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Bakker, C.A. (author), van Dam, S.S. (author), de Pauw, I.C. (author), van der Grinten, B. (author), Asif, Farazee (author)
By combining the lessons learned from the four ResCoM industrial cases, a generic methodology was developed for other companies that want to engage in the development of multiple-lifecycle products. This report describes a stepwise approach for developing such products. The approach includes a suite of design tools as well as a practical case...
report 2017
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Sauerwein, M. (author), Bakker, C.A. (author), Balkenende, A.R. (author)
Circular product design is a relatively new approach to design suitable strategies to realize circular products. Additive manufacturing (AM) is seen as a promising enabling production process. It has digital and additive characteristics, which makes AM different from conventional production techniques. However, it is yet unclear how this...
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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Sumter, Deborah (author), Bakker, C.A. (author), Balkenende, A.R. (author)
This paper examines the role of product designers in the transition towards the circular economy. Both scientific and grey literature show remarkable optimism when it comes to role strategic and coordinating role designers could play in this transition process. However, there has been little examination of the actual role and influence designers...
conference paper 2017
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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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Fienen, Michael N. (author), Bakker, M. (author)
In the past decade, difficulties encountered in reproducing the results of a cancer study at Duke University resulted in a scandal and an investigation which concluded that tools used for data management, analysis, and modeling were inappropriate for the documentation of the study, let alone the reproduction of the results. New protocols were...
journal article 2016
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Merkus, Sander (author), Willems, Thijs (author), Schipper, Danny (author), van Marrewijk, Alfons (author), Koppenjan, Joop (author), Veenswijk, Marcel (author), Bakker, H.L.M. (author)
This paper studies the ways in which members of inter-organizational teams collectively make sense of unexpected events and how they decide upon engaging in action. Frequently, ambiguity dominates such change processes aimed to create common understanding. Using the notion of the duality of intrinsic and constructed ambiguity, a detailed...
journal article 2016
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Bocken, N.M.P. (author), de Pauw, I.C. (author), Bakker, C.A. (author), van der Grinten, B. (author)
The transition within business from a linear to a circular economy brings with it a range of practical challenges for companies. The following question is addressed: What are the product design and business model strategies for<br/>companies that want to move to a circular economy model? This paper develops a framework of strategies to guide...
journal article 2016
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Bakker, M. (author)
The loading efficiency (sometimes called the tidal efficiency) is often neglected when simulating the head response in an aquifer to water level changes in lakes and streams. This is not appropriate when the lake or stream only partially penetrates the aquifer. In such cases, the aquifer extends below the lake or stream and is hydraulically...
journal article 2016
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van Ginkel, M. (author), des Tombe, B (author), Olsthoorn, T.N. (author), Bakker, M. (author)
Regular aquifer storage recovery, ASR, is often not feasible for small-scale storage in brackish or saline aquifers because fresh water floats to the top of the aquifer where it is unrecoverable. Flow barriers that partially penetrate a brackish or saline aquifer prevent a stored volume of fresh water from expanding sideways, thus increasing...
journal article 2016
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Zhang, Dong (author), Verhees, Wiljan (author), Dörenkämper, Maarten (author), Qiu, Weiming (author), Bakker, N.J. (author), Gutjahr, Astrid (author), Veenstra, Sjoerd (author), Gehlhaar, Robert (author), Paetzold, Ulrich W. (author), Soppe, Wim (author), Romijn, Ingrid (author), Geerligs, LJ (author), Aernouts, Tom (author), Weeber, A.W. (author)
The perovskite solar cell is considered a promising candidate as the top cell for high-efficiency tandem devices with crystalline silicon (c-Si) bottom cells, contributing to the cost reduction of photovoltaic energy. In this contribution, a simulation method, involving optical and electrical modelling, is established to calculate the...
journal article 2016
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Weelden, E (author), Mugge, R. (author), Bakker, C.A. (author)
In the transition towards a circular economy, refurbishment can be applied to regain value from used products, and to reduce waste. Refurbishment is a process in which a professional company collects and restores used products in order to resell these products to new consumers. Building on insights from the remanufacturing literature, this...
journal article 2016
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Obergfell, C.C.A. (author), Bakker, M. (author), Maas, Kees (author)
The flood-wave method is implemented within the framework of time-series analysis to estimate aquifer parameters for use in a groundwater model. The resulting extended flood-wave method is applicable to situations where groundwater fluctuations are affected significantly by time-varying precipitation and evaporation. Response functions for time...
journal article 2016
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Shao, W. (author), Bogaard, T.A. (author), Su, Y. (author), Bakker, M. (author)
In this study, a 1D hydro-mechanical model was developed by coupling a dual-permeability model with an infinite slope stability approach to investigate the influence of preferential flow on pressure propagation and slope stability. The dual-permeability model used two modified Darcy-Richards equations to simultaneously simulate the matrix flow...
journal article 2016
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des Tombe, B (author), Bakker, M. (author), Schaars, F (author), van der Made, KJ (author), Calje, R (author), Borst, L. (author)
Targeted provisional session N°8.01 The seasonal variation in residence times is determined in a managed aquifer recharge system using a passive heat tracer test. The managed aquifer recharge system consists of a sequence of alternating elongated recharge basins and rows of recovery wells. The temperature of both the water in the recharge basin...
abstract 2016
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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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Di Maio, F. (author), Rem, P.C. (author), Lotfi, Somayeh (author), Bakker, M.C.M. (author), Xia, H. (author), Hu, M. (author)
other 2016
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Blom, H.A.P. (author), Bakker, GJ (author)
conference paper 2016
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Stoop, A.H. (author), Bakker, T.W. (author), Kramer, H.J.M. (author)
In several studies the beneficial influence of pre-treatment of waste activated sludge with cavitation on the biogas production was demonstrated. It is however, still not fully certain whether this effect should be mainly contributed to an increase in conversion rate of organics into biogas by anaerobic bacteria, and how much cavitation...
conference paper 2015
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Xia, H. (author), Bakker, M.C.M. (author)
This work investigates the ability of LIBS to produce quality spectra from small particles of concrete demolition waste using single-shot spectra collected in open air. The 2–8?mm materials are rounded river gravel, green glass shards, and plastic flakes. Considered are focal length, air, moisture, laser energy, and laser incidence angle (LIA)....
journal article 2015
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