• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.905-908
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• 2008

인터넷의 등장은 인간사회의 의사전달 체계가 발전하는 과정에서 가장 큰 혁명적 사건으로 국가간 경계를 허물고 경제시장을 글로벌화 시키는 주요한 역할을 하였다. 현재 우리나라 인터넷 사용인구는 3,440만명(2007. 2월 기준)으로 전체인구의 50%이상이 활용하고 있으며 사회 경제전반에 중요한 매체 역할을 하고 있다. 본 논문은 현재 중앙 집중 형태로 관리 운영되고 있는 우리나라 인터넷교환(IX)센터의 운영현황 및 문제점을 파악하고 개선방안을 도출하였다. 또한 정부에서 최초로 2003년부터 2007년까지 부산지역 1개소에 구축한 IX(Internet Exchange; 인터넷교환센터)구축 운영의 통신정책 실패사례를 분석하고 지역 인터넷 불균형 해소를 통한 국가균형발전과 지역 IT산업 발전방안의 새로운 정책모델을 개발 제시하였다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1988.05a
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• pp.84-87
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• 1988

cIn this paper. we evaluate the breakdown and TDDB characteristics of ammonia free ECVD SiN films which studied widely as a gate insulator to substitute the silicon dioxide because of it's superior film characteristics with the merit of low temperature process. And also, we propose a new statistical model by introduce a dispersion factor in the traditional Weibull statistics. From the comparison of experimental result, and simulation one, try to dock the breakdown mechanism and statistical analysis.

• Journal of Korea Foundry Society
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• v.28 no.4
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• pp.166-169
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• 2008

This study deals about the development of fusible core with low melting temperature by addition of ceramic particles. A new concept of salt core was introduced to produce an integrated casting part having a complicated inner shape or requiring under-cut in high pressure die casting or squeeze casting process. The mechanical properties of fusible core were improved due to the addition of ceramic particles which helped to produce fine microstructure. The new technology for the preparation of new fusible core materials which possess high compression strength was established. Addition of ceramics particles increased the mechanical properties of fusible core materials. There was an increasing relationship between percentage of ceramic particles and mechanical strength was existed up to 60%.

• Transactions of the Korean Society of Automotive Engineers
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• v.16 no.3
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• pp.44-51
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• 2008

The performance design and analysis of an electric motor for vehicles is very complicated due to the variety of parameters. This paper presents the design of the BLDC motor for electric air compressor in high voltage(42V) system and compares with the characteristics of IPM, SPM type BLDC motor. Futher, optimal design for the electric motor has been carried out using Equivalent Magnetic Circuit and FEM Modelling. By analyzing the design results, it is found that design parameters for BLDC motor provided an useful tool for vehicles motor design.

• Journal of the Korean Society of Food Culture
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• v.1 no.2
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• pp.101-115
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• 1986

This study was designed to establish Korean food culture by analizing 17 sets of Jinyounuigue(진연의궤) Jinchanuigue(진찬의궤), and Jinjarkuigue(진작의궤) which were the records of royal party procedures in Yi dynasty. Side dishes were classified into 20 groups in this study ; Tang (場) 19, Jungol (전골) 3, J'im 18, Jun (전) 20, Jock 14, Pyunuk (片肉) 14, Cho 12, Hyae 17, Po 8, Chae 3, Bung 1, Nanri 1, Sooran 1, Sookran 1, Jaban 1, Kimchi 2, etc. all of 140 different kinds of side dishes. There was no tendency in omission or addition of food materials. Food materials were beef, pork, lamb, chicken, duck, peasant meat, dock's egg, fish, shellfishes, mollusca, curstacea, seaweeds, vegetables, fruits, beancurds, muk (a starch jelly), d'ock, muchrooms, etc. Seasonings were soysauce, pepper, sesame oil, ginger, green-onion, garlic, bean paste, ginger powder, red pepper powder, red pepper paste, salts, vinegar, honey, sesame power, etc.

• Journal of the Society of Naval Architects of Korea
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• v.41 no.5
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• pp.1-7
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• 2004

The Spar platform with deep draft is characterized as effective structure in extreme wave condition, which has larger natural period than that of waves in sea. In this paper, the time domain simulation of motion responses of Spar with catenary mooring line is presented in irregular waves. The memory effect is modeled by added mass at infinite frequency and convolution integrals in terms of wave damping coefficients. The added mass, wave damping coefficients and wave exciting forces are obtained from three-dimensional panel method in the frequency domain. The motion equations are consisted of forces for inertia, memory effect, hydrostatic restoring, wave exciting and mooring line. The forces of mooring line are modeled as quasi-static catenary cable.

• Journal of Korea Port Economic Association
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• v.22 no.1
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• pp.39-59
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• 2006

The purpose of this paper is to analyze the competitiveness between Busan New Port and Shanghai's New Yangshan Port, on an island 20 miles off the Chinese mainland coast. For this aim, the paper examines backgrounds of Yangshan Port construction and its related projects, namely, Donghai Bridge and Luchao Logistics Park including operation strategies of Yangshan New Deepwater Port. The main results of this paper are as follows: Busan New Port has competitive advantage over Yangshan Port in terms of ideal location, especially in Asia-North America route, and connection between terminal and hinterland logistics park. Because Busan New Port is operated by fully on-dock system. Nevertheless, Yangshan Port has more strength in its centrality, port tariff and port productivity, which are represented by crane productivity, quay productivity and area productivity. Therefore, Korean ports are recommended by transformation from cargo attraction-type to cargo generation-type port through early activation of port logistics center along with Free Economic Zone.

• Journal of Korea Port Economic Association
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• v.22 no.2
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• pp.19-33
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• 2006

The efficiency and effectiveness of freight transportation within and across Northeast Asia playa key role to achieve competitive advantages against other competing hubs in this area. However, the majority of local freight has been carried by ground transportation and the share of costal shipping has been decreasing for its transportational complexity and poor cargo works. In this paper, we discuss the prerequisites of efficient cargo linkage system from the perspectives of road, rail, ocean, and the service providers. Specifically, we identify that the balanced capacity of road/rail transportation system with costal freight system is a crucial component for facilitating coastal shipping. Other requirements such as the efficient on-dock container yard (ODCY), dedicated ports and ships, and the service provider of door-to-door transportation for short sea shipping are highlighted in order to secure the serviceability and availability of streamlined costal shipping. Further, we elaborate these requirements to facilitate costal cargo shipping in Korea.

• Journal of Korean Society of Water and Wastewater
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• v.24 no.5
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• pp.573-580
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• 2010

Average pressure in a pipe network is one of critical factors to estimate the flow distribution and to calculate UARL (Unavoidable Annual Real Losses) value in ILI (Infrastructure Leakage Index). While its collection period and measuring location are essential to obtain average pressure, their standard method have not been established so far. In this study, proper method including its procedure for data collection period and measuring point for average pressure were suggested using non-exceedance probability concept in the water distribution network.

• Journal of the military operations research society of Korea
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• v.9 no.2
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• pp.23-30
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• 1983

A simulation study was conducted to determine optimum capacity of Navy drydock facility using GASP-IV, an advanced FORTRAN-based simulation language, under demands of regular overhauls and emergency repairs by ships of an hypothetical fleet composition. Three year dock usage data was analyzed to produce probability distributions underlying drydock repair demands. The present facility size of two drydocks was simulated and was found to be somewhat short of adequate service capability, showing excessive average waiting time and average queue length. The simulation model was then modified to include an additional drydock of similar size as the other two and a year's simulation was again conducted. All repair needs were quite satisfactorily met and all docks showed very high utilization factor (0.98). This contributed to an increase in the fleet's ship availability from 0.95 to 0.99. This study illustrates the usefulness of simulation technique as a tool for analyzing policy alternatives in military long-term investment areas.