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Geevers, S. (author), Mulder, W.A. (author), van der Vegt, J (author)We present a new accuracy condition for constructing mass-lumped elements. This condition is less restrictive than the one previously used and enabled us to construct new mass-lumped tetrahedral elements for 3D wave propagation modelling. The new degree-2 and degree-3 elements require significantly fewer nodes than previous versions and mass...abstract 2019
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Mulder, G. (author), van Leijen, F.J. (author), Barkmeijer, Jan (author), de Haan, Siebren (author), Hanssen, R.F. (author)InSAR signal delays due to the varying atmospheric refractivity are a potential data source to improve weathermodels [1]. Especially with the launch of the new Sentinel-1 satellites, which increases data coverage, latency andaccessibility, it may become possible to operationalize the assimilation of differential integrated refractivity (DIR...abstract 2017
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- Grobbe, N. (author), Maas, P. (author), Slob, E.C. (author), Mulder, W.A. (author) abstract 2015
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Mulder, G. (author), van Leijen, F.J. (author), Barkmeijer, Jan (author), de Haan, Siebren (author), Hanssen, R.F. (author)The influence of signal delay due to the varying atmospheric refractivity can be significant in individual interferograms. This signal is generally considered to be noise in deformation studies, but it can also potentially be used to improve weather models [1]. This application has an enormous potential, because, contrary to deformation studies,...abstract 2017
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- Levelt, D.F. (author), Mulder, G. (author), van Leijen, F.J. (author), Hanssen, R.F. (author) abstract 2017
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Cupillard, Paul (author), Mulder, W.A. (author), Irakarama, Modeste (author), Mazuyer, Antoine (author), Anquez, Pierre (author)Within the last decade, non-periodic homogenization proved to be an accurate upscaling method for computing smooth equivalent media of elastic models of the earth interior. Doing so, it reveals the seismic anisotropy induced by small-scale structures and it eases the numerical simulation of wave propagation in complex geological settings by...abstract 2019
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- Ruan, J. (author), Masfara, La ODE Marzujriban (author), Ghose, R. (author), Mulder, W.A. (author) abstract 2022
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- Cupillard, Paul (author), Mulder, W.A. (author) abstract 2022
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Ruan, J. (author), Ghose, R. (author), Mulder, W.A. (author)Induced seismicity from a gas-producing region such as Groningen is believed to be caused by reservoir depletion due to long-term gas production. However, because of the complexity and uncertainty regarding the underground structure and composition, it is difficult to quantify the effect on induced seismicity due to gas production. Here we use...abstract 2021
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- van Leeuwen, T.D. (author), Cleij, D. (author), Pool, D.M. (author), Mulder, Max (author), Bülthoff, Heinrich H. (author) abstract 2017
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- van der El, Kasper (author), Pool, D.M. (author), Mulder, Max (author) abstract 2017
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Geevers, Sjoerd (author), van der Vegt, Jaap (author), Mulder, W.A. (author)We present and analyse a Symmetric Interior Penalty Discontinuous Galerkin (SIPDG) method combined with an explicit hybrid Local Time Stepping (LTS) scheme for solving seismic wave problems in heterogeneous anisotropic elastic media. The discontinuous Galerkin method allows for local adjustment of the mesh size and approximation order, and can...abstract 2016
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- van Bergen, J. (author), Nijhuis, S. (author), Mulder, Jan (author), Wijnberg, Kathelijne (author) abstract 2020
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Ruan, J. (author), Ghose, R. (author), Mulder, W.A. (author)Modelling dynamic rupture is essential to correctly describe the process of induced seismicity. Defmod, an open-source finite-element code featuring quasi-static loading, co-seismic volumetric strain, and dynamic rupture, is used to simulate the entire chain of induced seismicity, from pressure evolution due to fluid injection and extraction,...abstract 2020
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Mulder, Tim (author)This thesis develops a method to map the surface of an exoplanet. The problem of exoplanet mapping sounds easy to solve. Take a few photographs of an exoplanet and sew them together to create a map of the surface. The telescope required to do this is far beyond our technological capabilities. However, our current telescopes could allow us to...bachelor thesis 2022
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Hildebrand, Esmee (author), Flinterman, Remi (author), Mulder, Joas (author), Smit, Albert (author)This report documents the design and implementation of Clusus, a cyber range to provide students with a safe isolated environment to learn about cyber security and computer networks. This Bachelor project was proposed by the TU Delft cyber security group. During a two week research phase currently existing solutions were evaluated and...bachelor thesis 2019
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Mulder, Claire (author)Forensic investigations focused on determining clandestine buried weapons, narcotics or even homicide evidence, can be expensive, inefficient and depend greatly on prior information and the tools available. Geophysical tools have potential to improve these investigations, on the ground that they can detect shallow buried objects in a non...bachelor thesis 2019
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Mulder, I. (author)Het is mogelijk om een bal in vijf stukken te verdelen, welke na draaien en verplaatsen weer bij elkaar te zetten zijn in twee ballen identiek aan de eerste. Dit resultaat is in 1924 door Stefan Banach en Alfred Tarski bewezen, en laat zien dat er geen goede volume-afbeelding te defini¨eren is op alle deelverzamelingen van R3. Dit onverwachte...bachelor thesis 2017
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Mulder, Y.T.B. (author), Romijn, J. (author), Verhaert, D.S.M. (author)In this project, a USB DAC was designed. This was done according to a proposal from Flexible Optical B.V. which is located in Rijswijk. This device is used to correct for atmospheric interference in optical measurement systems. The existing DAC is ten years old and needs to be updated to requirements of today. The 'next generation' DAC has been...bachelor thesis 2015
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Mulder, D.J.W. (author)Wondheling gebasseerd op drie diffusie vergelijkingen die de concentratie van groeifactor (MDGF), de concentratie zuurstof en de haarvaten dichtheid aan elkaar koppelen.bachelor thesis 2011