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Publications

Publications by HumanISE

2011

COMPARATIVE PERFORMANCE ANALYSIS OF SUPPORT VECTOR MACHINES CLASSIFICATION APPLIED TO LUNG EMPHYSEMA IN HRCT IMAGES

Authors
Vasconcelos, V; Marques, L; Barroso, J; Silva, JS;

Publication
IMAGAPP & IVAPP 2011: PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON IMAGING THEORY AND APPLICATIONS AND INTERNATIONAL CONFERENCE ON INFORMATION VISUALIZATION THEORY AND APPLICATIONS

Abstract
High-resolution computed tomography (HRCT) became an essential tool in detection, characterization and follow-up of lung diseases. In this paper we focus on lung emphysema, a long-term and progressive disease characterized by the destruction of lung tissue. The lung patterns are represented by different features vectors, extracted from statistical texture analysis methods (spatial gray level dependence, gray level run length method and gray level difference method). Support vector machine (SVM) was trained to discriminate regions of healthy lung tissue from emphysematous regions. The SVM model optimization was performed in the training dataset through a cross validation methodology, along a grid search. Three usual kernel functions were tested in each of the features sets. This study highlights the importance of the kernel choice and parameters tuning to obtain models that allow high level performance of the SVM classifier.

2011

Ontologies for meeting contents awareness - MTO and IGMTO

Authors
Freitas, CF; Martins, H; Barroso, J; Ramos, C;

Publication
WORKSHOP PROCEEDINGS OF THE 7TH INTERNATIONAL CONFERENCE ON INTELLIGENT ENVIRONMENTS

Abstract
In this article we will discuss that the Intelligent or Smart Meeting Rooms (SMR) spaces will have to understand what is going in the meetings and even what participants are discussing. In this way we believe it is possible to supply intelligent feedback. In order to fill this gap we came to propose an extensible Meeting Task Ontology (MTO) that is able to represent in detail what knowledge is present in Meetings for group decision-making. We also propose an extension to this ontology, the IGMTO ontology, that specifically focuses on the knowledge present in the Idea Generation (IG) Process. We believe that the Idea Generation process modeled with these two ontologies, who provide a link between the ideas and problems of a meeting to a domain ontology, it will be possible to give awareness of meeting contents to a SMR space.

2011

Fiducials marks detection to assist visually impaired people navigation

Authors
Costa, P; Fernandes, H; Vasconcelos, V; Coelho, P; Barroso, J; Hadjileontiadis, L;

Publication
International Journal of Digital Content Technology and its Applications

Abstract
Assistive technology enables people to achieve independence in the accomplishment of their daily tasks and enhance their quality of life. Visual information is the basis for most navigational tasks, so visually impaired individuals are at disadvantage due to the lack of information or given unsufficient information about their surrounding environment. With the recent advances in inclusive technology it is possible to extend the support given to people with visual disabilities during their mobility. In this context we propose and describe the SmartVision project, whose global objective is to assist visually impaired people in their navigation through unknown indoor and outdoor environments. This paper is focused mainly on the Computer Vision module of the SmartVision prototype, were we propose a new algorithm to recognise fiducials marks suitably placed on sidewalks, revealing to be a promising solution.

2011

Context aware middleware for supporting Idea Generation meetings in Smart Decision Rooms

Authors
Freitas, CF; Meireles, A; Figueiredo, L; Barroso, J; Ramos, C;

Publication
Proceedings - 4th International Conference on Ubi-Media Computing, U-Media 2011

Abstract
In a globalized world members of groups may be anywhere, and the need for ubiquitous Idea Generation emerged. This led to two main needs: the creation of Smart Decision Rooms prepared for this new reality and following the Ambient Intelligence paradigm; and the creation of context aware middleware. This paper describes OLAVAmI a context aware middle-ware system which was tested in LAID environment, a Smart Meeting Room. OLAVAmI allows video production focusing on the speaker, an audio-to-text conversion service, and the multimedia database of meetings produced in an autonomous way. To experiment OLAVAmI usage and functionalities one of the tools present in LAID test bed was used and the results are presented in this article. © 2011 IEEE.

2011

SIDE - Teaching support information system

Authors
Barbosa, LF; Alves, P; Barroso, J;

Publication
Proceedings of the 6th Iberian Conference on Information Systems and Technologies, CISTI 2011

Abstract
This paper presents the SIDE portal, which is an information system to support teaching, focused on academic management and teaching and learning processes, meeting the needs of integration of information flows from several university information systems. SIDE portal plays a fundamental role in the institution, enabling learning, evaluation and communication without space or time limitations, allowing to meet the challenges of higher education institutions - increase the education capacity and simultaneously be more efficient in academic management processes. © 2011 AISTI.

2011

WebRun

Authors
Araujo, P; Dias, T; Castanheira, J; Prata, P; Barroso, J;

Publication
Proceedings of the 6th Iberian Conference on Information Systems and Technologies, CISTI 2011

Abstract
Promoting a healthy lifestyle, including the practice of sport activities, is a very topical subject. In this paper, we present a project related to a game that allows two or more players to take part in competitive running using a simulator consisting of physical equipment, a fixed bike, a controller and a supervisor program. The main goal is the promotion of sports through computer games. © 2011 AISTI.

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