• KIPE Magazine
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• v.24 no.1
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• pp.60-65
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• 2019

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.05a
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• pp.4-6
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• 2023

지역 VTS 센터의 관제 데이터를 클라우드 기반의 통합 플랫폼에서 수집하기 위해 주요 관제 장비별로 표준 데이터를 제시하고자 한다.

• The Magazine for Energy Service Companies
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• s.23
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• pp.22-25
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• 2003

자동제어사업의 선두주자로 그동안 축적해온 기술과 노하우를 ESCO사업에 적극 적용하고 있는 한국하니웰은 해마다 사업실적 최상위권을 유지하며 에너지절약시장에서 맹위를 떨치고 있다. 이 회사는 부설연구소 뿐 아니라 국내외 유수의 에너지절약 관련 연구소와의 공동연구를 통해 연구결과를 사업에 적용, 지원하는 시스템을 채택하는 한편, 미국 하니웰사와 연계한 탄탄한 기술력을 바탕으로 에너지절약시설 제공 및 설치를 포함하는 턴키(Turn Key)방식의 ESCO사업을 적극 추진하고 있다.

• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.397-397
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• 2017

수면증발량은 수자원 계획 및 활용에 있어 매우 중요한 요소이다. 하지만, 현재 수면증발량관측 지점은 용담댐, 안동댐뿐이다. 이중 장기간 관측 자료가 축적된 용담댐 지점을 대상으로 연도별 수면증발량 관측 자료를 비교 검토 하고자한다. 용담댐에 부착되어 있는 수면증발량계는 0.03 mm 분해능을 가지는 부력식 수위계(BYL-EV250, 대한민국)를 사용하고 있으며, 2014 년도 2 월부터 17 년 현재까지 관측을 하고 있다. 관측 자료로 보았을 때, '14년도 가장 많은 증발량이 발생된 달은 9월(102.63 mm/month), 적은 달은 2월(22.99 mm/month) 이였으며, '15, '16년는 각각 100.91 mm/month, 114.38 mm/month로 8월이 높고, 29.11 mm/month, 25.83 mm/month로 2월이 가장 적었다. 아래 표는 14~16년도 월평균 일 증발량 및 총 수면증발량을 나타낸 것이다. 월별 일평균 증발량을 비교한 결과 0.92~3.08 mm/day로 나타났으며, 5월부터 10월까지 많은 량(약 2.9 mm/day)이 증발되는 것으로 나타났다. 연도별 월평균 일 증발량은 9 월이 3.08 mm/day 로 증발량이 많고, 2 월이 0.92 mm/day로 적은 증발량의 관측이 되었다. 총 수면증발량은 8 월이 92.73 mm/month 으로 증발량이 가장 높았으며, 2 월이 25.97 mm/month 로 가장 적은 증발량이 관측되었다. 저수지 수면에서의 증발은 풍속, 수온, 대기온도, 일사량 등에 영향을 많이 받음에 따라 수온이 가장 낮은 2월에 증발량이 가장 적게 나타난 것으로 판단된다.

• Journal of the Korean Association of Geographic Information Studies
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• v.21 no.4
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• pp.108-118
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• 2018

Recently, agricultural sector apply ICT technology such as Smart Farm to pursue innovation in the changing situation that is emerging as the fourth industrial revolution. However, this innovation requires techniques for forecasting and analyzing in various data bases and spatial information provides such infrastructure data. In this study, the cultivation area of Chinese cabbage, radish, garlic, onion, and red pepper were calculated and analyzed by year. The purpose of this analysis is to cope with sudden changes in vegetable crops and changes in cultivated area caused by weather changes to supply and demand of major vegetables and price instability. As a result of this study, spatial information based on time series information of vegetable complex will be used as efficient agricultural environment observation data, as well as interpretation of various spatial ranges such as the estimation of cultivation area using remote sensing.

• Journal of the Korea institute for structural maintenance and inspection
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• v.23 no.5
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• pp.48-59
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• 2019

In recent years, the type of bridge where cables such as suspension bridge and cable-stayed bridge are the main factors in the construction of long-range bridges has been soaring. The effects of cables on these structures are very large, and for structural analysis, it is necessary to study the cable and the structural changes according to the mode characteristics of the cables. In particular, cables are directly connected to camber adjustment, which conveys load effects on girders to tower, and are important components in the overall structure, and since the initial tension on the construction is compared with the tension over time, this study was conducted to help identify the condition of the bridge's aging and abnormalities. Therefore, in this study, the characteristics of the mode from the mode analysis through the impact hammer to the mass of the cable and the change in the length of the cable are analyzed.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.18 no.5
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• pp.142-155
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• 2019

This study was conducted with the aim of developing a system to collect taxi GPS probe information to prevent link defects and to improve the accuracy of the standard link-based travel speed by determining when to go into and come out the link. For this purpose, a framework and algorithm consisting of a five-step process for standard link-based map matching and individual vehicle travel speed are presented and used it to calculate the average travel speed of the service link. Two on-site surveys of Teheran and Hakdong-ro were conducted to verify the results by the methods proposed in this paper. On the basis of the overall time of the field survey, the deviation in the travel speed was 0.2 km/h and 0.6 km/h, the accuracy was 99% and 96%, and the MAPE(Mean Absolute Percentage Error) was 1% and 4% in Teheran and Hakdong-ro, respectively. These results were more accurate thand those obtained using conventional methodologies without standard links.

• Journal of the Korean Association of Geographic Information Studies
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• v.25 no.1
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• pp.1-15
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• 2022

In order to trust and use autonomous vehicles, safe driving on the road must be guaranteed. For this, the first infrastructure to be equipped with autonomous driving is traffic safety facility. On the other hand, autonomous vehicles(Level 3) and general vehicles are driving on the road, it is necessary to additionally manage existing general traffic safety facilities. In this study, a field management system for traffic safety facilities based on autonomous driving infrastructure was studied, and a pilot field management system was implemented in the demonstration area(Pangyo). The pilot system consists of a GNSS(Global Navigation Satellite System) receiver, a field management equipment, and a field management app. As a result of field demonstration,, it was confirmed that traffic safety facility information was easily transmitted and received even in downtown areas and that could be efficiently operated and managed. It is expected that the results of this study will be used as reference materials for the spread of autonomous driving infrastructure to local governments and infrastructure construction in the future.

• Atmosphere
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• v.32 no.3
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• pp.235-246
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• 2022

A large number of MJO skill metrics and process-oriented MJO simulation metrics have been developed by previous studies including the MJO Working Group and Task Force. To assess models' successes and shortcomings in the MJO simulation, a standardized set of diagnostics with the additional set of dynamics-oriented diagnostics are applied. The Global Coupled (GC) model developed for the operation of the climate prediction system is used with the comparison between the GC2 and GC3.1. Two GC models successfully capture three-dimensional dynamic and thermodynamic structure as well as coherent eastward propagation from the reference regions of the Indian Ocean and the western Pacific. The low-level moisture convergence (LLMC) ahead of the MJO deep convection, the low-level westerly and easterly associated with the coupled Rossby-Kelvin wave and the upper-level divergence are simulated successfully. The GC3.1 model simulates a better three-dimensional structure of MJO and thus reproduces more realistic eastward propagation. In GC2, the MJO convection following the LLMC near and east of the Maritime Continent is much weaker than observation and has an asymmetric distribution of both low and upper-level circulation anomalies. The common shortcomings of GC2 and GC3.1 are revealed in the shorter MJO periods and relatively weak LLMC as well as convective activity over the western Indian Ocean.

• Journal of Marine Bioscience and Biotechnology
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• v.14 no.2
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• pp.61-68
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• 2022

This study aimed to investigate the hepatoprotective activities of the sea cucumber products, including extracts and hydrolysates, in vitro and in vivo. Dried sea cucumber, produced on the western coast of Korea, was boiled in water or 70% ethanol at 85℃ or 100℃ for 18 or 24 h, respectively, to extract bioactive compounds. The enzymatic hydrolysates were prepared by reacting the dried sea cucumber with pepsin or neutral protease (PNL) under optimal enzyme conditions. The anti-inflammatory effect of the samples was investigated using RAW 264.7 cells treated with lipopolysaccharide (LPS). The amount of nitric oxide (NO) was produced from the cells treated with LPS and each sample was compared. Therefore, the pepsin hydrolysate treatment decreased NO production compared to LPS sole treatment. Furthermore, the effects of the samples on cell injury in the hepatic cell line and bisphenolA-induced hepatic injury mouse model were investigated. The water extracts and the pepsin hydrolysates of sea cucumber significantly inhibited cell injury generated in the hepatocytes without cytotoxicity (p < 0.05), whereas the ethanol extracts were cytotoxic. However, these results indicate that the extracts and the enzymatic hydrolysates derived from sea cucumber can be used as beneficial materials for inhibiting liver damage.