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김문관,안장영 제주대학교 해양연구소 1998 해양자원연구소연구보고 Vol.22 No.-
Diurnal migration of fish schools in the set-net fishing ground was investigated by telesounder and underwater video camera in relation to the catching function of the set-net. The investigation took place in the Hamdok set-net fishing ground located in the coast of Cheju Island, from July 25 to August 7 . 1995. The obtained results are summarized as follows: 1. The rate of entering and leaving the set-net was 30%. among the fish schools approaching the set-net area. 2. The greatest number of fish schools were observed between 12:00 and 18:00, after which the schools suddenly disappeared. 3. The swimming speed of horse mackerel and mackerel were 10~40cm/sec dominant speeds were 25~35cm/sec(58%) and 15~25cm/sec(78%) respectively.
김문관 제주대학교 1970 논문집 Vol.2 No.-
Many claims have arisen from our trade with other countries since 1966. This prompted me to study foreign trade claims. A foreign trade claim means that one party suffered damages from the other party in foreign trade, and then makes a claim on the other party for compensation. There are three kinds of claim. The first is the claim which arises inevitably in the process of trade with other countries. The second is the market claim. The third is the intentional claim. A trade claim arises in the case where the agreement of the sales contract between the parties is imperfect, or the parties don't execute the agreement of the sales contract faithfully. In orther to check claims, the foreign trader firstly has to be familiar with foreign trade customs, and secondly should have the proper attitude. There are three ways of settling foreign trade claims. The first is a settlement by the agreement between the parties. The second is a settlement by mediation or arbitration. The third is a settlement by litigation. Besides the above, I treat the problems of the responsibilities of the parties in the case of abnormal conditions arising from a state of war. In order to increase the exports of our country, the foreign traders of our country have to try to prevent claims.
김문관,정상희양 제주대학교 해양연구소 1997 해양자원연구소연구보고 Vol.21 No.-
The moving behaviour of fish schools in the bag-net of a large scale set-net was investigated using scanning sonar. This was done in the Kishihata set-net fishing ground, which is located in Nanao city Ishigawa prefecture in Japan. from Nov. 18. 1992 to Dec. 4. 1992. The results obtained are summarized as follows: 1. Moving behaviour of fish schools between two bag-nets can be divided into two groups. The first group includes Frigate mackerel. Yellowtail and Jack mackerel. while the second group consists of Tunas. The Tunas often did move. however the first group rarely moved. The result suggests that fish school movements depend on the type of fish. 2. As for two bag-nets. Frigate mackerel. Yellowtail and Jack mackerel, tended to appear in the afternoon. however Tunas appeared in the daytime. Therefore, the appearance of fish schools depend on the type. 3. The peak speed of Frigate mackerel. Yellowtail and Jack mackerel was 90cm/sec at the first bag-net. 60cm/sec at the second bag-net, but through the second slope-net they moved at 120cm/sec. Therefore. the fish schools that move through the second slope-net move faster than those that move at the first bag-net. and the second bag-net. The result suggests that the second slope-net can be a factor which affects fish schools.