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데이터마이닝 기법을 이용한 전철전력설비 이상상태 데이터 분석
신승권,김재원,조규정,정호성,김형철 대한전기학회 2020 전기학회논문지 Vol.69 No.11
It is necessary to develop a novel technology for predicting and diagnosing anomaly conditions of the railway power system, such as voltage drop and distortion so as to prevent a fault due to a power outage of the railway power system during railroad operation. Therefore, for intelligent management and maintenance of electric power equipment for railway system, an algorithm for an anomaly condition monitoring system based on real time TEO information was developed, and field installation for performance verification of the developed module was completed. In this paper, we describe the data mining process of a real-time monitoring system for anomaly conditions of the railway power system and the process of verifying the operation of the monitoring system.
辛承權 한양대학교 사회과학대학 1993 社會科學論叢 Vol.12 No.-
Historically the Korean peninsula has been a battleground between China, Russia, and Japan, each of which considered Korea vital to its security. At the end of the Second World War Korea once again became the buffer zone for China, the Soviet Union, and the United States. During the war the Russians kept complete silences as to their aspirations in Korea, although they have agreed to establishing a four-power trusteeship. The Russians have formulated for occupation of the entire Korean peninsula, but they agreed to partition Korea along the 38th parallel in order to avoid a direct confrontation with the United States. Once partition had become an accomplished fact, the Soviet goal was to solidify their control over north Korea and to block any attempt to implement the four-power trusteeship. At the meeting of the Council of Foreign Ministers in Moscow in December 1945, Stalin had plans to communise the entire Korean peninsula, but he kept silence about it. The Moscow trusteeship agreement was to oust all foreign influences and establish a Korean provisional government which is composed of left wing representatives and "friendly" to the Soviet Union. By the end of 1948 it became clear that the Soviet and American troops would be withdrawn from the Korean peninsula. In early 1949 Joseph Stalin began to prepare for the Korean War. Stalin's goals in the Korean War were the domination of all of the Korean peninsula in order to strengthen Soviet power and influence in the Far East. In his Memories, Nikita Khrushchev said that the Korean War was not initiated by Stalin but by Kim Il-sung. Since Stalin distructed Mao Tse-tung, scholars have assumed that he did not consult the Chinese leader during the Sino-Soviet summit meeting in December 1949. However, recently released Kremlin documents by Dmitrii Volkogonov make clear that Stalin consulted Mao in Moscow in his Korean War strategy. From the beginning Stalin asked Kim Il-sung to approach Communist China concerning the war. Stalin's strategy was to weaken China through protracted military conflict which would confined to the Korean peninsula and the Chinese mainland. Stalin predicted that China would participate in the Korean War. Stalin's aim was to weaken China and make the Mao regime even more dependent on the Soviet Union. The Soviet Union's boycott of the UN Security Council from January 1950 until after the Korean War began was Stalin's strategy. The Russians calculated to first boycott the council on the pretext of pressing for recognition of communist China, while knowing that United States would intervene in the war and the Chinese would send in troops. Stalin tried to camouflage the Korean War as a war for national liberation. However, from the beginning the United States considered the war was started by the Soviet Union. In July 1951 Stalin was confronted with most critical situation. The Truman government was considering using atomic boms against the Chinese troops in Korea. Statlin had no choice except to terminate the Korean conflict. After Statlin's death, in July 1953, China ended the Korean War.
辛承權 전북대학교 의과학연구소 1981 全北醫大論文集 Vol.5 No.1
Breech presentation is the most frequent abnormal one, and it causes several comlication during labor such as prematurity, low birth weight, congenital anomaly, increased C-section rate, and increased perinatal morbidity. We studied 411 cases of breech delivery, including 364 cases of single and 48 cases of multiple preg., at the Kwangju Christian Hospital during five and half years from January 1975 to June 1980. The result were as follow ; 1. The incidence of breech delivery was 3.39% 2. Most patients were between 25 and 29 years old. The incidence was increased in women over 40, or whose parity was more then 5. 3. In 74.02% of patients delivery occurred between 38-42% weeks of gestation and 22.38% of the nenates less than 2500gm. 4. Regarding the type of breech, the most common was Frank(41.62%), and the others were incomplete(34.32%), unclassified(22.37%), and complete(1.69). 5. The duration of labor averaged 10.69 hours in primipara and 6.42hours in multipara, without significant difference among the types of Breech presentation. 6. The incidence of p.r.o.m was 16.79%(69 patients), and was lowest in incomplete breech presentation(14.89). 7. The incidence of cord prolapse was 5.11%(21 patients), and in 85.7%(18 patient) it was incomplete. 8. The mode of delivery were PBE, (50.4%), c/s(24.6%), TBE.(22.8%), and spontaneous. 9. The incidence of c/s for primipara increased slightly year by year except for 1980. 10. The incidence of congenital anomaly was 2.7%. 11. The perinatal mortality was 16.7% and the leading cause was prematurity. 12. Apgar score was 7.89 for vaginal delivery and 9.45 for c-section.