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arXiv 1603.04447cs.SIcs.CYphysics.soc-ph
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论社会化媒体中信息网络的效率

On the Efficiency of the Information Networks in Social Media

Mahmoudreza Babaei, Przemyslaw A. Grabowicz, Isabel Valera, Krishna P. Gummadi, Manuel Gomez-Rodriguez

摘要:

社交媒体网站是信息市场,用户在这里生产和消费各种各样的信息和想法。在这些网站中,用户通常选择他们的信息源,这反过来又决定了他们接收到什么具体信息,他们接收到多少信息,以及这些信息显示给他们的速度有多快。在这种情况下,一个自然出现的问题是如何有效的社交媒体用户在选择他们的信息源。在这项工作中,我们提出了一个计算框架来量化用户的效率在选择信息源。我们的框架是基于这样的假设,即用户的目标是获得一组独特的信息。为了量化用户的效率,我们问用户是否可以更有效地从另一组源获取相同的信息。我们定义了三个不同的概念的效率-链接,在流,和延迟-对应的用户遵循的源的数量,(冗余)的信息量,她获得和延迟,她收到的信息。我们对效率的定义是通用的,适用于任何具有底层信息网络的社交媒体系统,其中每个用户都跟随其他用户以接收他们产生的信息。在我们的实验中,我们测量Twitter用户获取不同类型信息的效率。我们发现,Twitter用户表现出次优的效率在三个概念的效率,虽然他们往往是更有效地获取非流行的信息比流行的。然后,我们表明,这种效率的缺乏是三重封闭机制的结果,用户通常发现并跟随其他用户在社交媒体。最后,我们开发了一种启发式算法,使用户能够更有效地获取相同的独特的信息。

英文摘要:

Social media sites are information marketplaces, where users produce and consume a wide variety of information and ideas. In these sites, users typically choose their information sources, which in turn determine what specific information they receive, how much information they receive and how quickly this information is shown to them. In this context, a natural question that arises is how efficient are social media users at selecting their information sources. In this work, we propose a computational framework to quantify users' efficiency at selecting information sources. Our framework is based on the assumption that the goal of users is to acquire a set of unique pieces of information. To quantify user's efficiency, we ask if the user could have acquired the same pieces of information from another set of sources more efficiently. We define three different notions of efficiency -- link, in-flow, and delay -- corresponding to the number of sources the user follows, the amount of (redundant) information she acquires and the delay with which she receives the information. Our definitions of efficiency are general and applicable to any social media system with an underlying information network, in which every user follows others to receive the information they produce. In our experiments, we measure the efficiency of Twitter users at acquiring different types of information. We find that Twitter users exhibit sub-optimal efficiency across the three notions of efficiency, although they tend to be more efficient at acquiring non-popular than popular pieces of information. We then show that this lack of efficiency is a consequence of the triadic closure mechanism by which users typically discover and follow other users in social media. Finally, we develop a heuristic algorithm that enables users to be significantly more efficient at acquiring the same unique pieces of information.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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