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나로도 주변 해역에서 어업자원의 계절별 어획물의 종특성과 변동
민은비(Eunbi MIN),윤주원(Juwon YUN),윤은아(Eun-a YOON),황두진(Doojin HWANG) 전남대학교 어업기술연구소 2017 어업기술연구소보고지 Vol.10 No.1
Seasonal variation in catch-per-unit-effort (CPUE), species composition and size frequency distribution of major fish were analyzed by gill net, trap net, and long line in the Korean coastal area of Go-heung in 2016. The dominant fish species were Portunus trituberculatus in gill nets, Charybdis japonica in trap nets and Muraenesox cinereus in long lines. Seasonal catch was the most in July and was the least in March. Catch by fishing gear was the highest in gill net and was the lowest in long line. The dominant species are similar to seasonal biological properties. Species compositions did not vary greatly by season.
김은재(Eunjae Kim),윤주원(Juwon Yun),정우남(Woonam Chung),김영식(Youngsik Kim),박우찬(Woo-Chan Park) 한국컴퓨터그래픽스학회 2018 컴퓨터그래픽스학회논문지 Vol.24 No.5
본 논문에서는 현실감을 높이기 위한 청각적 기술로 기하학적 방법을 사용하는 광선 추적(ray-tracing) 기반의 3D Sound rendering 기술인 Sound-tracing을 사용한다. Sound-tracing은 사운드 전파(sound propagation)단계에서 많은 비용이 든다. 사운드 전파 비용을 감소시키기 위 해 제안하는 알고리즘은 이전 프레임들의 평균 유효 frame 수를 계산하고 그 수치를 기반으로 공간에 따른 depth를 조절하는 방법이다. 실험 결과 depth를 조절하지 않은 결과와 비교하면 음원이 실내에 있었을 때 path 손실률은 0.72% 이고 탐색 및 충돌 검사 단계(traversal & Intersection test)가 85.13%의 계산량 감소를 보이고 전체 frame rate는 4.48% 증가하였다. 음원이 실외에 있었을 때 path 손실률은 0%이고 탐색 및 충돌검사 단계가 25.01%의 계산량 감소를 보이고 전체 frame rate가 7.85% 증가하였다. 이는 path 손실률을 최소화하면서 렌더링 성능을 올릴 수 있었다. In this paper, we use Sound-tracing, a 3D sound technology based on ray-tracing that uses geometric method as auditory technology to enhance realism. The Sound-tracing is costly in the sound propagation stage. In order to reduce the sound propagation cost, we propose a method to calculate the average effective frame number of previous frames using the frame coherence property and to adjust the depth according to the space based on the calculated number. Experimental results show that the path loss rate is 0.72% and the traversal & Intersection test calculation amount is decreased by 85.13% and the frame rate is increased by 4.48% when the sound source is indoors, compared with the result of the case without depth control. When the sound source was outdoors, the path loss was 0% and the traversal & Intersection test calculation amount is decreased by 25.01% and the frame rate increased by 7.85%. This allowed the rendering performance to be increased while minimizing the path loss rate.