• 제목/요약/키워드: Meta Evaluation

검색결과 348건 처리시간 0.025초

Functional Requirements of Data Repository for DMP Support and CoreTrustSeal Authentication

  • Kim, Sun-Tae
    • International Journal of Knowledge Content Development & Technology
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    • 제10권1호
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    • pp.7-20
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    • 2020
  • For research data to be shared without legal, financial and technical barriers in the Open Science era, data repositories must have the functional requirements asked by DMP and CoreTrustSeal. In order to derive functional requirements for the data repository, this study analyzed the Data Management Plan (DMP) and CoreTrustSeal, the criteria for certification of research data repositories. Deposit, Ethics, License, Discovery, Identification, Reuse, Security, Preservation, Accessibility, Availability, and (Meta) Data Quality, commonly required by DMP and CoreTrustSeal, were derived as functional requirements that should be implemented first in implementing data repositories. Confidentiality, Integrity, Reliability, Archiving, Technical Infrastructure, Documented Storage Procedure, Organizational Infrastructure, (Meta) Data Evaluation, and Policy functions were further derived from CoreTrustSeal. The functional requirements of the data repository derived from this study may be required as a key function when developing the repository. It is also believed that it could be used as a key item to introduce repository functions to researchers for depositing data.

모바일 기기를 위한 정보검색 시스템 (Information Retrieval System for Mobile Devices)

  • 김재훈;김형철
    • Journal of Advanced Marine Engineering and Technology
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    • 제33권4호
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    • pp.569-577
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    • 2009
  • Mobile information retrieval is an evolving branch of information retrieval that is centered on mobile and ubiquitous environments. In general, mobile devices are characterized by lightweight, low power, small memory, small display, limited input/output, low bandwidth, and so on. Some of these characteristics make it impossible to apply general information retrieval to mobile environments without any modification. In order to relieve this problem, we design and implement an information retrieval system for mobile devices like wireless phones, PDA and handheld devices. We use document summarization techniques to alleviate the limitation of small display and user profiles to retrieve the most proper documents for each individual user for personalized search. Futhermore we use meta-search to lighten some burdens visiting several portal sites. In this paper, we have implemented and demonstrated the proposed mobile information retrieval system on the domain of travel and received good evaluation from users subjectively.

Evaluation of drug interventions for the treatment of sleep disorders in children with autism spectrum disorders: a systematic review

  • Jenabi, Ensiyeh;Ataei, Sara;Bashirian, Saeid
    • Clinical and Experimental Pediatrics
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    • 제62권11호
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    • pp.405-409
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    • 2019
  • A structured review study of drug interventions on sleep disorders in patients with autism spectrum disorders (ASD) has not been published to date. This systematic review aimed to investigate drug interventions for the treatment of sleep disorders in children with ASD. The Web of Science, PubMed, and Scopus databases were searched until March 2019. Study quality was assessed using the Delphi checklist. Due to the heterogeneity of the findings, a meta-analysis was not possible. Drug interventions for the treatment of sleep disorders in patients with ASD included melatonin, atomoxetine, and risperidone. Atomoxetine had no effect on sleep disorders in patients with ASD. A total of 10 studies were reviewed. Melatonin appears to be useful for the treatment of sleep problems in patients with ASD, but further studies are needed to determine the effects of other drugs.

A Study on Metadata Management Based Modified Htree for Smart Device File Management

  • Min, Youn-A
    • International Journal of Internet, Broadcasting and Communication
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    • 제14권4호
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    • pp.148-153
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    • 2022
  • In keeping with the fourth industrial revolution, IoT-based environments are being implemented everywhere, and as a result, there is an increasing number of cases in which various types of sensed data are utilized efficiently. In particular, the number of multimedia application cases using smart devices is increasing, and there is an increasing number of cases in which large amounts of data are used as fast and convenient as small amounts of data. Given the increasing size of files used in smart devices, the study designed a modified Htree based on journaling meta data management in Ext4-based smart devices and analyzed performance through experiments of various methods. Performance evaluation analysis using IOZone and Hdread shows that the data size of 100Mbyte compared to the data input / output of existing htree is 10% or more, and that of the super large capacity file of 500Mbyte or more is 5% or more.

Evaluation of the MTHFR C677T Polymorphism as a Risk Factor for Colorectal Cancer in Asian Populations

  • Rai, Vandana
    • Asian Pacific Journal of Cancer Prevention
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    • 제16권18호
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    • pp.8093-8100
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    • 2016
  • Background: Genetic and environmental factors play important roles in pathogenesis of digestive tract cancers like those in the esophagus, stomach and colorectum. Folate deficiency and methylenetetrahydrofolate reductase (MTHFR) as an important enzyme of folate and methionine metabolism are considered crucial for DNA synthesis and methylation. MTHFR variants may cause genomic hypomethylation, which may lead to the development of cancer, and MTHFR gene polymorphisms (especially C677T and A1298C) are known to influence predispositions for cancer development. Several case control association studies of MTHFR C677T polymorphisms and colorectal cancer (CRC) have been reported in different populations with contrasting results, possibly reflecting inadequate statistical power. Aim: The present meta-analysis was conducted to investigate the association between the C677T polymorphism and the risk of colorectal cancer. Materials and Methods: A literature search of the PubMed, Google Scholar, Springer link and Elsevier databases was carried out for potential relevant articles. Pooled odds ratio (OR) with corresponding 95 % confidence interval (95 % CI) was calculated to assess the association of MTHFR C677T with the susceptibility to CRC. Cochran's Q statistic and the inconsistency index (I2) were used to check study heterogeneity. Egger's test and funnel plots were applied to assess publication bias. All statistical analyses were conducted by with MetaAnalyst and MIX version 1.7. Results: Thirty four case-control studies involving a total of 9,143 cases and 11,357 controls were retrieved according to the inclusion criteria. Overall, no significant association was found between the MTHFR C677T polymorphism and colorectal cancer in Asian populations (for T vs. C: OR=1.03; 95% CI= 0.92-1.5; p= 0.64; for TT vs CC: OR=0.88; 95%CI= 0.74-1.04; p= 0.04; for CT vs. CC: OR = 1.02; 95%CI= 0.93-1.12; p=0.59; for TT+ CT vs. CC: OR=1.07; 95%CI= 0.94-1.22; p=0.87). Conclusions: Evidence from the current meta-analysis indicated that the C677T polymorphism is not associated with CRC risk in Asian populations. Further investigations are needed to offer better insight into any role of this polymorphism in colorectal carcinogenesis.

뇌졸중 편마비 환자의 견관절 통증에 대한 추나요법의 효과: 체계적 문헌고찰 및 메타분석 (The Effect of Chuna Manual Therapy for Shoulder Pain in Hemiplegic Patients after Stroke: A Systematic Review and Meta-Analysis)

  • 오은미;이은정
    • 한방재활의학과학회지
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    • 제30권3호
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    • pp.89-101
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    • 2020
  • Objectives The purpose of this study is to assess the effectiveness of Chuna manual therapy for shoulder pain in hemiplegic patients after stroke. Methods For a systematic review and meta-analysis, we set a key question in accordance with participants, intervention, comparison, outcome, study design (PICO-SD). we searched for clinical studies that conducted chuna manual therapy for shoulder pain in hemiplegic patients after stroke 7 databases until September 2019. Only randomized controlled trials were chosen. Results Total 14 randomized controlled trials were chosen for systematic review and meta-analysis. 9 studies used efficacy rate as evaluation tool, and 8 used visual analogue scale. Pressure method (壓力型) was used in 11 studies, followed by osteopathy method (整骨型) and wave motion method (波動型) in 9 studies. Chuna manual therapy showed statistically significant pain reduction effect. Through meta analysis, Chuna manual therapy showed significant pain reducing effect except the study with Chuna manual therapy and electroacupuncture compared to electroacupuncture only. Conclusion As a result, Chuna manual therapy showed statistically significant effect in pain reduction. However, almost studies were evaluated in a state of having probable high risk of bias. This suggests that it requires attention to make an interpretation in this study. Furthermore, more clinical research need to be accomplished in the future.

Invisible Web 탐색도구의 성능 비교 및 분석 (The Effectiveness of the Invisible Web Search Tools)

  • 노정순
    • 정보관리학회지
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    • 제21권3호
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    • pp.203-225
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    • 2004
  • 본 연구는 표준 웹 탐색엔진에 색인되지 않는 Invisible Web에 대한 특성과 Invisible Web 탐색도구들을 파악하고, 이들 도구에서 Invisible Web 탐색의 성능을 비교 평가하기 위해 수행되었다. 표준 웹 탐색엔진이 Google과 Invisible Web 탐색엔진인 Incy Wincy, Invisible Web 메타탐색엔진인 Profusion과 Search. com 에서 11개의 탐색질문이 탐색되었다. Profusion과 Search. com, Incy Wincy에서의 Invisible Web(메타) 탐색 기능은 이 세 엔진에서 제공하는 웹 메타탐색기능과도 비교되었다. 탐색결과 Google이 Invisible Web 탐색에서 Invisible Web 탐색엔진보다 .15 -.35 높은 적합성순위정확률을 보였지만 통계적으로 유의한 차이는 아니었다. (${\alpha}$=.055). Invisible Web 탐색엔진에서 웹 메타탐색은 Invisible Web(메타)탐색보다 통계적으로 유의한 수준에서 더 우수한 것으로 나타났다. 성능평가에 사용된 적합성순위정확률은 검색된 문헌의 질 (적합성)과 적합문헌의 순위를 반영하는 정확률 척도로 사용될 수 있음을 보여주었다.

Global prevalence of classic phenylketonuria based on Neonatal Screening Program Data: systematic review and meta-analysis

  • Shoraka, Hamid Reza;Haghdoost, Ali Akbar;Baneshi, Mohammad Reza;Bagherinezhad, Zohre;Zolala, Farzaneh
    • Clinical and Experimental Pediatrics
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    • 제63권2호
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    • pp.34-43
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    • 2020
  • Phenylketonuria is a disease caused by congenital defects in phenylalanine metabolism that leads to irreversible nerve cell damage. However, its detection in the early days of life can reduce its severity. Thus, many countries have started disease screening programs for neonates. The present study aimed to determine the worldwide prevalence of classic phenylketonuria using the data of neonatal screening studies.The PubMed, Web of Sciences, Sciences Direct, ProQuest, and Scopus databases were searched for related articles. Article quality was evaluated using the Joanna Briggs Institute Critical Appraisal Evaluation Checklist. A random effect was used to calculate the pooled prevalence, and a phenylketonuria prevalence per 100,000 neonates was reported. A total of 53 studies with 119,152,905 participants conducted in 1964-2017 were included in this systematic review. The highest prevalence (38.13) was reported in Turkey, while the lowest (0.3) in Thailand. A total of 46 studies were entered into the meta-analysis for pooled prevalence estimation. The overall worldwide prevalence of the disease is 6.002 per 100,000 neonates (95% confidence interval, 5.07-6.93). The meta-regression test showed high heterogeneity in the worldwide disease prevalence (I2=99%). Heterogeneity in the worldwide prevalence of phenylketonuria is high, possibly due to differences in factors affecting the disease, such as consanguineous marriages and genetic reserves in different countries, study performance, diagnostic tests, cutoff points, and sample size.

청소년 대상 과학분야 메타검색시스템과 교과별 디렉토리시스템 연구 (A Study on the Meta Search System and the Curriculum-oriented Directory System for Youth in Science)

  • 곽승진
    • 한국문헌정보학회지
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    • 제38권2호
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    • pp.189-212
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    • 2004
  • 본 연구는 청소년을 대상으로 한 과학분야 메타검색시스템 및 교과별 디렉토리시스템을 구축하고 사용성을 비교$\cdot$평가하여 효율성을 입증하려 하였다. 이를 위해 청소년 대상 과학분야 메타검색시스템과 개별검색시스템 및 교과별 디렉토리시스템을 각각 개발하였으며, 주제별 디렉토리시스템은 개발하지 않고 국내의 대표적인 과학기관에서 운영하고 있는 시스템을 선정하여 비교하였다. 사용성 분석을 위하여 정량적 연구방법과 정성적 연구방법을 병행하였으며, 데이터 수집을 위한 조사도구로 설문조사와 면접조사, 관찰법, 생각을 소리내어 말하기 방법을 사용하였다. 본 연구에서 비교$\cdot$평가한 청소년 대상의 과학분야 정보시스템에 있어서는 메타정색시스템의 사용성이 개별검색시스템보다 높은 것으로 나타났으며, 수업과 연계된 일관된 접근점을 제공하는 교과별 디렉토리시스템이 주제별 디렉토리시스템보다 사용성이 더 높은 것으로 나타났다.

LEEFI형 착화장치의 설계 신뢰도 추정 (Design Reliability Estimation of Low Energy Exploding Foil Initiator)

  • 이민우;백승준;손영갑;장승교
    • 한국추진공학회지
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    • 제22권5호
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    • pp.40-48
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    • 2018
  • 본 논문은 시뮬레이션 기반으로 메타 모델을 이용하여 LEEFI형 착화장치의 설계 신뢰도를 추정하는 방법과 설계 신뢰도를 추정한 결과를 나타내었다. LEEFI형 착화장치에서 비행편 속도는 화약 기폭에 중대한 영향을 미친다. 복잡한 물리적 현상으로 비행편의 속도가 발생하기 때문에 문헌에 공개된 역학적 모델을 이용하여 비행편 속도를 평가하는 데 많은 연산 시간이 필요하다. 또한 높은 신뢰도를 가지는 착화기는 요구되는 신뢰수준이 증가할수록 신뢰도 평가에 연산 비용이 증가한다. 따라서 설계 신뢰도 추정시 연산 효율성을 증가시키기 위하여 시간에 따른 비행편 속도에 대한 메타모델을 구축하였다. 구축한 메타모델을 이용하여 설계 변수의 다양한 분포 및 시그마 수준에 따른 설계 신뢰도를 추정한 결과를 나타내었다. 그리고 제안하는 추정 방법에 대한 연산 효율성과 정확성을 분석하였다.