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Diaz Cortes, G.B. (author), Vuik, C. (author), Jansen, J.D. (author)
We study fast and robust iterative solvers for large systems of linear equations resulting from simulation of flow trough strongly heterogeneous porous media. We propose the use of preconditioning and deflation techniques, based on information obtained frfrom the system, to reduce the time spent in the solution of the linear system.An important...
journal article 2018
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Zhao, Z. (author)
Correspondence theory originally arises as the study of the relation between modal formulas and first-order formulas interpreted over Kripke frames. We say that a modal formula and a first-order formula correspond to each other if they are valid on the same class of Kripke frames. Canonicity theory is closely related to correspondence theory. We...
doctoral thesis 2018
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Piazzai, M. (author)
This dissertation addresses the question of how the information encoded by category labels is interpreted by agents in a market for the purpose of decision-making. To this end, we first examine the influence of categorization on economic and strategic outcomes with two empirical studies, and then use the insights provided by these studies to...
doctoral thesis 2018
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Renzsch, H.F. (author)
While historically sailmaking and saildesign were considered as arts, in the 20th century, mainly from the 1980s onwards, engineering sciences have started to play an important role. Two fields are of particular interest: structural and fluid mechanics. Initially, the sails were tested in the wind tunnel, aggregate flow forces measured and the...
doctoral thesis 2018
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Tajalizadehkhoob, S. (author)
In theory, hosting providers can play an important role in fighting cybercrime and misuse. This is because many online threats, be they high-profile or mundane, use online storage infrastructure maintained by hosting providers at the core of their criminal operations.
However, in practice, we see large differences in the security measures...
doctoral thesis 2018
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Janeiro Lopes Da Silva, J. (author)
The increasing development of information and communication technology is causing fundamental changes to today’s society, changing the communication and interaction of people in their daily lives. For example, geographical distributed co-workers experience collaboration using a broad spectrum of shared workspace systems for communication and...
doctoral thesis 2018
document
Morales Espana, G. (author), Lorca, Álvaro (author), de Weerdt, M.M. (author)

The increasing penetration of uncertain generation such as wind and solar in power systems imposes new challenges to the unit commitment (UC) problem, one of the most critical tasks in power systems operations. The two most common approaches to address these challenges — stochastic and robust optimization — have drawbacks that restrict their...

journal article 2018
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de Jonge, C.J. (author), Kraaikamp, C. (author)

By means of singularisations and insertions in Nakada's α-expansions, which involves the removal of partial quotients 1 while introducing partial quotients with a minus sign, the natural extension of Nakada's continued fraction map Tα is given for (10-2)/3≤α<1. From our construction it follows that Ωα, the domain of the natural extension...

journal article 2018
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Vanham, D. (author), Hoekstra, A (author), Wada, Y (author), Bouraoui, F. (author), de Roo, A. (author), Mekonnen, M. M. (author), van de Bund, W. J. (author), Batelaan, O. (author), Pavelic, P. (author), Bastiaanssen, W.G.M. (author), Kummu, M (author), Rockström, J. (author), Liu, J. (author), Bisselink, B. (author), Ronco, P. (author), Pistocchi, A. (author), Bidoglio, G. (author)

Target 6.4 of the recently adopted Sustainable Development Goals (SDGs) deals with the reduction of water scarcity. To monitor progress towards this target, two indicators are used: Indicator 6.4.1 measuring water use efficiency and 6.4.2 measuring the level of water stress (WS). This paper aims to identify whether the currently proposed...

review 2018
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Salimi, Negin (author), Rezaei, J. (author)

Since research and development (R&D) is the most critical determinant of the productivity, growth and competitive advantage of firms, measuring R&D performance has become the core of attention of R&D managers, and an extensive body of literature has examined and identified different R&D measurements and determinants of R&D...

journal article 2018
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Limberger, Jon (author), Boxem, Thijs (author), Pluymaekers, Maarten (author), Bruhn, D.F. (author), Manzella, Adele (author), Calcagno, Philippe (author), Beekman, Fred (author), Cloetingh, S.A.P.L. (author), van Wees, Jan Diederik (author)

In this paper we present results of a global resource assessment for geothermal energy within deep aquifers for direct heat utilization. Greenhouse heating, spatial heating, and spatial cooling are considered in this assessment. We derive subsurface temperatures from geophysical data and apply a volumetric heat-in-place method to improve...

review 2018
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Ho Huu, V. (author), Hartjes, S. (author), Visser, H.G. (author), Curran, R. (author)

The multi-objective evolutionary algorithm based on decomposition (MOEA/D) has been recognized as a promising method for solving multi-objective optimization problems (MOPs), receiving a lot of attention from researchers in recent years. However, its performance in handling MOPs with complicated Pareto fronts (PFs) is still limited,...

journal article 2018
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de Athayde Costa e Silva, Marsil A. C. (author), Cordeiro Guerrieri, D. C. (author), Cervone, A. (author), Gill, E.K.A. (author)

CubeSats have been extensively used in the past decade as scientific tools, technology demonstrators and for education. Recently, PocketQubes have emerged as an interesting and even smaller alternative to CubeSats. However, both satellite types often lack some key capabilities, such as micropropulsion, in order to further extend the range of...

review 2018
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Peeters, D.M.J. (author), Lozano, Gustavo Gonzalez (author), Abdalla, M.M. (author)

A method to optimise the fibre angle distribution of variable stiffness laminates is proposed. The proposed method integrates a fibre angle retrieval step with a fibre angle optimisation procedure. A multi-level approximation approach is used in combination with the method of successive approximations. First, fibre angle retrieval is done by...

journal article 2018
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van der Meer, J.M. (author)
If secondary hydrocarbon recovery methods, like water flooding, fail because of the occurrence of viscous fingering one can turn to an enhanced oil recovery method (EOR) like the injection of foam. The generation of foam in a porousmedium can be described by a set of partial differential equations with strongly non-linear functions, which impose...
doctoral thesis 2018
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Bojack, A. (author)
This thesis studies in-situ the phase transformations during heat treatment of two advanced steels: a supermartensitic stainless steels (SMSS), on which the main focus of this work is, and Fe-C-Mn-Si steels. A magnetic technique, based on the analysis of saturation magnetization, is utilized as the primary analysing tool. The scientific aim of...
doctoral thesis 2018
document
Mao, S. (author)
This thesis explores a modular HV pulse converter technology with short rise and decay times. A systematic methodology to derive and classify HV architectures based on a modularization level of power building blocks of the HV pulse converter is developed to summarize existing architectures and explore new possible architectures.The optimal...
doctoral thesis 2018
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Akkaya, T. (author)
Many mathematical models, which describe oscillations in elastic structures such as suspension bridges, conveyor belts and elevator cables, can be formulated as initial-boundary value problems for string (wave) equations, or for beam equations. In order to build more durable, elegant and lighter mechanical structures, the undesired vibrations...
doctoral thesis 2018
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Lovrak, M. (author)
Nature is full of life, which is driven by the numerous biochemical processes that occur in living organisms. Many motifs are universal regardless of species, such as enzymatic networks, self-assembly and reaction-diffusion. This work examines the development of novel soft functional materials via self-assembly and reaction-diffusion approaches....
doctoral thesis 2018
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Ding, J. (author)
Nitrogen oxides (NOx) are important air pollutants and play a crucial role in climate change. NOx emissions are important for chemical transport models to simulate and forecast air quality. Up-to-date emission information also helps policymakers to mitigate air pollution. In this thesis, we have focused on providing better NOx emission estimates...
doctoral thesis 2018
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