• Journal of the Society of Naval Architects of Korea
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• v.49 no.4
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• pp.287-295
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• 2012

Hydrodynamic performance of a movable submerged breakwater was analyzed using energy dissipation model. Based on two-dimensional boundary element method the equation of motion including a viscous dissipation term proportional to velocity squared was solved by Newton-Raphson method. Energy dissipation coefficients as well as reflection and transmission coefficients of a submerged flat plate were calculated with various plate lengths and thickness. Both real and imaginary components of body displacement and forces were used to solve the motion of breakwater accurately. The effect of the magnitude of dissipation coefficient on the body displacement was evaluated. The results from the potential theory with no dissipation term were found to be an overestimate in resonance frequency.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2013.04a
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• pp.134-135
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• 2013

2008년 숭례문 화재 이후 국가지정 중요목조문화재에 소화전, 방수총, 감지기, CCTV, 자동화 재탐지설비 등 수많은 방재시설이 설치되었다. 그러나 설치 및 관리에 대한 기준이 없어 안전관리에 많은 문제점이 나타나고 있다. 또한 문화재의 특수성을 고려한 별도의 법률이 아닌 소방시설설치 및 유지관리에 관한 법률에서 특정소방대상물로 분류되어 소방법의 적용을 받고 있는 현실이다. 따라서 본 연구에서는 전국에 위치한 159개 국가지정 중요목조문화재 현장조사를 통하여 방재시설 실태를 알아보고 소방시설 설치 및 관리기준 마련의 필요성을 알아보고자 한다.

• Knowledge Management Research
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• v.12 no.4
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• pp.91-119
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• 2011

Compared to the industrial society, the knowledge-based economy of the 21st century has placed importance on intellectual capital as a sustainable competitive advantage of an organization. The ownership, creation, and interaction of intellectual capital is emerging as the main challenges of the management and, moreover, it might extend to the issue of intellectual capital management. This research found that the exploitation and sharing of knowledge was more efficient in a networked organization through a case study for A research institute, which attempted intellectual capital management domestically for the first time. The contribution of this exploratory research is to suggest new perspectives on the ownership of intangible asset, the evaluation of knowledge-based product, and the competitive advantage and complementarity of an organization in the knowledge-based economy. The limitation is that this research is just exploratory due to the inaccessibility of data. If the intellectual capital management would be more common, the diverse researches should be empirically carried out.

• Journal of the Society of Naval Architects of Korea
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• v.47 no.3
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• pp.369-376
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• 2010

In this study, a radiation and a diffraction problems of a floating body in two-layer fluids were solved by the Numerical Wave Tank(NWT) technique in the frequency domain. In two-layer fluids, two different wave modes exist and the hydrodynamic coefficients can be obtained separately for each mode. The two-domain Boundary Element Method(BEM) in the potential fluid using the whole-domain matrix scheme was used to investigate the characteristics of wave forces, added mass and damping coefficients. The effects of the ratio of density and water depth in the lower domain were also evaluated and compared with given references.

• Journal of Korean Society of Water and Wastewater
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• v.26 no.6
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• pp.735-745
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• 2012

Storage method is one of major measures for reduction of CSOs pollutant loads and several projects have been done nationwide. But systematic analysis of intercepting capacity has not been studied to determine optimum size of storage facility. In this research, not only storage volume but also intercepting capacity which means flow capacity from intercepting facility to CSOs storage facility was studied and optimum sizing method for storage facility was proposed. The result shows that pollutants reduction efficiency can be increased significantly by increasing intercepting capacity and it might reduce storage volume and total construction costs. Intercepting capacity for the study area was evaluated and it was shown as equivalent to 83 % probability rainfall intensity.

• Proceedings of the KIEE Conference
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• 2003.10a
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• pp.57-59
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• 2003

PLS에 사용되는 반사판의 반사율과 300도의 열적 안정성을 높이기 위해 두 충의 투명 산화막이 Al기판위에 증착된 Al 필름 위에 증착되었다. 광학적 고려를 위해 낮은 굴절률은 가진 $SiO_2$와 치밀하고 높은 굴절률을 가진 $SiO_2-CeO_2$ 복합 산화물이 IAD 방법에 의해 증착되었다. 복합 산화물의 조성에 따른 굴절률 변화로부터 보다 치밀한 구조를 갖는 조성이 결정되었으며 이와 더불어 엔드홀 이온 소스에 의한 조사를 통해 Al 필름 보다 높은 반사율과 열적 안정성을 얻을 수 있었다.

• Journal of Korean Society of Disaster and Security
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• v.7 no.2
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• pp.35-41
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• 2014

If a disaster occurs in the underground like subway, disaster response system should minimize the casualties. It must quickly guide passengers to a safe evacuation route. But sometimes the system does not work properly. And then they need distributed disaster response system which make decision autonomously. We perform conceptual research about distributed autonomous decision-making disaster detection and response system and disaster detection method.

• Journal of Korea Technology Innovation Society
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• v.8 no.1
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• pp.51-76
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• 2005

This paper aims to develop the intellectual capital (IC) indicators which are the most available for the E institution, a typical type of public research institute in Korea. In this paper, we basically adopted the "Intangible Assets Monitor" proposed by Sveiby and comprising three kinds of intellectual capital, namely human capital, internal structure capital and relationship capital, as a research framework. For this work, we firstly identified 12 categories and 27 components of intellectual capital for E institution. Next, we extracted 37 main indicators and 94 sub ones from these categories and components as a whole. As a result, it may be the first time in Korea for E institution of develop its own IC indicators which are slightly, or sometimes totally, different from ones for private companies in the perspective of their organizational attributes and characteristics.

• The Journal of the Korea Contents Association
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• v.7 no.2
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• pp.212-221
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• 2007

Local festival can be defined as the essence of the local culture as it represents the lifestyle and culture of the people in the community intensively and implicatively. The local festival actives the regional economy, enhances the community image, harmonizes the community residences, and gives the good opportunity for the education of the culture mind. The ways in which the local economy can be activated through the festival are to find a way to get in goals, to use the characters of the Cheongju region in creating a brand and products for the festival.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2003.10a
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• pp.587-590
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• 2003

Wetland systems are widely accepted natural water purification systems around the world in nonpoint sources pollution control. In this study, the field experiment to reduce nonpoint source pollution loadings from agricultural drainage and polluted stream waters using wetland and pond system was performed. The removal rate of $BOD_5$, TSS, T-N and T-P during growing season was 7.2%, 64.3%, 57.0%, and 60.3%, respectively. And removal rate of $BOD_5$, TSS, T-N and T-P during winter was -49.5%, -56.1 %, 30.5%, and 47.1%, respectively. In this study, pond-wetland system is more effective than wetland-pond system to remove nutrient.