The aging fishery training vessels from the past have mostly been decommissioned, and many universities are introducing state-of-the-art large fishery training vessels. The purpose of these training vessels is to train marine professionals and above all, safety to prevent marine accidents should be of utmost priority as many students embark on the vessel. This study estimated the impact of the hydrodynamic interaction forces acting on the model vessel (fishery training vessel) from the bank when the vessel pass near the semi-circle bank wall in various conditions through the numerical calculation, especially concerning maneuvering motions of the vessel. For estimation, variables were mainly set as the size of the semi-circle shape, the lateral distance between the bank and the model vessel, and the depth near the bank. As a result, it was estimated that, in order for the model vessel to safely pass the semi-circle bank wall at a speed of 4 knots, the water depth to the vessel draft ratio should be 1.5 or more (approximately 8 m of water depth), and the lateral distance from the semi-circle bank wall should be 0.4 times the model vessel’s length    or more (a distance of 34 m or more). Under these conditions, it was expected that the model vessel would pass without significantly being affected by the bank wall.

Gangliosides are glycolipids in which oligosaccharide is combined with sialic acids. Our previous studies have suggested an interplay between ganglioside GD1a/GT1b and meiotic maturation capacity in porcine oocyte maturation. Furthermore, ganglioside GD1a and GT1b are known for its antioxidant activity, but it is still unclear whether possible antioxidant role of GD1a and GT1b is involved in porcine embryos development competence during in vitro culture (IVC). Here, the effects of ganglioside GD1a and GT1b on the embryonic developmental competence during in vitro culture of porcine were investigated. The effects of ganglioside GD1a and GT1b on the expression of ST3GAL2 were confirmed during embryos development (2-cell, 4-cell, 8-cell and blastocyst) using immunofluorescent staining (IF). As a result, the fluorescent expression of ST3GAl2 was higher in embryos at 4-8 cells stage than blastocysts. Blastocyst development rate significantly increased in only 0.1 μM GD1a and GT1b treated groups compared with control group. To investigate the cellular apoptosis, we analyzed TUNEL assay. In case of only 0.1 μM GD1a and GT1b treated groups, the total number of cells in blastocyst compared with control group, but there was no significant difference in the rate of apoptotic cells. We identified the intracellular ROS levels using DCF-DA staining. According to the result, ROS production significantly decreased in blastocysts derived from the 0.1 μM GD1a and GT1b treated groups. These results suggest that ganglioside GD1a and GT1b improve the developmental competence of porcine embryos via reduction of intracellular ROS during preimplantation stage.

지속적인 선박 대형화와 지구온난화로 인한 해수면 상승으로 항만 내 위험이 증가함에 따라 부두의 마루높이 기준은 상향되는 것이 미래지향적이다. 본 연구에서는 선박 대형화로 인해 풍압면적이 커지므로 마루높이 상향이 필요할 것으로 판단되는 크루즈선과 컨테이너선을 선정하고, 마루높이 상승에 따른 대상부두를 모델링하여 계류 및 동요 안전성을 평가하였다. GT 10만톤급 크루즈선은 풍향이 접안 현 선수방향 45°일 때 풍속 30 kts, H₁조건에서 계류삭 허용파단력이 초과하였다. 또한 부두와 계류삭의 앙각은 마루높이 H₂에서 권고값을 초과하는 것으로 분석되어 최저 마루높이 기준을 H₃로 조정할 필요가 있는 것으로 분석되었다. DWT 10만톤급 컨테이너선은 풍향이 접안현 정횡일 때 마루높이 H₁에서 Sway 운동의 한계값을 초과하는 것으로 분석되어 최저 마루높이 기준을 H₂로 조정할 필요 있는 것으로 분석되었다. 본 연구 결과는 선박 특성을 반영한 부두 마루높이 기준을 제안하기 위한 기초 자료로 활용될 수 있을 것으로 기대된다.

Ganglioside GT1b, glycosphigolipids with three sialic acid, is known to play an important role in signal transduction such as epidermal growth factor receptor (EGFR). EGF is also known to induce resumption of meiosis and cumulus cells expansion during porcine oocyte maturation. Therefore, this study was conducted to evaluate the effects of ganglioside GT1b on resumption of meiosis and cumulus cells expansion in porcine oocyte maturation. First, porcine cumulus-oocyte complexes were cultured in NCSU-23 medium supplemented with GT1b (0, 1, 2 and 4 μM) at 44 h. We observed that the proportion of the metaphase II (M II) stage was significantly increased in the 2 μM GT1b (78.0 ± 2.3) treated group than in the other groups. Furthermore, expression of cumulus cells expansion factor genes (Has2, TNFAIP6, Ptx3) were significantly increased in the 2 μM GT1b treated group than in the other groups. Next, we investigated the meiotic maturation and the expressions of cumulus cells expansion factor genes after GT1b and/or EGF treatment. The proportion of the M II stage was significantly higher in the GT1b+EGF (90.1 ± 2.3) treated group than in the other groups. Moreover, expressions of cumulus cells expansion factor genes were significantly increased in the GT1b+EGF treated group than in the control group. After in vitro fertilization, fertilization rate, preimplantation development competence and quality of blastocyst were improved in oocytes derived from GT1b+EGF treated group. Taken together, these results suggest that exogenous ganglioside GT1b improving the developmental competence of porcine embryos via increase of resumption of meiosis and cumulus cells expansion during in vitro maturation of porcine oocytes.

공정육묘장과 양액재배 농장에서 재배 후 폐기되 는 폐배지를 재활용하기 위하여 실험을 수행하였다. 공정육묘 폐배지와 양액재배 폐코이어를펄라이트와 입상암면과 다양한 부피비로 혼합한 배지에 페츄니 아(Petunia hybrida) ‘Madness Rose’와 팬지(Viola tricolor) ‘Magestic GT’의 플러그묘를 각각 육묘 45 일에 지름 10cm의 플라스틱분에 이식하여 재배하였다. 공정육묘 폐배지와 양액재배 폐코이어의 일부는 120oC, 1.5기압하에서 30분 동안 증기소독 하였다. 폐 배지 보다 폐코이어를 펄라이트와 입상암면을 조합한 처리에서 생육이 좋았다. 팬지의 경우에는 소독하지 않 은 공정육묘 폐배지 처리에서는 생육이 저조하고 식물 이 고사하였다. 따라서 폐배지를 재활용 할 때는 소독 이 전제되어야 할 것이다. 이 실험의 결과 공정육묘 폐배지와 양액재배에 사용한 코이어의 배지로서의 재 활용 가능성이 입증 되었다.

폐펄라이트와 폐유리를 가공하여 입상화한 cellular glass foam(CGF)을 각각 입상암면과 피트모스를 혼합한 배지에서 매트저면관수한 Viola×wittrockiana 'Majestic GT Scarlet Shadow'를 재배하여 개화와 생육을 조사하였다. 엽수, 분지수, 지상부 생체중과 건물중, 엽면적과 총엽록소 함량은 폐펄라이트+입상암면+피트모스 (25:50:25, v/v/v) 혼합배지에서 가장 좋았으며, 초장과 최대근장은 CGF+피트모스(25:75, v/v) 혼합배지에서 가장 좋았다. 대조구인 폐펄라이트+피트모스(25:75, v/v) 혼합배지와 비교하여 CGF+피트모스(25:75, v/v)에서의 초장, 엽수, 근장, 총엽록소 함량, 지상부와 지하부의 생체중과 건물중이 더 켰다. 그러나 폐펄라이트+입상암면(25:75, v/v) 혼합배지와 비교하여 CGF+입상암면(25:75, v/v)에서의 생육은 매우 저조하였다.

Facility layout for enterprise's competitive power strengthening and construction of offensive manufacture line and direction presentation for design of production management system that is new by operation improvement according to S company. In enterprise in JIT(Just in Time) system of leading persons affecting in productions among a lot of habitat factor analyze. It is that through equipment Layout among those factors enterprise my problem improve and serves enterprise's absolute ability cultivation. Even if it is JIT production main point that affect to apply the modular production to productive system among at equipment Layout, lot size, bottleneck session etc. worker's multi-function anger, change of demand factor and productive capacity add. 'S' Through enterprise's example, I wish to establish Korean medium and small enterprises' manufacturing industry style equipment Layout model by taken place effect interpretation.

Many production management systems for increasing productivity, minimizing inventory, keeping due dates and maximizing use of resources have been proposed, and GT, MRP and JIT are frequently used among these systems. The three systems have merits and demerits through comparing with each other. Because each system has mutual dependence, a hybrid production system is necessary for using their merits maximally. In this study, a hybrid production system is designed by combining GT, MRP and JIT, which is suitable in the domestic production system.

Many production management systems for increasing productivity, minimizing inventory, keeping due dates and maximizing use of resources have been proposed, and GT, MRP and JIT are frequently used among these systems. The three systems have merits and demerits through comparing with each other. Because each system has mutual dependence, a hybrid production system Is necessary for using their merits maximally. In this study, a hybrid production system is designed by combining GT, MRP and JIT, which is suitable in the domestic production system and it is presented as followings. -. Basic research works for G7, MRP and JIT. -. Comparison and analysis are carried out for each system.- . The hybrid production system is designed. -. The hybrid production system is developed.

To develope a domestic machinery industry, international competition through reducing cost by increasing productivity is as important as evolving technology and increasing quality. In this study, we have studied in application of GT technology. GT is a skill that acquires high productivity using part's resemblance for multi part and small size production like mass production. We have classified group, such as design, layout and the others, to be applied systematically. The design group includes retrieval for drawings and study for GT design. The layout group includes GT layout, analysis of production process and study for composition method. And others include scheduling, standardization and standard process.

The results obtained by survey on 599 respondents of different age groups for preference of 84 prepared foods were subjected to statistical principal component analysis, factor analysis, analysis of variance, scheffe verification, and discriminant analysis so as to find a structure of preference for foods. The results may be summarized as follows: 1. The results of the factor analysis indicate that 84 prepared food items may be classified into 3 groups and that by knowing an indvidual's preference to one prepared food, one can presume his preference to the others in the same group without carrying out actual test. 2. The results from an analysis of variance showed that most of primary school children extremely liked snacks, seniors liked Korean cooking, primary school children and collegians had weaknesses for western cookings while kindergarden children and adults over 50 years old disliked them.

Enhancing yield has been a major challenge of agriculture. In rice, tiller number is one of the important biomass and yield components. A maize mutant grassy tillers1 (gt1) increases lateral branches in maize. The GT1 gene encodes a class I homeodomain leucine zipper (HD-Zip) protein. In maize, the gt1 expression is induced by shading and is dependent on the activity of teosinte branched1 (tb1), a major domestication locus controlling tillering and lateral branching. To estimate the biological role and agricultural utility of gt1 in rice, rice homologue (OsGT1) has been isolated and its overexpressors and RNAi lines were generated. Field data showed that OsGT1 overexpressors reduced tillers and panicles while RNAi lines increased them, compared to wild type. Shade signal is an important factor in determining lateral branching. To understand the relationship between OsGT1 and shade avoidance, plants have been grown under 50% shading in the field. Also, double genetic combinations with phytochrome mutants (phyA, B, and C) are being examining for tillering phenotype. These ongoing researches will provide insights in determining the action of OsGT1 on branching and shade avoidance in rice.

본 논문은 디지털 영상매체의 발달함에 따라 주목받고 있는 3차원 입체영상 제작방법에 있어서 가장 먼저 개발되어진 애너글리프 방식을 이용하여 마야 프로그램에서 제작되어진 3D 입체영상 애니메이션 '이그드라씰'을 분석하였다. 이 작품에서 사용한 애너글리프 방식은 3D 입체영상을 비교적 쉽게 제작할 수 있으며 색상의 차이를 이용하여 분리된 영상을 통해 입체감을 효과적으로 표현할 수 있었다. 또한 시지각 이론을 적용한 공간연출은 작품에서의 필요한 거리감과 깊이감 그리고 속도감을 표현하는데 효과적 이였다.