• Proceedings of the Korea Water Resources Association Conference
• /
• 2001.05a
• /
• pp.218-223
• /
• 2001

• Proceedings of the Korea Water Resources Association Conference
• /
• 2000.05a
• /
• pp.164-169
• /
• 2000

• Proceedings of the Korea Water Resources Association Conference
• /
• 2003.05b
• /
• pp.691-694
• /
• 2003

• Annual Conference on Human and Language Technology
• /
• 1995.10a
• /
• pp.300-309
• /
• 1995

언어표현에 대한 해석은 그 구성요소들의 통사적-어휘적 구조에 덧붙여 대명사의 동일지시를 살펴야 할 필요가 있다. 조응의 분석과 조응적 선행사를 찾기 위한 효과적인 방법을 발견하는 것이 컴퓨터 언어학(computational linguistics), 특히 자연언어 이해체계(Natural Language understanding system)에 관한 연구의 중심적인 문제라고 할 수 있다. 이 논문의 목적은 영어 조응표현을 개념구조 이론(Conceptual Structure Theory)의 개념도식(conceptual graph)에 의하여 기술함으로써 단문에서뿐만 아니라 복문, 양화구문, 그리고 담화에 이르기까지 언어 전반에 걸쳐 나타나는 동일지시성(coreferenciality)을 간단하고 일관성 있게 설명하는 것이다. 이러한 조응현상을 설명하기 위하여 필자는 개념도식상의 개념을 중심개념, 직접개념, 간접개념으로 구분하고 이들이 문맥깊이 등과 더불어 동일지시성을 설명하는데 중심적 역할을 함을 보이고자 한다.

• Transactions of the Korean Society of Mechanical Engineers B
• /
• v.32 no.1
• /
• pp.23-29
• /
• 2008

Two high resolution compressive schemes, CICSAM(Ubbink, 1997) and HRIC(Muzaferija & Peric, 1999), in interface capturing method are reviewed briefly with respect to the extended forms suitable for unstructured meshes. And then those are applied to three typical test cases of translation test, shearing flow test and collapsing water problem with an obstacle. It is accomplished by implementing the high resolution schemes in the in-house CFD code(PowerCFD) for computing 3-D flow with an unstructured cell-centered method, which is based on the finite-volume technique and fully conservative. The calculated results show that CICSAM is better than HRIC with respect to accuracy and robustness, although either scheme can be used as a good choice for free surface or two-phase flow simulation.

• 한국전산유체공학회:학술대회논문집
• /
• 2006.10a
• /
• pp.51-56
• /
• 2006

Several high resolution schemes such as OSHER, MUSCL, SMART, GAMMA, WACEB and CUBISTA are applied to two typical test cases of a translation test and a collapsing water column problem for the accurate capturing of fluid interfaces. It is accomplished by implementing the high resolution schemes in the in-house CFD code(PowerCFD) for computing 3-D flow with an unstructured cell-centered method, which is based on the finite-volume technique and fully conservative. The calculated results are found to show that SMART scheme gives the best performance with respect to accuracy and robustness.

• Journal of the Society of Naval Architects of Korea
• /
• v.45 no.1
• /
• pp.10-17
• /
• 2008

In this paper an accurate and stable gridless method that can be applied to multi-dimensional convection problems is developed on a flow directional local grid. A two dimensional pure convection problem is calculated and more accurate and stable solution is obtained compared with other schemes in grid method. The tested numerical schemes include 1st-order upwind scheme, 2nd-order Leith scheme, 3rd-order MUSCL, and QUICK scheme. It is seen that more accurate results are expected when the schemes combined with a MMT control limiter.

• Transactions of the Korean Society of Mechanical Engineers B
• /
• v.26 no.12
• /
• pp.1663-1673
• /
• 2002

In the present paper, flow and heat transfer characteristics of confined impinging slot jets have been numerically investigated using a SIMPLE-based segregated SUPG finite element method. For laminar jets, it is shown that the skin friction coefficient obtained from the present SUPG formulation approaches the grid-independent Galerkin solution inducing negligible false diffusion in the flow field when a moderate number of grid points are used. For turbulent jets, the k-$\omega$turbulence model is adopted. The streamwise mean velocity and the heat transfer coefficient respectively agree very well with existing experimental data within limited ranges of parameters.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
• /
• v.11 no.1
• /
• pp.73-80
• /
• 1999

This paper describes a numerical study of three-dimensional buoyant turbulent flow in a stairwell model with three convective differencing schemes, which include the upwind differencing scheme, the hybrid scheme and QUICK scheme. The Reynolds-averaged Navier-Stokes and energy equations are solved with a two-equation turbulence model. The Boussinesq approximation is used to model buoyancy terms in the governing equations. Three-dimensional predictions of the velocity and temperature fields are presented and are compared with experimental data. Three-dimensional simulations with each scheme have predicted the overall features of the flow fairly satisfactorily. A better agreement with experimental is achieved with QUICK scheme.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2013.06a
• /
• pp.346-348
• /
• 2013

우리나라는 해양사고의 약 70%가 영해 이내의 연안에서 발생하고 있다. 우리나라 연안은 천혜의 어족자원이 존재하면서 전국에 9,352건, 132,416헥타르의 양식장 및 정치어망 등이 설치되어 어민의 큰 수입원이 되고 있다. 한편 양식장 및 정치어망 등 어장은 선박의 안전한 운항에 저해요인이 되고 있으나 해도에 표시되어 있지 아니하여 선장 및 선교항해당직자들에게 항해계획의 수립단계에서부터 고려되지 않고 있다. 따라서 어장은 선박의 해양사고예방을 위한 해상교통 환경개선을 위하여 해도에 표시되는 것이 필요하고 판단된다. 이 글은 어장이 해양사고에 영향을 끼친 사례를 통해 어장의 해도도식 및 해도표시 필요성에 대한 의견을 제시하고 있다.