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Jongbin Im,Sunyang Chung 세계과학도시연합 2015 World Technopolis Review Vol.4 No.3
Globalization and knowledge-based economy have increased the importance of local areas as the units of global competition. Therefore, the meaning of localities has been emphasized as the core value of economic activities. In this context, innovation cluster has been recognised and emphasized as effective policy measure for innovation. Therefore, most countries have been trying to develop innovation clusters with their expectation for a rapid growth of economy. Nevertheless, there have been minimal empirical researches on innovation cluster. Therefore, for suggesting implications that activation factors of innovation cluster are to have an effect on tenant's business activities, this study conducted a literature review for the theories of regional innovation system(RIS) and innovation cluster. As a result, the activation factors of innovation cluster were classified into institutional, physicals, and social factor. The case of Gyeonggi province's innovation cluster policy was examined for an empirical analysis. Data were analyzed using ordered logistic regression. The results were as follows:First, Institutional and Infra factors had a positive influence on firms' business activities in every empirical test, so they were the most important activation factors of innovation cluster. Second, regarding the interactive effects of financial support, the interactive effects between financial support and Infra factor had a positive influence on the firms' business activities, according to the result of the empirical test.
Residual stress behaviors induced by laser peening along the edge of curved models
Jongbin Im,Ramana V. Grandhi,Younghee Ro 대한기계학회 2012 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.26 No.12
Laser peening (LP) induces high-magnitude compressive residual stresses in a small region of a component. The compressive residual stresses cause plastic deformation that is resistant to fatigue fracture. Fatigue cracks are generally nucleated at critical areas, and LP is applied for those regions so as to delay the crack initiation. Many critical regions are located on the edge of the curved portion of structures because of stress concentration effects. Several investigations that are available for straight components may not give meaningful guidelines for peening curved components. Therefore, in this paper, we investigate residual stress behaviors induced by LP along the edge of curved models. Three curved models that have different curvatures are investigated for peening performance. Two types of peening configurations, which are simultaneous corner shot and sequential corner shots, are considered in order to obtain compressive residual stresses along an edge. LP simulations of multiple shots are performed to identify overlapping effects on the edge portion of a curved model. In addition, the uncertainty calculation of residual stress induced by LP considering laser pulse duration is performed.
Im, Jongbin,Chung, Sunyang World Technopolis Association 2015 World Technopolis Review Vol.4 No.3
Globalization and knowledge-based economy have increased the importance of local areas as the units of global competition. Therefore, the meaning of localities has been emphasized as the core value of economic activities. In this context, innovation cluster has been recognised and emphasized as effective policy measure for innovation. Therefore, most countries have been trying to develop innovation clusters with their expectation for a rapid growth of economy. Nevertheless, there have been minimal empirical researches on innovation cluster. Therefore, for suggesting implications that activation factors of innovation cluster are to have an effect on tenant's business activities, this study conducted a literature review for the theories of regional innovation system(RIS) and innovation cluster. As a result, the activation factors of innovation cluster were classified into institutional, physicals, and social factor. The case of Gyeonggi province's innovation cluster policy was examined for an empirical analysis. Data were analyzed using ordered logistic regression. The results were as follows:First, Institutional and Infra factors had a positive influence on firms' business activities in every empirical test, so they were the most important activation factors of innovation cluster. Second, regarding the interactive effects of financial support, the interactive effects between financial support and Infra factor had a positive influence on the firms' business activities, according to the result of the empirical test.
임종빈(Im, Jongbin),이준(Lee, Joon),임창호(Lim changho),정서영(Chung, Soyoung),박정호(Park, Jungho),김은정(Kim, Eunjeong),최남미(Choi, Nammi) 한국항공우주연구원 2015 항공우주산업기술동향 Vol.13 No.2
세계적으로 우주개발에 대한 필요성이 증가하고 있으며, 이에 따른 많은 국가들이 새롭게 우주개발에 참여하고 있다. 천만 달러 이상을 우주개발에 투자하고 있는 나라는 2014년 60개국으로 이는 2004년에 비해 두 배 증가한 수치이다. 하지만 2013년도 세계 정부의 우주개발 예산이 약 20년 만에 처음으로 줄어들었는데, 이러한 현상이 2014년도에 이어졌다. 이는 미국의 예산 감소와 환율의 영향이 큰 것으로 보인다. 그럼에도 불구하고 향후 10년간 세계 정부의 우주개발 예산은 다시 증가할 것으로 예측되고 있다. 본 연구에서는 이러한 세계정부의 우주개발 투자 현황을 자세히 살펴보고자 한다. The number of countries involving in space development increases. In 2014, 60 countries invested more than 10 million dollars in space applications and technologies, twice as countries as in 2004. In 2013, for the first time in almost 20 years, government worldwide reduce spending on their space programs. This downward trend was confirmed in 2014. The main factors to reduce expenditures for space programs are U.S. military space expenditures dropping, exchange-rate fluctuation and pressures on government spending. However, a new growth cycle is expected to start with anticipated growth of government space spending over the next ten years worldwide. In this report, detailed information for government worldwide expenditures in 2014 are presented.
임종빈(Im Jongbin) 한국항공우주연구원 2011 항공우주산업기술동향 Vol.9 No.2
향후 10년(2010~2019)간 발사될 위성 수는 이전 기간보다 59% 증가한 1,229개로 예측되고 있으며 발사 위성 수의 증가로 2010년부터 2019년까지의 위성 시장 규모는 1,445억 달러, 발사체 시장 규모는 510억 달러로 성장할 것으로 예측되고 있다. 이에 우주발사체 자력개발 능력을 가진 나라는 발사능력 향상을 위해 후속발사체 개발을 진행 중에 있으며, 그 외 국가들은 자주적 우주접근 능력 확보를 위해 우주발사체 개발에 노력하고 있다. 본 논문에서는 세계 각국의 발사체 발사 현황을 분석하였고 각 발사체의 발사 성공률을 확인하였다. 발사체 발사는 1957년 이후 현재까지 약 5,182번 수행되었다. 발사체 발사 실패 원인 분석 결과 50% 정도가 추진 관련 문제이었으며 1980년~2007년 기간 동안에는 항법유도 관련 문제는 줄어든 반면 소프트웨어 및 컴퓨터 시스템 관련 문제가 증가한 것을 알 수 있다. 소프트웨어 및 컴퓨터 시스템 관련 문제는 1990년~1999년 사이에는 8%이었지만 1999년~2007년 사이에는 21%를 기록하였다. 본 논문에서 조사된 내용은 새로운 발사체 개발 시 발사체의 신뢰도 향상을 위한 고려 대상 선정에 활용 될 수 있을 것이다. It is estimated that 1,229 satellites will be launched in 2010–2019, a 59% increase over the 772 units launched in 2000–2019. The manufacturing and launch of 1,229 satellites should generate revenues of $195 billion to the world space industry, a significant growth of 50% relatively to the past ten years (2000–2009). The countries, have their own space launch vehicles, are trying to improve space launch capability and to develop reusable launch vehicles. Other countries are developing space launch vehicles in order to ensure their independent space capabilities. In this paper, the current state of worldwide space launches was analyzed and the success rate of launch vehicles was confirmed. 39% of failures occur during operation of final stage. Propulsion anomalies have been and continue to cause most known failures in vehicle launches. Software and computing systems are a growing concern. It is 8% of failures in 1990-1999 and 21% of failures in 1999-2007.