Nelson Silva

Over the last years, multimedia collections have largely increased as new items are produced every day, such as pictures, audio/music or video. In Multimedia Information Retrieval, this exponential growth leads content-based approaches to gain advantage over other solutions, not only because they take advantage of the intrinsic information containe...

Every time we visit a new city there is a huge effort made in understanding its dynamic, i.e. what are the relevant locations within that city in each time period, for there are large amounts of data to sift through. Although several attempts have been made to combine information from various sources, the majority focus on geographic data, lacking...

The interactive creation of comics on the World Wide Web has become increasingly relevant over the last few years as a way for amateur creators to produce, share and distribute their comics. However, web applications that allow this kind of creation still restrict users interaction by not considering the repetition of previous elements across a com...

Over the last years, amateur artists have been using the new Internet technologies to easily produce, share and distribute their comics. However, web applications for this kind of creation are still restricting users by adopting simple and very limiting interaction methods. Therefore, these systems do not allow the creation of visually rich comics...

Abtract The concurrent engineering and the co-operative engineering in a geographically distributed network, supported by information technologies, is a competitive advantage for the tool and die Portuguese companies. In this paper a new user-friendly visual communication tool to support virtual meetings in an engineering context is presented. The...

Throughout the last decade many approaches have been made to the problem of developing CAD systems that are usable in the early stages of product ideation. Although most of these approaches rely on some kind of drawing paradigm and on the paper-and-pencil metaphor, only a few of them deal with the ambiguity that is inherent to natural languages in...

GIDes ++ is a gesture based calligraphic 3D modeller using expectation lists, and extends the notion of natural and efficient interface. A brand new look and a new modeller kernel empower the modelling capabilities. A measures layer enables the user to visualize and change measures, giving a new dimension in precise and accurate modelling. Adding n...

Over the last years, casual and amateur artists have been using the emerging Internet technologies to easily pro-duce, share and distribute their web comics. However, easi-ness and quickness are not enough. These web applications to create comics still show very simple and static interaction methods, restricting users' experience. With this paper,...