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Scale-dependent blending of ensemble rainfall nowcasts and numerical weather prediction in the open-source pysteps library

Imhoff, Ruben O. (author), De Cruz, Lesley (author), Dewettinck, Wout (author), Brauer, Claudia C. (author), Uijlenhoet, R. (author), van Heeringen, Klaas Jan (author), Velasco-Forero, Carlos (author), Nerini, Daniele (author), Van Ginderachter, Michiel (author), Weerts, Albrecht H. (author)

Flash flood early warning requires accurate rainfall forecasts with a high spatial and temporal resolution. As the first few hours ahead are already not sufficiently well captured by the rainfall forecasts of numerical weather prediction (NWP) models, radar rainfall nowcasting can provide an alternative. Because this observation-based method...

journal article 2023

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On-site construction of a point-of-care low-field MRI system in Africa

Obungoloch, Johnes (author), Muhumuza, Ivan (author), Teeuwisse, Wouter (author), Harper, Joshua (author), Etoku, Ivan (author), Asiimwe, Robert (author), Tusiime, Patricia (author), Gombya, George (author), van Gijzen, M.B. (author)

Purpose: To describe the construction and testing of a portable point-of-care low-field MRI system on site in Africa. Methods: All of the components to assemble a 50 mT Halbach magnet-based system, together with the necessary tools, were air-freighted from the Netherlands to Uganda. The construction steps included individual magnet sorting,...

journal article 2023

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Recent Advances in MercuryDPM

Thornton, Anthony R. (author), Plath, Timo (author), Ostanin, Igor (author), Götz, Holger (author), Bisschop, Jan Willem (author), Hassan, Mohamed (author), Roeplal, R.N. (author), Wang, Xiuqi (author), Pourandi, Sahar (author), Weinhart, Thomas (author)

In this paper we introduce the open-source code MercuryDPM: a code for simulating discrete particles. The paper discusses software and management issues that may be interesting for the developers of other open-source codes. Then we review the new features that have been added since the last publication: an improved Hertz-Mindlin model; a new...

journal article 2023

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An Intermediate Representation for Composable Typed Streaming Dataflow Designs

Reukers, Matthijs A. (author), Tian, Y. (author), Al-Ars, Z. (author), Hofstee, H.P. (author), Brobbel, M. (author), Peltenburg, J.W. (author), van Straten, J. (author)

Tydi is an open specification for streaming dataflow designs in digital circuits, allowing designers to express how composite and variable-length data structures are transferred over streams using clear, data-centric types. These data types are extensively used in a many application domains, such as big data and SQL applications. This way,...

journal article 2023

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Disadvantaged communities have lower access to urban infrastructure

Nicoletti, L.A. (author), Sirenko, M. (author), Verma, T. (author)

Disparity in spatial accessibility is strongly associated with growing inequalities among urban communities. Since improving levels of accessibility for certain communities can provide them with upward social mobility and address social exclusion and inequalities in cities, it is important to understand the nature and distribution of spatial...

journal article 2022

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Investigating sentence severity with judicial open data: A case study on sentencing high-tech crime in the Dutch criminal justice system

Hartel, P.H. (author), van Wegberg, R.S. (author), van Staalduinen, Mark (author)

Open data promotes transparency and accountability as everyone can analyse it. Law enforcement and the judiciary are increasingly making data available, to increase trust and confidence in the criminal justice system. Due to privacy legislation, judicial open data — like court judgements — in Europe is usually anonymized. And even if the...

journal article 2022

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DisGUVery: A Versatile Open-Source Software for High-Throughput Image Analysis of Giant Unilamellar Vesicles

van Buren, L. (author), Koenderink, G.H. (author), Martinez Torres, C.E. (author)

Giant unilamellar vesicles (GUVs) are cell-sized aqueous compartments enclosed by a phospholipid bilayer. Due to their cell-mimicking properties, GUVs have become a widespread experimental tool in synthetic biology to study membrane properties and cellular processes. In stark contrast to the experimental progress, quantitative analysis of GUV...

journal article 2022

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OpenSense: An open-source toolbox for inertial-measurement-unit-based measurement of lower extremity kinematics over long durations

Al Borno, Mazen (author), O’Day, Johanna (author), Ibarra, Vanessa (author), Dunne, James (author), Seth, A. (author), Habib, Ayman (author), Ong, Carmichael (author), Hicks, Jennifer (author), Uhlrich, Scott (author), Delp, Scott (author)

Background: The ability to measure joint kinematics in natural environments over long durations using inertial measurement units (IMUs) could enable at-home monitoring and personalized treatment of neurological and musculoskeletal disorders. However, drift, or the accumulation of error over time, inhibits the accurate measurement of movement...

journal article 2022

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Flipped Classroom Real-World Activities for Learning Open Computing Concepts

Bosnić, I. (author), Čavrak, I. (author), van Loenen, B. (author)

Various “open” concepts in Computing, such as open standards, open data, open licenses or system interoperability are becoming more important in the professional lives of software engineers. However, students usually do not receive a systematic education about these concepts; rather they sporadically learn about a subset of these topics. This...

journal article 2022

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Towards wide-scale adoption of open science practices: The role of open science communities

Armeni, Kristijan (author), Brinkman, Loek (author), Carlsson, Rickard (author), Eerland, Anita (author), Fijten, Rianne (author), Fondberg, Robin (author), Heininga, Vera E. (author), Heunis, Stephan (author), Teperek, M. (author)

Despite the increasing availability of Open Science (OS) infrastructure and the rise in policies to change behaviour, OS practices are not yet the norm. While pioneering researchers are developing OS practices, the majority sticks to status quo. To transition to common practice, we must engage a critical proportion of the academic community. In...

journal article 2021

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Fixing vulnerabilities potentially hinders maintainability

Reis, Sofia (author), Abreu, Rui (author), Cruz, Luis (author)

Security is a requirement of utmost importance to produce high-quality software. However, there is still a considerable amount of vulnerabilities being discovered and fixed almost weekly. We hypothesize that developers affect the maintainability of their codebases when patching vulnerabilities. This paper evaluates the impact of patches to...

journal article 2021

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STREAmS: A high-fidelity accelerated solver for direct numerical simulation of compressible turbulent flows

Bernardini, Matteo (author), Modesti, D. (author), Salvadore, Francesco (author), Pirozzoli, Sergio (author)

We present STREAmS, an in-house high-fidelity solver for direct numerical simulations (DNS) of canonical compressible wall-bounded flows, namely turbulent plane channel, zero-pressure gradient turbulent boundary layer and supersonic oblique shock-wave/boundary layer interaction. The solver incorporates state-of-the-art numerical algorithms,...

journal article 2021

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MFEM: A modular finite element methods library

Anderson, Robert (author), Andrej, Julian (author), Barker, Andrew (author), Bramwell, Jamie (author), Camier, Jean Sylvain (author), Cerveny, Jakub (author), Dobrev, Veselin (author), Dudouit, Yohann (author), Akkerman, I. (author)

MFEM is an open-source, lightweight, flexible and scalable C++ library for modular finite element methods that features arbitrary high-order finite element meshes and spaces, support for a wide variety of discretization approaches and emphasis on usability, portability, and high-performance computing efficiency. MFEM's goal is to provide...

journal article 2021

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LEOPART: A particle library for FENICS

Maljaars, J.M. (author), Richardson, Chris N. (author), Sime, Nathan (author)

This paper introduces LEOPART, an add-on for the open-source finite element software library FENICS to seamlessly integrate Lagrangian particle functionality with (Eulerian) mesh-based finite element (FE) approaches. LEOPART- which is so much as to say: ‘Lagrangian–Eulerian on Particles’ - contains tools for efficient, accurate and scalable...

journal article 2021

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Tydi: an open specification for complex data structures over hardware streams

Peltenburg, J.W. (author), Brobbel, M. (author), van Straten, J. (author), Al-Ars, Z. (author), Hofstee, H.P. (author)

Streaming dataflow designs describe hardware by connecting components through streams that transport data structures. We introduce a stream-oriented specification and type system that provides a clear and intuitive way to map complex, dynamically-sized data structures onto hardware streams. This helps designers to lift the abstraction of...

journal article 2020

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Fast, flexible particle simulations: An introduction to MercuryDPM

Weinhart, Thomas (author), Orefice, Luca (author), Post, Mitchel (author), van Schrojenstein Lantman, Marnix P. (author), Denissen, Irana F.C. (author), Tunuguntla, Deepak R. (author), Tsang, J. M.F. (author), de Oliveira Barbosa, J.M. (author), Shi, H. (author)

We introduce the open-source package MercuryDPM, which we have been developing over the last few years. MercuryDPM is a code for discrete particle simulations. It simulates the motion of particles by applying forces and torques that stem either from external body forces, (gravity, magnetic fields, etc.) or particle interactions. The code has...

journal article 2020

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Validation of Meso-Wake Models for Array Efficiency Prediction Using Operational Data from Five Offshore Wind Farms

Rodrigo, Javier Sanz (author), Guillén, Fernando Borbón (author), Fernandes Correia, Pedro M. (author), García Hevia, Bibiana (author), Schlez, Wolfgang (author), Schmidt, Sascha (author), Basu, S. (author), Li, B. (author), Nielsen, Per (author)

journal article 2020

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HeartPy: A novel heart rate algorithm for the analysis of noisy signals

van Gent, P. (author), Farah, H. (author), van Nes, Nicole (author), van Arem, B. (author)

Heart rate data are often collected in human factors studies, including those into vehicle automation. Advances in open hardware platforms and off-the-shelf photoplethysmogram (PPG) sensors allow the non-intrusive collection of heart rate data at very low cost. However, the signal is not trivial to analyse, since the morphology of PPG waveforms...

journal article 2019

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Evaluation of an Open Source Registration Package for Automatic Contour Propagation in Online Adaptive Intensity-Modulated Proton Therapy of Prostate Cancer

Qiao, Yuchuan (author), Jagt, Thyrza (author), Hoogeman, M.S. (author), Lelieveldt, B.P.F. (author), Staring, M. (author)

Objective: Our goal was to investigate the performance of an open source deformable image registration package, elastix, for fast and robust contour propagation in the context of online-adaptive intensity-modulated proton therapy (IMPT) for prostate cancer. Methods: A planning and 7–10 repeat CT scans were available of 18 prostate cancer...

journal article 2019

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Discovering Community Patterns in Open-Source: A Systematic Approach and Its Evaluation

Tamburri, Damian A. (author), Palomba, F. (author), Serebrenik, Alexander (author), Zaidman, A.E. (author)

“There can be no vulnerability without risk; there can be no community without vulnerability; there can be no peace, and ultimately no life, without community.” - [M. Scott Peck]<br/><br/>The open-source phenomenon has reached the point in which it is virtually impossible to find large applications that do not rely on it. Such grand adoption may...

journal article 2019