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Zhang, A. (author)
Bio-mediated methods, such as microbially induced carbonate precipitation (MICP) and enzyme induced carbonate precipitation (EICP), have gained considerable attention as alternatives to invasive ground improvement techniques. MICP and EICP use biogeochemical processes to drive carbonate precipitation and bind soil grains, thereby improving the...
doctoral thesis 2024
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Broeders, Theo (author)
Reconstructing a minimum reticulation network from phylogenetic trees is used in evolutionary studies. In this thesis, we focus on finding temporal networks using cherry-picking sequences for binary trees with all taxa. Finding such a minimum reticulation temporal network is NP-hard.<br/><br/>We introduce an algorithm to find a minimum...
master thesis 2024
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Poppema, D.W. (author), Wüthrich, D. (author)
Follett et al. (2020a, https://doi.org/10.1029/2020gl089346) developed an analytical model to predict backwater rise by log jams, using the size and packing density of logs and the jam length, as well as river slope and bed roughness. We show that the model formulas can be rewritten using the Froude number instead of river slope and roughness...
journal article 2024
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Wang, Haoyuan (author)
The basic reproductive number (R0) of an infectious disease is the expected number of secondary cases infected by the first case in an otherwise susceptible population. In this thesis, based on this fundamental concept, we propose a new method: the IIN-TN method that could calculate R0 of a network from the local structure of the network under...
master thesis 2023
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Iyer, Sowmya (author)
The thesis presents an analysis of unsteady vortex shedding and vortex induced vibrations (VIV) on wind turbine blades using a combination of Stereoscopic Particle Image Velocimetry (SPIV) and Computational Fluid Dynamics (CFD). A spanwise uniform blade with a symmetric NACA0021 airfoil section, 0.075 m chord, and 0.4 m span was tested...
master thesis 2023
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Riemens, Noud (author)
Upper bounds for the kissing number can be written as a semidefinite program (SDP) through the Delsarte-Goethals-Seidel method for spherical codes. This thesis solves the resulting SDP with a cutting plane approach, in which a sequence of linear programs (LPs) is solved with the addition of linear constraints every round. We study the...
bachelor thesis 2023
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Kotturshettar, Sanath (author)
Stratified turbulent flows abound in environmental and industrial settings. Examples are atmospheric boundary layer flows, the transport of nutrients and organisms and the mixing of heat and salinity in the oceans, fluid flow in heat exchangers, and the transport of reactants and products in chemical reactions. These examples and many others...
master thesis 2023
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Keur, Hans (author)
In biology, phylogenetics is the study of the evolutionary history of and relations between e.g. species. Such data are often represented in trees. Remarkably, trees lack the representation of reticulation events, such as hybridization, while such events are believed to be important. One of the reasons why trees are widely used, is the enormous...
master thesis 2023
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Dobson, Daniel (author)
Street view imagery (SVI) is one of the largest (growing) resources in urban analytics. A global close-up of the urban environment, if you will, which is rich in (untapped) information such as floor count. Floor count is useful in many applications, from improving energy consumption calculations to creation of 3D city models without elevation...
master thesis 2023
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Liu, X. (author), Xiao, Yuchun (author), Jiang, Huihuang (author), Guo, Y. (author), Yu, Mengwen (author), Tan, Wanzhong (author)
This study presents the analogical assessment of the train-induced vibration and radiated noise in a proposed theater. The theater is to be constructed in a region with crowded metro lines, and the assessment is implemented in an analogical building with comparable structural type and metro condition. Prior to the assessment, the comparability...
journal article 2023
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Zhou, H. (author), Dorsman, J. L. (author), Mandjes, M. (author), Snelder, M. (author)
Activity-based travel demand models provide a high level of detail when modeling complex travel behavior. Since stochastic simulation is used, however, this high level may induce large random fluctuations in the output, necessitating many model reruns to produce reliable output. This may become prohibitive in terms of computation time when...
journal article 2023
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Castro-Silva, Davi (author), de Oliveira Filho, F.M. (author), Slot, Lucas (author), Vallentin, Frank (author)
The theta body of a graph, introduced by Grötschel, Lovász, and Schrijver (in 1986), is a tractable relaxation of the independent-set polytope derived from the Lovász theta number. In this paper, we recursively extend the theta body, and hence the theta number, to hypergraphs. We obtain fundamental properties of this extension and relate it...
journal article 2023
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Cambie, Stijn (author), Cames van Batenburg, W.P.S. (author), Davies, Ewan (author), Kang, Ross J. (author)
List coloring is an influential and classic topic in graph theory. We initiate the study of a natural strengthening of this problem, where instead of one list-coloring, we seek many in parallel. Our explorations have uncovered a potentially rich seam of interesting problems spanning chromatic graph theory. Given a (Formula presented.) -list...
journal article 2023
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van Berkel, S.L. (author), Alonso Del Pino, M. (author), Jung-Kubiak, Cecile (author), Chattopadhyay, Goutam (author)
The development of a low focal number and low-mass lens antenna is presented that enables terahertz spectroscopy applications on ultracompact platforms. The antenna operates efficiently over a 20% fractional bandwidth, from 450 to 550 GHz, with a gain of 50 dBi at 500 GHz. The antenna consists of a hyperbolic silicon lens that is placed in a...
journal article 2023
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Bravin, M. (author), Fanelli, Francesco (author)
In this paper, we perform the fast rotation limit ε→ 0 <sup>+</sup> of the density-dependent incompressible Navier–Stokes–Coriolis system in a thin strip Ωε:=R2×]-ℓε,ℓε[ , where ε∈]0,1] is the size of the Rossby number and ℓ<sub>ε</sub>&gt; 0 for any ε&gt; 0 . By letting ℓ<sub>ε</sub>⟶ 0 <sup>+</sup> for ε→ 0 <sup>+</sup> and considering...
journal article 2023
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Leonov, Andrey O. (author), Pappas, C. (author)
We present a systematic study of tilted spiral states obtained theoretically within the classical Dzyaloshinskii model for magnetic states in cubic non-centrosymmetric ferromagnets. Such tilted spirals are shown to stabilize under the competing effect of cubic and exchange anisotropies inherent to cubic helimagnets. By focusing on the...
journal article 2023
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Elgar, Peter (author)
RSA encryption standard is a vital component of everyday internet communication. It is currently seen as being unbreakable as the problem that it is based on, semiprime factorisation, is an NP problem. Therefore, to try and break RSA using the current state of the art factoring method will take thousands of years. However, thanks to the advent...
master thesis 2022
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Zandbergen, Anouk (author)
Commercial finite element software like COMSOL is build to be user-friendly. For example, the user does not have to find weak formulations, or discretise the partial differential equations by hand. One of the more difficult parts of using finite element software is deciding which solver method and solver parameters to choose, as the performance...
master thesis 2022
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Ramesh, Adithya (author)
The Dutch Electric Aviation Centre possesses and uses a Cessna Skymaster 337F as an experimental flying testbed to help gain knowledge to aid the transition towards hybrid/ electric aviation. The interaction between the rear propeller slipstream and the horizontal tail has been likened to the interaction of propeller-wing configurations seen on...
master thesis 2022
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Primavera, Alessandra (author)
We consider the game cops and robbers, which is a pursuit-evasion game played on a graph G. The cops and the robber take turns moving across the vertices of G, where the goal for the cops is to eventually catch the robber. Specifically, we study the cop number of G, i.e. the minimum number of cops that is needed to catch the robber on G. We...
bachelor thesis 2022
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