• Monthly Korean Chicken
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• v.19 no.8
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• pp.121-123
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• 2013

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.3 no.3
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• pp.60-65
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• 1982

• Construction Engineering and Management
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• v.15 no.5
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• pp.19-22
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• 2014

• 발명특허
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• v.8 no.10 s.92
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• pp.58-59
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• 1983

• Proceedings of the Korea Society for Simulation Conference
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• 2003.06a
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• pp.15-18
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• 2003

Most numerical techniques such as FEM, BEM, and MOM are able to analize electromagnetic scattering problems from arbitrary shapes. Although these methods could be applied to compute electromagnetic scattering problems in frequency domain, it was limited for electrodynamic problem in time domain. In this paper, electromagnetic scattering problem from Fresnel zone plate lens are considered. Some numerical results computed by TLM are compared with Kirchhoff's approximation and PO method.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.10a
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• pp.49-50
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• 2011

Receiving sensitivity of the power gain by using Soret typed FZPL antenna should be worse when obliquely incident wave is illuminated on the FZPL. To solve this problem, elliptic Fresnel Zone Plate Lens antenna system should be introduced. Some numerical results computed by PO method are compared with Kirchhoff's approximation and measurement result.

• 주택과사람들
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• s.210
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• pp.58-61
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• 2007

화훼 산업으로 지역 경제와 일자리 창출에 활력을 불어넣는 네덜란드. 세계 최대의 꽃 수출국인 네덜란드의 화훼 산업이 지역 경제와 부동산 시장을 받치는 버팀목 역할을 하고 있다. 쾨켄호프와 알스미어를 방문해 화훼 산업의 규모와 그 영향력에 대해 살펴보았다.

• Fire Science and Engineering
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• v.13 no.4
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• pp.61-67
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• 1999

• Communications of the Korean Mathematical Society
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• v.12 no.4
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• pp.1015-1021
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• 1997

타원형 미분작용소의 이론을 이용하여 옹골 다양체에서 정의된 벡터장의 특이점에 관한 푸앵카레-호프의 이론과 평다발의 오일러-푸앵카레 특성수를 연관시키는 법을 살펴보았다.

• Geophysics and Geophysical Exploration
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• v.4 no.3
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• pp.84-88
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• 2001

For the elastic migation, the velocity errors between the initial velocity model and true velocity model seriously affect the migrated images. The assumption of an initial velocity model, thus, is one of the critical factor for the successful migration. In case of applying the layered earth model as an initial velocity model, the layer boundary having large velocity contrast can not be defined well with conventional traveltime calculation algolithms and we have the difficulties for expressing the characteristics of the real subsurface. Smooth Background Model (SBM) we have applied as an initial velocity model in our study is characterized to be linearly varying the velocity with the depth, which can express the velocity variation in the subsurface properly. Thus it can properly be applied to traveltime calculation algolithms such as Vidale's method. In this study, Kirchhoff operator for prestack migration was used and the absolute amplitude obtained by modeling was applied as a weighted value to consider the true amplitude for initial model. Initial velocity model for migration was determined by using stacking velocity and we applied this model to real data.