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Assessing time series correlation significance: A parametric approach with application to physiological signals.
Biomed Signal Process Control
August 2024
CNRS-University of Montpellier LIRMM, UMR5506, Interactive Digital Human, Montpellier, France.
Correlation coefficients play a pivotal role in quantifying linear relationships between random variables. Yet, their application to time series data is very challenging due to temporal dependencies. This paper introduces a novel approach to estimate the statistical significance of correlation coefficients in time series data, addressing the limitations of traditional methods based on the concept of effective degrees of freedom (or effective sample size, ESS).
View Article and Find Full Text PDFStokes flows in a two-dimensional bifurcation.
R Soc Open Sci
January 2025
Mathematical Institute, University of Oxford, Oxford, UK.
The flow network model is an established approach to approximate pressure-flow relationships in a bifurcating network, and has been widely used in many contexts. Existing models typically assume unidirectional flow and exploit Poiseuille's law, and thus neglect the impact of bifurcation geometry and finite-sized objects on the flow. We determine the impact of bifurcation geometry and objects by computing Stokes flows in a two-dimensional (2D) bifurcation using the Lightning-AAA Rational Stokes algorithm, a novel mesh-free algorithm for solving 2D Stokes flow problems utilizing an applied complex analysis approach based on rational approximation of the Goursat functions.
View Article and Find Full Text PDFInfluences of the second motion probing gradient -value and T2 relaxation time on magnetic resonance diffusion-derived 'vessel density' (DDVD) calculation: the examples of liver, spleen, and liver simple cyst.
Quant Imaging Med Surg
January 2025
Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China.
Background: Magnetic resonance (MR) diffusion-derived 'vessel density' (DDVD) is calculated according to: DDVD = Sb0/ROI - S/ROI, where S and S refer to the tissue signal when -value is 0 or 2 s/mm. S and ROI can also be approximated by other low -values diffusion-weighted imaging (DWI). This study investigates the influence of the second motion probing gradient -value and T2 on DDVD calculations of the liver, spleen, and liver simple cyst.
View Article and Find Full Text PDFResource-Rational Virtual Bargaining for Moral Judgment: Toward a Probabilistic Cognitive Model.
Top Cogn Sci
January 2025
Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology.
Recent theoretical work has argued that moral psychology can be understood through the lens of "resource rational contractualism." The view posits that the best way of making a decision that affects other people is to get everyone together to negotiate under idealized conditions. The outcome of that negotiation is an arrangement (or "contract") that would lead to mutual benefit.
View Article and Find Full Text PDFEffectiveness of Various Sternal Closure Devices Post Adult Cardiac Surgery.
Heart Lung Circ
January 2025
Department of Cardiothoracic Surgery, Royal Melbourne Hospital, Melbourne, Vic, Australia.
Background & Aim: Sternotomy remains a commonly used technique to access the heart for cardiac surgery worldwide. To date, there is no clear consensus on the single superior sternal closure technique. Patient-specific factors such as osteoporosis, diabetes, old age, body habitus influence a surgeon's choice in this matter as do techniques commonly used during the training period and used in the current workplace.
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