• Restorative Dentistry and Endodontics
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• 제46권2호
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• pp.19.1-19.12
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• 2021

Objectives: The purpose of this study was to conduct a systematic review and meta-analysis of in vitro studies regarding the effectiveness of reciprocating and rotary instrumentation on microbial reduction in root canals. Materials and Methods: PubMed, Scopus, Web of Science, the Cochrane Library, and the gray literature were searched through December 2019. Studies comparing the influence of reciprocating and rotary instrumentation on the removal of microorganisms from root canals that quantified the antimicrobial effect were included. Data extraction was completed using a systematic form for data collection. The risk of bias of the studies was evaluated. Standardized mean differences (SMDs) and confidence intervals (CIs) were calculated using a random effects meta-analysis. Results: Seventeen in vitro studies were included in this systematic review, of which 7 provided adequate data for inclusion in the meta-analysis. Both reciprocating and rotary systems were similarly effective in reducing the microbial load in infected root canals (SMD [95% CI], 0.0481 [-0.271, 0.367]). Three studies showed a low risk of bias, whereas most of the studies (82%) presented a medium risk. Conclusions: Although both techniques decrease the microbial content (with reductions of 23.32%-88.47% and 23.33%-89.86% for reciprocating and rotary instrumentation, respectively), they are not able to provide complete disinfection of root canals.

• 한국정보통신학회논문지
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• 제10권12호
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• pp.2212-2220
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• 2006

최근 기업들은 레거시 시스템들간의 데이터 상호 운용하기 위해 기업들은 이미 보유하고 있는 레거시 업무와 EAI 시스템을 도입하고 있다. 협업적인 거래 환경에서의 EAI 시스템은 유기적으로 통합하고 공유함으로서 효율적인 검색을 기대할 수 있다. 그러나 기존 레거시 시스템은 특정 목적에 따라 설계단계부터 상호 운용성을 고려하지 않고 독자적으로 관리되므로 EAI는 표준기술 적용이 어려우므로 별도의 전용 EAI 솔루션을 도입해야 한다. 이러한 문제를 해결하기 위해 데이터 통합을 이용하여 메타데이터 레지스트리를 이용한다. 그러나 메타데이터의 다양한 타입과 의미론적 명세, 데이터 이질성 문제, 이기종간의 시스템 이질성에 대한 문제도 야기된다. 따라서 본 논문에서는 웹 환경에서 데이터 상호운용을 위한 XMDR(eXtended Meta-Data Registry) 기반의 검색 시스템을 제안한다.

• 아동학회지
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• 제36권2호
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• pp.167-182
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• 2015

This study created a structural model of the influence of paternal and maternal meta-emotion philosophy and children's emotion regulation in terms of their social competence and confirmed the nature of the relationship among the variables. For the purpose of this study, data was collected, targeting 363 children in the $5^{th}$ and $6^{th}$ elementary school grades from schools located in Seoul. The main results of this study were as follows: First, both paternal and maternal meta-emotion philosophy had an influence on children's emotion regulation and emotion dysregulation. Next, paternal and maternal meta-emotion philosophy did not appear to have a significant influence on children's social competence in a direct manner. The complete mediation effect of emotion regulation in regards to the influence of paternal and maternal meta-emotion philosophy upon children's social competence was confirmed. It was also found that parental meta-emotion philosophy had an influence upon children's social competence in an indirect manner through children's emotion regulation in the period of middle childhood.

• 한국정보통신학회논문지
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• 제13권8호
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• pp.1637-1646
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• 2009

현재 데이터 통합을 위한 다양한 방법이 연구되고 있다. 연구된 통합 방법들 중 메타데이터저장소를 이용하는 방안과 데이터 간의 관계성을 파악한 토픽맵이 있다. 본 논문은 메타데이터와 토픽맵 기술을 적용하여 검색 키워드에 대한 토픽맵 생성을 위한 메타-토픽맵을 제안하고, 메타-토픽맵과 레거시 시스템의 메타데이터를 연계하기 위한 방안으로 XMDR을 제안한다. 메타-토픽맵은 레거시 시스템에서 키워드에 대한 의미적 연관성을 고려하여 토픽맵 형식을 제공하여 키워드에 대한 토픽맵을 생성한다. XMDR은 레거시 시스템의 메타데이터 간의 이질성을 해결하여 구조적 통합을 수행한다. 제안된 시스템은 레거시 시스템에 구축된 기존의 관계데이터베이스간의 상호운용과 검색 효율을 높이고, 시스템 확장에 효율적이다.

• Journal of Korean Neurosurgical Society
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• 제63권5호
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• pp.550-558
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• 2020

To perform a systematic review of the data collected from case-control studies conducted earlier to investigate the correlation between E-selectin S128R polymorphism and ischemic stroke (IS) risk among the Chinese population. The PubMed, Web of Science, Chinese biomedical literature database (CBM), Chinese databases China National Knowledge Infrastructure (CNKI), WanfangData knowledge service platform (Wanfang Data), and information resource integration service platform (VIP) Databases were searched to retrieve case-control studies on the correlation between E-selectin gene S128R polymorphism and IS from the inception of the database till June 2019. The literature was screened, data were extracted, the risk of bias was reviewed, and the studies included were assessed independently by two reviewers. Stata ver. 12.0 software (Stata Corp LLC, College Station, TX, USA) was used to perform the meta-analysis. A total of 2907 cases from eight case-control studies involving 1478 IS patients and 1429 controls were included in this study. The R allele and RS genotype in E-selectin were found to be associated with the risk of IS as per the results of the meta-analysis (R vs. S : odds ratio [OR], 2.75; 95% confidence interval [CI], 2.15-3.51; p<0.00001; RS vs. SS : OR, 2.50; 95% CI, 1.95-3.19; p<0.00001; RR+RS vs. SS : OR, 2.85, 95% CI, 2.21-3.67; p<0.00001). The E-selectin gene S128R polymorphism is likely related to IS based on the results of a meta-analysis in the Chinese population, and the R allele and RS genotype of E-selectin may be IS risk factors.

• Asian Pacific Journal of Cancer Prevention
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• 제14권7호
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• pp.4283-4287
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• 2013

Background: In this meta-analysis we review evidence suggesting that exposure to cadmium is a cause of breast cancer. Materials and Methods: We conducted Medline/PubMed and Scopus searches using selected MeSH keywords to identify papers published from January 1, 1980 through January 1, 2013. Data were merged and summary mean differences were estimated using either a random-effects model or a fixed-effects model. Results: There were 13 studies including 978 exposed cases and 1,279 controls. There was no statistically significant difference in the frequencies of breast cancer between cadmium-exposed and control groups, and the summary estimate of mean difference was 0.71 (95%CI: 0.33-1.08). However, stratification showed that there were statistically significant differences in the frequencies of breast cancer between cadmium-exposed and control groups among Asian compared with Caucasian population, and the summary estimates of mean difference were 1.45 (95%CI: 0.62-2.28) vs. 0.25 (95%CI: -0.09-0.6), respectively. There was a difference in the frequencies of breast cancer between cadmium-exposed and control groups in peripheral venous blood sampling methods, and the summary estimate of mean difference was 1.41 (95%CI: 0.46-2.37). Conclusions: Data indicate that the frequencies of breast cancer might be an indicator of early genetic effects for cadmium-exposed populations. However, our meta-analysis was performed on population-based studies; meta-analysis based on individual data might provide more precise and reliable results. Therefore, it is necessary to construct an international database on genetic damage among populations exposed to cadmium that may contain all raw data of studies examining genetic toxicity.

• 한국정보처리학회논문지
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• 제7권6호
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• pp.1746-1752
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• 2000

In this paper, a cache mechanism is proposed to improve the speed of query processing in distributed director database systems. To decrease search time of requested objects and query processing time. query requests and results about objects in a remote site are stored in the cache of a local site. Cache system architecture is designed according to the classified information. Cache schema are designed for each cache information. Operational algorithms are developed for meta data cache which has meta data tree. This tree improves the speed of query processing by reducing the scope of search space. Finally, performance evaluation is performed by comparing the proposed cache mechanism with X500.

• 디지털산업정보학회논문지
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• 제8권1호
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• pp.221-229
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• 2012

A model for expressing meta data syntax in the eXtensible Markup Language(XML) was developed to increase the portability of the Arden Syntax in medical treatment. In this model that is Arden syntax uses two syntax checking mechanisms, first an XML validation process, and second, a syntax check using an XSL style sheet. Two hundred seventy-seven examples of MLMs were transformed into MLMs in ArdenML and validated against the schema and style sheet. Both the original MLMs and reverse-parsed MLMs in ArdenML were checked using a Arden Syntax checker. The textual versions of MLMs were successfully transformed into XML documents using the model, and the reverse-parse yielded the original text version of MLMs.

• 한국어교육
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• 제23권1호
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• pp.25-45
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• 2012

The purpose of this article is to examine types and construction method of multimedia materials for the Korean language education, finally in order to construct digital library on Nuri-Sejonghakdang. Firstly, this article reviews some major concepts such as teaching material, multimedia, learning object, meta-data, reusability, etc. Secondly, various multimedia materials are divided into three types(namely, example material, explanation material, training and evaluating material) according to their characteristics as a learning objects. And then, this article tries to propose the classification-search system and meta-data elements for effective search and use of multimedia materials. Finally, this article is concluded by presenting the long-term plan of digital library construction on Nuri-Sejonghakdang and some follow-up task of this study.

• 산업경영시스템학회지
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• 제23권56호
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• pp.19-34
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• 2000

Impact of business process re-engineering requires the fundamental rethinking of how information systems are analyzed and designed. It is no longer sufficient to establish a monolithic system for fixed business environments. Information systems must be adaptive in nature. This demand is also applied in production domain. Enabling concept for the adaptive information system is reusability. This paper presents a new object-oriented analysis process for creating such reusable software components in production domain, especially for production planning and scheduling. Our process called MeCOMA is based on three meta-models: physical object meta-model, data object meta-model, and activity object meta-model. After the three meta-models are extended independently for a given production system, they are collaboratively integrated on the basis of integration pattern. The main advantages of MeCOMA are (1) to reduce software development time and (2) to consistently build reusable production software components.