• 수산해양교육연구
• /
• 제25권4호
• /
• pp.998-1007
• /
• 2013

At container terminals, a major measurement of productivity can be work efficiency. For improving the productivity of container crane, the more efficient container yard operation method is necessary in container terminals. Recently, container terminal operators make an experiment on the dual cycle operation, which ship loading/unloading were carried out simultaneously, for increasing the productivity of container crane. In this paper, propose a system operating efficient dual cycle methods as utilize Ad-hoc technology in distributed port operation system. The dual cycle methods that proposed recognizes position information of Y/T during an action in Ad-hoc networks in case of container transfer works by real time as load an Ad-hoc module to Y/T taking charge of a container transfer with quay and yard. Utilize Ad-hoc networks technology in an operating system of container yard, and efficiently distributed processing done Y/T to container crane compare with operation systems of the existing dedicated method, and an improvement can do an operating system of an yard.

• 한국환경과학회지
• /
• 제19권4호
• /
• pp.399-406
• /
• 2010

Based on the Results of Annual Monitoring Report of Korean Marine Environment in 2006, it was shown that the coastal area of the East Sea around Korean peninsula could be clearly divided into two parts: the area of upwelling and the North Korean Cold Current. In the upwelling area, the chlorophyll-a and nutrients were increased by the influence of the decrease of temperature and the increase of salinity. These mean that the appearance of cold water due to the upwelling causes nutrient rich water and also resulted in the high productivity.

• 산업경영시스템학회지
• /
• 제36권1호
• /
• pp.17-23
• /
• 2013

This study analyzed the efficiencies of Korean fisheries cooperative's 97 operation offices in the capital and surrounding area. We used the DEA model for checking the technical and scale efficiencies in the financial business of them. We divided the business into two parts, the productivity (efficiency for increasing deposit and loan) and profitability (efficiency for increasing the profit and reducing the risk from the loan). The results show that the additional profitability increase is very difficult because most of the offices have full technical efficiency for profitability. But additional analysis based on Slack-based Measure (SBM) DEA model shows that Kyung-Gi region can increase the profitability. SBM model analysis also gives us the possibility that customized policy can apply to each offices considering each factors affecting the productivity and profitability.

• 한국수산과학회지
• /
• 제29권3호
• /
• pp.369-385
• /
• 1996

가막만 식물플랑크톤에 대한 기초생산력을 산정하기 위해 해수유동모델과 생태계 모델을 이용하였다. 이를 위해 양식기간동안 양식장이 없는 조건으로 식물플랑크톤에 대한 기초생산력을 산정하였으며 그 결과는 다음과 같다. 양식장이 없는 경우로 월별 식물플랑크톤을 예측한 결과로 월별 식물플랑크톤량의 변화를 보면 6월부터 증가하기 시작하여 9월이 가장 높은 식물플랑크톤량을 보이고 9월부터 12월까지 급격히 감소하다가 그 이후 3월까지 서서히 감소하였다. 양식장이 없는 경우로 월별 식물플랑크톤에 대해 계산한 기초생산력을 보면 양식기간 동안 범위는 $0.99\~10.20gC/m^2/d$로 평균 $4.43gC/m^2/d$이였다. 월별 변동을 보면 6월부터 급격하게 증가하기 시작하여 8월에 가장 높은 생산력을 보이고 8월 이후 12월까지 급격히 감소하다가 1월 이후에 3월까지 서서히 증가하는 경향을 보였다.

• 수산경영론집
• /
• 제42권2호
• /
• pp.85-96
• /
• 2011

Oliver flounder population density affect Oliver flounder growth and mortality rate. In laboratory pilot experiment, Oliver flounder growth rate is inversely proportional to stocking density. But previous study has not proved external validity. This study is aimed to analyze the effect of stocking density on the Oliver flounder culture farms in Jeju Island. In order to do this, I selected 13 farms in Jeju island as a sample. In the study, various analytical methods including productivity analysis, regression analysis, statistical analysis were conducted for 13 Oliver flounder culture farms. The result of analysis can be summarized as follows. First, in case of the Oliver flounder culture farms, Bertalanffy equation is not applicable to the Oliver flounder growth. Second, the Oliver flounder stocking density, defined as the surface area of Oliver flounder per $m^2$ of water surface area, is preferred to density definition defined as the weight of Oliver flounder per $m^2$ of water surface area on the Oliver Flounder Culture Farms case. Third, growth rate and production weight on the Oliver flounder culture farms are inversely proportional to stocking density on spearman rank correlation test. When extensive comparable biological and culture condition data become available, analysis model can be easily modified to yield more accurate results.

• 생태와환경
• /
• 제45권2호
• /
• pp.139-149
• /
• 2012

섬진강 하구역의 계절별 일차생산력의 변화는 하계 8월에 가장 높은 일차생산력을 보이고 있으며, 수온과 광 조건이 향상되고 주변 육지로부터 유입되는 영양염의 영향으로 높은 결과를 보이고 있다. 특히 섬진강 하구역의 상류정점들은 육상기원 영양염의 유입이 다른 정점들에 비해 활발하게 이루어 짐으로 더 높은 생산력을 보이고 있다. 식물플랑크톤 색소 조성 결과 diatoms의 지표색소인 Fucoxanthin이 조사시기와 정점에 상관없이 높은 농도를 나타냈다. 이는 현미경 종 동정 결과와 일치함을 보이고 있으며 일차생산력과 보조색소 분석 결과 그리고 종 동정 결과를 비교하여 볼 때 규조류 (Skeletonema costatum)가 일차생산력에 가장 크게 기여하는 것으로 사료된다. 본 연구를 통해 자연형 하구인 섬진강에서 시 공간적 일차생산력 변동을 확인할 수 있었으며 또한 식물플랑크톤의 대략적인 군집구조와 일차생산력 계절 변동을 평가할 수 있었다. 이러한 연구결과는 향후 섬진강 하구 내 생태 모니터링에 대한 기초자료로 활용될 수 있을 것으로 판단되며 수계 내 건강성 평가 및 수질관리를 위한 연구에 유용한 자료로 활용될 것으로 사료된다.

• 한국수산과학회지
• /
• 제18권1호
• /
• pp.74-83
• /
• 1985

대한해협 서수도의 거제도 남단 연근해를 중심으로 3개 정점에서 계절별로 수층별 chlorophyll a 함양을 분석하고 in situ 법으로 기초생산량을 측정하였다. 1. 1983년 추계의 기초생산력은 표층에서 $9.24{\sim}13.05\;mg\;C/m^3/h$ 범위로서 연중 가장 높았다. chlorophyll a 함량은 $0.66{\sim}1.22\;mg/m^3$ 범위로서 역시 가장 높았다. 2. 1984년 동계의 기초생산력은 표층에서 $0.75{\sim}1.77\;mg\;C/m^3/h$ 범위로서 하계보다 높았다. chlorophyll a 함량은 $0.19{\sim}0.41\;mg/m^3$ 범위로서 역시 하계보다 높았다. 3. 1984년 춘계의 기초생산력은 표층에서 $3.42{\sim}6.68\;mg\;C/m^3/h$범위로서 추계보다 낮았다. chlorophyll a 함량은 $0.34{\sim}0.64\;mg/m^3$ 범위로서 역시 추계 보다 낮았다. 4. 1984년 하계의 기초생산력은 표층에서 $0.57{\sim}0.79\;mg\;C/m^3/h$ 범위로서 연중 가장 낮았다. chlorophyll a 함량은 $0.11{\sim}0.17\;mg/m^3$ 범위로서 역시 가장 낮았다. 5. 동화수는 연중 비교적 높았으며 특히 추계와 춘계에 높았고 겨울에 가장 낮았다. 6. 기초생산량은 수심의 증가에 따라 급격히 감소하였다.

• 수산경영론집
• /
• 제32권2호
• /
• pp.23-50
• /
• 2001

The study tries to suggest one kind of method for measuring expost commutative fisheries damages caused by a large scale coastal reclamation. The situation of fisheries damages which the paper is considering is different from those of general cases:the latter is a priori investigation but the former is a posteriori one. Therefore we need a different approach for exact measurement of such kind of fisheries damages. The key contribution of the paper is to try to estimate a decreasing production function using the results of present investigation and several statistical data about our coastal fisheries productivity and environmental deterioration. Using the function, the paper tries to derive the expected catch amount and damage amount.

• 수산해양교육연구
• /
• 제9권2호
• /
• pp.121-148
• /
• 1997

The Japanese fishery management system has been established on the basis of various experience accumulated over many years. The fishery management system in Japan, one of the oldest fishery management systems in the world, is aimed at ensuring comprehensive utilization of the water surface and developing fishery productivity, by giving protection of the breeding environment of aquatic animals and plants, enabling the appropriate use of fishery grounds, preventing and solving disputes over fishery grounds and making other fishery adjustments. Japanese Fishery Law has been changed largely into (1) The Feudal Era(to 1900), (2) The Oldest Fishey Law(1901~48), (3) Current Fishery Law(1949 to present). Japanese fishery legislation is designed as a single package combining coastal, offshore and distant-water fisheries. During the period of the old fishery law, numerous conflicts arose over the joint use of fishing grounds and fish stocks. Such conflicts occurred among users of the same gear as well as between users of different gears or of different sizes of fishing craft. Large scale conflict sometime occurred between neighbouring fishing communities due to a lack of fairness in principle and coordination in practice. Therefore, the new fishery law enacted in 1949. This law was designed primarily to realize the most effective and rational use of fishing grounds and fishery resources, the basic philosophy being that, through democratic organization by fishermen themselves, productivity would be stimulated and incomes and living standards eventually improved. Nowadays, Community Based Fisheries Management through democratic organization by fishermen themselves have to enforce at coastal fisheries. This Community Based Fisheries Management manage to fishery resources by fishermen themselves and harvest in collaboration with that resources. Therefore, this paper is intended to briefly to describe the entire system and the historical development of Japanese fishery legislation in order to assist in reform of our country fisheries management regime.

• 수산해양기술연구
• /
• 제50권4호
• /
• pp.495-501
• /
• 2014

In order to propose basic references for the policy making of fishing vessel fishery by Jeju Special Self-Governing Province, we have obtained the basic productivity through analyzing operating days and catches of 16 sample fishing vessels registered in Aewol port, the north of Jeju island in the year of 2011. In addition, to compare with the basic productivity of southern sea area in the Jeju island, that of 7 sample fishing vessels registered in Kangjung port was used. Around Aewol port, average operating days during the main catch period from July to October were over 15 days a month. A average daily catch of fishing vessels was minimum 21.0 kg in May and reached to maximum 54.5 kg in December, showing U-shaped catch pattern through the year. The trend formula of the average daily productivity (y) depending on a tonnage (x) of fishing vessels around Aewol port was described by the equation, y = 18.867 ln(x) + 11.001, and that around Kangjung port in the year of 2009 was understood to be y = 23.271 ln(x) + 25.715. As a result, it seemed that the productivity of fishing vessels around Kangjung port, operating in the southern sea area of Jeju Island, was much greater than that of fishing vessels around Aewol port in the northern sea area of Jeju Island. Especially, that of fishing vessels less than 10 tons was 35-40% more.