Rise and decline process of online communities
Rise and decline process of online communities
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网络社区的兴衰过程
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
H. Ohashi
中科院分区：
文献类型：
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作者：
K. Asatani;F. Toriumi;H. Ohashi
像Friendster这样的一些在线社区已经衰落，其他一些据说也在衰落。最近的研究揭示了每个社区的衰落和上升的机制。然而，还没有全面的研究揭示每个社区在衰退机制上的差异。我们把在线社区看作是用户和话题的网络，并用海德的平衡理论定义了用户的行为。在我们的模型中，用户处于进退两难的境地，在主题偏好和相邻用户之间的平衡之间徘徊。用户在困境中的行为，他/她的策略，会传播给其他用户。利用该模型对网络社区进行模拟，观察不同类型社区的兴衰。结果，我们发现有两种类型的社区倾向于发展与许多用户：主题动态变化的社区(自由主题类型)和主题逐渐变化的社区(主题类型)。然而，每个社区的属性和用户的行为都是不同的。我们通过模拟发现，在Free Topictype社区中，用户的协作行为非常频繁，用户考虑的是彼此之间的平衡，而不是他们的主题偏好。因此，自由主题类型的社区不会经常崩溃(即迅速失去用户)。此外，我们确认，在自由主题类型的社区中，关于某个主题的帖子要么是负面的，要么是正面的。另一方面，在主题类型社区中，模拟结果表明用户对主题的偏好优先。这导致社区频繁崩溃。然而，这样的社区中的用户被发现比自由主题类型的社区中的用户获得更多的好处。可以说，在崩溃发生后，社区对一些留下来的用户来说仍然是比较有利的。
Some online communities like Friendster had declined, and some of the others are said to be declining. Recent research has revealed the mechanism of decline as well as that of rise in each community. However, no comprehensive research has yet revealed the difference in declining mechanisms of each communities. We considered the online communities as networks of users and topics and defined behavior of users using Heider’s balance theory. Users in our model are in a dilemma, stuck between topic preference and the balance between neighboring users. How the user behaves in the dilemma, his/her strategy, disseminates to other users. We simulate online communities using the model and observe the rise and decline of different kinds of communities. As a result, we found that two types of communities tend to develop with many users: communities in which the topic changes dynamically (FreeTopic-type) and communities in which the topic changes gradually (Topic-type). However, the property of each community and behavior of users are different. We found by simulation that the collaborative behavior of users happens very frequently in the FreeTopictype community, in which users consider the balance between each other rather than their topic preference. As a result, the FreeTopic-type communities do not often crash (i.e. quickly lose users). In addition, we confirmed that the postings about a topic are either negative or positive in the FreeTopic-type community. On the other hand, in the Topic-type community, simulation results indicate that users prioritize their preference for a topic. This causes the community to crash very frequently. However, users in such a community are found to obtain more benefits than in FreeTopic-type communities. It can be said that, after crashes occur, the community is still relatively beneficial for some users who remain.