• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2006년도 제27회 추계학술대회논문집
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• pp.371-374
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• 2006

초음속 유동장 내에서 돌출된 sharp fin형상에 의해 발생하는 충격파로 인한 열전달 특성변화 연구를 수행하였다. IR camera를 이용하여 마하 3의 유동 내에 attack angle이 $10^{\circ}$ 부터 $20^{\circ}$ 의 fin을 돌출시켜 생기는 충격파에 의한 바닥면 열전달 계수 변화를 측정하였으며, 유동장의 변화를 알아보기 보기 위해 oil flow method를 사용하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 춘계학술대회 논문집
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• pp.251-256
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• 2005

This study was performed the heat transportation ratio of three types of the following sandwich panel by KS F 2278(2003) ; Type ${\sharp}1$ : Carbon/epoxy Aluminum Honeycomb and Balsa Core Sandwich Panel(Thickness : 37mm), Type ${\sharp}2$ : Carbon/epoxy Aluminum Honeycomb Core Sandwich Panel(Thickness : 57mm), and Type ${\sharp}3$ : Carbon/epoxy Aluminum Honeycomb Core Sandwich Panel(Thickness : 37mm). Also was performed the heat transportation of next three types of the following sandwich panel by KS F2277(2002) ; Type ${\sharp}4$ and ${\sharp}5$ : 27mm, and 35mm thick-Aluminum Honeycomb Sandwich Panels, and Type ${\sharp}6$ : 27mm thick-Foaming Aluminum Sandwich Panel. It is the larger area between the skin and core, the heat transportation ratio is the higher, and when it is composed of the hybrid composite structure, good insulation property was shown.

• International Journal of Contents
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• 제5권4호
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• pp.55-61
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• 2009

In this paper, we propose a hierarchical method for segmenting a given 3D mesh, which hierarchically clusters sharp vertices of the mesh using the metric of geodesic distance among them. Sharp vertices are extracted from the mesh by analyzing convexity that reflects global geometry. As well as speeding up the computing time, the sharp vertices of this kind avoid the problem of local optima that may occur when feature points are extracted by analyzing the convexity that reflects local geometry. For obtaining more effective results, the sharp vertices are categorized according to the priority from the viewpoint of cognitive science, and the reasonable number of clusters is automatically determined by analyzing the geometric features of the mesh.

• Animal Systematics, Evolution and Diversity
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• 제18권1호
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• pp.65-74
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• 2002

한국산 바닷말반날개속 (Cafius)의 분류학적 연구를 수행하였다. 전세계에 45종이 분포하며 모두 바닷가에서 발견된다. 국내에서 처음으로 기록되는 3종 [C. algarum (Sharp), C. mimulus (Sharp), C. rufescens Sharp]을 포함하여 5종을 보고한다. 이들의 검색표. 기재, 주요형질의 그림을 제시하였다

• Kyungpook Mathematical Journal
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• 제49권3호
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• pp.583-594
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• 2009

We give an estimation for the sharp-unknotting number of certain types of torus knots, and decide it for 39 torus knots.

• Animal Systematics, Evolution and Diversity
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• 제16권1호
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• pp.65-68
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• 2000

한국산 수중다리반날개족에 대한 분류학적 재검토를 수행하였다. 본 조사를 통해 Pinophilus lewisius Sharp와 P.rufipennis Sharp가 한국미기록종으로 밝혀졌다. 한국산 수중다리반날개족은 2속 3종이 된다.

• Animal Systematics, Evolution and Diversity
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• 제15권2호
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• pp.175-181
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• 1999

한국산 투구반날개아과의 분류학적 재검토를 수행하였다. 국내에서 처음으로 보고되는 Eleusis coarctata Sharp와 Mimogonus microps(Sharp)를 포함한 6종의 검색표, 생식기 그림, 표본사진을 작성하였다.

• 환경생물
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• 제17권1호
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• pp.125-128
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• 1999

한국산 가는목도랑반날개 족의 분류학적 연구를 수행하였다. 국내에서 처음으로 보고되는 3종의 [Falagria sulcata (Paykull), Myrmecopora (Lamproxenusa ) rufescens (Sharp), and Myrmecocephalus sapida (Sharp)］검색표와 표본사진을 작성하였다.

• 대한수학회논문집
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• 제23권1호
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• pp.49-59
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• 2008

In this paper, we prove the sharp estimates for multilinear commutator related to Littlewood-Paley operator. By using the sharp estimates, we obtained the weighted $L^p$-norm inequality for the multilinear commutator for 1 < p < $\infty$.

• 대한수학회지
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• 제58권1호
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• pp.173-205
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• 2021

The spherical buildings associated with absolutely simple algebraic groups of relative rank 2 are all Moufang polygons. Tits polygons are a more general class of geometric structures that includes Moufang polygons as a special case. Dagger-sharp Tits n-gons exist only for n = 3, 4, 6 and 8. Moufang octagons were classified by Tits. We show here that there are no dagger-sharp Tits octagons that are not Moufang. As part of the proof it is shown that the same conclusion holds for a certain class of dagger-sharp Tits quadrangles.