• Environmental and Resource Economics Review
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• v.25 no.1
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• pp.89-112
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• 2016

In this paper, as a determining factor of the Environment Kuznets Curve hypothesis, we analyzed the impact of technological innovation. In this paper, in order to empirically validate the role of technological innovation to an inverted U-shaped Environments Kuznets Curve hypothesis, we utilize the 2SLS considering relationship between R&D and the GDP per capita. Also, using the Panel VAR (Panel Vector Auto Regression) model to analyze with what time lag R&D per capita has impact on the emissions of greenhouse gases per capita. Empirical results show that R&D per capita(proxy of innovation) is a important factor to explain Environmental Kuznets Curve hypothesis, and that the external shock such as R&D per capita reduces greenhouse gas emissions per capita with about 3 time lag.

• Tribology and Lubricants
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• v.35 no.1
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• pp.77-86
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• 2019

The present study focuses on the effect of staggered integration factor (SIF) on Morton effect simulation results. The Morton effect is a synchronous rotordynamic instability problem caused by the temperature differential across the journal in fluid film bearings. Convection and conduction of heat in the thin film displaces the hot spot, which is the hottest circumferential position in the thin film, from -20 to 40 degrees ahead of the high spot, where the minimum film clearance is experienced. The temperature differential across the journal causes a bending moment and the corresponding thermal bow in the rotating frame acts like a distributed synchronous excitation in the fixed frame. This thermal bow may cause increased vibrations and continued growth of the synchronous orbit into a limit cycle. The SIF is developed assuming that the response of the rotor-lubricant-bearing dynamic system is much quicker than that of the bearing-journal thermal system, and it is defined as the ratio between the simulation time of the thermal system and the rotor-spinning period. The use of the SIF is unavoidable for efficient computing. The value of the SIF is chosen empirically by the software users as a value between 100 and 400. However, the effect of the SIF on Morton effect simulation results has not been investigated. This research produces simulation results with different values of SIF.

• Journal of the Korea Convergence Society
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• v.13 no.4
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• pp.373-381
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• 2022

The Fukushima nuclear power plant water spill caused by the Great East Japan Earthquake in March 2011 raised fears about radiation exposure through consumption of radioactively contaminated seafood. The Korean government banned importing agricultural and fishery products from eight prefectures near Fukushima, but the related news were continuously reported partly due to the WTO dispute with Japan, which seems to have aggravated consumers' anxiety about seafood. In this study, data on daily purchases of products for three years (2018-2020) were collected and the effect of Japanese radiation-related news on domestic consumers' purchases of seafood was estimated using a polynomial lag distributed model. As a result of the analysis, it was found that radiation-related news had a statistically significant negative effect on the purchase of seafood on the 5th and 6th days after exposure to consumers through the media. It captures the carryover effect in which consumers' perceptions are reflected in the purchase of seafood after exposure to related news.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.11a
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• pp.1044-1047
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• 2020

멀티비전 사이니지는 한 개의 콘텐츠를 분할하여 여러 디스플레이 기기에서 표출하거나, 동일한 콘텐츠(예; 비디오)를 여러 기기에서 동기를 맞춰 동시에 표출 혹은, 시차별로 표출할 수 있는 사이니지를 말한다. 본 논문에서는 멀티비전의 콘텐츠 분할 표출 및 재생 동기화 달성을 위한 대시보드에서의 레이아웃 구성 및 레이아웃 포맷 설계, 다수의 디스플레이 간의 콘텐츠 동기화 재생을 위한 네트워킹 프로토콜 설계에 대한 연구·개발 방안을 제안한다.

• Journal of Technology Innovation
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• v.26 no.1
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• pp.85-105
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• 2018

This study analyzes the economic impacts of Korean R&D expenditure on the industrial structure by technological levels using 2010~2014 Input-Output table data. The industrial structure is reclassified into 4 manufacturing industries by OECD's Technology Intensity Definition. Then, we analyzes the production-inducing and value added-inducing of those industries. As the results of the analysis, it is found that the production-inducing effect by the R&D expenditure has been higher in the middle-high and middle-low technology manufacturing and that the value added-inducing effect has been higher in the middle-high technology manufacturing. On the other hand, the production and value added-inducing effects has been lower in the high-tech manufacturing which is highest in the R&D expenditure. The above results indicate that industrial structure has not been linked with the quality ladder that expresses the enhancement of tech level through R&D expenditure. Based on these results, the policy recommendation implies that R&D expenditure should be concentrated to improve the production- and value-added effects of the high technology manufacturing in order to advance the industrial structure. However, this study has the limitation that the analyses on the dynamic-inducing effects are not carried out due to the lack of fixed capital formation data.

• The Journal of the Korea Contents Association
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• v.10 no.2
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• pp.138-145
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• 2010

Stereoscopic technology can be regarded as core basis technology which is commonly requested in field of next generation stereoscopic multi media information communication. Realization of stereoscopic image in order to express natural images that are close to reality is a part that human constantly put effort, it first began with visual recognition system, went through stereo picture by using binocular disparity and were conducted as video clip stereoscopic age. Life is changing, a new culture is formed, there were technological development which realized imagination as reality based on expansion of IT industry and core trend, and there is 3D stereoscopic image technology in the center. We will look at technology development tendency and development strategy of 3D stereoscopic image in this essay, and will suggest efficient usage plan of 3D stereoscopic image technology for continuous market expansion.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.01a
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• pp.417-418
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• 2023

'오징어 게임', '기생충', K-POP 등의 K-콘텐츠를 중심으로 한류 문화가 세계적으로 전파되고 있으며 이에 따라 방한을 희망하는 외국인들도 증가하고 있다. 그리고 여행자들의 취향이 세분화되면서 개인 맞춤형 여행을 선호하는 방향으로 트렌드가 변화되고 있다. 그러나 외국인을 대상으로 하는 애플리케이션은 많지 않다. 본 연구는 이러한 문제점을 해소하고자 외국인 관광객을 대상으로 맞춤형 서비스를 제공하는 모바일 애플리케이션인 'DisKO'를 개발하였다. 본 앱에서는 여행 취향에 대한 선호도를 기반으로 카테고리별 맞춤형 관광 정보를 제공한다. 그 외에도 외국인 관광객에게 필수적인 번역, 환율, 시차, 지도 등의 편의 기능을 제공한다. 본 앱을 통해 외국인 관광객들은 맞춤형 정보와 반드시 필요한 편의 서비스를 'DisKO'에서 활용할 수 있다.

• Proceedings of the Korean Vacuum Society Conference
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• 2012.02a
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• pp.593-593
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• 2012

CIGS 박막 태양전지는 일반적으로 soda-lime glass(SLG)를 기판으로 사용하여 SLG/Mo/CIGS/CdS/ZnO/ITO/Grid의 구조로 제작된다. 하지만 SLG를 기판으로 사용할 경우, 유리의 특성상 무게가 무겁고, 유연성이 없기 때문에 건축물 적용에 적합하지 않다. 이러한 문제점을 극복하기 위해 가볍고 유연한 금속 및 폴리이미드 기판을 이용한 CIGS 태양전지가 널리 연구되고 있다. 그러나, 폴리이미드 기판의 경우, 특성이 우수한 CIGS 박막을 얻기 위한 고온 공정을 사용할 수 없기 때문에 이에 대한 고려가 필요하다. 본 논문에서는 CIGS 박막 태양전지 제작을 위한 폴리이미드 기판의 특성과 그 위에 형성한 후면 전극의 특성을 논의하고자 한다. 4종류의 폴리이미드 기판에 대한 열 특성을 시차주사열량계(differential scanning calorimeter)와 열중량분석기(thermogravimetric analysis), 열기계분석기(thermo mechanical anaylsis)를 이용해 분석하였다. 또한 Mo 후면 전극을 DC-sputter를 이용해 형성한 후, XRD와 AFM, 4-point probe를 이용하여 결정성 및 표면 거칠기, 면저항을 분석하였다. 결정성과 거칠기는 SLG에 증착했을 때와 동일한 결과를 보였으며, 면저항은 폴리이미드 필름에 증착 할 경우 더 크게 측정되었다. 본 연구는 중소기업청 산연기술개발사업(SL122689) 및 과학기술연합대학원대학교(UST)의 지원을 받아 수행된 "공동연구 지원사업"의 연구결과입니다.

• Journal of Korea Technology Innovation Society
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• v.19 no.3
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• pp.658-685
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• 2016

In technology economic theory, technology innovation through R&D is regarded as a core element of economic growth. This research analyzes how R&D input factor (R&D as a percentage of GDP, total number of researchers, the proportion of science and engineering degree) affects GDP, economic outcome variable, through mediating variable (S&T papers, patent registration). The most effective variable among R&D activity variables is following order: the number of S&T papers (0.967), the total number of researchers (0.373), the proportion of R&D expenditure (0.191), the number of patent registration (0.049), the proportion of science and engineering degree (0.007). It is that the proportion R&D expenditure and the total number of researchers shows greater indirect impact through S&T papers and patent than the direct impact on GDP. This implies the importance of high-quality human resources training and the necessity of maintaining the scale of R&D fund or the importance on GDP. Moreover, S&T papers turns out to have the greatest effect on GDP and implies new outcome and value by sharing and expanding new knowledge and technology created by R&D

• Journal of Korea Technology Innovation Society
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• v.19 no.4
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• pp.711-735
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• 2016

Drug Development is very important for promoting public health and pharmaceutical industry. There has been many studies on the efficiency of drug development, but there are few studies on the drug development R&D performed by government. Since CCR model assumes unidirectional influence of input and output, it is not appropriate to analyze the efficiency of R&D due to the time-lag and spill-over effect. Also, BBC model which assumes variable returns to scale has difficulty in deriving priorities between decision making units. Recently, Range Adjusted Measure (RAM) model has been suggested in R&D efficiency analysis. RAM model measures the efficincy by eliminating inefficiencies under variable returns to scale assumption, and its strong monotonicity enables to provide clear priorities between decision making units. In this study, we analyzed the efficiency of national R&D programs for drug development using the two-step approach, including RAM model and Tobit regression analysis, and discussed major policy implications.