Directed links in social media could represent anything from intimate friendships to common interests, or even a passion for breaking news or celebrity gossip. Such directed links determine the flow of information and hence indicate a user’s influence on others—a concept that is crucial in sociology and viral marketing. In this paper, using a large amount of data collected from Twitter, we pres...

We give counterexamples to a conjecture of Benny Chor and another of the second author, both from the late 80s, by exhibiting functions for which the influences of large coalitions are unexpectedly small relative to the expectations of the functions.

In recent years, online social networks have become one of the most influential mediums of sharing information. However, alongside this promising feature comes the threat of rumors and misinformation propagation, which has aroused extensive attention from our society. In this paper, we try to figure out how to select the smallest set of highly influential nodes decontaminated with good informat...

BACKGROUND AND AIM The picture archiving and communication system (PACS) is a healthcare system technology which manages medical images and integrates equipment through a network. There are some theories about the use and acceptance of technology by people to describe the behavior and attitudes of end users towards information technologies. We investigated the influential factors on users' acce...

A number of predictors have been suggested to detect the most influential spreaders of information in online social media across various domains such as Twitter or Facebook. In particular, degree, PageRank, k-core and other centralities have been adopted to rank the spreading capability of users in information dissemination media. So far, validation of the proposed predictors has been done by s...

Social network services (SNSs) have become new global and multilingual information platforms due to their popularity. In SNSs with content-sharing functionality, such as“retweet” in Twitter and “share” in Facebook, posts are easily and quickly shared among users, and some of which can spread over different regions and languages. In this work, we first define the concept of cross-lingual informa...

Content providers, such as enterprises and organizations who publish their content on the Internet, aim at making their content visible and easily accessible to the users. The vast amount of data contained in databases impedes their efforts, as users often find it challenging to navigate through the available data and find the items that best suit their needs. It is therefore necessary for cont...

Œe three ways of interactions in TwiŠer–retweet, reply, and mention–comprise of a latent dynamic information ƒow network between users, which can be utilized to determine inƒuential users. Œis paper focuses on determining which TwiŠer users have great inƒuence on a query location Q in the sense that they are assumed to provide information that is of sucient interest to prompt people atQ to int...