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Candela, T.G.G. (author), Chitu, A.G. (author), Peters, E. (author), Pluymaekers, M.P.D. (author), Hegen, D. (author), Koster, K. (author), Fokker, P.A. (author)Surface movement can be induced by many human subsurface activities: production of natural gas, geothermal heat extraction, ground water extraction, phreatic groundwater level lowering, storage of natural gas and CO2. In this manuscript, we focus on subsidence caused by gas production. While geological interpretations, seismic campaigns and flow...article 2022
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Atanasov, A.N. (author), Alink, M.S.O. (author), Van Vliet, F.E. (author)We present a simple and useful figure of merit (FoM) with which to evaluate the performance of simultaneous-multi-beam (SMB) transmit (TX) antenna arrays. The FoM builds upon the power-aperture product and effective isotropic radiated power for single-beam arrays and extends it to SMB arrays. The FoM is the product of radiated power, antenna...conference paper 2022
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Li Piani, T. (author), Weerheijm, J. (author), Koene, L. (author), Sluys, L.J. (author)A local damage model is proposed for the numerical assessment of the static performance of Adobe masonry components. The model was applied to simulate the experimental behaviour of sundried soil bricks and mud mortar tested in uniaxial compression and bending. Numerical simulations of the model are made mesh objective by means of a rate...article 2019
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Pereira, L.F. (author), Weerheijm, J. (author), Sluys, L.J. (author)Although many aspects of the fracturing process of concrete are now well understood and successfully simulated with various models, it is still very difficult to properly simulate the different failure mechanisms observed in a concrete structure induced by ballistic impact. In this paper, an enhanced version of the effective-rate-dependent...article 2018
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- li Piani, T. (author), Weerheijm, J. (author), Koene, L. (author), Sluys, L.J. (author) conference paper 2018
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van Thienen-Visser, K. (author), Fokker, P.A. (author)The Groningen gas field has shown considerable compaction and subsidence since starting production in the early 1960s. The behaviour is understood from the geomechanical response of the reservoir pressure depletion. By integrating surface movement measurements and modelling, the model parameters can be constrained and understanding of the...article 2017
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Fokker, P.A. (author), van Thienen-Visser, K. (author)Hydrocarbon extraction leads to compaction of the gas reservoir, which is visible on the surface as subsidence. Subsidence measurements therefore give information on the hydrocarbon extraction and can thus be used to better estimate uncertain reservoir parameters. Normally, optical height difference measurements are taken between benchmarks,...article 2016
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- de Waal, J.A. (author), Muntendam-Bos, A.G. (author), van Thienen-Visser, K. (author) conference paper 2016
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Otnes, R. (author), Eastwood, J. (author), Colin, M.E.G.D. (author)Abstract—In the framework of a bilateral Netherlands- Norway defense research cooperation (2014-2017) between The Netherlands Defence Materiel Organisation (DMO NL) and Forsvarets forskningsinstitutt (FFI NO), it has been shown that a compact general-purpose processor board developed for smartphones can be successfully used for real-time...conference paper 2015
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Pruiksma, J.P. (author), Breunese, J.N. (author), van Thienen-Visser, K. (author), de Waal, J.A. (author)This paper presents a new formulation of the Rate Type Compaction Model (RTCM) for sandstone based on the isotach concept. The RTCM was originally developed to explain the loading rate dependent compaction behaviour observed in laboratory test on unconsolidated and consolidated sandstone samples and the delayed subsidence behaviour above...article 2015
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Eelderink, C. (author), Noort, M.W.J. (author), Sozer, N. (author), Koehorst, M. (author), Holst, J.J. (author), Deacon, C.F. (author), Rehfeld, J.F. (author), Poutanen, K. (author), Vonk, R.J. (author), Oudhuis, L. (author), Priebe, M.G. (author)Postprandial high glucose and insulin responses after starchy food consumption, associated with an increased risk of developing several metabolic diseases, could possibly be improved by altering food structure. We investigated the influence of a compact food structure; different wheat products with a similar composition were created using...article 2015
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Wassing, B.B.T. (author)Current methods which are used for seismic hazard analyses of production induced seismicity in The Netherlands are generally based on either empirical relations which link compaction strain and seismic release or simple relations between available fault area and seismic moment release. Physics based understanding of the impact of streb evolution...conference paper 2015
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Dol, H.S. (author), Colin, M.E.G.D. (author), van Walree, P.A. (author), Otnes, R. (author)Abstract—In the framework of a bilateral Netherlands-Norway defense research cooperation (2014-2017) between The Netherlands Defence Materiel Organisation (DMO NL) and Forsvarets forskningsinstitutt (FFI NO), it has been shown that a compact general-purpose processor board developed for smartphones can be successfully used for real-time...conference paper 2015
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Trausel, F. (author), de Jong, A.J. (author), Cuypers, R. (author)Solar energy is capable of supplying enough energy to answer the total demand of energy in dwellings. However, because of the discrepancy between energy supply and energy demand, an efficient way of storing thermal energy is crucial. Thermochemical storage of heat in salt hydrates provides an efficient and compact way of storing solar energy....article 2014
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Agar-Ozbek, A.S. (author), Weerheijm, J. (author), Schlangen, E. (author), van Breugel, K. (author)Porous concrete incorporates a high percentage of meso-size air voids that makes its mechanical characteristics remarkably different from normal concrete. A research project was undertaken to design a special type of porous concrete, that fractures into small fragments when exposed to impact loading while having sufficient static strength, to be...article 2013
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Fokker, P.A. (author), Wassing, B.B.T. (author), van Leijen, F.J. (author), Hanssen, R.F. (author), Nieuwland, D.A. (author)This paper reports a study on the use of satellite radar data to constrain the subsurface model parameters of the Bergermeer gas field. Using PSI (Persistent Scatterer InSAR) technology, ascending and descending data were applied in line-of-sight geometry, i.e., without first unravelling the horizontal and vertical components of the signal. The...conference paper 2013
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van Halsema, D. (author), Otten, M.P.G. (author), Maas, A.P.M. (author), Bolt, R.J. (author), Anitori, L. (author)Synthetic Aperture Radar (SAR) systems are becoming increasingly important sensors in as well the military environment as in the civilian market. In this keynote presentation an overview will be given over more than 2 decades of SAR system∼ and SAR application development at TNO in the Netherlands. The overview will highlight some...conference paper 2011
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Muntendam-Bos, A.G. (author), Fokker, P.A. (author), TNO Bouw en Ondergrond (author)In an attempt to derive more information on the parameters driving compaction, this paper explores the feasibility of a method utilizing data on compaction-induced subsidence. We commence by using a Bayesian inversion scheme to infer the reservoir compaction from subsidence observations. The method's strength is that it incorporates all the...article 2009
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Muntendam-Bos, A.G. (author), Kroon, I.C. (author), Fokker, P.A. (author), TNO Bouw en Ondergrond (author)We introduce a novel, time-dependent inversion scheme for resolving temporal reservoir pressure drop from surface subsidence observations (from leveling or GPS data, InSAR, tiltmeter monitoring) in a single procedure. The theory is able to accommodate both the absence of surface subsidence estimates at sites at one or more epochs as well as the...article 2008
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Beerkens, R.G.C. (author), TNO Industrie en Techniek (author)Conventional industrial glass furnaces show broad glass melt residence time distributions in the melting tanks and average residence times may be up to more than two days for high quality glass products, such as float glass or TV glass, despite the minimum residence times of 8-10 hours (or even less than 4 hours for container glass furnaces)....article 2008
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