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Article
Importance of 24 h ambulatory blood pressure monitoring in patients with acromegaly and correlation with cardiac magnetic resonance findings
Arterial hypertension (AH) is prevalent in acromegaly, but few studies using 24-h ambulatory blood pressure monitoring (24 h-ABPM) suggest that its frequency may be different from office blood pressure (OBP). ...
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Article
Lower prevalence of congenital cytomegalovirus infection in Portugal: possible impact of COVID-19 lockdown?
Cytomegalovirus (CMV) is the most frequent cause of congenital infection all over the world. Its prevalence ranges from 0.2 to 2.2%. Transmission from children to their pregnant mothers is a well-known risk fa...
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Chapter and Conference Paper
A New Control Scheme for Neuromuscular Blockade with Optimal Initialization Time
A new strategy is proposed for the automatic control of the neuromuscular blockade during general anesthesia by means of the continuous infusion of rocuronium. This strategy is based on the reduced parameter W...
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Chapter and Conference Paper
A New Insight on State-Trimness and Minimal State-Space Realizations of Input-Output Behaviors
In this paper we study the property of state-trimness introduced in [4], which, together with observability, is a necessary and sufficient condition for the minimality of the state-space realizations of a given i...
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Chapter and Conference Paper
Control of the Depth of Anesthesia Using a New Model for the Action of Propofol and Remifentanil on the BIS Level
This paper presents a simple individualized open-loop control scheme for the automatic delivery of anesthetics in order to achieve and maintain a desired depth of anesthesia. This control scheme is based on a ...
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Chapter
Decision Support Indicators for Municipal Investment in Low-Density Territories: A Case Study in the Portuguese Historical Villages
The Portuguese Historical Villages (AHP) are unique due to their specific features, singular rural heritage, existing asymmetries, and the financial challenges faced by their municipalities and surrounding env...
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Chapter
Information Systems and Technologies as Promoters of the Low-Density Territories Sustainability
This chapter presents a technological solution adopted within the scope of a comprehensive project, PLowDeR – Framework for Analysis of the Economic and Social Impact of Tourist Activities in Low Density Terri...
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Chapter and Conference Paper
State-Space Estimation Using the Behavioral Approach: A Simple Particular Case
In this paper we apply the behavioral estimation theory developed in Ntogramatzidis et al. (2020) to the particular case of state-space systems. We derive new necessary and sufficient conditions for the solvab...
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Chapter
Assessing the Impact of Tourist Activities on Low-Density Territories: The Case of the Historical Villages of Portugal
The 12 historical villages of Portugal (HVP) present a set of distinctive characteristics—history, culture, and heritage—that enable the creation of a common identity. These villages, located in “low-density t...
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Article
Performance indicators for research and cultural creation activities in polytechnic higher education institutions: a consensus building approach
This article presents a set of performance indicators based on the Portuguese case for managing the performance of research and cultural creation activities and their impact on the regional context in polytech...
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Chapter
A Note on Controlled Invariance for Behavioral nD Systems
In this chapter we extend the notion of invariance of nD behaviors introduced in Pereira and Rocha (European Control Conference 2013, ECC’13. ETH Zurich, Switzerland, pp. 301–305, 2013) [4], Rocha and Wood (Int. ...
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Article
Periodic state-space representations of periodic convolutional codes
In this paper we study the representation of periodically time-varying convolutional codes by means of periodic input-state-output models. In particular, we focus on period two and investigate under which cond...
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Chapter and Conference Paper
MDP Periodically Time-Varying Convolutional Codes
In this paper we use some classical ideas from linear systems theory to analyse convolutional codes. In particular, we exploit input-state-output representations of periodic linear systems to study periodicall...
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Chapter and Conference Paper
A Simplified Control Approach for the Neuromuscular Blockade Level
In this paper a new simplified control scheme for the neuromuscular blockade level that only requires the knowledge of one model parameter is proposed. The control law is designed to track a desired target neu...
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Chapter and Conference Paper
A State Space Approach to Periodic Convolutional Codes
In this paper we study periodically time-varying convolutional codes by means of input-state-output representations. Using these representations we investigate under which conditions a given time-invariant con...
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Chapter
On the Connection Between the Stability of Multidimensional Positive Systems and the Stability of Switched Positive Systems
In this work, we study the connection of the stability of multidimensional positive systems with the stability of switched positive systems. In a previous work, we showed that the stability of a multidimension...
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Article
Special issue on multidimensional systems applications
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Article
A 2D Hopfield Neural Network approach to mechanical beam damage detection
The aim of this paper is to present a method based on a 2D Hopfield Neural Network for online damage detection in beams subjected to external forces. The underlying idea of the method is that a significant cha...
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Chapter and Conference Paper
Minimal State-Space Realizations of Convolutional Codes
In this work the minimality of state-space realizations of an input/output operator (encoder) and of the corresponding output behavior (code) are analyzed. Moreover, a procedure to obtain a minimal realization...
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Chapter and Conference Paper
Minimal Realizations of Syndrome Formers of a Special Class of 2D Codes
In this paper we consider a special class of 2D convolutional codes (composition codes) with encoders G(d 1, d 2) that can be decomposed as the product of two 1D encoders, i.e.,
