• 수산해양기술연구
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• 제41권4호
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• pp.248-262
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• 2005

The purpose of this study was to identify the state of demersal fish resource catch by small trawlers, which live in the southern waters off Goheung. We investigated the results of catch of sample fishing vessels, and performed fishing experiments using the actual fishing operation vessels from early November in 2002 till end of October in 2003. The daily amount of catch per vessel of the 35 small trawlers selected as sample vessels was the highest in summer seasons(June and July) as 70kg and the lowest in winter seasons(January and February) as 45kg and Octopus minor occupied as 17 to 30kg nearly 30% of the total catch. Additionally the catch of Octopus minor per vessel, per dragging hour ranges 3 to 6kg, which is the highest in March and June and the low in January to February, April to May and September. In the fishing experiments using small trawler, during the study period, a total of 75 fish species were collected. The number of individuals by species consisted 58.2% in Shrimps, 17.8% in Fish, 2.3% in Cephalopod. Of these, Parapenaeopsis tenella was the highest in 29.2%, Squilla oratoria and Crangon hakodatel was 14.6% respectively and Octopus minor was 0.2% of the total number of individuals. As far as the appearance number of individuals by month was concerned, February was the highest and then May, April and June followed in order, and October showed the lowest. Additionally the monthly catch per dragging was the lowest in December to January as 20kg and the highest in July as 160kg. Specially, Octopus minor was caught throughout the year regardless of season and the catch was the highest at the period from March to June. When looking into the body mean length of dominant fishes caught, we could observe the followings; Trachurus japonicus 8.9cm, Cynoglossus robustus 10.8cm, Muraenesox cinereus 15.3cm, Setipinna taty 10.3cm, Amblchaeturichfhys hexanema 9.3 cm and Collichthys niveatus 8.9cm, most of which were in their immaturity when they were caught.

• 수산해양교육연구
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• 제27권6호
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• pp.1745-1754
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• 2015

This study aimed to analyze the relationship between sea temperatures and anchovy catch of Anchovy drag net fishery using annual time series data from 1970 to 2013. In the analysis, time series data on variables (CPUE, sea surface temperature, and 10m temperature) were estimated to be non-stationary from unit root tests, but one long-term equilibrium relation among variables was found from a cointegration test. From an exclusion test, a 10m temperature would not have relations with CPUE and sea surface temperature. The result of regression analysis on sea surface temperature and anchovy catch indicated that the sea surface temperature would have positive impacts on the anchovy catch. It means that when the sea surface temperature would increase, all other things including the current level of fishing effort being equal, the catch of anchovy was predicted to increase. More specifically, the result showed that when 1% of sea surface temperature increases, CPUE would be increased by 2.81%.

• Fisheries and Aquatic Sciences
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• 제15권4호
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• pp.345-352
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• 2012

To predict catches of Pacific anchovy Engraulis japonicus larvae, anchovy eggs were collected in the coastal waters off Gunsan, Korea, in the Yellow Sea during the main spawning season (June to July) from 2003 to 2009. A ring net was repeatedly towed vertically at 10 stations during the daytime to sample eggs. Catch data estimated by auction sales were obtained from the Fisheries Cooperatives Union of Gunsan City and daily water temperature data in the outer harbor of Gunsan City during the survey periods were obtained from the National Oceanographic Research Institute. A significant relationship was found between anchovy egg density from June to July and larval catch from July to October in the same year. Catch of anchovy larvae in Gunsan were also high when optimal growth temperatures were recorded in the coastal waters off Gunsan in July. Although the recruitment success or failure of anchovy larvae can be predicted from variability in egg density, we suggest that mean daily water temperature is a more efficient indicator for predicting variability in catches of larval anchovy in the Yellow Sea.

• 수산해양기술연구
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• 제49권4호
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• pp.385-394
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• 2013

This study has conducted a comparative analysis on the fishing efficiency of LED fishing lamps by squid jigging vessels, the Yeongrak-ho (16 tons) and Somang-ho (9.77 tons), which operated during September and October 2010 and during October 2011, comparing with MH (Metal Halide) fishing lamp-equipped fishing vessels. This study has also examined vessel's fuel consumption level. The light powers of LED fishing lamps of the Yeongrak-ho and Somang-ho were 25.8kW and 32kW, respectively. Those of the MH fishing vessels, that is, the MH fishing lamp-equipped fishing vessels, were 105kW and 81kW, respectively. The average squid catch in number of an LED vessel, Yeongrak-ho, was 39.2% of the MH fishing lamp-equipped fishing vessels; however, that of the Somang-ho improved to 78.7% of the MH fishing lamp-equipped vessels. Average catch in number by Yeongrak-ho crew was 2.6 times more than catch in number by automatic jigging machines. Average catch in number by MH fishing vessel crew was 1.8 times more than that by automatic jigging machines. An LED vessel, Yeongrak-ho's fishing rate was 17.5%~152.2% of the MH fishing vessels, that is, 61.1% on average, in comparison of combined catch in number per automatic jigging machine and per crewmember. Somang-ho's fishing rate was 6.7%~127.6% of the MH fishing vessels, that is, 73.1% on average. The average fuel consumption level of the Somang-ho, throughout its departure from to arrival at the port, was 475.7l, and that during fishing hours was 109.6l, or 23.0% of the total fuel consumption level. Somang-ho's fuel consumption level per fishing hour was 9.7l on average.

• 수산해양기술연구
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• 제32권2호
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• pp.125-131
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• 1996

In order to investigate the relation between the environmental properties and the catch fluctuation of set net fishing grounds located in the coastal waters of Yosu, oceanographic observations on the fishing grounds were carried out by the training ship ofYosu Fisheries University from January, 1990 to September, 1992, and the data obtained were compared with the catch data from the joint market ofYosu fisheries cooperative society from 1984 to 1993. The resuItes obtained are summerized as follows : 1. The ranges of water temperature and salinity in the fishing ground was 7.0 to $27^{\circ}C.$and 26.6 to 33.2${\textperthousand}$, and water temperature increased from March to August and decreased from September to February of following year. 2. The salinity in the fishing grounds was relatively high without significant changes from November to June of the following year. From July, however, the salinity decreased to continue a low value till September and then increased. The salinity in the fishing ground was dominated mainly by the precipitation and its variation was large at the north entrance of set net fishing ground, influenced greatly by the land waters from the river of Somjin, but small in the offshore of the fishing grounds. 3. The fishes caught by the set nets were arranged in order of catch as follows; Spanish mackerel> Horse mackerel > Sardine > Anchovy > Hair tail. The catches of Anchovy and Sardine were high in April to May and those of Hair tail in June to July, but Spanish mackerel and Horse mackerel were caught for whole period of fishing. Spanish mackerel was caught most in September and least in April and their means were largest in August and smallest in June. 4. The ranges of optimum water temperature for fishing by the set nets was 13.5 to $25^{\circ}C.$, and in the ranges the catches increased with increasing temperature. The ranges of optimum salinity for fishing varied between 25.0 and 32.0${\textperthousand}$.

• 경영과학
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• 제33권3호
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• pp.31-51
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• 2016

The objective of the study is to propose the catch-up strategy of Hyundai Kia to become the globally leading company in the automobile industry. For this, we try to compare Hyundai Kia with three leading automobile companies: Toyota, VW, and GM by using the Generalized Double Diamond Model. As a result, we present three ways that Hyundai Kia can become a "First Mover." The three strategies are : 1) controlling increase of wage, raising productivity, and increasing R&D investment 2) increasing overseas investment of the small and medium sized automobile factories 3) pursuing the two tracks strategy of a public car and a prestige car more aggressively. This study is significant in the fact that it presents the catch-up strategy of Hyundai Kia in the automobile industry, of which the leaders can not be changed easily, by the Generalized Double Diamond Model approach.

• 대한토목학회논문집
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• 제29권5A호
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• pp.421-431
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• 2009

본 연구는 유도초음파를 기반으로 한 구조물 건전성 모니터링 알고리즘 검증에 관한 것이다. 유도초음파 중 램파를 기반으로 하는 능동검사시스템을 사용하였으며 본 알고리즘의 적용에 관한 기초연구로서 강판에 표면결함인 원형노치를 감지하는 실험을 수행하였다. Pitch-catch방법으로 강판 표면 원형노치에 대한 손상 탐상을 수행하여 손상전후의 $S_0$모드를 비교함으로써 손상 특성을 파악하며 손상전후 신호의 수학적 차에 의해 구한 산란램파(scatter)에 의해 손상을 평가할 수 있다. 손상전후 신호의 $S_0$모드 램파를 분석하기 위해서 연속 가보 웨이블릿 변환을 사용하여 전파시간을 구할 수 있다. 본 알고리즘은 손상모니터링 다각형과 Pitch-catch 방법을 기초로 하며 손상 위치표정값들의 평균과 표준편차에 의해 손상위치표정 및 크기를 정확히 추정 가능함이 검증되었다.

• 수산해양기술연구
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• 제41권2호
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• pp.95-100
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• 2005

In order to improve the gill nets for croaker, Miichthys miiuy which is proper to the fishermen's income ans fisheries resource management, we had studied to the net height of present gill nets (mesh size 160mm, 50 mesh in depth), experimental gill nets-I(mesh size 150mm, 68 mesh in depth) and experimental gill nets-II(mesh size 142mm, 75 mesh in depth) in wter using the gill nets design ans analysis simulation system, and then investigated and analyzed the catch efficiency of each gill nets through the field fishing experiments. The net height of emperimental gill nets-I and experimental gill nets-II in water were estimated respectively about 1.5 times and 1.3 times higher than present gill nets which the net height is about 3.5m as the results of simulation considering the current of fishing fields. Total number of croakers which were caught by the persent gill nets was 62(body length 300~1,200mm), total catch weight was 398.7kg (mean 0.6kg/sheet). Total number of croakers which were caught by the experimental gill nets- I was 68(body length 600~1,100mm), total catch weight was 391.6kg (mean 1.2kg/sheet). Total number of croakers which were caught by the experimental gill nets-II was 28(body length 400~900mm), total catch weight was 99.2kg (mean 0.3kg/sheet).

• 수산해양기술연구
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• 제32권4호
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• pp.356-362
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• 1996

본 연구는 원양 다랭이 연승 어획량을 데이터 베이스 처리하여 여러 가지 정보를 제공함으로써 조업시 경제성 있는 어장 선정에 도움을 주기 위하여 처리 프로그램을 작성하여 그 실용성을 검토해 보고자 하였다. 자료는 국립수산진흥원에서 발행한 보고서의 어획량 데이터를 이용하였고, 데이터 베이스 처리를 위한 프로그램을 설계한 후 실행해 보았다. 1)프로그램은 Quick Basic을 이용하여 작성하였고, 데이터 파일은 random 파일로 변환하여 사용하였다. 데이터 베이스 프로그램은 구획별로 조획율을 나타내는 어장도를 그리는 프로그램과 조획율을 나타내는 그래프 및 도표를 구성하는 프로그램, 데이터 통계를 나타내는 프로그램, 그리고 어장 평가 지수를 나타내는 프로그램으로 구성하였다. 2)조획율을 나타내는 어장도에서는 $5^{\circ}$간격의 해구에 조획율의 크기를 나타내는 원을 나타냄으로써 사용자가 쉽게 어획이 잘되는 해역을 판단 할 수 있었다. 3)조획율을 수치로 나타내는 도표를 통하여 원의 크기로 나타내었던 조획율 값을 좀 더 상세히 알 수 있었다. 4)시기, 저장, 어종에 따른 조획율 및 어획마리수의 그래프는 그것의 변화패턴의 규명에 도움이 되었다. 5)어장의 경제성을 비교해 볼 수 있는 시뮬레이션 기능을 이용하여 조업자가 경제성 있는 어장을 권고 받을 수 있었다.

• 정보화정책
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• 제20권4호
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• pp.71-88
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• 2013

높은 불확실성을 특징으로 하는 탈추격 단계에서는 기술위험의 가능성도 높아진다. 온라인게임은 새로운 기술 수명주기를 창조한 탈추격형 혁신의 결과물이다. 하지만 온라인 게임 중독이라는 부작용이 나타나면서 셧다운제 도입이 결정되었지만 규제 찬성과 반대집단간의 논란은 계속되고 있다. 기술위험은 사회적 맥락과 조건의 영향을 받는다. 온라인게임 중독을 초래한 사회기술적 취약성은 역설적이게도 우수한 정보화 인프라와 정보통신기기의 확산이었다. 기술위험의 원인이 된 취약성은 위험을 무시하는 발전주의 사고에 의해 더욱 강화되었다. 온라인게임 중독과 같은 기술위험을 해결하기 위해서는 우선 기술혁신의 편익과 기술위험 간의 딜레마를 인지해야 한다. 딜레마 인식의 실패는 사회적 비용을 유발하며 문제해결을 위한 노력을 어렵게 한다. 탈추격단계로의 진입에 따라 기술위험은 더욱 증가할 것이라는 점에서 이런 딜레마를 인지하고 교정책임의 적절한 부과, 해체와 재규정을 통한 딜레마의 관리, 토론장치의 설계, 사회적 책임과 경제적 성공의 연결 등을 통해 기술혁신의 책임성 확보를 위한 해결책의 모색이 필요하다.