Diogo Henriques

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The number and size of 3D object repositories have been increasing at a considerable rate. Consequently, finding a specific 3D model in such collections is getting more difficult. Current 3D search engines do not take advantage of novel interaction technologies, usually presenting query results in grids of thumbnails. This greatly hinders objects’(More)
The number of available three-dimensional digital objects has been increasing considerably. As a result, retrieving such objects from large collections has been subject of research. However, proposed solutions do not explore natural interactions in their interfaces. In this work, we propose a speech interface for 3D object retrieval in immersive virtual(More)
Query specification for 3D object retrieval still relies on traditional interaction paradigms. The goal of our study was to identify the most natural methods to describe 3D objects, focusing on verbal and gestural expressions. Our case study uses LEGO R © blocks. We started by collecting a corpus involving ten pairs of subjects, in which one participant(More)
This paper proposes Zás, a novel, flexible, and expressive authorization mechanism for Java. Zás has been inspired by Ramnivas Laddad’s proposal to modularize Java Authentication and Authorization Services (JAAS) using an Aspect-Oriented Programming (AOP) approach. Zás’ aims are to be simultaneously very expressive, reusable, and easy to use and configure.(More)
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