• 수산해양기술연구
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• 제47권4호
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• pp.300-315
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• 2011

The investigation for the catch and species composition in the deep sea of the East Sea was done to search marine organisms using some kinds of traps with small commercial fishing vessel near Goseong, Korea from 2008 to 2009. The experiments was carried out with some different traps at the depth of 200m, 400m, 700m and 1,000m. In 2008, the amount of catch with rectangular, cone and drum net traps was 91.4kg with twelve trips and the proportion of catch with rectangular and cone traps was high. Dominant species caught were Aniwan whelk (57%), snow crab (12%), hunchback sculpin (7%) and red snow crab (5%). The catch of Aniwan whelk was done well with rectangular and cone traps at the depth of 700-1,000m. Snow crab was mainly caught with rectangular and cone traps at the shallower depth of 200m, while red snow crab caught a lot with cone trap at the deeper depth of 700m. In 2009, the amount of catch with rectangular, cone and round traps was 92.4kg with nine trips. The proportion of catch with round trap was higher than that with cone trap. Dominant species caught were snow crab (67.1%), Aniwan whelk (14.8%) and northern shrimp (9.8%). Snow crab was caught well with round trap at the depth less than 400m.

• Ocean and Polar Research
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• 제39권1호
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• pp.61-71
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• 2017

This study estimates the cost function through offshore fishery cost data and analyzed the economies of scale of Korea's offshore fishery. For the estimation of the cost function, translog cost function was used, and the analysis implemented the panel analysis of the panel data. Also, annual economies of scale of the offshore fishery and economies of scale of 14 offshore fisheries in 2015 were analyzed using translog cost function coefficient estimation. The analysis result of economies of scale of Korea's offshore fishery showed that with the exception of 2003, economies of scale exist in all periods of time. However, as it almost reaches the minimum efficient scale, it was revealed that further scale expansion will bring inefficiency. Thus, according to the analysis result, Korea's offshore fishery requires a scale reduction policy rather than scale expansion policy, and this seems to coincide with the current government's fishery reconstruction policy and its practice such as the fishing vessel buyback program. The analysis result of economies of scale of each offshore fishery in 2015 showed that economies of scale of each offshore fishery exists with the exception of five trawl fisheries such as large pair-trawl and large otter trawl and large purse seines. This strongly suggests that the five fisheries and Large Purse Seines with non performing economies of scale need urgent scale reduction and should be the first target for the government's fishery reconstruction policy.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2003년도 추계학술발표회
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• pp.75-83
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• 2003

목포항 접근 항행구역은 30마일 구간의 협수로로 이루어져 있으며 항로가 여러 지점에서 교차하고 있어 교통이 혼잡한 수역이다. 특히 목포구를 제외한 외측수역은 항로지정이 되어 있지 않으며 어망 및 광업권이 산재하여 선박의 안전운항을 위협하고 있다. 따라서 본 연구에서는 주변환경 및 항행 위해요소 분석, 교통실태 관측조사 및 해양사고 분석을 통한 해상교통환경 평가를 실시하여 항행안전을 위한 대안을 제시하였다.

• 해양환경안전학회지
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• 제26권1호
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• pp.8-14
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• 2020

최근 4년 간 발생한 해양사고 통계자료(중앙해양안전심판원, 2018)에 의하면 충돌사고의 대부분이 어선을 포함한 소형선에서 발생하고 있으며 경계소홀, 항행법규 미준수 등의 인적 요인이 충돌사고의 주요 원인이 되고 있다. 이에 따라 사고 예방을 위해 교육, 훈련을 확대 강화하고 있지만 소형선에 대한 사고는 여전히 일어나고 있는 실정이며 인적 요인으로 유발되는 사고를 줄이고자 기술적 방안이 지속적으로 개발되고 있다. 본 연구에서도 상대적으로 고속인 소형선에 송·수신 주기가 빠른 WAVE 통신기술을 적용하여 충돌 회피시스템 구성하므로 인적 요인으로 인해 발생하는 사고를 감소시키고자 하였다. 그에 따라 통신 범위의 적정성 판단하고 회피동작 시간과 범위를 설정하였으며 그 것을 토대로 제어 알고리즘 고안 하였다. 그리고 통신단말기-제어기-조타장치를 구성하고 충돌회피 모의 시뮬레이션을 수행하므로 경보신호 발생 시 회피동작의 정상 구현을 확인하였다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2005년도 춘계학술대회 논문집
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• pp.273-277
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• 2005

본 논문에서는 양식어장을 보호하기 위한 어장 탐지 시스템에 있어서 칼만필터의 적용기법에 대해 논의하였다. 어장탐지시스템(FDS)은 어장에 침입하는 도전선박을 실시간으로 식별하고 어장의 위치변동 등을 파악하고자 하는 것이다. 본 연구에서는 양식어장으로의 접근 물체 중에서 F-AIS를 탑재하지 않은 의심선박에 대해 추적(tracking)을 하기 위해 칼만필터 기법을 적용하고자 한다. 백색잡음을 동반한 가속도계의 대상물에 대하여 위치 및 속도판독을 위한 시뮬레이션을 행하고 트랙킹 시스템으로의 적용 가능성에 대해 살펴본다.

• 한국보건간호학회지
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• 제18권2호
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• pp.276-285
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• 2004

The purpose of this study was to help in explaining the necessity of education on complementary and alternative medicine(CAM) and opening relevant curriculums in nursing education by grasping the kinds of CAM in which nursing students want to be opened. Data were collected from September 27, 2003 through October 20, 2003. A group of 865 nursing students were surveyed using questionnaires in seven universities whose curriculums on CAM have not been available. Collected data were statistically analyzed by using SAS 8.02 system, and the study results are as follows: 1. The average of subjects' behavior toward CAM was 3.52 of the total 5 with practical affairs 3.79. medical treatment 3.79, social concerns 3.84, and communication 3.78. 2. Most nursing students $(90.6\%)$ did not precisely understand the meaning of CAM although they had heard of it. Most of them $(85.5\%)$ had no experience of applying CAM. The study also revealed that more qualified CAM lecturers in the future are needed: specialist in the relevant field $(83.2\%)$, doctor and herb doctor $(6.5\%)$, clinical nurse $(6.0\%)$ and professor of the department of nursing science $(4.3\%)$. 3. Concerning students' behavior toward CAM, there were statistically significant difference between students from agrarian and fishing villages (F=4.91. p=.007) and the others. 4. CAM courses that students want were therapeutic touch (massage) $(22.9\%)$. aroma therapy $(14.8\%)$, manual healing methods $(14.7\%)$, treatment of blood vessel $(8.3\%)$, foot reflexology $(7.9\%)$, and heart remedy $(6.8\%)$. In conclusion, the study indicated that nursing students had positive attitudes toward CAM and for this. healers should have a frank talk with patients in order to maximize symptom-relieving effects. However, the study showed that most nursing students did not understand the exact meaning of CAM. Considered the fact that improvement of both health status and quality of life will be an important issue in the future, active introduction and education of CAM in nursing curriculum are a matter of necessity.

• 수산해양기술연구
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• 제52권3호
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• pp.276-280
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• 2016

This study investigated luring distributions by water layer of common squid which were targeted by angling fishing vessels equipped with LED and metal-halide lamps using a scientific echosounder with a 120 kHz frequency in order to develop energy-effective underwater fish aggregation devices. In the analysis, angles of a transducer were changed from $0^{\circ}$ to $45^{\circ}$ and were rotated every $10^{\circ}$ horizontally. It was shown that common squid were densely distributed from the surface to 40 m and they were also distributed in directions of $10^{\circ}{\sim}+30^{\circ}$, $-30^{\circ}{\sim}-60^{\circ}$, and $-120^{\circ}{\sim}-130^{\circ}$with the head of vessel as the center. Comparative results of angles of transducer on acoustical densities of common squid distributing in 21~40 m water depth showed an average $101.8m^2/nm^2$ in vertical direction of $0^{\circ}$, $12.3m^2/nm^2$ in angle of $30^{\circ}$, and $42.4m^2/nm^2$ in angle of $45^{\circ}$, respectively. It implied that more considerations on acoustic scattering strength by incidence angle direction of the transducer and swimming oriental angle direction of common squid would be required.

• 해양환경안전학회지
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• 제10권1호
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• pp.15-22
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• 2004

목포항 접근 항행구역은 30마일 구간의 협수로로 이루어져 있으며 항로가 여러 지점에서 교차하고 있어 교통이 혼잡한 수역이다. 특히 목포구를 제외한 외측수역은 항로가 지정되어 있지 않고 어망 및 광업권이 산재하여 선박의 안전운항을 위협하고 있다. 따라서 본 연구에서는 주변 환경과 항행 위해요소 분석, 교통실태 관측조사 및 해양사고 분석을 통한 해상교통환경평가를 실시하여 항행안전을 위한 요소를 제시한다.

• 한국수산과학회지
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• 제51권4호
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• pp.435-443
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• 2018

The Antarctic krill Euphausia superba is important commercially and ecologically as a basic component of the Antarctic Ocean ecosystem. To manage this resource, it is important to determine the distribution and standing of krill in the water layer. Acoustic methods can capture information about the entire water layer quickly. Acoustic surveys were conducted from March 3 to March 14, 2017, using the commercial fishing boat Sejong (7,765 tons). Acoustic systems with a frequency of 38 kHz and a 200 kHz commercial echo sounder (ES70, Simrad, Norway) were used and the acquired data were processed using post processing software. The density and standing of Antarctic krill were determined using the two-frequency difference method, using the characteristics of two frequencies. To compare the frequency difference of krill, the method using the frequency difference according to the krill length, recommended by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) and the values extracted according to the krill length at survey stations where only krill were collected during the study period, were compared. The frequency difference ranges were 3.96-5.91 dB and -3.0~13.8 dB, respectively.

• 해양환경안전학회지
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• 제14권3호
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• pp.219-225
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• 2008

해양사고가 빈번하고 교통밀도가 높은 서남해 연안해역에 통항선박의 안전과 항만 입출항 선박의 지원을 위해 해상교통안전관리체 제가 2006년 7월부터 시행되고 있다. 본 해역에서 RADAR와 AIS의 정보를 이용하여 해상교통환경평가를 위해 통항량을 조사하고, 최근 5년간 해양사고의 분포 경향을 조사하였다. 또한 동 해역에서 자연환경의 영향, 어장현황 및 설문조사 분석을 통해 연안해역 항행위해요소를 알아보았다. 최근 5년간 대상해역에서 상선의 해양사고는 점진적으로 감소하는 경향을 보였으나. 어선의 경우는 반대로 증가하는 경향을 보였다. 6월에서 8월 사이의 짚은 안개와 어로행위 및 VHF 청취의무를 이행하지 않는 선박으로 인해 항행위해요소로 나타났다.