• Transactions of the Korean Society of Mechanical Engineers A
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• v.34 no.11
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• pp.1733-1740
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• 2010

The analysis of the dynamic behavior of the packaging of a drum washing machine has been carried out under the drop impact conditions. LS-DYNA software is used for performing the finite element analysis, and the validations are performed by comparing with the impact acceleration, effective stress and deformation of cushioned package with high-speed camera during free drop test. By analyzing the cushion characteristics and the design parameters of the original packaging, a packaging with an improved design is developed, and this design is validated on the basis of the results of the distribution test which consists of drop test, vibration test, stacking test, squeez test and so on. The drop impact simulation and analysis methods developed in this study can be adopted to successfully improve the cushioning provided by the packaging and to reduce the cost involved in developing new packaging for drum washing machines.

• Korean journal of communication and information
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• v.62
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• pp.286-314
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• 2013

The purpose of this paper is to explore the effect of stereotype, public frame, and Twitter remediation on country reputation. Diaoyudao/Senkaku dominium dispute was chosen which has been a lasting territorial problem between Japan and China. According to a survey conducted toward 210 Koreans aged 20 to 40, stereotype of Japan and China has effects on each reputation. Legitimacy-securing frame only affect China's country reputation. While stereotype of Japan and 'attribution to Japan's responsibility' frame significantly interacted with Japan's country reputation, stereotype of Japan and 'attribution to both sides' responsibility' frame also interacted with Japan. Also, Twitter remediation activity categorized into producing, distributing and viewing was examined. Only producing and viewing had effects on Japan's reputation. In terms of interaction, the more opinion leaders do distributing, the more they agree on attribution to both sides' responsibility frame, and recognize China's reputation more positive. Consequently, it was proved that Twitter opinion leaders interpreted public frame and recognized country reputation in a different way compared to the normal Twitterians.

• Journal of Navigation and Port Research
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• v.27 no.5
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• pp.539-546
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• 2003

The numerical model of the flow analysis by finite element technique is described. The Galerkin method is employed for spatial discretization Two step explicit finite element scheme is used to discretize the time function, which has advantage in problems treating large numbers of elements and unsteady state. Two dimensional hydrodynamic model considering moving boundary condition is developed. Also it applied flow model which develop on flow portion of ideal fluid in the model flume and verified, and the results of this study confirm the efficiency of moving boundary treatment in Jeju harbor. The computed results have shown the good adaptability of moving boundary condition From these studies, it can be concluded that the present method is a useful and effective tool in tidal flow analysis.

• Journal of the Korean Society for Railway
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• v.11 no.1
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• pp.13-18
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• 2008

In this study, unsteady wind pressure analyses on platform screen door (PSD) have been conducted considering the flow intereference effects between the moving train and the configuration of subway station. The major role of PSD prevents passenger accidents, wind pressure, polluted dust and noise when the train is entering the station platform. Computational fluid dynamic method with moving gird algorithm has been adopted to accurately predict unsteady pressure levels exerted on the PSD. Closed and open type station configuration are considered. Also, wind pressure levels for passing and stopping drive motion of the entering train are presented and practically compared each other.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.465-468
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• 2004

오늘날 인터넷 상의 디지털 콘텐츠는 기하급수적으로 증가하여, 콘텐츠를 관리하기 위한 다양한 시스템과 관리 체계가 연구 개발되고 있다. 특히 2000 년대부터 식별체계에 대한 표준화 연구가 진행되면서 논문등의 문헌 정보와 음악, 영상 등의 콘텐츠에 식별 체계를 적용하고 관리하려는 연구가 활발히 진행중이다. 특히 국내에서는 정보통신부와 한국소프트웨어진흥원이 디지털콘텐츠 유통기반을 구축하기 위해 CONPIA.COM 사이트를 개발하였고, 2000 년 정보화지원사업으로 한국데이터베이스진흥센터에서 디지털콘텐츠 식별체계 사업을 진행하었다. 이후 2001 년 정보통신부가 한국전산원를 디지털콘텐츠 운영기관으로 지정하면서 확장개발 및 운영 시험 등 향후 서비스 운영에 대한 기술개발에 집중하고 있다. 이러한 시스템에 적용된 식별 체계는 체계적인 구문 구조를 가지고 있으며 구문구조에 맞는 식별 코드를 해석하여 디지털콘텐츠를 찾는 구조를 가진다. 그렇지만 기존의 시스템은 식별체계의 확장과 변화에 따라 시스템 인터페이스를 재설계하고 내부 처리 알고리즘을 수정해야 하는 등 많은 수정이 요구된다. 이에 본 논문에서는 DDDS 알고리즘을 적용하여 식별 코드를 해석하기 위한 시스템을 구성하고 사용자 인터페이스를 설계하였다.

• Journal of the Korean Society of Food Science and Nutrition
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• v.26 no.4
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• pp.595-600
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• 1997

To extend the shelf-life of Kochujang, the effects of anti-browning agents and their optimum concentrations were evaluated using organic acids as synergists. Among the physicochemical analyses, amino nitrogen content exhibited the highest correlation with sensory score. Ascorbic acid and citric acid were selected among the anti-browning agents(ascorbic acid, potassium sorbate, calcium chloride) and organic acids(citric acid, lactic acid, oxalic acid) tested on the basis of the highest amino nitrogen content during storage at 55$^{\circ}C$. The appropriate concentration of ascorbic acid was 0.03% based on amino nitrogen content during storage at 55$^{\circ}C$. Combination of 0.06% citric acid with 0.03% ascorbic acid showed the highest amino nitrogen content during storage at 55$^{\circ}C$. From the results, the 0.03% ascorbic acid and 0.06% citric acid were selected as additives for extending the shelf-life. Control(no additive) and additives(0.03% ascorbic acid and 0.06% citric acid) were tested for physicochemical and sensory analyses during storage at 45$^{\circ}C$ and 55$^{\circ}C$. Amino nitrogen content was also highly correlated with sensory score, The marginal amounts of amino nitrogen for control and additives were 174.9mg% and 173.2mg%, respectively. Degradation rate of amino nitrogen was a first order reaction. Compared to control, the predicted shelf-life for adding additives increased 69% and 56% at 45$^{\circ}C$ and 55$^{\circ}C$, respectively.

• The Journal of Engineering Geology
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• v.2 no.2
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• pp.113-130
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• 1992

Groundwater in crystalline basement is controlled primarily by tectonic fractures. It is evident that the delineation of the heavily faulted area and/or fractures deeply developped should be considerable value in deep-seated low enthalphy geothermal water. Electrical and electromagnetic methods have effectively been employed to map hydraulic faults and shear zones for groundwater exploration. In this study VLi; dipoledipole resistivity, controlled source audio~frequency magneto-telluric(CSAMT) and magnetic methods were applied in the Bomun resort area, adjacent to Kyongju city, southeastern part of Korea. The integrated geophysical tools employed in this experiment can be manifested themselves as: 1. Magnetic high for granite intrusions which is more favorable for geothermal gradient increase in depth. 2. VLF cross-over trends for mapping linear shallow conductive fractures and shear zones. 3. Dipole-dipole resistivity distributions for the deep-seated(less than 500m in depth) fractures and shear zones. The dipole-dipole resistivity field data were inverted to the true resistivity distribution with two-dimensional automatic inversion program based on the finite-difference method. 4. CSAMT provides an efficient way of delineating fractures and fault zones if the depth is greater than about 500m.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.30 no.6
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• pp.78-83
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• 2002

A modified patched grid scheme has been developed and employed for and axi-symmetric unsteady Euler solver based on Roe's FDS to analyze the unsteady flow fields induced by a train and a tunnel. On this paper, the innovative zonal method, named hybrid dimensional approach, was proposed and applied to the train-tunnel interaction problems. The basic idea of this method is to maximize the efficiency of numerical calculations by minimal assumption of spatial dimensions. The hybrid dimensional approach, embedded in the present modified patched grid method, yielded high numerical accuracy as much as the fully axe-symmetric method. The hybrid dimensional approach is expected to reduce the huge computation time of the train-tunnel interaction problems especially in the cases of solving a long tunnel.

• Proceedings of KOSOMES biannual meeting
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• 2007.05a
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• pp.169-174
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• 2007

The purpose in having a control rod an a buoy system is to control the motion of it. The system may be composed entirely af a single circular cylinder finder and a lang mooring anchor cable. A control rod has one function to perform in meeting its purpose, and that is to develop a control force in consequence of its orientation and movement relative to the water. The forces and moments generated as a result of the effects of mutual interference, then determine the stability characteristics of the body. In this paper, the study of control-rod-attached buoy's 2-dimensional section was accomplished. model tests and numerical simulations had been carried out with different diameters of control rods. and varying the Reynolds number $Re=5,000{\sim}25,000$ based an the cylinder diameter(D=50mm) to. predict the performance af the body and the 2 frame particle tracking method had been used to obtain the velocity distribution in the flaw field 50mm circular cylinder had been used during the whale experiments and measured results had been compared with each other.

• Journal of Korea Port Economic Association
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• v.25 no.1
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• pp.169-190
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• 2009

In order to establish whether any charterparty terms are incorporated into the bill of lading, the first necessity is to specify the charterparty alluded to the incorporation clause in the bill of lading. However, this becomes a potential problem where the date of a charterparty is not inserted on the face of the bill of lading in case a vessel is in operation under a number of charterparties. Over many years this issue has frequently been raised before the English courts, but it is still causing problems. The purpose of this study is to examines the several English authorities which dealt with the issue relating to the specification of charterparty incorporated into the bill of lading and to present some interpretation rules and the order of priority. As a result, the comparative analysis of English authorities shows that they failed to give dear guidance on this issue. This article therefore suggests four interpretation rules such as the precedence of a B/L's face, the rule of appositeness, surrounding circumstances, the contra proferentem rule and shows that the precedence of a B/L's face is most applicable for all parties.