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남궁호(Ho Namgung),정중식(Jung Sik Jeong),최조천(Jo-Cheon Choi),김건웅(Geun Woong Kim),김주성(Joo-sung Kim) 한국지능시스템학회 2019 한국지능시스템학회논문지 Vol.29 No.1
해상에서 자율운항선박을 안전하게 운용하기 위해서는 유인선박과의 충돌회피를 위한 정보교환은 필수적이다. 따라서 충돌회피를 위한 국제규정 및 충돌위험도 평가를 기반 한 통신시스템을 활용하여 유인선박과의 항해의도를 교환하는 것은 중요하다. 본 연구에서는 자율운항선박과 유인선박 간의 조우상황에서 충돌회피를 위한 효율적인 정보교환을 위한 절차를 제시하고, 충돌위험도 평가를 위해 퍼지추론시스템을 사용한다. 충돌위험도가 지정 된 임계값을 초과하는 경우, 자율운항선박에서 유인선박에게 항해의도를 전달한다. In order to safely operate the autonomous ship at sea, it is necessary to communicate with manned ships for collision avoidance. In the encountering situations, it is important to exchange navigation intention to manned ship through the communication system on basis of self-evaluated collision risk and international regulations for collision avoidance. This research illustrates an efficient procedure for safe navigation of autonomous ship. The conventional fuzzy inference system was used to assess collision risk. In case that collision risk exceeds the pre-designated threshold, the navigation intention is transmitted from the autonomous ship to manned ship.
니트로벤젠용액내에서의 브롬화갈륨과 i-브롬화부틸과의 착물형성에 관한 연구
권오천,남궁진희,최기준,Gwon, O Cheon,NamGung, Jin Hui,Choe, Gi Jun 대한화학회 1994 대한화학회지 Vol.38 No.3
니트로벤젠용액내에서의 i-브롬화브텔의 용해도를 19, 25, 40$^{\circ}C$에서 브롬화갈륨이 있을 때와 없을때에 각각 측정하여 보았다. 브롬화갈륨이 존재할 때에는 용액내에서 i-브롬화부틸과 브롬화갈륨의 1:1착물,$ i-C_4H9Br{\cdot}GaBr_3$가 형성된다. 이 착물형성의 instability constant K는 다음 식으로 계산된다. $i-C_4H9_Br{\cdot}GaBr_3{\rightleftharpoons}C_4H_9Br + 1/2Ga_2Br_6.$ 따라서 브로화갈륨과 각 브롬화알킬간의 착물형성의 안정도를 비교검토한 결과 이들 브롬화알킬의 carbonium ion의 안정도와 직접적인 관계가 있다고 본다. The solubility of i-butyl bromide in nitrobenzene have been measured at 19, 25 and $40^{\circ}C$ in the presence and absence of gallium bromide. In the presence of gallium bromide, 1 : 1 complex, $i-C_4H_9Br{\cdot}GaBr_3$ is formed in the solution. The instability constant K of the complex formation was evaluated from the following equilibrium equation. $i-C_4H_9Br{\cdot}GaBr_3{\rightleftharpoons}C_4H_9Br + 1/2Ga_2Br_6.$ From these result, it seems that the stabilities of the complex formation, gallium bromide with alkyl bromide, are directly related with those of the carbonium ions of alkyl bromide.
Isolated Diaphragmatic Metastasis Originated from Adenocarcinoma of the Colon
Kang Hong Lee,Chang Sik Yu,Hwan Namgung,Hee Cheol Kim,Jin Cheon Kim 대한암학회 2004 Cancer Research and Treatment Vol.36 No.2
Isolated diaphragmatic metastasis arising from colorectal cancer has been reported only one case in the literature presently. Here, we presented a new case and discussed the possible pathogenesis and the treatment options. A 42-year-old male patient had received anterior resection for sigmoid colon cancer. Although the increased serum CEA level was detected 20 months after the surgery, metastatic lesion could not be detected by repeated colonoscopy, CT scan, bone scan or PET scan for 35 months. We could detect a suspicious metastatic lesion on the liver by CT scan at 56 month after the surgery. During a second-look operation, we found a solitary metastasis on the diaphragm and removed it along with the 1 cm tumor-free resection margin. Although the prognosis associated with skeletal metastasis is poor, the complete resection of isolated diaphragmatic metastasis and subsequent appropriate adjuvant chemotherapy may achieve a cure the disease provided that other metastatic lesions are absent.