• 한국측량학회지
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• 제30권6_1호
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• pp.559-565
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• 2012

본 연구에서는 BIM과 GIS간 공간정보 상호 운용성을 위해 BIM과 GIS의 대표적인 중립 모델인 IFC와 CityGML간의 상호 운용성을 위한 속성 정보 맵핑을 위한 규칙 정의 메타 데이터를 제안하고 구현 한다. 이를 위해 IFC와 CityGML의 맵핑을 위한 구조를 분석하고 이를 바탕으로 BIM과 GIS간 정보 상호 운용성을 위한 속성 정보 맵핑을 위한 메타 데이터를 제안한다. 메타 데이터는 BIM 모델과 GIS 모델 간의 연결을 위한 연결 정보, 관점 별 맵핑 규칙, 맵핑 규칙을 정의한 연산자와 속성 정의로 구성된다. 이 구조를 설계하고 XML로 표현하였으며, 이를 이용해 속성 정보를 자동 맵핑하는 시스템을 구현하였다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2005년도 봄학술 발표회 논문집(II)
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• pp.425-428
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• 2005

In this study, the experiment was carried out to investigate and analyze the strength properties and flowability of concrete using meta kaolin. The main experimental variables were water/binder ratio 40.0$\%$, water content 170kg/$m^{3}$ and mineral admixtures such as slag powder, silica fume and meta kaolin. According to the test results, the principle conclusions are summarized as follows. 1) The flowing property of concrete that uses meta kaolin appears to be the same to that of the silica fume concrete, but the slump flow that evaluates the compaction ability of concrete shows the most favorable performance. 2) The air content of the concrete that uses meta kaolin can be effectively controlled for the target performance in compliance with the use of AE agent. 3) When it comes to the strength of concrete that uses meta kaolin, the most favorable development of strength occurs when the replacement rate is 10$\%$, in case of the silica fume, and the slag power. In addition, as the replacement rate increases, so becomes the development of concrete strength favorable.

• 한국기계가공학회지
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• 제18권3호
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• pp.74-81
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• 2019

Herein, we performed a comparative study on approximate multi-objective design optimization, to realize a structural design to improve the weight and vibration performances of the knuckle - a car suspension component - considering various load conditions and vibration characteristics. In the approximate multi-objective optimization process, a regression meta-model was generated using the response surfaces method (RSM), while Kriging and back-propagation neural network (BPN) methods were applied for interpolation meta-modeling. The Pareto solutions, multi-objective optimal solutions, were derived using the non-dominated sorting genetic algorithm (NSGA-II). In terms of the knuckle design considered in this study, the characteristics and influence of the meta-model on multi-objective optimization were reviewed through a comparison of the approximate optimization results with the meta-models and the actual optimization.

• Restorative Dentistry and Endodontics
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• 제46권3호
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• pp.37.1-37.11
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• 2021

Objectives: This systematic review evaluated the efficacy of the supplementary use of the XP-endo Finisher on bacteria content reduction in the root canal system. Materials and Methods: In-vitro studies evaluating the use of the XP-endo Finisher on bacteria content were searched in four databases in July 2020. Two authors independently screened the studies for eligibility. Data were extracted, and risk of bias was assessed. Data were meta-analyzed by using random-effects model to compare the effect of the supplementary use (experimental) or not (control) of the XP-endo Finisher on bacteria counting reduction, and results from different endodontic protocols were combined. Four studies met the inclusion criteria while 1 study was excluded from the meta-analysis due to its high risk of bias and outlier data. The 3 studies that made it to the meta-analysis had an unclear risk of bias for at least one criterion. Results: No heterogeneity was observed among the results of the studies included in the meta-analysis. The study excluded from the meta-analysis assessing the bacteria counting deep in the dentin demonstrated further bacteria reduction upon the use of the XP-endo Finisher. Conclusions: This systematic review found no evidence supporting the supplementary use of the XP-endo Finisher on further bacteria counting the reduction in the root canal.

• 한국IT서비스학회지
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• 제13권1호
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• pp.71-86
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• 2014

This study investigated knowledge browsing behavior as the factor affecting the increase of knowledge sharing intention. To conduct this study in the specific context of knowledge seeking and sharing behavior of virtual community members, literature on knowledge seeking behavior, meta-knowledge, and knowledge sharing intention was reviewed. Structural Equation Modeling was conducted to analyze survey data to test the research model of this study. The result showed that knowledge browsing have positive effects on creating of virtual community members' subject knowledge and meta-knowledge, which, in turn, affected positively their knowledge sharing intention. One of the main contributions of this study is that knowledge seeking behavior influence one's knowledge sharing intention in a virtual community. Organization managers should consider knowledge seeking behavior as not only a self-interested, consuming activity, but also a productive one through its function of constructing subject knowledge and meta-knowledge.

• International Journal of Contents
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• 제16권3호
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• pp.18-32
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• 2020

The aim of this study was to perform a meta-analysis of the learning outcomes of immersive learning technologies in English language teaching (ELT). This study examined 12 articles, yielding a total of 20 effect sizes. The Comprehensive Meta-Analysis (CMA) program was employed for data analysis. The findings revealed that the overall effect size was 0.84, implying a large effect size. Additionally, the mean effect sizes of the dependent variables revealed a large effect size for both the cognitive and affective domains. Furthermore, the study analyzed the impact of moderator variables such as sample scale, technology type, tool type, work type, program type, duration (sessions), the degree of immersion, instructional technique, and augmented reality (AR) type. Among the moderators, the degree of immersion was found to be statistically significant. In conclusion, the study results suggested that immersive learning technologies had a positive impact on learning in ELT.

• Asian Pacific Journal of Cancer Prevention
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• 제15권21호
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• pp.9241-9247
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• 2014

Background: Rs31489 in the cleft lip and palate transmembrane1-like gene (CLPTM1L) has been identified to be associated with lung cancer through genome-wide association studies (GWAS). However, some recent replication studies yielded inconclusive results. Thus, we undertook this study to investigate the precise effect of rs31489 on lung cancer susceptibility. Materials and Methods: A hospital-based case-control study in 1,673 Chinese subjects (611 individuals with lung cancer and 1,062 controls) and a meta-analysis among 32,199 subjects (16,364 cases and 15,835 controls) were performed in this study. Results: In our case-control study, rs31489 was inversely associated with lung cancer (AC versus CC: OR=0.68, 95%CI=0.52-0.88; additive model: OR=0.68, 95%CI=0.54-0.85; dominant model: OR=0.65, 95%CI =0.51-0.84). Stratification analysis by smoking status showed a significant association and strong genetic effect in non-smokers but not in smokers. Our meta-analysis further confirmed the association, although with significant heterogeneity contributed by study design and source of controls, as shown by stratified analysis. Sensitive and cumulative analyses both indicated robust stability of our results. In addition, there was no observable publication bias in our meta-analysis. Conclusions: Overall, the findings from our replication study and meta-analysis demonstrated that CLPTM1L gene rs31489 is significantly associated with lung cancer.

• Clinical Nutrition Research
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• 제13권1호
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• pp.74-87
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• 2024

Since the effects of cinnamon supplementation on lipid profiles are still controversial, this study conducted a meta-analysis of randomized controlled trials to assess the effect of cinnamon supplementation on lipid profiles. The study was designed and conducted according to the guidelines of the 2020 preferred reporting items for systematic reviews and meta-analysis (PRISMA) statements. A systematic and comprehensive search was performed in several databases from inception up to 11 November 2023. The meta-analysis on the impact of Cinnamon on lipid profiles indicates a non-significant overall effect on low-density lipoprotein (weighted mean differences [WMD], -2.48; 95% confidence interval [CI], -9.70, 4.72). However, significant reductions are seen with doses < 500 mg/day (-10.26), and non-significant increases with doses ≥ 500 mg/day (1.18). The overall effect on high-density lipoprotein is non-significant (WMD, 3.97; 95% CI, -7.877, 15.831), showing varying responses at different doses. Triglycerides exhibit a significant overall reduction (WMD, -6.88; 95% CI, -12.62, -1.15), particularly in the < 500 mg/day group. The overall effect on cholesterol is non-significant (WMD, -4.314; 95% CI, -15.011, 6.384), with diverse responses at different doses. High heterogeneity underlines the importance of standardized study designs and further exploration of dosage-specific effects. Findings from this study suggest that cinnamon supplements might be beneficial to modulate the blood lipid profile.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 추계학술대회
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• pp.966-969
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• 2012

본 연구는 네트워크상에 분산된 데이터들의 이질적인 문제를 해결하고, 효율적인 데이터 통합을 위한 Topic Maps MetaData Registry(TMDR)기반의 쿼리 변환 기법을 제시한다. TMDR은 분산 데이터를 통합하기 위해 글로벌 스키마를 제공하여 각 로컬 데이터에서 발생하는 정보들 사이의 이질성 문제를 쿼리 변환 기법으로 해결한다. 이 기법은 eXtended Meta Data Registry(XMDR)의 Meta Schema Ontology(MSO)와 Topic Maps에서 연관 관계를 분석하여 로컬의 접근 정보를 관리하는 Meta Location(ML)의 정보를 통해 분산되어 있는 로컬 데이터들을 통합 접근할 수 있도록 한다. 처리방법은 TMDR을 이용하여 전역처리를 위한 글로벌 쿼리를 생성하고, 생성된 글로벌 쿼리는 로컬 스키마로 분해되어 네트워크를 통해 분산되어 있는 시스템들을 접근하도록 함으로써, 통합 접근이 가능하게 한다. 우리는 이를 위해 글로벌 쿼리를 로컬에 적응적인 쿼리로 변환하는 방안을 제안한다.

• 기술혁신학회지
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• 제12권1호
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• pp.113-136
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• 2009

국가 연구개발사업의 효율성과 생산성을 제고하기 위하여, 정부에서는 '국가연구개발사업 등의 성과 평가 및 성과관리에 관한 법률'을 제정하여 정부 각 부처의 연구개발 사업 성과의 효율성을 증대시키고 있다. 본 논문은 국방연구개발사업 자체평가시스템 측면에서 메타평가를 실시하기 위하여 요인분석(Factor Analysis)을 통한 계층분석적 의사결정기법(AHP, Analytic Hierarchy Process)을 사용한 평가지표를 개발한 결과이다. 국방연구개발사업의 메타평가를 위한 평가요소로서 평가상황, 평가투입, 평가수행, 평가결과 등 4요소로 구분하여 평가지표를 개발하였다. 평가항목 선정을 위하여 평가요소 및 평가지표간 요인분석을 실시하여 Cronbach's ${\alpha}$ 값을 측정한 결과, 평가상황요소는 0.877, 평가투입요소는 0.755, 평가결과요소는 0.792, 평가결과요소는 0.906으로 내적일관성을 고려한 신뢰성은 있는 것으로 나타났다. 그리고 평가요소 및 평가항목별 가중치 산정은 AHP기법을 사용하여 분석하였다. 분석결과 조사자의 전체 일관성 지수는 0.09로 조사자의 일관성은 있는 것으로 분석되었다.