Abstract
The production of scientific publications requires usually the participation of several authors that contribute to the final result according to their role in the work being described. Nevertheless, this is obviously a cooperative activity and requires the simultaneous presence of the collaborators or the exchange of documents and annotations through email. Cooperative editors introduced a further step in the cooperation, but the current solutions do not accommodate issues like referencing and publishing. This gap motivated us to build a platform that integrates the three main functionalities required to effectively produce scientific publications: a cooperative text editor, a cooperative reference manager and a connector to scientific digital repositories. This paper presents this solution, which we called PaperFlow and was specified with the aid of a study conducted with Portuguese and Spanish researchers, which results are also presented, with the aim of evaluating the platform requirements.

Abstract
Nowadays a growing number of research and projects emphasize a culture of childhood that sees the child as an active participant in social life and, in particular, in the planning and decision processes of the spaces where they live most of their time. Under these projects children are asked to have a direct role on the configuration of several spaces, such as public and school playgrounds. This paper refers to a work in progress where a version control system for a multiuser virtual world is being developed to address some of the challenges that this kind of task and participants bring. Particularly this tool is being designed and prototyped to foster children's involvement in primary school activities where a class participation and consensus are requested on the several school spatial configurations.

Abstract
The last decade brought about several virtual communities spread all over the world composed of thousands of people with different ages and social, cultural and physical characteristics. These communities enable users to communicate and share information, often with the aim of achieving a common goal. Due to the vast diversity of users there's often a need,to control the activities that occur inside the virtual environment to avoid inappropriate behaviors. However, this control can cause a feeling of digital surveillance, but an appropriate design of the interface can help minimize its impact, becoming an important success factor for the community. For this purpose we analyzed a selection of virtual environments, conducted a survey on users' preferences and analyzed the corresponding results. From these activities we defined a set of requirements to build a 3D interface for a regulated virtual environment.

Abstract
A Social Networking System was developed for Academic Collaboration across international Projects. The system was implemented using Java Server Pages. This paper discusses the development of this software, lessons learned and it gives suggestions for further work.

Abstract
Writing scientific publications is usually a challenging and complex activity, involving several authors. Despite the different natures of their contributions, this activity is clearly collaborative and the collaboration is usually achieved through face-to-face meetings and using email to exchange the documents. More recently the availability of collaborative editors introduced a further step in the collaboration, but none of the existing solutions contemplate some specific issues like referencing and publishing adequately. This fact motivated us to conduct a study to evaluate the requirements for a platform that integrates in a single solution the three main functionalities required: a text editor, a reference manager and a connector to scientific digital repositories.

Abstract
The preservation of many music works produced in the past entails their digitalization and consequent accessibility in an easy-to-manage digital format. Carrying this task manually is very time consuming and error prone. While optical music recognition systems usually perform well on printed scores, the processing of handwritten musical scores by computers remain far from ideal. One of the fundamental stages to carry out this task is the staff line detection. In this paper a new method for the automatic detection of music staff lines based on a connected path approach is presented. Lines affected by curvature, discontinuities, and inclination are robustly detected. Experimental results show that the proposed technique consistently outperforms well-established algorithms.