In this paper we present a survey of the methods used by a selection of successful free andopen source projects to exchange, store and retrieve knowledge. In particular, we look into mailing lists, Internet Relay Chat, conferences, and code reviews. We explore how historical records left during the development become stored knowledge that can be subsequently retrieved. We also discuss the exist...

This paper concerns two-hop communication over relay-assisted Block fading channel. It is assumed there is not a direct link between the transmitter and the affiliated destination and the communication occurs in two hops through the use of a relay, where the amplify and forward (AF) strategy is employed at this node. In this case, in a Rayleigh block fading channel, the optimal weight function ...

Overlay routing has emerged as a promising approach to improve reliability and efficiency of the Internet. For one-hop overlay source routing, when a given primary path suffers from the link failure or performance degradation, the source can reroute the traffic to the destination via a strategically placed relay node. However, the over-heavy traffic passing through the same relay node may cause...

Internet Drafts are draft documents valid for a maximum of six months. Internet Drafts may be updated, replaced, or obsoleted by other documents at any time. It is not appropriate to use Internet Drafts as reference material or to cite them other than as a "working draft" or "work in progress." Please check the I-D abstract listing contained in each Internet Draft directory to learn the current...

From practical and theoretical viewpoints, performance analysis of communication systems by using information-theoretic results is important. In this paper, based on our previous work on Multiple Access Channel (MAC) and Multiple Access Relay Channel (MARC), we analyze the impact of a relay on the fundamental wireless communications concept, i.e., coverage region of MARC, as a basic model for u...

While the Internet is designed to accommodate multiple transport and application layer protocols, a large and growing fraction of Internet traffic runs directly over HTTP. Observing that HTTP is poised to become the de-facto “narrow waist” of the modern Internet, this paper asks whether an HTTP narrow waist, compared with the an IP-layer waist, facilitates a more evolvable Internet. Evolvabilit...

Individuals are increasingly turning to computermediated communication in order to get information on which to base their decisions. For instance, many consumers are using newsgroups, chat rooms, forums, e-mail list servers, and other online formats to share ideas, build communities and contact other consumers who are seen as more objective information sources (Kozinets, 2002). These social gro...

The potential of synchronous chat through the Internet to improve online learning experiences has rarely been discussed by researchers. The case study reported in this paper discovers the needs of synchronous communication and assesses the value of online chats in distance-learning environments. Both qualitative and quantitative methods were used to analyze the value of the chat sessions. Insig...

The number of people connected to the Internet and the number of Web page visits have increased exponentially over the past years. The Internet has become one of the most important and most used media for communication and learning, as it allows for the creation of interactive and collaborative environments, whose contents and resources can be shared with a limitless number of users. Among the ...