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류동도,엄준원,손길수,조민영,송태진,김종석,목영재,김승주,Ryu Dong Do,Um Jun Won,Son Gil Soo,Cho Min young,Song Tae Jin,Kim Chong Suk,Mok Young Jae,Kim Seung Joo 대한위암학회 2003 대한위암학회지 Vol.3 No.3
Purpose: Because of an improving gastric cancer detection program and treatment methods, we can expect improved survival of patients with gastric cancer. Given the longer survival times, the chance of an occurrence of multiple primary malignant tumors other than stomach is increased in the same patients. The purpose of this study is to analyze the clinical characteristrics and the survival of patients with gastric cancer and other malignancies. Materials and Methods: A retrospective study of 3669 patients with gastric cancer observed at our department between January 1994 to December 2002 was conducted. Associated tumors were diagnosed using the Warren and Gates criteria, and included tumors that were not considered to be a metastasis, invasion, or recurrence of the gastric cancer. Results: Of all 3669 patients, $2.07\%$ (n=76) had primary tumors other than gastric cancer, $63\%$ of which were synchronous (n=48) and $37\%$ metachronous (n=28). The mean age of the study group was 64.9 (65.5 in males, 61.8 in females), and the male-to-female ratio was 4.8 : 1. The most common cancer associated with gastric cancer was a hepatocellular carcinoma ($23.7\%$), followed by colorectal cancer ($17.1\%$), esophageal cancer ($10.5\%$), breast cancer ($6.6\%$). Of the 45 patients who had undergone a resection, 14 were in stage I, 12 in stage II, 13 in stage III, and 6 in stage IV. No statistically significant differences were found between the synchronous and the metachronous groups with regard to age, sex ratio, differentiation, and stage. The 5-year survival rates of the metachronous and the resected patients were significantly higher than those of the synchronous and the non resected patients, respectively. Conclusion: Due to increasing length of the follow-up period for patients with gastric cancer, another malignancy may develop in other organs. Therefore, physicians should pay attention to detect other cancers early in these patients, and a surgical resection is recommended as the treatment of choice in the management of multiple primary cancer associated with gastric cancer.
柳東善 한국항공대학교 1989 論文集 Vol.27 No.-
The stochastic approximation method of Robbins and Monro, after some modifications, is shown to be a powerful technique for obtaing numerical solution of determinstic problems. This approach has several advantages compared to the Newton-Raphson method. Both algebraic equations and two point boundary value problems in ordinary differential equations are solved. The convergence rate is shown to be reasonvably fast and the results are surprisingly accurate.
까나리, Ammodytes personatus GIRARD 成長
柳東基,金盈蕙,姜龍柱 군산대학교 1991 群山水産專門大學 硏究報告 Vol.25 No.1
Growth of the sand eel, Ammodytes personatus was investigated from March 20 to December 14, 1988 in the costal waters of Sinsudo, Samchonpo. The rings in the otolith were used as the character for age annulus. The time of its formation was estimated to the early of May. It takes approximately 16 months for first ring to be formed in the otolith. The daily ring in the otolith of the fingerlings was formed onece a day. The relationship between the total length(L) and otolith radius(R) and body weight(W) were represented respectively as follows ; L=30.25+17.90R, W=3.1×10-7 L3.4770. Spawning season was from the middle of November to the middle of March and the peak was in December.
류동화 한국기계기술학회 2022 한국기계기술학회지 Vol.24 No.5
Motor-operated valve functions to block or connect the flow of fluid in nuclear power plant and especially safety-related valves are evaluated with operability margin calculations, that should have positive value in both open and close stroke. Although all actuators have inertia force which increase operating margin of valve closing stroke, inertia force, after control switch operation in actuator is not considered in evaluating operability margin calculation process. In this paper, the hidden margin by inertia force of each actuator model in closing stroke was studied quantitatively.
빛 누설 제거기능을 갖는 Key 스캔 및 LED 구동 회로 구현
류동열(Dongyeol Ryu),이병찬(Byungchan Lee),최성빈(Seongbin Choe),조경록(Kyoungrok Cho) 대한전자공학회 2018 전자공학회논문지 Vol.55 No.11
본 논문에서는 Key 스캔 및 LED 구동 회로의 기생 용량 성분으로 인해 발생되는 기생 전류에 의하여 구동되지 않는 LED가 켜지는 빛 누설 현상을 제거하는 회로를 제안하였다. 빛 누설 현상은 인접 LED를 발광하게 만들어 사용자의 오독을 유발시킨다. 제안하는 회로는 동작 구간의 휴지기에 기생 용량 성분에 대하여 선행 충/방전 시킴으로써 각 동작에는 영향이 없이 빛 누설을 제거하도록 구현하였다. In this paper, we propose a new Key scan and LED driving circuit to eliminate LED’s light leakage. In LED panel, we have an issue that the untargeted LEDs are turned on by the leakage current of the parasitic capacitance in the key scan and LED driving circuit. It sometimes makes users misread. The proposed circuit eliminates the light leakage with a charge/discharge process that is in the idle time of key scan and LED driving operation. As a result, the proposed technic absolutely eliminates LED light leakage.
柳東鉉 충남대학교 경영대학원 1978 經營學論文集 Vol.5 No.-
Although the small-medium-sized industries have a very important part to play in the general economy of the nation, this part of industries has been almost completely ignored in terms of support and back-up on the part of the government levels. In the process of promoting "industrial policies" which have laid greater emphasis on the larger industries, and in spite of the general ignorance of the small-medium-sized industries, the small-medium-sized industries have to a large degree contributed to the increased amount of extort earnings. However, the absence of banking, financial and administrative support, the gap between the larger and the small-medium-sized industries beginning in the rarly 1960's has led to a problem of unbalanced growth and thus to the expansion of a double structure. The 1970's prompted heavy machinery and chemicals industries as the national economic goals were directed toward the more advanced level of national economy. The small-medium-sized industries must be studied and examined in the new lights and dimensions in the sense that the small-medium-sized industries must make progress maintaining a complementary relation to the larger industries. "Marketing" is understood and introduced in this country as being peculiar to the larger industries in terms of it's being "sale-promotion strategy. The small-medium-sized industries should try to find the solution to the problem of being stagnant through old-fashioned business administration in the aggressive introduction of Marketing. The solution will include the specialization of products, the expansion of service, and the promotion of marketing through the small-medium-sized industries' cooperatives. These measures will push for the organization and specialization of the industry and help it develop in a balanced state of the national economy.