Current developments in Open Source Software

Open Source Software (OSS) has hit the mainstream in recent years and its scope is set to increase. Best seen as a range of associated licensing techniques, there are many different types of OSS licences. Coupled with a lack of settled case law and rapidly developing market practice, legal interpretation of the OSS world presents challenges to lawyers. Of the ‘top 20’ OSS licences, the GPL is the most commonly used and among the most radical in legal effect. The GPL's legal radicalism centres on its Article 2(b) concept of ‘copyleft’. Copyleft is an inheritance requirement to pass on the GPL's terms to other software that ‘contains’ or is ‘derived from’ the initially used GPL software. I illustrations of Article 2(b) issues from the Linux and Java worlds are provided. Current case law (such as it is) is then overviewed. Finally, contractual and policy implications of OSS governance are then reviewed as the increasing uptake of OSS in the organisation is mirrored in the growing importance of OSS governance.     

分页式虚拟内存管理及Linux实现

本文分析了操作系统的页式虚拟存储管理机制，并结合当前支持多平台的Linux操作系统，根据其中虚拟存储的特点，详细分析了在Linux系统下的页式内存虚拟实现，重点指出了Linux所独特的具体实现过程，其中包括请页机制，物理内存分配与回收和交换机制等。     

浅析网络报警前端对报警管理的设计与实现

本文对视频监控系统中网络报警前端报警管理和维护的设计方案及实现技术展开了研究和探讨，并在网络编码设备上进行了实现。经大规模功能和性能测试，本文介绍的方案可靠性较高，设计灵活，具有一定的应用价值。     

Linux环境下利用i节点收集电子证据的方法

1引言所谓电子证据,是指以数字的形式保存在计算机存储器或外部存储介质中、能够证明案件真实情况的数据或信息。作为一种新的诉讼证据,电子证据的收集与获取过程必须保证合法、确实、充分,只有这样才能准确的认定案件事实,才能正确的使用法律追究犯罪嫌疑人的法律责任。所以,电子证据的收集与获取工作是计算机案件侦破过程中一个十分重要的环节。电子证据收集通常包括寻找文件系统中的所有相关数据,利用磁盘分析技术进行数据恢复,检查磁盘文件被增、删、改的痕迹等工作。在Windows系列操作系统中能够用于电子证据收集的系统工具与应用软件…