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정동욱,임종철,주인곤,황성필 한국방재학회 2013 한국방재학회논문집 Vol.13 No.4
There are many problems about safety of many ground or underground structures, when we excavate tunnels in downtown area. Therefore, it is necessary to rise the stability considering the special condition. This paper uses micro pile that has eco-friendly,low noise and low vibration to slove the above problems. The paper analyzes settlements of earth surface, displacements of piles and crown settlements that is measured 321 section in the tunnel of Busan subway line 3 In order to examine the effect of micro piles. And this paper compares the measured data and numerical analysis to examine the effect on the angle and length of micro piles. 도심지에서 터널시공시 지상 또는 지하 내에 존재하는 많은 구조물의 안정성에 관한 중요성이 언급되고 있다. 그러므로 각 현장의 특수한 상황을 고려하여 안정성을 확보하는 것이 필요하다. 본 연구에서는 친환경적이며, 저소음, 저진동 공법인 마이크로파일 공법을 적용하여 상기의 문제점을 해결하고자 한다. 마이크로파일의 효과를 분석하기 위해 부산지하철 3호선 굴착과정에서 계측된 지표침하와 말뚝의 변위, 터널내 변위 등을 분석하였으며, 마이크로파일의 각도와 설치길이에 관한 효과를 입증하기위해 현장계측자료와 수치해석을 비교하였다.
HPLC를 이용한 Alnus속 식물에서의 diarylheptanoids의 정량분석
정동욱,김준식,조수민,이연아,김광호,김세원,이민원 중앙대학교 약학연구소 1999 약학 논총 Vol.13 No.-
Quantitative determination of diarylheptanoids (oregonin and hirsutanonol), which were characteristic components of Alnus spp. has been conducted by High Performance Liquid Chromatography. The HPLC analysis was carried out using an YMC J'sphere ODS-H80 column [150×4.6mm, S-4μm. 80A(particle)] and a combination of acetonitrile and H2O was used as mobile phase in gradient solvent system. The results showed differnce in the species (Alnus japonica, A hirsuta and A. hirsuta var. sibirica)
정동욱 한국과학철학회 2018 과학철학 Vol.21 No.2
Predictivism argues that, other things being equal, success of prediction provides relatively better evidence for hypotheses than success of accommodation. This paper shows that bayesianism can be used to analyze the debate of prediction vs. accommodation, and provides bayesian analyses of two situations which seem suitable to predictivism. In my bayesian analyses, the apparent superiority of prediction over accommodation is just a by-product of high prior probability or high likelihood of hypotheses, so ‘prediction’ by itself cannot provide extra evidential weight for hypotheses. 예측주의는 다른 조건이 같다면 예측의 성공이 사후 포섭의 성공보다 상대적 으로 좋은 증거를 제공한다고 주장한다. 이 논문은 베이즈주의가 예측 대 포 섭 논쟁을 분석하는 데 적절하게 사용될 수 있음을 보이는 한편, 예측주의가 그럴듯해 보이는 두 가지 상황에 대한 베이즈주의적 분석을 제시한다. 나의 분석에따르면, 예측의겉보기효과는가설의높은사전확률또는높은가능 도에 의한 부산물로, ‘예측’ 자체가 증거적 뒷받침에 특별한 기여를 하는 것 은 아니다.
Shaping education policy research in an Asia-Pacific context
정동욱,이호준,이승호,위은주 서울대학교 교육연구소 2014 Asia Pacific Education Review Vol.15 No.3
Globalization increasingly calls for comparing educational policies across countries. In this study, we assemble and analyze academic journal publications of the past decade in order to shape education policy research within an Asia-Pacific context. After examining Asia-Pacific research publication data from the Web of Science, we find a few stylized facts: (1) increasing research collaboration, (2) growing policy evaluation research, (3) swelling empirical research with quantitative methodology and (4) growing attention to higher education. Moreover, education stakeholders show exclusive interest on globalization, private tutoring, and language education policies within and across countries. Finally, we find a significant difference in research impact and diffusion between Asia-Pacific and American education policy studies. Further, we examine what determines research impact and diffusion. Our results indicate that research collaboration, national context, publication year and issue, policy area, and research methodology are significantly associated with publication citations. Based on the findings, we suggest useful implications for future directions on education policy research in an Asia-Pacific context.