Speech Watermarking: An Approach for the Forensic Analysis of Digital Telephonic Recordings*

Abstract: In this article, the authors discuss the problem of forensic authentication of digital audio recordings. Although forensic audio has been addressed in several articles, the existing approaches are focused on analog magnetic recordings, which are less prevalent because of the large amount of digital recorders available on the market (optical, solid state, hard disks, etc.). An approach based on digital signal processing that consists of spread spectrum techniques for speech watermarking is presented. This approach presents the advantage that the authentication is based on the signal itself rather than the recording format. Thus, it is valid for usual recording devices in police‐controlled telephone intercepts. In addition, our proposal allows for the introduction of relevant information such as the recording date and time and all the relevant data (this is not always possible with classical systems). Our experimental results reveal that the speech watermarking procedure does not interfere in a significant way with the posterior forensic speaker identification.     

利用足迹自动识别系统对现场足迹进行图像处理

针对现场足迹的特点,在足迹自动识别系统原理的基础上,分析研究影响足迹图象质量的各种因素,并就这些不同原因,给出有效的足迹图象处理方法。结果表明,利用足迹自动识别系统对现场足迹进行处理,可以得到较高质量的足迹图象。同时,相比较其他图象处理方法,该方法简单、方便,具有较好实用性和可操作性,从而提高了现场足迹的利用率。     

中共在陕甘宁边区执政形象探析

中国共产党在陕甘宁边区掌握局部政权期间,以陕甘宁边区为“一切工作的试验区”,把合乎最广大人民群众的最大利益和为最广大人民群众所拥护作为价值坐标,推进民主政治建设,健全法制,建设廉洁政府,倡导深入实际、调查研究,领导人民发展经济、文化教育和医疗卫生事业,开展社会改造运动,塑造和展示出中共在陕甘宁边区执政的民主、廉洁、亲民、为民形象,给我们留下深刻启示。     

浅谈数字图像真实性的检验鉴定

随着IT技术的迅速发展,数字图像的采集越来越方便,但通过数码设备形成的数字周像非常容易被篡改。当前国内外均存在照片伪造现象,因案件性质不同,影响的范围也有所差异,但共同的目的都是为了私欲而混淆是非。这就要求我们必须不断提高检验鉴定的水平,还原事实真相。     

韩国古代诗歌的大唐影响——杜甫与李达诗中的“马”意象

韩国古代＂三唐诗人＂致力于学习中国唐诗,努力将自己的诗风与唐诗接近,在唐代诗人中,杜甫的诗成为他们学习和模仿的典范。李达与杜甫的人生遭际类似,一生处于社会底层,抑郁不得志,他的《柳摠戎紫骝马歌》是赠与知己友人柳珩的诗.表达了一个远离于主流社会的局外人的悲哀。他借鉴了杜甫诗中的＂马＂意象,但又有所不同。杜甫在自己的作品中,通过＂马＂的形象映射自己的理想和抱负,而李达的诗中只是以一个叙事者的身份状物抒情,没有达到杜甫的意象高度,李达虽然模仿了唐诗,但并没有完全悟透其中滋味。本文试图通过一个侧面,揭示韩国古代三唐诗人在接受中国唐代诗歌中的得失。     

Web Content Management Systems: An Analysis of Forensic Investigatory Challenges

With an increase in the creation and maintenance of personal websites, web content management systems are now frequently utilized. Such systems offer a low cost and simple solution for those seeking to develop an online presence, and subsequently, a platform from which reported defamatory content, abuse, and copyright infringement has been witnessed. This article provides an introductory forensic analysis of the three current most popular web content management systems available, WordPress, Drupal, and Joomla! Test platforms have been created, and their site structures have been examined to provide guidance for forensic practitioners facing investigations of this type. Result's document available metadata for establishing site ownership, user interactions, and stored content following analysis of artifacts including Wordpress's wp_users, and wp_comments tables, Drupal's “watchdog” records, and Joomla!'s _users, and _content tables. Finally, investigatory limitations documenting the difficulties of investigating WCMS usage are noted, and analysis recommendations are offered.     

数字政府建设中的政务服务

本文基于新公共管理和新公共服务两大理论的学理分析,剖析了数字政府建设中政务服务效能提升的制约瓶颈并提供了相应的对策建议.分析结果表明:分散的政务服务抑制了服务效能、异向的政务数据影响了业务协同、失衡的供给能力制约了发展水平.研究结论认为,优化政务服务基础平台、完善政务信息共享机制、提高政务服务供给能力是数字政府建设中政...     

Usability and Digital Inclusion: Standards and Guidelines

This article aims at discussing e-government website usability in relation to concerns about digital inclusion. E-government web design should consider all aspects of usability, including those that make it more accessible to all. Traditional concerns of social exclusion are being superseded by fears that lack of digital competence and information literacy may result in dangerous digital exclusion. Usability is considered as a way to address this exclusion and should therefore incorporate inclusion and accessibility guidelines. This article makes an explicit link between usability guidelines and digital inclusion and reports on a survey of local government web presence in Portugal.     

COOPERATIVES FOR THE PERFORMING ARTS: A PROSPECTUS

The author describes research that addresses the problem of organizational change associated with the use of new information and communication technologies. The author focuses on the change processes associated with the use of the World Wide Web by cultural heritage organizations: archives, galleries, libraries, and museums. This research note outlines the research problem and the theoretical perspectives and research methodologies to be used in the research.     

Digital Technology and Cultural Heritage Sites in the City of Tshwane

This article examines the feasibility and sustainability of digital technology to promote cultural heritage sites in the City of Tshwane (CoT), South Africa. Post-Apartheid development imperatives compel the CoT to construct new cultural sites. Over time, the number of visitors to the places declined. The CoT introduced digital technology to collect and repackage information on some of the cultural edifices to add value to them. However, the absence of heritage/digital technology impact analysis and cultural policy in the CoT could compromise the program. The article recommends further introduction of important facilities and services in the sites to increase public interest.