82 results match your criteria: "INESC TEC - Institute for Systems and Computer Engineering[Affiliation]"

AI-based models to predict decompensation on traumatic brain injury patients.

Comput Biol Med

January 2025

INESC TEC - Institute for Systems and Computer Engineering, Technology and Science, Porto, Portugal; FCTUC - Faculty of Sciences and Technology of the University of Coimbra, Coimbra, Portugal. Electronic address:

Traumatic Brain Injury (TBI) is a form of brain injury caused by external forces, resulting in temporary or permanent impairment of brain function. Despite advancements in healthcare, TBI mortality rates can reach 30%-40% in severe cases. This study aims to assist clinical decision-making and enhance patient care for TBI-related complications by employing Artificial Intelligence (AI) methods and data-driven approaches to predict decompensation.

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: Cancer patients undergoing chemotherapy often face challenges that reduce their physical function and quality of life. Technological resources offer innovative solutions for physical rehabilitation, but the extent of their application in this context remains unclear. This scoping review aims to explore and map the various technological tools used to support physical rehabilitation in cancer patients during chemotherapy, focusing on their potential to improve outcomes and enhance patient care.

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Aligning priorities: A Comparative analysis of scientific and policy perspectives on municipal solid waste management.

Waste Manag

December 2024

Department of Industrial Engineering and Management, Faculty of Engineering of University of Porto, R. Roberto Frias, 4200-465, Porto, Portugal; INESC TEC - Institute for Systems and Computer Engineering, Technology and Science, R. Roberto Frias, 4200-465, Porto, Portugal.

Article Synopsis
  • Municipal solid waste (MSW) management presents significant economic, environmental, and social challenges that need comprehensive research and effective policies for sustainable solutions.
  • * This study uses two Latent Dirichlet Allocation (LDA) models to analyze themes in scientific literature and EU-funded projects, finding that both realms show alignment in addressing key MSW issues.
  • * The analysis reveals a need for more research on specific topics like leaching and heavy metal extraction, while suggesting that future EU research should also prioritize waste prevention over just management.*
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: Obstructive sleep apnea (OSA) classification relies on polysomnography (PSG) results. Current guidelines recommend the development of clinical prediction algorithms in screening prior to PSG. A recent intuitive and user-friendly tool (OSABayes), based on a Bayesian network model using six clinical variables, has been proposed to quantify the probability of OSA.

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One-class classification with confound control for cognitive screening in older adults using gait, fingertapping, cognitive, and dual tasks.

Comput Methods Programs Biomed

February 2025

Faculty of Engineering, University of Porto, 4200-465, Porto, Portugal; INESC TEC (Institute for Systems and Computer Engineering, Technology and Science), 4200-465, Porto, Portugal. Electronic address:

Background And Objectives: Early detection of cognitive impairment is crucial for timely clinical interventions aimed at delaying progression to dementia. However, existing screening tools are not ideal for wide population screening. This study explores the potential of combining machine learning, specifically, one-class classification, with simpler and quicker motor-cognitive tasks to improve the early detection of cognitive impairment.

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This paper presents a new type of phase-shifted Fiber Bragg Grating (FBG): the sliced-FBG (SFBG). The fabrication process involves cutting a standard FBG inside its grating region. As a result, the last grating pitch is shorter than the others.

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Article Synopsis
  • Obstructive sleep apnea (OSA) is a diverse sleep disorder, and researchers have previously analyzed its different phenotypes using various clustering methods.
  • This study tested four clustering techniques (Agglomerative Hierarchical Clustering, K-means, Fuzzy C-means, and Gaussian Mixture Model) on 865 patients to see how method selection influences the classification of OSA clusters and their physiological differences.
  • Results showed that two clusters were consistently distinct across all methods, while three had overlapping features; K-means performed best overall, and Fuzzy C-means excelled in managing overlapping clusters, underscoring the significance of clustering method choice in OSA phenotyping.
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A survey on cell nuclei instance segmentation and classification: Leveraging context and attention.

Med Image Anal

January 2025

INESC TEC - Institute for Systems and Computer Engineering, Technology and Science, R. Dr. Roberto Frias, Porto, 4200-465, Portugal; University of Porto - Faculty of Engineering, R. Dr. Roberto Frias, Porto, 4200-465, Portugal.

Nuclear-derived morphological features and biomarkers provide relevant insights regarding the tumour microenvironment, while also allowing diagnosis and prognosis in specific cancer types. However, manually annotating nuclei from the gigapixel Haematoxylin and Eosin (H&E)-stained Whole Slide Images (WSIs) is a laborious and costly task, meaning automated algorithms for cell nuclei instance segmentation and classification could alleviate the workload of pathologists and clinical researchers and at the same time facilitate the automatic extraction of clinically interpretable features for artificial intelligence (AI) tools. But due to high intra- and inter-class variability of nuclei morphological and chromatic features, as well as H&E-stains susceptibility to artefacts, state-of-the-art algorithms cannot correctly detect and classify instances with the necessary performance.

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Are Aptamer-Based Biosensors the Future of the Detection of the Human Gut Microbiome?-A Systematic Review and Meta-Analysis.

Biosensors (Basel)

September 2024

INESC TEC-Institute for Systems and Computer Engineering, Technology and Science, University of Porto, 4169-007 Porto, Portugal.

The gut microbiome is shaped early in life by dietary and lifestyle factors. Specific compounds in the gut affect the growth of different bacterial species and the production of beneficial or harmful byproducts. Dysbiosis of the gut microbiome has been linked to various diseases resulting from the presence of harmful bacteria and their byproducts.

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Calibration and Modeling of the Semmes-Weinstein Monofilament for Diabetic Foot Management.

Bioengineering (Basel)

August 2024

CIDEM, ISEP, Polytechnic of Porto, 4249-015 Porto, Portugal.

Diabetic foot is a serious complication that poses significant risks for diabetic patients. The resulting reduction in protective sensitivity in the plantar region requires early detection to prevent ulceration and ultimately amputation. The primary method employed for evaluating this sensitivity loss is the 10 gf Semmes-Weinstein monofilament test, commonly used as a first-line procedure.

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Plasmonic nanoparticle sensors: current progress, challenges, and future prospects.

Nanoscale Horiz

November 2024

CINBIO, Department of Physical Chemistry, Universidade de Vigo, 36310 Vigo, Spain.

Plasmonic nanoparticles (NPs) have played a significant role in the evolution of modern nanoscience and nanotechnology in terms of colloidal synthesis, general understanding of nanocrystal growth mechanisms, and their impact in a wide range of applications. They exhibit strong visible colors due to localized surface plasmon resonance (LSPR) that depends on their size, shape, composition, and the surrounding dielectric environment. Under resonant excitation, the LSPR of plasmonic NPs leads to a strong field enhancement near their surfaces and thus enhances various light-matter interactions.

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Research priorities in veterinary palliative care.

Vet J

August 2024

School of Medicine and Biomedical Sciences, University of Porto (ICBAS-UP), Rua de Jorge Viterbo Ferreira, 228, Porto 4050-313, Portugal; Associate Laboratory i4HB, Institute for Health and Bioeconomy, University Institute of Health Sciences, CESPU, Gandra 4585-116, Portugal; UCIBIO, Applied Molecular Biosciences Unit, Translational Toxicology Research Laboratory, University Institute of Health Sciences (1H-TOXRUN, IUCS-CESPU), Gandra 4585-116, Portugal.

Veterinary palliative care consists of end-of-life care of companion animals suffering from terminal or life-limiting diseases. Despite the growing need for veterinary palliative care, little research has been conducted on this topic. This perspective intends to provide an overview of the existing concerns and identify knowledge gaps to motivate further research.

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Artificial intelligence (AI) models have received considerable attention in recent years for their ability to identify optical coherence tomography (OCT) biomarkers with clinical diagnostic potential and predict disease progression. This study aims to externally validate a deep learning (DL) algorithm by comparing its segmentation of retinal layers and fluid with a gold-standard method for manually adjusting the automatic segmentation of the Heidelberg Spectralis HRA + OCT software Version 6.16.

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The human brain, with its vast network of billions of neurons and trillions of synapses (connections) between diverse cell types, remains one of the greatest mysteries in science and medicine. Despite extensive research, an understanding of the underlying mechanisms that drive normal behaviors and response to disease states is still limited. Advancement in the Neuroscience field and development of therapeutics for related pathologies requires innovative technologies that can provide a dynamic and systematic understanding of the interactions between neurons and neural circuits.

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Enhancing the reproducibility and comprehension of adaptive immune receptor repertoire sequencing (AIRR-seq) data analysis is critical for scientific progress. This study presents guidelines for reproducible AIRR-seq data analysis, and a collection of ready-to-use pipelines with comprehensive documentation. To this end, ten common pipelines were implemented using ViaFoundry, a user-friendly interface for pipeline management and automation.

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An optical fiber pH sensor based on a long-period fiber grating (LPFG) is reported. Two oppositely charged polymers, polyethylenimine (PEI) and polyacrylic acid (PAA), were alternately deposited on the sensing structure through a layer-by-layer (LbL) electrostatic self-assembly technique. Since the polymers are pH sensitive, their refractive index (RI) varies when the pH of the solution changes due to swelling/deswelling phenomena.

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Introduction: Precision monitoring maturity in climacteric fruits like tomato is crucial for minimising losses within the food supply chain and enhancing pre- and post-harvest production and utilisation.

Objectives: This paper introduces an approach to analyse the precision maturation of tomato using hyperspectral tomography-like.

Methods: A novel bi-directional spectral reconstruction method is presented, leveraging visible to near-infrared (Vis-NIR) information gathered from tomato spectra and their internal tissues (skin, pulp, and seeds).

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This paper presents an approach to enhancing sensitivity in optical sensors by integrating self-image theory and graphene oxide coating. The sensor is specifically engineered to quantitatively assess glucose concentrations in aqueous solutions that simulate the spectrum of glucose levels typically encountered in human saliva. Prior to sensor fabrication, the theoretical self-image points were rigorously validated using Multiphysics COMSOL 6.

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Spectral point-of-care technology is reagentless with minimal sampling (<10 μL) and can be performed in real-time. White blood cells are non-dominant in blood and in spectral information, suffering significant interferences from dominant constituents such as red blood cells, hemoglobin and billirubin. White blood cells of a bigger size can account for 0.

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Aims: Investigate whether a Home-based Exercise Therapy (HBET) program for patients with Peripheral Arterial Disease (PAD) and Intermittent Claudication (IC) with a behavior change intervention, supported by a smartphone application, is effective in improving walking distances and performance, and quality of life (QoL) over 6 months.

Methods And Results: This was a single-center, prospective, two-arm, single-blinded randomized controlled trial including 73 patients with PAD and IC, and three assessment moments: baseline, 3, and 6 months. Participants were randomized to receive a walking exercise prescription, with the support ( = 38) or without the support ( = 35) of the WalkingPad app, between January 2021 and July 2022.

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Mortality prediction using medical time series on TBI patients.

Comput Methods Programs Biomed

December 2023

INESC TEC - Institute for Systems and Computer Engineering, Technology and Science, Porto, Portugal; FEUP - Faculty of Engineering, University of Porto, Porto, Portugal. Electronic address:

Background And Objective: Traumatic Brain Injury (TBI) is one of the leading causes of injury-related mortality in the world, with severe cases reaching mortality rates of 30-40%. It is highly heterogeneous both in causes and consequences making more complex the medical interpretation and prognosis. Gathering clinical, demographic, and laboratory data to perform a prognosis requires time and skill in several clinical specialties.

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SHIP: identifying antimicrobial resistance gene transfer between plasmids.

Bioinformatics

October 2023

Delft Bioinformatics Lab, Delft University of Technology, Van Mourik Broekmanweg 6, Delft 2628 XE, The Netherlands.

Motivation: Plasmids are carriers for antimicrobial resistance (AMR) genes and can exchange genetic material with other structures, contributing to the spread of AMR. There is no reliable approach to identify the transfer of AMR genes across plasmids. This is mainly due to the absence of a method to assess the phylogenetic distance of plasmids, as they show large DNA sequence variability.

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Training motor imagery (MI) and motor observation (MO) tasks is being intensively exploited to promote brain plasticity in the context of post-stroke rehabilitation strategies. This may benefit from the use of closed-loop neurofeedback, embedded in brain-computer interfaces (BCI's) to provide an alternative non-muscular channel, which may be further augmented through embodied feedback delivered through virtual reality (VR). Here, we used functional magnetic resonance imaging (fMRI) in a group of healthy adults to map brain activation elicited by an ecologically-valid task based on a VR-BCI paradigm called NeuRow, whereby participants perform MI of rowing with the left or right arm (i.

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Imprinted Hydrogel Nanoparticles for Protein Biosensing: A Review.

ACS Sens

August 2023

CIQUP/IMS, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre 687, s/n, Porto 4169-007, Portugal.

Over the past decade, molecular imprinting (MI) technology has made tremendous progress, and the advancements in nanotechnology have been the major driving force behind the improvement of MI technology. The preparation of nanoscale imprinted materials, i.e.

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Accurate localization is a critical task in underwater navigation. Typical localization methods use a set of acoustic sensors and beacons to estimate relative position, whose geometric configuration has a significant impact on the localization accuracy. Although there is much effort in the literature to define optimal 2D or 3D sensor placement, the optimal sensor placement in irregular and constrained 3D surfaces, such as autonomous underwater vehicles (AUVs) or other structures, is not exploited for improving localization.

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