自然言語処理と可視化を利用した履修選択支援システムの実用化

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  • Practical Realisation of a Course Selection Support System Using Natural Language Processing and Visualisation

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Abstract

社会の新たな課題の解決において,学際的,分野横断的教育の発展は,非常に有効な手段となり得るにもかかわらず,大学等の高等教育において,社会のあらゆる課題に対応できるカリキュラムを提示できる状況にはない.このような問題に対し,本論文では,シラバスを対象とし,カリキュラムの検索,構造化を行うシステム(MIMAサーチ)を提案し,その実用化について述べる.MIMAサーチの特徴は,自然言語処理技術を活用することで,与えられたキーワードに関連する講義の関連性を検索結果に応じて即時的に計算し,この結果を基にカリキュラムの全体像の可視化を行うことにある.MIMAサーチを利用した履修支援により,分野や学科,専攻によらず,社会の課題等に対して,必要な知識をより効率的に習得することにつながることが期待される.MIMAサーチは,東京大学において,2006年よりシラバス構造化,および講義ビデオ(UTokyo Open Course Ware)の構造化システムとして実用化され,10年以上にわたりサービスを続けている.実用化後の実際にシステムを利用したユーザ評価を基に,本システムの有用性についても論述する.

The recent explosion of scientific knowledge due to the rapid advancements in academia and research has made it difficult for students and educators to gain a comprehensive overview of their syllabi. Additionally, the growing number of interdisciplinary fields of research has compounded the difficulty for students to find subjects that they would prefer from their syllabi. In such a situation, structuring of issue-oriented curricula is expected to be an efficient method to aid suitable subject selection for students and educators alike. In this paper, we introduce an issue-oriented automatic curricula structuring system that integrates automatic term recognition as an issue extraction and similarity calculation as terminology-based document clustering. In the system, retrieved syllabi are automatically classified according to the terms or issues that are included in them. Compared to conventional simple keyword-based syllabus retrieval systems, the proposed system's advantage is its capability to provide efficient support in selecting suitable courses from a large number of syllabi by using visual-based GUIs even to novice users (students). The system is already in operation practically in the form of issue-oriented syllabus structuring at the University of Tokyo's Open Course Ware, school or department of engineering syllabi and University of Tokyo's lecture catalogue. Questionnaire-based evaluations analysing the practical usability of the system have also been also incorporated.

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