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송일한,김정택 단국대학교 2000 論文集 Vol.35 No.-
Hepatobiliary cystadenoma is a rate but distinct neoplasm with malignant potential, similar to that occuring in the pancreas or ovary. The differential diagnosis of hepatobiliary cystadenoma includes other cystic neoplasms, primary and metastatic, and nonneoplastic cysts including infective conditions. A preoperative distinction from hydatid disease, difficult on radiologic grounds alone, is particulary important. We report a 38-year-old woman admitted because of intermittent epigastric pain. Abdominal ultrasonography, CT and MRI revealed about 15×10㎝ sized multiloculated cystic lesion in medial segment of left lobe of the liver. Hydatid serologic analysis was normal. But serum level of CA 19-9 was raised above 2400U/mL. Under ultrasonographic guidence, we performed aspiration of the cystic fluid. In the examination of cystic fluid, malignant cell was abscent and cystic fluid level of CA 19-9 was also rasied above 2400U/mL. Under the impression of hepatobiliary cystadenoma, laparotomy was performed. A 15×10㎝ sized cystic mass was noted in the medial segment of left lobe of the liver, and then left lobectomy was done. On cut section, 1800mL of serous fluid was obtained from the multiloculated cystic mass. Microscopic findings revealed a cystadenoma lined by a single layer of columnar epithelium containing some intracellular mucin pools and hemorrhagic infact without evidence of cellular atypism or mitosis.
한지훈(Han Ji Hoon),박경배(Park Gyong Bae),곽승욱(Kwak Seung Uk),김정일(Kim Jeong II),정근원(Jeong Keun Won),송인근(Song In Keun),이광배(Lee Kwang Bae),김현욱(Kim Hyen Uk) 한국정보처리학회 1999 정보처리학회논문지 Vol.6 No.1
Uses can share information and use resources effectively by using TCP/IP-based networks. So, a protocol to manage complex networks effectively is needed. For the management of the distributed networks, the SNMP(Simple Network Management Protocol) has been adopted as an international standard in 1989, and the SNMPv2 in which a security function was added was published in 1993. There are two encryption schemes in SNMPv2, the one is a DES using symmetric encryption scheme and the other is a MD5(Message Digest5) hash function for authentication. But the DES has demerits that a key length is a few short and the encryption and the authentication is executed respectively. In order to solve these problems, we use a RSA cryptography in this paper. In this paper, we examine the items related with SNMP. In addition to DES and MD5 proposed in SNMPv3, we enhance security functionality be adopting RSA, a public key algorithm executing the encryption and the authentication simultaneously. The proposed SNMPv3 security module is written in JAVA under Windows NT environment.
권신한,송희섭,이영일 한국콩연구회 1991 韓國콩硏究會誌 Vol.8 No.1
The present study was conducted to evaluate agronomic characters of the soybean germplasm which was collected from the sites covering whole areas of southern Korea peninsula. The total collection of 2,748 native soybean varieties was grouped as the distribution of the several important agronomic characters and the relationships among the traits were investigated. The soybean germplasm was comprised of Kyonggi-do 7.5% (include Seoul), kangwon-do 13.3%, Chungchongbuk-do 6.6%, Chungchongnam-do 12.3%, Chollabuk-do 0.7%, Chollanamdo 12.6%, Kyongsangbuk-do 20.8%, Kyongsangnam-do 15.3%, Cheju-do 0.6% in number of of coHections. Yield was highly positive correlation to the number of pods per plant, but it was negative correlation to maturity, flowering and plant height. Among the germplasm, 70 lines had high yield potential of 2000 kg/ha which was more high yield than the average of the world accounts of 1,915 kg/ha. Germplasm was also classified as green 21.1% and purple 78.9% in stem color, white 21.6% and purple 78.4% in flower color, tawny 61.3% and gray 38.7% in pubescence color. Pod color was tan 37.3%, black 7.8% and brown 54.9%. Hilum color was black 34.2% yellow 14.2%, brown 49% and green 2.6%, Seed coat color was yellow 39.5%, black 21.7%, brown 14.9%, green 14.5% and other color 9.4%.
Topology Optimization of Electrostatic Actuator Using Design Sensitivity
Byun,Jin-Kyu,Park,Ii-han,Hahn,Song-Yop 성균관대학교 2003 학술회의지원논문목록집 Vol.2003 No.-
In this paper, topology optimization approach is used for the design of the electrostatic actuator that can be mamufactured by microelectromechanical system(MEMS)technology. The design goal is to obtain constant maximum torque by properly distibuting dielectric material in the design space of rotor. The objective function is defined for the difference of the system energy to be maximized with respect to the rotation of the rotor. The detailed design with unique shape of rotor pole is achieved. Also, the effect of mesh size and initial conditions on final rotor shape is discussed.
( Ha Yan Kang ),( Won Kyung Lee ),( Yong Hyun Kim ),( Byung Woon Kwon ),( Myung Soo Kang ),( Suk Bae Kim ),( Ii Han Song ) 대한간학회 2011 Clinical and Molecular Hepatology(대한간학회지) Vol.17 No.2
Duodenal varices result from retroperitoneal portosystemic shunts that usually come from the pancreaticoduodenal vein and drain into the inferior vena cava. Because they are a rare but fatal cause of gastrointestinal bleeding, a prompt hemostatic intervention is mandatory. A 62-year-old man who had a history of excessive alcohol consumption presented with massive hematemesis and melena. Emergent endoscopy revealed ruptured varices with an adhering whitish fibrin clot on the postbulbar portion of the duodenum. Abdominal computed tomography demonstrated a cirrhotic liver with venous collaterals around the duodenum and extravasated contrast in the second and third portions. The collaterals originated from the main portal vein and drained via the right renal vein into the inferior vena cava. Endoscopic injection sclerotherapy with cyanoacrylate was successful in achieving hemostasis, and resulted in the near eradication of duodenal varices at a 6-month follow-up.
점막하층 침윤 조기 위암에서 심달도 분류에 의한 조직병리학적 고찰
김정원,임창영,정민,노임환,고재향,강남용,최정,홍석균,송일한 대한소화기학회 2000 대한소화기학회지 Vol.35 No.3
Background/Aims: We determined the possibility of endosocpic mucosal resection in early gastric cancer with submucosal (sm) invasion, especially carcinoma in which the depth of invasion is limited within superficial. Methods: We retrospectively reviewed 35 cases of early gastric carcinoma with submucosal invasion resected by subtotal or total gastrectomy from 1994 through 1998. We analyzed several histopathological factors in relation to degree of submucosal invasion through final pathologic reports. Degree of sm invasion was designated as follows: sm1- the depth of invasion was limited within superficial, one third of the sm layer; sm2- the invasion was limited within two third of sm layer; sm3- the invasion was limited within distal one third of sm layer. Results: On analysis of the degree of carcinoma invasion into the sm layer, the rate of lymph node metastasis in sm1, sm2, sm3, and sm2+3 were 16.7%, 33.3%, 17.6%, and 21.7%, respectively. The rates of lymphatic ducts or vessels permeation in sm1, sm2, sm3, and sm2+3 were 25%, 33.3%, 11.2%, and 17.4%, respectively. The frequencies of poorly differentiated carcinoma in sm1, sm2, sm3, and sm2+3 were 16.7%, 33.3%, 52.9%, and 47.8%, respectively. Conclusions: Poorly differentiated carcinoma and lymph node metastasis were observed less often in sm1 than in sm2 and sm3.