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스테레오 카메라를 탑재한 UAV를 이용한 3차원 위치결정
박성근,김의명,Park, Sung-Geun,Kim, Eui-Myoung 한국국토정보공사 공간정보연구원 2021 지적과 국토정보 Vol.51 No.2
소규모 지역의 3차원 공간정보를 신속하게 구축하는 분야에 UAV를 이용하는 연구가 활발히 이루어지고 있다. 본 연구에서는 지상기준점을 사용하지 않고 스테레오 카메라를 UAV에 탑재하여 영상을 수집하고 영상 매칭과 번들조정, 그리고 축척계수의 결정을 통해서 3차원 위치를 신속하게 구축하고자 하였다. 실험을 통해서 스테레오 제약조건을 이용하여 번들조정을 수행한 경우 평균제곱근오차는 1.475m로 나타났으며 축척을 고려하여 절대표정을 수행한 경우 0.029m로 나타났다. 이를 통해, 본 연구에서 제안한 스테레오 카메라를 장착한 UAV의 자료처리 방법을 이용할 경우 지상기준점을 사용하지 않고도 높은 정확도의 3차원 공간정보를 구축할 수 있는 것을 알 수 있었다. Researches using UAVs are being actively conducted in the field of quickly constructing 3D spatial information in small areas. In this study, without using ground control points, a stereo camera was mounted on a UAV to collect images and quickly construct three-dimensional positions through image matching, bundle adjustment, and the determination of a scale factor. Through the experiment, when bundle adjustment was performed using stereo constraints, the root mean square error was 1.475m, and when absolute orientation was performed in consideration of a scale, it was found to be 0.029m. Through this, it was found that when using the data processing method of a UAV equipped with a stereo camera proposed in this study, high-accuracy 3D spatial information can be constructed without using ground control points.
박성근(Park Sung Geun) 성신여자대학교 교육문제연구소 2017 교육연구 Vol.68 No.-
본 연구의 목적은 2015 개정 교육과정 『통합 사회』에서 공동체주의 정의론에 관한 학습 내용 요소로서 샌델(M. Sandel)의 미덕(virtue) 정의론이 선정될 수 있는지를 고찰하는 데 있다. 연구의 주된 초점은 『통합 사회』의 성취기준 해설 ‘교수학습 및 유의사항’에 서술되어 있는 “학생들이 공동체주의를 집단주의로 이해하지 않도록 유의하여 지도한다.”는 조건에 맞추어져 있다. 결론적으로, 본 연구는 샌델의 미덕 정의론이 집단주의 논제를 극복하기에 충분한 근거를 가지고 있으며, 2009 개정 교육과정 『윤리와 사상』의 학습 내용 요소였던 왈쩌(M. Walzer)의 복합평등(complex equality) 정의론에 비해, 샌델의 정의론이 『통합 사회』의 공동체주의 정의론 교육으로 보다 적합함을 보이고자 한다. The purpose of this study is to examine whether M. Sandel s theory of justice can be selected as a element of learning of communitarian theory of justice in the integrated social studies of the 2015 revised national curriculum. The main focus of the study is on the condition that students should be careful not to understand communitarianism as collectivism , which is described in the Explanatory Learning and Notes of the Achievement Standards of the Integrated Social studies . In conclusion, this study suggests that M. Sandel s theory of justice has sufficient grounds to overcome the collectivist thesis. Additionally this study is to justify that Sandel s theory of justice is more appropriate as a element of learning of communitarian theory of justice in the integrated social studies than the complex equality theory of M. Walzer, which was an element of learning of the 2009 revised national curriculum Ethics and Thought. .
CO₂ 규제 대응을 위한 다운사이징 개념의 1.7 Liter EU5 디젤엔진 개발
박성근(Sung Geun Park),허행표(Haeng Pyo Heo),윤석진(Seog Jin Yoon),전제록(Jerok Chun) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
In order to reach the goal of CO2 emission regulation in European market by 2012, Hyundai-Kia Motor has been developed the new diesel engine with downsizing concept for the purpose of substitution of 2.0 L engine on D-segment vehicles. The main development strategy is to find the optimized combustion matching with new chamber design, optimal injection- and enhanced turbocharging system including advanced intake management. Also extensive hardware investigation from aspects of friction reduction and thermal management has been performed to improve the fuel consumption. Through the sharing and modulation of parts with series platform it was possible to spread strategy with maximized synergies and also cost reduction. The new small displacement diesel engine with low fuel consumption characteristic is able to achieve the attractive driving performance, fulfill EURO-V emission regulation and also enough to estimate the potential of future emission standards.
공동주택 건식연도 내의 자연 대류를 고려한 열-유동 해석
박성근(Sung-Geun Park),김명수(Myoung Su Kim),최형권(Hyoung Gwon Choi),용호택(Ho-Taek Yong),김동윤(Dong Yoon Kim) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
In this paper, the heat and fluid flow analysis in both a dry and a wet shaft of an apartment has been performed and compared with each other in order to investigate the pressure distribution inside the shaft considering both natural and forced convection. It has been shown that the present CFD approach can be used for the estimation of the capacity of roof ventilator of an apartment. Furthermore, detailed flow patterns inside a shaft have been examined for some operating conditions of hood system for both dry and wet shaft.
키케로 공화주의의 도덕 교육 적용에 관한 연구 : 혼합정과 자연법 개념을 중심으로
박성근(Sung-Geun Park) 한국도덕교육학회 2020 道德敎育硏究 Vol.32 No.1
2015 개정 교육과정 「윤리와 사상」에서 공화주의가 처음 도입되면서, 신로마 공화주의의 원류(源流)로 평가받는 키케로의 공화주의에 대한 관심이 높아지고 있다. 그러나 키케로 공화주의에 대한 높은 관심과 중요성에 비해, 아직 도덕 교육에서 그의 공화주의에 대한 연구 실적은 양적으로나 질적으로 그리 많지 않은 실정이다. 이에 본 연구는 도덕 교육에 키케로 공화주의를 적용하기 위한 이론적 토대를 탐구하고자 한다. 구체적으로 본 연구는 키케로 공화주의의 핵심 개념인 혼합정과 자연법 개념을 중심으로 그의 공화주의를 재구성한다. 이를 바탕으로 본 연구는 2015 개정 교육과정 「윤리와 사상」 5종 교과서의 키케로 공화주의 관련 서술을 분석하고, 차기 교육과정에 적용할 수 있는 키케로 공화주의의 교과서 서술 예시를 제안한다. Republicanism was first introduced in the 2015 revised curriculum Ethics and Thoughts. Accordingly, there is a growing interest in Cicero s republicanism, which is regarded as the source of neo-roman republicanism. However, A study on Cicero s republicanism in moral education has not been quantitatively or qualitatively compared to the high interest and importance of Cicero republicanism. Therefore, this study is to explore the theoretical foundation for applying Cicero’s republicanism to moral education. Specifically, this study reconstructs his republicanism around the concept of mixed government and natural law, the core concepts of Cicero republicanism. This study analyzes the description of Cicero republicanism in five textbooks of Ethics and Thoughts in the 2015 revised curriculum based on the result of reconstruction, and proposes an example of textbook description of Cicero republicanism that can be applied to the next curriculum.
노인에서 대장 내시경 선별 검사의 임상적 효용성: 대한장연구학회 다기관 공동연구
박성근 ( Sung Geun Park ),박동일 ( Dong Il Park ),김영호 ( Young Ho Kim ),김현수 ( Hyun Soo Kim ),김원호 ( Won Ho Kim ),김태일 ( Tae Il Kim ),김효종 ( Hyo Jong Kim ),양석균 ( Suk Kyun Yang ),변정식 ( Jeong Sik Byeon ),이문성 ( Moo 대한장연구학회 2008 Intestinal Research Vol.6 No.1
Background/Aims: Currently, screening colonscopy is widely performed in the medical field. The initial time of screening is recommended at an age of 50 years, but the age to cease screening is unknown. Accordingly, we have investigated the diagnostic yield of colonoscopy according to indications in the elderly, and we evaluated if screening colonoscopy is useful in the elderly. Methods: We recruited asymptomatic individuals undergoing screening colonoscopy according to age (2830 subjects aged 50-74 years and 111 subjects ≥75 years-old), The colonoscopy findings of the study subjects were compared. In addition, colonoscopy findings of asymptomatic subjects more than 75 years-old were compared with the findings of symptomatic subjects with the same age. Results: The yield for overall neoplasia and advanced adenoma was higher in the group of subjects ≥75 years-old than in the 50-74 years age group (overall adenoma: 49.54% versus 24.98%, p<0.001; advanced adenoma: 16.2% versus 8.23%, p=0.003). The overall frequency of neoplasms was higher in asymptomatic subjects ≥75 years-old than in symptomatic subjects ≥75 years-old (49.54% versus 28.19%, p<0.001). Conclusions: The prevalence of advanced adenoma increased with age. Screening colonoscopy was still significantly effective in elderly subjects ≥75 years-old. The lack of a decline in the frequency of adenoma, including advanced adenoma, justifies continuing screening colonoscopy in the elderly. (Intest Res 2008;6:25-30)