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안영수 ( Young-su An ),백영수 ( Young-su Back ),진송한 ( Song-han Jin ),장충식 ( Choong-sik Jang ),강명희 ( Myoung-hee Kang ),차봉진 ( Bong-jin Cha ),조윤형 ( Youn-hyoung Cho ),차주형 ( Ju-hyeng Cha ),김보연 ( Bo-yeon Kim ) 한국수산해양기술학회(구 한국어업기술학회) 2019 수산해양기술연구 Vol.55 No.1
This study was conducted in order to improve opening efficiency of the miniaturized small-scale net for anchovy boat seine gear to reduce the fleet size. Field experiment was performed to observe geometry of nets by catcher boats. When the distance between the two ships was 150, 300 and 450 m and the speed of towing nets was 0.6, 0.9, and 1.2 kt, the vertical opening and actual opening of each part of the miniaturized small-scale net was as follows: the front part of the wing net, 6.8-9.5 m, 45-63%; the middle part of the wing net, 16.1-30.7 m, 34-65%; the entrance of the inside wing net, 21.6-41.2 m, 44-84%; the square and bosom, 17.4-34.0 m, 38-75%; the entrance of the body net, 16.5-29.4 m, 36-64%; the entrance of the bag net, 14.5-21.9 m, 70-106%; the flapper, 6.7-7.7 m, 81-83%, and the end of the bag net, 8.6-10.9 m, 64-81%. The tension of towing nets was measured to be 2,734-6,812 kg approximately, which indicates that the fleet can tow nets with 350 hp, the standard engine horse power. The fishing operation time was shortened comparing to existent net with the large-scale buoy attachment operation. It was also possible to operate the ship without fish detecting boat.
박충환(C. H. Park),백영수(Y. S. Back),윤동협(D. Y. Youn) 유공압건설기계학회 2019 유공압건설기계학회 학술대회논문집 Vol.2019 No.6
In recent years, small high-sped boats involving marine leisure steadily have been increasing because of enlargement of the national income and requirement of marine leisure. But the maintenance work of the small high-speed boats in dock have pointed out many faults in the small FRP-shipbuilding because of a term of works and working-space and man-power. Lifting a boat from marine to land is used to lift the boats with a crane or haul a worker by using a splint around the bottom of a boats. But docking work is limited a scale of boat correspond to crane capacity, capsized a boat and threatened the life through their carelessness. In the paper, for the purpose of developing the marine docking system for the sake of economical efficiency and safety is carried out the concept design of marine the docking system and model test and structure analysis etc.
김헌우(Hyen-Woo Kim),백영수(Young-Su Back),조제형(Je-Hyoung Cho),임장곤(Jang-Gon Im),최학묵(Hak-Mook Choi) 한국항해항만학회 2006 한국항해항만학회 학술대회논문집 Vol.3 No.2
현재 조선산업은 선박의 대형화 추세에 맞추어 선체블록 규모가 대형화되고 있다. 따라서 대형 선체블록제작을 위한 블록전문업체가 증가하고 있으며, 그에 따른 블록조립 및 정도계측기술 개발이 절실히 요구되고 있다. 이에 본 연구에서는 그간 수행해온 블록계측과 관련된 각종 데이터베이스를 구축하고, 시스템 기능구현에 핵심 기술인 소프트웨어 개발 기법, 정보 가시화 기법을 제시하고 이를 이용한 인터페이스를 개발하여 본 시스템의 구성요소를 유기적으로 연결하여 사용하는 과정을 시연함으로써 블록조립 정도평가 시스템의 유용성과 기능을 검증하였다.
최현기(Choi Hyun-Ki),김준서(Kim Jun-Seo),최윤철(Choi Yun-Cheul),백영수(Back Young-Soo),진언식(Jin Eon-Sik),최창식(Choi Chang-Sik) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.8
There are many in utilizing the flat plate structure in reinforced concrete building. This structure has drawbacks as well because the structure is vulnerable to a punching shear failure at the column connections. This research is an experimental study on full-scale interior slab-column connections of flat-plate. Three types of shear reinforcements were proposed to prevent brittle punching shear failure that could result in collapse of whole flat plate structures. A series of four flat plate specimens including a specimen without shear reinforcement and three specimens with the reinforcements was tested. The dimension of the slabs was 2620*2725* 180㎜ and the specimens had a 600*800㎜ square column at the center of the slabs. The slabs were tested up to failure using monotonic vertical shear forces. The presences of the shear reinforcements substantially increased punching shear capacity and ductility of the interior slab-column connections.
최현기(Choi Hyun-Ki),김준서(Kim Jun-Seo),최윤철(Choi Youn-Cheul),최창식(Choi Chang-Sik),백영수(Back Young Soo) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
Flat plate slab has been widely used in high rise buildings for its remarkable advantages. However, punching shear failure has become increasingly important issue with the spread of flat plate slab. A flat plate-column connection is susceptible to brittle punching shear failure, which may result in the necessity of shear reinforcement. In previous, experimental tests were performed to study the capacity of slab-column connections strengthened with various shear reinforcement, and the capacity of the specimens with curve steel reinforcement, experimental studies was performed. The results of an experiment program on punching shear performance of RC slab-column connection are presented in this paper. Specimens were full-scale representations of a one-story slab in a Korean apartment. The test results showed that failure mechanism of specimens governed by shear fracture and the strength of specimens were different according to the retrofitting strategies.