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정민석 대한영상의학회 1995 대한영상의학회지 Vol.32 No.4
Purpose : To evaluate normal variations and thus to avoid confusion in differentiation form lesions of theaccessory structures (rhomboid fossa, foramen for supraclavicular nerve, conoid tubercle) of the clavicle in chestradiographs. Materials and Methods : We studied the variations of the clavicle in 300 chest radiographs (134 men,166 women) and 355 dry bones (right 166, left 189 ; 151 men, 74 women, 130 unknown sex). Results : In chestradiographs, the incidence of the depressed rhomboid fossa was 229 cases (39.5%;male 52.0%, female 29.9%); theflat type was 329 cases (56.9%;male 45.7%, female 65.7%); and the elevated type was 20 cases (3.5%;male 2.4%,female 4.3%). In the dry bones, the incidence of the depressed rhomboid fossa was 129 cases (57.3%;male 59.6%,female 52.7%); the flat type was 65 cases (28.9%;male 24.5%, female 37.8%) and the elevated type was 31 cases(13.8%;male 15.9%, female 9.5%). The incidence of the foramen for supraclavicular nerve was 0.8% in chestradiographs, and 1.4% in the dry bones. The incidence of the elevated conoid tubercle was 64.1% (male 64.0%,female 65.9%) in chest radiographs, and 96.9% (male 95.4%, female 100.0%) in the dry bones. Conclusions : Theincidence of the depressed rhomboid fossa in chest radiographs was higher in men and the right clavicle. Theincidence of flat rhomboid fossa in chest radiographs decreased according to increase of age. The foramen forsupraclavicular nerve was occasionally found (0.8% in chest radiographs; 1.4% in the dry bones).
연료전지 및 바나듐 흐름전지 용 폴리설폰 소재 기반 음이온 교환막
정민석,Christopher Arges,Javier Parrondo,Vijay Ramani 한국막학회 2016 한국막학회 총회 및 학술발표회 Vol.2016 No.11
The water uptake, ionic conductivity, vanadium (VO2+) permeability and stability of polysulfone (PSF) based AEMs in alkaline media and in strongly oxidizing solutions were assessed. The highest ion conductivity was obtained with PSF-trimethylammonium (TMA)+. PSF-TMA+ also had better alkaline stability in comparison to PSF-AEM with different bases. PSF-TMA+ was demonstrated to show fuel cell performance. PSF-TMA+ demonstrated a 40-fold reduction in vanadium (VO2+) permeability when compared to Nafion® membrane. Comprehensive 2D NMR studies verified that PSF-TMA+ remained chemically stable even after exposure to a 1.5 M vanadium(V) solution for 90 days. Excellent energy efficiencies (85%) were attained and sustained over several charge–discharge cycles for a vanadium redox flow battery prepared using the PSF-TMA+ separator.
정민석,고호경,Cheong, Minseok,Ko, Ho Kyoung 영남수학회 2018 East Asian mathematical journal Vol.34 No.4
There is currently a growing need to nurture creative and convergent talent in the face of the fourth Industrial Revolution. Developing such talent requires interdisciplinary convergent education across the science, engineering, humanities, social studies, and arts disciplines. Such interdisciplinary convergence could cultivate humanities and social knowledge and qualities along with scientific expertise. In Korea, there are currently six science schools for the gifted that aim to discover and nurture science, technology, engineering, and mathematics (STEM) researchers from an early stage, and two science and art schools for the gifted that aim to cultivate new talent combining students' scientific and artistic qualities. These schools establish and follow curriculums that are suited to achieving the education objectives guaranteed by the Gifted Education Promotion Act and its Enforcement Decrees. This study compares the curriculums and curriculum tables of the science schools for the gifted to those of the science and art schools for the gifted to evaluate their methods of operation and performance. Additionally, it determines which curriculums provide an opportunity for students to nurture convergent thinking, and discusses how suitable curriculums could be implemented to develop convergent thinking.
재난에 대한 태도와 당파적 감정: 2022년 이태원 참사를 중심으로
정민석,이수진,이현우 명지대학교(서울캠퍼스) 미래정치연구소 2023 미래정치연구 Vol.13 No.1
본 연구는 재난에 대해 정부의 책임을 묻는 태도가 당파적 감정(정당일체감)의 영향을 받았는지를 분석하는 것을 목적으로 한다. 재난은 비정치적이고 예상치 못하게 일어난 사건이기 때문에, 선행 연구들은 정부의 재난 대응에 대해 시민들이 인지적으로 평가해서 이를 정치행태에반영하는 것으로 봤다. 하지만 여기에도 당파적 감정이 개입했다는 분석이 제기된 바 있다. 본연구는 2022년 이태원 할로윈 참사를 사례로, 재난에 대한 태도를 종속변수로 해서 당파적 감정의 영향을 분석했다. 분석을 위해 전국의 1,008명을 대상으로 한 개인 수준의 조사 데이터를활용했다. 분석 결과, 첫째, 여당에 정당일체감을 가진 사람은 이태원 참사에 대해 정부에 대한비난을 통계적으로 유의미하게 회피하는 경향을 보였고, 그 실질적 유의미성은 정치적 이슈인북한의 미사일 도발에 대한 정당일체감의 영향보다 강한 것으로 나타났다. 둘째, 여당에 정당일체감을 가진 사람은 이태원 참사의 정부 내 책임 소재로 대통령을 회피해서 다른 기관에 전가하는 모습을 보였다. 이러한 발견은 유권자의 회고적 판단을 근거로 선거를 통해 정부에 책임성을 부과한다는 합리적 선택의 근본 메커니즘이 당파적 감정에 의해 훼손되고 있음을 시사한다.