국가 친환경 에너지전환 추진을 위한 총괄연구

이상엽 ( Sangyup Lee ),이창훈,정예민 ( Yeimin Chung ),이유진 ( Yujin Lee ) 한국환경정책평가연구원 2018 사업보고서 Vol.2018 No.-

한국환경정책·평가연구원(KEI)은 환경 관련 전문가를 중심으로 지난 수 년간 기후변화정책포럼 등 사회적 의견을 수렴할 수 있는 논의의 장을 운영해왔다. 보다 효과적 정책 개발을 위한 노력의 일환으로 2018년에는 기존보다 논의 수준 심화 및 범위를 확대를 시도하였다. 본 연구에서는 친환경, 지속가능 개발을 위한 기반을 마련한다는 차원에서 새로운 에너지 체계를 갖추기 위해 우리 사회에 요구되는 사회, 경제, 환경 등 다양한 부문의 다양한 사안을 다루었다. 국가적 차원에서 친환경에너지로의 전환을 시도하고 있으나 아직 미흡한 상황이며, 이를 극복하기 위해서는 구체적 이행계획 수립과 폭넓은 사전 검토가 필요하다. 특히, 에너지 정책과 기후, 대기 정책 등과의 긴밀한 연계성을 확보하는 것은 필수적이다. 이와 관점에서 본 연구에서는 친환경 에너지전환 과정에서 우리 사회가 현재 수행하는 노력과 정책 성과 제고를 위한 큰 틀의 논의를 수행하기 위해 ‘친환경에너지기후 포럼’을 운영하였다. 포럼에서는 전력시장, 에너지세재 개편, 지역에너지 기반 에너지 전환 등 친환경 에너지전환 관련 연구를 기반한 심도있는 논의를 진행하였다. 또한, 우리 사회의 쟁점을 면밀하고 폭넓게 다루기 위해 일반시민까지 포함한 실질적 논의의 장으로서 토론회(‘친환경 에너지전환 토론회 시리즈’)를 수행하였다. 토론회에서는 사회적 문제에 대한 이해도를 높이고 정책 수용성을 높이기 위해 정부, 학계, 연구계, 산업계는 물론 일반시민까지 다양한 이해관계자가 참여하였다. 또한, 시민사회와 사회적 문제에 대한 의식 공유 및 해결방안 모색을 위한 협동연구를 시도하였다. 본 연구는 통해 정부, 산업계, 학계 및 시민단체를 중심으로 국내외 친환경에너지 및 기후 부문의 주요 이슈에 대해 심도 있는 논의를 수행했으며 우리 사회가 당면한 문제에 정부, 학계, 산업계의 역할을 살펴볼 수 있는 기회를 제공한 것으로 평가할 수 있다. The KEI has operated a forum for discussions on collecting social opinions, including the Climate Change Policy Forum, for the past few years, with environment-related experts at the center. In an effort to develop a more effective policy, this study attempted to deepen and broaden the level of discussion than before. In this study, we dealt with various issues such as society, economy, and environment, which are required for our society to establish a new energy system for eco-friendly, sustainable development. Although it is trying to convert eco-friendly energy, however it is still insufficient, so that detailed implementation plans and extensive review are needed. In particular, it is essential to ensure close links between energy policy and climate, atmospheric policy, and so on. In this regard, this research operated the 'Green Energy Climate Forum' to discuss widely what our society is required and how to achieve its goals in the process of eco-friendly energy conversion. The forum held in-depth discussions based on research on eco-friendly energy conversion, such as the power market, energy tax reform, and regional energy-based energy conversion. In addition, the 'Green Energy Conversion Discussion Series' was carried out as a venue for practical discussions, including even ordinary citizens, in order to deal with the issues of our society in detail and in broad scope. In the discussion session, various stakeholders participated, ranging from the government, academia, research circles, industry and ordinary citizens, in order to enhance understanding of social issues and increase policy acceptability. In this study, cooperative research was attempted with the aim of sharing awareness and finding solutions to civil society and social problems. Through this study, the government, industry, academia and civic groups conducted in-depth discussions on major issues in the eco-friendly energy and climate sector. On the problems facing our society at the moment, it can be assessed as providing an opportunity to think about what the roles of the government, academia and industry are.

Effect of alkali metal ion in the electrolyte on electrochemical properties of aluminum-air batteries

Yeon-Woo Chung,Sangyup Lee,Weon-Kyung Choi,Changhyun Baeg,Soon-Ki Jeong 한국표면공학회 2023 한국표면공학회 학술발표회 초록집 Vol.2023 No.11-1

Factors affecting maxillary sinus pneumatization following posterior maxillary tooth extraction

Lim, Hyun-Chang,Kim, Sangyup,Kim, Do-Hyup,Herr, Yeek,Chung, Jong-Hyuk,Shin, Seung-Il Korean Academy of Periodontology 2021 Journal of Periodontal & Implant Science Vol.51 No.4

Purpose: The aims of the present study were 1) to quantitatively evaluate the extent of sinus pneumatization and 2) to determine the factors affecting sinus pneumatization. Methods: Based on implant treatment records, a list of patients who underwent implant placement on the posterior maxilla was obtained. Among them, patients with pre-extraction and post-extraction (before implant placement) panoramic radiographs were selected. After excluding radiographs with low resolution and image distortion, the radiographs before and after extraction were superimposed using computer software. Subsequently, the extent of sinus pneumatization (the vertical change of the sinus floor) was measured. Simple and multiple mixed models were used to determine the factors affecting sinus pneumatization. Results: A total of 145 patients were eligible for the present investigation. The average extent of sinus pneumatization was 1.56±3.93 mm at 176 tooth sites. Male sex, single tooth extraction, extraction of an endodontically compromised tooth, a class I root-sinus relationship, and sinus membrane thickening >10 mm favored pneumatization, but without statistical significance. The maxillary second molar presented the greatest pneumatization (2.25±4.39 mm) compared with other tooth types. This finding was confirmed in the multiple mixed model, which demonstrated a statistically significant impact of the extraction of a second molar compared with the extraction of a first premolar. Conclusions: Maxillary sinus pneumatization was 1.56±3.93 mm on average. The extraction of a second molar led to the greatest extent of pneumatization, which should be considered in the treatment plan for this tooth site.

Do Death Certificate Errors Decrease as Clinical Experience in an Emergency Department Increases?

Kim Jung Jun,Kim Sun Hyu,Chung Sangyup,Park Byeong Ju,Park Soobeom,Park Song Yi 대한의학회 2024 Journal of Korean medical science Vol.39 No.7

Background: This study aimed to evaluate the relationship between clinical experience and death certificate (DC) errors by analyzing DCs written by experienced emergency physicians (EPs). Methods: DCs issued by four experienced EPs over a 10-year period were retrospectively reviewed. DC errors were divided into major and minor errors based on whether they affected the cause of death (COD) determination. The errors were judged through first and second evaluations. Basic information regarding DCs and 10-year changes in DC errors were analyzed. Results: A total of 505 DCs were analyzed, with an average of 34 to 70 for each study year. The number of CODs written in the DCs tended to decrease over time. The presentation of major DC errors did not show a tendency to change over time. However, the sum of the major and minor errors tended to increase over time. Secondary conditions as the underlying COD tended to increase, and the incompatible causal relationships between CODs tended to decrease over time in the detailed analysis of major errors. The increasing tendency for incorrect other significant conditions, incorrect type of accident, incorrect intention of the external cause, no record of the trauma mechanism, and record of the trauma mechanism without another COD were found in the detailed analysis of minor errors. Conclusion: DC errors did not decrease as clinical experience increased. Education to reduce DC errors and a feedback process for written DCs are necessary, regardless of clinical experience.

원격조종을 위해 불확실한 시간 지연 측정값을 고려한 모션 추정 방법

최민용(Minyong Choi),정완균(Wan Kyun Chung),최원섭(Wonsub Choi),이상엽(Sangyup Yi),박종훈(Jonghoon Park) 제어로봇시스템학회 2008 제어·로봇·시스템학회 논문지 Vol.14 No.8

Motion estimation is crucial in a remote control for its convenience or accuracy. Time delays, however, can occur in the problem because data communication is required through a network. In this paper, state estimation problem with uncertain time delayed measurements is addressed. In dynamic system with noise, after taking measurements, it often requires some time until that is available in the filter algorithm. Standard filters not considering this time delays cannot be used since the current measurement is related with a past state. These delayed measurements are solved with augmented extended Kalman filter, and the uncertainty of delayed time is also resolved based on an explicit formulation. The proposed method is analyzed and verified by simulations.