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Korean Learning Assistant System with Automatically Extracted Knowledge

자동 추출된 지식에 기반한 한국어 학습 지원 시스템

  • 박기태 (금오공과대학교 컴퓨터소프트웨어공학과 학부과정) ;
  • 이태훈 (금오공과대학교 컴퓨터소프트웨어공학과 학부과정) ;
  • 황소현 (금오공과대학교 컴퓨터소프트웨어공학과 학부과정) ;
  • 김병만 (금오공과대학교 컴퓨터소프트웨어공학과) ;
  • 이현아 (금오공과대학교 컴퓨터소프트웨어공학과) ;
  • 신윤식 (금오공과대학교 컴퓨터소프트웨어공학과)
  • Received : 2012.05.09
  • Accepted : 2012.08.09
  • Published : 2012.11.30

Abstract

Computer aided language learning has become popular. But the level of automation of constructing a Korean learning assistant system is not so high because a practical language learning system needs large scale knowledge resources, which is very hard to acquire. In this paper, we propose a Korean learning assistant system that utilizes easily obtainable knowledge resources like a corpus, web documents and a lexicon. Our system has three modules - problem solving, pronunciation marker and writing assistant. Automatic problem generator uses a corpus and a lexicon to make problems with one correct answer and three distracters, then verifies their suitability by utilizing frequency information from web documents. We analyze pronunciation rules for a pronunciation marker and recommend appropriate words and sentences in real-time by using data extracted from a corpus. In experiment, we evaluate 400 automatically generated problems, which show 89.9% problem suitability and 64.9% example suitability.

정보통신기술을 활용한 학습시스템은 꾸준히 강조되어 왔지만 한국어 학습시스템의 자동화 수준은 높지 않다. 실용성 있는 학습시스템의 구축에는 대량의 기반지식이 필요하지만 이러한 지식을 구축하기 쉽지 않기 때문이다. 본 논문에서는 한국어학습시스템의 요소로 어학문제풀이, 표준발음 도우미, 글쓰기 도우미를 제안하고, 획득이 용이한 말뭉치와 웹문서, 사전을 활용하여 구축된 학습지원시스템을 소개한다. 어학문제풀이를 위한 자동문제생성에서는 말뭉치와 사전을 이용하여 문제와 보기문항을 생성하고, 웹문서 검색빈도를 활용하여 보기적합성을 검증한다. 표준발음 변환을 위해서 발음표기법을 분석하였으며, 글쓰기 지원을 위해 말뭉치에서 추출한 기분석데이터를 이용한 실시간 어휘추천과 문장추천을 구현하였다. 실험에서는 제안하는 방법으로 생성된 임의의 400문제에 대한 판정 결과 89.9%의 문제 적합률과 64.9%의 보기 적합률을 보였다.

Keywords

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