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Lisbon, Portugal

Universidade Autónoma de Lisboa is a private university located in Lisbon, the capital of Portugal. UAL was founded on December 13, 1985.Its seat is in the Palace of the Counts of Redondo Wikipedia.

Silva R.,Autonomous University of Lisbon | Silva J.S.,University of Coimbra | Boavida F.,University of Coimbra
Proceedings of the IEEE International Conference on Industrial Technology | Year: 2015

Mobility support is one of the main requirements in current wireless sensor networks (WSN), as WSN technology becomes mature and its range of applications gets wider. Due to the very nature of WSNs, along with their use in all sorts of Internet of Things (IoT) scenarios, it is frequent that sensor nodes, or even groups of sensor nodes, need to change their wireless point of attachment without losing connectivity. Nevertheless, mobility support in WSNs has not yet been standardized and, therefore, mobility is still looked at as a challenge. This is even more so in critical, industrial scenarios. In this paper we present and evaluate a new infrastructure-based mobility solution for WSNs, named Network of Proxies (NoP), developed for the referred type of scenarios. NoP was deployed and tested in a critical use case, namely for monitoring employees' vital signs status in an oil refinery, with the aim of evaluating its feasibility and performance. The results show that NoP is capable of efficiently handling mobility, outperforming existing solutions and meeting the stringent case-study requirements. © 2015 IEEE.

Silva R.,Autonomous University of Lisbon | Sa Silva J.,University of Coimbra | Boavida F.,University of Coimbra
2015 IEEE 10th International Conference on Intelligent Sensors, Sensor Networks and Information Processing, ISSNIP 2015 | Year: 2015

Large urban areas are nowadays covered by millions of wireless devices, including not only cellular equipment carried by their inhabitants, but also several ubiquitous and pervasive platforms used to monitor and/or actuate on a variety of phenomena in the city area. Whereas the former are increasingly powerful devices equipped with advanced processors, large memory capacity, high bandwidth, and several wireless interfaces, the latter are typically resource constrained systems. Despite their differences, both kinds of systems share the same ecosystem, and therefore, it is possible to build symbiotic relationships between them. Our research aims at creating a resource-sharing platform to support such relationships, in the perspective that resource unconstrained devices can assist constrained ones, while the latter can extend the features of the former. Resource sharing between heterogeneous networks in an urban area poses several challenges, not only from a technical point of view, but also from a social perspective. In this paper we present our symbiotic resource-sharing proposal while discussing its impact on networks and citizens. © 2015 IEEE.

Von Humboldt S.,ISPA University | Leal I.,ISPA University | Laneiro T.,Autonomous University of Lisbon | Tavares P.,University of Lisbon
Stress and Health | Year: 2013

To date, little research has yet focused in broad assessment for management consultancy professionals. This investigation aims to analyse management consultants' self-perceptions of occupational stress (SPoOS), sources of stress (SoS) and stress management strategies (SMS) and to find latent constructs that can work as major determinants in consultants' conceptualization of SPoOS, SoS and SMS. Measures were completed, including demographics and interviews. Complete data were available for 39 management consultants, 53.8% male and aged between 23 and 56 years (M = 38.0; SD = 9.2). The data were subjected to content analysis. Representation of the associations and latent constructs were analysed by a multiple correspondence analysis. Results indicated that 'intellectual disturber' (31.4%) was the most referred SPoOS, 'high workload' (15.1%) was identified as the most prevalent perceived SoS and 'coaching' (19.0%) was the most mentioned SMS. No significant differences between the two gender groups were found regarding the three total scores. SPoOS was explained by a two-factor model: 'organization-oriented' and 'person-oriented'. A three-dimension model formed by 'job concerns', 'organizational constraints' and 'career expectations' was indicated as a best-fit solution for SoS, and SMS was best explained in a three-dimension model by 'group dynamics strategies', 'organizational culture strategies' and 'individual support strategies'. This research makes a unique contribution for a better understanding of what defines SPoOS, SoS and SMS for management consultants. Copyright © 2013 John Wiley & Sons, Ltd.

Delgado M.,Piaget Institute | Pereira R.,Autonomous University of Lisbon | Dias A.,Higher Institute of Management
World Review of Entrepreneurship, Management and Sustainable Development | Year: 2015

Investment contract duration is a key parameter for venture capital funds operation. Variables influencing the decision around this parameter are usually treated in general principles in the classical financial literature leaving plenty of room for context sensitive research. As such, we studied variables influencing investment contract duration by investigating the performance of mature Portuguese firms that have been (partially) held by venture capital funds. Using a sample of 38 firms, sold out by venture capital funds between 1995 and 2004 we evaluated the performance of these firms using performance and sustainability indicators. We found evidence that sales growth, exports, book value, headcount and a good coverage of ISO standards implementation influenced the investment contract duration. Copyright © 2015 Inderscience Enterprises Ltd.

Silveira P.E.,Autonomous University of Lisbon | Silveira P.E.,Lusiada University of Lisbon
Advances in Intelligent Systems and Computing | Year: 2015

Structuring the information and knowledge needed to implement a factory, as well as doing its control and management by computer systems, is the purpose of the meta-model and solutions here presented. This meta-model includes: an object-oriented model to structure the needed information and knowledge; a model for manufacturing systems; a prototype that integrates the two previously referred models with real time control, in order to plan and to realize the management of a factory. A first step of this work has been accomplished at the Ephestia Kuehniella Bio-factory, controlled by computer in the Laboratory of the Biology Department at the University of Azores. In this paper we present a meta-model for a factory planning, controlling and managing, with updated conceptual and technological options, preparing the way for a new industrial implementation of the above mentioned Biofactory. © Springer International Publishing Switzerland 2015.

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