Nonlinear Dynamics of Heart Rate Variability after Acutely Induced Myocardial Ischemia by Percutaneous Transluminal Coronary Angioplasty [PDF]
Entropy, 2023 Several heart rate variability (HRV) characteristics of patients with myocardial ischemia are associated with a higher mortality risk. However, the immediate effect of acute ischemia on the HRV nonlinear dynamical behavior is unknown.
Martín Calderón-Juárez +3 more
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The Search for Atmospheric Laminar Channels: Experimental Results and Method Dissemination [PDF]
Sensors, 2021 In this paper, a practical application of theoretical developments found in our previous works is explored in relation to atmospheric lidar data. Multifractal structures, previously named “laminar channels”, have been identified in atmospheric profiles ...
Iulian-Alin Roșu +7 more
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Recurrence Quantification Analysis of Ankle Kinematics During Gait in Individuals With Chronic Ankle Instability [PDF]
Frontiers in Sports and Active Living, 2022 PurposeAn investigation of the ankle dynamics in a motor task may generate insights into the etiology of chronic ankle instability (CAI). This study presents a novel application of recurrence quantification analysis (RQA) to examine the ankle dynamics ...
Sheng-Che Yen +6 more
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Wing bone laminarity in Pterosaurs: insights into torsional adaptations for flight evolution [PDF]
Anais Da Academia Brasileira De CienciasPowered flight has evolved separately in three tetrapod clades: pterosaurs, birds (avian dinosaurs), and bats. To meet the challenges of powered flight, tetrapods acquired structural, mechanical, and physiological adaptations.
Alexander Kellner +2 more
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Dynamic Response of Heart Rate Variability to Active Standing in Aortic Valve Disease: Insights from Recurrence Quantification Analysis [PDF]
SensorsIntroduction: Aortic valve disease (AVD) is an inflammatory, lipid infiltration and calcification disease that has been associated with changes in the conventional linear heart rate variability (HRV) indices showing a marked shift towards sympathetic ...
Itayetzin Beurini Cruz-Vega +5 more
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Natural language processing in at-risk mental states: enhancing the assessment of thought disorders and psychotic traits with semantic dynamics and graph theory [PDF]
Brazilian Journal of PsychiatryObjective: Verbal communication contains key information for mental health assessment. Researchers have linked psychopathology phenomena to certain counterparts in natural language processing.
Felipe Argolo +13 more
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Development of limb bone laminarity in the homing pigeon (Columba livia) [PDF]
PeerJ, 2020 Background Birds show adaptations in limb bone shape that are associated with resisting locomotor loads. Whether comparable adaptations occur in the microstructure of avian cortical bone is less clear.
Rylee S. McGuire +3 more
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One-dimensional flame instability and control of burning in fire-chamber
Trudy Odesskogo Politehničeskogo Universiteta, 2015 The flame stability with regard to one-dimensional exponential perturbations both for the combustion in the fire-chamber and the flame propagating in closed tubes or chambers is investigated.
Victor E. Volkov
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Mathematical simulation of laminar-turbulent transition and the turbulence scale estimation
Trudy Odesskogo Politehničeskogo Universiteta, 2014 The laminar-turbulent transition, analyzed in this work represents a particular interest for various branches of science and engineering. From the practical point of view, the turbulence scale represents one of the most important problems.
Віктор Едуардович Волков
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Mathematics, 2022 In the present paper, correlations between multifractality and stochasticity in atmospheric dynamics are investigated. Starting with two descriptions of atmospheric scenarios, one based on scale relativity theory and another based on stochastic theory ...
Dragos-Constantin Nica +7 more
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