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Dun, H. (author)Accurate position solutions are in high demand for many emerging applications. Global navigation satellite systems (GNSS), however, may not meet the required positioning performance, especially in urban environments, due to multipath and weak received power of the GNSS signal that can be easily blocked by surrounding objects. To achieve a high...doctoral thesis 2021
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Rathi, Ambareesh (author)To assist in the fast alignment of tiny components, Prodrive Technologies has developed a type of camera system called the Component Alignment Sensor (CAS) that is used on a pick-and-place machine. The system uses an optical target as the reference during its assembly and final testing steps. Two main components of the target are a glass reticle...master thesis 2021
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Koopman, Laurence (author)Breast cancer is currently the most prevalent type of cancer. The concluding diagnosis can be obtained with an MRI-guided biopsy. However, due to respiratory movement and human error, the procedure can require multiple attempts, resulting in harmful consequences. To reach the target at the first attempt, the precision of the procedure should be...master thesis 2021
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Lie, Casper (author)Natural phenomena are continually changing the coastline and sculpting the land in various ways. By surveying these changes a map can be produced of a landscape in flux. But if the landscape is ever changing, what does it tell us about the precision of flux. The essay also tries to give an answer to the question if there can be error in flux or...master thesis 2021
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Prundeanu, Alin (author)Wheat is among the most important grains worldwide. For the assessment of wheat fields, image detection of spikes atop the plant containing grain is used. Previous work in deep learning for precision agriculture employs the already established object detectors, Faster R-CNN and YOLO, adapted for the given context. However, these models suffer...bachelor thesis 2021
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Hooijschuur, R.H.T. (author), Saikumar, N. (author), Hossein Nia Kani, S.H. (author), van Ostayen, R.A.J. (author)This paper presents the development of a contactless sensing system and the dynamic evaluation of an air-bearing-based precision wafer positioning system. The contactless positioning stage is a response to the trend seen in the high-tech industry, where the substrates are becoming thinner and larger to reduce the cost and increase the yield....journal article 2021
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Lăpădat, Alexandru M. (author), Tiberius, C.C.J.M. (author), Teunissen, P.J.G. (author)Smartphone accelerometers and low-cost Global Navigation Satellite System (GNSS) equipment have faced rapid and important advancement, opening a new door to deformation monitoring applications such as landslide, plate tectonics and structural health monitoring (SHM). The precision potential and operational feasibility of the equipment play an...journal article 2021
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Psychas, D.V. (author), Teunissen, P.J.G. (author), Verhagen, S. (author)The single-receiver integer ambiguity resolution-enabled variant of precise point positioning (PPP), namely PPP-RTK, has proven to be crucial in reducing the long convergence time of PPP solutions through the recovery of the integerness of the user-ambiguities. The proliferation of global navigation satellite systems (GNSS) supports various...journal article 2021
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Haji Aghajany, S. (author), Amerian, Yazdan (author), Verhagen, S. (author), Rohm, Witold (author), Schuh, Harald (author)Tropospheric wet delay, the main source of which is water vapor, is one of the major factors affecting the accuracy of positioning techniques using microwave. Tropospheric tomography is a powerful method to reconstruct the water vapor content in four-dimensional (4D) space. This paper studies the effect of using function-based and voxel-based...journal article 2021
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Vilasboas-Ribeiro, Iva (author), Curto, Sergio (author), van Rhoon, G.C. (author), Franckena, Martine (author), Paulides, Margarethus M. (author)The efficacy of a hyperthermia treatment depends on the delivery of well-controlled heating; hence, accurate temperature monitoring is essential for ensuring effective treatment. For deep pelvic hyperthermia, there are no comprehensive and systematic reports on MR thermometry. Moreover, data inclusion generally lacks objective selection...journal article 2021
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Ma, H. (author), Verhagen, S. (author), Psychas, D.V. (author), Monico, João Francisco Galera (author), Marques, Haroldo Antonio (author)The technology of integer ambiguity resolution-enabled precise-point-positioning (also referred to as PPP-AR) has been proven capable of providing comparable accuracy, efficiency, and productivity to long-baseline real-time kinematic positioning (RTK) during the last decade. Commercial PPP-AR services have been provided by different...journal article 2021
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Dun, H. (author), Tiberius, C.C.J.M. (author), Diouf, C.E.V. (author), Janssen, G.J.M. (author)This paper presents a methodology to design a sparse multiband ranging signal with a large virtual bandwidth, from which time delay and carrier phase are estimated by a low complexity multivariate maximum likelihood (ML) method. In the estimation model for a multipath channel, not all reflected paths are considered, and time delay and carrier...journal article 2021
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Saikumar, N. (author), Heinen, Kars (author), Hassan HosseinNia, S. (author)The ever-growing demands on speed and precision from the precision motion industry have pushed control requirements to reach the limitations of linear control theory. Nonlinear controllers like reset provide a viable alternative since they can be easily integrated into the existing linear controller structure and designed using industry...journal article 2021
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van den Toorn, S.W.M. (author), Spronck, J.W. (author), van Ostayen, R.A.J. (author), Lampaert, S.G.E. (author)The novel contribution of this research is insight into the influence of different parameters in the magnet configurations on the load and stiffness of a ferrofluid pressure bearing. It is shown that magnets with a small cross-section magnetized alternatively up and downwards combine a high load capacity and moderate stiffness while being low...journal article 2021
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Zwetsloot, Roel (author)The purpose of this thesis is to evaluate a top-level topology for ultra-accurate power supplies. Chapter 3 shows that precision power supplies exist, but these are expensive and not stable on the long term. The correction scheme proposed in chapter 2 brings the accuracy of the best metrology systems to a high efficiency, low-noise power sup-ply...master thesis 2020
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Kalisvaart, Dylan (author)Super-resolution microscopy methods are able to image samples with improved resolution over the diffraction limit. Single-molecule localization microscopy (SMLM) methods break the diffraction limit by sparsely activating fluorescent emitters. The resulting sparsity in the emission signal can be exploited by estimation algorithms, which enables...master thesis 2020
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Yang, M. (author)Multi-epoch Synthetic Aperture Radar Interferometry (InSAR) is widely used to estimate displacements of selected scatterers from phase observations. However, their interpretation needs a connection to objects in the real world. <br/><br/>To associate InSAR scatterers to their corresponding geo-objects, it is necessary to (i) accurately estimate...doctoral thesis 2020
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Ackaert, Gilles (author)For any space mission, the communication subsystem is an indispensable part of the satellite that carries the payload. Traditionally, on-board antennas transmitting Radio Frequency (RF) waves to the receiver have been used. Nowadays, laser communications is becoming increasingly popular due to its potential to become a license-free, secure and...master thesis 2020
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Buitenhuis, R.N. (author)The ever-increasing industry desire for improved performance makes linear controller design run into its fundamental limitations. A nonlinear controller, such as Reset Control (RC), is needed to overcome these. RC is promising since, unlike other nonlinear methods, it easily integrates into the PID design framework preferred by industry. Thus...master thesis 2020
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Zult, M.J. (author)In 2018, there were more than 200 million reported cases of malaria worldwide, most of which were in Africa. Adequate diagnostics are required to properly treat the disease. According to the WHO, microscopic examination of a blood smear is the Gold Standard of malaria diagnosis. Currently, it is a labor-intensive process requiring trained...master thesis 2020