• The KIPS Transactions:PartA
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• v.9A no.1
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• pp.99-104
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• 2002

The goal of this paper is to generalize the concept of Bezier curves and surfaces defined on the vector space $R_n$ to Lie groups, which is a new generation method of curves (called Bezier curves) on Lie groups. The defined Bezier curves and surfaces are alsways smooth because of the properties of Lie groups. We apply this method to smooth motion interpolation or smooth trajectory generation for moving rigid body in space.

• Journal of Physiology & Pathology in Korean Medicine
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• v.20 no.6
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• pp.1629-1635
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• 2006

The migration of vascular smooth muscle cells (VSMC) and the production of matrix metallopreteinases-9 (MMP-9) may play a key role in the development of atherosclerosis. In this study, we have more extensively investigated the inhibitory effect of UR on MMP-9 activity and TNF-${\alpha}$ induced human aortic smooth muscle cells (HASMC) migration. The result from gelatin zymography showed that UR inhibited MMP-9 activity in a dose-dependent manner (IC50 = 55 g/ml). In addition, UR strongly inhibited the migration of HASMC induced by TNF-treatment (IC50 = 125 g/ml), although it has very low cytotoxic effect on HASMC (IC50 > 500 g/ml). These results suggest that UR is a potential anti-atherosclerotic agent through inhibition of MMP-9 activity and VSMC migration.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04d
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• pp.250-252
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• 2003

많은 기업들이 사설망과 같은 수준의 기능을 제공하면서 사설망에 비해 매우 경제적인 VPN 을 기업 네트웍의 인프라로 채택하고 있다. VPN 을 구성하는데 있어 우수한 005 나 보안 기능을 제공하는 MPLS VPN 이 VPN 을 구성하기 위한 최적의 방법으로 간주되고 있다. 또한 모바일 컴퓨팅의 보편화와 이동 환경에서의 인터넷 서비스에 대한 요구의 증가로 VPN 에서도 이동 인터넷 서비스를 제공할 필요가 있게 되었다. 본 논문에서는 IP 의 이동성을 제공하는 Mobile IP 와 MPLS VPN 을 결합하여 VPN 이용자에게 이동 인터넷 서비스를 제공하는 방법을 설명하고 이동 노드의 핸드오프시 발생하는 패킷 손실을 최소하기 위해 Smooth handoff를 지원하는 MPLS VPN을 Linux에서 구현하고 테스트를 수행하였다.

• Proceedings of the KACD Conference
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• 2003.11a
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• pp.617-617
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• 2003

I. Objectives This study was done to evaluate whether or not there are any differences in microleakage of the class 5 composite restoration that were filled at the smooth surface and the proximal surface respectively. In addition any differences between small and large-sized restoration were also studied. II. Materials and Methods Total sixty-four class 5 resin restorations, sixteen per group, were made in the permanent teeth. Two-sized cavities, small ($2{\;}{\times}{\;}2{\;}{\times}{\;}1.5{\;}mm$) and large ($4{\;}{\times}{\;}2{\;}{\times}{\;}1.5{\;}mm$), were filled at the smooth surface and the proximal surface each.(omitted)

• International Journal of Air-Conditioning and Refrigeration
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• v.15 no.2
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• pp.47-53
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• 2007

Laminar heat transfer experiments were conducted in flat extruded aluminum tubes. Three different flat tubes-two with smooth inner channel, one with micro-finned inner channel-were tested. Smooth tube data were in reasonable agreement with the predictions by simplified theoretical models. The heat transfer coefficients of the micro-fin tube were significantly smaller than those of the smooth tube. The reason was attributed to the decelerating flow in the inter-fin region. Heat transfer correlations were developed from the data.

• Smart Structures and Systems
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• v.23 no.2
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• pp.185-194
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• 2019

The probabilistic tsunami risk assessment of large coastal areas is challenging because the inland propagation of a tsunami wave requires an accurate numerical model that takes into account the interaction between the ground, the infrastructures, and the wave itself. Classic mesh-based methods face many challenges in the propagation of a tsunami wave inland due to their ever-moving boundary conditions. In alternative, mesh-less based methods can be used, but they require too much computational power in the far-field. This study proposes a hybrid approach. A mesh-based method propagates the tsunami wave from the far-field to the near-field, where the influence of the sea floor is negligible, and a mesh-less based method, smooth particle hydrodynamic, propagates the wave onto the coast and inland, and takes into account the wave structure interaction. Nowadays, this can be done because the advent of general purpose GPUs made mesh-less methods computationally affordable. The method is used to simulate the inland propagation of the 2004 Indian Ocean tsunami off the coast of Indonesia.

• Journal of the Korean Mathematical Society
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• v.56 no.1
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• pp.239-263
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• 2019

The $Calder{\acute{o}}n$-Zygmund type estimate is proved for elliptic obstacle problems in bounded non-smooth domains. The problems are related to divergence form nonlinear elliptic equation with measurable nonlinearities. Precisely, nonlinearity $a({\xi},x_1,x^{\prime})$ is assumed to be only measurable in one spatial variable $x_1$ and has locally small BMO semi-norm in the other spatial variables x', uniformly in ${\xi}$ variable. Regarding non-smooth domains, we assume that the boundaries are locally flat in the sense of Reifenberg. We also investigate global regularity in the settings of weighted Orlicz spaces for the weak solutions to the problems considered here.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.86-88
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• 2014

Naive Bayes (NB) assumption has some harmful effects in classification to the real world data. To relax this assumption, we now propose approach called Naive Bayes Mutual Information Attribute Weighting with Smooth Kernel Density Estimation (NBMIKDE) that combine the smooth kernel for attribute and attribute weighting method based on mutual information measure.

• Proceedings of the PSK Conference
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• 2003.04a
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• pp.117.1-117.1
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• 2003

We investigated whether experimental esophagitis and IL-1$\beta$ could induce the activation of MAP kinases in esophageal smooth muscle. With two models of experimental esophagitis, we assessed the activity of p38 MAP kinase, p44/42 MAP kinase and JNK. In feline acute experimental esophagitis, immunoblotting of normal and esophagitis-induced smooth muscle with each types of MAP kinase antibodies revealed the slight increase of phosphorylated form of p38 MAP kinase, especially in membrane fraction. (omitted)

• Korean Journal of Veterinary Research
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• v.62 no.2
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• pp.16.1-16.4
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• 2022

We describe 7 cases of splenic smooth muscle tumors in dogs. Histopathological and immunohistochemical analysis revealed that 6 cases were diagnosed as splenic leiomyosarcoma and 1 case as leiomyoma. All dogs underwent splenectomy without chemotherapy, and one of them was euthanized 2 months after surgery because of hepatic metastasis. Of the remaining 6 dogs, 5 died in the postoperative period and only one dog survived > 4 years. The median survival of the 6 dogs was 16.9 months. To the best of our knowledge, this is the first detailed study on splenic smooth muscle tumors in dogs in Korea.