• 한국인쇄학회지
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• 제28권2호
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• pp.13-30
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• 2010

Existing domestic ink market had some problem because of dependence on CPP import, increasing cost, competitive price. For this reason, previous speed of research and developments are very slow. Therefore, develop the new waterborne type of non-chlorine resin, enhance the nation's position with manufacturing outstanding products. Through this thesis, the purpose is mix the polar resin and non-chlorine resin with many proportion and manufacturing better product than existing resin. Pilot production samples have run the test of adhesion, transparency, water resist and resist high pressure car washing. In conclusion, this thesis found that mix acryl Urethane resin and Non-Chlorine resin is the optimum condition.

• 한국산학기술학회논문지
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• 제16권11호
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• pp.7788-7793
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• 2015

본 연구는 최근 들어 시장의 불완전 경쟁 구조에 따른 시장 불안정 상태에 대한 우려가 가장 크게 제기되었던 시장인 곡물 교역시장에서의 연도별 불완전 경쟁의 수준과 함께 그 동태적 변화추이를 분석하였다. 기존의 시장구조 접근법에서 많이 사용되어왔던 상위 k개 국가 중심의 집중률 (Concentration Ratio: CRk)지수의 곡물 교역시장 분석상의 한계점을 명시하고, 이에 대한 대안으로 로렌츠 곡선 개념을 도입함으로써 전체 국가들의 분포적 특징을 분석하였다. 이를 바탕으로 지니 불균등 지수 (Gini Inequality Index)와 엣킨슨 불균등 지수 (Atkinson Inequality Index)를 활용한 통계적 분석을 수행하였다. 실증적 분석결과, 연도별 수출과 수입간 불균등도 차이는 분석기간 내내 통계적으로 유의수준의 양의 추정치를 나타내었다. 또한 2002-14년 기간 동안 이러한 불완전한 경쟁 상태는 2001년에 비해서 전반적으로 심화되었다. 수출 집중도가 일반적인 인식과 달리 소폭이나마 하향세를 나타내고 있음에도 불구하고 곡물 교역시장의 불완전 경쟁상태가 심화되고 있는 것은 수입의 국가별 분포가 수출의 경우 보다 현저하게 균등화되고 있기 때문으로 보인다.

• 환경영향평가
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• 제16권1호
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• pp.79-87
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• 2007

The performance of a stream water quality analysis model depends upon many factors attributed to the geological characteristics of a watershed as well as the distribution behaviors of pollutant itself on a surface of watershed. Because the model run has to import the pollution load from the watershed as a boundary condition along an interface between a stream water body and a watershed, it has been used to introduce a pollution delivery coefficient to behalf of the boundary condition of load importation. Although a nonlinear regression model (NRM) was developed to cope with the limitation of a conventional empirical way, this an up-to-date study has also a limitation that it can't be applied where the pollution load washed off (assumed at a source) is less than that delivered (observed) in a stream. The objective of this study is to identify what causes the limitation of NRM and to suggest how we can purify the process to evaluate a pollution delivery coefficient using many field observed cases. As a major result, it was found what causes the pollution load delivered to becomes bigger than that assumed at the source. In addition, the pollution load discharged to a stream water body from a specific watershed was calculated more accurately.

• 한국구조물진단유지관리공학회 논문집
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• 제14권6호
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• pp.215-219
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• 2010

본 연구에서는 제방 축조재료로 사용되는 낙동강 모래의 응력-변형 거동특성 파악을 위하여, 삼축압축시험 등을 포함한 실내시험을 실시하였고, 조립재료의 거동 표현에 적합한 개별요소방법을 적용한 수치 모델링을 실시하였다. 개별요소해석은 삼축압축시험 과정을 모델링하였으며, 이때 이용된 미시물성치는 물성치 보정과정을 통해 산정 되었다. 특정 구속압조건을 만족시키는 미시 물성치의 산정이 가능하다면, 이 미시물성치의 이용을 통해 다른 구속압조건 및 응력재하 조건에서의 거동예측에 있어, 개별요소방법이 매우 효과적으로 이용될 수 있음을 알 수 있었다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2013년도 춘계학술대회
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• pp.120-121
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• 2013

최근, 우리나라는 소득수준 향상, 교통여건 개선 등으로 여가활동 및 관광형태가 다양화되면서 육지 레저에서 해양 레저 활동이 증가하고 있다. 하지만 이런 여가활동을 수용할 수 있는 기반시설을 구축하고 있지만, 아직도 부족한 실정이다. 또한, 시설 구축 시 도입되는 기자재는 거의 전량을 수입하고 있으며 특히 마리나 구축 시 사용되는 긴장계류장치도 비슷한 상황이다. 따라서 이 논문에서는 에틸렌 프로필렌 고무와 아라미드섬유 등 재료를 이용하여 긴장계류장치를 구성하고 신뢰성 기반 강건 설계를 통해 국내 해양환경에 적합한 제품을 개발하여 해양레저문화 활성화와 산업발전에 이바지할 수 있을 거라고 생각한다.

• Tribology and Lubricants
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• 제27권2호
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• pp.65-70
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• 2011

The power servo cylinder for driving accurately turbine stop valve of an atomic power plant is necessary to do turn-over owing to a leakage of oil and a structure problem, especially, it of a power plant be in demand a high quality standard depends entirely on import. There are much problem that the AlBC be to used as a material of piston head in cylinder are caused by wear. Therefore, it is necessary to examine friction characteristics of it. In this study, wear test experiments was carried out with AlBC and SCM440, using reciprocating friction tester of pin on disk. This result was shown that the wear mechanism of AlBC on working condition is adhesive wear and the maximum temperature of infra redray thermal image of frictional surface show over 2 mm from contact surface of pin and disk.

• 한국기계가공학회지
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• 제11권1호
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• pp.95-100
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• 2012

A deck crane is installed on the deck of a ship when there is no adequate facility for loading and unloading in dock or harbor. Deck cranes in Korea have been imported from abroad, and the import-substitution effect will arise if its production can be localized. Now, it is required to suggest the structural design of a deck crane that meet the domestic criterion, considering loading condition. In this study, the structural analysis of a pedestal in the deck crane was peformed by finite element method to investigate the strength requirement. In addition, the structural design of a pedestal was suggested by using ANSYS and VisualDOC. The optimized structure of a pedestal was determined, considering lightweight design.

• Journal of Nutrition and Health
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• 제22권2호
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• pp.108-117
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• 1989

The purpose of this study was aimed to investigate the historical tends of population growth which has reflected direct effect of the ratio of food self sufficiency in Korea between the year of 1910 and 1980. Author divided the whole years between 1910 and 1980 into five different periods ; colonial period from 1910 to 1945, post colonial period from 1945 to 1950, Korean war period from 1950 to 1955, post Korean war period from 1955 to 1960, fast economic growing period 1960~1980. The ratio of national food self sufficiency has been profoundlly affected by dual factors ; rate of population group and increment of GNP which reflect the national economic development. Total food production never reached the level of population growth ratio in Korea. As a result food demand and supply has shown imbalaced condition which leads to import foods from outside contury to compensate food shortage. The increment of GNP sharply cut down the cereal consumption. The consumption of fish, milk, eggs and meat reflected to increase since 1970.

• 복식
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• 제22권
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• pp.177-192
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• 1994

The purpose of this study lies in giving help to the rational life of clothing of costmer and presenting some measures for solving problems of the fashion merchandising policy of children's ready-made clothes and the searching of feasibility of the children's ready-made clothes market in the wave of market liberalization. data for this study were obtained from interviews with managers in children's apparel company. The results are as follows : the most important change of children's ready-made clothes market is the increase in national brand license brand direct import brand and the variety of the channel of distri-bution. The most children's apparel companies showed double-edged viewpoints for these tendencies in the wave of market libera-lization. In therms of positive aspect it would give stimulus to improve product quality of fashion merchandise which were the most dis-advantageous factors in competing with oversea's brand. In terms of negative aspect it would bring the oversupply and the foreign product's penetration in domestic market. In order to improve the present condition the companies should try to establish strat-government should try to support to the small and medium sized apparel firms.

• 한국기계가공학회지
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• 제8권4호
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• pp.136-142
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• 2009

The vehicle's light-weight technology is divided into optimization of structure geometric and material. Structure geometric optimization and improvement of materials has examined to be power-train and maintenance on the severe condition. The core technology of Special vehicle's light-weight is constitute by Drop box, Axle and Final reduction gear. Technology and product of the parts is high to overseas and import dependency. We will want to examine the possibility of light-weight for the Axle Case and Drop box-connections. In this research, conventional design of excess weight will inhibit the mobility and fuel efficiency. Through the improvement of Axle material, we saw the possibility reducing weight. If you use the results of these studies, it will be available to domestic production technology and reducing weight of RV car, Dump truck, Track crain, etc.