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http://dx.doi.org/10.1016/j.amjcard.2024.08.012 | DOI Listing |
IEEE Trans Audio Speech Lang Process (2025)
April 2025
Department of Electronic Engineering and with the Advanced Center for Electrical and Electronic Engineering, Universidad Técnica Federico Santa María, Valparaíso, Chile.
This study presents a novel application of a Probabilistic Bayesian Neural Network (PBNN) for estimating vocal function variables and enhancing non-invasive ambulatory voice monitoring by addressing aleatoric and epistemic uncertainties in regression tasks. The proposed PBNN allows for estimating key physiological parameters including subglottal pressure, vocal fold contact pressure, thyroarytenoid, and cricothyroid muscle activations, from seven aerodynamic and acoustic features. The PBNN is trained on the Triangular Body-Cover Model (TBCM) of the vocal folds to produce a non-linear inverse mapping between its inputs and outputs.
View Article and Find Full Text PDFACS Omega
August 2025
Faculty of Engineering, School of Natural Resources and Environmental Engineering, Universidad del Valle, 13th Street, 100-00, Cali 760032, Colombia.
The manual manometric (MM) method is widely used in batch anaerobic digestion tests, such as the biochemical methane potential (BMP) and the specific methanogenic activity (SMA), but it can cause inaccuracies due to biogas loss during measurements. This study presents an IoT-based biogas pressure measurement device developed with an Arduino microcontroller to improve accuracy and reliability in batch tests. The device supports four reactors and was tested in 250 mL glass vessels with varying headspace (20 and 50%) and substrate/inoculum ratios (0.
View Article and Find Full Text PDFHeart Lung Circ
August 2025
Department of Clinical Medicine, Aarhus University, Aarhus, Denmark; Department of Anaesthesiology and Intensive Care, Aarhus University Hospital, Aarhus, Denmark. Electronic address: https://x.com/MadsDam_MD.
Background: Cardiac output (CO) measurement is crucial in cardiovascular research. Pressure-volume (PV) loop recordings provide detailed information on cardiac function, including CO. This study aimed to compare CO measurements obtained from biventricular PV loop recordings with thermodilution (TD) as a reference method in pigs.
View Article and Find Full Text PDFPNAS Nexus
August 2025
Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, United Kingdom.
High blood pressure (hypertension) is the number one risk factor for premature death. Hypertension is asymptomatic, so blood pressure must be regularly monitored to diagnose it. In auscultatory blood pressure measurement, a patient's systolic (maximum) and diastolic (minimum) blood pressure are inferred from the pressure in an inflatable cuff wrapped around the arm.
View Article and Find Full Text PDFAm J Physiol Regul Integr Comp Physiol
September 2025
Institute for Energy and Environmental System, Sustainable Energy and Environmental Society Open Innovation Research Organization, Waseda University, Shinjuku-ku, Japan.
The cerebral vascular resistance index (CVRi), a single-parameter model based on systemic blood pressure rather than cerebral perfusion pressure (CPP), is widely used to assess cerebrovascular resistance. However, it does not accurately reflect the pressure-flow/velocity relationships in the cerebral circulation, as cerebral blood flow (CBF) is primarily regulated by CPP. This study evaluated the validity of CVRi during orthostatic stress induced by head-up tilt (HUT), which alters CPP independently of arterial blood pressure at the heart level and CBF.
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