• 한국수산과학회지
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• 제5권2호
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• pp.50-56
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• 1972

기포막을 이용한 어구 어법을 고안할 목적으로 각종 기포막으로 해산어의 반응을 관찰한 결과는 다음과 같다. 1. 기포막으로 어군의 진로 차단 및 구집이 가능했다. 2. 송기 압력 $0.160kg/cm^2$일 때, 기포 발생용 파이프 내압이 $0.087kg/cm^2$ 이상일 때는 기포막이 순조롭게 형성되었고, 송기 압력 $0.087kg/cm^2$일 때, 그 내압이 $0.018kg/cm^2$ 이하이면 침수되었다. 3. 효율적인 기포막을 형성하기 위해서는 수심 80cm, 송기 압력 $0.160kg/cm^2$에서는 구멍 크기 $\phi$ 0.3mm 간격 30cm가 가장 효과적이었다(Table 2).

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2005년도 학술발표회(1)
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• pp.471-472
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• 2005

• 한국멀티미디어학회논문지
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• 제12권1호
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• pp.130-138
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• 2009

컴퓨터와 함께 많은 시간을 보내는 현대인들 중에는 바탕화면과 화면보호기로 마음의 편안함을 주는 자연풍경이나 가상수족관 등을 설정하는 사용자들이 증가하고 있다. 가상수족관은 임의의 가상 해저환경에서 자유롭게 행동하는 여러 종류의 물고기를 만들고, 동작을 분석하여, 물고기들의 애니메이션 작업을 수행함으로써 만들어진다. 본 논문에서는 유체의 형태변화를 실시간으로 표현하는 유체 애니메이션 기법과 가상물고기의 다양한 속성에 따라 상호작용을 할 수 있는 Smart Fish기술을 이용하여 활용가치가 높은 실감형 가상수족관을 구축하는 방법을 제안했다. 본 논문에서 제안하는 방법은 다양한 해저환경을 표현하는 가상수족관, 수족관 화면 보호기, 물고기 육성 게임 등에 활용되어질 수 있다.

• 수산해양기술연구
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• 제19권1호
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• pp.17-24
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• 1983

흑, 적, 녹색의 그물무늬의 시각막을 15.0, 37.4, 62.9cm/sec의 속도로 회전시켰을 때의 송사리 Orizias latipes의 방어 Seriola quinqueradiata의 시각운동반응을 조사한 결과는 다음과 같다. 1. 시각운동반응율은 송사리가 95%, 방어가 94%였다. 2. 송사리가 잘 반응하는 시각막의 색상은 흑, 적, 녹색의 순이며, 흑색에 대한 적, 녹색의 차이는 뚜렷했으나 적색과 녹색의 차이는 뚜렷하지 않았다. 3. 방어가 잘 반응하는 시각막의 색상은 흑, 적, 녹색의 순이며, 색상에 따른 차이는 뚜렷하지 않았다. 4. 시어가 잘 반응하는 시각막의 속도는 62.9, 37.4, 15.0cm/sec의 순이며, 속도에 따른 차이는 뚜렷했다

• 한국물환경학회지
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• 제30권5호
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• pp.477-485
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• 2014

Imha Reservoir is connected to Andong Reservoir via a diversion tunnel allowing water to pass between. The diversion tunnel is equipped with screens to exclude exotic largemouth bass due to their predatory impacts on prey assemblages resulting in a degradation of species richness of local fish fauna and extinction of local fish populations in Korea. Flow pattern changes resulting from the fish screens and trash racks were investigated using a computational fluid dynamics (CFD) model. Numerical simulations showed that the decrease in the discharge capacity of the tunnel is approximately 8.6% and the headloss coefficient for fish screen at Andong intake tower was determined to be 1.5. In order not to allow the small fishes enough to pass through the wire openings enter into Imha Reservoir through tunnel, the velocity in the tunnel should be greater than 1.48 m/s which is a critical ascending velocity of the bass. This study suggests that it can keep the velocity higher enough to exclude largemouth bass when a gate opens with the condition of 1.0m difference in water stage between two reservoirs.

• 한국수산과학회지
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• 제31권6호
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• pp.908-913
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• 1998

육상수조를 이용한 해산어의 양식은 사육환경의 악화와 질병발생 등으로 인하여 생산성이 점차 저하되고 있으며, 배출수로 인해 양식장 주변연안의 환경문제점을 유발하고 있다. 따라서, 본 연구는 시스템 및 자동화 설계기술을 이용하여 유입수처리를 위한 스크린필터와 배출수 처리를 위한 드럼필터의 개발을 위한 기초단계로서 각각에 대한 개념 설계를 수행하고, 이를 바탕으로 한 실험용 모델의 제작가 운행을 수행하였다. 그 결과 현장용필터제작에 필요한 초기설계 및 상세설계에 대한 자료를 얻을 수 있었으며, PLC를 이용한 자동화는 장치의 효용성을 향상시킬 수 있었다.

• 한국인쇄학회지
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• 제22권2호
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• pp.123-138
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• 2004

The video phone tube (VPT) of monochrome CRT have utilized home door phone, fish-finder and the rear watch monitors. Phosphor screen formation is made by electrodeposition spin coating and thermal transfer methods etc. Recently, thermal transfer method was developed, as a novel method, to form the phosphor surface for mnonchrom VPT. This method have advantages of simple process, automatization, clean environment, saving raw material and saving running-cost. In this study, it was developed new phosphor of VPT, and tested about phosphor paste properties. An experimental studies of VPT as a new phosphor property and improved VPT's manufacturing process shortening and brightness. As thermal transper method is a paste processing, it is important that rheology of phosphor effects on the formation of phosphor screen. Hence this paper was studied rheology properties of phosphor paste and the formation of phosphor screen had looked most suitable condition. Experimented thermal separation properties of low calcination temperature resin and the result analyzed comparison by TGA. Also, examined calcination properties to reduce remaining binder phosphor.

• Nutrition Research and Practice
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• 제7권4호
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• pp.330-335
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• 2013

Data are limited on the association between dietary patterns and screen time among Korean adolescents. The present study identified dietary patterns of 691 adolescents, aged 13-18 years, who had participated in the Third Korean National Health and Nutrition Examination Survey (KNHANES III) and analyzed their associations with screen time. Screen time was defined as the time spent watching TV, using a computer, or playing video games was calculated as a sum of all these times. Dietary patterns and their factor scores were derived from a food frequency questionnaire using the factor analysis method. To analyze the association between dietary patterns and screen time, we conducted multiple linear regression analysis. We also performed multiple logistic regression analysis to estimate odds ratios (OR) of excessive screen time (2 hours or longer per day) and 95% confidence intervals (CI). We identified 2 dietary patterns labeled "the Korean healthy dietary pattern" and "the Western diet and fast foods pattern". The former included mixed grains, legumes, potatoes, red meat, eggs, fish, dairy products, fruits, vegetables, seaweeds, and mushrooms, whereas the latter included noodles, bread, red meat, poultry, fast foods, snack, and soft drinks. After controlling for potential confounding factors, factor scores for the Korean healthy dietary pattern were inversely associated (P-value for trend < 0.01) and those for the Western diet and fast foods pattern were positively associated with the screen time (P-value for trend < 0.01). Adolescents in the top tertile of the scores for the Korean healthy dietary pattern had a multivariable-adjusted OR [95% CI] of 0.44 (0.25-0.75) for excessive screen time compared with those in the lowest tertile. On the basis of these findings, adolescents who have excessive screen time may need to be encouraged to consume a more healthy diet.

• 약학회지
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• 제44권5호
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• pp.416-423
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• 2000

There is a growing concern that a wide variety of chemicals released into the environment can disrupt the endocrine system of fish, wildlife and humans. Endocrine disrupting chemicals (EDCs) include pesticides such as DDT lindane and atrazine, the food packaging chemicals, phthalates and bisphenol A, alkylphenol ethoxylate detergents and the chemical industry by-products, dioxins. Xenoestrogens in the environment have been argued about health risk, because of estrogen mimetic chemicals are exposed only small amounts to human. A number of in vivo and in vitro assays are now in use to assess the activity of xenoestrogens in the environment. A human breast cancer cell line (MCF-7) was used to develop in vitro screening assay for the detection of xenoestrogenic environmental pollutants. The E-SCREEN (MCF7-BUS) assay is proposed as a reliable, easy and rapid-to-perform method. To optimize and validate this method before it can be used routinely, several phenol compounds and pesticides suspected to be estrogenic were tested using I-SCREEN assay. The results showed that this method is a valuable tool for screening potential estrogen-mimicking environmental pollutants and quantitative determination of estrogeniciy.

• 수산해양기술연구
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• 제32권1호
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• pp.33-41
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• 1996

In order to obtain the most favourable classification system for fishing gears, the problems in the existing systems were investigated and a new system in which the fishing method was adopted as the criterion of classification and the kinds of fishing gears were obtained by exchanging the word method into gear in the fishing methods classified newly for eliminating the problems was established. The new system to which the actual gears are arranged is as follows ; (1)Harvesting gear \circled1Plucking gears : Clamp, Tong, Wrench, etc. \circled2Sweeping gears : Push net, Coral sweep net, etc. \circled3Dredging gears : Hand dredge net, Boat dredge net, etc. (2)Sticking gears \circled1Shot sticking gears : Spear, Sharp plummet, Harpoon, etc. \circled2Pulled sticking gears : Gaff, Comb, Rake, Hook harrow, Jerking hook, etc. \circled3Left sticking gears : Rip - hook set line. (3)Angling gears \circled1Jerky angling gears (a)Single - jerky angling gears : Hand line, Pole line, etc. (b)Multiple - jerky angling gears : squid hook. \circled2Idly angling gears (a)Set angling gears : Set long line. (b)Drifted angling gears : Drift long line, Drift vertical line, etc. \circled3Dragged angling gears : Troll line. (4)Shelter gears : Eel tube, Webfoot - octopus pot, Octopus pot, etc. (5)Attracting gears : Fishing basket. (6)Cutoff gears : Wall, Screen net, Window net, etc. (7)Guiding gears \circled1Horizontally guiding gears : Triangular set net, Elliptic set net, Rectangular set net, Fish weir, etc. \circled2Vertically guiding gears : Pound net. \circled3Deeply guiding gears : Funnel net. (8)Receiving gears \circled1Jumping - fish receiving gears : Fish - receiving scoop net, Fish - receiving raft, etc. \circled2Drifting - fish receiving gears (a)Set drifting - fish receiving gears : Bamboo screen, Pillar stow net, Long stow net, etc. (b)Movable drifting - fish receiving gears : Stow net. (9)Bagging gears \circled1Drag - bagging gears (a)Bottom - drag bagging gears : Bottom otter trawl, Bottom beam trawl, Bottom pair trawl, etc. (b)Midwater - drag gagging gears : Midwater otter trawl, Midwater pair trawl, etc. (c)Surface - drag gagging gears : Anchovy drag net. \circled2Seine - bagging gears (a)Beach - seine bagging gears : Skimming scoop net, Beach seine, etc. (b)Boat - seine bagging gears : Boat seine, Danish seine, etc. \circled3Drive - bagging gears : Drive - in dustpan net, Inner drive - in net, etc. (10)Surrounding gears \circled1Incomplete surrounding gears : Lampara net, Ring net, etc. \circled2Complete surrounding gears : Purse seine, Round haul net, etc. (11)Covering gears \circled1Drop - type covering gears : Wooden cover, Lantern net, etc. \circled2Spread - type covering gears : Cast net. (12)Lifting gears \circled1Wait - lifting gears : Scoop net, Scrape net, etc. \circled2Gatherable lifting gears : Saury lift net, Anchovy lift net, etc. (13)Adherent gears \circled1Gilling gears (a)Set gilling gears : Bottom gill net, Floating gill net. (b)Drifted gilling gears : Drift gill net. (c)Encircled gilling gears : Encircled gill net. (d)Seine - gilling gears : Seining gill net. (e)Dragged gilling gears : Dragged gill net. \circled2Tangling gears (a)Set tangling gears : Double trammel net, Triple trammel net, etc. (b)Encircled tangling gears : Encircled tangle net. (c)Dragged tangling gears : Dragged tangle net. \circled3Restrainting gears (a)Drifted restrainting gears : Pocket net(Gen - type net). (b)Dragged restrainting gears : Dragged pocket net. (14)Sucking gears : Fish pumps.