Search Results - "Polak, Adam G"

Processing Photoplethysmograms Recorded by Smartwatches to Improve the Quality of Derived Pulse Rate Variability by Polak, Adam G, Klich, Bartłomiej, Saganowski, Stanisław, Prucnal, Monika A, Kazienko, Przemysław

“…Cardiac monitoring based on wearable photoplethysmography (PPG) is widespread because of its usability and low cost. Unfortunately, PPG is negatively affected…”
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Single-channel EEG processing for sleep apnea detection and differentiation by Prucnal, Monika A, Polak, Adam G

“…Sleep apnea syndrome is a common sleep disorder. Detection of apnea and differentiation of its type: obstructive (OSA), central (CSA) or mixed is important in…”
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Comparison of multiband filtering, empirical mode decomposition and short-time fourier transform used to extract physiological components from long-term heart rate variability by Adamczyk, Krzysztof, Polak, Adam G.

“…Heart rate is constantly changing under the influence of many control signals, as manifested by heart rate variability (HRV). HRV is a nonstationary,…”
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Effect of Feature Extraction on Automatic Sleep Stage Classification by Artificial Neural Network by Prucnal, Monika, Polak, Adam G.

“…EEG signal-based sleep stage classification facilitates an initial diagnosis of sleep disorders. The aim of this study was to compare the efficiency of three…”
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Algebraic approximation of the distributed model for the pressure drop in the respiratory airways by Polak, Adam G.

“…The complexity of the human respiratory system causes that one of the main methods of analyzing the dynamic pulmonary phenomena and interpreting experimental…”
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Emotion Recognition for Everyday Life Using Physiological Signals From Wearables: A Systematic Literature Review by Saganowski, Stanislaw, Perz, Bartosz, Polak, Adam G., Kazienko, Przemyslaw

“…Smart wearables, equipped with sensors monitoring physiological parameters, are becoming an integral part of our life. In this work, we investigate the…”
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Quantitative Assessment of the Airway Response to Bronchial Tests Based on a Spirometric Curve Shift by Polak, Adam G., Obojski, Andrzej, Mroczka, Janusz

“…Objective: Although spirometry is the most common pulmonary function test, there is no method to quantitatively infer about airway resistance or other…”
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Estimation of Lung Properties From the Forced Expiration Data by Polak, Adam G., Wysoczanski, Dariusz, Mroczka, Janusz

“…Forced expiration is the most commonly applied lung function tests. Despite the problem of spirometry modeling was solved a few decades ago, a relatively small…”
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Effects of homogeneous and heterogeneous changes in the lung periphery on spirometry results by Polak, Adam G., Wysoczański, Dariusz, Mroczka, Janusz

“…•The paper presents a computational model for the respiratory system during spirometric manoeuvre used for a systematic study on the effects of peripheral…”
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Comparison of information on sleep apnoea contained in two symmetric EEG recordings by Prucnal, Monika A, Polak, Adam G

“…Electroencephalogram (EEG) is one of biomedical signals measured during all-night polysomnography to diagnose sleep disorders, including sleep apnoea. Usually…”
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Tomographic image reconstruction via estimation of sparse unidirectional gradients by Polak, Adam G, Mroczka, Janusz, Wysoczański, Dariusz

“…Abstract Since computed tomography (CT) was developed over 35 years ago, new mathematical ideas and computational algorithms have been continuingly elaborated…”
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Analysis of multiple linear regression algorithms used for respiratory mechanics monitoring during artificial ventilation by Polak, Adam G

“…Abstract Many patients undergo long-term artificial ventilation and their respiratory system mechanics should be monitored to detect changes in the patient's…”
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Analysis of the method for ventilation heterogeneity assessment using the Otis model and forced oscillations by Glapiński, Jarosław, Mroczka, Janusz, Polak, Adam G

“…Highlights • We analyse the method for bimodal lung ventilation heterogeneity identification. • Respiratory impedance measurement by forced oscillations in…”
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An Error-Minimizing Approach to Regularization in Indirect Measurements by Polak, A.G.

“…Indirect measurements often amount to the estimation of the parameters of a mathematical model that describes the object under investigation, and this process…”
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Preliminary study on the accuracy of respiratory input impedance measurement using the interrupter technique by Jabłoński, Ireneusz, Polak, Adam G, Mroczka, Janusz

“…Abstract Respiratory input impedance contains information about the state of pulmonary mechanics in the frequency domain. In this paper the possibility of…”
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A model-based method for flow limitation analysis in the heterogeneous human lung by Polak, Adam G

“…Abstract Flow limitation in the airways is a fundamental process constituting the maximal expiratory flow-volume curve. Its location is referred to as the…”
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Nonlinear model for mechanical ventilation of human lungs by Polak, Adam G., Mroczka, Janusz

“…A complex nonlinear model for mechanical ventilation, its computer implementation and validation are presented. The model includes the morphometry-based…”
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Computational model for forced expiration from asymmetric normal lungs by Polak, Adam G, Lutchen, Kenneth R

“…We present a computational model to predict maximal expiration through a morphometry-based asymmetrical bronchial tree. A computational model with the…”
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Derivation of Frequency Components from Overnight Heart Rate Variability Using an Adaptive Variational Mode Decomposition by Adamczyk, Krzysztof, Polak, Adam G.

“…Heart rate variability (HRV) is a non-stationary, irregularly sampled signal that represents changes in heart rate over time. The HRV spectrum can be divided…”
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Analysis of Features Extracted from EEG Epochs by Discrete Wavelet Decomposition and Hilbert Transform for Sleep Apnea Detection by Prucnal, Monika A., Polak, Adam G.

“…Sleep apnea (SA) is one of the most common disorders manifesting during sleep and the electroencephalo-gram (EEG) belongs to these biomedical signals that…”
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