Browsing NTNU Open by Author "Toften, Ståle"
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A pilot study of scoring individual sleep apnea events using non-contact radar technology, pulse oximetry and machine learning (Somnofy®)
Toften, Ståle; Kjellstadli, Jonas Tøgersen; Tyvold, Stig Sverre; Moxness, Mads Henrik Strand (Peer reviewed; Journal article, 2021)The gold standard for assessing sleep apnea, polysomnography, is resource intensive and inconvenient. Thus, several simpler alternatives have been proposed. However, validations of these alternatives have focused primarily ... -
Validation of sleep stage classification using non-contact radar technology and machine learning (Somnofy®)
Toften, Ståle; Pallesen, Ståle; Hrozanova, Maria; Moen, Frode; Grønli, Janne (Peer reviewed; Journal article, 2020)Objective: To validate automatic sleep stage classification using deep neural networks on sleep assessed by radar technology in the commercially available sleep assistant Somnofy® against polysomnography (PSG). Methods: ... -
Waves Propagating on Fluids with Piecewise Constant Vorticity
Toften, Ståle (Master thesis, 2015)The purpose of this study was to find the dispersion relation for waves on an arbitrary current velocity profile approximated by N linear layers. Using a Stokes expansion to first order in the steepness parameter ka the ...