Kim Dremstrup

Ramboll (Denmark)

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Dario Farina

Imperial College London

Imran Khan Niazi

Aurora St. Luke's Medical Center

Asbjørn Mohr Drewes

Aalborg University

Mads Jochumsen

Aalborg University

Natalie Mrachacz‐Kersting

University of Freiburg

Ning Jiang

Sichuan University

M. J. Taylor

Utah State University

Michael Negale

Utah State University Space Dynamics Laboratory

Pierre‐Dominique Pautet

Utah State University

Lars Arendt‐Nielsen

Aalborg University

Cooperative Institutions

Aalborg University

121

Aalborg University Hospital

Aarhus University

University of Copenhagen

University of Colorado Boulder

Aarhus University Hospital

Technical University of Denmark

Laboratory for Atmospheric and Space Physics

United States Naval Research Laboratory

Goddard Space Flight Center

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High-fidelity numerical wave tank verification & validation study: Wave generation through paddle motion

CRC Press eBooks (2024)

Thanh Toan Tran Bart Meuris Chris Chartrand Josh Davidson Jacob Andersen

This paper presents a numerical benchmark study of wave propagation due to a paddle motion using different high-fidelity numerical models, which are capable of replicating the nearly actual physical wave tank testing. A full time series of the measured wave generation paddle motion that was used to generate wave propagation in the physical wave tank will be utilized in each of the models contributed by the participants of International Energy Agency Ocean Energy Systems Task 10, which includes both computational fluid dynamics and smoothed particle hydrodynamics models. The high-fidelity simulations of the physical wave testcase will allow for the evaluation of the initial transient effects from wave ramp-up and its evolution in the wave tank over time for two representative regular waves with varying levels of nonlinearity. Metrics like the predicted wave surface elevation at select wave probes, wave period, and phase-shift in time will be assessed to evaluate the relative accuracy of numerical models versus experimental data within specified time intervals. These models will serve as a guide for modelers in the wave energy community and provide a base case to allow further and more detailed numerical modeling of the fixed Kramer Sphere Cases under wave excitation force wave tank testing.

Wave tank

Wave model

Wave height

10.1201/9781003558859-26

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High-Latitude Gravity Wave Measurements in Noctilucent Clouds and Polar Mesospheric Clouds

Springer eBooks (2011)

M. J. Taylor Pierre‐Dominique Pautet Yucheng Zhao C. E. Randall J. D. Lumpe

Mesopause

10.1007/978-94-007-0326-1_7

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Citations (38)

Annual Meeting of the Society for Neuroscience, Neuroscience 2014, 15-19 November 2014, Washington, DC, USA

Annual Meeting of the Society for Neuroscience (2014)

Natalie Mrachacz‐Kersting Jiang Ning Kim Dremstrup Daniele Farina

Neuroinformatics

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Automatic slow wave sleep deprivation by detection of micro-sleep patterns

Kim Dremstrup C. Rasmussen T Arima Peter Svensson P. Rössel

Sleep

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Frontiers in Neuroengineering (2014)

Ren Xu Ning Jiang Aleksandra Vučković Muhammad Abul Hasan Natalie Mrachacz‐Kersting

Non-invasive EEG-based Brain-Computer Interfaces (BCI) can be promising for the motor neuro-rehabilitation of paraplegic patients. However, this shall require detailed knowledge of the abnormalities in the EEG signatures of paraplegic patients. The association of abnormalities in different subgroups of patients and their relation to the sensorimotor integration are relevant for the design, implementation and use of BCI systems in patient populations. This study explores the patterns of abnormalities of movement related cortical potentials (MRCP) during motor imagery tasks of feet and right hand in patients with paraplegia (including the subgroups with/without central neuropathic pain and complete/incomplete injury patients) and the level of distinctiveness of abnormalities in these groups using pattern classification. The most notable observed abnormalities were the amplified execution negativity and its slower rebound in the patient group. The potential underlying mechanisms behind these changes and other minor dissimilarities in patients' subgroups, as well as the relevance to BCI applications, are discussed. The findings are of interest from a neurological perspective as well as for BCI-assisted neuro-rehabilitation and therapy.

Motor Imagery

Optimal distinctiveness theory

Paraplegia

10.3389/fneng.2014.00035

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Citations (36)

Ambulatory Recording and Power Spectral Analysis by Autoregressive Modelling of Polygraphic Sleep Signals in Patients Suffering from Chronic Pain

Methods of Information in Medicine (1994)

Kim Dremstrup Asbjørn Mohr Drewes L. Svendsen K. Bjerregård S. J. Taagholt

Abstract: A portable digital recording system and the Nightingale sleep analyser have been applied to record polygraphical sleep signals in patients suffering from chronic pain. Using ambulatory recording the patient can sleep at home making the sleep more natural and reducing the costs. The recording system gives digital recordings of very good quality. It is shown that the Nightingale sleep analyser performs automatic sleep analysis with a quality comparable to visual interrater performance on disordered sleep. It furthermore provides means for extraction of spectral information useful for the description of the sleep-wakefulness processes and for diagnosing the sleep disorders. Using AR-model-based power spectral analysis, it is also shown that the power content in the alpha band relative to the delta power is significantly higher in patients suffering from non-specific chronic pain as compared to normal persons.

Sleep

Spectral Analysis

10.1055/s-0038-1634963

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Climatology of short-period mesospheric gravity waves over Halley, Antarctica (76°S, 27°W)

Journal of Atmospheric and Solar-Terrestrial Physics (2009)

Kim Dremstrup M. J. Taylor R. E. Hibbins M. J. Jarvis

Airglow

10.1016/j.jastp.2009.04.005

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Citations (46)