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Janssen, M.T.G. (author)
Foam-assisted chemical flooding (FACF) is a novel enhanced oil recovery (EOR) methodology that combines the injection of a surfactant slug, to mobilize previously trapped residual oil, with foam generation for drive mobility control, thus displacing the mobilized banked oil. The main goal of this study concerns the understanding of oil...
doctoral thesis 2020
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Janssen, H.J. (author), Oberwittler, Dietrich (author), Koeber, Goeran (author)
Objectives<br/>We examined the effects of victimization on several aspects of well-being in a longitudinal study of a general population sample. Previous research has often been inconclusive, as it was largely based on cross-sectional data and prone to problems of unobserved heterogeneity and selection bias. We examined both between-person...
journal article 2020
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Dun, H. (author), Tiberius, C.C.J.M. (author), Janssen, G.J.M. (author)
In developing a high accuracy terrestrial radio navigation system, as a complement to a global navigation satellite system (GNSS), it is recognized that the performance of time delay estimation is proportional to, and thereby limited by, the signal bandwidth. Given a possibly narrow signal bandwidth, the central carrier phase can,...
journal article 2020
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Janssen, S.A.M. (author), Matias, Diogo (author), Sharpanskykh, Alexei (author)
Airports are attractive targets for terrorists, as they are designed to accommodate and process large amounts of people, resulting in a high concentration of potential victims. A popular method to mitigate the risk of terrorist attacks is through security patrols, but resources are often limited. Game theory is commonly used as a methodology...
journal article 2020
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Purwanto, A. (author), Zuiderwijk-van Eijk, A.M.G. (author), Janssen, M.F.W.H.A. (author)
Purpose: Citizen engagement is key to the success of many Open Government Data (OGD) initiatives. However, not much is known regarding how this type of engagement emerges. This study aims to investigate the necessary conditions for the emergence of citizen-led engagement with OGD and to identify which factors stimulate this type of engagement...
journal article 2020
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Kiragosyan, Karine (author), Picard, Magali (author), Sorokin, Dimitry Y. (author), Dijkstra, Jelmer (author), Klok, Johannes B.M. (author), Roman, Pawel (author), Janssen, Albert J.H. (author)
Removal of organic and inorganic sulfur compounds from sour gases is required because of their toxicity and atmospheric pollution. The most common are hydrogen sulfide (H<sub>2</sub>S) and methanethiol (MT). Under oxygen-limiting conditions about 92 mol% of sulfide is oxidized to sulfur by haloalkaliphilic sulfur-oxidizing bacteria (SOB),...
journal article 2020
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Gkouzou, A. (author), Janssen, G.C.A.M. (author), van Spengen, W.M. (author)
In this paper, we report on the in situ synthesis of graphene layers by means of chemical vapor deposition (CVD), directly on nickel micro-electromechanical systems (MEMS) surfaces. We have developed MEMS structures of which the temperature can be increased locally by Joule heating while in a methane environment. For our MEMS structures, the...
journal article 2020
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Janssen, S.K.H. (author), Vreugdenhil, H.S.I. (author), Hermans, L.M. (author), Slinger, J (author)
Nature-based flood defence is an innovative design alternative for achieving protection against flooding. Despite significant advancements in science, models and concepts, routine implementation beyond pilot projects remains limited. To better understand why, we have looked into the complexities of nature-based flood defence implementation...
journal article 2020
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Janssen, M.F.W.H.A. (author), Weerakkody, Vishanth (author), Ismagilova, Elvira (author), Sivarajah, Uthayasankar (author), Irani, Zahir (author)
The adoption of blockchain technologies require the consideration of a broad range of factors, over and above the predominantly technology focus of most current work. Whilst scholarly literature on blockchain technology is only beginning to emerge, majority are focused on the technicalities of the technology and tend to ignore the...
journal article 2020
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Janssen, M.T.G. (author), Torres Mendez, Fabian A. (author), Zitha, P.L.J. (author)
History-matching of core-flood experimental data through numerical modeling is a powerful tool to get insight into the relevant physical parameters and mechanisms that control fluid flow in enhanced oil recovery processes. We conducted a mechanistic numerical simulation study aiming at modeling previously performed water-alternating-gas and...
journal article 2020
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van Iersel, L.J.J. (author), Janssen, R. (author), Jones, M.E.L. (author), Murakami, Y. (author), Zeh, Norbert (author)
A common problem in phylogenetics is to try to infer a species phylogeny from gene trees. We consider different variants of this problem. The first variant, called Unrestricted Minimal Episodes Inference, aims at inferring a species tree based on a model with speciation and duplication where duplications are clustered in duplication episodes....
journal article 2020
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Janssen, H.J. (author), Oberwittler, Dietrich (author), Gerstner, Dominik (author)
Although urban disorder has played a central role in neighborhood research, its impact may have been overstated in studies relying on the subjective perception of survey respondents only. Research on the “perception bias”—defined as the divergence between respondents’ subjective assessments and systematic observations of disorder—has revealed...
journal article 2019
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Janssen, R. (author), Klawitter, Jonathan (author)
Rearrangement operations transform a phylogenetic tree into another one and hence induce a metric on the space of phylogenetic trees. Popular operations for unrooted phylogenetic trees are NNI (nearest neighbour interchange), SPR (subtree prune and regraft), and TBR (tree bisection and reconnection). Recently, these operations have been extended...
journal article 2019
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Rikken, O.K. (author), Janssen, M.F.W.H.A. (author), Roosenboom-Kwee, Z. (author)
The rise of blockchain has resulted in discussions on (new) governance models with multiple actors collaborating. Incidents and problems occurred due to flaws in blockchain protocols, smart contracts and Decentralized Autonomous Organizations (DAOs). Often it is unclear how decisions are made concerning evolvement of blockchain applications. In...
journal article 2019
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Janssen, H.J. (author), Kleinhans, R.J. (author), van Ham, M. (author), Melo, Patrícia (author), Andersson, Eva (author), Malmberg, Bo (author)
other 2019
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Purwanto, A. (author), Zuiderwijk-van Eijk, A.M.G. (author), Janssen, M.F.W.H.A. (author)
Engaging citizens in open data hackathons provides opportunities for innovation and the generation of new services and products. This paper aims to explore the motivations of citizens who engage in open agriculture data hackathons. We conducted a case study and analyzed data collected from 161 participants of 11 farming hackathons held between...
conference paper 2019
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Grover, Purva (author), Kar, Arpan Kumar (author), Janssen, M.F.W.H.A. (author), Ilavarasan, P. Vigneswara (author)
Although blockchain has attracted a great deal of attention from academia and industry there is a lack of studies on acceptance drivers. This study explores blockchain acceptance by mining the collective intelligence of users on Twitter. It maps blockchain user acceptance drivers to technology acceptance constructs. The analysis shows that...
journal article 2019
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Janssen, S.A.M. (author), Sharpans'kykh, O.A. (author), Curran, R. (author)
Security risk management is essential for ensuring effective airport operations. This article introduces AbSRiM, a novel agent-based modeling and simulation approach to perform security risk management for airport operations that uses formal sociotechnical models that include temporal and spatial aspects. The approach contains four main steps:...
journal article 2019
document
Janssen, M.F.W.H.A. (author)
IT Governance is often viewed as an important factor for creating business value for firms. However, there is limited work investigating the relationship between architectural governance and the contributions of enterprise architecture (EA) to firm performance. Based on a study of more than 15 cases the analyzes shows that architectural...
conference paper 2019
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Janssen, M.T.G. (author), Mutawa, Abdulaziz S. (author), Pilus, Rashidah M. (author), Zitha, P.L.J. (author)
The novel enhanced oil recovery (EOR) technique combining the reduction of oil/water (o/w) interfacial tensions (IFT) to ultralow values and generation of a foam drive for mobility control is known as foam-assisted chemical flooding (FACF). We present a well-controlled laboratory study on the feasibility of FACF at reservoir conditions. Two...
journal article 2019
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