• The Magazine for Energy Service Companies
• /
• s.20
• /
• pp.26-29
• /
• 2003

중소기업진흥공단 펌프에너지기술실은 민간업체에 제도적, 기술적 지원을 통해 고효율 펌프시장의 활성화와 국내 펌프산업의 경쟁력 강화를 위한 기반을 마련하는 역할을 하고 있다. 고효율 펌프로 인한 에너지 절감량은 연간 230억kWh에 달하는 것으로 추산되며, 펌프에너지에 대한 소비자 인식전환을 위해 ESCO사업을 적극 활용하고 있다.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
• /
• 1993.05a
• /
• pp.42-46
• /
• 1993

1970년대의 오일쇼크이후 대체에너지개발의 중요성에 대한 인식이 점차 확산되어 가는 추세에 있다. 대체에너지가운데 특히 태양광발전은 연료가 필요 없는 무공해 Clean 에너지원으로서 미래 전원공급원의 한 부분으로 그 역할이 주목되고 있다. 더욱이 자원이 빈약한 국내실정 하에서 태양광발전의 기술개발은 필연적이므로 향후 보급촉진을 위한 실용화방안을 제시하고자 한다.

• The Journal of the Acoustical Society of Korea
• /
• v.23 no.3
• /
• pp.235-241
• /
• 2004

This paper studied the pattern recognition algorithm and feature parameters for speaker and context independent emotion recognition. In this paper, KNN algorithm was used as the pattern matching technique for comparison, and also VQ and GMM were used for speaker and context independent recognition. The speech parameters used as the feature are pitch. energy, MFCC and their first and second derivatives. Experimental results showed that emotion recognizer using MFCC and its derivatives showed better performance than that using the pitch and energy parameters. For pattern recognition algorithm. GMM-based emotion recognizer was superior to KNN and VQ-based recognizer.

• JOURNAL OF ELECTRICAL WORLD
• /
• s.348
• /
• pp.48-54
• /
• 2005

고효율화로 에너지 자급도 높여야 단기 대책엔 한계 기술개발이 첩경 태양광산업 수직계열화 추진 고무적

• 한국신재생에너지학회:학술대회논문집
• /
• 2009.11a
• /
• pp.263-263
• /
• 2009

최근 정부의 녹색성장 정책과 RPS(Renewable Portfolio Standard)도입 계획에 따라 재생가능에너지 개발계획이 쏟아지고 있다. 특히 조력 발전의 경우, 시화, 가로림, 강화, 인천만 등 전 세계 최대 규모 타이틀을 서로 갱신하가며 서해바다를 중심으로 건설 계획이 집중되고 있다. 그러나 조수간만의 차이를 이용해 친환경 에너지원으로 인식되던 조력발전이 그 규모와 방식에 따라 환경파괴적 발전원으로 인식되고 있는 것도 현실이다. 갯벌소멸, 해양생태계 파괴, 해수면 상승 등 생태적 환경문제 야기와 더불어 지역 주민간의 사회환경적 갈등도 초래되고 있다. 본 논문은 국내 조력발전의 개발 계획과 과정을 살펴보고 생태적.사회적 환경영향 피해 점검을 통해, 바람직한 조력발전의 모습을 제시해 본다.

• The Magazine for Energy Service Companies
• /
• s.23
• /
• pp.26-27
• /
• 2003

이라크전쟁에 따른 유가상승은 에너지절약에 대한 인식을 고취시켜 에너지절약 시장을 확대할 수 있는 계기가 될 수 있었음에도 불구하고, 국내기업의 원가상승에 따른 수출감소, 북핵문제 등 잇따른 악재발생으로 경기회복전망이 불투명하여 기업들이 투자계획을 유보하거나 연기하고 있는 상황입니다. 이렇게 침체된 투자분위기를 고조시키기 위해 정부에서는 다각적인 지원책을 마련하여 시행중에 있습니다.

• Journal of The Korean Association For Science Education
• /
• v.32 no.4
• /
• pp.775-788
• /
• 2012

This study was done at a scientific camp sponsored by Nara Women's University Secondary School, Japan. In this school, $10^{th}$ grade students from 4 East Asian countries: Korea, Japan, Taiwan, and Singapore, participated. We made a research on students' perceptions about nuclear energy. Sample populations include 77 students in total, with 12 Korean, 46 Japanese, 9 Taiwanese and 10 Singaporean students. Overall perceptions comparison about nuclear energy shows average values from the order of highest Korea, Taiwan, Singapore, and to lowest, Japan. We implemented a T-test to identify perception differences about nuclear energy, with one group that include 3 countries (Korea, Taiwan and Singapore) and another group that includes all the Japanese students. T-test results of perceptions about nuclear energy shows students from the 3 countries of Korea, Taiwan and Singapore having higher average than Japanese students. (p<.05). Korean average scores regarding overall perceptions about nuclear energy show as the highest in all 4 East Asian countries and also highest in all subcategories. On the contrary in Japan, they have lower and negative perceptions of nuclear energy. In spite of these facts, perceptions of Japanese students about nuclear energy seem lowest and negative mainly because of the recent Fukushima nuclear power plant disaster, caused by the tsunami and its subsequent damages and fears of radiation leaks, etc. This shows that negative information about future disasters and its resulting damages like the Chernobyl nuclear accident could influence more on people's risk perception than general information like nuclear energy-related technologies or the news that the plant is operating normally, etc. Even if the possibility of this kind of accident is very low, just one accident could bring abnormal risks to technology itself. This strong signal makes negative image and strengthens its perceptions to the people. This could bring a stigma about nuclear energy. This study shows that Government's policy about the highest priority for nuclear energy safety is most important. As long as such perception and decision are fixed, we found that it might not be easy to get changed again because they were already fortified and maintained.

• The Journal of the Acoustical Society of Korea
• /
• v.29 no.4
• /
• pp.278-285
• /
• 2010

The difference between training and test environments is one of the major performance degradation factors in noisy speech recognition and many silence feature normalization methods were proposed to solve this inconsistency. Conventional silence feature normalization method represents higher classification performance in higher SNR, but it has a problem of performance degradation in low SNR due to the low accuracy of speech/silence classification. On the other hand, cepstral distance represents well the characteristic distribution of speech/silence (or noise) in low SNR. In this paper, we propose a Cepstral distance and Log-energy based Silence Feature Normalization (CLSFN) method which uses both log-energy and cepstral euclidean distance to classify speech/silence for better performance. Because the proposed method reflects both the merit of log energy being less affected with noise in high SNR and the merit of cepstral distance having high discrimination accuracy for speech/silence classification in low SNR, the classification accuracy will be considered to be improved. The experimental results showed that our proposed CLSFN presented the improved recognition performances comparing with the conventional SFN-I/II and CSFN methods in all kinds of noisy environments.

• Journal of Science Education
• /
• v.43 no.3
• /
• pp.284-299
• /
• 2019

The purpose of this study is to investigate elementary school students' conceptions about the energy represented in the integrated theme 'Energy and life' of the 2015 revised science curriculum. The instruments were developed to grasp students' understanding about 'the concepts of energy,' 'forms of energy,' 'conversion of energy,' and 'energy use of plants and animals.' The surveys were conducted on 92 elementary school students in Seoul. The students' answers were analyzed by descriptive statistics, clouds and semantic network analysis. The results are as follows: 'Electricity' and 'electric energy' were most frequently mentioned as the associated concepts to energy and forms of energy, respectively. Also, the daily use of energy was mixed to the use in science. According to conceptual hierarchy, understanding of energy conversion was dependent on the understanding of energy forms. Although students have basic concepts about the energy use of plants and animals, they had some misconceptions and lack of understanding. The educational implications were discussed to teach 'Energy and Life' as integrated theme in new elementary school curriculum.

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 2002.04a
• /
• pp.189-190
• /
• 2002

최근 지구 온난화가 인식되어지면서 이산화탄소는 지구 온난화 기여도의 55%를 차지하는 주 온실기체로 알려지고 있다. 또한 에너지 수급체계를 고려하였을 경우 최근 수십 년 동안 새로운 에너지원에 대한 연구와 개발이 진행되어 원자력 발전과 같은 대체 에너지가 에너지원의 상당 부분을 기여하고 있으나 이와 같은 노력에도 불구하고 화석에너지는 전체 에너지의 50% 이상을 차지하고 있다(에너지관리 공단, 2001). (중략)