Os Media Participativos e a importância do Cidadão e da Instituição enquanto Marcas mobilizadoras na área da Oncologia

Present paper aims at surveying the relevance that brands and identities may have in participatory platforms in the context of oncology. Despite the fact that these platforms provide the same tools to citizens and institutions alike, their capacity for mobilization is distinct. In general, institutions seem to be more successful, although this is not always the case. Discussing the concept of brand and identity, as well as understanding how the differences between citizens and institutions may blur within the context of new media, may contribute to answering the above question. We anchor our analysis on the study of social network Facebook, oncological institutions and citizen support groups, and various health studies. The ultimate goal will be the clarification of the importance of brands and identity as a contributive factor towards new solutions in participatory media

Design de Ações Culturais Participativas: um Caso de Estudo no Centro Histórico da Cidade do Porto

In this paper we present the methodologies and preliminary conclusions of the first phase of the work of construction of audiovisual narratives related to the project “Manobras no Porto”, which will serve as a case study for the main research project entitled: “The Museum of All: Institutional Communication Practices in a Participatory Networked World”. The main objective of this research project is to understand how the use of collective and participatory creation of identities and narratives can contribute to get audiences engaged with cultural institutions and events. We intend to identify the effects and measure the dynamics of participation of audiences in the construction of audiovisual objects, and understand how these may influence the reconfiguration of the missions of the institutions and cultural projects, in the development of societies.

Electromagnetic tracker feasibility in the design of a dental superstructure for edentulous patients

The success of the osseointegration concept and the Brånemark protocol is highly associated to the accuracy in the production of an implant-supported prosthesis. One of most critical steps for long-term success of these prosthesis is the accuracy obtained during the impression procedure, which is affected by factors such as the impression material, implant position, angulation and depth. This paper investigates the feasibility of 3D electromagnetic motion tracking systems as an acquisition method for modeling full-arch implant-supported prosthesis. To this extent, we propose an implant acquisition method at the patient mouth and a calibration procedure, based on a 3D electromagnetic tracker that obtains combined measurements of implant’s position and angulation, eliminating the use of any impression material. Three calibration algorithms (namely linear interpolation, higher-order polynomial and Hardy multiquadric) were tested to compensate for the electromagnetic tracker distortions introduced by the presence of nearby metals. Moreover, implants from different suppliers were also tested to study its impact on tracking accuracy. The calibration methodology and the algorithms employed proved to implement a suitable strategy for the evaluation of novel dental impression techniques. However, in the particular case of the evaluated electromagnetic tracking system, the order of magnitude of the obtained errors invalidates its use for the full-arch modeling of implant-supported prosthesis.