Gerd Vandersteen
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View article: Estimating Reaction Rate Constants from Impedance Spectra: Combining Microkinetic Modeling and Experiments of the Oxygen Evolution Reaction
Estimating Reaction Rate Constants from Impedance Spectra: Combining Microkinetic Modeling and Experiments of the Oxygen Evolution Reaction Open
Knowledge of the reaction rate constants can be vital in understanding electrochemical reaction mechanisms and their rate-determining processes. Although first-principles methods, such as density functional theory (DFT), provide valuable i…
View article: Neural Classification of Argument Elements and Styles in Arabic Competitive Debates
Neural Classification of Argument Elements and Styles in Arabic Competitive Debates Open
Argument mining for spoken Modern Standard Arabic (MSA) remains almost untouched, largely because no sizeable, well-annotated resource exists. We fill that gap with an 80-hour, 110-debate corpus drawn from 29 countries and labelled by expe…
View article: A Sub-5hz Respiratory Oscillometry Technique for Tracking Lung Mechanics During Mechanical Ventilation: Emulator Validation and First-in-Human Icu Pilot Study
A Sub-5hz Respiratory Oscillometry Technique for Tracking Lung Mechanics During Mechanical Ventilation: Emulator Validation and First-in-Human Icu Pilot Study Open
View article: iFLOW: A Framework and GUI to Quantify Effective Thermal Diffusivity and Advection in Permeable Materials From Temperature Time Series
iFLOW: A Framework and GUI to Quantify Effective Thermal Diffusivity and Advection in Permeable Materials From Temperature Time Series Open
iFLOW is a free, open‐source, and python‐based framework and graphical user interface to visualize and analyze temperature time series, and extract one dimensional thermal velocity, v T , and bulk effective thermal diffusivity, k e . Infor…
View article: Automating the Design of Multi-band Microstrip Antennas via Uniform Cross-Entropy Optimization
Automating the Design of Multi-band Microstrip Antennas via Uniform Cross-Entropy Optimization Open
Automating the design of microstrip antennas has been an active area of research for the past decade. By leveraging machine learning techniques such as Genetic Algorithms (GAs) or, more recently, Deep Neural Networks (DNNs), a number of wo…
View article: Latent space bias mitigation for predicting at-risk students
Latent space bias mitigation for predicting at-risk students Open
Researchers have observed the relationship between educational achievements and students' demographic characteristics in physical classroom-based learning. In the context of online education, recent studies were conducted to explore the le…
View article: Breathing removal using Gaussian process regression for improved parametric impedance estimation of human respiratory system
Breathing removal using Gaussian process regression for improved parametric impedance estimation of human respiratory system Open
Respiratory Oscillometry is a promising technique to provide information to medical practitioners on the respiratory system of a patient in a non-invasive fashion. It focuses on identifying the respiratory impedance between the air pressur…
View article: LPMLE<i>n</i>–A Frequency Domain Method to Estimate Vertical Streambed Fluxes and Sediment Thermal Properties in Semi‐Infinite and Bounded Domains
LPMLE<i>n</i>–A Frequency Domain Method to Estimate Vertical Streambed Fluxes and Sediment Thermal Properties in Semi‐Infinite and Bounded Domains Open
This paper presents the LPMLE n , a new method to estimate vertical flux and thermal diffusivity from streambed temperature time series using the frequency domain. The main advantages of this new method are: (a) the use of multiple frequen…
View article: A flexible feature selection approach for predicting students’ academic performance in online courses
A flexible feature selection approach for predicting students’ academic performance in online courses Open
View article: Correcting for non-periodic behaviour in perturbative experiments: application to heat pulse propagation and modulated gas-puff experiments
Correcting for non-periodic behaviour in perturbative experiments: application to heat pulse propagation and modulated gas-puff experiments Open
This paper introduces a recent innovation in dealing with non-periodic behavior often referred to as transients in perturbative experiments. These transients can be the result from the unforced response due to the initial condition and oth…
View article: A novel frequency domain maximum likelihood approach for estimating transport coefficients in cylindrical geometry for nuclear fusion devices
A novel frequency domain maximum likelihood approach for estimating transport coefficients in cylindrical geometry for nuclear fusion devices Open
This paper introduces a novel maximum likelihood approach to determine the local thermal transport coefficients belonging to diffusion and convection from excitation (perturbative) transport experiments. It extends previous work developed …
View article: Design and implementation of a digital mixer with digital logic
Design and implementation of a digital mixer with digital logic Open
A mixer is a device whose output frequency is a sum or a difference of input frequencies. With f1 and f2 as input frequencies, the output frequency is f1+f2 or |f1-f2|. The mixer is generally an analogue device. In this work, we suggest a …
View article: Accurate estimation of the non-parametric FRF of lightly-damped mechanical systems using arbitrary excitations
Accurate estimation of the non-parametric FRF of lightly-damped mechanical systems using arbitrary excitations Open
View article: Mathematical equivalence of non-local transport models and broadened deposition profiles
Mathematical equivalence of non-local transport models and broadened deposition profiles Open
Old and recent experiments show that there is a direct response to the heating power of transport observed in modulated electron cyclotron heating (ECH) experiments both in tokamaks and stellarators, which is commonly known as non-local tr…
View article: Separation of transport in slow and fast time-scales using modulated heat pulse experiments (hysteresis in flux explained)
Separation of transport in slow and fast time-scales using modulated heat pulse experiments (hysteresis in flux explained) Open
Old and recent experiments show that there is a direct response to the heating power of transport observed in modulated ECH experiments both in tokamaks and stellarators. This is most apparent for modulated experiments in the Large Helical…
View article: A systematic approach to optimize excitations for perturbative transport experiments
A systematic approach to optimize excitations for perturbative transport experiments Open
In this paper, techniques for optimal input design are used to optimize the waveforms of perturbative experiments in modern fusion devices. The main focus of this paper is to find the modulation frequency for which the accuracy of the esti…
View article: Determining the electron transport mechanisms from direct heat flux reconstructions
Determining the electron transport mechanisms from direct heat flux reconstructions Open
View article: Heat flux reconstruction and effective diffusion estimation from perturbative experiments using advanced filtering and confidence analysis
Heat flux reconstruction and effective diffusion estimation from perturbative experiments using advanced filtering and confidence analysis Open
The heat flux is one of the key parameter used to quantify and understand transport in fusion devices. In this paper, a new method is introduced to calculate the heat flux including its confidence with high accuracy based on perturbed meas…
View article: Impact of the Missing Data Pattern, the Oversampling, the Noise Level, and the Excitation on Nonparametric Frequency Response Function Estimates
Impact of the Missing Data Pattern, the Oversampling, the Noise Level, and the Excitation on Nonparametric Frequency Response Function Estimates Open
Nonparametric frequency response function estimation (FRF) is a first important step towards successful parametric modelling of the dynamics. In some applications such as, for example, low-cost wireless sensor networks, sensors are subject…
View article: New evidence and impact of electron transport non-linearities based on new perturbative inter-modulation analysis
New evidence and impact of electron transport non-linearities based on new perturbative inter-modulation analysis Open
A new methodology to analyze non-linear components in perturbative transport experiments is introduced. The methodology has been experimentally validated in the Large Helical Device for the electron heat transport channel. Electron cyclotr…
View article: Distortion Contribution Analysis with the Best Linear Approximation
Distortion Contribution Analysis with the Best Linear Approximation Open
A Distortion Contribution Analysis (DCA) obtains the distortion at the output of an analog electronic circuit as a sum of distortion contributions of its sub-circuits. Similar to a noise analysis, a DCA helps a designer to pinpoint the act…
View article: LPMLE3: A novel 1‐D approach to study water flow in streambeds using heat as a tracer
LPMLE3: A novel 1‐D approach to study water flow in streambeds using heat as a tracer Open
We introduce LPMLE3, a new 1‐D approach to quantify vertical water flow components at streambeds using temperature data collected in different depths. LPMLE3 solves the partial differential equation for coupled water flow and heat transpor…
View article: Quantifying Vertical Streambed Fluxes Using Heat as a Tracer: Applying Two Novel Frequency Domain Approaches
Quantifying Vertical Streambed Fluxes Using Heat as a Tracer: Applying Two Novel Frequency Domain Approaches Open
View article: Structure discrimination in block-oriented models using linear approximations: A theoretic framework
Structure discrimination in block-oriented models using linear approximations: A theoretic framework Open
View article: LPMLE3 : A New Analytical Approach to Determine Vertical Groundwater-Surface Water Exchange Flux under Uncertainty and Heterogeneity
LPMLE3 : A New Analytical Approach to Determine Vertical Groundwater-Surface Water Exchange Flux under Uncertainty and Heterogeneity Open
View article: Studying temporal and spatial variations of groundwater-surface water exchange flux for the Slootbeek (Belgium) using the LPML method
Studying temporal and spatial variations of groundwater-surface water exchange flux for the Slootbeek (Belgium) using the LPML method Open
(1) Vrije Universiteit Brussel (VUB), Department of Hydrology and Hydraulic Engineering, Brussels, Belgium ([email protected], [email protected]), (2) Flemish Institute for Technological Research (VITO), Environmental Modeling Unit, Mol, …