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Laks, P. (author), Verhagen, W.J.C. (author)This research proposes a decision support tool which identifies cost-optimal maintenance decisions for a given planning period. Simultaneously, the reliability state of the component is kept at or below a given reliability threshold: a failure limit policy applies. The tool is developed to support repair-or-replacement decision making for...conference paper 2018
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Verhagen, W.J.C. (author), De Boer, Lennaert W.M. (author)Unscheduled maintenance can contribute significantly to an airline's cost outlay. 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 the primary stochastic variable, with additional strict assumptions...journal article 2018
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Verhagen, Collin M.A. (author), Visser, H.G. (author), Santos, Bruno F. (author)This paper describes the development of an optimization-based cooperative planning system for the efficient routing and scheduling of extended flight formations. This study considers the use of formation flight as a means to reduce the overall fuel consumption in long-haul airline operations. It elaborates on the operational implementation of...journal article 2018
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Vossen, David M. (author), Verhagen, Caroline V.M. (author), Grénman, Reidar (author), Kluin, Roelof J.C. (author), Verheij, Marcel (author), Van Den Brekel, Michiel W.M. (author), Wessels, L.F.A. (author), Vens, Conchita (author)Background Large cancer genome studies continue to reveal new players in treatment response and tumorigenesis. The discrimination of functional alterations from the abundance of passenger genetic alterations still poses challenges and determines DNA sequence variant selection procedures. Here we evaluate variant selection strategies that...journal article 2018
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Wognum, Nel (author), Bil, Cees (author), Elghc, Fredrik (author), Peruzzini, Margherita (author), Stjepandic, Josip (author), Verhagen, W.J.C. (author)Transdisciplinary research (TDR) has been the subject of discourse in the past few decades, but has bot been studied much in the context of engineering problems. Many engineering problems can be characterized as ill-defined, like open innovation, adoption of new technology, business development, and the adoption of the Industry 4.0 concept....conference paper 2018
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Narayanan, Prasobh (author), Verhagen, W.J.C. (author), Dhanisetty, V.S.V. (author)Airline Maintenance and Engineering (M&E) organizations face accidental damages on their fleet of aircraft as part of daily practice. As this type of damage is stochastic in nature, the approach towards repairing accidental damage is reactive in practice. However, it is possible to predict future long-term (strategic) demand for maintenance...conference paper 2018
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- Psychas, D.V. (author), Verhagen, S. (author), Liu, X. (author), Memarzadeh, Y. (author), Visser, H. (author), Teunissen, P.J.G. (author) other 2018
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Toodesh, R. (author), Verhagen, S. (author)The spatial sampling often used to process and represent bathymetric data are of fixed grid resolution where the least depth value is stored in each grid cell. This results in Digital Elevation Models (DEMs) that are used to depict the underlying features of the seafloor. With the discretion of the user, the resulting DEMs used may either be...journal article 2018
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- Psychas, D.V. (author), Verhagen, S. (author), Liu, X. (author) other 2018
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- Psychas, D.V. (author), Verhagen, S. (author), Liu, Xianglin (author) abstract 2019
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- Psychas, D.V. (author), Verhagen, S. (author), Liu, Xianglin (author) poster 2019
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- Schiereck, G.J. (author), Verhagen, H.J. (author) book 2019
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Verhagen, H.J. (author)In this paper, protection options for a high-value, industrial area along the coast of West Bengal (India) are investigated. The options are designed to protect against cyclone surges with a probability of 1/100 per year. Two alternatives are compared, a classical solution of a dike with a revetment and a solution with a mangrove belt in...journal article 2019
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Vossen, David M. (author), Verhagen, Caroline V.M. (author), van der Heijden, Martijn (author), Essers, Paul B.M. (author), Bartelink, Harry (author), Verheij, Marcel (author), Wessels, L.F.A. (author), van den Brekel, Michiel W.M. (author), Vens, Conchita (author)About half of advanced stage head and neck squamous cell carcinoma (HNSCC) patients can be cured by chemoradiotherapy. Patient outcome may be partially determined by the genetic alterations in HNSCC, rendering these alterations promising candidate prognostic factors and/or therapeutic targets. However, their relevance in patient outcome...journal article 2019
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Wognum, Nel (author), Bil, Cees (author), Elgh, Fredrik (author), Peruzzini, Margherita (author), Stjepandić, Josip (author), Verhagen, W.J.C. (author)Transdisciplinary processes have been the subject of research since several decades already. Transdisciplinary processes are aimed at solving ill-defined and socially relevant problems. Many researchers have studied transdisciplinary processes and have tried to understand the essentials of transdisciplinarity. Many engineering problems can be...journal article 2019
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Psychas, D.V. (author), Verhagen, S. (author), Liu, X. (author), Memarzadeh, Y. (author), Visser, H. (author)This paper presents an analysis of the ionospheric corrections required to get a significant improvement in PPP-RTK performance. The main aim was to determine the improvement in the position precision and Time-To-First-Fix in the PPP-RTK user side using ionospheric corrections computed from a network. The study consists of two main steps. The...journal article 2019
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Newcamp, Jeffrey (author), Verhagen, W.J.C. (author), Santos, Bruno F. (author), Curran, R. (author)Military aircraft retirements are an afterthought for many lifecycle planners. More active management of end-of-life fleets can yield increased confidence in fleet capability and retirement timelines. This work provides fleet managers with a tool to manage remaining aircraft flight hours to yield a desired fleet retirement pattern. It solves...journal article 2019
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Koornneef, H. (author), Verhagen, W.J.C. (author), Curran, R. (author)Delays are costly to airlines in both money and image. A significant number of delays is caused by unexpected technical failures of aircraft systems or components. These failures, if not dealt with efficiently, can cause disruptions in the flight schedule and network. The annual costs of these type of disruptions add up to an estimated cost...conference paper 2019
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Narayanan, Prasobh (author), Verhagen, W.J.C. (author), Dhanisetty, V.S.V. (author)Airline operators face accidental damages on their fleet of aircraft as part of operational practice. Individual occurrences are hard to predict; consequently, the approach towards repairing accidental damage is reactive in aircraft maintenance practice. However, by aggregating occurrence data and predicting future occurrence rates, it is...journal article 2019
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Li, R. (author), Verhagen, W.J.C. (author), Curran, R. (author)Remaining useful life (RUL) prediction is crucial for the implementation of Prognostics and Health Management (PHM) systems, enabling application of predictive maintenance strategies for critical systems (e.g. in aviation, power, railway). Existing literature addresses aspects of data-driven prognostic approaches, with a predominant focus on...conference paper 2019