In this article the notion of relation work will be put forward to describe efforts of connecting people and artefacts in a multitude of ways as part of facilitating global interaction and coordination in an engineering firm. Relation work can be seen as a parallel to the concept of articulation work. Articulation work describes efforts of coordination necessary in cooperative work, but, arguab...

singular perturbation problems have been studied by many mathematicians. since the approximate solutions of these problems are as the sum of internal solution (boundary layer area) and external ones, the formation or non-formation of boundary layers should be specified. this paper, investigates this issue for a singular perturbation problem including a first order differential equation with gen...

This is a report on the experience of creating the Rede Brasil de Bibliotecas Comunitárias (RBBC), an online social network that aims to bring together and share information regarding practices employed in setting up local library collections and making them available to the public; discussing the principles that govern the autonomous management of these spaces; establishing ties and creating e...