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de Vrijer, T. (author), Wiering, M. (author), van Nijen, D.A. (author), Padmakumar, G. (author), Sambamurthy, S. (author), Limodio, G. (author), Smets, A.H.M. (author)Surface textures that result in high optical yields are crucial for high efficiency photovoltaic (PV) devices. In this work three different texturing approaches are presented that result in smooth concave structures devoid of sharp features. Such features can sustain the crack-free growth of device quality nano- to poly-crystalline materials...journal article 2022
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Peng, Q. (author), Vermolen, F.J. (author)Deep dermal wounds induce skin contraction as a result of the traction forcing exerted by (myo)fibroblasts on their immediate environment. These (myo)fibroblasts are skin cells that are responsible for the regeneration of collagen that is necessary for the integrity of skin We consider several mathematical issues regarding models that...journal article 2022
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Koh, Kim Jie (author), Toshniwal, D. (author), Cirak, Fehmi (author)Easy to construct and optimally convergent generalisations of B-splines to unstructured meshes are essential for the application of isogeometric analysis to domains with non-trivial topologies. Nonetheless, especially for hexahedral meshes, the construction of smooth and optimally convergent isogeometric analysis basis functions is still an...journal article 2022
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Das, B. (author), Hanjalic, A. (author), Isufi, E. (author)Data processing over graphs is usually done on graphs of fixed size. However, graphs often grow with new nodes arriving over time. Knowing the connectivity information of these nodes, and thus, the expanded graph is crucial for processing data over the expanded graph. In its absence, its inference and the subsequent data processing become...journal article 2022
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Peng, Q. (author), Vermolen, F.J. (author)Skin contraction is an important biophysical process that takes place during and after recovery of deep tissue injury. This process is mainly caused by fibroblasts (skin cells) and myofibroblasts (differentiated fibroblasts which exert larger pulling forces and produce larger amounts of collagen) that both exert pulling forces on the...journal article 2022
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Ranka, Preeti (author)With the growing offshore wind industry, ramp events, i.e., significant variation in wind speed (or power) within a short time period, have become of critical importance to the end-users. The analysis of wind power ramp events from the perspective of grid operators or energy traders is prevalent in the literature. Nonetheless, this area of...master thesis 2021
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Yanakieva, Kalina (author)The paper investigates the power-relations that define the urbanization of an Extra-Statecraft zone, process them in a phenomenological view of the indigenous people in the case-study of Gwadar, Pakistan. Criticizing the monotonous manner with which the zone Deterritorializes and diminishes existing practices within a context, to argue for the...master thesis 2021
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Meyer, Johann (author)Aircraft are complex systems with, in some cases, high-dimensional nonlinear interactions between control surfaces. When a failure occurs, adaptive flight control methods can be utilised to stabilise and make the aircraft controllable. Adaptive flight control methods, however, require accurate aerodynamic models - where first-order continuity is...master thesis 2021
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Xiao, C. (author)In the community of petroleum engineering, the use of surrogate modelling techniques have recently gained more and more popularity to improve the efficiency of history matching. However, it is still not possible to fully utilize their potential in realistic applications. One of the challenges is to retain high accuracy while increasing the...doctoral thesis 2021
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Li, Bingcong (author), Coutino, Mario (author), Giannakis, Georgios B. (author), Leus, G.J.T. (author)With the well-documented popularity of Frank Wolfe (FW) algorithms in machine learning tasks, the present paper establishes links between FW subproblems and the notion of momentum emerging in accelerated gradient methods (AGMs). On the one hand, these links reveal why momentum is unlikely to be effective for FW-type algorithms on general...journal article 2021
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Draycott, S. (author), Li, Y. (author), Stansby, P.K. (author), Adcock, T.A.A. (author), van den Bremer, T.S. (author)Abrupt depth transitions (ADTs) have been shown to induce the release of bound waves into free waves, which results in spatially inhomogeneous wave fields atop ADTs. Herein, we examine the role of free-wave release in the generation and spatial distribution of higher-harmonic wave components and in the onset of wave breaking for very steep...journal article 2021
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Toshniwal, D. (author), Hughes, Thomas J.R. (author)Spaces of discrete differential forms can be applied to numerically solve the partial differential equations that govern phenomena such as electromagnetics and fluid mechanics. Robustness of the resulting numerical methods is complemented by pointwise satisfaction of conservation laws (e.g., mass conservation) in the discrete setting. Here we...journal article 2021
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Polynomial spline spaces of non-uniform bi-degree on T-meshes: combinatorial bounds on the dimensionToshniwal, D. (author), Mourrain, Bernard (author), Hughes, Thomas J. R. (author)Polynomial splines are ubiquitous in the fields of computer-aided geometric design and computational analysis. Splines on T-meshes, especially, have the potential to be incredibly versatile since local mesh adaptivity enables efficient modeling and approximation of local features. Meaningful use of such splines for modeling and approximation...journal article 2021
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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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Toshniwal, D. (author), DiPasquale, Michael (author)In this paper, we study the dimension of bivariate polynomial splines of mixed smoothness on polygonal meshes. Here, “mixed smoothness” refers to the choice of different orders of smoothness across different edges of the mesh. To study the dimension of spaces of such splines, we use tools from homological algebra. These tools were first applied...journal article 2021
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Eivani, A.R. (author), Vafaeenezhad, H. (author), Jafarian, H. R. (author), Zhou, J. (author)The faults in welding design and process every so often yield defective parts during friction stir welding (FSW). The development of numerical approaches including the finite element method (FEM) provides a way to draw a process paradigm before any physical implementation. It is not practical to simulate all possible designs to identify the...journal article 2021
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Kanehira, T. (author), McAllister, M. L. (author), Draycott, S. (author), Nakashima, T. (author), Taniguchi, N. (author), Ingram, D. M. (author), van den Bremer, T.S. (author), Mutsuda, H. (author)Wave breaking in the ocean affects the height of extreme waves, energy dissipation, and interaction between the atmosphere and upper ocean. Numerical modelling is a critical step in understanding the physics of wave breaking and offers insight that is hard to gain from field data or experiments. High-fidelity numerical modelling of three...journal article 2021
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van Neerven, J.M.A.M. (author), Veraar, M.C. (author)We prove a new Burkholder–Rosenthal type inequality for discrete-time processes taking values in a 2-smooth Banach space. As a first application we prove that if (S(t, s)) <sub>⩽</sub><sub>s</sub><sub>≤</sub><sub>t</sub><sub>⩽</sub><sub>T</sub> is a C-evolution family of contractions on a 2-smooth Banach space X and (Wt)t∈[0,T] is a...journal article 2021
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Schoups, G.H.W. (author), Nasseri, M. (author)To fully benefit from remotely sensed observations of the terrestrial water cycle, bias and random errors in these data sets need to be quantified. This paper presents a Bayesian hierarchical model that fuses monthly water balance data and estimates the corresponding data errors and error-corrected water balance components (precipitation,...journal article 2021
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Hu, Weifei (author), Chen, Weiyi (author), Wang, Xiaobo (author), Jiang, Zhiyu (author), Wang, Yeqing (author), Verma, Amrit Shankar (author), Teuwen, Julie J.E. (author)The rain-induced fatigue damage in the wind turbine blade coating has attracted increasing attention owing to significant repair and maintenance costs. The present paper develops an improved computational framework for analyzing the wind turbine blade coating fatigue induced by rain erosion. The paper first presents an extended stochastic...journal article 2021