• 조명전기설비학회논문지
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• 제23권6호
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• pp.89-95
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• 2009

최근에는 파워툴(power tools)과 가전 제풀에 있어서 전자적인 전류(commutation)를 사용하는 새로운 형태의 브러시리스 전동기인 플럭스 스위칭 전동기(Flux switching motor)에 대한 관심이 점차적으로 증가되고 있으며, 특히 팬과 펌프 시장에 있어서는 그린 정책으로 인하여 플럭스 스위칭 전동기에 대한 관심이 급격히 증가되고 있다. 플럭스 스위칭 전동기는 유도전동기에 비해서는 높은 전력 밀도(power density)와 상대적으로 높은 효율, 그리고 브러시리스 DC 전동기에 비해서는 간단한 전동기 구조와 가격 경쟁력이라는 장점을 가지고 있다. 따라서 본 논문에서는 팬 용도로 제작된 12/6 폴을 가지는 플럭스 스위칭 전동기의 드라이브 설계와 동작원리에 대해서 나타내고, 팬 용도로 제작된 프로토타입 플럭스 스위칭 전동기의 타당성을 검증하기 위해서 IMS320F2812 DSP와 일반적인 인버터를 이용한 실험 결과를 제시한다.

• 한국가스학회지
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• 제20권1호
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• pp.23-28
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• 2016

환경 친화적 자동차는 우리나라 정부가 추구하는 저탄소 녹생 성장 전략의 상징이어 왔다. 최근 정책 추세에 맞추어, 새로운 LPG 충전소가 많이 지어지고 있다. 하지만 대규모 가스 저장시설에서의 안전사고는 사회적으로 막대한 인명 피해와 재산 피해를 야기시켜 왔다. 이 논문에서는, LPG 충전소에서 안전사고를 사전에 예방하기 위하여 설치방법에 따라 경제적 분석을 실시하였다. 분석결과, 지하 저장소는 그 유지관리 및 효율적인 토지이용 면에서 긍정적인 것으로 나타났다.

• 토지주택연구
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• 제3권2호
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• pp.111-116
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• 2012

The primary purposes of this study are to identify the characteristics of land development in urban area through GIS and remote sensing techniques and to provide useful implications for urban spatial policy. To perform these tasks, Daegu metropolitan city and its vicinities were selected as a study area, and remote sensing data and attributed data were collected, organized and analyzed. This study focuses on the following three steps. First, it identifies the characteristics of land development in urban areas by utilizing multi-temporal satellite image data (Landsat TM, 1980, 1985, 1990, 1995, 2000 and 2005). Second, it tries to find an answer on a critical question concerning land use conversion, i.e., which land use leads expansion of urban area? Third, it derives implications for urban spatial policies based on these findings. The characteristics of the urban extents tell us that the main land use converted into urban use from non-urban uses is green areas. The public sector, central and local governments, leads the land use conversions of suburban lands as exclusive legal body to issue permission of land use change. Based on these findings, this study concludes that the more systematic and technically advanced management tools should be utilized for more effective spatial management for urban growth.

• Journal of Plant Biotechnology
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• 제45권4호
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• pp.299-305
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• 2018

Although new plant breeding technologies facilitate efficient plant breeding without introducing a transgene, they are creating indistinct boundaries in the regulation of genetically modified organisms (GMOs). The rapid advancement in plant breeding by genome-editing requires the establishment of a new global policy for the new biotechnology, while filling the gap between process-based and product-based GMO in terms of regulations. In this study recent developments in producing major crops using new plant breeding technologies were reviewed, and a regulatory model that takes into account the various methodologies to achieve genetic modifications as well as the resulting types of mutation were proposed. Moreover, the communication process were discussed in order to understand consumers' current situation and problems of new plant breeding technology, establish social acceptance well, and understand consumers' disputes such as GMO crops.

• International Journal of Precision Engineering and Manufacturing-Green Technology
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• 제5권5호
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• pp.623-630
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• 2018

The renewable energy systems have been in the spotlight as an alternative for environmental issues. Therefore, the governmental policies are being implemented to spread of promote power generation system using renewable energy in various countries around the world. In addition, Korea has also developed a policy called the power trading contract which can profit from electricity produced from renewable power generation system through Korea Electric Power Corporation (KEPCO) and Korea Power Exchange (KPX). As a result, the power trading contracts can trade power after self-consuming in-house by using small-scale renewable power system for residential customers as well as electricity retailers. The power trading contracts applicable as a small-scale power system have a 'Net metering (NM)' and a 'Power Purchase Agreement (PPA)', and these two types of power trading contracts trade surplus power, but payment method of each power trading is different. The microgrid proposed in this paper is based on grid connected microgrid using Photovoltaic (PV) system and Energy Storage System (ESS), that supplied power to residential demand, we evaluate the operation cost of microgrid by power demand in each power trading contracts and propose the appropriate power trading contracts according to electricity demand.

• Journal of the Korean Wood Science and Technology
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• 제47권3호
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• pp.277-289
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• 2019

Herein, a case study discussing the effect of carbonaceous aerosol pollution, which is emitted during the charcoal kiln manufacturing processes or carbonization processes, on the atmospheric environment is presented . In South Korea, in situ analysis of different charcoal production plants specialized in the production of charcoal sauna indicate that the emitted organic carbon (OC) and elemental carbon (EC) aerosols are significantly influenced by the nature of the biomass and technological processes, i.e., treatment or emissions abatement systems for the exhaust effluent gases. In detail, total carbon (TC), which is calculated as the sum of OC and EC emission factors, varied widely from a charcoal production site to another ranging from 21.8 to 35.8 gTC/kg-oak, where the mean value for the considered production sites was approximately 28 gTC/kg-oak (N = 7 and sum = 196.4). Results indicate that the emission factors from a modern charcoal production process in South Korea are quantitatively lower in comparison with the traditional kiln. This study aims to propose advanced wood processes for the production of charcoal from the viewpoint of environmental protection policy and green engineering.

• The Journal of Asian Finance, Economics and Business
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• 제8권2호
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• pp.213-221
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• 2021

The study investigates the impact of the environmental protection tax, along with other factors such as attitude, subjective norm, environmental concern, and the availability of substitutes on the use of plastic bags in Vietnam. To achieve this objective, a questionnaire was prepared for data collection. The questionnaire employed a 5-point Likert scale with "completely disagree" at 1 and "completely agree" at 5. A total of 327 questionnaires were returned. However, only 291 valid responders were used in the analysis. The Cronbach's Alpha and the exploratory factor analysis were applied to test the scale reliability and discover the structure of the scales. Afterwards, we conducted the confirmatory factor analysis and the structural equation modeling to analyze collected data. The study shows that attitude is an important factor influencing the plastic bag use of consumers. Other factors that also lead to a decline in plastic bags are subjective norm and environmental concern. Meanwhile, the availability of substitutes does not affect consumers' green behavior. Moreover, the major findings of the research suggest the relationship between the environmental protection tax and the use of plastic bags is not statistically significant. In other words, tax policy may fail to change the habit of using plastic bags in Vietnam.

• The Journal of Asian Finance, Economics and Business
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• 제8권1호
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• pp.531-542
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• 2021

The study aims to investigate differences between men and women in influence of various socio-demographic factors on choice of mode of transport. For this purpose, a binary logit model of choice probabilities is implemented on survey data of a developing country city. Results indicate women's choice of travel mode to be more environment-friendly than that of men. Well-educated, working and middle-aged individuals appear to be the most likely to choosing more-polluting modes of transport for frequent travelling purposes. Individuals in the sample who are the least socioeconomically well off are found the most likely to be promising for the environment. The findings of this study suggest the future transportation policies toward development of existing infrastructure of greener modes of transportation in the city such as, public transportation services and pedestrian lanes, so as to manage the rising issues of degrading environmental quality. The study highlights how the consideration and inclusion of socio-demographic factors is crucial for policy recommendation regarding curtailing the environmental damages contributed by transportation sector. Because mobility crucially affects all other indicators of empowerment, and women are the ones using green modes extensively, the city's transportation system should be so developed which gives their safety and security due importance.

• 전자통신동향분석
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• 제36권1호
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• pp.109-119
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• 2021

The Korean government recently announced a plan of the Carbon Neutral policy in addition to the Green New Deal of the Korean New Deal and the Renewable Energy 3020. The energy sector is entering the era of major transformation involving the expansion of decarbonization, decentralization, and digitalization. DNA-oriented ICT technology will be incorporated into the sector. Further, new energy industries and services are being realized via efficient and smart operation and by appropriately managing the energy-environment changes. Recently, ETRI presented a technology development map for 2035 comprising 12 new concepts in four major fields(personal, social, industrial and public) of national intelligence. This map includes the concept of "Energy Maestro" associated with the field of public intelligence for human sustainability. This paper briefly introduces this concept and ETRI's Energy-R&D status. Based on the domain knowledge and the experience acquired through the R&D, ETRI will lead to a new paradigm with respect to the creation of new energy services and industries via the incorporation of the new ICT technologies including AI and big-data into the energy sector.

• The Journal of Asian Finance, Economics and Business
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• 제9권6호
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• pp.253-265
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• 2022

This paper examines South Korea's past developmental experience and its current strategy and policy initiatives to overcome global and domestic challenges and sustain economic growth in the twenty-first century, the digital and global era, to explain how the country became a high-income economy. The findings of this research highlight the following three factors: First, the most significant factor in rapid industrialization was the adoption of an outward-looking strategy, with the help of a highly skilled workforce and the development of high-tech manufacturing and services sectors, which was supported by the government plans. Second, the high R&D intensity helped South Korea become a global leader in information and communication technologies, which has emerged from a top-down innovation system that promotes close collaboration between government, industry, and the academic community. Third, according to the recently released Global Entrepreneurship Index, South Korea tops the region in entrepreneurship environment. Among the list of criteria, South Korea dominates in the ease of starting a business and enforcing contracts. They all play a significant role in encouraging investment, production, communication, and, eventually, economic growth. Finally, this paper suggests forward-looking developments promoting transformation and diversification into high-tech manufacturing and digital and green technologies.