document

Structuring properties of irrigation systems: Understanding relations between humans and hydraulics through modeling

Ertsen, M.W. (author)

Irrigation systems were clearly important in ancient times in supplying crops with water. This requires physical distribution facilities and socio-political arrangements to coordinate between actors. Resulting systems are highly diverse, and are being studied extensively within archeology and history. Whether initiated by a central authority or...

journal article 2010

document

Effect of Y Distribution on the Oxidation Kinetics of NiCoCrAlY Bond Coat Alloys

Nijdam, T.J. (author), Sloof, W.G. (author)

The relation between the Y distribution in the alloy and the growth kinetics of the developing oxide scale was studied for the thermal oxidation of two Ni–20Co–19Cr–24Al–0.2Y (at.%) alloys at 1,373 K: (i) a coarse-grain cast alloy with large Ni5Y intermetallic precipitates, and (ii) a fine-grain freestanding coating with small Ni5Y precipitates....

journal article 2007

document

Agent-oriented modeling of the dynamics of biological organisms

Jonker, C.M. (author), Treur, J. (author)

journal article 2007

document

Experimental Closed-Loop Excitation of Nonlinear Normal Modes on an Elastic Industrial Robot

Bjelonic, Filip (author), Sachtler, Arne (author), Albu-Schaffer, Alin (author), Della Santina, C. (author)

Adding elastic elements to the mechanical structure should enable robots to perform efficient oscillatory tasks. Still, even characterizing natural oscillations in nonlinear systems is a challenge in itself, which nonlinear modal theory promises to solve. Therein eigenmanifolds generalize eigenspaces to mechanical systems with non-Euclidean...

journal article 2022

document

Modeling of Resonant Tunneling Diode Oscillators Based on the Time-Domain Boundary Element Method

Lasisi, S.O. (author), Benson, T.M. (author), Greenaway, M.T. (author), Gradoni, G. (author), Cools, K. (author)

We demonstrate how the coupling of a full-wave time-domain boundary element method (BEM) solver with a circuit solver can be used to model 1) the generation of high frequency oscillations in resonant tunneling diode (RTD) oscillators, and 2) the mutual coupling and synchronization of non-identical RTDs with significant differences in frequencies...

journal article 2022

document

Hidden Figures of Photo-charging: a thermo-electrochemical approach for a solar-rechargeable redox flow cell system

Bae, D. (author), Faasse, Richard (author), Smith, W.A. (author)

Achieving high current densities without thermal performance degradation at high temperatures is one of the main challenges for enhancing the competitiveness of photo-electrochemical energy storage systems. We describe a system that overcomes this challenge by incorporating an integrated photoelectrode with a redox flow cell, which functions...

journal article 2020

document

A One-step Approach for Centralized Overactuated Motion Control of a Prototype Reticle Stage

Tacx, Paul (author), Oomen, T.A.E. (author)

Next-generation motion stages are envisaged to be lightweight to meet stringent demands regarding accuracy and throughput. The lightweight stage design implies flexible dynamical behavior, which is foreseen to be severely excited due to increasing acceleration forces. The aim of this paper is to exploit additional actuators and sensors to...

journal article 2022

document

Eliminating VT uncertainties in modeling ferroresonance phenomena caused by single phase-to-ground faults in isolated neutral network

Zirka, S.E. (author), Moroz, Y.I. (author), Zhuykov, A.V. (author), Matveev, D.A. (author), Kubatkin, M.A. (author), Frolov, M.V. (author), Popov, M. (author)

It is commonly recognized that correct transformer model (particularly topological one) is a key element for any ferroresonance simulations. This paper represents a line of reasoning by which a reliable model of a voltage transformer (VT) can be constructed given substantial uncertainties in its parameters and characteristics. Starting with...

journal article 2021

document

Computation of internal voltage distribution in transformer windings by utilizing a voltage distribution factor

Theocharis, A. (author), Popov, M. (author), Terzija, Vladimir (author)

In this paper, a method for the application of the black-box transformer models to the lumped-parameter transformer winding models is presented. The methodology is based on applying terminal transformer voltages as input parameters that could be provided by using the powerful black box vector fitting. Then, internal voltage distribution is...

journal article 2016

document

Objective and subjective responses to motion sickness: the group and the individual

Irmak, T. (author), Pool, D.M. (author), Happee, R. (author)

We investigated and modeled the temporal evolution of motion sickness in a highly dynamic sickening drive. Slalom maneuvers were performed in a passenger vehicle, resulting in lateral accelerations of 0.4 g at 0.2 Hz, to which participants were subjected as passengers for up to 30 min. Subjective motion sickness was recorded throughout the...

journal article 2020

document

Design, modeling, optimization, manufacturing and testing of variable-angle filament-wound cylinders

Almeida, José Humberto S. (author), St-Pierre, Luc (author), Wang, Z. (author), Ribeiro, Marcelo L. (author), Tita, Volnei (author), Amico, Sandro C. (author), Castro, Saullo G.P. (author)

This work demonstrates the potential of manufacturing variable-angle composite cylinders via filament winding (FW), called VAFW. The proposed design strategy allows different filament angles along the axial direction by dividing the cylinder into regions of constant angle called frames. Designs using two, four, or eight frames are herein...

journal article 2021

document

Lattice modeling and testing of aerated autoclaved concrete infilled frames

Aydin, B.B. (author), Binici, Baris (author), Hendriks, M.A.N. (author), Tuncay, Kagan (author)

Significant infill wall damage in reinforced concrete frame buildings was observed in the past earthquakes. A vast number of numerical approaches have been proposed to estimate the non-linear behavior of infilled frames at different scales. Mesoscale lattice models were successfully used in the past to simulate the behavior of reinforced...

journal article 2022

document

International benchmarking of terrestrial laser scanning approaches for forest inventories

Liang, Xinlian (author), Hyyppä, Juha (author), Kaartinen, Harri (author), Lehtomäki, Matti (author), Pyörälä, Jiri (author), Pfeifer, Norbert (author), Holopainen, Markus (author), Wang, Di (author), Wang, J. (author)

The last two decades have witnessed increasing awareness of the potential of terrestrial laser scanning (TLS) in forest applications in both public and commercial sectors, along with tremendous research efforts and progress. It is time to inspect the achievements of and the remaining barriers to TLS-based forest investigations, so further...

journal article 2018

document

Machine learning in process systems engineering: Challenges and opportunities

Daoutidis, Prodromos (author), Lee, Jay H. (author), Rangarajan, Srinivas (author), Chiang, Leo (author), Gopaluni, Bhushan (author), Schweidtmann, A.M. (author), Harjunkoski, Iiro (author), Mercangöz, Mehmet (author), Mesbah, Ali (author)

This “white paper” is a concise perspective of the potential of machine learning in the process systems engineering (PSE) domain, based on a session during FIPSE 5, held in Crete, Greece, June 27–29, 2022. The session included two invited talks and three short contributed presentations followed by extensive discussions. This paper does not...

journal article 2024

document

The role of vision in sensory integration models for predicting motion perception and sickness

Kotian, V. (author), Irmak, T. (author), Pool, D.M. (author), Happee, R. (author)

Users of automated vehicles will engage in other activities and take their eyes off the road, making them prone to motion sickness. To resolve this, the current paper validates models predicting sickness in response to motion and visual conditions. We validate published models of vestibular and visual sensory integration that have been used...

journal article 2024

document

Performance of an internally cooled and heated desiccant-coated heat and mass exchanger: Effectiveness criteria and design methodology

Jagirdar, Mrinal (author), Lee, Poh Seng (author), Padding, J.T. (author)

Internally cooled and heated desiccant-coated heat and mass exchangers (ICHDHMX) driven by low-grade heat are very attractive owing to their energy-saving potential, especially for applications where substantial moisture removal (such as air-conditioning) is a necessity. In this paper, we derive equations for the performance of an ideal...

journal article 2021

document

Data-driven Abstractions for Verification of Linear Systems

Coppola, R. (author), Peruffo, A. (author), Mazo, M. (author)

We introduce a novel approach for the construction of symbolic abstractions - simpler, finite-state models - which mimic the behaviour of a system of interest, and are commonly utilized to verify complex logic specifications. Such abstractions require an exhaustive knowledge of the concrete model, which can be difficult to obtain in real...

journal article 2023

document

Field Model Identification and Control of a Mobile Electromagnet for Remote Actuation of Soft Robots

Riccardi, A. (author), Furtado, Guilherme P. (author), Sikorski, Jakub (author), Vendittelli, Marilena (author), Misra, Sarthak (author)

The actuation of miniaturized robots through external magnetic fields has great potential for medical applications. The controllability properties of the miniaturized robots are affected by magnetic field generation modality. In this work, the magnetic field of a mobile electromagnet, notably capable to generate a desired magnetic field in...

journal article 2023

document

Model-based optimization of multistage ultrafiltration/diafiltration for recovery of canola protein

Rizki, Z. (author), Ravesloot, Richard (author), van Beckhoven, Ruud (author), Ottens, M. (author)

The ultrafiltration/diafiltration (UF/DF) process is a crucial step in the canola protein isolation process from rapeseed meal. The process involves using a multi-stage membrane system to separate components of the mixture. As diafiltration dilutes the feed stream in the ultrafiltration system, a large amount of diafiltration water is...

journal article 2023

document

A biomechanical mathematical model for the collagen bundle distribution-dependent contraction and subsequent retraction of healing dermal wounds

Koppenol, D.C. (author), Vermolen, F.J. (author), Niessen, Frank B. (author), van Zuijlen, Paul P.M. (author), Vuik, Cornelis (author)

A continuum hypothesis-based, biomechanical model is presented for the simulation of the collagen bundle distribution-dependent contraction and subsequent retraction of healing dermal wounds that cover a large surface area. Since wound contraction mainly takes place in the dermal layer of the skin, solely a portion of this layer is included...

journal article 2016