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Florentie, L. (author), Van Zuijlen, A.H. (author), Bijl, H. (author)This paper is the starting point for the development of a multi-fidelity modeling approach for vortex generators (VG) arrays, where a fully resolved VG model will be coupled with an approximate model in order to improve both accuracy and flexibility without increasing the required computational cost. As a first step thereto, an analysis of the...conference paper 2014
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Pruyt, E. (author), Cunningham, S. (author), Kwakkel, J.H. (author), De Bruijn, J.A. (author)Human-computer and human-system interaction has already received extensive attention from HCI research communities, yet there are a number of issues that has not been addressed so far. In this paper we propose a novel vision on future human-system interaction that is governed by the principle of affordances and facilitated by cyber physical...conference paper 2014
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Wang, D. (author), Abdalla, M.M. (author)There is a renewed interest in grid-stiffened composite structures; they are not only competitive with conventional stiffened constructions and sandwich shells in terms of weight but also enjoy superior damage tolerance properties. In this paper, both global and local structural instabilities are investigated for grid-stiffened composite panels...conference paper 2014
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Picelli, R. (author), Van Dijk, R. (author), Vicente, W.M. (author), Pavanello, R. (author), Langelaar, M. (author), Van Keuen, A. (author)This paper presents an evolutionary topology optimization method for applications in design of completely submerged buoyant devices with design-dependent fluid pressure loading. This type of structures aid rig installations and pipeline transportation in all water depths in offshore structural engineering. The proposed optimization method seeks...conference paper 2014
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Srivatsav, N. (author), Jaxa-Rozen, M. (author), Van Staveren, R. (author)This draft paper describes the preliminary outcomes of a model-based investigation of longterm strategies to reduce the impacts of coastal flooding in Bangladesh. Specifically, a system dynamics model was constructed to simulate the effect of flood mitigation methods on the population, rural economy, housing and welfare of Bangladeshis in the...conference paper 2014
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Pruyt, E. (author)Although SD modeling is sometimes called theory-rich data-poor modeling, it does not mean SD modeling should per definition be data-poor. SD software packages allow one to get data from, and write simulation runs to, databases. Moreover, data is also sometimes used in SD to calibrate parameters or bootstrap parameter ranges. But more could and...conference paper 2014
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Auping, W.L. (author), De Jong, S. (author), Pruyt, E. (author), Kwakkel, J.H. (author)The US’ shale gas revolution, a spectacular increase in natural gas extraction from previously unconventional sources, has led to considerable lower gas prices in North America. This study focusses on consequences of the shale gas revolution on state stability of traditional oil and gas exporting countries in the vicinity of the EU. For this...conference paper 2014
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Papachristos, G. (author), Van de Kaa, G. (author)There is considerable literature on format competition with several review articles establishing lists of factors that are thought to apply broadly in such contexts. However, the literature is not unequivocal regarding some factors that apparently can have a reinforcing or balancing effect on format adoption and dominance. This paper attempts to...conference paper 2014
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Clifford Holmes, J.K. (author), Slinger, J.H. (author), Musango, J.K. (author), Brent, A.C. (author), Palmer, C.G. (author)This paper explores the challenges faced by small municipalities in providing water services in a developing-world context of increasing urban demand. The paper uses a case study of the Sundays River Valley Municipality (SRVM) in South Africa. The municipality faces multiple dilemmas in reconciling its available water supply with growing demand...conference paper 2014
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D'Hont, F. (author), Slinger, J.H. (author), Goessen, P. (author)As quantitative modelling can be used to build stakeholder understanding for management decisions, and can help build consensus (Stave, 2003), a system dynamics modelling study of the abiotic dynamics of an archetypical small estuary, the Slufter in the Netherlands is formulated. The model is used in combination with an analysis of stakeholders’...conference paper 2014
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Zhang, C. (author), Qin, C. (author)This research is conducted to explore the growing trend of private vehicles in Beijing, China, in the coming 25 years using the system dynamics (SD) method. The vensim software is used to build the SD model and do simulations. First, the paper introduces the background of the private vehicles in Beijing and analyzes the issues of traffic...conference paper 2014
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Kuipers, J. (author)A study was performed by the author on formal analysis of uncertain non-linear systems in the context of System Dynamics (SD). The objective of this study was to develop a more insightful method to classify model behaviour for exploratory modelling. The long term vision of this study is more efficient, more exhaustive and more insightful model...conference paper 2014
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Maher, G.D. (author), Hulshoff, S.J. (author)The Variational Germano Identity [1, 2] is used to optimize the coefficients of residual-based subgrid-scale models that arise from the application of a Variational Multiscale Method [3, 4]. It is demonstrated that numerical iterative methods can be used to solve the Germano relations to obtain values for the parameters of subgrid-scale models...conference paper 2014
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Kwakkel, J.H. (author), Auping, W.L. (author), Pruyt, E. (author)In many public policy issues diverging understandings of the system can be encountered. These diverging understandings can reside in the mental models of the different actors involved, or even be codified into structurally different models of the system. For an analyst it can be of great use to get insight into how and under what conditions the...conference paper 2014
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Cheng, L. (author), Mattei, S. (author), Fick, P.W. (author), Hulshoff, S.J. (author)A semi-continuous formulation is introduced for finding bases which minimise the error in a specific output functional of a reduced-order model. The formulation is advantageous in that it can be easily applied to nonlinear problems and functionals. A general description of the approach is given, then explicit formulations are derived for the...conference paper 2014
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Jiao, F. (author), Mohles, V. (author), Miroux, A.G. (author), Bollmann, C. (author)Microstructure and microchemistry evolution during hot deformation and subsequent annealing of a commercial Al-Mg-Si alloy were experimentally investigated using electron backscatter diffraction (EBSD) and SEM. Meanwhile, a through-process model framework consisting of the deformation model GIA-3IVM+ and the recrystallization (RX) model CORe was...conference paper 2014
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Moorlag, R. (author), Auping, W.L. (author), Pruyt, E. (author)Now that conventional gas resources are rapidly declining in many industrialised regions, national governments are considering the exploration and production of unconventional resources, with shale gas in particular. Large-scale development of these resources could significantly lower import dependency of the gas supply of many countries. The...conference paper 2014
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Auping, W.L. (author)The copper case is often used as an example in resource depletion studies. Despite these studies, several profound uncertainties remain in the system. One of these uncertainties is the distribution of copper grades in the lithosphere. The Skinner thesis promotes the idea that copper grades may be distributed with a bimodal distribution instead...conference paper 2014
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- Kwakkel, J.H. (author), Auping, W.L. (author), Pruyt, E. (author) conference paper 2014
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Yang, Q. (author), Zhenpeng, Z. (author)The increasing energy demand in China due to urbanization has made the study of different energy policies in big cities a crucial topic of discussion. This is a complex problem since the electricity market is a multi-actor system where various actors may have a great influence on the main issue we are focusing on. In order to reduce the energy...conference paper 2014