13 documents found, page 1 of 2
O impacto da inclusão digital na saúde mental e física dos séniores : o caso da...
Vaz, Cátia; Costa, Flávia; Carvalho, Helena M.; Ribeiro, Joana; Baptista, Ricardo; Silvestre, Carlos; Lopes, Carla; Kosmider, Anna; Moura, JoséIntervenção Social. ISSN 0874-1611. N. 62 (2023).; Este artigo apresenta uma pesquisa sobre a inclusão digital dos idosos como forma de promover a saúde mental e física utilizando a plataforma Sioslife como estudo de caso. A pesquisa foi conduzida com uma amostra de 546 séniores pertencentes a um Município da Região Norte de Portugal. O objetivo deste estudo foi avaliar o impacto da utilização da plataforma na ...
A general discrete-time method to achieve resilience in consensus algorithms
Ramos, Guilherme; Silvestre, Daniel; Silvestre, CarlosIn this paper, we approach the problem of a set of network agents reaching resilient consensus in the presence of a subset of attacked nodes. We devise a generalized method, with polynomial time complexity, which receives as input a discrete-time, synchronous-communication consensus algorithm, a dynamic network of agents, and the maximum number of attacked nodes. The distributed algorithm enables each normal no...
Presentation of "Analysis for Linear Systems based on Reachability Sets"
Silvestre, Daniel; Rosa, Paulo; Hespanha, João; Silvestre, CarlosThe problem of deciding which inputs in a model influence the most the state or output is often of practical importance, especially in the cases in which the system can be over-parameterized. In this context, a designer is required to perform sensitivity analyses so as to select which inputs are the most relevant to the problem at hand and remove those with smaller or no impact. In this paper, we tackle this is...
Presentation of "Desynchronization for Decentralized Medium Access Control base...
Silvestre, Daniel; Hespanha, João; Silvestre, CarlosDesynchronization for Decentralized Medium Access Control based on Gauss-Seidel Iterations
Desynchronization for Decentralized Medium Access Control based on Gauss-Seidel...
Silvestre, Daniel; Hespanha, João; Silvestre, CarlosWe address the Desynchronization problem of achieving an equally spaced transmission schedule in a cooperative fashion. This problem arises in a shared medium communication and is of importance to achieve a fair multiple access schedule at the Medium Access Control (MAC) layer in the context of Wireless Sensor Networks (WSNs). In this paper, we investigate the convergence rate of different optimization algorith...
Presentation of "Sensitivity Analysis for Linear Systems based on Reachability ...
Silvestre, Daniel; Hespanha, João; Silvestre, CarlosPresentation at Conference on Decision and Control 2019.
A Microscopic-view Infection Model based on Linear Systems
Hao, He; Silvestre, Daniel; Silvestre, CarlosUnderstanding the behavior of an infection network is typically addressed from either a microscopic or a macroscopic point-of-view. The trade-off is between following the individual states at some added complexity cost or looking at the ratio of infected nodes. In this paper, we focus on developing an alternative approach based on dynamical linear systems that combines the fine information of the microscopic vi...
Sensitivity Analysis for Linear Systems based on Reachability Sets
Silvestre, Daniel; Rosa, Paulo; Hespanha, Joao; Silvestre, CarlosThe problem of deciding which inputs in a model influence the most the state or output is often of practical importance, especially in the cases in which the system can be over-parameterized. In this context, a designer is required to perform sensitivity analyses so as to select which inputs are the most relevant to the problem at hand and remove those with smaller or no impact. In this paper, we tackle this is...
Fault Detection for Cyber-Physical Systems: Smart Grid case
Silvestre, Daniel; Hespanha, João; Silvestre, CarlosThe problem of fault detection and isolation in cyber-physical systems is growing in importance following the trend to have an ubiquitous presence of sensors and actuators with network capabilities in power networks and other areas. In this context, attacks to power systems or other vital components providing basic needs might either present a serious threat or at least cost a lot of resources. In this paper, w...
Source Localization and Network Topology Discovery in Infection Networks
Hao, He; Silvestre, Daniel; Silvestre, CarlosNetwork Topology - The links or connections among the various components in a network. Current research trends relating to this problem include source localization and structure discovery. Source Localization - A general Susceptible-Infected (SI) Model used to solve the source localization problem. Current research trends relating to this problem include source localization and structure discovery