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Koornneef, H. (author), Verhagen, W.J.C. (author), Curran, R. (author)The use of documentation for task support in aircraft line maintenance is still mostly paper-based, which is slow, burdensome and prone to error. This paper provides an overview of the issues associated with the use of paper-based documentation in aircraft line maintenance and describes the development of a novel concept for contextualised...journal article 2017
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Wognum, Nel (author), Verhagen, W.J.C. (author), Stjepandic, J (author)The system concept is a widely-used concept in research and practice. Already in the 50s of the previous century, a community was created to investigate interrelationships between domains and create a theory surpassing and comparing domains. The General Systems Theory (GST) community has tried to come up with...conference paper 2017
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Koornneef, H. (author), Verhagen, W.J.C. (author), Curran, R. (author)The aircraft dispatch decision is a complex analysis based on many factors related to airworthiness regulations, aircraft health status, resource availability at current and future stop(s) and operational preferences of the operator. Within the turnaround time (TAT) a decision has to be made whether the aircraft can return to service, defects...conference paper 2017
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Verhagen, W.J.C. (author), Curran, R. (author), de Boer, L.W.M. (author)Costs associated with unscheduled and preventive maintenance can contribute significantly to an airline's expenditure. Reliability analysis can help to identify and plan for maintenance events. Reliability analysis in industry is often limited to statistically based approaches that incorporate failure times as...conference paper 2017
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Parappurath, N. (author), Alpeggiani, F. (author), Kuipers, L. (author), Verhagen, E. (author)We develop a theoretical formalism which explains asymmetric transmission (AT) in chiral resonators from their eigenmodes. We derive a fundamental limit for AT and propose the design of a chiral photonic crystal offering 84% AT.conference paper 2017
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Harihar, S. (author), Verhagen, H.J. (author)Mangroves have proved to be an asset to coastlines owing to their various advantages in terms of coastal protection and stability. Along tropical coastlines, as mangrove tracts recede and threats of coastal erosion mount, mangrove rehabilitation projects are being seriously contemplated. The design of such projects, however, is in an incipient...journal article 2017
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Newcamp, Jeffrey (author), Verhagen, W.J.C. (author), Curran, R. (author)It is well known that aircraft fleets are aging alongside rising operations and support costs. Logisticians and fleet managers who better understand the milestones and timeline of an aging fleet can recognise potential savings. This paper outlines generalised milestones germane to military aircraft fleets and then discusses the causes that lead...journal article 2017
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Newcamp, Jeffrey (author), Verhagen, W.J.C. (author), Curran, R. (author)Individual aircraft tracking data can be used by aircraft fleet managers to detect patterns in historical usage as a means to aid aging aircraft decision-making. This work tackles two aspects of applying these tracking data: investigating retirement patterns and assessing how base assignment can impact usage. The A-10, C-17 and F-35 acquisition...conference paper 2017
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Guillaume Carpentier, G. (author), Piero Silva, P. (author), Allsop, W (author), Mouazé, D. (author), Verhagen, H.J. (author), Gautier-Chevreux, L. (author), Bagieu, M. (author)This paper describes a unique design project devised to teach and apply technical skills in port design, but also in the practical cooperation between students in a realistic design project. The 4-week long project now involves students of up to 19 nationalities from 7-10 universities, and has been based each year on real design projects....conference paper 2017
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Haagmans, G. G. (author), Verhagen, S. (author), Voûte, R.L. (author), Verbree, E. (author)Since GPS tends to fail for indoor positioning purposes, alternative methods like indoor positioning systems (IPS) based on Bluetooth low energy (BLE) are developing rapidly. Generally, IPS are deployed in environments covered with obstacles such as furniture, walls, people and electronics influencing the signal propagation. The major factor...conference paper 2017
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Dhanisetty, V.S.V. (author), Verhagen, W.J.C. (author), Curran, R. (author)Decision making in daily maintenance requires consideration of multiple factors. The importance of each of the factors fluctuates depending on the repair scenario and the needs of the maintainer. In order to include the prioritisation of multiple criteria, a weighted decision making model is developed. The model evaluates all repair options and...conference paper 2017
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Hou, Y. (author), Verhagen, S. (author), Wu, J (author)Ambiguity Resolution (AR) plays a vital role in precise GNSS positioning. Correctly-fixed integer ambiguities can significantly improve the positioning solution, while incorrectly-fixed integer ambiguities can bring large positioning errors and, therefore, should be avoided. The ratio test is an extensively used test to validate the fixed...journal article 2016
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Verhagen, H.J. (author)An overview of the upgrade of the railroad dike in Vlaardingen to a full sea defence, creating in this way a multifunctional flood defence.report 2016
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Verhagen, H.J. (author)For this book we have deliberately chosen that the text should follow a more or less logical design procedure for closure dams. It is emphasized that only the construction aspect of stopping the water movement is considered in this book. This means that only the closing operation itself is treated; the transformation of the closing dam into a...lecture notes 2016
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van Nes, A. (author), López, Manuel (author), de Bonth, L.F.J.M. (author), Verhagen, D.J. (author), Waayer, Simone (author)This contribution describes the tool Social Safe Urban Design (SSUD), seen<br/>together with socio-spatial and linguistic challenges when applying space syntax in the regenerating of problem urban areas. The Space Syntax jargon is technical and needs to be translated into a language understandable and acceptable to stakeholders who are...book chapter 2016
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Zhao, X. (author), Verhagen, W.J.C. (author), Curran, R. (author)The present study develops a method for the sake of evaluating Disposal and Recycle (D&R) cost in view of the increasing demand in aircraft retirement. Firstly, a process model is extracted. The subordinated cost elements are also identified. Next, the cost aggregations based on the D&R process steps are discussed. Moreover, it proposes...book chapter 2016
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Koornneef, H. (author), Verhagen, W.J.C. (author), Curran, R. (author)Currently, task support information in aircraft maintenance is mostly provided using paper-based solutions, which are burdensome, slow and prone to error. Aircraft maintenance documentation contains vast amounts of information irrelevant for the task at hand and even for the simplest tasks multiple documents need to be consulted. Next to these...book chapter 2016
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Dhanisetty, V.S.V. (author), Verhagen, W.J.C. (author), Curran, R. (author)This paper details the development of a decision-making model that evaluates the multiple repair levels that a composite structure can undergo, each with its inherent achievable survivability and consequence to operations in terms of availability, costs, and scheduling. The goal of this model is to provide the maintainer an integrated approach...conference paper 2016
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Le, H.T. (author), Verhagen, H.J. (author), Vrijling, J.K. (author)Grass covers have been applied as an effective measure for protecting river levees and sea dikes. We conducted experiments to show how roots considerably improve the shear strength of soil on dike slopes. Roots of 1-year-old Bermuda and Carpet grass may increase the total shear strength of up to 20 kPa. Exposed to severe overtopping flow, dike...journal article 2016
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Newcamp, Jeffrey (author), Verhagen, W.J.C. (author), Curran, R. (author)Military attack aircraft are susceptible to the harmful effects of widespread fatigue damage caused by cyclic loading of structural components, which leads to airframe retirement. Modern structural health monitoring techniques use a multitude of sensors and high data collection rates. Some legacy airframes, which are most susceptible to fatigue...journal article 2016