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Postma, Tom (author), Jansen, J.D. (author)
Over the past decade, a steep increase in the number of seismic events has been observed in the Groningen gas field, the Netherlands. It is generally accepted that these are induced by compaction of the reservoir rock due to extensive depletion, causing a buildup of strain energy in faults that may be released seismically. We address the...
journal article 2018
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Jesus de Moraes, R. (author), Hajibeygi, H. (author), Jansen, J.D. (author)
In data assimilation problems, various types of data are naturally linked to different spatial resolutions (e.g. seismic and electromagnetic data), and these scales are usually not coincident to the subsurface simulation model scale. Alternatives like down/upscaling of the data and/or the simulation model can be used, but with potential loss of...
conference paper 2018
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Diaz Cortes, G.B. (author), Jansen, J.D. (author), Vuik, C. (author)
We explore and develop POD-based deflation methods to accelerate the solution of large-scale linear systems resulting from two-phase flow simulation. The techniques here presented collect information from the system in a POD basis, which is later used in a deflation scheme. The snapshots required to obtain the POD basis are captured in two ways:...
conference paper 2018
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Fonseca, R. M. (author), Della Rossa, E (author), Emerick, A. A. (author), Hanea, R. G. (author), Jansen, J.D. (author)
Since the early 2000's there has been a significant focus from many groups around the world towards the development and application of innovative technologies in order to improve reservoir management strategies and optimize field development plans. Benchmark studies are a very valuable way of evaluating and demonstrating the status and...
conference paper 2018
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Sandberg, Evelien M. (author), Driessen, Sara R C (author), Bak, Evelien A.T. (author), van Geloven, Nan (author), Berger, Judith P. (author), Smeets, Mathilde J.G.H. (author), Rhemrev, Johann P T (author), Jansen, F.W. (author)
Background: Pelvic endometriosis is often mentioned as one of the variables influencing surgical outcomes of laparoscopic hysterectomy (LH). However, its additional surgical risks have not been well established. The aim of this study was to analyze to what extent concomitant endometriosis influences surgical outcomes of LH and to determine if...
journal article 2018
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Kleinhans, R.J. (author), Veldboer, Lex (author), van Ham, M. (author), Jansen, S.J.T. (author)
Ageing of the population in European cities creates fundamental challenges with regard to employment, pensions, health care and other age-related services. Many older people want to live independent lives as long as possible. This aspiration is currently strongly supported by many local governments. A precondition for 'ageing in place' is that...
journal article 2018
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Jansen, K.M.B. (author), Tarren, Bailey (author), Slingerland, M. (author)
We developed disposable and stretchable on-skin sensors for simple and unobtrusive monitoring of posture and movements during daily activities. Simple sensor platforms like these are expected to become commonly accepted in the near future, not only for posture monitoring but also for e.g. motion monitoring in sports. The paper describes the...
conference paper 2018
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Ewald, V.A. (author), Goby, Xavier (author), Jansen, Hidde (author), Groves, R.M. (author), Benedictus, R. (author)
The near-term artificial intelligence, commonly referred as ‘weak AI’ in the last couple years was achieved thanks to the advances in machine learning (ML), particularly deep learning, which has currently the best in-class performance outperforming other machine learning algorithms. In the deep learning framework, many natural tasks such as...
conference paper 2018
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Steijlen, A.S.M. (author), Jansen, K.M.B. (author), Albayrak, A. (author), Verschure, D. O. (author), Van Wijk, D.F. (author)
Background: Cardiovascular diseases (CVD) are the leading cause of morbidity and mortality worldwide. Early diagnosis is of pivotal importance for patients with cardiac arrhythmias and ischemia to minimize the consequences like strokes and myocardial infarctions. The chance of capturing signals of arrhythmias or ischemia is substantially high...
journal article 2018
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Jansen, A.J. (author), Dekker, M.C. (author), van der Steen, Diederik (author)
Providing athletes with real-time feedback on their performance is becoming common in many sports, also in speed skating. This research-by-design project aims at finding a tool that allows the speed skater to get real-time feedback on his performance. Speed skaters often mention a so-called “good feeling” when skating behind a better skater. It...
conference paper 2018
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Jansen, S.J.T. (author)
abstract 2018
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Hajibeygi, H. (author), Jansen, J.D. (author), Leeuwenburgh, O. (author), Voskov, D.V. (author)
contribution to periodical 2017
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Kip, Nardy (author), Jansen, Stefan (author), Leite, Marcio F.A. (author), De Hollander, Mattias (author), Afanasyev, M. (author), Kuramae, Eiko E. (author), Van Veen, Johannes A. (author)
Microorganisms are able to cause, but also to inhibit or protect against corrosion. Corrosion inhibition by microbial processes may be due to the formation of mineral deposition layers on metal objects. Such deposition layers have been found in archaeological studies on ancient metal objects, buried in soil, which were hardly corroded. Recent...
journal article 2017
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Fatemi, S.A. (author), Jansen, J.D. (author), Rossen, W.R. (author)
An enhanced-oil-recovery (EOR) pilot test has multiple goals, among them to demonstrate oil recovery, verify the properties of the EOR agent in-situ, and provide the information needed for scale-up to an economic process. Given the complexity of EOR processes and the inherent uncertainty in the reservoir description, it is a challenge to...
journal article 2017
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Insuasty, Edwin (author), van den Hof, P.M.J. (author), Weiland, Siep (author), Jansen, J.D. (author)
In reservoir engineering, it is attractive to characterize the difference between reservoir models in metrics that relate to the economic performance of the reservoir as well as to the underlying geological structure. In this paper, we develop a dissimilarity measure that is based on reservoir flow patterns under a particular operational...
journal article 2017
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Siraj, M.M. (author), van den Hof, P.M.J. (author), Jansen, J.D. (author)
Model-based dynamic optimization of the water-flooding process in oil reservoirs is a computationally complex problem and suffers from high levels of uncertainty. A traditional way of quantifying uncertainty in robust water-flooding optimization is by considering an ensemble of uncertain model realizations. These models are generally not...
conference paper 2017
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Jansen, R.J. (author)
Monitoring radio messages while driving is an omnipresent dual-task combination in police work, but it is also one that is considered unsafe for regular drivers. Whereas regular drivers are expected to fully prioritize the driving task, police officers typically do not have the option to stop their car to attend important incoming messages, nor...
doctoral thesis 2017
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Wahl, S.A. (author), Bernal Martinez, C. (author), Zhao, Zheng (author), van Gulik, W.M. (author), Jansen, Mickel L.A. (author)
Background: The metabolic engineering of Saccharomyces cerevisiae for the production of succinic acid has progressed dramatically, and a series of high-producing hosts are available. At low cultivation pH and high titers, the product transport can become bidirectional, i.e. the acid is reentering the cell and is again exported or even...
journal article 2017
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Jesus de Moraes, R. (author), Rodrigues, José R P (author), Hajibeygi, H. (author), Jansen, J.D. (author)
An efficient multiscale (MS) gradient computation method for subsurface flow management and optimization is introduced. The general, algebraic framework allows for the calculation of gradients using both the Direct and Adjoint derivative methods. The framework also allows for the utilization of any MS formulation that can be algebraically...
journal article 2017
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Jansen, P.F.C. (author)
conference paper 2017
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