We obtained BV IC photometry of IRC−10443 in 85 different nights distributed over two years, and in addition low resolution absolute spectrophotometry and high resolution Echelle spectroscopy. Our data show that IRC −10443, which was never studied before in any detail, is a SRa variable, characterized by ∆B=1.27, ∆V=1.14 and ∆I=0.70 mag amplitudes and mean values =13.75, =11.33 and =...

Media choice theories conceptualize decisions people make when they are faced with communication media alternatives to fit a communicative need. In this paper we address two gaps in extant research on media choice. First, we show that media choices may be intimately intertwined with the questions of power. The second contribution comes from situating an online community as the focus of media ch...

Mobile application developers need to design their applications with the constraints of the network in mind. In comparison to inexpensive home broadband networks, mobile networks often exhibit high levels of latency and have limited bandwidth. Another significant difference between these networks is the cost of transporting data. Mobile network operators often apply usage tariffs, especially if...

Cyber-criminals around the world are using Internet-based communication channels to establish trade relationships and complete fraudulent transactions. Furthermore, they control and operate publicly accessible information channels that serve as marketplaces for the underground economy. In this work, we present a novel system for automatically monitoring these channels and their participants. Ou...

This study examines the impact of Internet usage on the self-identity development in 10 students between the ages of 12 and 18. Using Erickson's Ego Identity Theory, the computer mediated communication (CMC) practices of students from private and public schools are evaluated through in-depth interviews. All students are frequent users of instant relay chat (IRC) and have a minimum of one year o...

in April 2000. His research interests include the management of social interaction in CMC systems, the links between CMC research and design, and the processes of interpersonal networking. Reader in the Department of English at The University of Queensland. She is the author of The Language of Negotiation and the Handbook of Persuasive Tactics. Her research interests include textual practices i...

Internet Relay Chat (IRC) systems have become an increasingly popular social medium in the cyberspace. The main goal of the Multimedia Communication System (MMC) is to extend the functionality of traditional text based IRCs systems by adding such multimedia technologies as voice, digital sketching and a shared browser to create a tool for educational purposes. The idea is to create a virtual st...

In this paper, we develop a technique to measure how congruent the actual organizational communication channels are relative to the coordination requirement imposed by the dependencies among tasks. We examine the role of congruence in the context of a closed source project of a large distributed system. Our results show that congruence helped reduce resolution time of software modification requ...

Effective communication is an important issue for global software development. Due to geographical limitations and travel challenges, face-toface meetings are expensive to schedule and run. Web-based communication methods are thus the primary means of communication in global software development efforts. In general. two types of web-based communication mechanisms exist: synchronous and asynchro...