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Publications

2019

A Theoretical Model for Planning NB-IoT Networks

Authors
Cruz, R; Coelho, A; Campos, R; Ricardo, M;

Publication
2019 INTERNATIONAL CONFERENCE ON WIRELESS AND MOBILE COMPUTING, NETWORKING AND COMMUNICATIONS (WIMOB)

Abstract
The growth of Internet of Things (IoT) technologies has triggered the development of low-cost solutions characterised by low energy consumption and low complexity. To interconnect these devices, some wireless communications technologies including IEEE 802.11 and IEEE 802.15.4 have been used due to their deployment and management simplicity and high scalability. However, in scenarios where the devices are physically distant or there is a massive number of devices in a reduced area, cellular technologies such as 3rd Generation Partnership Project (3GPP) Narrowband-Internet of Things (NB-IoT) are seen as the solution. This paper proposes a network planning theoretical model for NB-IoT, named NB-IoT Deterministic Link Adaptation Model (NB-DLAM), which can be used to estimate Quality of Service (QoS) metrics such as Packet Delivery Ratio (PDR), transmission time, and throughput. NB-DLAM estimations were compared with simulation results, which show the accuracy of the proposed model.

2019

Immersive Learning Research Network - 5th International Conference, iLRN 2019, London, UK, June 23-27, 2019, Proceedings

Authors
Beck, D; Ríos, AP; Ogle, JT; Economou, D; Mentzelopoulos, M; Morgado, L; Eckhardt, C; Pirker, J; Hristov, RK; Richter, J; Gütl, C; Gardner, M;

Publication
iLRN

Abstract

2019

The contribution of the internet of things to the emergence of sustainable innovative cities

Authors
Almeida, F;

Publication
Managing Sustainable Innovation

Abstract

2019

Considerations on the Usability of SClinico

Authors
Pavao, J; Bastardo, R; Pereira, LT; Oliveira, P; Costa, V; Martins, AI; Queiros, A; Rocha, NP;

Publication
BIOMEDICAL ENGINEERING SYSTEMS AND TECHNOLOGIES, BIOSTEC 2018

Abstract
To increase the quality of the health care services and, at the same time, to control their costs, the use of Electronic Health Records (EHR) has substantially increased during the last years. Usability of EHR systems is a key factor to increase their efficiency. The SClinico is an EHR system widely used in public hospitals and primary care centres of the Portuguese National Health Service and the present article reports the assessment of its usability. This usability assessment consisted in three stages: in the first stage, an exploratory assessment was carried out, while in the second stage a quantitative assessment was performed using a validated usability assessment instrument, and, finally, in the third stage a focus group involving clinicians and usability experts was conducted. The results showed that SClinico presents important usability issues and, therefore, recommendations are suggested to overcome the identified issues.

2019

Strategic fit between innovation strategies and supply chain strategies: a conceptual study

Authors
Zimmermann, R; Ferreira, LMDF; Moreira, AC;

Publication
INTERNATIONAL JOURNAL OF VALUE CHAIN MANAGEMENT

Abstract
Considering the importance of innovation and supply chain (SC) management for firms' competitiveness and the growing interest for the relationship between these two areas, this conceptual paper aims to answer the following research question: how does the fit between the different innovation strategies and SC strategies influence business performance? A literature review was conducted as the basis for developing a conceptual framework, using the principles of resource-based view and contingency theory. Different innovation and SC strategies are studied and discussed with respect to the expected effects of fit on business performance. Five propositions and a conceptual framework are presented showing the complexity of the relationship between both strategies. The conceptual model put forward helps to advance research in the area allowing for an interrelationship between innovation and SC strategies, something that has not been adequately researched, and provides insights for managers who are seeking substantive improvement of business performance.

2019

Acoustic barriers as an acoustic deterrent for native potamodromous migratory fish species

Authors
Jesus, J; Amorim, MCP; Fonseca, PJ; Teixeira, A; Natario, S; Carrola, J; Varandas, S; Pereira, LT; Cortes, RMV;

Publication
JOURNAL OF FISH BIOLOGY

Abstract
This study focused on the use of sound playbacks as acoustic deterrents to direct native potamodromous migratory species away from all kind of traps. The effects of two acoustic treatments, a repeated sine sweep up to 2 kHz (sweep-up stimulus) and an intermittent 140 Hz tone, were tested in three fish species native to Iberia: Salmo trutta, Pseudochondrostoma duriense and Luciobarbus bocagei. In contrast with S. trutta, the endemic cyprinids P. duriense and L. bocagei exhibited a strong repulse reaction to the frequency sweep-up sound. The 140 Hz stimulus did not seem to alter significantly the behaviour of any of the studied species. These results highlight the potential of acoustic stimuli as fish behavioural barriers and their application to in situ conservation measures of native Iberian fish populations, to protect them from hydropower dams. In addition, this study shows that acoustic deterrents can be used selectively on target species.

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