• 한국해양학회지
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• v.22 no.2
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• pp.63-70
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• 1987

Existing oceanographic data indicate that tidal mixing fronts generally prevail in the Eastern Yellow Sea along the Korean coast. In the Western part, these fronts seem to be much weaker. These fronts are believed to be generated mostly by spatially different tidal mixing. The geostrophic adjustment model applied to the observed density structure gives the mixed coastal water flowing northward and the offshore waters(both surface warm and bottom cold waters) flowing southward along the Korean coast. The transport of each water amounts to O(10$\^$4/)m$\^$3//sec.

• Journal of The Korean Astronomical Society
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• v.9 no.1
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• pp.1-6
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• 1976

The translational and reactive parts of thermal conductivity of a partially ionized solar magneto-plasma gas have been calculated based on Yun and Wyller's formulation (1972) along with Devoto's theory(1968). The computed results are presented as functions of temperature and pressure for given magnetic field strengths. The results of the calculations show that for most photospheric conditions the magnetic field does not play any important role in characterizing thermal properties of the ionized gas. However, when the gas pressure is low(e.g., P<10 dynes/$cm^2)$) the field becomes extremely effective even if its strength is quite small (e.g., B<0.1 gauss). The reactive part of the thermal transport is found to be very important when the gas is undertaking active ionization.

• Geomechanics and Engineering
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• v.13 no.6
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• pp.963-975
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• 2017

Improvement of soft clay deposit by preloading with vertical drains is one of the most popular techniques followed worldwide. These drains accelerate the rate of consolidation by shortening the drainage path. Although the analytical and numerical solutions available are mostly based on equal strain hypothesis, the adoption of free strain analysis is more realistic because of the flexible nature of the imposed surcharge loading, especially for the embankment loading used for transport infrastructure. In this paper, a numerical model has been developed based on free strain hypothesis for understanding the behaviour of soft ground improvement by vertical drain with preloading. The unit cell analogy is used and the effect of smear has been incorporated. The model has been validated by comparing with available field test results and thereafter, a hypothetical case study is done using the available field data for soft clay deposit existing in the eastern part of Australia and important conclusions are drawn therefrom.

• Journal of Radiation Industry
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• v.2 no.3
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• pp.155-161
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• 2008

A hydraulic scale model was constructed to investigate the characteristics of flows and pollutant transport in laboratory. The distorted hydraulic scale model by assuming Froude similarity was adopted to represent hydrodynamics and dispersion in a river system. The scale model was composed of water reservoir, slope control part, booster pump, distributing plate and main channel. A constructed scale model will be used to present the overall concentration profiles of tracer and a research will be performed to convert the measured values using a hydraulic scale model to real field scale.

• Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
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• 2014.10a
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• pp.74-85
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• 2014

This study is a part of "Early Warning Service for Weather Risk Management in Climate-smart Agriculture", describes the delivery techniques from 840 catchment scale weather warning information using 150 counties unit special weather report(alarm, warning) released from KMA(Korea Meteorological Administration) and chronic weather warning information based on daily weather data from 76 synoptic stations. Catchment weather hazard warning service express a sequential risk index map generated by countries report occurs and report grade(alarm, warning) convert to catchment scale using zonal summarizing method. Additional services were chronic weather warning service at crop growth and accumulated more than 4 weeks, based on an unsuitable weather conditions, representing a relative risk compared to its catchment climatological normal conditions (normal distribution ) in addition to special weather report. Service provided by a real-time catchment scale map overlaid with VWORLD open platform operated by Ministry of Land, Infrastructure and Transport. Also provide a foundation for weather risk information to inform individual farmers to farm located within the catchment zone warning occur.

• Journal of the Korea Safety Management & Science
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• v.17 no.3
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• pp.81-88
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• 2015

Infrastructure such as tracks, catenary, rolling stock and signaling systems, and close interface with the human factors of train drivers, shunting staff and maintenance staff are required for train operations. Safety management is the most essential part for the functioning of a train. In line with the safety management, each rail operator has a safety guidance system and the Ministry of Land, Infrastructure and Transport operates Railway Safety Inspector system. Safety Inspector System is to train employees working in the field to be aware of rules and regulations, and to improve identified risk factors. Hence, it is necessary to establish systematic training and inspection methods for safety guidance staff and make clear the roles and responsibilities of safety inspectors according to the Occupational Safety and Health Act, and safety instructors for several inspections according to the Railroad Safety Act.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.1839-1852
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• 2008

Japanese government actively took part in the TSR modernization. the amount of trade between Russia & Japan increased increasingly by 55%, as the individual income increases in Russia, it becomes a big scale consuming market, therefore Japan concentrates on lobby to push into the russian continent and also Japanese government will participate in aggressively to the cooperation with Russian government, loaning to the TSR modernization & trade insurance, high speed train introduction, and introduction of transport system. this study checks and analyzes the japan's concrete methods & strategy to advance to the continent, and also this case can be applied to South korea, if TKR corridor is continuously blocked. I want to review the cooperation of north & south, and the project of continental railways.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.1860-1880
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• 2008

Railroad a field of basic industries in Korea had developed as representative transportation means in the interior. But since the 1970s, its transport requirement decrease had influenced in reduced earning. Thus railroad try to find a various subsidiary earning creations. Among the various subsidiary earning creations, a plan of privately financed station buildings is constructing and using. For the mean time the privately financed station have been constructed by in a narrow sensible development. But now like a Yongsan areas surrounding stations development, comprehensive development think over surrounding stations in a wide sensible development. Dae Jaen Station the traffic center of the south part in Seoul had been constructed by privately financed station of Lotte Shopping Co.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.30 no.4
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• pp.92-97
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• 2022

In the Aviation Safety Act, the part about fatigue management of Flight dispatcher was added as an amended law. Prior to the amendment of the Act, the regulations on fatigue of flight dispatcher governed by the FOM approved and reported by airlines according to the Ministry of Land, Infrastructure and Transport, but were enforced by law from June 9, 2021. In this study, the scope and work type of flight dispatchers are checked, and unlike flight attendants, it is intended to consider legal working hour management measures for flight dispatchers according to the enforcement of the fatigue management act.

• Progress in Superconductivity and Cryogenics
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• v.9 no.4
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• pp.11-15
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• 2007

In practical applications of HTS tapes for electric devices such as coils and power cables, the jointing of HTS tapes is inevitable even though long length tapes have recently been achieved. The critical current, $I_c$, degradation behaviors with tensile and bending deformations were investigated in commercially available YBCO coated conductor tapes. When the V-I relationship was measured at the jointed section of the lap-jointed YBCO CC tapes, the resistance at the joint decreased with increasing joint length. The critical load for 95% $I_c$ retention were determined for the IBAD and RABiTS YBCO tapes and they were 175 and 355N, respectively. Fracture occurred at the unjointed part which represents strong copper lamination and solder jointing. The electro-mechanical properties of lap-jointed CC tapes depended on the properties of single tapes. The V-I behavior under bending strain was similar with the tensile case.