• 정보학연구
• /
• 제12권3호
• /
• pp.19-24
• /
• 2009

Today, we are increasing to the interest for the green energy using power of nature. in this paper, we are proposed to the double tide embankment tidal power plant. The proposed method improve to the two times in the efficiency and cost. also, the proposed methode expect to perform a role in the product green energy, in the case of installation the very difference between the rise and fall of the tide, in this paper.

• 기술혁신연구
• /
• 제18권1호
• /
• pp.199-218
• /
• 2010

정부는 지난 2008년 8월 새로운 국가 발전 패러다임으로 ‘저탄소 녹색성장’을 제안한 바 있다. 이 전략의 골자는 저탄소 사회의 구현과 새로운 성장동력을 동시에 확보한다는 것이다. 하지만 전통적으로 많은 학자들은 두 목적이 서로 상충되는 것으로 인식해 왔다. 다시 말해 녹색전략은 환경규제를 강화하게 되고 이것은 기업의 생산비용을 증대시키게 된다는 것이다. 그러나 포터를 비롯한 일단의 학자들은 이것을 근거가 부족하거나 지나치게 정태적인 분석의 결과로 보았다. 또 이들은 적절한 형태의 환경규제는 기술혁신을 유도함으로써 단기적 비용을 상쇄하는 효과를 나타낼 수 있다고 주장하였다. 이들 논쟁에 관해 많은 선행연구가 있지만 실증연구는 대단히 부족한 것이 사실이다. 본 논문은 환경관리를 위한 정부 정책과 기업의 혁신 활동이 어떤 여건에서 기업의 기술혁신을 유도할 수 있는지를 탐색하고자 하였다. 분석 결과, 기업의 녹색경영전략에 따라 경영성과에 차이가 있는 것으로 나타났다. 특히 외부 규제에 대한 대응정도나 내부 녹색경영 의지가 높을수록 기술성, 수익성, 성장성 등이 커지는 경향을 확인할 수 있었다. 그리고 국제 환경규제나 기후변화협약에 대해 기업이 처한 여건 역시 기술과 경영 두 측면에서 경영성과에 영향을 미치는 것으로 나타남으로써 기술혁신활동과 환경규제 그리고 경영성과 간의 상관성을 확인할 수 있었다.

• International journal of advanced smart convergence
• /
• 제11권2호
• /
• pp.64-70
• /
• 2022

In recent years, with the continuous innovation and upgrading of engine software, the real-time rendering technology in film and television has been continuously improved, and the virtual production technology has also developed rapidly. This paper introduces the green screen often used in traditional film production and a virtual production technology based on light-emitting-diode background wall that was proposed and implemented last year. We analyzed the two production methods of virtual production and compared their characteristics. Based on these results, we can better understand the differences and respective advantages of the two production methods. And we also can according to the production budget, production cycle and the creative and technical capabilities of the team make better choices during the production process. We believe virtual production technology will be production in the future to provide a more solid technical guarantee for the development of the film industry, and this work will pave the way for further research on virtual production technology.

• Journal of Positioning, Navigation, and Timing
• /
• 제3권3호
• /
• pp.107-116
• /
• 2014

When an incoming Global Positioning System (GPS) signal is acquired, pull-in search performs a finer search of the Doppler frequency of the incoming signal so that phase lock loop can be quickly stabilized and the receiver can produce an accurate pseudo-range measurement. However, increasing the accuracy of the Doppler frequency estimation often involves a higher computational cost for weaker GPS signals, which delays the position fix. In this paper, we show that the Doppler frequency detectable by a long coherent auto-correlation can be accurately estimated using a complex-weighted sum of consecutive short coherent auto-correlation outputs with a different Doppler frequency hypothesis, and by exploiting this we propose a noise resistant, low-cost and highly accurate Doppler frequency and phase estimation technique based on a reverse directional application of the finite rate of innovation (FRI) technique. We provide a performance and computational complexity analysis to show the feasibility of the proposed technique and compare the performance to conventional techniques using numerous Monte Carlo simulations.

• Corrosion Science and Technology
• /
• 제21권6호
• /
• pp.423-433
• /
• 2022

The objective of this study was to determine whether Cymbopogon citratus extract as a corrosion inhibitor from natural tropical resources could prevent corrosion of carbon steel in sulfuric acid solution. Inhibitory action of this extract was investigated using electrochemical methods such as potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Those methods revealed corrosion rate, efficiency of inhibition, and adsorptions isotherm values when the extract was added to the sulfuric acid solution at concentration up to 500 ppm with various immersion time at ambient temperature. Results revealed that higher concentration of the extract and longer immersion time decreased the corrosion rate of carbon steel whereas the inhibition efficiency of the extract was increased up to 97.25%. The value of charge transfer resistance was increased significantly by adding the extract at concentration up to 500 ppm with an immersion time of 60 minutes. The type of the extract was a mixed inhibitor. It could inhibit the corrosion process in both anodic and cathodic sides electrochemically. Results of this study suggest that the mechanism of adsorption on the surface of carbon steel is related to Langmuir adsorption isotherm.

• 융합정보논문지
• /
• 제10권8호
• /
• pp.120-126
• /
• 2020

디지털 트랜스포메이션 시대가 시작됨에 따라 기업의 환경도 많은 변화가 일어나고 있다. 기업들은 이제는 과거와는 다른 경쟁 환경하에 놓이게 되었다. 디지털 트랜스포메이션의 관련 기술들을 중심으로 상상할 수 없을 정도의 많은 기술적인 혁신들이 일어나고 있다. 기술혁신에 대한 연구도 과거와는 다르게 많이 진행이 되고 있다. 이에 본 연구에서는 SCOPUS 데이터베이스를 중심으로 2015년부터 2019년까지 기술혁신이라는 주제로 한 논문을 검색하였다. 논문중에서 초록을 제공하고 있는 논문 1,043편을 수집하고, 이를 텍스트 마이닝 기법과 LDA 기법을 활용하여 분석을 수행하였다. 분석결과, 기술혁신에 대한 연구가 지속적으로 증가를 하고 있는 것으로 나타났으며, 다양한 분야에서 기술혁신에 대한 연구가 이루어지고 있는 것으로 나타났다. 또한 기술혁신의 주제 외에도 기술혁신과 관련된 다양한 키워드들도 도출이 되었다.

• Asian Journal of Innovation and Policy
• /
• 제12권2호
• /
• pp.177-199
• /
• 2023

In traditional studies on North Korea, conservative media in South Korea generally report and have an attitude toward anti-North Korea. It is a similar context as South Korea's conservatives view the U.S. and Japan more closely and positively than North Korea. This study is about how the reporting frames and information sources on North Korean science and technology in South Korea's conservative and progressive media differ and show trends. As a result of analyzing the reporting frame on North Korean science and technology by conservative and progressive media, progressive media showed similar trends or slightly positive responses to North Korean science and technology. But the reanalyzed result after dividing it into conservative and progressive governments, the opposite result came out. In the conservative government, the progressive media dealt with very positive aspects of North Korea's science and technology, and in the progressive government, there was a clear tendency to report negative rather than positive. What can be inferred from this is that the progressive media of South Korea had at least quite different directions of the progressive government in dealing with North Korean science and technology, but rather close to anti-North Korea. It is difficult to reach a hasty conclusion because this study has not dealt with all the press and only 10 years after the Kim Jong-Un regime. Nevertheless, this study may provide implications in that it is the first study to analyze how South Korean conservative and progressive media frame North Korean science and technology.

• Asian Journal of Innovation and Policy
• /
• 제9권1호
• /
• pp.1-11
• /
• 2020

In 2015, the State Council of South Korea finalized its goal to reduce greenhouse gas emissions by "37% from the business-as-usual (BAU) level" by 2030 across all the economic sectors. Of that reduction, 4.5% will be achieved overseas by leveraging Emission Trading Systems (ETS) aided by international cooperation. In line with this, considering both the demand for and supply of the carbon market increased after the Paris agreement, the importance of public diplomacy in negotiating climate change actions also rose. This study aimed to analyze the impact of international discussions such as the United Nations Framework Convention on Climate Change (UNFCCC) on domestic policies and the types of public diplomatic climate change policies pursued by different government agencies, and draw implications from them. This study attempted to find implications from the Korean government's public diplomacy on climate change for developing countries. Lessons learned regarding Korea's public diplomacy would provide a practical guidance to the Asian developing countries, which are suffering from environmental crisis at a phase of rapid economic growth.

• 정보학연구
• /
• 제8권3호
• /
• pp.51-56
• /
• 2005

In this paper, we describe a study on the relationship between spectral sensitization and photographic characteristics of color paper. The photographic emulsion used in this study is a green-sensitizing emulsion. U.V maximum absorption peak value of 9-phenyl-5,5'-diphenyl-3,3'-bis(3-sulfopropyl)benzoxazolo carbocyanine triethyl ammonium salt was observed 507nm, and wedge spectrograms maximum peak value of color paper added dye to photographic emulsion was shown 553nm. As compared with the absorption peak of the dye in methanol solution, the sensitizing peaks of 9-phenyl-5,5'-diphenyl-3,3'-bis(3-sulfopropyl)benzoxazolo carbocyanine triethyl ammonium salt have red shifts of 46nm. The photographic characteristics of green-sensitizing emulsion were obtained contrast(2.6), speed(48-57), fog(0.08). Therefore, benzoxazolo carbocyanine dye is of industrial importance as green-sensitizing dye in the spectral sensitization of photographic emulsion.

• 한국환경복원기술학회지
• /
• 제19권5호
• /
• pp.11-17
• /
• 2016

The purposes of this research are to estimate area of greenable roof and to monitor maintaining of green roofs using World-View 2 images. The contents of this research are development of World-View 2 application technologies for estimation of green roof area and development of monitoring and maintaining of green roofs using World-View 2 images. The available green roof areas in Gwangjin-gu Seoul, a case for this study, were estimated using digital maps and World-View 2 images. The available green roof area is approximately 12.17% ($2,153,700m^2$) of the total area, and the roof vegetation accounts for 0.46% ($80,660m^2$) of the total area. For verification of the extracted roof vegetation, Vworld 3D Desktop map service was applied. The study results may be used as a decision-making tool by the government and local governments in determining the feasibility of green roof projects. In addition, the project implementer may periodically monitor to see whether roof greening has maintained for efficient management of projects, and a vast amount of World-View 2 images may be regularly used before and after the projects to contribute to sharing of satellite images information.