Analysis and Visualization Features in PEVNET

Amer Rasheed, U. Wiil, Muhammad Mustansar Ali Khan, Muhammad Mustansar Ali Khan
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Abstract

The information visualization of networks has been a tricky task during the last decade. Visualization of features by way of merging, linking, and grouping of entity attributes is provided to criminal network investigators. It is difficult to understand such large amounts of statistical data. A number of solutions have been proposed to tackle this bulk of information. We have found that the prevailing challenges to information visualization can be eliminated to a large extent by detecting evolving network patterns which are extracted by way of visual analysis of criminal activity based on temporal data, by examining some dynamics of criminal networks, and by making use of some novel interactive features. The current study will help to understand interesting patterns in criminal data by way of visualization. Besides our previously proposed network visualization features, we have appended five new features. These features include ‘Pie-chart feature’ which has been proposed for better ‘details on demand’ facility to the analysts. A ‘Trend analysis feature’ is proposed for visualizing the variation in different crimes over some span of time. The ‘Graphical Trend Analysis feature’ provides a graphical interface to the analysts. There is a unique ‘Encircle feature’, with the aid of which the desired clusters can be dragged away from the dense network for easy manipulation. With ‘Similar node feature’, the analysts may get summarized information regarding the activity of different nodes which are at distant apart. We have made an evaluation of our proposed visualization features by conducting an experiment. Thirty-two participants evaluated the system. The experiment was performed in two phases. In the first phase, a usability evaluation and qualitative feedback was carried out to check whether the features provided adequate results to the users. In the second phase, the comparison of the features had been performed against some other state-of-the-art tool. These tasks were to be performed in the groups of participants. The public data set of Chicago Narcotics was used. We found that the participants, of the PEVNET group, performed the tasks faster as compared to the other techniques used in the experiment. We have demonstrated the usability of the new features with examples by employing the datasets. We have proposed a unique way of visualizing the clustering of data, with which the analyst gets a sound visualization of the data. The usability, of the proposed features, indicates that the crime analysts will get a valuable insight into the criminal networks.
PEVNET中的分析和可视化特性
在过去的十年中,网络的信息可视化一直是一个棘手的任务。通过实体属性的合并、链接和分组,为犯罪网络调查人员提供了特征的可视化。要理解如此大量的统计数据是困难的。已经提出了许多解决方案来处理这大量的信息。我们发现,通过对基于时间数据的犯罪活动进行可视化分析,通过检查犯罪网络的一些动态,以及利用一些新的交互特征,检测不断发展的网络模式,可以在很大程度上消除当前对信息可视化的挑战。目前的研究将有助于通过可视化的方式理解犯罪数据中有趣的模式。除了我们之前提出的网络可视化功能之外,我们还增加了五个新功能。这些功能包括“饼图功能”,该功能已被提议为分析师提供更好的“按需细节”设施。提出了一种“趋势分析特征”,用于可视化不同犯罪在一段时间内的变化。“图形趋势分析功能”为分析师提供了图形界面。有一个独特的“环绕特征”,借助它,所需的集群可以从密集的网络中拖出,以便于操作。利用“相似节点特征”,分析人员可以得到相隔较远的不同节点的活动信息。我们通过实验对我们提出的可视化特征进行了评估。32名参与者评估了该系统。实验分两个阶段进行。在第一阶段,进行可用性评估和定性反馈,以检查功能是否为用户提供了足够的结果。在第二阶段,将这些特性与其他一些最先进的工具进行比较。这些任务将在参与者的小组中进行。使用了芝加哥麻醉品局的公共数据集。我们发现,与实验中使用的其他技术相比,PEVNET组的参与者完成任务的速度更快。我们通过使用数据集的示例演示了新特性的可用性。我们提出了一种独特的数据聚类可视化方法,分析人员可以通过这种方法获得良好的数据可视化。所提出的特征的可用性表明,犯罪分析人员将获得对犯罪网络的有价值的见解。
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