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Mok, S. (author), Guo, J. (author), Gill, E.K.A. (author), Rajan, R.T. (author)
Orbiting Low Frequency Array for Radio Astronomy (OLFAR) is a radio astronomy mission that has been studied since 2010 by several Dutch universities and research institutes. The mission aims at producing sky maps by collecting cosmic signals at ultra-low wavelengths regimes, below the 30 MHz frequency band. A satellite swarm comprising more than...
conference paper 2020
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Derakhshanfar, P. (author), Olsthoorn, M.J.G. (author), Devroey, Xavier (author)
Model seeding is a strategy for injecting additional information in a search-based test generation process in the form of models, representing usages of the classes of the software under test. These models are used during the search-process to generate logical sequences of calls whenever an instance of a specific class is required. Model seeding...
conference paper 2020
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Evers, B. (author), Derakhshanfar, P. (author), Devroey, Xavier (author), Zaidman, A.E. (author)
Various search-based test generation techniques have been proposed to automate the generation of unit tests fulfilling different criteria (e.g., line coverage, branch coverage, mutation score, etc.). Despite several advances made over the years, search-based unit test generation still suffers from a lack of guidance due to the limited amount of...
conference paper 2020
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Derakhshanfar, P. (author), Devroey, Xavier (author), Zaidman, A.E. (author)
Search-based techniques have been widely used for white-box test generation. Many of these approaches rely on the approach level and branch distance heuristics to guide the search process and generate test cases with high line and branch coverage. Despite the positive results achieved by these two heuristics, they only use the information...
conference paper 2020
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Halin, Axel (author), Nuttinck, Alexandre (author), Acher, Mathieu (author), Devroey, Xavier (author), Perrouin, Gilles (author), Baudry, Benoit (author)
This is an extended abstract of the article: Axel Halin, Alexandre Nuttinck, Mathieu Acher, Xavier Devroey, Gilles Perrouin, and Benoit Baudry. 2018. Test them all, is it worth it? Assessing config- uration sampling on the JHipster Web development stack. In Em- pirical Software Engineering (17 Jul 2018). https://doi.org/10.1007/ s10664-018-9635-4.
conference paper 2020
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Roeling, M.P. (author), Nadeem, A. (author), Verwer, S.E. (author)
Network data clustering and sequential data mining are large<br/>fields of research, but how to combine them to analyze spatial-temporal<br/>network data remains a technical challenge. This study investigates a<br/>novel combination of two sequential similarity methods (Dynamic Time<br/>Warping and N-grams with Cosine distances), with two state...
conference paper 2020
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Kola, I. (author), Jonker, C.M. (author), Tielman, M.L. (author), van Riemsdijk, M.B. (author)
Support agents are investigated more and more as a<br/>way of assisting people in carrying out daily tasks. Support agents<br/>should be flexible in adapting their support to what their user needs.<br/>Research suggests that the situation someone is in affects their behaviour, however its effect has not been incorporated in the decision<br/...
conference paper 2020
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Moonen, D.D.M. (author), Tielman, M.L. (author)
Computer systems are increasingly involved in making decisions. Therefore, it is increasingly important that they understand our values. To make values usable, context is important, both of the individual and the actions they underlie. This work aims to study if it is possible to make it easier to elicit an individual’s values by using the...
conference paper 2020
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Ramasamy, Suganthi (author), Ahmad, Z. (author), Bindu, Yerra (author), Rueda, José L. (author)
This study investigates the reactive power generation capability of the existing transformerless Photovoltaic Inverter Topologies (PVIT) with their conventional switching strategies. The topologies such as H5, families of H6 (H6, H6-I, H6-II, H6-III and H6-IV), HERIC, and clamped topologies (optimized H5, passive clamped H6 and HBZVR) have been...
conference paper 2020
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Wang, C. (author), Tindemans, S.H. (author), Pan, K. (author), Palensky, P. (author)
State estimation is of considerable significance for the power system operation and control. However, well-designed false data injection attacks can utilize blind spots in conventional residual-based bad data detection methods to manipulate measurements in a coordinated manner and thus affect the secure operation and economic dispatch of grids....
conference paper 2020
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van der Meulen, P.Q. (author), Coutino, Mario (author), Kruizinga, P. (author), Bosch, J.G. (author), Leus, G.J.T. (author)
We consider the scenario of finding the transfer function of an aberrating layer in front of an ultrasound array. We are interested in blindly estimating this transfer function without prior knowledge of the unknown ultrasound sources or ultrasound contrast image. The algorithm gives an exact solution if the matrix representing the aberration...
conference paper 2020
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Kolling, B. (author), Abdi, Bahareh (author), Groot, N.M.S. de (author), Hendriks, R.C. (author)
Atrial electrograms are often used to gain understanding on the development of atrial fibrillation (AF). Using such electrograms, cardiologists can reconstruct how the depolarization wave-front propagates across the atrium. Knowing the exact moment at which the depolarization wavefront in the tissue reaches each electrode is an important aspect...
conference paper 2020
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Li, Qiongxiu (author), Heusdens, R. (author), Christensen, M. Graesboll (author)
Over the past decades, privacy-preservation has received considerable attention, not only as a consequence of regulations such as the General Data Protection Regulation in the EU, but also from the fact that people are more concerned about data abuse as the world is becoming increasingly digitized. In this paper we propose a convex optimization...
conference paper 2020
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Çalış, M. (author), Heusdens, R. (author), Hendriks, R.C. (author)
Average consensus algorithms are used in many distributed systems such as distributed optimization, sensor fusion and the control of dynamic systems. Consensus algorithms converge through an explicit exchange of state variables. In some cases, however, the state variables are confidential. In this paper, a privacy-preserving asynchronous...
conference paper 2020
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van der Veen, A.J. (author), Romme, J.P.A. (author), Cui, Ye (author)
In Principal Component Analysis (PCA), the dimension of the signal subspace is detected by counting the number of eigenvalues of a covariance matrix that are above a threshold. Random matrix theory provides accurate estimates for this threshold if the underlying data matrix has independent identically distributed columns. However, in time series...
conference paper 2020
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Fernandez-Menduina, S. (author), Krahmer, F. (author), Leus, G.J.T. (author), Bhandari, A. (author)
Direction-of-arrival (DoA) estimation is a mature topic with decades of history. Despite the progress in the field, very few papers have looked at the problem of DoA estimation with unknown dynamic range. Consider the case of space exploration or near-field and far-field emitters. In such settings, the amplitude of the impinging wavefront can be...
conference paper 2020
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Li, Qiongxiu (author), Coutino, Mario (author), Leus, G.J.T. (author), Christensen, M. Graesboll (author)
With an increasingly interconnected and digitized world, distributed signal processing and graph signal processing have been proposed to process its big amount of data. However, privacy has become one of the biggest challenges holding back the widespread adoption of these tools for processing sensitive data. As a step towards a solution, we...
conference paper 2020
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Zhang, Yu (author), Wang, Yue (author), Tian, Zhi (author), Leus, G.J.T. (author), Zhang, Gong (author)
This paper aims at developing low-complexity solutions for super-resolution two-dimensional (2D) harmonic retrieval via covariance reconstruction. Given the collected sample covariance, a novel gridless compressed sensing approach is designed based on the atomic norm minimization (ANM) technique. The key is to perform a redundancy reduction (RR)...
conference paper 2020
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Coutino, Mario (author), Isufi, E. (author), Maehara, T. (author), Leus, G.J.T. (author)
In this work, we explore the state-space formulation of network processes to recover the underlying network structure (local connections). To do so, we employ subspace techniques borrowed from system identification literature and extend them to the network topology inference problem. This approach provides a unified view of the traditional...
conference paper 2020
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Moghaddasi Kelishomi, H. (author), van der Veen, A.J. (author), de Groot, N.M.S. (author), Hunyadi, B. (author)
Atrial fibrillation (AF) is the most common arrhythmia in the heart. Two main types of AF are defined as paroxysmal and persistent. In this paper, we present a method to discriminate between the characteristics of paroxysmal and persistent using tensor decompositions of a multi-channel electrocardiogram (ECG) signal. For this purpose, ECG...
conference paper 2020
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