein, fat, and minerals. In the analysis of the anti-bacterial activities, all propolis samples showed highest anti-bacterial activity against Bacillus subtilis (KCTC 1022), and also showed relatively high activity against Salmonella typhimurium (KCTC 2515), Candida albicans (KCTC 7965), Staphylococcus aureus (CCARM 201), and Pseudomonas aeruginosa (CCARM 225).
Completion pneumonectomy의 임상적 고찰;11례 임상보고
허용,박재홍,문준호,차경태,안욱수,김병열,이정호,유회성,Hur, Yong,Park, Jae-Hong,Moon, Joon-Ho,Cha, Kyong-Tae,Ahn, Wook-Soo,Kim, Byung-Yul,Lee, Jung-Ho,Yu, Hoe-Sung 대한흉부심장혈관외과학회 1993 Journal of Chest Surgery (J Chest Surg) Vol.26 No.11
Among elevn consecutive cases having undergone Completion Pueumonectomy[CP]between 1958 and Aug. 1993 at the Dep. of Thoracic & Cardiovascular Surgery in National Medical Center. The patient`s mean age was 43 years[range 28 yrs, to 68yrs.],& they consisted with 10 males and 1 female. The indications for CP were benign diseases in 9 cases & 2 cases of lung cancer. The mean interval between the first operation & CP was 62.3 months[from 17 days to 288 months]. The several special intraoperative procedures such as intrapericardial pulmonary vesselsdivision & suture ligation, reinforcement of bronchial stumpmargin, & applied the Fibrin glue & hemostatics. The mean intra operative bleeding was 3582ml.[1500ml. to 6500ml.] The post orerative complication were developed in 5 cases[45.5%] they were empyema with BPF in 2 cases, empyema in 2 cases, & 1 case of repiratoy insufficiency which leading to death. We concluded that the C P noted high morbidity & mortality compared with ordinary first pulmonary resectional surgery. But, it will be a challenge to improved the morbidity because of increasing trend of completion pneumonectomy in a furture time.
허용,김경훈,김철환,박성동,박해홍,문준호,김병열,이정호,Hur, Yong,Kim, Kyung-Hoon,Kim, Chul-Whan,Park, Sung-Dong,Park, Jae-Hong,Moon, Joon-Ho,Kim, Byung-Yul,Lee, Jung-Ho 대한흉부심장혈관외과학회 1994 Journal of Chest Surgery (J Chest Surg) Vol.27 No.12
The spontaneous pneumothorax occurs subsequent to a disruption in the continuity of the visceral pleura with escape of free air into the pleural space included primary & secondary pneumothorax that is unrelated to identifiable etiologies such as trauma. In. the 33 year period 1960 to 1993, the 230 cases of open thoracotomy were carried out for definitive treatment of spontaneous pneumothorax, at the Dept. of Thoracic & Cardiovascular Surgery, National Medical Center, Seoul, Korea. There were 193 men & 37 women. They ranged in age from 15 years old to 72 years old. The lesion site was on the right side in 117 and on the left in 97, the 16 cases were in bilateral lesions.Surgical indications included recurrence in 98 cases, persistent air leak in 68 cases, nonexpansion of the lung 37 cases, roentgenologically apparent bullae & blebs in 23 cases, bilateral lesions in 16 cases,combined hemothorax & prevent for recurrence in each 2 cases. The types of operation were bullectomy in 207 cases, wedge resection in 13 cases, decortication & B.P.F. closure in 6 cases,lobectomy in 2 cases, pneumonectomy, plication in each I case. The post operative complication developed in 18 cases[7.8 %], there was I case of death due to sepsis. We believed that open thoracotomy with resection or obliteration of blebs & pleurodes is provided the best protection against recurrence.