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Psychas, D.V. (author), Verhagen, S. (author), Teunissen, P.J.G. (author)
A single-receiver integer ambiguity resolution-enabled precise point positioning (PPP-RTK) user experiences a long convergence time when the rather weak single-constellation dual-frequency ionosphere-float model is used. Nowadays, the rapid development of Global Navigation Satellite Systems (GNSS) provides a multitude of available satellites...
journal article 2020
document
Ma, H. (author), Zhao, Qile (author), Verhagen, S. (author), Psychas, D.V. (author), Liu, Xianglin (author)
The benefits of an increased number of global navigation satellite systems (GNSS) in space have been confirmed for the robustness and convergence time of standard precise point positioning (PPP) solutions, as well as improved accuracy when (most of) the ambiguities are fixed. Yet, it is still worthwhile to investigate fast and high-precision...
journal article 2020
document
Ma, H. (author), Zhao, Qile (author), Verhagen, S. (author), Psychas, D.V. (author), Dun, H. (author)
This contribution implements the Kriging interpolation in predicting the tropospheric wet delays using global navigation satellite system networks. The predicted tropospheric delays can be used in strengthening the precise point positioning models and numerical weather prediction models. In order to evaluate the performances of the Kriging...
journal article 2020
document
Squazzoni, Flaminio (author), Polhillb, J. Gareth (author), Edmonds, Bruce (author), Ahrweiler, Petra (author), Antosz, Patrycja (author), Scholz, G. (author), Chappin, E.J.L. (author), Borit, Melania (author), Verhagen, Harko (author), Giardini, Francesca (author), Gilbert, Nigel (author)
The COVID-19 pandemic is causing a dramatic loss of lives worldwide, challenging the sustainability of our health care systems, threatening economic meltdown, and putting pressure on the mental health of individuals (due to social distancing and lock-down measures). The pandemic is also posing severe challenges to the scientific community, with...
journal article 2020
document
Vink, J. (author), Santos, Bruno F. (author), Verhagen, W.J.C. (author), Medeiros, I. (author), Filho, R. (author)
This paper presents a new approach for solving the recovery of the airline schedule when disruptions have occurred. The goal is to develop an operational tool that provides the airline with a solution in less than one minute. The proposed recovery model uses a heuristic that iteratively solves selections of the airline's fleet in order to...
journal article 2020
document
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
document
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
document
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
document
Schiereck, G.J. (author), Verhagen, H.J. (author)
book 2019
document
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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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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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
document
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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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
document
Psychas, D.V. (author), Verhagen, S. (author), Liu, X. (author)
other 2018
document
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
document
Psychas, D.V. (author), Verhagen, S. (author), Liu, X. (author), Memarzadeh, Y. (author), Visser, H. (author), Teunissen, P.J.G. (author)
other 2018
document
Psychas, D.V. (author), Verhagen, S. (author), Liu, X. (author), Memarzadeh, Y. (author), Visser, H. (author), Teunissen, P.J.G. (author)
abstract 2018
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