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Study on the automated generation and access control of Web contents with a heterogeneous server cluster

异构服务器集群Web内容自动生成与访问控制研究

基本信息

批准号：
14580461
负责人：
OOMOTO Eitetsu
金额：
$ 2.11万
依托单位：
Kyoto Sangyo University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2005
项目状态：
已结题

项目摘要

In this research, we have studied on the automated generation and access control of web contents under a heterogeneous server cluster environment. The results of our research are summarized as follows.(1)The SMIL is considered to be important as the representation of online hypermedia. We designed and implemented prototype system for cooperative distributed work such that several users on a network can edit the multimedia content (video stream) simultaneously.(2)We focused the reference integrity constraints among XML documents, and designed the basis to maintain these constraints. Also, a prototype system was implemented.(3)A mechanism to represent semantic integrity constraints for XML documents was proposed, and a prototype system was implemented. The notable feature of the implemented prototype system is that the semantic integrity represented by XML tags are stored in the database as deductive expressions which represent the integrity on the given XML documents.(4)Recent portable devices such as a cellphone already have enough functionality to process a variety of information in our daily life. For example, the QR code is a one of the representation for such information.We developed the management system for student attendee in class rooms by cellphones which have a facility to recognize the QR code in Java program. In this system, the attendee information is acquired by a client written in Java, and is transmitted to the server by way of HTTP connection. The lecturer can grasp the overall about the attendees in his/her class with a web browser-based user interface intuitively.(5)The foundation about a c concurrent cooperative work by multiple users for web contents was also studied. We represent the shared data as a tree structure. And, we also define a locking protocol to edit the shared tree structured data concurrently.

在本研究中，我们研究了异质服务器集群环境下Web内容的自动生成和访问控制。我们的研究结果总结如下：(1)SMIL被认为是在线超媒体的重要代表。设计并实现了协同分布式工作原型系统，使得网络上的多个用户可以同时编辑多媒体内容(视频流)。(2)重点研究了XML文档间的引用完整性约束，并设计了维护这些约束的基础。提出了一种表示XML文档语义完整性约束的机制，并实现了一个原型系统。实现的原型系统的显著特点是，由XML标签表示的语义完整性以演绎表达式的形式存储在数据库中，表示给定的XML文档上的完整性。(4)最近的便携式设备，如手机，已经具有足够的功能来处理日常生活中的各种信息。例如，二维码就是这种信息的一种表示形式，我们用Java程序开发了具有二维码识别功能的手机教室学生考勤管理系统。在该系统中，与会者信息由用Java编写的客户端获取，并通过HTTP连接的方式传输到服务器。讲师可以通过基于Web浏览器的用户界面直观地掌握班级学员的整体情况。(5)研究了多用户并发协同工作的基础。我们将共享数据表示为树结构。此外，我们还定义了一个锁定协议来并发编辑共享树形结构的数据。