• Journal of IKEEE
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• v.14 no.3
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• pp.236-243
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• 2010

Power quality mitigation devices play an important role in lots of industrial segments. Although there were many devices available in the market, the selection of an appropriate device specially for voltage sags and interruptions mitigation has been a challenge in the utility and customer for several years. It usually depends on technical and economic characteristics of the device. Nevertheless, most mitigation method is selected by rule of thumb or empirical method. In this paper, the life cycle cost analysis for the probabilistic risk assesment of voltage sag mitigation method is performed using either the deterministic or probabilistic approach. The difference between a deterministic and a probabilistic cost analysis approach is illustrated with five different case studies. This paper not only provides a comparison of life cycle costing of various devices but it also indirectly shows the possible savings due to the mitigation of voltage sags in the form of a project balance chart.

• Journal of the Korean Society for Nondestructive Testing
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• v.22 no.3
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• pp.239-245
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• 2002

Many civil and infrastructures continue to be used despite aging and the associated potential for damage accumulation. Therefore, the ability to monitor the health of these systems is becoming increasingly important. The purpose of this paper is to propose a real-time health monitoring system of cable-stayed bridge, based-on non-destructive measurement. And also this paper focuses on the safety assessment for bridge from health monitoring system to accomplish this safety assesment. Using the proposed health monitoring system, it helps bridge maintenance and reduces the economic cost of a life-cycle costs. Also it give important data to develop the design and analysis method for cable-stayed bridges.

• Journal of Korean Society of Environmental Engineers
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• v.35 no.7
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• pp.464-471
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• 2013

In this study, the resource efficiency and future metal resource requirement in photovoltaic (PV) production system were evaluated by using material balance data and life cycle assesment (LCA) method. As a result, in the resource efficiency of ferrous and non-ferrous metal, lead and tin had higher resource efficiency than other materials in all PV systems (SC-Si, MC-Si, CI(G)S, CdTe). In the resource efficiency of rare metals, gallium and rhenium in silicon system and rhenium and rhodium in thin-film system ranked as the first and second high resource efficiency. In case of rare earth metal, gadolinium and samarium took higher resource efficiency. The results of the future metal resource requirement in PV systems showed that 2,545,670 ton of aluminium, 92,069 ton of zinc, 22,044 ton of copper, 1,695 ton of tin and 31 ton of nickel will be needed by 2030 in South Korea, except resource recycling supplement.

• Journal of Korean Society of Disaster and Security
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• v.5 no.1
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• pp.43-47
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• 2012

The asset management of infra facilities is a total framework for finally supporting a safe and comfortable service, which includes functions of supporting evaluation of condition and performance of infrastructures, making the decision method of repair or rehabilitation of deteriorated facilities, and lengthening the life cycle of structure through the decision of adequate cost and time of repair or reinforcement. In the range of the asset management, organization, human, the target, and information & data of company are included. Therefore, in this paper, appling the method of asset management analysis to the infra structures, the process of the risk assesment using BRE (Business Risk Exposure) and the basis of consisting ORDM (Optimized Renewal Decision-Making) are expressed.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.1
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• pp.143-151
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• 2017

Recently Korea has presented carbon emission reduce goal of 37% compare to BAU until 2030 according to Paris Agreement in order to correspond to climate change. For this, researchers need to study positively on construction industry that emit $CO_2$ of $3^{rd}$ volume of 28 industry classification. This study calculated environmental load by LCA using the road part except tunnel and bridge among national road cases completed already. After selecting representative type of large construction type based on environmental emission, earth works, drainage works and paving works took up 84%. And this study analyzed the environmental emission feature of each detail construction type after selecting representative type each detail construction type. Utilization of each construction type emission attribute to environmental load during national road construction, will be helpful in making decision of eco-friendly national road construction based on environmental emission.

• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.1 no.1
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• pp.51-61
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• 1995

This paper is discussed on the prospects of packaging industry and technologies of Japan for comming 21th century. It is clear that packaging industry depends on living style and social mechanizms. A trends of numerical consumption, amounts of money and composisition of packaging materials are one of a measure of development of packaging industry. Total consumption of packaging materials in Japan of 1965, 1980 and 1993 were $6,344.5{\times}10^3,\;15,898.7{\times}10^3\;and\;21,603.3{\times}10^3$ tons respectively and also, shipping money of packaging materials were $7,073{\times}10^{11},\;45,421{\times}10^{11}\;and\;63,902{\times}10^{11}$ yen, respectively. It is estimated from these data that the packaging industry is also increasing in future according of GNP of country. Compositions of packaging materials from 1965 to 1993, however, are somewhat changing according to development of new materials or social conditions such as platics packaging or wooden packaging materials. Technical forcasts of packaging industry are shown from view point of national living style, energy and resorces as well as environment of world based on forcasting committee of pulp & paper in Japan, report of research committee for the 21th packaging in JPI and materials of symposium in Kanagawa University in this paper. As a my conclusion, many functional packaging materials shall be developed in the future and accordingly Life Cycle Assesment plays a important role of packaging fields. Furthermore, I am estimating in future the new cellulosic materials such as nonwood fiber resources instead of paper, board, wooden containers and a part of plastic packaging materials shall be developed. This paper is constructed by three items as follow:

• Journal of the Korean Society for Marine Environment & Energy
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• v.16 no.3
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• pp.181-188
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• 2013

The increase of carbon dioxide ($CO_2$) emission is known as one of the major causes of global warming, and it has a strong influence on the global environment. Therefore many researchers and politicians have tried to regulate the $CO_2$ emission. In regards to the matter, the IMPACT (Inclusive Marine Pressure Assesment and Classification Technology) committee under the Japan Society of Naval Architects and Ocean Engineers (JASNAOE) has developed an inclusive environmental impact assessment index, so-called "Triple I(III)", in order to assess the environmental impact including economic factors due to the artificial development of marine. In this study, III was applied to compare between the environmental impact of $CO_2$ emitted by container vessels during their life-cycle period and economic benefit due to their operating. Furthermore, III was also applied to assess the comprehensive environmental impact for the cases with various capacities of container vessels and different sailing route. From the results, the case for shortening of the sailing route is more effective to get the advantageous assessment results of III than the case for varying the size of vessels.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.8
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• pp.3602-3610
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• 2013

The risk of failure in the development of modern weapon systems has been increasing as the demand on the capability and the resulting complexity of the weapons on the war fields are increasing drastically. The analysis of failure has indicated that the main causes can be the following: one is attributed to the unsatisfaction of the system operation concept; and the other is the use of premature technology. As such, DAPA in Korea is urging that the weapons systems development should meet the required operational capability (ROC) as a critical performance requirement. On the other hand, an approach to risk management is to use the technology readiness level (TRL) assessed for each individual technology alone. However, the method of TRL cannot assess the effect of integration between technologies and cannot be performed at system level, which is crucial to systems development. In order to improve the shortfalls, a concept of system readiness level (SRL) has been studied by introducing the technologies integration and also some forms of analysis of advanced degree of difficulty studied separately, but no model considering both of two reported yet. In this paper, under the framework of meeting the ROC, an improved SRL assessment model is presented, which is also considering the advanced degree of difficulty simultaneously. The application of the improved assessment method is discussed in connection with the life cycle of the weapon systems development in conformance with the ROC of DAPA.

• Korean Journal of Organic Agriculture
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• v.20 no.4
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• pp.503-518
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• 2012

Korean type of no-tillage cultivation method which was applied on this study used the ridge and the furrow and constantly recycling them as it was suitable for Korea's weather and farming conditions. This no-tillage cultivation was reported to have little negative impact such as reduction of production (Kwon et al., 1997). In addition, it was found to have a lot of benefits as it requires less agro-materials and energy costs as well as shortened working hours because tillage operation is not needed. (Yang et al., 2012). According to an analysis, no-tillage cultivation can reduce greenhouse gas emissions by $344.7kgCO^2$ (58%) in every 10a ($1,000m^2$) compared to ordinary pepper farming technique (Korea averages). Direct-indirect reduction effects from using fertilizer and using less amount of energy were 92% and 44% respectively both of which can be considered very high. Besides the direct effects of no-tillage cultivation, soil management using no-tillage technique raises carbon sequestration effect on soil as time goes on (West & Marland, 2002), that is why the technique is expected to have constant carbon emission reduction effect. For theses reasons, distribution and expansion of Korean type no-tillage cultivation are expected to play a role as major agro-green technologies for achieving our goal of reducing greenhouse gas emissions in agricultural sector.

• Journal of Korean Academy of Nursing
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• v.28 no.1
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• pp.81-92
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• 1998

This study is to define the caring experience of mothers with insulin-dependent diabetes mellitus children, by finding core category, contextual factors, ntervening factors, and the patterns of caring, and to velop a practice theory on it. Research method followed grounded theory methodology by Strauss & Corbin. Subjects were six mothers. whose children have had insulin-dependent diabetes mellitus for 4 months to 14 years by the interview time. They were selected by theoretical sampling. Data were collected from September, 1995 to January, 1996. Interview were done by long interview technique and observation. Each interview took 50 minutes to 2 hours. Content of interview was recorded and transcribed later. Based on the results of previous interview, content of next interview was planned until data reached to the saturation point. Results were as follows : One hundred and forty concepts were found. These concepts were grouped into thirty-three categories, and then to ten categories. Mothers with diabetic child were revealed to face “being overwhelmed by burden”. Overwhelming by burden is found to be progressed through the cycle production-coping-decrease or in crease process. Mothers showed four patterns of adaptation in caring the diabetic children. 1) If mothers felt large amount of overwhelming by burden because of difficulty of caring and unsympathizing but they had sufficient support, no condition of the child, and their coping mechanism was positive, most of them overcome with strong will, but some fell into burnout. 2) If mothers felt large amount of overwhelming by burden because of difficulty of caring, unsympathizing, insufficient support. serious condition of the child, and their coping mechanism was negative, they fell into burnout by coping with feeling. 3) If mothers felt small amount of overwhelming by burden because of little difficulty of caring and sympathizing, sufficient support. no serious condition of the child, but their coping was negative, most of them fell into burnout by coping with feeling, but some overcome. 4) If mothers felt small amount of overwhelming by burden because of little difficulty of caring and unsympathizing, sufficient support, no serious condition of the child, and their coping was positive, they overcome with strong will. On the basis of the above result, in order to help mothers take good care of their children, nursing assesment and intervention on life readjustment, and getting support should be required. Especially, through understanding mothers' personalities, individual support consistent with each of them should be required. Therefore education. counseling, mutual support and exchange of information will have to be accomplished.