• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2011년도 춘계학술대회
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• pp.281-284
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• 2011

최근 유사석유제품 판매와 정량주유를 하지 않는 주유소로 인해 많은 운전자들이 피해를 입고 있고, 이러한 현상들이 점점 증가하여 앞으로 그 피해는 더 늘어날 전망이다. 유사석유제품을 사용함으로써 발생하는 피해는 연료계통의 윤활작용 및 자가 청정기능 문제, 부품의 조기 노후화 및 연료계통의 불순물 누적, 정품 휘발유와의 연소속도 차이로 인한 엔진의 부담 가중, 배기가스의 유독성물질 배출, 엔진오일과 확인되지 않은 화학적 반응 등이 발생하게 되는 문제점이 있다. 이러한 피해를 예방하기 위해 OBD-II 프로토콜로 자동차의 주행 내부정보를 받아 유사석유제품과 정량주유를 측정하고자 한다. 본 논문에서는 WinCe 기반의 개발보드를 이용하여 WiFi 통신을 지원하는 OBD-II 스캐너를 통해 주행 내부정보를 받아와서 현재 차량의 유사석유제품판별 시스템과 정량주유 시스템을 구현하였다.

• Korean Journal of Acupuncture
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• 제17권1호
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• pp.1-10
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• 2000

Gamdutang aqua-acupuncture solution(GAS) and Gamdutang water-extracted solution(GWS) were prepared and tested for potential antitumor activites. It was shown to possess considerable toxicity toward various tumor cell lines. Concentration of $5{\times}\;and\;10{\times}$ of GAS resulted in more than 70% inhibition of growth in Ehrlich ascites tumor cells(EATC), hepa1c1c7 and A549. GAS at the concentration of $10{\times}\;and\;5{\times}$ revealed that more than 60% inhibition in HeLa. GWS showed more than 50% in hibition of growth with EATC, HeLa at the concentration of $5{\times}\;and\;10{\times}$. Toxicity assay with GWS in hepa1c1c7 and A549 revealed that more than 80% inhibition in growth at the concentration of $5{\times}\;and\;10{\times}$. In morphological study, the number of cells were decreased, and the shape of cells was round-form. Most of cells in detached in EATC, Hepa1c1c7, HeLa, and A549 with GAS. These results suggest that GAS has antitumor activity in vitro.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2006년도 춘계학술대회
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• pp.419-423
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• 2006

Basic studies on natural gas hydrates in the East Sea were been carried out by the Korea Institute of Geoscience and Mineral Resources (KIGAM) from 2000 to 2004 involving 2D multichannel seismic lines and piston coring. 27 piston cores recovered from the deed-water Ulleung Basin of the East Sea were analyzed in this study. In piston cores cracks generally developed parallel to bedding suggest significant gas content. The core analyses showed high total organic carbon (TOC) content, sedimentation rate and heat flow of sediments. The cores recovered from the southern study area show also high residual hydrocarbon gas concentrations for the formation of natural gas hydrates. This study indicates that there is the potential for the generation of biogenic gas and the formation of natural gas hydrates in the near seafloor sediments of the study area.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 A
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• pp.561-563
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• 2003

This paper deals with simulation of lightning overvoltage generated by back flashover entering 345[kV] Gas Insulated Substation. In order to protect the substation equipment against lightning surge, insulation coordination is performed with the lightning arrester. This paper suggests optimal location of lightning arrester using the EMTP/ATPDraw to mere economically and effectively reduce the lightning surge incoming overhead lines.

• 천문학논총
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• 제30권2호
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• pp.107-108
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• 2015

In this project, all available databases of molecular and gas-dust clouds in the Galaxy were cross-identified by taking into account available properties, including position, angular dimensions, velocity, density, temperature and mass. An initial list of about 7000 entries was condensed into a cross-identified all-sky catalogue containing molecular and gas-dust clouds. Some relationships were studied between the main physical features of clouds. Finally, we prepared a complex observing program and address future work for filling in the gaps.

• 천문학회보
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• 제38권1호
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• pp.33.1-33.1
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• 2013

Galaxies undergo various processes in the cluster environment, which could affect their evolution. In particular, ram pressure due to intracluster medium (ICM) can effectively remove HI gas, which is a relatively diffuse form of interstellar medium (ISM). On the other hand, molecular gas is not expected to get easily stripped as atomic gas since it is denser and sitting well within the stellar disk in a deeper potential well. However, cluster galaxies are found to be redder and more passive in star formation activity compared to their field counterpart. This implies that molecular gas may also get affected somehow in dense environments. In this work, we investigate molecular gas properties of a sample of galaxies undergoing HI stripping due to the ICM. We present the 12/13 CO (2-1) data of four spiral galaxies in the Virgo cluster at different ram pressure stripping stages, obtained using the Sub Millimeter Array (SMA). CO morphology of the sample appears to be highly asymmetric and disturbed. Using the ratio of different lines, we probe the molecular gas temperature in different regions. We find higher gas temperature than the range normally found among field galaxies. We discuss how these distinct molecular gas properties may affect star formation and hence the evolution of the cluster galaxy population.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 A
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• pp.349-351
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• 2001

Because of the continuous growth of energy consumption and also the tendency to site power lines and pipelines along the same route, the close proximity of power lines and buried metallic pipelines has become more and more frequent. Therefore there has been and still is a growing concern about possible hazards resulting from the influence of power lines on metallic pipelines. When a ground fault occurs in an electrical installation the current flowing through the earthing electrode produces a potential rise of the electrode and of the neighbouring soil with regard to a remote earth. This paper analyzes the effects of ground faults when the current will flow into the soil from the foot of 345kV transmission line tower.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.168-172
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• 2008

Due to sustainable development, international environmental regulations have been reinforced continuously. As Kyoto protocol has been effective in 2005, the reduction of $CO_2$ emission is a global urgent problem. Especially, Kyoto protocol related to energy consumption affects to national production system seriously. In 2013, Korea greenhouse gas reduction obligations as the country is almost certain measures to respond steps to prepare a plan to reduce $CO_2$ emission of industry. Also, the Environmental impacts with a fundamental review for railroad lines do not yet come true. Therefore, the introduction of LCA will be required to decrease environmental impacts released from railroad lines in the future

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2005년도 춘계학술대회
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• pp.523-534
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• 2005

This paper is concerned with the integrated problem of line balancing and model sequencing in mixed model assembly lines(MMALBS), which is important to efficient utilization of the lines. In the problem, we deal with the objective of minimizing the overall line length To apply the GAs to MMALBS problems, we suggest a GA representation which suitable for its problems, an efficient decoding technique for the objective, and genetic operators which produce feasible offsprings. Extensive experiments are carried out to analyze the performance of the proposed algorithm. The computational results show that our algorithm is promising in solution quality.

• 대한안전경영과학회지
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• 제7권3호
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• pp.85-96
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• 2005

This paper is concerned with the integrated problem of line balancing and model sequencing in mixed model assembly lines(MMALBS), which is important to efficient utilization of the lines. In the problem, we deal with the objective of minimizing the overall line length To apply the GAs to MMALBS problems, we suggest a GA representation which suitable for its problems, an efficient decoding technique for the objective, and genetic operators which produce feasible offsprings. Extensive experiments are carried out to analyze the performance of the proposed algorithm. The computational results show that our algorithm is promising in solution quality.