• 대한치과보철학회지
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• 제40권5호
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• pp.525-535
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• 2002

The purposes of this study were to evaluate the adherence of bacteria on various denture base resin materials and effects of chitosan, added to denture base materials on bacterial adherence. PMMA denture base resin such as heat-cured Vertex-RS, self-cured Vertex-SC and 4-META denture base resin such as heat-cured Meta-Dent, self-cured Meta-Fast were used in this study Samples were divided into two groups the denture base resin with chitosan, without chitosan Streptococcus mutans and Lactobacillus casei were used in this study. The surface of samples was observed by SEM. When chitosan was added to M17 and MRS broth, viable cell count of bacteria was reduced. Viable cell count of Streptococcus mutans on the samples decreased as follows : Meta-Dent, Vertex-SC, Meta-Fast, Vertex-RS. Viable cell count of Lactobacillus casei on the samples decreased as follows: Vertex-RS, Meta-Dent, Meta-Fast, Vertex-SC. The resin with chitosan showed lower adherence of bacteria than without chitosan. The images of SEM showed that the surface of the resin with chitosan was rougher than that of without chitosan. These results showed that the denture base resin materials with chitosan have rougher surface than without chitosan, but less bacteria adhered on them.

• 한국문헌정보학회지
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• 제42권1호
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• pp.45-61
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• 2008

메타분석(Meta-Analysis)이란 분석에 대한 분석(analysis of analysis)이란 의미로, 특정 연구문제에 대해 독립적으로 수행된 선행연구들의 일치하지 않은 결과들을 통합하여 결론을 내리기 위해 개개 연구의 분석결과들을 수학적으로 합성하여 통계적으로 결론을 내리는 방법이다. 본 연구는 메타분석의 특성과 기본원리, 분석 절차, 대표적인 분석모델을 소개하고, 문헌정보학분야에서의 메타분석연구를 고찰하였다. 다른 학문에 비해 문헌정보학에서 메타분석연구는 매우 소량 수행되었고 국내 문헌정보학분야에서는 전무한 상태이다. 문헌정보학에서 메타분석을 수행하는데 문제점과 메타분석연구를 활성화하기 위해 연구자가 보고서 작성시 유의해야 할 내용을 논의하였다.

• 대한통합의학회지
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• 제6권2호
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• pp.1-16
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• 2018

Purpose : This meta-analysis was aimed at guiding future research in stroke treatment and to provide real-world data relating to the effects of aquatic exercise therapy on balance in patients with chronic stroke. Methods : We performed a meta-analysis comprising 22 studies involving aquatic exercise therapy performed between 2006 and 2017. A meta-analysis software program was used to calculate the mean effect size, effect size by intervention, and effect size by outcome. We also performed a meta-regression analysis and an analysis of publishing bias. Results : The mean effect size was 0.563. The effect size by outcome was observed to be the largest for the functional reach test, followed by the Berg balance scale, balance equipment, the Timed Up and Go test and one leg standing. Meta-regression analysis showed that effect size increased with an increase in the duration, number, length of exercise session. Conclusion : Aquatic exercise therapy appears to show a moderate effect on balance in patients with chronic stroke. A meta-analysis is warranted for further research to determine the effects of aquatic exercise on walking, muscle strength, and range of motion.

• 대한간호학회지
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• 제50권6호
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• pp.757-777
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• 2020

Purpose: The purpose of this study was to identify the outcome variables of nursing unit managers' transformational leadership and to test a hypothetical model using meta-analytic path analysis. Methods: A systematic review and meta-analysis were conducted in accordance with PRISMA guidelines. Data analysis, conducted using R version 3.6.2 software, included 49 studies for the meta-analysis and 119 studies for meta-analytic path analysis. Results: In the meta-analysis, four out of 32 outcome variables were selected. These four variables were empowerment, nursing performance, job satisfaction, and organizational commitment, which showed larger effect sizes than the median and more than five k. The hypothetical model for the meta-analytic path analysis was established by using these four variables and transformational leadership. A total of 22 hypothetical paths including nine direct effects and 13 indirect effects were set and tested. The meta-analytic path analysis showed that transformational leadership had direct effects on the four variables. Finally, eight direct effects, 12 indirect effects, and six mediating effects were statistically significant, and the hypothetical model was verified. Conclusion: Nursing unit managers can use the transformational leadership to improve empowerment, nursing performance, job satisfaction, and organizational commitment of nurses. This study empirically showed the importance of transformational leadership of nursing managers. This finding will be used as evidence to develop strategies for enhancing transformational leadership, empowerment, nursing performance, job satisfaction, and organizational commitment in nursing science and practice.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제20권1호
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• pp.85-99
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• 2017

수학 문제해결 능력의 향상을 위한 연구의 일환으로 문제해결 활동 과정에 중요한 역할을 담당하는 것으로 최근에 파악된 메타정의를 수학 학습 지도에 적용하는 연구의 필요성이 제기되어왔다. 이에 본 연구에서는 긍정적인 메타정의의 기능을 활성화시키며 실제 문제해결 활동에 효과적으로 작용하는 것은 물론, 정의적 측면에 대한 연구방법론이 갖는 일반적인 난점의 극복을 위하여 협업의 상황을 설정하였다. 즉, 2인 1조의 소집단 구성원이 협업을 통하여 성공적인 문제해결 과정에 보여주는 메타정의적 요소에 대한 사회역학적 작용 과정의 특성을 분석하였다. 이를 위해 선행연구에서 파악된 메타정의의 메타적 기능 유형과 협업의 교류적 요소를 초등학생의 협업적 문제해결 활동 분석을 위한 준거로 삼았다. 소집단의 협업적 수학 문제해결 활동의 에피소드 단위별로 보여주는 메타정의의 메타적 기능 유형과 이와 결부된 교류적 요소의 구조 사례를 관찰, 분석하여 성공적인 문제해결로 유도하는 메타정의의 사회역학적 기능이 보여주는 특성을 추출하였다. 본 연구의 결과로부터 도출되는 메타정의의 사회역학적 작용 원리는 성공적인 수학 문제해결의 교수 학습 방법 구현을 위한 연구에 정의적, 사회역학적 측면에서 실제적인 시사점을 제공한다.

• 한국초등수학교육학회지
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• 제22권2호
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• pp.143-159
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• 2018

수학 문제해결 교육 연구에 있어서 문제해결 과정에 나타나는 인지적, 정의적 요소의 상호작용 및 메타정의적 측면에 대한 연구의 비중이 점차 증가하고 있다. 이에 본 연구에서는 수학 학습 성취 수준에 따라 초등학생의 문제해결 과정에 작용하는 메타정의의 기능적 특성을 파악하기 위하여 빈도 분석과 사례 분석을 병행하였다. 수학 학습 성취 수준에 따라 협업적 문제해결 활동에서 나타나는 메타정의 출현 빈도, 메타정의 유형별 빈도, 메타정의의 메타적 기능 유형별 빈도를 비교 분석하였다. 또한, 수학 학습 성취 수준별 메타정의의 메타적 기능 유형별 사례의 분석을 통하여 메타정의의 실제적인 작용 메카니즘을 파악하였다. 그 결과, 수학 학습 성취 하 수준 집단의 문제해결 과정에서 상 수준 집단에 비해 메타정의의 출현 비율이 상대적으로 높았으며, 상 수준 집단의 메타정의는 하 수준 집단에 비해 상대적으로 다양한 유형의 메타적 기능으로 작용하였다. 이와 같은 연구 결과로부터 수학 문제해결 수업에 적용해 볼 수 있는 메타정의의 기능적 특성과 관련한 교육적 시사점을 도출하였다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집C
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• pp.339-344
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• 2001

In recent engineering, the designer has become more and more dependent on the computer simulations such as FEM (Finite Element Method) and BEM (Boundary Element Method). In order to optimize such implicit models more efficiently and reliably, the meta-modeling technique has been developed for solving such a complex problems combined with the DACE (Design and Analysis of Computer Experiments). It is widely used for exploring the engineer's design space and for building meta-models in order to facilitate an effective solution of multi-objective and multi-disciplinary optimization problems. Optimization of a train suspension is performed according to the minimization of forty-six responses that represent ten ride comforts, twelve derailment quotients, twelve unloading ratios, and twelve stabilities by using the Kriging meta-model of a train suspension. After each Kriging meta-model is constructed, multi-objective optimal solutions are achieved by using a nonlinear programming method called SQP (Sequential Quadratic Programming).

• 지식경영연구
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• 제10권2호
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• pp.65-84
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• 2009

The purpose of this study is to develop Meta Evaluation Indicators for Defense R&D Programs in Korea. At first, the four components of this meta evaluation model were designed, which are evaluation context, evaluation input, evaluation process and evaluation outcome. And fifty two indicators for this meta evaluation were developed by experts who performed evaluations for Defense R&D Programs. The reliability of components and items was verified by Cronbach's ${\alpha}$ coefficient. It was over 0.6 in all areas. The validity of components and items was verified by Factor Analysis. Analytic Hierarchy Process method was used in assigning the evaluation weight. The survey of twenty two evaluators participated in Defense R&D Programs showed that the Consistency Ratio was under 0.1 in evaluation components and items. In this study, an objective and reasonable set of Defense R&D Meta Evaluation Indicators was developed to increase the responsibility of Defense R&D Programs and improve the quality of evaluation results.

• 한국염색가공학회지
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• 제25권4호
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• pp.262-270
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• 2013

Temporarily solubilized reactive disperse dyes containing ${\beta}$-sulfatoethylsulfonyl group were applied to 100% meta-aramid knitted fabric and their dyeing properties were investigated. Reactive disperse dyes showed relatively high K/S values on meta-aramid fabric when compared with conventional disperse dye or reactive dye, which showed very low K/S values. Color yields of reactive disperse dyes were highly dependent on dyeing pH and optimum results were obtained at pH 6. Percent exhaustion of reactive disperse dye on meta-aramid fabric was over 80% at 2% o.w.f of dye concentration. Wash fastness of pyridone-based reactive disperse dyes was very good to excellent while that of aminoazobenzene reactive disperse dyes was medium to good. Light fastness of all the reactive disperse dyes was very poor which seems to be due to the low photostability of meta-aramid fiber itself.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2003년도 춘계학술대회논문집
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• pp.107-113
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• 2003

Lately CBD methodologies like as CBD96, Catalysis, fusion, and SCIPIO have been introduced. These methodoloties has their own proprietary component reference model. Using proprietary reference model falls interoperability among methodologies. Furthermore it can cause confusion and difficulty for component developers. In this paper, we propose a integrated component meta-model for support consistency and interoperability among component designs. Also, we compare our proposed meta model to existing component reference model by using component's characteristics. We expect that it is easy to add new meta model elements and extends meta-model by using integrated component meta-model.