International Journal of Engineering Research and Development ISSN: 2278-067X, Volume 1, Issue 11 (July 2012), PP. 17-22 www.ijerd.com 17 Implementation of Back Channel using Visual Interface Ramesh Kotcherla 1 , Kapu Nageswara Rao 2 , Vasumathi D 3 1,2 Mother Theresa Institute of Science &Technology, Sattupally, Andhra Pradesh, India 3 Dept of CSE, JNTU Hyderabad, India Abstract––Micro blogging communities like ‘twitter’ are being used heavily by the people in now a days to share their views on globally happening issues. Blogs like ‘twitter’ are being used only as digital back channel s where information will be displayed in the form of lists only. From digital back channel, people have to distract from their current conversation in order to know the information regarding other conversations happening around. Also digital back channels are lacked in the ability of displaying past history of current conversation. On the other hand, we propose visual back channel which provides interactive visual overview of ongoing conversations on a back channel. To incorporate visualization for continuously updating information, we include current conversation and its past history as well. As part of fully web based coordinated system, we introduce topic streams; a stacked graph visualizes topics over time, people spiral-representing participants and image cloud- describing the degree of sharability of images by their size. Keywords––digital back channel, micro blogging communities, topic streams, ,information retrieval, post listing, people spiral, image cloud. I. INTRODUCTION These days, as people are really interested to share their timely pieces of information regarding international ongoing happenings; they are attracted to use digital back channels, which create persistent conversations about events of social significance. Digital backchannels have become an exciting communication medium, over which more and more people exchange impressions, suggestions, and comments during events. Such backchannels not only enable participants to share their experience and shape how observers recognize an event, they are also used to help participants to describe an event and its outcome. We can observe certain drawbacks with existing methods of displaying information in current digital back channel system, the chronologically ordered lists themselves are not sufficient for large-scale backchannels as they are unable to represent enough information in real-time conversation scenarios. This may affect those participants to get distracted from the main event, and lack an overview of what the backchannel contains [1, 2]. To explore these issues, we introduce Visual Backchannel, an interactive and versatile interface that integrates three visualizations with a list of backchannel posts. In order to give new perspectives on backchannel conversations, we introduce Topic Streams [4], a temporally and topically adjustable stacked graph that visualizes topics extracted from digital backchannel conversations. This is accompanied by two compact visualizations, People Spiral[4] and an Image Cloud[4], presenting visual aggregates of active participants and shared images. This way Visual Backchannel provides visual evidence of what is happening now, and what is recent within the ongoing temporal context of how backchannel conversations spread out over time. We provide representations of a constantly changing data set, and interactive access to the temporal distribution of topics, the most active participants, and salient photographic impressions. With this work, we introduce three novel interactive visualizations that summarize the main facets of large-scale backchannels and provide exploratory interactivity along time, topics, and people in the context of a Visual Backchannel interface. II. RELATED WORK Our work can be situated in the context of visualizing persistent conversations, experiencing digital backchannels during a wide range of events, and representing topics over time. A. Visualization of constant Conversations Previous research on visualization of human communication considered mostly its social and expressive aspects only. Email exchanges can be visualized as thread arcs representing reply structure and temporal order. We are interested in providing overviews of the main topics being discussed. In contrast to social and structural aspects of conversations, little visualizations attempted to represent the actual topics being discussed. Conversation Map displays participants, salient topics [3]. The mail visualizes how topics in personal email conversations develop over time using stacked lists of keywords arranged along a horizontal time axis [5]. Both Conversation Map and The mail provide content-based perspectives on conversations; however, they have only been applied to archives after the fact, not to real-time conversations as they open up. While the former summarizes who is and has been