• Journal of Advanced Marine Engineering and Technology
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• v.25 no.1
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• pp.74-86
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• 2001

With the advanced composites technologies and designs advancing faster than ever in the past then years, it has extremely important to keep up with technology by introducing new manu-facturing techniques to advance the industy even more. Specifically, the marine related indus-tries. The United States has preparing for the future by aerospace composite technology to the boat, canoe, kayak and naval vessel busin. This paper will describe one of the methods being implemented to improve quality and structural integrity to compete in the world market.

• Korean Journal of Animal Reproduction
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• v.11 no.3
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• pp.151-154
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• 1987

Of the 1153 culling sows, the most important cause was the reproductive disorders (38.6%), followed by lameness and arthritis (23.3%), metabolic diseases (9.1%), agalactia (8.9%) and advancing age (7.7%). Of 840 culled sows, 173 sows showed pathological changes in the sexual organs. The uteral changes was found in 56.1% of cases, uteral and ovarian changes in 26.6%, ovarian changes in 14.4% and vaginal changes in 2.9%.

• Journal of KIISE:Computer Systems and Theory
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• v.28 no.1_2
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• pp.58-63
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• 2001

본 논문에서는 먼저 평면상에서 블록 다각형의 교차를 계산하는 새로운 알고리즘을 제시한다. 이 알고리즘은 O'Rourke[5]의 알고리즘과는 다른 간선의 전진 규칙을 사용하여 구상으로 확장되는데 모호함이 제거되어 구상에서도 선형적인 시간에 볼록 다각형의 교차를 계산할 수 있도록 확장하였다.

• 한국디지털정책학회:학술대회논문집
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• 2004.05a
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• pp.37-49
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• 2004

According as the use of information and communication technologies and the Internet are advancing rapidly, the digital economy are no longer emerging or beginning today. They are here with ours already. We are living in a new era that the economic paradigm and structures are changed remarkably, namely the digital economy era. Tourism policy is crucial to tourism industry competitiveness by triggering changes in the digital economy. Better tourism policy in the digital economy should satisfy the tourist needs as well as create additional value for the tourism industry.

• Journal of The Korean Association For Science Education
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• v.9 no.1
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• pp.91-99
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• 1989

This stdudy intended to analysis the achievements of science education in primary, secondary and high school in Korea and Japan based on the IEA(the Internationl Association for the Evaluation of Educational Achievement) data. Advancing in school level. Korean students were inferior to Jatopanese in Science achievements, especially much more in comprehension, application than knowledge aspect. This results were roughhly discussed in relation to the environments of science edecation and the evlation systems.

• Proceedings of the KSME Conference
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• 2001.11b
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• pp.383-387
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• 2001

A mechanism of hovering flight of small insects which is called the Weis-Fogh mechanism is applied to ship propulsion. A model of the propulsion mechanism is based on a two-dimensional model of the Weis-Fogh mechanism and consists of one or two wings in a square channel. A model ship equipped with this propulsion mechanism was made, and working tests were performed in a sea. The model ship sailed very smoothly and the moving speed of the wing was small compared with the advancing speed of the ship.

• Proceedings of the KSR Conference
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• 2005.05a
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• pp.883-888
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• 2005

In modern system, electromagnetic environment are going worse with advancing electric and electronic technology, and this electromagnetic environment affect modern electric train system at the point of the safety problem. Therefore, each distributed system that is consisting electric train system have to prove there own electromagnetic compatibility through the field test. These distributed system can be considered as power supply system, signal & communication system and train system. In this study, essential field tests for electromagnetic compatibility of train system based on IEC national standard are suggested.

• Proceedings of the KSR Conference
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• 2005.05a
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• pp.942-946
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• 2005

This study investigate both the structure and characteristics of world railway market and major railway manufacturers' major business fields and their strategies to go abroad. Based on this market analysis, we study the SWOP analysis by dividing the important factors that affect railway system into strength, weakness, opportunity, threat factors, and suggest marketing strategies for advancing railway system into foreign countries.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2004.11a
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• pp.375-380
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• 2004

Restricting reconstruction, demand of remodeling has increased in deteriorated apartment. But remodeling process and steps are not taken, it is difficult to advance smoothly. Therefore, this study indicates improvement plans and understands the problems In advancing remodeling. In the result of the investigation the problems are the resident of agreements and legal approval. The goverment must complete laws about remodeling. Also, residents and an association need plans for conversation.

• Korean Journal of Computational Design and Engineering
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• v.9 no.1
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• pp.27-34
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• 2004

A tetrahedral mesh generation scheme using 3-D operators has been presented. The proposed scheme employs new 3-D operators such as rearranging and modified finishing operators in addition to the previous trimming, wedging, digging, splitting and finishing operators. These new operators have been introduced in order to increase the stability of mesh generation process. Check processings with surrounded element edges and faces have also been optimized by employing a searching algorithm. Sample meshes are constructed to demonstrate the mesh generating capability of the proposed algorithm.