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Wijnberg, K.M. (author), Nijhuis, S. (author), Hulscher, SJMH (author), van Bergen, J. (author), Meyer, Han (author), Hoonhout, B. (author), Janssen, M. (author), Hoekstra, J.D. (author), de Groot, A.V. (author), Goessen, P. (author), van Gelder-Maas, C. (author)
The land-sea interface is a very attractive location for humans to settle. In the case of low lying, sedimentary coastlines this can be a risky location, as these shorelines are inherently dynamic in nature. Accelerating rates of relative sea level rise will increase coastal erosion, creating world-wide growing demands for coastal protection...
abstract 2017
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de Groot, Daan (author), van der Meijs, Emiel (author)
In this thesis, the implementation of a passive, chipless, frequency coded RFID detection system for bedload transport studies is proposed. The proposed tag will be deployed in the semi-arid Río Colorado, Bolivia with the aim to develop quantitative sediment transport models that relate transport to grain size. Different algorithms are explored...
bachelor thesis 2019
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de Groot, Matthijs (author), Kartoredjo, Nando (author), Langerak, arjan (author), Malarev, Dmitry (author)
SeaState5 wants to facilitate the monitoring process for seabed cables of offshore wind farms. The company wants to achieve this by creating an unmanned vessel, named the Eagle, which can be analyzed from a remote location.<br/><br/>As students from TU Delft, we have been tasked to create a software framework that allows the Eagle to go to a...
bachelor thesis 2017
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Bot, Chris (author), de Groot, Arthur (author), de Spirlet, Aurore (author)
60 million people around the world have epilepsy, which is a neurological disorder that severely impacts their day to day life negatively. Currently available methods to reduce the effects of epilepsy are either ineffective or require expensive and invasive surgery. A new method has been found that can suppress epilepsy without the need of...
bachelor thesis 2022
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de Groot, Dayo (author)
In deze scriptie gaan we twee wiskundige objecten onderzoeken, het ultrafilter en de ultramacht. Zodra je in de wiskunde een nieuw object hebt bedacht zijn de eerste twee vragen die je stelt altijd 1) bestaat het? en 2) Als het bestaat, is het dan uniek, of zijn er meerdere? Nou is dat voor een ultrafilter relatief makkelijk te beantwoorden. In...
bachelor thesis 2022
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de Groot, T.H. (author), Brink, W.M. (author)
Deze thesis presenteert het ontwerp van een systeem dat de positie van zwemmers in water bepaalt. Het idee voor dit systeem is ontstaan binnen de vakgroep Wireless and Mobile Communications (WMC), onderdeel van de TU Delft. WMC ontwikkelde in 2007 een testopstelling voor driedimensionale positiebepaling die gebruik maakte van akoestische golven....
bachelor thesis 2008
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de Groot, J.J.A.M. (author)
This thesis gives a thorough description of the mathematical tool called reflection positivity, which can be used to prove the occurrence of phase transitions in physical models. A major result, although already known, is a theorem that gives tractable conditions on the Hamiltonian such that the Boltzmann functional is reflection positive. In...
bachelor thesis 2020
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Kraaijeveld, Michael (author), de Gruijl, David (author), Postma, Marco (author), Roos, Stefano (author), de Groot, Daan (author), van der Meijs, Emiel (author)
In this thesis, the implementation of a passive, chipless, frequency coded Radio-Frequency Identification (RFID) tag for bedload transport studies is proposed. The proposed tag will be deployed in the semi-arid Río Colorado river, Bolivia with the aim to develop quantitative sediment transport models that relate transport to grain size. The...
bachelor thesis 2019
document
de Groot, O. (author), Salentijn, J. (author)
The quality of audio amplifiers used in Hi-Fi sound installations is largely determined by the distortion of the output signal. This report proposes a method of improving the distortion reduction in audio amplifiers by using a topology with active feedback. The characteristics of the standard non-inverting amplifier are extended to this new...
bachelor thesis 2016
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Tapia Barroso, Roderick (author), de Groot, Dimme (author)
This thesis presents two submodules which are part of 'an FM Chirp Waveform Generator and Detector for Radar', namely the mixer and the modulator. The goal of this project is to design and simulate these submodules from an educational perspective. The modulator is implemented as a single-ended common-base Colpitts oscillator with modulation...
bachelor thesis 2020
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de Groot, Hugo (author)
The salinity profile in a coastal sea-river system is the result of balancing of salt transport due to mixing of the water by tides and the freshwater discharge from the river. When for example during times of drought freshwater discharge suddenly declines, the salinity in the river may increase significantly and threaten drinking water supplies...
bachelor thesis 2023
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van Beelen, R.C. (author), de Groot, S.C.A. (author)
Deze thesis beschrijft de ontwerpkeuzes, het ontwerp en het begin van de implementatie van een sensorsysteem dat voor e12,50 aan componenten de waterdiepte, temperatuur en conductiviteit meet in waterputten. Aan de hand van de temperatuur en de conductiviteit kan de zoutconcentratie benaderd worden. Er is gekozen voor een combinatie van nieuwe...
bachelor thesis 2016
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Schmehl, R. (author), Breukels, J. (author), Schwoll, J. (author), de Groot, S. (author)
conference paper 2011
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Moghaddasi, Hanie (author), Hunyadi, Borbala (author), van der Veen, A.J. (author), de Groot, N.M.S. (author), Hendriks, R.C. (author)
Atrial Fibrillation (AF) is the most sustained arrhythmia in the heart. On the surface electrocardiogram (ECG), AF is characterised by the irregular RR intervals and by fibrillatory waves or the absence of a P wave. Since AF is a progressive disease, timely and correct detection is crucial for AF treatment. Detailed insight into the areas of...
conference paper 2022
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Moghaddasi, Hanie (author), van der Veen, A.J. (author), de Groot, N.M.S. (author), Hunyadi, Borbala (author)
Atrial fibrillation (AF) is the most common arrhythmia in the heart. Two main types of AF are defined as paroxysmal and persistent. In this paper, we present a method to discriminate between the characteristics of paroxysmal and persistent using tensor decompositions of a multi-channel electrocardiogram (ECG) signal. For this purpose, ECG...
conference paper 2020
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de Groot, O.M. (author), Ferranti, L. (author), Gavrila, D. (author), Alonso-Mora, J. (author)
Navigating mobile robots through environments shared with humans is challenging. From the perspective of the robot, humans are dynamic obstacles that must be avoided. These obstacles make the collision-free space nonconvex, which leads to two distinct passing behaviors per obstacle (passing left or right). For local planners, such as receding...
conference paper 2023
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Khaled Mustafa, K.A. (author), de Groot, O.M. (author), Wang, X. (author), Kober, J. (author), Alonso-Mora, J. (author)
Balancing safety and efficiency when planning in crowded scenarios with uncertain dynamics is challenging where it is imperative to accomplish the robot's mission without incurring any safety violations. Typically, chance constraints are incorporated into the planning problem to provide probabilistic safety guarantees by imposing an upper bound...
conference paper 2023
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de Vries, J.W. (author), Sun, M. (author), de Groot, N.M.S. (author), Hendriks, R.C. (author)
Estimating tissue conductivity parameters from electrograms (EGMs) could be an important tool for diagnosing and treating heart rhythm disorders such as atrial fibrillation (AF). One of these parameters is the fibre direction, often assumed to be known in conductivity estimation methods. In this paper, a novel method to estimate the fibre...
conference paper 2023
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de Groot, Lucan (author), Xu, M. (author), Zuniga, Marco (author)
We explore a new alternative for drones to gather information from sensors. Instead of using the traditional radio-frequency spectrum, whose broadcast nature makes it more difficult to poll specific objects, we utilize the light spectrum. In our system, the drone carries a light, and flies to an area that it is interested in polling. Only the...
conference paper 2023
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Abdi, Bahareh (author), van der Veen, A.J. (author), de Groot, N.M.S. (author), Hendriks, R.C. (author)
In this study, we propose a novel approach for estimation of local activation times (LATs) in fractionated electrograms. Using an electrophysiological tissue model, we first formulate the electrogram array as a convolution of transmembrane currents with a distance kernel. These currents are more local activities and less affected by the...
conference paper 2019
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