• Digital Contents
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• no.9 s.160
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• pp.58-69
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• 2006

디지털영상 산업은 21세기 미디어 & 엔터테인먼트의 대표산업으로 디지털기술과 결합하여 새로운 콘텐츠를 창출하거나 기존 아날로그 형태의 영상콘텐츠를 다시 디지털형태로 변경한것을 포함한다. 즉, 디지털기술로제작, 편집된 영상물을 온∙오프라인을 통해 유통, 서비스하는 산업군으로 정의할 수 있다. 그동안 디지털 영상은 디지털 콘텐츠 중 네트워크 용량의 문제로 디지털화가 가장 더디게 이루어졌던분야다. 그러나 유무선 브로드밴드인프라의 확산에 따른 네트워크 용량의 증대로 유통구조가 안정 되면서 향후 큰폭의 성장이 예상되고 있다.

• Proceedings of the KWS Conference
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• 2008.05a
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• pp.31-31
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• 2008

• Proceedings of the Korean Vacuum Society Conference
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• 1997.07a
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• pp.160-161
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• 1997

• Proceedings of the KGS Conference
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• 2003.05a
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• pp.185-188
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• 2003

1970년대 중반 이후부터 미국과 유럽의 주요 선진국가들에서 상당히 큰 폭의 경제 구조 재편(restructuring) 과정을 경험하고 있다는데 대부분의 학자들이 동의하고 있다. 이들 선진국들이 세계 경제에서 차지하고 있는 위상 때문에, 이는 곧바로 세계 경제 체제의 변화와 직결되었다 그리고 이러한 큰 폭의 변화 원인과 이행 과정, 그 사회적 함의 등을 밝히려는 여러 이론적 작업들이 진행된 바 있다. (중략)

• Magazine of the Korea Concrete Institute
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• v.27 no.1
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• pp.49-52
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• 2015

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.06a
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• pp.557-558
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• 2007

• Journal of the Korean Ceramic Society
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• v.36 no.11
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• pp.1139-1142
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• 1999

• Proceedings of the Mineralogical Society of Korea Conference
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• 2004.05a
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• pp.29-31
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• 2004

• Journal of Korean Society of Steel Construction
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• v.11 no.4 s.41
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• pp.397-407
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• 1999

In this paper, the fatigue safety in the suspension bridge is investigated by using nominal and variable stress, respectively. The technique on structural modeling and the fatigue evaluation using nominal stress are mainly dealt with in this paper. To make the finite element analysis model reflecting the actual structural behavior of the suspension bridge with cross frame, the parametric study is carried out. In this study, the influence of supporting condition. the difference of the results of 2- and 3-D analysis and the number of cross frames modelled in are considered. The nominal stress under the real traffic flow of the bridge is calculated by the combination of the stresses due to the unit DB-24 loading. The nominal stresses for details under consideration are compared with allowable stress ranges specified in the codes and the results are discussed.

• Journal of Korean Society of Steel Construction
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• v.9 no.2 s.31
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• pp.181-191
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• 1997

Before cables are constructed, tower of suspension bridge is behaved as a cantilever type. Buffeting occured by unsteady loading of the tower due to velocity fluctuation in the oncoming flow has a wind velocity consistent with fundamental frequency of the tower and may give rise to large response by the tower resonance. To reduce the dynamic response by buffeting, the behavior of tower with TMD(Tuned Mass Damper) has studied using finite element method in time domain. The buffeting was obtained by transforming the velocity spectrum in frequency domain to random variable in certain time domain. The most probable maximum displacement which can be occured during the time interval was obtained using peak factor. The optimum location for TMD installation and TMD specification were decided by parametric study. Also, the effect of vibration control about various wind velocity was studied by the TMD which has optimum specification and location.