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Performance Analysis of Adaptive Frame Size Control Scheme in Wireless Networks
김응인(Eung In Kim) 大韓電子工學會 2010 電子工學會論文誌 IE (Industry electronics) Vol.47 No.2
본 논문은 무선 데이터 네트워크에 적용 가능한 적응 프레임 길이 제어 방식을 가진 데이터 링크 프로토콜을 제안한다. 무선 데이터망은 수시로 변화는 에러 환경에 놓여 있다. 이런 에러 환경에서도 잘 적용할 수 있는 가변 프레임 제어 방식을 제안하고 그 성능을 분석하였다. 2상태 마코프 모델을 이용하여 채널 환경을 모델링하였다. 수치해석방식을 통하여 새롭게 제안한 방식이 다양한 종류의 에러환경에서도 좋은 성능을 발휘할 수 있음을 보여 주었다. This paper suggests a new data link protocol with an adaptive frame length control scheme for wireless data networks which is subject to errors that occur with time variance. We analyze the proposed scheme under a two-state markov block interference(BI) model. Numerical results show that the proposed scheme can achieve high throughput performance for both dense and diffuse burst noise channels.
남수연(Su Youn Nam),정준표(Jun Pyo Chung),김응(Eung Kim),이종화(Jong Hwa Lee),김기황(Ki Whang Kim),정현주(Hyeon Joo Jeong),정재복(Jae Bock Chung),한지숙(Jee Sook Hahn),강진경(Jin Kyung Kang),박인서(In Suh Park) 대한소화기학회 1994 대한소화기학회지 Vol.26 No.5
Primary pancreatic lyrnphoma is a rare but treatable malignancy that may present as an isolated pancreatic mass. The authors report a case of primary pancreatic lymphoma in a 52- year-old female patient who had a 15-day history of epigastric pain. The CT scan showed a well defined isodense mass, about 5crn in diarneter, in the head of the pancreas and the second portion of duodenum is streched and displaced toward the right side. By percutaneous needle biopsy, histologic diagnosis was made as malignant lymphoma, mixed large and small cells, T cell type according to the Working Formulation. The patient had received combination chemo- therapy with CHOP(cyclophosphaide, doxorubicin, vincristine, predinisone). Epigastric pain and jaundice which was developed during the diagnostic work-up period were improved after one cycle of CHOP. However, the patient died of septic shock on the 56th day after the diag- nosis.(Korean J Gastroenterol 1994; 26: 892 898)