The notion of “community” has often been caught between concrete social relationships and imagined sets of people perceived to be similar. The rise of the Internet has refocused our attention on this ongoing tension. The Internet has enabled people who know each other to use social media, from e-mail to Facebook, to interact without meeting physically. Into this mix came Twitter, an asymmetric microblogging service: If you follow me, I do not have to follow you. This means that connections on Twitter depend less on in-person contact, as many users have more followers than they know. Yet there is a possibility that Twitter can form the basis of interlinked personal communities—and even of a sense of community. This analysis of one person’s Twitter network shows that it is the basis for a real community, even though Twitter was not designed to support the development of online communities. Studying Twitter is useful for understanding how people use new communication technologies to form new social connections and maintain existing ones.

No abstract

In this paper we describe a system that allows users to annotate digital photos at the time of capture. The system uses camera phones with a lightweight client application and a server to store the images and metadata and assists the user in annotation on the camera phone by providing guesses about the content of the photos. By conducting user interface testing, surveys, and focus groups we were able to evaluate the usability of this system and motivations that will inform our development of future mobile media annotation applications. In this paper we present usability issues encountered in using a camera phone as an image annotation device immediately after image capture and users' responses to use of such a system.

If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. AbstractPurpose -The paper's aim is to describe the world of retrocomputing, a constellation of largely non-professional practices involving old computing technology. It seeks to show how retrocomputing serves the goals of collection and preservation, particularly in regards to historic software, and how retrocomputing practices challenge traditional notions of authenticity. It then seeks to propose an alternative conceptualization and suggest new avenues for collaboration between retrocomputing practitioners and memory institutions. Design/methodology/approach -The paper is based on extensive observation of retrocomputing projects, conducted primarily online. Findings -Retrocomputing includes many activities that can be seen as constituting collection and preservation. At the same time, it is often transformative, producing assemblages that "remix" fragments from the past with newer elements or joining together historic components that were never combined before. While such "remix" may seem to undermine preservation, it also allows for fragments of computing history to be reintegrated into a living, ongoing practice, contributing to preservation in a broader sense. The seemingly unorganized nature of retrocomputing assemblages also provides space for alternative "situated knowledges" and histories of computing, which can sometimes be quite sophisticated.Research limitations/implications -Retrocomputing challenges established notions of collection and preservation. A "situated knowledges" perspective provides a possible resolution. Practical implications -Retrocomputing presents memory institutions (and libraries in particular) with an opportunity for new forms of collaboration in collection and preservation of software applications. Originality/value -The paper puts at the center the ways in which retrocomputing challenges the established notions of collection and preservation. It offers alternative conceptualizations that suggest new forms of collaboration.

for comments and suggestions. We also would like to thank for comments seminar participants at CMU, Microsoft Research and Fifth biannual conference on the Economics of the Software and Internet Industries. The views expressed herein are those of the author(s) and do not necessarily reflect the views of the National Bureau of Economic Research. NBER working papers are circulated for discussion and comment purposes. They have not been peerreviewed or been subject to the review by the NBER Board of Directors that accompanies official NBER publications.