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송종홍 서울대학교 지리교육과 1979 지리학과 지리교육 Vol.9 No.1
This study attempts to study the processes of the formation and development of the transportation networks in Seoul from the period of Han-sungbu to Kyung-sungbu, and to show what facilities they had in place and time. 1. The road system of Han-sungbu was based upon that of old China, and was planned in the period of King Sejong of the Yi Dynasty. In those days, the three main streets within the castle were from Hwangtoe-hyun to Kyung-bok Palace, from Hwangtoe-hyun to the East Gate, and from Dae Kwang-tong bridge to the South Gate. There were substreets passing through the gates of Kwang-hi, He-hwa, and Soeuy. The other routes were lanes. At that time the grid pattern road system was instituted in China, but in Han-sung, roads were irregular except for several main streets. It is supposed that in China the grid-pattern road system was planned long age, based on the defense of the cities, and down through the ages, kings of the Chinese Dynasties had followed this plan. Furthermore, many plains in China made it easier to construct capital cities. In Han-sung, defense of the city was stressed too, but the plan of the transportation networks would be influenced by the many mountains and hills in the city area. It is thought that the main node was located at Hwangtoe-hyun in Han-sungbu. In those days, means of transportation depende3 chiefly on man power; domestic animals and man-dragged cars were sometimes used only for short distances. Probably, for a long time there was no spread of transportation networks or shifts of the center nodes. 2. When the China-Japan War broke out, rickshaws came into use between Han-sung and Inchon for fast cargo and passenger transportation. A street car system was started in Han-sung, the railroad system was opened, and automobiles began to appear in the streets. So we can call that time the transitional period between in the developments of transportation facilities. 3. In the 1910's and 1920's, with increasing population and the development of modern industry, more transport facilities were required, so the modem road system began to form based on the old original one. 4. Since the 1930's, the transportation networks of Seoul City have been newly made and regulated under the city government. On the base of them the network plan was established, and roads were newly extended and strengthened. As mentioned above, the transportation network system of Seoul was established first at the time of King Sejong in Yi Dynasty and after that, with the increase in population, the development of transport facilities and modern industry, the transportation network was changed and formed into a modern one. But the main nodes that were formed early in Yi Dynasty, have played the center role today, too.
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선형유도전동기의 직접벡터제어를 위한 자속검출에 관한 연구
권병일,송종홍,임형빈,임달호 한양대학교 공학기술연구소 1993 공학기술논문집 Vol.2 No.1
For implementation of vector control it is important to get accurate flux angle of motor. In this paper we investigate two types of flux sensing methods for linear induction motor. The one of which is a method of tapped winding which utilizes coils of motor itself. And the other is a method using hall effect sensor. The experiment for the two flux sensing method is carried out. In comparison of these methods it can be found that the tapped winding method is well suited for flux sensing of linear induction motor.
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