ABSTRACT
In the recent years, both Human-Computer Interaction (HCI) and the Social Web (also known as Web 2.0) have had exponential growth.

In [1], Human-Computer Interaction is defined as “a discipline concerned with the design, evaluation, and implementation of interactive computing systems for human use and with the study of major phenomena surrounding them”.
On the other hand, [2] defines the Social Web as “a set of relationships that link together people over the Web ... The Social Web is not just about relationships, but about the applications and innovations that can be built on top of these relationships”.

As the two definitions quoted above suggest, the two disciplines can work well together. In fact, a HCI application could be developed in the Social Web scenario, in order to study and improve relationships among people.
Moreover, Turekten and Olfman highlighted that the ‘any time, any place’ nature of HCI has not been widely explored in the Web 2.0 research area [3]. Recently, approaches to link these two disciplines have been developed [4].

The aim of this special issue is to invite authors to submit original manuscripts that explore (and possibly cover) this gap between HCI and the Social Web.
This Special Issue solicits novel papers on a broad range of topics, including, but not limited to:
- novel HCI applications able to interact with the social web;
- integration of social web features into existing HCI applications;
- social networks analysis of data gathered through HCI applications;
- analysis of how the introduction of social web features has an impact on the performance of HCI applications.

[1] ACM SIGCHI. (1992) Acm sigchi curricula for human-computer inter-action. New York, NY, USA.
[2] D. Appelquist, D. Brickley, M. Carvahlo, R. Iannella, A. Pas-sant, C. Perey, and H. Story. (2010) A Standards-based, Open and Privacy-aware Social Web. W3C Incubator Group Report.
[3] O. Turetken and L. Olfman, “Introduction to the special issue on human-computer interaction in the web 2.0 era,” AIS Transactions on Human-Computer Interaction, vol. 5, no. 1, 2013.
[4] F. Mulas, P. Pilloni, M. Manca, L. Boratto, and S. Carta, "Linking Human-Computer Interaction with the Social Web: A web application to improve motivation in the exercising activity of users," In Cognitive Infocommunications (CogInfoCom), 2013 IEEE 4th International Conference on (pp. 351-356). IEEE.

SUBMISSION GUIDELINES
You may send your manuscript now or up until the deadline. Submitted papers should not have been published previously, nor be under consideration for publication elsewhere. We also encourage authors to send us their tentative title and short abstract to the Editorial Office (futureinternet@mdpi.com) for approval.

If you are currently preparing your manuscript or would like to contribute a paper for this interesting issue, please feel free to contact us. For further details on the submission process, please see the instructions for authors at the journal website. Each new submission will be processed as quickly as possible and published on acceptance.

IMPORTANT DATES
Manuscript Due: February 15, 2016

GUEST EDITORS
Prof. Salvatore Carta, University of Cagliari (Italy) - salvatore@unica.it
Dr. Ludovico Boratto, University of Cagliari (Italy) - ludovico.boratto@unica.it