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Java3D를 이용한 3D 사용자 인터페이스 기법의 개발
오태철(Tae-Cheol Oh),고명철(Myeong-Cheol Ko),최윤철(Yoon-Chul Choy) 한국정보과학회 2001 한국정보과학회 학술발표논문집 Vol.28 No.2Ⅱ
최근 인터넷과 비몰입형 가상현실 기술을 기반으로 하는 3D 사이버스페이스 분야에 대한 관심이 고조되고 있다. 그 동안 3D 그래픽의 처리나 네트워크 상의 데이터 전송기술과 같은 하드웨어 분야에서는 많은 개선이 있었으나 가상환경 내부의 다양한 상호작용을 처리하는 부분에 있어서는 연구가 미진한 실정이다. 특히 3D 사이버스페이스 상에서 참여자의 의사결정 및 상호작용의 수단이 되는 3D 사용자 인터페이스에 대한 연구는 성공적인 연구사례가 보고되지 않았다. 현재 실험적인 수준의 3D 사이버스페이스가 앞으로 좀더 활성화 되고 일반화 되기 위해서는 사용자 관점을 지원하는 친숙하고 자연스러운 3D 사용자 인터페이스에 대한 연구가 필요하다. 본 논문에서는 현재 가장 일반적인 입력 장치로서 사용되는 2D 마우스를 이용하여 3D 사이버스페이스 상의 다양한 객체들을 자연스럽게 조작할 수 있게 하는 3D조작 인터페이스를 제안한다. 제안된 3D 조작 인터페이스를 실시간 환경에 적용하여 검증한 결과 3D 사이버스페이스 상에서의 상호작용을 매우 효과적으로 지원할 수 있음을 확인하였다.
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김문관 ( Mun-kwan Kim ),박수현 ( Su-hyeon Park ),강형철 ( Hyeong-cheol Kang ),오태철 ( Tae-cheol Oh ),박용석 ( Yong-seok Park ),안영일 ( Young-il An ),김석종 ( Suk-jong Kim ) 한국어업기술학회 2017 수산해양기술연구 Vol.53 No.2
To improve the efficiency of hairtail trolling, it is important to gain an accurate understanding of the distribution of fish based on their diurnal vertical migration patterns. This study evaluated the vertical distribution of hairtails through catch efficiency tests using vertical longlines. Five replicate tests of the efficiency were carried out on the eastern coast of Jeju Island from August to September 2016, from 11:00 AM to 03:00 PM in the daytime and 11:00 PM to 03:00 AM in the nighttime. The fishing gear was composed of 20 hooks per line set, numbered in order from the first hook near the surface to the last hook on the seabed. The depth of the first hook was 18 m, and that of the last hook was 86 m. Pacific saury was used as the baits. In total, 10 sets of fishing gear were used per trip. After fishing, we counted the hairtails at each numbered hook, which were summed up both by number and in aggregate. A total of 232 hairtails were caught using 2,000 hooks: 193 individuals at daytime and 39 at nighttime. The hook rate was 11.5% : 9.6% at daytime; 2.0% at nighttime. For both daytime and nighttime catches, there were variations in the hook rates at each numbered hook. In the daytime, a maximum of 28.5% catches occurred at hook number 18, followed by 21.4% at number 20, and 10.7% at number 17, accounting for 60.6% of the daytime hook rates. In the nighttime, a maximum of 23.0% catches occurred at hook number 1, followed by 15.3% at hook number 4 and 9, accounting for 53.6% of the nighttime hook rate. Based on the above results, hairtails are usually distributed in deeper region in daytime, whereas they occur near the surface in nighttime. Therefore, it is necessary to position trolling lines according to diurnal vertical distribution layers of hairtails for fishing efficiency.
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김문관 ( Mun-kwan Kim ),안영일 ( Young-il An ),박수현 ( Su-hyeon Park ),오태철 ( Tae-cheol Oh ),강형철 ( Hyeong-cheol Kang ),박용석 ( Yong-seok Park ) 한국어업기술학회 2016 수산해양기술연구 Vol.52 No.3
This study carried out an experiment to find out the reaction of hairtail, Trichinus lepturus to the colors of LED light as a basic study on the development of the trolling gear and a method to enable the day-night operation. We used hairtails caught around Seongsan-po, Jeju Island by set nets and hairtail angling. The seven hairtails of the average length 68.9 (SD 9.2 cm) and the average weight 135.9 g (SD 47.9 g) were adapted themselves in the experimental water tank, 15 m Self-Governing 1.7 m in height and 1.5 m in depth, and then they were studied. We conducted experiment at the Ocean and Fisheries Research Institute in Jeju Special Self-Governing Province, from November to December 2015, and the sea surface temperature was between 16.5 and 19.5℃. The four colors of LED light, blue, white, green and red, were set up to transmit downward from the marginal area of tank. The 1 meter depth light intensity of LED colors is as follows: 0.09 w/m2/s (blue), 0.18 w/m2/s (white), 0.04 w/m2/s (green) and 0.007 w/m2/s(red) To know the optimum LED color light, we selected one with better reaction rate after comparison of two colors simultaneously and the selected color was again compared to the other color in a tournament style two times a day (day and night) and ten times totally. The reaction rates were shown as the frequencies of hairtail appearance for 5 minutes in the lighting zone after turning on the LED lights. The reaction rate of the blue was at 97% unlike the red 3% (p < 0.001). The blue was at 75% unlike the green at 25% (p < 0.001). The blue was at 67% unlike the white at 33% (p < 0.001). Therefore, the color of light source showing the highest reaction rate was the blue.
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