• 한국신재생에너지학회:학술대회논문집
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• 2010.11a
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• pp.139.1-139.1
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• 2010

제 3차 국가에너지기본계획이 시행됨에 따라 전체 에너지 공급량 중 신재생에너지가 차지하는 비율은 점차 늘어날 전망이다. 이와 관련하여 2012년부터 RPS 시행이 확정되었다. RPS(신재생에너지 의무비율할당제)는 신재생에너지에 의한 발전 비율을 설정함으로써 공급을 늘리는 긍정적인 측면이 있으나 이와 동시에 전기요금 인상을 수반한다. 요금 인상으로 인하여 발생할 수 있는 소비자의 반감을 완화시키고 전기요금에 대한 현실적인 합의점을 찾으려면 소비자가 재생에너지 전력에 대하여 어느 정도의 지불의사를 가지고 있는지에 대한 연구가 선행적으로 진행되어야 한다. 한편 RPS의 도입은 신재생에너지 원간 가격경쟁을 촉진시키게 된다. 이 과정에서 성장잠재력이 높은 에너지원이라 하더라도 현재의 발전단가가 높다면 잠재력을 발휘하기 전에 도태될 가능성이 있다. 이러한 RPS 도입의 영향에 대처할 수 있는 정책수립의 기초자료를 마련하기 위해, 재생에너지 전력에 대한 소비자 측면의 효용이 원별로 분석될 필요가 있다. 본 연구에서는 조건부 가치평가법(Contingent Valuation)을 적용하여 수력, 풍력, 태양광으로 발전된 재생에너지 전력에 대한 지불의사액(Willingness to Pay)을 추정하였다. 단일 설문지 내에서 여러 에너지원에 대한 지불의사액을 순차적으로 물어보게 될 경우, 질문순서가 지불의사액 추정에 편의를 가져오는 순서효과(Sequence Effect)가 발생할 수 있다(Boyle et al.,1993). 이러한 순서효과를 제거하기 위해서 유형에 따라 질문순서를 다르게 하여 각 에너지원에 대한 지불의사액을 묻는 방향으로 설문을 설계하였다. 분석결과 수력, 풍력, 태양광으로 발전한 전력에 대한 지불의사액 간에는 유의한 차이 가 나타나지 않았으며, 순서효과로 인한 편의 또한 지불의사액에 유의한 영향을 미치지 않는 것으로 관측되었다.

• Journal of the Korean Data and Information Science Society
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• v.27 no.2
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• pp.477-486
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• 2016

This study was to evaluate of the reliability and validity of the Risk Perception Survey - Diabetes Mellitus (RPS-DM) with Korean diabetes patients. A total of 183 patients participated in this study from December 4, 2014 to January 1, 2015 with self-reported questionnaires. The data was analyzed using exploratory factor analysis, cronbach's alpha, and item to total correlation. The factor structure of the instrument showed the cumulative variance of 45.1% in the factor analysis and a four-factor structure was found to be appropriate. The comparative site risk score matched with the RPS-DM in English except item 7, 8, and 12. The RPS-DM in Korean version has been found to be reliable and valid.

• 한국신재생에너지학회:학술대회논문집
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• 2011.05a
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• pp.133.1-133.1
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• 2011

우리나라는 2012년부터 신재생에너지 공급의무화제도(Renewable Portfolio Standards, RPS)의 도입을 확정하였다(지식경제부 고시 제2010-244호). RPS 제도는 기존의 발전사업자에게 총 발전량 중 일정량 이상을 신재생에너지 전력으로 공급토록 의무화하는 제도이다. RPS의 도입을 통해 일차적으로 신재생에너지의 보급 확대를 도모할 수 있으며, 부차적으로 신재생에너지 공급확대의 비용의 소비자 귀착을 기대할 수 있다. 본 연구는 RPS 제도로 인한 신재생에너지 보급확대의 비용이 소비자에게 전가된다는 가정 하에, 조건부가치평가법(Contingent valuation)을 적용하여 신재생에너지 전력에 대한 지불의사액(Willingness to pay)을 분석하였다. 본 연구의 주된 목적은 신재생에너지 전력에 대한 지불의사액을 분석하는 데 있어 지역별로 어떠한 차이가 나타나는지 알아보는 데 있다. 이에, 서울, 울산, 강원도, 전라남도의 4개 지역을 설문대상 지역으로 선정하였다. 서울은 신재생에너지를 포함한 에너지 관련 시설에 대한 경험이 거의 없는 비교군에 해당하며, 강원도와 전라남도는 신재생에너지의 이용이 활발한 지역을 대표하는 대조군에 해당된다. 울산은 신재생에너지 이용이 활발하지는 않으나 굴지의 산업단지가 입지한 지역으로, 대형 에너지 관련 시설에 대해 특수한 선호를 보일 것이라 추측되어 대조군으로 선정하였다. 본 연구에서는 이 4개 지역의 주민들을 대상으로 조건부가치평가법을 적용한 설문조사를 시행하여 신재생에너지 전력에 대한 지불의사액을 도출한 후, 이를 비교 분석하였다. 본 연구결과를 통해 신재생에너지에 관련된 경험이 선호에 어떠한 영향을 미치는지 파악할 수 있으며, 도출된 신재생에너지 전력에 대한 지불의사액은 향후 RPS 정책 도입시 전기요금 산정 관련 논의의 참고자료로 활용될 수 있을 것으로 기대된다.

• Journal of the Korean Applied Science and Technology
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• v.32 no.3
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• pp.588-598
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• 2015

Recently, the government is actively promoting the RFS(Renewable Fuel Standards) and RPS(Renewable Portfolio Standards). Therefore, the importance of renewable energy fuel is being highlighted more than ever. Now is the time required active research in Korea. Since power bio-fuel oil demonstration project is underway dissemination to meet RPS quota. In this study, we investigated emission performance to make the performance standard draft of bio-fuel oil. In addition, the quality properties of the fuel oil and bio-oil, and after combustion in industrial boilers and compared the amount of exhaust gas. It was reduced emissions of bio-oil in industrial boilers due to bio-fuel properties as compare with fuel oil.

• The Journal of the Acoustical Society of Korea
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• v.11 no.2
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• pp.73-84
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• 1992

This paper studies noise subtraction methods and distance measures for speech recognition in a noisy environment, and investigates noise robustness of the distance measures applied to the problem of isolated word recognition in white Gaussian and colored noise (vehicle noise) environments. Noise subtraction methods which can be used as a pre-processor for the speech recognition system, such as the spectral subtraction method, autocorrelation subtraction method, adaptive noise cancellation and acoustic beamforming are studied, and distance measures such and Log Likelihood Ratio ($d_{LLR}$), cepstral distance measure ($d_{CEP}$), weighted cepstral distance measure ($d_{WCEP}$), spectral slope distance measure ($d_{RPS}$) and cepstral projection distance measure ($d_{CP},\;d_{BCP},\;d_{WCP},\;d_{BWCP}$) are also investigated. Testing of the distance measures for speaker-dependent isolated word recognition in a noisy environment indicate that $d_{RPS}\;and\;d_{WCEP}$ which weigh higher order cepstral coefficients more heavily give considerable performance improvement over $d_{CEP}and\;d_{LLR}$. In addition, when no pre-emphasis is performed, the recognizer can maintain higher performance under high noise conditions.

• KIEAE Journal
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• v.17 no.1
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• pp.77-82
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• 2017

In power supply systems for urban areas, issues such as a progressive tax have escalated recently. In this regard, photovoltaic power generation, which is appraised as an alternative power generation system, is drawing attention increasingly for its high stability and applicability to existing infrastructure. This study assessed the realistic feasibility of photovoltaic power generation and also analyzed the economic benefits expected when it is linked with green roof, which is likely to promote ecological functions in urban areas, based on the Seoul solar map, RPS, and actual monitoring data. The economics analysis of 30kW photovoltaic power generation applied with the monthly average horizontal solar radiation of six grades in the Seoul solar map showed that positive NPV was up to grade 4, while grade 5 or poorer showed negative NPV and indicated that it is difficult to assure appropriate feasibility. Compared with non-afforestation, when green roof was applied, monthly average power improvement efficiency was 7.2% at highest and 3.7% at lowest based on yearly actual monitoring data. The annual average was 5.3%, and the efficiency was high relatively in summer, including September and November. As for the economic benefits expected when 30kw photovoltaic power generation is combined with green roof based on the average horizontal solar radiation of grade 1 in the Seoul solar map, SP has improved 0.2 years to 7.4 years, and EP has improved 0.5 years to 8.3 years.

• Environmental and Resource Economics Review
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• v.20 no.1
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• pp.61-98
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• 2011

This study conducts economic evaluation of alternatives for $CO_2$ reduction of thermal power plants. Two alternatives in reducing $CO_2$ emission are considered for the evaluation under the RPS(Renewable Portfolio Standard) system; one is to perform renewable energy quotas and another is to construct green thermal power plants using CCS(Carbon Capture and Sequestration). As evaluation methods, DCF(Discount Cash Flow) and ROPM(Real Options Pricing Method) are employed. At a discount rate of 7.5% applied to the Electricity Supply and Demand Plan, it is shown that green thermal power generation has economic dominance under both evaluation methods.

• Animal cells and systems
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• v.7 no.2
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• pp.139-144
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• 2003

We analyzed seven Y chromosome binary markers (YAP, RPS4Y_711,\;M9,\;M175,\;LINE1,\;SRY_+465$ and 47z) in samples from a total of 254 males from Koreans and tow Mongolian ethnic groups (Buryat and Khalkh) to study the genetic relationship among these populations. We found eight distinct Y haplogroups constructed from the seven binary markers. Haplogroup DE-YAP was present at extremely low frequencies (∼2%) in the Korean and Mongolian populations. This result is consistent with earlier reports that showed the YAP+ chromosomes to be highly polymorphic only in populations from Japan and Tibet in east Asia. The observed high frequency of haplogroup $C-RPS4Y_711$ in the Mongolian populations (∼40%) is concordant with recent findings, showing that the $RPS4Y_711$-T chromosomes were distributed at high frequencies in Siberian and Mongolian populations compared with most other populations from east Asia. Thus, the relatively moderate frequency of haplogroup $C-RPS4Y_711$ in Korean (∼15%) can be seen as genetic evidence for probable interaction with Mongolian and/or Siberian populations. In contrast, the majority (∼75%) of modern Koreans studied here had high frequencies of Y chromosome lineages of haplogroup O-M175 and additional haplogroupts that define sublineage of O-M175, which are most likely related with modern populations in China. In conclusion, our data on the Y chromosome haplogroup distribution may provide evidence for interaction between Korean and Mongolian populations, but Korean tend to be much more related with those from southern-to-northern populations of China than to Mongolians in east Asia.

• Korean Journal of Food Science and Technology
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• v.31 no.6
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• pp.1679-1682
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• 1999

This study was carried out to investigate the effect of hot taste of red pepper seed (RPS) extracts in terms of mixing ratio with red pepper powder (RPP) extracts. As the mixing ratio of RPP extracts to RPS extracts increased, the solid yield, viscosity, turbidity and Hunter a and b values were increased but the L values was decreased. The time-intensity curve from sensory evaluation showed that the hot taste of RPP extracts reached maximum point in short time and decreased fastly while that of RPS slowly developed and maintained the intensity with a little decrease in the tested time. The mixing ratio of RPP and RPS responded the properties of their individual hot taste.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.46 no.9
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• pp.752-759
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• 2018

This paper presents methods and results of nonlinear simulations for a guided munition for verifying stability at slow spin. The munition is launched by an artillery and it deploys the rear fins to reduce its spin. While the spin speed command is set to 1 rps and 3 rps, wind gusts of 3m/s, 7m/s, 10m/s, and 15m/s in amplitude, and 26 different directions were generated as disturbance for each simulation run. Whereas the munition with the spin speed of 3 rps didn't flip, that with 1-rps spin flipped under some gusts. However, the gusts which increase airspeed in the flight direction didn't introduce harmful effect. Most importantly, all the flips of the munition was observed near the end of the simulation where the munition is going down. No problem was observed near the summit of trajectory.