Online Social Media (OSM) is extensively used by contemporary Internet users to communicate, socialize and disseminate information. This has led to the creation of a distinct online social identity which in turn has created the need of online social reputation management techniques. A significant percentage of OSM users utilize various methods to drive and manage their reputation on OSM. This h...

In the digital age, the identities and structures of virtual communities develop outside the traditional definitions of geography and physical constraints. Among the best models to study the identification process in virtual communities are the communities of fans of imaginary universes. Steampunk—neo-Victorian fiction with a science fiction twist—has for instance given rise to a large communit...

Applications are getting increasingly interconnected. Although the interconnectedness provide new ways to gather information about the user, not all user information is ready to be directly implemented in order to provide a personalized experience to the user. Therefore, a general model is needed to which users’ behavior, preferences, and needs can be connected to. In this paper we present our ...

Millions of apps available to smartphone owners request various permissions to resources on the devices including sensitive data such as location and contact information. Disabling permissions for sensitive resources could improve privacy but can also impact the usability of apps in ways users may not be able to predict. We study an efficient approach that ascertains the impact of disabling per...

Online image sharing in social media sites such as Facebook, Flickr, and Instagram can lead to unwanted disclosure and privacy violations, when privacy settings are used inappropriately. With the exponential increase in the number of images that are shared online every day, the development of effective and efficient prediction methods for image privacy settings are highly needed. The performanc...

17 Would You Accept a Facebook Friend Request from Your Boss? Examining Generational Differences; Katherine A. Karl, University of Tennessee at Chattanooga, Chattanooga, TN, USA Richard S. Allen, University of Tennessee at Chattanooga, Chattanooga, TN, USA Charles S. White, University of Tennessee at Chattanooga, Chattanooga, TN, USA Joy Van Eck Peluchette, Lindenwood University, School of Busi...

The call for this special issue on the Semantics of Microposts resulted from discussions initiated by the first Making Sense of Microposts workshop. The workshop was born out of the recognition of the invaluable knowledge contained in the vast, heterogeneous, distributed, continuously updating data store comprised of microposts – very small chunks of typically instantaneously published data, po...

As more people around the world gain access to the Internet, the user base of online social networks such as Facebook, Twitter, Google Plus, LinkedIn, and Instagram will continue to grow. Due to the prevalence and ubiquity of social media, more personal content is being migrated online and more people are using online data as a way to assess others both personally and professionally. Therefore,...

This paper studies the role of selfie and social interactivity in the effect of product endorsers in social media. Given taking selfie is a self-presentation photograph about people’s private information, we interpret selfie as a high form of self-disclosure. We think this form of self-disclosure can moderate the effect of product endorsers’ attractiveness and credibility on consumers’ attitude...

Online social networks like Instagram are places for communication. Also, these media produce rich metadata which are useful for further analysis in many fields including health and cognitive science. Many researchers are using these metadata like hashtags, images, etc. to detect patterns of user activities. However, there are several serious ambiguities like how much reliable are these informa...