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Mertzanis, Nick (author)This thesis investigates the integration of algorithm unrolling and genetic algorithms (GA) for optimizing pump scheduling in water distribution systems (WDS), a critical component for ensuring energy-efficient water delivery. In the context of modern civilization’s reliance on clean, affordable water for diverse uses, the operation of a WDS,...master thesis 2024
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Eickhoff, Jerrit (author)Online gaming is the world’s largest entertainment industry by revenue, and supports over 3 billion consumers worldwide. Many of the world’s most popular online games must manage millions of concurrent players through a single unified service. Achieving performant and scalable online games is challenging. Online games are subject to stringent...master thesis 2024
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Failure anticipation scheme in distribution systems based on wave distortions and Montecarlo methodsBhandia, R. (author), de Jesus Chavez, Jose (author), Cvetkovic, M. (author), Garcia-Vite, Pedro M. (author), Popov, M. (author), Palensky, P. (author)Anticipating failures is vital for maintaining a reliable power supply. Advanced measurement devices in the grid generate vast data that contains valuable information on grid operations. Initial signatures of an incipient failure are often reflected in this data in the form of electrical waveform distortions. Conventional protection schemes are...review 2024
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Rietveld, Mike (author)Efficient distribution is crucial in many industries today, especially in retail, where customer demand grows rapidly. The rise of online shopping and automation has led to a shift towards using Central Distribution Centers (CDCs). Retailers are part of this trend, which requires them to rethink how they handle their distribution. This study...master thesis 2023
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Residual Ground Fault Detector for Bipolar LVDC Grids: A Novel Approach towards Selective ProtectionBalaji Subramanian, Balaji (author)LVDC Distribution systems are becoming popular due to the avenue of integrating renewable energy sources on a large scale. Predominant DC based power system architecture has been predicted to serve the needs of a sustainable society that holds the capability to self-generate, share, and trade power produced from renewable energy sources. Bottom ...master thesis 2023
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Hernandez Quintanilla, Tomás (author)Similarity joins are operations which involve identifying similar pairs of records within one or multiple datasets. These operations are typically time-sensitive, as timely identification of relations can lead to increased profitability. Therefore, it is advantageous to analyze them using a stream processing system, which offers real-time...master thesis 2023
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Pîrcălăboiu, Laura (author)Docker has been one of the most widely used DevOps tools in the last decade, enabling fast development of personalized services. Indeed, the common practice is to reuse already available containers and customize them based on the developer's needs. DockerHub is the leading platform for uploading and downloading Docker containers. Unfortunately,...master thesis 2023
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Petrov, Martin (author)Consensus algorithms, as well as distributed systems in general, are vulnerable to concurrency bugs due to non-determinism. Such bugs are hard to detect since it is necessary to test using a lot of different scenarios and even then, there is no guarantee to find one. <br/><br/>Controlled concurrency testing is a proposed solution to that problem...bachelor thesis 2023
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Gavalas, Nikos (author)The adoption of the serverless architecture and the Function-as-a-Service model has significantly increased in recent years, with more enterprises migrating their software and hardware to the cloud. However, most applications require state management, leading to the use of external databases. To alleviate the burden of state management, there...master thesis 2023
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Dekker, Nick (author)Fault injection has been a long-standing technique for testing software. Injecting faults into a system, either in production or development environments, offers unique opportunities to discover bugs that are difficult to reproduce using conventional testing methods. However, it is widely considered to have a high implementation threshold. Due...master thesis 2023
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Koning, Robbert (author)Recent years have seen an increasing interest in stablecoins from major corporate and governmental parties. The European Central Bank is investigating the possibility of introducing its own Central Bank Digital Currency. The desired features of such a currency are under discussion. One such feature is offline spending: the ability to use the...master thesis 2023
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van Meerten, M.C. (author), Kulahcioglu Ozkan, Burcu (author), Panichella, A. (author)Blockchain systems are prone to concurrency bugs due to the nondeterminism in the delivery order of messages between the distributed nodes. These bugs are hard to detect since they can only be triggered by a specific order or timing of concurrent events in the execution. <br/>Systematic concurrency testing techniques, which explore all possible...conference paper 2023
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Fang, Jiaxing (author), Dai, Zihan (author), Li, Xiaoming (author), van der Hoek, J.P. (author), Savić, Dragan (author), Medema, G.J. (author), van der Meer, Walter (author), Liu, G. (author)Biofilm detachment contributes to water quality deterioration. However, the contributions of biofilm detachment from different pipes have not been quantified or compared. Following the introduction of partial reverse osmosis (RO) in drinking water production, this study analyzed particles at customers’ ends and tracked their origins to water...journal article 2023
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Murillo, Andrés (author), Taormina, R. (author), Tippenhauer, Nils Ole (author), Salaorni, Davide (author), van Dijk, Robert (author), Jonker, Luc (author), Vos, Simcha (author), Weyns, Maarten (author), Galelli, Stefano (author)Numerical simulation models are a fundamental tool for planning and managing smart water networks—an evolution of water distribution systems in which physical assets are monitored and controlled by information and communication technologies. While simulation models allow us to understand the interactions between physical processes and abstract...journal article 2023
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Kerimov, B. (author), Bentivoglio, Roberto (author), Garzón Díaz, J.A. (author), Isufi, E. (author), Tscheikner-Gratl, Franz (author), Steffelbauer, David Bernhard (author), Taormina, R. (author)Metamodels accurately reproduce the output of physics-based hydraulic models with a significant reduction in simulation times. They are widely employed in water distribution system (WDS) analysis since they enable computationally expensive applications in the design, control, and optimisation of water networks. Recent machine-learning-based...journal article 2023
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Murillo, Andrés (author), Taormina, R. (author), Tippenhauer, Nils Ole (author), Galelli, Stefano (author)A fundamental problem in the realm of cyber-physical security of smart water networks is attack detection, a key step towards designing adequate countermeasures. This task is typically carried out by algorithms that analyze time series of process data. However, the nature of the data available to develop these algorithms limits their...journal article 2023
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Gorrasi, Chiara (author), Koirala, Arpan (author), Bruninx, K. (author), Delarue, Erik (author), Van Hertem, Dirk (author)Assessing the capability of a distribution grid to accommodate new solar PV installations, namely its hosting capacity (HC), has been a prevalent research topic. Although providing a technical limit to how much additional solar PV can be integrated into a distribution grid without trespassing operational limits, commonly used HC analysis (HCA)...conference paper 2023
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Designing resilient and economically viable water distribution systems: A Multi-dimensional approachCassottana, Beatrice (author), Balakrishnan, Srijith (author), Aydin, N.Y. (author), Sansavini, Giovanni (author)Enhancing the resilience of critical infrastructure systems requires substantial investment and entails trade-offs between environmental and economic benefits. To this aim, we propose a methodological framework that combines resilience and economic analyses and assesses the economic viability of alternative resilience designs for a Water...journal article 2023
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Gkavanoudis, Spyros I. (author), Malamaki, Kyriaki Nefeli D. (author), Kontis, Eleftherios O. (author), Demoulias, Charis S. (author), Shekhar, A. (author), Mushtaq, U. (author), Venu, Sagar Bandi (author)The variability of the output power of distributed renewable energy sources (DRESs) that originate from the fast-changing climatic conditions can negatively affect the grid stability. Therefore, grid operators have incorporated ramp-rate limitations (RRLs) for the injected DRES power in the grid codes. As the DRES penetration levels increase,...journal article 2023
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Ahmad, J.I. (author)Drinking water distribution systems (DWDSs) are intended to supply hygienically safe and biostable water for human consumption. To supply aesthetically pleasant drinking water at the customers tap, water treatment and supply requires energy for production and distribution purposes (e.g. overall between 0.47 kWh/m<sup>3</sup> in the Netherlands)....doctoral thesis 2022