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Bakker, M. (author), Vreeburg, J.H.G. (author), Van der Roer, M. (author), Sperber, V. (author)An algorithm which compares measured and predicted water demands to detect pipe bursts was developed and tested on three data sets of water demand and reported pipe bursts of three years. The algorithm proved to be able to detect bursts where the water loss exceeds 30% of the average water demand in the area. The accuracy depends on the...conference paper 2012
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Bakker, M.C.M. (author)Automated optic inspection of concrete aggregates for pollutants (e.g. wood, plastics, gypsum and brick) is required to establish the suitability for reuse in new concrete products. Inspection is more efficient when directly sampling the materials on the conveyor belt instead of feeding them in a sampled stream to the sensor system. However,...conference paper 2017
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Sanaee, S.A. (author), Bakker, M.C.M. (author)Ultrasound imaging techniques are proposed for measuring the shape and thickness of immersed waste particles (10-20 mm size) using a linear sensor array from a fixed position. For these purposes both the front and back surface of a particle needs to be reconstructed. Raw ultrasound pulse-echo and plane wave datasets and different imaging...conference paper 2012
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Fakhredin, F. (author), Bakker, C.A. (author), Geraedts, J.M.P. (author)Recycling crosses the fields of resource engineering, metallurgy and materials sciences, and designers cannot be expected to master all these knowledge areas. However, designers need to have access to this knowledge in a simple and clear form, to be able to design products that allow an optimal recovery with minimum quality losses. This is...conference paper 2014
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Bakker, B. (author), Van de Velde, D.M. (author)All suburban/regional bus services around Amsterdam City have been submitted to competitive tendering. This is done under a very innovative form of revenue-based contract that can be classified as a ‘super incentive’ contract. Payments to operators (‘subsidies’) are based on realised passenger revenues and no longer on the costs of supplying...conference paper 2009
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Peck, D.P. (author), Bakker, C.A. (author), Diederen, A. (author)Historians understand the important role that access to critical raw materials has played in the development of civilizations, however access to materials has regularly led to distrust and conflict. Near future material scarcity scenarios appear to be severe and could include a mix of price volatility, supply disruptions and geopolitical...conference paper 2010
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Nilstad Pettersen, I. (author), Bakker, C.A. (author)European ecodesign policy is currently bringing material resource efficiency into focus. This paper explores how and to what extent policy addresses sustainable consumption-related issues, and what the consequences may be for the future role of design in supporting sustainable everyday consumption. How will policy help and hinder designers and...conference paper 2013
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Ranjha, Sayra (author), Hoveling, V.T. (author), van Gelderen, B.E. (author), van de Bult, F.J. (author), den Ouden-van der Horst, D. (author), Smet, C.O. (author), Roelvink, M.A.T. (author), Bakker, I.P. (author)We present our short series of interactive animations on directional derivatives and level curves. This visualisation was developed for students of first-year mathematics courses at the Delft University of Technology. The interactive animation is an animated video that can be interacted with while it is paused or playing. The user can change,...conference paper 2021
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Ökmen, Ö. (author), Bosch-Rekveldt, M.G.C. (author), Bakker, H.L.M. (author)Scheduling of a construction project using an activity network can be done using the Critical Path Method (CPM). CPM scheduling, since it was first developed in the USA in 1950’s, has been widely applied in various sectors including the construction sector. CPM, however, is incapable of reflecting the influence of uncertainty on schedules and...conference paper 2021
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van der Loop, Han (author), Bakker, Peter (author), Savelberg, Fons (author), Kouwenhoven, M.L.A. (author), Helder, Eveline (author)Objective<br/>Until 2016, the KiM Netherlands Institute for Transport Policy Research annually explained the development of train passenger kilometres over the preceding ten years by using the national development of its drivers (such as population growth and train kilometers), as well as the elasticities of demand for those drivers. Since some...conference paper 2018
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van Dam, S.S. (author), Bakker, C.A. (author), Hazenoot, Thomas (author), Mihelič, Aleš (author)This paper presents the result of a co-creation and context mapping study amongst seventeen washing machines users. The users had widely varying experiences with products offered through alternative ownership models, including three who were active users of a washing machine with pay-per-use or monthly subscription model. Through the co-creation...conference paper 2019
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Ökmen, Ö. (author), Bosch-Rekveldt, M.G.C. (author), Bakker, H.L.M. (author)Scheduling of a construction project can be done by using the Critical Path Method (CPM) in case the project is composed of interrelated activities that can be combined through a network. Given uncertainties nowadays and the related need for project schedule adaptations, the question is raised whether and how “traditional” CPM based schedules...conference paper 2020
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Houtzager, Daan (author), Hofland, Bas (author), Caldera, Ganga (author), van der Lem, Cock (author), van Gent, M.R.A. (author), Bakker, Pieter (author), Antonini, A. (author)Randomly placed breakwater armour units under wave loading can sometimes start rocking, which can lead to breakage of armour units. This failure mechanism can especially become important for single layer randomly placed armour units for which full displacement of units will only happen at higher stability numbers compared to older types of units...conference paper 2023
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- van Dam, S.S. (author), Bakker, C.A. (author), van Hal, J.D.M. (author) conference paper 2009
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Bakker, M.C.M. (author), Xia, H. (author)Optical inspection of a thick layer of granules for foreign particles does not directly reveal their true number and the more so if the layer is not homogenous. This raises questions such as “how do I know if the layer is homogenous?” and “what is the relation between the observable particles and the true number?” In this work a theory is...conference paper 2016
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van Dam, S.S. (author), Buiter, J.C. (author), Bakker, C.A. (author)An ever-increasing body of research explores the effectiveness of Home Energy Management systems (HEMS) in achieving energy savings. To date, however, the overall life cycle impact of the HEMS itself has not been taken into account. Thus, no assessment has been made whether the amount of energy saved (esaved) outweighs the energy needed for...conference paper 2012
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Bakker, M.C.M. (author)Automated optic inspection of concrete aggregates for pollutants (e.g. wood, plastics, gypsum and brick) is required to establish the suitability for reuse in new concrete products. Inspection is more efficient when directly sampling the materials on the conveyor belt instead of feeding them in a sampled stream to the sensor system. However,...conference paper 2017
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van Dam, S.S. (author), Bakker, C.A. (author), de Pauw, I.C. (author), van der Grinten, B. (author)The Circular Pathfinder tool, which provides guidance to companies looking for appropriate circular design strategies, was developed based on OEM (original equipment manufacturer) case studies. Ease of use was one of the main requirements during development of the tool, resulting in a software-based guide that asks a maximum of ten product...conference paper 2017
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Ezzahiri, Sidi Mohamed (author), Nasif, Badia S. (author), Krieg, Jan (author), Bakker, Anco (author), Infante Ferreira, C.A. (author)The search for renewable energy sources is a wide area in which significant progress is still expected. This paper focuses on an energy system that uses Fresnel lenses to concentrate sunlight on a tubing system to heat up the working fluid. Fresnel lenses are lighter, thinner and cheaper to build than ordinary lenses. The model is designed to be...conference paper 2017
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Peck, David (author), Bakker, C.A. (author), Kandachar, P.V. (author), de Rijk, T. (author)Materials are important in economies, business, innovation activity and products, and they have quickly become essential to maintain and improve our quality of life. The world faces problems concerning material supply, but these concerns are not translated into product design activity, even though history shows that product design policy can...conference paper 2017