• Transactions of the Korean Society of Mechanical Engineers A
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• v.20 no.2
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• pp.440-449
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• 1996

Superplastic punch forming of sheets is simulated by a finite element method to obtain the optimal punch speed and the related deformed shapes. The punch forming has an advantage of guaranteeing the desired accuracy inside a product and controlling the thichness of a deformed sheet more accurately than blow forming. The finit element code developed is associated with the contact algorithm and the control algorithm of punch speed for the optimum forming. The simulation demonstrates that the variation of the thichness in a blank sheet affects the punch speed and the final distribution of the thichness in a product. The analysis proposes that a ring-typed thichness controller is very effective in controlling the thichness of a deformed sheet appropriately.

• The Journal of the Korea Contents Association
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• v.18 no.7
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• pp.120-126
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• 2018

The film is an audiovisual art and conveys stories using various audiovisual techniques. Among the auditory elements, music has a wide variety of expressive techniques, a wide range of applications, and is sometimes used as a proprietary tool to convey stories. This study examines the musical expression technique for expressing the psychology of the character in the film by using the movie "Punch Drunk Love" as a subject of study. We study the use of music used to reveal meaning that does not appear on the screen in the film story flow, which is a tool to create the hidden meaning of the person's inner psychology and situation. This provides an example and perspective of the contrast and symbolic expression of character psychology in film music.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.7 no.4
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• pp.545-549
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• 2006

W-EDM is generally used to manufacture punches and die plates from among press mold parts. Before W-EDM was used, however, punches and die plates manufactured via mechanical processing were used to manufacture products, with the die life of the mold expiring after 2,000,000~2,300,000 products have been manufactured. When the mold manufactured through W-EDM was used, however, its service life expired only after 700,000~800,000 products have been manufactured. Since this was attributed to the deformed layer formed after using W-EDM, the surfaces before and after W-EDM was used were scanned using SEM to verify the occurrence of such layer. This study sought to come up with a method of eliminating such phenomenon.

• Journal of the Korean Society for Precision Engineering
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• v.21 no.10
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• pp.180-187
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• 2004

Die design to minimize the die wear in the cold forging process is very important as it reduce the production cost and the increase of the production rate. The quantitative estimation fur the die wear is too hard because the die wear is caused by many process variables. So, in this paper, the optimal shape of the backward extrusion punch is newly designed through the FE-analysis considering the surface expansion and Archard wear model in order to reduce the rapid wear rate that is generated for the backward extruded products exceeding the forming limit. The main shape variables of the backward extrusion punch are the flat diameter, angle, and round of the punch nose part. As the flat diameter and angle of the punch nose are larger, the surface expansion is reduced and the wear rate is decreased according to the reduction of the punch round. These results obtained through this study can be applied to the real manufacturing process.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.1
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• pp.7-12
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• 2010

In this work, optimization analysis has been accomplished to find important process factors for realization of vertical wall around holes punched by the punchless piercing process. Taguchi method was used for optimization analysis. Lemaitre damage theory, one of the ductile fracture models, was also adopted to simulate numerically formation of vertical wall. From the results of analysis the most influencing factor that affects the vertical wall has been revealed to be 'Corner Radius of Die'.

• Nuclear industry
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• v.14 no.12 s.142
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• pp.14-16
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• 1994

• Proceedings of the Korean Fiber Society Conference
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• 1989.06a
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• pp.74-74
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• 1989

• Proceedings of the Korean Nuclear Society Conference
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• 1998.10a
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• pp.218-218
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• 1998

• Journal of Information Management
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• v.5 no.1
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• pp.16-26
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• 1972

• Proceedings of the Korean Society of Computer Information Conference
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• 2013.01a
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• pp.59-60
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• 2013

본 논문에서는 Windows Phone 7 기반의 모바일 게임을 설계하고 구현한다. 이 게임은 XNA Framework를 사용하여 개발하기 때문에 상속받은 코드들을 자동으로 생성하고, 게임 개발 관련 콘텐트 리소스의 등록 및 게임 로직을 해당 메소드에 구현한다. 이 게임의 특징은 슈팅(shooting), 이미지, 랭킹시스템 등의 3개 요소를 고려하여 개발한 것이다. 다양한 물고기 캐릭터를 사용하였으며 복싱에서 연상되는 펀치를 도입하여 움직이는 물고기를 펀치로 잡아 점수를 얻는 것이다.