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引用次数: 16
摘要
讲座录音已经成为一种广泛使用的快速生成学习内容的方式。然而,由此产生的文档在学习者交互方面存在一些缺点,特别是在基于这些文档的协作学习方面。本文提出了一个以细粒度方式锚定学习内容的小组讨论模型。以工件为中心的讨论被视为文档的协作注释,具有独立于文档和媒体类型的注释的扩展数据模型。在概述了通用框架和数据模型之后,我们描述了它在围绕讲座录音的小组讨论场景中的应用。注释可以在空间和时间上锚定在多媒体文档中。用于共享笔记的基础设施已作为注释Web服务(Annotation Web Service, AWS)实现,用于查看记录的播放器软件已扩展为客户端,提供基于线程和以文档为中心的讨论功能
Anchored discussions of multimedia lecture recordings
Lecture recording has become a widespread way of producing learning contents rapidly. However, the resulting documents have some disadvantages regarding learner interaction, in particular regarding collaborative learning based on such documents. This paper proposes a model for anchoring group discussions in learning contents in a fine-granular way. Artifact-centered discussion is regarded as collaborative annotation of documents, with an extended data model for annotations which is independent of document and media types. After outlining the generic framework and data model, we describe its application to the scenario of group discussions around lecture recordings. Notes can be anchored both spatially and temporally in the multimedia documents. The infrastructure for sharing notes has been implemented as an Annotation Web Service (AWS), and the player software for viewing recordings has been extended into a client providing thread-based as well as document-centered discussion features