A-KRS는 한국원자력연구원에서 개발한 파이로프로세싱 처리된 폐기물을 처분하는 개념이다. 고준위 방사성폐기물은 파이로프로세싱에 의하여 최소화되며, 최종 발생된 고준위 방사성폐기물은 모나자이트 세라믹 폐기물 형태로 제조된다. 모나자이트 세라믹 폐기물은 처분공에 영구 처분되어 열을 발생시킨다. 발생된 열은 폐기물을 보호하는 캐니스터 및 완충재의 온도를 상승시켜 설계 기준을 초과 시킬 수 있다. 온도는 처분공 간의 거리로 조절 가능하며 한국원자력연구원에서 해석한 바 있다. 한국원자력연구원에서 해석한 경계조건은 완벽 접촉을 가정한 것이기 때문에, 최초 처분 시에 발생하는 간격에 의해 발생하는 열 저항에 의한 온도 분포는 알 수 없다. 이를 보완하기 위하여, 본 논문에서는 최초 처분 시 존재하는 간격에 의한 열 전달 해석을 수행하였다. 또한 발열체와 캐니스터 간의 공극을 추가하여 온도 분포 해석을 수행하였다. COMSOL 전산해석 소프트웨어를 이용하여 열전달 해석을 수행하였다.

This paper aims to find out the problems and improvement direction of quality control and hygiene management of fishery products in Korea. For this reason, we conducted a comparative analysis of quality control and hygiene management of fishing, landing and selling between Japan and Korea, taking mackerel as an example. Japan has established a systematic freshness management system from fishing to landing (production) areas and consumption areas. On the other hand, Korea is not fully lead-managed in the production area after fishing, and is distributed in a state where the quality of the product is deteriorated due to exposure to room temperature. Accordingly, a certain quality can not be secured at the final consumption stage, and sanitary problems occur. In order to improve the quality control and hygiene management of the fishery products, the following needs to be improved. First, we will improve the fishing level freshness management system. Second, we will improve the quality control and hygiene management of fish in the production area and wholesale stage. Third, we will promote the introduction of innovative sales and consignment sales systems at the production stage. Fourth, we will establish a consistent low temperature distribution system from the production area to the wholesale stage from a long-term perspective. Fifth, we will promote the development and education of manuals on fish quality and hygiene management.

In this study, a plate heat exchanger was developed for applying to a heat pump system using the heated effluent from a thermal power plant. Since seawater is used as a heat source and a heat sink in this heat pump system, Titanium was chosen as the heat plate material for its high corrosion resistance. One of the purposes of the study was to get an optimized distribution area in the heat plate in order that better thermal performances could be achieved through equal flow rates along the heat transfer area. It was revealed from the performance tests that the mean heat transfer rate and the overall heat transfer coefficient were enhanced by 2.9% and 7.7%, respectively, compared to those measured before the design optimization.

In aluminum brazing processes, corrosive flux, which is used in preventing oxidation, is currently raising environmental concerns because it generates many pollutants such as dioxin. The brazing process involving noncorrosive flux is known to encounter difficulties because the melting temperature of the flux is similar to that of the base material. In this study, a new brazing filler material is developed based on aluminum and non-corrosive flux composite powder. To minimize the interference of consolidation aluminum alloy powder by the flux, the flux is intentionally embedded in the aluminum alloy powder using a mechanical milling process. This study demonstrates that the morphology of the composite powder can be varied according to the mixing process, and this significantly affects the relative density and mechanical properties of the final filler samples.

This study is aimed at finding policy directions for Korean fisheries and fishing villages by using Delphi method for fisheries experts. Fisheries experts have highly evaluated the achievements of fostering aquaculture industry, seafood export support measures, and natural disasters relief and recovery arrangements among the policies promoted as so far. And it was recognized that policies such as fishery resources management, creation and recovery of fishery resources, improvement hygiene and seafood safety, and provision young fishermen with training and capacity building will be important. Future megatrends, for example changes in food consumption pattern, climate change, and demographic structure changes are expected to have a significant impact on fisheries and fishing villages. The Delphi survey indicates that the most important policy objective is to secure a stable fisheries production. In other words, fisheries policy in the future should be aimed at suppling sustainable seafood for popular consumption. Finding strategies and action plans that can achieve this goal will be an important policy issue. In conclusion, it is necessary that a number of fundamental researches carry out in Korea, which can lead to finding out a multifunctionality of fisheries and fishing village. In addition, it is important to expand the scope of fisheries policy, which can consider not only the fisheries producers but also seafood consumer’s and young fishermen perspectives. Furthermore, it recommends that fishery policy needs to include fishery related industry as well as application of 4th industrial revolution technology to fishery

An icing phenomenon of wind turbine blade are caused by wind speed, air temperature, liquid water content, droplet size, and so on. In this study, the analyses were carried out at a liquid water content of 0.20g/㎥, droplet size of 25 um, wind speed of 11.4m/s and air temperatures of -15, -10, -5℃ using NREL 5MW wind turbine. The software uses FENSAP-ICE's CFD Flow Solver, Drop 3D and ICE 3D. The analysis of icing shape and mass with temperatures according to air foil was derived, and the required heat quantity for de-icing was calculated at NACA 64618 airfoil for air temperature of -15℃. Power curves with wind velocities are suggested for economical analysis.

전극 구성에 따른 고효율 전해정련공정의 일반적인 모델을 구축하기 위하여, 상미분방정식 인터페이스를 갖는 COMSOL Multiphysics V5.3 전착 모듈을 사용하여 수치해석을 실시하였다. 구축된 모델은 한국원자력연구원에서 제작한 실험실 규 모 (1kg 우라늄/day 규모) 다중배열전극 전해정련장치를 사용해 전극 간 거리, 전극 배열을 변수로 하여 실시한 실험의 전 류밀도-전위 곡선과 비교하였다. 공정온도는 500℃이다. 용융염은 3wt% UCl3가 포함된 LiCl-KCl 공융염을 사용하였다. 검 증된 모델을 이용하여 전류밀도-셀전위 곡선을 계산한 결과 전극 간 거리가 가까울수록, 전극 배열은 양극/음극 면적비가 증 가할수록 셀 전위가 낮아져 전해정련장치의 우라늄 처리효율을 향상시킬 수 있다는 것을 확인하였다. 이러한 접근은 고출력 사용후핵연료 전해정련기의 안전설계를 위한 데이터베이스 구축에 유용할 것이다.

In this experiment, we determined the effect of curcumin supplementation in freezing buffer for miniature pig sperm cryopreservation. Each ejaculate was diluted with modified Modena B extender and mixed with lactose-egg yolk (LEY extender, 80% v/v lactose solution [310 mM], 20% v/v egg yolk, and100 μg/mL kanamycin sulfate) and LEY-glycerol Orvus ES Paste (LEYGO, 89.5% v/v LEY, 5% v/v glycerol, 1.5% v/v Orvus ES Paste), 100 mM trehalose supplemented with 0, 10, 50, 100, and 500 μM of curcumin from turmeric, respectively. Following equilibration, the 0.5 mL French straws were frozen and plunged into LN2 tank for 7 days at least. Sperm parameter and oxidative byproducts were determined by the computer assisted sperm motility analysis (CASA) and fluorescence-activated cell sorting (FACS) as compared with each groups.Supplementation of curcumin had no effect on sperm motility, progressive motility and curvilinear velocity. However, average-path velocity and straight-line velocity were significantly higher in 10 μM curcumin group (100.9±8.8 μm/s, 61.7±2.9 μm/s, respectively) than control group (77.8±3.9 μm/s, 46.4±3.0 μm/s, respectively) (p < 0.05). In addition, the level of the O2 radical and H2O2 were comparatively decreased in curcumin groups by evaluation of ethidium and DCF fluorescence. According to the results, curcumin can improve sperm kinetic variables and alleviate ROS induced cryoinjury to pig sperm.

Dans cette étude, les commentaires des professeurs sur la capacité de communication et la capacité de traduction ont été conçus et formulés en utilisant une activité paraphrasante basée sur la théorie interprétative de la traduction dans une classe de traduction au niveau universitaire. La réaction des élèves lors du cours de traduction a ensuite été analysée . Le but de cette étude était d'étudier la valeur éducative de ce type de commentaires des professeurs et de trouver la méthode la plus efficace de rétroaction des professeurs appropriée pour les étudiants qui apprennent la traduction du français vers le coréen. Les principaux résultats des analyses de commentaires des professeurs sont résumés comme suit: (1) Certaines des tâches qui semblaient difficiles pour les élèves ont été classées en éléments de capacité de traduction et de capacité de communication. Les commentaires du professeur, organisés en capacité de traduction et de communication par la méthode d'enseignement par la paraphrase en fonction des difficultés rencontrées par les élèves dans leurs tâches, ont généralement une influence positive sur la capacité de traduction des étudiants, et en particulier la capacité linguistique des élèves. (2) Comme une méthode répétitive d'apprentissage des synonymes, les commentaires répétés des professeurs par la paraphrase ont été trouvés pour aider à améliorer la capacité linguistique des élèves. (3) Il était également possible de voir le potentiel de la compréhension par les élèves des stratégies d'apprentissage autonomes basées sur la méta-cognition en termes de lecture, de traduction et d’écriture.

The purpose of this study is to identify problems and suggest improvements of estimating procedures and item of fisheries supply-demand statistics served as a basis for the fisheries supply-demand policies. Korea Rural Economic Institute(KREI) and Ministry of Oceans and Fisheries(MOF) respectively publish the fisheries supply-demand statistics. But the reliability of data is low as the statistics of these two organizations are limited and show discrepancy in the numbers. It is therefore difficult to use them as the basic data for policies. Also, an accurate data aggregation is difficult due to following problems in the items of statistics. 1) Problems in estimating route sales and non-route sales of production, 2) adequacy of fishery product yield rate compared to raw material in the fisheries import/export sector, 3) selection of target companies for understand stocks and survey scope of fish species, 4) applying‘0’to non-edible product demand etc. In order to develop the fisheries industry as a future growth industry, it is necessary to establish the accurate fisheries supply-demand policy as the instability of fisheries supply and demand is increasing. To do this, statistical reliability has to be improved. The improvements proposed in this study should be implemented considering urgency. First of all, an exhaustive analysis of stock statistics and conversion rates of raw material yield in the fisheries import/export sector should be conducted. In the medium term and the long term, transferring production statistics to MOF and surveys on the use demand of non-food product and the level of reduced and discarded seafood products should be carried out in consecutive order.

처녀생식은 관심 개체의 생식세포에서 반수체 유전물질을 이배체로 복원시킴으로써, 요구되는 특정형질을 다음세대에 거의 소실 없이 전달할 수 있다. 쥐의 처녀생식을 통한 난모세포의 활성화 는, 앞선 논문 들에서 알려진 바, strontium에 가장 유의적으로 그 비율이 높다. 그러나 기존의 strontium의 유의성을 살펴보고자 했던 실험의 경우는, 배양될 배아들을 단일 단계만의 배지에서 실험을 진행한 사례가 다수이다. 따라서, 본 실험은 활성화된 쥐의 parthenotes의 배반포까지의 발 달률 및 생존률을 높이기 위해, R1ECM배지에서 KSOM배지로의 두 단계 배양 체계를 기반으로 진행하였다. 또한, 이미 보고된 glucose의 농도에 따른 배아의 발달률 변화와 상피세포 성장인자의 첨가로 인한 발달률 증가가, 단일 단계 배양이 아닌 두 단계 배양 체계에서도 유의적 결과를 보이 는가를 살펴보았다. R1ECM배지에서 One cell embryo 까지의 배양을 진행했으며, 이후 3그룹으로 나누어, 각각 KSOM만을, modified KSOM (high glucose)을, KSOM+EGF을 사용하여 각각 2, 4, 8-cell과 배반포까지의 발달률을 비교하였다. 각 그룹은 통제집단 (KSOM으로의 배지 교체를 하지 않음.)과 비교했을 때, 모두 유의적 발달률을 보였다. 특히, KSOM+EGF 집단이 가장 특기할 만한 결과치를 보였다. 다만, glucose의 농도를 달리한 KSOM 집단은, KSOM만을 사용한 집단과 큰 차 이를 보이지는 못하였다. KSOM 배지 배양에서 glucose의 농도 변화는 오히려 배지의 전체 농도의 지나친 증가를 야기한 것처럼 보였는데, 이는 좀 더 세밀한 조절을 해야 할 필요가 있을 것이다. 실험에 이용된 암컷 쥐의 난모세포는 hCG 주입 후 16시간이 지난 시점에서 채취되었는데, 본 실 험과 hCG 주입 이후의 경과된 시간과의 연관성은 향후의 추가적 연구가 필요해 보인다. 쥐 난 모 세포의 처녀생식 활성화를 위해 cytochalasin B와 cycloheximide가 첨가된 1.25 mM의 strontium을 사 용했는데, 해당 시약에서 cytochalasin B의 작용을 통해 세포 분열의 진행 단계에서 arrest 현상을 피할 수 있었던 것으로 사료된다.

In this paper, we take into account topology optimization problems considering spatial randomness in the material property of elastic modulus. Based on 88 lines MATLAB Code, Monte Carlo analysis has been performed for MBB(messerschmidt-bo lkow-blohm) model using 5,000 random sample fields which are generated by using the spectral representation scheme. The random elastic modulus is assumed to be Gaussian in the spatial domain of the structure. The variability of the volume fraction of the material, which affects the optimum topology of the given problem, is given in terms of correlation distance of the random material. When the correlation distance is small, the randomness in the topology is high and vice versa. As the correlation distance increases, the variability of the volume fraction of the material decreases, which comply with the feature of the linear static analysis. As a consequence, it is suggested that the randomness in the material property is need to be considered in the topology optimization.

동절기 엽수 관리는 딸기 재배 농가마다 상이한데 촉성 작형으로 ‘설향’을 토경 재배할 때 동절기 엽수 조절이 딸기 수량 및 과실 당도에 미치는 영향을 2작기 (2013-2014년 및 2014-2015년)에 걸쳐 검토하였다. 12월 상순에서 2월 하순 사이에 엽수를 성엽을 기준으로 6매 및 9매를 남기고 주기적으로 적엽하거나 노화되어 황화된 엽만 제거한 무적엽 처리구를 두어 실험하였다. 2014-2015년 작기에서 엽수를 6매 및 9매를 남기고 적엽한 처리구와 비교하여 무적엽 처리구에서 2월 하순까지의 조기 상품과 수량 및 상품과 총수량이 유의하게 높았다. 가용성 고형물 함량은 동절기 엽수 조절에 따라 1-3월 사이에 처리구간에 유의한 차이를 보였는데, 무적엽 처리구에서 가장 높았으며 수확 전기간 평균 12oBrix 내외로 안정적이었다. 따라서, 동절기에는 부족한 일조량과 단일 조건으로 충분한 동화산물의 생산이 어렵기 때문에, 노화엽과 이병엽을 제외하고 최소한으로 적엽하여 관리하는 것이 딸기 과실 수량과 품질을 향상시킬 수 있을 것을 판단된다.

The influence of NiCrAlY bond coating on the adhesion properties of an Fe thermal coating sprayed on an Al substrate was investigated. By applying a bond coat, an adhesion strength of 21MPa was obtained, which was higher than the 15.5MPa strength of the coating without the bond coat. Formation of cracks at the interface of the bond coat and the Al substrate was suppressed by applying the bond coat. Microstructural analysis of the coating interface using EBSD and TEM indicated that the dominant bonding mechanism was mechanical interlocking. Mechanical interlocking without crack defects in the coating interface may improve the adhesion strength of the coating. In conclusion, the use of an NiCrAlY bond coat is an effective method of improving the adhesion properties of thermal sprayed Fe coatings on Al substrates.

딸기의 내저온성 품종육성을 위한 우수 교배친 선발을 위해‘다홍’,‘감홍’,‘매향’,‘설향’을 자방친 으로 이용하고‘다홍’,‘감홍’,‘매향’,‘설향’,‘수경’,‘선홍’,‘원교3111호’등을 화분친으로 하여 24 조합을 작성하고 조합능력 검정을 실시하였다. 그 결과, 자방친을‘다홍’으로 하였을 경우에는 전체조 합에서 과중이 작아지는 경향이 있었고,‘감홍’은 생존율이 낮아 두 품종은 자방친으로 적합하지 않은 것으로 나타났다. 화분친에 있어서도‘선홍’을 화분친으로 이용한 경우 경도가 낮아지는 경향이 있었 고,‘수경’은 기형과가 다소 발생하는 경향이 있어 화분친으로 적합하지 않았다. 그러나‘매향’과‘설 향’을 자방친으로 이용할 경우 발아율과 생존율이 상대적으로 높았고, 과실품질이 우수하고 수량성도 높은 것으로 나타났다. 따라서‘매향’과‘설향’이 자방친으로 우수하였고, 화분친으로는‘매향’,‘설 향’,‘원교3111호’등이 우수하였다. 특히,‘매향’ב설향’,‘설향’ב매향’,‘설향’ב원교3111호’조합 은 당도, 과실크기, 경도, 수량성 측면에서 우수성이 인정되기 때문에 내저온성 교배조합으로 적합하다 고 판단된다.

This research examined the transformations of the fisheries relations between Japan and Russia since the establishment of the Exclusive Economic Zone (EEZ) system. The author reviewed the transformations with investigation on mutual fishing access to EEZ including salmon & trout catches. The Japan-Russia fisheries relations have evolved through multiple developmental stages, which include mutual fishing access to EEZ, the reductions of a fishing quota to balance catches of the nations, provision of financial and technical support, and a payment system of EEZ fishing access fee. The Japanese salmon industry also has done similar practices, continuing to catch salmon and trout in the Russian EEZ. Additionally, Japan and Russia have attempted to develop joint fisheries projects and to assure fishing operation safety around Kuril Islands. The case of Japan-Russia mutual fishing access shows that a country that has authority over crucial fisheries resources tends to establish specific conditions of mutual fishing access so that it maximizes its national interest. Thus, this case gives us implication what could be future directions of Korea-China-Japan multinational fishing access. The principle of same number of fishing vessels and quantities of catches has worked in existing mutual fishing access to EEZ among Korea, China, and Japan. However, it is expected that a nation that is endowed with abundant fisheries resources would limit counterpart’s fishing access to its EEZ. Therefore, Korean fisheries administration should prepare for all possible situations like a dramatic cut in fishing quota and the termination of fishing access. International fisheries cooperation and payment of fishing access could be viable options for such a situation.

This research examined a task to foster into the export industry, through analyzing the competitiveness of the ornamental fish industry and identifying the position of Korea’s ornamental industry in the world. Ornamental fish in Korea holds the world’s leading aquaculture technology, but products are limited to a few species, lacking competitive products. In the case of aquarium supplies, the Korean technology level is receiving relatively positive marks in the global market, but ornamental fish products are lagging behind the global trend. In other words, Korea’s ornamental fish industry has the overall technical foundation, but lacks differentiation in the global market. Meanwhile, Korea’s market share of world trade market in fishery products is minimal. Growth was also analyzed not high compared to other countries. Various trade competitiveness index results rated very low in competitiveness, but it is hard to compare Korea with other countries which have already built a strong foundation in the ornamental fish industry. Therefore, for the mid to long term Korea should adapt a“Choice and concentration”strategy and focus on the production of ornamental fish and aquarium supplies, which will enable Korea to become differentiated in the global market and capture the world exports.