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Reitsema, A.D. (author), Lukovic, M. (author), Grunewald, S. (author), Hordijk, D.A. (author)Most of the bridges and viaducts in the Netherlands were built in the sixties and seventies of the last century, and an increasing number of them will have to be replaced due to technical or functional reasons. The Netherlands is not an exception, many industrialized countries will face a similar replacement task in the near future. With the...journal article 2020
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Urso, A. (author), Chen, Y. (author), Staszewski, R.B. (author), Dijkhuis, Johan F. (author), Stanzione, Stefano (author), Liu, Y. (author), Serdijn, W.A. (author), Babaie, M. (author)In this paper, we propose a new scheme to directly power a 4.9-5.6GHz LC oscillator from a recursive switched-capacitor DC-DC converter. A finite-state machine is integrated to automatically adjust the conversion ratio and switching frequency of the converter such that its DC output voltage is within ±5% of the desired 1V across input voltage...journal article 2020
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Frijns, Ruben (author)In contrast with other Dutch rivers parts, human measures in the upstream part of the River Meuse did not mainly focus on discharging surplus water, but on retaining water in dry periods. Almost 100 years ago seven weirs were constructed in the River Meuse to enable transport of coals. The structures reach, due to concrete degradation, the end...master thesis 2019
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Noë, tom (author)Children missing an upper limb face a wide range of issues. Besides the difficulties adult prosthetic users face, such as unsatisfactory function, comfort, and appearance, children also have to deal with the challenges associated with growth. The goal of this thesis was to design an appealing solution for these growing children with an upper...master thesis 2019
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van den Boomen, M. (author), Spaan, M.T.J. (author), Schoenmaker, R. (author), Wolfert, A.R.M. (author)Managerial flexibility in infrastructure investment and replacement decisions adds value. Real options analysis (ROA) captures this value under uncertain market prices. The concept of ROA is that future unfavourable payoffs can be deferred as soon as more information about market prices becomes available. The popularity of ROA is seen in a...journal article 2019
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van den Boomen, M. (author), Leontaris, G. (author), Wolfert, A.R.M. (author)Ageing public infrastructure assets necessitate economic replacement analysis. A common replacement problem concerns an existing asset challenged by a replacement option. Classic techniques obtained from the domain of engineering economics are the mainstream approach to replacement optimization in practice. However, the validity of these classic...journal article 2019
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Shang, Y. (author), van den Boomen, M. (author), de Man, Amy (author), Wolfert, A.R.M. (author)Reliability-based life cycle costing analysis (LCCA) supports optimized decisions on capital and operational expenditures for engineering asset management. In addition, it allows investigation of the impact of maintenance decisions on designing the service life of assets. The application of reliability-based LCCA in railway practice is...journal article 2019
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de Nie, Ruben (author), Leontaris, G. (author), Hoogendoorn, Don (author), Wolfert, A.R.M. (author)Installation and maintenance operations of offshore assets are impacted by local environmental conditions such as wave height and period, wind speed and current velocity. These parameters are substantially of influence for the asset planning (time and costs) given the uncertainty of operational windows. In this article, a method is proposed to...journal article 2019
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Shang, Yue (author)Asset degradation and maintenance strategies are driving factors that cause the variation in life cycle cost (LCC) of infrastructure assets. In the railway industry, several researchers have analyzed the impact of the uncertainty on LCC, but the emphasis was laid on traditional ballasted tracks. Another type of track structure, embedded rail...master thesis 2018
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Nijssen, J.P.A. (author), Kempenaar, Anton (author), Diepeveen, Niels (author)The DOT concept for offshore wind energy is a seawater hydraulic network where turbines are directly coupled to a centralized hydro-power platform. The essential missing component is a low-speed hydraulic pump that uses seawater as its hydraulic medium. This low speed hydraulic pump is currently being designed and tested by DOT, where novel...conference paper 2018
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van den Boomen, M. (author), van den Berg, P.L. (author), Wolfert, A.R.M. (author)In the next decades, many public infrastructure assets will reach the end of their life that they were originally designed for. Replacement costs are high, and therefore increasing effort is put into lifetime-extending maintenance, including major overhauls and renovations. A key question is whether the investments in lifetime-extending...journal article 2018
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Koperdraat, Bo (author)This report is the result of a graduation project at the TU Delft, Faculty of Industrial Design Engineering. The project was done in collaboration with the Reinier de Graaf Gasthuis. The implantation of a total knee replacement (TKR) is one of the most successful operations in the field of orthopedic surgery. Unfortunately, in 0.6-2.5% of the...master thesis 2017
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Stap, Merijn (author)Bridges are a crucial part of the dense Dutch highway network. Almost 50% of the current bridges are built between 1960 and 1980 for an intended service life of 50 years and thus they might reach the end of their lifetime in the near future. This strongly indicates that a large challenge can be expected regarding infrastructural replacement.<br/...master thesis 2017
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Klap, Paulien (author)When people experience pain, discomfort or motion limitation in their hip joint they can get a hip implant. This implant improves the movement and decreases the pain and discomfort. Due to several reasons such an implant needs revision after ten to fifteen years. This revision surgery is a long and invasive surgery. When an implant is fixated...master thesis 2017
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van den Boomen, M. (author), Schoenmaker, R. (author), Wolfert, A.R.M. (author)Civil infrastructure assets, such as roads, locks, bridges, treatment plants and storm surge barriers, are often characterised by long service lives and corresponding technical life cycles. When life cycles are long, the time value of money plays a role in asset management decision-making on capital investments and operation and maintenance...journal article 2017
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Sun, Yimin (author), Verschuur, D.J. (author), Luo, Yi (author)Near-surface problem is a common challenge faced by land seismic data processing, where often, due to near-surface anomalies, events of interest are obscured. One method to handle this challenge is near-surface layer replacement, which is a wavefield reconstruction process based on downward wavefield extrapolation with the near-surface...journal article 2017
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Sadeghi Tehrani, F. (author), Thi Viet Phuong, N. (author), Brinkgreve, R.B.J. (author), van Tol, A.F. (author)In this study, installation of jacked piles in sand is simulated using Press-Replace Method (PRM) and Material Point Method (MPM) and the results are compared together. This comparison is important because a realistic and yet efficient simulation of installation of jacked piles is an appealing step towards the design and analysis of this type of...journal article 2016
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Lamoré, R. (author)This thesis report presents an investigation of a soil improvement technique that is being executed for a Van Oord project in Kuwait. The soil is improved by the use of a column supported embankment, consisting of sand columns installed in a soft soil layer and a sand platform. The efficiency of this method is defined in terms of stress transfer...master thesis 2016
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Van Wolfswinkel, G. (author)Introduction. Aseptic loosening is indicated as the main cause of knee implant failure. Despite all currently used techniques, it remains challenging to diagnose an aseptic loose knee implant. A promising technique to reveal aseptic loose related implant motions is inducible displacement (ID). ID measurements are used to detect implant motion...master thesis 2016
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Krintiras, G. (author)To meet the increasing need for protein-rich food of an ever growing population, plant-based proteins are being utilized in meat products as replacements for animal-based proteins. Legumes such as soy can serve as an alternative protein source, by featuring both high protein content (36%) and protein functionality (gelation). Nowadays various...doctoral thesis 2016