Joao Oliveira

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The iris is regarded as one of the most useful traits for biometric recognition and the dissemination of nationwide iris-based recognition systems is imminent. However, currently deployed systems rely on heavy imaging constraints to capture near infrared images with enough quality. Also, all of the publicly available iris image databases contain data(More)
Fiscal Management in Federal Democracies: Argentina and Brazil In the 1980s, Argentina and Brazil faced similar problems, with subnational deficits adding to excess public deficits and high inflation. In the 1990s both countries continued with fiscal decentralization and with the struggle to bring about macroeconomic stability. At least up to 1998,(More)
iCO<sub>2</sub> is a networked game that aims to collect human driving behavior data at scale and help researchers better understand how people apply eco-driving practices. iCO<sub>2</sub> is an integrated multiplatform game that can be accessed via Web client on Facebook and iPad clients, and supports a shared traffic experience among its users. Here, the(More)
The aim of this work is to continue the cooperation on Fixed WiMAX experimental propagation characterization between Instituto de Telecomunica&#x00E7;&#x00F5;es &#x2014; DEM of University of Beira Interior, Portugal, Fondazione Ugo Bordoni and the Department of Electronics and Information Systems of the University of Bologna, both from Italy. The field(More)
The paper reports the results of exploratory research relating to management accounting evolution in an international company. A case study illustrates most arguments advocating an intra-firm convergence. Evidence is presented indicating how the management accounting system (MAS) becomes increasingly standardised. The design and most standard operations of(More)
Virtual environments offer an ideal setting to develop intelligent training applications. Yet, their ability to support complex procedures depends on the appropriate integration of knowledge-based techniques and natural interaction. In this article, we describe the implementation of an intelligent rehearsal system for biohazard laboratory procedures, based(More)
Dear Editor, I read with great interest the recent article by Baker et al., 2013, reporting a patient with dystonia, bilateral brain calcifications, and carrying a remarkable heterozygous deletion (~500 Kb), covering various interesting genes [1]. The authors highlight SLC20A2 and THAP1, both associated with familial brain calcification and dystonia,(More)
Layered and cooperative elements such as femto-cells and relays can improve performance or energy efficiency in mobile networks; however, they consume energy per se and their durations in operational state must therefore be minimised. This paper investigates the use of relays in WiMAX network deployments and concentrates on the cost/revenue performance and(More)