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Publicações

2018

Wireless Communication Technologies for Safe Cooperative Cyber Physical Systems

Autores
Balador, A; Kouba, A; Cassioli, D; Foukalas, F; Severino, R; Stepanova, D; Agosta, G; Xie, J; Pomante, L; Mongelli, M; Pierini, P; Petersen, S; Sukuvaara, T;

Publicação
SENSORS

Abstract
Cooperative Cyber-Physical Systems (Co-CPSs) can be enabled using wireless communication technologies, which in principle should address reliability and safety challenges. Safety for Co-CPS enabled by wireless communication technologies is a crucial aspect and requires new dedicated design approaches. In this paper, we provide an overview of five Co-CPS use cases, as introduced in our SafeCOP EU project, and analyze their safety design requirements. Next, we provide a comprehensive analysis of the main existing wireless communication technologies giving details about the protocols developed within particular standardization bodies. We also investigate to what extent they address the non-functional requirements in terms of safety, security and real time, in the different application domains of each use case. Finally, we discuss general recommendations about the use of different wireless communication technologies showing their potentials in the selected real-world use cases. The discussion is provided under consideration in the 5G standardization process within 3GPP, whose current efforts are inline to current gaps in wireless communications protocols for Co-CPSs including many future use cases.

2018

Modelling, Trajectory Planning and Control of a Quadruped Robot Using Matla® /Simulink™

Autores
Oliveira, I; Barbosa, R; Silva, M;

Publicação
ROBOT 2017: THIRD IBERIAN ROBOTICS CONFERENCE, VOL 2

Abstract
Due to the difficulty of building and making control tests in real robots, it is usual to first have a simulated model that provides a good approach of a real robot's behaviour. The importance of a good control system in execution of a planned trajectory inspired this work, whose purpose is to design a control system for a quadruped robot and test its performance.

2018

Prototyping an autonomous system to stimulate the interaction and preserve the elderly's social bonds Development of a prototype to validate the interaction model

Autores
Xavier, R; Reis, A; Paredes, H; Barroso, J;

Publicação
2018 13TH IBERIAN CONFERENCE ON INFORMATION SYSTEMS AND TECHNOLOGIES (CISTI)

Abstract
Aging is a natural process inherent in being human. During the aging process a person's physical and mental condition will degrade, imposing limitations on their life, which can have a great impact on their well-being. Although they are common to all humans, the consequences of aging can be aggravated by the decline in social relations and contact with family and friends. It is therefore of the utmost importance to maintain these relationships throughout life. In this sense, we intend to develop a system to support these people, allowing them to overcome their limitations, promoting and reinforcing the bonds between the user and the elements of his family and group of friends, using the technology. In this article we discuss the prototyping of a support system for the elderly to combat the lack of interaction between these individuals and their social group. With the use of prototyping it s intended a previous validation of the concept and functionalities of this system. The user is placed within the development process and, in this way, it is possible to evaluate the Human-Machine Interaction component and to detect possible problems so that they can be solved in a timely manner. This is an iterative process in which the system is constantly evaluated and readjusted until it is validated.

2018

Maize leaf area estimation in different growth stages based on allometric descriptors

Autores
Mario, C; Isabel, P; Sosdito, EM;

Publicação
African Journal of Agricultural Research

Abstract

2018

Single-Phase Cascaded H-Bridge Inverters Without Power Regeneration

Autores
Monteiro, AP; Jacobina, CB; de Freitas, NB; Mello, JPA;

Publicação
2018 IEEE Energy Conversion Congress and Exposition (ECCE)

Abstract

2018

Quantitative and qualitative analysis of ictal vocalization in focal epilepsy syndromes

Autores
Hartl, E; Knoche, T; Choupina, HMP; Remi, J; Vollmar, C; Cunha, JPS; Noachtar, S;

Publicação
SEIZURE-EUROPEAN JOURNAL OF EPILEPSY

Abstract
Purpose: To investigate the frequency, localizing significance, and intensity characteristics of ictal vocalization in different focal epilepsy syndromes. Methods: Up to four consecutive focal seizures were evaluated in 277 patients with lesional focal epilepsy, excluding isolated auras and subclinical EEG seizure patterns. Vocalization was considered to be present if observed in at least one of the analyzed seizures and not being of speech quality. Intensity features of ictal vocalization were analyzed in a subsample of 17 patients with temporal and 19 with extratemporal epilepsy syndrome. Results: Ictal vocalization was observed in 37% of the patients (102/277) with similar frequency amongst different focal epilepsy syndromes. Localizing significance was found for its co-occurrence with ictal automatisms, which identified patients with temporal seizure onset with a sensitivity of 92% and specificity of 70%. Quantitative analysis of vocalization intensity allowed to distinguish seizures of frontal from temporal lobe origin based on the intensity range (p = 0.0003), intensity variation (p < 0.0001), as well as the intensity increase rate at the beginning of the vocalization (p = 0.003), which were significantly higher in frontal lobe seizures. No significant difference was found for mean intensity and mean vocalization duration. Conclusions: Although ictal vocalization is similarly common in different focal epilepsies, it shows localizing significance when taken into account the co-occurring seizure semiology. It especially increases the localizing value of automatisms, predicting a temporal seizure onset with a sensitivity of 92% and specificity of 70%. Quantitative parameters of the intensity dynamic objectively distinguished frontal lobe seizures, establishing an observer independent tool for semiological seizure evaluation.

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