• 한국미생물·생명공학회지
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• 제7권4호
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• pp.205-209
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• 1979

두유에서의 유산균 생육과 산생성량을 높일 수 있는 조건을 검토한 것을 요약하면 다음과 같다. 1. 유산균 Str. thermophilus, L. acidophilus, L. bulgaricus, 그리고 L. helveticus중에서 L. acidophilus가 두유에서의 생육이 가장 우수하였다. 2. 두유에 glucose, lactose 또는 sucrose를 각각 첨가했을 때 glucose의 첨가가 가장 L. acidophilus의 생육과 산생성에 효과가 있었다. 3. 우유보다 두유의 부족 필수아미노산인 methionine을 두유에 첨가했을 때 L. acidophilus의 생육과 산생성량을 상승시켰다. 4. 두유의 protease 처리는 L. acidophilus의 생육과 산생성을 크게 향상시켰고 산도는 비처리구보다 2배 이상 증가되었다.

• 환경위생공학
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• 제17권3호
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• pp.75-82
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• 2002

This outline survey of indoor and outdoor radon concentrations in five major cities in Korea was carried out with Electrostatic Integrating Radon Monitor(EIRM) from February to December, 1996 and January to december, 1998. The mean indoor and outdoor radon concentrations in five major cities in 1996 were $21.9{\;}Bq/\textrm{m}^3$ and $9.6{\;}Bq/\textrm{m}^3$, respectively. The mean indoor and outdoor radon concentrations in 1998 were $20.8{\;}Bq/\textrm{m}^3$ and $9.0{\;}Bq/\textrm{m}^3$, respectively. These were below the U.S.EPA radon action level. The range of indoor to outdoor radon concentrations were $0.8{\;}Bq/\textrm{m}^3{\;}~{\;}45.6{\;}Bq/\textrm{m}^3$ in 1996, $0.5{\;}Bq/\textrm{m}^3{\;}~{\;}15.2{\;}Bq/\textrm{m}^3$ in 1998, respectively. The result of our analysis showed that radon concentrations in indoor air were clearly higher than those in outdoor air. Inspection of seasonal distribute pattern indicates the enhancement during winter relative to summer.

• International Journal of Internet, Broadcasting and Communication
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• 제9권3호
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• pp.44-58
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• 2017

The purpose of this study is to prove the Korean Internet company, Kakao's resilience capacity. For it, this paper reviews the previous literatures regarding Kakao's business models and discusses 'resilience' theory. Then, it organizes the research questions based on the theoretical background and explains the research methodology. It investigates the case of Kakao's business and organization. The case analysis shows that five levers of resilience are a good indicator for a successful platform business evolution. The five levers are composed of coordination, cooperation, clout, capability, and connection: First lever, coordination that makes the company to restructure its silo governance in order to respond to actual business flow starting from the basic asset like game and music content; second lever, cooperation where the firm provides creative people with playground for startups such as KakaoPage; third lever, clout where the company shares its data by opening its API of AI and chatbot to $3^{rd}$ party developers; fourth lever, capability where the firm establishes AI R&D center, KakaoBrain as the function of multi-domain generalist for developing diverse platforms tackling customer needs; and the last fifth lever, connection where the firm continues to expand its platform business to the peripheries, O2O businesses such as KakaoTaxi, KakaoOrder, KakaoPay, and KakaoBank. In conclusion, this study proposes Internet companies to be a resilient platform utilizing those five levers of resilience in order to form successful platform. This study contributes to the agile innovation of Internet platform with ecological sense.

• International Journal of Advanced Culture Technology
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• 제9권3호
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• pp.181-187
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• 2021

According to Joseph Campbell, there is always a similar pattern in the hero myth, which is called hero's journey. The legends about Cuchulain, the great Irish warrior, also follow this pattern. W. B. Yeats adapts the legends into his plays with Cuchulain as the protagonist. This paper discusses the protagonist's heroic journey in the five Cuchulain plays written by Yeats. In the five plays, Cuchulain grows, matures, weakens, dies, and resurrects, completing and meanwhile sublimating his heroic journey. In At the Hawk's Well, Cuchulain shows potential qualities of a hero. The Green Helmet displays his self-growth through the depiction of his heroic merits which make him a true hero. In On Baile's Strand, the hero suffers from the major frustrations and tribulations in his heroic journey and is stricken down consequently. The Only Jealousy of Emer reflects the hero's inner struggle and vulnerability. The last play, The Death of Cuchulainn, marks the end and reincarnation of the hero's life. Through the depiction of Cuchulain's heroic journey in the five plays, his heroic qualities are well demonstrated. Meanwhile, Yeats's views of heroism can be found as well.

• The Journal of Asian Finance, Economics and Business
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• 제7권9호
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• pp.781-790
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• 2020

This study's primary purpose is to explore the psychological capital roles and personality traits of Big-Five in predicting OCB (organizational citizenship behavior) and performance of task in Indonesia's electricity sector. The data were gathered from the employees of four major cities in Indonesia, in Southeast Sulawesi, comprising 246 employees. The data were analyzed utilizing a PLS (partial least squares) based SEM (structural equation modeling) technique. The findings indicate that the psychological capital and personality traits of Big-Five relate significantly to OCB and the performance of task. Nevertheless, against our expectations, OCB does not significantly relate to the performance of task. This study also discusses the findings' further implications. In terms of practical implications, the findings of this research stipulate that psychological capital and Big-Five personality traits aimed to improve employee performance and can be most effective if specifically targeted at OCB. Given that both variables play an important role to promote OCB, caring training initiatives that focus on mutual help can be very valuable for organizational improvement. In a managerial perspective, organizations can increase OCB by conducting open communication strategies between managers and employees to further stimulate and strengthen the ability of employees to display extra-role behaviors.

• 한국콘텐츠학회논문지
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• 제9권4호
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• pp.323-330
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• 2009

본 연구는 DEA 기법과 Malmquist Index를 이용하여 2003년 방카슈랑스 제도 도입 이후인 2004년부터 2007년까지의 생명보험 회사들의 효율성과 생산성 변화를 측정하는 것이다. 본 연구결과는 다음과 같다. 첫째, CCR 효율성은 기술효율성을 나타내는데, 2004년의 CCR 효율성 결과를 살펴보면 CCR 효율성이 1인 생명보험회사는 19개 생명보험 회사 가운데 6개 회사, 2005년은 5개 회사, 2006년에는 4개 회사, 2007년에는 7개 회사로 나타났다. 둘째, BCC 효율성은 순수기술효율성을 나타내는데, 2004년의 경우 BBC 효율성이 1인 생명보험회사는 19개 생명보험회사 가운데 8개 회사, 2005년도에는 9개 회사, 2006년도에는 10개 회사, 2007년에는 12개 회사로 나타났다. 셋째, 규모의 수익가변과 관련하여 DRS는 규모의 감소를 통해, IRS는 규모의 증가를 통해 효율성 개선이 가능하다. 2004년의 경우 DRS는 9개 회사, IRS는 2개 회사, 2005년도에는 DRS는 5개 회사, IRS는 5개 회사, 2006년에는 DRS는 5개 회사, IRS는 4개 회사, 2007년은 DRS는 5개 회사, IRS는 2개 회사로 나타났다. 넷째, Malmquist Index를 통한 생산성 변화를 살펴보면 2004년부터 2005년까지의 평균이 1.12로 1보다 크므로 생산성 향상이 이루어졌으나 2005년부터 2006년까지의 평균은 0.97로 1보다 작으므로 생산성 감소로 나타났다. 2006년부터 2007년까지의 평균은 1.05로 1보다 크므로 생산성 향상이 이루어졌음을 알 수 있다.

• 한국환경생태학회지
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• 제30권5호
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• pp.908-914
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• 2016

우리나라 유아교육현장에서 자연친화 교육에 대한 관심이 높아지고 자연체험 프로그램에 대한 요구가 증가하고 있다. 본 연구에서는 숲이 가지고 있는 산림치유인자들과 요인들을 활용하는 숲에서의 오감체험활동이 유아의 자아효능감과 생명존중인식에 미치는 영향을 알아보고자 하였다. 실험대상은 청주시 OO동에 위치한 유아교육기관의 숲특별반을 주2회 참여하는 실험군과 통제군은 숲활동을 하지 않고 유아교육기관에서 운영하는 프로그램에 참여하는 만 5세 유아 남녀 각각 20명으로 하였으며 남자아이는 11명, 여자아이는 9명씩이었다. 실험기간은 2016년 8월08일부터 2016년 9월20일까지 매주 2회씩 12회기로 1시간 (60분)씩 실시하였다. 오감체험활동은 숲에서 유아들이 오감을 깨우고, 오감을 통해 계절의 변화를 알고, 자신의 자아를 확립하고 자연과 친해지는 활동이다. 프로그램 실시 전후에 유아를 대상으로 한 자아효능감 검사와 생명존중인식검사를 실시하고 그 자료는 SPSS 18.0 로 분석하였다. 그 결과 긍정적인 생각과 자신감을 나타내는 자아효능감, 자연과 함께 더불어 살아가며 생명을 존중하는 생명존중인식이 통계적으로 유의미하게 향상되었다(p<0.05). 오감체험활동을 통해 유아들은 온몸으로 자유롭게 자연을 마음껏 느낄 수 있었고, 교실에서 이루어지는 활동에 비해 자아효능감이나 생명존중인식에 긍정적인 영향을 주는 것으로 나타났다.

• 한국철도학회논문집
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• 제14권2호
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• pp.87-93
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• 2011

본 연구는 Five-9's 가용도를 달성하기 위한 고가용도 시스템의 가용도 모델을 기술한다. 현대의 철도시스템은 지속적으로 서비스가 제공되어야 하는 고가용도 시스템으로 이러한 고가용도 서비스의 중요한 특성은 이동통신, 철도시스템, 정보운영 및 웹기반 사업 등 많은 현대의 사업에 필수적이며, 아키텍처 기반의 시스템 가용도 모델은 고가용도 목표의 만족여부를 평가하는 데 매우 유용하다. 마코브 모델 접근은 관련 시스템엔지니어가 시스템고장 및 고장복구 프로세스를 모델링할 때 직관적으로 적용가능하다. 본 연구는 UML2.0을 사용하여 개선된 가용도 모델을 제시하였다. 이러한 아키텍처기반의 시스템 가용도 모델은 철도시스템에 매우 의미있게 적용될 수 있다.

• 한국환경과학회지
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• 제12권9호
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• pp.935-941
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• 2003

To investigate the interaction of bacteria and Microcystis isolated from a hypertrophic reservoir(Seo-Nakdong River), the response of five bacteria in relation to the different treatment of Microcystis and microcystin production by addition of dominant bacteria Staphylococcus sciuri were examined. Five bacteria (S. sciuri, S. capitis, S. epidermis, Pseudomonas aeruginosa and Aeromonas aimonicida) were identified from the reservoir. In the experiment of bacterial response, two types of bacterial growth pattern were observed. All bacteria showed active growth in heated Microcystis-added media. Especially, three species of bacteria (S. sciuri, S. capitis and P. aeruginosa) among them showed active growth in live Microcystis-added media. In Microcystis response, increase of microcystin production showed when dominant bacteria, S. sciuri was added.

• 한국멀티미디어학회논문지
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• 제24권9호
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• pp.1299-1310
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• 2021

Under the background of the rapid development of digital educational games, we have to evidently research the elements of the achievement system of children's DEG (Digital Educational Game), and analyze the relations between the elements and make a profound study on the achievement system and its components on the impact of player's attitude. Compared with the existing research, the research contents and methods are innovative and reliable. The results show that players have a positive attitude towards the DEG achievement system, DEG achievement system has important value and role for educational games. Which is made of five elements: symbol, reward, logic, social interaction, and knowledge. The five elements interact with each other and have a positive impact on players' attitudes. DEG achievement system with five elements will bring players a positive experience. These findings provide a detailed study of the components of the achievement system. With all of these, we can explain the role and relationship of the components, and provide new ideas and empirical evidence for the design and development of children's educational game achievement system. The above findings provide a detailed description of the components of the DEG achievement system, explain the role and value of each component, and the relationships and patterns among the components, it provides a new perspective and empirical evidence for the design and development of the children's system DEG results.