115 documents found, page 1 of 12
Predictive Maintenance Using Autoencoders and Messaging Systems
Carvalho, Rui; Sousa, Diogo; Leal, FátimaThis article presents an anomaly detection system for bearing data, leveraging Apache Kafka for efficient data streaming and an LSTM autoencoder. The system relies on a data producer that reads bearing vibration data, computes the Root Mean Square values, and streams both raw and processed data to a Kafka topic. The consumer processes this data, storing the raw values in a PostgreSQL database, and performs anom...
Medical Treatment of Osteomyelitis due to Carbapenemase-Producing Klebsiella pn...
Barbosa, Renata; Garrido, Susana; Costa, Luís; Carvalho, RuiN/A; N/A
From Day-Ahead to a 6-Hour Period-Ahead Market Adapted to the Stochastic Behavi...
Couto, António; Algarvio, Hugo; Lopes, Fernando; Estanqueiro, Ana; Santos, Gabriel; Lezama, Fernando; Faia, Ricardo; Carvalho, Rui; Vale, ZitaABSTRACT: The existing electricity market design challenges the fair and competitive participation of variable renewable energy sources (vRES) due to their weather dependence and limited forecasting accuracy, especially for long-time horizons, as required in the day-ahead market (DAM). These challenges impact market clearing prices and create imbalances, leading to inefficiencies, such as market-splitting event...
The Role of Demand and Vres Flexibility in Carbon-Neutral Power Systems: Insigh...
Algarvio, Hugo; Couto, António; Lopes, Fernando; Estanqueiro, Ana; Faia, Ricardo; Santos, Gabriel; Carvalho, Rui; Faria, Pedro; Vale, ZitaABSTRACT: The goal of a carbon-neutral society by 2050 is speeding up the integration of variable renewable energy sources (vRES) in European power systems. For the expected levels of vRES, the adaptation of the demand will be crucial to manage the stochastic behaviour of these technologies. This work evaluates the impact of four prospective 2050 energy mix scenarios in the Iberian electricity market. All scena...
A contribution of shortest paths algorithms to the networkX python library
Cruz, António Miguel; Carvalho, Rui; Costa, André; Pinto, Luís; Dias, Luís; Cerqueira, Paulino; Machado, Rodrigo; Batista, Tiago; Castro, PedroNetworkX is a free Python library for graphs and networks and is used in many applications and projects to find the shortest path in path planning scenarios. For dense graphs, the library provides the Floyd–Warshall algorithm for shortest paths and the A* (“A-Star”) algorithm for shortest paths and path lengths. However, several extensions have been proposed to improve the A*, but they are not included in the l...
The role of sheltered habitats in biodiversity conservation of species sensitiv...
Baptista, Martim; Carvalho, Rui; Boieiro, Mário; Bartz, M. L. C.; Mendes, Sara; Timóteo, Sérgio; Azevedo-Pereira, Henrique M.V.S.; Alves, JoanaIn the aftermath of 2019’ tropical cyclones Idai and Kenneth, we assessed ground beetle communities of the Gorongosa National Park (GNP) in Mozambique. The influence of habitat shelters, namely the buffering role of closed microhabitat conditions on Alpha diversity and community trait values during a long period of drought, was evaluated across the main habitat types of the park: miombo forests, mixed forests, ...
Reduction of the Market Splitting Occurrences: A Dynamic Line Rating Approach f...
Algarvio, Hugo; Couto, António; Estanqueiro, Ana; Carvalho, Rui; Santos, Gabriel; Faia, Ricardo; Faria, Pedro; Vale, ZitaABSTRACT: Typically, Transmission System Operators apply power flow models with Seasonal Line Rating prescriptions to compute the ampacity of power lines, in a process that enables to obtain the cross-border capacity for trading between different countries or market zones. These seasonal-dependent models rely on fixed conservative meteorological conditions throughout the year, underestimating the real-time tran...
The role of sheltered habitats in biodiversity conservation of species sensitiv...
Baptista, Martim; Carvalho, Rui; Boieiro, Mário; Bartz, Marie L. C.; Mendes, Sara; Timóteo, Sérgio; Azevedo-Pereira, Henrique M. V. S.; Alves, JoanaIn the aftermath of 2019’ tropical cyclones Idai and Kenneth, we assessed ground beetle communities of the Gorongosa National Park (GNP) in Mozambique. The influence of habitat shelters, namely the buffering role of closed microhabitat conditions on Alpha diversity and community trait values during a long period of drought, was evaluated across the main habitat types of the park: miombo forests, mixed forests, ...
Gastrite Enfisematosa: Imagens de um Raro Foco Séptico
Trovão Bastos, Martim; Barbosa, Fábio; Carvalho, Rui; Soares Dionísio, Antony.
Listeriosis: The Experience of a Portuguese Hospital Centre : Listeriose: A Exp...
Costa, Andreia; Carvalho, Rui; Paixão, Anusca; Sousa, Sara; Jesus, Rafael; Guimarães, FernandoIntroduction: Listeria spp. infection is rare. It usually results from the consumption of contaminated food. Although most cases are sporadic, outbreaks of food origin have been reported. The spectrum of clinical manifestations is diverse, particularly bacteriemia, sepsis, and central nervous system (CNS) infection. It mainly affects elderly patients with important comorbidities or immunosuppression states, and...