• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 추계학술대회 논문집(제2권)
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• pp.105-109
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• 2006

LNG 선박의 급증에 의한 승무원 심각한 부족현상에 대비하여, STCW의 전면 개정 등과 같은 IMO의 대응은 물론 각 국가에서도 승무원 양성을 위한 교육과정의 개설은 물론 관련 법제 정비 등으로 대응방안을 마련하고자 노력을 하고 있다. 이러한 시점에서 국제해사대학연합과 한국해양대학교를 중심으로 한 아시아 LNG 교육훈련센터에서는 향후 국제무대에서 활약할 LNG 교육훈련강사를 양성하기 위한 전문과정을 추진하고 있다. 이 발표에서는 LNG 교육훈련 전문강사 과정의 개요를 살펴보고, 이러한 과정을 효율적으로 운영하기 위한 시뮬레이터의 활용방안에 대하여 설명하고자 한다.

• International Journal of Control, Automation, and Systems
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• 제1권2호
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• pp.257-261
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• 2003

In this study, we investigated the modeling and design of an Intelligent Agent System (IAS). To achieve this goal, we introduced several kinds of agents that exhibit intelligent features. These are the main agent, management agent, watcher agent, report agent and application agent. We applied the intelligent agent concept to two different application fields, i.e. the intelligent agent system for pattern classification and the intelligent agent system for bank asset management modeling.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2006년도 전기학술대회논문집
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• pp.229-230
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• 2006

해상플랫폼설치가 불가능한 심해지역이나 파도가 심한 해상에서 원유를 발굴하는 선박형태의 시추설비인데, 심해에서의 시추능력은 물론 기동성까지 겸비한 고부가치선으로서 최근 고(高)유가에 따라 발주가 늘어나고 있는 해양분야의 대표적인 성장엔진으로, 파도와 바람이 심한 해상에서도 안정적 시추가 가능한 최첨단 자동위치 제어시스템, 드릴링장비, 통합제어시스템 등, 드릴쉽이 갖추고 있는 시스템에 대해 간단히 설명한다.

• 대한가정학회지
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• 제36권11호
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• pp.209-218
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• 1998

The purpose of this study was to conduct the review of female labor suply, and thus, to provide useful theoretical and empirical frameworks for future studies related to female labor supply. Based on the theory of the allocation of time, the process of individual labor supply was systematically reviewed. Participation Probit/Logit, Tobit, and Selection B;ias Corrected Regression were considered in estimating the function of female labor supply which modifies the selection bias. Based on the previous empirical results, wage rate, asset income, husband's income, the level of eduction, and child-related variables such as the presence of child and the number of children might be considered for the empirical specification of female labor supply.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2015년도 학술발표회
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• pp.458-461
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• 2015

연구는 북한지역의 표토침식량 산정을 위하여 토양침식을 유발하는 강우침식인자를 산정하고 장기간에 걸친 경향성을 분석하기 위한 연구로서, 대상지역은 평양 관측소 지점의 1981~2014년의 강우자료를 이용하였다. 가용한 북한지역의 강수량은 월강수량이기 때문에, 강우침식인자의 산정은 수정 IAS 지수를 이용한 추정방법과 연강수량을 이용한 추정방법을 적용하였다. 연강우침식인자에 대한 경향성 분석결과 평양지점의 장기간에 걸친 연강우침식인자 값에 대한 뚜렷한 경향성은 발견되지 않는 것으로 나타났다.

• Journal of Magnetics
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• 제11권2호
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• pp.70-73
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• 2006

The magnetization angle and thickness dependence of magnetic anisotropy in the exchange-biased [Pd/Co]${\times}$5/FeMn multilayers with an out-of-plane anisotropy were investigated to determine the origin of perpendicular exchange biasing. As the Co thickness increased to 1.5 nm in the [Pd(0.8 nm)/Co(t)]${\times}$5/FeMn(120 nm) films, the hysteresis loops were converted from square loops at a thin Co (<0.4 nm) to complicated round ones at a thick Co. The irregularly asymmetric step (IAS) at the left top of the loop appeared in the loop of the 0.6-nm Co film due to an inhomogeneity in the exchange anisotropy. As the Pd thickness increased to 1.6 nm, the step disappeared, and the perpendicular magnetic anisotropy was maximized in the Co thickness between 0.6 and 0.9 nm. The conversion of the magnetization loop along the magnetization angle coincided with the equation $H_{(eff)}=H_o\;cos{\theta}$. The IAS of the 0.8-nm Pd film disappeared after thermal annealing up to $200^{\circ}C$ under an external magnetic field.

• Korean Chemical Engineering Research
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• 제47권5호
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• pp.615-619
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• 2009

$Tr{\ddot{o}}ger$'s base 중 (+)-$Tr{\ddot{o}}ger$'s base는 항혈전제로 Thromboxane A2($T{\times}A2$) Synthase의 효소 활성을 저해하여 동맥경화의 치료제로 널리 사용되고 있다. 따라서 (+)-$Tr{\ddot{o}}ger$'s base를 라세미 혼합물로부터 순수하게 분리하는 것은 중요한 연구대상이다. 하지만 실험을 통한 (+)-$Tr{\ddot{o}}ger$'s base의 순수한 분리에는 많은 시간과 비용이 필요하게 되므로 분리 효율의 향상에 많은 어려움이 있다. 이러한 단점을 보완하고자 Aspen Chromatography 전산 모사는 여러 조건하에서 직접 실험을 하지 않는 효율적인 시뮬레이션 방법으로서 분리 효율 등을 예측할 수 있으므로 생산성 향상에 드는 시간과 비용을 절약할 수 있다. Aspen Chromatography simulator로 $Tr{\ddot{o}}ger$'s base의 주입량과 이동상 속도를 변화시켜 TB(-)와 TB(+)의 분리도, 수율 그리고 다양한 흡착식을 비교하였다. TB(-)와 TB(+)의 분리도와 순수한 수율은 이동상 속도 0.25 mL/min일 때 가장 높았다. 고정상과 이동상 농도사이의 관계식을 표시하는 등온흡착식을 변화하여 전산모사한 결과 Ideal Adsorbed Solution(IAS) Statistical Langmuir 등온흡착식이 분리 효율에 좋은 결과를 가져왔다.

• Advances in pediatric surgery
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• 제4권2호
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• pp.93-99
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• 1998

Anal endosonography has recently been popularized in adult patients in order to access staging of rectal cancer and other lesions of the anorectum. This study is not familiar to pediatric surgeons. We performed anal endosonography in 30 children without anorectal disease in order to determine the standard morphology of the anorectum. The internal anal sphincter(IAS) was clearly identified as a homogeneous hypoechoic circular band, extending caudally to a level just proximal to the anal verge. The external anal sphincter(EAS) showed mixed echogenicity and different architecture along the anal canal; the EAS was U-shape in the upper canal and it had a circular pattern in the lower canal. In the upper canal of girls, the perineal body and the vagina were found just anterior of the anal canal, which made the U shape of the EAS. In the male, the sphincter tapered anteriorly into two arcs that met in the midline. The perineal body was prominent in the female. Posteriorly, the anococcygeal ligament was represented by a triangular shadow in both sex. The thickness of the IAS was measured in 3 directions, left, right and posterior, at 3 levels, upper, middle and lower areas of the anal canal. The average thickness was 0.86-2.40 mm between 6 and 18 months of age(Group 1), 0.88-3.20 mm between 19 and 36(Group 2), 1.07-2.20 mm between 37 and 54(Group 3) and 1.18-2.42 mm more than 54-month-old(Group 4). The thickness was correlated with the age of the children only in the right upper(p=0.008) and the left middle portion(p=0.015). We were able to obtain standard morphologic features of the normal anal canal in children with anal endosonography. We believe that this technique is a safe and an effective procedure to evaluate anorectal lesions in children.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.29-33
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• 2006

The potential impact of past Caribbean tsunamis generated by earthquakes and/or massive submarine slides/slumps, as well as the tsunamigenic potential and population distribution within the Intra-Americas Sea (IAS) was examined to help define the optimal location for coastal sea level gauges intended to serve as elements of a regional tsunami warning system. The goal of this study was to identify the minimum number of sea level gauge locations to aid in tsunami detection and provide the most warning time to the largest number of people. We identified 12 initial, prioritized locations for coastal sea level gauge installation. Our study area approximately encompasses $7^{\circ}N$, $59^{\circ}W$ to $36^{\circ}N$, $98^{\circ}$ W. The results of this systematic approach to assess priority locations for coastal sea level gauges will assist in developing a tsunami warning system (TWS) for the IAS by the National Oceanic and Atmospheric Administration (NOAA) and the Intergovernmental Oceanographic Commission's Regional Sub-Commission for the Caribbean and Adjacent Regions (IOCARIBE-GOOS).

• 한국물환경학회지
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• 제23권5호
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• pp.665-675
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• 2007

In-situ Air Sparging (IAS, AS) is a remediation technique in which organic contaminants are volatilized from saturated zone to unsaturated layer. This study focuses on the removal and interaction of Volatile Organic Compounds (VOCs) and $CO_2$, and Total Petroleum Hydrocarbon (TPH) in saturated and unsaturated, and air space zone on the unsaturated soil surface. Soil sparging temperature of hot air has risen to $34.9{\pm}2.7^{\circ}C$ from $23.0{\pm}1.9^{\circ}C$ for 36 days. At the diffusing point, fluid TPH concentrations were reduced to 78.7% of the initial concentration in saturated zone when hot air was sparged. The TPH concentrations were decreased to 66.1% for room temperature air sparging. The amount of VOCs for hot air sparging system, in air space, was approximately 26% larger than constant air sparging system. The amount of $CO_2$ was 4,555 mg (in unsaturated zone) and 4,419 mg (in air space) when hot air was sparged was 3,015 mg (in unsaturated zone) and 3,634 mg (in air space) for room air temperature in the $CO_2$ amount. The removals of VOCs and biodegradable $CO_2$ through the hot air sparging system (modified SVE) were more effective than the room temperature air sparging. The regression equation were $Y=976.4e^{-0.015{\cdot}X}$, $R^2=0.98$ (hot air sparging) and $Y=1055e^{-0.028{\cdot}X}$, $R^2=0.90$ (room temperaure air sparging). Estimated remediation time was approximately 500 days, if final saturated soil TPH concentration was set to 1.2 mg/L application of tail effect.