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van Belkom, Myrte (author)In this thesis we apply the numerical method of Morphological Geometric Active Contours as proposed by Alvarez, Baumela and Marquez-Neila to microscopic images of plant cells. The goal is to find all plant cells in the images, and then to find their cell walls. This is done in order to calculate certain properties of these cells automatically,...bachelor thesis 2018
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den Bakker, Duncan (author)The theory of active contours is applied to microscopic images of cells. A model is developed that approximates cell borders by dynamic curves. This model is based on gradient vector flow (GVF), an external force that acts on the contours. Both active contours and the GVF force field are defined as functions that minimize certain functionals....bachelor thesis 2018
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Smit, Jordi (author), van Niekerk, Matthijs (author), Oosterbaan, Robin (author), van Gelder, Daniël (author), Tromer, Stephan (author)Scenwise is a business working on innovative and sophisticated solutions in the domain of traffic management. Leveraging data science and IT systems, Scenwise delivers products to institutions to facilitate efficient traffic management. In order to manage the highly complex network of infrastructure on the road network, traffic managers need to...bachelor thesis 2019
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Kerst, Arthur (author)Deformable energy-minimizing contours are used in image analysis, particularly to detect boundaries from objects. From the Mumford-Shah model we derive an equation to move such contours towards the boundary, which minimizes the functional. The external force is computed using the mean value of the inside and outside area of the contour. Various...bachelor thesis 2018
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Wagenaar, Claire (author)In this thesis, several image segmentation techniques will be tested that eventually will be applied to MRI brain scans in order to detect hydrocephalus. The meth- ods include Sobel edge detection, Canny edge detection, active contour model (also known as snakes), k-means clustering and region growing. Furthermore two exten- sions are discussed....bachelor thesis 2020
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Kinayoglu, G. (author)This paper presents an algorithm for the formation of single or double curved revolved surfaces infrastructures through standardized parts. Any revolved surface can be generated with only two types of parts, interconnected by a ribbed structure technique. The proposed method differs from the accustomed orthogonal rib structures by the varying...conference paper 2013
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Saeidtehrani, S. (author), Lavidas, G. (author), Metrikine, A. (author)The process of finding values of extreme waves and their impacts on wave energy converter (WEC) responses, depends on both wave resources and WEC dynamic characteristics. A wide range of waves can influence the reliability of operation and survivability of a WEC. In this paper, a methodology is described to find specific values of wave heights...conference paper 2022
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Opstal, Willem van (author), Meijers, B.M. (author), Peters, R.Y. (author)Navigational charts play a vital role in a ship's safety while navigating the seas, rivers or lakes. With most of the features and obstructions being out of sight -below sea-level - these charts are more critical than e.g. topographic maps. For routing but also positioning, depth information is a key aspect on these charts. This depth...conference paper 2020
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Seyffert, Harleigh C. (author), Kana, A.A. (author), Troesch, Armin W. (author)This paper examines the performance of 6 stiffened ship panel designs in different operational profiles. The main question of interest is: which sea states will lead to the worst panel performances in terms of reliability? As stiffened panel collapse is governed by combined lateral and in-plane loading effects (non-linear functions of the...conference paper 2021
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Zhang, Li (author), Dong, Y. (author), Farah, H. (author), van Arem, B. (author)The gradual deployment of automated vehicles (AVs) results in mixed traffic where AVs will interact with human-driven vehicles (HDVs). Thus, social-aware motion planning and control while considering interactions with HDVs on the road is critical for AVs' deployment and safe driving under various maneuvers. Previous research mostly focuses on...conference paper 2023
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Amiri-Simkooei, A. (author)In this thesis we study the method of least-squares variance component estimation (LS-VCE) and elaborate on theoretical and practical aspects of the method. We show that LS-VCE is a simple, flexible, and attractive VCE-method. The LS-VCE method is simple because it is based on the well-known principle of least-squares. With this method the...doctoral thesis 2007
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Teunissen, P.J.G. (author), Amiri-Simkooei, A.R. (author)Least-squares variance component estimation (LS-VCE) is a simple, flexible and attractive method for the estimation of unknown variance and covariance components. LS-VCE is simple because it is based on the well-known principle of LS; it is flexible because it works with a user-defined weight matrix; and it is attractive because it allows one to...journal article 2007
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Qi, Jiaming (author), Ma, Guangfu (author), Zhu, J. (author), Zhou, Peng (author), Lyu, Yueyong (author), Zhang, Haibo (author), Navarro-Alarcon, David (author)The robotic manipulation of composite rigid-deformable objects (i.e., those with mixed nonhomogeneous stiffness properties) is a challenging problem with clear practical applications that, despite the recent progress in the field, it has not been sufficiently studied in the literature. To deal with this issue, in this article, we propose a...journal article 2022
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Pramana, K.E.R. (author), Ertsen, M.W. (author)In the first decade of the 21st century, a water harvesting approach based on contour trenches—ditches to catch runoff—from Kenya was proposed as groundwater recharge technology in a semi-arid area in Ninh Phuoc district, Vietnam. In order to modify this solutions to tackle water scarcity, hydrological conditions at the site needed to be known....journal article 2022
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Nguyen, T.T. (author), Calvert, S.C. (author), Vu, Hai L. (author), van Lint, J.W.C. (author)Highway bottlenecks are responsible for the majority of traffic congestion. Although the problem of bottleneck detection is not new, contemporary methods have not solved the problem thoroughly with regards to bottleneck locations, activation time, and related congestion tracking. These elements are essential for identifying and characterizing a...journal article 2021
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Dangal, S. (author), Smulders, M. (author), Vink, P. (author)This paper investigates whether spring-foam technology in an aircraft seat-pan can reduce weight and at the same time provide equal or better comfort. Firstly, through literature studies and using an iterative design process a prototype seat-pan was designed and developed using spring-foam technology. The (dis)comfort of this seat was...journal article 2021
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Kundarapu, Laxman Kumar (author), Choudhury, Satyajeet (author), Acharya, Sriprasad (author), Vatti, Anoop Kishore (author), Pandiyan, Sudharsan (author), Gadag, Shivaprasad (author), Nayak, Usha Yogendra (author), Dey, P. (author)The aggregation behavior of asphaltene in the toluene-hexane mixture is systematically investigated using experimental techniques such as optical microscopy and Fourier-transform infrared spectroscopy (FTIR) combined with molecular dynamics (MD) simulations. The optical images of various asphaltene concentrations are processed to determine...journal article 2021
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Zheng, Zhenqi (author), Xiao, Xiongwu (author), Zhong, Zhi Chao (author), Zang, Y. (author), Yang, Nan (author), Tu, Jianguang (author), Li, Deren (author)Digital Elevation Model (DEM)-based mountain vertex extraction is one of the most useful DEM applications, providing important information to properly characterize topographic features. Current vertex-extraction techniques have considerable limitations, such as yielding low-accuracy results and generating false mountain vertices. To overcome...journal article 2021
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Aselmaa, A. (author), van Herk, Marcel (author), Laprie, Anne (author), Nestle, Ursula (author), Götz, Irina (author), Wiedenmann, Nicole (author), Schimek-Jasch, Tanja (author), Picaud, Francois (author), Syrykh, Charlotte (author), Cagetti, Leonel (author), Jolnerovski, Maria (author), Song, Y. (author), Goossens, R.H.M. (author)Sensemaking theories help designers understand the cognitive processes of a user when he/she performs a complicated task. This paper introduces a two-step approach of incorporating sensemaking support within the design of health information systems by: (1) modeling the sensemaking process of physicians while performing a task, and (2)...journal article 2017
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Aselmaa, A. (author), van Herk, Marcel (author), Song, Y. (author), Goossens, R.H.M. (author), Laprie, Anne (author)Fully or semi-automatic contouring tools are increasingly being used in the tumor contouring task for radiotherapy. While the fully automatic contouring tools have not reached sufficient efficiency, the semi-automatic contouring tools balance more effectively between the human interaction and automation. This study evaluates the influences of...journal article 2017