• 제목/요약/키워드: knowledge database

검색결과 987건 처리시간 0.025초

최적 규칙 발견 시스템의 구현: 개념 계층과 정보 이득 및 라프셋에 의한 통합 접근 (An Implementation of Optimal Rules Discovery System: An Integrated Approach Based on Concept Hierarchies, Information Gain, and Rough Sets)

  • 김진상
    • 한국지능시스템학회논문지
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    • 제10권3호
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    • pp.232-241
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    • 2000
  • 본 연구는 대량의 데이터에서 효율적으로 최적 규칙을 발견하기 위해 개념 계층과 정보 이득 및 라프셋 이론에 딕반한 통합 방법을 제시하고,이를 최적 규칙 발견 시스템으로 구현한다. 본 방법은 데이터베이스에 있는 데이터에서 일반화된 지식을 추출하기 위한 속성중심의 개념 상승 기법과 불필요한 속성 및 속성값을 제거하기 위한 지식 감축 기법을 적용하며, 최적 규칙의 도출을 위해 속성의 중요도를 사용한다. 본 시스템은 먼저, 속성값 개념의 일반화에 의해 종복 튜플을 제거함으로써 데이터 베이스의 크기를 줄이고, 결정속성에 뎡향을 주지않는 조건속성을 제거하여 간략화된 최적 규칙을 유도한다.그리고 실제 데이터에 적용하여 결정 규칙을 유도하고 그 규칙을 새로운 데이터에 테스트햐 봄으로써 새로운 데이터에도 잘 적용됨을 보인다.

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A Preliminary Study on the Multiple Mapping Structure of Classification Systems for Heterogeneous Databases

  • Lee, Seok-Hyoung;Kim, Hwan-Min;Choe, Ho-Seop
    • International Journal of Knowledge Content Development & Technology
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    • 제2권1호
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    • pp.51-65
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    • 2012
  • While science and technology information service portals and heterogeneous databases produced in Korea and other countries are integrated, methods of connecting the unique classification systems applied to each database have been studied. Results of technologists' research, such as, journal articles, patent specifications, and research reports, are organically related to each other. In this case, if the most basic and meaningful classification systems are not connected, it is difficult to achieve interoperability of the information and thus not easy to implement meaningful science technology information services through information convergence. This study aims to address the aforementioned issue by analyzing mapping systems between classification systems in order to design a structure to connect a variety of classification systems used in the academic information database of the Korea Institute of Science and Technology Information, which provides science and technology information portal service. This study also aims to design a mapping system for the classification systems to be applied to actual science and technology information services and information management systems.

A Study on the Improvement of Korean Journal Citation Index Service

  • Kim, Suntae
    • International Journal of Knowledge Content Development & Technology
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    • 제11권3호
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    • pp.63-79
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    • 2021
  • The KJC and KCI services operated by the National Research Foundation of Korea (NRF) need to refer to the global citation index database to set the service direction that researchers want and develop new functions. Therefore, in this study, the usability of Korea's KJC and KCI web databases was evaluated. In addition, FGI verification was performed for a group of experts on KJC and KCI improvement measures derived by academic information experts. The evaluation committee consisted of the researcher group, the society related group, the publisher (academic information distribution organization) group, and the policy-making organization group. A total of 16 experts performed usability evaluation and service improvement proposals for KJC and KCI services. As a result of usability evaluation of KJC and KCI web database using SUS measurement tool, KJC service was evaluated as 73.44, and KCI service was evaluated as good as 64.38. KJC improvement proposals were evaluated positively with 4 points or more for all improvement items, and KCI improvement proposals were positively evaluated with 3.5 points or more for all improvement items. Overall, KJC and KCI error improvements were evaluated with a score of 4 or more, showing strong affirmations. In the future, it is hoped that the improvement proposals and improvements proposed in this study will be applied to the development of KJC and KCI services, so that more quality services will be used by domestic researchers.

A Review of Randomized Controlled Trials of Pes Anserinus Tendinitis/Bursitis Syndrome in the China National Knowledge Infrastructure Database

  • Choi, Hyo Jung;Back, Hye Kyung;Kim, Young-Jun;Oh, Da Yoon;Park, Cheol Woo;Namgoong, Jin
    • Journal of Acupuncture Research
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    • 제38권4호
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    • pp.284-292
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    • 2021
  • The purpose of this study was to review randomized controlled trials (RCTs) of pes anserinus tendinitis or bursitis (PATB) syndrome in the China National Knowledge Infrastructure database to investigate the efficacy of traditional Chinese medicine treatment for PATB syndrome. There were 20 RCTs published from 2001 to 2021 which were selected for analysis by publication year, number of samples, evaluation criteria, treatment duration, and treatment method. Out of the 142 retrieved RCTs, 20 were relevant to this review, and had performed Chinese medicine treatments including acupuncture (the most common treatment typically using acupoints SP10, ST35, SP9, and LR8), manipulation (typically using acupoints ST35, SP10, and SP9), and external application therapy (typically herbal medicine) in the treatment of PATB syndrome. Chinese medicine treatments were used widely in the treatment of PATB syndrome. We hope in the future, this review may initiate the development of treatments for PATB syndrome using Korean medicine.

Acupuncture for Adult Obstructive Sleep Apnea or Obstructive Sleep Apnea-Hypopnea Syndrome: A Review of the China National Knowledge Infrastructure Database

  • Hye Kyung, Baek;Young Jun, Kim;Yeon Sun, Lee;Hye Ri, Jo;Mi So, Park;Dong Guk, Shin;Hyun A, Shim
    • Journal of Acupuncture Research
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    • 제39권4호
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    • pp.275-282
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    • 2022
  • The purpose of this study was to analyze acupuncture treatment methods and acupoints used to treat obstructive sleep apnea (OSA) or obstructive sleep apnea-hypoapnea syndrome (OSAHS). The data were retrieved from January 2010 to May 2022 from the China National Knowledge Infrastructure database. The search terms included "adult," "obstructive sleep apnea," "obstructive sleep apnea hypoapnea syndrome," "acupuncture," and "electro-acupuncture." Clinical trials for acupuncture treatment of OSA or OSAHS were included in this review (4 non-randomized controlled studies, 1 was a case report, and 10 randomized controlled studies). For OSA and OSAHS treatment, the acupoints that were most frequently used included REN23, LU7, ST40, EX9, LI11, and DU20. Compared with the control or Western treatment group, the treatment outcome measures of participants in the acupuncture treatment group significantly improved. In some studies, participants in the acupuncture group did not have side effects and the treatment was cost-effective. The data analyzed in this review suggest that acupuncture is an effective treatment for OSA or OSAHS.

재난과 관련된 지명에 투영된 방재인식에 관한 연구 (A Study of Disaster Recognition Based on Disaster-related Place Names)

  • 박경;김선희
    • 한국지형학회지
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    • 제17권2호
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    • pp.15-28
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    • 2010
  • 재해 유형별로 관련된 재해 지명어를 도출하여 지도 및 문헌, 지명정보서비스 등 전체 6종의 자료에 나타난 재해 관련 지명을 확인하고 수집하여 데이터베이스를 구축하였다. 이를 토대로 지명을 통해 나타나는 재해 유형별 지명의 지역별 분포 특성을 분석하여 현재 급증하고 있는 재난에 대비한 방재대책 수립 및 방재영향평가에 활용될 수 있는 가능성을 탐색하고자 하였다. 자연재해와 방재 관련 지명을 대상으로 총 128개의 재해 유형별 재해 지명어를 먼저 추출하였고, 이후 이 검색어를 중심으로 해동지도, 1872군현도, 오만분지일지형도, 지명총람, 신구대조 조선전도부군면리동명칭일람, 지명정보서비스 등 총 6종의 자료를 대상으로 재해 지명을 검색하여 DB화하였으며, 각 자료별로 지역별·재해 유형별 특성을 분석하였고, 활용방안을 제시하였다.

분류전문가시스팀에 관한 연구 (A study on the expert system for classification of books)

  • 김정현
    • 한국도서관정보학회지
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    • 제19권
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    • pp.35-57
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    • 1992
  • This study is an attempt to provide some helpful data for the design and the implementation of the expert system for the book-classification based on the analysis of various cases of the classification-expert system models. Following the introduction, the concepts and some features of an expert system were overviewed in the second chapter, on the basis of which the following concrete cases were introduced and analyzed in the third chapter : (1) ACN System for NC, (2) Expert System for NDC, (3) Expert System for UDC, (4) Herba Medica System, (5) Expert System for IPC, (6) Stratcyclode Project, (7) Expert System for Classification of INIS Database, (8) AutoBC System, and etc. In the conclusion, for the development of the classification-expert system, it was turned out that constructing a new system by using an AI language such as Prolog or LISP is more desirable than employing any one of expert system shells. Together it is necessary for the following requirements to be met : (1) The subject concept of a document elicited should be accurate. (2) Not only a domain knowledge but also the knowledge covering all the subjects should be represented in the knowledge-bases. (3) The knowledge-bases should be organized in such a way that the characteristics of the knowledge about classification should be well defined. (4) rule-base consisting of accurate rules about classification should be made. (5) It should be possible for classification code wanted to be generated immediately.

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생산기반기술 디지털화를 위한 지식공유형 플랫폼 개발: 전자패키지 표면실장기술을 중심으로 (Development of Knowledge Sharing Platform for Digitization of Surface Mount Technology)

  • 배성민;손수현;권상현;이효수;허영무;강문진;유세훈
    • 마이크로전자및패키징학회지
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    • 제18권1호
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    • pp.1-5
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    • 2011
  • In this paper, we introduce knowledge sharing platform for production technology. Surface mount technology (SMT) is one of the important production technologies to fabricate electronic devices. The production technology of the SMT, however, has been propagated from an experienced worker to an inexperienced worker in a manufacturing field. The objective of the knowledge sharing platform is to convert the production experiences like a solder printing knowhow into quantitative values, to construct the database of the process technologies, and to share the technologies systematically via web portal service. In addition, the knowledge sharing platform contains the total production process of mobile products, the information of experts and facilities, and recent R&D output. In this manner, the knowledge sharing platform for production technology could strengthen the technological competitiveness of small and medium manufacturing companies in Korea.

프리셉터 역할을 경험한 간호사의 근거기반실무에 대한 신념, 지식 및 수행 수준 (Level of Beliefs, Knowledge and Performance for Evidence-Based Practice among Nurses Experienced in Preceptor Role)

  • 유재용;오의금
    • 간호행정학회지
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    • 제18권2호
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    • pp.202-212
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    • 2012
  • Purpose: As Evidence-Based Practice (EBP) has increasingly been proven as a means of cost-effective and higher-quality healthcare, its successful implementing are challenging. This study done to identify EBP beliefs, knowledge and performance among nurses experienced as a preceptor. Method: A descriptive cross-sectional survey was conducted with a convenience sample of 249 preceptor nurses working in 9 general hospitals in Korea. Reliable and valid questionnaires (EBP beliefs scale, Evidence Based Practice Questionnaire, Research-related activities) were used and the data were analyzed using SPSS win 17.0. Result: Perceived beliefs on EBP were relatively positive (mean score 3.57 out of 5), and the level of knowledge was moderate (4.21 out of 7). However, performance of EBP was low (3.82 out of 7). Regularity in reading research journals and searching evidences using core web-database were rarely conducted. Statistically significant correlations were found between beliefs, knowledge and performance of EBP (all p<.05). Conclusions: This result indicates that education and training programs to facilitate EBP performance are needed among preceptor nurses.

속성 그래프 및 GraphQL을 활용한 지식기반 공간 쿼리 시스템 설계 (Design of Knowledge-based Spatial Querying System Using Labeled Property Graph and GraphQL)

  • 장한메;김동현;유기윤
    • 한국측량학회지
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    • 제40권5호
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    • pp.429-437
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    • 2022
  • 최근 사람과 기계의 소통을 위해 QA (Question Answering) 시스템에 대한 요구가 증가하였다. QA 시스템 중 공간에 관련된 질문을 처리할 수 있는 폐쇄 도메인 QA 시스템을 GeoQA라 하는데 본 연구는 GeoQA 분야에서 주로 사용되던 RDF (Resource Description Framework)기반의 데이터베이스가 데이터 입출력 및 변형에 한계를 보인다는 점을 극복하기 위해 최근 주목받고 있는 새로운 형태의 그래프 데이터베이스인 LPG (Labeled Property Graph)를 사용하였다. 또한, LPG 쿼리(query)언어가 표준화되지 않아 GeoQA 시스템이 특정 제품에 의존할 수 있다는 점 때문에 API 형태의 쿼리 언어인 GraphQL (Graph Query Language)을 도입하여 다양한 LPG를 사용할 방안을 제시하였다. 본 연구에서는 공간 관련 질문이 입력되었을 때 답변을 검색할 수 있도록 대한민국 중심의 별도 데이터베이스를 구축하였는데 각 데이터는 국가공간정보포털 및 지방행정 인허가데이터개방 서비스에서 취득하였으며 각 공간 객체 간 공간적 관계는 미리 계산되어 그래프의 엣지(edge) 형태로 입력되었다. 사용자의 질문은 먼저 FOL (First Order Logic)형태를 거쳐 최종적으로 GraphQL로 변환되며 GraphQL 서버를 통해 데이터베이스에 전달되었다. 실험에 사용한 LPG로는 현재 가장 높은 점유율을 보이는 그래프 데이터베이스인 Neo4j를 선택하였고 내장 함수와 QGIS 일부가 공간 연산에 사용되었다. 시스템 구축 결과 사용자의 질문을 변환, Apollo GraphQL 서버를 통해 처리하고 데이터베이스로부터 적합한 답변을 얻을 수 있음을 확인하였다.