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de Heer, Owen (author)
Matrix multiplication with the standard algorithm has an algebraic complexity of O(n^3) for n x n matrices, but in 1969 Strassen found another algorithm for multiplying 2 x 2 matrices with which he showed that matrix multiplication can be done with a complexity of O(n^2.81) by applying his algorithm recursively for large...
bachelor thesis 2023
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de Heer, Mathijs (author)
This research provides a recommendation for Sonion, a company specialised in the development and production of hearing aids, on the production of moulds for the injection moulding machine. <br/><br/>The goal was to develop a process that reduces the cost and the time to manufacture an injection mould while maintaining a similar accuracy as in...
master thesis 2023
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de Heer, P. (author), de Visser, C.C. (author), Hoogendoorn, M.L. (author), Jentink, Henk W (author)
In this paper, a new nonlinear control allocation method is presented for a distributed electric propulsion (DEP) aircraft. As the electric propellers can be used actively for control, in addition to the control surfaces, the DEP aircraft is over-actuated. This freedom in control effectors can be exploited with an appropriate control allocation...
conference paper 2023
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de Heer, Izak (author)
Surface corrugations in graphene negatively effect the unique and useful properties of graphene. In order to exploit the special properties of graphene, it is therefore important to understand the phenomenon of wrinkling. In this study, strain engineering was applied to study the flattening of wrinkles in a suspended graphene membrane. Initially...
master thesis 2022
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Barin, N. (author), Balcioglu, Hayri E. (author), de Heer, Iris (author), de Wit, Maurice (author), Lamfers, Martine L.M. (author), van Royen, Martin E. (author), French, Pim J. (author), Accardo, A. (author)
A major obstacle in glioma research is the lack of in vitro models that can retain cellular features of glioma cells in vivo. To overcome this limitation, a 3D-engineered scaffold, fabricated by two-photon polymerization, is developed as a cell culture model system to study patient-derived glioma cells. Scanning electron microscopy, (live...
journal article 2022
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de Heer, Pepijn (author)
To meet the demanding requirements on the environmental impact of aircraft, radically new aircraft concepts need to be developed. Within the NOVAIR project, Royal Netherlands Aerospace Centre (NLR) tests these new concepts on a Scaled flight demonstrator (SFD). Using an SFD allows for testing of dynamic and flight physical behavior of new...
master thesis 2021
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de Heer, Hugo (author)
MalPaCA makes use of unsupervised machine learning to provide malware capability assessment by clustering the temporal behaviour of malware network packet traces. A comparative analysis was performed on various clustering algorithms to determine the best clustering algorithm in terms of network behaviour discovery. The clustering algorithms...
bachelor thesis 2021
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van Alphen, Jos (author), de Heer, Jaap (author), Minkman, E. (author)
This paper evaluates long-term climate change adaptation strategies in the Netherlands and Bangladesh using the Organisation for Economic Co-operation and Development’s (OECD) Principles of Good Water Governance. Deltas face complex challenges, and adequate long-term planning is essential for these regions. However, experience with these long...
journal article 2021
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de Heer, Danny (author)
The weirs in the river Meuse reach their theoretical lifespan. The weirs were built in the early 1930s and now one is faced with a replacement task. Various studies have been carried out in recent years on the future of the weirs in the river Meuse. This concerns research into the entire weir system, different types of weirs and the way in which...
master thesis 2020
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van der Hoek, Alexander (author), de Heer, Danny (author), van Olst, Bart (author), van Leeuwen, Pauline (author), van den Kerkhoff, Roy-Matthieu (author)
Jakarta is heavily subjected to land subsidence. Due to this subsidence, the city is sinking further to under sea level. This has influence on the flood safety, both from an extreme sea event as an extreme rainfall event. The major cause of the subsidence is assumed to be the groundwater extraction, which takes place due to a lack of piped water...
student report 2017
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de Heer, P.W. (author)
conference paper 2014
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de Heer, Piet W. (author)
conference paper 2014
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de Heer, P.W. (author)
book 2011
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de Heer, Piet W. (author)
report 2010
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de Heer, Piet W. (author)
conference paper 2010
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de Heer, J. (author)
doctoral thesis 2008
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de Heer, P.W. (author)
conference paper 2008
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de Heer, Piet W. (author)
conference paper 2008
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de Heer, Piet W. (author)
conference paper 2008
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de Heer, M.A. (author)
master thesis 2008
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