%0 Conference Proceedings %B Fifth International Conference on Open Source Software %D 2009 %T Heartbeat: Measuring Active User Base and Potential User Interest in FLOSS Projects %A Wiggins, Andrea %A Howison, James %A Crowston, Kevin %X This paper presents a novel method and algorithm to measure the size of an open source project’s user base and the level of potential user interest that it generates. Previously unavailable download data at a daily resolution confirms hypothesized patterns related to release cycles. In short, regular users rapidly download the software after a new release giving a way to measure the active user base. In contrast, potential new users download the application independently of the release cycle, and the daily download figures tend to plateau at this rate when a release has not been made for some time. An algorithm for estimating these measures from download time series is demonstrated and the measures are examined over time in two open source projects. %B Fifth International Conference on Open Source Software %S IFIP International Federation for Information Processing %I Springer Boston %C Skövde, Sweden %V 299/2009 %P 94-104 %8 06/2009 %U http://www.springerlink.com/content/77171q7g41305214/ %R 10.1007/978-3-642-02032-2_10 %0 Conference Proceedings %B Fourth International Conference on Open Source Software %D 2008 %T Social dynamics of FLOSS team communication across channels %A Wiggins, Andrea %A Howison, James %A Crowston, Kevin %X This paper extends prior investigation into the social dynamics of free and open source (FLOSS) teams by examining the methodological questions arising from research using social network analysis on open source projects. We evaluate the validity of data sampling by examining dynamics of communication centralization, which vary across multiple communication channels. We also introduce a method for intensity-based smoothing in dynamic social network analysis. %B Fourth International Conference on Open Source Software %S IFIP International Federation for Information Processing %I Springer Boston %C Milant, Italy %V 275/2008 %P 131-142 %8 07/2008 %U http://www.springerlink.com/content/p581l146354n9k07 %R 10.1007/978-0-387-09684-1_11