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Yamu, Claudia (author), van Nes, A. (author)The United Nations Paris agreement of 2015 highlighted the need for urban planning to prevent and contain urban sprawl so as to reduce trip lengths through an efficient distribution of agglomerations and a well-balanced urban pattern distribution, all while considering travel behavior and accessibility to green areas, services, and facilities on...journal article 2017
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Jin, W. (author), van Ommen, J.R. (author), Kleijn, C.R. (author)Coated nanoparticles have many potential applications; production of large quantities is feasible by atomic layer deposition (ALD) on nanoparticles in a fluidized bed reactor. However, due to the cohesive interparticle forces, nanoparticles form large agglomerates, which influences the coating process. In order to study this influence, the...journal article 2016
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Nemati, M. (author), Kenjeres, S. (author), Urbach, Paul (author), Bhattacharya, N. (author)The scattering of coherent light from a system with underlying flow can be used to yield essential information about dynamics of the process. In the case of pulsatile flow, there is a rapid change in the properties of the speckle images. This can be studied using the standard laser speckle contrast and also the fractality of images. In this...journal article 2016
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Braams, F.P. (author)A highly porous fractal-like nanostructured metal oxide catalyst support with characteristic dimensions of a few nanometers is formed by producing metal nanoparticles in the gas phase, oxidizing them and depositing/sintering them on a nanofiber network. By admixing nanoparticles in the aerosol phase, these can evenly be distributed in the...master thesis 2015
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Overtoom, M.E. (author)Houses were among the first structures that were built, and remain the most common type of building today. The design of housing has been the subject of architecture, while from a psychological point of view the meaning of home has been a major subject of research. These two different viewpoints are combined in this research to provide a tool...master thesis 2013
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Lorenz, W.E. (author)When Benoît Mandelbrot raised the question about the length of Britains coastline in 1967, this was a major step towards formulating the theory of fractals, which also led to a new understanding of irregularity in nature. Since then it has become obvious that fractal geometry is more appropriate for describing complex forms than traditional...conference paper 2013
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De Martin, L. (author), Bouwman, W.G. (author), Van Ommen, J.R. (author)recent years, the interest in fluidization as a mean to process nanoparticles is strongly increasing. Due to the small size of the nanoparticles, which makes van der Waals forces predominate, they do not fluidize as single particles but as agglomerates. Various researchers using settling experiments and bed expansion measurements conclude that...conference paper 2013
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- Don, H. (author) doctoral thesis 2013
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Gillissen, J.J.J. (author), Hoving, J.P. (author)Pipe flow experiments show that turbulent drag reduction in plug-flow of concentrated suspensions of macroscopic fibers is a self-similar function of the wall shear stress over the fiber network yield stress. We model the experimental observations, by assuming a central fiber network plug, whose radius is determined by the yield stress....journal article 2012
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- Khanbareh, H. (author) master thesis 2011
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Rosso, M. (author), Van Steijn, V. (author), De Smet, L.C.P.M. (author), Sudhölter, E.J.R. (author), Kleijn, C.R. (author), Kreutzer, M.T. (author)A self-similar reaction front develops in reactive ion etching when the ions penetrate channels of shallow height h. This relates to the patterning of microchannels using a single-step etching and bonding, as described by Rhee et al. [Lab Chip 5, 102 (2005)] . Experimentally, we report that the front location scales as xf ? ht1/2 and the width...journal article 2011
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Dekking, M. (author), Simon, K. (author), Székely, B. (author)In this paper, we consider a family of random Cantor sets on the line and consider the question of whether the condition that the sum of the Hausdorff dimensions is larger than one implies the existence of interior points in the difference set of two independent copies. We give a new and complete proof that this is the case for the random Cantor...journal article 2011
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Khoshelham, K. (author), Altundag, D. (author)The application of terrestrial laser scanning to the study of rock surface roughness faces a major challenge: the inherent range imprecision makes the extraction of roughness parameters difficult. In practice, when roughness is in millimeter scale it is often lost in the range measurement noise. The parameters extracted from the data, therefore,...conference paper 2010
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Dekking, M. (author), Don, H. (author)Let F1 and F2 be independent copies of one-dimensional correlated fractal percolation, with almost sure Hausdorff dimensions dimH(F1) and dimH(F2). Consider the following question: does dimH(F1) + dimH(F2) > 1 imply that their algebraic difference F1 ? F2 will contain an interval? The well known Palis conjecture states that ‘generically’ this...journal article 2009
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Van Turnhout, M. (author)A major problem in optical system design is that the optical merit function landscape is usually very complicated, especially for complex design problems where many minima are present. Finding good new local minima is then a difficult task. We show however that a certain degree of order is present in the optical design space, which is best...doctoral thesis 2009
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Christensen, D.O. (author)The conversion in bubbling fluidized bed reactors is suppressed because the interphase mass transfer and gas-solid contact in bubbling fluidized bed reactors are often poor. Most of the gas is present in the form of bubbles, which have low surface-to-volume ratios and are nearly devoid of catalyst particles. The chaotic behaviour of the bubbles...doctoral thesis 2008
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Van Turnhout, M. (author), Bociort, F. (author)Local optimization algorithms, when they are optimized only for speed, have in certain situations an unpredictable behavior: starting points very close to each other lead after optimization to different minima. In these cases, the sets of points, which, when chosen as starting points for local optimization, lead to the same minimum (the so...conference paper 2007
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Maggi, F. (author)While the fractal dimension of suspended flocs of cohesive sediment is known to vary with the shear rate, electrochemical properties of the sediment and environment, geometrical restructuring, and presence of organic matter, experimental data presented in this work suggest changes in fractal dimension also during floc genesis at constant...journal article 2007
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Maggi, F. (author)The study of cluster format ion is common in many fields of science and technology (aerosols, colloidal suspensions, hetero-disperse particulate systems in general, growth processes far from equilibrium, etc.). The term "cluster" is a general word indicating an object consisting of a set of elementary unit es organised with a certain structure....report 2003
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Van Prooijen, B.C. (author), Uijttewaal, W.S.J. (author)The development of large coherent structures in a shallow mixing layer is analyzed. The results are validated with experimental data obtained from particle tracking velocimetry. The mean flow field is modeled using the self-similarity of the velocity profiles. The characteristic features of the down-stream development of a shallow mixing layer...journal article 2002