• Journal of Space Technology and Applications
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• v.3 no.3
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• pp.199-212
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• 2023

In contrast to the short-term nature of lunar missions in the past, lunar missions in new space era aim to extend the presence on the lunar surface and to use this capability for the Mars exploration. In order to realize extended human presence on the Moon, production and use of consumables and fuels required for the habitation and transportation using in-situ resources is an important prerequisite. The Global Exploration Roadmap presented by the International Space Exploration Coordination Group (ISECG), which reflects the space exploration plans of participating countries, shows the phases of progress from lunar surface exploration to Mars exploration and relates in-situ resource utilization (ISRU) capabilities to each phase. Based on the ISRU Gap Assessment Report from the ISECG, ISRU technology is categorized into in-situ propellant and consumable production, in-situ construction, in-space manufacturing, and related areas such as storage and utilization of products, power systems required for resource utilization. Among the lunar resources, leading countries have prioritized the utilization of ice water existing in the permanent shadow region near the lunar poles and the extraction of oxygen from the regolith, and are preparing to investigate the distribution of resources and ice water near the lunar south pole through unmanned landing missions. Resource utilization technologies such as producing hydrogen and oxygen from water by hydroelectrolysis and extracting oxygen from the lunar regolith are being developed and tested in relevant lunar surface analogue environments. It is also observed that each government emphasizes the use and development of the private sector capabilities for sustainable lunar surface exploration by purchasing lunar landing services and providing opportunities to participate in resource exploration and material extraction.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.1
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• pp.47-54
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• 2014

Endurance of ship hull can be estimated by existing regulations and fatigue estimation methods. These can be applied to the hull materials that are recommended by ship regulations but can't be applied to new materials. In this study, structural force in the worst sailing condition is obtained by the acceleration measurement test of small polyethylene boat and the endurance of small polyethylene hull is estimated by rainflow cycle counting method and linear cumulative damage rule. Maximum Von-Mises stress on the polyethylene boat is 1.8MPa and much lower than the fatigue strength of at least 5.9MPa for the fatigue life of $1{\times}10^9$ cycles. Fatigue life of the polyethylene boat hull is estimated to be 6,229 years.

• KDI Journal of Economic Policy
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• v.15 no.3
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• pp.53-93
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• 1993

본고(本稿)는 6.25전쟁(戰爭)이후 한국경제(韓國經濟)가 겪은 아홉번의 경기순환(景氣循環)으로부터 순환(循環)의 특징(特徵)과 양태(樣態)를 정리한 것이다. 경기순환(景氣循環)의 특징은 경기순환(景氣循環)의 지속기간(持續期間), 순환심도(循環深度), 변동성(變動性), 공행성(共行性) 및 시차성(時差性), 해외경기순환(悔外景氣循環)과의 관계(關係) 등 여섯가지 면에서 살펴보였으며, 순환양태(循環樣態)는 순환기별(循環期別)로 정리하였다. 우리 경제를 순환기별(循環期別)로 살펴볼 때 경우에 따라서는 경기과열(景氣過熱)을 식히기 위해 실시한 정책이 세계경제여건의 악화와 맞물려 경기(景氣)를 급냉(急冷)시킨 시기도 있었으며, 반대로 경기침체기(景氣沈滯期)에 도입한 내수부양정책(內需浮揚政策)에 기대와는 달리 경기(景氣)를 급격히 과열시켜 단기간내에 물가(物價)를 급등시키고 국제수지(國際收支)를 악화시킨 경우도 있었다. 경기조절(景氣調節)을 위해 실시한 정책이 자칫하면 서다가다(stop-go)를 반복하여 국민경제에 오히려 부담을 줄 가능성이 있기 때문에 정책결정자(政策決定者)는 항상 경기조절(景氣調節)을 위한 최적(最適)의 정책(政策)을 선택해야 하는 부담을 안고 있다. 특히 석유파동(石油波動)이나 UR타결과 같은 세계경제질서(世界經濟秩序)의 변동이 발생한 경우에는 가급적이면 그 충격(衝擊)이 경제에 서서히 흡수되도록 적절한 정책(政策)을 구사해야 한다. 경기정책(景氣政策)은 장기성장(長期成長)을 제고(提高)시키는 방향으로 전전되어야 하기 때문에 정책(政策)의 선택은 매우 산중하제 결정될 수밖에 없다. 또한 1953년 이후 지금까지 겪은 아홉번의 경기순환(景氣循環)과 각종 경기대책(景氣對策)의 실시 경험으로부터 정부(政府)는 추후 경기조절정책(景氣調節政策)의 시행과정에서 불가피하게 야기되는 문제점을 극소화하고, 정책목표 달성의 효율성(效率性)을 제고(提高)하기 위해서 민간(民間)에 대한 대정부(對政府) 신뢰성(信賴性)을 쌓아 나가야 할 것이다.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.44 no.2
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• pp.172-180
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• 2016

A cubesat classified as a pico-satellite typically uses commercial-grade components that satisfy the vibration and thermal environmental specifications and goes into mission orbit even after undergoing minimum environment tests due to their lower cost and short development period. However, its reliability exposed to the physical environment such as on-orbit thermal vacuum for long periods cannot be assured under minimum tests criterion. In this paper, we have analysed the reliability and life prediction of the failure mechanisms of the cubesat mission board during its service life under the launch and on-orbit environment by using the sherlock software which has been widely used in automobile fields to predict the reliability of electronic devices.

• Journal of the Korean Geotechnical Society
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• v.31 no.9
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• pp.5-15
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• 2015

In this study, rainfall-induced slope stability and coupling effect are investigated using hydro-mechanical finite element model. This model is developed by formulating constitutive and coupled balance equations and is verified by comparing the numerical results with field matric suction. The homogeneous soil layer (soil column) and soil slope are modeled by this model, and the results of variation in matric suction, mean effective stress, porosity, displacement, factor of safety are compared with those of staggered analysis. It is found that the vertical and horizontal displacement from coupling analysis considering change in porosity is larger than that of staggered analysis. The displacement and matric suction from coupling analysis by rainfall infiltration can affect slope instability, which shows a progressive failure behavior. The lowest factor of safety is observed under short-term rainfall. This results confirm the fact that coupling analysis is needed to design soil slope under severe rain condition.

• Korean Journal of Psychosomatic Medicine
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• v.12 no.1
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• pp.3-14
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• 2004

In this article, the effects of stress on central nerve system and heart function and the concept of heart rate variability were reviewed. HRV(Heart Rate Variability), the periodical change of the heart rate, is indicated larger in the healthier because they respond flexibly to various sorts of facts influencing on HR. HRV analysis is largely composed of the time domain analysis and the frequency analysis. In the former the flexibility of heart function is analysed, while in the latter autonomic nerve function is examined, which is the degree of sympathetic and parasympathetic nerve activity and the state of balance. Furthermore, existence or nonexistence of disease and/or level of stress can be estimated by measuring the variability and normality of heart rate, and balance of autonomic nerve system, and through HRV biofeedback the symptoms of anxiety disorder or asthma can be reduced.

• Journal of the Korean Data and Information Science Society
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• v.28 no.3
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• pp.559-571
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• 2017

The purpose of this study was to identify the changes in the risk factors of metabolic disease by compliance rate and numbers of health behaviors performed in the people who voluntarily participated in the metabolic disease management program implemented in a public health care center. Data were collected from a total of 168 people, January to June of 2015. Data were analyzed by paired t-test and ANOVA with post hoc test. The compliance rates were about 62% and 66% at 3 and 6 months respectively after implementing the program. Although the numbers of health behaviors performed was small, the participants with high compliance rate had significantly lower risk factors of metabolic disease after 6 months. Therefore the compliance rate is critically important to manage metabolic disease and enhancing compliance rate of health behaviors should be developed and investigated in the future studies.

• The Journal of the Korea Contents Association
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• v.11 no.8
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• pp.142-149
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• 2011

This study analyzed the brand storytelling campaign of Pasteur drink-type yogurt 'Quebyon'. The basic idea of research comes from how unique brand name is able to success in Korean yogurt market. Pasteur storytelling campaign has focused on the product's branding and positioning. For analyzing the research, Brand Stewardship Model(BSM) which based on consumers' perspectives has been used. For successful storytelling campaign of Pasteur, strong brand name is needed. Pasteur has decided the brand name 'Quebyon' which means good movement of the bowels in accordance with the research results. And the positioning has been decided 'attack inside (the body) if it does not evacuate'. For powerful positioning, three criterions are decided. They are including harmony with the brand name, differentiation with competitors and easiness with memory. Finally, the Pasteur product dominates the Korean Bulgarian-style yogurt market. The success comes from the harmonizing of Quebyon yogurt's branding and positioning. In other words, the branding and positioning strategies were working effectively to the consumers. In conclusion, this study has proved why branding and positioning strategies are so important in brand storytelling campaign.

• Journal of Global Scholars of Marketing Science
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• v.5
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• pp.145-170
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• 2000

브랜드는 단순히 출처를 표시하고 품질을 보증하며 나아가 광고선전을 담당하는 기능을 하는 도구가 아니라 이를 바탕으로 기업에게 가치를 제공하는 매우 중요한 자산으로 부각되고 있다. 기업은 마케팅 활동을 통해 브랜드 이미지를 개발하고 소비자의 태도를 변화시키며, 자사의 브랜드자산을 증가시켜 브랜드의 시장성과를 높일 수 있을 뿐만 아니라 시장에 대한 진입 장벽 효과를 갖게 하고, 브랜드 탄력성을 높이는 등 전략적 가치를 보장받을 수 있다. 이러한 이유로 기업에 있어서 새로운 마케팅 전략의 수단으로 브랜드의 중요성이 높아지고 있으며, 또한 자사의 기업가치를 증대시키기 위해서는 강력한 브랜드자산을 창출하는데 전력을 다해야 할 것이다. 이러한 브랜드자산을 강화하기 위한 수단으로서의 브랜드인지도, 브랜드충성도, 지각된 품질, 브랜드 연상, 광고효과의 역할은 현재와 같은 글로벌 경쟁 시장상황에서 매우 의미가 있다고 본다. 특히 인터넷의 등장으로 더욱 가속화되고 있는 정보화시대에 있어서 광고의 역할이 많은 비중을 차지할 것으로 보인다. 본 연구에서는 브랜드인지도, 브랜드충성도, 지각된 품질, 브랜드연상, 광고효과가 브랜드자산 강화에 어느 정도의 영향을 미치는가를 연구하고자 한다. 그리고, 국내 중형승용차 시장에서 선두를 달리고 있는 현대의 소나타 브랜드에 대한 소비자들의 의식을 설문조사를 통하여 브랜드자산을 강화시키는 요인에 대한 영향을 실증 분석하였다. 본 연구의 결과를 토대로 한 브랜드자산에 대한 마케팅에 있어서 전략적 시사점은 다음과 같다. 첫째, 기업들은 자사의 브랜드인지도를 높여서 소비자의 마음속에 자사의 브랜드가 장기간 기억될 수 있도록 브랜드인지도에 대한 전략적인 관리가 요망된다. 둘째, 소비자들이 자사의 브랜드가 경쟁브랜드보다 더 강력한 연상이 형성되도록 집중적인 마케팅 노력을 기울여야 할 것으로 보인다. 셋째, 제품품질을 향상시켜 소비자들의 지각된 품질수준을 높이는 노력이 요구된다. 넷째, 주로 단기간 작용하는 광고의 긍정적 효과를 위해서는 지속적인 광고의 실행이 요망된다. 끝으로, 분석결과에서도 알 수 있듯이 브랜드충성도가 브랜드자산 강화에 결정적인 영향을 미치기 때문에 마케팅관리자는 마케팅조사를 통해 브랜드충성도의 변화를 추적하고, 자사 제품에 대한 반복구매 및 브랜드태도의 측정을 함께 실시하여 더 높은 브랜드충성도를 소비자들이 가질 수 있도록 전략적인 방안을 강구하여야 할 것이다. 본 연구에서 나타난 결과를 요약하면 브랜드충성도가 가장 많은 영향을 미치는 것으로 나타났으며, 브랜드연상, 지각된 품질, 광고효과, 브랜드인지도 순으로 모두다 영향을 미치는 것으로 나타났다. 따라서 기업에서는 브랜드자산을 강화하기 위해서는 5가지 요인들에 대해 체계적이고 보다 세밀한 관리방안을 수립하여야 할 것으로 판단된다.

• The Journal of the Korea Contents Association
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• v.15 no.6
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• pp.589-596
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• 2015

The purpose of this study was (1) to examine the present state of English education for the 2018 Pyeongchang Winter Olympics preparations, and (2) to identify the need for an English language training program for international sports events. With these goals in mind, the information was gathered from telephone interviews with educational administration officials who were responsible for international sporting events. For the survey, a total of twenty-six participants responded to a questionnaire designed to gauge their self-perceived English instructional needs for international sporting events. The principal results obtained from this study were: the Pyeongchang Organizing Committee for the 2018 Winter Olympic Games signed an agreement with an official supplier of language training services. In addition, Gangneung city is providing a 'Global Leaders' Academy' and English programs for taxi drivers and citizens. The result of the survey shows that the majority of participants reported that an English language training program is essential for international sporting events and it should be different from general English language education.