【作者】 王宁；

【导师】 于泠；

【作者基本信息】 南京师范大学 ， 计算机软件与理论， 2013， 硕士

【摘要】 随着教育终身化和学习型社会的提出,泛在学习(U-Learning)得到了越来越多的关注,并且成为未来学习型社会的必然发展方向和人们终身学习的应然追求。加之普适计算、泛在网络等泛在计算技术的兴起与发展改变了人们获取知识的方式,为泛在学习的实现提供了技术支撑。因此,针对泛在学习宏观理念和微观技术的研究成为世界各国包括教育、计算机、信息技术等领域学者的研究重点。在了解数字化学习(E-Learning)、移动学习(M-Learning)以及泛在学习三种学习方式演进路线及发生背景的基础上,本文比较了学习方式演进路线各阶段的特点。通过分析泛在学习与目前广泛应用的E-Learning、M-Learning的联系与区别,给出了泛在学习系统从E-Learning、M-Learning演进的重要步骤。研究了泛在学习的特点,从学习设备、学习资源、学习交互体三个方面设计了泛在学习系统功能结构,各部分通过资源的演进有机地融合在一起,并在此基础上,分析了泛在学习系统安全问题的研究现状,给出了泛在学习系统的安全性设计。本文的研究丰富了泛在学习的理论。本文基于开源内容管理系统实现了一个泛在学习原型系统。在分析已有学习平台开发技术性强、周期长、花费大、维护复杂、技术人员不能很好把握平台主旨等局限性的基础上,选择开源内容管理系统(CMS)进行泛在学习系统的开发。开源CMS具有免费、可供二次开发、功能模块丰富、适用知识管理等特点。通过比较分析目前开源CMS的特点,本文使用Drupal作为开发工具,实现了本文设计的泛在学习系统功能。还选用Windows Phone作为手机客户端的开发工具,开发了移动课件及手机的移动学习客户端。本文的研究为泛在学习系统的开发提供了一种便捷、经济的新方法。本文最后重点研究了泛在学习系统资源服务层的访问控制。在分析现有访问控制技术局限性的基础上,提出了一种基于CP-ABE算法的情境访问控制方案,为保障泛在学习资源的安全性提供了新途径。更多还原

【Abstract】 With the conception of lifelong education and learning society proposed, ubiquitous learning (U-Learning) has gained more and more attentions and becomes a natural development trend of a learning society and the pursuit for lifelong learning. In addition, the rise and development of ubiquitous computing technology such as pervasive computing, ubiquitous network have changed the way people acquire knowledge and provide technical support for ubiquitous learning. Therefore, research on macro idea and micro technology of ubiquitous learning becomes the focus of scholars around the world, including the field of education, computer and information technology and so on.Based on evolution path and background of E-Learning, M-Learning and U-Learning, this thesis compares the characteristics of each stage of the evolution path. By analyzing the relation and difference between ubiquitous learning and E-Learning, M-Learning used widely, this thesis presents the important evolution step from E-Learning, M-Learning to ubiquitous learning system. We study the characteristics of ubiquitous learning and design system structure of ubiquitous learning from learning device, learning resources and learning interactive objects which are integrated by resource evolution. On this basis, we analyze the research status of security in ubiquitous learning system and give security design of ubiquitous learning system. This study enriches the ubiquitous learning theory.This thesis realizes a U-Learning prototype system based on open source content management system. Based on the limitations of existing learning platform, including highly technology, long cycle, expensive and complex maintenance and so on, this thesis chooses open source content management system (CMS) to develop the system. Open Source CMS is free with abundant functional modules and available for secondary development and knowledge management. We choose Drupal to develop U-Learning system designed by analyzing the characteristics of open source CMS. We use Windows Phone as the mobile client development tool and develop mobile courseware and mobile learning client. This thesis provides a convenient and economic method for the development of ubiquitous learning system.Finally, this thesis focuses on access control of resource service layer in ubiquitous learning system. Given the limitation of existing access control technologies, we propose a context-aware access control scheme based on CP-ABE algorithm. This thesis provides a new way for security of ubiquitous learning resources.更多还原