• Journal of Korean Society of Environmental Engineers
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• v.31 no.8
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• pp.611-618
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• 2009

Road construction has been worked on by focusing on cost effectiveness such as the reduction of construction costs without understanding the natural environment and ecosystems. In addition, since ecosystems have been destroyed and the habitats of animals and plants have been isolated, wild animals have sought other habitats or have moved into isolated habitats. Thus, issues such as roadkills or the extermination of species are increasingly occurring. Based on this background, the development and application of a general assessment method need to be researched in order to verify whether or not spaces or habitats where animals can be inhabited and their species can be maintained exist. The purpose of this study is to develop an ecosystem map where a conservation value evaluation method considering the functions of an ecosystem where animals live as well as the naturalness of ecosystems is used and can be made into a drawing. The items applied to evaluate the habitat conservation values were naturalness, rarity, and functionality, and sub-items for evaluation were created. GIS as well as the evaluation items were used to create a digital map about the level of importance based on the evaluation criteria. The created digital map showed that it was not limited to the adjustment or distribution of the fauna and flora but was applicable for a general ecosystem evaluation method for the conservation of habitats. It is expected that the isolation of habitats would be able to be minimized if the digital map is used for road construction projects. The digital map is deemed to be able to be used for the construction of environmentally friendly roads, which will minimize the destruction of ecosystems and the isolation of habitats for creatures.

• Journal of the Korea Institute of Building Construction
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• v.21 no.5
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• pp.433-443
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• 2021

Value Engineering(VE) is an organized effort to create the most value through a functional analysis and creation of alternatives. Depending on the VE job plan, a VE Workshop must be performed in a certain place within a certain period of time. A VE Workshop, which is an organized activity that aims to create the best value through functional analysis and creation of alternatives, should be held in a certain place and at a scheduled time according to the VE job plan. In the Pre-Study, VE Study and Post-Study phases of VE, functional assessments, performance evaluations and idea evaluations are driven by variable management techniques and analysis methods, respectively. Generally, VE is executed for about 3 to 5 days in a particular place to create value. However, there are many problems associated with limiting all VE processes to a specific place and schedule. Moreover, in Korea, VE teams are required to finish all VE processes in a limited time because of the short duration of VE workshops, the necessity of which has been overlooked. Therefore, an efficient VE support system is required to resolve the problem of time and space limitations. In this study, a VE support system based on the Mobile environment was developed to support the VE Workshop process. This VE support system enables participants to review design documents, drawing sheets and all VE-related documents using mobile devices. After the Workshop, participants can conveniently rearrange the result(evaluation of function and ideas) at the workshop. Not only can the members of VE team can review the design documents, drawing sheet and all VE-related documents in the step before the workshop, but also the result(evaluation of function and ideas) of the workshop can be easily rearranged in the phase after the workshop under the developed supporting system using mobile devices.

• Korean Journal of Cognitive Science
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• v.30 no.3
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• pp.157-174
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• 2019

Motivation of human individuals to perform on intellectual tasks can be hampered by identity threat from intellectual machines. A laboratory experiment examined whether individuals' performance loss on intellectual tasks appears under human identity threat. Additionally, by affirming alternative attributes of human identity, researchers checked whether group-affirmation alleviate the performance loss on intellectual tasks. This research predicted that under high social identity threat, individuals' performance loss on the intellectual tasks would be moderated by valuing alternative attributes of human identity. Experiment shows that when social identity threat is increased, human individuals affirmed alternative human attributes show higher performance on intellectual tasks than individuals non-affirmed. This effect of human-group level affirmation on performance loss did not appear in the condition of low social identity threat. Theoretical and practical implications were discussed.

• The Korean Journal of Coaching Psychology
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• v.7 no.2
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• pp.21-46
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• 2023

The current study aimed to develop and evaluate the effectiveness of a group coaching program to improve college students' career exploration behaviors based on the self-affirmation theory. Participants were undergraduate students at a University in Seoul and volunteered in the program during the break. The group coaching program was conducted twice a week during three weeks, a total of six times, and each session lasted 2 to 2.5 hours. In this study, the effect of self-affirmation embedded in the group coaching program on various psychological variables and college students' career exploration behaviors were examined. A mixed-randomized analysis was conducted to compare the pre, post, and follow-up tests of the experimental, comparison, and no-treatment control groups, each consisting of 18 participants. The results showed that participants in the experimental group coaching condition showed more significant improvements in psychological resources, career self-efficacy, openness, problem-focused coping, and career exploration behaviors compared to the comparison and control groups, and these results were maintained even after the program ended. The implications of this study for coaching theory and practice, as well as limitations and future research directions, were discussed.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.47 no.11
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• pp.803-811
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• 2019

Water rocket is a non-chemical rocket mechanically powered by pressurized gas and liquid (water) propellants. Since water rockets share many engineering commonalities with liquid propellant rockets for space launch vehicles, it is as a education tool for rocket engineering. Present paper investigated the availability of water rocket as an engineering education model by surveying the history of water rocket and making examples from K-12 education, commercial products and club activities. Finally, a way of improvement is suggested for water rocket competitions make changes in the perception on water rockets by examining the limitations of present competitions.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.134-134
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• 2016

우리나라는 지역별 및 유역별로 강수량의 편차가 심하고 홍수기에 강수량이 편중되어 내리는 특징을 가지고 있다. 최근 몇 년간 발생한 이상기후에 의해 연평균 강수량이 크게 감소하였고 이는 겨울철에서 봄까지 용수이용에 많은 어려움을 주었다. 연중 안정적으로 물을 공급하기 위해서는 대량의 물을 저장할 수 있는 대규모 저수시설이 필요하지만 사회 환경적인 이견대립으로 이를 실행하기란 쉽지 않다. 따라서 구조적인 대책이전에 지역 및 유역의 특성을 고려한 실행단위의 수자원계획 수립과 평가할 수 있는 기반이 요구된다. 현재 국가 수자원의 안정적인 확보와 하천의 효율적 이용 개발 및 보전을 목적으로 수립되고 있는 수자원장기종합계획은 국가의 수자원정책을 반영하고 있으나 하천의 건천화, 수질부문에 대한 검토가 미비하고 수자원과 관련된 하위단위의 실행계획과 연계가 미흡한 실정이다. 국외의 수자원관리는 안정적이고 효율적인 수자원관리를 위해 통합관리체계를 도입하고 있으며 이에 하위관리단위인 유역단위에서 물과 관련된 많은 부분을 고려하여 통합관리를 위한 지침을 마련하고 있다. 지속적이고 안정적인 수자원 확보와 효율적인 이용을 위해 수자원 관리정책과 제도적인 틀을 마련하여 국가 및 지역의 수자원개발 및 이용계획을 지원하고 있다. 이러한 변화는 지금의 수자원이 미래에 사회 경제적으로 상당히 중요한 가치를 가진다는 것을 의미한다. 본 연구에서는 국내의 기 수립된 수자원계획과 국외의 수자원정책적인 부분을 살피고 국가차원의 수자원 관리를 지원할 수 있는 지역(유역관리)단위 계획수립과 이를 지속적으로 이끌어 갈 수 있는 중앙 정부, 지방정부, 시민단체 등과 같은 지역거버넌스의 협력적 관계조성을 기반으로 세부적인 부분에서 출발하는 수자원관리계획에 대한 필요성을 제시하였다.

• Korean Chemical Engineering Research
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• v.57 no.4
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• pp.484-491
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• 2019

An efficient propylene/propane separation technology is needed to obtain high-purity propylene, which is a raw material for polypropylene synthesis. Since conventional cryogenic distillation is an energy-intensive process due to the similar physicochemical properties of propylene and propane, adsorptive separation has gained considerable interest. In this study, we have computationally investigated the changes in adsorption separation performances by arbitrarily controlling the adsorption strength of open metal sites in two different types of metal-organic frameworks (MOFs). Through the evaluation of adsorptive separation performances in terms of working capacity, selectivity, and Adsorption Figure of Merit (AFM), we have suggested proper density and strength of adsorption sites as well as appropriate temperature condition to obtain optimal propylene/propane adsorptive separation performances.

• Proceedings of the Korea Water Resources Association Conference
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• 2020.06a
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• pp.348-348
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• 2020

우리나라 하구에 조성된 담수호의 수자원은 다양한 용수 목적에 맞게 활용하고 있으며, 수질 기준에 부합하는 용수를 공급하고 담수호 및 간척지의 친환경적 가치를 높이기 위해서는 담수호의 상류 유역 및 유입 오염물질, 그리고 담수호 수체 특성에 대한 종합적인 이해를 기반으로 수질 오염 관리 대책을 수립하는 것이 중요하다. 일반적으로 담수호 개선을 위한 방안의 선정 방식은 연평균 수질 농도를 기준으로 목표하고자 하는 수질 기준의 만족 여부에 대한 평가와 경제적 평가를 함께 고려하여 최적의사결정 기반으로 주로 이루어져 왔다. 그러나 기존의 평가 방법에서는 목표 수질의 만족 여부가 중요하다는 점에서 담수호 수자원의 시기별 활용성에 대한 고려를 간과하기 쉽다. 또한 담수호 수자원 시스템의 수질 악화에 대한 회복탄력성을 높이는 일은 단순히 유역관리대책의 적용에 따른 수질 개선 문제와는 별도로 담수호 수자원 시스템의 지속 가능성과 연관된다는 점에서 기존의 평가 방식을 보완하기 위한 수단이 필요하다고 할 수 있다. 따라서 본 연구에서는 담수호 수자원 관리 방안을 평가하는 데 있어서 회복탄력성의 개념을 활용하였으며, 각 방안에 대한 시간적 변화에 따른 담수호의 회복탄력성 특징을 고려하기 위하여 동적 회복탄력성 개념 및 평가 방법을 도입하였다. 본 연구에서는 우선 기존의 수질 평가 방법에 따라 간월호를 대상으로 수질 개선 방안별 수질 변화를 SWAT-EFDC 연계모형을 통해 모의하고, 연평균 수질 농도와 총인 삭감량에 대해 분석하였다. 분석 결과, 간월호의 지형학적 특성에 따라 간월호 상류 구간의 수질 농도가 다른 구간에 비해 높게 나타났으며, 상류 구역의 경우 준설 시나리오만으로는 목표 수질을 달성하기 어려운 것으로 나타났다. 따라서, 상류 구역의 수질 목표 달성을 위해서는 준설 시나리오만으로는 한계가 있으므로 상류 유역 출구부에 위치한 하수처리시설의 총인 배출부하량을 삭감과 추가적인 유역 수질 관리 대책이 필요하다.

• Journal of Energy Engineering
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• v.23 no.1
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• pp.21-32
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• 2014

This study has analyzed whether the virtuous cycle of value-added between the processes within the company has formed and whether the virtuous ecosystem between the processes within the industry has been built through the analysis of value chain(VC) and value system(VS) targeting the Korean photovoltaic companies. For a study method, after conducting a survey on the companies, a regression analysis was performed on the causal relationship between the process within the VC and VS. Based on the results of the analysis, for the VC of the Korean photovoltaic industry, an increase in the R&D support from the government has led to the increase in the investment of R&D for the related industry, and the increase in the investment of R&D has contributed to the increase in the growth of its productivity, and the growth in the productivity of R&D has influenced the increase in the production of solar products. In addition, the reduction of photovoltaic production cost for the company has influenced the increase of recurring profit margin compared to the sales. However it was shown that the increase in the company's production volume does not contribute to the reduction of production cost. Meanwhile, the increase in recurring profit margin compared to the sales were influencing the increase in the production volume but it was shown that the increase in the company's investment of R&D was not a contributing factor thus it was not included in the virtuous cycle. It was analyzed that the VS was shown not to influence all other processes within the industry except for the module companies where the increase in the recurring profit margin compared to the sales was influenced by the increase in the recurring profit margin compared to the sales of solar cell companies. This shows that the virtuous industrial ecosystem which should be made under the mutual cooperation by the ingot, wafer, solar cell, module and system companies are yet incomplete.

• Korean Journal of Breeding Science
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• v.49 no.3
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• pp.170-179
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• 2017

Plant molecular farming has attracted a lot of attention lately in the field of mass production of industrially valuable materials by extending application of the plant as a kind of factory concept. Among them, protein expression system using rice(Oryza sativa L.) callus is a technology capable of mass culture and industrialization because of a high expression rate of a target protein. This study was carried out to develop an Agrobacterium-mediated transformation system to increase the utilization of rice callus. The transformation efficiency was improved by using the hand when seeds were de-husked for callus induction. Furthermore, we were possible induction of callus from 6 years old seed smoothly. Selection of the callus contained the target gene was required a cultivation period of at least 3 weeks, and the most efficient selection period was after 6 weeks of culture including one passage. This selection was confirmed that the gene was stably inserted into the genomic DNA of the plant cell by the southern blot analysis and progeny test. Such an efficient selection system of rice callus that can be cultured in the long term will be contribute to the industrialization of useful recombinant proteins using rice.