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아미노아조벤젠계 분산염료의 치환기가 염색성에 미치는 영향에 관한 연구
김성동,곽태수,Kim, Seong-Dong,Gwak, Tae-Su 한국섬유공학회 1997 한국섬유공학회지 Vol.34 No.11
Six aminoazobenzene disperse dyes derived from different N,N-dialkylanilines and 2-chloro-4-nitroaniline, were synthesized and their chemical structure were analyzed by 500 MHz NMR spectroscopy. The wavelength of maximum absorption of the synthesized dyes, which was dependent on the electron donating ability of the substituent, was in the range of 517.5~531.0 nm. As terminal alkyl group had more carbon, the dyeing rate of disperse dye decreased, the exhaustion rate became lower, and wash fastness of the dyed fabric improved. These results were discussed in terms of the molecular volume of the dispose dye and dye-fiber interaction such as van der Waals force.
방사선 치료 유무 및 수술 범위에 따른 후두전절제술 후 인두피부누공 발생률 분석
김성동(Seong dong Kim),이여진(Yeo-jeen Yi),김민수(Min-soo Kim),정우진(Woo-Jin Jeong),안순현(Soon-Hyun Ahn) 대한두경부종양학회 2014 대한두경부 종양학회지 Vol.30 No.2
Background and Objectives:Pharyngocutaneous fistula is the most common complication after total laryn-gectomy. The objective of this study was to determine the incidence of pharyngocutaneous fistula after total laryn-gectomy in patients operated on in our department and to establish whether specific factors predispose to fistula formation. Materials and Methods:For 10 years(2003-2014), 49 cases of patients who were diagnosed with la-ryngeal cancer and underwent total laryngectomy in our department. Patients who underwent radiotherapy before the surgery was 24 cases(48.9%) of all total laryngectomy patients. And those who were needed flap reconstruc-tion because of extensive tumor involvement to hypopharynx were also 24 cases(48.9%), whereas primary closure were performed in 25 cases(51%). Results:The postoperative pharyngocutaneous fistula was found in 12 of the 49 patients(24.5%). The radiotherapy before surgery was a statistically significant factor that increase the inci-dence of postoperative fistulas(p=0.037). Large extent of surgery including flap reconstruction was almost statisti-cally significant factor of raising postoperative fistula rates(p=0.051). Conclusion:According to this study, the pres-ence of postoperative fistula seems to be influenced by previous radiotherapy and the extent of surgery. These could be the risk factors of pharyngocutaneous fistula after total laryngectomy.
ATM 스위치를 위한 다단 로테이터 그래프 네트워크의 성능 분석
김성동(Seong-Dong Kim) 한국정보과학회 1998 정보과학회논문지 : 시스템 및 이론 Vol.25 No.12
본 논문은 간접 로테이터 그래프 네트워크(IRGN)[l]를 기초로 한 다단 인터커넥션 네트워크를 ATM 스위치 패브릭으로 고려한다. IRGN은 충돌이 없는 라우팅이 아니기 때문에 ATM 스위치 패브릭으로 바로 사용할 수가 없다. 충돌로 인한 거부된 패킷을 잃는다는 가정은 실용적이지 못하다. 패킷 충돌 문제를 해결하기 위하여 본 논문에서는 개방루프 IRGN과 폐루프 IRGN을 기초로 한 ATM 스위치 패브릭을 제안한다. 이들은 내부 블록킹을 해결하고 내부 스피드를 높이기 위하여 출력 큐잉에 기초한 다단 자기 라우팅 구조를 가진다. 이들 네트워크의 성능 결과는 억셉턴스 확률, 셀 손실 확률, 평균지연, 그리고 최악 경우 지연을 이용한 시뮬레이션을 통하여 평가하였다. This paper considers a multistage interconnection network based on the indirect rotator graph network(IRGN)[l] as an ATM switch fabric. The IRGN cannot be used for an ATM switch fabric directly since this scheme is not conflict-free for routing. The assumption that the rejected packets are lost is not practical. To solve the packet conflict problem, we propose ATM switching architectures based on the open-loop and closed-loop IRGN. These are multistage self-routing structures based on output queuing to resolve internal blocking and to accomplish internal spcedup. The performance results of the networks are evaluated via simulation in terms of acceptance probability, cell loss probability, average delay, and worst case delay.