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정석희,안영호,오상은,Junho Lee,Kyu Taek Cho,Young-JinKim,Myeong Woon Kim,심준목,강문성 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.10
Understanding exoelectrogenic reactions of the bioanode is limited due to its complexity and the absence of analytics. Impedance and thermodynamics of bioanode, abiotic anode, and riboflavin-amended anode were evaluated. Activation overpotential of the bioanode was negligible compared with that of the abiotic anode. Impedance spectroscopy shows that the bioanode had much lower charge transfer resistance and higher capacitance than the abiotic anode in low frequency reaction. In high frequency reaction, the impedance parameters, however, were relatively similar between the bioanode and the abiotic anode. At open-circuit impedance spectroscopy, a high frequency arc was not detected in the abiotic anode in Nyquist plot. Addition of riboflavin induced a phase angle shift and created curvature in high-frequency arc of the abiotic anode, and it also drastically changed impedance spectra of the bioanode.
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간호윤리 교육에서 영화 및 역할극의 이용가능성 및 효과성 비교
정석희,신자현 한국의료윤리학회 2015 한국의료윤리학회지 Vol.18 No.3
본 연구는 미래의 의료인인 간호대학생들을 위한 간호윤리 교육에 효과적인 교수학습방법 모색을 위하여 영화 및 역할극의 이용가능성과 효과성을 비교하기 위하여 혼합연구설계(mixed method research design)를 이용하여 실시되었다. 연구대상자는 J도 소재 일개 간호대학에서 2013년부터 2015년까지 간호윤리 교과목을 수강한 4학년 간호대학생 137명이다. 양적 자료 분석은 IBM SPSS WIN 19.0 프로그램을 이용하였으며 질적 자료는 내용분석 방법을 이용하였다. 연구결과 영화가 역할극에 비해 윤리적 의사결정능력 향상을 위한 간호윤리 교육에 딜레마 사례로써 이용가능성, 효과성, 의사결정능력 향상 도움정도, 교육자로서 이 방법을 이용할 의도, 타인에게 이용을 추천할 의도 및 전체평균에서 통계적으로 유의하게 높게 나타났다. 질적 자료 분석에서는 대상자들의 경험을 통해 다양한 영화 및 역할극의 장ㆍ단점, 이용소감 및 고려사항들이 제시되었다. 본 연구결과는 간호대학생 및 간호사들의 윤리적 의사결정능력 향상을 위한 효과적인 간호윤리 교육프로그램 제공을 위한 교수학습방법 개발에 유용하게 이용될 수 있을 것이다. This study was designed to compare the availability and effectiveness of both cinema and role-playing as teaching-learning methods in nursing ethics education. A mixed-method research design combining a survey and content analysis was conducted. Data were collected from 2013 to 2015. Participants were 137 senior undergraduate nursing students in a college of nursing in South Korea. Both the cinema and role-playing methods showed high degrees of availability and effectiveness in nursing ethics education. Cinema showed the statistically significantly higher levels of availability, effectiveness, helpfulness for improving ethical decision-making, intention to use, and intention to recommend. The results of this study show that cinema may be a more useful and effective teaching-learning method for nursing ethics education. These findings can be used in developing effective teaching-learning methods for nursing and medical educators in order to improve the decision-making abilities of students and health care providers.
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정석희,강호정 한국미생물학회 2014 The journal of microbiology Vol.52 No.7
It is important to estimate the true microbial diversities accuratelyfor a comparative microbial diversity analysis amongvarious ecological settings in ecological models. Despitedrastically increasing amounts of 16S rRNA gene targetingpyrosequencing data, sampling and data interpretation forcomparative analysis have not yet been standardized. Formore accurate bacterial diversity analyses, the influences ofsoil heterogeneity and sequence resolution on bacterial diversityestimates were investigated using pyrosequencingdata of oak and pine forest soils with focus on the bacterial16SrRNA gene. Soil bacterial community sets were phylogeneticallyclustered into two separate groups by forest type. Rarefaction curves showed that bacterial communities sequencedfrom the DNA mixtures and the DNAs of the soilmixtures hadmidsize richness compared with other samples. Richness and diversity estimates were highly variable dependingon the sequence read numbers. Bacterial richness estimates(ACE, Chao 1 and Jack) of the forest soils had positivelinear relationships with the sequence read number. Bacterialdiversity estimates (NPShannon, Shannon and the inverseSimpson) of the forest soils were also positively correlatedwith the sequence read number. One-way ANOVA showsthat sequence resolution significantly affected the α-diversityindices (P<0.05), but the soil heterogeneity did not (P>0.05). For an unbiased evaluation, richness and diversity estimatesshould be calculated and compared from subsets of the samesize.
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